Refrigerator and control method

Abstract

The invention provides a refrigerator and a control method. The refrigerator comprises a refrigerator body, an air duct assembly, a refrigerating device and a control device. The box body comprises a first chamber and a second chamber; the air duct assembly is located on a partition plate between the first chamber and the second chamber. The refrigerating device comprises a compressor, a condenser, an electric switching valve, a first capillary tube, a second capillary tube and an evaporator. The evaporator is located in a partition plate between the first chamber and the second chamber. The control device comprises a first sensor, a second sensor, a third sensor arranged on the evaporator and a controller. An evaporator is arranged between two chambers, the evaporator does not occupy the volume space of the refrigerator independently, the two chambers are provided with an air flue, an air inlet door, an air return door and an electric switching valve respectively, a control system is matched to control a compressor and a refrigeration rotating speed fan, and the switching valve controls system flow and opening and closing of the air doors. The refrigerating chamber and the freezing chamber are independently and efficiently refrigerated, a refrigerating air duct device is reduced, and the volume ratio of the refrigerator is large.

Description

Technical Field

[0001] The present application relates to the field of household appliance technology, and in particular to a refrigerator and a control method thereof. Background Art

[0002] With the development of technology and the improvement of people's living standards, refrigerators have become a necessity in every household. Currently, most refrigerators are air-cooled, which uses fans to circulate air for cooling. In air-cooled refrigerators, the cooler lowers the temperature inside the refrigerator by blowing cold air from the fan. This cool air is evenly distributed throughout the refrigerator, achieving overall cooling.

[0003] Air-cooled refrigerators on the market fall into two types: single-system and multi-system (the most common being dual-system). In a single-system refrigerator, the refrigerant evaporator is located in the freezer compartment. The refrigerant flows through the compressor, condenser, capillary tube, and evaporator, returning to the compressor, completing the refrigeration cycle. The advantages of a single-system air-cooled refrigerator are its relatively small refrigeration duct volume, which allows for more usable refrigerator space and reduces costs. However, its disadvantages are its relatively low refrigeration efficiency, which is not conducive to energy conservation. Furthermore, the humidity in the refrigerator compartment is low, reaching only 15-40% relative humidity when the refrigerator is operating unloaded, which is detrimental to fresh food. A dual-system air-cooled refrigerator has an evaporator in each compartment, with a switching valve switching the operation of the evaporator separately. The advantage is that the switching valve can be switched to the evaporator side. Due to the significant temperature difference between the refrigerator and freezer compartments, the dual-circuit system maintains optimal thermodynamic efficiency in the refrigerator compartment and the freezer compartment, respectively.

[0004] However, in order to meet the different cooling needs of different compartments, the current dual-system air-cooled refrigerator needs to install a refrigeration component in each compartment. The refrigeration duct component occupies a large volume, resulting in a reduction in the effective space of the refrigerator, which affects the user experience. Summary of the Invention

[0005] The present application provides a refrigerator and a control method to solve the problem that in current dual-system air-cooled refrigerators, in order to meet the different cooling needs of different compartments, a refrigeration component needs to be installed in each compartment, and the refrigeration duct component occupies a large volume, resulting in a reduction in the effective space of the refrigerator and affecting the user experience.

[0006] In a first aspect, the present application provides a refrigerator, comprising:

[0007] The box body includes a first chamber and a second chamber;

[0008] An air duct assembly is located at the partition between the first chamber and the second chamber; the air duct assembly includes an air duct component, a partition component, and a refrigeration fan; the partition component includes a first partition component and a second partition component, and the air duct component includes a first air duct component and a second air duct component; a first air inlet damper is provided at the connection between the first air duct component and the first partition component, and a first air return damper is provided on the other side of the first partition component; a second air inlet damper is provided at the connection between the second air duct component and the second partition component;

[0009] A refrigeration device comprising a compressor, a condenser, an electric switching valve, a first capillary tube, a second capillary tube, and an evaporator; the evaporator is located in a partition between the first chamber and the second chamber; the flow rate of the second capillary tube is higher than that of the first capillary tube;

[0010] The control device includes a first sensor disposed in the first chamber, a second sensor disposed in the second chamber, a third sensor disposed on the evaporator, and a controller; the controller is electrically connected to the first sensor, the second sensor, the third sensor, the electric switching valve, the compressor, the refrigeration fan, the first air inlet damper, the first return air damper, and the second air inlet damper.

