Refrigerating and freezing device and control method thereof

Abstract

The present application relates to a refrigeration and freezing device and a control method thereof, the refrigeration and freezing device comprising multiple storage compartments, each of which is provided with an air supply damper. The control method comprises: obtaining the measured temperature in each storage compartment and the evaporator temperature of the evaporator when all the storage compartments are in a non-refrigeration state; entering an auxiliary refrigeration mode when the difference between the measured temperature and the evaporator temperature of any storage compartment is greater than or equal to a first preset temperature difference value; in the auxiliary refrigeration mode, starting the air supply fan and obtaining the number of target storage compartments; when the number of target storage compartments is more than two, obtaining the set temperature of each target storage compartment; and opening the air supply damper corresponding to the target storage compartment in turn according to the priority order from low to high of the set temperature, which realizes the full utilization of the residual cold of the evaporator and does not affect the preservation effect of the target storage compartment with a higher set temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration and freezing technology, and in particular, to a refrigeration and freezing device and a control method thereof. BACKGROUND

[0002] In daily life, people mainly use refrigerators to store and preserve food. Common refrigerators in the prior art include traditional two-door refrigerators, T-shaped refrigerators, French-style refrigerators, side-by-side refrigerators, and the like. In order to achieve accurate partition storage of various types of food, multiple storage compartments are usually provided in the refrigerator, and at least part of the storage compartments are provided with cold quantity by the same evaporator. When the multiple storage compartments do not need refrigeration, the refrigerant will not flow through the evaporator, and the air supply fan is in a stopped state. However, after the storage compartments stop refrigeration, a large amount of cold quantity will be left on the evaporator, and the cold quantity will be naturally dissipated, resulting in waste. SUMMARY

[0003] One object of the first aspect of the present application is to overcome at least one defect of the prior art, and to provide a control method of a refrigeration and freezing device capable of effectively utilizing the residual cold quantity of the evaporator.

[0004] Another object of the first aspect of the present application is to avoid adversely affecting the preservation effect of the storage compartments.

[0005] An object of the second aspect of the present application is to provide a refrigeration and freezing device capable of effectively utilizing the residual cold quantity of the evaporator.

[0006] According to the first aspect of the present application, a control method of a refrigeration and freezing device is provided, the refrigeration and freezing device having multiple storage compartments for storing articles, the multiple storage compartments being provided with cold quantity by a cooling air flow cooled by a second cooling chamber, the second cooling chamber being provided with an evaporator and an air supply fan, and each of the storage compartments being provided with an air supply damper corresponding thereto; and the control method comprising:

[0007] acquiring a measured temperature in each of the storage compartments and an evaporator temperature of the evaporator when the multiple storage compartments are in a non-refrigeration state;

[0008] entering an auxiliary refrigeration mode when a difference between the measured temperature of any of the storage compartments and the evaporator temperature is greater than or equal to a first preset temperature difference value, wherein the storage compartment with a difference between the measured temperature and the evaporator temperature greater than or equal to the first preset temperature difference value is a target storage compartment;

[0009] starting the air supply fan in the auxiliary refrigeration mode, and acquiring the number of the target storage compartments;

[0010] When the number of the target storage compartments is more than two, obtaining a set temperature of each of the target storage compartments;

[0011] alternately opening the supply air damper corresponding to the target storage compartment according to a priority order from low to high of the set temperature.

[0012] Optionally, the step of alternately opening the supply air damper corresponding to the target storage compartment according to a priority order from low to high of the set temperature comprises:

[0013] opening the supply air damper corresponding to the target storage compartment with the highest priority;

[0014] obtaining a measured temperature in the target storage compartment with the highest priority;

[0015] when the measured temperature in the target storage compartment with the highest priority meets a preset condition, closing the supply air damper corresponding to the target storage compartment with the highest priority, and opening the supply air damper corresponding to the target storage compartment with the next priority, and so on;

[0016] when the measured temperature in the target storage compartment with the lowest priority meets the preset condition, closing the supply air damper corresponding to the target storage compartment with the lowest priority, and exiting the auxiliary refrigeration mode.

[0017] Optionally, the preset condition comprises any one or more of the following:

[0018] the measured temperature in the target storage compartment reaches a set shutdown point temperature thereof;

[0019] a difference between the measured temperature in the target storage compartment and a current evaporator temperature of the evaporator is less than the first preset temperature value.

