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 at least having a refrigeration compartment, a freezing compartment and a first temperature-variable compartment, a first cooling chamber and a second cooling chamber; return air flows in the refrigeration compartment and the first temperature-variable compartment return to the first cooling chamber and the second cooling chamber through a same return air pipe, and a return air baffle is arranged in the return air pipe. The control method comprises: when the refrigeration compartment is in a refrigeration state and the first temperature-variable compartment is in a non-refrigeration state, adjusting the return air baffle to a first state of conducting the return air pipe and the first cooling chamber and blocking the return air pipe and the second cooling chamber; when the refrigeration compartment is in a non-refrigeration state and the first temperature-variable compartment is in a refrigeration state, adjusting the return air baffle to a second state of blocking the return air pipe and the first cooling chamber and conducting the return air pipe and the second cooling chamber, effectively avoiding the problem of air mixing between the refrigeration compartment, the first temperature-variable compartment and the two cooling chambers.

Description

Technical Field

[0001] This invention relates to refrigeration and freezing technology, and in particular to a refrigeration and freezing apparatus and its control method. Background Technology

[0002] In daily life, people mainly use refrigerators to store and preserve items. Common refrigerators in existing technology include traditional two-door refrigerators, T-type refrigerators, French door refrigerators, and side-by-side refrigerators. Existing refrigerators have a limited number of storage compartments, making it impossible to precisely partition and store various types of food, thus failing to meet diverse user needs. Therefore, to meet users' precise partitioning and storage requirements, the applicant has designed a refrigerator with multiple compartments, including refrigeration, freezing, a first variable temperature compartment, and a fully variable temperature compartment. However, the refrigeration compartment and the first variable temperature compartment require separate return air ducts, which takes up space, increases costs and labor time, negatively impacts user experience and manufacturing processes, and sacrifices evaporator space, leading to performance degradation. Summary of the Invention

[0003] In order to solve the technical problems mentioned in the background section, the inventors thought of using the same return air duct to return air to the cold storage room and the small variable temperature room. However, if the cold storage room and the small variable temperature room are connected to the return air duct at the same time, it may cause cross-ventilation between the cold storage room and the small variable temperature room, resulting in condensation or frost.

[0004] Therefore, one object of the first aspect of the present invention is to overcome at least one deficiency of the prior art and to provide a control method for a refrigeration and freezing apparatus having only one return air duct and where cross-ventilation between compartments is not easily generated.

[0005] A further objective of the first aspect of the present invention is to avoid severe icing or frosting in the compartments and return air ducts.

[0006] The second aspect of the present invention is to provide a refrigeration and freezing device with only one return air duct and in which cross-flow, condensation or icing is not easily generated between compartments.

[0007] According to a first aspect of the present invention, the present invention provides a control method for a refrigeration and freezing apparatus, the refrigeration and freezing apparatus having at least a refrigeration compartment, a freezing compartment, and a first variable-temperature compartment for storing articles; a first cooling compartment for providing cooling capacity to the refrigeration compartment and the freezing compartment; and a second cooling compartment for providing cooling capacity to at least the first variable-temperature compartment; return airflow from the refrigeration compartment and the first variable-temperature compartment returns to the first cooling compartment and the second cooling compartment respectively through the same return air duct, the return air duct being provided with a return air baffle; and

[0008] The control method includes:

[0009] When the cold storage room is in a cooling state and the first variable temperature room is in a non-cooling state, the return air damper is adjusted to the first state of connecting the return air duct and the first cooling room and blocking the return air duct and the second cooling room;

[0010] When the cold storage room is in a non-cooling state and the first variable temperature room is in a cooling state, the return air damper is adjusted to a second state that blocks the return air duct and the first cooling room while opening the return air duct and the second cooling room.

[0011] Optionally, the control method further includes:

[0012] When both the cold storage room and the first variable temperature room need to be refrigerated, the set temperature of the first variable temperature room is obtained;

[0013] When the set temperature of the first variable temperature chamber is greater than zero, the return air damper is adjusted to a third state that connects the return air duct and the first cooling chamber and the second cooling chamber.

[0014] When the set temperature of the first variable temperature chamber is less than or equal to zero, the refrigeration chamber and the first variable temperature chamber are controlled to alternately cool.

[0015] Optionally, the refrigeration and freezing apparatus further includes a refrigeration duct assembly for conveying the cooling airflow generated in the first cooling chamber, a refrigeration air supply duct connecting the refrigeration duct assembly and the refrigeration chamber, a refrigeration damper disposed in the refrigeration air supply duct, and a first temperature-changing damper disposed in the first temperature-changing air supply duct from the second cooling chamber to the first temperature-changing chamber; and

[0016] The steps of controlling the alternating cooling of the cold storage compartment and the first variable temperature compartment include:

[0017] The refrigeration program and the first variable-temperature refrigeration program are executed alternately; among which...

