Filter screen device and liquid separator

Abstract

According to the filter screen device and the liquid dispenser, the filter screen device is arranged in the liquid dispenser, the filter screen support is arranged close to the air inlet, and the rotating assembly and the filter screen assembly are overlapped and installed on the filter screen support together to achieve interference fit, so that a refrigerant entering the liquid dispenser can be filtered through the filter screen assembly, and the refrigerant entering the liquid dispenser can be filtered through the filter screen support. And the rotating assembly can be rotated to enable the second shielding part to rotate between the filter screen and the first shielding part, so that the shielding area of the filter screen is increased or decreased, the filtering area of the filter screen is adjusted, and the liquid separator can adapt to different operation working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid separators, and in particular to a filter device and a liquid separator. Background Art

[0002] The liquid separator is also called a gas-liquid separator. A filtering device is provided inside the liquid separator, through which the gas-liquid mixture of the refrigerant can be separated. The separated gas refrigerant enters the pump body through the steel pipe and the bent pipe, while the small amount of separated liquid refrigerant and the mixed lubricating oil are accumulated at the bottom of the liquid separator to prevent the liquid mixture from entering the pump body.

[0003] In actual applications, the flow state and oil content of the refrigerant are different under different working conditions. The filter area of ​​the filter device needs to be controlled according to the operating conditions to control the return oil volume. However, the filter area of ​​the filter device of the existing liquid distributor is fixed and cannot be adjusted. Summary of the invention

[0004] The present invention provides a filter device and a liquid separator, aiming to solve the problem that the filter device of the existing liquid separator cannot adjust the filter area.

[0005] An embodiment of the present invention provides a filter device, which is used in a liquid dispenser. The filter device includes a filter assembly, a filter bracket and a rotating assembly. The filter bracket is arranged near the air inlet of the liquid dispenser. The filter assembly and the rotating assembly are both installed on the filter bracket. The filter assembly includes a filter and a first shielding portion connected to the filter. A second shielding portion is arranged on the rotating assembly. The rotating assembly can rotate on the filter assembly to drive the second shielding portion to rotate between the filter and the first shielding portion to increase or decrease the shielding area of ​​the filter.

[0006] Specifically, the filter bracket is an annular bracket, the filter bracket is arranged in the inner wall of the liquid distributor, the filter bracket is circumferentially provided with an annular mounting groove, and the filter assembly and the rotating assembly are both installed in the annular mounting groove.

[0007] Specifically, the filter assembly also includes an annular base and a conical shielding portion, the annular base is installed in the annular installation groove, the first shielding portion and the filter form an annular structure arched toward the air inlet, the bottom of the annular structure is connected to the annular base, and the conical shielding portion has a pointed end and a flared end, the pointed end faces the air inlet, and the flared end is connected to the top of the annular structure.

[0008] Specifically, the rotating assembly includes an annular mounting portion, the annular mounting portion is mounted in the annular mounting groove, and the second shielding portion is arranged on the annular mounting portion;

[0009] A first arc-shaped adjustment groove is circumferentially arranged on the outer side of the filter bracket, and an adjustment portion is arranged on the outer side of the annular mounting portion. The adjustment portion is connected to the first arc-shaped adjustment groove and can slide in the first arc-shaped adjustment groove to drive the annular mounting portion to rotate.

[0010] Specifically, the liquid dispenser is provided with a second arc-shaped adjustment groove corresponding to the position of the first arc-shaped adjustment groove, and the adjustment portion passes through the first arc-shaped adjustment groove and the second arc-shaped adjustment groove in sequence and extends to the outside of the liquid dispenser.

[0011] Specifically, the filter device also includes an electromagnetic component, which includes a first magnetic component and a second magnetic component. The first magnetic component is installed at one end extending from the adjusting part, and the second magnetic component is arranged on the outside of the liquid dispenser corresponding to the first magnetic component and is connected to an external power supply. The second magnetic component is a variable polarity magnetic component. The external power supply can pass current in different directions to change the polarity of the second magnetic component, so that the magnetic field force between the second magnetic component and the first magnetic component attracts or repels each other, so as to drive the adjusting part to rotate along the first arc-shaped adjustment groove and the second arc-shaped adjustment groove.