[0020] Optionally, when the number of the target storage compartments is only one, the control method further comprises:

[0021] opening the supply air damper corresponding to the target storage compartment.

[0022] Optionally, the plurality of storage compartments comprises a refrigeration compartment having a refrigeration storage environment, and a first variable-temperature compartment selectively having a refrigeration storage environment or a freezing storage environment, a return air flow in the refrigeration compartment and the first variable-temperature compartment returns to the second cooling chamber through a same return air pipe, and a baffle is arranged in the return air pipe; and the control method further comprises:

[0023] when the supply air damper corresponding to the refrigeration compartment is opened, controlling the baffle to rotate to a second state of conducting the refrigeration compartment and the return air pipe and blocking the first variable-temperature compartment and the return air pipe;

[0024] controlling the baffle to rotate to a first state of conducting the first temperature changing compartment and the return air duct and blocking the refrigeration compartment and the return air duct when the air supply damper corresponding to the first temperature changing compartment is opened.

[0025] Optionally, the control method further comprises:

[0026] when the refrigeration compartment and the first temperature changing compartment both need refrigeration and the first temperature changing compartment is in a freezing gear, obtaining a measured temperature in the refrigeration compartment; and

[0027] when the measured temperature in the refrigeration compartment reaches a preset temperature value between a set-off temperature and a set-on temperature, controlling the refrigeration compartment and the first temperature changing compartment to alternately refrigerate.

[0028] Optionally, the step of controlling the refrigeration compartment and the first temperature changing compartment to alternately refrigerate comprises:

[0029] alternately executing a refrigeration refrigeration program and a first temperature changing refrigeration program according to a preset time period; wherein

[0030] in the refrigeration refrigeration program, the air supply damper corresponding to the refrigeration compartment is controlled to be opened, the air supply damper corresponding to the first temperature changing compartment is controlled to be closed, and the baffle is adjusted to the second state, and the refrigeration refrigeration program is executed for the first temperature changing refrigeration program after lasting a first preset time length;

[0031] in the first temperature changing refrigeration program, the air supply damper corresponding to the refrigeration compartment is controlled to be closed, the air supply damper corresponding to the first temperature changing compartment is controlled to be opened, and the baffle is adjusted to the first state, and the first temperature changing refrigeration program is executed for the refrigeration refrigeration program after lasting a second preset time length.

[0032] Optionally, after controlling the refrigeration compartment and the first temperature changing compartment to alternately refrigerate, the control method further comprises:

[0033] obtaining an actual switching frequency of the refrigeration compartment and the first temperature changing compartment alternately refrigerating;

[0034] when the actual switching frequency reaches a preset switching frequency, increasing the rotating speed of the air supply fan.

[0035] Optionally, after controlling the refrigeration compartment and the first temperature changing compartment to alternately refrigerate, the control method further comprises:

[0036] When any one of the refrigeration compartment and the first temperature-changing compartment reaches its set-off point temperature, the refrigeration to it is stopped, and the refrigeration to the other compartment which does not reach its set-off point temperature is continuously carried out until the refrigeration to the other compartment is stopped after the other compartment reaches its set-off point temperature.

[0037] According to a second aspect of the present application, the present application further provides a refrigeration and freezing device, comprising:

[0038] a cabinet, which is internally defined with a plurality of storage compartments for storing articles, and each of the plurality of storage compartments is provided with cold energy by a cooling air flow which is cooled by a second cooling chamber, and the second cooling chamber is internally provided with an evaporator and a supply fan, and each of the storage compartments is correspondingly provided with a supply damper;

[0039] a temperature detection assembly, which is used for detecting a measured temperature in each of the storage compartments and an evaporator temperature of the evaporator; and

[0040] a control device, which comprises a processor and a memory, the memory is stored with a machine-executable program, and the machine-executable program is used for implementing the control method according to any one of the above-mentioned schemes when executed by the processor.

[0041] The refrigeration and freezing device of the present application has a plurality of storage compartments, and each of the storage compartments is correspondingly provided with a supply damper. When the plurality of storage compartments are in a non-refrigeration state, and the measured temperature of at least one of the storage compartments is higher than a first preset temperature of the evaporator temperature, the auxiliary refrigeration mode is entered, in which the supply fan which is originally stopped is started, and the supply damper corresponding to the target storage compartment whose measured temperature is higher than the first preset temperature of the evaporator temperature is opened, so that the air flow circulation is realized between the second cooling chamber where the evaporator is located and the target storage compartment, the air flow in circulation continuously takes away the residual cold energy on the evaporator and inputs the target storage compartment, so that the auxiliary refrigeration of the target storage compartment is realized, the residual cold energy on the evaporator is fully utilized, the cold energy utilization is improved, and the energy waste is avoided.

