Refrigerator

Abstract

The embodiment of the utility model belongs to the household appliance technology, and provides a refrigerator. When the refrigerating system 103 is in a rapid refrigerating mode, a refrigerant flowing out of the condenser 32 flows to the second evaporator 34 through the fourth throttling device 40 and the first throttling device 39 which are connected in parallel, so that the flow of the circulating refrigerant is large, the refrigerating effect of the second evaporator 34 is improved, the compressor is controlled to operate at a high rotating speed, and the refrigerating efficiency is improved. The purpose of quickly refrigerating the refrigerating chamber can be achieved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of household appliance technology, and more specifically, to a refrigerator. Background Art

[0002] In order to meet the user's demand for rapid cooling, most refrigerators are equipped with a rapid cooling function, which is usually used to quickly cool the refrigerator compartment.

[0003] At present, in order to achieve the rapid cooling function, the speed of the refrigerator compressor can be increased to provide more cooling capacity, thereby achieving rapid cooling. However, in special cases such as when the user puts a large amount of room temperature food in at one time or opens the door for too long, even if the compressor speed is greater than or equal to the maximum speed, it cannot meet the current cooling demand, resulting in poor cooling effect and affecting the user experience. Utility Model Content

[0004] The embodiment of the present application provides a refrigerator that can be used to achieve rapid refrigeration and improve refrigeration effect.

[0005] In a first aspect, an embodiment of the present application provides a refrigerator, comprising:

[0006] The cabinet includes a refrigerator and a freezer;

[0007] A refrigeration system is arranged in the box, and the refrigeration system includes:

[0008] compressor;

[0009] Condenser;

[0010] a first evaporator capable of refrigerating the freezing chamber;

[0011] a second evaporator capable of refrigerating the refrigerating chamber;

[0012] The first electric valve;

[0013] a second electric valve; and

[0014] The third electric valve;

[0015] Wherein, the exhaust port of the compressor is communicated with the first inlet of the first electric valve, the condenser is communicated with the first outlet of the first electric valve, the second outlet of the first electric valve is communicated with the third inlet of the third electric valve through a defrost heating pipe zigzagly arranged at the bottom of the first evaporator; the fifth outlet of the third electric valve is communicated with the second evaporator through a first throttling device, and the sixth outlet of the third electric valve is communicated with the outlet of the condenser; the condenser is communicated with the second inlet of the second electric valve, the third outlet of the second electric valve is communicated with the first evaporator, and the fourth outlet of the second electric valve is communicated with the second evaporator; the outlet of the first evaporator and the outlet of the second evaporator are communicated with the air inlet of the compressor;

[0016] When the refrigeration system is in the rapid cooling mode, the compressor operates at a first speed; the fourth outlet of the second electric valve is opened; the first outlet of the first electric valve is opened; the third inlet of the third electric valve is closed, and its first outlet and second outlet are opened; wherein the first speed is less than the maximum speed of the compressor.

[0017] In this embodiment, when the refrigeration system is in the rapid cooling mode, the refrigerant flowing out of the condenser flows to the second evaporator through the fourth throttling device and the first throttling device connected in parallel, so that the circulating refrigerant flow rate is larger, thereby improving the refrigeration effect of the second evaporator, and controlling the compressor to run at a higher speed, thereby achieving the purpose of rapid cooling of the cold storage room.

[0018] In some embodiments of the present application, when there is a demand for cooling the freezer compartment, the third outlet of the second electric valve is opened, so that the first evaporator cools the freezer compartment.

[0019] In this embodiment, in the rapid cooling mode, if there is a cooling demand in the freezer compartment, the passage between the evaporator and the condenser of the freezer compartment can be connected through the second electric valve to meet the cooling demand of the freezer compartment.

[0020] In some embodiments of the present application, a second throttling device is provided in the passage between the sixth outlet of the third electric valve and the outlet of the condenser.

[0021] In this embodiment, in the rapid cooling mode, a second throttling device is arranged in the passage between the sixth outlet of the third electric valve and the outlet of the condenser, so that the refrigerant flowing out from the condenser outlet is throttled and reduced in pressure by the second throttling device, and then passes through the sixth outlet of the third electric valve and the fifth outlet of the third electric valve in sequence, and then flows to the first throttling device for throttling and reducing in pressure again, and then flows to the second evaporator, so that the refrigerant can reduce the pressure more smoothly in this passage. The smooth pressure drop can reduce the flash evaporation of the refrigerant, so that more refrigerant can enter the second evaporator in liquid form, thereby improving the heat exchange efficiency of the second evaporator.

