Refrigeration and freezing equipment and its control methods

Abstract

This invention relates to a refrigeration and freezing apparatus and its control method. The refrigeration and freezing apparatus includes a refrigeration compartment, a first variable-temperature compartment, and a second cooling compartment. Return airflow from the refrigeration compartment and the first variable-temperature compartment returns to the second cooling compartment via a common return air duct. A baffle plate is installed within the return air duct. The baffle plate has two states: a first state where it connects the first variable-temperature compartment and the return air duct but blocks the refrigeration compartment and the return air duct; and a second state where it connects the refrigeration compartment and the return air duct but blocks the first variable-temperature compartment and the return air duct. The control method of this invention includes: adjusting the baffle plate to the second state when the refrigeration compartment is in a cooling state and the first variable-temperature compartment is in a non-cooling state; and adjusting the baffle plate to the first state when the first variable-temperature compartment is in a cooling state and the refrigeration compartment is in a non-cooling state. This invention effectively avoids the problems of cross-ventilation and frost formation between the refrigeration compartment and the first variable-temperature compartment caused by using the same return air duct.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration and freezing, 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. The common refrigerators in the prior art mainly include traditional two-door refrigerators, T-shaped refrigerators, French-style refrigerators, side-by-side refrigerators, and the like. The existing refrigerators have a limited number of storage compartments, and cannot accurately store various types of food in different zones, which cannot meet the user's multiple use requirements. Therefore, in order to meet the user's accurate zoning storage requirements, the applicant specially designs a refrigerator with multiple compartments such as refrigeration, freezing, small temperature variation, and full temperature variation. Among them, the refrigeration, small temperature variation, and full temperature variation are refrigerated by the same cooling chamber, and the refrigeration compartment and the small temperature variation compartment need to be separately provided with a return air pipe, which not only occupies space but also increases cost and working hours, which is not conducive to user experience and manufacturing process, and at the same time, the performance will be reduced due to the occupation of space by the evaporator. SUMMARY

[0003] In order to solve the technical problems proposed in the background art, the inventors think that the same return air pipe can be used to return air for the refrigeration compartment and the small temperature variation compartment. However, the refrigeration compartment and the small temperature variation compartment are simultaneously communicated with the return air pipe, which may cause air to be mixed between the refrigeration compartment and the small temperature variation compartment, thereby causing condensation or icing problems.

[0004] Therefore, 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 having only one return air pipe and being less likely to cause condensation and icing in the compartments.

[0005] A further object of the first aspect of the present application is to avoid serious icing or frosting in the return air pipe.

[0006] An object of the second aspect of the present application is to provide a refrigeration and freezing device having only one return air pipe and being less likely to cause condensation and icing in the compartments.

[0007] According to the first aspect of the present application, the present application provides a control method of a refrigeration and freezing device, the refrigeration and freezing device having at least a refrigeration compartment and a first temperature variation compartment for storing articles, and a second cooling chamber for providing cold energy for the refrigeration compartment and the first temperature variation compartment; a return air flow in the refrigeration compartment and the first temperature variation compartment returns to the second cooling chamber through the same return air pipe, the return air pipe is provided with a baffle, the baffle has a first state of conducting the first temperature variation compartment and the return air pipe and blocking the refrigeration compartment and the return air pipe, and a second state of conducting the refrigeration compartment and the return air pipe and blocking the first temperature variation compartment and the return air pipe; and the control method comprises:

[0008] When the cold storage room is in a refrigerated state and the first variable temperature room is in a non-refrigerated state, the baffle is adjusted to the second state;

[0009] When the first variable temperature chamber is in a cooling state and the refrigerated chamber is in a non-cooling state, the baffle is adjusted to the first state.

[0010] Optionally, the baffle plate further has a third state in which it connects the first temperature-controlled compartment and the return air duct, and also connects the refrigerated compartment and the return air duct; and

[0011] The control method further includes:

[0012] When both the cold storage room and the first variable temperature room are in a cooling state, the baffle is adjusted to the third state.

[0013] Optionally, the second cooling chamber is equipped with an evaporator and a blower for driving airflow to the cold storage compartment and the first variable temperature compartment; and the control method further includes:

[0014] When both the cold storage room and the first variable temperature room are in a non-cooling state, the set temperature of the cold storage room and the first variable temperature room is obtained;

[0015] If the set temperature of the cold storage room is lower than the set temperature of the first variable temperature room, the baffle plate is adjusted to the first state and the air supply fan is started.

