Parallel refrigeration compressor exhaust cooling device based on washing type oil separator

Abstract

The utility model provides a parallel refrigeration compressor exhaust cooling device based on a washing type oil separator, which is characterized in that an outlet on the left lower side of the washing type oil separator (2) is connected to an oil return port of a refrigeration compressor (1) through an oil separator oil outlet pipeline (22); an outlet in the upper right side of the washing type oil separator (2) is connected with air inlets of the evaporative condensers (3) through an oil content air outlet pipeline (21) and an evaporative cold air inlet collecting pipe (34), outlets in the bottoms of the evaporative condensers (3) are connected to a liquid storage device inlet pipe (32) through an evaporative cold liquid outlet collecting pipe (31), and an outlet in the top of the horizontal liquid storage device (4) is connected to the oil content air outlet pipeline (21). One end of the oil content cooling inlet pipe (33) is connected with the liquid storage device inlet pipe (32), and the other end of the oil content cooling inlet pipe (33) is connected to an inlet in the lower right side of the washing type oil separator (2). The device cools and lowers the temperature of exhaust gas of the refrigeration compressor through the washing type oil separator, and is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of parallel refrigeration systems, in particular to an exhaust cooling device for parallel refrigeration compressors based on washing oil. Background Art

[0002] The parallel compressor refrigeration system is composed of two or more refrigeration compressors installed in parallel on the rack of the parallel refrigeration unit, and externally connected to oil separators, liquid receivers, condensers, evaporators and other equipment, equipped with corresponding various pipes and valves. It together constitutes a parallel compressor refrigeration system. Due to its advantages of high refrigeration efficiency, easy control, safe and reliable operation, it is widely used in various occasions such as chemical industry, mining, large and medium-sized test environments, cold storage, food processing, aquatic product processing, etc.

[0003] At present, with the increasing development of large cold storage and super large cold storage, the categories of cold storage storage are becoming more and more diversified. In order to meet the refrigeration conditions of diversified storage, parallel compressor refrigeration systems are also gradually becoming diversified. For example, in terms of parallel refrigeration compressor units, refrigeration compressors of different models or types are operated in parallel to replace the parallel operation of refrigeration compressors of the same model; in terms of evaporative condensers, multiple evaporative condensers of different models or types are operated in parallel to replace one or more evaporative condensers of the same model. The parallel operation of refrigeration compressors of different models or types and the parallel operation of multiple evaporative condensers of different models or types can maximize the low temperature requirements of different storages in the cold storage. However, the parallel operation of refrigeration compressors of different models or types and the parallel operation of multiple evaporative condensers of different models or types will result in different exhaust temperatures and pressures of the refrigeration compressors, as well as different temperatures of the condensed liquid discharged from the evaporative condensers. If the traditional oil separator is used, it can no longer meet the purpose of gas and oil separation.

[0004] In addition, since different models or types of refrigeration compressors are operated in parallel, the amount of oil return required by each refrigeration compressor is also different. If the oil supply method of parallel operation of refrigeration compressors of the same model is adopted, it is very easy to cause the parallel compressors to be short of oil due to insufficient or untimely oil return. In severe cases, it will cause abnormal wear of the friction pairs of the refrigeration compressors and induce vibration and noise, which will directly affect the refrigeration efficiency and service life of the entire refrigeration system.

[0005] To sum up, when existing refrigeration compressors of different models or types are operated in parallel, the gas and oil in the oil separator are not easy to separate, and there are technical problems in the oil supply system of the parallel refrigeration compressor unit. How to ensure the smooth separation of Freon gas and lubricating oil in the oil separator and ensure that the lubricating oil can flow back to each refrigeration compressor of the parallel refrigeration compressor unit in sufficient quantity and in time, thereby ensuring the normal operation of the parallel compressors, is a technical problem that needs to be solved urgently. Summary of the invention

