A drying filter for a refrigerator refrigeration cycle system

Abstract

The present invention relates to the field of drying filters, and specifically to a drying filter for a refrigerator refrigeration cycle system, which includes a copper tube shell. One end inside the copper tube shell is fixedly provided with a filter screen cover for filtering impurities in the refrigerant. The filter screen cover is in the shape of a frustum of a cone. One end of the filter screen cover is communicatively and fixedly connected with a three-way pipe, and both ends of the three-way pipe are communicatively and fixedly connected with a first elbow pipe. One end of the first elbow pipe is detachably communicatively and fixedly connected with a connecting pipe, and a clogging prompt mechanism is arranged inside the connecting pipe. In the present invention, by setting the traditional circular block-shaped filter screen fixed at one end of the copper tube shell into a hopper-shaped filter screen cover, it not only meets the requirement of filtering impurities in the refrigerant, but also can, by means of the filtering guiding function of the filter screen cover, make the impurities at different positions on the filter screen cover converge to the middle of the filter screen cover, and then be transported to the first elbow pipe and the connecting pipe through the three-way pipe, effectively preventing the problem of filter screen clogging.

Description

Technical Field

[0001] The present invention relates to the field of drying filters, and more particularly to a drying filter for a refrigerator refrigeration cycle system. Background Art

[0002] The drying filter in a refrigerator refrigeration cycle system is one of the important auxiliary components of the refrigeration system. It is mainly used to remove residual moisture in the refrigeration system and filter impurities to maintain the normal operation of the refrigeration system. One of the common faults of the drying filter is "dirty blockage", which may be caused by various reasons such as moisture in the refrigeration system, too dirty refrigeration oil, poor welding, oxidation scale falling off on the inner wall of the pipe, and mechanical wear impurities generated by the compressor running for many years.

[0003] In order to prevent the occurrence of "dirty blockage", filter drying structures such as filter screens, molecular sieves, and activated carbon are generally installed inside the copper pipe shell of the drying filter. When too many impurities are filtered on the filter screen, the filter screen is not conducive to the smooth passage of the refrigerant through the filter screen, and the flow of the refrigerant in the system will be blocked, thus affecting the refrigeration effect. At present, most drying filters are not conducive to prompting users of the "dirty blockage" phenomenon of the filter screen, and the drying filter cannot continue to allow the refrigerant to filter and flow when the user cleans the impurities on the filter screen of the drying filter. Summary of the Invention

[0004] The purpose of the present invention is to provide a drying filter for a refrigerator refrigeration cycle system. By setting the circular block-shaped filter screen traditionally fixed at one end of the copper pipe shell into a hopper-shaped filter screen cover, it not only meets the requirement of filtering impurities in the refrigerant, but also can make the impurities at different positions on the filter screen cover converge to the middle of the filter screen cover by means of the filtering and guiding action of the filter screen cover, and then be transported to the first elbow pipe and the connecting pipe through a tee pipe, effectively preventing the problem of filter screen dirty blockage, so as to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A drying filter for a refrigerator refrigeration cycle system, comprising:

[0007] A copper pipe shell;

[0008] A filter screen cover, fixed at one end inside the copper pipe shell, for filtering impurities in the refrigerant. The filter screen cover is in the shape of a frustum of a cone, and one end of the filter screen cover is fixedly connected to a tee pipe;

[0009] Two first elbow pipes, respectively fixedly connected to the two ends of the tee pipe;

[0010] Two connecting pipes, one end of each being detachably and fixedly connected to the corresponding first elbow pipe, and a dirty blockage prompting mechanism is arranged inside the connecting pipe;

[0011] The dirt blockage prompt mechanism includes a connecting shaft and a rack. A first filter cylinder is fixedly sleeved outside the connecting shaft. The top end of the connecting shaft is in meshing transmission with the rack, and a detection box is fixed to the bottom end of the connecting shaft.

[0012] There are two second elbows. One end of each second elbow is detachably and fixedly communicated with a corresponding connecting pipe, and a second filter cylinder is arranged inside the other end of each second elbow.

