Refrigeration equipment

Abstract

The utility model relates to the technical field of household appliances, in particular to refrigeration equipment. The refrigeration equipment comprises a box body, an evaporator, a temperature changing device, a driving fan, a temperature detecting element and a controller, the temperature detection element can detect the temperature of the variable temperature chamber in real time; the temperature changing device comprises a cylinder body and a radio frequency thawing system arranged on the cylinder body; a variable-temperature chamber is formed in the cylinder body, the driving fan can drive air to flow in the variable-temperature chamber and the air duct chamber, and when one of the driving fan and the radio frequency thawing system operates, the other one stops operating; and the controller is electrically connected with the radio frequency thawing system, the driving fan and the temperature detection element. According to the temperature changing device, the quick freezing function, the radio frequency unfreezing function and the refrigerating function are integrated, the unfrozen objects to be stored can be refrigerated and stored without repeated freezing, repeated unfreezing is not needed, and the risk that the quality of the objects to be stored is reduced due to repeated unfreezing is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and particularly relates to a refrigeration device. Background Art

[0002] During the storage process of food ingredients, it is necessary to freeze them to maintain their quality and prevent spoilage. The frozen food ingredients need to be thawed before processing or consumption.

[0003] In order to improve the convenience of user use, some existing freezing compartments integrate both freezing function and thawing function. However, in the actual use process, the quality of the food ingredients stored in the freezing compartment is not good after thawing. Summary of the Utility Model

[0004] The utility model aims to at least improve the quality of the stored food ingredients after thawing to a certain extent.

[0005] To achieve the above object, the utility model provides a refrigeration device, including: a box body, an evaporator, a variable temperature device, a driving fan, a temperature detection element and a controller; the interior of the box body is partitioned to form a storage compartment and an air duct compartment, and the air duct compartment has a cold cycle inlet and a cold cycle outlet;

[0006] The evaporator is housed in the air duct compartment; the temperature detection element can detect the temperature of the variable temperature chamber in real time;

[0007] The variable temperature device is housed in the storage compartment; the variable temperature device includes a cylinder body, a door body and a radio frequency thawing system provided on the cylinder body; a variable temperature chamber is provided inside the cylinder body, an opening is provided on the front side of the variable temperature chamber, and the door body can open and close the opening; an air inlet and an air return port are provided on the chamber wall of the variable temperature chamber; the air inlet is communicated with the cold cycle outlet, and the air return port is communicated with the cold cycle inlet;

[0008] The driving fan can drive air to flow between the variable temperature chamber and the air duct compartment. When one of the driving fan and the radio frequency thawing system operates, the other stops operating;

[0009] The controller is electrically connected to the radio frequency thawing system, the driving fan and the temperature detection element.

[0010] In this embodiment, the variable temperature device integrates the functions of quick freezing, radio frequency thawing and refrigeration. In this way, the object to be stored placed in the variable temperature chamber can be quickly frozen and stored, the object to be stored after quick freezing can be radio frequency thawed, and the object to be stored after thawing can be refrigerated and stored.

[0011] In the actual application process, when the user fails to pick up the object to be stored that has been thawed in time, the object to be stored after thawing is converted to refrigerated storage, without repeated freezing and thawing. This is beneficial to avoiding the quality decline of the object to be stored caused by repeated thawing, and can make the object to be stored after thawing have good quality.

[0012] In addition, according to the above-mentioned refrigeration equipment of the present utility model, the following additional technical features may also be provided:

[0013] According to an embodiment of the present utility model, the refrigeration equipment further includes a thaw timer electrically connected to the controller, and the thaw timer is used to time the operation time of the radio frequency thawing system.

[0014] According to an embodiment of the present utility model, the controller is configured to control the driving fan to stop or reduce the rotation speed when the temperature detected by the temperature detection element is within the set temperature range, so that the temperature of the variable temperature chamber rises; the temperature value of the set temperature range is negative and close to zero;

[0015] The controller is configured to control the driving fan to increase the rotation speed when the temperature detected by the temperature detection element exceeds the upper limit value of the set temperature range, so that the temperature of the variable temperature chamber decreases.

[0016] According to an embodiment of the present utility model, the refrigeration equipment further includes a first timer electrically connected to the controller, and the first timer is used to accumulate the duration of the temperature rise of the variable temperature chamber.

[0017] According to an embodiment of the present utility model, the refrigeration equipment further includes a second timer electrically connected to the controller, and the second timer is used to time the time when the temperature of the variable temperature chamber is lower than the upper limit value.

[0018] According to an embodiment of the present utility model, the refrigeration equipment further includes a third timer controller electrically connected to the controller. The controller is further configured to control the driving fan to stop or reduce the rotation speed when the cumulative timing duration of the second timer reaches the time threshold, the temperature of the variable temperature chamber is lower than the lower limit value and does not remain constant within the expected duration, so that the temperature of the variable temperature chamber rises, and the third timer is used for timing at the same time; the controller is configured to control the driving fan to increase the rotation speed when the cumulative timing duration of the third timer reaches the forced temperature rise duration, so that the temperature of the variable temperature chamber decreases.

[0019] According to an embodiment of the present utility model, the set temperature range is -2.5°C to -0.7°C.

[0020] According to an embodiment of the present utility model, the refrigeration equipment further includes a quick-freeze start switch electrically connected to the controller; and / or, the refrigeration equipment further includes a thaw switch electrically connected to the controller.