[0022] In some embodiments of the present application, when the refrigeration system is in the defrost mode, the third outlet and the fourth outlet of the second electric valve are closed, the second outlet of the first electric valve is opened, and the sixth outlet of the third electric valve is opened.

[0023] In this embodiment, when the evaporator of the freezer compartment needs to be defrosted, the passage between the compressor and the defrost heating tube arranged at the bottom of the evaporator can be connected, and the evaporator can be defrosted by utilizing the condensation heat of the defrost heating tube, while the refrigerator compartment can be cooled at the same time, thereby avoiding the temperature of the refrigerator compartment being affected by defrosting.

[0024] In some embodiments of the present application, a fourth throttling device is provided between the fourth outlet of the second electric valve and the second evaporator, and a third throttling device is provided between the third outlet of the second electric valve and the first evaporator.

[0025] In this embodiment, a throttling device may be provided in the pipelines at the inlets of the first evaporator and the second evaporator to achieve throttling and pressure reduction of the refrigerant flowing therethrough.

[0026] In some embodiments of the present application, the flow rate of the third throttling device is greater than the flow rate of the fourth throttling device.

[0027] In this embodiment, a throttling device with a larger flow rate is provided between the first evaporator and the condenser so that the refrigeration system has sufficient refrigerant flow rate to cool the freezer compartment. A throttling device with a smaller flow rate is provided between the second evaporator and the condenser so that too much refrigerant can be prevented from flowing into the second evaporator, resulting in overcooling or wasting energy.

[0028] In some embodiments of the present application, the third throttling device and the fourth throttling device are capillaries of different lengths;

[0029] The length of the third throttling device is smaller than the length of the fourth throttling device.

[0030] In this embodiment, the throttling device can be set to different flow rates by setting different lengths of the capillary tubes.

[0031] In some embodiments of the present application, the refrigerator further comprises: a controller electrically connected to the refrigeration system, wherein the controller is configured to:

[0032] After the fourth outlet of the second electric valve is opened, the first outlet of the first electric valve is opened, and the fifth outlet and the sixth outlet of the third electric valve are opened, controlling the compressor to operate at a second speed;

[0033] After the compressor runs at the second speed for a preset period of time, the compressor is controlled to run at the first speed until the refrigeration system exits the rapid refrigeration mode, and the second speed is less than the first speed.

[0034] In this embodiment, in the rapid cooling mode, by controlling the compressor to run at a lower speed for a period of time when starting and then running at a higher speed, the mechanical impact and wear of the compressor when starting can be reduced, and then the speed can be transitioned to a higher speed in a relatively stable state, thereby reducing the wear of mechanical parts and protecting the compressor.

[0035] In some embodiments of the present application, the controller is further configured to:

[0036] When the refrigeration system is in a refrigeration mode, the fifth outlet and the sixth outlet of the third electric valve are controlled to be closed, the first outlet of the first electric valve is controlled to be opened, and the third outlet of the second electric valve is controlled to be opened, so as to refrigerate the freezing chamber;

[0037] After the freezing chamber is refrigerated, controlling the fourth outlet of the second electric valve to open to refrigerate the refrigerating chamber;

[0038] After the refrigeration of the refrigerating chamber is completed, the compressor is controlled to stop.

[0039] In this embodiment, in normal refrigeration mode, since frozen food is more sensitive to temperature changes, the freezer compartment can be refrigerated first and then the refrigerator compartment. In this way, the temperature of the freezer compartment can be prevented from rising, causing partial thawing of the food in the freezer compartment and affecting its quality.

[0040] In some embodiments of the present application, when the refrigeration system is in refrigeration mode, the fifth outlet and the sixth outlet of the third electric valve are closed, at least one of the third outlet or the fourth outlet of the second electric valve is opened, and the first outlet of the first electric valve is opened.

