Refrigerator

Abstract

The invention provides a refrigerator, and belongs to the technical field of refrigerators. The opening degree of the refrigerating return air inlet can be adjusted by adjusting the linear moving type adjusting mechanism, so that the air distribution proportion of the refrigerating chamber and the freezing chamber is adjusted, and the temperature of the refrigerating chamber and the freezing chamber can be adjusted. In consideration of the situation that the temperature of a freezing chamber or a refrigerating chamber is too high or too low possibly due to improper adjustment of a linear moving type adjusting mechanism by a user, the operation frequency of a compressor and the rotating speed of a fan in the next refrigerating cycle period are controlled according to the opening degree change of a refrigerating return air inlet; the temperatures of the refrigerating chamber and the freezing chamber can be respectively maintained in corresponding temperature ranges. Therefore, the linear moving type adjusting mechanism can be adjusted at any position, the temperature of the freezing chamber and the temperature of the refrigerating chamber can be maintained in a proper temperature range, and the situation that the temperature of the freezing chamber or the temperature of the refrigerating chamber deviates from the proper temperature range due to improper adjustment of the linear moving type adjusting mechanism can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerators, and mainly relates to a refrigerator. BACKGROUND

[0002] With the development of economy and the improvement of people's living standards, the refrigerator has become an essential household appliance in people's daily life. The refrigerator mainly reduces the temperature of food itself to delay the deterioration of food, thereby achieving the effect of long-term storage.

[0003] The refrigerator generally comprises a cabinet and a door body, wherein the cabinet is internally formed with an upper container cavity and a lower container cavity which are arranged in a spaced manner; the door body comprises an upper door body and a lower door body, the upper door body is used for opening and closing the upper container cavity, and the lower door body is used for opening and closing the lower container cavity.

[0004] The refrigerating chamber of the refrigerator is provided with a temperature adjusting structure (such as a dial switch or a rotary switch), and the user can adjust the temperature of the refrigerating chamber and the freezing chamber through the temperature adjusting structure. However, when the temperature of the refrigerating chamber and the freezing chamber is adjusted based on the temperature adjusting structure, the temperature of the refrigerating chamber is suitable but the temperature of the freezing chamber is too high or too low, or the temperature of the freezing chamber is suitable but the temperature of the refrigerating chamber is too high or too low. SUMMARY

[0005] The present application aims to provide a refrigerator, which aims to adjust the compressor frequency and the fan speed, so that the temperature adjusting structure (i.e. the linearly moving adjusting mechanism) is adjusted at any position, the temperature of the freezing chamber and the refrigerating chamber can be maintained within a suitable temperature range, and the temperature of the freezing chamber or the refrigerating chamber can be prevented from deviating from the suitable temperature range due to the adjustment of the linearly moving adjusting mechanism.

[0006] To achieve the above-mentioned purpose, the present application provides a refrigerator, which comprises:

[0007] a cabinet, the cabinet is internally formed with a refrigerating chamber and a freezing chamber which are arranged in a spaced manner;

[0008] an evaporator, the evaporator is arranged between the refrigerating chamber and the freezing chamber;

[0009] a compressor, the compressor is connected with the evaporator, and the compressor is configured to provide power for the refrigeration cycle of the refrigerating chamber and the freezing chamber;

[0010] a freezing air duct, the freezing air duct is arranged in the cabinet, the freezing air duct is communicated with the freezing chamber and forms a first air cooling circulation loop;

[0011] a refrigerating air duct, the refrigerating air duct is arranged in the cabinet, the refrigerating air duct is communicated with the refrigerating chamber and forms a second air cooling circulation loop;

[0012] An air supply air duct is arranged at the rear end of the evaporator, and the air outlet ends of the air supply air duct are communicated with the refrigeration air duct and the freezing air duct respectively;

[0013] An air fan is arranged near the air inlet end of the air supply air duct, and the air fan is capable of sucking the cold air generated by the evaporator into the air supply air duct;

[0014] A refrigeration air return port is arranged at the top of the front side of the refrigeration chamber, and a linearly moving adjustment mechanism is arranged at the refrigeration air return port, and the linearly moving adjustment mechanism is capable of adjusting the opening degree of the refrigeration air return port to adjust the air distribution ratio of the refrigeration chamber and the freezing chamber;

[0015] A controller is connected with the compressor and the air fan respectively, and the controller is configured to:

[0016] identify the change of the opening degree of the refrigeration air return port, and control the operating frequency of the compressor and the rotating speed of the air fan in the next refrigeration cycle according to the change of the opening degree of the refrigeration air return port, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in the corresponding temperature ranges respectively.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] In the embodiments of the present application, the refrigeration air return port is provided with a linearly moving adjustment mechanism, and the opening degree of the refrigeration air return port can be adjusted by adjusting the linearly moving adjustment mechanism to adjust the air distribution ratio of the refrigeration chamber and the freezing chamber, so that the temperatures of the refrigeration chamber and the freezing chamber can be adjusted. Considering that improper adjustment of the linearly moving adjustment mechanism may cause the temperature of the freezing chamber or the refrigeration chamber to be too high or too low, the present application controls the operating frequency of the compressor and the rotating speed of the air fan in the next refrigeration cycle according to the change of the opening degree of the refrigeration air return port, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in the corresponding temperature ranges respectively. Therefore, the linearly moving adjustment mechanism can be adjusted at any position, and the temperatures of the refrigeration chamber and the freezing chamber can be maintained in the appropriate temperature ranges, which can avoid the temperature of the freezing chamber or the refrigeration chamber deviating from the appropriate temperature range due to improper adjustment of the linearly moving adjustment mechanism.

[0019] In some embodiments of the present application, the identification of the change of the opening degree of the refrigeration air return port comprises:

[0020] detecting the length of the start-up of the compressor in a single refrigeration cycle;

[0021] if the length of the start-up of the compressor in the current refrigeration cycle is longer than that in the last refrigeration cycle, it is identified that the opening degree of the refrigeration air return port is adjusted to be smaller;

[0022] If the running time of the compressor in the current refrigeration cycle is reduced compared with the running time of the compressor in the last refrigeration cycle, it is identified that the opening degree of the refrigeration return air inlet is adjusted to be larger.

[0023] The above technical solution has the following advantages or beneficial effects:

[0024] In the embodiments of the present application, if the opening degree of the refrigeration return air inlet is adjusted to be smaller, the return air quantity of the refrigeration chamber will be reduced, the air cooling cycle of the refrigeration chamber is reduced, and the cooling rate of the refrigeration chamber is reduced. In order to achieve the set temperature of the refrigeration chamber, the running time of the compressor needs to be increased. If the opening degree of the refrigeration return air inlet is adjusted to be larger, the return air quantity of the refrigeration chamber will be increased, the air cooling cycle of the refrigeration chamber is increased, and the cooling rate of the refrigeration chamber is increased. In order to achieve the set temperature of the refrigeration chamber, the running time of the compressor will be shortened. According to this principle, conversely, if it is detected that the running time of the compressor in the current refrigeration cycle is increased compared with the running time of the compressor in the last refrigeration cycle, it can be determined that the opening degree of the refrigeration return air inlet is adjusted to be smaller. If the running time of the compressor in the current refrigeration cycle is reduced compared with the running time of the compressor in the last refrigeration cycle, it can be determined that the opening degree of the refrigeration return air inlet is adjusted to be larger. That is, the change of the opening degree of the refrigeration return air inlet can be identified by detecting the change of the running time of the compressor in a single refrigeration cycle.

[0025] In some embodiments of the present application, the refrigerator further comprises a refrigeration temperature sensor, which is arranged inside the refrigeration chamber and is used to collect the temperature of the refrigeration chamber. Correspondingly, the identification of the change of the opening degree of the refrigeration return air inlet comprises:

[0026] According to the temperature of the refrigeration chamber collected by the refrigeration temperature sensor, the cooling rate of the refrigeration chamber in a single refrigeration cycle is calculated.

[0027] If the cooling rate of the refrigeration chamber in the current refrigeration cycle is reduced compared with the cooling rate of the refrigeration chamber in the last refrigeration cycle, it is identified that the opening degree of the refrigeration return air inlet is adjusted to be smaller.

