Low-pressure-difference filter of refrigerating system

Abstract

The utility model provides a refrigerating system low pressure difference filter which comprises a barrel body, an outlet connector is fixed at one end of the barrel body, a detachable bottom cover is arranged at the other end of the barrel body, an inlet connector is arranged on the side wall of the barrel body, a filter element assembly is arranged in the barrel body, and the filter element assembly comprises an outlet end cover and a sealing end cover. A spring is arranged between the closed end cover and the bottom cover, an outer filter cylinder and an inner filter cylinder which are detachable are arranged between the outlet end cover and the closed end cover, the inner filter cylinder is located on the inner side of the outer filter cylinder, the interval between the inner filter cylinder and the outer filter cylinder is an outlet channel, an elastic support is arranged between the inner filter cylinder and the outlet end cover, and the elastic support is connected with the elastic support. An inlet hole is formed in the middle of the closed end cover, the inlet hole is communicated with the inner side of the inner filter cartridge, and a one-way check valve is arranged in the inlet hole. The double-channel filtering of the inner filter cylinder and the outer filter cylinder shares the same outlet channel, so that the space in the barrel body can be fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a low pressure difference filter for a refrigeration system. Background Art

[0002] In addition to increasing the filtration area through folded filter cartridges, existing large flow and low pressure difference filters also use dual-channel filter components, that is, there are two filter cartridges, which can filter the medium independently. If the two filter cartridges are coaxially arranged, the two filter cartridges each have a medium outlet channel, and the two filter cartridges need to be separated by a partition to prevent the filtered medium and the unfiltered medium from mixing and directly discharged. The above structure takes up a lot of space and is not conducive to the full utilization of the space in the shell. In addition, the existing dual-channel filter components are mostly integral structures. When they need to be replaced, they are mostly replaced as a whole, which is costly. Utility Model Content

[0003] The utility model provides a low pressure difference filter for a refrigeration system. The double-channel filtering of an inner filter cartridge and an outer filter cartridge shares the same outlet channel, which is convenient for fully utilizing the space inside the barrel.

[0004] The technical solution of the utility model is implemented as follows: a low-pressure difference filter for a refrigeration system comprises a barrel body, an outlet joint is fixed at one end of the barrel body, a detachable bottom cover is arranged at the other end, an inlet joint is arranged on the side wall of the barrel body, a filter element assembly is arranged in the barrel body, the filter element assembly comprises an outlet end cover and a closed end cover, the outlet end cover is sealingly sleeved on the outlet joint, a spring is arranged between the closed end cover and the bottom cover, a detachable outer filter cartridge and an inner filter cartridge are arranged between the outlet end cover and the closed end cover, the inner filter cartridge is located on the inner side of the outer filter cartridge, the interval between the inner filter cartridge and the outer filter cartridge is an outlet channel, an elastic bracket is arranged between the inner filter cartridge and the outlet end cover, an inlet hole is arranged in the middle of the closed end cover, the inlet hole is communicated with the inner side of the inner filter cartridge, and a one-way check valve is arranged in the inlet hole.

[0005] Furthermore, the elastic support includes an inner end cover, which is connected to the outlet end cover through an elastic metal sheet, and the inner filter cartridge is placed between the inner end cover and the closed end cover. The inner filter cartridge is conveniently fixed by the cooperation of the elastic metal sheet and the spring.

[0006] Furthermore, an inner frame is provided between the outlet end cover and the closed end cover, one end of the inner frame is fixedly connected to the outlet end cover, and the other end is a free end, which abuts against the closed end cover, and the outer filter cartridge is sleeved on the outer side of the inner frame. The inner frame is used to support the outlet end cover and the closed end cover to ensure the strength of the entire filter element assembly, and it is also convenient to install and remove the outlet end cover through the inner frame.

[0007] Furthermore, both the inner end cap and the closed end cap are provided with an inner sealing groove, a first sealing gasket is provided in the inner sealing groove, and the end of the inner filter cartridge is placed in the inner sealing groove. The inner sealing groove and the first sealing gasket ensure the sealing of the end of the inner filter cartridge.

[0008] Furthermore, both the outlet end cover and the closed end cover are provided with an outer sealing groove, a second sealing gasket is provided in the outer sealing groove, the end of the outer filter cartridge is placed in the corresponding outer sealing groove, and the free end of the inner frame is placed in the outer sealing groove of the closed end cover. The sealing performance of the end of the outer filter cartridge is ensured by the cooperation of the outer sealing groove and the second sealing gasket.

