KR200480421Y1 - Grinding apparatus including a drain module - Google Patents

Abstract

The grinding apparatus includes a grinding processing module including a grinding assembly for grinding a side surface of the object; A vacuum pipe connected to the grinding process module; A vacuum pump connected to the vacuum pipe; And a drain module installed in the vacuum pipe for discharging grinding oil generated in the grinding processing module, wherein the drain module includes a main storage tank for storing the grinding oil, a buffer tank connected to the main storage tank, A diaphragm valve connected to the tank through a grinding oil inflow connection pipe and connected to the buffer tank through a grinding oil discharge connection pipe, an air connection pipe connected to the grinding oil discharge pipe and capable of air injection and air discharge, And a grinding fluid outlet valve connected to the tank. One side of the drain module is connected to the grinding process module through the vacuum pipe, and the other side of the drain module is connected to the vacuum pump through the vacuum pipe.

Description

[0001] The present invention relates to a grinding apparatus including a drain module,

The present invention relates to a grinding (cutting) apparatus, and more particularly to a grinding apparatus including a drain module.

A variety of grinding (cutting) devices can be used for machining the furnace body in the industrial field. The grinding body may be supplied with grinding oil (grinding fluid, cutting fluid) to the grinding processing module so that the grinding of the object to be grinded can be performed smoothly. The grinding fluid can be discharged to the vacuum pump through the vacuum pipe when grinding the object. However, the grinding fluid discharged from the grinding processing module may remain in the vacuum pipe to affect the vacuum pressure, or may remain in the vacuum pump to damage the vacuum pump or cause malfunction of the vacuum pump.

A problem to be solved by the technical idea of the present invention is to provide a grinding apparatus including a drain module capable of discharging grinding oil to the outside.

According to an aspect of the present invention, there is provided a grinding apparatus including: a grinding processing module including a grinding assembly for grinding an object; A vacuum pipe connected to the grinding process module; A vacuum pump connected to the vacuum pipe; And a drain module installed in the vacuum pipe for discharging grinding oil generated in the grinding processing module, wherein the drain module includes a main storage tank for storing the grinding oil, a buffer tank connected to the main storage tank, A diaphragm valve connected to the tank through a grinding oil inflow connection pipe and connected to the buffer tank through a grinding oil discharge connection pipe, an air connection pipe connected to the grinding oil discharge pipe and capable of air injection and air discharge, And a grinding oil external discharge valve connected to the tank, wherein one side of the drain module is connected to the grinding process module through the vacuum pipe, and the other side of the drain module is connected to the vacuum pump through the vacuum pipe

delete

In one embodiment of the present invention, the buffer tank is located below the main storage tank, and the grinding oil inflow connection pipe may be connected to a lower portion of the main storage tank.

In one embodiment of the present invention, the grinding fluid discharge connection pipe is connected to the upper portion of the buffer tank, and the grinding fluid external discharge valve may be connected to one side portion of the buffer tank.

In one embodiment of the present invention, the diaphragm valve is located between the main reservoir tank and the buffer tank, and the diaphragm valve may include a cylinder block, a pusher installed on the cylinder block, and a diaphragm connected to the pusher have.

In one embodiment of the present invention, the diaphragm valve is connected to a first air inlet tube and a first air outlet tube, wherein the first air inlet tube and the first air outlet tube are provided with a first slave node valve , The diaphragm valve may be turned on and off by the first slave node valve.

In one embodiment of the present invention, the air connecting pipe is connected to a second air inlet pipe and a second air outlet pipe, and the second air inlet pipe and the second air outlet pipe are respectively connected to a second solenoid valve and a third solenoid valve, Valves may be installed.

