Refrigerator and control method

Abstract

The application provides a refrigerator and a control method. The refrigerator comprises a cabinet, an air duct assembly, a refrigerating device and a control device. The cabinet comprises a first chamber and a second chamber. The air duct assembly is located at a partition between the first chamber and the second chamber. The refrigerating device comprises a compressor, a condenser, an electric switching valve, a first capillary, a second capillary and an evaporator. The evaporator is located in the partition 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. By arranging the evaporator between the two chambers, the evaporator does not occupy the volume space of the refrigerator alone. The two chambers are respectively provided with air ducts, air inlet dampers and air return dampers, an electric switching valve, a control system, a compressor, a refrigerating speed fan, a switching valve control system flow and various damper opening and closing, so that independent and efficient refrigeration of the refrigerating chamber and the freezing chamber is realized, the refrigerating air duct device is reduced, and the refrigerator volume rate is large.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, and in particular to a refrigerator and a control method. BACKGROUND

[0002] With the development of technology and the improvement of people's living standards, the refrigerator has become a necessity for every family. At present, the refrigerator is mostly air-cooled refrigerator. The air-cooled refrigerator is a refrigerator that uses a fan to circulate air to achieve cooling. In the air-cooled refrigerator, the cooler reduces the temperature inside the refrigerator by blowing cold air out of the fan. This cold air is evenly distributed to each part of the refrigerator, thereby achieving overall refrigeration.

[0003] The air-cooled refrigerator on the market is divided into two types: single system and multi-system air-cooled (the most common is double system) refrigerator. The single system air-cooled refrigerator has a freezing evaporator placed in the freezer compartment. The refrigerant returns to the compressor through the compressor, condenser, capillary tube, freezing evaporator, forming a complete refrigeration cycle. The advantage is that the refrigeration air duct occupies relatively small volume, the refrigerator can use large space, and the cost is low. The disadvantage is that the refrigeration efficiency is relatively low, which is not good for energy saving, and the humidity in the refrigeration compartment is small, the relative humidity in the refrigeration compartment is only 15-40% during the empty running, which is not conducive to the preservation performance. The refrigeration compartment and the freezing compartment of the double system air-cooled refrigerator are provided with an evaporator, and the refrigeration evaporator and the freezing evaporator are switched by a switching valve to work respectively. The advantage is that the switching valve can be switched to the refrigeration evaporator and the freezing evaporator side respectively. Because of the large temperature difference between the refrigeration compartment and the freezing compartment, the double cycle can maintain the optimal thermodynamic cycle efficiency of the refrigeration system in the refrigeration compartment and the optimal thermodynamic cycle efficiency of the refrigeration system in the freezing compartment.

[0004] However, the current double system air-cooled refrigerator needs to set a refrigeration component in each compartment in order to realize different refrigeration requirements of different compartments. The refrigeration air duct component occupies a large volume, which reduces the effective space of the refrigerator and affects the user experience. SUMMARY

[0005] The present application provides a refrigerator and a control method to solve the problem that the current double system air-cooled refrigerator needs to set a refrigeration component in each compartment in order to realize different refrigeration requirements of different compartments. The refrigeration air duct component occupies a large volume, which reduces the effective space of the refrigerator and affects the user experience.

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

[0007] a cabinet comprising a first compartment and a second compartment;

[0008] An air duct assembly is arranged at the partition between the first chamber and the second chamber; the air duct assembly comprises an air duct component, a partition component, and a refrigeration fan; the partition component comprises a first partition component and a second partition component, and the air duct component comprises 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 at 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;

[0009] A 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 arranged in the 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] A 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 with 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 air return damper, and the second air inlet damper.

[0011] In some possible implementation manners, the first partition component and the first air duct component define a first chamber, a first air inlet, a first air outlet, and a first air return; the second partition component and the second air duct component define a second chamber, a second air inlet, a second air outlet, and a second air return; the first air inlet, the first air outlet, the first chamber, and the first air return are in communication; and the second air inlet, the second air outlet, the second chamber, and the second air return are in communication.