[0021] According to an embodiment of the present utility model, the cylinder body and the door body are metal parts, and the temperature detection element is arranged outside the cylinder body and contacts the chamber wall of the variable temperature chamber.

[0022] According to an embodiment of the present utility model, an installation chamber is further provided inside the cylinder body, and the installation chamber is isolated from the variable temperature chamber; the radio frequency thawing system includes a radio frequency generating device disposed in the installation chamber and a radio frequency transmitting assembly disposed in the variable temperature chamber. The radio frequency generating device provides power for the radio frequency transmitting assembly, and the radio frequency transmitting assembly is used to radiate radio frequency energy into the variable temperature chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0024] Figure 1 Schematically shown is a vertical cross-sectional view of a refrigerator according to an embodiment of the present disclosure;

[0025] Figure 2 is Figure 1 a vertical cross-sectional view of the variable temperature device part of the refrigerator shown in ;

[0026] Figure 3 is Figure 1 a top-down cross-sectional view of the refrigerator shown in when the driving fan is running;

[0027] Figure 4 is Figure 1 a block diagram of the control system of the refrigerator shown in ;

[0028] Figure 5 is Figure 1 a three-dimensional schematic view of the cylinder body of the variable temperature device shown in.

[0029] Among them, the reference numerals are as follows:

[0030] 100, refrigeration equipment;

[0031] 10, box body; 11, air duct cover plate; 111, cold circulation inlet; 112, cold circulation outlet;

[0032] 20, refrigeration system; 21, compressor; 22, evaporator;

[0033] 30, controller;

[0034] 40, variable temperature device; 41, cylinder body; 411, partition; 412, air inlet; 413, air return port; 414, top plate; 415, bottom plate; 416, side plate; 42, radio frequency thawing system; 421, radio frequency generating device; 4211, power supply; 4212, inductor; 422, radio frequency transmitting assembly; 43, door body;

[0035] 50. Driving fan;

[0036] 60. Temperature detection element; 61. Quick-freezing start switch; 62. Thawing switch; 63. First timer; 64. Second timer; 65. Third timer; 66. Quick-freezing duration timer; 67. Thawing timer;

[0037] A1. Storage compartment; A11. Freezing compartment; A2. Air duct compartment;

[0038] P1. Variable temperature chamber; P2. Installation chamber. Detailed implementation manner

[0039] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0040] It should be understood that the terms used herein are only for the purpose of describing specific exemplary embodiments and are not intended to be limiting. Unless otherwise clearly specified in the context, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the execution order is explicitly stated. It should also be understood that additional or alternative steps can be used.

[0041] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms can only be used to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless otherwise clearly specified in the context, terms such as "first" and "second" and other numerical terms used herein do not imply an order or sequence. Therefore, the first element, component, region, layer, or section discussed below can be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0042] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "upper", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation in addition to the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "upper" other elements or features. Therefore, the exemplary term "below" can include both upper and lower orientations.

[0043] In the related art, a freezing compartment integrates both a freezing function and a thawing function. However, the quality of the foodstuffs stored in the freezing compartment is poor after thawing. The reasons are as follows:

[0044] First of all, during the freezing process, the foodstuffs stay in the temperature range corresponding to the ice crystal formation zone for a long time, and the cell membranes of the foodstuffs are more easily pierced by ice crystals, resulting in juice loss of the foodstuffs after thawing.

[0045] Secondly, during the thawing process, microwave heating is used, and the foodstuffs are unevenly heated.

[0046] Thirdly, after the foodstuffs are thawed, if the user fails to pick up the stored items that have been thawed in time and the stored items are frozen again for preservation, when the user needs to eat or process them, thawing needs to be carried out again. That is to say, both the freezing process and the thawing process are carried out multiple times, resulting in the quality of the foodstuffs being prone to decline and even deteriorate seriously in severe cases.

[0047] To solve the above problems, embodiments of the present disclosure provide a refrigeration device. The refrigeration device suppresses the reproduction of bacteria by creating a low-temperature environment so that the stored items are preserved. The stored items are not limited to foodstuffs (for example, meat, seafood), and can also be ice cubes, beverages, etc. Figure 1 Schematically shown is a schematic cross-sectional view of a refrigerator according to an embodiment of the present disclosure in the vertical direction. Please refer to Figure 1 , the refrigeration device can be a refrigerator, or a freezer or a wine cabinet. In the following, the refrigerator is taken as an example to introduce the refrigeration device of this embodiment in detail. For ease of understanding, in the respective drawings of the embodiments of the present disclosure, the X-axis, Y-axis, and Z-axis directions respectively represent the left-right direction, the front-back direction, and the height direction (which can also be referred to as the vertical direction) of the refrigerator.

[0048] As Figure 1As shown, the refrigeration device 100 includes a box body 10 and a refrigeration system 20. An air duct cover plate 11 is provided inside the box body 10. The air duct cover plate 11 divides the interior of the box body 10 into a storage compartment A1 and an air duct compartment A2. The storage compartment A1 includes at least one refrigeration compartment. Among them, the refrigeration compartment can be a refrigerating compartment or a freezing compartment A11. The refrigerating compartment can refrigerate the items to be stored at a temperature of 0°C to +8°C, that is, the preset storage temperature of the refrigerating compartment is 0°C to +8°C. The freezing compartment A11 can freeze the items to be stored at a freezing temperature of -20°C to -15°C, that is, the preset storage temperature of the freezing compartment A11 is -20°C to -15°C.