According to an embodiment of the present invention, there is provided a grinding apparatus comprising: a stage having a grinding body disposed on an upper surface thereof; a y-axis moving module capable of moving the stage in a y-axis direction and moving the grinding processing module; An x-axis moving module capable of moving in an x-axis direction perpendicular to the y-axis direction from an upper portion of the y-axis moving module transferred into the grinding processing module, and having a grinding assembly and a grinding oil jetting portion in the transfer body; Wherein the x-axis moving module is coupled to the x-axis moving module in the grinding processing module, and the z-axis moving module moves the x-axis moving module in a z-axis direction perpendicular to a plane formed by the x- Moving module; A vacuum pump connected to the grinding process module through a vacuum pipe; And a drain module installed in the vacuum pipe between the grinding processing module and the vacuum pump and discharging grinding oil sprayed from the grinding oil sprayer.
The drain module includes a main storage tank installed in the vacuum pipe and storing grinding oil, a buffer tank connected to the main storage tank through a grinding oil connection pipe, a buffer tank installed in the grinding oil connection pipe, A diaphragm valve for regulating the flow of the grinding oil, an air connecting pipe connected to the buffer tank, and a grinding oil external discharge valve for discharging the grinding oil in the buffer tank.

delete

In one embodiment of the present invention, the diaphragm valve is connected to a first air inlet pipe and a first air outlet pipe which are turned on and off by a first solenoid valve, respectively, and the air connecting pipe is connected to a second solenoid valve And a second air inlet pipe and a second air outlet pipe which are respectively turned on and off by two solenoid valves may be connected.

The grinding apparatus according to an embodiment of the present invention includes a drain module capable of discharging grinding oil to the outside in a vacuum state. Accordingly, the grinding apparatus of the present invention can discharge the grinding oil to the outside through the drain module, thereby reducing contamination of the vacuum pipe and malfunction of the vacuum pump.

FIG. 1 is a conceptual view of an apparatus for grinding according to an embodiment of the present invention.
FIG. 2 is a view showing in detail a portion where the grinding apparatus shown in FIG. 1 is installed.
Fig. 3 is a view showing a state in which the grinding assembly of the grinding apparatus shown in Fig. 2 grinds the side surface (side surface) of the object.
Fig. 4 is a view showing another side of the state in which the grinding assembly shown in Fig. 3 grinds the side surface of the object.
5 is a view for explaining a drain module of the grinding apparatus according to an embodiment of the present invention.
FIG. 6 is an enlarged cross-sectional view of the diaphragm valve of FIG. 5; FIG.
7 to 10 are views for explaining a process of discharging grinding oil using the drain module of the grinding apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Embodiments of the present invention are provided to more fully illustrate the present invention to those skilled in the art, and the following embodiments may be modified in various ways, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, an area, or a substrate is referred to as being "on", "connected to", or "coupled to" another element, May be interpreted as being "on", "connected", or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. Like numbers refer to like elements.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present disclosure.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, in the figures the elements are turned over so that the elements depicted as being on the top surface of the other elements are oriented on the bottom surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive concept. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

The following embodiments of the present invention are described with reference to the drawings schematically illustrating ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to any particular shape of the regions shown herein, but should include variations in shape resulting, for example, from manufacturing. The following embodiments of the present invention may be implemented in any one of the following embodiments, and the following embodiments may be implemented by combining one or more of them.

FIG. 1 is a conceptual view of an apparatus for grinding according to an embodiment of the present invention, FIG. 2 is a view showing in detail a site where the grinding apparatus shown in FIG. 1 is installed, Fig. 4 is a view showing another side of the state in which the grinding assembly shown in Fig. 3 grinds the side surface of the object to be polished. Fig.

1 through 4, an apparatus 1000 according to an embodiment of the present invention may include a grinding assembly 400 included in a grinding processing module 500. The grinding processing module 500 may mean a grinding chamber. The grinding apparatus 1000 includes a y-axis moving module 100, an x-axis moving module 200, and a z-axis moving module 300. The y-axis moving module 100 includes a stage 110 and a y-axis feeder 120. The pedestal 10 is placed on the stage 110.