[0041] In this embodiment, in normal cooling mode, the refrigerating chamber and the freezing chamber can be cooled at the same time, and while the temperature of the freezing chamber is increased, the temperature of the refrigerating chamber can be ensured not to be too high to avoid affecting the food stored in the refrigerating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0043] Figure 1 is a schematic diagram of a refrigerator according to some embodiments;

[0044] Figure 2 is a structural schematic diagram of a refrigeration system according to some embodiments;

[0045] Figure 3 is a schematic diagram of electrical connection between a controller and a compressor, a first electric valve, a second electric valve, and a third electric valve according to some embodiments;

[0046] Figure 4 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system according to some embodiments refrigerates the refrigerating chamber in the refrigeration mode;

[0047] Figure 5 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system according to some embodiments refrigerates the freezing chamber in the refrigeration mode;

[0048] Figure 6 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system according to some embodiments cools the refrigerator compartment and the freezer compartment simultaneously in the refrigeration mode;

[0049] Figure 7 is a schematic diagram of the flow direction of the refrigerant in the defrost mode of the refrigeration system according to some embodiments;

[0050] Figure 8 is a schematic diagram of the flow direction of the refrigerant in the refrigeration system in the rapid refrigeration mode according to some embodiments;

[0051] Fig. 9 A schematic diagram of the flow direction of a refrigerant when a refrigeration system according to some embodiments is in a rapid refrigeration mode and refrigerates a freezing chamber at the same time;

[0052] Fig.10 Another structural schematic diagram of a refrigeration system provided according to some embodiments.

[0053] Description of reference numerals:

[0054] 10-refrigerator; 101-box;

[0055] 102-door body; 103-refrigeration system;

[0056] 31- compressor; 32- condenser;

[0057] 33-first evaporator; 34-second evaporator;

[0058] 35-first electric valve; 36-defrosting heating pipe;

[0059] 37-second electric valve; 38-third electric valve;

[0060] 39-first throttling device; 40-fourth throttling device;

[0061] 41-third throttling device; 42-second throttling device;

[0062] y1-the exhaust port of the compressor 31; y2-the air inlet of the compressor 31;

[0063] a1-a first inlet of the first electric valve 35; a2-a first outlet a2 of the first electric valve 35;

[0064] a3 - a second outlet of the first electric valve 35; b1 - a second inlet of the second electric valve 37;

[0065] b2-the third outlet of the second electric valve 37; b3-the fourth outlet of the second electric valve 37;

[0066] c1-a third inlet of the third electric valve 38; c2-a fifth outlet of the third electric valve 38;

[0067] c3—the sixth outlet of the third electric valve 38 . DETAILED DESCRIPTION

[0068] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0069] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0070] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0071] At present, in order to achieve the rapid cooling function, the speed of the refrigerator compressor can be increased to provide more cooling capacity, thereby achieving rapid cooling. However, in special cases such as when the user puts a large amount of room temperature food in at one time or opens the door for too long, even if the compressor reaches the maximum speed, it cannot meet the current cooling demand, resulting in poor cooling effect and affecting the user experience. Moreover, by controlling the compressor to run at a high speed, the compressor will be burdened and energy consumption will increase.

[0072] Therefore, the present application provides a refrigerator which, in the rapid cooling mode, opens two branches connected in parallel between the evaporator and the condenser of the refrigerator compartment, wherein a throttling device is provided on each branch, so that when the refrigerant flows from the condenser to the evaporator of the refrigerator compartment, the refrigerant flow rate is increased relative to the refrigerant flow rate when the refrigerant passes through a single branch, thereby improving the refrigeration effect of the evaporator and achieving the purpose of rapid cooling of the refrigerator compartment.

[0073] It should be noted that in some embodiments, the rapid cooling mode refers to rapid cooling of the refrigerator compartment. Compared with the cooling mode, the rapid cooling mode can make the temperature of the refrigerator compartment less than or equal to the required cooling temperature in a shorter time. In some embodiments, when a user needs a large amount of cold drinks in summer, the refrigerator's refrigeration system can be triggered to enter the rapid cooling mode.

[0074] In some embodiments, the user can trigger this mode in the display panel of the refrigerator, or trigger the mode through a corresponding application in a terminal device that controls the refrigerator, so that when the refrigerator receives the corresponding refrigeration, it controls the refrigeration system to enter the fast refrigeration mode to meet the user's fast refrigeration needs.

[0075] The following embodiments of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments may be combined with each other or exist independently, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0076] First, the structure of a refrigerator provided in some embodiments of the present application is described.

[0077] In some embodiments, Figure 1 is a schematic diagram of a refrigerator according to some embodiments, such as Figure 1 As shown, the refrigerator 10 includes a cabinet 101 .

