Refrigerating system and refrigerating equipment

Abstract

The invention relates to the technical field of refrigeration, and discloses a refrigeration system which comprises a compressor, a condenser, a throttling part and an evaporator which are sequentially connected to form a refrigerant flow path. The refrigerant flow path is filled with the mixed working medium; the inlet end of the throttling part is communicated with the outlet end of the condenser, and the outlet end of the throttling part is communicated with the inlet end of the evaporator; wherein the mixed working medium comprises at least 20%-50% by mass of propane and at least 50%-80% by mass of isobutane. The embodiment of the invention can adapt to an ultralow-temperature operating environment, has consistency and stability, reduces the failure rate, and stably controls the temperature. The invention further discloses the refrigeration equipment.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, for example, to a refrigeration system and a refrigeration device. Background Art

[0002] At present, air-cooled refrigeration systems or products, such as refrigerators and freezers, generally use R600a or R290 single-phase refrigerants. For multiple storage rooms with ultra-low temperatures of -40°C, a motor is used to control the opening and closing of the dampers, thereby controlling the flow of cold air between different storage rooms.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] In the related art, the use of R600a working fluid consumes less power, but the lowest temperature inside the box can only reach about -30°C. The use of R290 working fluid in the refrigerator has a lower temperature depth, but it is noisy and consumes more power, which does not meet the requirements of low noise and low power consumption.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiment of the present disclosure provides a refrigeration system, so that the refrigeration system adopts a mixed refrigerant according to a certain ratio, which can expand the refrigeration temperature range and reduce noise and power consumption indicators.

[0008] In some embodiments, the refrigeration system comprises:

[0009] A compressor, a condenser, a throttling part and an evaporator are sequentially connected to form a refrigerant flow path;

[0010] The mixed working fluid is filled into the refrigerant flow path;

[0011] The inlet end of the throttling section is connected to the outlet end of the condenser and the outlet end of the throttling section is connected to the inlet end of the evaporator;

[0012] The mixed working fluid contains: at least 20%-50% by mass of propane and at least 50%-80% by mass of isobutane.

[0013] The refrigeration system and refrigeration equipment provided by the embodiments of the present disclosure can achieve the following technical effects:

[0014] The refrigeration system provided by the embodiment of the present disclosure is based on a compressor, a condenser, a throttling part and an evaporator connected in sequence to form a refrigerant flow path, and the refrigerant flow path is filled with a mixed working fluid, and the mixed working fluid contains at least 20%-50% by mass of R290 propane and at least 50%-80% by mass of R600a isobutane. The refrigerant of the mixed working fluid can improve the deep cold refrigeration performance of the refrigeration system, make the refrigeration temperature range of the refrigeration system wider, and effectively improve the power consumption and noise indicators. The embodiment of the present disclosure can adapt to the ultra-low temperature operating environment, thereby improving the accuracy of temperature control in the storage room.

[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0017] Figure 1 is a schematic diagram of a refrigeration system provided by an embodiment of the present disclosure;

[0018] Figure 2 is a schematic structural diagram of a cylinder head gasket of a compressor of a refrigeration system provided by an embodiment of the present disclosure;

[0019] Figure 3 is a partial cross-sectional view of a compressor crankshaft of a refrigeration system provided by an embodiment of the present disclosure;

[0020] Figure 4 is a structural schematic diagram of a refrigeration system provided by an embodiment of the present disclosure;

[0021] Figure 5 is a schematic structural diagram of a driving device for controlling a damper provided in an embodiment of the present disclosure at an angle;

[0022] Figure 6 yes Figure 5 FIG. 1 is a schematic structural diagram of a driving device for controlling a damper provided in an embodiment of the present disclosure from another angle;

[0023] Figure 7 It is a structural schematic diagram of a driving device for controlling a damper provided in an embodiment of the present disclosure driving the damper to be in a half-open state;

[0024] Figure 8 It is a structural schematic diagram of a driving device for controlling a damper provided in an embodiment of the present disclosure driving the damper to be fully opened;

[0025] Fig. 9It is a structural schematic diagram of a driving device for controlling a damper provided in an embodiment of the present disclosure driving the damper to be fully closed;

[0026] Fig.10 yes Figure 5 A partial structural side view of a driving device for controlling a damper provided in the illustrated embodiment;

[0027] Fig.11 yes Figure 5 Another partial structural side view of a driving device for controlling a damper provided by the illustrated embodiment;

[0028] Fig.12 yes Figure 5 The illustrated embodiment is a partial structural cross-sectional view of a driving device for controlling a damper.