[0042] More importantly, the application opens the air supply damper corresponding to the target storage compartment in the order of priority from low to high of the set temperature, i.e. opens the air supply damper corresponding to the target storage compartment with lower set temperature first and then opens the air supply damper corresponding to the target storage compartment with higher set temperature. In this way, the air circulation between the target storage compartment with lower set temperature and the second cooling chamber is performed first, so that the cold quantity remaining in the evaporator is delivered to the target storage compartment with lower set temperature first. The evaporator temperature is lower when it is switched from the refrigeration state to the non-refrigeration state, and the cold quantity is more, so that the target storage compartment with lower set temperature can be cooled properly and refrigerated. As the measured temperature in the target storage compartment with lower set temperature decreases continuously and the evaporator temperature increases continuously, the evaporator can no longer provide cold quantity for the target storage compartment with lower set temperature, but can still provide cold quantity for the target storage compartment with higher set temperature. At this time, the air supply damper corresponding to the target storage compartment with next priority is switched to be opened, so that the cold quantity can be continuously provided for the target storage compartment with higher set temperature, the residual cold quantity of the evaporator is fully utilized in different zones, and the preservation effect of the target storage compartment with higher set temperature is not affected. In addition, the temperature in the target storage compartment with lower set temperature can be prevented from rising. In the above process, the temperature of the evaporator can be gradually increased by using the heat of each target storage compartment. When the air circulation is performed between the target storage compartment with measured temperature greater than zero and the second cooling chamber, the evaporator can be defrosted by using the return air flow in the target storage compartment, and multiple beneficial technical effects are achieved.

[0043] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0044] Some embodiments of the present application will now be described in detail in connection with the accompanying drawings, in which:

[0045] Figure 1 is a schematic structural view of a refrigerating and freezing device according to an embodiment of the present application;

[0046] Figure 2 is a schematic sectional view of a refrigerating and freezing device according to an embodiment of the present application;

[0047] Figure 3 is a schematic flow chart of a control method of a refrigerating and freezing device according to an embodiment of the present application;

[0048] Figure 4 、 Figure 5 andFigure 6 These are all schematic structural diagrams of return air ducts and related structures according to an embodiment of the present invention;

[0049] Figure 7 This is a schematic structural block diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention. Detailed Implementation

[0050] This invention first provides a control method for a refrigeration and freezing device. Figure 1 This is a schematic structural diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention. Figure 2 This is a schematic cross-sectional view of a refrigeration and freezing apparatus according to an embodiment of the present invention. The refrigeration and freezing apparatus has multiple storage compartments for storing articles. Each storage compartment is supplied with cooling airflow after being cooled by a second cooling chamber 152. The second cooling chamber 152 is equipped with an evaporator 32 and a blower 31. Each storage compartment is correspondingly provided with a blower damper. Specifically, the blower is used to drive airflow to the multiple storage compartments, and the blower damper is used to selectively allow or prevent the cooling airflow from flowing into its corresponding storage compartment.

[0051] The control method of the present invention is based on a refrigeration and freezing device having the above-described structure.

[0052] Figure 3 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to an embodiment of the present invention. See also Figure 3 The control method of the present invention includes:

[0053] Step S10: When all storage compartments are in a non-cooling state, obtain the measured temperature inside each storage compartment and the evaporator temperature of the evaporator.

[0054] Step S20: When the difference between the measured temperature of any storage room and the evaporator temperature is greater than or equal to the first preset temperature difference value, the auxiliary cooling mode is entered; wherein, the storage room whose difference between the measured temperature and the evaporator temperature is greater than or equal to the first preset temperature difference value is the target storage room;

[0055] Step S30: In auxiliary cooling mode, start the air supply fan 31 and obtain the number of target storage rooms;

[0056] Step S40: Determine whether the number of target storage rooms is two or more; if so, proceed to step S50.

[0057] Step S50: Obtain the set temperature of each target storage room;

[0058] Step S60: Open the air supply dampers corresponding to the target storage room alternately according to the priority order of the set temperature from low to high.