[0078] The refrigerator 10 further includes a door body 102 , and the door body 102 is connected to the cabinet 101 .

[0079] The refrigerator 10 further includes a storage chamber, which is disposed in the housing 101 .

[0080] In some embodiments, the storage compartment includes a refrigerator and a freezer, etc.

[0081] In some embodiments, the refrigerator 10 further includes a refrigeration system 103 disposed in the housing 101. For example, Figure 2 is a structural schematic diagram of a refrigeration system according to some embodiments, such as Figure 2 As shown, the refrigeration system 103 includes a compressor 31, and the compressor 31 is configured to provide power for refrigeration of the refrigerator 10. The compressor 31 has an exhaust port y1 and an intake port y2.

[0082] The refrigeration system 103 further includes a condenser 32 configured to dissipate heat for the refrigerant from the compressor 31 .

[0083] The refrigeration system 103 further includes a first evaporator 33 , which is configured to provide cooling for the freezing chamber.

[0084] The refrigeration system 103 further includes a second evaporator 34, and the second evaporator 34 is configured to provide cooling for the refrigerating chamber.

[0085] The refrigeration system 103 further includes a first electric valve 35 . The first electric valve 35 has an inlet and two outlets, namely a first inlet a1 , a first outlet a2 , and a second outlet a3 .

[0086] The refrigeration system 103 further includes a second electric valve 37 . The second electric valve 37 has an inlet and two outlets, namely a second inlet b1 , a third outlet b2 , and a fourth outlet b3 .

[0087] The refrigeration system 103 further includes a third electric valve 38 . The third electric valve 38 includes an inlet and two outlets, namely a third inlet c1 , a fifth outlet c2 , and a sixth outlet c3 .

[0088] In some embodiments

[0089] In some embodiments, the refrigeration system 103 further includes a defrosting heating pipe 36 . The defrosting heating pipe 36 can be used to melt the frost layer on the first evaporator 33 .

[0090] The exhaust port y1 of the compressor 31 is connected to the first inlet a1 of the first electric valve 35, the condenser 32 is connected to the first outlet a2 of the first electric valve 35, and the second outlet a3 of the first electric valve 35 is connected to the third inlet c1 of the third electric valve 38 through the defrosting heating pipe 36 zigzagly arranged at the bottom of the first evaporator 33. The fifth outlet c2 of the third electric valve 38 is connected to the second evaporator 34 through the first throttling device 39, and the sixth outlet c3 of the third electric valve 38 is connected to the outlet of the condenser 32. The condenser 32 is connected to the second inlet b1 of the second electric valve 37, the third outlet b2 of the second electric valve 37 is connected to the first evaporator 33, and the fourth outlet b3 of the second electric valve 37 is connected to the second evaporator 34. The outlet of the first evaporator 33 and the outlet of the second evaporator 34 are connected to the air inlet y2 of the compressor 31.

[0091] In some embodiments, the refrigerator 10 also includes a controller 104 , which is electrically connected to the refrigeration system 103 . For example, the controller 104 can be electrically connected to the compressor 31 , the first electric valve 35 , the second electric valve 37 and the third electric valve 38 in the refrigeration system 103 . Figure 3 Schematic diagram of electrical connections between a controller and a compressor, a first electric valve, a second electric valve, and a third electric valve, respectively, according to some embodiments.

[0092] Exemplarily, the controller 104 may be a microcontroller unit (MCU).

[0093] In some embodiments, the refrigeration system 103 further includes a third throttling device 41 , which is disposed between the third outlet b2 of the second electric valve 37 and the first evaporator 33 .

[0094] The refrigeration system 103 further includes a fourth throttling device 40, which is disposed between the fourth outlet b3 of the second electric valve 37 and the second evaporator 34. Thus, throttling and pressure reduction can be achieved through the third throttling device 41 and the fourth throttling device 40.

[0095] In some embodiments, the flow rate of the third throttling device 41 may be greater than the flow rate of the fourth throttling device 40. A throttling device with a larger flow rate (such as the third throttling device 41) is provided between the first evaporator 33 and the condenser 32 so that the refrigeration system 103 has sufficient refrigerant flow rate to refrigerate the freezer compartment. A throttling device with a smaller flow rate (such as the fourth throttling device 40) is provided between the second evaporator 34 and the condenser 32 to prevent excessive refrigerant from flowing into the second evaporator 34, resulting in overcooling or wasting energy.