[0013] There are two return pipes. The top ends of the return pipes are fixedly communicated with the bottom ends of the corresponding second elbows.

[0014] The drying mechanism is arranged inside one end of the copper tube shell and is used for removing water vapor, adsorbing peculiar smell, and protecting the refrigeration system.

[0015] Furthermore: One end of the copper tube shell is respectively fixedly communicated with a first joint pipe and a second joint pipe, and activated carbon is filled inside the copper tube shell.

[0016] Furthermore: A fixed flange detachably fixed to the connecting pipe is fixed to the top of the first elbow, and a first solenoid valve is serially installed at the bottom end of the first elbow.

[0017] Furthermore: A filling pipe is fixedly communicated with the outside of the connecting pipe, and a valve is installed inside the filling pipe.

[0018] Furthermore: Activated carbon particles are placed inside the first filter cylinder. A plurality of notches are equiangularly arranged in a ring shape on the outside of the first filter cylinder, and a gear in meshing transmission with the rack is fixed to the top of the connecting shaft.

[0019] Furthermore: The bottom end of the connecting shaft rotates a detection box slidably connected to the inside of the connecting pipe, and a displacement sensor is fixedly installed inside the detection box.

[0020] Furthermore: Internal threads for screwing with the second filter cylinder are provided inside the second elbow. The second filter cylinder extends into the corresponding return pipe, and a gap is reserved between the outside of the second filter cylinder and the inside of the return pipe.

[0021] Furthermore: A first connecting flange is fixed to the outside of the bottom of the second elbow, and a second connecting flange is fixedly connected to the top of the return pipe. The first connecting flange and the second connecting flange are detachably and fixedly connected by bolts.

[0022] Furthermore: The drying mechanism includes:

[0023] A net plate fixedly connected to the inner side of the copper tube shell;

[0024] A plurality of net bags with molecular sieves contained inside;

[0025] A plugging cover screwed to the copper tube shell.

[0026] Furthermore, the multiple mesh bags are arranged between the mesh plate and the plugging cover. A mesh hole is formed in the middle of the plugging cover, and a toggle rod is fixed in the middle of the plugging cover.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. By fixing a filter screen cover with a frustum shape at one end inside the copper tube shell, during the process of the refrigerant passing through the filter screen cover, the filter screen cover can filter impurities in the refrigerant. Due to the shape characteristics of the filter screen cover, the impurities filtered on the inner side thereof flow towards the middle of the filter screen cover along with the refrigerant, and then flow away along with the tee pipe and the elbow pipe, preventing a large area of impurities from blocking the filter screen cover and affecting the smooth flow of the refrigerant on the filter screen cover.

[0029] 2. By arranging a first filter screen cylinder in the middle of the connecting pipe, and a plurality of notches are arranged at equal angles in a ring shape on the outer side of the first filter screen cylinder. The refrigerant transported from the middle of the filter screen cover to the inside of the connecting pipe through the first elbow pipe will carry impurities to the notches on the outer side of the first filter screen cylinder. The refrigerant passes through the first filter screen cylinder, and the impurities are intercepted at the notches. As the impurities filtered on the outer side of the first filter screen cylinder gradually increase, the first filter screen cylinder is gradually blocked. After being blocked, the first filter screen cylinder is pushed towards the second elbow pipe under the thrust of the refrigerant flow. During the process of the first filter screen cylinder moving along the connecting pipe towards the second elbow pipe, the connecting shaft drives the detection box to move, and the reading of the displacement sensor inside the detection box changes. The user can judge that there are more impurities filtered on the first filter screen cylinder according to the change in the reading of the displacement sensor, which is convenient for prompting the user to clean the impurities in the refrigerant.