[0059] When multiple storage compartments are in a non-cooling state, the evaporator temperature remains low, with a significant amount of residual cold energy. When the measured temperature of a storage compartment is higher than the evaporator temperature by a certain margin, the evaporator can provide cooling for that compartment. Therefore, this invention enters an auxiliary cooling mode when the measured temperature of at least one storage compartment is higher than a first preset evaporator temperature. In this mode, the previously stopped air supply fan 31 is started, and the air supply damper corresponding to the target storage compartment with a measured temperature higher than the first preset evaporator temperature is opened. This achieves airflow circulation between the second cooling chamber 152 (where the evaporator is located) and the target storage compartment. The circulating airflow continuously carries away the residual cold energy from the evaporator and inputs it into the target storage compartment, thus achieving the purpose of auxiliary cooling for the target storage compartment. This fully utilizes the residual cold energy on the evaporator, improves cold energy utilization, and avoids energy waste.

[0060] The inventors recognized that the set temperatures of multiple target storage compartments are not entirely the same, and may even be completely different. For example, the set temperature of the refrigerator compartment and the variable-temperature compartment in refrigerator mode is relatively high, while the set temperature of the variable-temperature compartment or the freezer compartment in freezer mode is lower. During non-cooling periods, although no refrigerant flows through the evaporator and the evaporator temperature is relatively low, directly inputting the residual cold energy from the evaporator into the refrigerator compartment or the variable-temperature compartment in refrigerator mode may cause the temperature of the refrigerator compartment or the variable-temperature compartment to drop below zero, thereby freezing and damaging the food.

[0061] Therefore, this invention alternately opens the air supply dampers corresponding to the target storage compartments in a priority order from low to high set temperature. Specifically, the air supply dampers corresponding to the target storage compartments with lower set temperatures are opened first, followed by the air supply dampers corresponding to the target storage compartments with higher set temperatures. This allows airflow circulation between the target storage compartment with the lower set temperature and the second cooling chamber 152, thereby transferring the residual cooling energy from the evaporator to the target storage compartment with the lower set temperature. Since the evaporator temperature is low and the cooling energy is relatively large when switching from cooling to non-cooling mode, the target storage compartment with the lower set temperature can be appropriately cooled, thus assisting in its cooling process. As the measured temperature in the target storage compartment with the lower set temperature continues to decrease while the evaporator temperature continues to increase, the evaporator can no longer provide cooling to the target storage compartment with the lower set temperature, but it can still provide cooling to the target storage compartment with the higher set temperature. At this point, switching to opening the air supply damper corresponding to the next priority target storage compartment can continue to provide cooling to the target storage compartment with the higher set temperature. This achieves full utilization of the residual cooling capacity of the evaporator in different zones, and will not affect the preservation effect of the target storage compartment with the higher set temperature. It can also prevent the temperature in the target storage compartment with the lower set temperature from rising again.

[0062] In the above process, the temperature of the evaporator can be raised step by step by utilizing the heat from each target storage chamber, which is beneficial for melting the frost on the evaporator. Furthermore, when airflow circulates between the target storage chamber with a measured temperature greater than zero and the second cooling chamber 152, the return airflow in the target storage chamber can also be used to defrost the evaporator, achieving multiple beneficial technical effects.

[0063] In some embodiments, step S60, which involves alternately opening the air supply dampers corresponding to the target storage compartments according to a priority order of set temperatures from low to high, may specifically include:

[0064] Open the air supply damper corresponding to the highest priority target storage room;

[0065] Obtain the measured temperature inside the highest priority target storage room;

[0066] When the measured temperature in the highest priority target storage room meets the preset conditions, the air supply damper corresponding to the highest priority target storage room is closed, and the air supply damper corresponding to the next priority target storage room is opened, and so on.

[0067] When the measured temperature in the lowest priority target storage room meets the preset conditions, the air supply damper corresponding to the lowest priority target storage room is closed, and the auxiliary cooling mode is exited.

[0068] Furthermore, the aforementioned preset conditions may include any one or more of the following:

[0069] The measured temperature inside the target storage room reaches its set shutdown temperature.

[0070] The difference between the measured temperature inside the target storage room and the current evaporator temperature is less than the first preset temperature value.

[0071] When the measured temperature inside the target storage room reaches its set shutdown temperature, continuing to supply air into it may cause the temperature to drop further, deviating significantly from the set temperature and affecting the storage effect of the food inside. Therefore, when the measured temperature inside the target storage room reaches its set shutdown temperature, the air supply damper corresponding to that target storage room is closed to provide auxiliary cooling for the next level of target storage room. This design is very reasonable.