The grinding apparatus 1000 of the present invention presents a glass substrate as an example of the object 10 as an object. The glass substrate can be used as an external window of a mobile device. A mobile device refers to a portable information processing device such as a smart phone, a smart pad, a PMP, or a tablet PC. The glass substrate can have a very thin thickness of about 0.4 mm to 1 mm so as to be easily carried by the nature of a mobile device. Since the glass substrate is a very precise electronic device, the size of the glass substrate must be made very precisely.

The grinding apparatus 1000 of the present invention can grind the surface or the side surface of the pedestal 10. The grinding apparatus 1000 of the present invention can be referred to as a side grinding apparatus since the side surface (side surface) of the object 10 can be ground. The grinding apparatus 1000 of the present invention can be used to grind various non-ferrous materials other than the ferrous body 10, for example, iron. The grinding apparatus 1000 of the present invention may be a glass side grinding apparatus when the object 10 is a glass substrate.

The grinding apparatus 1000 of the present invention is configured such that the y-axis transfer unit 120 is coupled to the lower portion of the stage 110 to move the stage 110 in the y-axis direction. The y-axis conveying unit 120 is connected to the conveying rail 20, which is elongated in the x-axis direction, in parallel along the y-axis direction. The y-axis transfer unit 120 moves the stage 110 in the y-axis direction between the grinding process modules 500 in which the grinding process of the body 10 is substantially progressed.

The y-axis feeder 120 moves the stage 110 to the grinding module 500 to move the grinding wheel 10 to be fed along the feed rail 20 on the stage 110 When the grinding process is completed in the grinding process module 500, the stage 110 is moved to the feed rail 20 so that the workpiece 10 placed on the stage 110 is discharged to the outside along the feed rail 20 do.

The x-axis moving module 200 moves in the x-axis direction perpendicular to the y-axis direction on the upper side of the y-axis moving module 100. The x-axis moving module 200 moves on top of the stage 110 in the grinding processing module 500. The x-axis moving module 200 includes a transfer body 210, an x-axis transfer portion 220, a grinding assembly 230, and a grinding fluid dispensing portion 240.

The x-axis transferring unit 220 moves the transferring body 210 in the x-axis direction. The x-axis transport unit 220 may be long along the x-axis, and the transport body 210 may have a structure that is coupled to the x-axis transport unit 220 by a predetermined length in the y-axis direction. The grinding assembly 230 is mounted on one side of the transfer body 210 that meets the x axis.

The grinding assembly 230 may include a grinding pad 232 and a rotating portion 234. The grinding assembly 230 grinds the surface or the side surface of the object 10 while rotating in a spindle configuration. The grinding assembly 230 may have a structure in which the grinding pad 232 is coupled to the rotating portion 234 so that the grinding pad 232 that substantially grinds the object 10 can be replaced.

The conveying body 210 can move in the x-axis direction by the x-axis conveying unit 220 and the abovedes 10 can move in the y-axis direction by the stage 110 coupled to the y-axis conveying unit 120 Therefore, the grinding assembly 230 that grinds the side surface of the object 10 can freely move in a substantially planar manner along the x- and y-axis directions and grind the object 10 as a whole.

The grinding oil dispenser 240 is mounted on the transfer body 210 so that the grinding assembly 230 can inject the grinding fluid 40 toward a portion where the grinder assembly 10 is to be ground. The grinding oil 40 reduces the friction between the grinding assembly 230 and the workpiece 10 to assist grinding while removing heat generated therefrom.

The z-axis moving module 300 is coupled to the x-axis moving module 200 to move the x-axis moving module 200 in the z-axis direction perpendicular to the plane formed by the x-axis direction and the y-axis direction. The z-axis moving module 300 can be coupled with the x-axis moving unit 220 of the x-axis moving module 200 to move the entire x-axis moving module 200 in the z-axis direction. the z-axis moving module 300 moves the grinding assembly 230 in the upward direction from the side of the blank 10 when the grinding assembly 230 does not grind the side of the blank 10, The grinding assembly 230 can be lowered so as to be in contact with the side surface of the object 10 when grinding the side surface of the object 10.

