Fluorinated filtering device

Abstract

The utility model relates to a fluoridation filtering device. The fluorination filtering device comprises a drying filter and a verification adsorber which are connected in sequence, the drying filter is detachably communicated and connected with the verification adsorber, so that Freon to be purified sequentially flows through the drying filter and the verification adsorber to realize drying and dehydration; a Freon inlet is formed in one end, far away from the verification adsorber, of the drying filter; a Freon outlet is formed in one end, far away from the drying filter, of the verification adsorber. According to the fluoridation filtering device, it is ensured that moisture of Freon is effectively absorbed through verification and double filtration, moisture is visually recognized from the source and directly prevented from entering a refrigerating machine, the operation efficiency and safety of the refrigerating machine are improved, and the service life of the refrigerating machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a fluorine adding and filtering device. Background Art

[0002] Freon, as a refrigerant, can have a range of adverse effects on refrigerators if it is not pure and contains impurities. For example, impure Freon can affect the heat exchange efficiency of the refrigerant in the evaporator and condenser, resulting in a decrease in cooling performance.

[0003] Typically, workers connect the Freon gas source to the refrigerator via a fluorine hose for fluorination. A fluorine meter is located between the hose and the refrigerator. This meter is a crucial tool during refrigerator or air conditioner repair and maintenance. It accurately controls and measures the refrigerant charge, ensuring proper operation and cooling performance of the refrigeration system.

[0004] Freon has a low solubility in water and is insoluble in water. Water entering the refrigeration unit from the low-temperature side is in the form of water vapor. It, along with the Freon, is compressed by the unit's internal compression mechanism and enters the condenser, where it is condensed into a liquid state. Water droplets mixed with the Freon liquid freeze into ice in the low-temperature system, causing ice blockage. Furthermore, because water is an incompressible substance, once it enters the compressor mechanism of the refrigerator, it damages it and causes liquid hammer. Furthermore, water entering the refrigerator can cause the Freon to hydrolyze, producing acidic substances.

[0005] In reality, if Freon containers are not sealed or damaged during storage and transportation, they can come into contact with other substances in the environment and become turbid. If impure or counterfeit Freon is added directly from a Freon drum through a fluorine filling station to a refrigerator, the impure water in the Freon can directly enter the refrigerator, causing ice blockage in the refrigerator's intake filter, affecting the refrigerator's efficiency and resulting in resource waste. Utility Model Content

[0006] In view of the above-mentioned defects of the prior art, the present invention provides a fluorination filtration device, wherein the fluorination filtration device includes a drying filter and a verification adsorber connected in sequence; the drying filter and the verification adsorber are detachably connected so that the Freon to be purified flows through the drying filter and the verification adsorber in sequence to achieve drying and dehydration; the drying filter is provided with a Freon inlet at one end away from the verification adsorber; and the verification adsorber is provided with a Freon outlet at one end away from the drying filter.

[0007] In the fluorination filtration device as described above, optionally, the drying filter includes a shell and a filter element, and the filter element is installed inside the shell; the verification adsorber includes a transparent tube body and a drying indicator, and the drying indicator is filled in the inner cavity of the transparent tube body; the fluorination filtration device is configured so that the Freon to be purified flows through the filter element and the transparent tube body in sequence.

[0008] In the fluorination and filtering device as described above, optionally, an inlet pressure gauge is provided at the Freon inlet, and an outlet pressure gauge is provided at the Freon outlet.

[0009] In the aforementioned fluorination and filtration device, optionally, a safety valve is provided at the bottom of the drying filter.

[0010] In the fluorination filtration device as described above, optionally, the shell is provided with a first end cover at one end connected to the verification adsorber, and the verification adsorber is provided with a second end cover at one end connected to the first end cover; the drying filter and the verification adsorber are detachably connected through the first end cover and the second end cover.

[0011] In the aforementioned fluorination filtration device, optionally, the drying indicator is color-changing silica gel particles.

[0012] In the fluorination and filtration device as described above, optionally, the verification adsorber is provided with a silica gel filter collection net at one end of the transparent tube body close to the Freon outlet.

[0013] In the fluorination filtration device as described above, optionally, the silica gel filter collection net is a 100-mesh outlet filter net.