[0072] When the difference between the measured temperature inside the target storage room and the current evaporator temperature is less than the first preset temperature value, it indicates that the measured temperature inside the target storage room is not significantly different from the current evaporator temperature. Even if airflow from the second cooling chamber 152 is introduced into the target storage room, it will not bring significant cooling input to the target storage room, and may even cause the temperature of the target storage room to rise. Therefore, closing the air supply damper corresponding to the target storage room at this time to provide auxiliary cooling for the next level target storage room is a very reasonable design.

[0073] In some embodiments, when the number of target storage compartments is only one, the control method further includes:

[0074] Open the air supply door corresponding to the target storage room.

[0075] That is, when the judgment result of step S40 is negative, proceed to step S70: open the air supply door corresponding to the target storage room.

[0076] In some embodiments, the plurality of storage compartments include a refrigerated compartment 12 having a refrigerated storage environment and a first variable temperature compartment 13 having either a refrigerated storage environment or a frozen storage environment. The return airflow in the refrigerated compartment 12 and the first variable temperature compartment 13 returns to the second cooling compartment 152 through the same return air duct 20, and the return air duct 20 is provided with a baffle plate 21. Figure 4 , Figure 5 and Figure 6 These are all schematic structural diagrams of return air ducts and related structures according to an embodiment of the present invention. Figure 4 , Figure 5 and Figure 6 In the middle, the wind deflector 21 is in different states.

[0077] In these embodiments, the control method of the present invention further includes:

[0078] When the air supply damper corresponding to the cold storage compartment 12 is opened, the control baffle 21 rotates to the second state, which connects the cold storage compartment 12 and the return air duct 20 while blocking the first variable temperature compartment 13 and the return air duct 20 (see...). Figure 4 );

[0079] When the air supply damper corresponding to the first temperature-controlled compartment 13 is opened, the control baffle 21 rotates to the first state, which connects the first temperature-controlled compartment 13 and the return air duct 20 while blocking the refrigeration compartment 12 and the return air duct 20 (see...). Figure 5 ).

[0080] When the air supply damper corresponding to the refrigerator compartment 12 is opened, the baffle plate 21 is adjusted to the second state, allowing only the return airflow from the refrigerator compartment 12 to flow into the return air duct 20, and the connection between the first variable temperature compartment 13 and the return air duct 20 is blocked, preventing the return airflow from the return air duct 20 from flowing into the first variable temperature compartment 13. When the air supply damper corresponding to the first variable temperature compartment 13 is opened, only the return airflow from the first variable temperature compartment 13 is allowed to flow into the return air duct 20, and the connection between the refrigerator compartment 12 and the return air duct 20 is blocked, preventing the return airflow from the return air duct 20 from flowing into the refrigerator compartment 12.

[0081] As can be seen, by setting a baffle plate 21 in the return air duct 20 and controlling it reasonably, the present invention can effectively avoid the problem of cross-ventilation between the cold storage room 12 and the first variable temperature room 13 due to the use of the same return air duct 20 for return air. This avoids large temperature fluctuations in the cold storage room 12 and the first variable temperature room 13, and makes it less likely for condensation or frost to form in the cold storage room 12 and the first variable temperature room 13.

[0082] It is understandable that the opening of the air supply damper corresponding to the refrigeration compartment 12 includes two situations: during the normal cooling period of the refrigeration compartment 12 and during the non-cooling period, the evaporator is used to assist in the cooling of the refrigeration compartment 12. Similarly, the opening of the air supply damper corresponding to the first variable temperature compartment 13 includes two situations: during the normal cooling period of the first variable temperature compartment 13 and during the non-cooling period, the evaporator is used to assist in the cooling of the first variable temperature compartment 13.

[0083] Furthermore, when both the cold storage compartment 12 and the small variable temperature compartment 13 are in a cooling state, the air supply damper corresponding to the cold storage compartment 12 and the air outlet damper corresponding to the cold storage compartment 12 are both opened. At this time, the baffle plate 21 can be controlled to rotate to the third state, which connects the first variable temperature compartment 13 and the return air duct 20 and also connects the cold storage compartment 12 and the return air duct 20 (see...). Figure 6 This is to ensure normal air return in the cold storage compartment 12 and the first variable temperature compartment 13.

