A horizontal siphon tank with both liquid storage and washing oil separation functions

Abstract

The present invention belongs to a horizontal siphon tank that combines the functions of a liquid receiver and a washing type oil separator. The problems to be solved are those existing in the background technology: the exhaust temperature of the compressor is relatively high, causing serious scaling on the outer wall of the heat exchange tubes in the front section of the evaporative cooler, which affects the performance of the evaporative cooler; the lubricating oil affects the system performance, and oil removal design and regular oil draining operations at various locations are required. The key technical solution for solving this technical problem is: there are a liquid receiver intermediate baffle and an oil separator intermediate baffle, which divide the liquid phase into a refrigeration liquid phase, an oil cooling liquid phase, and an oil separator liquid phase. The evaporative cooler liquid outlet is at the upper part of the refrigeration liquid phase, the oil cooling suction port is at the upper part of the oil separator liquid phase, the compressor exhaust port is immersed in the oil separator liquid phase, the refrigeration liquid outlet is connected to the refrigeration liquid phase, the oil cooling liquid outlet is connected to the oil cooling liquid phase, the oil drain port is connected to the oil separator liquid phase, and the gas outlet is connected to the gas phase. It is applicable to the refrigeration system.

Description

Technical Field The present invention belongs to the field of refrigeration technology, and particularly relates to a horizontal siphon tank that combines the functions of a liquid receiver and a washing type oil separator.

[0001] Background Art: Nowadays, the proportion of screw compressors used in cold storage refrigeration systems is increasing, especially in large and medium-sized refrigeration systems. Screw compressors generally use liquid-cooled oil coolers, and auxiliary containers such as an evaporative condenser, a siphon tank, and a liquid receiver are configured in the refrigeration system. The exhaust gas of the screw compressor directly enters the evaporative condenser and condenses into a liquid, which then enters the siphon tank. Part of the liquid in the siphon tank enters the liquid-cooled oil cooler by gravity for evaporation refrigeration, and the other part of the liquid falls into the liquid receiver, and the liquid in the liquid receiver participates in the refrigeration cycle of the terminal evaporator. The authorized publication number CN 105066534 B, "A Thermosiphon Oil Cooling Device with a Horizontal Siphon Liquid Receiver", combines the siphon tank and the liquid receiver into one, with a simple system pipeline, maintaining the subcooling degree of the refrigeration liquid supply and improving the system performance. However, there are still the following disadvantages: The exhaust gas temperature of the compressor is relatively high. When it directly enters the evaporative condenser, it will cause the outer wall temperature of the heat exchange tubes in the front section of the evaporative condenser to be high, and serious scale formation will occur, affecting the performance of the evaporative condenser; Although the oil separation effect of the screw compressor is very high, there is still a small amount of lubricating oil that enters components such as the evaporative condenser, the siphon tank, the liquid receiver, and the terminal evaporator along with the exhaust gas, affecting the system performance, and oil removal design and regular oil draining operations at various locations are required. Summary of the Invention The object of the present invention is to provide a horizontal siphon tank that combines the functions of a liquid receiver and a washing type oil separator, so as to solve the problems existing in the background technology: the exhaust temperature of the compressor is relatively high, resulting in serious scaling on the outer wall of the heat exchange tubes in the front section of the evaporative cooler, affecting the performance of the evaporative cooler; the lubricating oil affects the system performance, and oil removal design and regular oil draining operations at various locations are required. The technical solution adopted to solve this technical problem is: a horizontal siphon tank that combines the functions of a liquid receiver and a washing type oil separator, characterized in that: the liquid outlet of the evaporative cooler, the gas outlet, and the gas return port of the oil cooler are connected to the gas phase, the liquid outlet of the oil cooler, the oil drain port, and the refrigerant liquid outlet are connected to the liquid phase, and the exhaust port of the compressor is immersed in the interior of the liquid phase. A further improved solution is: a horizontal siphon tank that combines the functions of a liquid receiver and a washing type oil separator, characterized in that a liquid receiver intermediate baffle is provided, dividing the liquid phase into a refrigerant liquid phase and an oil cooler liquid phase. The liquid outlet of the evaporative cooler is located above the refrigerant liquid phase, the gas return port of the oil cooler is located above the oil cooler liquid phase, the exhaust port of the compressor is immersed in the interior of the oil cooler liquid phase, the refrigerant liquid outlet is connected to the refrigerant liquid phase, the liquid outlet of the oil cooler, the oil drain port are connected to the oil cooler liquid phase, and the gas outlet is connected to the gas phase. A further improved solution is: a horizontal siphon tank that combines the functions of a liquid receiver and a washing type oil separator, characterized in that a liquid receiver intermediate baffle and an oil separator intermediate baffle are provided, dividing the liquid phase into a refrigerant liquid phase, an oil cooler liquid phase, and an oil separator liquid phase. The liquid outlet of the evaporative cooler is located above the refrigerant liquid phase, the gas return port of the oil cooler is located above the oil separator liquid phase, the exhaust port of the compressor is immersed in the interior of the oil separator liquid phase, the refrigerant liquid outlet is connected to the refrigerant liquid phase, the liquid outlet of the oil cooler is connected to the oil cooler liquid phase, the oil drain port is connected to the oil separator liquid phase, and the gas outlet is connected to the gas phase.