[0006] In view of the above-mentioned technical defects, in order to solve the problem of smooth separation of gas and oil in the oil separator and ensure normal oil return of the parallel refrigeration compressor unit, the utility model cools the washing oil separator through the condensed liquid of the evaporative condenser and supplies lubricating oil through the oil supply branch pipe assembly, and proposes a parallel refrigeration compressor exhaust cooling device based on washing oil separation.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A parallel refrigeration compressor exhaust cooling device based on washing type oil separation, comprising a refrigeration compressor, a washing type oil separator, an evaporative condenser, a horizontal liquid storage device and an oil supply branch pipe assembly, wherein the return air manifolds of the refrigeration compressors are respectively connected to the air intake ports of the refrigeration compressors through the return air branch pipes, the exhaust ports of the refrigeration compressors are respectively connected to the exhaust manifolds through the exhaust branch pipes, the other end of the exhaust manifolds is connected to the top inlet of the washing type oil separator, the lower left outlet of the washing type oil separator is respectively connected to the oil return port of the refrigeration compressor through the oil separation outlet pipeline through the oil supply branch pipe assembly, and the upper right outlet of the washing type oil separator is respectively connected to the oil return port of the refrigeration compressor through the oil separation outlet pipeline. The side outlet is connected to the evaporative cooling air inlet header through the oil separator air outlet pipe, the evaporative cooling air inlet header is connected to the air inlet of the evaporative condenser through branch pipes, the bottom outlet of each evaporative condenser is connected to the reservoir inlet pipe through the evaporative cooling liquid outlet header, the other end of the reservoir inlet pipe is connected to the top inlet of the horizontal liquid reservoir, the top outlet of the horizontal liquid reservoir is connected to the oil separator air outlet pipe through the liquid reservoir air outlet pipe, the bottom outlet of the horizontal liquid reservoir is connected to the liquid supply pipe, one end of the oil separator cooling inlet pipe is connected to the reservoir inlet pipe, and the other end of the oil separator cooling inlet pipe is connected to the lower right inlet of the washing type oil separator.

[0009] Furthermore, the installation position of the horizontal liquid storage device is 300 mm higher than the liquid level in the washing type oil separator, the washing type oil separator is installed on the rack of the parallel refrigeration unit, and the horizontal liquid storage device is installed outside the rack of the parallel refrigeration unit.

[0010] Furthermore, the oil supply branch pipe assembly comprises a stop valve A, an oil sight glass, a solenoid valve, an oil flow controller, an oil filter and a stop valve B, wherein along the flow direction of the lubricating oil in the oil supply branch pipe assembly, the stop valve A, the oil sight glass, the solenoid valve, the oil flow controller, the oil filter and the stop valve B are sequentially installed on the oil supply branch pipe, the stop valve A and the stop valve B are in a normally open state, and the solenoid valve is in a normally closed state.

[0011] Furthermore, the liquid reservoir inlet pipe is in a horizontal direction, and a liquid storage bend is arranged at a horizontal position of the liquid reservoir inlet pipe close to the horizontal liquid reservoir.

[0012] Furthermore, liquid storage bends are respectively arranged on each liquid outlet branch pipe connected to the evaporative cooling liquid outlet header and the evaporative condenser.

[0013] Compared with the prior art, the parallel refrigeration compressor exhaust cooling device based on washing oil separation, on the one hand, introduces the liquid refrigerant of the evaporative condenser into the washing oil separator by adding an oil separator cooling inlet pipe, and by setting the height difference between the horizontal liquid storage tank and the washing oil separator, ensures that the liquid refrigerant in the washing oil separator is always within the design range, and cools and reduces the temperature of the exhaust of the parallel refrigeration compressor by "washing", thereby successfully achieving the purpose of separating the refrigerant and the lubricating oil; on the other hand, by adding an oil supply branch pipe assembly and supplying lubricating oil to each refrigeration compressor by an oil pump, it is ensured that the lubricating oil smoothly enters each refrigeration compressor, and it is also convenient to observe and control the lubricating oil flow of each oil supply branch pipe assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall system principle diagram of the utility model;

[0015] Figure 2 This is a system diagram of the oil supply branch pipe assembly of the utility model.

[0016] The markings in the figure are: 1: refrigeration compressor; 11: return air manifold; 12: exhaust manifold; 2: washing oil separator; 21: oil separator air outlet pipe; 22: oil separator oil outlet pipe; 3: evaporative condenser; 31: evaporative cooling liquid outlet manifold; 311: liquid storage bend; 32: liquid storage reservoir inlet pipe; 33: oil separator cooling inlet pipe; 34: evaporative cooling air inlet manifold; 4: horizontal liquid storage reservoir; 41: liquid storage reservoir air outlet pipe; 42: liquid supply pipe; 5: oil supply branch pipe assembly; 51: stop valve A; 52: oil sight glass; 53: solenoid valve; 54: oil flow controller; 55: oil filter; 56: stop valve B. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0018] In order to make the technical problems, technical solutions and implementation effects to be solved by the present utility model clearer, the following is a summary of the technical problems, technical solutions and implementation effects of the present utility model. Figure 1 and 2 , an embodiment of the utility model is further described:

[0019] See attached Figure 1 and 2 The utility model is a parallel refrigeration compressor exhaust cooling device based on washing type oil separation, comprising a refrigeration compressor 1, a washing type oil separator 2, an evaporative condenser 3, a horizontal liquid storage tank 4 and an oil supply branch pipe assembly 5, wherein the return air manifold 11 of the refrigeration compressor 1 is respectively connected to the air intake of each refrigeration compressor 1 through a return air branch pipe, and the exhaust port of each refrigeration compressor 1 is respectively connected to the exhaust manifold 12 through an exhaust branch pipe, and the other end of the exhaust manifold 12 is connected to the top inlet of the washing type oil separator 2, and the lower left side outlet of the washing type oil separator 2 is respectively connected to the oil return port of the refrigeration compressor 1 through the oil separation oil outlet pipeline 22 through the oil supply branch pipe assembly 5, and the upper right side of the washing type oil separator 2 The outlet is connected to the evaporative cooling air inlet manifold 34 through the oil separator air outlet pipe 21, and the evaporative cooling air inlet manifold 34 is connected to the air inlet of the evaporative condenser 3 through branch pipes. The bottom outlet of each evaporative condenser 3 is connected to the liquid reservoir inlet pipe 32 through the evaporative cooling liquid outlet manifold 31, and the other end of the liquid reservoir inlet pipe 32 is connected to the top inlet of the horizontal liquid reservoir 4. The top outlet of the horizontal liquid reservoir 4 is connected to the oil separator air outlet pipe 21 through the liquid reservoir air outlet pipe 41, and the bottom outlet of the horizontal liquid reservoir 4 is connected to the liquid supply pipe 42. One end of the oil separator cooling inlet pipe 33 is connected to the liquid reservoir inlet pipe 32, and the other end of the oil separator cooling inlet pipe 33 is connected to the lower right inlet of the washing type oil separator 2.

[0020] As a preferred embodiment, the installation position of the horizontal liquid reservoir 4 is 300 mm higher than the liquid level in the washing type oil separator 2, ensuring that the liquid level height in the washing type oil separator 2 is maintained within the design range. The washing type oil separator 2 is installed on the rack of the parallel refrigeration unit, and the horizontal liquid reservoir 4 is installed outside the rack of the parallel refrigeration unit.

[0021] As a preferred embodiment, the oil supply branch pipe assembly 5 includes a stop valve A 51, an oil sight glass 52, a solenoid valve 53, an oil flow controller 54, an oil filter 55 and a stop valve B 56, wherein along the flow direction of the lubricating oil in the oil supply branch pipe assembly 5, the stop valve A 51, the oil sight glass 52, the solenoid valve 53, the oil flow controller 54, the oil filter 55 and the stop valve B 56 are sequentially installed on the oil supply branch pipe, the stop valve A 51 and the stop valve B 56 are in a normally open state, and the oil supply branch pipe assembly 5 is conveniently maintained by the stop valve A 51 and the stop valve B 56, the solenoid valve 53 is in a normally closed state, and the on and off of the oil supply branch pipe assembly 5 is controlled by the solenoid valve 53, the circulation state of the lubricating oil in the oil supply branch pipe assembly 5 is observed by the oil sight glass 52, the oil flow controller 54 controls the flow of the lubricating oil, and the lubricating oil can be filtered by the oil filter 55.

[0022] As a preferred embodiment, the liquid reservoir inlet pipe 32 is in a horizontal direction, and a liquid storage bend 311 is provided at a horizontal position of the liquid reservoir inlet pipe 32 close to the horizontal liquid reservoir 4 .

[0023] As a preferred embodiment, liquid storage bends 311 are respectively provided on each liquid outlet branch pipe connected to the evaporative cooling liquid outlet header 31 and the evaporative condenser 3 .

[0024] The refrigeration compressor 1 described in the utility model can be of the same model, different models, or different types, and the evaporative condenser 3 can be of the same model, different models, or different types. The exhaust temperatures of the refrigeration compressors 1 of different models or types are different, and after entering the washing type oil separator 2 together, they can be "washed" by the liquid refrigerant to reduce the temperature and cool them. When the exhaust temperature is reduced to the design range, the lubricating oil can be separated smoothly through separation.