[0012] In some possible implementation manners, the first partition component and the second partition component have a heat insulation layer.

[0013] In some possible implementation manners, the partition component and the evaporator are tightly fitted to form an air flow heat exchange space, so that cold energy is sent to the first chamber and the second chamber when the refrigeration fan drives the evaporator to exchange heat.

[0014] In some possible implementation manners, the first partition component is tightly fitted to the lower part of the evaporator, the second partition component is tightly fitted to the upper part of the evaporator, and the horizontal plane of the evaporator is kept at an inclined downward angle.

[0015] In a second aspect, the application provides a control method of a refrigerator, which is used for the refrigerator of the first aspect, and the control method comprises the following steps:

[0016] obtaining a first temperature T d , displayed by the first sensor, and a second temperature Tc ;

[0017] At the second temperature T c Greater than the second refrigeration start-up temperature T c 0n And the first temperature T d Less than the first cooling start-up temperature T d 0n At that time, 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 started and runs at the first speed, the second air inlet damper is opened, and the first air inlet damper and the first return air damper are kept closed, thus starting the refrigeration humidification mode; otherwise, the compressor is started, the electric switching valve is switched to the second capillary tube, the refrigeration fan runs at the second speed, the second air inlet damper is kept open, thus starting the refrigeration cooling mode.

[0019] At the second temperature T c Less than or equal to the second refrigeration shutdown temperature T c 0ff At this time, the second air inlet damper is closed, the refrigeration mode is turned off, the electric switching valve switches to the first capillary tube, the freezing 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 cooling shutdown temperature T d 0ff When the compressor is turned off, the first air inlet damper and the first air return damper are closed, and the refrigeration mode is turned off;

[0021] At the second temperature T c Less than the second refrigeration start-up temperature T c 0n And the third temperature T z When the temperature exceeds the preset temperature, the refrigeration fan will shut off, the second air inlet damper will close, and the refrigeration humidification mode will be 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 With the second refrigeration start-up temperature T c 0n Compare, and, the first temperature T d Temperature T at the first refrigeration start-up point 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 , the refrigeration mode for the refrigeration compartment is started;

[0025] at the second temperature T c greater than the second refrigeration shut-down 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 refrigeration mode for the freezing compartment is started.

[0026] In some possible implementation manners, the method further comprises:

[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 , the compressor is started, the electric switching valve is switched to the second capillary, the refrigeration fan is started to run at the second rotating speed, the second air inlet damper is opened, and the refrigeration mode for the refrigeration compartment is started;

[0028] it is determined whether the third temperature T z is less than or equal to the first refrigeration start-up point temperature T d 0n -3; if yes, the electric switching valve is switched to the first capillary, the first air inlet damper and the first return air damper are opened, and the refrigeration mode for the freezing compartment is started;

[0029] at the second temperature T c less than or equal to the second refrigeration shut-down point temperature T c 0ff , the second air inlet damper is closed, and the refrigeration mode for the refrigeration compartment is shut down;

[0030] at the first temperature T d less than or equal to the first refrigeration shut-down point temperature T d 0ff , the compressor is shut down, the first air inlet damper and the first return air damper are closed, and the refrigeration mode for the freezing compartment is shut down;

[0031] at the second temperature T c less than the second refrigeration startup point temperature T c 0n at the third temperature T z greater than a preset temperature, the refrigeration fan is turned off, the second inlet air damper is closed, and the refrigeration and humidification mode is turned off.

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

[0033] at the second temperature T c less than the second refrigeration startup point temperature T c 0ff at the second temperature T c greater than the second refrigeration startup point temperature T c 0n , and the first temperature T d is greater than or equal to the first refrigeration startup point temperature T d 0n , the compressor is started, the electric switching valve is switched to the first capillary, the first inlet air damper and the first return air damper are opened, the second inlet air damper is closed, and the refrigeration and freezing mode is started;

[0034] at the first temperature T d less than or equal to the first refrigeration startup point temperature T d 0ff , the compressor is turned off, the first inlet air damper and the first return air damper are turned off, and the refrigeration and freezing mode is turned off.

