Refrigerator with compressor

Abstract

The invention discloses a refrigerator with a compressor, relates to the technical field of refrigerators, and aims to solve the problem that the oil absorption amount of operating parts of the compressor cannot be stably provided. The refrigerator with the compressor comprises the compressor and an adjusting part. The compressor comprises a machine shell and a mechanical body, the machine shell is provided with an air return end and internally filled with lubricating oil, the mechanical body is installed in the machine shell and used for compressing gaseous refrigerants, and the mechanical body is provided with an exhaust end and used for exhausting the compressed refrigerants. The adjusting part is installed in the machine shell and is configured to adjust the liquid level height of the lubricating oil in the machine shell by controlling the size of the adjusting part, and the adjusting part is used for controlling the suction speed of the mechanical body to the lubricating oil. The refrigerator is used for improving the lubricating effect of the compressor and prolonging the service life of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and particularly to a refrigerator provided with a compressor. Background Art

[0002] A refrigerator is a common electrical appliance in people's daily lives. For example, the freezing chamber, refrigerating chamber, and variable-temperature chamber of the refrigerator are cooled by a refrigerant compressed by a compressor and driven to circulate. Among them, during the mechanical movement of the compressor for compressing the refrigerant, lubricating oil is required to lubricate its own components to prevent mechanical failures caused by long-term wear, thereby improving the service life of the compressor.

[0003] Inside the compressor, the lubricating oil is stored near the bottom of the compressor, and the rotating components of the compressor absorb lubricating oil for lubrication through an oil suction end that is close to or inserted below the liquid level of the lubricating oil during operation. Since the relative position of the oil suction end inside the compressor is relatively fixed, that is, the port height of the oil suction end cannot be adjusted arbitrarily. And the oil suction structure of the compressor at the oil suction end has the following characteristics: the higher the liquid level height of the lubricating oil, the more lubricating oil is extracted by the oil suction end, and the lower the liquid level height of the lubricating oil, the less lubricating oil is extracted by the oil suction end.

[0004] When the amount of lubricating oil sucked into the compressor through the oil suction end is small, it will cause excessive wear of the rotating components of the compressor, thereby reducing the service life of the compressor. When there is more lubricating oil in the compressor, more oil mist and oil suction amount will affect the suction and compression efficiency of the compressor for gaseous refrigerant. For example, if more lubricating oil flows into the piston chamber of the rotating components of the compressor, it will reduce the suction amount of gaseous refrigerant and lower the compression efficiency of the compressor. Summary of the Invention

[0005] The present invention provides a refrigerator provided with a compressor, aiming to solve the problem that the oil suction amount of the rotating components of the compressor cannot be stably provided.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The present application provides a refrigerator provided with a compressor, including a compressor and an adjusting member. The compressor includes a housing and a mechanical main body. The housing is provided with a suction end and contains lubricating oil inside. The mechanical main body is installed inside the housing and is used to compress gaseous refrigerant. The mechanical main body has an exhaust end for discharging the compressed refrigerant. The adjusting member is installed inside the housing and is configured to: adjust the liquid level height of the lubricating oil in the housing by controlling the volume of the adjusting member to control the oil suction speed of the mechanical main body for the lubricating oil.

[0008] Since the lubricating oil will mix with the compressed refrigerant and flow out of the compressor from the exhaust end, during the operation of the mechanical body and driving the refrigerant to circulate at a relatively low speed, the relatively low flow rate of the refrigerant will cause more lubricating oil to remain in the refrigerant pipeline (such as the evaporator and condenser), resulting in a reduction in the lubricating oil in the casing, that is, the liquid level of the lubricating oil will decrease, resulting in a reduction in the lubricating oil sucked by the mechanical body through the oil suction end. At this time, by controlling the volume of the adjusting member, the liquid level height of the lubricating oil in the casing can be maintained in a relatively stable state, so that the amount of lubricating oil sucked by the mechanical body will not be greatly reduced.

[0009] When the mechanical body drives the refrigerant to flow rapidly at a relatively high speed, the rapidly flowing refrigerant will drive most of the lubricating oil to flow back into the casing, resulting in an increase in the lubricating oil in the casing, that is, the liquid level of the lubricating oil will rise, resulting in an increase in the lubricating oil absorbed by the mechanical body through the oil suction end. At this time, by controlling the volume of the adjusting member, the liquid level height of the lubricating oil in the casing can be maintained in a relatively stable state, that is, the amount of lubricating oil absorbed by the mechanical body will not be greatly increased.

[0010] Based on this, by adjusting and controlling the volume of the adjusting member, the liquid level height of the lubricating oil in the casing can be maintained within an appropriate height range. Even if the amount of lubricating oil in the casing is greatly reduced or greatly increased, under the adjustment of the adjusting member, the liquid level height of the lubricating oil in the casing can be maintained within an appropriate height range, so that the oil absorption amount of the mechanical body is neither too much nor too little, that is, the mechanical body can compress the refrigerant stably and efficiently under sufficient lubrication, which is beneficial to improving the service life of the compressor.

[0011] In some embodiments, a refrigerator provided with a compressor includes a compressor and an adjusting member. The compressor includes a casing and a mechanical body. The casing is provided with a suction end and contains lubricating oil inside. The mechanical body is installed in the casing and is used to compress gaseous refrigerant. The mechanical body has an exhaust end for discharging the compressed refrigerant. The adjusting member includes an airbag, and at least part of the airbag is immersed in the lubricating oil. The airbag is configured to: adjust the liquid level height of the lubricating oil in the casing by controlling the volume of the airbag, and is used to control the oil absorption speed of the mechanical body. By controlling the volume of the airbag to adjust the liquid level height in the casing 311, the structure is simple and effective.

[0012] In some embodiments, a refrigerator provided with a compressor includes a condenser, a pressure reducer, an evaporator, and a pressure regulating circuit. One end of the condenser is connected to the exhaust end, one end of the evaporator is connected to the suction end, and the other end of the evaporator is connected to the other end of the condenser through a pressure reducer. Along the flow direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected and communicated with the airbag through a pressure regulating circuit. Through the setting of the pressure regulating circuit, the volume of the airbag can be automatically adjusted to keep the lubricating oil in the casing at an appropriate height.

[0013] In some embodiments, a refrigerator equipped with a compressor includes a first switching valve. The first switching valve is a two-position two-way electrically controlled valve. Along the flow direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the airbag through the first switching valve to form a pressure regulating circuit. The first switching valve is used to control the pressure regulating circuit to be in a conducting state or a closed state. Through the first switching valve, the conducting state and the closed state of the pressure regulating circuit can be controlled.

[0014] In some embodiments, a refrigerator equipped with a compressor includes a four-way valve, a condenser, a pressure reducer, an evaporator, and a pressure regulating circuit. The four-way valve has a first port, a second port, a third port, and a fourth port. The first port is connected to the suction end, and the second port is connected to the discharge end. One end of the condenser is connected to the third port, and one end of the evaporator is connected to the fourth port. The other end of the evaporator is connected to the other end of the condenser through the pressure reducer. The pressure regulating circuit includes a pressure regulating refrigeration circuit and a pressure regulating defrosting circuit. Along the flow direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the airbag through the pressure regulating refrigeration circuit, and one end of the condenser close to the pressure reducer is connected to the airbag through the pressure regulating defrosting circuit. The first port is in communication with the fourth port, and the second port is in communication with the third port, so that the evaporator is in the refrigeration mode, the pressure regulating refrigeration circuit is conducting and the pressure regulating defrosting circuit is closed. The first port is in communication with the third port, and the second port is in communication with the fourth port, so that the evaporator is in the defrosting mode, the pressure regulating refrigeration circuit is closed and the pressure regulating defrosting circuit is conducting. According to the different structures of the refrigerator, the setting mode of the pressure regulating circuit is adjusted to enable the airbag to be normally used in the refrigeration mode and the defrosting mode.

[0015] In some embodiments, a refrigerator equipped with a compressor includes a second switching valve and a third switching valve. The second switching valve is a two-position two-way electrically controlled valve. Along the flow direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the airbag through the second switching valve to form a pressure regulating refrigeration circuit. The third switching valve is a two-position two-way electrically controlled valve. Along the flow direction of the refrigerant, one end of the condenser close to the pressure reducer is connected to the airbag through the third switching valve to form a pressure regulating defrosting circuit. Through the adjustment and control of the second switching valve and the third switching valve, it is convenient to make the airbag conduct different positions in the refrigeration mode and the defrosting mode.

