Split-flow refrigerating system

Abstract

The split-flow refrigerating system comprises a shell, an inner container, a refrigerating module, a power supply modulation module, a conversion module and a control module, and the inner container is provided with an air inlet located in the upper surface of a refrigerating cavity, a first air outlet located in the rear surface of the refrigerating cavity and a second air outlet located in the lower surface of the refrigerating cavity; the conversion module is connected with the first refrigerating part and the second refrigerating part to form at least part of conversion units, the conversion units and the third refrigerating part are connected in series to form at least part of driving branches, the control module can be switched between a first working mode and a second working mode at least according to control instructions, and in the first working mode, the conversion units are connected with the third refrigerating part in series to form at least part of driving branches. In the first working mode, the first refrigerating part and the second refrigerating part are connected in series, in the second working mode, the first refrigerating part and the second refrigerating part are connected in parallel, the first fan and the second fan are controlled to operate at first power, the third fan is controlled to operate at second power, the first power is larger than the second power, the requirement for switching between dehumidification and fresh keeping is met, and energy saving and high efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to a split-flow refrigeration system. Background Technology

[0002] As people's living standards improve, they carry portable refrigerators and other refrigeration equipment when traveling, camping, and engaging in other activities. Refrigerators are versatile; their low-temperature airflow can quickly cool stored dry goods and beverages, removing excess moisture. However, for fresh fruits, vegetables, and meats, which don't require such low temperatures, users are more concerned with preserving their freshness. But existing refrigerators, due to their low-temperature airflow, can actually remove moisture from the surface of these items. Therefore, to meet these requirements, existing refrigerators need to be equipped with wet-pipe heat exchangers. Low-temperature water is sprayed onto the heat exchange pipes, cooling the airflow as it passes through, while the water evaporates into the airflow. However, this structure is complex and consumes a lot of electricity, failing to meet user needs. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a split-flow refrigeration system that meets the needs of switching between dehumidification and preservation, has low deployment cost, simple and portable structure, and is energy-efficient.

[0004] According to a first aspect of the present invention, a split-flow refrigeration system includes: a housing; an inner liner disposed within the housing, the inner liner having a refrigeration cavity, the inner liner having a plurality of shelves distributed from top to bottom within the refrigeration cavity, the inner liner being provided with an air inlet located on the upper surface of the refrigeration cavity, a first air outlet located on the rear surface of the refrigeration cavity, and a second air outlet located on the lower surface of the refrigeration cavity; a refrigeration module, including at least a first return pipe, a second return pipe, and a third return pipe that are independent of each other, the input ends of the first return pipe, the second return pipe, and the third return pipe are all connected to the air inlet, the output ends of the first return pipe and the second return pipe are both connected to the first air outlet, the output end of the third return pipe is connected to the second air outlet, a first refrigeration element and a first fan are disposed within the first return pipe, a second refrigeration element and a second fan are disposed within the second return pipe, and a third refrigeration element and a third fan are disposed within the third return pipe; and a power supply modulation module, wherein the power supply modulation module outputs... The input terminal is used to connect to the power supply, and the power supply modulation module can be controlled to output different drive currents; the conversion module is connected to the first and second cooling components to form at least part of the conversion unit, and the conversion unit is connected in series with the third cooling component to form at least part of the drive branch, and the output terminal of the power supply modulation module is connected to the drive branch; the control module is used to acquire control commands, and the control module is connected to the controlled terminal of the power supply modulation module and the conversion module, respectively. The control module can switch between at least a first working mode and a second working mode according to the control commands. In the first working mode, the drive current output by the power supply modulation module is greater than the current switching threshold, and the first and second cooling components are connected in series. In the second working mode, the drive current output by the power supply modulation module is less than the current switching threshold, and the first and second cooling components are connected in parallel. The first and second fans are controlled to operate at a first power, and the third fan is controlled to operate at a second power, wherein the first power is greater than the second power.