[0009] Furthermore, the inner port of the inlet joint is placed in the barrel, and a baffle is fixed to the inner port, and a diversion hole is arranged between the inner port and the baffle. The arrangement of the baffle can prevent the medium from directly impacting the filter element assembly.

[0010] Furthermore, a first sealing ring is arranged between the outlet end cover and the outlet joint. The first sealing ring ensures the sealing performance between the outlet end cover and the outlet joint.

[0011] Furthermore, the barrel body and the bottom cover are connected by bolts, and a second sealing ring is arranged between the barrel body and the bottom cover. The second sealing ring ensures the sealing between the barrel body and the bottom cover.

[0012] Beneficial effects of the utility model:

[0013] The double-channel filtration of the inner filter cartridge and the outer filter cartridge of the utility model shares the same outlet channel, eliminating the partition plate, simplifying the structure, and making full use of the space in the barrel body; at the same time, the cooperation of the inner filter cartridge and the outer filter cartridge is conducive to increasing the filtration area, which is convenient for large flow and low pressure difference filtration.

[0014] The utility model uses a spring to squeeze the outlet end cover and the closed end cover to fix the outer filter cartridge; and uses the cooperation of the elastic bracket, the closed end cover and the spring to fix the inner filter cartridge. When the filter element assembly needs to be disassembled later, it only needs to remove the bottom cover, the squeezing force of the spring is reduced, and the closed end cover is removed, and the outer filter cartridge and the inner filter cartridge can be disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Barrel body 1, outlet joint 2, bottom cover 3, second sealing ring 4, inlet joint 5, baffle 6, outlet end cover 7, closed end cover 8, first sealing ring 9, inner skeleton 10, outer filter cartridge 11, outer sealing groove 12, inner filter cartridge 13, one-way check valve 14, outlet channel 15, inner end cover 16, elastic metal sheet 17, inner sealing groove 18, spring 19. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 As shown, a low pressure difference filter for a refrigeration system includes a barrel body 1, one end of the barrel body 1 is welded and fixed with an outlet joint 2, and the other end is fixed with a bottom cover 3 by bolts, a second sealing ring 4 is installed between the barrel body 1 and the bottom cover 3, the bottom cover 3 is detachable, and the second sealing ring 4 is used to ensure the sealing of the joint between the barrel body 1 and the bottom cover 3.

[0020] An inlet joint 5 is welded and fixed on the side wall of the barrel body 1, the inner port of the inlet joint 5 is placed in the barrel body 1, and a baffle 6 is fixed to the inner port, and a diversion hole is arranged between the inner port and the baffle 6. A filter element assembly is arranged in the barrel body 1, and the filter element assembly includes an outlet end cover 7 and a closed end cover 8. The outlet end cover 7 is sleeved on the outlet joint 2, and a first sealing ring 9 is arranged between the outlet end cover 7 and the outlet joint 2. The arrangement of the first sealing ring 9 ensures the sealing of the outlet.

[0021] An inner skeleton 10 is arranged between the outlet end cover 7 and the closed end cover 8, one end of the inner skeleton 10 is fixedly connected to the outlet end cover 7, and the other end is a free end, which abuts against the closed end cover 8. An outer filter cartridge 11 is sleeved on the outer side of the inner skeleton 10, and an outer sealing groove 12 is arranged on the outlet end cover 7 and the closed end cover 8. A second sealing gasket is fixed in the outer sealing groove 12, the end of the outer filter cartridge 11 is placed in the corresponding outer sealing groove 12, and the free end of the inner skeleton 10 is placed in the outer sealing groove 12 of the closed end cover 8.

[0022] An inner filter cartridge 13 is arranged at intervals inside the inner frame 10, and an inlet hole is arranged in the middle of the closed end cover 8, which is communicated with the inner side of the inner filter cartridge 13. A one-way check valve 14 is fixed inside the inlet hole, and the medium in the barrel body 1 enters the inner filter cartridge 13 through the one-way check valve 14, and the medium in the inner filter cartridge 13 cannot enter the barrel body 1 in the reverse direction. The interval between the inner filter cartridge 13 and the outer filter cartridge 11 is an outlet channel 15. The outlet end cover 7, the closed end cover 8, the outer filter cartridge 11 and the inner filter cartridge 13 are arranged coaxially.

