Refrigerator and control method thereof

Abstract

The invention discloses a refrigerator and a control method thereof, relates to the technical field of refrigerators, and aims to solve the problem of high energy consumption of a single-system refrigerator in the prior art. The refrigerator comprises a refrigerating system, a first temperature sensor, a second temperature sensor and a controller. The refrigerating system comprises a compressor, a first condenser, a throttling device and an evaporator which are sequentially communicated through pipelines to form a circulation loop of refrigerants. The refrigerating system further comprises a condensation fan. The first temperature sensor is arranged at an outlet of the first condenser and used for detecting the first temperature of the outlet of the first condenser. The second temperature sensor is arranged outside the refrigerator and used for detecting the environment temperature outside the refrigerator; the controller is configured to obtain the current first temperature of an outlet of the first condenser and the current environment temperature outside the refrigerator and calculate the current first temperature difference between the current first temperature and the current environment temperature. Adjusting the rotating speed of the condensate fan according to the current first temperature difference. The refrigerator is used for storing food.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a control method thereof. Background Art

[0002] Single-system refrigerators have only one refrigeration system, and use the same refrigeration system to cool both the freezer and refrigerator compartments. The new standards issued by Europe have set higher requirements for the energy efficiency and noise of refrigerators. As energy prices in Europe increase, consumers are also paying more attention to the energy consumption level of home appliances. Therefore, single-system refrigerators exported to Europe need to meet the requirements of high energy efficiency and low noise.

[0003] In the related art, a single-system refrigerator includes a bottom condenser and a back condenser connected in series, and a condensing fan is provided at the bottom condenser to cool the bottom condenser through the condensing fan. The speed of the condensing fan is adjusted according to the change of the ambient temperature outside the refrigerator to improve the cooling effect on the condenser, thereby adjusting the condensing effect of the bottom condenser so that the condensing effect of the bottom condenser can meet the refrigeration demand of the refrigerator.

[0004] However, the above adjustment method cannot take into account the amount of gaseous refrigerant and liquid refrigerant in the refrigerant condensed by the bottom condenser after the condensation efficiency of the bottom condenser changes. When there is a lot of gaseous refrigerant, the gaseous refrigerant cannot be fully condensed in the back condenser, resulting in a lot of gaseous refrigerant entering the evaporator, resulting in insufficient heat exchange of the refrigerant in the evaporator, and when the refrigerant flows through the return air pipe, the temperature of the return air pipe is low, which will increase the load of the compressor, and further increase the energy consumption of the single-system refrigerator. Summary of the invention

[0005] The embodiments of the present invention provide a refrigerator and a control method thereof, which solve the problem of high energy consumption of a single-system refrigerator in the related art.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] According to the first aspect involved in the present application, a refrigerator is provided, comprising a refrigeration system, a first temperature sensor, a second temperature sensor and a controller, the refrigeration system comprising a compressor, a first condenser, a throttling device and an evaporator which are connected in sequence through a pipeline to form a circulation loop of a refrigerant; the refrigeration system also comprises a condensing fan, which is used to blow air to the first condenser; the first temperature sensor is arranged at the outlet of the first condenser, and is used to detect a first temperature of the outlet of the first condenser; the second temperature sensor is arranged outside the refrigerator, and is used to detect the ambient temperature outside the refrigerator; the controller is connected to the condensing fan, the first temperature sensor and the second temperature sensor, and is configured to: obtain the current first temperature of the outlet of the first condenser and the current ambient temperature outside the refrigerator, and calculate the current first temperature difference between the current first temperature and the current ambient temperature; and adjust the speed of the condensing fan according to the current first temperature difference.

[0008] The refrigerator provided by the present application can refrigerate the refrigerator by flowing the refrigerant in the refrigerant circulation loop formed by the compressor, the first condenser, the throttling device and the evaporator. During the refrigeration process of the refrigerator, the current first temperature difference between the current first temperature of the outlet of the first condenser and the current ambient temperature outside the refrigerator can reflect the condensation effect of the first condenser at the current moment and the content of the gaseous refrigerant at the outlet of the first condenser. Therefore, adjusting the speed of the condensing fan according to the current first temperature difference can ensure the condensation effect of the condensing fan, and can avoid to a certain extent the excessive content of the gaseous refrigerant in the refrigerant at the outlet of the first condenser, thereby reducing the influence of the adjustment of the speed of the condensing fan on the return air pipe temperature, so as to avoid the return air pipe temperature being too low and resulting in high energy consumption of the refrigerator.

[0009] In some embodiments, the refrigerator further comprises a flow regulating component, a third temperature sensor and a fourth temperature sensor, wherein the flow regulating component is connected in series between the throttling device and the first condenser, and is used to regulate the flow of the refrigerant entering the throttling device; the third temperature sensor is arranged at the inlet of the evaporator, and is used to detect the inlet temperature of the evaporator; the fourth temperature sensor is arranged at the outlet of the evaporator, and is used to detect the second temperature of the outlet of the evaporator; the controller is connected to the flow regulating component, the third temperature sensor and the fourth temperature sensor, and is further configured to: obtain the current inlet temperature of the evaporator and the current second temperature of the outlet of the evaporator, and calculate the current second temperature difference between the current inlet temperature and the current second temperature; determine whether the initial speed when the compressor is started is greater than or equal to the preset speed; if the initial speed is greater than or equal to the preset speed, determine whether the current second temperature difference is greater than the preset temperature difference; if the current second temperature difference is greater than the preset temperature difference, control the flow regulating component to increase the flow of the refrigerant entering the throttling device; when the current second temperature difference is greater than the preset temperature difference, increasing the flow of the refrigerant entering the throttling device can improve the heat exchange effect of the refrigerant in the evaporator, thereby ensuring the temperature of the return air pipe, and further reducing the load of the compressor to reduce the energy consumption of the refrigerator.

[0010] In some embodiments, before the controller executes the acquisition of the current inlet temperature of the evaporator and the current second temperature of the outlet of the evaporator, it is also configured to: acquire the initial speed when the compressor is started; determine the target speed range in which the initial speed is located, the target speed range is one of multiple preset speed ranges; determine a first target flow rate according to the target speed range, the first target flow rate is one of multiple preset flow rates, and the multiple preset speed ranges correspond one-to-one to the multiple preset flow rates; adjust the flow rate of the refrigerant entering the throttling device to the first target flow rate through the flow regulating component; through the one-to-one correspondence between multiple preset speed ranges and multiple preset flow rates, the heat exchange between the refrigerant and the evaporator can be made relatively stable, and then the impact of the refrigerant flow rate on the temperature of the return air pipe can be preliminarily reduced, so as to preliminarily reduce the impact of the refrigerant flow rate on the load of the compressor.