[0018] In the refrigeration process, the refrigeration damper is opened, the first temperature-controlled damper is closed, and the return air baffle is adjusted to the first state; and

[0019] In the first variable temperature refrigeration program, the refrigeration damper is controlled to close, the first variable temperature damper is controlled to open, and the return air damper is adjusted to the second state.

[0020] Optionally, after controlling the cold storage compartment and the first variable temperature compartment to alternately cool, the control method further includes:

[0021] 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.

[0022] Optionally, the refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezer compartment and the refrigeration compartment, and a refrigeration fan disposed in the refrigeration compartment; and

[0023] The control method further includes:

[0024] When the freezer compartment is in a cooling state, the first air supply fan is controlled to be in operation.

[0025] When the freezer compartment is in a non-cooling state and the refrigerator compartment is in a cooling state, the first air supply fan is controlled to stop and the refrigerator fan is controlled to run.

[0026] Optionally, the refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezer compartment and the refrigeration compartment, and a refrigeration fan disposed in the refrigeration compartment; and

[0027] The control method further includes:

[0028] When both the freezer compartment and the refrigerator compartment are in a non-cooling state, the first air supply fan is controlled to be stopped and the refrigerator fan is controlled to be running.

[0029] Obtain the measured temperature inside the cold storage room;

[0030] If the measured temperature inside the cold storage room reaches its set shutdown point temperature, the cold storage fan will stop.

[0031] Optionally, the refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezer compartment and the refrigeration compartment, and a refrigeration fan disposed in the refrigeration compartment; and

[0032] The control method further includes:

[0033] When both the freezer compartment and the refrigerator compartment are in a cooling state, determine whether the preset conditions used to indicate that the refrigerator compartment needs to be cooled quickly are met;

[0034] If so, then both the first air supply fan and the refrigeration fan will be in operation.

[0035] If not, then control the first air supply fan to be in the running state and control the refrigeration fan to be in the stopped state.

[0036] Optionally, the refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezing compartment and the refrigeration compartment, and a second air supply fan for driving air supply to at least the first variable temperature compartment;

[0037] The control method further includes:

[0038] When the first variable temperature chamber is in a cooling state and both the refrigerator chamber and the freezer chamber are in a non-cooling state, the temperature of the first evaporator in the first cooling chamber and the measured temperature in the freezer chamber are obtained.

[0039] Calculate the temperature difference between the measured temperature of the freezer compartment and the temperature of the first evaporator;

[0040] When the temperature difference reaches the preset temperature difference value, the first air supply fan is started and controlled to run at the preset speed.

[0041] Optionally, the preset rotation speed is less than the rotation speed of the first air supply fan when the refrigeration room is in a cooling state.

[0042] According to a second aspect of the present invention, the present invention also provides a refrigeration and freezing apparatus, comprising:

[0043] The enclosure includes at least a refrigerated compartment, a frozen compartment, and a first variable-temperature compartment for storing items; a first cooling compartment for providing cooling to the refrigerated compartment and the frozen compartment; and a second cooling compartment for providing cooling to the first variable-temperature compartment. Return airflow from the refrigerated compartment and the first variable-temperature compartment returns to the first cooling compartment and the second cooling compartment respectively through the same return air duct.

[0044] A return air damper, disposed within the return air duct, has a first state in which it connects the return air duct and the first cooling chamber while blocking the return air duct and the second cooling chamber, and a second state in which it blocks the return air duct and the first cooling chamber while connecting the return air duct and the second cooling chamber; and

[0045] 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 described in any of the above schemes.

[0046] Since the cold storage room and the first variable temperature room are cooled by different cooling chambers, the return airflow from the cold storage room and the first variable temperature room needs to return to their respective cooling chambers. However, the return airflow from both the cold storage room and the first variable temperature room flows within the same return air duct, leading to problems such as cross-contamination and mixed airflow. To address this, the present invention specifically incorporates a return air baffle within the return air duct. When the cold storage room is in cooling mode and the first variable temperature room is in non-cooling mode, the return air baffle is adjusted to a first state that connects the return air duct and the first cooling chamber while blocking the return air duct and the second cooling chamber. In this state, the airflow in the return air duct originates from the cold storage room and flows only towards the first cooling chamber, not towards the second cooling chamber or the first variable temperature room. This ensures normal return airflow from the cold storage room and prevents the return airflow from the cold storage room from affecting the second cooling chamber and the first variable temperature room. When the first variable-temperature compartment is in cooling mode and the refrigerated compartment is in non-cooling mode, the return air damper is adjusted to a second state where it connects the return air duct to the second cooling compartment and blocks the return air duct from the first cooling compartment. In this state, the airflow in the return air duct originates from the first variable-temperature compartment and flows only to the second cooling compartment, not to the first cooling compartment or the refrigerated compartment. This achieves normal return airflow from the first variable-temperature compartment and prevents the return airflow from affecting the first cooling compartment and the refrigerated compartment. Therefore, by installing a return air damper in the return air duct and controlling it appropriately, this invention can effectively prevent cross-flow between the refrigerated compartment, the first variable-temperature compartment, and the two cooling compartments caused by using the same return air duct to return air to different cooling compartments. This avoids large temperature fluctuations in the refrigerated compartment and the first variable-temperature compartment, and also prevents condensation or frost formation in these compartments.