[0023] An elastic bracket is arranged between the inner filter cartridge 13 and the outlet end cover 7, and the elastic bracket includes an inner end cover 16. One end of the inner end cover 16 is connected to the outlet end cover 7 through an elastic metal sheet 17. There are multiple elastic metal sheets 17, which are evenly spaced along the circumference of the inner end cover 16. The medium passes through adjacent elastic metal sheets 17 and enters the outlet joint 2 through the outlet end cover 7.

[0024] The inner filter cartridge 13 is placed between the inner end cover 16 and the closed end cover 8 . Both the inner end cover 16 and the closed end cover 8 are provided with an inner sealing groove 18 . A first sealing gasket is fixed in the inner sealing groove 18 . The end of the inner filter cartridge 13 is placed in the inner sealing groove 18 .

[0025] A spring 19 is provided between the closed end cover 8 and the bottom cover 3 , and the spring 19 enables the outer filter cartridge 11 and the inner filter cartridge 13 to be tightly pressed against the corresponding sealing gaskets to ensure the sealing performance; at the same time, it also prevents the outlet end cover 7 from falling off from the outlet joint 2 .

[0026] The method of using the low pressure difference filter is as follows: the medium enters the barrel 1 through the inlet joint 5, a part of the medium enters the outlet channel 15 after being filtered by the outer filter cartridge 11, and then flows out through the outlet end cover 7 and the outlet joint 2; a part of the medium enters the inner filter cartridge 13 through the one-way check valve 14, enters the outlet channel 15 after being filtered by the inner filter cartridge 13, and then flows out through the outlet end cover 7 and the outlet joint 2. When the filter element assembly needs to be cleaned or replaced, the bottom cover 3 is removed and the filter element assembly can be directly taken out. The inner frame 10 is a metal frame, etc., and can be directly cleaned. The outer filter cartridge 11 and the inner filter cartridge 13 can be cleaned or directly replaced with new ones as needed.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low pressure difference filter for a refrigeration system, comprising a barrel body, an outlet joint is fixed at one end of the barrel body, a detachable bottom cover is arranged at the other end, an inlet joint is arranged on the side wall of the barrel body, and a filter element assembly is arranged in the barrel body, characterized in that: The filter element assembly includes an outlet end cover and a closed end cover. The outlet end cover is sealingly sleeved on the outlet joint. A spring is arranged between the closed end cover and the bottom cover. A detachable outer filter cartridge and an inner filter cartridge are arranged between the outlet end cover and the closed end cover. The inner filter cartridge is located on the inner side of the outer filter cartridge. The interval between the inner filter cartridge and the outer filter cartridge is an outlet channel. An elastic bracket is arranged between the inner filter cartridge and the outlet end cover. An inlet hole is arranged in the middle of the closed end cover. The inlet hole is communicated with the inner side of the inner filter cartridge. A one-way check valve is arranged in the inlet hole.

2. A low pressure difference filter for a refrigeration system according to claim 1, characterized in that: The elastic support comprises an inner end cover, which is connected to the outlet end cover through an elastic metal sheet, and the inner filter cartridge is arranged between the inner end cover and the closed end cover.

3. A low pressure difference filter for a refrigeration system according to claim 1 or 2, characterized in that: An inner frame is also arranged between the outlet end cover and the closed end cover. One end of the inner frame is fixedly connected to the outlet end cover, and the other end is a free end. The free end abuts against the closed end cover, and the outer filter cartridge is sleeved on the outer side of the inner frame.

4. A low pressure difference filter for a refrigeration system according to claim 2, characterized in that: Both the inner end cover and the closed end cover are provided with an inner sealing groove, a first sealing gasket is provided in the inner sealing groove, and the end of the inner filter cartridge is placed in the inner sealing groove.

5. The low pressure difference filter for refrigeration system according to claim 3, characterized in that: The outlet end cover and the closed end cover are both provided with an outer sealing groove, a second sealing gasket is arranged in the outer sealing groove, the end of the outer filter cartridge is placed in the corresponding outer sealing groove, and the free end of the inner frame is placed in the outer sealing groove of the closed end cover.

6. A low pressure difference filter for a refrigeration system according to claim 1, characterized in that: The inner port of the inlet joint is placed in the barrel body, and a baffle is fixed to the inner port, and a diversion hole is arranged between the inner port and the baffle.

7. The low pressure difference filter for refrigeration system according to claim 1, characterized in that: A first sealing ring is arranged between the outlet end cover and the outlet joint.

8. The low pressure difference filter for refrigeration system according to claim 1, characterized in that: The barrel body and the bottom cover are connected by bolts, and a second sealing ring is arranged between the barrel body and the bottom cover.

Images