TW523573B - Coolant collector for evaporating solvent and oil molecules of vacuum pump - Google Patents

Abstract

Disclosed is a coolant collector for evaporating solvent and oil molecules of a vacuum pump, comprising: a hollow cavity having an exhaust inlet, a cooling air inlet, a filtered exhaust outlet, and a condensed liquid outlet, characterized in that: in the hollow cavity, one or more metal filtering nets are provided between the exhaust inlet and the cooling air inlet and the filtered exhaust outlet, a coolant nozzle provided at the cooling air inlet for injecting a cooling air flow towards and thus cooling the metal filtering nets such that the exhaust containing evaporating solvent and oil molecules entering the hollow cavity through the exhaust inlet may be collected as condensed liquid after being condensed by the cooled metal filtering nets whereby the condensed liquid may drip downwards and then discharged from the hollow cavity through the condensed liquid outlet, and the exhaust filtered by the metal filtering nets is discharged from the hollow cavity through the filtered exhaust outlet.

Description

523573 V. Description of the invention (1) --- The present invention relates to a cooling trap for evaporating solvents and oil molecules of a vacuum pump, and particularly relates to the use of an exhaust gas in the safety layer of a path: and the use of condensed waste of a metal mesh, Device and method for trapping waste [;: = or developing solvent. In various processes that need to extract the cavity from the cavity, the vacuum pump is generally used to extract the gas or evaporated solvent in the cavity to achieve the purpose of high truth = state in the cavity. However, during the extraction process, the extracted The exhaust gas may contain organic evaporation solvents or oil molecules needed for the lubrication of the vacuum pump itself. If these evaporated solvents and oil molecules are directly discharged into the atmosphere, it will cause environmental pollution. Therefore, the exhaust gas needs to be processed in advance, and the evaporation solvent and oil molecules that are not suitable for direct discharge to the atmosphere should be collected by filtration, and the exhaust gas that has been removed from the evaporation solvent and oil molecules should be discharged. The method of separating the evaporation solvent or oil molecules from the general exhaust gas usually includes rain species. One is to filter with a very small pore filter, and the other is to condense the evaporation solvent and oil molecules. The present invention combines the characteristics of two traditional methods. And convenience, but to remove the disadvantages that may occur in the two traditional methods, a cooling trap for evaporating solvents and oil molecules of a vacuum pump is proposed. In terms of conventional techniques, there are two ways to capture evaporated solvents and oil molecules. General rotary vacuum pumps, although equipped with a matching filter to supply a vacuum to the baking cavity, evaporate the solvent or vacuum oil molecules generated by baking and drying ^ to filter out, but if the user does not follow the prescribed period It is restricted to replace the filter material or the quality of the filter material is poor, which causes the filter to block, which greatly reduces the efficiency of the vacuum pump, or even causes the rapid wear of the vacuum pump parts, or the evaporation of solvents and oil molecules to the atmosphere, which pollutes the environment. Also low using liquid nitrogen

523573

V. Description of the invention (2) However, the liquid nitrogen's "freeze wounded human body temperature condensation" to condense and collect the evaporation solvent and oil molecules, the atmospheric pressure temperature is -1 96 ° C, when accidentally used, it is easy to be cheap or broken using an instrument Cracked and damaged. U.S. Patent No. 539 90 73 discloses a compressor unit that uses a transition material to store the condensate filtered by the condensation filter; the filter material is placed in the hot air flow path that passes through the compressor so as to be stored in the The water in the condensate was evaporated. That is, the filter material, such as permeable cloth, is used to absorb the condensate composed of water and oil, and the hot air flow passing through the compressor is used to evaporate the water, and the oil is absorbed in the permeable cloth. However, if the user fails to replace the filter material within the prescribed period, or the filter material is of low quality, the filter will have a resistance phenomenon, which will greatly reduce the efficiency of the vacuum pump, or even cause rapid wear of the vacuum pump parts, or the evaporation of solvents and oil molecules. Into the atmosphere, it still causes environmental pollution. The present invention has been improved in view of the above-mentioned disadvantages, and provides a cooling trap for evaporating solvents and oil molecules of a vacuum pump, without using liquid nitrogen, and using a condensing effect of a cooling gun that generates cooling airflow by a vortex tube. Therefore, there will be no frostbite or damage to the instrument; it is not easy to cause filter clogging because it does not use permeable cloth, plastic or non-metal filter materials for filtering. The main method used by the vacuum pump to cool the trap and evaporate the solvent and oil molecules is to 'pass the exhaust gas of the vacuum pump which has not yet passed into a hollow cavity; to pass the exhaust gas of the vacuum pump through one or more layers of metal filters; Into the cooling air flow in one or more layers of metal filter; cooling this metal filter, when the exhaust gas passes through this cooled metal filter, the cooled metal filter can be