[0096] In some embodiments, the third throttling device 41 and the fourth throttling device 40 may be capillaries of different lengths, wherein the length of the third throttling device 41 is smaller than the length of the fourth throttling device 40 , so that the flow rate of the third throttling device 41 may be greater than the flow rate of the fourth throttling device 40 .

[0097] In some embodiments, when the refrigeration system 103 is in the refrigeration mode, the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are closed, at least one of the third outlet b2 or the fourth outlet b3 of the second electric valve 37 is opened, and the first outlet a2 of the first electric valve 35 is opened.

[0098] It can be understood that at this time, the second inlet b1 of the second electric valve 37 is opened, the first inlet a1 of the first electric valve 35 is opened, and the second outlet a3 of the first electric valve 35 is closed.

[0099] In some embodiments, when the third outlet b2 of the second electric valve 37 is opened, the refrigeration system 103 refrigerates the freezer compartment. When the fourth outlet b3 of the second electric valve 37 is opened, the refrigeration system 103 refrigerates the refrigerator compartment. When both the third outlet b2 and the fourth outlet b3 of the second electric valve 37 are opened, the refrigeration system 103 refrigerates the refrigerator compartment and the freezer compartment at the same time.

[0100] In some embodiments, when the refrigeration system 103 is in the refrigeration mode, if there is a refrigeration demand in the refrigerating chamber, the fourth outlet b3 of the second electric valve 37 is opened.

[0101] Figure 4 FIG. 4 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system according to some embodiments refrigerates the refrigerating chamber in the refrigeration mode. Figure 4 As shown, the low-temperature and low-pressure refrigerant is sucked into the air inlet y2 of the compressor 31, and is compressed into a high-temperature and high-pressure gas-phase refrigerant in the cylinder of the compressor 31, and then enters the condenser 32 through the exhaust port y1. The high-temperature and high-pressure gas-phase refrigerant dissipates heat through the condenser 32, and the temperature continues to drop. It is cooled to a saturated gas-phase refrigerant at normal temperature and high pressure and further cooled to a saturated liquid-phase refrigerant. The liquid-phase refrigerant flowing out of the condenser 32 enters the fourth throttling device 40 through the second electric valve 37 for throttling and pressure reduction to become a gas-liquid two-phase refrigerant at normal temperature and low pressure (i.e., a two-phase mixture of gas-phase refrigerant and liquid-phase refrigerant), and then enters the second evaporator 34 to begin to absorb heat for vaporization, which not only reduces the temperature of the second evaporator 34 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. Then, the refrigerant flowing out of the second evaporator 34 enters the compressor 31 along the pipeline to complete the refrigeration cycle.

[0102] In some embodiments, if there is a refrigeration demand in the freezing chamber, the third outlet b2 of the second electric valve 37 is opened.

[0103] Figure 5 FIG. 4 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system according to some embodiments refrigerates the freezer compartment in the refrigeration mode. Figure 5 As shown, the low-temperature and low-pressure gas-phase refrigerant is sucked into the air inlet y2 of the compressor 31, and is compressed into the high-temperature and high-pressure gas-phase refrigerant in the cylinder of the compressor 31, and then enters the condenser 32 through the exhaust port y1. The high-temperature and high-pressure gas-phase refrigerant dissipates heat through the condenser 32, and the temperature continues to drop. It is cooled to a saturated gas-phase refrigerant at normal temperature and high pressure and further cooled to a saturated liquid-phase refrigerant. The refrigerant flowing out of the condenser 32 enters the third throttling device 41 through the second electric valve 37 for throttling and pressure reduction to become a gas-liquid two-phase refrigerant at normal temperature and low pressure, and then enters the first evaporator 33 to begin to absorb heat for vaporization, which not only reduces the temperature of the first evaporator 33 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. Then, the refrigerant flowing out of the first evaporator 33 enters the compressor 31 along the pipeline to complete the refrigeration cycle.

[0104] In some embodiments, if the refrigeration system 103 cools the freezing chamber and the refrigerating chamber at the same time, the third outlet b2 and the fourth outlet b3 of the second electric valve 37 are both opened.