[0035] at the second temperature T c less than the second refrigeration startup point temperature T c 0n at the third temperature T z greater than a preset temperature, the refrigeration fan is turned off, the second inlet air damper is closed, and the refrigeration and humidification mode is turned off.

[0036] In some possible implementation manners, the preset temperature is greater than -5 ℃ and less than 1 ℃.

[0037] From the above, the application provides a refrigerator and a control method. The refrigerator comprises a cabinet, an air duct assembly, a refrigeration device, and a control device. The cabinet comprises a first chamber and a second chamber. The air duct assembly is located at a partition between the first chamber and the second chamber. 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 in the partition between the first chamber and the second chamber. 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. By arranging the evaporator between the two chambers, the evaporator does not occupy the volume of the refrigerator alone. The application further arranges the air duct, the air inlet damper, and the air return damper in the two chambers respectively, and cooperates the control system to control the compressor, the refrigeration fan, the switching valve control system flow, and the opening and closing of each damper, so as to realize independent and efficient refrigeration of the refrigeration chamber and the freezer chamber, achieve the double-system thermal cycle efficiency of a single evaporator, and reduce the refrigeration air duct device and the volume ratio of the refrigerator compared with the double-cycle air-cooled refrigerator. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0039] Figure 1 The structure schematic diagram of the refrigerator provided by the embodiment of the present application is shown in the figure.

[0040] Figure 2 The refrigeration system principle diagram of the refrigerator provided by the embodiment of the present application is shown in the figure.

[0041] Figure 3 The control method flow chart of the refrigerator provided by the embodiment of the present application is shown in the figure.

[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 air return; 6-Second air duct component; 61-Second air inlet; 62-Second air outlet; 63-Second air return; 7-Refrigeration fan; 8-First air inlet damper; 9-First air return damper; 10-Second air inlet damper. DETAILED DESCRIPTION

[0044] Embodiments will be described in detail below with reference to examples illustrated in the accompanying drawings. When the following description refers to the drawings, same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following embodiments are not meant to represent all implementations consistent with the present disclosure. Rather, they are merely examples of systems and methods consistent with some aspects of the present disclosure as detailed in the claims.

[0045] With the development of technology and the improvement of people's living standards, the refrigerator has become a necessity for every family. At present, the refrigerator is mostly air-cooled refrigerator, which is a refrigerator that uses a fan to circulate air to achieve cooling. In the air-cooled refrigerator, the cooler reduces the temperature inside the refrigerator by blowing cold air out of the fan. This cold air is evenly distributed to each part of the refrigerator, thereby achieving overall refrigeration.

[0046] The air-cooled refrigerator on the market is divided into two types: single system and multi-system air-cooled (the most common is double system) refrigerator. The single system air-cooled refrigerator has a freezing evaporator placed in the freezer compartment, and the refrigerant returns to the compressor through the compressor, condenser, capillary, freezing evaporator, forming a complete refrigeration cycle. Its advantages are that the refrigeration air duct volume is relatively small, the refrigerator can use a large space, and the cost is low; the disadvantage is that the refrigeration efficiency is relatively low, which is not good for energy saving, and the humidity in the refrigeration chamber is small, the relative humidity in the refrigeration chamber is only 15-40% during the empty running of the refrigeration chamber, which is not conducive to the preservation performance. The refrigeration chamber and the freezing chamber of the double system air-cooled refrigerator are variously configured with an evaporator, and the refrigeration evaporator and the freezing evaporator are switched to work by a switching valve. Its advantage is that the switching valve can be switched to the refrigeration evaporator and the freezing evaporator side, respectively, because of the large temperature difference between the refrigeration chamber and the freezing chamber, the double cycle can maintain the optimal thermodynamic cycle efficiency of the refrigeration system in the refrigeration chamber and the optimal thermodynamic cycle efficiency of the refrigeration system in the freezing chamber.