[0016] In some embodiments, a refrigerator equipped with a compressor includes a controller. The controller is electrically connected to the four-way valve, the second switching valve, and the third switching valve. The controller adjusts the four-way valve to be in the refrigeration mode, and the controller controls the second switching valve to open and the third switching valve to close.

[0017] In some embodiments, a refrigerator equipped with a compressor includes a controller. The controller is electrically connected to the four-way valve, the second switching valve, and the third switching valve. The controller adjusts the four-way valve to be in the defrosting mode, and the controller controls the second switching valve to close and the third switching valve to open.

[0018] In some embodiments, a refrigerator equipped with a compressor includes a fourth switching valve, which is a two-position three-way electrically controlled valve. The first end of the fourth switching valve is connected to the airbag. Along the flow direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the second end of the fourth switching valve to form a pressure regulating refrigeration circuit, and one end of the condenser close to the pressure reducer is connected to the third end of the fourth switching valve to form a pressure regulating defrosting circuit. By providing the fourth switching valve, it is convenient to make the airbag conduct different positions in the refrigeration condition and the defrosting condition.

[0019] In some embodiments, a refrigerator equipped with a compressor further includes a balancing member, which includes a balancing tank and an isolation membrane. The balancing tank has two ports. One port of the balancing tank is connected to the airbag, and the other port of the balancing tank is connected to the pressure regulating circuit. The isolation membrane is installed inside the balancing tank and is located between the two ports of the balancing tank to prevent the refrigerant from flowing into the airbag.

[0020] In some embodiments, the balancing tank is at least installed above the evaporator, and one port of the balancing tank far from the airbag is arranged close to the bottom of the balancing tank, so that the refrigerant that releases heat and liquefies in the balancing tank can flow back into the evaporator. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Schematic three-dimensional structure diagram of a refrigerator provided by an embodiment of the present application;

[0023] Figure 2 For Figure 1 A cross-sectional view of the box shown in

[0024] Figure 3 Schematic connection diagram of the first refrigerator provided by the embodiment of the present application in the refrigeration condition;

[0025] Figure 4 For Figure 3 Schematic connection diagram of the first refrigerator shown in the defrosting condition;

[0026] Figure 5 Schematic internal structure diagram of the first compressor provided by the embodiment of the application;

[0027] Figure 6 Schematic single-cooling structure diagram of the first refrigerator provided by the embodiment of the present application;

[0028] Figure 7 Schematic connection diagram of the second refrigerator provided by the embodiment of the present application in the refrigeration working condition;

[0029] Figure 8 Schematic connection diagram of the second refrigerator provided by the embodiment of the present application in the defrosting working condition;

[0030] Figure 9 Schematic connection diagram of the third refrigerator provided by the embodiment of the present application in the refrigeration working condition;

[0031] Figure 10 Schematic connection diagram of the third refrigerator provided by the embodiment of the present application in the defrosting working condition;

[0032] Figure 11 It is Figure 7 A schematic control connection diagram of the four-way valve, the second switching valve and the third switching valve shown in;

[0033] Figure 12 It is Figure 7 Another schematic control connection diagram of the four-way valve, the second switching valve and the third switching valve shown in;

[0034] Figure 13 It is Figure 9 A schematic control connection diagram of the four-way valve and the fourth switching valve shown in;

[0035] Figure 14 Schematic connection diagram of the fourth refrigerator provided by the embodiment of the present application in the refrigeration working condition;

[0036] Figure 15 Schematic internal structure diagram of the second compressor provided by the embodiment of the present application;

[0037] Figure 16 Schematic control connection diagram of the first heating element provided by the embodiment of the present application;

[0038] Figure 17 Schematic control connection diagram of the second heating element provided by the embodiment of the present application;

[0039] Figure 18 Schematic control connection diagram of the third heating element provided by the embodiment of the present application;

[0040] Figure 19 Schematic single-cooling structure diagram of the second refrigerator provided by the embodiment of the present application;

[0041] Figure 20 Schematic connection diagram of the fourth refrigerator provided by the embodiment of the present application in the refrigeration working condition.

[0042] Reference numerals:

[0043] 100 - Refrigerator;

[0044] 1 - Box body; 11 - Storage cavity; 12 - Outer shell; 13 - Inner liner; 14 - Thermal insulation layer;

[0045] 2 - Door body;

[0046] 31 - Compressor; 311 - Housing; 312 - Mechanical main body; 313 - Suction gas end; 314 - Discharge end; 315 - Oil suction end; 32 - Four-way valve; 33 - Condenser; 34 - Pressure reducer; 35 - Evaporator;

[0047] 4 - Adjusting part; 41 - Air bag;

[0048] 5 - Pressure regulating circuit; 51 - Pressure regulating refrigeration circuit; 52 - Pressure regulating defrosting circuit;

[0049] 61 - First switching valve; 62 - Second switching valve; 63 - Third switching valve; 64 - Fourth switching valve;

[0050] 7 - Controller; 71 - Temperature control module; 72 - Delay control module

[0051] 81 - First switching element; 82 - Pressure regulating switch; 83 - Pressure regulating first switch; 84 - Pressure regulating second switch; 85 - Second switching element; 86 - Third switching element; 87 - Fourth switching element; 88 - Fifth switching element;

[0052] 91 - Balancing part; 911 - Balancing tank; 912 - Isolation membrane; 92 - Heating part; 93 - First temperature sensor; 94 - Second temperature sensor. Detailed implementation manners

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is the orientation or relative positional relationship based on the orientation shown in the accompanying drawings, and is 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 should not be construed as a limitation to the present invention. Without special instructions, in the case of satisfying the relative positional relationship shown in the accompanying drawings, the above-described orientation description can be flexibly set during the actual application process.

[0055] 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. Therefore, the features defined as "first" and "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.

[0056] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "connected" should be understood in a broad sense, such as fixed connection, detachable connection, and integral connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the electrical connection 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.

[0057] In the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0058] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present invention 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 the relevant concepts in a specific way.

[0059] like Figure 1 As shown, Figure 1 A schematic diagram of the three-dimensional structure of a refrigerator (hereinafter referred to as refrigerator 100) provided with a compressor in an embodiment of the present application is provided. The refrigerator 100 may include a box body 1 and a door body 2. The box body 1 may be a box-shaped structure that is approximately a rectangular parallelepiped, or a box-shaped structure of other shapes. A storage cavity 11 is formed inside the box body 1 for freezing or refrigerating preset items. The door body 2 is connected to the box body 1 so that the door body 2 can open or close the storage cavity 11.

[0060] Exemplarily, the door body 2 can be rotatably connected to one side of the box body 1, so that the door body 2 can be rotated to open or close the storage cavity 11. Alternatively, the door body 2 can be connected to the box body 1 through a hinge or a guide rail, and both can meet the requirements of opening or closing the storage cavity 11 through the door body 2.

[0061] In some embodiments, as Figure 2 shown, the box body 1 may include an outer shell 12, an inner container 13, and a thermal insulation layer 14. A storage cavity 11 is formed inside the inner container 13, and the storage cavity 11 is used for refrigerating or freezing preset items. The inner container 13 is located inside the outer shell 12 to improve the structural strength of the box body 1 through the outer shell 12. The thermal insulation layer is filled between the inner container 13 and the outer shell 12 to reduce the heat exchange between the storage cavity 11 and the external environment, thereby increasing the low-temperature preservation period of the preset items in the storage cavity 11 and facilitating the reduction of refrigeration power consumption.

[0062] To maintain a stable freezing and / or refrigerating temperature inside the storage cavity 11, as Figure 3 shown, the refrigerator 100 includes a compressor 31, a four-way valve 32, a condenser 33, a pressure reducer 34, and an evaporator 35. The compressor 31 has a suction end and a discharge end, and the four-way valve 32 has a first port A, a second port B, a third port C, and a fourth port D. The first port A is connected to the suction end, the second port B is connected to the discharge end, one end of the condenser 33 can be connected to the third port C, one end of the evaporator 35 can be connected to the other end of the condenser 33 through the pressure reducer 34, and the other end of the evaporator 35 can be connected to the fourth port D.

[0063] When the first port A is Figure 3 shown to be in communication with the fourth port D, and the second port B is in communication with the third port C, so that the refrigerator 100 is in a refrigeration working condition, the refrigerant flowing out of the discharge end of the compressor 31 can circulate sequentially along the second port B, the third port C, the condenser 33, the pressure reducer 34, the evaporator 35, the fourth port D, the first port A, and the suction end of the compressor 31.