[0012] Specifically, the filter device further includes a pressure sensor disposed on the filter support, and the pressure sensor is used to detect the pressure of the filter assembly.

[0013] Specifically, the filter is made of oleophobic material.

[0014] Specifically, the surface of the filter screen has a micro-nano composite structure and is modified by heptadecafluorodecyltrimethoxysilane.

[0015] An embodiment of the present invention further provides a liquid separator, comprising a liquid separator body and the filter device as described above disposed in the liquid separator body.

[0016] An embodiment of the present invention provides a filter device and a liquid separator, wherein the filter device is arranged inside the liquid separator, and the filter bracket is arranged near the air inlet, and the rotating assembly and the filter assembly are overlapped and installed together on the filter bracket to achieve an interference fit, so that the filter assembly can filter the refrigerant entering the liquid separator to separate the gas-liquid mixture of the refrigerant, and the rotating assembly can also be rotated to rotate the second shielding part between the filter and the first shielding part, so that the shielding area of ​​the filter is increased or decreased, thereby adjusting the filtering area of ​​the filter so that the liquid separator can adapt to different operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of a filter device provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of a filter device provided in an embodiment of the present invention installed in a liquid separator;

[0020] Figure 3 A schematic diagram of the structure of a filter assembly provided in an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the structure of a filter support provided by an embodiment of the present invention;

[0022] Figure 5 for Figure 4 A magnified view of the structure in middle B;

[0023] Figure 6 A schematic diagram of the refrigerant flow provided by an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of the structure of a rotating assembly provided in an embodiment of the present invention;

[0025] Figure 8 Schematic diagram of the filtration area of ​​the filter device provided in the embodiment of the present invention Figure 1 ;

[0026] Fig. 9 Schematic diagram of the filtration area of ​​the filter device provided in the embodiment of the present invention Figure 2 ;

[0027] Fig.10 for Figure 2 A magnified view of the structure of A;

[0028] Fig.11 An external structural diagram of a liquid dispenser provided in an embodiment of the present invention;

[0029] Fig.12 A schematic structural diagram of a first magnetic component provided in an embodiment of the present invention.

[0030] Description of the symbols in the figure:

[0031] 1. Filter device; 11. Filter assembly; 111. Filter; 112. First shielding part; 113. Ring base; 114. Conical shielding part; 12. Filter bracket; 121. Ring mounting groove; 122. First arc-shaped adjustment groove; 13. Rotating assembly; 131. Second shielding part; 132. Ring mounting part; 133. Adjustment part; 134. Connecting part; 14. Electromagnetic assembly; 141. First magnetic part; 1411. Connecting hole; 142. Second magnetic part; 15. Pressure sensor;

[0032] 2. Liquid distributor; 21. Liquid distributor body; 22. Air inlet; 23. Second arc-shaped adjustment groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0035] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0036] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0037] See also Figure 1-Figure 3The embodiment of the present invention provides a filter device 1, which is applied to a liquid dispenser 2. The filter device 1 includes a filter assembly 11, a filter bracket 12 and a rotating assembly 13. The filter bracket 12 is arranged near the air inlet 22 of the liquid dispenser 2. The filter assembly 11 and the rotating assembly 13 are both installed on the filter bracket 12. The filter assembly 11 includes a filter 111 and a first shielding portion 112 connected to the filter 111. A second shielding portion 131 is arranged on the rotating assembly 13. The rotating assembly 13 can rotate on the filter assembly 11 to drive the second shielding portion 131 to rotate between the filter 111 and the first shielding portion 112 to increase or decrease the shielding area of ​​the filter 111.