[0016] If the set temperature of the cold storage room is higher than the set temperature of the first variable temperature room, the baffle is adjusted to the second state and the air supply fan is started.

[0017] Optionally, a refrigeration damper is provided in the refrigeration air supply duct from the second cooling chamber to the refrigeration room, and a first temperature-changing damper is provided in the first temperature-changing air supply duct from the second cooling chamber to the first temperature-changing room; and

[0018] When the cold storage compartment is in a refrigeration state and the first variable temperature compartment is in a non-refrigeration state, the control method further includes: controlling the cold storage damper to open and controlling the first variable temperature damper to close.

[0019] When the first variable temperature chamber is in a cooling state and the refrigeration chamber is in a non-cooling state, the control method further includes: controlling the refrigeration damper to close and controlling the first variable temperature damper to open.

[0020] Optionally, the control method further includes:

[0021] When both the refrigerated compartment and the first variable-temperature compartment require cooling, and the first variable-temperature compartment is in the freezing position, the measured temperature inside the refrigerated compartment is obtained; and

[0022] 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.

[0023] Optionally, the second cooling chamber is provided with a blower for driving air supply to the cold storage chamber and the first variable temperature chamber;

[0024] After controlling the alternating cooling of the refrigerated compartment and the first variable temperature compartment, the control method further includes:

[0025] Obtain the actual number of times the cold storage compartment and the first variable temperature compartment alternately switch cooling;

[0026] When the actual number of switching times reaches the preset number of switching times, the speed of the air supply fan is increased.

[0027] Optionally, after controlling the alternating cooling of the refrigerated compartment and the first variable temperature compartment, the control method further includes:

[0028] 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.

[0029] Optionally, a refrigeration damper is provided in the refrigeration air supply duct from the second cooling chamber to the refrigeration room, and a first temperature-changing damper is provided in the first temperature-changing air supply duct from the second cooling chamber to the first temperature-changing room; and

[0030] The steps of controlling the alternating cooling of the cold storage compartment and the first variable temperature compartment include:

[0031] The refrigeration and first variable-temperature refrigeration programs are executed alternately according to a preset time cycle; among which...

[0032] In the refrigeration program, the refrigeration damper is opened, the first temperature-changing damper is closed, and the baffle is adjusted to the second state. After the refrigeration program lasts for a first preset time, the first temperature-changing refrigeration program is executed.

[0033] 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 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.

[0034] Optionally, the preset temperature value is the average of the set shutdown point temperature and the set startup point temperature inside the refrigeration room.

[0035] According to a second aspect of the present invention, the present invention also provides a refrigeration and freezing apparatus, comprising:

[0036] The enclosure includes at least a refrigerated compartment and a first variable-temperature compartment for storing items, and a second cooling compartment for providing cooling to the refrigerated compartment and the first variable-temperature compartment; the return airflow in the refrigerated compartment and the first variable-temperature compartment returns to the second cooling compartment through the same return air duct.

[0037] A baffle plate, disposed within the return air duct, has a first state in which it connects the first temperature-controlled compartment and the return air duct while blocking the refrigerated compartment and the return air duct, and a second state in which it connects the refrigerated compartment and the return air duct while blocking the first temperature-controlled compartment and the return air duct; and

[0038] 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.

[0039] The refrigeration and freezing apparatus of the present invention has a refrigeration compartment and a first variable temperature compartment. Both the refrigeration compartment and the first variable temperature compartment are cooled by a second cooling compartment. The return airflow of the refrigeration compartment and the first variable temperature compartment returns to the second cooling compartment through the same return air duct. That is, the refrigeration compartment and the first variable temperature compartment return air through the same return air duct, which reduces the number of return air ducts and the space occupied by the return air ducts, simplifies the process, and reduces costs.