[0105] Figure 6 FIG. 4 is a schematic diagram of the flow direction of the refrigerant when the refrigeration system according to some embodiments refrigerates the refrigerator compartment and the freezer compartment simultaneously in the refrigeration mode. Figure 6 As shown, the low-temperature and low-pressure gas-phase refrigerant is sucked into the air inlet y2 of the compressor 31, and is compressed into the high-temperature and high-pressure gas-phase refrigerant in the cylinder of the compressor 31, and then enters the condenser 32 through the exhaust port y1. The high-temperature and high-pressure gas-phase refrigerant dissipates heat through the condenser 32, and the temperature continues to drop. It is cooled to a saturated gas-phase refrigerant at normal temperature and high pressure and further cooled to a saturated liquid-phase refrigerant. The refrigerant flowing out of the condenser 32 enters the third throttling device 41 through the second electric valve 37 for throttling and pressure reduction to become a gas-liquid two-phase refrigerant at normal temperature and low pressure, and then enters the first evaporator 33 to begin to absorb heat for vaporization, which not only reduces the temperature of the first evaporator 33 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. Then, the refrigerant flowing out of the first evaporator 33 enters the compressor 31 along the pipeline. At the same time, the refrigerant flowing out of the condenser 32 enters the fourth throttling device 40 through the second electric valve 37 for throttling and pressure reduction to become a gas-liquid two-phase refrigerant at room temperature and low pressure, and then enters the second evaporator 34 to begin to absorb heat and vaporize, which not only reduces the temperature of the second evaporator 34 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. Then, the refrigerant flowing out of the second evaporator 34 enters the compressor 31 along the pipeline to complete the refrigeration cycle.

[0106] In some embodiments, when the refrigeration system 103 is in the refrigeration mode, the controller can control the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 to be closed, the first outlet a2 of the first electric valve 35 to be opened, and the third outlet b2 of the second electric valve 37 to be opened (the fourth outlet b3 is closed at this time) to refrigerate the freezing chamber. After the refrigeration of the freezing chamber is completed, the controller can control the fourth outlet b3 of the second electric valve 37 to be opened, and control the third outlet b2 to be closed to refrigerate the refrigerator. After the refrigeration of the refrigerator is completed, the compressor 31 can be controlled to stop, so that the refrigeration system 103 exits the refrigeration mode.

[0107] Since frozen foods are more sensitive to temperature changes, the freezer compartment can be refrigerated first and then the refrigerator compartment during refrigeration. This can prevent the temperature in the freezer compartment from rising, causing partial thawing of the food in the freezer compartment and affecting its quality.

[0108] In some embodiments Figure 7 FIG. 1 is a schematic diagram of the flow direction of the refrigerant in the refrigeration system in the defrost mode according to some embodiments, as shown in FIG. Figure 7 As shown, for example, when the refrigeration system 103 is in the defrosting mode, the low-temperature and low-pressure gas-phase refrigerant is sucked into the compressor 31, compressed into the high-temperature and high-pressure gas-phase refrigerant in the cylinder of the compressor 31, and then discharged to the defrosting heating pipe 36. The high-temperature and high-pressure gas-phase refrigerant enters the defrosting heating pipe 36 for condensation to generate heat, and the frost on the surface of the first evaporator 33 can be melted based on the heat. Then, it enters the first throttling device 39 through the fifth outlet c2 of the third electric valve 38 for throttling and pressure reduction to become a gas-liquid two-phase refrigerant at normal temperature and low pressure, and enters the second evaporator 34, so that the liquid refrigerant in the gas-liquid two-phase refrigerant is evaporated to form a gas-phase refrigerant, reducing the temperature of the second evaporator 34 and its surroundings. At this time, the refrigeration room can be cooled.

[0109] It should be noted that Figures 4 to 7 The arrows in the diagram indicate the direction of refrigerant flow.

[0110] In some embodiments, when the refrigeration system 103 is in the rapid cooling mode, the compressor 31 operates at a first speed, the fourth outlet b3 of the second electric valve 37 is opened, the first outlet a2 of the first electric valve 35 is opened, the third inlet c1 of the third electric valve 38 is closed, and the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are opened.

