A strainer device and a distributor

Abstract

The embodiment of the present application provides a filter screen device and a liquid distributor, the filter screen device is arranged in the liquid distributor, the filter screen support is arranged close to an air inlet, a rotating assembly is overlapped with a filter screen assembly and is installed on the filter screen support to realize interference fit, so that the filter screen assembly can filter refrigerant entering the liquid distributor, the gas-liquid mixture of the refrigerant is separated, and the rotating assembly can be rotated to rotate a second shielding part between the filter screen and a first shielding part, so that the shielding area of the filter screen is increased or reduced, thereby adjusting the filtering area of the filter screen, so that the liquid distributor can adapt to different operation conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of a liquid separator, in particular to a filter screen device and a liquid separator. BACKGROUND

[0002] The liquid separator is also called a gas-liquid separator, and a filter device is arranged in the liquid separator. The filter device can separate a gas-liquid mixture of refrigerant, the separated gas refrigerant enters a pump body through a steel pipe and an elbow pipe, and a small amount of separated liquid refrigerant and 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 application, the flow state and oil content of the refrigerant are different under different working conditions. The filtering area of the filter device needs to be controlled to control the oil return amount according to the operating conditions. However, the filtering area of the filter device of the existing liquid separator is fixed and cannot be adjusted. SUMMARY

[0004] The present application provides a filter screen device and a liquid separator, which aims to solve the problem that the filtering area of the filter device of the existing liquid separator cannot be adjusted.

[0005] The present application provides a filter screen device, which is applied to a liquid separator. The filter screen device comprises a filter screen assembly, a filter screen support and a rotating assembly. The filter screen support is arranged close to an air inlet of the liquid separator. The filter screen assembly and the rotating assembly are both mounted on the filter screen support. The filter screen assembly comprises a filter screen and a first shielding part connected with the filter screen. The rotating assembly is provided with a second shielding part. The rotating assembly can rotate on the filter screen assembly to drive the second shielding part to rotate between the filter screen and the first shielding part, so as to increase or decrease the shielding area of the filter screen.

[0006] Specifically, the filter screen support is an annular support. The filter screen support is arranged in an inner wall of the liquid separator. The filter screen support is provided with an annular mounting groove in the circumferential direction. The filter screen assembly and the rotating assembly are both mounted in the annular mounting groove.

[0007] Specifically, the filter screen assembly further comprises an annular base and a conical shielding part. The annular base is mounted in the annular mounting groove. The first shielding part and the filter screen form an annular structure which is arched towards the air inlet. The bottom of the annular structure is connected to the annular base. The conical shielding part has a pointed end and an expanded end. The pointed end is directed towards the air inlet. The expanded end is connected to the top of the annular structure.

[0008] Specifically, the rotating assembly comprises an annular mounting part. The annular mounting part is mounted in the annular mounting groove. The second shielding part is arranged on the annular mounting part.

[0009] The outer side of the filter screen support is provided with a first arc-shaped adjusting groove in the circumferential direction, and the outer side of the annular mounting portion is provided with an adjusting portion connected to and slidable in the first arc-shaped adjusting groove to drive the annular mounting portion to rotate.

[0010] Specifically, the distributor is provided with a second arc-shaped adjusting groove corresponding to the position of the first arc-shaped adjusting groove, and the adjusting portion sequentially passes through the first arc-shaped adjusting groove and the second arc-shaped adjusting groove and extends to the outside of the distributor.

[0011] Specifically, the filter screen device further comprises an electromagnetic assembly, the electromagnetic assembly comprises a first magnetic member and a second magnetic member, the first magnetic member is installed at one end of the adjusting portion, the second magnetic member is provided outside the distributor corresponding to the first magnetic member and connected with an external power supply, the second magnetic member is a variable polarity magnetic member, the external power supply can pass different direction currents to change the polarity of the second magnetic member, so that the magnetic field force between the second magnetic member and the first magnetic member is attracted or repelled, to drive the adjusting portion to rotate along the first arc-shaped adjusting groove and the second arc-shaped adjusting groove.

[0012] Specifically, the filter screen device further comprises a pressure sensor provided on the filter screen support, and the pressure sensor is used for detecting the pressure of the filter screen assembly.