[0005] The shunt refrigeration system according to embodiments of the present invention has at least the following beneficial effects: This invention's split-flow refrigeration system cleverly designs the positions of the air inlet, first air outlet, and second air outlet. Items to be refrigerated are placed on shelves arranged from top to bottom. The first air outlet is located on the rear surface of the refrigeration chamber, and the airflow from the first air outlet flows towards the items to be refrigerated. In the first operating mode, when the user desires dehumidification and cooling of the items, the control module can control the power supply modulation module to output a larger drive current, exceeding the current switch threshold. The first and second refrigeration components are connected in series, as are the third refrigeration component. All three components cool the airflow with approximately equal cooling capacity, condensing moisture in the airflow. Furthermore, as the airflow from the first air outlet passes over the surface of the items, moisture is carried away, achieving dehumidification. In the second operating mode, when the user desires a preservation effect without excessively low cooling temperatures, the control module can control the power supply modulation module to output a smaller drive current, below the current switch threshold. The first and second refrigeration components... The components are connected in parallel and then in series with the third refrigeration component. The driving current passes through the third refrigeration component, and then is shunted to pass through the first and second refrigeration components. The cooling capacity of the third refrigeration component is significantly higher than that of the first and second refrigeration components. The airflow from the first air outlet blows directly onto the items to be refrigerated. However, the condensation effect of the first and second refrigeration components on the water in the airflow is not significant, and they do not remove too much moisture from the surface of the items to be refrigerated. Under the cooling effect of the third refrigeration component, the airflow from the second air outlet has a lower temperature and less moisture. However, the first power of the first and second fans is higher than that of the third fan. Due to the influence of the airflow pressure from the first air outlet, the airflow from the second air outlet does not easily flow over the items to be refrigerated. However, the airflow from the second air outlet can lower the temperature inside the refrigerator cavity to a suitable range. In this mode, compared with the traditional refrigerator air-cooling mode, it can retain the moisture on the surface of the items to be refrigerated to a greater extent. This design meets the needs of dehumidification and preservation switching, has low layout cost, simple structure, is easy to carry, and is energy-efficient.

[0006] According to some embodiments of the present invention, the conversion module includes a first current-limiting switch, a second current-limiting switch, and a unidirectional conduction element. The first end of the first current-limiting switch is connected to the first end of the first cooling element and the first end of the third cooling element, respectively. The output end of the power supply modulation module is connected to the tail end of the third cooling element. The tail end of the first current-limiting switch is connected to the first end of the second cooling element and the cut-off end of the unidirectional conduction element, respectively. The tail end of the first cooling element is connected to the first end of the second current-limiting switch and the conducting terminal of the unidirectional conduction element, respectively. The tail end of the second current-limiting switch is connected to the tail end of the second cooling element and grounded. The unidirectional conduction element allows the driving current to flow from the conducting end to the cut-off end while limiting the driving current to flow from the cut-off end to the conducting end. Both the first current-limiting switch and the second current-limiting switch are provided with a current switching threshold. When the driving current is greater than the current switching threshold, both the first current-limiting switch and the second current-limiting switch are open. When the driving current is less than the current switching threshold, both the first current-limiting switch and the second current-limiting switch are closed.

[0007] According to some embodiments of the present invention, the control module includes a control element disposed on the surface of the housing and a control module. The control module is connected to the control element, the controlled terminal of the power supply modulation module and the conversion module respectively. The control element is used to acquire control commands. The control module determines the magnitude of the drive current output by the power supply modulation module according to the control commands. When the drive current is greater than the current switch threshold, a first working mode is executed. When the drive current is less than the current switch threshold, a second working mode is executed.

[0008] According to some embodiments of the present invention, the control element includes a potential sensing element movably disposed in the housing. Applying force to the potential sensing element causes the sensing part of the potential sensing element to move between adjustment ranges and generate a control command. When the sensing part of the potential sensing element moves from the first end of the adjustment range to the last end of the adjustment range, the control module determines, according to the control command, the drive current output by the power supply modulation module needs to be controlled to increase from small to large.

[0009] According to some embodiments of the present invention, a partition node is provided between the first end and the last end of the adjustment range, a humidification and temperature regulation zone is formed between the first end of the adjustment range and the partition node, and a dehumidification and temperature regulation zone is formed between the partition node and the last end of the adjustment range.

[0010] According to some embodiments of the present invention, in a first operating mode, the first fan, the second fan, and the third fan are all controlled to operate at a third power.

[0011] According to some embodiments of the present invention, the plurality of said shelves divide the refrigeration cavity into a plurality of vertically distributed unit cavities, the first air outlet is elongated and extends along the height direction to face each unit cavity, the second air outlet faces the lowermost unit cavity, and the air inlet faces the uppermost unit cavity.

[0012] According to some embodiments of the present invention, the two sides of the shelf have ventilation openings that connect the upper and lower unit cavities, there are two second air outlets and the two second air outlets are respectively located on the two side walls of the inner liner, and the output end of the third return pipe is respectively connected to the two second air outlets.

[0013] According to some embodiments of the present invention, the housing is provided with an atomizing chamber and a liquid storage chamber. The output ends of the first and second return pipes are both connected to the atomizing chamber. The atomizing chamber is connected to the first air outlet so that the output ends of the first and second return pipes are connected to the first air outlet through the atomizing chamber. The top of the liquid storage chamber is connected to the atomizing chamber through an atomizing port. An atomizing element and a fourth cooling element are provided in the liquid storage chamber. The fourth cooling element is disposed in the liquid storage chamber to cool the liquid in the liquid storage chamber. The atomizing element can atomize the liquid in the liquid storage chamber into mist, and the mist enters the atomizing chamber through the atomizing port. The control module also has a third working mode. In the third working mode, the drive current output by the control power supply modulation module is greater than the current switch threshold. The first and second cooling elements are connected in series. The fourth cooling element is controlled to start cooling the liquid in the liquid storage chamber, and the atomizing element is controlled to start atomizing the liquid in the liquid storage chamber. In the first and second working modes, neither the fourth cooling element nor the atomizing element is started.