[0011] In some embodiments, the controller executes a control flow regulating component to increase the flow rate of the refrigerant entering the throttling device, and is configured to: determine a second target flow rate according to a target speed range, the second target flow rate is one of a plurality of preset adjusted flow rates, the plurality of preset speed ranges correspond one-to-one to the plurality of preset adjusted flow rates, and the second target flow rate is greater than the first target flow rate; adjust the flow rate of the refrigerant entering the throttling device to the second target flow rate through the flow regulating component; in this way, the second target flow rate of the refrigerant entering the throttling device can be quickly determined, so that the flow rate of the refrigerant entering the throttling device can be adjusted in time to quickly adjust the temperature of the return air pipe.

[0012] In some embodiments, the controller adjusts the speed of the condensing fan according to the current first temperature difference, and is configured to: determine the target temperature difference interval in which the current first temperature difference is located, the target temperature difference interval is one of multiple preset temperature difference intervals; determine the target operating speed of the condensing fan according to the target temperature difference interval, the target operating speed is one of multiple preset operating speeds, and the multiple preset temperature difference intervals correspond one-to-one to the multiple preset operating speeds; control the condensing fan to operate at the target operating speed; through the above settings, the target operating speed of the condensing fan can be quickly obtained, so that the speed of the condensing fan can be adjusted in time.

[0013] In some embodiments, the throttling device includes multiple capillaries, and the outlets of the multiple capillaries are connected to the inlet of the evaporator; the flow regulating component includes an electric switching valve, which is connected to the inlets of the multiple capillaries and is used to block or open at least one capillary; the flow rates of the capillaries are different, and the electric switching valve adjusts the flow rate of the refrigerant entering the throttling device by opening different capillaries or opening different numbers of capillaries; or, the flow rates of the capillaries are the same, and the electric switching valve adjusts the flow rate of the refrigerant entering the throttling device by opening different numbers of capillaries; the method of adjusting the flow rate of the refrigerant entering the throttling device by the number of capillaries or the different flow rates of different capillaries is relatively simple and easy to implement.

[0014] In some embodiments, after the controller determines whether the current second temperature difference is greater than the preset temperature difference, it is also configured to: if the current second temperature difference is less than or equal to the preset temperature difference, maintain the flow rate of the refrigerant entering the throttling device at the first target flow rate; and / or, the controller executes to obtain the initial speed of the compressor when it starts, and is configured to: determine the initial speed based on the correspondence between the start-up rate of the compressor and the preset start-up speed of the compressor; set the start-up speed of the compressor based on the start-up rate of the compressor, so that the start-up speed of the compressor can be more appropriate to reduce the energy consumption of the compressor.

[0015] According to the second aspect of the present application, a refrigerator control method is provided, including: obtaining the current first temperature of the outlet of the first condenser and the current ambient temperature outside the refrigerator, and calculating the current first temperature difference between the current first temperature and the current ambient temperature; adjusting the speed of the condensing fan according to the current first temperature difference.

[0016] In some embodiments, the refrigerator control method also includes: obtaining the current inlet temperature of the evaporator and the current second temperature of the outlet of the evaporator, and calculating the current second temperature difference between the current inlet temperature and the current second temperature; judging whether the initial speed when the compressor is started is greater than or equal to the preset speed; if the initial speed is greater than or equal to the preset speed, judging whether the current second temperature difference is greater than the preset temperature difference; if the current second temperature difference is greater than the preset temperature difference, controlling the flow regulating component to increase the flow of refrigerant entering the throttling device.

[0017] In some embodiments, before obtaining the current inlet temperature of the evaporator and the current second temperature of the outlet of the evaporator, it also includes: obtaining the initial speed when the compressor is started; determining the target speed range in which the initial speed is located, the target speed range is one of multiple preset speed ranges; determining a first target flow rate according to the target speed range, the first target flow rate is one of multiple preset flow rates, and multiple preset speed ranges correspond one-to-one to multiple preset flow rates; and adjusting the flow rate of the refrigerant entering the throttling device to the first target flow rate through a flow regulating component.

[0018] It should be noted that the technical effects brought about by the implementation method of the second aspect can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the structural schematic diagrams of the refrigerator in the embodiment of the present application;

[0020] Figure 2 This is a partial structural schematic diagram of a refrigerator in an embodiment of the present application;

[0021] Figure 3 This is a schematic cross-sectional structural diagram of a refrigerator in an embodiment of the present application;

[0022] Figure 4 This is the second structural diagram of the refrigerator in the embodiment of the present application;

[0023] Figure 5 This is the third structural diagram of the refrigerator in the embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the connection relationship between the components of the refrigeration system in the embodiment of the present application;

[0025] Figure 7 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 8 This is one of the schematic diagrams of the connection relationship between the controller and various components in the embodiment of the present application;

[0027] Fig. 9 This is the second schematic diagram of the connection relationship between the controller and various components in the embodiment of the present application;

[0028] Fig.10 This is one of the flow charts of the refrigerator control method in the embodiment of the present application;

[0029] Fig.11 This is the second flow chart of the refrigerator control method in the embodiment of the present application;

[0030] Fig.12This is the third flow chart of the refrigerator control method in the embodiment of the present application;

[0031] Fig.13 This is a fourth flow chart of the refrigerator control method in the embodiment of the present application;

[0032] Fig.14 This is the fifth flow chart of the refrigerator control method in the embodiment of the present application;

[0033] Fig.15 This is the sixth flow chart of the refrigerator control method in the embodiment of the present application;

[0034] Fig.16 This is the seventh flow chart of the refrigerator control method in the embodiment of the present application;

[0035] Fig.17 This is the eighth flow chart of the refrigerator control method in the embodiment of the present application.

[0036] Reference numerals:

[0037] 1-box; 11-storage room; 111-refrigerating room; 112-freezing room; 12-freezing air duct; 13-refrigerating air duct; 14-return air duct; 15-installation cavity;

[0038] 2- portal;

[0039] 3-refrigeration system; 31-compressor; 32-first condenser; 33-throttling device; 331-capillary tube; 34-evaporator; 35-return air pipe; 36-circulation fan; 37-second condenser; 38-condensing fan;

[0040] 4- first temperature sensor;

[0041] 5- Second temperature sensor;

[0042] 6- Controller;

[0043] 7-flow regulating assembly; 71-electric switching valve;

[0044] 8- third temperature sensor;

[0045] 9- Fourth temperature sensor. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0047] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0050] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0051] As a common household appliance, refrigerators are widely used in daily life. Refrigerators include single-system refrigerators and double-system refrigerators. Among them, single-system refrigerators are widely used because of their simple use and low price.

[0052] In the related art, the change in the rotation speed of the condensing fan of the single-system refrigerator causes insufficient condensation of the refrigerant by the bottom condenser, resulting in a lower temperature of the return air pipe, which in turn leads to higher energy consumption of the single-system refrigerator.

[0053] Based on this, the embodiment of the present application provides a refrigerator, such as Figure 1As shown, the refrigerator includes a box body 1 and a door body 2. A storage chamber 11 with an opening on one side is formed in the box body 1, and the storage chamber 11 is defined as a refrigerating chamber 111 and a freezing chamber 112 isolated from each other. The door body 2 is arranged at the opening for opening or closing the opening.