[0030] 3. By fixing a gear at the top of the connecting shaft, during the process of the first filter screen cylinder driving the connecting shaft to move towards the second elbow pipe, the gear on the connecting shaft meshes and rolls on the rack, thereby driving the connecting shaft to drive the first filter screen cylinder to rotate, so that the impurities intercepted on the outer side of the first filter screen cylinder are transferred to the direction that caters to the refrigerant flow, and thus the impurities can be transported into the second filter screen cylinder inside the second elbow pipe for caching by means of the refrigerant flow.

[0031] 4. By arranging two groups of filtering mechanisms on the outer side of the copper tube shell, each group of filtering structures includes a first elbow pipe, a connecting pipe, a second elbow pipe and a return pipe. When there are impurities intercepted by the second filter screen cylinder inside the second elbow pipe of a group of filtering mechanisms, the solenoid valve I on the first elbow pipe and the solenoid valve II on the return pipe of this group of filtering mechanisms can be closed, and then the second elbow pipe can be detached from the return pipe and the connecting pipe, which is convenient for taking out the impurities inside the second filter screen cylinder;

[0032] Before cleaning a set of filtering mechanisms, the solenoid valve I on the elbow pipe I of another set of filtering mechanisms and the solenoid valve II on the return pipe can be opened, so that the impurities intercepted in the refrigerant are filtered into the filter screen cylinder II of the other set, realizing that during the process of cleaning the refrigerant impurities, the refrigerant inside the copper tube shell can continue to flow through the dryer, achieving that the refrigerant can be filtered and flow simultaneously during the process of cleaning the impurities in the dryer. Brief Description of the Drawings

[0033] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 is a schematic diagram of the internal structure of the copper tube shell in the present invention;

[0035] Figure 3 is a schematic diagram of the filter screen and elbow pipe I structure in the present invention;

[0036] Figure 4 is a schematic diagram of the elbow pipe I, connecting pipe, elbow pipe II, and return pipe structure in the present invention;

[0037] Figure 5 is a schematic diagram of the internal structure of the connecting pipe in the present invention;

[0038] Figure 6 is a schematic diagram of the internal structure of the filter screen cylinder I in the present invention;

[0039] Figure 7 is a schematic diagram of the elbow pipe II, return pipe, and filter screen cylinder II structure in the present invention;

[0040] Figure 8 is a schematic diagram of the drying mechanism structure in the present invention.

[0041] In the figure: 100, copper tube shell; 110, joint pipe I; 120, joint pipe II; 130, activated carbon particles; 200, filter screen cover; 210, three-way pipe; 300, elbow pipe I; 310, fixed flange; 320, solenoid valve I; 400, connecting pipe; 410, filling pipe; 500, dirt blockage prompt mechanism; 510, connecting shaft; 511, gear; 520, filter screen cylinder I; 521, notch; 530, rack; 540, detection box; 600, elbow pipe II; 610, filter screen cylinder II; 620, connecting flange I; 700, return pipe; 710, connecting flange II; 720, solenoid valve II; 800, drying mechanism; 810, mesh plate; 820, mesh bag; 830, sealing cover. Detailed Embodiments

[0042] 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 only 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.

[0043] For example, see Figure 1-8 In an embodiment of the present invention, a drying filter of a refrigerator refrigeration cycle system includes a copper tube shell 100, a filter cover 200 is fixed at one end inside the copper tube shell 100, and the filter cover 200 is used to filter impurities in the refrigerant. The filter cover 200 has a truncated cone shape, and one end of the filter cover 200 is connected and fixed with a three-way pipe 210, and both ends of the three-way pipe 210 are connected and fixed with an elbow 300, and one end of the elbow 300 is detachably connected and fixed with a connecting pipe 400, and a dirty blockage prompting mechanism 500 is arranged inside the connecting pipe 400, and the dirty blockage prompting mechanism 500 includes a connecting shaft 510 and a rack 530, and the connecting shaft 5 A filter cylinder 520 is fixedly sleeved on the outer side of 10, the top of the connecting shaft 510 is meshed with the rack 530 for transmission, the bottom of the connecting shaft 510 is fixed with a detection box 540, the end of the connecting pipe 400 away from the bend pipe 300 is connected and fixed with a bend pipe 600, one end of the bend pipe 600 is detachably connected and fixed with the connecting pipe 400 at the corresponding position, the other end of the bend pipe 600 is internally provided with a filter cylinder 610, the bottom end of the bend pipe 600 is connected and fixed with a return pipe 700, and a drying mechanism 800 is internally provided at one end of the copper tube shell 100, and the drying mechanism 800 is used to remove water vapor, absorb odor and protect the refrigeration system.