[0064] In this way, the gaseous refrigerant flowing out of the compressor 31 can be liquefied at the condenser 33 and release heat. After the liquefied refrigerant flows through the pressure reducer 34 of the capillary tube or electronic throttling valve structure, it will vaporize in the evaporator 35 and absorb heat through the evaporator 35, thereby cooling the surroundings of the evaporator 35, and the vaporized refrigerant is sucked into the compressor 31 and compressed. The air in the storage cavity 11 can be circulated through the evaporator 35 through the setting of the air duct structure and the fan to maintain the refrigerating temperature and freezing temperature in the storage cavity 11 (such as the freezing chamber, the refrigerating chamber, and the variable temperature chamber). Since the refrigeration of the compressor 31 has a high power consumption ratio, it is beneficial to improve the energy-saving effect of the refrigerator 100 in the refrigeration working condition, that is, the refrigerator 100 consumes less electricity and is environmentally friendly.

[0065] In addition, when the first port A is Figure 4When the third port C is conducted as shown, and the second port B and the fourth port D are conducted to make the refrigerator 100 in the defrosting condition, the refrigerant flowing out from the exhaust end of the compressor 31 can circulate in turn along the second port B, the fourth port D, the evaporator 35, the pressure reducer 34, the condenser 33, the third port C, the first port A and the suction end of the compressor 31, that is, compared with the refrigeration condition, the refrigerant flows reversely among the condenser 33, the pressure reducer 34 and the evaporator 35.

[0066] In this way, the gaseous refrigerant flowing out from the compressor 31 can be liquefied and release heat at the evaporator 35. After flowing through the pressure reducer 34, the liquefied refrigerant will vaporize in the condenser 33 and absorb heat through the condenser 33, so as to cool the periphery of the evaporator 35, and the vaporized refrigerant is sucked into the compressor 31 and compressed. If frosting occurs on the surface of the evaporator 35 during the refrigeration condition, the refrigerator 100 can be adjusted to the defrosting condition to melt the frost on the surface of the evaporator 35 by the liquefaction heat release of the refrigerant, so as to improve the heat exchange efficiency between the evaporator 35 and the flowing air.

[0067] Between the compressor 31, the condenser 33 and the evaporator 35, the four-way valve 32 in the above embodiment can be used to switch the refrigeration condition and the heating condition of the refrigerator 100. In addition, a switching circuit of the refrigeration condition and the heating condition can also be formed by connecting solenoid valves and flow pipelines.

[0068] For example, the exhaust end of the compressor 31, the condenser 33, the pressure reducer 34, the evaporator 35 and the suction end of the compressor 31 are connected in turn. A two-position three-way valve is connected between the evaporator 35 and the suction end of the compressor 31, and another two-position three-way valve is connected between the condenser 33 and the exhaust end of the compressor 31. The last port of the former two-position three-way valve is connected to the exhaust end of the compressor 31 through a pipeline, and the last port of the latter two-position three-way valve is connected to the suction end of the compressor 31 through a pipeline, that is, by controlling the conduction states of the two two-position three-way valves, the refrigerator 100 can also be switched and adjusted between the refrigeration condition and the defrosting condition.

[0069] Heating and defrosting the evaporator 35 by the countercurrent of the refrigerant can improve the defrosting speed and melting efficiency of the surface of the evaporator 35, and has a high energy consumption ratio.

[0070] In some embodiments, such as Figure 5 shown Figure 5Schematic diagram of the internal structure of a compressor 31 provided for the application example. The compressor 31 includes a housing 311 and a mechanical main body 312. The housing 311 can form a closed space for accommodating and installing the mechanical main body 312 and containing lubricating oil. The housing 311 is provided with a suction end 313 for sucking refrigerant, so that the refrigerant can be sucked into the housing 311 driven by the mechanical main body 312, and the mechanical main body 312 can suck the refrigerant in the housing 311 during operation and is used to compress the gaseous refrigerant.

[0071] Continue to refer to Figure 5 , the mechanical main body 312 has an exhaust end 314 for discharging the compressed refrigerant. The exhaust end 314 can be arranged to penetrate the housing 311, which is convenient for connecting the refrigerant pipeline so that the refrigerant can circulate between the condenser 33 (as Figure 3 shown) and the evaporator 35.

[0072] Since the mechanical main body 312 of the compressor 31 needs lubricating oil to lubricate its own components during the mechanical operation of compressing the refrigerant to prevent mechanical failures caused by long-term wear, thereby improving the service life of the compressor 31.

[0073] Inside the housing 311, the lubricating oil is placed near the lower part of the housing 311. The mechanical main body 312, as Figure 5 shown, is also provided with an oil suction end 315 for extracting lubricating oil to lubricate the moving parts of the mechanical main body 312.

[0074] Inside the housing 311, since the relative position of the port of the oil suction end 315 is relatively fixed, that is, the port height of the oil suction end 315 cannot be adjusted arbitrarily. The oil suction structure of the compressor 31 at the oil suction end 315 has the following characteristics: the higher the liquid level height of the lubricating oil, such as the higher the liquid level of the lubricating oil submerging the port of the oil suction end 315, the more lubricating oil is extracted by the oil suction end 315, and the lower the liquid level height of the lubricating oil, the less lubricating oil is extracted by the oil suction end 315.

[0075] When the mechanical main body 312 sucks less lubricating oil, it will cause excessive wear of the mechanical main body 312, thereby reducing the service life of the compressor 31. When there is more lubricating oil in the housing 311, more oil mist and oil suction amount will affect the suction and compression efficiency of the mechanical main body 312 for the gaseous refrigerant. For example, if more lubricating oil flows into the piston chamber of the mechanical main body 312, it will reduce the suction amount of the gaseous refrigerant and lower the compression efficiency of the compressor.

[0076] Based on this, as Figure 5 and Figure 6As shown, the refrigerator 100 includes an adjusting member 4. The adjusting member 4 may include an airbag 41 and is installed in the housing 311. At least part of the airbag 41 is immersed in the lubricating oil. The airbag 41 is configured to adjust the liquid level height of the lubricating oil in the housing 311 by controlling the volume of the airbag 41, so as to control the suction speed of the mechanical body 312 for the lubricating oil.

[0077] Since the lubricating oil will be mixed with the compressed refrigerant and flow out of the compressor 31 from the exhaust end, during the operation of the mechanical body 312 and driving the refrigerant to circulate at a low speed, the low flow speed of the refrigerant will cause more lubricating oil to remain in the refrigerant pipeline (such as the evaporator 35 and the condenser 33), resulting in a reduction in the lubricating oil in the housing 311, that is, the liquid level of the lubricating oil will decrease, resulting in a reduction in the lubricating oil sucked by the mechanical body 312 through the oil suction end 315. At this time, by controlling the increase in the volume of the airbag 41, the liquid level height of the lubricating oil in the housing 311 can be maintained in a relatively stable state, so that the amount of lubricating oil sucked by the mechanical body 312 will not be greatly reduced.

[0078] When the mechanical body 312 drives the refrigerant to flow rapidly at a high speed, the rapidly flowing refrigerant will drive most of the lubricating oil to flow back into the housing 311, resulting in an increase in the lubricating oil in the housing 311, that is, the liquid level of the lubricating oil will rise, resulting in an increase in the lubricating oil absorbed by the mechanical body 312 through the oil suction end. At this time, by controlling the reduction in the volume of the airbag 41, the liquid level height of the lubricating oil in the housing 311 can be maintained in a relatively stable state, that is, the amount of lubricating oil absorbed by the mechanical body 312 will not increase greatly.

[0079] Based on this, by adjusting and controlling the volume of the airbag 41, the liquid level height of the lubricating oil in the housing 311 can be maintained within an appropriate height range. Even if the amount of lubricating oil in the housing 311 is greatly reduced or increased, under the adjustment of the airbag 41, the liquid level height of the lubricating oil in the housing 311 can be maintained within an appropriate height range, so that the oil suction amount of the mechanical body 312 is neither too much nor too little, that is, the mechanical body 312 can compress the refrigerant stably and efficiently under sufficient lubrication, which is beneficial to improving the service life of the compressor 31.

[0080] In some embodiments, as Figure 6 shown, Figure 6 is a schematic diagram of a single-cooling structure of a refrigerator provided by an embodiment of the present application. The refrigerant can circulate between the compressor 31, the condenser 33, the pressure reducer 34, the evaporator 35 and the compressor 31 to cool the storage cavity 11 of the refrigerator 100 through the evaporator 35 (such as Figure 1Cooling is carried out as shown. On this basis, the refrigerator 100 further includes a pressure regulating circuit 5. The airbag 41 is installed in the compressor 31 and is connected and conducted through the pressure regulating circuit 5 to the liquid inlet end of the evaporator 35 (i.e., the end of the evaporator 35 close to the pressure reducer 34 along the flow direction of the refrigerant).