[0028] If the cooling rate of the refrigeration chamber in the current refrigeration cycle is increased compared with the cooling rate of the refrigeration chamber in the last refrigeration cycle, it is identified that the opening degree of the refrigeration return air inlet is adjusted to be larger.

[0029] The above technical solution has the following advantages or beneficial effects:

[0030] In the embodiments of the present application, if the opening degree of the refrigeration return air inlet is adjusted to be smaller, the return air volume of the refrigeration chamber will decrease, the air cooling cycle of the refrigeration chamber will decrease, and the cooling rate of the refrigeration chamber will decrease. If the opening degree of the refrigeration return air inlet is adjusted to be larger, the return air volume of the refrigeration chamber will increase, the air cooling cycle of the refrigeration chamber will increase, and the cooling rate of the refrigeration chamber will increase. According to this principle, conversely, if it is detected that the cooling rate of the refrigeration chamber in the current refrigeration cycle period is lower than the cooling rate of the refrigeration chamber in the last refrigeration cycle period, it can be determined that the opening degree of the refrigeration return air inlet is adjusted to be smaller. If the cooling rate of the refrigeration chamber in the current refrigeration cycle period is higher than the cooling rate of the refrigeration chamber in the last refrigeration cycle period, it can be determined that the opening degree of the refrigeration return air inlet is adjusted to be larger. That is, the change of the opening degree of the refrigeration return air inlet can be identified by detecting the change of the cooling rate of the refrigeration chamber in a single refrigeration cycle period.

[0031] In some embodiments of the present application, the running frequency of the compressor and the rotating speed of the fan in the next refrigeration cycle period are controlled according to the change of the opening degree of the refrigeration return air inlet, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in corresponding temperature ranges, including:

[0032] If it is identified that the opening degree of the refrigeration return air inlet is adjusted to be smaller, the running frequency of the compressor in the next refrigeration cycle period is controlled to be smaller, and the rotating speed of the fan is controlled to be larger, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in corresponding temperature ranges.

[0033] If it is identified that the opening degree of the refrigeration return air inlet is adjusted to be larger, the running frequency of the compressor in the next refrigeration cycle period is controlled to be larger, and the rotating speed of the fan is controlled to be smaller, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in corresponding temperature ranges.

[0034] The above technical solutions have the following advantages or beneficial effects:

[0035] In the embodiments of the present application, if the opening degree of the refrigeration return air inlet is adjusted to be small, the refrigeration return air volume of the refrigeration chamber will decrease, the air cooling cycle of the refrigeration chamber will decrease, and the air cooling cycle of the freezing chamber will increase, which will cause the refrigeration chamber temperature to decrease and the freezing chamber temperature to increase, so that the freezing chamber temperature may be too low (waste of energy consumption). Since the freezing chamber has a large load, it is more affected by the compressor frequency (i.e. the refrigerating capacity) than the refrigeration chamber, so the operating frequency of the compressor in the next refrigeration cycle can be controlled to decrease, so that the cooling rate of the freezing chamber can be reduced, and the freezing chamber temperature can be ensured not to be too low. At the same time, since the cooling rate of the refrigeration chamber decreases, the rotating speed of the fan in the next refrigeration cycle can be controlled to increase, so that the air cooling cycle of the refrigeration chamber can be accelerated (i.e. the cooling rate of the refrigeration chamber can be increased), and thus the change of the cooling rate of the refrigeration chamber will not be too large. That is, by controlling the operating frequency of the compressor in the next refrigeration cycle to decrease and the rotating speed of the fan to increase, the cooling rate of the freezing chamber can be reduced, and the freezing chamber temperature can be prevented from being too low, and the change of the cooling rate of the refrigeration chamber can be ensured not to be too large. Similarly, if the opening degree of the refrigeration return air inlet is adjusted to be large, the refrigeration return air volume of the refrigeration chamber will increase, the air cooling cycle of the refrigeration chamber will increase, and the air cooling cycle of the freezing chamber will decrease, which will cause the refrigeration chamber temperature to increase and the freezing chamber temperature to decrease, so that the freezing chamber temperature may be too high (affecting food preservation). Since the freezing chamber has a large load, it is more affected by the compressor frequency (i.e. the refrigerating capacity) than the refrigeration chamber, so the operating frequency of the compressor in the next refrigeration cycle can be controlled to increase, so that the cooling rate of the freezing chamber can be increased, and the freezing chamber temperature can be ensured not to be too high. At the same time, since the cooling rate of the refrigeration chamber increases, the rotating speed of the fan in the next refrigeration cycle can be controlled to decrease, so that the air cooling cycle of the refrigeration chamber can be slowed down (i.e. the cooling rate of the refrigeration chamber can be reduced), and thus the change of the cooling rate of the refrigeration chamber will not be too large. That is, by controlling the operating frequency of the compressor in the next refrigeration cycle to increase and the rotating speed of the fan to decrease, the cooling rate of the freezing chamber can be increased, and the freezing chamber temperature can be prevented from being too high, and the change of the cooling rate of the refrigeration chamber can be ensured not to be too large.

[0036] In some embodiments of the present application, the freezing air duct is close to the back side of the freezing chamber, at least one freezing air inlet is arranged on the back side of the freezing chamber, and the bottom of the front side of the freezing chamber is provided with a freezing return air inlet.

[0037] The refrigeration air duct is close to the back side of the refrigeration chamber, and at least one refrigeration air inlet is arranged on the back side of the refrigeration chamber, and the refrigeration air inlet is in communication with the refrigeration air duct.

[0038] The above technical solutions have the following advantages or beneficial effects:

[0039] In the embodiments of the present application, the freezing air inlet is arranged at the back side of the freezing chamber, and the freezing air return is arranged at the bottom of the front side of the freezing chamber, so that the evaporator cold air can be directly introduced through the freezing air inlet at the back side, and the freezing air return at the bottom of the front side of the freezing chamber can complete efficient circulation by using the cold air sinking characteristics. Through the convection layout of the back side air inlet and the front side bottom air return, the cold energy utilization rate can be improved, thereby improving the heat exchange efficiency of the freezing chamber. The refrigeration air inlet is arranged at the back side of the refrigeration chamber, and the refrigeration air return is arranged at the top of the front side of the refrigeration chamber, so that the evaporator cold air can be directly introduced through the refrigeration air inlet at the back side, and the refrigeration air return at the top of the front side can form efficient circulation by using the principle of natural rising of hot air. Through the convection layout of the back side air inlet and the front side top air return, the cold energy utilization rate can be improved, thereby improving the heat exchange efficiency of the refrigeration chamber.

[0040] In some embodiments of the present application, the freezing chamber is located above the refrigeration chamber, and the evaporator is arranged obliquely at the bottom of the freezing chamber.

[0041] The above technical solution has the following advantages or beneficial effects:

[0042] In the embodiments of the present application, considering that the evaporator will generate heat (hot air) during defrosting, the hot air (with reduced density) will flow upwards, thereby affecting the temperature of the upper container cavity and causing temperature fluctuations in the upper container cavity. If the upper container cavity is a refrigeration chamber, since the temperature of the refrigeration chamber itself is relatively high (compared to the temperature of the freezing chamber), it is easy to cause the temperature of the refrigeration chamber to be too high, affecting the preservation of food materials in the refrigeration chamber. By arranging the freezing chamber above the refrigeration chamber, i.e., the upper container cavity is a freezing chamber, since the temperature of the freezing chamber itself is very low, even if the heat generated during evaporator defrosting causes temperature fluctuations, the temperature fluctuations will not basically affect the low-temperature state of the freezing chamber (even if the temperature rises slightly, the freezing chamber can still maintain a low-temperature state), i.e., it will not affect the preservation of food materials in the freezing chamber. After the evaporator is defrosted, the frost layer will melt into water, and the evaporator is arranged obliquely at the bottom of the freezing chamber, i.e., the mounting plane of the evaporator body forms an angle with the horizontal plane, thereby facilitating the discharge of defrosting water.

[0043] In some embodiments of the present application, the inclination angle of the oblique arrangement of the evaporator ranges from 5 to 8 degrees.