[0047] However, the current double system air-cooled refrigerator needs to set a refrigeration component in each chamber in order to achieve different refrigeration requirements of different chambers, and the refrigeration air duct component occupies a large volume, which reduces the effective space of the refrigerator and affects the user experience.

[0048] Based on this, the application provides a refrigerator and a control method. Through innovative design, the evaporator is arranged between two compartments, the air duct heat exchange assembly is innovatively designed and a plurality of air doors are arranged in the air duct heat exchange assembly, the heat exchanger cavity and the partition plate assembly are designed to be heat-insulated and sealed, an electric switching valve is arranged in the refrigeration system, and the switching of the plurality of air doors and the electric switching valve is controlled in combination with the refrigeration characteristics of the refrigerator at different refrigeration requirements. The cold energy of the evaporator is switched by the plurality of air doors and the fan variable speed, the electric valve and the compressor are controlled to control the refrigeration system flow, the working condition change of the refrigeration system is adapted, the thermodynamic cycle efficiency is improved under different refrigeration requirements, independent and efficient refrigeration of the refrigeration compartment and the freezing compartment is realized, the function of realizing double cycles by a single evaporator is achieved, and the energy saving and the moisture retention effect are better than those of the prior art single evaporator technology.

[0049] As shown in Figure 1 The refrigerator of the embodiment of the application is composed of a cabinet, an air duct assembly, a refrigeration device and a control device. In combination with the embodiment, the cabinet includes four heat-insulated compartments, i.e., a first compartment 1 and a second compartment 2. The air duct assembly of the embodiment of the application is arranged at a partition plate 4 between the first compartment 1 and the second compartment 2, and includes a refrigeration fan 7 and an evaporator 3. The partition plate 4 includes a first partition plate 41 and a second partition plate 42, and the air duct assembly includes a first air duct 5 and a second air duct 6. The first partition plate 41 and the first air duct 5 define a first compartment 1, a first air inlet 51, a first air outlet 52 and a first air return 53. The first air inlet 51, the first air outlet 52, the first compartment 1 and the first air return 53 are in communication. The second partition plate 42 and the second air duct 6 define a second compartment 2, a second air inlet 61, a second air outlet 62 and a second air return 63. The second air inlet 61, the second air outlet 62, the second compartment 2 and the second air return 63 are in communication.

[0050] The partition plate 4 and the evaporator 3 of the embodiment form an air flow heat exchange space around the evaporator 3, and the refrigeration fan 7 drives the evaporator to exchange heat and send cold energy to each compartment for cooling;

[0051] The air ducts 5 and 6 of the embodiment include a first air inlet 51 at the connection between the first compartment air duct 5 and the first partition plate 41, and a first air inlet door 8 is arranged at the first air inlet 51. A first air return door 9 is arranged on the other side of the first partition plate 41. A second air inlet 61 at the connection between the second air duct 6 and the second partition plate 42 is provided with a second air inlet door 10.

[0052] As shown in the accompanying Figure 2The refrigeration principle diagram of the embodiment, the refrigeration device is composed 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 comprises a first capillary tube and a second capillary tube.

[0053] 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 with 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 air return damper and the second air inlet damper.

[0054] The first sensor is arranged in the first chamber and used for detecting the temperature of the first chamber; the second sensor is arranged in the second chamber and used for detecting the temperature of the second chamber; the third sensor is arranged on the evaporator and used for detecting the temperature of the evaporator; the controller is arranged on the surface of the box body and electrically connected with 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 component and the second partition component have a heat insulation layer.

[0056] In some embodiments, the first partition component and the second partition component have a heat insulation layer.

[0057] In some embodiments, the first partition component is tightly matched with the lower part of the evaporator, the second partition component is tightly matched with the upper part of the evaporator, and the horizontal plane of the evaporator is kept at an inclined downward angle.