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

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

[0015] The embodiment of the present application also provides a distributor comprising a distributor body and a filter screen device as described above arranged in the distributor body.

[0016] The embodiment of the present application provides a filter screen device and a distributor, the filter screen device is arranged inside the distributor, and the filter screen support is arranged close to the air inlet, the rotating assembly is combined with the filter screen assembly and is installed on the filter screen support to realize interference fit, so that the filter screen assembly can filter the refrigerant entering the inside of the distributor to separate the gas-liquid mixture of the refrigerant, and the rotating assembly can also be rotated to rotate the second shielding portion between the filter screen and the first shielding portion, so that the shielding area of the filter screen is increased or decreased, thereby adjusting the filtering area of the filter screen, so that the distributor can adapt to different operating conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0019] Figure 2 This is a schematic diagram of the filter device installed inside the liquid separator according to an embodiment of the present invention;

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

[0021] Figure 4 This is a schematic diagram of the structure of the filter support provided in an embodiment of the present invention;

[0022] Figure 5 for Figure 4 Enlarged view of the B-structure;

[0023] Figure 6 This is a schematic diagram of refrigerant flow provided in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the rotating component provided in an embodiment of the present invention;

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

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

[0027] Figure 10 for Figure 2 Enlarged view of the A structure;

[0028] Figure 11 This is an external structural diagram of the liquid dispenser provided in an embodiment of the present invention;

[0029] Figure 12 This is a schematic diagram of the structure of the first magnetic component provided in an embodiment of the present invention.

[0030] Explanation of the markings in the image:

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

[0032] 2. Dispenser; 21. Dispenser body; 22. Air inlet; 23. Second arc-shaped adjustment groove. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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 "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

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

[0036] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] Please see Figures 1-3This invention provides a filter device 1, which is applied in a liquid dispenser 2. The filter device 1 includes a filter assembly 11, a filter support 12, and a rotating assembly 13. The filter support 12 is disposed near the air inlet 22 of the liquid dispenser 2. The filter assembly 11 and the rotating assembly 13 are both mounted on the filter support 12. The filter assembly 11 includes a filter 111 and a first blocking part 112 connected to the filter 111. The rotating assembly 13 is provided with a second blocking part 131. The rotating assembly 13 can rotate on the filter assembly 11 to drive the second blocking part 131 to rotate between the filter 111 and the first blocking part 112, so as to increase or decrease the blocking area of ​​the filter 111.

[0038] In this embodiment, the refrigerant enters through the air inlet 22. The filter device 1 is disposed inside the distributor 2, and the filter support 12 is disposed close to the air inlet 22, so that the filter device 1 can filter the refrigerant entering the distributor 2 to separate the gas-liquid mixture of the refrigerant. The filter device 1 in this embodiment includes a filter assembly 11, a filter support 12, and a rotating assembly 13. The rotating assembly 13 is stacked and mounted together with the filter assembly 11 onto the filter support 12 to achieve a connection between the three components. The connection method can be an interference fit to ensure that it does not detach during use. Since the rotating assembly 13 needs to rotate, the interference fit should be a slight interference fit so that the rotating assembly 13 can be rotated in other ways. By rotating the rotating assembly 13, the second shielding part 131 rotates between the filter 111 and the first shielding part 112, thereby... The filtration area of ​​the filter 111 is adjusted by increasing or decreasing the blocking area of ​​the filter 111. That is, when the blocking area of ​​the filter 111 increases, the filtration area decreases, and when the blocking area of ​​the filter 111 decreases, the filtration area increases. The maximum blocking area is the sum of the areas of the first blocking part 112 and the second blocking part 131. At this time, the entire second blocking part 131 is located on the filter 111. The minimum blocking area is the area of ​​either the first blocking part 112 or the second blocking part 131. At this time, the second blocking part 131 overlaps with the first blocking part 112. During the rotation of the rotating component 13 in this embodiment, the position of the filter screen 111 corresponding to the second blocking part 131 is blocked, and the refrigerant cannot flow into the filter screen 111 from this position. Instead, it can only flow to other positions of the filter screen 111. That is, the second blocking part 131 changes the flow direction of the refrigerant and can increase or decrease the filtration area of ​​the filter screen 111 according to the operating conditions, so that the distributor 2 can be used in different application scenarios and improve the applicability of the distributor 2.