[0038] In this embodiment, the refrigerant enters from the air inlet 22, the filter device 1 is arranged inside the liquid separator 2, and the filter bracket 12 is arranged near the air inlet 22, so that the filter device 1 can filter the refrigerant entering the liquid separator 2 to separate the gas-liquid mixture of the refrigerant. The filter device 1 of this embodiment includes a filter assembly 11, a filter bracket 12 and a rotating assembly 13. The rotating assembly 13 overlaps with the filter assembly 11 and is installed together on the filter bracket 12 to realize the connection between the three. The connection method can be an interference fit to ensure that it does not fall off during use. At the same time, since the rotating assembly 13 needs to be rotated, the interference fit should be a slight interference fit so that the rotating assembly 13 can be rotated by other means. By rotating the rotating assembly 13 to rotate the second shielding portion 131 between the filter 111 and the first shielding portion 112, The blocking area of ​​the filter 111 increases or decreases, thereby adjusting the filtering area of ​​the filter 111, that is, when the blocking area of ​​the filter 111 increases, the filtering area decreases, and when the blocking area of ​​the filter 111 decreases, the filtering area increases, wherein the maximum blocking area is the sum of the areas of the first blocking portion 112 and the second blocking portion 131. At this time, the entire second blocking portion 131 is located on the filter 111, and the minimum blocking area is the area of ​​the first blocking portion 112 or the second blocking portion 131. At this time, the second blocking portion 131 overlaps with the first blocking portion 112. During the rotation of the rotating component 13 of the present embodiment, the position of the filter 111 corresponding to the second blocking portion 131 is blocked, and the refrigerant cannot flow into the filter 111 from this position, and can only flow to other positions of the filter 111. That is, the second blocking portion 131 changes the flow direction of the refrigerant and can increase or decrease the filtration area of ​​the filter 111 according to the operating conditions, so that the liquid separator 2 can be suitable for different application scenarios, thereby improving the applicability of the liquid separator 2.

[0039] Specifically, Figure 4 As shown, the filter support 12 is an annular support, which is arranged in the inner wall of the liquid distributor 2 . The filter support 12 is provided with an annular mounting groove 121 along the circumferential direction, and the filter assembly 11 and the rotating assembly 13 are both installed in the annular mounting groove 121 .

[0040] In this embodiment, the liquid distributor 2 is a cylindrical container with a chamber, and the filter support 12 is an annular support to fit the inner wall contour of the liquid distributor 2, so that the installation of the filter support 12 is more stable, wherein the filter support 12 can be installed in the inner wall of the liquid distributor 2 by welding, threaded connection or snap-on fixing, etc., to ensure that it will not be displaced or fall off during use. The annular mounting groove 121 is evenly opened along the circumference of the filter support 12, and its depth and width are precisely designed according to the size of the filter assembly 11 and the rotating assembly 13, so that both can be stably and tightly installed in the annular mounting groove 121. The filter assembly 11 of this embodiment is stably installed in the liquid distributor 2 through the annular mounting groove 121, and is arranged close to the air inlet 22 of the liquid distributor 2, so that the filter assembly 11 can fully receive the refrigerant of the air inlet 22 and filter the refrigerant, and the rotating assembly 13 can also rotate on the filter assembly 11, so that the filtering area of ​​the filter assembly 11 changes, thereby adapting to the amount of refrigerant required under different operating conditions.

[0041] Specifically, Figure 2 and Figure 3 As shown, the filter assembly 11 also includes an annular base 113 and a conical shielding portion 114. The annular base 113 is installed in the annular installation groove 121. The first shielding portion 112 and the filter 111 form an annular structure arched toward the air inlet. The bottom of the annular structure is connected to the annular base 113. The conical shielding portion 114 has a pointed end and a flared end. The pointed end faces the air inlet 22, and the flared end is connected to the top of the annular structure.