[0058] In some embodiments, the first partition component is tightly matched with the lower part of the evaporator, the second partition component is tightly matched with the upper part of the evaporator, and the horizontal plane of the evaporator is kept at an inclined downward angle.

[0059] In some embodiments, the first chamber temperature zone is a freezing temperature zone (-6 to -24℃), and the second chamber temperature zone is a refrigeration temperature zone (0 to 10℃); the second capillary tube has a higher flow rate than the first capillary tube; the first capillary tube has a flow rate of 3.1 to 3.7 L / min, and the second capillary tube has a flow rate of 4.1 to 5.2 L / min; the first capillary tube has a flow rate of 3.5 L / min, and the second capillary tube has a flow rate of 5.1 L / min.

[0060] The present application aims at the defects of the existing single-cycle and double-cycle air-cooled refrigerators. The evaporator is arranged between the freezing and refrigerating chambers through innovative design. The evaporator does not occupy the volume space of the refrigerator alone. With the advantage of the evaporator arranged between the two chambers, the two chambers are further provided with air ducts, air inlet and return air dampers, electric switching valves, and control systems. The compressor, the refrigeration fan speed, and the opening and closing of each air damper are controlled. The flow rate of the refrigeration system in different states is controlled through the switching valve. On the one hand, compared with the single-system air-cooled refrigerator, the refrigerating chamber and the freezing chamber realize independent and efficient refrigeration. Through flow control, higher thermal cycle efficiency and good energy-saving effect are realized. At the same time, the humidity of the refrigerating chamber is further increased, and the fruit and vegetable preservation effect is improved. On the other hand, compared with the existing double-cycle technology, the refrigeration air duct device is reduced, the refrigerator volume rate is large, and the cost performance is high.

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

[0062] The control method comprises:

[0063] obtaining a first temperature T d displayed by a first sensor, and a second temperature T c displayed by a second sensor;

[0064] when the second temperature T c is greater than a second refrigeration start point temperature T c 0n , and the first temperature T d is less than a first refrigeration start point temperature T d 0n , obtaining a third temperature T z displayed by a third sensor;

[0065] when the third temperature T z is less than or equal to a preset temperature, controlling a refrigeration fan to start and run at a first speed, a second air inlet damper to open, and a first air inlet damper and a first return air damper to remain closed, and starting a refrigerating humidification mode; otherwise, controlling a compressor to start, an electric switching valve to switch to a second capillary, a refrigeration fan to run at a second speed, a second air inlet damper to remain open, and a refrigerating refrigeration mode to start;

[0066] when the second temperature T c is less than or equal to a second refrigeration shutdown point temperature T c 0ff , a second air inlet damper is closed, a refrigerating refrigeration mode is closed, an electric switching valve is switched to a first capillary, and a freezing refrigeration mode is started, and a refrigeration fan runs at a second speed;

[0067] when the first temperature Td less than or equal to a first refrigeration shutdown point temperature T d 0ff when the second temperature T

[0068] when the second temperature T c less than a second refrigeration startup point temperature T c 0n and the third temperature T z greater than a preset temperature, the refrigeration fan is turned off, the second air inlet damper is turned off, and the refrigeration humidification mode is turned off.

[0069] In some embodiments, the method further comprises:

[0070] comparing the second temperature T c to a second refrigeration startup point temperature T c 0n and comparing the first temperature T d to a first refrigeration startup point temperature T d 0n ;

[0071] when the second temperature T c greater than a second refrigeration shutdown point temperature T c 0n and the first temperature T d greater than a first refrigeration startup point temperature T d 0n , the refrigeration humidification mode is started.

[0072] when the second temperature T c greater than a second refrigeration shutdown point temperature T c 0ff and the second temperature T c less than a second refrigeration startup point temperature T c 0n and the first temperature T d greater than a first refrigeration startup point temperature T d 0n , the refrigeration humidification mode is started.