[0011] In some possible implementations, the first partition member and the first air duct member limit the flow of the first compartment, the first air inlet, the first air outlet, and the first return air outlet; the second partition member and the second air duct member limit the flow of the second compartment, the second air inlet, the second air outlet, and the second return air outlet; the first air inlet, the first air outlet, the first compartment, and the first return air outlet are connected; and the second air inlet, the second air outlet, the second compartment, and the second return air outlet are connected.

[0012] In some possible implementations, the first partition member and the second partition member have a thermal insulation layer.

[0013] In some possible implementations, the partition member closely cooperates with the periphery of the evaporator to form an air flow heat exchange space, so that when the refrigeration fan drives the evaporator to exchange heat, the cold energy is delivered to the first chamber and the second chamber.

[0014] In some possible implementations, the first baffle member is tightly fitted with the lower portion of the evaporator, the second baffle member is tightly fitted with the upper portion of the evaporator, and the horizontal plane of the evaporator maintains an inclined downward angle with the horizontal plane.

[0015] In a second aspect, the present application provides a refrigerator control method, the control method being applied to the refrigerator according to the first aspect, the control method comprising:

[0016] Get the first temperature T displayed by the first sensor d , and the second temperature T displayed by the second sensorc ;

[0017] At the second temperature T c Greater than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Less than the first refrigeration start-up point temperature T d 0n When the third temperature T displayed by the third sensor is obtained z ;

[0018] At the third temperature T z When the temperature is less than or equal to the preset temperature, the refrigeration fan is controlled to start and run at the first speed, the second air inlet damper is opened, the first air inlet damper and the first return air damper remain closed, and the refrigeration and humidification mode is started; otherwise, the compressor is controlled to start, the electric switching valve is switched to the second capillary tube, the refrigeration fan is operated at the second speed, the second air inlet damper remains open, and the refrigeration and cooling mode is started;

[0019] At the second temperature T c Less than or equal to the second refrigeration shutdown point temperature T c 0ff When the second air inlet damper is closed, the refrigeration mode is turned off, the electric switching valve is switched to the first capillary tube, the freezing and refrigeration mode is started, and the refrigeration fan runs at the second speed;

[0020] At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the temperature is low, turn off the compressor, close the first air inlet damper and the first return air damper, and turn off the freezing and refrigeration mode;

[0021] At the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet damper is closed, and the refrigeration and humidification mode is turned off.

[0022] In some possible implementations, after obtaining the first temperature Td displayed by the first sensor and the second temperature Tc displayed by the second sensor, the method further includes:

[0023] The second temperature T c The second refrigeration start point temperature T c 0n For comparison, the first temperature T d The first refrigeration start point temperature T d 0n ;

[0024] At the second temperature T c Greater than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than the first refrigeration start-up point temperature T d 0n When the refrigeration mode is activated;

[0025] At the second temperature T c Greater than the second refrigeration shutdown point temperature T c 0ff , and the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than the first refrigeration start-up point temperature T d 0n , the freezing and cooling mode is activated.

[0026] In some possible implementations, the method further includes:

[0027] At the second temperature T c Greater than or equal to the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than or equal to the first refrigeration start-up point temperature T d 0n When the compressor starts, the electric switching valve switches to the second capillary tube, the refrigeration fan starts and runs at the second speed, the second air inlet damper opens, and the refrigeration mode is started;

[0028] Determine the third temperature T z Is it less than or equal to the first refrigeration start-up point temperature T d 0n -3; If yes, the electric switching valve switches to the first capillary tube, the first air inlet damper and the first return air damper are opened, and the freezing and refrigeration mode is started;

[0029] At the second temperature T c Less than or equal to the second refrigeration shutdown point temperature T c 0ff When the second air inlet door is closed, the refrigeration mode is turned off;

[0030] At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the temperature is low, turn off the compressor, close the first air inlet damper and the first return air damper, and turn off the freezing and refrigeration mode;

[0031] At the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet damper is closed, and the refrigeration and humidification mode is turned off.