[0081] In this way, when the compressor 31 operates at a low speed to drive the refrigerant to flow slowly, since more lubricating oil will remain in the evaporator 35, the refrigerant pipeline of the evaporator 35 will have a large flow resistance, so that there is a large pressure difference (the pressure at the gas return end is lower) between the liquid inlet end of the evaporator 35 and the gas return end of the compressor 31 (such as inside the housing). As a result, part of the gaseous refrigerant can flow into the airbag 41 through the pressure regulating circuit 5 and the airbag 41 will expand under the action of the pressure difference. At this time, although a large amount of lubricating oil in the housing 311 decreases, the expanded airbag 41 will keep the liquid level height of the lubricating oil within an appropriate range, so that the oil absorption amount of the mechanical main body 312 will not be too small, thus ensuring the stable operation of the mechanical main body 312 under sufficient lubrication.

[0082] When the compressor 31 operates at a high speed to drive the refrigerant to flow rapidly, since the rapidly flowing refrigerant will cause most of the lubricating oil to flow back into the compressor 31, that is, less lubricating oil remains in the evaporator 35. At this time, the flow resistance and pressure difference between the liquid inlet end of the evaporator 35 and the gas return end of the compressor 31 are small. That is, the pressure difference inside and outside the airbag 41 is small, so that the volume of the airbag 41 shrinks (reduces). At this time, although a large amount of lubricating oil in the housing 311 increases, the retracted airbag 41 will keep the liquid level height of the lubricating oil within an appropriate range, so that the oil absorption amount of the mechanical main body 312 will not be too much or too little, so that the mechanical main body 312 can stably and efficiently compress the refrigerant under sufficient lubrication.

[0083] In some embodiments, as Figure 6 shown, the refrigerator 100 may further include a first switching valve 61, and the first switching valve 61 may be a two-position two-way electrically controlled valve. Along the flow direction of the refrigerant, one end of the evaporator 35 close to the pressure reducer 34 is connected to the airbag through the first switching valve 61 to form a pressure regulating circuit 5. In this way, the pressure regulating circuit 5 can be controlled to be in a conducting state or a closed state by opening or closing the first switching valve 61.

[0084] In Figure 6 the shown embodiment, the airbag 41 for adjusting the liquid level height of the lubricating oil in the housing 311 is applied to the refrigerator system with a single cooling structure. In addition, the above structure of the airbag 41 and the pressure regulating circuit 5 can also be applied to the reverse flow defrosting refrigerator system.

[0085] As Figure 7 and Figure 8 shown, through the setting of switching structures such as the four-way valve 32, the refrigerator 100 can be inFigure 7 the shown refrigeration operating condition and Figure 8 switch and adjust between the shown defrosting operating condition. Based on this, it can be set that the pressure regulating circuit 5 includes a pressure regulating refrigeration circuit 51 and a pressure regulating defrosting circuit 52. Along the flowing direction of the refrigerant, one end of the evaporator 35 close to the pressure reducer 34 is connected to the airbag 41 through the pressure regulating refrigeration circuit 51, and one end of the condenser 33 close to the pressure reducer 34 is connected to the airbag 41 through the pressure regulating defrosting circuit.

[0086] In this way, when the refrigerant circulates in sequence among the compressor 31, the condenser 33, the pressure reducer 34, the evaporator 35 and the compressor 31 as shown in Figure 7 to make the refrigerator 100 and the evaporator 35 in the refrigeration operating condition, the pressure regulating refrigeration circuit 51 can be configured to be turned on and the pressure regulating defrosting circuit 52 to be closed, so that the airbag 41 is connected to and turned on with the liquid inlet end of the evaporator 35 in the refrigeration operating condition. It is convenient to adjust the liquid level height of the lubricating oil in the machine shell (as shown in Figure 5 ) so that the oil absorption amount of the mechanical main body 312 is neither too much nor too little, so that the mechanical main body 312 can stably and efficiently compress the refrigerant under sufficient lubrication.

[0087] When the refrigerant circulates in sequence among the compressor 31, the evaporator 35, the pressure reducer 34, the condenser 33 and the compressor 31 as shown in Figure 8 to make the refrigerator 100 and the evaporator 35 in the defrosting operating condition, the pressure regulating defrosting circuit 52 can be configured to be turned on and the pressure regulating refrigeration circuit 51 to be closed, so that the airbag 41 is connected to and turned on with the liquid inlet end of the condenser 33. At this time, the condenser 33 is equivalent to the evaporator 35 in the refrigeration operating condition, that is, the volume of the airbag 41 in the machine shell 311 (as shown in Figure 5 ) is adjusted through the pressure difference between the liquid inlet end of the condenser 33 and the return air end of the compressor 31, so that the liquid level height of the lubricating oil in the machine shell 311 is kept within an appropriate range, avoiding too much or too little oil absorption amount of the mechanical main body 312, so that the mechanical main body 312 can stably and efficiently compress the refrigerant under sufficient lubrication.

[0088] In order to facilitate the control of the on state and off state of the pressure regulating refrigeration circuit 51 and the pressure regulating defrosting circuit 52, as shown in Figure 7 and Figure 8 , the refrigerator 100 further includes a second switching valve 62 and a third switching valve 63, and both the second switching valve 62 and the third switching valve 63 are two-position two-way electrically controlled valves. Along the flowing direction of the refrigerant, one end of the evaporator 35 close to the pressure reducer 34 is connected to the airbag 41 through the second switching valve 62 to form the pressure regulating refrigeration circuit 51, and one end of the condenser 33 close to the pressure reducer 34 is connected to and turned on with the airbag 41 through the third switching valve 63 to form the pressure regulating defrosting circuit 52.

[0089] In this way, when the refrigerator 100 is inFigure 7 When in the refrigeration condition shown, the second switching valve 62 can be controlled to open and the third switching valve 63 can be controlled to close, so that the pressure-regulating refrigeration circuit 51 is in a conducting state and the pressure-regulating defrosting circuit 52 is in a closed state, that is, the volume of the airbag 41 is adjusted through the pressure difference between the liquid inlet end of the evaporator 35 and the suction end of the compressor 31, so as to control the liquid level height of the lubricating oil in the machine housing 311.

[0090] Or, when the refrigerator 100 is in Figure 8 the defrosting condition shown, the third switching valve 63 can be controlled to open and the second switching valve 62 can be controlled to close, so that the pressure-regulating refrigeration circuit 51 is in a closed state and the pressure-regulating defrosting circuit 52 is in a conducting state, that is, the volume of the airbag 41 is adjusted through the pressure difference between the liquid inlet end of the condenser 33 and the suction end of the compressor 31, so as to control the liquid level height of the lubricating oil in the machine housing 311.

[0091] It should be noted that in the case where the pressure-regulating circuit 5 includes the pressure-regulating refrigeration circuit 51 and the pressure-regulating defrosting circuit 52: one end of the pressure-regulating refrigeration circuit 51 far from the airbag 41 can be connected to one end of the evaporator 35 close to the pressure reducer 34, or can be connected to one end of the pressure reducer 34 close to the evaporator 35. Correspondingly, one end of the pressure-regulating defrosting circuit 52 far from the airbag 41 can be connected to one end of the condenser 33 close to the pressure reducer 34, or can also be connected to one end of the pressure reducer 34 close to the condenser 33, and no limitation is made thereto.

[0092] In some other embodiments, as Figure 9 and Figure 10 shown, the refrigerator 100 further includes a fourth switching valve 64. The fourth switching valve 64 can be a two-position three-way electrically controlled valve and has three connection ends. The first end of the fourth switching valve 64 is connected to the airbag 41. Along the flowing direction of the refrigerant, one end of the evaporator 35 close to the pressure reducer 34 is connected to the second end of the fourth switching valve 64 to form the pressure-regulating refrigeration circuit 51. And along the flowing direction of the refrigerant, one end of the condenser 33 close to the pressure reducer 34 is connected to the third end of the fourth switching valve 64 to form the pressure-regulating defrosting circuit 52.

[0093] In this way, by controlling the state of the two-position three-way electrically controlled valve, the first end and the second end of the fourth switching valve 64 are made to conduct, and the third end of the fourth switching valve 64 is blocked, so as to conduct the pressure-regulating refrigeration circuit 51 and close the pressure-regulating defrosting circuit 52. In addition, the state of the two-position three-way electrically controlled valve can also be controlled to make the first end and the third end of the fourth switching valve 64 conduct, and the second end of the fourth switching valve 64 is blocked, so as to conduct the pressure-regulating defrosting circuit 52 and close the pressure-regulating refrigeration circuit.