[0044] Specifically, by setting the circular block filter that is traditionally fixed at one end of the copper tube shell 100 into a hopper-shaped filter cover 200, not only can the impurities in the refrigerant be filtered, but the impurities at different positions on the filter cover 200 can also be gathered in the middle of the filter cover 200 with the help of the filtering and guiding effect of the filter cover 200, and then transported to the elbow 300 and the connecting pipe 400 through the three-way pipe 210, effectively preventing the problem of dirty filter blockage, and the impurities transported to the connecting pipe 400 by the refrigerant are intercepted by the filter cylinder 520, and the filter cylinder 520 intercepted with a large amount of impurities moves toward the direction of the elbow 600 with the flow of the refrigerant. During the movement, the pressure sensor at the bottom of the filter cylinder 520 is displaced, and the change in the indication of the pressure sensor prompts the user that the impurities need to be cleaned, which is convenient for the user to clean the impurities filtered in the refrigerant in time.

[0045] like Figure 2As shown, in this embodiment, a first connection pipe 110 and a second connection pipe 120 are respectively and fixedly connected and communicated at both ends of the copper tube shell 100. Activated carbon 130 is filled inside the copper tube shell 100. Both the first connection pipe 110 and the second connection pipe 120 are structures of the prior art and are used to be connected to the pipes of the refrigeration cycle system. The activated carbon 130 further improves the filtering effect and can adsorb odors.

[0046] As Figure 2-4 shown, in this embodiment, a fixed flange 310 detachably fixed to the connecting pipe 400 is fixed at the top of the first elbow pipe 300, and a first solenoid valve 320 is installed in series at the bottom end of the first elbow pipe 300.

[0047] In this embodiment, the first elbow pipe 300 and the connecting pipe 400 are detachably installed and fixed together. The first solenoid valve 320 is closed when impurities inside the second elbow pipe 600 need to be cleaned to prevent the refrigerant from flowing to the outside through the first elbow pipe 300.

[0048] As Figure 4 shown, in this embodiment, a filling pipe 410 is fixedly connected and communicated on the outside of the connecting pipe 400, and a valve is installed inside the filling pipe 410.

[0049] In this embodiment, during the process of cleaning the impurities inside the filter screen cylinder two 610 on the second elbow pipe 600, it is necessary to close the first solenoid valve 320 on the first elbow pipe 300 and the second solenoid valve 720 on the return pipe 700, and then remove the second elbow pipe 600. This will cause the refrigerant remaining inside the second elbow pipe 600 to flow away. Subsequently, after cleaning the impurities inside the filter screen cylinder two 610, when the second elbow pipe 600 is reinstalled between the return pipe 700 and the connecting pipe 400, the lost refrigerant can be injected into the connecting pipe 400 through the filling pipe 410 for standby, so that when the refrigerant flows through the first elbow pipe 300, the connecting pipe 400 and the second elbow pipe 600 again to filter impurities, it can be supplemented into the refrigeration system.

[0050] As Figure 5 shown, in this embodiment, activated carbon particles are placed inside the filter screen cylinder one 520. A plurality of notches 521 are formed at equal angles in a circular shape on the outside of the filter screen cylinder one 520. A gear 511 meshing and driving with a rack 530 is fixed at the top of the connecting shaft 510.