[0084] The inventors recognized that when both the refrigerator compartment 12 and the first variable-temperature compartment 13 require refrigeration, return airflow flows into the return air duct 20 from both compartments. However, when the first variable-temperature compartment 13 is set to the freezing position, its temperature is lower, resulting in lower temperature return airflow flowing into the return air duct 20. Conversely, the temperature in the refrigerator compartment 12 is relatively higher, leading to slightly higher temperature return airflow flowing into the return air duct 20. This significant temperature difference between the two return airflows creates a temperature alternation phenomenon when passing through the return air duct 20, easily causing condensation or even frost formation within the duct.

[0085] Therefore, in some embodiments, the refrigeration and freezing apparatus 1 of the present invention further includes:

[0086] When both the cold storage compartment 12 and the first variable temperature compartment 13 require cooling, and the first variable temperature compartment 13 is in the freezing position, the measured temperature inside the cold storage compartment 12 is obtained; and

[0087] When the measured temperature in the cold storage compartment 12 reaches the preset temperature value between its set shutdown point temperature and set startup point temperature, the cold storage compartment 12 and the first variable temperature compartment 13 are controlled to alternately cool.

[0088] The present invention further controls the alternating cooling of the refrigerator compartment 12 and the first variable temperature compartment 13 when the measured temperature in the refrigerator compartment 12 is at a preset temperature value between its set shutdown point temperature and set startup point temperature. That is, the air supply damper corresponding to the refrigerator compartment 12 and the air supply damper corresponding to the first variable temperature compartment 13 are set to open and close alternately. In other words, the air supply damper corresponding to the refrigerator compartment 12 and the air supply damper corresponding to the first variable temperature compartment 13 do not open at the same time, and the refrigerator compartment 12 and the first variable temperature compartment 13 do not cool at the same time. Instead, the air supply damper corresponding to the refrigerator compartment 12 is opened for a period of time and then switches. The air supply damper corresponding to the first variable temperature chamber 13 is opened, and the refrigerator chamber 12 and the first variable temperature chamber 13 are cooled alternately and separately. On the one hand, the intermittent input of cold energy will not have a significant impact on the cooling of the refrigerator chamber 12 and the first variable temperature chamber 13. On the other hand, when the refrigerator chamber 12 is cooled, the return airflow in the refrigerator chamber 12 returns to the second cooling chamber through the return air duct 20. The relatively high temperature of the return airflow in the refrigerator chamber 12 can be used to melt the frost that may be generated inside the return air duct 20, thereby avoiding severe icing or frosting in the return air duct 20.

[0089] In some embodiments, the step of controlling the alternating cooling of the cold storage compartment 12 and the first variable temperature compartment 13 includes:

[0090] The refrigeration and first variable temperature refrigeration programs are executed alternately according to a preset time cycle.

[0091] In the refrigeration program, the air supply damper corresponding to the refrigeration compartment 12 is opened, the air supply damper corresponding to the first variable temperature compartment 13 is closed, and the baffle plate 21 is adjusted to the second state to achieve airflow circulation between the refrigeration compartment 12 and the second cooling compartment 152, thereby ensuring normal cooling of the refrigeration compartment 12, and using the return air in the refrigeration compartment 12 to defrost the return air duct 20. After the refrigeration program continues for a first preset time, the first variable temperature cooling program is executed.

[0092] In the first variable-temperature refrigeration program, the air supply damper corresponding to the refrigeration compartment 12 is closed, the air supply damper corresponding to the first variable-temperature compartment 13 is opened, and the baffle plate 21 is adjusted to the first state to achieve airflow circulation between the first variable-temperature compartment 13 and the second cooling chamber 152, thereby providing normal cooling for the first variable-temperature compartment 13. After the first variable-temperature refrigeration program continues for a second preset time, the refrigeration program is executed.

[0093] In some embodiments, after controlling the alternating cooling of the refrigerated compartment 12 and the first variable temperature compartment 13, the control method of the present invention further includes:

[0094] Obtain the actual number of switching times between the alternating refrigeration of the cold storage compartment 12 and the first variable temperature compartment 13;

[0095] When the actual number of switching operations reaches the preset number of switching operations, the speed of the air supply fan is increased.

[0096] Increasing the speed of the air supply fan 31 can accelerate the flow of cooling air, thereby improving the refrigeration efficiency of the cold storage compartment 12 and the first variable temperature compartment 13, and avoiding the problem of temperature rise in the non-cooled compartment due to excessive refrigeration time in a certain compartment during the switching process.

