Auto-cascade low-temperature oil cooling unit

Abstract

The auto-cascade low-temperature oil cooling unit comprises a condenser, an evaporative condenser, an expansion tank and an expansion oil tank, the condenser comprises a condenser body, a compressor and a nitrogen charging device, an outer shell of the condenser body is of a double-layer shell structure comprising an inner shell and an outer shell, the compressor is communicated with the inner shell through a pipeline, and the nitrogen charging device is communicated with the outer shell through a pipeline. The nitrogen charging device is further provided with a pressure gauge, the inner shell is connected with an expansion tank through a pipeline and further connected with an expansion oil tank through an oil supply device, and the expansion oil tank is connected with the evaporative condenser through a pipeline. According to the utility model, the structure of the unit is further simplified, so that the whole oil cooling unit can realize the effects of high cooling speed and energy conservation in operation only by using the condenser, the evaporative condenser, the expansion tank and the expansion oil tank.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cooling units, in particular to a self-cascade low-temperature oil cooling unit. Background Art

[0002] At present, the existing organic waste gas recovery device has a relatively complex structure, high production cost, poor waste gas adsorption efficiency, low recovery rate and high energy consumption.

[0003] Although most of the water in the exhaust gas is removed in the precooler and the front refrigeration system, it is inevitable that there is still a certain amount of moisture (when the exhaust gas temperature drops to ~4°C, the saturated water content in the exhaust gas is about ~6g / m 3 ) enters the low-temperature condensation box, where it will freeze into frost and ice. As the use time increases, more and more frost will form and eventually the air duct will be blocked. Therefore, the ice needs to be removed regularly. Utility Model Content

[0004] The utility model aims to provide a self-cascade low-temperature oil cooling unit to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-cascade low-temperature oil cooling unit, comprising: a condenser, an evaporative condenser, an expansion tank, and an expansion oil tank. The condenser comprises a condenser body, a compressor and a nitrogen charging device. The outer shell of the condenser body is a double-shell structure including an inner shell and an outer shell. The compressor is connected to the inner shell through a pipeline, and the nitrogen charging device is connected to the outer shell through a pipeline. The nitrogen charging device is also provided with a pressure gauge. The inner shell is connected to the expansion tank through a pipeline, and the inner shell is also connected to the expansion oil tank through an oil supply device. The expansion oil tank is connected to the evaporative condenser through a pipeline.

[0006] Preferably, the nitrogen charging device comprises a liquid nitrogen storage tank, a liquid nitrogen delivery pump and an exhaust valve, and the liquid nitrogen delivery pump is connected to the shell through a pipeline.

[0007] Preferably, the compressor is a circulation pump.

[0008] Preferably, the oil supply device comprises an oil supply pipeline and an oil return pipeline, and both ends of the oil supply pipeline and the oil return pipeline are respectively connected to the inner shell and the expansion oil tank.

[0009] Preferably, a pressure gauge is also provided on the oil supply pipeline, and a thermometer is provided on the oil return pipeline.

[0010] The purpose of the utility model is to overcome the deficiencies of the prior art and design a self-cascade low-temperature oil chiller. By making the outer shell of the condenser body a double-shell structure including an inner shell and an outer shell, a set of nitrogen filling device can be added to further improve the refrigeration efficiency. When it is detected that the temperature of the thermometer on the return oil pipeline is high, the liquid nitrogen delivery pump of the nitrogen filling device is started to fill the liquid nitrogen between the outer shell and the inner shell, thereby achieving the effect of quickly reducing the temperature in the inner shell, further simplifying the structure of the unit, so that the entire oil chiller only needs a condenser, an evaporative condenser, an expansion tank, and an expansion oil tank to achieve the effect of fast cooling speed and energy-saving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure: 1. condenser body, 2. evaporative condenser, 3. expansion tank, 4. expansion oil tank, 5. nitrogen charging device, 6. compressor, 7. oil supply pipeline, 8. oil return pipeline. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0014] See also Figure 1 A self-cascade low-temperature oil cooling unit includes: a condenser, an evaporative condenser 2, an expansion tank 3, and an expansion oil tank 4. The condenser includes a condenser body 1, a compressor 6 and a nitrogen charging device 5. The outer shell of the condenser body 1 is a double-shell structure including an inner shell and an outer shell. The compressor 6 is connected to the inner shell through a pipeline, and the nitrogen charging device 5 is connected to the outer shell through a pipeline. The nitrogen charging device 5 is also provided with a pressure gauge. The inner shell is connected to the expansion tank 3 through a pipeline, and the inner shell is also connected to the expansion oil tank 4 through an oil supply device. The expansion oil tank 4 is connected to the evaporative condenser 2 through a pipeline.

[0015] The nitrogen charging device 5 comprises a liquid nitrogen storage tank, a liquid nitrogen delivery pump and an exhaust valve, and the liquid nitrogen delivery pump is connected to the housing through a pipeline.

[0016] The compressor 6 is a circulation pump.

[0017] The oil supply device comprises an oil supply pipeline 7 and an oil return pipeline 8 , both ends of which are connected to the inner shell and the expansion oil tank 4 respectively.

[0018] The oil supply pipeline 7 is also provided with a pressure gauge, and the oil return pipeline 8 is provided with a thermometer.

[0019] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore should not be understood as a limitation on the present invention.

[0020] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screw-on" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-cascade low-temperature oil cooling unit, comprising: Condenser, evaporative condenser, expansion tank, expansion oil tank, characterized in that: the condenser includes a condenser body, a compressor and a nitrogen charging device, the outer shell of the condenser body is a double-shell structure including an inner shell and an outer shell, the compressor is connected to the inner shell through a pipeline, the nitrogen charging device is connected to the outer shell through a pipeline, the nitrogen charging device is also provided with a pressure gauge, the inner shell is connected to the expansion tank through a pipeline, the inner shell is also connected to the expansion oil tank through an oil supply device, and the expansion oil tank is connected to the evaporative condenser through a pipeline.

2. The self-cascade low-temperature oil cooling unit according to claim 1 is characterized in that: The nitrogen charging device comprises a liquid nitrogen storage tank, a liquid nitrogen delivery pump and an exhaust valve, and the liquid nitrogen delivery pump is connected with the shell through a pipeline.

3. The self-cascade low-temperature oil cooling unit according to claim 1 is characterized in that: The compressor is a circulation pump.

4. The self-cascade low-temperature oil cooling unit according to claim 1 is characterized in that: The oil supply device comprises an oil supply pipeline and an oil return pipeline, and both ends of the oil supply pipeline and the oil return pipeline are respectively communicated with the inner shell and the expansion oil tank.

5. The self-cascade low-temperature oil cooling unit according to claim 4 is characterized in that: The oil supply pipeline is also provided with a pressure gauge, and the oil return pipeline is provided with a thermometer.

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