Lubricating oil recycling device for refrigerating system and refrigerating system

Abstract

The utility model provides a lubricating oil recycling device for a refrigerating system and the refrigerating system, the lubricating oil recycling device for the refrigerating system comprises an enrichment device, an air compressor, a compressor, a compressor, a compressor, a compressor, a compressor, a compressor, a compressor, a compressor and a compressor, and the enrichment device is internally provided with an accommodating cavity for accommodating mixtures; one end of the pipeline assembly is connected with the enrichment device, and the other end of the pipeline assembly is connected with the refrigeration compressor, the oil separator, the condenser and the evaporator; the sensing assembly is arranged in the enrichment device and is used for detecting indexes of the mixture; and the control box is arranged on the enrichment device and is connected with the sensing assembly. By arranging the enrichment device and the control box, monitoring of lubricating oil products in a refrigerating system is achieved, and the problems that the oil return efficiency is low, the oil accumulation amount in an evaporator is large, and the heat exchange efficiency of the evaporator is seriously affected due to the fact that the pressure difference between evaporation pressure and an air suction port of a refrigerating compressor is mostly adopted as oil return power in an existing mode are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a lubricating oil recycling device for a refrigeration system and a refrigeration system. Background Art

[0002] At present, the differential pressure oil return system is only applicable to small refrigeration systems with simple pipelines, and is difficult to apply to refrigeration systems with large and complex pipelines. The only way is to discharge the lubricating oil, which not only increases the workload and safety risks of personnel, but also increases the cost of hazardous waste treatment and reduces environmental friendliness. In addition, due to the frequency of lubricating oil discharge, it indirectly affects the heat exchange efficiency of the heat exchanger and reduces the operating efficiency of the system. Utility Model Content

[0003] The utility model provides a lubricating oil recycling device for a refrigeration system and a refrigeration system, which are used to solve the defect that the existing pressure difference oil return system is only applicable to small refrigeration systems with simple pipelines, but is difficult to be applied to refrigeration systems with large and complex pipelines.

[0004] According to a first aspect of the utility model, a lubricating oil recycling device for a refrigeration system is provided, wherein the refrigeration system comprises a refrigeration compressor, an oil separator, a condenser and an evaporator which are sequentially connected to form a refrigeration circuit;

[0005] The device includes: an enricher, which has a accommodating cavity for accommodating a mixture, wherein the mixture mainly includes lubricating oil, gaseous refrigerant and liquid refrigerant; a pipeline assembly, one end of which is connected to the enricher, and the other end of which is connected to the refrigeration compressor, the oil separator, the condenser and the evaporator; a sensor assembly, which is arranged in the enricher and is used to detect indicators of the mixture; and a control box, which is arranged in the enricher and connected to the sensor assembly.

[0006] According to one embodiment of the utility model, the pipeline assembly includes: a pressure reducing pipe, one end of which is connected to the enricher, and the other end of which is connected to the air intake port of the refrigeration compressor, for introducing the gaseous refrigerant in the enricher into the refrigeration compressor.

[0007] Specifically, this embodiment provides an implementation of a pressure reducing tube.

[0008] According to one embodiment of the utility model, the pipeline assembly includes: a boost pipe, one end of which is connected to the enricher, and the other end of which is connected between the oil separator and the condenser, for introducing the gaseous refrigerant in the oil separator into the enricher.

[0009] Specifically, this embodiment provides an implementation of a boost pipe.

[0010] According to one embodiment of the utility model, the pipeline assembly includes: an oil inlet pipe, one end of which is connected to the enricher, and the other end of which is connected to the evaporator, for introducing the lubricating oil in the evaporator into the enricher.

[0011] Specifically, this embodiment provides an implementation of an oil inlet pipe.

[0012] According to one embodiment of the utility model, the pipeline assembly includes: an oil drain pipe, one end of which is connected to the enricher, and the other end of which is respectively connected to the refrigeration compressor and the oil collector, for discharging the oil into the refrigeration compressor or the oil collector.

[0013] Specifically, this embodiment provides an implementation of an oil drain pipe.

[0014] According to one embodiment of the present invention, an observation window is provided on the side of the enricher.

[0015] Specifically, this embodiment provides an implementation of an observation window.

[0016] According to an embodiment of the utility model, the control box includes: a display screen, which is arranged on the side of the control box; and a wiring terminal, which is connected to the sensor component through a control line.

[0017] Specifically, this embodiment provides an implementation of a control box.

[0018] According to an embodiment of the utility model, the sensor assembly includes: a sensor, and a plurality of the sensors are arranged at the bottom of the accommodating cavity.

[0019] Specifically, this embodiment provides an implementation of a sensor component.