[0014] In the aforementioned fluorination and filtration device, optionally, the transparent tube body is made of PVC or organic glass.

[0015] In the fluorination filtration device as described above, optionally, the drying filter is can-shaped, the shell is made of steel, and the outer coating is epoxy resin electrostatic spray paint.

[0016] The utility model provides a fluorine addition and filtering device that ensures the effective absorption of moisture in Freon through verification and double filtration, intuitively identifies and directly prevents moisture from entering the refrigerator from the source, reduces ice blockage in the refrigerator, and improves the operating efficiency, safety and service life of the refrigerator.

[0017] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a fluorination and filtering device provided by the utility model.

[0019] Figure numerals: 1-drying filter; 11-housing; 12-filter element; 13-first end cap; 2-verification adsorber; 21-transparent tube; 22-drying indicator; 23-silica gel filter capture net; 24-second end cap; 3-Freon inlet; 31-inlet pressure gauge; 32-inlet valve; 4-Freon outlet; 41-outlet pressure gauge; 42-outlet valve; 5-safety valve. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects of the utility model easier to understand, the utility model is further explained below with reference to specific diagrams. However, the utility model is not limited to the following implementation cases.

[0021] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in this utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0022] Terms such as “comprise” and “include” indicate that in addition to the components directly and clearly stated in the specification and claims, the technical solution of the present invention does not exclude the situation where it has other components that are not directly or clearly stated.

[0023] In addition, the terms "first" and "second" are used only for descriptive purposes to distinguish one entity or operation from another entity or operation, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or any such actual relationship or order between these entities or operations. For any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, the present invention still allows for any combination or deletion between these technical features (or their equivalents) without any technical obstacles, and thus it should be considered that these more embodiments according to the present invention are also within the scope of the description herein.

[0024] It should also be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0025] The utility model designs a fluorine adding and filtering device for double moisture filtering and verification between a Freon gas source and a refrigerator.

[0026] Figure 1 It is a structural schematic diagram of a fluorination and filtering device provided by the utility model.

[0027] like Figure 1 The fluorination filtration device shown may include a drying filter 1 and a verification adsorber 2. The drying filter 1 and the verification adsorber 2 are detachably installed in sequence, and the Freon to be purified passes through the drying filter 1 and the verification adsorber 2 in sequence. It should be noted here that Figure 1 The figure shows only the situation where the filter dryer 1 is at the bottom and the verification adsorber 2 is at the top, and the filter dryer 1 and the verification adsorber 2 are connected in sequence from bottom to top. However, in the actual fluorination process, it is sufficient to ensure that the Freon first passes through the filter dryer 1 and then passes through the verification adsorber 2, that is, the Freon enters the filter dryer 1 and then passes out through the verification adsorber 2. In this embodiment, the Freon inlet 3 is located at the end of the filter dryer 1 away from the verification adsorber 2, and the Freon outlet 4 is located at the end of the verification adsorber 2 away from the filter dryer 1. The Freon inlet 3 is connected to the Freon gas source (not shown) outside the fluorination filtration device for air intake. An air intake valve 32 is provided at the Freon inlet 3 to control the flow of Freon from the gas source to the filter dryer 1. In this embodiment, the Freon gas source can be canned Freon. In other optional embodiments, the Freon gas source can also be other gas sources for providing Freon, usually by using a compressor to convert gaseous Freon into liquid state and add it to the refrigerator to achieve the purpose of refrigeration. An outlet valve 42 is provided at the Freon outlet 4 for controlling the flow of Freon to the refrigerator, and the Freon outlet 4 is connected to a refrigerator (not shown) outside the fluorination filter device for fluorination.

[0028] In the present invention, filter drier 1 is used for preliminary filtration of Freon, and verification adsorber 2 is used for verification and adsorption of the Freon after preliminary filtration by filter drier 1. Verification adsorber 2 has two functions: verification and adsorption. These two functions can be simultaneously achieved by dryness indicator 22, which will be described in detail later.