[0032] In some possible implementations, the method further includes:

[0033] At the second temperature T c Greater than the second refrigeration shutdown point temperature T c 0ff , and the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than or equal to the first refrigeration start-up point temperature T d 0n When the compressor starts, the electric switching valve switches to the first capillary tube, the first air inlet damper and the first return air damper are opened, and the second air inlet damper is closed, and the freezing and refrigeration mode is started;

[0034] At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the temperature is low, turn off the compressor, close the first air inlet damper and the first return air damper, and turn off the freezing and refrigeration mode;

[0035] At the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet damper is closed, and the refrigeration and humidification mode is turned off.

[0036] In some possible implementations, the preset temperature is greater than -5°C and less than 1°C.

[0037] As can be seen from the above, the present application provides a refrigerator and control method, comprising a housing, an air duct assembly, a refrigeration device, and a control device. The housing comprises a first compartment and a second compartment; the air duct assembly is located on a partition between the first and second compartments; the refrigeration device comprises a compressor, a condenser, an electric switching valve, a first capillary tube, a second capillary tube, and an evaporator; the evaporator is located within the partition between the first and second compartments; and the control device comprises a first sensor disposed within the first compartment, a second sensor disposed within the second compartment, a third sensor disposed on the evaporator, and a controller. By locating the evaporator between the two compartments, the evaporator does not occupy any space in the refrigerator. The present invention further provides air ducts, inlet and return air dampers in each compartment, and an electric switching valve in conjunction with a control system to control the compressor, the cooling speed of the fan, and the switching valve to control the system flow and the opening and closing of each damper, thereby achieving independent and efficient refrigeration of the refrigerator and freezer compartments, achieving the efficiency of a dual-system thermodynamic cycle with a single evaporator. Compared to a dual-circulation air-cooled refrigerator, the refrigeration air duct assembly is reduced, and the refrigerator volume ratio is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A schematic diagram of the structure of a refrigerator provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of a refrigerator refrigeration system according to an embodiment of the present application;

[0041] Figure 3 This is a flow chart of the refrigerator control method provided in an embodiment of the present application.

[0042] Illustration:

[0043] 1-first chamber; 2-second chamber; 3-evaporator; 4-partition component; 41-first partition; 42-second partition; 5-first air duct component; 51-first air inlet; 52-first air outlet; 53-first return air outlet; 6-second air duct component; 61-second air inlet; 62-second air outlet; 63-second return air outlet; 7-refrigeration fan; 8-first air inlet damper; 9-first return air damper; 10-second air inlet damper. DETAILED DESCRIPTION

[0044] The following embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numbers in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following embodiments are not intended to represent all possible implementations consistent with the present application. They are merely examples of systems and methods consistent with certain aspects of the present application, as detailed in the claims.

[0045] With the development of technology and the improvement of people's living standards, refrigerators have become a necessity in every household. Currently, most refrigerators are air-cooled, which uses fans to circulate air for cooling. In air-cooled refrigerators, the cooler lowers the temperature inside the refrigerator by blowing cold air from the fan. This cool air is evenly distributed throughout the refrigerator, achieving overall cooling.

[0046] Air-cooled refrigerators on the market fall into two types: single-system and multi-system (the most common being dual-system). In a single-system refrigerator, the refrigerant evaporator is located in the freezer compartment. The refrigerant flows through the compressor, condenser, capillary tube, and evaporator, returning to the compressor, completing the refrigeration cycle. The advantages of a single-system air-cooled refrigerator are its relatively small refrigeration duct volume, which allows for more usable refrigerator space and reduces costs. However, its disadvantages are its relatively low refrigeration efficiency, which is not conducive to energy conservation. Furthermore, the humidity in the refrigerator compartment is low, reaching only 15-40% relative humidity when the refrigerator is operating unloaded, which is detrimental to fresh food. A dual-system air-cooled refrigerator has an evaporator in each compartment, with a switching valve switching the operation of the evaporator separately. The advantage is that the switching valve can be switched to the evaporator side. Due to the significant temperature difference between the refrigerator and freezer compartments, the dual-circuit system maintains optimal thermodynamic efficiency in the refrigerator compartment and the freezer compartment, respectively.