[0039] Specifically, such as Figure 4 As shown, the filter support 12 is an annular support. The filter support 12 is disposed in the inner wall of the liquid dispenser 2. The filter support 12 is provided with an annular mounting groove 121 along the circumference. The filter assembly 11 and the rotating assembly 13 are both installed in the annular mounting groove 121.

[0040] In this embodiment, the 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 distributor 2, making the installation of the filter support 12 more stable. The filter support 12 can be installed in the inner wall of the distributor 2 by welding, threaded connection, or snap-fit ​​fixing, ensuring that it will not shift 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 dimensions 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. In this embodiment, the filter assembly 11 is stably installed in the distributor 2 through the annular mounting groove 121 and is positioned close to the air inlet 22 of the distributor 2, so that the filter assembly 11 can fully receive the refrigerant from the air inlet 22 and filter the refrigerant. Furthermore, the rotating assembly 13 can rotate on the filter assembly 11, changing the filtration area of ​​the filter assembly 11 to adapt to the required refrigerant volume under different operating conditions.

[0041] Specifically, such as Figure 2 and Figure 3 As shown, the filter assembly 11 also includes an annular base 113 and a conical shielding part 114. The annular base 113 is installed in the annular mounting groove 121. The first shielding part 112 and the filter 111 form an annular structure that arches towards the air inlet. The bottom of the annular structure is connected to the annular base 113. The conical shielding part 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 part 112, an annular base 113, and a conical shielding part 114. The filter 111 and the first shielding part 112 form an annular structure. The bottom of the annular structure is adapted to the shape of the annular base 113 and 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 part 114 and connected to the flared end of the conical shielding part 114. The tip of the conical shielding part 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 tapered baffle 114 of the filter assembly 11 forms a low-flow-resistance flow channel with the inner wall of the distributor 2. The tip of the tapered baffle 114 changes the flow direction of the refrigerant flowing into the distributor 2 from the air inlet 22 with minimal local resistance, allowing it to pass evenly through the filter 111 along the formed flow channel. A schematic diagram of the refrigerant flow is provided. Figure 6As shown, this design changes the filter surface from a circular tube to an annular surface, which not only increases the effective filtration area, but also evenly disperses the flow of refrigerant in the air inlet 22 through the flow channel, reducing the impact force of the refrigerant directly acting on the filter screen 111, avoiding the backflow of refrigerant in the upper part of the distributor 2, and reducing the pressure loss and pulsation of the refrigerant.

[0043] Specifically, such as Figures 7-9 As shown, the rotating assembly 13 includes an annular mounting portion 132, which is mounted in an annular mounting groove 121, and a second blocking portion 131 is disposed on the annular mounting portion 132.

[0044] The filter support 12 has a first arc-shaped adjustment groove 122 arranged circumferentially on the outer side, and an adjustment part 133 is arranged on the outer side of the annular mounting part 132. The adjustment part 133 is connected to the first arc-shaped adjustment groove 122 and can slide in the first arc-shaped adjustment groove 122 to drive the annular mounting part 132 to rotate.

[0045] In this embodiment, the rotating assembly 13 includes a second blocking part 131, an annular mounting part 132, and an adjusting part 133. The second blocking part 131 is disposed on the annular mounting part 132. The shape of the annular mounting part 132 is adapted to the shape of the annular mounting groove 121. The annular mounting part 132 is installed into the annular mounting groove 121 to ensure that the rotating assembly 13 can be stably connected to the filter support 12. The adjusting part 133 is disposed on the outside of the annular mounting part 132. The first arc-shaped adjusting groove 122 is disposed on the outside along the circumference of the filter support 12. The adjusting part 133 is connected to the first arc-shaped adjusting groove 122. The adjusting part 133 can slide in the first arc-shaped adjusting groove 122, thereby driving the annular mounting part 132 to rotate, so that the second blocking part 131 rotates between the first blocking part 112 and the filter 111. The second blocking part 131 cooperates with the first blocking part 112 to increase or decrease the blocking area of ​​the filter, thereby adjusting the filtration area of ​​the filter 111. In specific implementation, the arc of the first arc-shaped adjusting groove 122 is preferably set to 90°. Figure 4 (a) so that when the adjusting part 133 rotates, the second blocking part 131 can be completely rotated onto the filter screen 111. Figure 9 a) or superimposed on the first shielding part 112 ( Figure 8(a) In addition, during the assembly 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 allow the second shielding portion 131 to slide with less resistance, the two need to be stacked together before being installed on the annular mounting groove 121. The stacking method can be to stack the second shielding portion 131 on top of 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 in the annular groove 121. The inner ring of the mounting part 132 has a second shielding part 131 set at a height slightly higher than the annular structure formed by the first shielding part 112 and the filter screen 111. A connecting part 134 can be set on the annular mounting part 132, and the second shielding part 131 can be installed on the connecting part 134 to achieve overlapping. After the filter screen assembly 11 and the filter screen support 12 are assembled, the adjusting part 133 is welded to the outer side of the annular mounting part 132 through the first arc-shaped adjusting groove 122. The sliding adjusting part 133 can drive the second shielding part 131 to rotate, thereby adjusting the filtration area of ​​the filter screen 111.