[0051] In this embodiment, when the refrigerant passes through the filter screen cylinder one 520, it will pass through the activated carbon particles, improving the purification effect of the refrigerant. The plurality of notches 521 are convenient for intercepting the impurities transported from the first elbow pipe 300. Under the thrust of the flowing refrigerant, the clogged filter screen cylinder one 520 will move along the rack 530, and the gear 511 will rotate meshingly on the rack 530, so that the side of the filter screen cylinder one 520 intercepting impurities is transferred to face the direction of the flowing refrigerant, facilitating the cleaning of the filter screen cylinder one 520 by means of the flowing force of the refrigerant.

[0052] like Figure 5 As shown, in this embodiment, rectangular receiving grooves are opened at the upper and lower positions inside the connecting tube 400, and the two receiving grooves are used to store the rack 530 and the detection box 540 respectively. The rectangular receiving grooves are opened towards the inside of the connecting tube 400 with sliding grooves to facilitate the movement of the connecting shaft 510.

[0053] like Figure 5 As shown, in this embodiment, a detection box 540 rotatably connected to the inside of the connecting tube 400 is rotatably disposed at the bottom end of the connecting shaft 510 , and a displacement sensor is fixedly installed inside the detection box 540 .

[0054] In this embodiment, the filter cylinder 520 intercepting impurities will move along the connecting tube 400, thereby causing the connecting shaft 510 to move with the detection box 540. The movement of the detection box 540 will cause the displacement sensor value to change, and based on the changed value, it can be judged that the connecting tube 400 contains more impurities.

[0055] like Figure 7 As shown, in this embodiment, the interior of the second elbow 600 is provided with an internal thread that is screwed together with the second filter cylinder 610. The second filter cylinder 610 extends to the inside of the return pipe 700 at a corresponding position, and a gap is reserved between the outside of the second filter cylinder 610 and the inside of the return pipe 700.

[0056] The second filter cylinder 610 is screwed together with the second elbow 600 to facilitate disassembly of the second filter cylinder 610 to clean the impurities inside it. The gap allows the refrigerant flowing to the position of the second filter cylinder 610 to be re-injected into the connecting pipe 400 through the return pipe 700.

[0057] like Figure 4 As shown, in this embodiment, a connecting flange 1 620 is fixed to the outer side of the bottom of the second bend pipe 600, and a connecting flange 2 710 is fixedly connected to the top of the return pipe 700. The connecting flange 1 620 and the connecting flange 2 710 are detachably fixedly connected by bolts, so that the second bend pipe 600 fixed on the return pipe 700 can be removed.

[0058] Embodiment 2, based on embodiment 1, in order to change the position of the molecular sieve, the molecular sieve at the saturated position is replaced.

[0059] like Figure 8 As shown, in this embodiment, the drying mechanism 800 includes a mesh plate 810 fixedly connected to the inner side of the copper tube shell 100 and a sealing cover 830 screwed together with the copper tube shell 100, a plurality of mesh bags 820 are arranged between the sealing cover 830 and the mesh plate 810, the mesh bags 820 contain molecular sieves, and the plurality of mesh bags 820 are arranged between the mesh plate 810 and the sealing cover 830, a mesh hole is opened in the middle of the sealing cover 830, and a toggle rod is fixed in the middle of the sealing cover 830.

[0060] In this embodiment, by designing a complete molecular sieve into multiple individual molecular sieves contained in a mesh bag 820, it is convenient to replace the part with reduced use effect individually. This can not only avoid material waste caused by overall replacement, but also prevent the molecular sieves with saturated use effect on the molecular sieve from affecting the subsequent drying and filtering effect. During the process of replacing the molecular sieve, the second connecting pipe 120 can be disassembled, and then the plugging cover 830 can be unscrewed and removed. Then, the mesh bags 820 containing molecular sieves at different positions can be replaced and used, so that the unsaturated molecular sieve mesh bags 820 replace the saturated molecular sieve mesh bags 820, or new mesh bags 820 filled with molecular sieves can be replaced. Then, rotate the plugging cover 830 to install the multiple mesh bags 820 filled with molecular sieves between the plugging cover 830 and the mesh plate 810 for standby.