[0047] However, in order to meet the different cooling needs of different compartments, the current dual-system air-cooled refrigerator needs to install a refrigeration component in each compartment. The refrigeration duct component occupies a large volume, resulting in a reduction in the effective space of the refrigerator, which affects the user experience.

[0048] Based on this, the present application provides a refrigerator and a control method. Through innovative design, the evaporator is set between the two compartments, the air duct heat exchange component is innovatively designed and multiple dampers are set therein, the heat exchanger cavity and the partition component are designed to be insulated and sealed, and an electric switching valve is set in the refrigeration system. Combined with the refrigeration characteristics of the refrigerator, when different refrigeration needs are met, the switching of multiple dampers and the electric switching valve is controlled, and the cooling capacity of the evaporator is adjusted according to the cooling capacity demand of each compartment and the cooling capacity transfer characteristics of the two compartments. By using multiple damper switching and variable fan speed, the electric valve and compressor can be flexibly controlled to control the flow of the refrigeration system, adapt to changes in the working conditions of the refrigeration system, improve the thermal cycle efficiency under different refrigeration needs, realize independent and efficient refrigeration of the refrigeration and freezing compartments, and achieve the function of a single evaporator to achieve dual circulation. Compared with the existing single evaporator technology, it has better energy saving and moisturizing effects.

[0049] like Figure 1 As shown, a refrigerator according to an embodiment of the present invention comprises a housing, an air duct assembly, a refrigeration device, and a control device. In this embodiment, the housing includes a heat-insulated enclosure defining at least two compartments: a first compartment 1 and a second compartment 2. The air duct assembly according to this embodiment of the present invention is located on a partition between the first compartment 1 and the second compartment 2, and includes a partition member 4, a refrigeration fan 7, and an evaporator 3. The partition component 4 includes a first partition component 41 and a second partition component 42, and the air duct component includes a first air duct component 5 and a second air duct component 6; the first partition component 41 and the first air duct component 5 limit the first chamber 1, the first air inlet 51, the first air outlet 52 and the first return air outlet 53, and the first air inlet 51, the first air outlet 52, the first chamber 1 and the first return air outlet 53 are connected; the second partition component 42 and the second air duct component 6 limit the second chamber 2, the second air inlet 61, the second air outlet 62 and the second return air outlet 63, and the second air inlet 61, the second air outlet 62, the second chamber 2 and the second return air outlet 63 are connected.

[0050] In this embodiment, the partition member 4 cooperates with the evaporator 3 to form an air flow heat exchange space. The evaporator is driven by the refrigeration fan 7 to exchange heat and send the cold energy to each room for cooling.

[0051] The air duct components 5 and 6 of this embodiment include a first air inlet damper 8 provided at the connection between the first compartment air duct component 5 and the first partition component 41, i.e., at the first air inlet 51, and a first return air damper 9 provided on the other side of the first partition 41; a second air inlet damper 10 provided at the connection between the second air duct component 6 and the second partition component 42, i.e., at the second air inlet 61;

[0052] As attached Figure 2, the refrigeration principle diagram of this embodiment, the refrigeration device consists of a compressor, an evaporator, a capillary tube, a filter, and a condenser; the evaporator 3 is located at the partition between the first chamber 1 and the second chamber 2. The capillary tube includes a first capillary tube and a second capillary tube.

[0053] The control device includes a first sensor disposed in the first chamber, a second sensor disposed in the second chamber, a third sensor disposed on the evaporator, and a controller; the controller is electrically connected to the first sensor, the second sensor, the third sensor, the electric switching valve, the compressor, the refrigeration fan, the first air inlet damper, the first return air damper, and the second air inlet damper.

[0054] The first sensor is arranged in the first chamber and is used to detect the temperature of the first chamber; the second sensor is arranged in the second chamber and is used to detect the temperature of the second chamber; the third sensor is arranged on the evaporator and is used to detect the evaporator temperature; the controller is arranged on the surface of the box, is electrically connected to the temperature sensor, the compressor, the refrigeration fan and the damper, and controls the operation of the compressor, the refrigeration fan and the damper.

[0055] In some embodiments, the first partition member and the second partition member have a thermal insulation layer.

[0056] The first partition member and the second partition member have a thermal insulation layer, and polyurethane is used for thermal insulation in this embodiment.