[0025] The utility model discloses a parallel refrigeration compressor exhaust cooling device based on washing oil separation. When the parallel refrigeration compressor unit is operating normally, a part of the refrigerant enters the horizontal liquid storage tank 4 after being condensed by the evaporative condenser 3, and the other part enters the washing oil separator 2 along the oil separation cooling inlet pipe 33. Since the installation position of the horizontal liquid storage tank 4 is 300mm higher than the liquid level in the washing oil separator 2, the liquid refrigerant in the washing oil separator 2 after being condensed by the evaporative condenser 3 is always within the design range. At this time, the high-temperature gaseous medium discharged from the parallel refrigeration compressor 1 enters the washing oil separator 2, and the high-temperature gaseous medium exchanges heat with the liquid refrigerant to reduce the temperature of the high-temperature gaseous medium, so that the gaseous refrigerant and the lubricating oil are separated smoothly; in addition, the lubricating oil separated by the washing oil separator 2 is respectively supplied to the oil supply branch pipe assembly 5 of each refrigeration compressor 1 through the oil pump installed on the oil separation oil outlet pipe 22, thereby ensuring that the lubricating oil is sufficient and timely returned to each refrigeration compressor 1, solving the problem of oil shortage in the parallel refrigeration compressor unit.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A parallel refrigeration compressor exhaust cooling device based on washing oil separation, comprising a refrigeration compressor (1), a washing oil separator (2), an evaporative condenser (3), a horizontal liquid storage tank (4) and an oil supply branch pipe assembly (5), characterized in that: The return air manifold (11) of the refrigeration compressor (1) is connected to the air intake port of each refrigeration compressor (1) through a return air branch pipe, and the exhaust port of each refrigeration compressor (1) is connected to the exhaust manifold (12) through an exhaust branch pipe. The other end of the exhaust manifold (12) is connected to the top inlet of the washing type oil separator (2). The lower left outlet of the washing type oil separator (2) is connected to the oil return port of the refrigeration compressor (1) through an oil separation outlet pipe (22) and an oil supply branch pipe assembly (5). The upper right outlet of the washing type oil separator (2) is connected to the evaporative cooling air intake manifold (34) through an oil separation air outlet pipe (21). The evaporative cooling air intake manifold (34) is connected to the evaporative cooling air intake manifold (34). The branch pipe is connected to the air inlet of the evaporative condenser (3); the bottom outlet of each evaporative condenser (3) is connected to the liquid reservoir inlet pipe (32) through the evaporative cooling liquid outlet header (31); the other end of the liquid reservoir inlet pipe (32) is connected to the top inlet of the horizontal liquid reservoir (4); the top outlet of the horizontal liquid reservoir (4) is connected to the oil separator outlet pipe (21) through the liquid reservoir outlet pipe (41); the bottom outlet of the horizontal liquid reservoir (4) is connected to the liquid supply pipe (42); one end of the oil separator cooling inlet pipe (33) is connected to the liquid reservoir inlet pipe (32); and the other end of the oil separator cooling inlet pipe (33) is connected to the lower right inlet of the washing type oil separator (2).

2. A parallel refrigeration compressor exhaust cooling device based on washing oil according to claim 1, characterized in that: The installation position of the horizontal liquid storage tank (4) is 300 mm higher than the liquid level in the washing type oil separator (2); the washing type oil separator (2) is installed on the frame of the parallel refrigeration unit, and the horizontal liquid storage tank (4) is installed outside the frame of the parallel refrigeration unit.

3. The exhaust gas cooling device for parallel refrigeration compressors based on washing oil according to claim 1 is characterized in that: The oil supply branch pipe assembly (5) comprises a stop valve A (51), an oil sight glass (52), a solenoid valve (53), an oil flow controller (54), an oil filter (55) and a stop valve B (56), wherein the stop valve A (51), the oil sight glass (52), the solenoid valve (53), the oil flow controller (54), the oil filter (55) and the stop valve B (56) are sequentially installed on the oil supply branch pipe along the flow direction of the lubricating oil in the oil supply branch pipe assembly (5), the stop valve A (51) and the stop valve B (56) are in a normally open state, and the solenoid valve (53) is in a normally closed state.

4. The exhaust gas cooling device for parallel refrigeration compressors based on washing oil according to claim 1 is characterized in that: The liquid storage inlet pipe (32) is in a horizontal direction, and a liquid storage bend (311) is provided at a horizontal position of the liquid storage inlet pipe (32) close to the horizontal liquid storage (4).

5. The exhaust gas cooling device for parallel refrigeration compressors based on washing oil according to claim 1 is characterized in that: Liquid storage bends (311) are respectively provided on each liquid outlet branch pipe connected to the evaporative cooling liquid outlet header (31) and the evaporative condenser (3).

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