[0040] Furthermore, a baffle plate is installed inside the return air duct, which has a first state and a second state. When the refrigerator compartment is in a cooling state and the first variable temperature compartment is in a non-cooling state, the baffle plate is adjusted to the second state to connect the refrigerator compartment and the return air duct while blocking the first variable temperature compartment and the return air duct. In this state, only the return airflow from the refrigerator compartment is allowed to flow into the return air duct, and the connection between the first variable temperature compartment and the return air duct is blocked, preventing the return airflow from the return air duct from flowing into the first variable temperature compartment. When the first variable temperature compartment is in a cooling state and the refrigerator compartment is in a non-cooling state, the baffle plate is adjusted to the first state to connect the first variable temperature compartment and the return air duct while blocking the refrigerator compartment and the return air duct. In this state, only the return airflow from the first variable temperature compartment is allowed to flow into the return air duct, and the connection between the refrigerator compartment and the return air duct is blocked, preventing the return airflow from the return air duct from flowing into the refrigerator compartment. As can be seen, by installing a baffle plate inside the return air duct and controlling it reasonably, the present invention can effectively avoid the problem of cross-ventilation between the cold storage room and the first variable temperature room caused by using the same return air duct, thereby avoiding large temperature fluctuations in the cold storage room and the first variable temperature room, and making it less likely for condensation or frost to form in the cold storage room and the first variable temperature room.

[0041] Furthermore, this invention further sets the refrigeration damper for controlling the air supply to the refrigeration room and the first variable temperature damper for controlling the air supply to the first variable temperature room to open and close alternately when the measured temperature in the refrigeration room is at a preset temperature value between the set shutdown point temperature and the set startup point temperature. That is, the refrigeration damper and the first variable temperature damper do not open at the same time, and the refrigeration room and the first variable temperature room do not cool at the same time. Instead, the refrigeration damper is opened for a period of time and then the first variable temperature damper is switched to open, alternately cooling the refrigeration room and the first variable temperature room separately. On the one hand, the intermittent cold input will not have a significant impact on the cooling of the refrigeration room and the first variable temperature room. On the other hand, when cooling the refrigeration room, the return airflow in the refrigeration room returns to the second cooling room through the return air duct. The relatively high temperature of the return airflow in the refrigeration room can be used to melt the frost that may be generated inside the return air duct, thereby avoiding severe icing or frosting in the return air duct.

[0042] 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

[0043] The following sections will describe some specific embodiments of the invention in detail 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:

[0044] Figure 1 and Figure 2 These are schematic structural diagrams of a refrigeration and freezing apparatus according to an embodiment of the present invention in different orientations.

[0045] Figure 3 This is a schematic cross-sectional view of a refrigeration and freezing apparatus according to an embodiment of the present invention;

[0046] 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;

[0047] Figure 7 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to another embodiment of the present invention;

[0049] Figure 9 This is a schematic flowchart of a control method for a refrigeration and freezing apparatus according to yet another embodiment of the present invention;

[0050] Figure 10 This is a schematic structural block diagram of a refrigeration and freezing apparatus according to an embodiment of the present invention. Detailed Implementation

[0051] This invention first provides a control method for a refrigeration and freezing device. Figure 1 and Figure 2 These are schematic structural diagrams of a refrigeration and freezing apparatus according to an embodiment of the present invention in different orientations. Figure 3 This is a schematic cross-sectional view of a refrigeration and freezing apparatus according to an embodiment of the present invention. See also Figures 1 to 3 The refrigeration and freezing apparatus 1 of the present invention includes at least a refrigerated compartment 12 for storing items and a first variable-temperature compartment 13, and a second cooling compartment 152 for providing cooling capacity to the refrigerated compartment 12 and the first variable-temperature compartment 13. Return airflow from 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. That is, the refrigerated compartment 12 and the first variable-temperature compartment 13 share 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.

[0052] Figure 4 and Figure 5 These are all schematic structural diagrams of return air ducts and related structures according to an embodiment of the present invention. See also Figure 4 and Figure 5The return air duct 20 is equipped with a baffle plate 21, which has a first state of connecting the first temperature-controlled compartment 13 and the return air duct 20 while blocking the cold storage compartment 12 and the return air duct 20 (see...). Figure 4 ), and the second state of connecting 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 5 ).

[0053] The control method of the present invention is based on the refrigeration and freezing device 1 having the above-described structure.

[0054] The control method of the present invention includes:

[0055] When the cold storage room 12 is in a cooling state and the first variable temperature room 13 is in a non-cooling state, adjust the wind deflector 21 to the second state;

[0056] 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 baffle 21 is adjusted to the first state.