[0094] In the above embodiments, the pressure regulating circuit 5 may include a first pipeline, a second pipeline, and a third pipeline. The first end of the fourth switching valve 64 may be connected to the airbag 41 through the first pipeline. The second end of the fourth switching valve 64 may be connected to one end of the evaporator 35 close to the pressure reducer 34 through the second pipeline to form a pressure regulating refrigeration circuit 51, and the third end of the fourth switching valve 64 may be connected to one end of the condenser 33 close to the pressure reducer 34 through the third pipeline to form a pressure regulating defrosting circuit 52.

[0095] In some embodiments, as Figure 11 shown, the refrigerator 100 further includes a controller 7 to Figure 7 and Figure 8 taking the pressure regulating circuit 5 formed by the second switching valve 62 and the third switching valve 63 as an example as shown, the controller 7 may be electrically connected to the second switching valve 62, the third switching valve 63, and the four-way valve 32.

[0096] Thus, the four-way valve 32 and the refrigerator 100 can be adjusted through the controller 7 to be in Figure 7 the refrigeration working condition as shown. At this time, the controller 7 (as Figure 11 shown) can control the second switching valve 62 to be in the open state and control the third switching valve 63 to be in the closed state. To make the pressure regulating refrigeration circuit 51 in the conducting state and close the pressure regulating defrosting circuit 52.

[0097] Correspondingly, the four-way valve 32 and the refrigerator 100 can also be adjusted through the controller 7 to be in Figure 8 the defrosting working condition as shown. At this time, the controller 7 (as Figure 11 shown) can control the second switching valve 62 to be closed and control the third switching valve 63 to be in the open state. To make the pressure regulating refrigeration circuit 51 closed in the defrosting working condition and conduct the pressure regulating defrosting circuit 52 in the defrosting working condition.

[0098] Exemplarily, the four-way valve 32 can be set to make the refrigerator 100 in the refrigeration working condition in the default state, and the four-way valve 32 is electrified to make the refrigerator 100 in the defrosting working condition. Correspondingly, the second switching valve 62 is in the normally open state and the third switching valve 63 is in the normally closed state, that is, the pressure regulating circuit 5 conducts the pressure regulating refrigeration circuit 51 and closes the pressure regulating defrosting circuit 52 when the second switching valve 62 and the third switching valve 63 are not powered on, and the pressure regulating refrigeration circuit 51 is closed and the pressure regulating defrosting circuit 52 is conducted after the second switching valve 62 and the third switching valve 63 are electrified.

[0099] Based on this, as Figure 11As shown, the refrigerator 100 may further include a first switch 81 and a pressure regulating switch 82. The controller 7 may be connected to the four-way valve 32 through the first switch 81, and the controller 7 may also be connected to the second switching valve 62 and the third switching valve 63 through the pressure regulating switch 82. The first switch 81 and the pressure regulating switch 82 may be set to a normally closed structure.

[0100] After the controller 7 outputs a defrost signal, the first switch 81 receives the defrost signal to control the four-way valve 32 to be powered on and switched to the defrosting condition. The pressure regulating switch 82 receives the defrost signal to control the second switching valve 62 to be powered on and closed, and controls the third switching valve 63 to be powered on and opened, so that the pressure regulating defrosting circuit 52 is conducted and the pressure regulating refrigeration circuit 51 is closed.

[0101] After the controller 7 stops outputting the defrost signal, the first switch 81 and the pressure regulating switch 82 do not receive the defrost signal and control the four-way valve 32, the second switching valve 62 and the third switching valve 63 to be in the default power-off state. That is, the four-way valve 32 in the default state controls the refrigerator 100 to be in the refrigeration condition. The second switching valve 62 is in the normally open state and the third switching valve 63 is in the normally closed state, so that the pressure regulating refrigeration circuit 51 in the refrigeration condition is conducted and the pressure regulating defrosting circuit is closed.

[0102] In addition, the second switching valve 62 and the third switching valve 63 may also be directly electrically connected to the first switch 81 without additionally setting the pressure regulating switch 82. At this time, when the controller 7 adjusts the four-way valve 32 to be in the refrigeration condition through the first switch 81, the pressure regulating refrigeration circuit 51 is synchronously conducted and the pressure regulating defrosting circuit 52 is synchronously closed. When the controller 7 adjusts the four-way valve 32 to be in the defrosting condition through the first switch 81, the pressure regulating defrosting circuit 52 is synchronously conducted and the pressure regulating refrigeration circuit 51 is synchronously closed.

[0103] Or, as Figure 12 shown, the refrigerator 100 may further include a pressure regulating first switch 83 and a pressure regulating second switch 84. The controller 7 is connected to the second switching valve 62 through the pressure regulating first switch 83, and the control 7 is also connected to the third switching valve 63 through the pressure regulating second switch 84. The controller 7 is also connected to the four-way valve 32 through the first switch 81. Thus, while the controller 7 controls the four-way valve 32 to switch between the refrigeration condition and the defrosting condition through the first switch 81, the controller 7 can also separately control the second switching valve 62 and the third switching valve 63 to be opened or closed through the pressure regulating first switch 83 and the pressure regulating second switch 84, so as to separately control the conduction state and the closed state of the pressure regulating refrigeration circuit 51 and the pressure regulating defrosting circuit 52.

[0104] By setting the first pressure-regulating switch 83 and the second pressure-regulating switch 84, the controller 7 can independently control the opening and closing of the second switching valve 62 and the third switching valve 63. In this way, the controller 7 can conduct the corresponding pressure-regulating refrigeration circuit 51 or the pressure-regulating defrosting circuit 52 when needed, and can also close the pressure-regulating circuit 5 as required, and can be flexibly adjusted as needed.

[0105] In some embodiments, as Figure 13 shown, when the controller 7 is connected to the four-way valve 32 through the first switching member 81 and the refrigerator 100 further includes a fourth switching valve 64, the controller 7 can also be electrically connected to the fourth switching valve 64 through the pressure-regulating switch 82. For example, the fourth switching valve 64 can be configured to be in a state of conducting the pressure-regulating refrigeration circuit 51 and closing the pressure-regulating defrosting circuit 52 by default, and when the fourth switching valve 64 is powered on, it will switch to a state of conducting the pressure-regulating defrosting circuit 52 and closing the pressure-regulating refrigeration circuit 51, so that the controller 7 can switch the four-way valve 32 to the defrosting working condition (as Figure 10 shown) by outputting a defrosting signal and conduct the pressure-regulating defrosting circuit 52 and close the pressure-regulating refrigeration circuit 51. When the controller 7 stops outputting the defrosting signal, the four-way valve 64 returns to the refrigeration working condition (as Figure 9 shown) and conducts the pressure-regulating refrigeration circuit 51 and closes the pressure-regulating defrosting circuit 52.

[0106] In some other embodiments, as Figure 14 shown, when the refrigerator 100 includes switching devices such as a four-way valve 32 that can switch between the refrigeration working condition and the defrosting working condition, it is also possible not to set a pressure-regulating defrosting circuit. That is, along the flow direction of the refrigerant, one end of the evaporator 35 close to the pressure reducer 34 can be connected to the airbag 41 through the first switching valve 61 to form a pressure-regulating circuit 5 (which can also be regarded as a pressure-regulating refrigeration circuit). The first switching valve 61 can be a two-position two-way electrically controlled valve to facilitate enabling or disabling the regulating effect of the airbag 41 on the lubricating oil liquid level by opening or closing the first switching valve 61.

[0107] Exemplarily, the controller 7 can be set to be connected to the first switching valve 61 through the pressure-regulating switch 82 to facilitate flexible control of the opening and closing states of the first switching valve 61. For example, when the controller 7 controls the four-way valve 32 to switch to the defrosting working condition, the controller 7 can synchronously control the first switching valve 61 to be in the closed state to prevent the high-pressure refrigerant at the evaporator 35 from causing the volume of the airbag 41 to expand too much, resulting in a relatively high liquid level of the lubricating oil in the machine shell 311, which affects the compression effect of the mechanical main body on the refrigerant.

[0108] In addition, when the refrigerator 100 is in the refrigeration working condition, the controller 7 can also independently control Figure 14 the first switching valve 61 in Figure 7 or Figure 8The second switching valve 62 therein is closed to temporarily terminate the liquid level adjustment effect of the airbag 41 on the lubricating oil.