[0044] The above technical solution has the following advantages or beneficial effects:

[0045] In the embodiments of the present application, the inclination angle of 5 to 8 degrees is the optimal inclination angle range, i.e., the inclination angle is greater than or equal to 5 degrees, which can basically discharge the defrosting water, and when the inclination angle reaches 8 degrees, the defrosting water is close to zero residue. By arranging the inclination angle in the range of 5 to 8 degrees, the effective discharge of defrosting water can be ensured.

[0046] In some embodiments of the present application, the evaporator is provided with heating pipes, and the heating pipes are arranged from dense to sparse at the front, middle and rear of the evaporator.

[0047] The above technical solution has the following advantages or beneficial effects:

[0048] In the embodiments of the present application, considering the double-air-duct independent circulation air path design of the embodiments of the present application, the refrigeration return air inlet is arranged at the bottom of the front side of the refrigeration chamber, that is, the cold air passing through the refrigeration chamber returns to the front end of the evaporator through the refrigeration return air inlet at the bottom of the front side of the refrigeration chamber. The refrigeration return air inlet is arranged at the top of the front side of the refrigeration chamber, that is, the cold air passing through the refrigeration chamber returns to the front end of the evaporator through the refrigeration return air inlet at the top of the front side of the refrigeration chamber. That is, the return air is at the front end of the evaporator, which causes more serious frosting at the front end of the evaporator. To this end, the heating pipes are arranged from dense to sparse at the front, middle and rear of the evaporator, which can improve the defrosting uniformity, improve the defrosting efficiency, and shorten the defrosting time.

[0049] In some embodiments of the present application, the evaporator is provided with a clamping groove, and the heating pipes are installed on the evaporator through the clamping groove to form an integrated assembly with the evaporator.

[0050] The above technical solution has the following advantages or beneficial effects:

[0051] In the embodiments of the present application, the heating pipes are directly installed on the evaporator through the clamping groove, which can realize molecular-level contact between the heating pipes and the fins of the evaporator, improve the defrosting efficiency, and save defrosting energy consumption. The integrated assembly of the heating pipes and the evaporator can improve the space utilization.

[0052] In some embodiments of the present application, the heating pipes are aluminum pipe heating pipes.

[0053] The above technical solution has the following advantages or beneficial effects:

[0054] In the embodiments of the present application, the unit mass thermal conductivity of the aluminum pipe is high, and the heating pipes are aluminum pipe heating pipes. Compared with the existing defrosting scheme using heat radiation, the direct contact defrosting using aluminum pipe heating pipes can improve the defrosting uniformity and improve the defrosting efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 FIG. 1 is a front view of a refrigerator according to an embodiment of the present application.

[0056] Figure 2 FIG. 2 is a sectional view of the refrigerator of FIG. 1. Figure 1

[0057] Figure 3 FIG. 3 is a side sectional structure schematic view of the refrigerator according to an embodiment of the present application.

[0058] Figure 4 ​is a schematic diagram of air duct circulation of a refrigerator provided by an embodiment of the present application.

[0059] Figure 5 is a schematic diagram of a linearly moving adjustment mechanism provided by an embodiment of the present application.

[0060] Figure 6 is a schematic diagram of an evaporator provided by an embodiment of the present application.

[0061] Figure 7 is a schematic diagram of an installation structure of an evaporator provided by an embodiment of the present application.

[0062] Figure 8 is a schematic diagram of a refrigerator structure provided by an embodiment of the present application, which comprises a drainage structure.

[0063] Figure 9 is a flow chart of a refrigerator control method provided by an embodiment of the present application.

[0064] Figure 10 is a step flow chart of identifying a change in an opening degree of a refrigeration return air inlet provided by an embodiment of the present application.

[0065] Figure 11 is another step flow chart of identifying a change in an opening degree of a refrigeration return air inlet provided by an embodiment of the present application.

[0066] In the above description, the correspondence between the reference signs and the component names is as follows:

[0067] 1, cabinet, 11, refrigeration chamber, 12, freezing chamber, 13, cabinet door, 14, evaporator accommodating cavity, 15, evaporator, 16, freezing air duct, 17, refrigeration air duct, 18, air supply air duct, 20, linearly moving adjustment mechanism, 21, heating pipe;

[0068] 111, refrigeration air inlet, 112, refrigeration return air inlet, 121, freezing air inlet, 122, freezing return air inlet, 101, drainage port, 102, drainage pipe. DETAILED DESCRIPTION

[0069] The present application provides a refrigerator. To make the purpose, technical solutions and effects of the present application clearer and more explicit, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0070] In the description of the present application, it needs to be understood that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0071] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be direct connection, or indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0072] The refrigeration chamber of the refrigerator is provided with a temperature adjusting structure (such as a dial switch or a rotary switch), and the user can adjust the temperature of the refrigeration chamber and the freezing chamber through the temperature adjusting structure. However, when the temperature of the refrigeration chamber and the freezing chamber is adjusted based on the temperature adjusting structure at present, the temperature of the refrigeration chamber is suitable but the temperature of the freezing chamber is too high or too low, or the temperature of the freezing chamber is suitable but the temperature of the refrigeration chamber is too high or too low

[0073] Based on this, the present application provides a refrigerator, by adjusting the frequency of the compressor and the rotating speed of the fan, the temperature adjusting structure (i.e. linearly moving type adjusting mechanism) is adjusted at any position, the temperature of the freezing chamber and the refrigeration chamber can be maintained in a suitable temperature range, which can avoid the temperature of the freezing chamber or the refrigeration chamber deviating from the suitable temperature range due to the adjustment of the linearly moving type adjusting mechanism.

[0074] Please refer to Figures 1 to 2 shown, Figure 1 It is a front view of the refrigerator of an embodiment of the present application. Figure 2 It is Figure 1 A cross-sectional view of the refrigerator. The refrigerator provided by the present application can include a cabinet 1. The cabinet 1 can adopt a hollow structure such as a cuboid. The cabinet 1 forms the outer shell of the refrigerator. It needs to be noted that the cabinet 1 can also adopt a hollow shell structure of other shapes.

[0075] In some embodiments, the inside of the cabinet 1 can be provided with several compartments, and the compartments can include a refrigeration chamber 11 and a freezing chamber 12. The refrigeration chamber 11 and the freezing chamber 12 can be provided as a plurality of storage chambers. The cabinet 1 can form an upper cavity and a lower cavity arranged in an upper and lower interval. The upper cavity can be the refrigeration chamber 11 or the freezing chamber 12, and the lower cavity can be the refrigeration chamber 11 or the freezing chamber 12.

[0076] In some embodiments, the refrigerating compartment 11 and the freezing compartment 12 can be independent storage spaces to meet different refrigeration requirements such as freezing, refrigerating, and the like according to different food categories, and to store items that need refrigeration or freezing. The refrigerating compartment 11 and the freezing compartment 12 can be arranged in an up-down split manner.

[0077] In some embodiments, the refrigerator can include a cabinet. The refrigerating compartment 11 and the freezing compartment 12 can be formed in the cabinet.

[0078] Referring to Figure 1 In some embodiments, the refrigerator can include a cabinet door 13. The cabinet door 13 can be hinged to the front side of the cabinet 1 to open and close the refrigerating compartment 11 and the freezing compartment 12.

[0079] It should be noted that the cabinet door 13 can be provided in multiple numbers. The cabinet door 13 can be provided in one-to-one correspondence with the refrigerating compartment 11 and the freezing compartment 12, one refrigerating compartment 11 can be provided with one or more cabinet doors 13, and one freezing compartment can also be provided with one or more cabinet doors 13.

[0080] In some embodiments, the cabinet 1 can be provided with a compressor chamber inside. The compressor chamber can be provided with a compressor. The compressor chamber can be provided at the bottom region in the cabinet 1. The compressor chamber can be located below the rear side of the freezing compartment 12. The compressor, the condenser, the throttling device, and the like can be provided in the cabinet 1.