[0020] According to an embodiment of the utility model, the index includes at least any one or a combination of several of the dynamic viscosity, kinematic viscosity, water content, total number of contamination particles, acidity and turbidity of the mixture.

[0021] Specifically, this embodiment provides an implementation method of an indicator.

[0022] According to a second aspect of the present invention, a refrigeration system is provided, which comprises the lubricating oil recycling device for the refrigeration system.

[0023] The above one or more technical solutions in the utility model have at least one of the following technical effects: the utility model provides a lubricating oil recycling device and a refrigeration system for a refrigeration system, which realizes the monitoring of the lubricating oil products in the refrigeration system by setting an enricher and a control box, and solves the problem that the existing method mostly relies on the pressure difference between the evaporation pressure and the suction port of the refrigeration compressor as the oil return power, the oil return efficiency is low, and the amount of oil accumulated in the evaporator is large, which seriously affects the heat exchange efficiency of the evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the assembly relationship of the lubricating oil recycling device for a refrigeration system provided by the utility model;

[0026] Figure 2 It is a schematic diagram of the arrangement relationship of the refrigeration system provided by the utility model.

[0027] Reference numerals:

[0028] 100, refrigeration compressor; 200, oil separator; 300, condenser; 400, evaporator; 500, oil collector;

[0029] 10. Enricher; 11. Observation window;

[0030] 20. Pipeline assembly; 21. Pressure reducing pipe; 211. First solenoid valve; 22. Pressure boosting pipe; 221. Second solenoid valve; 23. Oil inlet pipe; 24. Oil outlet pipe; 241. Third solenoid valve; 242. Fourth solenoid valve;

[0031] 30. Sensing component; 31. Sensor;

[0032] 40. Control box; 41. Display screen; 42. Wiring terminal; 43. Control line; 44. Support leg. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] The present invention will be described in detail below in conjunction with specific implementation methods.

[0036] In some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the present invention provides a lubricating oil recycling device and a refrigeration system for a refrigeration system, so as to solve the defect that the existing pressure difference oil return system is only applicable to small refrigeration systems with simple pipelines, and is difficult to be applied to refrigeration systems with large and complex pipelines.

[0037] According to a first aspect of the utility model, a lubricating oil recycling device for a refrigeration system is provided, wherein the refrigeration system comprises a refrigeration compressor 100, an oil separator 200, a condenser 300 and an evaporator 400 which are sequentially connected to form a refrigeration circuit;

[0038] The device includes: an enricher 10, in which a containing cavity for containing a mixture is formed, and the mixture mainly includes lubricating oil, gaseous refrigerant and liquid refrigerant; a pipeline assembly 20, one end of which is connected to the enricher 10, and the other end of which is connected to a refrigeration compressor 100, an oil separator 200, a condenser 300 and an evaporator 400; a sensor assembly 30, which is arranged in the enricher 10 and is used to detect indicators of the mixture; and a control box 40, which is arranged in the enricher 10 and is connected to the sensor assembly 30.

[0039] It should be noted that the utility model realizes the monitoring of the lubricating oil in the refrigeration system by setting the enricher 10 and the control box 40, and solves the problem that the existing induced oil return relies on the pressure difference between the evaporation pressure and the suction port of the refrigeration compressor 100 as the oil return power, the oil return efficiency is low, and there is still a large amount of oil accumulation in the evaporator 400, which seriously affects the heat exchange efficiency of the evaporator 400; and the automatic oil drain used in ammonia refrigeration system improves the heat exchange efficiency of the evaporator 400 by discharging the refrigerant oil in the evaporator 400, but cannot achieve oil reuse and cannot monitor the oil.

[0040] Furthermore, by detecting the oil quality to determine whether the lubricating oil is to be reused or discharged, real-time monitoring and automatic reuse of the lubricating oil in the refrigeration system are achieved, and the flow direction of the lubricating oil is adjusted, thereby broadening the scope of use of the return oil and protecting the stable operation of the refrigeration compressor 100.

[0041] Furthermore, the lubricating oil recycling device provided by the utility model, with the help of the principle of pressure difference, completely relies on the high and low pressure difference of the original refrigeration system to achieve oil return, can monitor the recycled lubricating oil product information in real time, protect the operation of the compressor, and prevent liquid refrigerant from entering the compressor. It has the characteristics of simple system principle and control scheme, wide range of application, extremely small space occupation, simple oil return pipeline, and no need for personnel intervention.

[0042] In some possible embodiments of the present invention, the pipeline assembly 20 includes: a pressure reducing pipe 21, one end of the pressure reducing pipe 21 is connected to the enricher 10, and the other end of the pressure reducing pipe 21 is connected to the air intake port of the refrigeration compressor 100, for introducing the gaseous refrigerant in the enricher 10 into the refrigeration compressor 100.