[0047] Furthermore, when both the refrigerated compartment and the first variable-temperature compartment require cooling, if the set temperature of the first variable-temperature compartment is greater than zero (i.e., when the first variable-temperature compartment is set to refrigeration mode), its internal temperature is close to that of the refrigerated compartment. Therefore, the return air temperature of the two compartments is also relatively close, and even if there is cross-ventilation, it will not affect the cooling effect of the two compartments. Therefore, at this time, adjusting the return air damper to the third state simultaneously connects the return air duct and both cooling chambers. The return airflow from the refrigerated compartment and the first variable-temperature compartment mixes in the return air duct and splits into two branches on the downstream side of the return air duct, flowing into the two cooling chambers respectively. This achieves normal return airflow in both compartments, ensuring that both compartments have good cooling effect and high cooling efficiency.

[0048] Furthermore, when both the refrigerator compartment and the first variable-temperature compartment require cooling, if the set temperature of the first variable-temperature compartment is less than zero (i.e., when the first variable-temperature compartment is set to the freezing position), the temperature inside it differs significantly from that of the refrigerator compartment. Therefore, the temperature difference in the return airflow between the two compartments is also substantial. If cross-ventilation occurs, it will significantly impact the cooling effect of both compartments. In this case, controlling the cooling of the refrigerator compartment and the first variable-temperature compartment alternately—that is, cooling the refrigerator compartment for a period before cooling the first variable-temperature compartment—prevents the return airflow from each compartment during individual cooling from flowing into the corresponding cooling chamber of the other compartment, thus preventing cross-ventilation. Therefore, condensation, frost, or ice formation will not occur in either compartment.

[0049] Furthermore, when the first variable-temperature compartment is set to the freezing position, the temperature of the return air flowing from the first variable-temperature compartment into the return air duct is relatively low, making it easier for frost and ice to form inside the return air duct. This invention sets the refrigerator compartment and the first variable-temperature compartment to alternate cooling. It also allows the higher-temperature return air from the refrigerator compartment to melt any frost that may form inside the return air duct during refrigeration, thereby preventing severe icing or frosting inside the return air duct.

[0050] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0051] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0052] Figure 1 This is a schematic front view of a refrigeration and freezing apparatus according to an embodiment of the present invention;

[0053] Figure 2 , Figure 3 and Figure 4 All are schematic top views of a refrigeration and freezing apparatus according to an embodiment of the present invention;

[0054] Figure 5 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to an embodiment of the present invention;

[0055] Figure 6 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to another embodiment of the present invention;

[0056] Figure 7 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to yet another embodiment of the present invention;

[0057] Figure 8 This is a schematic structural block diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention. Detailed Implementation

[0058] This invention first provides a control method for a refrigeration and freezing device. Figure 1 This is a schematic front view of a refrigeration and freezing apparatus according to an embodiment of the present invention. Figure 2 , Figure 3 and Figure 4 These are all schematic top views of a refrigeration and freezing apparatus according to an embodiment of the present invention. See also Figures 1 to 4 The refrigeration and freezing apparatus 1 of the present invention includes at least a refrigeration compartment 12, a freezing compartment 11, and a first variable-temperature compartment 13 for storing items; a first cooling chamber 151 for providing cooling capacity to the refrigeration compartment 12 and the freezing compartment 11; and a second cooling chamber 152 for providing cooling capacity to the first variable-temperature compartment 13. Return airflow in the refrigeration compartment 12 and the first variable-temperature compartment 13 returns to the first cooling chamber 151 and the second cooling chamber 152 respectively through the same return air duct 20. That is, the refrigeration compartment 12 and the first variable-temperature compartment 13 return air through the same return air duct 20, reducing the number of return air ducts 20 and the space occupied by the return air ducts, simplifying the process, and reducing costs.

[0059] Furthermore, a return air baffle 21 is provided inside the return air duct 20, and the return air baffle 21 has multiple different states. Figure 2 , Figure 3 and Figure 4 In the middle, the return air damper 21 is in different states.

[0060] The control method of the present invention is based on the refrigeration and freezing device 1 having the above-described structure.