[0109] In addition, as Figure 14 shown, the refrigerator 100 further includes a balancing member 91, and the balancing member 91 includes a balancing tank 911 and a separating membrane 912. The balancing tank 911 has two ports. One of the ports of the balancing tank 911 is connected to the airbag 41, and the other port of the balancing tank 911 is connected to the pressure regulating circuit 5. The separating membrane 912 is installed inside the balancing tank 911 and between the two ports of the balancing tank 911 for preventing the refrigerant from flowing into the airbag 41.

[0110] Exemplarily, the separating membrane 912 can be a soft film material such as a plastic film or a rubber film, so that when there is a pressure difference on both sides of the separating membrane 912, the local movement or elastic deformation of the separating membrane 912 can be used to change the volume on both sides of the separating membrane 912, thereby balancing the pressure on both sides of the separating membrane. While not affecting the liquid level adjustment effect of the airbag 41 on the lubricating oil, through the setting of the separating member 91, it is possible to prevent the refrigerant from directly flowing into the airbag 41 to avoid the accumulation of the refrigerant in the airbag 41.

[0111] Wherein, when only the airbag 41 and the liquid inlet end of the evaporator 35 under the refrigeration condition are connected at both ends of the pressure regulating circuit 5, the balancing tank 911 can be installed close to the airbag 41, or can be installed close to the evaporator 35, or the two ports of the balancing tank 911 can be connected to the airbag 41 and the liquid inlet end of the evaporator 35 under the refrigeration condition through two sections of the pressure regulating circuit 5.

[0112] When the pressure regulating circuit 5 includes a pressure regulating refrigeration circuit 51 and a pressure regulating defrosting circuit 52, the first end of the balancing tank 911 can be connected to the airbag 41, the second end of the balancing tank 911 is connected to the liquid inlet end of the evaporator 35 under the refrigeration condition through the pressure regulating refrigeration circuit 51, and the second end of the balancing tank 911 is also connected to the liquid inlet end of the condenser 33 under the defrosting condition through the pressure regulating defrosting circuit 52.

[0113] In order to prevent the refrigerant from cooling and accumulating in the balancing tank 911, in terms of spatial position, the balancing tank 911 is at least installed above the evaporator 35, and a port of the balancing tank 911 far from the airbag 41 (i.e., the side port not connected to the airbag 41) is arranged close to the bottom of the balancing tank 911. If the side port of the balancing tank 911 far from the airbag 41 is also connected to the condenser 33, it is also necessary to set the balancing tank 911 to be installed above the condenser 33.

[0114] In this way, even if part of the refrigerant cools and liquefies in the balancing tank 911, the liquefied refrigerant can flow back into the evaporator or the condenser through the side port far from the airbag 41 under the action of gravity, thereby preventing the refrigerant from accumulating in the airbag 41, the balancing member 91 and the pressure regulating circuit 5 and affecting the refrigeration and defrosting effects of the refrigerator 100.

[0115] In some other embodiments, an air pump may also be connected to the airbag 41. At this time, a liquid level sensor may be installed in the machine housing 311. Both the liquid level sensor and the air pump are connected to the controller 7. The controller 7 can monitor the liquid level height of the lubricating oil in the machine housing 311 and can adjust the volume of the airbag 41 through the air pump, so that the liquid level height of the lubricating oil in the machine housing 311 is maintained within an appropriate range, so as to avoid too much or too little lubricating oil sucked by the mechanical main body 312.

[0116] Alternatively, the adjusting member 4 may also include a box-shaped structure or a box-type structure whose volume is adjusted by air pressure for replacing the airbag 41, and no limitation is made thereto.

[0117] In some other embodiments, the adjusting member 4 may also include a machine cavity member. The machine cavity member is installed at the lower part inside the machine housing 311 and encloses a chamber for accommodating lubricating oil with the machine housing 311. The machine cavity member can be configured to adjust the volume of the lubricating oil chamber (such as the cross-sectional area perpendicular to the up and down direction) through pressure or motor drive. In this way, the controller 7 can be connected to the machine cavity member through the air pump or the motor, and under the monitoring of the liquid level sensor, the liquid level height of the lubricating oil in the machine housing 311 can be adjusted by controlling the machine cavity member, so as to control the suction speed of the mechanical main body 312 for the lubricating oil, so as to avoid too much or too little lubricating oil sucked by the mechanical main body 312.

[0118] For the refrigerator 100, taking Figure 3 the shown refrigeration working condition as an example, after the temperature in the storage cavity 11 reaches the preset temperature, the compressor 31 will stop running, and the compressor 31 will be restarted after the temperature in the storage cavity 11 rises or the shutdown reaches the preset time. After the compressor 31 stops running, due to the low temperature in the air duct or the storage cavity 11, the refrigerant in the evaporator 35 will not absorb heat and vaporize sufficiently. When the compressor 31 starts again instantaneously, a large pressure will suck the liquid refrigerant in the evaporator 35 into the machine housing 311 from the suction end of the compressor 31.

[0119] When the refrigerator 100 is in Figure 4 the shown defrosting working condition, in the case of a low ambient temperature, when the compressor 31 stops running, there will also be some liquid refrigerant that has not been vaporized sufficiently remaining in the condenser 33. When the compressor 31 starts again instantaneously, a large pressure will suck the liquid refrigerant in the condenser 33 into the machine housing 311 from the suction end of the compressor 31 as shown in the figure.

[0120] Since the temperature of the liquid refrigerant flowing into the casing 311 is extremely low, especially when the ambient temperature is low and the compressor 31 that has stopped cannot provide the frictional heat generated by mechanical rotation, it is difficult for the liquid refrigerant to absorb heat and vaporize sufficiently within the casing 311. That is, a large amount of liquid refrigerant accumulates in the casing 311 and mixes with the lubricating oil. When the compressor 31 is operating, while the mechanical main body 312 sucks the lubricating oil in the casing 311 for lubrication, it also inhales the liquid refrigerant that has no lubricating effect. The mixed liquid refrigerant will cause excessive wear of the mechanical main body 312 due to insufficient lubrication, that is, the service life of the compressor 31 is reduced and its reliability is decreased.

[0121] Based on this, as Figure 15 shown, the refrigerator 100 may further include a heating element 92. The heating element 92 is located within the casing 311 and is configured to: start the heating element 92 and heat the lubricating oil within the casing 311 to reduce the content of the liquid refrigerant mixed in the lubricating oil.

[0122] In this way, by starting the heating element 92, the lubricating oil within the casing can be preheated, or the refrigerant mixed in the lubricating oil can directly absorb the heat released by the heating element to vaporize, thereby reducing or removing the liquid refrigerant mixed in the lubricating oil. In this way, it is possible to avoid the situation where the lubricating oil drawn from the casing 311 by the mechanical main body 312 when the compressor 31 is restarted is mixed with liquid refrigerant, avoid the liquid refrigerant from mixing into the mechanical main body 312 to increase the wear degree of the mechanical main body 312 and avoid the occurrence of liquid hammer, which is beneficial to increasing the service life of the compressor 31 and improving its operating stability.

[0123] In some embodiments, as Figure 16 shown, the refrigerator 100 includes a first temperature sensor 93, a temperature control module 71, and a second switch member 85. The first temperature sensor 93 is connected to the temperature control module 71 so that the temperature control module 71 can detect the ambient temperature through the first temperature sensor 93. The temperature control module 71 is electrically connected to the heating element 92 through the second switch member 85 and is configured to: when the ambient temperature is lower than a first preset temperature, the temperature control module 71 controls the second switch member 85 to start the heating element 92.

[0124] When the compressor 31 stops operating and the ambient temperature is lower than the first preset temperature, after the liquid refrigerant that has not been fully vaporized in the evaporator 35 or the condenser 33 flows into the housing 311 of the compressor 31, due to the low ambient temperature, this part of the gaseous refrigerant cannot absorb heat and vaporize sufficiently within the housing 311. Based on this, when the ambient temperature decreases, the heating element 92 is activated so that the heating element 92 can preheat the lubricating oil within the housing 311 or directly heat the mixed liquid refrigerant, enabling the liquid refrigerant sucked into the compressor 31 to absorb heat and vaporize partially or fully, thereby avoiding mechanical wear and liquid hammer caused by the mechanical body 312 sucking in liquid refrigerant during operation.

[0125] Continuing to refer to Figure 16 , the refrigerator 100 may further include a third switch member 86 and a delay control module 72. The second switch member 85 is electrically connected to the heating element 92 through the delay control module 72 and the third switch member 86 in sequence. The above structure is configured such that when the ambient temperature is lower than the first preset temperature, the temperature control module 71 activates the heating element 92 through the second switch member 85, the delay control module 72, and the third switch member 86 in sequence for heating the lubricating oil. When the heating element 92 has been activated for a preset duration, the delay control module 72 turns off the heating element 92 through the third switch member 86.