[0057] 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 baffle plate 21 is adjusted to the second state to connect the cold storage compartment 12 and the return air duct 20, and block the first variable temperature compartment 13 and the return air duct 20. In this state, only the return airflow in the cold storage compartment 12 is allowed 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. The return airflow in the return air duct 20 will not flow into the first variable temperature compartment 13. When the first variable temperature chamber 13 is in a cooling state and the refrigerator chamber 12 is in a non-cooling state, the baffle plate 21 is adjusted to the first state to connect the first variable temperature chamber 13 and the return air duct 20, and block the refrigerator chamber 12 and the return air duct 20. In this state, only the return airflow in the first variable temperature chamber 13 is allowed to flow into the return air duct 20, and the connection between the refrigerator chamber 12 and the return air duct 20 is blocked. The return airflow in the return air duct 20 will not flow into the refrigerator chamber 12.

[0058] 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.

[0059] In some embodiments, see Figure 6The schematic structural diagram of the return air duct and its related structures shown in this embodiment of the present invention shows that the baffle 21 also has a third state in which it connects the first variable temperature chamber 13 and the return air duct 20 and the refrigerated chamber 12 and the return air duct 20.

[0060] Furthermore, the control method of the present invention also includes:

[0061] When both the cold storage compartment 12 and the first variable temperature compartment 13 are in the refrigeration state, the baffle 21 is adjusted to the third state, so that the return airflow in both the cold storage compartment 12 and the first variable temperature compartment 13 can flow into the return air duct 20, thereby achieving normal return air in the cold storage compartment 12 and the first variable temperature compartment 13.

[0062] Specifically, Figure 7 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:

[0063] Step S10: Obtain the status of the cold storage compartment 12 and the first variable temperature compartment 13;

[0064] 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 cooling state, proceed to step S24.

[0065] Step S22: Adjust the wind deflector 21 to the second state;

[0066] Step S23: Adjust the wind deflector 21 to the first state;

[0067] Step S24: Adjust the wind deflector 21 to the third state.

[0068] In some embodiments, the second cooling chamber 152 is provided with an evaporator 32 and a blower 31 for driving airflow to the cold storage chamber 12 and the first variable temperature chamber 13. Further, the control method of the present invention also includes:

[0069] When both the cold storage compartment 12 and the first variable temperature compartment 13 are in a non-cooling state, the set temperatures of the cold storage compartment 12 and the first variable temperature compartment 13 are obtained.

[0070] If the set temperature of the cold storage compartment 12 is lower than the set temperature of the first variable temperature compartment 13, the baffle plate 21 is adjusted to the first state and the air supply fan 31 is started.

[0071] If the set temperature of the cold storage compartment 12 is higher than the set temperature of the first variable temperature compartment 13, the baffle 21 is adjusted to the second state and the air supply fan 31 is started.

[0072] When both the refrigerator compartment 12 and the first variable temperature compartment 13 are in a non-cooling state, neither compartment requires cooling, and therefore no refrigerant flows through the evaporator 32. However, frost will form on the evaporator 32 during the heat exchange process, and defrosting can be performed on the evaporator 32 during the non-cooling periods of the refrigerator compartment 12 and the first variable temperature compartment 13.

[0073] If the set temperature of the refrigerator compartment 12 is lower than the set temperature of the first variable temperature compartment 13, that is, during the non-cooling period of the refrigerator compartment 12 and the first variable temperature compartment 13, the temperature in the first variable temperature compartment 13 is slightly higher. At this time, adjusting the baffle plate 21 to the first state and starting the blower 31 can cause the slightly higher temperature return airflow in the first variable temperature compartment 13 to circulate between the first variable temperature compartment 13 and the second cooling chamber 152, thereby using the slightly higher temperature return airflow in the first variable temperature compartment 13 to defrost the evaporator 32 in the second cooling chamber 152. If the set temperature of the first variable temperature chamber 13 is lower than the set temperature of the refrigerator chamber 12, that is, during the non-cooling period of the refrigerator chamber 12 and the first variable temperature chamber 13, the temperature in the refrigerator chamber 12 is slightly higher. At this time, adjusting the baffle plate 21 to the second state and starting the blower 31 can cause the slightly higher temperature return airflow in the refrigerator chamber 12 to circulate between the refrigerator chamber 12 and the second cooling chamber 152, thereby using the slightly higher temperature return airflow in the refrigerator chamber 12 to defrost the evaporator 32 in the second cooling chamber 152.

