CN108993015A - Filter device and its maintaining method - Google Patents
Filter device and its maintaining method Download PDFInfo
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- CN108993015A CN108993015A CN201811129902.XA CN201811129902A CN108993015A CN 108993015 A CN108993015 A CN 108993015A CN 201811129902 A CN201811129902 A CN 201811129902A CN 108993015 A CN108993015 A CN 108993015A
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- Prior art keywords
- filter
- liquid
- control valve
- purge gas
- filter device
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 159
- 238000010926 purge Methods 0.000 claims abstract description 90
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims description 83
- 239000000203 mixture Substances 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 18
- 238000009423 ventilation Methods 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000015654 memory Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention relates to technical field of manufacturing semiconductors more particularly to a kind of filter devices and its maintaining method.The filter device includes: filter, including input terminal and the output end opposite with the input terminal, for being filtered to the liquid inputted from the input terminal；Purging portion, for from the input terminal to the filter transmission purge gas, the residual liquid in the filter to be discharged from the output end.The present invention accelerates the velocity of discharge of filter interior residual liquid, shortens the maintenance time of filter device, reduces human cost.
Description
Technical field
The present invention relates to technical field of manufacturing semiconductors more particularly to a kind of filter devices and its maintaining method.
Background technique
With the development of plane flash memories, the production technology of semiconductor achieves huge progress.But recently
Several years, the development of plane flash memory encountered various challenges: physics limit, the existing developing technique limit and storage electron density
Limit etc..In this context, to solve the difficulty that encounters of planar flash memory and pursue being produced into for lower unit storage unit
This, a variety of different three-dimensional (3D) flash memories structures are come into being, such as 3D NOR (3D or non-) flash memory and 3D NAND
(3D and non-) flash memory.
Wherein, storage element is used three dimensional pattern layer using its small size, large capacity as starting point by 3D nand memory
Folded highly integrated of layer heap is design concept, produces the memory of high unit area storage density, efficient storage unit performance,
Have become the prevailing technology of emerging memory design and producing.
In the manufacturing process of 3D nand memory, it is often necessary to using various types of chemical liquids come to semiconductor
Substrate or device architecture are handled.In order to avoid at use chemical liquid is to semiconductor substrate or device architecture
Impurity is introduced during reason, and improves the effect of chemical liquid processing, usually before chemical liquid is transmitted to reaction chamber,
It needs to be filtered chemical liquid using filter device.However, with the extension of use time, the filter in filter device
Performance can reduce, at this point, then needing to replace filter.But existing filter device is due to the limitation of its structure, more
It is longer to change the cumbersome of filter, time, and easily reaction chamber is polluted.
Therefore, how the structure of filter device is improved, to simplify the replacement operation of filter, reduces human cost
Waste, be a technical problem to be solved urgently.
Summary of the invention
The present invention provides a kind of filter device and its maintaining method, for solving existing filter device due to its structure
The problem that maintenance time is long, human cost is high caused by limitation.
To solve the above-mentioned problems, the present invention provides a kind of filter devices, comprising:
Filter, including input terminal and the output end opposite with the input terminal, for being inputted to from the input terminal
Liquid be filtered；
Purging portion is used for from the input terminal to the filter transmission purge gas, will be residual in the filter
Liquid stay is discharged from the output end.
Preferably, the purging portion includes:
First pipe, one end are used for for being connected to the gas source for storing the purge gas, the other end connection input terminal
To purge gas described in the filter transmission；
First control valve is installed in the first pipe, for controlling whether the first pipe is connected.
Preferably, further includes:
Input channel, for the liquid to be filtered to the filter transmission；
Second control valve is installed in the input channel, for control the filter and store it is to be filtered described in
Whether it is connected between the source of supply of liquid.
Preferably, further includes:
Output channel is used for transmission the filtered liquid；
Third control valve is installed in the output channel, for control the filter with for receive it is filtered
Whether it is connected between the receiving end of the liquid.