[0111] Figure 8 FIG. 4 is a schematic diagram of the flow direction of the refrigerant in the refrigeration system in the rapid refrigeration mode according to some embodiments. Figure 8As shown, at this time, the refrigerant flowing out of the condenser 32 passes through the sixth outlet c3 of the third electric valve 38, the fifth outlet c2 of the third electric valve 38 and the first throttling device 39 in sequence, and then flows to the second evaporator 34. At the same time, the refrigerant flowing out of the condenser 32 also passes through the fourth outlet b3 of the second electric valve 37 and the fourth throttling device 40, and then flows to the second evaporator 34, thereby realizing refrigeration of the refrigerating chamber, and then the refrigerant flowing out of the second evaporator 34 enters the compressor 31 along the pipeline to complete the refrigeration cycle.

[0112] Here, the first speed is less than the maximum speed of the compressor 31. For example, the maximum speed of the compressor 31 is 4500 rpm / min (revolutions / minute), and the first speed may be 4000 rpm / min or 3900 rpm / min, which is a speed less than the maximum speed. When the refrigerant flow between the condenser 32 and the second evaporator 34 increases, the compressor 31 may not operate at the maximum speed, and the rapid refrigeration demand of the refrigerating chamber may be met, thereby reducing the workload of the compressor 31 and reducing energy consumption.

[0113] In this embodiment, when the refrigeration system 103 is in the rapid cooling mode, the refrigerant flowing out of the condenser 32 flows to the second evaporator 34 through the fourth throttling device 40 and the first throttling device 39 connected in parallel, so that the circulating refrigerant flow rate is larger, thereby improving the refrigeration effect of the second evaporator 34, and controlling the compressor to run at a higher speed, so as to achieve the purpose of rapid cooling of the cold storage room. Fig. 9 FIG. 1 is a schematic diagram of the flow direction of the refrigerant in the refrigeration system according to some embodiments, in which the refrigeration system is in a rapid refrigeration mode and refrigerates the freezing chamber at the same time. Fig. 9 In some embodiments, when the refrigeration system 103 is in the rapid cooling mode, if there is a cooling demand in the freezer compartment, the controller 104 can control the third outlet b2 of the second electric valve 37 to open, so that the refrigerant flowing out of the condenser 32 can flow to the first evaporator 33 at the same time, so that the first evaporator 33 cools the freezer compartment to meet the cooling demand of the freezer compartment.

[0114] In some embodiments, the refrigeration system 103 further includes a fourth throttling device 40 , which is disposed in a passage between a sixth outlet c3 of the third electric valve 38 and an outlet of the condenser 32 .

[0115] Fig.10 is another structural schematic diagram of a refrigeration system according to some embodiments, such as Fig.10As shown, in the rapid cooling mode, a second throttling device 42 is arranged in the passage between the sixth outlet c3 of the third electric valve 38 and the outlet of the condenser 32, so that the refrigerant flowing out from the outlet of the condenser 32 is throttled and reduced in pressure by the second throttling device 42, and then passes through the sixth outlet c3 of the third electric valve 38 and the fifth outlet c2 of the third electric valve 38 in sequence, and then flows to the first throttling device 39 for throttling and reducing in pressure again, and then flows to the second evaporator 34, so that the refrigerant can reduce the pressure more smoothly in this passage. The smooth pressure drop can reduce the flash evaporation phenomenon of the refrigerant (that is, part of the liquid refrigerant turns into gas), so that more refrigerant enters the second evaporator 34 in liquid form, thereby improving the heat exchange efficiency of the second evaporator 34.

[0116] In some embodiments, after the fourth outlet b3 of the second electric valve 37 is opened, the first outlet a2 of the first electric valve 35 is opened, and the fifth outlet c2 and the sixth outlet c3 of the third electric valve 38 are opened, the controller 104 can control the compressor 31 to operate at the second speed. After the compressor 31 operates at the second speed for a preset time, the compressor 31 is controlled to operate at the first speed until the refrigeration system 103 exits the rapid cooling mode.

[0117] Here, the second rotation speed is less than the first rotation speed. For example, the second rotation speed may be 2100 rpm / min, and the preset time may be 5 minutes.

[0118] By controlling the compressor 31 to run at a lower speed for a period of time when starting it and then running it at a higher speed, the mechanical impact and wear of the compressor 31 when starting it can be reduced. Then, the compressor 31 can be transitioned to a higher speed in a relatively stable state, thereby reducing the wear of mechanical parts and protecting the compressor 31.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0120] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

[0121] In this application, "multiple" means two or more. The first, second, etc. descriptions that appear in the embodiments of this application are only used for illustration and distinction of the described objects. There is no order, nor does it represent a special limitation on the number of devices in the embodiments of this application, and cannot constitute any limitation on the embodiments of this application. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and do not represent the difference in size, priority, or importance of the two thresholds.