[0029] Specifically, the verification adsorber 2 verifies whether the Freon, after being adsorbed by the filter drier 1, contains any moisture. If moisture is present, a secondary filtration and adsorption process is performed. Since the verification adsorber 2 has absorbed moisture, it directly indicates to the operator through a color change that the Freon still contains moisture. At this point, the operator can replace the filter element 12 inside the filter drier 1 and suspend the addition of Freon.

[0030] The overall idea of ​​the present invention is that the Freon enters from one end of the drying filter 1 and is preliminarily dried in the drying filter 1. Then, the preliminarily dried Freon enters the verification adsorber 2 from the drying filter 1 and verifies through the dryness indicator 22 contained therein whether the Freon that has been filtered once through the drying filter 1 still contains moisture and performs secondary adsorption filtration to ensure that the Freon entering the refrigerator does not contain moisture.

[0031] In such Figure 1 In the illustrated embodiment, the filter drier 1 includes a housing 11 and a filter element 12. The filter drier 1 is canister-shaped, with the housing 11 made of steel and coated with an epoxy resin electrostatic spray paint. In this embodiment, the filter element 12 can be Emerson DF84 or D48. In other optional embodiments, the filter element 12 can be selected in terms of model and capacity based on actual operational requirements; different models correspond only to different filter element 12 capacities.

[0032] The housing 11 of the drying filter 1 is provided with a first end cap 13 at the connection end with the verification adsorber 2. The first end cap 13 and the housing 11 itself are detachably separated by fixing screws at both ends, so that the filter element 12 can be replaced. A filter element shaft for supporting and fixing the filter element 12 is axially extended toward the inside of the housing 11 at the first end cap 13 of the housing 11. The filter element 12 is sleeved on the outer periphery of the filter element shaft and installed in the interior of the housing 11 along the axial direction. In addition, an air outlet channel is extended toward the verification adsorber 2 at the first end cap 13 for directly passing the preliminarily filtered Freon into the verification adsorber 2. A second end cap 24 is detachably provided at the end connection between the verification adsorber 2 and the drying filter 1. The first end cap 13 is connected to the second end cap 24. In an optional embodiment, the outer wall of the outlet passage of the first end cap 13 may be provided with external threads, and the inner wall of the second end cap 24 may be provided with internal threads corresponding to the external threads of the first end cap 13, so that the first end cap 13 and the second end cap 24 can be interlocked and installed, thereby connecting the filter drier 1 to the verification adsorber 2. In addition to being used for connection, the second end cap 24 can also serve to inspect and replace the internal dryness indicator 22.

[0033] like Figure 1As shown, the verification adsorber 2 may specifically include a transparent tube 21 and a dryness indicator 22, which is filled within the inner cavity of the transparent tube 21. The transparent tube 21 is used in this invention to more intuitively determine whether moisture is still present in the Freon after it has been filtered through the filter dryer 1 based on the color change of the dryness indicator 22. Furthermore, the transparent tube 21 allows personnel to determine the flow rate of the Freon.

[0034] In this embodiment, the drying indicator 22 uses existing color-changing silica gel particles. Color-changing silica gel is an indicator-type adsorbent with high added value and high technical content, which is made from fine-porous silica gel with high activity adsorption material as the basic raw material through deep processing. It belongs to an adsorption desiccant and has a very strong adsorption effect on water vapor in the medium. The drying indicator 22 in this embodiment can specifically be blue silica gel particles. Blue silica gel can be divided into blue glue indicator, color-changing silica gel and blue glue. The appearance is blue or light blue glass-like particles. According to the shape of the particles, it can be divided into spherical and blocky types. It has the characteristic that its own color changes from blue to red after absorbing moisture, and its color will change with different humidity. In addition, this color-changing silica gel can be regenerated. Specifically, the adsorbed moisture can be removed by thermal desorption (such as hot air drying), but this is not the focus of the present invention and will not be described in detail here.