[0049] In some embodiments of the present disclosure, there can be multiple refrigeration compartments, and at least one of the multiple refrigeration compartments is a refrigerating compartment and at least one is a freezing compartment A11.

[0050] The refrigeration system 20 includes a compressor 21, an evaporator 22, a condenser, and a throttling device (not shown in the figure). The exhaust port of the compressor 21 is connected to the condenser. The outlet pipe of the condenser is connected to the evaporator 22. The evaporator 22 is connected to the inlet of the compressor 21 through a return pipe. The throttling device is arranged between the condenser and the evaporator 22. Exemplarily, a compressor chamber for the compressor 21 can also be formed inside the box body 10, and the compressor 21 can be accommodated in the compressor chamber. The evaporator 22 is accommodated in the air duct compartment A2. Among them, the throttling device can be any one of a capillary tube, an electronic expansion valve, and a throttle valve.

[0051] The refrigeration device 100 further includes a circulation fan (not shown in the figure). The circulation fan controllably sends the air heat-exchanged with the evaporator 22 in the air duct compartment A2 into the refrigeration compartment, so that the items to be stored in the refrigeration compartment can reach the preset storage temperature.

[0052] Figure 2 For Figure 1 a schematic vertical cross-sectional view of the temperature-changing device 40 part of the refrigerator shown in Figure 3 For Figure 1 a schematic top-view cross-sectional view of the refrigerator shown in Figures 1 to 3 As shown, the refrigeration device 100 further includes a temperature-changing device 40, and the temperature-changing device 40 is accommodated in the storage compartment A1. The temperature-changing device 40 includes a cylinder body 41 and a door body 43. The interior of the cylinder body 41 has a temperature-changing chamber P1 for accommodating items to be stored. The front side of the temperature-changing chamber P1 is open, and the door body 43 is used to open and close the opening. When the opening is in the open state, the user can conveniently store the items to be stored into the temperature-changing chamber P1 through the opening. When the opening is in the closed state, the temperature-changing chamber P1 can be isolated from the external environment of the refrigerator. Among them, the front side refers to the side of the refrigerator facing the user in the Y-axis direction. On the contrary, the rear side refers to the side of the refrigerator facing away from the user in the Y-axis direction.

[0053] Among them, the variable-temperature chamber P1 and at least one refrigerating chamber are arranged in sequence in the vertical direction. When there are a refrigerating chamber and a freezing chamber A11, the variable-temperature chamber P1 is located between the refrigerating chamber and the freezing chamber A11.

[0054] Among them, the air duct chamber A2 may have a cold cycle inlet 111 and a cold cycle outlet 112, and the cold cycle inlet 111 and the cold cycle outlet 112 may be arranged on the air duct cover plate 11. An air inlet 412 and an air return port 413 are arranged on the chamber wall of the variable-temperature chamber P1. The air inlet 412 is communicated with the cold cycle outlet 112, and the air return port 413 is communicated with the cold cycle inlet 111.

[0055] The refrigeration device 100 further includes a driving fan 50. When the driving fan 50 works, the air in the variable-temperature chamber P1 flows out from the air return port 413, then flows into the air duct chamber A2 through the cold cycle inlet 111 to exchange heat with the evaporator 22. The cooled air flows out of the air duct chamber A2 from the cold cycle outlet 112, and then flows into the variable-temperature chamber P1 through the air inlet 412 to deliver cold to the variable-temperature chamber P1. The cold air exchanges heat with the object to be stored, so that the temperature of the object to be stored is reduced. The air that has exchanged heat with the object to be stored flows out from the air return port 413 again, thus starting the next cycle. In other words, the air return port 413, the cold cycle inlet 111, the air duct chamber A2, the cold cycle outlet 112, the air inlet 412 and the variable-temperature chamber P1 are connected in sequence to form a cold cycle flow path, and the flow direction of the air along the cold cycle flow path is shown by a solid arrow.

[0056] As Figure 1 shown, the variable-temperature device 40 further includes a radio frequency thawing system 42, and the radio frequency thawing system 42 is arranged in the cylinder body 41. When the radio frequency thawing system 42 works, it can radiate radio frequency energy into the variable-temperature chamber P1 to thaw the object to be stored.

[0057] When one of the above driving fan 50 and the above radio frequency thawing system 42 runs, the other stops running. That is to say, the driving fan 50 and the radio frequency thawing system 42 do not run simultaneously. When the driving fan 50 runs to deliver cold to the variable-temperature chamber P1, the radio frequency thawing system 42 does not work. When the radio frequency thawing system 42 runs to thaw the object to be stored, the driving fan 50 does not work.

[0058] Figure 4 For Figure 1 the block diagram of the control system of the refrigerator shown in Figure 4 shown, the refrigeration device 100 further includes a temperature detection element 60 and a controller 30. The temperature detection element 60 is used to detect the temperature in the variable-temperature chamber P1 in real time. The controller 30 is electrically connected to the temperature detection element 60, the driving fan 50 and the radio frequency thawing system 42.

[0059] The controller 30 is configured to control the driving fan 50 to operate when a quick-freezing instruction is received, so that the object to be stored in the variable-temperature chamber P1 can reach the quick-freezing temperature. The controller 30 is also configured to control the radio-frequency thawing system 42 to operate when a thawing instruction is received, so as to thaw the object to be stored, and then perform refrigeration control to reduce the temperature of the variable-temperature chamber P1 and maintain it within a set temperature range, and the temperature value of the set temperature range is negative and close to zero.