[0054] The refrigerating chamber 111 and the freezing chamber 112 are both used to store food, and the temperature of the refrigerating chamber 111 is higher than the temperature of the freezing chamber 112. Figure 2 As shown, the refrigerator further includes a refrigeration system 3. The refrigeration system 3 is arranged in the housing 1, and is used to adjust the temperature of the refrigerating chamber 111 and the temperature of the freezing chamber 112, so as to improve the storage effect of the freezing chamber 112 and the refrigerating chamber 111 on food.

[0055] like Figure 3 As shown, a freezing air duct 12 and a refrigerating air duct 13 are also formed in the box body 1. Figure 4 As shown, the air inlet of the freezing air duct 12 and the air outlet of the freezing air duct 12 are both connected to the freezing chamber 112. Figure 5 As shown, the freezing air duct 12 is connected to the freezing chamber 112 to form a freezing circulation air path of the freezing chamber 112 (such as Figure 5 The temperature of the freezing chamber 112 can be adjusted by cooling the air in the freezing cycle through the refrigeration system 3.

[0056] like Figure 4 As shown, the air inlet of the refrigerating air duct 13 is connected to the air outlet of the freezing air duct 12, the air outlet of the refrigerating air duct 13 is connected to the refrigerating chamber 111, and the refrigerating chamber 111 is connected to the return air outlet of the freezing air duct 12. Specifically, a return air duct 14 is also formed in the cabinet 1, the inlet of the return air duct 14 is connected to the refrigerating chamber 111, and the outlet of the return air duct 14 is connected to the return air outlet of the freezing air duct 12, so that the refrigerating chamber 111 is connected to the return air outlet of the freezing air duct 12 through the return air duct 14.

[0057] like Figure 5 As shown, the refrigeration air duct 12, the refrigeration air duct 13, the refrigeration chamber 111 and the return air duct 14 are connected in sequence to form a refrigeration circulation air path of the refrigeration chamber 111 (as shown in FIG. Figure 5 The temperature of the refrigerating chamber 111 can be adjusted by cooling the air in the refrigerating circulating air path 111 through the refrigerating system 3.

[0058] Specifically, Figure 6 As shown, the refrigeration system 3 includes a compressor 31, a first condenser 32, a throttling device 33 and an evaporator 34 which are sequentially connected through pipelines to form a circulation loop of the refrigerant. The refrigeration system 3 also includes a return air pipe 35, and the outlet of the evaporator 34 is connected to the inlet of the compressor 31 through the return air pipe 35.

[0059] like Figure 7As shown, the evaporator 34 is disposed in the freezing air duct 12. The refrigerator further includes a circulation fan 36, which is also disposed in the freezing air duct 12.

[0060] When the refrigeration system 3 is in operation, the refrigerant in the refrigeration system 3 is compressed into a high-temperature and high-pressure refrigerant by the compressor 31. The high-temperature and high-pressure refrigerant flows out of the compressor 31 and enters the first condenser 32, and is condensed into a high-temperature and high-pressure liquid refrigerant by the first condenser 32. The high-temperature and high-pressure liquid refrigerant enters the throttling device 33, and is throttled and reduced in pressure by the throttling device 33 to be a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant flows out of the throttling device 33 and enters the evaporator 34, and is evaporated into a low-temperature and low-pressure gaseous refrigerant by the evaporator 34. After the low-temperature and low-pressure gaseous refrigerant flows out of the evaporator 34, it passes through the return air pipe 35 and enters the compressor 31 to be compressed again.

[0061] In which, during the evaporation process of the refrigerant in the evaporator 34, the refrigerant will exchange heat with the air in the freezing air duct 12, thereby reducing the air temperature in the freezing air duct 12. Under the action of the circulating fan 36, the air with reduced temperature can reduce the temperature of the freezing chamber 112 in the process of flowing through the freezing chamber 112 through the freezing circulating air path, and can reduce the temperature of the refrigerating chamber 111 in the process of flowing through the refrigerating chamber 111 through the refrigerating circulating air path.

[0062] In addition, if Figure 2 As shown, the lower end of the housing 1 is also formed with an installation cavity 15. The compressor 31 and the first condenser 32 can be arranged in the installation cavity 15. Figure 6 As shown, the refrigeration system 3 may further include a second condenser 37. The second condenser 37 is disposed in the interlayer at the back of the box body 1 and is connected in series between the first condenser 32 and the throttling device 33. In this way, after the refrigerant flows through the first condenser 32 for condensation, it will enter the second condenser 37 and be condensed again in the second condenser 37, thereby improving the condensation effect of the refrigerant.

[0063] It should be noted that the throttling device 33 can be a capillary tube, a thermal expansion valve, an electric expansion valve, etc.

[0064] Since the refrigerant releases heat during the condensation process in the first condenser 32 , the temperature of the condenser will increase, which will affect the condensation effect and temperature of the refrigerant, and further affect the refrigeration effect of the refrigeration system 3 .

[0065] Therefore, in order to improve the refrigeration effect of the refrigeration system 3, as Figure 2As shown, the refrigerator further includes a condensing fan 38. The condensing fan 38 is disposed in the installation cavity 15 and is located on one side of the first condenser 32. The condensing fan 38 is used to blow air toward the first condenser 32 to cool and dissipate heat of the first condenser 32, thereby improving the condensation effect of the first condenser 32 on the refrigerant.

[0066] During the operation of the refrigeration system 3, the speed of the condensing fan 38 usually changes with the change of the ambient temperature outside the refrigerator. In order to reduce the situation where the temperature of the return air pipe 35 is low due to the change of the speed of the condensing fan 38, as shown in FIG. Figure 8 As shown, the refrigerator further includes a first temperature sensor 4 , a second temperature sensor 5 and a controller 6 .

[0067] The first temperature sensor 4 is arranged at the outlet of the first condenser 32, and is used to detect the first temperature of the outlet of the first condenser 32 (ie, the outlet temperature of the first condenser 32); the second temperature sensor 5 is arranged outside the refrigerator, and is used to detect the ambient temperature outside the refrigerator.

[0068] The controller 6 is connected to the condensing fan 38 , the first temperature sensor 4 and the second temperature sensor 5 . The controller 6 can receive the first temperature detected by the first temperature sensor 4 and the ambient temperature detected by the second temperature sensor 5 , and can control the rotation speed of the condensing fan 38 .

[0069] The controller 6 is configured to: obtain the current first temperature of the outlet of the first condenser 32 and the current ambient temperature outside the refrigerator, and calculate the current first temperature difference between the current first temperature and the current ambient temperature; and adjust the rotation speed of the condensing fan 38 according to the current first temperature difference.