Preferably, further includes:
Collection portion is connect with the output channel between the third control valve and the output end, for collected from
The mixture being made of the remaining liquid and the purge gas being discharged in the filter.
Preferably, the collection portion includes:
Gas-liquid separator is connected to the output channel, for separating the liquid and the purging from the mixture
Gas；
Gas collection end connects the gas-liquid separator, for collecting the purge gas after separating；
Liquid collecting terminal connects the gas-liquid separator, for collecting the liquid after separating.
Preferably, the collection portion further include:
Second pipe, one end is connected to the gas-liquid separator, the other end is connected to the liquid collecting terminal；
4th control valve is installed in the second pipe, for controlling whether the second pipe is connected.
Preferably, the collection portion further include:
Sensor is installed in the second pipe between the 4th control valve and the gas-liquid separator, described second
Whether pipeline receives the liquid through the gas-liquid separator separates；
Control unit connects the sensor and first control valve, for determining that the second pipe do not receive
After the liquid of the gas-liquid separator separates, first control valve is closed.
Preferably, further includes:
Ventilation shaft, one end is connected to the filter, the other end is in communication with the outside, for adjusting the pressure in the filter
Power；
Discharge conduit, one end is connected to the filter, the other end is in communication with the outside, residual in the filter for excluding
The liquid stayed.
Preferably, the purge gas is nitrogen.
To solve the above-mentioned problems, a kind of filter device maintaining method, includes the following steps:
A filter is provided, the filter is for filtering liquid；
It transmits in purge gas to the filter, the residual liquid in the filter is discharged.
Preferably, the specific steps in transmission purge gas to the filter include:
First pipe is provided, the first pipe is used for the filter transmission purge gas, and the first pipe
In have the first control valve；
Detect whether that the purging for receiving user's sending instructs, if so, first control valve is opened, to the filtering
Purge gas is transmitted in device.
Preferably, the liquid to be filtered is transmitted to the filter through an input channel, has in the input channel
Have for controlling the second control valve whether being connected between the filter and the source of supply for storing the liquid to be filtered；Institute
It states the filtered liquid of filter to transmit through an output channel, have in the output channel for controlling the filter
The third control valve whether being connected between the receiving end for receiving the filtered liquid；Purge gas is transmitted to described
Further include following steps before in filter:
Simultaneously close off second control valve and the third control valve.
Preferably, further include following steps before transmitting in purge gas to the filter:
One discharge conduit is provided；
It is connected to the discharge conduit and the filter；
It is connected to the filter and ambient atmosphere by a ventilation shaft, remaining partially liq is through institute in the filter
State discharge conduit discharge.
Preferably, the specific steps in transmission purge gas to the filter include:
Simultaneously close off the discharge conduit and the ventilation shaft；
It transmits in purge gas to the filter, by residual remaining in the filter liquid and the purging
The mixture that gas is constituted is expelled to the output channel.
Preferably, further include following steps:
The mixture is received in output channel between the third control valve and the filter；
Separate the liquid in the mixture and the purge gas；
The liquid after separation is collected respectively with the purge gas.
Preferably, further include following steps:
A second pipe is provided, the second pipe is used for received from the liquid separated in the mixture；
Detect whether the second pipe receives the liquid separated from the mixture, if it is not, then closing institute
State the first control valve.
Preferably, further include following steps:
Whether the humidity for detecting the mixture is lower than default humidity, if so, closing first control valve.
Preferably, closing first control valve further includes later following steps:
The input channel, the output channel, the discharge conduit, the ventilation shaft and the filtering are separated respectively
Device；
Replace the filter.
Preferably, the purge gas is nitrogen.
Filter device and its maintaining method provided by the invention are accelerated by carrying out gas purging to filter interior
The velocity of discharge of filter interior residual liquid shortens the maintenance time of filter device, reduces human cost.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of filter device in the specific embodiment of the invention；
Attached drawing 2 is the schematic illustration that filter interior residual liquid is discharged in the specific embodiment of the invention；
Attached drawing 3 is the control block diagram of filter device in the specific embodiment of the invention；
Attached drawing 4 is the flow chart of filter device maintaining method in the specific embodiment of the invention.