[0060] Wherein, the quick-freezing temperature is lower than the preset preservation temperature of the refrigerating compartment, and the value range of the quick-freezing temperature is, for example, -38°C and -42°C. That is to say, the upper limit of the set temperature range is less than 0°C and close to 0°C, and the lower limit of the set temperature range is much higher than the quick-freezing temperature.

[0061] An exemplary working process of the refrigerator according to the embodiment of the present disclosure during use is as follows:

[0062] The user operates the door body 43 to open the opening, places the object to be stored into the variable-temperature chamber P1, and triggers the generation of a quick-freezing instruction.

[0063] Quick-freezing stage. The controller 30 receives the quick-freezing instruction and controls the refrigeration system 20 and the driving fan 50 to work. Driven by the driving fan 50, the air in the variable-temperature chamber P1 circulates along the cold circulation flow path, as Figures 1 to 3 shown, and so on, until the object to be stored in the variable-temperature chamber P1 can reach the quick-freezing temperature.

[0064] After running for a period of time, when the user needs to process or consume the object to be stored, a thawing instruction is triggered to be generated.

[0065] Thawing stage. The controller 30 receives the thawing instruction and controls the radio-frequency thawing system 42 to work, and radiates radio-frequency energy into the variable-temperature chamber P1 to thaw the object to be stored.

[0066] Refrigeration stage. After thawing the object to be stored, the controller 30 then performs refrigeration control to reduce the temperature of the variable-temperature chamber P1 and maintain it within a set temperature range, and the temperature value of the set temperature range is negative and close to zero.

[0067] It is easy to understand that the user can operate the door body 43 to open the opening and take out the object to be stored after any stage of the thawing stage and the refrigeration stage. Among them, since the set temperature range is lower than 0°C and close to 0°C, therefore, by reducing the temperature of the variable-temperature chamber P1 to the set temperature range during the refrigeration stage, the object to be stored after the refrigeration stage can not only maintain the fresh-keeping state, but also can quickly naturalize after being taken out of the refrigerator. That is, it can achieve microcrystalline fresh-keeping of the object to be stored.

[0068] As can be seen from the foregoing description, in this embodiment, the temperature-changing device 40 integrates the functions of quick-freezing, radio-frequency thawing, and refrigeration. In this way, the object to be stored placed in the temperature-changing chamber P1 can be stored by quick-freezing. The object to be stored after quick-freezing can be thawed by radio-frequency, and the object to be stored after thawing can be stored by refrigeration. That is to say, the temperature in the temperature-changing chamber P1 can span from the quick-freezing temperature to nearly 0°C, with a large temperature span.

[0069] On the one hand, by adopting the quick-freezing method to achieve freezing, the temperature of the object to be stored can quickly pass through the ice crystal formation zone. The temperature-changing device 40 adopts the radio-frequency thawing method to achieve thawing, and the object to be stored is evenly heated. It can be seen that both the freezing process and the thawing process are optimized. Therefore, the quality of the object to be stored after thawing can be greatly improved.

[0070] On the other hand, by adopting refrigeration control after the thawing stage, the temperature of the object to be stored after thawing can also be maintained below 0°C and close to 0°C to maintain the ice crystal state of the object to be stored, so as to prevent the cell membrane of the object to be stored from rupturing. In this way, in the actual application process, when the user fails to pick up the object to be stored that has been thawed in time, not only can the object to be stored be converted to refrigerated storage, so that the object to be stored can still be fresh-keeping, but also the object to be stored can be quickly thawed naturally after being taken out of the refrigerator, so that the user can conveniently eat or process it, improving the user's convenience of use.

[0071] It should be noted that in the related art, when the object to be stored after thawing is not taken out in time, it often turns back to frozen storage and then needs to be thawed again. In contrast, in this embodiment, the object to be stored after thawing is converted to refrigerated storage without repeated freezing and thawing. This is beneficial to avoiding the deterioration of the quality of the object to be stored (for example, food ingredients) caused by repeated thawing, and ensuring that the object to be stored can maintain good quality after one thawing.

[0072] On the other hand, the quick-freezing process, thawing process, and refrigeration process of the object to be stored are all realized in the temperature-changing chamber P1. That is to say, the entire process of storing the object to be stored from quick-freezing to thawing and then to refrigeration does not require a position change. In this way, there is no need for the user to take out the object to be stored at the quick-freezing temperature for thawing, which can avoid increasing the complexity of the operation.

[0073] The above-mentioned radio-frequency thawing system 42 may specifically include a radio-frequency generating device 421 and a radio-frequency transmitting component 422. The radio-frequency generating device 421 provides radio-frequency power for the radio-frequency transmitting component 422. The radio-frequency transmitting component 422 receives the radio-frequency power and is used to emit radio-frequency energy to irradiate the object to be stored in the temperature-changing chamber P1 so as to enable the object to be stored to thaw.

[0074] Among them, the radio frequency generating device 421 can specifically be implemented to include an inductor 4212, a power supply 4211, a power amplifier module, and a control module that are electrically connected. The radio frequency transmitting component 422 can be implemented as a plate electrode, and the plate electrode is electrically connected to the inductor 4212. The power supply 4211 is used to supply power to the power amplifier module, the control module, and the inductor 4212. The control module is configured to be able to control the operating states of the power supply 4211 and the power amplifier module. The power amplifier module is used to generate radio frequency power. After receiving the radio frequency power, the plate electrode radiates radio frequency energy into the variable temperature chamber P1, so that the object to be stored accommodated in the variable temperature chamber P1 is thawed.