[0070] Since the temperature of the gaseous refrigerant is higher than that of the liquid refrigerant, the first temperature at the outlet of the first condenser 32 can reflect the amount of the gaseous refrigerant in the refrigerant at the outlet of the first condenser 32 .

[0071] The change of the ambient temperature outside the refrigerator may affect the heat dissipation effect of the first condenser 32 , thereby affecting the condensation effect of the first condenser 32 .

[0072] Therefore, according to the current first temperature at the outlet of the first condenser 32 and the current ambient temperature outside the refrigerator, the condensation effect of the first condenser 32 and the content of the gaseous refrigerant at the outlet of the first condenser 32 at the current moment can be reflected.

[0073] In this way, adjusting the speed of the condensing fan 38 according to the current first temperature difference can ensure the condensation effect of the condensing fan 38, and can avoid excessive content of gaseous refrigerant in the refrigerant at the outlet of the first condenser 32 to a certain extent, thereby reducing the influence of the adjustment of the speed of the condensing fan 38 on the temperature of the return air pipe 35, so as to avoid the high energy consumption of the refrigerator caused by the excessively low temperature of the return air pipe 35.

[0074] Among them, adjusting the speed of the condensing fan 38 according to the current first temperature difference can be achieved by making the first temperature difference and the speed of the condensing fan 38 have a linear relationship (i.e., a functional relationship). At this time, after obtaining the current first temperature difference, the current speed of the condensing fan 38 can be obtained according to the functional relationship, so that the condensing fan 38 can be controlled to run at the current speed.

[0075] It should be noted that the first temperature difference is positively correlated with the rotation speed of the condensing fan 38 , that is, the larger the first temperature difference is, the higher the rotation speed of the condensing fan 38 should be.

[0076] Adjusting the speed of the condensing fan 38 according to the current first temperature difference can also be achieved in other ways. Exemplarily, the controller 6 performs adjusting the speed of the condensing fan 38 according to the current first temperature difference, and is configured to: determine the target temperature difference interval where the current first temperature difference is located, and the target temperature difference interval is one of multiple preset temperature difference intervals; determine the target operating speed of the condensing fan 38 according to the target temperature difference interval, and the target operating speed is one of multiple preset operating speeds, and multiple preset temperature difference intervals correspond to multiple preset operating speeds one by one; control the condensing fan 38 to work according to the target operating speed.

[0077] That is to say, the range of the first temperature difference (0 to +∞) is divided into multiple intervals in advance to form multiple preset temperature difference intervals, and multiple speeds are set between the minimum speed and the maximum speed of the condensing fan 38 in advance to form multiple preset operating speeds, and then the multiple preset temperature difference intervals are made to correspond one by one to the multiple preset operating speeds.

[0078] Table 1

[0079] Preset temperature difference range A Preset operating speed A≥15℃ 1140r / min 10℃≤A＜15℃ 1000r / min 5℃≤A＜10℃ 800r / min 0℃≤A＜5℃ 0r / min

[0080] For example, as shown in Table 1, multiple preset temperature difference intervals A may be: 0°C≤A<5°C, 5°C≤A<10°C, 10°C≤A<15°C, A≥15°C. Multiple preset operating speeds may be 0r / min, 800r / min, 1000r / min, 1140r / min. Moreover, when the preset temperature difference interval A is 0°C≤A<5°C, the corresponding preset operating speed is 0r / min, when the preset temperature difference interval A is 5°C≤A<10°C, the corresponding preset operating speed is 800r / min, when the preset temperature difference interval A is 10°C≤A<15°C, the corresponding preset operating speed is 1000r / min, and when the preset temperature difference interval A is A≥15°C, the corresponding preset operating speed is 1140r / min.

[0081] It should be noted that the preset temperature difference interval can be divided and the preset operating speed can be set according to the actual conditions such as the operating power of the refrigerator and the usage scenario of the refrigerator. In addition, the first temperature difference is the difference between the first temperature at the outlet of the condenser and the ambient temperature outside the refrigerator. Generally, the larger the first temperature difference, the higher the speed of the condensing fan 38 should be.

[0082] By one-to-one correspondence between multiple preset temperature difference intervals and multiple preset operating speeds, when the target temperature difference interval in which the current first temperature difference is located is determined, the target operating speed of the condensing fan 38 can be quickly obtained, so that the speed of the condensing fan 38 can be adjusted in time.

[0083] Furthermore, by providing a one-to-one correspondence between a plurality of preset temperature difference intervals and a plurality of preset operating speeds, it is also possible to avoid frequent adjustment of the speed of the condensing fan 38 , thereby ensuring the stability of the operation of the condensing fan 38 .

[0084] In some embodiments, in order to further ensure that the temperature of the return air pipe 35 is within a suitable range, such as Fig. 9 As shown, the refrigerator further includes a flow regulating component 7, a third temperature sensor 8 and a fourth temperature sensor 9.

[0085] The flow regulating component 7 is connected in series between the throttling device 33 and the first condenser 32, and is used to regulate the flow of the refrigerant entering the throttling device 33; the third temperature sensor 8 is arranged at the inlet of the evaporator 34, and is used to detect the inlet temperature of the evaporator 34; the fourth temperature sensor 9 is arranged at the outlet of the evaporator 34, and is used to detect the second temperature of the outlet of the evaporator 34.

[0086] The controller 6 is connected to the flow regulating assembly 7, the third temperature sensor 8 and the fourth temperature sensor 9. The controller 6 can receive the inlet temperature of the evaporator 34 detected by the third temperature sensor 8 and the second temperature of the outlet of the evaporator 34 detected by the fourth temperature sensor 9, and the controller 6 can also control the flow regulating assembly 7 to operate.

[0087] The controller 6 is also configured to: obtain the current inlet temperature of the evaporator 34 and the current second temperature of the outlet of the evaporator 34, and calculate the current second temperature difference between the current inlet temperature and the current second temperature; determine whether the initial speed of the compressor 31 when it is started is greater than or equal to the preset speed; if the initial speed is greater than or equal to the preset speed, determine whether the current second temperature difference is greater than the preset temperature difference; if the current second temperature difference is greater than the preset temperature difference, control the flow regulating component 7 to increase the flow of the refrigerant entering the throttling device 33.

[0088] It should be noted that the preset speed is a relatively small speed, for example, the preset speed may be 1100 r / min, 1200 r / min, 1300 r / min, etc. The preset temperature difference is also a relatively small value, for example, the preset temperature difference may be 2° C., 2.5° C., 3° ​​C., etc. The second temperature difference is the difference between the inlet temperature of the evaporator 34 and the second temperature at the outlet of the evaporator 34 .

[0089] When the initial speed of the compressor 31 is less than the preset speed, it means that the power of the compressor 31 is low, that is, the refrigeration capacity demand of the refrigerator is relatively low. At this time, there is no need to adjust the flow rate of the refrigerant entering the throttling device 33, and it is only necessary to make the flow rate of the refrigerant entering the throttling device 33 the initial flow rate.