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

[0074] when the second temperature T c greater than or equal to a second refrigeration startup point temperature T c 0n and the first temperature T d greater than or equal to a first refrigeration startup 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 temperature T? d 0n -3; If so, the electric switching valve switches to the first capillary tube, the first air inlet damper and the first return air damper open, and the refrigeration mode is started.

[0076] At the second temperature T c Less than or equal to the second refrigeration shutdown temperature T c 0ff At this time, the second air inlet damper closes, turning off the refrigeration mode;

[0077] At the first temperature T d Less than or equal to the first cooling shutdown temperature T d 0ff When the compressor is turned off, the first air inlet damper and the first air return damper are closed, and the refrigeration mode is turned off;

[0078] At the second temperature T c Less than the second refrigeration start-up temperature T c 0n And the third temperature T z When the temperature exceeds the preset temperature, the refrigeration fan will shut off, the second air inlet damper will close, and the refrigeration humidification mode will be turned off.

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

[0080] At the second temperature T c Greater than the second cooling shutdown temperature T c 0ff and the second temperature T c Less than the second refrigeration start-up temperature T c 0n And the first temperature T d Greater than or equal to the first refrigeration start-up temperature T d 0n When the compressor starts, the electric switching valve switches to the opening of the first capillary tube, the first air inlet damper and the first return air damper, and the closing of the second air inlet damper, thus starting the refrigeration mode;

[0081] At the first temperature T d Less than or equal to the first cooling shutdown temperature T d 0ff When the compressor is turned off, the first air inlet damper and the first air return damper are closed, and the refrigeration mode is turned off;

[0082] at the second temperature T c less than the second refrigeration start temperature T c 0n and the third temperature T z greater than a preset temperature, the refrigeration fan is turned off, the second air inlet damper is closed, and the refrigeration humidification mode is turned off.

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

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

[0085] Embodiments

[0086] S1: power-on collection of the refrigeration chamber temperature sensor Tc and the freezing chamber temperature sensor Td;

[0087] (1) when Tc≥Tcon and Td

[0088] (2) when Tc≥Tcon and Td≥Tdon, turn to S21.

[0089] (3) when Tcoff

[0090] S2: detection of the evaporator sensor Tz≤m, if yes, the refrigeration fan is started and runs at a low rotation speed, the second air supply damper is opened, the first air supply damper and the first air return damper remain closed, and the refrigeration chamber is humidified; if no, the compressor is started, the refrigeration fan is started, the second air inlet damper is opened, and the refrigeration chamber starts refrigeration, and turn to S3.

[0091] S21: the compressor, the switching valve is switched to the capillary tube 2, the refrigeration fan is started and runs at a high rotation speed, the second air inlet damper is opened, and the refrigeration chamber starts refrigeration, and turn to S21-1.

[0092] S21-1: detection of the evaporator sensor Tz≤Td on-3, if yes, the switching valve is switched to the capillary tube 1, the first air supply damper and the first air return damper are opened, and the freezing chamber starts refrigeration; if no, wait for refrigeration until the evaporator sensor Tz≤Td on-3, and if yes, start the freezing refrigeration.

[0093] S21-2: detection of Tc≤Tcoff, if yes, the second air inlet damper is closed, the refrigeration chamber stops refrigeration, and if no, return to S21.

[0094] S21-3: Td≤Tdo ff, if yes, turn to S4, and if no, return to S21-1.

[0095] S22: the compressor is started, the switching valve is switched to the capillary 1, the first inlet air damper and the first return air damper are opened, the second air damper is closed, and the refrigeration is performed in the freezing chamber;

[0096] S22-1: it is detected and determined that Td≤Td off, if yes, it is switched to S5, if no, it is switched to S22;

[0097] S3: it is detected and determined that Tc≤Tc off, if yes, it is switched to S4, if no, the refrigeration is kept in the refrigeration state until Tc≤Tc off is met, the second inlet air damper is closed, the refrigeration in the refrigeration chamber is stopped, the electric switching valve is switched to the capillary 1, and the refrigeration in the freezing chamber is started, and the fan keeps high speed operation;