[0075] Figure 5 For Figure 1 a three-dimensional schematic diagram of the shielding cylinder 41 of the variable temperature device 40 shown in. In some embodiments of the present disclosure, as Figure 5 shown, a partition 411 can be provided inside the cylinder 41. The partition 411 divides the inside of the cylinder 41 into an installation chamber P2 and a variable temperature chamber P1, and the installation chamber P2 and the variable temperature chamber P1 are isolated from each other. "Isolated" means that the variable temperature chamber P1 and the installation chamber P2 are not connected, and the air in the variable temperature chamber P1 and the air in the installation chamber P2 cannot flow into each other.

[0076] Moreover, the radio frequency generating device 421 can be disposed in the installation chamber P2, and the radio frequency transmitting component 422 can be disposed in the variable temperature chamber P1.

[0077] The inside of the cylinder 41 is divided into the installation chamber P2 and the variable temperature chamber P1, and the installation chamber P2 is used to provide an installation space for the radio frequency generating device 421. At the same time, the variable temperature chamber P1 and the installation chamber P2 are designed to be isolated from each other, which can reduce or even avoid the cold air in the variable temperature chamber P1 from entering the installation chamber P2.

[0078] On the one hand, it can reduce the risk that the radio frequency generating device 421 cannot work properly due to being too cold. On the other hand, when the radio frequency generating device 421 works, it will generate heat. By blocking the variable temperature chamber P1 and the installation chamber P2, the possibility of the cold air coming into contact with the heat generated when the radio frequency generating device 421 works is reduced, so as to reduce the risk of short circuit of the power supply 4211 of the radio frequency generating device 421 caused by the generation of water vapor.

[0079] In some embodiments of the present disclosure, the materials of the cylinder 41, the door body 43, and the partition 411 can all be made of metal. The temperature detection element 60 is arranged outside the variable temperature chamber P1 and contacts the chamber wall of the variable temperature chamber P1.

[0080] For example, the temperature detection element 60 can be arranged outside the cylinder 41, and can be specifically arranged on the bottom plate 415, the top plate 414, or the side plate 416 of the cylinder 41. For another example, the temperature detection element 60 can be arranged in the installation chamber P2 and contact the partition 411.

[0081] By designing the cylinder body 41, the door body 43, and the partition 411 to be made of metal, the cylinder body 41, the door body 43, and the partition 411 can shield radio frequency energy, preventing radio frequency energy from leaking to the outside of the variable temperature chamber P1 to a certain extent. On this basis, the magnetic interference caused by radio frequency energy to the temperature detection element 60 can be reduced to ensure that the temperature detection element 60 can detect normally. Similarly, the magnetic interference caused by radio frequency energy to the power amplifier module can be reduced to facilitate the normal operation of the radio frequency generating device 421. It should be noted that, thanks to the good heat conduction ability of the metal, the temperature detection element 60 provided outside the variable temperature chamber P1 can still achieve accurate detection.

[0082] The number of the above-mentioned temperature detection units is not limited. Multiple temperature detection units can be provided. At this time, the controller 30 can take the temperature detected by one of the temperature detection units as the temperature of the variable temperature chamber P1, and the other temperature detection units can be used as backups. Or, the controller 30 can also take the average value of the temperatures detected by each temperature detection unit as the temperature of the variable temperature chamber P1, which is beneficial to improving the accuracy of temperature acquisition.

[0083] Quick-freezing stage

[0084] In some embodiments of the present disclosure, as Figure 4 shown, the refrigeration device 100 may further include a quick-freezing start switch 61 electrically connected to the controller 30. The controller 30 receives a quick-freezing instruction when the quick-freezing start switch 61 is triggered.

[0085] Among them, the quick-freezing start switch 61 can refer to a physical switch or a touch switch that triggers the corresponding function through touch operations. When the quick-freezing start switch 61 is a physical switch, the quick-freezing start switch 61 can be specifically set on the door body 43 or other positions.

[0086] With such a design, users can conveniently start the quick-freezing function by triggering the quick-freezing start switch 61.

[0087] In the refrigeration device 100 disclosed herein, when receiving a quick-freezing instruction, the controller 30 controls the compressor 21 and the driving fan 50 to operate at full power, so that the temperature of the variable temperature chamber P1 can reach the quick-freezing temperature.

[0088] In some embodiments of the present disclosure, the refrigeration device 100 may further include a quick-freezing duration timer 66, which is electrically connected to the controller 30. When receiving a quick-freezing instruction, while controlling the driving fan 50 to operate, the controller 30 can also control the quick-freezing duration timer 66 to count. When the cumulative counting duration of the quick-freezing duration timer 66 reaches a predetermined duration, the operating power of the compressor 21 and the driving fan 50 is reduced.

[0089] The preset duration is a threshold for characterizing whether the quick-freezing duration is reasonable. The preset duration can be reasonably designed according to experience and actual working conditions. For example, it can be 50 h.

[0090] By setting like this, if the quick-freezing function of the temperature-changing device 40 lasts for the preset duration, the cold quantity delivered to the temperature-changing chamber P1 is reduced, so as to prevent the temperature in the temperature-changing chamber P1 from continuing to drop due to continuous quick-freezing, and the power of the refrigeration device 100 can also be saved.