Specific embodiment
The specific embodiment of filter device provided by the invention and its maintaining method is done specifically with reference to the accompanying drawing
It is bright.
It is provided with one or more filter in the manufacturing process of semiconductor, in filter device, is used for filtering both chemical
The liquid such as medical fluid.When needing to carry out periodicmaintenance or replacement to filter, discharge is needed to remain on the filter device
In the liquid such as chemical liquid.Currently, common method is first by residual liquid in entire filtration circuit with cycle bleeder
Mode is discharged, and stops cycle bleeder later, starts that residual liquid in the filter is discharged.
In the filter is discharged when residual liquid, usually the filter is communicated with the atmosphere, utilizes gravity
Effect make the liquid remained in the filter drip.Obviously, the effect discharge residual liquid of gravity, meeting are relied solely on
Lead to the extension of raffinate efflux time, and then influences semiconductor production efficiency；Moreover, because the liquid of filter device filtering is most
Number is acid chemical liquid, and therefore, prolonged liquid drip process is easy to cause the leakage of acid medical fluid, is filled to filtering
It sets internal various pipelines to pollute, influences the filter effect in later period；It meanwhile being currently mostly to receive to fill by man-hour manually hand-held
The bottom end for being placed in the filter receives the liquid of drippage, and this not only adds the burdens of staff, and lead to a large amount of people
The waste of power resource.
To solve the above-mentioned problems, present embodiment provides a kind of filter device, and attached drawing 1 is of the invention specific real
Apply the structural schematic diagram of filter device in mode.As shown in Figure 1, the filter device that present embodiment provides, including filtering
Device 10 and purging portion.The filter 10, including input terminal and the output end opposite with the input terminal, for described in
The liquid of input terminal input is filtered；Purging portion, for transmitting purge gas from the input terminal to the filter 10, with
Residual liquid in the filter 10 is discharged from the output end.
Liquid in present embodiment can be acidic chemical medical fluid, alkali electroless medical fluid or deionized water etc..
Specifically, when safeguard or replace the filter 10 to the filter device, first with the side of cycle bleeder
Residual liquid in filtration circuit 18 (including complicated a plurality of pipeline, therefore being represented by dotted lines) is discharged in formula.It completes
In the filtration circuit 18 after the discharge of residual liquid, blown by the purging portion to described in 10 internal transmission of filter
The liquid of 10 internal residual of filter is discharged using the flowing of gas for scavenging body.Compared in traditional handicraft only according to
The mode of residual liquid, present embodiment can accelerate the remaining liquid from institute in gravity drippage filter
State the speed being discharged in filter 10, shorten raffinate efflux time, so reduce the filter device periodicmaintenance or
Person replaces filter the time it takes；Since drain age velocity is accelerated, the contaminated probability of pipeline in filter device is reduced；And
And save human resources.
Preferably, the purging portion includes: first pipe 111, one end be used to be connected to the gas source for storing the purge gas,
The other end is connected to the input terminal, for transmitting the purge gas to the filter 10；First control valve 112, is installed on
In the first pipe 111, for controlling whether the first pipe 111 is connected.
Preferably, the filter device further include: input channel 121, it is to be filtered for being transmitted to the filter 10
The liquid；Second control valve 122 is installed in the input channel 121, for controlling the filter 10 with storage to mistake
Whether the source of supply 123 of the liquid of filter is connected to.
Specifically, along the flow direction of the liquid, the first pipe 111 is set to second control valve 122
Downstream, and be connected to the input channel 121.When the filter device works normally, second control valve 122 is opened
It opens and first control valve 112 is closed, the liquid to be filtered is transmitted to from source of supply 123 through the input channel 121
The filter 10 is filtered；When the filter device carries out periodicmaintenance or replace the behaviour of the filter 10
When making, second control valve 122 is closed and first control valve 112 is opened, and the purge gas is through the first pipe
111 are transmitted to the filter 10, the remaining liquid in the filter 10 is discharged.