[0046] Specifically, such as Figures 10-11 As shown, the dispenser 2 is provided with a second arc-shaped adjustment groove 23 corresponding to the position of the first arc-shaped adjustment groove 122. The adjustment part 133 passes through the first arc-shaped adjustment groove 122 and the second arc-shaped adjustment groove 23 in sequence and extends to the outside of the dispenser 2.

[0047] In this embodiment, the filter device 1 is installed on the inner wall of the liquid dispenser 2. In order to adjust the filtration area of ​​the filter device 1, it is preferable to set a second arc-shaped adjustment groove 23 at the position corresponding to the first arc-shaped adjustment groove 122 on the liquid dispenser 2, 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 blocking part 131.

[0048] Specifically, such as Figures 10-11 As shown, the filter device 1 also includes an electromagnetic component 14, which includes a first magnetic element 141 and a second magnetic element 142. The first magnetic element 141 is installed at one end of the adjustment section 133. The second magnetic element 142 is disposed on the outside of the liquid dispenser 2 corresponding to the first magnetic element 141 and is connected to an external power source. The second magnetic element 142 is a variable polarity magnetic element. The external power source can supply current in different directions to change the polarity of the second magnetic element 142, so that the magnetic forces between the second magnetic element 142 and the first magnetic element 141 attract or repel each other, thereby driving the adjustment section 133 to rotate along the first arc-shaped adjustment groove 122 and the second arc-shaped adjustment groove 23.

[0049] In the aforementioned embodiments, the rotation of the rotating component 13 can be achieved by independently setting a drive component, which directly drives the rotating component 13 to rotate. However, in this embodiment, the rotation of the rotating component 13 is achieved by an electromagnetic component 14. In specific implementation, the rotating component 13 is installed in the annular mounting groove 121 with an interference fit, and the adjusting part 133 extends outside the distributor 2. When the adjusting part 133 is rotated, a certain external force is required to overcome the contact friction between the rotating component 13 and the annular mounting groove 121. Therefore, the first magnetic element 141 is installed at the end of the adjusting part 133 that extends out, that is, a connecting hole 1411 is provided at the position of the first magnetic element 141 corresponding to the position of the adjusting part 133 (see reference). Figure 12 The connecting hole 1411 is connected to one end of the adjusting part 133. The second magnetic element 142 is positioned on the outside of the liquid separator 2, corresponding to the position of the first magnetic element 141. The second magnetic element 142 is connected to an external power source. When power is applied, a magnetic field is generated between the two magnetic elements, which enables the adjusting part 133 to overcome the contact friction between the rotating assembly 13 and the annular mounting groove 121 and rotate. By changing the direction of the current, the rotation direction of the adjusting part 133 can be controlled, thereby adjusting the filtration area of ​​the filter screen 111.