[0091] Thawing stage

[0092] In some embodiments of the present disclosure, the refrigeration device 100 may further include a thawing switch 62 electrically connected to the controller 30, and the controller 30 receives a thawing instruction when the thawing switch 62 is triggered.

[0093] Among them, the thawing switch 62 may refer to a physical switch or a touch switch that triggers a corresponding function through a touch operation. When the thawing switch 62 is a physical switch, the thawing switch 62 may be specifically disposed on the door body 43 or other positions.

[0094] With such a design, the user can conveniently start the thawing function by triggering the thawing switch 62.

[0095] In some embodiments of the present disclosure, please continue to refer to Figure 4 As shown, the refrigeration device 100 may further include a thawing timer 67, and the thawing timer 67 is electrically connected to the controller 30. When receiving the thawing instruction, the controller 30 controls the thawing timer 67 to count time, and when the cumulative counting duration of the thawing timer 67 reaches a preset duration, controls the radio frequency thawing system 42 to stop working.

[0096] That is to say, the thawing timer 67 is used to count the thawing time. The preset duration is a threshold for characterizing whether the thawing time is reasonable. The preset duration can be reasonably designed according to experience and actual working conditions. For example, it can be 1 h, so that the temperature in the temperature-changing chamber P1 is close to 0 °C after thawing is completed.

[0097] By setting like this, when the cumulative counting duration of the thawing timer 67 reaches the preset duration, the thawing function is stopped, so as to prevent the radio frequency thawing system 42 from continuing to work and causing the temperature in the temperature-changing chamber P1 to be too high, and further reducing the risk that the temperature of the object to be stored after thawing and before the refrigeration stage is too high and may deteriorate.

[0098] Of course, in other embodiments, the controller 30 may also control the radio frequency thawing system 42 to stop working when the temperature detected by the temperature detection element 60 reaches a predetermined thawing temperature. Among them, the predetermined thawing temperature can be designed to be less than and close to 0 °C, for example, -0.2 °C.

[0099] Refrigeration stage

[0100] In some embodiments of the present disclosure, the set temperature range may be, for example, from -2.5°C to -0.7°C.

[0101] Verified by a large amount of experimental data, when the temperature of the object to be stored (e.g., food ingredients) is between -2.5°C and -0.7°C, the temperature of the object to be stored is below zero, which can maintain the ice crystal state of the object to be stored to prevent the cell membrane of the object to be stored from rupturing. In this way, not only can freshness be preserved, but also rapid natural thawing can occur after removal. Based on this, such a design can improve the refrigeration preservation effect, that is, optimize the microcrystalline freshness preservation effect.

[0102] In the following, the set temperature range of -2.5°C to -0.7°C is taken as a representative for detailed introduction.

[0103] In some embodiments of the present disclosure, please continue to refer to Figure 4 As shown, during the refrigeration control process, the controller 30 can determine whether the temperature detected by the temperature detection element 60 is within the set temperature range.

[0104] In response to the temperature detected by the temperature detection element 60 being within the set temperature range, the controller 30 can perform a rewarming operation.

[0105] Among them, the specific implementation steps of the rewarming operation may be to control the driving fan 50 to stop running. Or, the specific implementation steps of the rewarming operation may also be to set the target condensation temperature of the variable temperature chamber P1 to 1°C and control the rotation speed of the driving fan 50 so that the rotation speed of the driving fan 50 decreases. Here, for the sake of easy understanding, it should be noted that the lower the target condensation temperature of the variable temperature chamber P1, the smaller the rotation speed of the driving fan 50 should be to deliver a small amount of cold to the variable temperature chamber P1. The higher the target condensation temperature of the variable temperature chamber P1, the greater the rotation speed of the driving fan 50 should be to deliver a large amount of cold to the variable temperature chamber P1.

[0106] In response to the temperature detected by the temperature detection element 60 exceeding the upper limit value of the set temperature range (i.e., -0.7°C), the controller 30 can perform a cooling operation. During the cooling operation, when the temperature of the variable temperature chamber P1 remains constant within the expected duration and is lower than the critical freezing temperature, the controller 30 returns to perform the rewarming operation. Among them, the critical freezing temperature is within the set temperature range and close to the lower limit value of the set temperature range (i.e., -2.5°C), for example, -2°C.

[0107] It can be understood that the specific implementation steps of the cooling operation are to control the operation of the driving fan 50, and the rotation speed of the driving fan 50 is greater than that of the driving fan 50 corresponding to the temperature recovery operation, so as to increase the cold quantity delivered to the variable temperature chamber P1. That is to say, the cooling operation can refer to controlling the rotation speed of the driving fan 50 to increase. Specifically, if the temperature detected by the temperature detection element 60 exceeds the upper limit value (i.e., -0.7 °C) and exceeds the critical temperature recovery value, the target condensation temperature of the variable temperature chamber P1 is taken as -8 °C, and the rotation speed of the driving fan 50 is controlled. The critical temperature recovery value can be, for example, -0.5 °C. If the temperature detected by the temperature detection element 60 exceeds the upper limit value (i.e., -0.7 °C) of the set temperature range and is less than or equal to the critical temperature recovery value, the target condensation temperature of the variable temperature chamber P1 is taken as -5 °C, and the rotation speed of the driving fan 50 is controlled.