Preferably, the filter device further include: output channel 131 is used for transmission the filtered liquid；Third control
Valve 132 processed is installed in the output channel 131, for controlling the filter 10 and being used to receive the filtered liquid
Whether it is connected between the receiving end of body.It is furthermore preferred that the filter device further include: collection portion is controlled with the third is located at
Output channel 131 between valve 132 and the output end connects, for being discharged in the filter 10 by remaining
The mixture that the liquid and the purge gas are constituted.
Specifically, along the flow direction of the liquid, the collection portion is set to the upper of the third control valve 132
Trip, and be connected to the output channel 131.When the filter device works normally, the third control valve 132 is opened, warp
The filtered liquid of the filter 10 is from the output channel 131 transmission receiving end (such as liquids recovery end 133 or described
Filtration circuit 18)；It is described when the filter device carries out periodicmaintenance or carries out replacing the operation of the filter 10
Third control valve 132 is closed, and the purge gas transmits the residual liquid in the filter 10 through the transmission pipeline 131
Human cost is further saved to the collection portion to reduce the burden of staff.
Preferably, the collection portion includes: gas-liquid separator 14, is connected to the output channel 131, is used for from the mixing
The liquid and the purge gas are separated in object；Gas collection end 151 connects the gas-liquid separator 14, divides for collecting
The purge gas from after；Liquid collecting terminal 153 connects the gas-liquid separator 14, for collecting the liquid after separating
Body.
Attached drawing 2 is the schematic illustration that filter interior residual liquid is discharged in the specific embodiment of the invention, in Fig. 2
Arrow direction indicates the injection direction of the purge gas.Specifically, as shown in Figure 1 and Figure 2, the purge gas injects institute
After stating filter 10, as the purge gas and remain on described in the gas-liquid mixture warp that the liquid in the filter 10 is formed
Output channel 131 is transmitted to the gas-liquid separator 14；It, can be respectively to the purging after the gas-liquid separator 14 processing
Gas is collected with the liquid, further simplifies raffinate recovery process, improves the automation journey of the filter device
Degree.
In order to avoid being polluted to the pipeline inside the filter device, it is preferred that the collection portion further include: second
Pipeline 151, one end is connected to the gas-liquid separator 14, the other end is connected to the liquid collecting terminal 153；4th control valve 152, peace
Loaded in the second pipe 151, for controlling whether the second pipe 151 is connected.By the way that the 4th control valve is arranged
152, whether the internal duct for controlling the filter device is connected to the liquid collecting terminal 153, to avoid liquid collection
The acidity or alkaline environment at end 153 impact the filter device internal duct.
Attached drawing 3 is the control block diagram of filter device in the specific embodiment of the invention.In order to further increase the filtering
The degree of automation of device, it is preferred that the collection portion further include: sensor 31 is installed on the 4th control valve 152 and institute
It states in the second pipe 151 between gas-liquid separator 14, for detecting whether the second pipe 151 receives through the gas-liquid
The liquid that separator 14 separates；Control unit 30 connects the sensor 31 and first control valve 112, for true
The fixed second pipe 151 does not receive after the liquid of the gas-liquid separator 14 separation, closes first control
Valve 112.
Specifically, second pipe is flowed to from the gas-liquid separator 14 when liquid has been not detected in the sensor 31
When road 151, i.e., when the described second pipe 151 does not receive the liquid separated through the gas-liquid separator 14, then illustrate institute
The residual liquid stated in filter 10 has drained, and closes at this point, the control unit 30 not only can control first control valve 112
It closes, to stop carrying out gas purging to the filter 10；The 4th control valve 152 can also be controlled simultaneously to close, to keep away
The acidity or alkaline environment for exempting from the liquid collecting terminal 153 impact the filter device internal duct.