[0043] Specifically, this embodiment provides an implementation of a pressure reducing pipe 21. By setting the pressure reducing pipe 21, the enricher 10 is connected to the air intake port of the refrigeration compressor 100, so that the inside of the enricher 10 is in a low-pressure state, thereby reducing the refrigerant content in the recycled lubricating oil.

[0044] In a possible embodiment, it also includes: a first solenoid valve 21, which is arranged on the path of the pressure reducing pipe 21. The arrangement of the first solenoid valve 21 realizes automatic control of the on-off of the pressure reducing pipe 21, so as to adjust the on-off of the pressure reducing pipe 21 according to the oil quality of different lubricants.

[0045] In some possible embodiments of the present invention, the pipeline assembly 20 includes: a boost pipe 22, one end of the boost pipe 22 is connected to the enricher 10, and the other end of the boost pipe 22 is connected between the oil separator 200 and the condenser 300, for introducing the gaseous refrigerant in the oil separator 200 into the enricher 10.

[0046] Specifically, this embodiment provides an implementation of a boost pipe 22. By setting the boost pipe 22, the high-pressure gas in the oil separator 200 is introduced into the enricher 10, and the lubricating oil in the enricher 10 is recycled to the refrigeration compressor 100 by relying on the pressure difference.

[0047] In a possible embodiment, it also includes: a second solenoid valve 221, which is arranged on the path of the boost pipe 22. The setting of the second solenoid valve 221 realizes automatic control of the on-off of the boost pipe 22, so as to adjust the on-off of the boost pipe 22 according to the oil quality of different lubricants.

[0048] In a possible embodiment, the condenser 300 is connected to the evaporator via a throttling device.

[0049] In some possible embodiments of the present invention, the pipeline assembly 20 includes: an oil inlet pipe 23, one end of which is connected to the enricher 10, and the other end of the oil inlet pipe 23 is connected to the evaporator 400, for introducing the lubricating oil in the evaporator 400 into the enricher 10.

[0050] Specifically, this embodiment provides an implementation of the oil inlet pipe 23. By setting the oil inlet pipe 23, the enricher 10 is connected to the evaporator 400, so that the mixture in the evaporator 400 can enter the enricher 10, reducing the refrigerant content in the recycled lubricating oil.

[0051] In a possible embodiment, it also includes: a stop valve is set on the path of the oil inlet pipe 23. By setting the stop valve, manual control of the on and off of the oil inlet pipe 23 is achieved. When a fault occurs or the solenoid valve cannot work normally, the lubricating oil can be discharged and recovered manually.

[0052] In some possible embodiments of the present invention, the pipeline assembly 20 includes: an oil drain pipe 24, one end of the oil drain pipe 24 is connected to the enricher 10, and the other end of the oil drain pipe 24 is respectively connected to the refrigeration compressor 100 and the oil collector 500, for discharging the oil drain pipe 24 into the refrigeration compressor 100 or the oil collector 500.

[0053] Specifically, this embodiment provides an implementation method of an oil drain pipe 24. By setting the oil drain pipe 24, the lubricating oil in the enricher 10 is transported to the refrigeration compressor 100 or the oil collector 500, thereby realizing real-time monitoring and automatic reuse of the lubricating oil in the refrigeration system, and determining whether the lubricating oil should be reused or discharged by detecting the oil quality.

[0054] In a possible embodiment, it further includes: a third solenoid valve 241, which is arranged on the lubricating oil path connecting the oil drain pipe 24 and the refrigeration compressor 100; and a fourth solenoid valve 242, which is arranged on the lubricating oil path connecting the oil drain pipe 24 and the oil collector 500.

[0055] It should be noted that the provision of the third solenoid valve 241 and the fourth solenoid valve 242 enables the regulation of the on-off of the connection passage between the enricher 10 and the refrigeration compressor 100 , and between the enricher 10 and the oil collector 500 .

[0056] In some possible implementations of the present invention, an observation window 11 is provided on the side of the enricher 10 .

[0057] Specifically, this embodiment provides an implementation of an observation window 11. By setting the observation window 11 on the side of the enricher 10, it is convenient to directly observe the lubricating oil in the enricher 10 so as to perform corresponding operations according to the visually observed oil condition.

[0058] In some possible implementations of the present invention, the control box 40 includes: a display screen 41 , which is arranged on the side of the control box 40 ; and a wiring terminal 42 , which is connected to the sensor assembly 30 via a control line 43 .

[0059] Specifically, this embodiment provides an implementation of a control box 40 , wherein the display screen 41 is provided to facilitate the user to set and monitor the parameters of the sensor component 30 , and the connection terminal 42 realizes data transmission with the sensor component 30 via the control line 43 .