[0002] The beneficial effects of the present invention compared with the prior art are as follows: The basic settings of using oil-cooled liquid supply, oil-cooled suction gas, evaporative condenser liquid return, and suction gas are in a siphon tank. The refrigeration liquid supply set directly participates in the end refrigeration cycle, and the liquid receiver is cancelled, enabling the siphon tank to have the function of a liquid receiver. The compressor exhaust port is set to enter the liquid phase, washing and cooling the high superheat exhaust gas to saturated gas, and washing the lubricating oil particles contained in the gas into the refrigerant liquid, enabling the siphon tank to also have the function of a washing type oil separator. As a three-in-one design, the present invention has the remarkable effects of simplifying the system design and saving costs. The gas at the outlet contains almost no lubricating oil. Compared with the system directly exhausting into the evaporative condenser, the performance of the evaporative condenser is improved, and the saturated gas temperature at the outlet is relatively low. After entering the evaporative condenser, it directly condenses without the superheat zone of the conventional evaporative condenser, making the temperature of the outer wall of the front-section heat exchange tube relatively low and not easily scaling, greatly extending the performance decay time of the evaporative condenser, which means the performance of the evaporative condenser is improved; further, adding an intermediate partition in the liquid receiver can, on the one hand, maintain the subcooling degree of the evaporative condenser liquid return and improve the system economy, and on the other hand, isolate the lubricating oil outside the refrigeration liquid phase. In this way, the end evaporator is not affected by the oil film, the heat transfer temperature difference is reduced, and the refrigeration performance is improved. In addition, in the design, only the oil return of the siphon tank is considered, without considering the oil return design of the rest of the system components, simplifying the system and operation; furthermore, adding an intermediate partition in the liquid receiver and an intermediate partition in the oil separator divides the liquid phase into three parts: refrigeration liquid phase, oil-cooled liquid phase, and oil separator liquid phase. The liquid in the oil-cooled liquid phase comes from the overflow of the refrigeration liquid phase and the oil separator liquid phase. The benefit of this is that the volume of the oil separator liquid phase is guaranteed, that is, ensuring that the effect of the washing type oil separator will not be affected by the reduction of the liquid level in the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0003] Figure 1 is a schematic structural diagram of the present invention.

[0004] Figure 2 is a schematic structural diagram of the present invention with an intermediate baffle in the liquid receiver.

[0005] Figure 3 is a schematic structural diagram of the present invention with an intermediate baffle in the liquid receiver and an intermediate baffle in the oil separator. DETAILED DESCRIPTION OF THE INVENTION

[0006] Example 1: Refer to Figure 1 , a horizontal siphon tank with both the functions of a liquid receiver and a washing type oil separator, characterized in that: the evaporative condenser liquid return port 4, the outlet port 3, and the oil-cooled suction gas port 2 are connected to the gas phase, the oil-cooled liquid outlet port 6, the oil drain port 7, and the refrigeration liquid outlet port 5 are connected to the liquid phase, and the compressor exhaust port 1 is immersed in the liquid phase.