[0029] Reference numerals:

[0030] 10: compressor; 11: crankshaft; 111: bypass channel; 112: main channel; 12: cylinder head gasket;

[0031] 20: condenser;

[0032] 30: throttling part; 31: first capillary tube; 32: second capillary tube; 33: solenoid valve;

[0033] 40: evaporator;

[0034] 50: Storage room;

[0035] 60: Refrigeration air duct;

[0036] 70: air door;

[0037] 80: driving device; 81: driving member; 811: cavity; 812: mixed working medium; 813: temperature sensing device; 8131: first inner cavity; 814: lifting device; 8141: second inner cavity; 8142: fixed end; 8143: moving end; 82: transmission mechanism; 2a: input end; 2b: output end; 83: adjustment mechanism; 90: drying filter. DETAILED DESCRIPTION

[0038] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0039] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0041] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0042] Unless otherwise stated, the term "plurality" means two or more.

[0043] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0044] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0046] At present, air-cooled refrigeration systems or products, such as refrigerators and freezers, generally use R600a or R290 single-substance refrigerants. If an air-cooled refrigeration system or product uses R600a single-substance refrigerant, it consumes less power, but the lowest temperature inside the box can only be cooled to about -30°C. If an air-cooled refrigeration system or product uses R290 single-substance refrigerant, although it can have a lower temperature pull depth, it will also generate greater noise and power consumption. Therefore, the above two solutions do not meet the user's comprehensive needs for low noise and low power consumption of air-cooled refrigeration systems or products.

[0047] Combination Figure 1 As shown, an embodiment of the present disclosure provides a refrigeration system, including a compressor 10, a condenser 20, a throttling portion 30, an evaporator 40 and a mixed working medium.

[0048] The compressor 10, the condenser 20, the throttling part 30, and the evaporator 40 are connected in sequence to form a refrigerant flow path. The refrigerant flow path is filled with a mixed working medium. The mixed working medium continuously circulates in the refrigerant flow path to complete the heat exchange process, thereby enabling the refrigeration system to complete the refrigeration process.

[0049] The inlet end of the throttling portion 30 is connected to the outlet end of the condenser 20, and the outlet end of the throttling portion 30 is connected to the inlet end of the evaporator 40. The throttling portion 30 includes a first capillary tube 31 and a second capillary tube 32 arranged in parallel, and the inlet ends of the first capillary tube 31 and the second capillary tube 32 are both connected to the outlet end of the condenser 20, and the outlet ends of the first capillary tube 31 and the second capillary tube 32 are both connected to the inlet end of the evaporator 40. The double capillary design of the throttling portion 30 including the first capillary tube 31 and the second capillary tube 32 can effectively improve the starting performance of the compressor 10 of the refrigeration system under high ambient temperature and high load, and ensure the refrigeration effect of the refrigeration system.

[0050] The throttling part 30 further includes a solenoid valve 33, the inlet end of the solenoid valve 33 is connected to the outlet end of the condenser 20, and the inlet ends of the first capillary tube 31 and the second capillary tube 32 are respectively connected to the two outlet ends of the solenoid valve 33. The solenoid valve 33 can be a three-way solenoid valve 33, having an inlet end and two outlet ends. The solenoid valve 33 can control the opening of the first capillary tube 31 and / or the second capillary tube 32 to effectively control the flow rate of the mixed working medium in the refrigeration system.

[0051] The inlet end of the compressor 10 is communicated with the outlet end of the evaporator 40 , and the outlet end of the compressor 10 is communicated with the inlet end of the condenser 20 .