A vacuum pipe 420 may be connected to the grinding process module 500 of the grinding apparatus 1000. The vacuum pipe 420 may be connected to the vacuum pump 700. The grinding fluid generated in the grinding assembly 230 or the grinding processing module 500 may be discharged to the outside through the vacuum pipe 420 and the vacuum pump 700.

The vacuum pipe 420 of the grinding apparatus 1000 is provided with a drain module 600 capable of discharging the grinding oil discharged from the grinding processing module 500 in a vacuum state. Accordingly, since the grinding fluid discharged from the grinding processing module 500 is discharged to the drain module 600 in a vacuum state, inflow of the grinding fluid into the vacuum pump 700 side can be suppressed.

Accordingly, the grinding apparatus 1000 of the present invention can suppress the damage of the vacuum pump 700 caused by the grinding oil remaining in the vacuum pump 700, and also can prevent the malfunction of the vacuum pump 700. The drain module 600 will be described in more detail below.

FIG. 5 is a view for explaining a drain module of the grinding apparatus according to an embodiment of the present invention, and FIG. 6 is an enlarged cross-sectional view of the diaphragm valve of FIG.

Specifically, the drain module 600 may be installed in the vacuum pipe 420. One side of the drain module 600 may be connected to the grinding processing module 500 through a vacuum pipe 420 and the other side of the drain module 600 may be connected to the vacuum pump 700 through a vacuum pipe 420. The drain module 600 may be mounted on the module support 618.

The drain module 600 includes a main storage tank 606 in which the grinding oil 602 is stored, a buffer tank 608 connected to the main storage tank 606, a main storage tank 606 and a grinding oil inflow connection pipe 612, And a diaphragm valve 620 connected to the buffer tank 608 through a connection pipe 614 for discharging the grinding fluid. The grinding oil inflow connection pipe 612 and the grinding oil discharge connection pipe 614 are grinding oil connection pipes through which the grinding oil flows.

The buffer tank 608 is located below the main storage tank 606. The grinding oil inflow connection pipe 612 is connected to the lower portion of the main storage tank 606. The grinding oil discharge connection pipe 614 is connected to the upper portion of the buffer tank 608.

The diaphragm valve 620 is located between the main storage tank 606 and the buffer tank 608. The diaphragm valve 620 includes a cylinder block 626a, a pusher 626b installed in the cylinder block 626a, and a diaphragm 626c connected to the pusher 626b. The diaphragm valve 620 can be moved up and down (left and right in the drawing) of the diaphragm 626c and the pusher 626b depending on whether air is injected or not, so that the on / off of the diaphragm valve 620 can be determined. The diaphragm valve 620 regulates the flow of the grinding fluid 602 to the buffer tank 608 by on-off as described in more detail below.

A first air inlet pipe 640 and a first air outlet pipe 642 are connected to the diaphragm valve 620. A first slave node valve 652 is installed in the first air inlet pipe 640 and the first air outlet pipe 642. The diaphragm valve 620 may be turned on and off by the first slave node valve 652 (S / V1).

5, even if the first slave node valve 652 (S / V1) is opened, air can be injected through the first air injection pipe 640 and air can be exhausted through the first air exhaust pipe 642. [ 5, no air is injected into the diaphragm valve 620, so that the diaphragm valve 620 maintains the off state.

The drain module 600 includes an air connection pipe 630 connected to the grinding oil discharge connection pipe 614 and capable of air injection and air discharge and a grinding oil external discharge valve 632 connected to the buffer tank 608 do. The air connection pipe 630 is connected to the second air inlet pipe 644 and the second air outlet pipe 646. The grinding oil external discharge valve 632 may be connected to one side of the buffer tank 608. The grinding oil external discharge valve 632 can discharge the grinding oil 602 in the buffer tank 608 to the outside as will be described later in detail.

The second air inlet pipe 644 and the second air outlet pipe 646 are provided with a second solenoid valve 654 and a third solenoid valve 656 and S / V 3, respectively. The second air inlet pipe 644 may be provided with an air conditioner 658 which can adjust the amount of air flowing if necessary. The third solenoid valve 656 (S / V3) may be connected to a vacuum pump (not shown) to be air sucked (vacuum evacuated).