[0061] The control method of the present invention includes:

[0062] When the cold storage compartment 12 is in a cooling state and the first variable temperature compartment 13 is in a non-cooling state, the return air damper 21 is adjusted to the first state of connecting the return air duct 20 and the first cooling chamber 151 and blocking the return air duct 20 and the second cooling chamber 152 (see Figure 2 );

[0063] When the cold storage compartment 12 is in a non-cooling state and the first variable temperature compartment 13 is in a cooling state, the return air damper 21 is adjusted to the second state, which blocks the return air duct 20 and the first cooling chamber 151 and opens the return air duct 20 and the second cooling chamber 152 (see...). Figure 3 ).

[0064] Since the cold storage room 12 and the first variable temperature room 13 are cooled by different cooling chambers, the return airflow in the cold storage room 12 and the first variable temperature room 13 needs to return to different cooling chambers. However, the return airflow in the cold storage room 12 and the first variable temperature room 13 both flow in the same return air duct 20, which causes problems such as cross-flow and mixed air. To this end, the present invention specifically provides a return air baffle 21 in the return air duct 20. When the cold storage compartment 12 is in a cooling state and the first variable temperature compartment 13 is in a non-cooling state, the return air baffle 21 is adjusted to the first state of connecting the return air duct 20 and the first cooling compartment 151 and blocking the return air duct 20 and the second cooling compartment 152. At this time, the airflow in the return air duct 20 comes from the cold storage compartment 12, and the airflow in the return air duct 20 only flows to the first cooling compartment 151, and will not backflow into the second cooling compartment 152 and the first variable temperature compartment 13, thus realizing the normal return air of the cold storage compartment 12 and avoiding the return airflow in the cold storage compartment 12 from affecting the second cooling compartment 152 and the first variable temperature compartment 13. When the first variable temperature chamber 13 is in a cooling state and the cold storage chamber 12 is in a non-cooling state, the return air baffle 21 is adjusted to the second state, which connects the return air duct 20 and the second cooling chamber 152 and blocks the return air duct 20 and the first cooling chamber 151. At this time, the airflow in the return air duct 20 comes from the first variable temperature chamber 13, and the airflow in the return air duct 20 only flows to the second cooling chamber 152, and will not backflow into the first cooling chamber 151 and the cold storage chamber 12. This achieves normal return air in the first variable temperature chamber 13 and avoids the return airflow in the first variable temperature chamber 13 from affecting the first cooling chamber 151 and the cold storage chamber 12.

[0065] As can be seen, by setting a return air baffle 21 in the return air duct 20 and controlling it reasonably, the present invention can effectively avoid cross-ventilation between the cold storage room 12, the first variable temperature room 13 and the two cooling rooms because the cold storage room 12 and the first variable temperature room 13 use the same return air duct 20 to return air to different cooling rooms. 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.

[0066] Specifically, Figure 5 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to an embodiment of the present invention. The control method of the present invention may specifically include:

[0067] Step S10: Obtain the status of the cold storage compartment 12 and the first variable temperature compartment 13;

[0068] Step S21: Determine whether the cold storage compartment 12 and the first variable temperature compartment 13 are in a cooling state; if the cold storage compartment 12 is in a cooling state and the first variable temperature compartment 13 is in a non-cooling state, proceed to step S22; if the cold storage compartment 12 is in a non-cooling state and the first variable temperature compartment 13 is in a cooling state, proceed to step S23.

[0069] Step S22: Adjust the return air damper 21 to the first state;

[0070] Step S23: Adjust the return air damper 21 to the second state.

[0071] The inventors recognized that when both the refrigerated compartment 12 and the first variable-temperature compartment 13 require cooling, airflow circulation is necessary between the refrigerated compartment 12 and the first cooling chamber 151, as well as between the first variable-temperature compartment 13 and the second cooling chamber 152. If the set temperature of the first variable-temperature compartment 13 is greater than zero, i.e., when the first variable-temperature compartment 13 is set to the refrigeration setting, its temperature is close to that of the refrigerated compartment 12. Therefore, the return airflow temperatures of the two compartments are also relatively close, and even if cross-ventilation occurs, it will not affect the cooling effect of the two compartments. If the set temperature of the first variable-temperature compartment 13 is less than zero, i.e., when the first variable-temperature compartment 13 is set to the freezing setting, its temperature differs significantly from that of the refrigerated compartment 12. Therefore, the return airflow temperatures of the two compartments also differ significantly, and if cross-ventilation occurs, it will have a very significant impact on the cooling effect of the two compartments.