[0108] Among them, the temperature of the variable temperature chamber P1 remaining constant within the expected duration can be used to characterize that the object to be stored reaches the freezing point. That is to say, within the expected duration, when the temperature of the variable temperature chamber P1 remains balanced, it is determined that the object to be stored reaches the freezing point. On this basis, if the temperature of the variable temperature chamber P1 is also lower than the critical freezing temperature, it is confirmed that the object to be stored has frozen, and then the controller 30 stops the cooling operation and instead executes the temperature recovery operation. Generally speaking, the conditions for confirming that the object to be stored has frozen are that the object to be stored reaches the freezing point and the temperature of the variable temperature chamber P1 is lower than the critical freezing temperature. The value range of the expected duration can be, for example, from 25 min to 55 min, such as 40 min.

[0109] Here, the temperature of the variable temperature chamber P1 remaining constant within the expected duration should be understood in a broad sense. For example, it can be understood that the temperature of the variable temperature chamber P1 remains unchanged within the expected duration. Or, it can also be understood that the temperature change range of the variable temperature chamber P1 within the expected duration is between -0.5 °C and +0.5 °C, so that the requirement for the detection accuracy of the temperature detection element 60 can be reduced.

[0110] It can be seen from this that in this embodiment, the driving fan 50 is controlled based on the temperature detected by the temperature detection element 60. When the temperature exceeds the upper limit value of the set temperature range, the cooling operation is executed to lower the temperature of the variable temperature chamber P1. When the object to be stored has frozen, the temperature recovery operation is executed to raise the temperature of the variable temperature chamber P1.

[0111] In this way, the temperature of the variable temperature chamber P1 can be maintained within the set temperature range during the refrigeration stage, which can not only prevent the temperature of the thawed object to be stored from continuing to rise and causing spoilage, but also prevent the temperature of the thawed object to be stored from dropping too low and making it difficult to naturally thaw or refreeze after being taken out.

[0112] In addition, it can also be understood that the critical freezing temperature is designed to be within the set temperature range and close to the lower limit value of the set temperature range. When the temperature of the variable temperature chamber P1 decreases to be about to approach the lower limit value of the set temperature range, the temperature-raising operation is executed by returning, so as to reduce the possibility that the temperature of the variable temperature chamber P1 continues to decrease and is lower than the lower limit value.

[0113] In some embodiments of the present disclosure, as Figure 4 shown, the refrigeration device 100 may further include a first timer 63, and the first timer 63 is electrically connected to the controller 30.

[0114] While executing the temperature-raising operation, the controller 30 also controls the first timer 63 to time, and when the cumulative timing duration of the first timer 63 reaches the first set duration, the temperature-lowering operation is executed.

[0115] That is to say, the first timer 63 is used to time the temperature-raising operation, that is, to accumulate the rising duration of the temperature of the variable temperature chamber P1. The first set duration is used to represent the threshold for whether the temperature-raising duration is reasonable. The first set duration can be reasonably designed according to experience and actual working conditions, for example, it can be 10h.

[0116] By such design, when the cumulative duration of the temperature-raising operation reaches the first set duration and the temperature of the variable temperature chamber P1 still does not exceed the upper limit value of the set temperature range, the temperature-lowering operation is forced to be entered. In this way, the risk that the temperature of the variable temperature chamber P1 rises to exceed the upper limit value due to the too long residence time of the temperature-raising operation can be reduced.

[0117] In some embodiments of the present disclosure, as Figure 4 shown, the refrigeration device 100 may further include a second timer 64, and the second timer 64 is electrically connected to the controller 30.

[0118] After executing the temperature-lowering operation, when the temperature of the variable temperature chamber P1 is lower than the upper limit value of the set temperature range, the controller 30 controls the second timer 64 to start timing. When the cumulative timing duration of the second timer 64 reaches the second set duration, the controller 30 returns to execute the temperature-raising operation.

[0119] That is to say, the second timer 64 is used to time the temperature-lowering operation, that is, to accumulate the time when the temperature of the variable temperature chamber P1 is lower than the upper limit value. The second set duration is used to represent the threshold for whether the temperature-lowering duration is reasonable. The second set duration can be reasonably designed according to experience and actual working conditions, for example, it can be 10h.

[0120] With such a design, when the cumulative duration of the cooling operation reaches the second set duration, a forced warming operation is performed. In other words, if the temperature of the variable temperature chamber P1 still does not meet the condition for returning to the warming operation (i.e., the condition that the item to be stored has been frozen) within a period as long as the second set duration, a forced return to the warming operation is made. In this way, the risk that the temperature of the variable temperature chamber P1 continues to drop below the lower limit value due to the cooling operation staying too long can be reduced.

[0121] In some embodiments of the present disclosure, as Figure 4 shown, the refrigeration device 100 may further include a third timer 65, and the third timer 65 is electrically connected to the controller 30.

[0122] After performing the cooling operation, when the temperature of the variable temperature chamber P1 is lower than the upper limit value of the set temperature range (i.e., -0.7 °C), the controller 30 controls the second timer 64 to start timing. When the cumulative timing duration of the second timer 64 reaches the time threshold, and at the same time the temperature of the variable temperature chamber P1 is not in a constant state within the expected duration and is lower than the lower limit value (i.e., -0.25 °C), a return to the warming operation is made and the third timer 65 is controlled to time.

[0123] After that, when the cumulative timing duration of the third timer 65 reaches the forced warming duration, the controller 30 switches to perform the cooling operation, that is, controls the rotational speed of the driving fan 50 to increase so that the temperature of the variable temperature chamber P1 decreases.