[0090] When the initial speed of the compressor 31 is greater than or equal to the preset speed, the refrigeration capacity demand of the refrigerator is relatively high. At this time, the flow rate of the refrigerant entering the throttling device 33 can be adjusted according to the current second temperature difference between the inlet temperature of the evaporator 34 and the second temperature of the outlet of the evaporator 34, thereby further adjusting the temperature of the return air pipe 35.

[0091] If the current second temperature difference is greater than the preset temperature difference, it means that the heat exchange effect between the refrigerant flowing through the evaporator 34 and the air in the refrigeration duct 12 is poor. Therefore, the flow rate of the refrigerant entering the throttling device 33 can be increased to increase the amount of refrigerant entering the evaporator 34, thereby improving the heat exchange effect between the refrigerant and the air in the refrigeration duct 12.

[0092] In this way, the temperature of the refrigerant after passing through the evaporator 34 can be guaranteed, thereby ensuring the temperature of the return air pipe 35, and further ensuring the temperature of the refrigerant entering the compressor 31, so as to reduce the load of the compressor 31 and thus reduce the energy consumption of the refrigerator.

[0093] When the current second temperature is less than or equal to the preset temperature, it means that the heat exchange effect between the refrigerant flowing through the evaporator 34 and the air in the refrigeration duct 12 is better, and the temperature of the refrigerant after passing through the evaporator 34 is better. At this time, the temperature of the return air pipe 35 can be guaranteed. Therefore, there is no need to adjust the flow rate of the refrigerant entering the throttling device 33, and the flow rate of the refrigerant entering the throttling device 33 can be the initial flow rate.

[0094] That is, after the controller 6 determines whether the current second temperature difference is greater than the preset temperature difference, it is further configured to: if the current second temperature difference is less than or equal to the preset temperature difference, keep the flow rate of the refrigerant entering the throttling device 33 at the first target flow rate. The first target flow rate is the initial flow rate, and the first target flow rate can be determined according to the initial speed of the compressor 31 (the specific relationship between the two will be described in detail later).

[0095] The flow regulating component 7 may be a flow regulating valve, such as a butterfly valve, a ball valve, etc.

[0096] The flow regulating assembly 7 may also include an electric switching valve 71. Figure 6 As shown, the throttling device 33 includes a plurality of capillaries 331 . The outlets of the plurality of capillaries 331 are connected to the inlet of the evaporator 34 ; the electric switching valve 71 is connected to the inlet of the plurality of capillaries 331 to block or conduct at least one capillary 331 .

[0097] Exemplarily, the electric switching valve 71 has an inlet and multiple outlets, the inlet of the electric switching valve 71 is connected to the outlet of the second condenser 37, the multiple outlets of the electric switching valve 71 correspond one-to-one to the multiple capillaries 331, and one outlet of the electric switching valve 71 is connected to the inlet of a capillary tube 331. The flow rate of the refrigerant entering the throttling device 33 is regulated by opening or blocking different capillaries 331 through the electric switching valve 71.

[0098] Specifically, the flow rates of the capillaries 331 may be different or the same. When the flow rates of the capillaries 331 are different, the electric switching valve 71 adjusts the flow rate of the refrigerant entering the throttling device 33 by connecting different capillaries 331 or connecting different numbers of capillaries 331; when the flow rates of the capillaries 331 are the same, the electric switching valve 71 adjusts the flow rate of the refrigerant entering the throttling device 33 by connecting different numbers of capillaries 331.

[0099] On this basis, in order to reduce the influence of the flow rate of the refrigerant entering the evaporator 34 on the temperature of the return air pipe 35 , the flow rate of the refrigerant entering the throttling device 33 can be set in advance according to the rotation speed of the compressor 31 .

[0100] Specifically, before the controller 6 executes the acquisition of the current inlet temperature of the evaporator 34 and the current second temperature of the outlet of the evaporator 34, it is also configured to: acquire the initial speed of the compressor 31 when it is started; determine the target speed range in which the initial speed is located, the target speed range is one of multiple preset speed ranges; determine a first target flow rate according to the target speed range, the first target flow rate is one of multiple preset flow rates, and the multiple preset speed ranges correspond one-to-one to the multiple preset flow rates; and adjust the flow rate of the refrigerant entering the throttling device 33 to the first target flow rate through the flow regulating component 7.

[0101] That is to say, the speed range of the compressor 31 (i.e., the range between the minimum speed and the maximum speed of the compressor 31) is divided into multiple intervals in advance to form multiple preset speed intervals, and multiple flow rates of refrigerant entering the throttling device 33 are set in advance to form multiple preset flow rates, and then the multiple preset speed intervals are made to correspond one by one to the multiple preset flow rates.

[0102] It should be noted that, for different preset speed ranges, the corresponding preset flow rates may be the same or different.

[0103] Table 2

[0104]

[0105] Exemplarily, as shown in Table 2, the number of capillaries 331 is two, the two capillaries 331 are respectively a first capillary and a second capillary, and the flow rate of the first capillary is greater than the flow rate of the second capillary. Different capillary tubes 331 conduction and different numbers of capillary tubes 331 conduction represent different flow rates of the refrigerant entering the throttling device 33.

[0106] At this time, multiple preset speed intervals B can be: B≥3000r / min, 1200r / min≤B<3000r / min and B<1200r / min. Multiple preset flow rates can be first capillary conduction and second capillary conduction. Moreover, when the preset speed interval B is B≥3000r / min, the corresponding preset flow rate is the first capillary conduction, when the preset speed interval B is 1200r / min≤B<3000r / min, the corresponding preset flow rate is the second capillary conduction, and when the preset speed interval B is B<1200r / min, the corresponding preset flow rate is the second capillary conduction.

[0107] By corresponding multiple preset speed ranges to multiple preset flow rates one by one, when the target speed range is determined, the first target flow rate of the refrigerant entering the throttling device 33 can be quickly obtained, so that the initial flow rate of the refrigerant entering the throttling device 33 can be quickly adjusted.

[0108] In addition, by setting the initial flow rate of the refrigerant entering the throttling device 33 according to the initial rotational speed of the compressor 31, the flow rate of the refrigerant entering the throttling device 33 and the evaporator 34 can be matched with the rotational speed of the compressor 31, thereby making the heat exchange between the refrigerant and the evaporator 34 more stable, and further preliminarily reducing the effect of the refrigerant flow rate on the temperature of the return air pipe 35, so as to preliminarily reduce the influence of the refrigerant flow rate on the load of the compressor 31.

[0109] On this basis, if the speed of the condensing fan 38 changes, the flow rate of the refrigerant entering the throttling device 33 is adjusted again according to the second temperature difference between the inlet temperature of the evaporator 34 and the second temperature of the outlet of the evaporator 34. The adjustment process of the flow rate of the refrigerant can be made more stable, thereby better ensuring the temperature of the return air pipe 35 and reducing the energy consumption of the refrigerator.