[0057] In some embodiments, the first baffle member is tightly fitted with the lower portion of the evaporator, the second baffle member is tightly fitted with the upper portion of the evaporator, and the horizontal plane of the evaporator is tilted downwardly with respect to the horizontal plane.

[0058] In the refrigerator and control method described in this embodiment, the first partition component is tightly fitted with the lower part of the evaporator, and the second partition is tightly fitted with the upper part of the evaporator, and the horizontal plane of the evaporator is tilted downwardly with respect to the horizontal plane. In this embodiment, the downward tilt angle is 7°.

[0059] In some embodiments, the first room temperature zone is a freezing temperature zone (-6 to -24°C), and the second room temperature zone is a refrigeration temperature zone (0 to 10°C); in this embodiment, the second capillary has a higher flow rate than the first capillary; in this embodiment, the first capillary flow rate is 3.1 to 3.7 L / min, and the second capillary flow rate is 4.1 to 5.2 L / min; in this embodiment, the first capillary flow rate is selected as 3.5 L / min, and the second capillary flow rate is selected as 5.1 L / min.

[0060] The present invention addresses the shortcomings of existing single-cycle and dual-cycle air-cooled refrigerators. Through innovative design, the evaporator is placed between the freezer and refrigerator compartments. The evaporator does not occupy the refrigerator's volume space alone. Taking advantage of the evaporator being placed between the two compartments, the two compartments are further provided with air ducts, air inlet dampers, and return air dampers, and electric switching valves. Together with the control system, the compressor, the refrigeration fan speed, and the opening and closing of each damper are controlled, and the flow rate of the refrigeration system in different states is controlled by the switching valve. On the one hand, compared to single-system air-cooled refrigerators, the refrigerator and freezer compartments can be cooled independently and efficiently, and more efficient thermal cycle efficiency can be achieved through flow control, resulting in good energy-saving effects. At the same time, the humidity in the refrigerator compartment is further increased, improving the preservation of fruits and vegetables. On the other hand, compared to existing dual-cycle technology, the refrigeration duct device is reduced, the refrigerator volume ratio is large, and the cost-effectiveness is high.

[0061] In some embodiments, Figure 3 As shown, the present application also provides a refrigerator control method, which is applied to the refrigerator provided in the above embodiment.

[0062] The control method includes:

[0063] Get the first temperature T displayed by the first sensor d , and the second temperature T displayed by the second sensor c ;

[0064] At the second temperature T c Greater than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Less than the first refrigeration start-up point temperature T d 0n When the third temperature T displayed by the third sensor is obtained z ;

[0065] At the third temperature T z When the temperature is less than or equal to the preset temperature, the refrigeration fan is controlled to start and run at the first speed, the second air inlet damper is opened, the first air inlet damper and the first return air damper remain closed, and the refrigeration and humidification mode is started; otherwise, the compressor is controlled to start, the electric switching valve is switched to the second capillary tube, the refrigeration fan is operated at the second speed, the second air inlet damper remains open, and the refrigeration and cooling mode is started;

[0066] At the second temperature T c Less than or equal to the second refrigeration shutdown point temperature T c 0ff When the second air inlet damper is closed, the refrigeration mode is turned off, the electric switching valve is switched to the first capillary tube, the freezing and refrigeration mode is started, and the refrigeration fan runs at the second speed;

[0067] At the first temperature Td Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the temperature is low, turn off the compressor, close the first air inlet damper and the first return air damper, and turn off the freezing and refrigeration mode;

[0068] At the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet damper is closed, and the refrigeration and humidification mode is turned off.

[0069] In some embodiments, after obtaining the first temperature Td displayed by the first sensor and the second temperature Tc displayed by the second sensor, the method further includes:

[0070] The second temperature T c The second refrigeration start point temperature T c 0n For comparison, the first temperature T d The first refrigeration start point temperature T d 0n ;

[0071] At the second temperature T c Greater than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than the first refrigeration start-up point temperature T d 0n When the refrigeration mode is activated;

[0072] At the second temperature T c Greater than the second refrigeration shutdown point temperature T c 0ff , and the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than the first refrigeration start-up point temperature T d 0n , the freezing and cooling mode is activated.