Preferably, the filter device further include: ventilation shaft 161, one end are connected to the filter 10, the other end and outer
Boundary's connection, for adjusting the pressure in the filter 10；Discharge conduit 171, one end be connected to the filter 10, the other end with
External world's connection, for excluding the residual liquid in the filter 10.
Specifically, in order to further increase the expulsion efficiency of the 10 internal residual liquid of filter, to the mistake
Before 10 internal transmission purge gas of filter, can first open the 5th control valve 162 being installed in the ventilation shaft 161,
And the 6th control valve 172 being installed in the discharge conduit 171 is opened, the filter is discharged using the effect of atmospheric pressure
Most of residual liquid in 10；Then, the 5th control valve 162 and the 6th control valve 172 are closed, to the filtering
Device 10 carries out gas purging, and remaining residual liquid in the filter 10 is discharged.
The sensor 31, first control valve 112, second control valve 122, institute in present embodiment
Stating third control valve 132, the 4th control valve 152, the 5th control valve 162 and the 6th control valve 172 can be with
It is connect with the controller 30, realizes the automation control to entire filter device.
Preferably, the purge gas is nitrogen.In other specific embodiments, the purge gas may be argon
The inert gases such as gas.
Moreover, present embodiment additionally provides a kind of filter device maintaining method, and attached drawing 4 is of the invention specific
The flow chart of filter device maintaining method in embodiment, the filter device safeguarded in present embodiment can have such as figure
1- structure shown in Fig. 3.As Figure 1-Figure 4, the filter device maintaining method that present embodiment provides includes following step
It is rapid:
Step S41 provides a filter 10, and the filter 10 is for filtering liquid；
Step S42 transmits in purge gas to the filter 10, the residual liquid in the filter 10 is discharged.
The liquid of 10 internal residual of filter is discharged using the flowing of gas for present embodiment, can be accelerated
The speed that liquid is discharged from the filter 10, shortens raffinate efflux time, and then reduces the filter device period
Property maintenance or replacement filter the time it takes；Since drain age velocity is accelerated, it is contaminated to reduce pipeline in filter device
Probability；And save human resources.
Preferably, the specific steps in transmission purge gas to the filter include:
First pipe 111 is provided, the first pipe 111 is used to transmit purge gas to the filter 10, and described
There is the first control valve 112 in first pipe 111；
Detect whether to receive the purging instruction of user's sending, if so, open first control valve 112, to described
Purge gas is transmitted in filter 10.
Specifically, user can issue the purging at the interface UI of a user terminal in a manner of clicking virtual key
Instruction；After the filter device receives the purging instruction, then first control valve 112 is automatically turned on, with further letter
Change manual steps.
Preferably, the liquid to be filtered is transmitted to the filter 10, the input channel through an input channel 121
Have in 121 and whether is connected between the filter 10 and the source of supply 123 of the storage liquid to be filtered for controlling
Second control valve 122；The filtered liquid of filter 10 is transmitted through an output channel 131, the output channel 131
In have for controlling whether be connected between the filter 10 and the receiving end for receiving the filtered liquid the
Three control valves 132；Further include following steps before transmitting in purge gas to the filter 10:
Simultaneously close off second control valve 122 and the third control valve 132.
In order to avoid the purge gas impacts the other structures in the filter device, while avoiding purge gass
The leakage of body improves purging efficiency, during transmitting the purge gas to the filter 10, closes second control
Valve 122 processed and the third control valve 132.
Preferably, further include following steps before transmitting in purge gas to the filter 10:
One discharge conduit 171 is provided；
It is connected to the discharge conduit 171 and the filter 10；
The filter 10 and ambient atmosphere, remaining part in the filter 10 are connected to by a ventilation shaft 161
Liquid is discharged through the discharge conduit 171.
Preferably, the specific steps in transmission purge gas to the filter 10 include:
Simultaneously close off the discharge conduit 171 and the ventilation shaft 161；
It transmits in purge gas to the filter, is blown by the remaining liquid remaining in the filter with described
The mixture that scavenging body is constituted is expelled to the output channel.