[0074] Compared to the existing technology that uses heating wires to defrost the evaporator, the present invention makes full use of the heat inside the refrigeration and freezing device 1, reduces the additional heat input by the heating wires, slows down the temperature rise of the refrigeration compartment 12 and the first variable temperature compartment 13 during non-refrigeration periods, and reduces the energy consumption of the refrigeration and freezing device 1.

[0075] Specifically, Figure 8 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:

[0076] Step S10: Obtain the status of the cold storage compartment 12 and the first variable temperature compartment 13;

[0077] 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 cooling state, proceed to step S24; if both the refrigerated compartment 12 and the first variable temperature compartment 13 are in a non-cooling state, proceed to step S25.

[0078] Step S22: Adjust the wind deflector 21 to the second state;

[0079] Step S23: Adjust the wind deflector 21 to the first state;

[0080] Step S24: Adjust the wind deflector 21 to the third state;

[0081] Step S25: Obtain the set temperatures of the cold storage compartment 12 and the first variable temperature compartment 13;

[0082] Step S26: Determine whether the set temperature of the cold storage compartment 12 is lower than the set temperature of the first variable temperature compartment 13; if yes, proceed to step S27; if no, proceed to step S28.

[0083] Step S27: Adjust the wind deflector 21 to the first state and start the air supply fan 31;

[0084] Step S28: Adjust the wind deflector 21 to the second state and start the air supply fan 31.

[0085] In some embodiments, a refrigeration damper is provided in the refrigeration air supply duct from the second cooling chamber 152 to the refrigeration chamber 12, and a first temperature-changing damper is provided in the first temperature-changing air supply duct from the second cooling chamber 152 to the first temperature-changing chamber 13.

[0086] In these embodiments, when the refrigerated compartment 12 is in a cooling state and the first variable temperature compartment 13 is in a non-cooling state, the control method of the present invention further includes: controlling the refrigerated air damper to open and controlling the first variable temperature air damper to close. When the first variable temperature compartment 13 is in a cooling state and the refrigerated compartment 12 is in a non-cooling state, the control method of the present invention further includes: controlling the refrigerated air damper to close and controlling the first variable temperature air damper to open.

[0087] The present invention can more precisely control the temperature in the refrigeration compartment 12 and the first variable temperature compartment 13 by controlling the refrigeration damper and the first variable temperature damper.

[0088] When both the refrigerator compartment 12 and the first variable-temperature compartment 13 require cooling, return air 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 a lower temperature for the return air flowing into the return air duct 20. Conversely, the temperature in the refrigerator compartment 12 is relatively higher, leading to a slightly higher temperature for the return air flowing into the return air duct 20. This significant temperature difference between the two return air streams creates a temperature fluctuation as they flow through the return air duct 20, easily causing condensation or even frost formation within the duct.

[0089] Therefore, in some embodiments, the control method of the present invention further includes:

[0090] 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

[0091] 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.

[0092] The present invention further enables the refrigeration chamber 12 and the first variable temperature chamber 13 to alternately cool when the measured temperature in the refrigeration chamber 12 is at a preset temperature value between its set shutdown point temperature and set startup point temperature. That is, the refrigeration damper used to control the air supply to the refrigeration chamber 12 and the first variable temperature damper used to control the air supply to the first variable temperature chamber 13 are set to open and close alternately. In other words, the refrigeration damper and the first variable temperature damper do not open at the same time, and the refrigeration chamber 12 and the first variable temperature chamber 13 do not cool at the same time. Instead, the refrigeration damper is opened for a period of time and then switched to the first variable temperature damper. The system can alternately and independently cool the refrigerator compartment 12 and the first variable temperature compartment 13. On the one hand, the intermittent input of cold air will not have a significant impact on the cooling of the refrigerator compartment 12 and the first variable temperature compartment 13. On the other hand, when cooling the refrigerator compartment 12, the return airflow in the refrigerator compartment 12 returns to the second cooling chamber 152 through the return air duct 20. The relatively high temperature of the return airflow in the refrigerator compartment 12 can be used to melt the frost that may be generated inside the return air duct 20, thereby avoiding severe icing or frosting inside the return air duct 20.