[0050] In specific implementation, the second magnetic element 142 is a variable-pole magnetic element. The polarity of the second magnetic element 142 can be changed by applying current to it, adjusting the duration and direction of the current. Through the principle of electromagnetic induction, magnetism is generated during the energizing period. The variable-pole magnetic element and the first magnetic element 141 generate an attractive or repulsive magnetic force. When the magnetic force Fc is greater than the frictional force f between the rotating assembly 13 and the filter support 12, the rotating assembly 13 undergoes a rotational displacement about the central axis of the distributor 2 during energization, causing a change in the position of the second shielding part 131 of the rotating assembly 13, thereby adjusting the shielding area of ​​the filter 111. Specifically, when a positive current i is applied, the magnetic force Fc between the two magnetic elements is an attractive force, meaning the polarity of the variable-pole magnetic element is opposite to that of the first magnetic element 141. When a reverse current -i is applied, the magnetic force Fc between the two magnetic elements is a repulsive force, meaning the polarity of the variable-pole magnetic element is the same as that of the first magnetic element 141.

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

[0052] In this embodiment, the filter screen 111 will be subjected to different pressures and undergo different degrees of deformation under different operating conditions. The different deformation magnitudes need to be detected by the pressure sensor 15. Preferably, the pressure sensor 15 is set in the annular mounting groove 121, which can be set at a height away from the annular base 113 and the annular mounting part 132, so that the rotating component 13 cannot squeeze the pressure sensor 15 when it rotates. Then, the filtration area of ​​the filter screen assembly 11 is controlled according to the data detected by the pressure sensor 15.

[0053] In practical implementation, the pressure sensor 15 is used in conjunction with the electromagnetic component 14. The input direction of the current is controlled based on the data detected by the pressure sensor 15, thereby controlling the rotation direction of the regulating unit 133. The specific steps are as follows: 1. Connect the distributor 2 to the test system and run it for time T, as well as under multiple different load conditions m(T), to obtain a series of pressure values ​​P(T) from the pressure sensor under these conditions. Fit these data to obtain the pressure-condition curve P = f(m); 2. By testing different energizing times t (ensuring the energizing current is large enough to allow the regulating unit 133 to rotate), the rotation angle of the rotating component 13 is φ, obtaining the t = g(φ) curve; 3. Define the function φ = h(m) based on the desired filtration area under each condition; 4. Define I(ΔP, ΔT) based on the specified monitoring time interval ΔT and the expected change in ΔP (i.e., determining a change in condition m), where I ∈ (-i, i); Integrate the above four functions to obtain t = (g(h(arc The model is completed by using the curves f(P) and I(ΔP, ΔT), where the first input controls the energizing time and the second input controls whether energizing is required and the direction of energizing.

[0054] Under the current operating conditions, when the flow rate of the refrigerant decreases from large to small, the first magnetic component 141 is attracted to overcome friction and slide, driving the adjustment part 133 of the rotating assembly 13, so that the second blocking part 131 partially overlaps with the filter screen 111, increasing the filtration area and improving the oil separation efficiency. When the flow rate of the refrigerant increases from small to large, the first magnetic component 141 is repelled to overcome friction and slide, driving the adjustment part 133 of the rotating assembly 13, so that the second blocking part 131 gradually blocks the filter screen 111, thereby reducing the filtration area, increasing the refrigerant flow rate, and reducing pressure loss and pulsation.

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

[0056] In this embodiment, since the refrigerant contains some lubricating oil, in order to filter this lubricating oil, it is preferable to use an oil-repellent material to make the filter screen 111, so that the lubricating oil in the refrigerant cannot pass through the filter screen 111 and enter other positions of the distributor 2, thereby achieving a high-efficiency filtration effect.

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

[0058] In this embodiment, the filter 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. The specific modification steps are as follows: 1. The stainless steel filter screen is ultrasonically cleaned sequentially with petroleum ether, anhydrous ethanol and deionized water for a period of time (the treatment time can be 10 min), and then dried with high-pressure nitrogen gas to ensure that the surface of the stainless steel filter screen to be treated is free of impurities; 2. The ultrasonically cleaned stainless steel filter screen 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 it is placed in trichloroisocyanuric acid solution. The stainless steel filter screen is etched in a ferrometallurgical solution for a period of time (etching time can be 2 hours) and then calcined in a muffle furnace for a period of time (calcination time can be 2 hours) to generate a metal oxide film (i.e., micro-nano composite structure) on the surface of the filter screen; 4. It is placed in a polytetrafluoroethylene box containing a predetermined amount (can be 20 microliters) of heptadecafluorodecyltrimethoxysilane and kept at a predetermined temperature (can be 150℃) for a period of time (keeping time can be 3 hours), and then undergoes a dehydration condensation reaction to generate Si-OH groups. Finally, a layer of heptadecafluorodecyltrimethoxysilane molecular film is bonded to its surface, which can achieve oleophobic function.