[0042] In this embodiment, the filter assembly 11 includes a filter 111, a first shielding portion 112, an annular base 113 and a conical shielding portion 114. The filter 111 and the first shielding portion 112 form an annular structure. The bottom of the annular structure is adapted to the shape of the annular base 113 and is connected to the annular base 113. The top of the annular structure is adapted to the shape of the flared end of the conical shielding portion 114 and is connected to the flared end of the conical shielding portion 114. The tip of the conical shielding portion 114 faces the air inlet 22, so that the entire filter assembly 11 forms a conical structure after assembly. The shape of the annular base 113 is adapted to the annular mounting groove 121, and the filter assembly 11 is installed in the annular mounting groove 121 through the annular base 113. The conical shielding portion 114 of the filter assembly 11 forms a flow channel with low flow resistance with the inner wall of the liquid distributor 2. The tip of the conical shielding portion 114 changes the flow direction of the refrigerant flowing from the air inlet 22 into the liquid distributor 2 with the minimum local resistance, so that the refrigerant passes through the filter 111 evenly along the formed flow channel. The refrigerant flow diagram is shown in FIG. Figure 6As shown, this design changes the filtering surface from the circular tubular surface of the air inlet pipe to a circular annular surface, which not only increases the effective filtering area, but also evenly disperses the flow of the refrigerant at the air inlet 22 through the flow channel, reduces the impact force of the refrigerant directly acting on the filter 111, avoids the backflow of the refrigerant in the upper part of the liquid distributor 2, and reduces the pressure loss and pulsation of the refrigerant.

[0043] Specifically, Figure 7-9 As shown, the rotating assembly 13 includes an annular mounting portion 132, the annular mounting portion 132 is installed in the annular mounting groove 121, and the second shielding portion 131 is disposed on the annular mounting portion 132;

[0044] A first arc-shaped adjusting groove 122 is circumferentially provided on the outer side of the filter bracket 12 , and an adjusting portion 133 is provided on the outer side of the annular mounting portion 132 . The adjusting portion 133 is connected to the first arc-shaped adjusting groove 122 and can slide in the first arc-shaped adjusting groove 122 to drive the annular mounting portion 132 to rotate.

[0045] In this embodiment, the rotating component 13 includes a second shielding portion 131, an annular mounting portion 132 and an adjusting portion 133. The second shielding portion 131 is arranged on the annular mounting portion 132. The shape of the annular mounting portion 132 is adapted to the shape of the annular mounting groove 121. The annular mounting portion 132 is installed in the annular mounting groove 121 to ensure that the rotating component 13 can be firmly connected to the filter bracket 12. The adjusting portion 133 is arranged on the outer side of the annular mounting portion 132. The first arc-shaped adjustment groove 122 is arranged on the outer side along the circumference of the filter bracket 12. The adjusting portion 133 is connected to the first arc-shaped adjustment groove 122. The adjusting portion 133 can slide in the first arc-shaped adjustment groove 122, thereby driving the annular mounting portion 132 to rotate, so that the second shielding portion 131 rotates between the first shielding portion 112 and the filter 111. The second shielding portion 131 cooperates with the first shielding portion 112 to increase or decrease the shielding area of ​​the filter, thereby adjusting the filtering area of ​​the filter 111. In a specific implementation, the arc of the first arc-shaped adjustment groove 122 is preferably set to 90° ( Figure 4 a), so that when the adjusting portion 133 rotates, the second shielding portion 131 can be completely rotated onto the filter screen 111 ( Fig. 9 a) or overlapped on the first shielding portion 112 ( Figure 8a). In addition, during the assembly process of the rotating assembly 13 and the filter assembly 11, the annular mounting portion 132 of the rotating assembly 13 and the annular base 113 of the filter assembly 11 are both installed in the annular mounting groove 121. In order to save installation space and enable the second shielding portion 131 to slide with less resistance, the two need to be overlapped together and then installed on the annular mounting groove 121. The overlapping method can be that the second shielding portion 131 is overlapped on the first shielding portion 112 and the filter 111, that is, the diameter of the annular base 113 is smaller than the diameter of the annular mounting portion 132, and the annular base 113 is located on the annular mounting groove 121. The inner circle of the annular mounting portion 132, the setting height of the second shielding portion 131 is slightly higher than the annular structure formed by the first shielding portion 112 and the filter 111, and a connecting portion 134 can be set on the annular mounting portion 132, and then the second shielding portion 131 is installed on the connecting portion 134 to achieve overlapping. After the filter assembly 11 and the filter bracket 12 are assembled, the adjusting portion 133 is welded to the outer side of the annular mounting portion 132 through the first arc-shaped adjusting groove 122, and the sliding adjusting portion 133 can drive the second shielding portion 131 to rotate, so as to adjust the filtering area of ​​the filter 111.