5 shows a state in which the second solenoid valve 654 (S / V2) and the third solenoid valve 656 (S / V3) are not turned on so that air injection and air suction are not performed. The grinding oil external discharge valve 632 is connected to one side of the buffer tank 608. The grinding oil external discharge valve 632 may be constituted by a fourth solenoid valve (S / V4).

The drain module 600 configured as described above may have an initial state as shown in FIG. That is, the vacuum pipe 420 may have a vacuum state 604 in the inside of the vacuum pipe as the grinding process proceeds. As the grinding process proceeds, the upper portion of the main storage tank 606 is in a vacuum state 604, and the lower portion of the main storage tank 606 is capable of storing grinding oil 602.

The diaphragm valve 620 indicates an off state by simultaneous air injection and air discharge through the first solenoid valve 652. FIG. 5 shows that the first solenoid is turned off, that is, air injection and air discharge are simultaneously performed. The buffer tank 608 is an air state (610) in which the inside is filled with air. The second solenoid valve 654 (S / V2) and the third solenoid valve 656 (S / V3) are off. And the grinding oil external discharge valve 632 indicates an OFF state.

7 to 10 are views for explaining a process of discharging grinding oil using the drain module of the grinding apparatus according to an embodiment of the present invention.

7 to 10 are views sequentially illustrating a process of discharging the grinding fluid 602 in a vacuum state using the drain module 600 of the grinding apparatus according to an embodiment of the present invention. 9 shows the diaphragm valve state of Fig.

7 shows a state in which the third solenoid valve 656 is opened and the buffer tank 608 is in a vacuum state 604 as indicated by a dotted line. That is, when the third solenoid valve 656 is opened, the air in the buffer tank 608 is sucked through the second air discharge pipe 646 to change the inside of the buffer tank 608 to a vacuum state.

8 shows a state in which the first solenoid valve 652 is opened and the grinding oil 602 in the main storage tank 606 is moved into the buffer tank 608 as indicated by a dotted line. That is, when the first solenoid valve 652 is opened, air is injected through the first air injection pipe 640 to turn on the diaphragm valve 620 as shown in FIG.

In other words, air is injected into the diaphragm valve 620 to move the diaphragm 626c and the pusher 626b upward (left in the drawing). In this case, the grinding oil 602 in the main storage tank 606 can move to the buffer tank 608.

10, the second solenoid valve 654 is opened and the grinding oil external discharge valve 632 and the fourth solenoid valve (S / V4) are also opened as indicated by the dotted line to perform grinding in the buffer tank 608 And the oil is discharged to the outside. That is, the second solenoid valve 654 is opened to inject air through the second air inlet pipe 644 and the air connecting pipe 630, and the grinding oil external discharge valve 632 and the fourth solenoid valve S / )) Is opened. The grinding fluid 602 in the buffer tank 608 can be discharged to the outside through the grinding oil external discharge valve 632 and the fourth solenoid valve S / V4. Then, as shown in Fig. 10, the buffer tank 608 is in an air injection state (610). The operation state of the drain module 600 described above is one embodiment.

As described above, the grinding apparatus 1000 of the present invention can discharge the grinding oil 602 to the outside by using the drain module 600 in a vacuum state. Accordingly, the grinding apparatus 1000 of the present invention does not discharge the grinding fluid 602 toward the vacuum pump 700, thereby reducing the malfunction of the vacuum pump 700.

While the embodiments of the present invention have been illustrated and described with reference to the accompanying drawings, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. You can understand that you can.

Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that various changes, substitutions, and other equivalent embodiments may be made by those skilled in the art . It is to be understood that the above-described embodiments are illustrative and non-restrictive in every respect. The true scope of technical protection of the present invention should be determined by the technical idea of the appended claims.