[0081] In some embodiments, the refrigerator can include a refrigeration system. The refrigeration system can be provided inside the cabinet 1. The refrigeration system can be used to provide cold air inside the refrigerator to maintain a low-temperature environment in each of the refrigerating compartment 11 and the freezing compartment 12. The refrigeration system is a system that uses refrigerant circulation to reduce temperature, and mainly includes a compressor, a condenser, a throttling element, an evaporator, and the like. The refrigeration system circulates the refrigerant to transfer heat from a low-temperature object to a high-temperature object, thereby achieving a refrigeration effect.

[0082] In some embodiments, the refrigeration system can include a compressor (not shown in the figure). The compressor can serve as a power source for the refrigeration cycle of the refrigerating compartment 11 and the freezing compartment 12, and can suck in low-temperature and low-pressure refrigerant gas and compress it into high-temperature and high-pressure gas. The compressor can deliver the high-temperature and high-pressure refrigerant to the condenser.

[0083] In some embodiments, the refrigeration system can include a condenser (not shown in the figure). The condenser can be used to receive the refrigerant flowing out of the compressor, and can cool and convert the high-temperature and high-pressure refrigerant gas from the compressor into a liquid state. The condenser can transfer heat from the refrigerant to the surrounding air to reduce the temperature of the refrigerant.

[0084] In some embodiments, the refrigeration system can comprise a throttling device (not shown in the figure). The condenser can deliver the condensed refrigerant into the throttling device. The throttling device can adopt a capillary tube. The throttling device can be used to throttle and depressurize the refrigerant.

[0085] In some embodiments, the refrigeration system can comprise an evaporator. The throttling device can deliver the throttled and depressurized refrigerant into the evaporator. The evaporator can be used to evaporate and boil the refrigerant vapor to be able to absorb the heat of the surrounding medium.

[0086] In some embodiments, the compressor, the condenser, the throttling device, and the evaporator can be sequentially connected to form a refrigeration circuit. The refrigerant can circulate in the refrigeration circuit to achieve refrigeration of the refrigeration compartment 11 and the freezer compartment 12 inside the cabinet 1.

[0087] Referring to Figure 3 , Figure 3 is a schematic view of a side cross-section structure of a refrigerator provided in an embodiment of the present application. As shown in Figure 3 , the refrigerator can comprise an evaporator 15, which is arranged between the refrigeration compartment 11 and the freezer compartment 12, i.e., an evaporator accommodating cavity 14 is arranged at an intermediate position between the refrigeration compartment 11 and the freezer compartment 12, and the evaporator 15 is arranged in the evaporator accommodating cavity 14.

[0088] Referring to Figure 4 , Figure 4 is a schematic view of an air duct circulation of a refrigerator provided in an embodiment of the present application. The refrigerator can comprise a freezer air duct 16 arranged in the cabinet 1. The freezer air duct 16 can be located at the back side of the freezer compartment 12. The freezer air duct 16 is located at the back side of the inner container of the freezer compartment 12. The freezer air duct 16 communicates with the freezer compartment 12 and forms a first air cooling circulation loop. The first air cooling circulation loop is a cold air flow route for refrigerating the freezer compartment 12, and the cold air in the freezer air duct 16 will circulate in the freezer air duct 16 and the freezer compartment 12 to refrigerate the freezer compartment 12.

[0089] Referring to Figure 4 , the refrigerator can comprise a refrigeration air duct 17 arranged in the cabinet 1. The refrigeration air duct 17 can be located at the back side of the refrigeration compartment 11. The refrigeration air duct 17 is located at the back side of the inner container of the refrigeration compartment 11. The refrigeration air duct 17 communicates with the refrigeration compartment 11 and forms a second air cooling circulation loop. The second air cooling circulation loop is a cold air flow route for refrigerating the refrigeration compartment 11, and the cold air in the refrigeration air duct 17 will circulate in the refrigeration air duct 17 and the refrigeration compartment 11 to refrigerate the refrigeration compartment 11.

[0090] Referring to Figure 4The refrigerator can include a supply air duct 18 arranged at the rear end of the evaporator 15, and the air outlet end of the supply air duct 18 is communicated with the refrigeration air duct 17 and the freezing air duct 16 respectively. The supply air duct 18 can be communicated with the evaporator accommodating cavity 14, and the supply air duct 18 is arranged close to the back of the evaporator accommodating cavity 14. After the cold air flows into the supply air duct 18, the cold air can be divided into two paths, one path flows to the freezing air duct 16 and then enters the freezing chamber 12 through the freezing air duct 16, and the other path flows to the refrigeration air duct 17 and then enters the refrigeration chamber through the refrigeration air duct 17.

[0091] In some embodiments, the air inlet of the supply air duct 18 can be provided with an air door capable of closing or conducting the supply air duct 18. Since the air door is arranged at the air inlet of the supply air duct 18, when the refrigerator is refrigerated, the air door can be controlled to be opened, so that the refrigeration and freezing air cooling circulation loop is conducted to refrigerate the refrigeration chamber and the freezing chamber. When the refrigerator is defrosted, the air door can be controlled to be closed, so that the hot air generated in the defrosting process can be prevented from being transmitted to the refrigeration chamber and the freezing chamber through the air duct.

[0092] The refrigerator can include a fan (not shown in the figure) arranged close to the air inlet end of the supply air duct 18. The fan can be arranged in the evaporator accommodating cavity 14, and the fan is arranged at the back side of the evaporator 15. The fan is located between the air inlet end of the supply air duct 18 and the evaporator 15, so as to suck the cold energy generated by the evaporator 15 into the supply air duct 18, and then flow to the freezing air duct 16 and the refrigeration air duct 17 respectively.

[0093] In some embodiments, the fan can include a fan motor and a fan blade, and the fan motor drives the fan blade to rotate to generate air flow to bring the cold energy of the evaporator to the supply air duct. The fan can be a centrifugal fan or a cross-flow fan. In order to achieve the effect of improving the volume, the fan can use an ultra-thin centrifugal fan.

[0094] In the embodiments of the present application, only one fan needs to be arranged in the evaporator accommodating cavity 14, so as to realize the distribution of cold energy to the freezing chamber 12 and the refrigeration chamber 11 at the same time. Compared with the scheme of arranging one fan at the air inlet of the refrigeration chamber 11 and the air inlet of the freezing chamber respectively, the number of fans to be installed can be reduced, and the cost can be reduced.

[0095] In the embodiment of the present application, the evaporator 15 is arranged between the refrigeration chamber 11 and the freezing chamber 12, and is in communication with the refrigeration air duct 17 and the freezing air duct 16 through the air outlet end of the air supply duct 18, the freezing air duct 16 is in communication with the freezing chamber 12 and forms a first air cooling circulation loop, and the refrigeration air duct 17 is in communication with the refrigeration chamber 11 and forms a second air cooling circulation loop, so that the cold air generated by the evaporator 15 is divided into two paths after being sucked into the air supply duct 18 by the fan, one path is transported to the freezing chamber 12 through the freezing air duct 16, and the other path is transported to the refrigeration chamber 11 through the refrigeration air duct 17, thereby forming a double-air-duct independent circulation system for refrigeration and freezing. Compared with the existing single-circulation air path for freezing and refrigeration, the return air path of the lower container cavity can be effectively shortened, the air resistance of the lower container cavity can be reduced, and the air supply efficiency of the lower container cavity can be improved.

[0096] With reference to the foregoing Figure 4 , the freezing air duct 16 is close to the back side of the freezing chamber 12, and the freezing air duct 16 can be located at the back side of the inner container of the freezing chamber 12. At least one freezing air inlet 121 is arranged on the back side of the freezing chamber 12. If the freezing chamber is divided into a plurality of freezing compartments, each freezing compartment can correspond to one freezing air inlet 121. The bottom of the front side of the freezing chamber 12 is provided with a freezing air return port 122, and the cold air flowing out of the freezing air return port 122 can enter the evaporator accommodating cavity 14, that is, the cold air flowing out of the freezing air return port 122 returns to the front end of the evaporator 15 in the evaporator accommodating cavity 14. Each freezing air inlet 121 is in communication with the freezing air duct 16, so that the cold air flowing into the freezing air duct 16 can flow into the freezing chamber 12 through each freezing air inlet 121, and after heat exchange with the medium in the freezing chamber 12, the cold air flows out of the freezing air return port 122 at the bottom of the front side of the freezing chamber 12 to the front end of the evaporator 15.