[0014] According to some embodiments of the present invention, the first reflux pipe is provided with a first liquid storage tank below the cooling part of the first refrigeration unit, the second reflux pipe is provided with a second liquid storage tank below the cooling part of the second refrigeration unit, and the third reflux pipe is provided with a third liquid storage tank below the cooling part of the first refrigeration unit. The first liquid storage tank, the second liquid storage tank, and the third liquid storage tank are all connected to the liquid storage cavity to transport liquid into the liquid storage cavity.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is a schematic diagram of the inner liner of one embodiment of the shunt refrigeration system of the present invention; Figure 2 for Figure 1 A cross-sectional view AA of the inner liner of one embodiment of the shunt refrigeration system of the present invention; Figure 3 for Figure 1 Cross-sectional view BB of the inner liner of one embodiment of the shunt refrigeration system of the present invention; Figure 4 This is a schematic diagram of the internal structure of the refrigeration module in one embodiment of the shunt refrigeration system of the present invention; Figure 5 This is a block diagram illustrating the control principle of one embodiment of the shunt refrigeration system of the present invention; Figure 6 This is a circuit diagram of the conversion module in one embodiment of the shunt cooling system of the present invention.

[0017] Figure label: Inner liner 100; Refrigeration chamber 110; Air inlet 120; First air outlet 130; Second air outlet 140; Slide rail 150; Shelf 160; Unit cavity 170; Ventilation vent 180; Refrigeration module 200; First return pipe 210; First refrigeration component 220; First heat exchange block 221; Second refrigeration component 230; Third refrigeration component 240; First fan 250; Second fan 260; Third fan 270; Liquid storage chamber 281; Atomizing port 282; Atomizing chamber 283; Atomizing component 284; Fourth refrigeration component 285; First liquid storage tank 286; Return port 287; Power supply modulation module 300; Conversion module 400; First current limiting switch 410; Second current limiting switch 420; One-way conduction component 430; Control module 500; Control component 510; Control module 520. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figures 1 to 6As shown, the split-flow refrigeration system according to a first aspect embodiment of the present invention includes a housing, an inner liner 100, a refrigeration module 200, a power supply modulation module 300, a conversion module 400, and a control module 500. The inner liner 100 has a refrigeration cavity 110, and the inner liner 100 has a plurality of shelves 160 distributed from top to bottom within the refrigeration cavity 110. The inner liner 100 is provided with an air inlet 120 on the upper surface of the refrigeration cavity 110, a first air outlet 130 on the rear surface of the refrigeration cavity 110, and a second air outlet 140 on the lower surface of the refrigeration cavity 110. The refrigeration module 200 includes at least mutually independent The system includes a first return pipe 210, a second return pipe, and a third return pipe. The input ends of the first, second, and third return pipes are all connected to the air inlet 120. The output ends of the first and second return pipes are both connected to the first air outlet 130, and the output end of the third return pipe is connected to the second air outlet 140. The first return pipe 210 contains a first cooling element 220 and a first fan 250; the second return pipe contains a second cooling element 230 and a second fan 260; and the third return pipe contains a third cooling element. The power supply modulation module 300, consisting of 240 and 270, has its input terminal connected to a power supply. The power supply modulation module 300 is controllable to output different drive currents. The conversion module 400 is connected to the first cooling element 220 and the second cooling element 230 to form at least a partial conversion unit. The conversion unit is connected in series with the third cooling element 240 to form at least a partial drive branch. The output terminal of the power supply modulation module 300 is connected to the drive branch. The control module 500 is used to acquire control commands and is connected to both the controlled terminal of the power supply modulation module 300 and the conversion module 400. According to the control command, it can switch between at least a first working mode and a second working mode. In the first working mode, the drive current output by the control power modulation module 300 is greater than the current switching threshold, and the first cooling element 220 and the second cooling element 230 are connected in series. In the second working mode, the drive current output by the control power modulation module 300 is less than the current switching threshold, and the first cooling element 220 and the second cooling element 230 are connected in parallel. The first fan 250 and the second fan 260 are controlled to operate at a first power, and the third fan 270 is controlled to operate at a second power, wherein the first power is greater than the second power.