[0046] Specifically, Figure 10-11 As shown, the liquid dispenser 2 is provided with a second arc-shaped adjusting groove 23 corresponding to the position of the first arc-shaped adjusting groove 122 , and the adjusting portion 133 passes through the first arc-shaped adjusting groove 122 and the second arc-shaped adjusting groove 23 in sequence and extends to the outside of the liquid dispenser 2 .

[0047] In this embodiment, the filter device 1 is installed on the inner wall of the liquid distributor 2. In order to adjust the filtering area of ​​the filter device 1, it is preferred to set a second arc-shaped adjustment groove 23 at the position of the liquid distributor 2 corresponding to the first arc-shaped adjustment groove 122, so that the adjustment part 133 extends out of the second arc-shaped adjustment groove 23, so as to rotate the rotating component 13, thereby realizing the rotation of the second shielding part 131.

[0048] Specifically, Figure 10-11 As shown, the filter device 1 also includes an electromagnetic component 14, which includes a first magnetic component 141 and a second magnetic component 142. The first magnetic component 141 is installed at one end of the adjusting portion 133 that extends out, and the second magnetic component 142 is arranged on the outside of the liquid dispenser 2 corresponding to the first magnetic component 141 and is connected to an external power supply. The second magnetic component 142 is a variable polarity magnetic component. The external power supply can pass current in different directions to change the polarity of the second magnetic component 142, so that the magnetic field force between the second magnetic component 142 and the first magnetic component 141 attracts or repels each other, so as to drive the adjusting portion 133 to rotate along the first arc-shaped adjusting groove 122 and the second arc-shaped adjusting groove 23.

[0049] In the aforementioned embodiment, the rotation of the rotating assembly 13 can be independently provided with a driving assembly, and the rotating assembly 13 can be directly driven to rotate by the driving assembly. In the present embodiment, the rotation of the rotating assembly 13 is realized by the electromagnetic assembly 14. In the specific implementation, the rotating assembly 13 is installed in the annular mounting groove 121 as an interference fit, and the adjusting portion 133 extends out of the dispenser 2. When the adjusting portion 133 is rotated, a certain external force is required to overcome the contact friction between the rotating assembly 13 and the annular mounting groove 121. Therefore, the first magnetic member 141 is installed at the end extending from the adjusting portion 133, that is, a connecting hole 1411 is provided at the position of the first magnetic member 141 corresponding to the adjusting portion 133 (refer to Fig.12 ), the connecting hole 1411 is connected to the protruding end of the adjusting portion 133, the second magnetic member 142 is arranged on the outside of the liquid dispenser 2 corresponding to the position of the first magnetic member 141, and the second magnetic member 142 is connected to the external power supply. When the power is turned on, a magnetic field force is generated between the two magnetic members, so that the adjusting portion 133 can overcome the contact friction between the rotating component 13 and the annular mounting groove 121 to realize rotation. By changing the direction of the current, the rotation direction of the adjusting portion 133 can be controlled, thereby realizing the adjustment of the filtering area of ​​the filter screen 111.

[0050] In a specific implementation, the second magnetic member 142 is a variable polarity magnetic member. The polarity of the second magnetic member 142 can be changed by passing current, the duration of the current and the direction of the current through the variable polarity magnetic member. Through the principle of electromagnetic induction, the magnetism is generated during the time of power-on, and the variable polarity magnetic member and the first magnetic member 141 generate an attractive or repulsive magnetic field force. When the magnetic field force Fc is greater than the friction force f between the rotating assembly 13 and the filter support 12, the rotating assembly 13 undergoes a rotational displacement with the central axis of the dispenser 2 as the axial direction during the power-on period, so that the position of the second shielding portion 131 of the rotating assembly 13 changes, thereby achieving the adjustment of the shielding area of ​​the filter 111. It is defined that when a positive current i is passed, the magnetic field force Fc between the two magnetic members is an attractive force, that is, the polarity of the variable polarity magnetic member is opposite to that of the first magnetic member 141. When a reverse current -i is passed, the magnetic field force Fc between the two magnetic members is a repulsive force, and the polarity of the variable polarity magnetic member is the same as that of the first magnetic member 141.