[0098] S4: it is detected and determined that Td≤Td off, if yes, the compressor is closed, the first inlet air damper and the first return air damper are closed, and the refrigeration in the freezing chamber is stopped;

[0099] S5: it is determined that Tc<Tc on, if yes, it is determined that the evaporating sensor Tz≤m, if no, it is returned to S1;

[0100] S6: it is determined that the evaporating sensor Tz≤m, if yes, the refrigeration fan is started, it is switched to low speed operation, the second inlet air damper is opened, the first inlet air damper and the first return air damper are kept closed, and the refrigeration in the refrigeration chamber is humidified, if no, it is switched to S7;

[0101] S7: the refrigeration fan is closed, the second inlet air damper is closed, and the refrigeration in the refrigeration chamber is stopped.

[0102] The refrigerator and the control method described in the embodiment have -5℃≤m≤1℃, preferably, m in the embodiment is -2℃.

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

[0104] From the above embodiments, the refrigerator and the control method are provided, the refrigerator comprises a cabinet, an air duct assembly, a refrigeration device and a control device; the cabinet comprises a first chamber and a second chamber; the air duct assembly is located at a partition between the first chamber and the second chamber; the refrigeration device comprises a compressor, a condenser, an electric switch valve, a first capillary, a second capillary and an evaporator; the evaporator is located in the partition between the first chamber and the second chamber; 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. By arranging the evaporator between the two chambers, the evaporator does not occupy the volume space of the refrigerator alone. The application further arranges the air duct, the air inlet damper and the air return damper in the two chambers respectively, and cooperates the control system, controls the compressor, the refrigeration speed fan, the switch valve control system flow and the opening and closing of each damper, realizes the independent and efficient refrigeration of the refrigeration chamber and the freezer, realizes the double-system thermal cycle efficiency of the single evaporator, and compared with the double-cycle air-cooled refrigerator, the refrigeration air duct device is reduced, and the refrigerator volume rate is large.

[0105] The similar parts among the embodiments provided by the application can be referred to each other, the specific embodiments provided above are only several examples under the general concept of the application, and do not constitute the limitation of the protection scope of the application. For those skilled in the art, any other embodiments extended according to the application scheme without creative labor belong to the protection scope of the application.

Claims

1. A control method of a refrigerator, characterized by, The refrigerator comprises: a cabinet comprising a first chamber and a second chamber; an air duct assembly located at a partition between the first chamber and the second chamber; the air duct assembly comprises an air duct component, a partition component, and a refrigeration fan; the partition component comprises a first partition component and a second partition component, and the air duct component comprises 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 the 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; a control device comprising 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 with 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 air return damper, and the second air inlet damper. The control method of the refrigerator is: obtaining the first temperature T d displayed by the first sensor c ; When the first temperature T c is greater than the second refrigeration start-up point temperature T c 0n , and the first temperature T d is less than the first refrigeration start-up point temperature T d 0n , a third temperature T z displayed by a third sensor is acquired. at the third temperature T z If the temperature is less than or equal to the preset temperature, the refrigeration fan is controlled to start and run at a first rotating speed, the second air inlet damper is opened, the first air inlet damper and the first return air damper are kept closed, and the refrigeration humidification mode is opened; otherwise, the compressor is controlled to start, the electric switching valve is switched to the second capillary, the refrigeration fan runs at a second rotating speed, the second air inlet damper is kept open, and the refrigeration cooling mode is started. at the second temperature T c less than or equal to the second refrigeration shutdown point temperature T c 0ff the second inlet air damper is closed, the refrigeration mode is closed, the electric switching valve is switched to the first capillary, the freezing refrigeration mode is started, and the refrigeration fan operates at the second rotating speed. At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the compressor is turned off, the first inlet air damper and the first return air damper are turned off, and the freezing refrigeration mode is turned off. At the second temperature T c Less than the second refrigeration start point temperature T c 0n And the third temperature T z Greater than the preset temperature, the refrigeration fan is closed, the second air inlet damper is closed, and the refrigeration humidification mode is closed. acquiring a first temperature T displayed by a first sensor d and a second temperature T displayed by a second sensor c and further comprising: The second temperature T c is compared with the second refrigeration start point temperature T c 0n , and the first temperature T d is compared with the first refrigeration start point temperature T d 0n ; 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 , the refrigeration mode is started. 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 startup point temperature T c 0n , and the first temperature T d greater than the first refrigeration startup point temperature T d 0n , a freezing refrigeration mode is started. at the second temperature T c greater than or equal to the second refrigeration start point temperature T c 0n , and the first temperature T d greater than or equal to the first refrigeration start point temperature T d 0n , the compressor is started, the electric switch valve is switched to the second capillary, the refrigeration fan is started to run at the second rotating speed, the second air inlet damper is opened, and the refrigeration refrigeration mode is started. determining whether the third temperature T z is less than or equal to the first refrigeration start point temperature T d 0n ; if yes, the electric switching valve is switched to the first capillary, the first air inlet damper and the first return air damper are opened, and the freezing refrigeration mode is started. At the second temperature T c less than or equal to the second refrigeration shutdown point temperature T c 0ff the second inlet air damper is closed, and the refrigeration mode is closed. At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the compressor is turned off, the first inlet air damper and the first return air damper are turned off, and the freezing refrigeration mode is turned off. At the second temperature T c Less than the second refrigeration start point temperature T c 0n And the third temperature T z Greater than the preset temperature, the refrigeration fan is closed, the second air inlet damper is closed, and the refrigeration humidification mode is closed.