[0097] Specifically, the fan rotates to suck the cold air generated by the evaporator 15 into the air supply duct 18, and then the cold air flows into the freezing air duct 16. The cold air in the freezing air duct 16 flows into the freezing chamber 12 through the freezing air inlet 121. When the cold air flows through the freezing chamber 12, it will perform cold transfer with the air in the freezing chamber 12. After the cold transfer is completed, the original air temperature in the freezing chamber 12 is reduced. Finally, part of the air in the freezing chamber 12 will flow back to the front end of the evaporator 15 through the freezing air return port 122 to continue to absorb the cold quantity emitted from the evaporator 15. After absorbing the cold quantity, new cold air is formed and is sucked into the air supply duct 18 by the fan, thereby completing one air cooling circulation.

[0098] The refrigeration air inlet 121 is arranged at the back side of the refrigeration chamber 12, and the refrigeration air return 122 is arranged at the bottom of the front side of the refrigeration chamber 12, so that the cold air generated by the evaporator 15 can be directly introduced through the refrigeration air inlet 121 at the back side, and the cold air exchanges heat with the medium in the refrigeration chamber 12, and then flows back to the front end of the evaporator 15 through the refrigeration air return 122 at the bottom of the front side of the refrigeration chamber 12, forming a first air cooling circulation loop. By arranging the refrigeration air return 122 at the bottom of the front side of the refrigeration chamber 12, the cold air sinking characteristics can be used to complete efficient air circulation, and the cold energy utilization rate can be improved, thereby improving the heat exchange efficiency of the refrigeration chamber.

[0099] With reference to the above Figure 4 , the refrigeration air duct 17 is arranged close to the back side of the refrigeration chamber 11. The refrigeration air duct 17 can be arranged at the back side of the refrigeration chamber 11, and the refrigeration air duct 17 is arranged at the back side of the inner container of the refrigeration chamber 11. At least one refrigeration air inlet 111 is arranged at the back side of the refrigeration chamber 11, and if the refrigeration chamber is divided into multiple refrigeration compartments, each refrigeration compartment can correspond to one refrigeration air inlet 111. The refrigeration air return 112 is arranged at the top of the front side of the refrigeration chamber, that is, the cold air can flow out of the refrigeration air return 112 and back to the front end of the evaporator 15 in the evaporator accommodating cavity 14. Each refrigeration air inlet 111 is in communication with the refrigeration air duct 17, so that the cold air flowing into the refrigeration air duct 17 can flow into the refrigeration chamber 11 through each refrigeration air inlet 111, and after heat exchange with the medium in the refrigeration chamber 11, the cold air flows out of the refrigeration air return 112 at the top of the front side of the refrigeration chamber 11 and flows into the front end of the evaporator 15.

[0100] Specifically, the fan rotates to suck the cold air generated by the evaporator 15 into the air supply duct 18, and then the cold air flows into the refrigeration air duct 17. The cold air in the refrigeration air duct 17 flows into the refrigeration chamber 11 through the refrigeration air inlet 111. When the cold air flows through the refrigeration chamber 11, it will perform cold transfer with the air in the refrigeration chamber 11. After the cold transfer is completed, the original air temperature in the refrigeration chamber 11 is reduced. Finally, part of the air in the refrigeration chamber 11 will flow back to the front end of the evaporator 15 through the refrigeration air return 112 to continue to absorb the cold energy emitted from the evaporator 15. After absorbing the cold energy, new cold air is formed and is sucked into the air supply duct 18 by the fan, thereby completing an air cooling circulation.

[0101] The refrigeration air inlet 111 is arranged at the back side of the refrigeration chamber 11, and the refrigeration air return 112 is arranged at the top of the front side of the refrigeration chamber 11, so that the cold air generated by the evaporator 15 can be directly introduced through the refrigeration air inlet 111 at the back side, and the cold air is heated with the medium in the refrigeration chamber 11, and then flows back to the front end of the evaporator 15 through the refrigeration air return 112 at the top of the front side of the refrigeration chamber 11, to form a second air cooling circulation loop. The refrigeration air return 112 is arranged at the top of the front side of the refrigeration chamber 11, so that the principle of natural rising of hot air can be used to form an efficient air circulation. The convection layout of the back side air inlet and the front side top air return can improve the cold energy utilization rate, thereby improving the heat exchange efficiency of the refrigeration chamber.

[0102] Referring to Figure 5 , Figure 5 is a structural schematic diagram of a linear moving adjustment mechanism provided in an embodiment of the present application. In some embodiments, the refrigeration air return 112 is provided with a linear moving adjustment mechanism 20, which can adjust the opening degree of the refrigeration air return 112 to adjust the air return amount of the refrigeration chamber 11, so that the air distribution ratio of the refrigeration chamber 11 and the freezing chamber 12 (or the refrigeration air duct 16 and the freezing air duct) can be adjusted. For example, by adjusting the linear moving adjustment mechanism 20 to increase the opening degree of the refrigeration air return 112, the air return amount of the refrigeration chamber can be increased, so that the air distribution ratio of the refrigeration chamber can be increased. Different air distribution ratios correspond to different cold air circulation rates of the refrigeration chamber 11 and the freezing chamber 12, so that the cooling rates of the refrigeration chamber 11 and the freezing chamber 12 are different.

[0103] For example, the initial air distribution ratio is 50% for the freezing chamber and 50% for the refrigeration chamber, and by adjusting the linear moving adjustment mechanism 20 to increase the opening degree of the refrigeration air return 112, the air distribution ratio can be adjusted to 70% for the refrigeration chamber and 30% for the freezing chamber. Or by adjusting the linear moving adjustment mechanism 20 to decrease the opening degree of the refrigeration air return 112, the air distribution ratio can be adjusted to 20% for the refrigeration chamber and 80% for the freezing chamber.

[0104] The linear moving adjustment mechanism 20 can be adjusted according to the refrigeration demand. For example, if the refrigeration chamber 11 needs to be rapidly cooled, the air return amount of the refrigeration chamber 11 can be increased by adjusting the linear moving adjustment mechanism 20, so that the cold energy circulation of the refrigeration chamber 11 is accelerated, thereby increasing the refrigeration rate of the refrigeration chamber 11. If the freezing chamber 12 needs to be rapidly cooled, the air return amount of the refrigeration chamber 11 can be decreased by adjusting the linear moving adjustment mechanism 20, so that the air distribution ratio of the freezing chamber is increased, the cold energy circulation of the freezing chamber 12 is accelerated, and the refrigeration rate of the freezing chamber 12 is increased.

[0105] In some embodiments, the linearly moving adjustment mechanism 20 can be an adjustment slider or an adjustment tab, and the opening degree of the refrigeration return air outlet 112 can be adjusted by moving the slider or the tab horizontally or vertically.

[0106] Specifically, when the ambient temperature is high or the user needs to quickly cool the refrigeration compartment 11 due to a large amount of food placed in the refrigeration compartment 11, the opening degree of the refrigeration return air outlet 112 can be adjusted by the linearly moving adjustment mechanism 20 to increase the cooling speed of the refrigeration compartment 11. When the ambient temperature is low, the opening degree of the refrigeration return air outlet 112 can be adjusted by the linearly moving adjustment mechanism 20 to decrease the cooling speed of the refrigeration compartment 11. Similarly, when the user wants to quickly cool the freezer compartment 12, the opening degree of the refrigeration return air outlet 112 can be adjusted by the linearly moving adjustment mechanism 20 to increase the cooling speed of the freezer compartment 12.

[0107] In the embodiments of the present application, the opening degree of the refrigeration return air outlet 112 is adjusted by the linearly moving adjustment mechanism 20 to adjust the return air volume of the refrigeration compartment 11, and thus the air distribution ratio between the refrigeration compartment 11 and the freezer compartment 12 can be adjusted. In this way, the temperatures of the refrigeration compartment 11 and the freezer compartment 12 can be more accurately and effectively controlled.