[0093] In other words, after step S24, as the cooling airflow is continuously input, the temperature in the refrigerator compartment 12 and the first variable temperature compartment 13 continuously decreases. When the temperature in the refrigerator compartment 12 decreases to the preset temperature value and the first variable temperature compartment 13 is set to the freezing position, the refrigerator compartment 12 and the first variable temperature compartment 13 can be controlled to alternately cool.

[0094] Specifically, Figure 9This 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:

[0095] Step S10: Obtain the status of the cold storage compartment 12 and the first variable temperature compartment 13;

[0096] 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 cooling state, proceed to step S24.

[0097] Step S22: Adjust the wind deflector 21 to the second state;

[0098] Step S23: Adjust the wind deflector 21 to the first state;

[0099] Step S24: Adjust the wind deflector 21 to the third state;

[0100] Step S30: When the first variable temperature compartment 13 is in the freezing position, obtain the measured temperature inside the refrigerator compartment 12;

[0101] Step S40: Determine whether the measured temperature inside the cold storage compartment 12 has reached the preset temperature value; if yes, proceed to step S50; if no, return to step S30 to obtain the measured temperature inside the cold storage compartment 12 again.

[0102] Step S50: Control the cold storage compartment 12 and the first variable temperature compartment 13 to alternately cool.

[0103] Furthermore, the aforementioned preset temperature value can be the average of the set shutdown point temperature and the set startup point temperature within the refrigerator compartment 12. At this point, the temperature within the refrigerator compartment 12 has already decreased to a certain level, indicating that the refrigeration of the refrigerator compartment 12 and the first variable temperature compartment 13 has been ongoing for some time. Switching to alternating refrigeration between the refrigerator compartment 12 and the first variable temperature compartment 13 at this time will not have a significant impact on their refrigeration performance, making the design more reasonable.

[0104] In some embodiments, a refrigeration damper is provided in the refrigeration air supply duct from the second cooling chamber 152 to the refrigeration chamber 12, and a first temperature-changing damper is provided in the first temperature-changing air supply duct from the second cooling chamber 152 to the first temperature-changing chamber 13.

[0105] In these embodiments, the step of controlling the alternating cooling of the refrigeration compartment 12 and the first variable temperature compartment 13 may specifically include: alternately executing the refrigeration program and the first variable temperature program according to a preset time cycle.

[0106] In the refrigeration process, the refrigeration damper is opened, the first variable temperature damper 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 process continues for a first preset time, the first variable temperature cooling process is executed.

[0107] In the first variable-temperature refrigeration program, the refrigeration damper is closed, the first variable-temperature damper is opened, and the baffle plate 21 is adjusted to the first state to achieve airflow circulation between the first variable-temperature chamber 13 and the second cooling chamber 152, thereby providing normal cooling for the first variable-temperature chamber 13. After the first variable-temperature refrigeration program has been running for a second preset time, the refrigeration program is executed.

[0108] In some embodiments, the second cooling chamber 152 is provided with a blower 31 for driving airflow to the refrigerated chamber 12 and the first variable temperature chamber 13. In these embodiments, after controlling the alternating cooling of the refrigerated chamber 12 and the first variable temperature chamber 13, the control method of the present invention further includes:

[0109] Obtain the actual number of switching times between the alternating refrigeration of the cold storage compartment 12 and the first variable temperature compartment 13;

[0110] When the actual number of switching reaches the preset number of switching, the speed of the air supply fan 31 is increased.

[0111] 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.

[0112] 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:

[0113] 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.

[0114] The present invention also provides a refrigeration and freezing device 1. Figure 10 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 baffle plate 21, and a control device 90 electrically connected to the baffle plate 21.

[0115] The enclosure 10 defines at least a refrigerated compartment 12 for storing items and a first variable-temperature compartment 13, as well as a second cooling compartment 152 for providing cooling to the refrigerated compartment 12 and the first variable-temperature compartment 13. Return airflow from the refrigerated compartment 12 and the first variable-temperature compartment 13 returns to the second cooling compartment 152 via the same return air duct 20. A baffle 21 is disposed within the return air duct 20 and has a first state that allows the first variable-temperature compartment 13 and the return air duct 20 to pass through while blocking the refrigerated compartment 12 and the return air duct 20, and a second state that allows the refrigerated compartment 12 and the return air duct 20 to pass through while blocking the first variable-temperature compartment 13 and the return air duct 20.

