Automatic oil return system for refrigerating system

Abstract

The utility model provides an automatic oil return system for a refrigerating system, which comprises a base, an oil collector, an oil return pipe, a lower oil pipe, a balance pipe, a hot air bypass pipe, a heating mechanism and a control mechanism, one end of the oil return pipe, one end of the lower oil pipe, one end of the balance pipe and one end of the hot air bypass pipe are communicated with an inner cavity of the oil collector, automatic adjusting valves are arranged on the oil return pipe, the lower oil pipe, the balance pipe and the hot air bypass pipe, the active heater is arranged on one side of the oil collector, one end of the heating pipe is communicated with the inner cavity of the oil collector, and the other end of the heating pipe is connected with the active heater. The control mechanism is arranged on the base and used for controlling operation or closing of the automatic adjusting valves on the oil return pipe, the lower oil pipe, the balance pipe and the hot air by-pass pipe. According to the utility model, the lubricating oil can be automatically collected into the oil collector and is automatically returned into the refrigerating system after being distilled, and the whole process is automatic, so that the burden of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration systems, in particular to an automatic oil return system for refrigeration systems. Background Art

[0002] During operation, lubricating oil in closed-loop refrigeration systems can seep into the refrigerant system and tend to flow to the lowest pressure point in the system, typically accumulating in the evaporator. Failure to promptly remove the oil can affect the system's heat transfer efficiency, increase energy consumption, and cause valve malfunction, impacting system stability.

[0003] Currently, most refrigeration systems use manual or injection oil return methods to address the oil return issue. However, manual oil return places high demands on the operator and increases the workload. Furthermore, manual oil return is only performed after a problem occurs in the refrigeration system, creating hidden dangers during system operation. While injection oil return automatically recovers lubricating oil, its return effect is poor, particularly for low-temperature systems and high oil viscosity, rendering this oil return method unusable. Furthermore, even after lubricating oil recovery is complete, new oil still needs to be purchased and waste oil disposed of, increasing the cost of using the existing refrigeration system. Therefore, existing technologies have limitations. Utility Model Content

[0004] The utility model is developed to solve the above problems, and aims to provide an automatic oil return system for a refrigeration system.

[0005] The utility model provides an automatic oil return system for a refrigeration system, which has the following characteristics: a base, an oil collector, an oil return pipe, a lower oil pipe, a balance pipe, a hot gas bypass pipe, a heating mechanism, and a control mechanism.

[0006] The oil collector is in the shape of a tank and has an inner cavity for storing lubricating oil. The oil collector is arranged horizontally on the base.

[0007] One end of the oil return pipe, oil down pipe, balancing pipe, and hot gas bypass pipe are all connected to the inner cavity of the oil collector, and the oil return pipe, oil down pipe, balancing pipe, and hot gas bypass pipe are all equipped with automatic regulating valves. The other end of the oil return pipe is used to connect to the air inlet end of the compressor in the refrigeration system, the other end of the oil down pipe is used to connect to the upper end of the evaporator in the refrigeration system, the other end of the balancing pipe is used to connect to the lower end of the evaporator in the refrigeration system, and the other end of the hot gas bypass pipe is connected to the exhaust end of the compressor in the refrigeration system.

[0008] The heating mechanism includes an active heater and a heating tube. The active heater is arranged on one side of the oil collector. One end of the heating tube is connected to the inner cavity of the oil collector, and the other end is connected to the active heater.

[0009] The control mechanism is arranged on the base and is used to control the operation or closing of the automatic regulating valves on the oil return pipe, the lower oil pipe, the balance pipe and the hot gas bypass pipe.

[0010] The automatic oil return system for a refrigeration system provided by the utility model can also have the following feature: a sight glass for observing the lubricating oil in the inner cavity is provided on the oil collector.

[0011] The automatic oil return system for a refrigeration system provided by the present invention may also have the following feature: the active heater is an explosion-proof electric heater.

[0012] The automatic oil return system for the refrigeration system provided by the utility model can also have the following features: the temperature transmitting mechanism includes a connecting pipe and a temperature transmitter provided on one end of the connecting pipe, and the other end of the connecting pipe is connected to the inner cavity of the oil collector.

[0013] The automatic oil return system for a refrigeration system provided by the utility model can also have the following feature: the oil collector is further provided with a safety valve for controlling the pressure of the inner cavity to not exceed a specified value.

[0014] The automatic oil return system for the refrigeration system provided by the utility model can also have the following characteristics: a drain pipe is provided on one side end of the oil collector, one end of the drain pipe is connected to the inner cavity, and a valve for controlling its opening or closing is provided on the drain pipe.

[0015] The automatic oil return system for a refrigeration system provided by the present invention can also have the following feature: a pressure gauge for measuring and displaying the internal pressure of the tube cavity is further provided on the hot gas bypass pipe.