[0023] The split-flow refrigeration system can adopt the shape of a conventional rectangular refrigerator. The inner liner 100 is made of heat-insulating material and is located inside the outer shell. The gap between the outer shell and the inner liner 100 can be filled with heat-insulating cotton or other materials. The shelves 160 can be made of resin or glass. Figure 2As shown, multiple slide rails 150 can be arranged from top to bottom on both sides of the inner liner 100, and the shelf 160 can be slidably supported on the slide rails 150.

[0024] The first cooling element 220, the second cooling element 230, and the third cooling element 240 can all be semiconductor cooling chips, and can use devices of the same specifications. Under the same current drive, they have approximately the same cooling capacity. Taking the first cooling element 220 as an example, the first cooling element 220 can be embedded in the first return pipe 210. The cooling part of the first cooling element 220 is located in the first return pipe 210, and the cooling part of the first cooling element 220 can be connected to a first heat exchange block 221 inside the first return pipe 210. When the airflow flows in the first return pipe 210, it can contact the first heat exchange block 221 for heat exchange. At the same time, when the temperature of the first heat exchange block 221 is low, the moisture in the airflow can condense into water droplets on the surface of the first heat exchange block 221 and drip down. The heating part of the first cooling element 220 is located outside the first return pipe 210 and is connected to a second heat exchange block, thereby quickly dissipating heat for the first cooling element 220 to ensure stable operation.

[0025] The present invention's split-flow refrigeration system cleverly designs the positions of the air inlet 120, the first air outlet 130, and the second air outlet 140. The items to be refrigerated are placed on shelves 160 arranged from top to bottom. The first air outlet 130 is located on the rear surface of the refrigeration chamber 110, and the airflow from the first air outlet 130 flows towards the items to be refrigerated. In the first operating mode, if the user desires dehumidification and cooling of the items to be refrigerated, the control module 500 can control the power supply modulation module 300 to output a larger drive current. The drive current is greater than the current switch threshold. The first refrigeration element 220 and the second refrigeration element 230 are connected in series. Furthermore, it is connected in series with the third refrigeration element 240. The first refrigeration element 220, the second refrigeration element 230, and the third refrigeration element 240 all cool the airflow with approximately equal cooling capacity. The moisture in the airflow will be condensed, and when the airflow output from the first air outlet 130 passes over the surface of the object to be refrigerated, the moisture will be carried away by the airflow, thus achieving a dehumidification effect. In the second working mode, the user wants the cooling temperature not to be too low, but to achieve a preservation effect. The control module 500 can control the power supply modulation module 300 to output a small drive current. The drive current is less than the current switch threshold. The first refrigeration element 220 and the second refrigeration element 240 are connected in series. When components 30 are connected in parallel and then in series with the third cooling component 240, the driving current passes through the third cooling component 240, and is then shunted to pass through the first cooling component 220 and the second cooling component 230. The cooling capacity of the third cooling component 240 is significantly higher than that of the first cooling component 220 and the second cooling component 230. The airflow output from the first air outlet 130 blows directly onto the item to be refrigerated. However, the condensation effect of the first cooling component 220 and the second cooling component 230 on the water in the airflow is not significant, and they do not remove excessive moisture from the surface of the item to be refrigerated. Under the cooling effect of the third cooling component 240, the temperature of the airflow output from the second air outlet 140 is lower. While the first fan 250 and the second fan 260 operate at higher power than the third fan 270, the airflow from the second air outlet 140 is less likely to flow over the items to be refrigerated due to the airflow pressure from the first air outlet 130. However, the airflow from the second air outlet 140 can lower the temperature inside the refrigerator cavity 110 to a suitable range. In this mode, compared to the traditional refrigerator air-cooling mode, it can retain more moisture on the surface of the items to be refrigerated. This design meets the needs of dehumidification and preservation switching, has low layout cost, simple structure, is easy to carry, and is energy-efficient.

[0026] In some embodiments of the present invention, such as Figure 6As shown, the conversion module 400 includes a first current-limiting switch 410, a second current-limiting switch 420, and a unidirectional conduction element 430. The first end of the first current-limiting switch 410 is connected to the first end of the first cooling element 220 and the first end of the third cooling element 240, respectively. The output end of the power supply modulation module 300 is connected to the tail end of the third cooling element 240. The tail end of the first current-limiting switch 410 is connected to the first end of the second cooling element 230 and the cut-off end of the unidirectional conduction element 430, respectively. The tail end of the first cooling element 220 is connected to the first end of the second current-limiting switch 420. The first current limiting switch 410 and the second current limiting switch 420 are connected to the conducting pole of the unidirectional conducting element 430. The tail end of the second current limiting switch 420 is connected to the tail end of the second cooling element 230 and grounded. The unidirectional conducting element 430 allows the driving current to flow from the conducting end to the cut-off end while limiting the driving current to flow from the cut-off end to the conducting end. Both the first current limiting switch 410 and the second current limiting switch 420 are provided with current switching thresholds. When the driving current is greater than the current switching threshold, both the first current limiting switch 410 and the second current limiting switch 420 are open. When the driving current is less than the current switching threshold, both the first current limiting switch 410 and the second current limiting switch 420 are closed.