[0124] The fact that the temperature of the variable temperature chamber P1 is not in a constant state within the expected duration means that the item to be stored has not reached the freezing point. That is to say, when the cumulative timing duration of the second timer 64 reaches the time threshold, the item to be stored has still not reached the freezing point and the temperature is lower than the lower limit value, then a forced warming operation is performed to prevent the temperature of the variable temperature chamber P1 from continuing to drop, which may make it difficult for the item to be stored to thaw naturally or be refrozen after being taken out.

[0125] The above time threshold can also be designed to be less than the second set duration, for example, 1 h. It can be understood from this that before confirming whether the condition that the item to be stored has been frozen is still not met, it is first confirmed that the item to be stored has still not reached the freezing point and the temperature is lower than the lower limit value, then a forced warming operation is performed to make the temperature of the variable temperature chamber P1 rise. That is to say, when it is confirmed that the item to be stored has still not reached the freezing point and the temperature is lower than the lower limit value, warming is given priority.

[0126] In this way, the possibility that the temperature of the variable temperature chamber P1 is lower than the lower limit value is minimized as much as possible, and the microcrystal freshness preservation effect is improved.

[0127] The forced rewarming duration is used to characterize the reasonable duration for the temperature of the object to be stored to rise to the set temperature range and approach the upper limit value after the temperature drops below the lower limit value. The forced rewarming duration can be reasonably designed according to experience and actual working conditions. For example, it can be 4h.

[0128] With such a setting, when the temperature drops below the lower limit value, the duration of the rewarming operation needs to reach the forced rewarming duration before the cooling operation can be carried out again. This can make the temperature of the object to be stored rise away from the lower limit value, so that the temperature of the object to be stored is not easily lowered too much when the cooling operation is carried out again, which is beneficial to improving the microcrystalline freshness preservation effect.

[0129] As described above, it is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claimed rights.

Claims

1. A refrigeration device, characterized in that: include: The box body is internally divided into a storage compartment and an air duct compartment, wherein the air duct compartment has a cold cycle inlet and a cold cycle outlet; An evaporator is housed in the air duct room; A temperature-changing device is contained in the storage room; the temperature-changing device comprises a cylinder, a door, and a radio frequency thawing system arranged on the cylinder; a temperature-changing chamber is arranged inside the cylinder, the front side of the temperature-changing chamber has an opening, and the door can open and close the opening; an air inlet and an air return port are arranged on the cavity wall of the temperature-changing chamber; the air inlet is connected to the cold cycle outlet, and the air return port is connected to the cold cycle inlet; A driving fan capable of driving air to flow in the temperature-changing chamber and the air duct chamber, wherein when one of the driving fan and the radio frequency thawing system is in operation, the other stops operating; A temperature detection element capable of detecting the temperature of the temperature-variable chamber in real time; as well as A controller is electrically connected to the radio frequency thawing system, the driving fan and the temperature detection element.

2. The refrigeration equipment according to claim 1, characterized in that: It also includes a thawing timer, which is electrically connected to the controller and is used to time the operating time of the radio frequency thawing system.

3. The refrigeration equipment according to claim 1, characterized in that: The controller is used to control the driving fan to stop or reduce the speed when the temperature detected by the temperature detection element is within a set temperature range, so that the temperature of the variable temperature chamber rises again; the temperature value of the set temperature range is negative and close to zero; The controller is used to control the driving fan to increase the rotation speed when the temperature detected by the temperature detection element exceeds the upper limit of the set temperature range, so that the temperature of the variable temperature chamber decreases.

4. The refrigeration equipment according to claim 3, characterized in that: It also includes a first timer electrically connected to the controller, and the first timer is used to accumulate the temperature recovery time of the variable temperature chamber.

5. The refrigeration equipment according to claim 3, characterized in that: It also includes a second timer electrically connected to the controller, and the second timer is used to count the time when the temperature of the variable temperature chamber is lower than the upper limit value.

6. The refrigeration device according to claim 5, characterized in that: The refrigeration device further includes a third timer electrically connected to the controller. The controller is also used to control the driving fan to stop or reduce the speed when the accumulated timing time of the second timer reaches the time threshold and the temperature of the variable temperature chamber is lower than the lower limit of the set temperature range and is not in a constant state within the expected time, so that the temperature of the variable temperature chamber rises again, and the third timer is used for timing at the same time; The controller is used to control the driving fan to increase the rotation speed when the accumulated timing duration of the third timer reaches the forced temperature recovery duration, so that the temperature of the variable temperature chamber is reduced.

7. The refrigeration device according to any one of claims 3 to 6, characterized in that: The set temperature range is -2.5°C to -0.7°C.

8. The refrigeration device according to any one of claims 1 to 6, characterized in that: It also includes a quick-freezing start switch, which is electrically connected to the controller; And / or, the refrigeration device further includes a thawing switch, and the thawing switch is electrically connected to the controller.

9. The refrigeration device according to any one of claims 1 to 6, characterized in that: The barrel and the door are metal parts, and the temperature detection element is arranged outside the barrel and in contact with the cavity wall of the temperature-changing chamber.

10. The refrigeration equipment according to any one of claims 1 to 6, characterized in that: The cylinder body also has an installation chamber, and the installation chamber is isolated from the temperature-changing chamber; The RF thawing system includes a RF generating device arranged in the installation chamber and a RF transmitting component arranged in the variable temperature chamber, the RF generating device provides power for the RF transmitting component, and the RF transmitting component is used to radiate RF energy into the variable temperature chamber.

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