The present invention relates to an abrasive apparatus for grinding an abrasive article and a grinding apparatus for grinding an abrasive article using the abrasive article of the present invention. The present invention relates to a grinding apparatus for grinding a workpiece by grinding a workpiece with a grinding tool and a grinding tool for grinding the workpiece by grinding the workpiece with the grinding tool, 612: A grinding oil inlet connection pipe, 614: A grinding oil discharge connection pipe, 620: A diaphragm valve, 630: An air connection pipe, 632: A grinding oil external discharge valve, 640, 644: Discharge pipe, 652, 654, 656: solenoid valve, 700: vacuum pump

Claims (10)

A grinding processing module including a grinding assembly for grinding the workpiece;
A vacuum pipe connected to the grinding process module;
A vacuum pump connected to the vacuum pipe; And
And a drain module installed in the vacuum pipe for discharging the grinding oil generated in the grinding processing module,
The drain module is connected to the main storage tank through which the grinding oil is stored, the buffer tank connected to the main storage tank, the main storage tank through the grinding oil inflow connection pipe, and the diamond tank connected to the buffer tank through the grinding oil discharge connection pipe. And a grinding oil outlet valve connected to the grinding oil discharge connection pipe and connected to the air tank,
Wherein one end of the drain module is connected to the grinding process module through the vacuum pipe and the other end of the drain module is connected to the vacuum pump through the vacuum pipe. delete The grinding apparatus according to claim 1, wherein the buffer tank is located below the main storage tank, and the grinding oil inflow connection pipe is connected to a lower portion of the main storage tank. The grinding apparatus according to claim 1, wherein the connection pipe for discharging the grinding oil is connected to an upper portion of the buffer tank, and the grinding oil external discharge valve is connected to one side of the buffer tank. The apparatus of claim 1, wherein the diaphragm valve is located between the main storage tank and the buffer tank, and the diaphragm valve includes a cylinder block, a pusher installed on the cylinder block, and a diaphragm connected to the pusher. Grinding device. [2] The apparatus of claim 1, wherein the diaphragm valve is connected to a first air inlet tube and a first air outlet tube, wherein the first air inlet tube and the first air outlet tube are provided with a first slave node valve, And the front valve is turned on and off by the first slave node valve. 7. The air conditioner according to claim 6, wherein the air connecting pipe is connected to a second air inlet pipe and a second air outlet pipe, and a second solenoid valve and a third solenoid valve are respectively installed in the second air inlet pipe and the second air outlet pipe And a grinding device for grinding the grinding wheel. A y-axis moving module capable of moving the stage in the y-axis direction and moving it into the grinding processing module;
An x-axis moving module capable of moving in an x-axis direction perpendicular to the y-axis direction from an upper portion of the y-axis moving module transferred into the grinding processing module, and having a grinding assembly and a grinding oil jetting portion in the transfer body;
Wherein the x-axis moving module is coupled to the x-axis moving module in the grinding processing module, and the z-axis moving module moves the x-axis moving module in a z-axis direction perpendicular to a plane formed by the x- Moving module;
A vacuum pump connected to the grinding process module through a vacuum pipe; And
And a drain module installed in the vacuum pipe between the grinding processing module and the vacuum pump and discharging grinding oil sprayed from the grinding oil sprayer,
The drain module includes a main storage tank installed in the vacuum pipe and storing grinding oil, a buffer tank connected to the main storage tank through a grinding oil connection pipe, a buffer tank installed in the grinding oil connection pipe, And a grinding oil external discharge valve capable of discharging the grinding oil in the buffer tank, and a diaphragm valve for controlling the flow of the grinding oil, an air connecting pipe connected to the buffer tank, and a grinding oil external discharge valve for discharging the grinding oil in the buffer tank. delete 9. The air conditioner according to claim 8, wherein the diaphragm valve is connected to a first air inlet tube and a first air outlet tube which are turned on and off by a first solenoid valve,
Wherein the air connecting pipe is connected to a second air inlet pipe and a second air outlet pipe which are respectively turned on and off by a second solenoid valve and a second solenoid valve.

Images