[0110] The initial rotation speed of the compressor 31 may be acquired by detecting the rotation speed of the compressor 31 using a rotation speed sensor.

[0111] The acquisition of the initial speed of the compressor 31 can also be achieved by acquiring the startup rate of the compressor 31. Specifically, the controller 6 executes the acquisition of the initial speed of the compressor 31 when it is started, and is configured to: determine the initial speed according to the corresponding relationship between the startup rate of the compressor 31 and the preset startup speed of the compressor 31.

[0112] That is, the initial speed of the compressor 31 may be set by the on-rate of the compressor 31 , and thus the initial speed of the compressor 31 may be acquired by acquiring the on-rate of the compressor 31 .

[0113] The startup rate of the compressor 31 can be calculated by running the compressor 31 at a set speed when the refrigerator is just powered on, and stably running a preset number of start-stop cycles after the temperature of the freezing chamber 112 and the temperature of the refrigerating chamber 111 reach the set temperature.

[0114] Exemplarily, when the refrigerator is powered on for the first time, the compressor 31 runs at 3900 r / min, and when the temperature of the freezer compartment 112 and the temperature of the refrigerator compartment 111 reach the set temperature, the compressor 31 stops; then, when the temperature of the refrigerator compartment 111 and / or the temperature of the freezer compartment 112 rises to a preset temperature that needs to be cooled, the compressor 31 is started again at a speed of 3900 r / min, and thereafter the compressor 31 is stably turned on and off for 3 cycles.

[0115] The ratio of the sum of the operating time of the compressor 31 in the three on-off cycles to the total time of the three on-off cycles is calculated, that is, the on-rate of the compressor 31. The operating time of the compressor 31 in each on-off cycle refers to the time that the compressor 31 is in the operating state in the on-off cycle, and the total time of the compressor 31 in the three on-off cycles refers to the sum of the time that the compressor 31 is in the operating state and the time that it is in the shutdown state in the three on-off cycles.

[0116] The corresponding relationship between the startup rate of the compressor 31 and the preset startup speed of the compressor 31 can be: when the startup rate is greater than 90%, the preset startup speed is 4200r / min, when the startup rate is 80-90%, the preset startup speed is 3900r / min, when the startup rate is 60-80%, the preset startup speed is 3000r / min, when the startup rate is 50-60%, the preset startup speed is 2400r / min, when the startup rate is 30-50%, the preset startup speed is 2000r / min. When the startup rate is less than 30%, the preset startup speed is 1200r / min.

[0117] In some embodiments, the controller 6 executes control of the flow regulating component 7 to increase the flow rate of the refrigerant, and is configured to: determine a second target flow rate according to the target speed range, the second target flow rate is one of multiple preset adjusted flow rates, the multiple preset speed ranges correspond one-to-one to the multiple preset adjusted flow rates, and the second target flow rate is greater than the first target flow rate; the flow regulating component 7 is used to adjust the flow rate of the refrigerant entering the throttling device 33 to the second target flow rate.

[0118] That is, a plurality of preset adjusted flow rates of the refrigerant entering the throttling device 33 are set in advance, and the plurality of preset adjusted flow rates are corresponded one by one to a plurality of preset speed intervals of the compressor 31, that is, one preset adjusted flow rate corresponds to one preset speed interval. The adjusted flow rate is the flow rate of the refrigerant entering the throttling device 33 after being increased on the basis of the preset flow rate.

[0119] Since a preset speed range corresponds to a preset flow rate, the preset speed range can be made to correspond to a preset adjusted flow rate based on the preset flow rate corresponding to the preset speed range.

[0120] In this way, when it is determined that the current second temperature difference is greater than the preset temperature difference, the adjusted flow rate of the refrigerant entering the throttling device 33, that is, the second target flow rate, can be quickly determined according to the initial speed of the compressor 31, so that the flow rate of the refrigerant entering the throttling device 33 can be adjusted in time to quickly adjust the temperature of the return air pipe 35.

[0121] Table 3

[0122]

[0123] Exemplarily, as shown in Table 3, the preset speed interval B and the preset speed are the same as those shown in Table 2. The preset temperature difference is 2°C. The preset speed is 1200 r / min, that is, when the initial speed of the compressor 31 is within the preset speed interval B≥3000 r / min and 1200 r / min≤B<3000 r / min, it is necessary to increase the flow rate of the refrigerant entering the throttling device 33, and when the initial speed of the compressor 31 is within the preset speed interval B<1200 r / min, it is not necessary to adjust the flow rate of the refrigerant entering the throttling device 33.

[0124] The preset adjusted flow rates are respectively the first capillary and the second capillary are simultaneously connected, the first capillary is connected, and the second capillary is connected. When the preset speed range B is B≥3000r / min, the corresponding preset flow rate is the first capillary is connected, and the corresponding preset adjusted flow rate is the first capillary and the second capillary are simultaneously connected. At this time, if the current second temperature difference is greater than 2°C, the flow rate of the refrigerant entering the throttling device 33 is adjusted from the first capillary being connected to the first capillary and the second capillary being connected simultaneously.

[0125] When the preset speed range B is 1200r / min≤B<3000r / min, the corresponding preset flow rate is the second capillary conduction, and the corresponding preset adjusted flow rate is the first capillary conduction. At this time, if the current second temperature difference is greater than 2°C, the flow rate of the refrigerant entering the throttling device 33 will be adjusted from the second capillary conduction to the first capillary conduction.

[0126] The embodiment of the present application also provides a refrigerator control method, such as Fig.10 As shown, the refrigerator control method includes:

[0127] S1: Acquire a current first temperature of the outlet of the first condenser 32 and a current ambient temperature outside the refrigerator, and calculate a current first temperature difference between the current first temperature and the current ambient temperature.

[0128] S2: adjusting the rotation speed of the condensing fan 38 according to the current first temperature difference.

[0129] Adjusting the rotation speed of the condensing fan 38 according to the current first temperature difference can ensure the condensation effect of the condensing fan 38, and can avoid to a certain extent the excessive content of gaseous refrigerant in the refrigerant at the outlet of the first condenser 32, thereby reducing the influence of the adjustment of the rotation speed of the condensing fan 38 on the temperature of the return air pipe 35, so as to avoid the high energy consumption of the refrigerator caused by the return air pipe 35 being too low.

[0130] Among them, Fig.11 As shown, adjusting the speed of the condensing fan 38 according to the current first temperature difference includes:

[0131] S21: Determine a target temperature difference interval where the current first temperature difference is located, where the target temperature difference interval is one of a plurality of preset temperature difference intervals;

[0132] S22: determining a target operating speed of the condensing fan 38 according to the target temperature difference interval, the target operating speed being one of a plurality of preset operating speeds, and the plurality of preset temperature difference intervals corresponding to the plurality of preset operating speeds one by one;

[0133] S23: Control the condensing fan 38 to operate at the target operating speed.