[0027] The first current limiting switch 410 and the second current limiting switch 420 can be conventional current limiter chips, electronic control switches, etc., and the unidirectional conduction element 430 can be a diode, thyristor, etc. It can be understood that when the driving current is greater than the current switch threshold, the first current limiting switch 410 and the second current limiting switch 420 are turned off, the first cooling element 220 and the second cooling element 230 are connected in series, and the conversion unit is connected in series with the third cooling element 240. In the driving branch, the driving current flowing through the first cooling element 220, the second cooling element 230 and the third cooling element 240 is approximately the same. If the first cooling element 220, the second cooling element 230 and the third cooling element 240 use devices of the same specifications, the cooling capacity is approximately the same, and the temperature after passing through the first return pipe 210, the second return pipe and the third return pipe is approximately the same.

[0028] When the driving current is less than the current switch threshold, the first current limiting switch 410 and the second current limiting switch 420 close, the first cooling element 220 and the second cooling element 230 are connected in parallel, and the conversion unit is then connected in series with the third cooling element 240. In the driving branch, the third cooling element 240 carries the main circuit current, while the first cooling element 220 and the second cooling element 230 carry the branch current after the main circuit current is shunted. The cooling capacity of the third cooling element 240 is greater than that of the first cooling element 220 and the second cooling element 230, and the airflow temperature after passing through the third return pipe is higher. The temperature is lower, but the moisture content is also relatively lower. The airflow temperature after passing through the first return pipe 210 and the second return pipe is higher, but the moisture content is also relatively higher. The airflow output from the first air outlet 130 passes directly over the surface of the object to be refrigerated, without carrying away too much moisture. At the same time, the airflow pressure prevents the airflow output from the second air outlet 140 from acting excessively on the surface of the object to be refrigerated. However, the airflow output from the first air outlet 130 and the airflow output from the second air outlet 140 can eventually mix in the refrigeration chamber 110, reducing the temperature of the refrigeration chamber 110.

[0029] Specifically, the first fan 250, the second fan 260, and the third fan 270 can use the same specifications of components. Under the first power drive, the first fan 250 and the second fan 260 output a larger air volume, while the third fan 270 outputs a smaller air flow. As a result, the pressure of the air flow output from the first air outlet 130 prevents the air flow output from the second air outlet 140 from acting on the surface of the object to be refrigerated.

[0030] In some embodiments of the present invention, the control module 500 includes a control element 510 disposed on the surface of the housing and a control module 520. The control module 520 is connected to the control element 510, the controlled terminal of the power supply modulation module 300, and the conversion module 400, respectively. The control element 510 is used to acquire control commands. The control module 520 determines the magnitude of the drive current output by the power supply modulation module 300 to be controlled according to the control commands. When the drive current is greater than the current switch threshold, a first working mode is executed. When the drive current is less than the current switch threshold, a second working mode is executed.

[0031] The control module 520 may include an MCU or CPU and its auxiliary circuits. The power supply modulation module 300 may adopt conventional switching power supply circuits, constant current drive circuits, etc. The control module 520 can detect the magnitude of the drive current through the current sampling circuit, and then control the operation of the power supply modulation module 300 to adjust the magnitude of the drive current. It can be understood that the user can use the control unit 510 to set the target temperature in the refrigerator cavity 110. The control module 520 can calculate the magnitude of the drive current based on the target temperature. Generally speaking, the lower the target temperature, the larger the drive current, and the higher the target temperature, the smaller the drive current. A temperature sensor is installed in the refrigerator cavity 110. The control module 520 is connected to the temperature sensor. When the detected temperature has not reached the target temperature, the control module 520 controls the power supply modulation module 300 to output the calculated drive current to drive the refrigeration module 200 to cool. When the detected temperature reaches the target temperature, the control module 520 stops outputting the drive current.

[0032] In some embodiments of the present invention, the control element 510 includes a potential sensing element movably disposed on the housing. Applying force to the potential sensing element can cause the sensing part of the potential sensing element to move between adjustment ranges and generate control commands. When the sensing part of the potential sensing element moves from the first end of the adjustment range to the last end of the adjustment range, the control module 520 determines, according to the control commands, the required drive current output by the power supply modulation module 300 to increase from small to large.

[0033] The potentiometer can be a conventional rotary potentiometer or a sliding potentiometer. Taking a rotary potentiometer as an example, the potentiometer has a pointer indicating the sensing part. The beginning and end of the adjustment range can indicate different target temperatures. When the user drives the potentiometer to rotate, the pointer will point to different target temperatures. The sensing part of the potentiometer moves to the corresponding position and generates a corresponding electrical signal. The control module 520 calculates the corresponding drive current based on the electrical signal.

