Refrigerant purification device and air conditioning unit

Abstract

The utility model discloses refrigerant purification device and air conditioning unit, refrigerant purification device includes: casing, the cooler of being located in the casing, the air inlet pipe of connecting casing and be used for detecting the detection assembly of refrigerant gas in different areas in casing, casing still is connected with circulating pipe and exhaust pipe, and circulating pipe sends back the gas after the cooler separation in casing through the air pump, and the gas after the cooler separation is discharged outward through the exhaust pump of exhaust pipe, wherein, circulating pipe and exhaust pipe all install valve, and valve receives the detection signal of detection assembly, makes circulating pipe and exhaust pipe at most have one be connected.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to a refrigerant purification device and an air conditioning unit. Background Technology

[0002] Air conditioning units are the core equipment for achieving indoor thermal comfort, and centrifugal chillers, as the "heart" of large central air conditioning systems, are widely used in commercial complexes, data centers, and industrial sites due to their high-efficiency cooling capacity and large capacity. These units compress the refrigerant using a centrifugal compressor, cool and liquefy it in a condenser, and then absorb heat through throttling evaporation, thus achieving a continuous cooling cycle. However, it is precisely this working principle, which relies on phase change heat transfer, that makes the system have stringent requirements for the purity of the refrigerant.

[0003] Of particular concern is the fact that centrifugal chillers using negative-pressure refrigerants (such as low-pressure refrigerants like R1233zd), while offering environmental advantages, often maintain a negative pressure state on their evaporator side during operation. This negative pressure environment acts like an invisible gravitational pull, causing even the smallest sealing flaws to allow outside air to continuously seep into the system. Over time, this intruding air mixes with the refrigerant to form non-condensable gases, hindering normal circulation. When the contaminated refrigerant enters the condenser, the gaseous refrigerant can be condensed into a liquid by the cooling water, while the non-condensable gases, such as air, stubbornly remain gaseous, eventually accumulating like foam at the top of the condenser. This gas-liquid separation not only encroaches on effective heat exchange space but also forms an insulation layer, leading to increased condensing pressure, increased compressor power consumption, and in severe cases, even causing the unit to surge and shut down.

[0004] With the development of automation technology, automated refrigerant purification devices have emerged in existing technologies, such as exhaust systems that use timed control or pressure sensing. Although these devices achieve automatic gas discharge through mechanical valves or basic electronic control, most devices lack high-precision concentration detection capabilities and cannot monitor the mixing state of refrigerant and non-condensable gases inside the casing in real time. This results in inaccurate exhaust timing, which may lead to over-exhausting or incomplete discharge.

[0005] Therefore, how to design refrigerant purification devices and air conditioning units that can improve exhaust accuracy is a technical problem that the industry urgently needs to solve. Utility Model Content

[0006] To address the shortcomings of existing technologies, such as excessive or incomplete exhaust, this invention proposes a refrigerant purification device and an air conditioning unit. By arranging refrigerant gas sensors in different areas within the casing, precise monitoring of the refrigerant purification process is achieved, effectively improving exhaust accuracy and ensuring stable operation of the air conditioning unit.

[0007] The technical solution adopted in this utility model is to design a refrigerant purification device, including: a shell, a cooler disposed inside the shell, an inlet pipe connected to the shell, and a detection component for detecting refrigerant gas in different areas inside the shell. The shell is also connected to a circulation pipe and an exhaust pipe. The circulation pipe sends the gas separated by the cooler back into the shell through a vacuum pump, and the exhaust pipe discharges the gas separated by the cooler to the outside through an exhaust pump. Both the circulation pipe and the exhaust pipe are equipped with valves, which are electrically connected to the detection component, and at most one of the circulation pipe and the exhaust pipe can be connected.

[0008] Furthermore, the upper part of the housing is a purification and detection area, which is provided with an air outlet. The inlet end of the circulation pipe and the inlet end of the exhaust pipe are both connected to the air outlet. The detection component includes: at least two main sensors located in the purification and detection area at different heights, with the normally functioning main sensor as the effective main sensor. The valve receives the detection signal from the effective main sensor, so that at most one of the circulation pipe and the exhaust pipe is connected.