[0072] Therefore, in some embodiments, the control method of the present invention further includes:

[0073] When both the cold storage compartment 12 and the first variable temperature compartment 13 need to be refrigerated, the set temperature of the first variable temperature compartment 13 is obtained;

[0074] When the set temperature of the first variable temperature chamber 13 is greater than zero, the return air damper 21 is adjusted to the third state, which connects the return air duct 20 and the first cooling chamber 151, and also connects the return air duct 20 and the second cooling chamber 152 (see [reference]). Figure 4 );

[0075] When the set temperature of the first variable temperature chamber 13 is less than or equal to zero, the refrigeration chamber 12 and the first variable temperature chamber 13 are controlled to alternately cool.

[0076] When the set temperature of the first variable temperature chamber 13 is greater than zero, the present invention adjusts the return air baffle 21 to the third state, simultaneously connecting the return air duct 20 and the two cooling chambers. The return airflow of the refrigeration chamber 12 and the first variable temperature chamber 13 mixes in the return air duct 20 and splits into two branches on the downstream side of the return air duct 20, flowing into the two cooling chambers respectively. This achieves normal return air in the two chambers, ensuring that both chambers have good cooling effect and high cooling efficiency.

[0077] When the set temperature of the first variable temperature chamber 13 is less than or equal to zero, the present invention controls the refrigeration chamber 12 and the first variable temperature chamber 13 to cool alternately. That is, the refrigeration chamber 12 is cooled for a period of time and then the first variable temperature chamber 13 is cooled. When each chamber is cooled individually, the return airflow will not flow back into the cooling chamber of the other chamber, and there will be no cross-flow phenomenon. Therefore, condensation or frost and ice will not occur in the two chambers.

[0078] Furthermore, when the first variable-temperature compartment 13 is set to the freezing position, the temperature of the return air flowing from the first variable-temperature compartment 13 into the return air duct 20 is relatively low, making it easier for frost and ice to form inside the return air duct 20. This invention sets the refrigerator compartment 12 and the first variable-temperature compartment 13 to alternate cooling. When the refrigerator compartment 12 is cooling, the higher-temperature return air in the refrigerator compartment 12 can be used to melt any frost that may form inside the return air duct 20, thereby preventing severe icing or frosting inside the return air duct 20.

[0079] Specifically, Figure 6 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to another embodiment of the present invention. The control method of the present invention may specifically include:

[0080] Step S10: Obtain the status of the cold storage compartment 12 and the first variable temperature compartment 13;

[0081] Step S21: Determine whether the refrigerated compartment 12 and the first variable temperature compartment 13 are in a cooling state; if the refrigerated compartment 12 is in a cooling state and the first variable temperature compartment 13 is in a non-cooling state, proceed to step S22; if the refrigerated compartment 12 is in a non-cooling state and the first variable temperature compartment 13 is in a cooling state, proceed to step S23; if both the refrigerated compartment 12 and the first variable temperature compartment 13 require cooling, proceed to step S241.

[0082] Step S22: Adjust the return air damper 21 to the first state;

[0083] Step S23: Adjust the return air damper 21 to the second state.

[0084] Step S241: Obtain the set temperature of the first variable temperature chamber 13;

[0085] Step S242: Determine whether the set temperature of the first variable temperature chamber 13 is greater than zero; if yes, proceed to step S243; if no, proceed to step S244.

[0086] Step S243: Adjust the return air damper 21 to the third state;

[0087] Step S244: Control the refrigeration compartment 12 and the first variable temperature compartment 13 to alternately cool.

[0088] In some embodiments, the refrigeration and freezing apparatus 1 further includes a refrigeration duct assembly 51 for conveying the cooling airflow generated by the first cooling chamber 151, a refrigeration air supply duct 52 connecting the refrigeration duct assembly 51 and the refrigeration chamber 12, a refrigeration air damper 62 disposed in the refrigeration air supply duct 52, and a first temperature-changing air damper 63 disposed in the first temperature-changing air supply duct from the second cooling chamber 152 to the first temperature-changing chamber 13.

[0089] In these embodiments, the step of controlling the alternating cooling of the refrigerated compartment 12 and the first variable temperature compartment 13 may specifically include:

[0090] The refrigeration and first variable temperature refrigeration programs are executed alternately.

[0091] In the refrigeration process, the refrigeration damper 62 is opened, the first temperature-changing damper 63 is closed, and the return air baffle 21 is adjusted to the first state.

[0092] In the first variable temperature refrigeration program, the refrigeration damper 62 is closed, the first variable temperature damper 63 is opened, and the return air baffle 21 is adjusted to the second state.

[0093] That is, when the refrigeration program is executed, the refrigeration compartment 12 is refrigerated only, and the first variable temperature compartment 13 is not refrigerated; when the first variable temperature refrigeration program is executed, the first variable temperature compartment 13 is refrigerated only, and the refrigeration compartment 12 is not refrigerated.

[0094] 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:

[0095] 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.