[0052] A drying filter 90 is connected between the outlet end of the condenser 20 and the inlet end of the throttling part 30. The drying filter 90 is used to absorb excess moisture in the refrigerant flow path to prevent ice blockage and reduce the corrosion of the water to the pipes in the refrigerant flow path. It also filters out impurities in the pipes in the refrigerant flow path, such as dust, metal chips and various oxides, to prevent impurities from entering the compressor 10 and causing failures.

[0053] The mixed working fluid contains: at least 20%-50% by mass of R290 propane and at least 50%-80% by mass of R600a isobutane.

[0054] In the refrigeration system provided by the embodiment of the present disclosure, the mixed working fluid in the refrigerant flow path is formed by mixing R290 refrigerant and R600a refrigerant according to a certain mass percentage. Although the power consumption of the traditional refrigeration system using R600a single working fluid refrigeration is small, the lowest temperature in the box can only reach about -30°C. Although the temperature pulling depth of the traditional refrigeration system using R290 working fluid is lower, the noise and power consumption are greater. Compared with the R290 single working fluid refrigeration, the pressure required for the refrigeration system is reduced, thereby reducing the overall noise of the refrigeration system. At the same time, the exhaust pressure of the refrigeration system is also reduced synchronously, the pressure ratio of the refrigeration system is reduced, and the starting performance of the compressor 10 is improved. At the same time, the starting torque of the compressor 10 can also be reduced accordingly, and the power consumption of the whole machine is improved. Similarly, compared with the R600a single working fluid system, because the mixed working fluid adds a certain proportion of R290 refrigerant, the refrigeration capacity can be increased, and thus -40°C low-temperature refrigeration can be achieved.

[0055] In summary, the mixed working fluid in the refrigeration system of the embodiment of the present disclosure adopts R290 refrigerant and R600a refrigerant mixed in a certain mass percentage, which achieves quick freezing and low-temperature refrigeration performance while also effectively improving power consumption and noise indicators.

[0056] In another embodiment of the present disclosure, R290 refrigerant and R600a refrigerant are taken, and in a liquid phase, 20% by mass of R290 refrigerant and 80% by mass of R600a refrigerant are fully physically mixed to obtain a mixed working fluid.

[0057] In another embodiment of the present disclosure, R290 refrigerant and R600a refrigerant are taken, and in a liquid state, 50% by mass of R290 refrigerant and 50% by mass of R600a refrigerant are fully physically mixed to obtain a mixed working fluid.

[0058] In another embodiment of the present disclosure, R290 refrigerant and R600a refrigerant are taken, and in a liquid state, 35% by mass of R290 refrigerant and 65% by mass of R600a refrigerant are fully physically mixed to obtain a mixed working fluid.

[0059] Optionally, the flow rate range of the first capillary tube 31 includes: 4L / min to 5.5L / min; and / or the flow rate range of the second capillary tube 32 includes: 9L / min to 11L / min. Specifically, according to the actual application of the refrigeration system, the flow rate ranges of the first capillary tube 31 and the second capillary tube 32 are designed to flexibly control the flow rate of the mixed working medium in the refrigeration system.

[0060] Combination Figure 2 As shown, optionally, the compressor 10 includes a motor, a crankshaft 11 and a cylinder.

[0061] The crankshaft 11 connects the motor and the cylinder, and includes a branch channel 111 and a main channel 112 , wherein the main channel 112 has a three-stage stepped structure.

[0062] Specifically, the branch channel 111 of the crankshaft 11 is used to connect with the cylinder, one end of the main channel 112 is connected with the branch channel 111, and the other end of the main channel 112 has a distribution angle. The main channel 112 has a three-stage stepped structure, that is, the main channel 112 is at least a three-stage telescopic structure.

[0063] Combination Figure 3 As shown, optionally, the crankshaft 11 includes a distribution angle less than or equal to 60°. Specifically, the distance of the A portion of the crankshaft 11 is [60, 65] mm, the distance of the B portion is [40, 45] mm, the distance of the C portion is [38, 42] mm, the distance of the D portion is [20, 25] mm, and the distance of the E portion is [10, 16] mm, and the distribution angle F is less than or equal to 60°. More specifically, the distance of the A portion of the crankshaft 11 is 63.5 mm, the distance of the B portion is 42.4 mm, the distance of the C portion is 41.4 mm, the distance of the D portion is 23.5 mm, and the distance of the E portion is 13.5 mm, and the distribution angle F is less than or equal to 60°.