[0108] In some embodiments, referring to Figure 4 , the freezer compartment 12 is located above the refrigeration compartment 11, and the evaporator 15 is arranged at the bottom of the freezer compartment 12.

[0109] In the embodiments of the present application, it is considered that the evaporator 15 will generate heat (hot air) when defrosting, and the hot air will flow upwards, thereby affecting the temperature of the upper cavity of the refrigerator and causing temperature fluctuations in the upper cavity. If the upper cavity is the refrigeration compartment 11, the temperature of the refrigeration compartment 11 is relatively high (compared with the temperature of the freezer compartment), which can easily cause the temperature of the refrigeration compartment 11 to be too high and affect the preservation of food in the refrigeration compartment 11. If the freezer compartment 12 is arranged above the refrigeration compartment 11, i.e., the upper cavity is the freezer compartment 12, the temperature of the freezer compartment 12 is very low, and even if the heat generated by the defrosting of the evaporator 15 causes temperature fluctuations in the freezer compartment 12, the temperature fluctuations will not affect the low-temperature state of the freezer compartment (even if the temperature rises, the freezer compartment can still maintain a low-temperature state), i.e., the preservation of food in the freezer compartment 12 will not be affected.

[0110] In addition, since the evaporator 15 is arranged at the bottom of the freezing chamber 12, the hot air generated by defrosting of the evaporator 15 needs to flow upward first and then enter the freezing chamber 12 through the freezing air inlet 121 at the back side of the freezing chamber 12. Compared with the scheme in which the evaporator 15 is arranged at the back side of the freezing chamber 12 and the hot air generated by defrosting of the evaporator 15 can directly enter the freezing chamber 12 through the freezing air inlet 121 at the back side of the freezing chamber 12, the transmission path of the hot air is longer, so that the heat generated during the defrosting process is more difficult to be transmitted to the freezing chamber 12 through the freezing air inlet 121, and the influence of the defrosting process of the evaporator 15 on the temperature in the freezing chamber 12 can be further reduced.

[0111] In some embodiments, in order to increase the practical volume of the refrigerator, the evaporator 15 can be as thin as possible, for example, a small-diameter tube evaporator with a thickness of 40 mm and an outer diameter of 6.35 mm can be used. It can be understood that the application selects but is not limited to a small-diameter / aluminum tube evaporator. Optionally, in order to improve the heat exchange efficiency, a copper tube evaporator can be selected. Considering the cost factor, an evaporator with a thickness of 30 mm or other thicknesses can also be selected, and the application does not protect the selection of the evaporator 15.

[0112] In some embodiments, in order to further reduce the influence of the defrosting process of the evaporator 15 on the temperature in the freezing chamber 12, a cover plate can be arranged at the upper end of the evaporator 15, which can further block the heat generated during defrosting of the evaporator 15 from being transmitted to the freezing chamber 12.

[0113] Referring to Figure 6 , Figure 6 is a structural schematic view of an evaporator provided by an embodiment of the application. As shown in Figure 6 , a heating pipe 21 is arranged on the evaporator 15, and the heating pipes 21 are arranged from dense to sparse at the front, middle and rear of the evaporator 15.

[0114] In the double air duct independent circulation air path design in the embodiments of the present application, the refrigeration return air outlet 122 is arranged at the bottom of the front side of the refrigeration chamber 12, so that the cold air entering the refrigeration chamber 12 exchanges heat with the medium in the refrigeration chamber 12 and then returns to the front end of the evaporator 15 through the refrigeration return air outlet 122 at the bottom of the front side of the refrigeration chamber 12. The refrigeration return air outlet 112 is arranged at the top of the front side of the refrigeration chamber 11, so that the cold air entering the refrigeration chamber 11 exchanges heat with the medium in the refrigeration chamber 11 and then returns to the front end of the evaporator 15 through the refrigeration return air outlet 112 at the top of the front side of the refrigeration chamber 11. It can be seen that the return air of the refrigeration chamber 12 and the refrigeration chamber 11 is at the front end of the evaporator 15, and the return air flows from the front end to the rear end of the evaporator 15. The frost on the front part of the evaporator 15 is more serious, and the amount of frost on the middle and rear parts of the evaporator 15 decreases in turn. That is, the amount of frost on the front part of the evaporator 15 is greater than that on the middle part of the evaporator 15, which is greater than that on the rear part of the evaporator 15. In view of this, the heating pipes 21 are arranged from dense to sparse according to the front, middle and rear parts of the evaporator 15, that is, the heating pipes 21 arranged in the front part of the evaporator 15 are more dense, the heating pipes 21 arranged in the middle part of the evaporator 15 are less dense, and the heating pipes 21 arranged in the rear part of the evaporator 15 are relatively sparse. In this way, the defrosting uniformity and efficiency can be improved, and the defrosting time can be shortened.

[0115] In some embodiments, the evaporator 15 can be provided with a clamping groove, and the heating pipe 21 can be installed on the evaporator 15 through the clamping groove to form an integrated assembly with the evaporator 15. The heating pipe 21 is directly installed on the evaporator 15 through the clamping groove, so that the heating pipe 21 and the fins of the evaporator 15 can be in molecular-level contact, thereby improving the defrosting efficiency and saving the defrosting energy consumption. Integrating the heating pipe 21 with the evaporator 15 can improve the space utilization.

[0116] In some embodiments, the heating pipe 21 can be an aluminum pipe heating pipe. The aluminum pipe has high heat conductivity per unit mass, and can be used for direct contact defrosting. Compared with the existing defrosting scheme using heat radiation, the aluminum pipe heating pipe 21 can improve the defrosting uniformity and efficiency.

[0117] In some embodiments, referring to Figure 7 , Figure 7 is a schematic diagram of the mounting structure of the evaporator provided in the embodiments of the present application. Considering that the frost layer on the evaporator 15 will melt into water after defrosting, the evaporator 21 can be arranged obliquely at the bottom of the refrigeration chamber 12, that is, the mounting plane of the evaporator 15 body forms an angle with the horizontal plane, thereby facilitating the discharge of defrosting water.

[0118] In some embodiments, the inclination angle of the evaporator is in a range of 5-8 degrees. The inclination angle of 5-8 degrees is an optimal inclination angle range, that is, the inclination angle is greater than or equal to 5 degrees, so that the defrosting water can be basically drained, and the inclination angle is 8 degrees, so that the defrosting water is close to zero residue. The inclination angle is set in the range of 5-8 degrees, so that the effective drainage of the defrosting water can be ensured.

[0119] Referring to Figure 8 , Figure 8 is a schematic diagram of a refrigerator structure provided by an embodiment of the present application and comprising a drainage structure. In some embodiments, the freezing chamber 12 is located above the refrigerating chamber 11, that is, the upper cavity of the refrigerator is the freezing chamber 12. The evaporator cavity 14 of the freezing chamber 12 is provided with a drainage port 101, and the drainage port 101 is arranged at the lowest point of the inclined surface of the evaporator cavity 14. The drainage port 101 is in communication with a drainage pipe 102, and the drainage pipe 102 is arranged close to the back side of the refrigerating chamber 11. In the embodiment of the present application, since the defrosting water is drained downward by gravity in the drainage design, and the drainage pipe 102 is arranged at the back side of the refrigerating chamber 11, the problem of ice formation in the drainage pipe can be avoided. Compared with the arrangement that the evaporator is arranged at the top of the freezing chamber and the drainage pipe is arranged at the back side of the freezing chamber 12 and the refrigerating chamber 11, the drainage structure of the present application does not need to additionally arrange an anti-icing structure (such as a heating wire), so that the cost can be reduced.

[0120] In some embodiments, the refrigerator can further comprise a refrigerating temperature sensor. The refrigerating temperature sensor is arranged inside the refrigerating chamber 11. The refrigerating temperature sensor can be used to collect the temperature of the refrigerating chamber.