[0096] In some embodiments, the refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezer compartment 11 and the refrigerator compartment 12, and a refrigeration fan disposed in the refrigerator compartment 12; and

[0097] The control method further includes:

[0098] When the freezer compartment 11 is in the cooling state, the first air supply fan is controlled to be in the running state;

[0099] When the freezer compartment 11 is in a non-cooling state and the refrigerator compartment 12 is in a cooling state, the first air supply fan is controlled to stop and the refrigerator fan is controlled to run.

[0100] In some embodiments, the refrigeration and freezing apparatus 1 further includes a first air supply fan 41 for driving air supply to the freezer compartment 11 and the refrigerator compartment 12, and a refrigeration fan 42 disposed in the refrigerator compartment 12.

[0101] In these embodiments, the control method of the present invention further includes:

[0102] When both the freezer compartment 11 and the refrigerator compartment 12 are in a non-cooling state, the first air supply fan 41 is controlled to be stopped and the refrigerator fan 42 is controlled to be running.

[0103] Obtain the measured temperature inside the cold storage compartment 12;

[0104] If the measured temperature inside the cold storage compartment 12 reaches its set shutdown temperature, the cold storage fan 42 will stop.

[0105] When both the freezer compartment 11 and the refrigerator compartment 12 are in a non-cooling state, neither compartment requires cooling. Therefore, stopping the first air supply fan 41 stops the air supply to the freezer compartment 11. Specifically, controlling the refrigerator fan 42 at this time serves two purposes: firstly, it directs the warmer return airflow from the refrigerator compartment 12 to the first cooling compartment 151, thereby raising the temperature of the first evaporator 31 in the first cooling compartment 151 using the return air from the refrigerator compartment 12, defrosting the first evaporator 31 and reducing the amount of frost buildup; secondly, it transfers the residual cold energy from the first evaporator 31 to the refrigerator compartment 12, lowering the temperature in the refrigerator compartment 12 and improving the utilization rate of the residual cold energy in the first evaporator 21. When the measured temperature in the refrigerator compartment 12 drops to its set shutdown point temperature, the refrigerator fan 42 is stopped to prevent further temperature drops in the refrigerator compartment 12, which would affect its preservation effect.

[0106] Specifically, Figure 7 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to yet another embodiment of the present invention. In some further embodiments, the control method of the present invention may specifically include:

[0107] Step S10: Obtain the status of the cold storage compartment 12 and the first variable temperature compartment 13;

[0108] Step S21: Determine whether the refrigerated compartment 12 and the first variable temperature compartment 13 are in a cooling state; if the refrigerated compartment 12 is in a cooling state and the first variable temperature compartment 13 is in a non-cooling state, proceed to step S22; if the refrigerated compartment 12 is in a non-cooling state and the first variable temperature compartment 13 is in a cooling state, proceed to step S23; if both the refrigerated compartment 12 and the first variable temperature compartment 13 are in a non-cooling state, proceed to step S251.

[0109] Step S22: Adjust the return air damper 21 to the first state;

[0110] Step S23: Adjust the return air damper 21 to the second state.

[0111] Step S251: Control the first air supply fan 41 to be in a stopped state and control the refrigeration fan 42 to be in a running state;

[0112] Step S252: Obtain the measured temperature inside the cold storage compartment 12;

[0113] Step S253: Determine whether the measured temperature inside the cold storage compartment 12 has reached its set shutdown point temperature. If so, proceed to step S254.

[0114] Step S254: Stop the refrigeration fan 42.

[0115] In some embodiments, the refrigeration and freezing apparatus 1 further includes a first air supply fan 41 for driving air supply to the freezer compartment 11 and the refrigerator compartment 12, and a refrigeration fan 42 disposed in the refrigerator compartment 12.

[0116] In these embodiments, the control method of the present invention further includes:

[0117] When both the freezer compartment 11 and the refrigerator compartment 12 are in a cooling state, determine whether the preset conditions used to indicate that the refrigerator compartment 12 needs to be cooled quickly are met.

[0118] If so, then both the first air supply fan 41 and the refrigeration fan 42 will be in operation.

[0119] If not, the first air supply fan 41 is controlled to be in the running state, and the refrigeration fan 42 is controlled to be in the stopped state.

[0120] In other words, when both the freezer compartment 11 and the refrigerator compartment 12 require cooling, the first air supply fan 41 can be activated to drive the cooling airflow generated in the first cooling chamber 151 to flow to the freezer compartment 11 and the refrigerator compartment 12. If the refrigerator compartment 12 requires rapid cooling, the refrigerator fan 42 can be activated to drive the cooling airflow in the freezer air duct assembly 51 to flow into the refrigerator compartment 12 more quickly and in greater quantities, so as to achieve the purpose of rapid cooling of the refrigerator compartment 12.

[0121] In some embodiments, the refrigeration and freezing apparatus 1 further includes a first air supply fan 41 for driving air supply to the freezing compartment 11 and the refrigeration compartment 12, and a second air supply fan 43 for driving air supply to at least the first variable temperature compartment 13.