[0016] The automatic oil return system for a refrigeration system provided by the present invention may also have the following feature: the control mechanism is an integrated control cabinet.

[0017] Functions and effects of utility models

[0018] The automatic oil return system for a refrigeration system according to the present invention utilizes an independent heating mechanism and the hot air from the compressor outlet of the refrigeration system to direct lubricating oil from the oil return pipe into an oil collector. The oil then undergoes a distillation process within the oil collector before flowing back into the refrigeration system through the lower oil pipe. This process is automated by a control mechanism. Thus, the present invention automatically collects lubricating oil in the oil collector and automatically returns it to the refrigeration system after distillation, automating the entire process and reducing the burden on workers. Furthermore, because the present invention can distill lubricating oil, it reduces waste oil production, thereby lowering the operating costs of existing refrigeration systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a structural diagram of an automatic oil return system for a refrigeration system of the utility model;

[0020] Figure 2 This is a front view of an automatic oil return system for a refrigeration system according to the utility model;

[0021] Figure 3 The utility model is a top view of an automatic oil return system for a refrigeration system.

[0022] Description of reference numerals:

[0023] 1. Oil collector; 2. Oil return pipe; 3. Downstream oil pipe; 4. Balancing pipe; 5. Hot gas bypass pipe; 6. Temperature transmitter mechanism; 61. Connecting pipe; 62. Temperature transmitter; 7. Drain pipe; 71. Valve; 8. Heating mechanism; 81. Active heater; 82. Heating pipe; 9. Safety valve; 10. Base; 11. Sight glass; 12. Control mechanism; 13. Pressure gauge; 14. Automatic regulating valve. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is described in detail in the following embodiments with reference to the accompanying drawings.

[0025] Example

[0026] Figure 1 It is a structural diagram of the utility model. Figure 2 This is the main view of the utility model. Figure 3 It is a top view of the present utility model.

[0027] like Figures 1 to 3 As shown, this embodiment provides an automatic oil return system for a refrigeration system, including: an oil collector 1, an oil return pipe 2, a lower oil pipe 3, a balancing pipe 4, a hot gas bypass pipe 5, a temperature transmitting mechanism 6, a drain pipe 7, a valve 71, a heating mechanism 8, a safety valve 9, a base 10, a sight glass 11, a control mechanism 12, a pressure gauge 13, and an automatic regulating valve 14.

[0028] In this embodiment, the oil collector 1 is in the shape of a can, and has an inner cavity for storing lubricating oil. The oil collector 1 is horizontally arranged on a base 10. A plurality of sight glasses 11 are provided on the outer wall of the oil collector 1 for observing the lubricating oil in the inner cavity.

[0029] In this embodiment, the number of the viewing mirrors 11 is preferably two, and they are respectively located at the front and rear sides of the oil collector 1 .

[0030] In this embodiment, one end of the return oil pipe 2, the lower oil pipe 3, the balancing pipe 4, and the hot gas bypass pipe 5 are all connected to the inner cavity of the oil collector 1, and the return oil pipe 2, the lower oil pipe 3, the balancing pipe 4, and the hot gas bypass pipe 5 are all provided with an automatic regulating valve 14. The other end of the return oil pipe 2 is used to be connected to the air inlet end of the compressor in the refrigeration system, the other end of the lower oil pipe 3 is used to be connected to the upper end of the evaporator in the refrigeration system, the other end of the balancing pipe 4 is used to be connected to the lower end of the evaporator in the refrigeration system, and the other end of the hot gas bypass pipe 5 is connected to the exhaust end of the compressor in the refrigeration system.

[0031] In this embodiment, the temperature transmitting mechanism 6 includes a connecting tube 61 and a temperature transmitter 62 provided on one end of the connecting tube 61 , and the other end of the connecting tube 61 is communicated with the inner cavity of the oil collector 1 .

[0032] In this embodiment, a drain pipe 7 is provided on one side of the oil collector 1 , one end of the drain pipe 7 is communicated with the inner cavity, and a valve 71 for controlling the opening or closing of the drain pipe 7 is provided on the drain pipe 7 .

[0033] In this embodiment, the heating mechanism 8 includes an active heater 81 and a heating tube 82. The active heater 81 is provided on one side of the oil collector 1. One end of the heating tube 82 is connected to the inner cavity of the oil collector 1, and the other end is connected to the active heater 81. The active heater 81 is preferably an explosion-proof electric heater.

[0034] In this embodiment, the oil collector 1 is further provided with a safety valve 9 for controlling the pressure of the inner cavity to not exceed a specified value.

[0035] In this embodiment, the control mechanism 12 is provided on the base 10 and is used to control the operation or closing of the automatic regulating valves 14 on the oil return pipe 2 , the lower oil pipe 3 , the balance pipe 4 , and the hot gas bypass pipe 5 .