[0007] Example 2: Refer to Figure 2, A horizontal siphon tank with both a liquid reservoir and a washing type oil separator function, characterized in that a liquid reservoir intermediate baffle 8 is provided, dividing the liquid phase into a refrigeration liquid phase and an oil cooling liquid phase. The evaporation and cooling liquid outlet 4 is at the upper part of the refrigeration liquid phase, the oil cooling suction port 2 is at the upper part of the oil cooling liquid phase, the compressor discharge port 1 is immersed inside the oil cooling liquid phase, the refrigeration liquid outlet 5 is connected to the refrigeration liquid phase, the oil cooling liquid outlet 6, the oil drain port 7 are connected to the oil cooling liquid phase, and the gas outlet 3 is connected to the gas phase.

[0008] Example 3: Refer to Figure 3 , A horizontal siphon tank with both a liquid reservoir and a washing type oil separator function, characterized in that a liquid reservoir intermediate baffle 8 and an oil separator intermediate baffle 9 are provided, dividing the liquid phase into a refrigeration liquid phase, an oil cooling liquid phase and an oil separator liquid phase. The evaporation and cooling liquid outlet 4 is at the upper part of the refrigeration liquid phase, the oil cooling suction port 2 is at the upper part of the oil separator liquid phase, the compressor discharge port 1 is immersed inside the oil separator liquid phase, the refrigeration liquid outlet 5 is connected to the refrigeration liquid phase, the oil cooling liquid outlet 6 is connected to the oil cooling liquid phase, the oil drain port 7 is connected to the oil separator liquid phase, and the gas outlet 3 is connected to the gas phase.

Claims

1. A horizontal siphon tank with both a liquid reservoir and a washing type oil separator function, characterized in that the evaporation and condensation liquid outlet (4), the gas outlet (3), and the oil cooling return gas port (2) are connected to the gas phase. The oil cooling liquid outlet (6), the oil drain port (7), and the refrigeration liquid outlet (5) are connected to the liquid phase. The compressor exhaust port (1) is immersed inside the liquid phase. A liquid reservoir intermediate baffle (8) is provided, dividing the liquid phase into a refrigeration liquid phase and an oil cooling liquid phase. The evaporation and condensation liquid outlet (4) is above the refrigeration liquid phase. The oil cooling return gas port (2) is above the oil cooling liquid phase. The compressor exhaust port (1) is immersed inside the oil cooling liquid phase. The refrigeration liquid outlet (5) is connected to the refrigeration liquid phase. The oil cooling liquid outlet (6) and the oil drain port (7) are connected to the oil cooling liquid phase. The gas outlet (3) is connected to the gas phase.

2. A horizontal siphon tank with both a liquid reservoir and a washing type oil separator function, characterized in that the evaporation and condensation liquid outlet (4), the gas outlet (3), and the oil cooling return gas port (2) are connected to the gas phase. The oil cooling liquid outlet (6), the oil drain port (7), and the refrigeration liquid outlet (5) are connected to the liquid phase. The compressor exhaust port (1) is immersed inside the liquid phase. A liquid reservoir intermediate baffle (8) and an oil separator intermediate baffle (9) are provided, dividing the liquid phase into a refrigeration liquid phase, an oil cooling liquid phase, and an oil separator liquid phase. The evaporation and condensation liquid outlet (4) is above the refrigeration liquid phase. The oil cooling return gas port (2) is above the oil separator liquid phase. The compressor exhaust port (1) is immersed inside the oil separator liquid phase. The refrigeration liquid outlet (5) is connected to the refrigeration liquid phase. The oil cooling liquid outlet (6) is connected to the oil cooling liquid phase. The oil drain port (7) is connected to the oil separator liquid phase. The gas outlet (3) is connected to the gas phase.

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