[0035] It should be noted that the color of the color-changing silica gel itself and the color after the color-changing silica gel changes color when it meets water do not affect the technology of the present application. As long as the color-changing silica gel changes color when it meets water, the color of the color-changing silica gel itself is not limited in the present application. The drying indicator 22 is only used to indicate whether the freon after passing through the drying filter 1 still contains water and to adsorb the water, so that the staff can visually observe the color-changing drying indicator 22 when it meets water and re-adsorb the water in the freon. To be precise, the verification adsorber 2 shows the color change of the drying indicator 22 through the transparent tube 21 only when the drying indicator 22 changes color after re-adsorbing the water, and the amount of water in the freon can be determined according to the amount of color change of the particles in the drying indicator 22. If the drying indicator 22 changes color, it means that it has re-adsorbed water. When the staff observes that the drying indicator 22 in the transparent tube 21 has changed color, it is determined that the freon after passing through the drying filter 1 still contains water, the fluorine addition is stopped, and the filter element 12 of the drying filter 1 is replaced. Of course, the staff can also open the first end cover 13 of the shell 11 of the drying filter 1 to observe whether the filter element 12 inside has completely changed color after finding that the drying indicator 22 in the transparent tube 21 has changed color, and replace the filter element 12 and stop fluorine addition. The reason why the staff needs to replace the filter element 12 of the drying filter 1 immediately after observing that the drying indicator 22 in the transparent tube 21 has changed color is that: first, the filter element 12 of the drying filter 1 may have been saturated and has adsorbed the maximum amount of water it can hold. If only a small part of the particles in the drying indicator 22 changes color at this time, it may not be directly attributed to the impurity of the freon itself, and the staff can determine whether to continue fluorine addition according to their own experience after replacing the filter element 12 of the drying filter; second, if the filter element 12 of the drying filter 1 is replaced several times and it is found that the drying indicator 22 in the verification adsorber 2 still changes color, it is obvious that the freon itself is impure and contains too much water.

[0036] In an optional embodiment, the transparent tube 21 can be made of PVC (polyvinyl chloride) or organic glass. The transparent tube 21 can have different size specifications, such as a length of 220 mm and an outer diameter Φ in the range of 30 mm-60 mm. In this embodiment, the outer diameter of the transparent tube 21 can be 30 mm, 40 mm, 50 mm or 60 mm to provide the staff with flexible options for accommodating different amounts of drying indicator 22.

[0037] In order to prevent the drying indicator 22 from flowing to the refrigerator together with the freon, such as Figure 1As shown, a silica gel filter collection net 23 is provided at one end of the verification adsorber 2 near the freon outlet 4. In this embodiment, the silica gel filter collection net 23 is a 100 mesh outlet filter net.

[0038] An inlet pressure gauge 31 is provided at the Freon inlet 3 to indicate the pressure of the incoming Freon, and an outlet pressure gauge 41 is provided at the Freon outlet 4 to indicate the pressure of the outgoing Freon. When the outgoing Freon pressure is lower than the inlet pressure, it indicates that the filter element 12 of the filter drier 1 is clogged and should be replaced promptly.

[0039] In this embodiment, in order to further ensure the safety of the fluorination filter device, the utility model is further provided with a safety valve 5 at the bottom of the drying filter 1 to prevent the internal pressure of the fluorination filter device from overloading and causing explosion, so as to facilitate pressure relief. Optionally, the safety valve 5 is provided on the base of the drying filter 1, and the base is detachably connected to the shell 11 of the drying filter 1 by fixing screws at both ends. Under normal conditions, the safety valve 5 will always remain in a closed state. Once it is detected that the internal pressure of the entire space of the drying filter 1 connected to the verification adsorber 2 exceeds the safety value, the safety valve 5 will automatically open, allowing part of the medium (such as gas, liquid or steam) to be discharged therefrom to reduce the pressure inside the device. As the medium is discharged, the internal pressure of the device gradually decreases to a safe range, the safety valve 5 will automatically close, stop the discharge of the medium, and the fluorination filter device continues to operate normally.

[0040] It should be noted that while the safety valve 5 itself does not necessarily include an independent electronic or digital pressure detection module, it does include sensitive pressure-sensing components, such as springs, levers, or directly actuated valve discs, which enable rapid response to pressure changes. The safety valve 5 primarily operates by mechanically responding to pressure changes. Common safety valves 5 include spring-loaded, lever-loaded, pulse-loaded, and deadweight-loaded valves. Specifically, spring-loaded safety valves use a spring to provide closing force. When pressure exceeds the spring force, the valve disc is pushed open, allowing the medium to escape. Lever-loaded safety valves use a lever and a weight to provide closing force. When pressure rises sufficiently to overcome the weight of the weight, the valve disc automatically opens. Pulse-loaded safety valves are commonly used in steam boilers. They utilize steam pressure to directly act on the valve disc, opening it when pressure exceeds a set value. Deadweight-loaded safety valves rely on the deadweight of the valve disc to maintain a closed position. When pressure exceeds the weight of the disc, the disc is pushed open.