[0122] In these embodiments, the control method of the present invention further includes:

[0123] When the first variable temperature chamber 13 is in a cooling state and the refrigerator chamber 12 and the freezer chamber 11 are both in a non-cooling state, the temperature of the first evaporator 31 in the first cooling chamber 151 and the measured temperature in the freezer chamber 11 are obtained.

[0124] Calculate the temperature difference between the measured temperature of the freezer compartment 11 and the temperature of the first evaporator 31;

[0125] When the temperature difference reaches the preset temperature difference value, the first air supply fan 41 is started and controlled to run at the preset speed.

[0126] Specifically, when the first variable-temperature compartment 13 is cooling and the refrigerator compartment 12 and freezer compartment 11 are not cooling, the first air supply fan 41 is usually stopped, while the second air supply fan 43 is running. For the dual-system refrigeration and freezing unit 1, in its refrigeration system structure, the second evaporator 32, which provides cooling to the first variable-temperature compartment 13, is connected in parallel with a bypass pipe and then in series with the first evaporator 31. When the first variable-temperature compartment 13 is cooling and the refrigerator compartment 12 and freezer compartment 11 are not cooling, the air flowing through the second evaporator 32 in the second cooling compartment 152 and also through the first evaporator 31 in the first cooling compartment 151 gradually decreases in temperature. When the temperature of the first evaporator 31 drops below the measured temperature of the freezer compartment 11 to a certain extent, the first air supply fan 41 can be activated to transfer the cooling capacity of the first evaporator 31 to the freezer compartment 11, thereby suppressing the temperature rise in the freezer compartment 11 during the cooling period of the first variable-temperature compartment 13.

[0127] Furthermore, the preset speed is lower than the speed of the first air supply fan 41 when the freezer compartment 11 is in cooling mode. That is, when the first air supply fan 41 is started during the cooling period of the first variable temperature compartment 13, the first air supply fan 41 can meet the requirements by running at low speed.

[0128] In some embodiments, the refrigeration and freezing apparatus 1 further includes a second air supply fan 43 for driving air supply to at least the first variable temperature compartment 13. The control method of the present invention further includes:

[0129] When the first temperature-controlled chamber 13 is in a cooling state, the second air supply fan 43 is controlled to be in operation.

[0130] The present invention also provides a refrigeration and freezing device 1. Figure 8 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 return air baffle 21, and a control device 90 electrically connected to the baffle 21.

[0131] The enclosure 10 includes at least a refrigerator compartment 12, a freezer compartment 11, and a first variable-temperature compartment 13 for storing items; a first cooling chamber 151 for providing cooling to the refrigerator compartment 12 and the freezer compartment 11; and a second cooling chamber 152 for providing cooling to the first variable-temperature compartment 13. Return airflow from the refrigerator compartment 12 and the first variable-temperature compartment 13 returns to the first cooling chamber 151 and the second cooling chamber 152 respectively via the same return air duct 20.

[0132] The return air baffle 21 is disposed inside the return air duct 20 and has a first state in which the return air duct 20 and the first cooling chamber 151 are connected and the return air duct 20 and the second cooling chamber 152 are blocked, and a second state in which the return air duct 20 and the first cooling chamber 151 are blocked and the return air duct 20 and the second cooling chamber 152 are connected.

[0133] 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.

[0134] The refrigeration and freezing device 1 of the present invention can effectively avoid cross-ventilation between the refrigeration compartment 12, the first variable temperature compartment 13 and the two cooling compartments by setting a return air baffle 21 in the return air duct 20 and controlling it reasonably. This is because the refrigeration compartment 12 and the first variable temperature compartment 13 use the same return air duct 20 to return air to different cooling compartments. As a result, large temperature fluctuations are avoided in the refrigeration compartment 12 and the first variable temperature compartment 13, and condensation or frost is less likely to occur in the refrigeration compartment 12 and the first variable temperature compartment 13.