[0116] 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.

[0117] The refrigeration and freezing apparatus 1 of the present invention uses a return air duct 20 to return air to the refrigeration compartment 12 and the first variable temperature compartment 13, reducing the number of return air ducts 20 and the space occupied by the return air ducts, simplifying the process and reducing costs. Furthermore, by installing a baffle 21 inside the return air duct 20 and controlling it appropriately, the refrigeration and freezing apparatus 1 of the present invention can effectively avoid cross-ventilation between the refrigeration compartment 12 and the first variable temperature compartment 13 due to the use of the same return air duct 20, thereby preventing large temperature fluctuations in the refrigeration compartment 12 and the first variable temperature compartment 13, and making condensation or frost formation less likely in the refrigeration compartment 12 and the first variable temperature compartment 13.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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 at least a refrigeration compartment for storing items and a first variable temperature compartment, and a second cooling compartment for providing cooling capacity to the refrigeration compartment and the first variable temperature compartment; return airflow in the refrigeration compartment and the first variable temperature compartment returns to the second cooling compartment through the same return air duct, the return air duct being provided with a baffle plate, the baffle plate having a first state of opening the first variable temperature compartment and the return air duct while blocking the refrigeration compartment and the return air duct, and a second state of opening the refrigeration compartment and the return air duct while blocking the first variable temperature compartment and the return air duct; And the control method includes: When the cold storage room is in a refrigerated state and the first variable temperature room is in a non-refrigerated state, the baffle is adjusted to the second state; When the first variable temperature chamber is in a cooling state and the cold storage chamber is in a non-cooling state, the baffle plate is adjusted to the first state; The second cooling chamber is equipped with an evaporator and a blower for driving airflow to the cold storage compartment and the first variable temperature compartment; and the control method further includes: When both the cold storage room and the first variable temperature room are in a non-cooling state, the set temperature of the cold storage room and the first variable temperature room is obtained; If the set temperature of the cold storage room is lower than the set temperature of the first variable temperature room, the baffle plate is adjusted to the first state and the air supply fan is started. If the set temperature of the cold storage room is higher than the set temperature of the first variable temperature room, the baffle is adjusted to the second state and the air supply fan is started.

2. The control method according to claim 1, wherein The baffle plate also has a third state, which connects the first temperature-controlled compartment and the return air duct, and also connects the refrigerated compartment and the return air duct; and The control method further includes: When both the cold storage room and the first variable temperature room are in a cooling state, the baffle is adjusted to the third state.

3. The control method according to claim 1, wherein... A refrigeration damper is provided in the refrigeration air supply duct from the second cooling chamber to the refrigeration room, and a first temperature-changing damper is provided in the first temperature-changing air supply duct from the second cooling chamber to the first temperature-changing room. and When the cold storage compartment is in a refrigeration state and the first variable temperature compartment is in a non-refrigeration state, the control method further includes: controlling the cold storage damper to open and controlling the first variable temperature damper to close. When the first variable temperature chamber is in a cooling state and the refrigeration chamber is in a non-cooling state, the control method further includes: controlling the refrigeration damper to close and controlling the first variable temperature damper to open.

4. The control method according to claim 1 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.

5. The control method according to claim 4, wherein The second cooling chamber is equipped with a blower for driving air supply to the cold storage chamber and the first variable temperature chamber; 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 operations reaches the preset number of switching operations, the rotational speed of the air supply fan is increased.

6. The control method according to claim 4, 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.

7. The control method according to claim 4, wherein A refrigeration damper is provided in the refrigeration air supply duct from the second cooling chamber to the refrigeration room, and a first temperature-changing damper is provided in the first temperature-changing air supply duct from the second cooling chamber to the first temperature-changing room. and The steps of controlling the alternating cooling of the cold storage compartment and the first variable temperature compartment include: The refrigeration and first variable-temperature refrigeration programs are executed alternately according to a preset time cycle; among which... In the refrigeration program, the refrigeration damper is opened, the first temperature-changing damper is closed, and the baffle is adjusted to the second state. After the refrigeration program lasts for a first preset time, the first temperature-changing refrigeration program is executed. 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 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.

8. The control method according to claim 4, wherein The preset temperature value is the average of the set shutdown temperature and the set startup temperature inside the cold storage room.

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

Images