[0126] Exemplarily, the power of the heating element 92 can be 5 - 10 W, such as 5 W, 6 W, 7 W, 8 W, 9 W, or 10 W. Correspondingly, the preset duration can be 5 - 8 min, such as 5 min, 6 min, 7 min, or 8 min.

[0127] Since the compressor 31 of the household refrigerator 100 has a relatively small power and the corresponding amount of refrigerant filled is also small, by setting the power of the heating element 92 to 5 - 10 W and the preset duration to 5 - 8 min, the heating element 92 can heat the lubricating oil within the housing 311 sufficiently, enabling the subsequent inflowing liquid refrigerant to absorb the heat of the heated lubricating oil and vaporize fully, thereby avoiding the liquid refrigerant being sucked in by the mechanical body 312.

[0128] Exemplarily, through the above configuration, the temperature of the lubricating oil can be heated to a preset temperature that is at least 7°C higher than the ambient temperature.

[0129] Since the shutdown duration of the compressor 31 of the refrigerator 100 is generally 5 - 10 minutes, by configuring the power of the heating element 92 and the heating time of the above preset duration, it just matches the shutdown duration of the compressor 31. However, if the power of the heating element 92 is too small (such as less than 5 W), it will cause the startup time of the heating element 92 to be too long, and even the situation where the heating element 92 cannot heat up to the preset temperature may occur due to its too small power.

[0130] In addition, it is also possible to configure to increase the power of the heating element 92 so as to make the preset duration shorter, and this is not limited herein.

[0131] Exemplarily, the heating element 92 can be a metal electrothermal element or a non-metal electrothermal element. The non-metal electrothermal element can include: silicon carbide, silicon molybdenum rod, PTC (Positive Temperature Coefficient) electrothermal element, electrothermal coating, etc. The metal electrothermal element can include: nickel-chromium wire (Ni-Cr), iron-chromium-aluminum wire (Fe-Cr-Al), nickel-iron wire (Ni-Fe), nickel-copper wire (Ni-Cu), etc.

[0132] In Figure 15 In the shown housing 311, in the up-down direction, the heating element 92 can be arranged close to the bottom of the housing 311, and the heating element 92 is immersed in the lubricating oil. In this way, due to thermal expansion and contraction, the volume of the heated lubricating oil expands and flows upward. By arranging the heating element 92 at the lower part of the housing 311, it is beneficial to improve the uniformity of the lubricating oil being heated.

[0133] In some embodiments, as Figure 17 shown, the refrigerator 100 further includes a fourth switch member 87. The fourth switch member 87 can have a signal terminal, an input terminal, and an output terminal. Its input terminal is used to connect to the power supply for starting the compressor 31. The heating element 92 can be arranged in parallel with the signal terminal and electrically connected to the third switch member 86, and the output terminal of the fourth switch member 87 is electrically connected to the compressor 31 for controlling the start or stop of the compressor 31.

[0134] The fourth switch member 87 is configured such that when the third switch member 86 starts the heating element 92, the fourth switch member 87 controls the disconnection between the input terminal and the output terminal. When the third switch member 86 turns off the heating element 92, the fourth switch member 87 controls the conduction between the input terminal and the output terminal.

[0135] Exemplarily, the third switch member 86 and the third switch member can be configured as normally open structures. When the power supply is connected to the input terminal of the fourth switch member 87. After the third switch member 86 turns off the heating element 92, the fourth switch member 87 can start the compressor 31 through the conducting input terminal and output terminal.

[0136] A delay start module can also be provided between the compressor 31 and the fourth switch member 87 so that the compressor 31 starts within 1 - 5 minutes after the heating element 92 is turned off. Through the above settings, the compressor 31 is configured to start after the heating element 92 preheats the lubricating oil, so as to avoid excessive wear caused by premature start of the compressor 31.

[0137] Continue to refer to Figure 17, the refrigerator 100 may further include a fifth switch member 88. The input end of the fourth switch member 87 is arranged in parallel with the temperature control module 71 and is connected to the fifth switch member 88. When the fifth switch member 88 controls the input end to be powered on for starting the compressor 31, the temperature control module 71 is synchronously powered on and started to detect the ambient temperature through the first temperature sensor 93, and control the heating member 92 to be turned on or off according to the ambient temperature through the second switch member 85, the delay control module 72 and the third switch member 86.

[0138] Exemplarily, the controller 7 may be electrically connected to the temperature control module 71 as shown in Figure 16 for controlling the temperature control module 71 to be turned on or off. Alternatively, the controller 7 may also be connected to the temperature control module 71 through the fifth switch member 88 as shown in Figure 17 . At this time, the controller 7 may control the temperature control module 71 to be powered on or off to control the turning on and off of the temperature control module 71.

[0139] As shown in Figure 17 , when the controller 7 issues a signal to make the fifth switch member 88 turn on the power supply of the temperature control module 71 and the fourth switch member 87, the compressor 31 can be in an on state under the power-on control of the fourth switch member 87 in the normally open state. At this time, the temperature control module 71 synchronously detects the ambient temperature. When the ambient temperature is higher than the first preset temperature, the temperature control module 71 does not start the heating member 92 to keep the compressor 31 in an on state. If the ambient temperature is lower than the first preset temperature, during the process of the temperature control module 71 turning on the heating member 92 through the third switch member 86, the compressor 31 is synchronously in an off state.

[0140] It should be noted that since the fourth switch member 87 will control the compressor 31 to start instantly when powered on, but if the temperature control module 71 needs to start the heating member 92, it will turn off the started compressor 31. Based on this, a delay compression control module and a sixth switch member can be installed between the fourth switch member 87 and the fifth switch member 88 or between the fourth switch member 87 and the compressor 31 to start the compressor 31 with a delay of 1 - 5 minutes through the delay compression control module and the sixth switch member, so as to avoid the frequent power-on start of the compressor 31 under the above conditions.

[0141] As shown in Figure 16 and Figure 17 , the controller 7 can separately control the four-way valve 32 to switch and adjust between the refrigeration mode and the defrosting mode through the first switch member 81. Correspondingly, the controller 7 can also adjust and control the on and off states of the heating member 92 through the temperature control module 71, the second switch member 85, the delay control module 72 and the third switch member 86, that is, control the turning-off timing of the heating member 92 by setting a preset duration.

[0142] In some other embodiments, as shown in Figure 18As shown, the refrigerator 100 further includes a second temperature sensor 94, and the second temperature sensor 94 is installed in the Figure 15 shown housing 311 and is in contact with the lubricating oil. The temperature control module 71 is also connected to the second temperature sensor 94 for detecting the temperature of the lubricating oil, and the temperature control module 71 can be directly connected to the heating element 92 through the second switch 85.

[0143] Based on this, the temperature control module 71 is configured such that when the temperature of the lubricating oil is greater than or equal to the second preset temperature, the temperature control module 71 controls the heating element 92 to turn off through the second switch 85, and the second preset temperature can be set higher than the first preset temperature. In this way, the heating element 92 can be turned off after the lubricating oil is heated to the second preset temperature, while ensuring the vaporization effect of the subsequent flowing liquid refrigerant, and the heating element 92 can be turned off in time, saving energy and being environmentally friendly.

[0144] In some embodiments, based on the second preset temperature being higher than the first preset temperature, the temperature difference between the second preset temperature and the first preset temperature can be set to be greater than or equal to 7°C, so that the heated lubricating oil can absorb enough heat to fully vaporize the mixed liquid refrigerant.

[0145] Exemplarily, the first preset temperature can be 15 - 17°C, for example, the first preset temperature can be 15°C, 16°C or 17°C. If the first preset temperature is less than 15°C, the heating element 92 cannot be started at a lower ambient temperature, thereby reducing the service life and operating stability of the compressor 31. If the first preset temperature is greater than 17°C, the heating element 92 will be started at a higher ambient temperature, consuming electricity.

[0146] At this time, for the temperature control module 71, the first preset temperature can be the upper critical point of its starting temperature. Correspondingly, the second preset temperature can be the lower critical point of the stopping temperature of the temperature control module 71.

[0147] Alternatively, the second preset temperature can also be set to be lower than or equal to the first preset temperature. Exemplarily, it can be defined that the second preset temperature is at least 7°C higher than the ambient temperature detected by the first temperature sensor 94. Since the ambient temperature may be more than 7°C lower than the first preset temperature, that is, the second preset temperature may be lower than the first preset temperature at this time.