[0041] In this embodiment, safety valve 5 employs the aforementioned spring-loaded safety valve. Alternatively, safety valve 5 may employ the aforementioned pulse-type safety valve, further coupled with a pressure sensor or transmitter. These sensors provide electronic signals for monitoring the pressure within the fluorination and filtration device or triggering an alarm when a pressure threshold is exceeded. However, the discharge function of safety valve 5 itself is independent of these sensors and can function normally even in the absence of an electronic signal. The pressure threshold, safety value, or range can be set by personnel.

[0042] Because liquids are incompressible, once they enter a refrigerator (or compressor), they damage the internal compression mechanism. The fluorination filter device provided by this utility model effectively absorbs moisture from Freon through verification and double filtration, intuitively identifying and directly preventing moisture from entering the refrigerator, thereby improving the refrigerator's operating efficiency, safety, and service life. Those skilled in the art can use this fluorination filter device to filter the Freon gas source before adding fluorine to the refrigerator using an existing fluorination meter.

[0043] The above describes in detail the preferred embodiments of the present invention. It should be understood that numerous modifications and variations based on the concepts of the present invention can be made by those skilled in the art without inventive effort. Therefore, any technical solution that can be derived by a person skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology shall be within the scope of protection defined by the claims.

Claims

1. A fluorination filtration device, characterized in that: The invention comprises a drying filter (1) and a verification adsorber (2) connected in sequence; the drying filter (1) and the verification adsorber (2) are detachably connected so that the Freon to be purified flows through the drying filter (1) and the verification adsorber (2) in sequence, thereby achieving drying and dehydration; the drying filter (1) is provided with a Freon inlet (3) at one end away from the verification adsorber (2); and the verification adsorber (2) is provided with a Freon outlet (4) at one end away from the drying filter (1).

2. The fluorination filtration device according to claim 1, characterized in that: The drying filter (1) comprises a housing (11) and a filter element (12), wherein the filter element (12) is installed inside the housing (11); the verification adsorber (2) comprises a transparent tube (21) and a drying indicator (22), wherein the drying indicator (22) is filled in the inner cavity of the transparent tube (21); and the fluorination filtering device is configured such that the Freon to be purified flows through the filter element (12) and the transparent tube (21) in sequence.

3. The fluorination filtration device according to claim 1 or 2, characterized in that: An inlet pressure gauge (31) is provided at the Freon inlet (3), and an outlet pressure gauge (41) is provided at the Freon outlet (4).

4. The fluorination filtration device according to claim 1 or 2, characterized in that: A safety valve (5) is provided at the bottom of the drying filter (1).

5. The fluorination filtration device according to claim 2, characterized in that: The housing (11) is provided with a first end cap (13) at one end connected to the verification adsorber (2), and the verification adsorber (2) is provided with a second end cap (24) at one end connected to the first end cap (13); the drying filter (1) and the verification adsorber (2) are detachably connected via the first end cap (13) and the second end cap (24).

6. The fluorination filtration device according to claim 2, characterized in that: The drying indicator (22) is color-changing silica gel particles.

7. The fluorination filtration device according to claim 6, characterized in that: The verification adsorber (2) is provided with a silica gel filter collection net (23) at one end of the transparent tube (21) near the Freon outlet (4).

8. The fluorination filtration device according to claim 7, characterized in that: The silica gel filter collection net (23) is a 100-mesh outlet filter net.

9. The fluorination filtration device according to claim 2, characterized in that: The transparent tube (21) is made of PVC or organic glass.

10. The fluorination filtration device according to claim 2, characterized in that: The drying filter (1) is can-shaped, the housing (11) is made of steel, and the outer coating is epoxy resin electrostatic spray paint.

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