〇178-7746TWF (N); MRL >P-91〇〇07; Rita.ptd

523573

The aforementioned exhaust gas is condensed, and the oil molecules or the evaporated solvent condensate drop down to the bottom of the cavity due to the action of gravity, so as to capture the oil molecules and the evaporated solvent contained in the exhaust gas. The main device of the cooling trap for the evaporating solvent and oil molecules of the vacuum pump is a cooling snatch and one or more layers of metal perforated nets, especially two cooling snugs embedded in a hollow cavity near the upper end, and in the hollow A metal filter is placed at the middle of the cavity. This cooling system is based on the principle of a vortex V. (3) Vortex Tube, which is filled with a compressed gas to generate a cooling airflow (temperature up to -10X: ~-4 0. 〇 into the Inside the hollow cavity, a metal filter layer is placed near the middle of the hollow cavity, and the cooling airflow provided by the cooling gun is used to spray and cool it, so that it can enter from the lower end of the metal layer. The waste gas containing evaporated solvent or oil molecules is condensed by the cooled metal filter layer, so that the evaporated solvent or oil is captured in the form of condensate and drips down to the end of the hollow cavity due to gravity. It is then discharged from the bottom end, as it is discharged through the upper end after being filtered by metal. The waste rolling after the application is used for the vacuum pump collector according to the present invention, which includes a hollow cavity with an air exhaust port, near the top end. An exhaust gas inlet in the middle, and one at the mouth; one or more metal filter screens are arranged between the inlet and the exhaust gas inlet, and a cooling gun is embedded in the cooling airflow into the metal filter screen to cool it. The filtered waste cooling air inlet trapped in the cavity containing the evaporating solvent or evaporating solvent and oil molecules is cooled, and a condensate near the bottom end is discharged into the hollow cavity. It is located directly at the exhaust gas inlet of the cooling gas, and the mouth is used to spray a cooling airflow, so that the exhaust gas entering the oil molecules from the exhaust gas inlet can be cooled by the

523573 V. Description of the invention (4) The metal filter screen is condensed into a condensate and is trapped, drips downward, and exits from the hollow cavity, and the exhaust gas that passes through the metal transition net is the filtered exhaust gas at the top. The discharge port discharges out of the middle cavity. According to the invention, the evaporation trapping of the vacuum fruit and the cooling and trapping of the oil content is that the outer cavity of the eighth hollow cavity can be covered with a thermal insulation material to prevent the external sweating of the hollow cavity and the environment caused by the heat exchange of the external gas. moist. The cooling trap for evaporating solvents and oil molecules of a vacuum pump according to the present invention has a cooling gun, and the cooling gun includes a vortex tube for filling a compressed gas to generate a cooling airflow. . The cooling trap for evaporating solvents and oil molecules of a vacuum pump according to the present invention has a condensate discharge port, and the condensate discharge port is provided with a valve for controlling the condensate discharge after being trapped. Example: As shown in Figures 1 and 2, it is a preferred embodiment of the present invention. It is a cooling trap for the evaporation of solvents and oil molecules of a vacuum pump, which includes a cavity 1 ' Cover with thermal insulation material 5 to prevent the environment from being wet due to sweating outside the hollow cavity due to the heat exchange between the inside and outside. There is an exhaust gas outlet on the top of the hollow cavity 1 and a cooling airflow inlet 12 in the middle of the hollow cavity 1 There is an exhaust gas inlet 13 at the bottom, and a condensate discharge opening 14 is provided at the bottom of the hollow cavity 1. It is characterized in that one or more metal filter layers 2 are arranged between the cooling airflow inlet 2 and the exhaust gas inlet 1 3, and the metal filter The mesh layer 2 should be in contact with the exhaust gas inlet, so that the waste flowing from the exhaust gas inlet 3