[0064] In the related art, the parameters of the compressor crankshaft used in a conventional refrigeration system using a single refrigerant R600a are: the distance of part A is 62mm, the distance of part B is 38mm, the distance of part C is 7mm, the distance of part D is 22mm, the distance of part E is 12mm, and the distribution angle F is equal to 120°.

[0065] Compared with the crankshaft of a conventional compressor, the present invention Figure 3 The structural strength of the crankshaft 11 of the compressor 10 shown in FIG. 1 is improved by at least 50%.

[0066] Optionally, the compressor 10 uses RL22H brand refrigeration oil. Specifically, high-grade ester oil is selected to meet the anti-friction and thermal stability of the refrigeration oil under high exhaust temperature and high exhaust pressure conditions of the embodiment of the present disclosure.

[0067] Optionally, the compressor 10 further includes an air intake valve plate, and the thickness of the air intake valve plate is greater than or equal to 0.17 mm. Specifically, in the related art, the thickness of the air intake valve plate used in the compressor of the refrigeration system using the single refrigerant R600a is generally 0.15 mm. The embodiment of the present disclosure increases the thickness of the air intake valve plate to greater than or equal to 0.17 mm, effectively improving the impact resistance and fatigue resistance of the air intake valve plate.

[0068] Optionally, the compressor 10 further includes a cylinder head gasket 12, which is made of a mixed material of metal and nylon. Specifically, in the related art, the cylinder head gasket used in the compressor of the refrigeration system using the single refrigerant R600a is usually made of nylon. The cylinder head gasket 12 of the disclosed embodiment is made of a mixed material of metal and nylon, which better meets the sealing performance and reliability of the cylinder head gasket 12 of the disclosed embodiment under high exhaust pressure and high exhaust temperature.

[0069] Optionally, combined Figure 4 As shown, the refrigeration system of the embodiment of the present disclosure further includes a storage chamber 50 , a refrigeration air duct 60 , a damper 70 , and a driving device 80 .

[0070] The cooling air duct 60 is connected to the storage chamber 50. The damper 70 is disposed in the cooling air duct 60. The driving device 80 is used to drive the damper 70 to open or close the cooling air duct 60.

[0071] Combination Figures 5 and 6 , Fig.12 As shown, the driving device 80 includes a driving member 81 and a transmission mechanism 82 .

[0072] The driving member 81 includes a cavity 811 and a mixed working medium 812 filled in the cavity 811. One end of the driving member 81 is used to sense the temperature. The pressure of the mixed working medium 812 is proportional to the temperature. The mixed working medium 812 in the driving member 81 and the mixed working medium in the refrigeration system do not belong to the same system. The mixed working medium 812 in the driving member 81 does not participate in refrigeration. The mixed working medium 812 in the driving member 81 only senses the temperature change of the storage chamber 50.

[0073] Optionally, the formula of the mixed working fluid 812 is consistent with the mixed working fluid. That is, the mixed working fluid 812 contains: at least 20%-50% by mass of R290 propane and at least 50%-80% by mass of R600a isobutane.

[0074] The transmission mechanism 82 has an input end 2 a connected to the other end of the driving member 81 , and an output end 2 b of the transmission mechanism 82 is used to be connected to the damper 70 .

[0075] Under the action of the pressure of the internal mixed working medium 812 , the driving member 81 drives the transmission mechanism 82 to move, thereby driving the damper 70 to rotate.