[0134] For example, the corresponding relationship between a plurality of preset temperature difference intervals and a plurality of preset operating speeds is shown in Table 1. Fig.12 As shown, the whole process of the refrigerator control method is:

[0135] Acquire the current first temperature of the outlet of the first condenser 32 and the current ambient temperature outside the refrigerator, and calculate the current first temperature difference between the current first temperature and the current ambient temperature;

[0136] Determine the target temperature difference range where the current first temperature difference is located;

[0137] If the target temperature difference interval is A≥15°C, the target operating speed of the condensing fan 38 determined according to the target temperature difference interval is 1140 r / min. At this time, the condensing fan 38 is controlled to operate at 1140 r / min;

[0138] If the target temperature difference interval is 10°C≤A<15°C, the target operating speed of the condensing fan 38 determined according to the target temperature difference interval is 1000r / min. At this time, the condensing fan 38 is controlled to operate at 1000r / min;

[0139] If the target temperature difference interval is 5°C≤A<10°C, the target operating speed of the condensing fan 38 determined according to the target temperature difference interval is 800r / min. At this time, the condensing fan 38 is controlled to operate at 800r / min;

[0140] If the target temperature difference interval is 0°C≤A<5°C, the target operating speed of the condensing fan 38 determined according to the target temperature difference interval is 0 r / min. At this time, the condensing fan 38 is controlled not to operate.

[0141] In some embodiments, in order to further ensure that the temperature of the return air pipe 35 is within a more appropriate range, after the speed of the condensing fan 38 is adjusted, the flow rate of the refrigerant entering the throttling device 33 can be adjusted according to the second temperature difference between the inlet temperature of the evaporator 34 and the second temperature of the outlet of the evaporator 34.

[0142] Specifically, Fig.13 As shown, the refrigerator control method also includes:

[0143] S3: acquiring the current inlet temperature of the evaporator 34 and the current second temperature of the outlet of the evaporator 34, and calculating the current second temperature difference between the current inlet temperature and the current second temperature;

[0144] S4: Determine whether the initial speed of the compressor 31 when it is started is greater than or equal to a preset speed;

[0145] S5: If the initial rotation speed is greater than or equal to the preset rotation speed, determine whether the current second temperature difference is greater than the preset temperature difference;

[0146] S6: If the current second temperature difference is greater than the preset temperature difference, the flow regulating component 7 is controlled to increase the flow of the refrigerant entering the throttling device 33 .

[0147] By judging whether the current second temperature difference is greater than the preset temperature difference, the heat exchange effect of the refrigerant in the evaporator 34 can be judged. Therefore, when the heat exchange effect is poor, the heat exchange effect of the refrigerant in the evaporator 34 can be improved by increasing the flow rate of the refrigerant entering the throttling device 33, thereby ensuring the temperature of the refrigerant after passing through the evaporator 34, and then ensuring the temperature of the return air pipe 35, so as to reduce the energy consumption of the refrigerator.

[0148] In addition, when judging whether the initial speed of the compressor 31 when starting is greater than or equal to the preset speed, if the initial speed of the compressor 31 is less than the preset speed, the flow rate of the refrigerant entering the throttling device 33 is not adjusted. When judging whether the current second temperature difference is greater than the preset temperature difference, if the current second temperature difference is less than or equal to the preset temperature difference, the flow rate of the refrigerant entering the throttling device 33 is not adjusted.

[0149] On this basis, in order to reduce the influence of the flow rate of the refrigerant entering the evaporator 34 on the temperature of the return air pipe 35, as shown in FIG. Fig.14 As shown, before obtaining the current inlet temperature of the evaporator 34 and the current second temperature of the outlet of the evaporator 34, the refrigerator control method further includes:

[0150] S10: Obtaining the initial speed of the compressor 31 when it is started;

[0151] S20: determining a target speed interval where the initial speed is located, the target speed interval being one of a plurality of preset speed intervals;

[0152] S30: determining a first target flow rate according to the target speed range, where the first target flow rate is one of a plurality of preset flow rates, and the plurality of preset speed ranges correspond one to one with the plurality of preset flow rates;

[0153] S40: The flow rate of the refrigerant entering the throttling device 33 is adjusted to a first target flow rate through the flow regulating component 7.

[0154] Exemplarily, the corresponding relationship between the plurality of preset speed intervals and the plurality of preset flow rates is shown in Table 2. Then, Fig.15 As shown, the refrigerator control method includes:

[0155] Obtaining the initial speed of the compressor 31 when it is started;

[0156] Determine the target speed range where the initial speed is located;

[0157] If the target speed interval is B≥3000r / min, the first target flow rate determined according to the target speed interval is that the first capillary is turned on, and at this time, the flow regulating component 7 is controlled to only turn on the first capillary;

[0158] If the target speed interval is 1200r / min≤B<3000r / min, the first target flow rate determined according to the target speed interval is that the second capillary is turned on, and at this time, the flow regulating component 7 is controlled to only turn on the second capillary;

[0159] If the target speed interval is B<1200r / min, the first target flow rate determined according to the target speed interval is that the second capillary is turned on, and at this time, the flow regulating component 7 is controlled to only turn on the second capillary.

[0160] In some embodiments, Fig.16 As shown, controlling the flow regulating assembly 7 to increase the flow of the refrigerant entering the throttling device 33 includes:

[0161] S61: determining a second target flow rate according to the target speed range, the second target flow rate being one of a plurality of preset adjusted flow rates, the plurality of preset speed ranges corresponding to the plurality of preset adjusted flow rates one by one, and the second target flow rate being greater than the first target flow rate;

[0162] S62: The flow rate of the refrigerant entering the throttling device 33 is adjusted to a second target flow rate through the flow regulating component 7.

[0163] For example, the corresponding relationship between the preset speed range and the preset adjusted flow rate is shown in Table 3. Fig.17 As shown, the whole process of the refrigerator control method is:

[0164] Acquire the current first temperature of the outlet of the first condenser 32 and the current ambient temperature outside the refrigerator, and calculate the current first temperature difference between the current first temperature and the current ambient temperature;

[0165] adjusting the speed of the condensing fan 38 according to the current first temperature difference;

[0166] Acquire the current inlet temperature of the evaporator 34 and the current second temperature of the outlet of the evaporator 34, and calculate the current second temperature difference between the current inlet temperature and the current second temperature;

[0167] Determine whether the initial speed of the compressor 31 when it is started is greater than or equal to 1200 r / min;

[0168] If the initial speed is less than 1200 r / min, the flow rate of the refrigerant entering the throttling device 33 is not adjusted;

[0169] If the initial speed is greater than or equal to 1200r / min, determine whether the current second temperature difference is greater than 2°C;

[0170] If the current second temperature difference is less than or equal to 2°C, the flow rate of the refrigerant entering the throttling device 33 is not adjusted;

[0171] If the current second temperature difference is greater than 2°C, the second target flow rate is determined according to the target speed range;

[0172] If the target speed range is B≥3000r / min, the second target flow rate is that the first capillary tube and the second capillary tube are connected at the same time. At this time, the flow regulating component 7 switches the flow rate of the refrigerant entering the throttling device 33 from the first capillary tube being connected to the first capillary tube and the second capillary tube being connected at the same time.