[0097] In some embodiments, after controlling the alternating cooling of the refrigerated compartment 12 and the first variable temperature compartment 13, the control method of the present invention further includes:

[0098] When either the refrigerated compartment 12 or the first variable temperature compartment 13 reaches its set shutdown temperature, cooling for that compartment stops, and cooling for the other compartment that has not yet reached its set shutdown temperature continues until that other compartment reaches its set shutdown temperature, at which point cooling stops.

[0099] The present invention also provides a refrigeration and freezing device 1. Figure 7 This is a schematic structural block diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention. The refrigeration and freezing apparatus 1 includes a housing 10, a temperature detection component 80, and a control device 90 electrically connected to the temperature detection component 80.

[0100] The enclosure 10 is divided into multiple storage compartments for storing items. The multiple storage compartments are cooled by the cooling airflow after being cooled by the second cooling chamber. The second cooling chamber is equipped with an evaporator and a blower. Each storage compartment is equipped with a corresponding blower.

[0101] The temperature detection assembly 80 is used to detect the measured temperature in each storage compartment and the evaporator temperature of the evaporator. Specifically, the temperature detection assembly 80 may include multiple temperature sensors distributed across multiple storage compartments and the evaporator.

[0102] The control device 90 includes a processor 91 and a memory 92. The memory 92 stores a machine-executable program 93, and when the machine-executable program 93 is executed by the processor 91, it is used to implement the control method described in any of the above embodiments.

[0103] The refrigeration and freezing apparatus of this invention delivers the residual cold energy from the evaporator to each target storage compartment in a step-by-step manner, achieving full utilization of the residual cold energy in each compartment without affecting the preservation effect of the target storage compartment with a higher set temperature, and preventing the temperature in the target storage compartment with a lower set temperature from rising again. Furthermore, the heat from each target storage compartment can be used step-by-step to raise the temperature of the evaporator, thereby facilitating the melting of frost on the evaporator. Moreover, when airflow circulates between the target storage compartment with a measured temperature greater than zero and the second cooling chamber, the return airflow from the target storage compartment can be used to defrost the evaporator, achieving multiple beneficial technical effects.

[0104] Furthermore, the cabinet 10 also defines a freezer compartment 11 and a second variable-temperature compartment 14. The freezer compartment 11 is located on the first side of the cabinet 10 in the transverse direction and is supplied with cooling capacity through a first cooling chamber located below the freezer compartment 11. The refrigerator compartment 12, the first variable-temperature compartment 13, and the second variable-temperature compartment 14 are arranged from top to bottom on the second side of the cabinet 10 in the transverse direction and are adjacent to the freezer compartment 11. The refrigerator compartment 12, the first variable-temperature compartment 13, and the second variable-temperature compartment 14 are all supplied with cooling capacity through a second cooling chamber 152 located below the second variable-temperature compartment 14.

[0105] Those skilled in the art should understand that the embodiments described above are merely some embodiments of the present invention, and not all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0106] It should be noted that in the description of this invention, terms such as “center,” “upper,” “lower,” “top,” “bottom,” “front,” “rear,” “vertical,” “horizontal,” “inner,” and “outer,” which indicate direction or positional relationship, are based on the actual use of the refrigeration and freezing device 1. They are used only for ease of description and do not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0107] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0108] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A control method for a refrigeration and freezing apparatus, the refrigeration and freezing apparatus having multiple storage compartments for storing items, each of the multiple storage compartments being supplied with cooling capacity by a cooling airflow cooled by a second cooling chamber, the second cooling chamber being equipped with an evaporator and a blower, and each of the storage compartments being correspondingly equipped with a blower damper; and the control method comprising: When all the storage compartments are in a non-cooling state, the measured temperature inside each of the storage compartments and the evaporator temperature of the evaporator are obtained; When the difference between the measured temperature of any of the storage rooms and the temperature of the evaporator is greater than or equal to the first preset temperature difference value, the auxiliary cooling mode is entered, wherein the storage room whose measured temperature is greater than or equal to the temperature of the evaporator is the target storage room. In the auxiliary cooling mode, the air supply fan is activated, and the number of the target storage compartments is obtained; When there are two or more target storage rooms, obtain the set temperature of each target storage room; The air supply dampers corresponding to the target storage room are opened alternately in order of priority from low to high temperature. The steps of alternately opening the air supply dampers corresponding to the target storage room in a priority order from low to high according to the set temperature include: Open the air supply damper corresponding to the highest priority target storage room; Obtain the measured temperature inside the target storage room with the highest priority; When the measured temperature in the highest priority target storage room meets the preset conditions, the air supply damper corresponding to the highest priority target storage room is closed, and the air supply damper corresponding to the next highest priority target storage room is opened, and so on. When the measured temperature in the target storage room with the lowest priority meets the preset condition, the air supply damper corresponding to the target storage room with the lowest priority is closed, and the auxiliary cooling mode is exited.