[0076] Combination Figures 7 to 9 , Fig.12 As shown, the driving member 81 includes a cavity 811 and a mixed working fluid 812 filled in the cavity 811. One end of the driving member 81 is used to sense the temperature, and the pressure of the mixed working fluid 812 is proportional to the temperature. Specifically, one end of the driving member 81 senses the temperature in the storage chamber 50, and then the state of the mixed working fluid 812 in the cavity 811 of the driving member 81 changes according to the change in temperature. If one end of the driving member 81 senses that the temperature in the storage chamber 50 is high, the mixed working fluid 812 expands in volume due to thermal expansion and contraction, and the pressure of the expanded mixed working fluid 812 on the cavity 811 increases. If one end of the driving member 81 senses that the temperature in the storage chamber 50 is low, the mixed working fluid 812 shrinks in volume due to thermal expansion and contraction, and the pressure of the shrinking mixed working fluid 812 on the cavity 811 decreases.

[0077] One end of the driving member 81 is used to sense the temperature, the input end 2a of the transmission mechanism 82 is connected to the other end of the driving member 81, and the output end 2b of the transmission mechanism 82 is used to connect to the damper 70. Under the pressure of the internal mixed working medium 812, the driving member 81 drives the transmission mechanism 82 to move, so as to drive the damper 70 to rotate. Specifically, since the input end 2a of the transmission mechanism 82 is connected to the driving member 81, that is, the driving member 81 drives the movement of the transmission mechanism 82. When the mixed working medium 812 in the cavity 811 senses the higher temperature in the storage chamber 50 and expands, the pressure in the cavity 811 increases, and the increased pressure drives the transmission mechanism 82 to move, and then, the output end 2b of the transmission mechanism 82 drives the damper 70 to rotate in the opening direction, so that cold air is blown in to cool down. When the temperature in the storage chamber 50 decreases, the mixed working medium 812 contracts and the pressure in the cavity 811 decreases, so that the transmission mechanism 82 closes the damper 70.

[0078] The damper 70 is used to isolate the storage chamber 50 from the cooling air duct 60. When the damper 70 is completely closed, the damper 70 isolates the storage chamber 50 from the cooling air duct 60, so that the cold air cannot be introduced into the storage chamber 50 through the cooling air duct 60. When the damper 70 is opened, the damper 70 is opened at a certain angle to the horizontal direction, so that the cold air can be introduced into the storage chamber 50 through the cooling air duct 60. That is, the opening and closing angle of the damper 70 can be adjusted arbitrarily under the adjustment of the transmission mechanism 82.

[0079] The driving device 80 for controlling the damper 70 provided in the embodiment of the present disclosure is adopted, and the driving member 81 drives the transmission mechanism 82 through the thermal expansion and contraction of the mixed working medium 812, thereby controlling the opening and closing of the damper 70. The opening and closing of the damper 70 is controlled by a mechanical structure without the need to use any electrical components, which reduces the control cost of the damper 70. Moreover, since there is no need to use electrical components to control the damper 70, the driving device 80 of the damper 70 can better adapt to the ultra-low temperature control environment. Because there are no electrical components in the driving device 80, the ultra-low temperature environment cannot affect the operation of the driving device 80. In addition, the control flexibility and stability of the damper 70 are improved, and the installation space can also be saved.

[0080] Moreover, compared with the principle of the wax motor driving the damper 70 in the related art, that is, the reciprocating motion of the components is achieved by utilizing the melting expansion and cooling contraction of solid wax. Since the melting point of wax is relatively high, the use of a wax motor to drive the damper 70 must be coordinated with heating components, temperature sensors, computer boards and other components, which is more expensive. Moreover, in a low temperature environment (-40°C and below), in order to ensure that the wax reaches its melting point, the power of the required heating components also needs to be increased, and then, its volume also increases, requiring a larger installation space. In addition, the melting and cooling of the wax both require a certain amount of time, which will also cause delays in the opening and closing of the damper 70, and it is impossible to accurately and quickly control the temperature. However, only using a mechanical structure to control the opening and closing of the damper 70 not only reduces the control cost of the damper 70, saves installation space, but also achieves accurate and rapid control of the damper 70.

[0081] The cooling air duct 60 of the refrigeration system communicates with the evaporator 40 and the storage chamber 50 , so that cold air flows from the evaporator 40 to the storage chamber 50 through the cooling air duct 60 .