[0173] If the target speed range is 1200r / min≤B<3000r / min, the second target flow is the first capillary conduction. At this time, the flow regulating component 7 switches the flow of the refrigerant entering the throttling device 33 from the second capillary conduction to the first capillary conduction.

[0174] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the present application for which protection is claimed, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprise" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0175] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0176] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A refrigerator, characterized in that: include: A refrigeration system, comprising a compressor, a first condenser, a throttling device and an evaporator which are sequentially connected through a pipeline to form a circulation loop of a refrigerant; The refrigeration system further comprises a condensing fan, wherein the condensing fan is used to blow air to the first condenser; A first temperature sensor is provided at an outlet of the first condenser and is used to detect a first temperature at the outlet of the first condenser; A second temperature sensor is disposed outside the refrigerator and is used to detect the ambient temperature outside the refrigerator; A controller is connected to the condensing fan, the first temperature sensor and the second temperature sensor, and is configured as follows: Acquire a current first temperature of an outlet of the first condenser and a current ambient temperature outside the refrigerator, and calculate a current first temperature difference between the current first temperature and the current ambient temperature; The rotation speed of the condensing fan is adjusted according to the current first temperature difference.

2. The refrigerator according to claim 1, characterized in that: Also includes: A flow regulating component, the flow regulating component is connected in series between the throttling device and the first condenser, and is used to regulate the flow of the refrigerant entering the throttling device; a third temperature sensor, disposed at the inlet of the evaporator, for detecting the inlet temperature of the evaporator; a fourth temperature sensor, disposed at the outlet of the evaporator, for detecting a second temperature at the outlet of the evaporator; The controller is connected to the flow regulating component, the third temperature sensor and the fourth temperature sensor, and is further configured as follows: Acquire a current inlet temperature of the evaporator and a current second temperature of an outlet of the evaporator, and calculate a current second temperature difference between the current inlet temperature and the current second temperature; Determining whether the initial speed of the compressor when it is started is greater than or equal to a preset speed; If the initial rotation speed is greater than or equal to the preset rotation speed, determining whether the current second temperature difference is greater than the preset temperature difference; If the current second temperature difference is greater than the preset temperature difference, the flow regulating component is controlled to increase the flow of the refrigerant entering the throttling device.

3. The refrigerator according to claim 2, characterized in that: Before the controller executes the step of acquiring the current inlet temperature of the evaporator and the current second temperature of the outlet of the evaporator, the controller is further configured to: Acquiring the initial speed of the compressor when it is started; Determine a target speed interval in which the initial speed is located, wherein the target speed interval is one of a plurality of preset speed intervals; Determine a first target flow rate according to the target speed range, wherein the first target flow rate is one of a plurality of preset flow rates, and the plurality of preset speed ranges correspond to the plurality of preset flow rates one by one; The flow rate of the refrigerant entering the throttling device is adjusted to the first target flow rate by the flow regulating component.

4. The refrigerator according to claim 3, characterized in that: The controller executes the control of the flow regulating component to increase the flow of the refrigerant entering the throttling device, and is configured as follows: Determine a second target flow rate according to the target speed range, the second target flow rate is one of a plurality of preset adjusted flow rates, the plurality of preset speed ranges correspond to the plurality of preset adjusted flow rates one by one, and the second target flow rate is greater than the first target flow rate; The flow rate of the refrigerant entering the throttling device is adjusted to the second target flow rate by the flow regulating component.

5. The refrigerator according to any one of claims 1 to 4, characterized in that: The controller performs the step of adjusting the rotation speed of the condensing fan according to the current first temperature difference, and is configured as follows: Determine a target temperature difference interval where the current first temperature difference is located, wherein the target temperature difference interval is one of a plurality of preset temperature difference intervals; Determining a target operating speed of the condensing fan according to the target temperature difference interval, wherein the target operating speed is one of a plurality of preset operating speeds, and the plurality of preset temperature difference intervals correspond one to one to the plurality of preset operating speeds; The condensing fan is controlled to operate at the target operating speed.

6. The refrigerator according to any one of claims 2 to 4, characterized in that: The throttling device comprises a plurality of capillaries, and the outlets of the plurality of capillaries are connected to the inlet of the evaporator; The flow regulating component comprises an electric switching valve, which is connected to the inlets of the plurality of capillaries and is used to block or conduct at least one of the capillaries; The flow rates of the capillaries are different, and the electric switching valve adjusts the flow rate of the refrigerant entering the throttling device by connecting different capillaries or connecting different numbers of capillaries; Alternatively, the flow rates of the capillaries are the same, and the electric switching valve adjusts the flow rate of the refrigerant entering the throttling device by connecting different numbers of capillaries.

7. The refrigerator according to claim 3, characterized in that: After the controller performs the step of determining whether the current second temperature difference is greater than a preset temperature difference, the controller is further configured to: if the current second temperature difference is less than or equal to the preset temperature difference, maintain the flow rate of the refrigerant entering the throttling device at the first target flow rate; And / or, the controller executes the step of obtaining the initial speed when the compressor is started, and is configured to: determine the initial speed according to a corresponding relationship between the start-up rate of the compressor and the preset starting speed of the compressor.

8. A refrigerator control method, characterized in that: include: Acquire a current first temperature of an outlet of a first condenser and a current ambient temperature outside the refrigerator, and calculate a current first temperature difference between the current first temperature and the current ambient temperature; The rotation speed of the condensing fan is adjusted according to the current first temperature difference.

9. The refrigerator control method according to claim 8, characterized in that: Also includes: Acquire a current inlet temperature of the evaporator and a current second temperature of the outlet of the evaporator, and calculate a current second temperature difference between the current inlet temperature and the current second temperature; Determine whether the initial speed of the compressor when it is started is greater than or equal to the preset speed; If the initial rotation speed is greater than or equal to the preset rotation speed, determining whether the current second temperature difference is greater than the preset temperature difference; If the current second temperature difference is greater than the preset temperature difference, the flow regulating component is controlled to increase the flow of the refrigerant entering the throttling device.

10. The refrigerator control method according to claim 9, characterized in that: Before obtaining the current inlet temperature of the evaporator and the current second temperature of the outlet of the evaporator, the method further includes: Acquiring the initial speed of the compressor when it is started; Determine a target speed interval in which the initial speed is located, wherein the target speed interval is one of a plurality of preset speed intervals; Determine a first target flow rate according to the target speed range, wherein the first target flow rate is one of a plurality of preset flow rates, and the plurality of preset speed ranges correspond to the plurality of preset flow rates one by one; The flow rate of the refrigerant entering the throttling device is adjusted to the first target flow rate by the flow regulating component.

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