[0051] Specifically, Figure 4 As shown, the filter device 1 further includes a pressure sensor 15 disposed on the filter support 12 , and the pressure sensor 15 is used to detect the pressure of the filter assembly 11 .

[0052] In this embodiment, under different operating conditions of the liquid dispenser 2, the filter 111 will be subjected to different pressures and deform to different degrees, and the different deformation sizes need to be detected by the pressure sensor 15. Preferably, the pressure sensor 15 is set in the annular mounting groove 121, and can be set at a height away from the annular base 113 and the annular mounting portion 132, so that when the rotating component 13 rotates, the pressure sensor 15 cannot be squeezed, and then the filtering area of ​​the filter assembly 11 is controlled according to the data detected by the pressure sensor 15.

[0053] In the specific implementation, the pressure sensor 15 is used in conjunction with the electromagnetic component 14, that is, the input direction of the current is controlled according to the data detected by the pressure sensor 15, thereby controlling the rotation direction of the regulating part 133. The specific steps are: 1. Connect the dispenser 2 to the test system, and run it for a time T, and run multiple working conditions m(T) with different loads to obtain a series of pressure values ​​P(T) of the pressure sensor under these working conditions, fit these data, and obtain a pressure and working condition curve P=f(m); 2. By testing different power-on times t (ensuring that the power-on current is large enough to allow the regulating part 133 to rotate), the rotation angle of the rotating component 13 is φ, and the t=g(φ) curve is obtained; 3. According to the expected filtration area under each working condition, define the function φ=h(m); 4. According to the specified monitoring time interval ΔT and the ΔP expected to change in this interval (that is, determine that the working condition m changes), define I(ΔP, ΔT), where I∈(-i, i); Integrate the above four functions to obtain t=(g(h(arc f(P))), I(ΔP, ΔT)) curves are constructed to complete the modeling, where the first input controls the power-on time, and the second input controls whether power-on is required and the power-on direction.

[0054] Under the current working condition, when the inflowing refrigerant flow rate increases from large to small, the first magnetic part 141 is attracted to overcome friction and sliding, driving the adjusting part 133 of the rotating component 13, so that the second blocking part 131 and the filter screen 111 partially overlap, thereby increasing the filtering area and improving the oil separation efficiency; when the inflowing refrigerant flow rate increases from small to large, the first magnetic part 141 is repelled to overcome friction and sliding, driving the adjusting part 133 of the rotating component 13, so that the second blocking part 131 gradually blocks the filter screen 111, thereby reducing the filtering area, increasing the flow rate of the refrigerant, and reducing the pressure loss and pulsation.

[0055] Specifically, the filter screen 111 is made of oleophobic material.

[0056] In this embodiment, since some lubricating oil is mixed in the refrigerant, in order to filter this part of the lubricating oil, it is preferably made of oleophobic material to make the filter 111, so that the lubricating oil in the refrigerant cannot pass through the filter 111 into other positions of the liquid distributor 2, thereby achieving an efficient filtering effect.

[0057] Specifically, the surface of the filter screen 111 has a micro-nano composite structure and is modified by using heptadecafluorodecyltrimethoxysilane.

[0058] In this embodiment, the filter screen 111 of this embodiment is obtained by modifying the existing stainless steel filter screen, so that the surface of the filter screen 111 has a micro-nano composite structure, wherein the specific steps of the modification are: 1. The stainless steel filter screen is sequentially ultrasonically cleaned with petroleum ether, anhydrous ethanol and deionized water for a period of time (the treatment time can be 10 minutes), and then blown dry with high-pressure nitrogen to ensure that there is no impurity on the surface of the stainless steel filter screen to be treated; 2. The stainless steel filter screen after ultrasonic cleaning is placed in a hydrochloric acid solution of a predetermined concentration (the predetermined concentration can be 1 mol / L) to remove the oxide film of the stainless steel filter screen; 3. Then placed in trichloroethylene The method comprises the following steps: etching in a ferric chloride solution for a period of time (the etching time can be 2 hours) and calcining in a muffle furnace for a period of time (the calcination time can be 2 hours) to form a metal oxide film (i.e., a micro-nano composite structure) on the surface of the stainless steel filter; 4. placing the filtrate in a polytetrafluoroethylene box containing a predetermined content (which can be 20 microliters) of heptadecafluorodecyltrimethoxysilane, keeping it warm at a predetermined temperature (which can be 150°C) for a period of time (the keeping time can be 3 hours), and then performing a dehydration condensation reaction to generate Si-OH groups, and finally bonding a layer of heptadecafluorodecyltrimethoxysilane molecular film on its surface, which can realize the oleophobic function.