[0082] The damper 70 and one end of the driving member 81 are both disposed in the cooling air duct 60. Specifically, when the driving member 81 senses that the temperature of the storage chamber 50 has risen to a certain value, the pressure in the driving member 81 is increased. In a feasible embodiment, since the cooling air duct 60 and the storage chamber 50 are interconnected, the driving member 81 can also sense the temperature change of the cooling air duct 60, that is, the temperature change of the storage chamber 50.

[0083] Based on the expansion of the mixed working medium in the driving member 81, that is, the pressure inside the driving member 81 increases, the driving member 81 drives the transmission mechanism 82 to rise. Then, the transmission mechanism 82 drives the damper 70 to rotate, so that the damper 70 opens, that is, the damper 70 opens the refrigeration air duct 60. At this time, the cold air generated nearby is transmitted from the space where the evaporator 40 is located to the storage chamber 50 through the refrigeration air duct 60 to control the temperature of the storage chamber 50.

[0084] When the temperature in the storage chamber 50 drops to a suitable temperature, the pressure inside the driving member 81 is restored. Based on the relative decrease in the pressure of the driving member 81, the driving member 81 drives the transmission mechanism 82 to drop. Then, the transmission mechanism 82 rotates the damper 70 in a relatively opposite direction, so that the damper 70 is closed, that is, the damper 70 closes the refrigeration air duct 60. Finally, the temperature control in the storage chamber 50 is achieved.

[0085] Optionally, combined Figures 7 to 9 , Fig.12 As shown, the driving member 81 includes a temperature sensing device 813 and a lifting device 814 .

[0086] The temperature sensing device 813 includes a first inner cavity 8131. The lifting device 814 includes a second inner cavity 8141 with a variable volume. The first inner cavity 8131 and the second inner cavity 8141 are connected to each other to form a cavity 811.

[0087] Specifically, the first inner cavity 8131 of the temperature sensing device 813 can timely sense the temperature in the storage chamber 50, and then, the mixed working fluid 812 in the first inner cavity 8131 and the second inner cavity 8141 can expand or compress when sensing the temperature change. Since the volume of the second inner cavity 8141 of the lifting device 814 is variable, the second inner cavity 8141 can be deformed with the expansion or compression of the mixed working fluid 812. Based on the deformation of the second inner cavity 8141, for example, the second inner cavity 8141 is stretched upward or retracted downward, so that the lifting device 814 drives the input end 2a of the transmission mechanism 82 to move, thereby controlling the opening and closing of the damper 70. In this way, the cavity 811 is composed of the temperature sensing device 813 and the lifting device 814, so that the driving member 81 has both the temperature sensing function and the lifting and driving function, which can better save the installation space of the equipment and save costs.

[0088] Furthermore, a sealed cavity 811 space is formed in the driving member 81, and the mixed working fluid 812 can stably expand and contract in the cavity 811, so that the operation of the lifting device 814 is stable. Compared with the lifting system of the related technology, it is more convenient to maintain and has a lower failure rate.

[0089] Combination Fig. 9 As shown, the lifting device 814 includes a fixed end 8142 and a movable end 8143, the fixed end 8142 is connected to the temperature sensing device 813, and the movable end 8143 is connected to the input end 2a of the transmission mechanism 82. Under the pressure of the mixed working fluid 812, the movable end 8143 of the lifting device 814 can move relative to the fixed end 8142 of the lifting device 814 to drive the transmission mechanism 82 to move. For example, the bottom surface of the lifting device 814 is fixed, and the top surface of the lifting device 814 can be lifted and moved relative to the bottom surface.

[0090] That is, one end of the lifting device 814 is a fixed end 8143, and the other end is a movable end 8142, the movable end 8142 can be lifted and moved relative to the fixed end 8143, and the fixed end 8143 is sealedly connected to the temperature sensing device 813. The movable end 8142 is connected to the input end 2a of the transmission mechanism 82, so that the transmission mechanism 82 drives the damper 70 according to the lifting or lowering input by the movable end 8142.