[0061] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0062] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drying filter of a refrigerator refrigeration cycle system, characterized in that: include: Copper tube shell (100); A filter cover (200) is fixed at one end inside the copper tube shell (100) and is used to filter impurities in the refrigerant. The filter cover (200) has a truncated cone shape, and one end of the filter cover (200) is connected and fixed with a three-way pipe (210); Elbow pipes 1 (300), two in number, are respectively connected and fixed to both ends of the tee pipe (210); There are two connecting pipes (400), one end of which is detachably connected and fixed to the corresponding bent pipe 1 (300), and a dirt blockage prompt mechanism (500) is arranged inside the connecting pipe (400); The dirty blockage prompt mechanism (500) comprises a connecting shaft (510) and a rack (530); a filter screen cartridge (520) is sleeved and fixed on the outer side of the connecting shaft (510); the top end of the connecting shaft (510) is meshed and driven with the rack (530); a detection box (540) is rotatably connected to the inside of the connecting pipe (400) at the bottom end of the connecting shaft (510); a displacement sensor is fixedly installed inside the detection box (540); The number of bent pipes 2 (600) is two, one end of which is detachably connected and fixed to the corresponding connecting pipe (400), and the other end of the bent pipe 2 (600) is provided with a filter screen cylinder 2 (610); There are two return pipes (700), the top of which is connected and fixed to the bottom of the corresponding bent pipe 2 (600); The drying mechanism (800) is arranged inside one end of the copper tube shell (100) and is used to remove water vapor, absorb odor, and protect the refrigeration system.

2. The filter drier of the refrigerator refrigeration cycle system according to claim 1, characterized in that: The two ends of the copper tube shell (100) are respectively connected and fixed with a joint tube 1 (110) and a joint tube 2 (120), and the interior of the copper tube shell (100) is filled with activated carbon (130).

3. The filter drier of the refrigerator refrigeration cycle system according to claim 1, characterized in that: A fixing flange (310) which is detachably fixed to the connecting pipe (400) is fixed to the top of the curved pipe (300), and a solenoid valve (320) is installed in series at the bottom end of the curved pipe (300).

4. The filter drier of the refrigerator refrigeration cycle system according to claim 1, characterized in that: The outer side of the connecting pipe (400) is connected and fixedly connected to a filling pipe (410), and a valve is installed inside the filling pipe (410).

5. The filter drier of the refrigerator refrigeration cycle system according to claim 1, characterized in that: Activated carbon particles are placed inside the filter cartridge 1 (520), and a plurality of notches (521) are provided at equal angles in a circular shape on the outside of the filter cartridge 1 (520). A gear (511) meshing with the rack (530) is fixed at the top of the connecting shaft (510).

6. The filter drier of the refrigerator refrigeration cycle system according to claim 1, characterized in that: The interior of the second curved pipe (600) is provided with an internal thread that is screwed together with the second filter cylinder (610). The second filter cylinder (610) extends into the interior of the return pipe (700) at a corresponding position, and a gap is reserved between the outside of the second filter cylinder (610) and the interior of the return pipe (700).

7. The filter drier of the refrigerator refrigeration cycle system according to claim 1, characterized in that: A connecting flange 1 (620) is fixed to the outer side of the bottom of the second curved pipe (600), and a connecting flange 2 (710) is fixedly connected to the top of the return pipe (700). The connecting flange 1 (620) and the connecting flange 2 (710) are detachably fixedly connected by bolts.

8. The filter drier of the refrigerator refrigeration cycle system according to claim 1, characterized in that: The drying mechanism (800) comprises: A mesh plate (810) is fixedly connected to the inner side of the copper tube shell (100); A plurality of mesh bags (820), wherein the mesh bags (820) contain molecular sieves; The blocking cover (830) is screwed and connected to the copper tube shell (100).

9. The filter drier of the refrigerator refrigeration cycle system according to claim 8, characterized in that: A plurality of mesh bags (820) are arranged between the mesh plate (810) and the blocking cover (830); a mesh hole is provided in the middle of the blocking cover (830); and a toggle rod is fixed in the middle of the blocking cover (830).

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