[0060] In a possible embodiment, the control box 40 is further provided with supporting legs 44 , and the supporting legs 44 are respectively connected to the control box 40 and the enricher 10 .

[0061] In some possible implementations of the present invention, the sensor assembly 30 includes: a sensor 31, and a plurality of sensors 31 are disposed at the bottom of the accommodating cavity.

[0062] Specifically, this embodiment provides an implementation of a sensor assembly 30, and the sensor assembly 30 includes a plurality of sensors 31 arranged at the bottom of the accommodating cavity. The purpose of arranging the plurality of sensors 31 in the accommodating cavity is to monitor various indicators of the lubricating oil.

[0063] In a possible embodiment, each sensor 31 monitors the same index, which includes any one or a combination of the dynamic viscosity, kinematic viscosity, water content, total number of contamination particles, acidity and turbidity of the mixture.

[0064] In a possible embodiment, each sensor 31 monitors different indicators, including any one or a combination of the dynamic viscosity, kinematic viscosity, water content, total number of contamination particles, acidity and turbidity of the mixture.

[0065] In some possible implementations of the present invention, the index includes at least any one or a combination of several of the dynamic viscosity, kinematic viscosity, water content, total number of contamination particles, acidity and turbidity of the mixture.

[0066] Specifically, this embodiment provides an implementation method of an indicator.

[0067] In some specific embodiments of the present invention, Figure 1 and Figure 2 As shown, the present solution provides a refrigeration system having the above-mentioned lubricating oil recycling device for the refrigeration system.

[0068] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0069] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0071] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not deviate from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A lubricating oil recycling device for a refrigeration system, the refrigeration system comprising a refrigeration compressor (100), an oil separator (200), a condenser (300) and an evaporator (400) which are sequentially connected to form a refrigeration circuit; It is characterized in that The device comprises: An enricher (10) is formed with a containing chamber for containing a mixture, wherein the mixture mainly includes lubricating oil, gaseous refrigerant and liquid refrigerant; a pipeline assembly (20), one end of the pipeline assembly (20) being connected to the enricher (10), and the other end of the pipeline assembly (20) being connected to the refrigeration compressor (100), the oil separator (200), the condenser (300) and the evaporator (400); A sensor component (30) is disposed in the enricher (10) and is used to detect an index of the mixture; A control box (40) is disposed on the enricher (10) and connected to the sensor assembly (30).

2. The lubricating oil recycling device for a refrigeration system according to claim 1, characterized in that: The pipeline assembly (20) comprises: a pressure reducing pipe (21), one end of the pressure reducing pipe (21) is connected to the enricher (10), and the other end of the pressure reducing pipe (21) is connected to the air intake port of the refrigeration compressor (100), so as to introduce the gaseous refrigerant in the enricher (10) into the refrigeration compressor (100).

3. The lubricating oil recycling device for a refrigeration system according to claim 1, characterized in that: The pipeline assembly (20) comprises: a boosting pipe (22), one end of which is connected to the enricher (10), and the other end of which is connected between the oil separator (200) and the condenser (300) for introducing the gaseous refrigerant in the oil separator (200) into the enricher (10).

4. The lubricating oil recycling device for a refrigeration system according to claim 1, characterized in that: The pipeline assembly (20) comprises an oil inlet pipe (23), one end of which is connected to the enricher (10), and the other end of which is connected to the evaporator (400), for introducing the lubricating oil in the evaporator (400) into the enricher (10).

5. The lubricating oil recycling device for a refrigeration system according to claim 1, characterized in that: The pipeline assembly (20) comprises an oil drain pipe (24), one end of which is connected to the enricher (10), and the other end of which is respectively connected to the refrigeration compressor (100) and the oil collector (500), for discharging lubricating oil into the refrigeration compressor (100) or the oil collector (500).

6. The lubricating oil recycling device for a refrigeration system according to any one of claims 1 to 5, characterized in that: The side of the enricher (10) is provided with an observation window (11).

7. The lubricating oil recycling device for a refrigeration system according to any one of claims 1 to 5, characterized in that: The control box (40) comprises: A display screen (41) is arranged on a side of the control box (40); The connection terminal (42) is connected to the sensor component (30) via a control line (43).

8. The lubricating oil recycling device for a refrigeration system according to any one of claims 1 to 5, characterized in that: The sensor assembly (30) comprises: a sensor (31), wherein a plurality of the sensors (31) are arranged at the bottom of the accommodating cavity.

9. The lubricating oil recycling device for a refrigeration system according to claim 8, characterized in that: The indexes include at least any one or a combination of several of the dynamic viscosity, kinematic viscosity, water content, total number of contamination particles, acidity and turbidity of the mixture.

10. A refrigeration system, characterized in that: A lubricating oil recycling device for a refrigeration system according to any one of claims 1 to 9.

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