[0121] In some embodiments, the refrigerator can further comprise a controller. The controller is arranged inside the cabinet 1. The refrigerating temperature sensor, the compressor, the fan, the damper and the like are electrically connected to the controller respectively. The controller can be used to accurately control the temperature and environment in the refrigerator, so that the food is fresh and safe, and energy saving operation and fault protection are realized. For example, the controller can control the operation of the compressor, the fan and the damper based on the temperature collected by the refrigerating temperature sensor, so as to control the temperature of the refrigerating chamber 11 and the freezing chamber 12 of the refrigerator. The controller can also perform refrigeration system management, defrosting management, fan and light control, safety monitoring and alarm management.

[0122] Referring to Figure 9 , Figure 9 is a flowchart of a refrigerator control method provided by an embodiment of the present application. The refrigerator (controller) provided by the embodiment of the present application executes the refrigerator control method, which comprises but is not limited to steps S910 to S930.

[0123] In step S910, the change in the opening degree of the refrigerating air return port is identified.

[0124] If it is identified that the opening degree of the refrigeration return air inlet is adjusted to be small, the operation frequency of the compressor in the next refrigeration cycle is reduced, and the rotating speed of the fan is increased, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in the corresponding temperature ranges, respectively.

[0125] If it is identified that the opening degree of the refrigeration return air inlet is adjusted to be large, the operation frequency of the compressor in the next refrigeration cycle is increased, and the rotating speed of the fan is reduced, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in the corresponding temperature ranges, respectively.

[0126] In the embodiments of the present application, the refrigeration return air inlet is provided with a linearly moving adjustment mechanism 20. By adjusting the linearly moving adjustment mechanism 20, the opening degree of the refrigeration return air inlet 112 can be adjusted, so as to adjust the air distribution ratio of the refrigeration chamber 11 and the freezing chamber 12, thereby adjusting the temperatures of the refrigeration chamber 11 and the freezing chamber 12.

[0127] Considering that improper adjustment of the linearly moving adjustment mechanism 20 by the user can cause the temperature of the freezing chamber 12 or the refrigeration chamber 11 to be too high or too low, the embodiments of the present application identify the change of the opening degree of the refrigeration return air inlet, and control the operation frequency of the compressor and the rotating speed of the fan in the next refrigeration cycle according to the change of the opening degree of the refrigeration return air inlet, so that the temperatures of the refrigeration chamber and the freezing chamber can be maintained in the corresponding temperature ranges, respectively. Therefore, even if the linearly moving adjustment mechanism is adjusted at any position, the temperatures of the refrigeration chamber and the freezing chamber can be maintained in the appropriate temperature ranges, and the temperature of the freezing chamber or the refrigeration chamber can be prevented from deviating from the appropriate temperature range due to improper adjustment of the linearly moving adjustment mechanism.

[0128] Specifically, if the opening degree of the refrigeration return air inlet is adjusted to be small, the return air amount of the refrigeration chamber will decrease, the air cooling cycle of the refrigeration chamber will decrease, and the air cooling cycle of the freezing chamber will increase, which causes the cooling rate of the refrigeration chamber to decrease and the cooling rate of the freezing chamber to increase, thereby possibly causing the temperature of the freezing chamber to be too low (waste of energy consumption). Since the freezing chamber has a large load, it is more affected by the frequency of the compressor (i.e., the refrigerating capacity) than the refrigeration chamber, so the operation frequency of the compressor in the next refrigeration cycle can be reduced, so as to weaken the cooling rate of the freezing chamber and ensure that the temperature of the freezing chamber is not too low. At the same time, since the cooling rate of the refrigeration chamber is reduced, the rotating speed of the fan in the next refrigeration cycle can be increased, so as to accelerate the air cooling cycle of the refrigeration chamber (i.e., to increase the cooling rate of the refrigeration chamber), thereby making the change of the cooling rate of the refrigeration chamber not too large. That is, by reducing the operation frequency of the compressor and increasing the rotating speed of the fan in the next refrigeration cycle, the cooling rate of the freezing chamber can be weakened to prevent the temperature of the freezing chamber from being too low, and the change of the cooling rate of the refrigeration chamber can be ensured to be not too large.

[0129] For example, in the first refrigeration cycle, the cooling rate of the refrigeration chamber is constant, the compressor operating frequency is P2, and the fan speed is F2. In the second refrigeration cycle, the user adjusts the opening degree of the refrigeration return air inlet. In the second refrigeration cycle, the cooling rate of the refrigeration chamber decreases, and the cooling rate of the freezer chamber increases, which may cause the temperature of the freezer chamber to be too low. Therefore, in the third refrigeration cycle (i.e., the next refrigeration cycle), the compressor operating frequency is reduced to P1, and the fan speed is increased to F3. At this time, due to the increase in the fan speed, the overall cooling rate of the refrigeration chamber does not change too much; due to the decrease in the compressor operating frequency, the cooling rate of the freezer chamber decreases, thereby effectively preventing the waste of energy caused by the freezer chamber temperature being too low.

[0130] Similarly, if the opening degree of the refrigeration return air inlet is adjusted to be larger, the return air volume of the refrigeration chamber increases, the air cooling cycle of the refrigeration chamber increases, and the air cooling cycle of the freezer chamber decreases, which may cause the cooling rate of the refrigeration chamber to increase and the cooling rate of the freezer chamber to decrease, thereby causing the temperature of the freezer chamber to be too high (which affects the preservation of food). Since the freezer chamber has a large load, it is more affected by the compressor frequency (i.e., the refrigeration capacity) than the refrigeration chamber. Therefore, the compressor operating frequency in the next refrigeration cycle can be increased to increase the cooling rate of the freezer chamber and ensure that the temperature of the freezer chamber is not too high. At the same time, since the cooling rate of the refrigeration chamber increases, the fan speed in the next refrigeration cycle can be reduced to slow down the air cooling cycle of the refrigeration chamber (i.e., to weaken the cooling rate of the refrigeration chamber), so that the cooling rate of the refrigeration chamber does not change too much. That is, by increasing the compressor operating frequency and reducing the fan speed in the next refrigeration cycle, the cooling rate of the freezer chamber can be increased to prevent the temperature of the freezer chamber from being too high, and the cooling rate of the refrigeration chamber can be ensured to change not too much.

[0131] For example, in the first refrigeration cycle, the cooling rate of the refrigeration chamber is constant, the compressor operating frequency is P2, and the fan speed is F2. In the second refrigeration cycle, the user adjusts the opening degree of the refrigeration return air inlet. In the second refrigeration cycle, the cooling rate of the refrigeration chamber decreases, and the cooling rate of the freezer chamber increases, which may cause the temperature of the freezer chamber to be too low. Therefore, in the third refrigeration cycle (i.e., the next refrigeration cycle), the compressor operating frequency is reduced to P1, and the fan speed is increased to F3. At this time, due to the increase in the fan speed, the overall cooling rate of the refrigeration chamber does not change too much; due to the decrease in the compressor operating frequency, the cooling rate of the freezer chamber decreases, thereby effectively preventing the waste of energy caused by the freezer chamber temperature being too low.

[0132] In some embodiments, referring to Figure 10 , Figure 10 is a step flowchart for identifying the change in the opening degree of the refrigeration return air inlet. The step of identifying the change in the opening degree of the refrigeration return air inlet is performed by Figure 10As shown in FIG. 11, step S910 can be further subdivided into steps S1010-S1030.

[0133] Step S1010, detecting the compressor on-time in a single refrigeration cycle;

[0134] Step S1020, if the compressor on-time in the current refrigeration cycle is increased compared with the compressor on-time in the last refrigeration cycle, identifying that the opening degree of the refrigeration return air inlet is adjusted smaller;

[0135] Step S1030, if the compressor on-time in the current refrigeration cycle is decreased compared with the compressor on-time in the last refrigeration cycle, identifying that the opening degree of the refrigeration return air inlet is adjusted larger.

[0136] In the embodiments of the present application, if the opening degree of the refrigeration return air inlet is adjusted smaller, the return air amount of the refrigeration chamber will be decreased, the air cooling cycle of the refrigeration chamber will be reduced, and the cooling rate of the refrigeration chamber will be decreased. In order to reach the set temperature of the refrigeration chamber, the compressor on-time needs to be increased. If the opening degree of the refrigeration return air inlet is adjusted larger, the return air amount of the refrigeration chamber will be increased, the air cooling cycle of the refrigeration chamber will be increased, and the cooling rate of the refrigeration chamber will be increased. In order to reach the set temperature of the refrigeration chamber, the compressor on-time will be shortened. Therefore, according to this principle, the change of the opening degree of the refrigeration return air inlet can be identified by detecting the change of the compressor on-time.