[0135] Furthermore, a second variable temperature compartment 14 is defined within the cabinet 10, and the second variable temperature compartment 14 also receives cooling capacity through the second cooling chamber 152. The freezer compartment 11 is located on the first side in the transverse direction of the cabinet 10. 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 in the transverse direction of the cabinet 10 and are adjacent to the freezer compartment 11.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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 comprising at least a refrigeration compartment, a freezing compartment, and a first variable-temperature compartment for storing items; a first cooling compartment for providing cooling capacity to the refrigeration compartment and the freezing compartment; and a second cooling compartment for providing cooling capacity to at least the first variable-temperature compartment; return airflow from the refrigeration compartment and the first variable-temperature compartment returns to the first cooling compartment and the second cooling compartment respectively via the same return air duct, the return air duct being provided with a return air baffle; and The control method includes: When the cold storage room is in a cooling state and the first variable temperature room is in a non-cooling state, the return air damper is adjusted to the first state of connecting the return air duct and the first cooling room and blocking the return air duct and the second cooling room; When the cold storage room is in a non-cooling state and the first variable temperature room is in a cooling state, the return air damper is adjusted to a second state that blocks the return air duct and the first cooling room while opening the return air duct and the second cooling room; When both the cold storage room and the first variable temperature room need to be refrigerated, the set temperature of the first variable temperature room is obtained; When the set temperature of the first variable temperature chamber is greater than zero, the return air damper is adjusted to a third state that connects the return air duct and the first cooling chamber and the second cooling chamber. When the set temperature of the first variable temperature chamber is less than or equal to zero, the refrigeration chamber and the first variable temperature chamber are controlled to alternately cool.

2. The control method according to claim 1, wherein, The refrigeration and freezing device further includes a refrigeration air duct assembly for conveying the cooling airflow generated in the first cooling chamber, a refrigeration air supply pipe connecting the refrigeration air duct assembly and the refrigeration chamber, a refrigeration air damper disposed in the refrigeration air supply pipe, and a first temperature-changing air damper disposed in the first temperature-changing air supply duct from the second cooling chamber to the first temperature-changing chamber. and The steps of controlling the alternating cooling of the cold storage compartment and the first variable temperature compartment include: The refrigeration program and the first variable-temperature refrigeration program are executed alternately; among which... In the refrigeration process, the refrigeration damper is opened, the first temperature-controlled damper is closed, and the return air damper is adjusted to the first state; and In the first variable temperature refrigeration program, the refrigeration damper is closed, the first variable temperature damper is opened, and the return air damper is adjusted to the second state.

3. The control method according to claim 2, 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.

4. The control method according to claim 1, wherein, The refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezing compartment and the refrigeration compartment, and a refrigeration fan disposed in the refrigeration compartment; and The control method further includes: When the freezer compartment is in a cooling state, the first air supply fan is controlled to be in operation. When the freezer compartment is in a non-cooling state and the refrigerator compartment is in a cooling state, the first air supply fan is controlled to stop and the refrigerator fan is controlled to run.

5. The control method according to claim 1, wherein... The refrigeration and freezing unit further includes a first air supply fan for driving air supply to the freezing compartment and the refrigeration compartment, and a refrigeration fan disposed in the refrigeration compartment; and The control method further includes: When both the freezer compartment and the refrigerator compartment are in a non-cooling state, the first air supply fan is controlled to be stopped and the refrigerator fan is controlled to be running. Obtain the measured temperature inside the cold storage room; If the measured temperature inside the cold storage room reaches its set shutdown point temperature, the cold storage fan will stop.

6. The control method according to claim 1, wherein The refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezing compartment and the refrigeration compartment, and a refrigeration fan disposed in the refrigeration compartment; and The control method further includes: When both the freezer compartment and the refrigerator compartment are in a cooling state, determine whether the preset conditions used to indicate that the refrigerator compartment needs to be cooled quickly are met; If so, then both the first air supply fan and the refrigeration fan will be in operation. If not, then control the first air supply fan to be in the running state and control the refrigeration fan to be in the stopped state.

7. The control method according to claim 1, wherein The refrigeration and freezing apparatus further includes a first air supply fan for driving air supply to the freezing compartment and the refrigeration compartment, and a second air supply fan for driving air supply to at least the first variable temperature compartment; The control method further includes: When the first variable temperature chamber is in a cooling state and both the refrigerator chamber and the freezer chamber are in a non-cooling state, the temperature of the first evaporator in the first cooling chamber and the measured temperature in the freezer chamber are obtained. Calculate the temperature difference between the measured temperature of the freezer compartment and the temperature of the first evaporator; When the temperature difference reaches the preset temperature difference value, the first air supply fan is started and controlled to run at the preset speed.

8. The control method according to claim 7, wherein The preset rotational speed is less than the rotational speed of the first air supply fan when the refrigeration room is in a cooling state.

9. A refrigeration and freezing apparatus, comprising: The enclosure includes at least a refrigerated compartment, a frozen compartment, and a first variable-temperature compartment for storing items; a first cooling compartment for providing cooling to the refrigerated compartment and the frozen compartment; and a second cooling compartment for providing cooling to the first variable-temperature compartment. Return airflow from the refrigerated compartment and the first variable-temperature compartment returns to the first cooling compartment and the second cooling compartment respectively through the same return air duct. A return air baffle is disposed inside the return air duct and has a first state in which the return air duct and the first cooling chamber are connected and the return air duct and the second cooling chamber are blocked, and a second state in which the return air duct and the first cooling chamber are blocked and the return air duct and the second cooling chamber are connected. 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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