0178-7746TWF (N); MRL-P-910007; Rita.ptd Page 8 523573

5. Description of the invention (5) The gas bite immediately contacts the metal filter layer 2; and a cooling grab 3 is embedded in the cooling air inlet 12 to spray a cooling air on the metal filter 2 to cool it. So that the exhaust gas containing evaporation / mixture or oil molecules from the exhaust gas inlet 13 into the hollow cavity 1 can be condensed by the cooled metal filter to be condensed and trapped, then drip down and from the condensate discharge port The exhaust gas discharged out of the second cavity 1 and filtered by the metal filter is exhausted from the top through the tear gas exhaust outlet 11 to the outside of the hollow cavity 1. The metal filter layer 2 includes a perforated plate support 21 and one or more layers of stainless steel eyes 2 2. The perforated plate support 21 is a circular plate formed by punching a stainless steel plate with a through hole 211 having a large perforation, and is placed on a plurality of legs 212 welded to the hollow cavity 2 at an appropriate degree. The non-scale steel mesh 22 is made of stainless steel with a suitable mesh or pore size. After being cooled by a cooling stream, the exhaust gas containing evaporated solvents or oil molecules will be condensed. Dripping without blocking the stainless steel ^, the cooling gun 3 is a known tool in the market, such as the cooling gun produced by the American EXAIR company under the trademark EXAIr, or other brands of cooling guns with the same spray cooling airflow .

This cooling grab 3 is mainly based on the principle of a vortex tube. It includes a vortex tube and is filled with a compressed gas through a compressed gas inlet 31 to generate a cooling airflow (temperature up to -10 °). The cooling airflow generated by the cooling grab is injected into the metal filter layer 2 in the hollow cavity i through the cooling air inlet 12 to cool the metal filter layer 2 sufficiently to be drawn by the rotary vacuum pump and pass through. Generated by baking drying of metal filter layer

523573 5. Description of the invention (6) The degree of condensation of exhaust gas containing evaporated solvents or oil molecules. The condensed liquid evaporated from the solvent, oil molecules and water is discharged to the outside of the hollow cavity from the condensate discharge port 14 without dripping. As for the other non-condensed exhaust gas, it is discharged out of the hollow cavity 1 through the exhaust gas discharge port 11 on the top portion. In addition, the hot gas generated by the cooling grab is discharged out of the cooling grab via the hot gas outlet 32 above the cooling grab. A valve 4 is provided on the condensate discharge port 14 to control the proper discharge of the condensate. Although the present invention has been disclosed in the preferred embodiment as above, it is not limited to = invention. Any person skilled in the art can make some changes and enclose the application without departing from the spirit and = of the present invention. The scope of the patent is defined as the standard warranty. Page 10 0178-7746TWF (N); MRL-P-910007; Rita.ptd 523573 The diagram simply illustrates that in order to make the above and other objects, features, and advantages of the present invention more For obvious comprehensibility, a preferred embodiment is given below and described in detail with reference to the accompanying drawings. Brief description of the drawings: Fig. 1 is a perspective view showing a cooling trap for evaporating solvents and oil molecules of a vacuum pump according to the present invention. Fig. 2 is a longitudinal sectional view showing a cooling trap for evaporating solvents and oil molecules of a vacuum pump according to the present invention. Symbol 1 ~ Hollow cavity / 11 ~ Filtered exhaust gas discharge port 1 2 ~ Cooling air inlet 1 3 ~ Exhaust gas inlet 1 4 ~ Condensate discharge port 2 ~ Metal filter layer 2Perforated plate holder 5 ~ Heat insulating material 2 11 ~ through hole 2 1 2 ~ foot 2 2 ~ stainless steel mesh 3 ~ cooling grab 3 1 ~ compressed gas inlet