[0073] In some embodiments, the method further comprises:

[0074] At the second temperature T c Greater than or equal to the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than or equal to the first refrigeration start-up point temperature T d0n When the compressor starts, the electric switching valve switches to the second capillary tube, the refrigeration fan starts and runs at the second speed, the second air inlet damper opens, and the refrigeration mode is started;

[0075] Determine the third temperature T z Is it less than or equal to the first refrigeration start-up point temperature T d 0n -3; If yes, the electric switching valve switches to the first capillary tube, the first air inlet damper and the first return air damper are opened, and the freezing and refrigeration mode is started;

[0076] At the second temperature T c Less than or equal to the second refrigeration shutdown point temperature T c 0ff When the second air inlet door is closed, the refrigeration mode is turned off;

[0077] At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the temperature is low, turn off the compressor, close the first air inlet damper and the first return air damper, and turn off the freezing and refrigeration mode;

[0078] At the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet damper is closed, and the refrigeration and humidification mode is turned off.

[0079] In some embodiments, the method further comprises:

[0080] At the second temperature T c Greater than the second refrigeration shutdown point temperature T c 0ff , and the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the first temperature T d Greater than or equal to the first refrigeration start-up point temperature T d 0n When the compressor starts, the electric switching valve switches to the first capillary tube, the first air inlet damper and the first return air damper are opened, and the second air inlet damper is closed, and the freezing and refrigeration mode is started;

[0081] At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the temperature is low, turn off the compressor, close the first air inlet damper and the first return air damper, and turn off the freezing and refrigeration mode;

[0082] At the second temperature T c Less than the second refrigeration start-up point temperature T c 0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet damper is closed, and the refrigeration and humidification mode is turned off.

[0083] In some embodiments, the preset temperature is greater than -5°C and less than 1°C.

[0084] In some embodiments, the first rotation speed is 800-1200 RPM, and the second rotation speed is 1600-2000 RPM.

[0085] Example

[0086] S1: Power on and collect the temperature of the refrigerated compartment temperature sensor Tc and the freezer compartment temperature sensor Td;

[0087] (1) When Tc≥Tc on and Td<Td on, go to S2;

[0088] (2) When Tc ≥ Tc on and Td ≥ Td on, go to S21;

[0089] (3) When Tc off < Tc < Tc on and Td ≥ Td on, go to S22.

[0090] S2: Check the evaporation sensor Tz≤m. If so, the refrigeration fan starts and runs at a low speed, the second air supply damper opens, the first air supply damper and the first return air damper remain closed, and the refrigerator compartment is humidified; if not, the compressor starts, the refrigeration fan starts, the second air inlet damper opens, and the refrigerator starts cooling, and then go to S3;

[0091] S21: The compressor switches the switching valve to capillary tube 2, the refrigeration fan starts running at a high speed, the second air inlet damper opens, the refrigeration starts, and the process goes to S21-1;

[0092] S21-1: Detect and determine if the evaporation sensor Tz≤Td on-3. If so, switch the valve to capillary 1, open the first air inlet damper and the first return air damper, and start refrigeration. If not, wait for refrigeration until the evaporation sensor Tz≤Td on-3, and if so, start refrigeration;

[0093] S21-2: Detect and determine whether Tc ≤ Tc off. If so, close the second air inlet damper and stop refrigeration. If not, return to S21.

[0094] S21-3: Td≤Td off, if yes, go to S4, if no, go back to S21-1;

[0095] S22: The compressor starts, the switching valve switches to capillary 1, the first air inlet damper and the first return air damper are opened, and the second damper is closed, and refrigeration is performed;

[0096] S22-1: Detect and judge whether Td≤Td off. If yes, go to S5; if not, go to S22;

[0097] S3: Detect and judge Tc≤Tc off. If so, go to S4. If not, maintain the cooling state until Tc≤Tc off is satisfied. The second air inlet damper is closed and the refrigerator stops cooling. The electric switching valve switches to capillary 1, and the freezer starts cooling. The fan keeps running at a high speed.

[0098] S4: Detect and determine Td≤Td off. If so, turn off the compressor, close the first air supply damper and the first return air damper, and stop refrigeration;

[0099] S5: Detect and judge whether Tc is less than Tc on. If so, judge whether the evaporation sensor Tz is less than or equal to m. If not, return to S1.