2. The control method according to claim 1, wherein The preset conditions include any one or more of the following: The measured temperature inside the target storage room reached its set shutdown point temperature. The difference between the measured temperature inside the target storage room and the current evaporator temperature is less than the first preset temperature value.

3. The control method according to claim 1, wherein... When the number of the target storage compartments is only one, the control method further includes: Open the air supply door corresponding to the target storage room.

4. The control method according to claim 1, wherein The plurality of storage compartments includes a refrigerated compartment with a refrigerated storage environment and a first variable-temperature compartment that selectively has either a refrigerated or frozen storage environment. Return airflow from the refrigerated compartment and the first variable-temperature compartment returns to the second cooling compartment via the same return air duct, which is equipped with a baffle plate. The control method further includes: When the air supply damper corresponding to the cold storage compartment is opened, the baffle plate is controlled to rotate to the second state of connecting the cold storage compartment and the return air duct while blocking the first temperature-controlled compartment and the return air duct; When the air supply damper corresponding to the first temperature-changing chamber is opened, the baffle plate is controlled to rotate to the first state of connecting the first temperature-changing chamber and the return air duct while blocking the cold storage chamber and the return air duct.

5. The control method according to claim 4 further includes: When both the cold storage room and the first variable temperature room require refrigeration, and the first variable temperature room is in the freezing position, the measured temperature inside the cold storage room is obtained. as well as When the measured temperature inside the refrigeration room reaches a preset temperature value that is between its set shutdown point temperature and set startup point temperature, the refrigeration room and the first variable temperature room are controlled to alternately cool.

6. The control method according to claim 5, wherein The steps of controlling the alternating cooling of the cold storage compartment and the first variable temperature compartment include: The refrigeration and cooling programs and the first variable temperature refrigeration program are executed alternately according to a preset time cycle. in In the refrigeration program, the air supply damper corresponding to the refrigeration compartment is opened, the air supply damper corresponding to the first variable temperature compartment is closed, and the baffle is adjusted to the second state. After the refrigeration program lasts for a first preset time, the first variable temperature refrigeration program is executed. In the first variable temperature refrigeration program, the air supply damper corresponding to the refrigeration compartment is controlled to close, the air supply damper corresponding to the first variable temperature compartment is controlled to open, and the baffle is adjusted to the first state. After the first variable temperature refrigeration program continues for a second preset time, the refrigeration program is executed.

7. The control method according to claim 5, wherein After controlling the alternating cooling of the refrigerated compartment and the first variable temperature compartment, the control method further includes: Obtain the actual number of times the cold storage compartment and the first variable temperature compartment alternately switch cooling; When the actual number of switching times reaches the preset number of switching times, the speed of the air supply fan is increased.

8. The control method according to claim 5, wherein After controlling the alternating cooling of the refrigerated compartment and the first variable temperature compartment, the control method further includes: When either the refrigerated compartment or the first variable temperature compartment reaches its set shutdown temperature, refrigeration for that compartment is stopped, and refrigeration continues for the other compartment that has not yet reached its set shutdown temperature until that other compartment reaches its set shutdown temperature, at which point refrigeration is stopped.

9. A refrigeration and freezing apparatus, comprising: The enclosure contains multiple storage compartments for storing items. Each of the multiple storage compartments is cooled by a cooling airflow that has been cooled by a second cooling chamber. The second cooling chamber is equipped with an evaporator and a blower. Each of the storage compartments is equipped with a corresponding airflow damper. A temperature detection component is used to detect the measured temperature inside each of the storage rooms and the evaporator temperature of the evaporator; as well as A control device includes a processor and a memory, the memory storing a machine-executable program, and the machine-executable program being executed by the processor to implement the control method according to any one of claims 1-8.

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