2. The control method according to claim 1, characterized by, 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 startup point temperature T c0n , and the first temperature T d greater than or equal to the first refrigeration startup point temperature T d 0n , the compressor is started, the electrically-operated switching valve is switched to the first capillary, the first inlet air damper and the first return air damper are opened, the second inlet air damper is closed, and the freezing refrigeration mode is started; At the first temperature T d Less than or equal to the first refrigeration shutdown point temperature T d 0ff When the compressor is turned off, the first inlet air damper and the first return air damper are turned off, and the freezing refrigeration mode is turned off. At the second temperature T c Less than the second refrigeration start point temperature T c 0n , and the third temperature T z Greater than the preset temperature, the refrigeration fan is closed, the second air inlet damper is closed, and the refrigeration humidification mode is closed.

3. The control method according to claim 1, characterized by, The preset temperature is greater than -5℃ and less than 1℃.

4. A refrigerator characterized by comprising: The refrigerator is configured with the control method of the refrigerator of claim 1, and the refrigerator comprises: a cabinet comprising a first chamber and a second chamber; an air duct assembly located at a partition between the first chamber and the second chamber; the air duct assembly comprises an air duct component, a partition component, and a refrigeration fan; the partition component comprises a first partition component and a second partition component, and the air duct component comprises 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 the 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; a control device comprising 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 with 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 air return damper, and the second air inlet damper.

5. The refrigerator according to claim 4, characterized in that, The first partition component and the first air duct component define a first chamber, a first air inlet, a first air outlet, and a first air return; the second partition component and the second air duct component define a second chamber, a second air inlet, a second air outlet, and a second air return; the first air inlet, the first air outlet, the first chamber, and the first air return are in communication; the second air inlet, the second air outlet, the second chamber, and the second air return are in communication.

6. The refrigerator according to claim 4, characterized in that, The first partition component and the second partition component have a heat insulation layer.

7. The refrigerator according to claim 4, characterized in that, The partition component is tightly fitted around the evaporator to form an air flow heat exchange space, so as to send cold energy to the first room and the second room when the refrigeration fan drives the evaporator to exchange heat.

8. The refrigerator according to claim 7, characterized in that, The first partition component is tightly fitted with the lower part of the evaporator, the second partition component is tightly fitted with the upper part of the evaporator, and the horizontal plane of the evaporator is kept at an angle downward.

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