[0034] In some embodiments of the present invention, the control element 510 may also be an input button, a touch screen, etc., and the user can directly input control commands through the control element 510.

[0035] In some embodiments of the present invention, a partition node is provided between the first and last ends of the adjustment range, a humidifying temperature regulation zone is formed between the first end of the adjustment range and the partition node, and a dehumidifying temperature regulation zone is formed between the partition node and the last end of the adjustment range.

[0036] Understandably, when the sensing unit moves to the partition node, the resulting electrical signal generates a driving current that is approximately equal to the current switching threshold calculated by the control module 520. Therefore, when the sensing unit is located between the beginning of the adjustment range and the partition node, the control module 520 executes the second working mode to cool and moisturize the items to be refrigerated in the refrigeration chamber 110. Furthermore, since the sensing unit can select different target temperatures when moving between the beginning of the adjustment range and the partition node, similarly, when the sensing unit is located between the end of the adjustment range and the partition node, the control module 520 executes the first working mode to cool and dehumidify the items to be refrigerated in the refrigeration chamber 110. Furthermore, since the sensing unit can select different target temperatures when moving between the end of the adjustment range and the partition node, the control module 520 executes the first working mode to cool and dehumidify the items to be refrigerated in the refrigeration chamber 110.

[0037] In some embodiments of the present invention, in the first operating mode, the first fan 250, the second fan 260 and the third fan 270 are all controlled to operate at the third power. Since the cooling capacity of the first refrigeration unit 220, the second refrigeration unit 230 and the third refrigeration unit 240 is approximately the same in the first operating mode, the first fan 250, the second fan 260 and the third fan 270 can guide approximately the same air volume to achieve heat exchange and cooling through the first refrigeration unit 220, the second refrigeration unit 230 and the third refrigeration unit 240 respectively.

[0038] In some embodiments of the present invention, such as Figure 1 , 3 As shown, the multiple shelves 160 divide the refrigeration chamber 110 into multiple vertically distributed unit cavities 170. The first air outlet 130 is elongated and extends along the height direction to face each unit cavity 170. The second air outlet 140 faces the lowermost unit cavity 170, and the air inlet 120 faces the uppermost unit cavity 170.

[0039] There can be multiple first air outlets 130, and these multiple first air outlets 130 are arranged along the left and right directions of the refrigeration cavity 110. Each first air outlet 130 can extend vertically to connect multiple unit cavities 170, so that in the second working mode, the airflow output from the first air outlet 130 can form pressure in each unit cavity 170, limiting the airflow output from the second air outlet 140 to flow near the inner wall of the inner liner 100. The second air outlet 140 is directly opposite the lowermost unit cavity 170. In the second working mode, the airflow output from the second air outlet 140 is colder and easily accumulates in the lowermost unit cavity 170. Driven by the air intake 120, the air in the lowermost unit cavity 170 will flow upward along the inner liner 100 near the inner wall, making it less likely to affect the objects to be refrigerated in the upper unit cavity 170.

[0040] In some embodiments of the present invention, such as Figure 3As shown, the two sides of the shelf 160 have ventilation openings 180 that connect the upper and lower unit cavities 170. There are two second air outlets 140, and the two second air outlets 140 are respectively located on the two side walls of the inner liner 100. The output end of the third return pipe is connected to the two second air outlets 140 respectively.

[0041] Driven by the air intake 120, the airflow from the second air outlet 140 on both sides of the lowest unit cavity 170 can flow upward along the ventilation vent 180 and mix with the airflow from the first air outlet 130 to balance the temperature of each unit cavity 170. Furthermore, the airflow flowing upward from the ventilation vent 180 is less likely to act on the surface of the object to be refrigerated.

[0042] When the user selects a lower target temperature, the control module will dehumidify the refrigeration chamber 110 in the first operating mode. However, the user may need to store some items to be refrigerated under low temperature and high humidity conditions. Therefore, in some embodiments of the present invention, such as Figure 2 As shown, the housing contains an atomizing chamber 283 and a liquid storage chamber 281. The output ends of the first and second return pipes are both connected to the atomizing chamber 283. The atomizing chamber 283 communicates with the first air outlet 130, allowing the output ends of both the first and second return pipes to connect to the first air outlet 130 via the atomizing chamber 283. The top of the liquid storage chamber 281 communicates with the atomizing chamber 283 via an atomizing port 282. The liquid storage chamber 281 contains an atomizing element 284 and a fourth cooling element 285. The fourth cooling element 285 is located within the liquid storage chamber 281 to cool the stored liquid. The liquid in the storage chamber 281 is cooled. The atomizing element 284 can atomize the liquid in the storage chamber 281 into mist, and the mist enters the atomizing chamber 283 through the atomizing port 282. The control module 500 also has a third working mode. In the third working mode, the driving current output by the control power modulation module 300 is greater than the current switch threshold. The first cooling element 220 and the second cooling element 230 are connected in series. The fourth cooling element 285 is controlled to start cooling the liquid in the storage chamber 281, and the atomizing element 284 is controlled to start atomizing the liquid in the storage chamber 281. In the first working mode and the second working mode, neither the fourth cooling element 285 nor the atomizing element 284 is activated.