[0100] S6: Determine if the evaporation sensor Tz is less than or equal to m. If so, the refrigeration fan starts and switches to low speed operation. The second air supply damper opens, the first air supply damper and the first return air damper remain closed, and the refrigerator compartment is humidified. If not, go to S7.

[0101] S7: The refrigeration fan is turned off, the second air supply damper is closed, and the refrigeration stops humidifying.

[0102] In the refrigerator and control method described in this embodiment, the -5°C ≤ m ≤ 1°C, and preferably in this embodiment, m is -2°C.

[0103] In this embodiment, the low speed (first speed) of the fan ranges from 800 to 1200 RPM, and the high speed (second speed) ranges from 1600 to 2000 RPM.

[0104] As can be seen from the above embodiments, the present application provides a refrigerator and control method, comprising a housing, an air duct assembly, a refrigeration device, and a control device. The housing comprises a first compartment and a second compartment; the air duct assembly is located on a partition between the first and second compartments; the refrigeration device comprises a compressor, a condenser, an electric switching valve, a first capillary tube, a second capillary tube, and an evaporator; the evaporator is located within the partition between the first and second compartments; and the control device comprises a first sensor disposed within the first compartment, a second sensor disposed within the second compartment, a third sensor disposed on the evaporator, and a controller. By locating the evaporator between the two compartments, the evaporator does not occupy any space within the refrigerator. The present invention further provides air ducts, inlet and return air dampers, and an electric switching valve in each compartment. The control system controls the compressor, the cooling speed of the fan, and the switching valve to control the system flow and the opening and closing of each damper, thereby achieving independent and efficient refrigeration of the refrigerator and freezer compartments. This achieves the efficiency of a dual-system thermodynamic cycle with a single evaporator. Compared to a dual-circulation air-cooled refrigerator, the refrigeration air duct assembly is reduced, and the refrigerator volume ratio is increased.

[0105] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without expending creative work shall fall within the scope of protection of this application.

Claims

1. A refrigerator, characterized in that: The refrigerator comprises: The box body comprises a first chamber and a second chamber; An air duct assembly is located at the partition between the first chamber and the second chamber; the air duct assembly includes an air duct component, a partition component, and a refrigeration fan; the partition component includes a first partition component and a second partition component, and the air duct component includes a first air duct component and a second air duct component; a first air inlet damper is arranged at the connection between the first air duct component and the first partition component, and a first air return damper is arranged on the other side of the first partition component; a second air inlet damper is arranged at the connection between the second air duct component and the second partition component; A refrigeration device, comprising a compressor, a condenser, an electric switching valve, a first capillary tube, a second capillary tube and an evaporator; the evaporator is located in a partition between the first chamber and the second chamber; the flow rate of the second capillary tube is higher than that of the first capillary tube; The control device comprises a first sensor arranged in the first chamber, a second sensor arranged in the second chamber, a third sensor arranged on the evaporator and a controller; the controller is electrically connected to the first sensor, the second sensor, the third sensor, the electric switching valve, the compressor, the refrigeration fan, the first air inlet damper, the first return air damper and the second air inlet damper.

2. The refrigerator according to claim 1, characterized in that: The first baffle component and the first air duct component limit the first chamber, the first air inlet, the first air outlet and the first return air outlet; the second baffle component and the second air duct component limit the second chamber, the second air inlet, the second air outlet and the second return air outlet; the first air inlet, the first air outlet, the first chamber and the first return air outlet are connected; the second air inlet, the second air outlet, the second chamber and the second return air outlet are connected.

3. The refrigerator according to claim 1, characterized in that: The first partition member and the second partition member have a thermal insulation layer.

4. The refrigerator according to claim 1, characterized in that: The partition member is closely matched with the periphery of the evaporator to form an air flow heat exchange space, so that when the refrigeration fan drives the evaporator to exchange heat, the cold energy is delivered to the first chamber and the second chamber.

5. The refrigerator according to claim 4, characterized in that: The first baffle member is tightly matched with the lower part of the evaporator, the second baffle member is tightly matched with the upper part of the evaporator, and the horizontal plane of the evaporator maintains an inclined downward angle with the horizontal plane.