[0091] Specifically, the temperature sensing device 813 is located at the fixed end 8142 of the lifting device 814. The temperature sensing device 813 senses the temperature change in the storage chamber 50 to expand or contract the mixed working medium 812. Then, the force generated by the expansion or contraction of the mixed working medium 812 can drive the movement of the moving end 8143 of the lifting device 814, and finally drive the transmission mechanism 82 to move up and down to control the opening and closing of the damper 70. The temperature sensing device 813 is integrally formed with the bottom surface of the lifting device 814. Alternatively, the temperature sensing device 813 is sealedly connected to the bottom surface of the lifting device 814.

[0092] Combination Figures 10 to 12 As shown, the driving device 80 further includes an adjusting mechanism 83 disposed at the moving end 8143 of the lifting device 814 to adjust the moving distance of the moving end 8143 of the lifting device 814 .

[0093] Specifically, since the mobile end 8143 of the lifting device 814 can move with the expansion and contraction of the mixed working medium 812, the opening and closing of the damper 70 can be controlled by the transmission mechanism 82. In other words, the pressure that drives the mobile end 8143 of the lifting device 814 to move is certain. As long as the pressure generated by the mixed working medium 812 in the cavity 811 at a certain temperature is greater than the pressure generated by the mobile end 8143 of the lifting device 814 moving downward, the mobile end 8143 of the lifting device 814 can be moved to open the damper 70. After the damper 70 is opened, when the storage chamber 50 returns to a certain temperature, the mixed working medium 812 will shrink and close the damper 70. Therefore, when the pressure generated downward by the mobile end 8143 of the lifting device 814 remains unchanged, the temperature in the storage chamber 50 will remain at the same temperature and cannot be adjusted. Therefore, it is necessary to add an adjustment mechanism 83 to the mobile end 8143 of the lifting device 814 to limit its moving distance. In this way, the adjustment mechanism 83 can increase or decrease the downward pressure on the moving end 8143 of the lifting device 814, thereby achieving the purpose of adjusting the temperature in the storage chamber 50.

[0094] Exemplarily, the regulating mechanism 83 applies pressure to the moving end 8143 of the lifting device 814, and only when the mixed working medium 812 in the cavity 811 is -48°C, the pressure generated in the cavity 811 can lift the moving end 8143 of the lifting device 814 at this time to cause it to displace, thereby driving the transmission mechanism 82 to control the damper 70 to open. At this time, if the temperature of the mixed working medium 812 is below -48°C, the pressure generated by the mixed working medium 812 in the cavity 811 will not move the moving end 8143 of the lifting device 814. In other words, when the temperature of the storage chamber 50 is below -48°C, the damper 70 is in a normally closed state. In this way, the regulating mechanism 83 plays a role in precise temperature control, and the user can conveniently realize precise control of the temperature in the storage chamber 50 according to the adjustment of the regulating mechanism 83.

[0095] The embodiment of the present disclosure also provides a refrigeration device, including the above refrigeration system.

[0096] At present, the -40℃ cryogenic refrigeration systems on the market are all designed for single rooms, but there are relatively few ingredients that actually need to be stored in deep cold rooms, resulting in a waste of volume. In addition, setting a low temperature of -40℃ in a large space increases the power consumption of the entire refrigeration system, resulting in a poor user experience.

[0097] The refrigeration system or refrigeration equipment of the embodiment of the present disclosure not only adopts a mixed working fluid of R290 and R600a as a refrigerant to improve the deep-freezing refrigeration performance while effectively improving power consumption and noise indicators; it also provides a driving device 80 that can automatically sense the temperature of the storage chamber 50 to drive the damper 70 to open or close the automatic temperature control system of the refrigeration duct 60.

[0098] Therefore, in practical application, the embodiment of the present disclosure can be designed with a variable temperature compartment and a deep freezing compartment. The temperature adjustment range of the variable temperature compartment is 8 to -26°C, and the temperature range covers refrigeration, ice temperature, and freezing functions. The temperature adjustment range of the deep freezing area is -28°C to -60°C, covering ordinary freezing and deep freezing functions.