[0059] like Figure 2 and Figure 11 As shown, this embodiment of the invention also provides a liquid dispenser 2, including a liquid dispenser body 21 and a filter device 1 as described above disposed within the liquid dispenser body 21.

[0060] In this embodiment, by placing the filter device 1 inside the liquid separator body 21, the filtration area can be adjusted according to the operating conditions.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A screen device for use in a distributor, characterized by The filter screen device comprises a filter screen assembly, a filter screen support and a rotating assembly, the filter screen support is arranged close to an air inlet of the distributor, the filter screen assembly and the rotating assembly are both mounted on the filter screen support, the filter screen assembly comprises a filter screen and a first shielding part connected with the filter screen, the rotating assembly is provided with a second shielding part, the rotating assembly can rotate on the filter screen assembly to drive the second shielding part to rotate between the filter screen and the first shielding part, so as to increase or decrease the shielding area of the filter screen; wherein the rotating assembly is combined with the filter screen assembly and mounted on the filter screen support to realize interference fit.

2. The screen device of claim 1, wherein, The filter screen support is a ring-shaped support, the filter screen support is arranged in an inner wall of the distributor, the filter screen support is provided with a ring-shaped mounting groove in the circumferential direction, and the filter screen assembly and the rotating assembly are both mounted in the ring-shaped mounting groove.

3. The screen device of claim 2, wherein, The filter screen assembly further comprises a ring-shaped base and a conical shielding part, the ring-shaped base is mounted in the ring-shaped mounting groove, the first shielding part and the filter screen enclose a ring-shaped structure which is arched towards the air inlet, the bottom of the ring-shaped structure is connected to the ring-shaped base, and the conical shielding part has a pointed end and a flared end, the pointed end is directed towards the air inlet, and the flared end is connected to the top of the ring-shaped structure.

4. The screen device of claim 3, wherein, The rotating assembly comprises a ring-shaped mounting part, the ring-shaped mounting part is mounted in the ring-shaped mounting groove, and the second shielding part is arranged on the ring-shaped mounting part. The outer side of the filter screen support is provided with a first arc-shaped adjusting groove in the circumferential direction, the outer side of the ring-shaped mounting part is provided with an adjusting part, the adjusting part is connected to the first arc-shaped adjusting groove and can slide in the first arc-shaped adjusting groove to drive the ring-shaped mounting part to rotate.

5. The screen device of claim 4, wherein, The distributor is provided with a second arc-shaped adjusting groove corresponding to the position of the first arc-shaped adjusting groove, and the adjusting part sequentially passes through the first arc-shaped adjusting groove and the second arc-shaped adjusting groove and extends to the outside of the distributor.

6. The screen device of claim 5, wherein, The filter screen device further comprises an electromagnetic assembly, the electromagnetic assembly comprises a first magnetic part and a second magnetic part, the first magnetic part is mounted at one end of the adjusting part, the second magnetic part is arranged on the outside of the distributor corresponding to the first magnetic part and is connected with an external power supply, the second magnetic part is a variable polarity magnetic part, the external power supply can pass current in different directions to change the polarity of the second magnetic part, so that the magnetic field force between the second magnetic part and the first magnetic part is attracted or repelled, to drive the adjusting part to rotate along the first arc-shaped adjusting groove and the second arc-shaped adjusting groove.

7. The screen apparatus of claim 1, wherein, The filter screen device further comprises a pressure sensor arranged on the filter screen support, and the pressure sensor is used to detect the pressure of the filter screen assembly.

8. The screen apparatus of claim 1, wherein, The filter screen is made of oleophobic material.

9. The screen device of claim 8, wherein, The surface of the filter screen has a micro-nano composite structure and is modified by heptadecafluorodecyltrimethoxysilane.

10. A liquid separator, characterized by The filter screen device comprises a distributor body and a filter screen device arranged in the distributor body, as claimed in any one of claims 1-9.

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