[0059] like Figure 2 and Fig.11 As shown, an embodiment of the present invention further provides a liquid dispenser 2, comprising a liquid dispenser body 21 and the filter device 1 as described above disposed in the liquid dispenser body 21.

[0060] In this embodiment, by disposing the filter device 1 in the liquid distributor body 21, the filter area can be adjusted according to the operating conditions.

[0061] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A filter device, used in a liquid dispenser, characterized in that: The filter device includes a filter assembly, a filter bracket and a rotating assembly. The filter bracket is arranged near the air inlet of the dispenser. The filter assembly and the rotating assembly are both installed on the filter bracket. The filter assembly includes a filter and a first shielding portion connected to the filter. A second shielding portion is arranged on the rotating assembly. The rotating assembly can rotate on the filter assembly to drive the second shielding portion to rotate between the filter and the first shielding portion to increase or decrease the shielding area of ​​the filter.

2. The filter device according to claim 1, characterized in that: The filter support is an annular support, the filter support is arranged in the inner wall of the liquid distributor, the filter support is provided with an annular mounting groove along the circumference, and the filter assembly and the rotating assembly are both installed in the annular mounting groove.

3. The filter device according to claim 2, characterized in that: The filter assembly also includes an annular base and a conical shielding portion, the annular base is installed in the annular installation groove, the first shielding portion and the filter form an annular structure arched toward the air inlet, the bottom of the annular structure is connected to the annular base, and the conical shielding portion has a pointed end and a flared end, the pointed end faces the air inlet, and the flared end is connected to the top of the annular structure.

4. The filter device according to claim 3, characterized in that: The rotating assembly comprises an annular mounting portion, the annular mounting portion is mounted in the annular mounting groove, and the second shielding portion is arranged on the annular mounting portion; A first arc-shaped adjustment groove is circumferentially arranged on the outer side of the filter bracket, and an adjustment portion is arranged on the outer side of the annular mounting portion. The adjustment portion is connected to the first arc-shaped adjustment groove and can slide in the first arc-shaped adjustment groove to drive the annular mounting portion to rotate.

5. The filter device according to claim 4, characterized in that: The liquid dispenser is provided with a second arc-shaped adjustment groove corresponding to the position of the first arc-shaped adjustment groove, and the adjustment portion passes through the first arc-shaped adjustment groove and the second arc-shaped adjustment groove in sequence and extends to the outside of the liquid dispenser.

6. The filter device according to claim 5, characterized in that: The filter device also includes an electromagnetic component, which includes a first magnetic component and a second magnetic component. The first magnetic component is installed at one end of the adjusting portion extending outward, and the second magnetic component is arranged on the outside of the liquid dispenser corresponding to the first magnetic component and is connected to an external power supply. The second magnetic component is a variable polarity magnetic component. The external power supply can pass current in different directions to change the polarity of the second magnetic component, so that the magnetic field force between the second magnetic component and the first magnetic component attracts or repels each other, so as to drive the adjusting portion to rotate along the first arc-shaped adjusting groove and the second arc-shaped adjusting groove.

7. The filter device according to claim 1, characterized in that: The filter device further comprises a pressure sensor arranged on the filter support, and the pressure sensor is used to detect the pressure of the filter assembly.

8. The filter device according to claim 1, characterized in that: The filter is made of oleophobic material.

9. The filter device according to claim 8, characterized in that: The surface of the filter screen has a micro-nano composite structure and is obtained by modification with heptadecafluorodecyltrimethoxysilane.

10. A liquid dispenser, characterized in that: It comprises a liquid separator body and a filter device as claimed in any one of claims 1 to 9 arranged in the liquid separator body.

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