[0099] The refrigeration system or refrigeration equipment of the embodiment of the present disclosure has the function of deep refrigeration because it adopts a mixed working fluid of R290 and R600a as a refrigerant. Therefore, the refrigeration system or refrigeration equipment of the embodiment of the present disclosure can achieve both the temperature adjustment range of the variable temperature compartment and the temperature adjustment range of the deep cold zone. Therefore, when using the refrigeration equipment of the embodiment of the present disclosure, it is not necessary to design a separate refrigeration system for the -40°C low temperature deep cold storage chamber 50. Furthermore, a set of refrigeration systems of the embodiment of the present disclosure can realize multiple modes, such as refrigeration + ordinary freezing, ice temperature + ordinary freezing, freezing + ordinary freezing, refrigeration + deep cold quick freezing, ice temperature + deep cold quick freezing, freezing + deep cold quick freezing, etc., and a variety of application scenarios can be provided according to actual design needs to meet the different functional requirements of users.

[0100] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A refrigeration system, characterized in that: include: A compressor, a condenser, a throttling part and an evaporator are sequentially connected to form a refrigerant flow path; A mixed working fluid is filled into the refrigerant flow path; The inlet end of the throttling portion is connected to the outlet end of the condenser and the outlet end of the throttling portion is connected to the inlet end of the evaporator; The mixed working fluid comprises: at least 20%-50% by mass of propane and at least 50%-80% by mass of isobutane.

2. The refrigeration system according to claim 1, characterized in that: The throttling part includes a first capillary tube and a second capillary tube arranged in parallel, the inlet ends of the first capillary tube and the second capillary tube are both connected to the outlet end of the condenser, and the outlet ends of the first capillary tube and the second capillary tube are both connected to the inlet end of the evaporator; and The compressor comprises: Motor; Crankshaft; and A cylinder, wherein the crankshaft connects the motor and the cylinder; Wherein, the crankshaft includes a branch channel and a main channel, wherein the main channel has a three-stage stepped structure.

3. The refrigeration system according to claim 2, characterized in that: The crankshaft comprises a distribution angle less than or equal to 60°.

4. The refrigeration system according to claim 2, characterized in that: The compressor uses RL22H brand refrigeration oil.

5. The refrigeration system according to claim 2, characterized in that: The compressor also includes: An air intake valve sheet, wherein the thickness of the air intake valve sheet is greater than or equal to 0.17 mm; and / or A cylinder head gasket is made of a mixed material of metal and nylon.

6. The refrigeration system according to any one of claims 2 to 5, characterized in that: in The flow rate range of the first capillary includes: 4 L / min to 5.5 L / min; and / or The flow rate range of the second capillary includes: 9 L / min to 11 L / min.

7. The refrigeration system according to any one of claims 1 to 5, characterized in that: Also includes: Storage room; A cooling air duct, connected to the storage chamber; An air door is arranged in the cooling air duct; as well as A driving device, the driving device is used to drive the damper to open or close the refrigeration air duct; The driving device comprises: A driving member, comprising a cavity and the mixed working fluid filled in the cavity, one end of the driving member is disposed in the storage chamber for sensing the temperature of the storage chamber, and the pressure of the mixed working fluid is proportional to the temperature; and A transmission mechanism, wherein an input end of the transmission mechanism is connected to the other end of the driving member, and an output end of the transmission mechanism is connected to the damper; Wherein, the driving member drives the transmission mechanism to move under the action of the pressure of the mixed working medium inside, so as to drive the damper to rotate.

8. The refrigeration system according to claim 7, characterized in that: The driving member comprises: A temperature sensing device comprises: a first inner cavity; and A lifting device, comprising: a second inner cavity with a variable volume, the first inner cavity and the second inner cavity are connected to each other to form the cavity, the lifting device comprises a fixed end and a movable end, the fixed end is connected to the temperature sensing device, and the movable end is connected to the input end; Wherein, under the action of the pressure of the mixed working medium, the movable end can move relative to the fixed end to drive the transmission mechanism to move.

9. The refrigeration system according to claim 8, characterized in that: The driving device comprises: The adjusting mechanism is arranged at the moving end to adjust the moving distance of the moving end.

10. A refrigeration device, characterized in that: Comprising a refrigeration system as claimed in any one of claims 1 to 9.

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