Specifically, in order to further increase the expulsion efficiency of the 10 internal residual liquid of filter, to the mistake
Before 10 internal transmission purge gas of filter, the ventilation shaft 161 can be first passed through and be connected to the filter and ambient atmosphere,
Most of residual liquid in the filter 10 is discharged using the effect of atmospheric pressure；Then, the ventilation shaft 161 is closed
With the discharge conduit 171, gas purging is carried out to the filter 10, remaining Liquid Residue in the filter 10 is discharged
Body.
Preferably, the maintaining method of the filter device further includes following steps:
The mixture is received in output channel 131 between the third control valve 132 and the filter 10；
Separate the liquid in the mixture and the purge gas；
The liquid after separation is collected respectively with the purge gas.
Using above-mentioned steps, the purge gas and the liquid can be collected respectively, further simplified residual
Liquid recovery process improves the degree of automation of the filter device.
Preferably, the maintaining method of the filter device further includes following steps:
A second pipe 151 is provided, the second pipe 151 is used for received from the liquid separated in the mixture
Body；
Detect whether the second pipe 151 receives the liquid separated from the mixture, if it is not, then closing
First control valve 112.
Specifically, it when the second pipe 151 does not receive the liquid separated from the mixture, then says
Residual liquid in the bright filter 10 has drained, at this point it is possible to close first control valve 112, stops to the mistake
Filter 10 carries out gas purging.
In other embodiments, the maintaining method of the filter device further includes following steps:
Whether the humidity for detecting the mixture is lower than default humidity, if so, closing first control valve 112.
Preferably, closing first control valve 112 further includes later following steps:
The input channel 121, the output channel 131, the discharge conduit 171, the ventilation shaft are separated respectively
161 with the filter 10；
Replace the filter 10.
Preferably, the purge gas is nitrogen.
The filter device and its maintaining method that present embodiment provides are blown by carrying out gas to filter interior
Sweep, accelerate the velocity of discharge of filter interior residual liquid, shorten the maintenance time of filter device, reduce manpower at
This.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (20)
1. a kind of filter device characterized by comprising
Filter, including input terminal and the output end opposite with the input terminal, for the liquid inputted from the input terminal
Body is filtered；
Purging portion is used for from the input terminal to the filter transmission purge gas, by the Liquid Residue in the filter
Body is discharged from the output end.
2. filter device according to claim 1, which is characterized in that the purging portion includes:
First pipe, one end are used for for being connected to the gas source for storing the purge gas, the other end connection input terminal to institute
State purge gas described in filter transmission；
First control valve is installed in the first pipe, for controlling whether the first pipe is connected.
3. filter device according to claim 2, which is characterized in that further include:
Input channel, for the liquid to be filtered to the filter transmission；
Second control valve is installed in the input channel, for controlling the filter and storing the liquid to be filtered
Source of supply between whether be connected to.
4. filter device according to claim 3, which is characterized in that further include:
Output channel is used for transmission the filtered liquid；
Third control valve is installed in the output channel, for controlling the filter and being used to receive filtered described
Whether it is connected between the receiving end of liquid.
5. filter device according to claim 4, which is characterized in that further include:
Collection portion is connect with the output channel between the third control valve and the output end, for collected from described
The mixture being made of the remaining liquid and the purge gas being discharged in filter.
6. filter device according to claim 5, which is characterized in that the collection portion includes:
Gas-liquid separator is connected to the output channel, for separating the liquid and the purge gas from the mixture；
Gas collection end connects the gas-liquid separator, for collecting the purge gas after separating；
Liquid collecting terminal connects the gas-liquid separator, for collecting the liquid after separating.
7. filter device according to claim 6, which is characterized in that the collection portion further include:
Second pipe, one end is connected to the gas-liquid separator, the other end is connected to the liquid collecting terminal；
4th control valve is installed in the second pipe, for controlling whether the second pipe is connected.