[0043] Specifically, the liquid storage chamber 281 is usually located below the atomizing chamber 283. The atomizing element 284 can be selected from conventional ultrasonic atomizing sheets. When the atomizing sheet is activated, it vibrates at high frequency to atomize the liquid in the liquid storage chamber 281, and the mist rises from the atomizing port 282 into the atomizing chamber 283. The fourth cooling element 285 can also be selected from semiconductor cooling sheets. The fourth cooling element 285 and the atomizing sheet can each be connected to a semiconductor switching transistor to form a power supply branch. The control module controls the on / off state of the corresponding switching transistors to control the start and stop operation of the fourth cooling element 285 and the atomizing sheet respectively. The fourth cooling element 285 cools the liquid in the liquid storage chamber 281, so the mist can mix with the airflow output from the first return pipe 210 and the second return pipe, further cooling the liquid while increasing the moisture content in the airflow to meet the user's requirements for low temperature and high humidity.

[0044] In some embodiments of the present invention, such as Figure 4 As shown, the first reflux pipe 210 is provided with a first liquid storage tank 286 below the cooling section of the first refrigeration unit 220, the second reflux pipe is provided with a second liquid storage tank below the cooling section of the second refrigeration unit 230, and the third reflux pipe is provided with a third liquid storage tank below the cooling section of the first refrigeration unit 220. The first liquid storage tank 286, the second liquid storage tank, and the third liquid storage tank are all connected to the liquid storage chamber 281 to transport liquid into the liquid storage chamber 281.

[0045] It should be noted that, in Figure 4 The first return pipe 210 is a simplified schematic structure. In the actual product, the pipe should be relatively long to facilitate airflow heat exchange. In addition, the second and third return pipes can adopt similar internal structures. Taking the first return pipe 210 as an example, when the airflow passes through the first heat exchange block 221 of the first cooling component 220 and exchanges heat, moisture may condense into water droplets on the surface of the first heat exchange block. The water droplets gradually drip down and are collected by the first liquid storage tank 286. The first liquid storage tank 286 is provided with a return port 287. The return port 287 can be connected to a hose and communicate with the liquid storage chamber 281, thereby transporting the liquid to the liquid storage chamber 281 for recycling.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A split refrigeration system characterized by, The application relates to a refrigerator, which comprises the following parts: a shell; an inner container arranged in the shell, the inner container having a refrigeration cavity, the inner container having a plurality of shelves distributed from top to bottom in the refrigeration cavity, the inner container being provided with an air inlet on an upper surface of the refrigeration cavity, a first air outlet on a rear surface of the refrigeration cavity and a second air outlet on a lower surface of the refrigeration cavity; a refrigeration module, which comprises at least a first return pipe, a second return pipe and a third return pipe, the input ends of the first return pipe, the second return pipe and the third return pipe being communicated with the air inlet, the output ends of the first return pipe and the second return pipe being communicated with the first air outlet, the output end of the third return pipe being communicated with the second air outlet, the first return pipe being provided with a first refrigeration component and a first fan, the second return pipe being provided with a second refrigeration component and a second fan, and the third return pipe being provided with a third refrigeration component and a third fan; a power supply modulation module, the input end of the power supply modulation module being used for being connected with a power supply, the power supply modulation module being capable of being controlled to output different driving currents; a conversion module, which is connected with the first refrigeration component and the second refrigeration component to form at least part of a conversion unit, the conversion unit being connected with the third refrigeration component in series to form at least part of a driving branch, and the output end of the power supply modulation module being connected with the driving branch; a control module, which is used for acquiring a control instruction, the control module being connected with the controlled end of the power supply modulation module and the conversion module, and the control module being capable of being switched between at least a first working mode and a second working mode according to the control instruction, wherein, in the first working mode, the driving current output by the power supply modulation module is greater than a current switching threshold, the first refrigeration component and the second refrigeration component are connected in series, in the second working mode, the driving current output by the power supply modulation module is less than the current switching threshold, the first refrigeration component and the second refrigeration component are connected in parallel, the first fan and the second fan are controlled to operate at a first power, and the third fan is controlled to operate at a second power, wherein the first power is greater than the second power.