[0148] In Figure 18 the shown solution, the controller 7 can also separately control the four-way valve 32 to switch and adjust between the refrigeration mode and the defrosting mode through the first switch 81. If it is necessary to add Figure 17 the shown fourth switch 87 and fifth switch 88, the signal terminal of the fourth switch 87 needs to be connected in parallel with the heating element 92 and connected to the second switch 85, so as to avoid the simultaneous start of the compressor 31 and the heating element 92.

[0149] It should be noted that the first switch 81, the voltage regulating switch 82, the first voltage regulating switch 83, the second voltage regulating switch 84, the second switch 85, the third switch 86, the fourth switch 87, the fifth switch 88, and the sixth switch can be relay structures, triodes, or MOS (Metal Oxide Semiconductor) transistors, that is, an electrically controlled switch that can control whether a component is powered on through a current signal or a voltage signal.

[0150] Among them, when the controller 7 is an integrated circuit structure, the temperature control module 71, the delay control module 72, and the delay compression control module can also be configured as part of the functional modules of the controller 7, and the corresponding control of the electrically controlled switch can be achieved through a preset function program. The corresponding first switch 81, voltage regulating switch 82, first voltage regulating switch 83, second voltage regulating switch 84, second switch 85, third switch 86, fourth switch 87, fifth switch 88, and sixth switch can all be regarded as part of the integrated circuit structure of the controller 7, so that the controller 7 can be directly connected to at least one of the compressor 31, the four-way valve 32, and the heating element 92 for control, and this is not limited.

[0151] In addition, the temperature control module 71 and the second switch 85 can also be an integrated component, that is, a common thermostat (i.e., a temperature control relay), which is used to start or close a component through upper limit temperature and / or lower limit temperature control. Correspondingly, the delay control module 72 and the third switch 86, as well as the delay compression control module and the sixth switch, can be delay relay structures, that is, they can delay the opening or closing of the corresponding components.

[0152] In some embodiments, as Figure 15 and Figure 19 shown, the heating element 92 can be applied to a single-cooling structure refrigerator 100, so that the refrigerant circulates sequentially between the compressor 31, the condenser 33, the pressure reducer 34, the evaporator 35, and the compressor 31, and the storage cavity 11 (as Figure 1 shown) can be cooled down by the evaporator 35 for refrigeration. Since the mechanical body 312 of the compressor 31 will frequently start and stop during the refrigeration process of the refrigerator 100, by installing the heating element 92 in the housing 311, the lubricating oil in the housing 311 can be preheated during the process of the mechanical body 312 stopping, which is used to make the liquid refrigerant sucked into the housing 311 absorb heat quickly and vaporize.

[0153] In addition, as Figure 15 and Figure 20As shown, the heating element 92 can also be applied in the dual-mode refrigerator 100. At this time, the refrigerator 100 can be switched and adjusted between the refrigeration mode and the defrosting mode through the four-way valve 32. Since the mechanical body 312 of the compressor 31 also starts and stops frequently in the refrigeration mode and the defrosting mode, by setting the heating element 92, the lubricating oil in the casing 311 can also be preheated during the shutdown process of the mechanical body 312, so as to quickly absorb heat and vaporize the liquid refrigerant sucked into the casing 311.

[0154] In the description of this specification, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0155] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A refrigerator equipped with a compressor, characterized in that, Comprising: A compressor, comprising: A housing containing lubricating oil inside, and the housing is provided with a suction end for sucking refrigerant; And a mechanical main body installed inside the housing and used for compressing gaseous refrigerant, and the mechanical main body has an exhaust end for discharging the compressed refrigerant; And a regulating member, including an airbag, and at least part of the airbag is immersed in the lubricating oil; the airbag is configured to: Adjust the liquid level height of the lubricating oil in the housing by controlling the volume of the airbag, so as to control the suction speed of the mechanical main body for the lubricating oil.

2. The refrigerator provided with a compressor according to claim 1, characterized in that, The refrigerator provided with the compressor includes: A condenser, one end of the condenser is connected to the exhaust end; A pressure reducer; An evaporator, one end of the evaporator is connected to the suction end, and the other end of the evaporator is connected to the other end of the condenser through the pressure reducer; And a pressure regulating circuit, along the flowing direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected and conducted with the airbag through the pressure regulating circuit.

3. The refrigerator provided with a compressor according to claim 2, characterized in that, The refrigerator provided with the compressor includes: A first switching valve, the first switching valve is a two-position two-way electrically controlled valve, along the flowing direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the airbag through the first switching valve to form the pressure regulating circuit; Wherein, the first switching valve is used to control the pressure regulating circuit to be in a conducting state or a closed state.

4. The refrigerator provided with a compressor according to claim 1, characterized in that, The refrigerator provided with the compressor includes: A four-way valve, the four-way valve has a first port, a second port, a third port and a fourth port, the first port is connected to the suction end, and the second port is connected to the exhaust end; A condenser, one end of the condenser is connected to the third port; A pressure reducer; An evaporator, one end of the evaporator is connected to the fourth port, and the other end of the evaporator is connected to the other end of the condenser through the pressure reducer; And a pressure regulating circuit, the pressure regulating circuit includes a pressure regulating refrigeration circuit and a pressure regulating defrosting circuit; along the flowing direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the airbag through the pressure regulating refrigeration circuit, and one end of the condenser close to the pressure reducer is connected to the airbag through the pressure regulating defrosting circuit; The first port and the fourth port are conducted, and the second port and the third port are conducted, so that the evaporator is in a refrigeration working condition, the pressure regulating refrigeration circuit is conducted and the pressure regulating defrosting circuit is closed; The first port and the third port are conducted, and the second port and the fourth port are conducted, so that the evaporator is in a defrosting working condition, the pressure regulating refrigeration circuit is closed and the pressure regulating defrosting circuit is conducted.

5. The refrigerator provided with a compressor according to claim 4, characterized in that, The refrigerator provided with the compressor includes: A second switching valve, the second switching valve is a two-position two-way electrically controlled valve, along the flowing direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the airbag through the second switching valve to form the pressure regulating refrigeration circuit; And a third switching valve, the third switching valve is a two-position two-way electrically controlled valve, along the flowing direction of the refrigerant, one end of the condenser close to the pressure reducer is connected to the airbag through the third switching valve to form the pressure regulating defrosting circuit.

6. The refrigerator provided with a compressor according to claim 5, characterized in that, The refrigerator provided with a compressor includes: A controller, electrically connected to the four-way valve, the second switching valve, and the third switching valve; The controller adjusts the four-way valve to be in the refrigeration mode, and the controller controls the second switching valve to open and the third switching valve to close; or, The controller adjusts the four-way valve to be in the defrosting mode, and the controller controls the second switching valve to close and the third switching valve to open.

7. The refrigerator provided with a compressor according to claim 4, characterized in that, The refrigerator provided with a compressor includes: A fourth switching valve, which is a two-position three-way electrically controlled valve, with the first end of the fourth switching valve connected to the airbag; along the flow direction of the refrigerant, one end of the evaporator close to the pressure reducer is connected to the second end of the fourth switching valve to form the pressure-regulating refrigeration circuit, and one end of the condenser close to the pressure reducer is connected to the third end of the fourth switching valve to form the pressure-regulating defrosting circuit.

8. The refrigerator provided with a compressor according to any one of claims 2 to 4, characterized in that, The refrigerator provided with a compressor further includes a balancing member, and the balancing member includes: A balancing tank, which has two ports, one port of the balancing tank is connected to the airbag, and the other port of the balancing tank is connected to the pressure-regulating circuit; And a separating membrane, which is installed inside the balancing tank and located between the two ports of the balancing tank, and is used to prevent the refrigerant from flowing into the airbag.

9. The refrigerator provided with a compressor according to claim 8, characterized in that, The balancing tank is at least installed above the evaporator, and one port of the balancing tank far from the airbag is arranged close to the bottom of the balancing tank.

10. A refrigerator provided with a compressor, characterized in that Includes: A compressor, and the compressor includes: A housing, which is provided with a suction end and contains lubricating oil inside; And a mechanical main body, installed inside the housing and used to compress the gaseous refrigerant, and the mechanical main body has an exhaust end for discharging the compressed refrigerant; And an adjusting member, which is installed inside the housing and is configured to: Adjust the liquid level height of the lubricating oil in the housing by controlling the volume of the adjusting member, and is used to control the suction speed of the mechanical main body for the lubricating oil.

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