8. filter device according to claim 7, which is characterized in that the collection portion further include:
Sensor is installed in the second pipe between the 4th control valve and the gas-liquid separator, described for detecting
Whether second pipe receives the liquid through the gas-liquid separator separates；
Control unit connects the sensor and first control valve, for determining that the second pipe do not receive through institute
After the liquid for stating gas-liquid separator separates, first control valve is closed.
9. filter device according to claim 1, which is characterized in that further include:
Ventilation shaft, one end is connected to the filter, the other end is in communication with the outside, for adjusting the pressure in the filter；
Discharge conduit, one end is connected to the filter, the other end is in communication with the outside, remaining in the filter for excluding
The liquid.
10. filter device according to claim 1, which is characterized in that the purge gas is nitrogen.
11. a kind of filter device maintaining method, which comprises the steps of:
A filter is provided, the filter is for filtering liquid；
It transmits in purge gas to the filter, the residual liquid in the filter is discharged.
12. filter device maintaining method according to claim 11, which is characterized in that transmission purge gas to the filtering
Specific steps in device include:
First pipe is provided, the first pipe to the filter transmission purge gas, and in the first pipe for having
There is the first control valve；
Detect whether that the purging for receiving user's sending instructs, if so, first control valve is opened, into the filter
Transmit purge gas.
13. filter device maintaining method according to claim 12, which is characterized in that the liquid to be filtered is defeated through one
Enter pipeline and be transmitted to the filter, has in the input channel for controlling to be filtered described of the filter and storage
The second control valve whether being connected between the source of supply of liquid；The filtered liquid of filter is passed through an output channel
It is defeated, have between the receiving end for controlling the filter and for receiving the filtered liquid in the output channel
The third control valve whether being connected to；Further include following steps before transmitting in purge gas to the filter:
Simultaneously close off second control valve and the third control valve.
14. filter device maintaining method according to claim 13, which is characterized in that transmission purge gas to the filtering
Further include following steps before in device:
One discharge conduit is provided；
It is connected to the discharge conduit and the filter；
It is connected to the filter and ambient atmosphere by a ventilation shaft, remaining partially liq is through the row in the filter
Let out pipeline discharge.
15. filter device maintaining method according to claim 14, which is characterized in that transmission purge gas to the filtering
Specific steps in device include:
Simultaneously close off the discharge conduit and the ventilation shaft；
It transmits in purge gas to the filter, is made of remaining residual liquid in the filter with the purge gas
Mixture be expelled to the output channel.
16. filter device maintaining method according to claim 15, which is characterized in that further include following steps:
The mixture is received in output channel between the third control valve and the filter；
Separate the liquid in the mixture and the purge gas；
The liquid after separation is collected respectively with the purge gas.
17. filter device maintaining method according to claim 16, which is characterized in that further include following steps:
A second pipe is provided, the second pipe is used for received from the liquid separated in the mixture；
Detect whether the second pipe receives the liquid separated from the mixture, if it is not, then closing described
One control valve.
18. filter device maintaining method according to claim 16, which is characterized in that further include following steps:
Whether the humidity for detecting the mixture is lower than default humidity, if so, closing first control valve.
19. filter device maintaining method described in 7 or 18 according to claim 1, which is characterized in that close first control valve
Later further include following steps:
The input channel, the output channel, the discharge conduit, the ventilation shaft and the filter are separated respectively；
Replace the filter.
20. filter device maintaining method according to claim 11, which is characterized in that the purge gas is nitrogen.
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| CN201811129902.XA CN108993015A (en) | 2018-09-27 | 2018-09-27 | Filter device and its maintaining method |
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| CN201811129902.XA CN108993015A (en) | 2018-09-27 | 2018-09-27 | Filter device and its maintaining method |
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| WO2024081241A1 (en) * | 2022-10-10 | 2024-04-18 | Johnson Controls Tyco IP Holdings LLP | Process liquid filter system for hvac&r system |
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