[0036] In this embodiment, the hot gas bypass pipe 5 is further provided with a pressure gauge 13 for measuring and displaying the internal pressure of the lumen thereof.

[0037] During use, the present invention first controls the automatic regulating valves 14 on the oil return pipe 2 and the hot gas bypass pipe 5 to open, and controls the automatic regulating valves 14 on the lower oil pipe 3 and the balancing pipe 4 to close, thereby recovering the lubricating oil within the refrigeration system compressor and completing the oil return process. The control mechanism 12 then controls the automatic regulating valve 14 on the balancing pipe 4 to open and the active heater 81 to turn on. It then controls the automatic regulating valves 14 on the oil return pipe 2, the lower oil pipe 3, and the hot gas bypass pipe 5 to close, thereby distilling the lubricating oil within the oil collector 1. Finally, the control mechanism 12 controls the automatic regulating valve 14 on the lower oil pipe 3 to open and the active heater 81 to turn on. It then controls the automatic regulating valves 14 on the oil return pipe 2, the balancing pipe 4, and the hot gas bypass pipe 5 to close, completing the oil drain process.

[0038] This automatically recovers compressed lubricant from the low-pressure side and, after a period of time, forces the recovered lubricant back into the compressor assembly for storage and reuse. This not only reduces operating costs but also ensures stable compressor operation. This makes the present invention suitable for use in industries such as oil, gas, chemicals, and food and beverages, and can be used with most types of refrigerants, including propane, ammonia, and fluorocarbons. Furthermore, the multiple advantages offered by the present invention can enhance the performance and lifespan of critical compression and processing systems, making it an indispensable component of refrigeration systems.

[0039] Functions and Effects of the Embodiments

[0040] The automatic oil return system for a refrigeration system according to the present invention utilizes an independent heating mechanism and the hot air from the compressor outlet of the refrigeration system to direct lubricating oil from the oil return pipe into an oil collector. The oil then undergoes a distillation process within the oil collector before flowing back into the refrigeration system through the lower oil pipe. This process is automated by a control mechanism. Thus, the present invention automatically collects lubricating oil in the oil collector and automatically returns it to the refrigeration system after distillation, automating the entire process and reducing the burden on workers. Furthermore, because the present invention can distill lubricating oil, it reduces waste oil production, thereby lowering the operating costs of existing refrigeration systems.

[0041] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. An automatic oil return system for a refrigeration system, characterized in that: include: Base, oil collector, oil return pipe, oil down pipe, balance pipe, hot gas bypass pipe, heating mechanism, and control mechanism, The oil collector is in the shape of a tank and has an inner cavity for storing lubricating oil. The oil collector is arranged transversely on the base. One ends of the oil return pipe, the lower oil pipe, the balancing pipe, and the hot gas bypass pipe are all connected to the inner cavity of the oil collector, and the oil return pipe, the lower oil pipe, the balancing pipe, and the hot gas bypass pipe are all provided with automatic regulating valves. The other end of the oil return pipe is used to be connected to the air inlet end of the compressor in the refrigeration system, the other end of the lower oil pipe is used to be connected to the upper end of the evaporator in the refrigeration system, the other end of the balancing pipe is used to be connected to the lower end of the evaporator in the refrigeration system, and the other end of the hot gas bypass pipe is connected to the exhaust end of the compressor in the refrigeration system. The heating mechanism includes an active heater and a heating tube. The active heater is provided on one side of the oil collector. One end of the heating tube is communicated with the inner cavity of the oil collector, and the other end is connected to the active heater. The control mechanism is arranged on the base, and is used to control the operation or closing of the automatic regulating valves on the oil return pipe, the lower oil pipe, the balance pipe, and the hot gas bypass pipe.

2. The automatic oil return system for a refrigeration system according to claim 1, characterized in that: in, The oil collector is provided with a sight glass for observing the lubricating oil in the inner cavity.

3. The automatic oil return system for a refrigeration system according to claim 1, characterized in that: in, The active heater is an explosion-proof electric heater.

4. The automatic oil return system for a refrigeration system according to claim 1, characterized in that: Also includes: The temperature transmitting mechanism comprises a connecting pipe and a temperature transmitter arranged on one end of the connecting pipe, and the other end of the connecting pipe is communicated with the inner cavity of the oil collector.

5. The automatic oil return system for a refrigeration system according to claim 1, characterized in that: in, The oil collector is also provided with a safety valve for controlling the pressure of the inner cavity to not exceed a specified value.

6. The automatic oil return system for a refrigeration system according to claim 1, characterized in that: in, A drain pipe is provided on one side end of the oil collector, one end of the drain pipe is communicated with the inner cavity, and a valve for controlling the opening or closing of the drain pipe is provided on the drain pipe.

7. The automatic oil return system for a refrigeration system according to claim 1, characterized in that: in, The hot gas bypass pipe is also provided with a pressure gauge for measuring and displaying the internal pressure of the pipe cavity.

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