6. A refrigerator control method, characterized in that: The control method is used for the refrigerator according to any one of claims 1 to 5, and the control method comprises: Get the first temperature T displayed by the first sensor d , and the second temperature T displayed by the second sensor c ; At the second temperature T c Greater than the second refrigeration start-up point temperature T c0n , and the first temperature T d Less than the first refrigeration start-up point temperature T d0n When the third temperature T displayed by the third sensor is obtained z ; At the third temperature T z When the temperature is less than or equal to the preset temperature, the refrigeration fan is controlled to start and run at the first speed, the second air inlet damper is opened, the first air inlet damper and the first return air damper remain closed, and the refrigeration and humidification mode is turned on; otherwise, the compressor is controlled to start, the electric switching valve is switched to the second capillary tube, the refrigeration fan runs at the second speed, the second air inlet damper remains open, and the refrigeration and cooling mode is started; At the second temperature T c Less than or equal to the second refrigeration shutdown point temperature T c0ff When the second air inlet damper is closed, the refrigeration mode is turned off, the electric switching valve is switched to the first capillary tube, the freezing mode is started, and the refrigeration fan runs at the second speed; At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d0ff When the compressor is turned off, the first air inlet damper and the first return air damper are closed, and the freezing and refrigeration mode is turned off; At the second temperature T c Less than the second refrigeration start-up point temperature T c0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet door is closed, and the refrigeration and humidification mode is turned off.

7. The control method according to claim 6, characterized in that: After obtaining the first temperature Td displayed by the first sensor and the second temperature Tc displayed by the second sensor, the method further includes: The second temperature T c The second refrigeration start point temperature T c0n For comparison, the first temperature T d The first refrigeration start point temperature T d0n ; At the second temperature T c Greater than the second refrigeration start-up point temperature T c0n , and the first temperature T d Greater than the first refrigeration start-up point temperature T d0n , start the refrigeration mode; At the second temperature T c Greater than the second refrigeration shutdown point temperature T c0ff , and the second temperature T c Less than the second refrigeration start-up point temperature T c0n , and the first temperature T d Greater than the first refrigeration start-up point temperature T d0n , the freezing and cooling mode is activated.

8. The control method according to claim 7, characterized in that: The method further comprises: At the second temperature T c Greater than or equal to the second refrigeration start-up point temperature T c0n , and the first temperature T d Greater than or equal to the first refrigeration start-up point temperature T d0n When the compressor is started, the electric switching valve is switched to the second capillary tube, the refrigeration fan is started and runs at the second speed, the second air inlet damper is opened, and the refrigeration mode is started; Determine the third temperature T z Is it less than or equal to the first refrigeration start-up point temperature T d0n -3; If yes, the electric switching valve switches to the first capillary tube, the first air inlet damper and the first return air damper are opened, and the freezing and refrigeration mode is started; At the second temperature T c Less than or equal to the second refrigeration shutdown point temperature T c0ff When the second air inlet door is closed, the refrigeration mode is turned off; At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d0ff When the compressor is turned off, the first air inlet damper and the first return air damper are closed, and the freezing and refrigeration mode is turned off; At the second temperature T c Less than the second refrigeration start-up point temperature T c0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet door is closed, and the refrigeration and humidification mode is turned off.

9. The control method according to claim 7, characterized in that: The method further comprises: At the second temperature T c Greater than the second refrigeration shutdown point temperature T c0ff , and the second temperature T c Less than the second refrigeration start-up point temperature T c0n , and the first temperature T d Greater than or equal to the first refrigeration start-up point temperature T d0n When the compressor is started, the electric switching valve is switched to the first capillary tube, the first air inlet damper and the first return air damper are opened, and the second air inlet damper is closed, and the freezing and refrigeration mode is started; At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d0ff When the compressor is turned off, the first air inlet damper and the first return air damper are closed, and the freezing and refrigeration mode is turned off; At the second temperature T c Less than the second refrigeration start-up point temperature T c0n , and the third temperature T z When the temperature is greater than the preset value, the cooling fan is turned off, the second air inlet door is closed, and the refrigeration and humidification mode is turned off.

10. The control method according to claim 7, characterized in that: The preset temperature is greater than -5°C and less than 1°C.

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