[0137] Specifically, if the compressor on-time in the current refrigeration cycle is increased compared with the compressor on-time in the last refrigeration cycle, it can be determined that the opening degree of the refrigeration return air inlet is adjusted smaller. If the compressor on-time in the current refrigeration cycle is decreased compared with the compressor on-time in the last refrigeration cycle, it can be determined that the opening degree of the refrigeration return air inlet is adjusted larger. That is, the change of the opening degree of the refrigeration return air inlet can be identified by detecting the change of the compressor on-time in a single refrigeration cycle.

[0138] In some embodiments, referring to Figure 11 , Figure 11 is another step flow chart for identifying the opening degree change of the refrigeration return air inlet provided by an embodiment of the present application. As shown in FIG. 12, step S910 can be further subdivided into steps S1110-S1130. Figure 11

[0139] Step S1110, calculating the cooling rate of the refrigeration chamber in a single refrigeration cycle according to the refrigeration chamber temperature collected by the refrigeration temperature sensor;

[0140] Step S1120, if the cooling rate of the refrigeration chamber in the current refrigeration cycle is decreased compared with the cooling rate of the refrigeration chamber in the last refrigeration cycle, identifying that the opening degree of the refrigeration return air inlet is adjusted smaller; ​

[0141] If the cooling rate of the refrigerating chamber in the current refrigeration cycle is higher than that in the previous refrigeration cycle, it is identified that the opening degree of the refrigerating return air inlet is adjusted larger.

[0142] In the embodiments of the present application, it is considered that if the opening degree of the refrigerating return air inlet is adjusted smaller, the return air volume of the refrigerating chamber will decrease, the air cooling cycle of the refrigerating chamber will decrease, and the cooling rate of the refrigerating chamber will decrease. If the opening degree of the refrigerating return air inlet is adjusted larger, the return air volume of the refrigerating chamber will increase, the air cooling cycle of the refrigerating chamber will increase, and the cooling rate of the refrigerating chamber will increase. Therefore, according to this principle, in reverse, the change of the opening degree of the refrigerating return air inlet can be identified by detecting the change of the cooling rate of the refrigerating chamber.

[0143] Specifically, if it is detected that the cooling rate of the refrigerating chamber in the current refrigeration cycle is lower than that in the previous refrigeration cycle, it can be determined that the opening degree of the refrigerating return air inlet is adjusted smaller. If the cooling rate of the refrigerating chamber in the current refrigeration cycle is higher than that in the previous refrigeration cycle, it can be determined that the opening degree of the refrigerating return air inlet is adjusted larger. That is, the change of the opening degree of the refrigerating return air inlet can be identified by detecting the change of the cooling rate of the refrigerating chamber in a single refrigeration cycle.

[0144] It can be understood that, for those skilled in the art, equivalent replacements or changes can be made according to the technical solutions and the inventive concept of the present application, and all these changes or replacements shall belong to the protection scope of the present application.

Claims

1. A refrigerator characterized by comprising: The refrigerator comprises: a cabinet, in which a refrigeration chamber and a freezing chamber are arranged vertically; an evaporator arranged between the refrigeration chamber and the freezing chamber; a compressor connected to the evaporator, configured to provide power for refrigeration cycle of the refrigeration chamber and the freezing chamber; a freezing air duct arranged in the cabinet, in communication with the freezing chamber and forming a first air cooling circulation loop; a refrigeration air duct arranged in the cabinet, in communication with the refrigeration chamber and forming a second air cooling circulation loop; a supply air duct arranged at a rear end of the evaporator, with an air outlet end in communication with the refrigeration air duct and the freezing air duct respectively; a fan arranged near an air inlet end of the supply air duct, capable of sucking cold air generated by the evaporator into the supply air duct; a refrigeration air return port is arranged at a top of a front side of the refrigeration chamber, and a linear moving adjustment mechanism is arranged at the refrigeration air return port, capable of adjusting an opening degree of the refrigeration air return port to adjust a proportion of air distribution between the refrigeration chamber and the freezing chamber; a controller connected to the compressor and the fan respectively, configured to: identify a change in the opening degree of the refrigeration air return port, and control a running frequency of the compressor and a rotating speed of the fan in a next refrigeration cycle according to the change in the opening degree of the refrigeration air return port, so that temperatures of the refrigeration chamber and the freezing chamber can be maintained in corresponding temperature ranges respectively.

2. The refrigerator according to claim 1, characterized in that, The identification of the change in the opening degree of the refrigeration air return port comprises: detecting a running time of the compressor in a single refrigeration cycle; if the running time of the compressor in a current refrigeration cycle is longer than that in a previous refrigeration cycle, it is identified that the opening degree of the refrigeration air return port is adjusted smaller; if the running time of the compressor in a current refrigeration cycle is shorter than that in a previous refrigeration cycle, it is identified that the opening degree of the refrigeration air return port is adjusted larger.

3. The refrigerator according to claim 1, characterized in that, The refrigerator further comprises a refrigeration temperature sensor arranged inside the refrigeration chamber, used to collect a refrigeration chamber temperature; correspondingly, the identification of the change in the opening degree of the refrigeration air return port comprises: calculating a refrigeration chamber temperature drop rate in a single refrigeration cycle according to the refrigeration chamber temperature collected by the refrigeration temperature sensor; if the refrigeration chamber temperature drop rate in a current refrigeration cycle is lower than that in a previous refrigeration cycle, it is identified that the opening degree of the refrigeration air return port is adjusted smaller; if the refrigeration chamber temperature drop rate in a current refrigeration cycle is higher than that in a previous refrigeration cycle, it is identified that the opening degree of the refrigeration air return port is adjusted larger.

4. The refrigerator according to any one of claims 1 to 3, characterized in that, The control of the running frequency of the compressor and the rotating speed of the fan in a next refrigeration cycle according to the change in the opening degree of the refrigeration air return port, so that temperatures of the refrigeration chamber and the freezing chamber can be maintained in corresponding temperature ranges respectively, comprises: If it is identified that the opening degree of the refrigeration return air inlet is adjusted to be small, the operation frequency of the compressor in the next refrigeration cycle is reduced, and the rotating speed of the fan is increased, so that the temperature of the refrigeration chamber and the freezing chamber can be maintained in the corresponding temperature range, respectively. If it is identified that the opening degree of the refrigeration return air inlet is adjusted to be large, the operation frequency of the compressor in the next refrigeration cycle is increased, and the rotating speed of the fan is reduced, so that the temperature of the refrigeration chamber and the freezing chamber can be maintained in the corresponding temperature range, respectively.

5. The refrigerator according to claim 1, wherein the freezing air duct is arranged close to the back side of the freezing chamber, and the back side of the freezing chamber is provided with at least one freezing air inlet, and the bottom of the front side of the freezing chamber is provided with a freezing return air inlet, and the freezing air inlet is communicated with the freezing air duct. The refrigeration air duct is arranged close to the back side of the refrigeration chamber, and the back side of the refrigeration chamber is provided with at least one refrigeration air inlet, and the refrigeration air inlet is communicated with the refrigeration air duct. The freezing chamber is arranged above the refrigeration chamber, and the evaporator is arranged obliquely at the bottom of the freezing chamber.

6. The refrigerator according to claim 1, characterized in that, The oblique angle of the evaporator is arranged in the range of 5-8 degrees.

7. The refrigerator according to claim 6, characterized in that The heating pipe is arranged on the evaporator, and the heating pipe is arranged from dense to sparse at the front, middle and rear of the evaporator.

8. The refrigerator according to claim 1, characterized in that, The evaporator is provided with a clamping groove, and the heating pipe is installed on the evaporator through the clamping groove to form an integrated assembly with the evaporator.

9. The refrigerator according to claim 8, characterized in that, The heating pipe is an aluminum pipe heating pipe.

10. The refrigerator according to claim 8 or 9, characterized in that, ​

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