2. The split refrigeration system of claim 1, wherein: The conversion module comprises a first current-limiting switch, a second current-limiting switch and a unidirectional conducting component, the first end of the first current-limiting switch is connected with the first end of the first refrigeration component and the first end of the third refrigeration component, the output end of the power supply modulation module is connected with the second end of the third refrigeration component, the second end of the first current-limiting switch is connected with the first end of the second refrigeration component and the cutoff end of the unidirectional conducting component, the second end of the first refrigeration component is connected with the first end of the second current-limiting switch and the conducting end of the unidirectional conducting component, and the second end of the second current-limiting switch is connected with the second end of the second refrigeration component and grounded, wherein the unidirectional conducting component allows the driving current to flow from the conducting end to the cutoff end and restricts the driving current to flow from the cutoff end to the conducting end, the first current-limiting switch and the second current-limiting switch are both provided with the current switching threshold, when the driving current is greater than the current switching threshold, the first current-limiting switch and the second current-limiting switch are both disconnected, and when the driving current is less than the current switching threshold, the first current-limiting switch and the second current-limiting switch are both connected.

3. The split refrigeration system of claim 2, wherein: The control module is connected with the control unit, the controlled end of the power supply modulation module and the conversion module, the control unit is used for obtaining a control instruction, and the control module obtains a required control driving current output by the power supply modulation module according to the control instruction; when the driving current is greater than a current switching threshold, the first working mode is executed; and when the driving current is less than the current switching threshold, the second working mode is executed.

4. The split refrigeration system of claim 3, wherein: The control unit includes a potential sensing member movably arranged on the shell, and force applied to the potential sensing member can make the sensing part of the potential sensing member move between the adjustment intervals and form a control instruction; when the sensing part of the potential sensing member moves from the beginning of the adjustment interval to the end of the adjustment interval, the control module obtains a required control driving current output by the power supply modulation module from small to large according to the control instruction.

5. The split refrigeration system of claim 4, wherein: The beginning and the end of the adjustment interval are provided with a partition node, a humidifying and temperature adjusting area is formed between the beginning of the adjustment interval and the partition node, and a dehumidifying and temperature adjusting area is formed between the partition node and the end of the adjustment interval.

6. The split refrigeration system of claim 1, wherein: In the first working mode, the first air fan, the second air fan and the third air fan are all controlled to operate at the third power.

7. The split refrigeration system of claim 1, wherein: The plurality of layer plates divide the refrigeration cavity into a plurality of unit layer cavities arranged in an up-down direction, the first air outlet is in a strip shape and extends along a height direction to face each unit layer cavity, the second air outlet faces the lowermost unit layer cavity, and the air inlet faces the uppermost unit layer cavity.

8. The split refrigeration system of claim 7, wherein: The two side edges of the layer plate have air vents communicating the unit layer cavities arranged in the up-down direction, the second air outlet has two second air outlets, and the two second air outlets are respectively located on the two side walls of the inner container.

9. The split refrigeration system of claim 1, wherein: The shell is provided with an atomization cavity and a liquid storage cavity, the output ends of the first return pipe and the second return pipe are connected with the atomization cavity, the atomization cavity is connected with the first air outlet, so that the output ends of the first return pipe and the second return pipe are connected with the first air outlet through the atomization cavity, the top of the liquid storage cavity is connected with the atomization cavity through an atomization port, the liquid storage cavity is provided with an atomization member and a fourth refrigeration member, the fourth refrigeration member is arranged in the liquid storage cavity to refrigerate the liquid in the liquid storage cavity, the atomization member can atomize the liquid in the liquid storage cavity into mist, and the mist enters the atomization cavity through the atomization port, the control module obtains a required control driving current output by the power supply modulation module from small to large according to the control instruction when the sensing part of the potential sensing member moves from the beginning of the adjustment interval to the end of the adjustment interval, the driving current output by the power supply modulation module is greater than the current switching threshold in the third working mode, the first refrigeration member and the second refrigeration member are connected in series, the fourth refrigeration member is controlled to start refrigerating the liquid in the liquid storage cavity, and the atomization member is controlled to start atomizing the liquid in the liquid storage cavity, and the fourth refrigeration member and the atomization member are not started in the first working mode and the second working mode.

10. The split refrigeration system of claim 9, wherein: The first return pipe is provided with a first liquid storage groove below the refrigeration part of the first refrigeration device, the second return pipe is provided with a second liquid storage groove below the refrigeration part of the second refrigeration device, and the third return pipe is provided with a third liquid storage groove below the refrigeration part of the first refrigeration device. The first liquid storage groove, the second liquid storage groove and the third liquid storage groove are all connected to the liquid storage cavity to deliver liquid into the liquid storage cavity.

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