0178-7746TWF (N); MRL-P-910007; Rita.ptd page 11 523573 Simple illustration of the drawing 32 ~ hot gas outlet 4 ~ valve page 12 0178-7746TWF (N); MRL-P-910007; Rita.ptd

Claims (1)

523573 6. Scope of patent application ^, 1 · A cooling trap for evaporating solvents and oil molecules of a vacuum pump, comprising: a hollow cavity with an exhaust gas inlet, a cooling airflow inlet, a filtered exhaust gas outlet and a A condensate discharge port; at least one layer of a metal filter disposed between the exhaust gas inlet and the cooling airflow inlet and the filtered exhaust gas discharge port inside the cavity; a condensate discharge port, located at the bottom of the cavity, The condensate is discharged; and a cooling gun is arranged at the cavity and the cooling flow inlet, and is used to spray a cooling air flow on the metal filter to cool the metal filter. 2 · The cooling trap for the evaporation solvent and oil molecules of the vacuum pump according to item 1 of the scope of the patent application, wherein the cooling gun further comprises a vortex tube 'for filling a compressed gas, To generate the cooling air current 0 3 · The cooling trap for the evaporation of solvents and oil molecules of the vacuum pump as described in the first item of the declared patent scope, which further includes a control valve, located on the condensate discharge port, Used to control the discharge of this condensate. 4 · If you apply for a patent, round up! The cooling trap for the solvent and oil molecules of the vacuum pump mentioned in the item further includes-insulation ..., located outside the hollow cavity, to prevent thirst from the environment due to the sweating phenomenon inside and outside the hollow cavity of the gas. . The production of T 5 · The evaporation and dissolution for vacuum pumps as described in item 1 of the patent application scope of the cooling agent body and the oil molecule cooling trap body, wherein the hollow cavity is a hollow cavity 523573 6. Scope of patent application 6 · The cooling trap for the evaporation solvent and oil molecules of the vacuum pump as described in item 1 of the scope of patent application, wherein the material of the metal filter can be stainless steel. 7 · The cooling trap for the evaporation solvent and oil molecules of the vacuum pump according to item 1 of the scope of the patent application, wherein the material of the metal filter can be a metal material that does not react with the evaporation solvent and oil molecules. 8. The cooling trap for the evaporation solvent and oil molecules of the vacuum pump according to item 1 of the scope of the patent application, further comprising a perforated plate support to support the metal mesh layer. . ^ 9. A method for cooling trapping of evaporated solvent and oil molecules of a vacuum pump, comprising the following steps: a) passing the unfiltered vacuum pump exhaust gas into a hollow cavity; b) passing the unfiltered vacuum pump exhaust gas through At least one layer of metal filter; c) cooling the metal filter by passing a cooling air stream, and when the exhaust gas passes through the cooled metal filter, the cooled metal filter condenses the aforementioned exhaust gas, so that the oil molecules or the solvent are evaporated The condensed droplets drip down at the bottom of the cavity. 10. The method according to item 9 of the scope of patent application, wherein the cooling air flow is provided by a cooling gun. 11. The method according to item 9 of the scope of patent application, wherein the cooling gun comprises a full spiral tube (Vortex Tube) for filling a compressed gas to generate the cooling airflow. 1 2. The method according to item 9 of the scope of patent application, wherein the arrest is controlled 0178-7746TWF (N); MRL-P-910007; Rita.ptd Page 14 523573 VI. The oil molecules or the evaporation solvent condensate after the application of the patent scope are controlled by a control valve at the bottom of the cavity to control the capture Oil molecules or evaporated solvent condensate are discharged. 1 3. The method according to item 9 of the scope of patent application, wherein the outside of the cavity is covered with a thermal insulation material to prevent the environment from being wet due to sweating outside the hollow cavity due to the heat exchange between the inside and the outside of the cavity. 0178-7746TWF (N); MRL-P-910007; Rita.ptd Page 15