[0122] In this application, "exemplary", "in some embodiments", "in other embodiments", etc. are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0123] In this application, the terms “of”, “corresponding, relevant”, “corresponding” and “associated” may sometimes be used interchangeably. It should be noted that when the distinction between them is not emphasized, the meanings they intend to express are consistent.

Claims

1. A refrigerator, characterized in that: include: The cabinet includes a refrigerator and a freezer; A refrigeration system is arranged in the box, and the refrigeration system includes: compressor; Condenser; a first evaporator capable of refrigerating the freezing chamber; a second evaporator capable of refrigerating the refrigerating chamber; The first electric valve; a second electric valve; and The third electric valve; Wherein, the exhaust port of the compressor is communicated with the first inlet of the first electric valve, the condenser is communicated with the first outlet of the first electric valve, the second outlet of the first electric valve is communicated with the third inlet of the third electric valve through a defrost heating pipe zigzagly arranged at the bottom of the first evaporator; the fifth outlet of the third electric valve is communicated with the second evaporator through a first throttling device, and the sixth outlet of the third electric valve is communicated with the outlet of the condenser; the condenser is communicated with the second inlet of the second electric valve, the third outlet of the second electric valve is communicated with the first evaporator, and the fourth outlet of the second electric valve is communicated with the second evaporator; the outlet of the first evaporator and the outlet of the second evaporator are communicated with the air inlet of the compressor; When the refrigeration system is in the rapid cooling mode, the compressor operates at a first speed; the fourth outlet of the second electric valve is opened; the first outlet of the first electric valve is opened; the third inlet of the third electric valve is closed, and its first outlet and second outlet are opened; wherein the first speed is less than the maximum speed of the compressor.

2. The refrigerator according to claim 1, characterized in that: When there is a refrigeration demand for the freezing chamber, the third outlet of the second electric valve is opened, so that the first evaporator cools the freezing chamber.

3. The refrigerator according to claim 1, characterized in that: A second throttling device is provided in the passage between the sixth outlet of the third electric valve and the outlet of the condenser.

4. The refrigerator according to claim 1, characterized in that: When the refrigeration system is in the defrost mode, the third outlet and the fourth outlet of the second electric valve are closed, the second outlet of the first electric valve is opened, and the sixth outlet of the third electric valve is opened.

5. The refrigerator according to claim 1, characterized in that: A fourth throttling device is provided between the fourth outlet of the second electric valve and the second evaporator, and a third throttling device is provided between the third outlet of the second electric valve and the first evaporator.

6. The refrigerator according to claim 5, characterized in that: The flow rate of the third throttling device is greater than the flow rate of the fourth throttling device.

7. The refrigerator according to claim 6, characterized in that: The third throttling device and the fourth throttling device are capillaries of different lengths; The length of the third throttling device is smaller than the length of the fourth throttling device.

8. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: a controller electrically connected to the refrigeration system, wherein the controller is configured to: After the fourth outlet of the second electric valve is opened, the first outlet of the first electric valve is opened, and the fifth outlet and the sixth outlet of the third electric valve are opened, controlling the compressor to operate at a second speed; After the compressor runs at the second speed for a preset period of time, the compressor is controlled to run at the first speed until the refrigeration system exits the rapid refrigeration mode, and the second speed is less than the first speed.

9. The refrigerator according to claim 8, characterized in that: The controller is further configured to: When the refrigeration system is in a refrigeration mode, the fifth outlet and the sixth outlet of the third electric valve are controlled to be closed, the first outlet of the first electric valve is controlled to be opened, and the third outlet of the second electric valve is controlled to be opened, so as to refrigerate the freezing chamber; After the freezing chamber is refrigerated, controlling the fourth outlet of the second electric valve to open to refrigerate the refrigerating chamber; After the refrigeration of the refrigerating chamber is completed, the compressor is controlled to stop.

10. The refrigerator according to claim 1, characterized in that: When the refrigeration system is in a cooling mode, the fifth and sixth outlets of the third electric valve are closed, at least one of the third outlet or the fourth outlet of the second electric valve is opened, and the first outlet of the first electric valve is opened.

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