[0009] Furthermore, a liquid collection area is provided at the bottom of the casing, and a heating device is provided in the liquid collection area. The heating device is used to provide heat to release the refrigerant gas in the liquid collection area. The casing is also connected to a recovery pipe, which supplies refrigerant gas to the outside through a vacuum pump. The recovery pipe is equipped with a recovery valve, and the recovery valve and the heating device have the same on / off state.

[0010] Furthermore, the housing is provided with a recovery detection zone located above the liquid collection area; the detection assembly also includes at least two auxiliary sensors located in the recovery detection zone at different heights, with the normally functioning auxiliary sensor serving as the effective auxiliary sensor, and the recovery valve receiving the detection signal from the effective auxiliary sensor to close the recovery pipe.

[0011] Furthermore, the liquid collection area is filled with soluble refrigerant liquid, and the liquid collection area is equipped with an air inlet. The outlet end of the air inlet pipe and the outlet end of the circulation pipe are both connected to the air inlet.

[0012] Furthermore, the housing is equipped with a diffuser connected to the air inlet, and the diffuser has multiple diffusion holes for injecting gas outward.

[0013] Furthermore, the cooler includes: a cold plate, multiple cold plates are spaced apart and inclined within the housing to form a tortuous airflow channel, and the gas within the housing flows upward along the tortuous airflow channel.

[0014] Furthermore, the middle of each cold plate is arched upwards and the edges are tilted downwards, making the cold plate shape like an umbrella. In any two adjacent cold plates, one cold plate has openings on both sides to allow airflow, and the other cold plate has an opening in the middle to allow airflow.

[0015] Furthermore, the interior of the cold plate is equipped with a cooling chamber for the circulation of coolant.

[0016] This utility model also proposes an air conditioning unit, including: a refrigerant circulation loop and the aforementioned refrigerant purification device.

[0017] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0018] 1. By arranging refrigerant gas sensors in different areas inside the casing, the refrigerant purification process is accurately monitored, effectively improving exhaust accuracy and ensuring stable unit operation;

[0019] 2. By using the dual action of soluble refrigerant liquid and cold plate to purify and separate the mixed gas, the separation efficiency is effectively improved. Attached Figure Description

[0020] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of the refrigerant purification device of this utility model;

[0022] Figure 2 This is a schematic diagram of the gas flow direction during the air intake process of this utility model;

[0023] Figure 3 This is a schematic diagram of the gas flow direction in the refrigerant purification process of this utility model;

[0024] Figure 4 This is a schematic diagram of the flow direction during the discharge of non-condensable gases according to this utility model;

[0025] Figure 5 This is a schematic diagram of the flow direction of the process for recovering purified refrigerant gas according to this utility model;

[0026] Figure 6 This is a bottom view of the cooler of this utility model;

[0027] Figure 7 yes Figure 6 A cross-sectional schematic diagram of AA in the middle;

[0028] Figure Descriptions: 1. Shell; 1a. Purification and Detection Area; 1b. Recovery and Detection Area; 1c. Liquid Collection Area; 2. Cooler; 21. Cold Plate; 3. Inlet Pipe; 31. Inlet Valve; 4. Circulation Pipe; 41. Circulation Valve; 5. Exhaust Pipe; 51. Exhaust Valve; 6. Recovery Pipe; 61. Recovery Valve; 7. Vacuum Pump; 8. Exhaust Pump; 9. Purification Valve; 10. Soluble Refrigerant Liquid; 11. Heating Device; 12. Diffuser; 13. First Sensor; 14. Second Sensor; 15. Third Sensor; 16. Fourth Sensor. Detailed Implementation

[0029] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0030] like Figure 1 As shown, the refrigerant purification device proposed in this utility model includes: a shell 1, a cooler 2, an air inlet pipe 3, a circulation pipe 4, an exhaust pipe 5, and detection components, etc.

[0031] like Figures 2 to 4 As shown, the housing 1 is usually installed vertically. The bottom of the housing 1 is provided with an air inlet. The outlet end of the air inlet pipe 3 and the outlet end of the circulation pipe 4 are both connected to the air inlet of the housing 1. The cooler 2 is located inside the housing 1, and the air inlet is located below the cooler 2. The air inlet pipe 3 sends the mixed gas to be separated to the air inlet through the air pump 7. After the mixed gas enters the housing 1 from the air inlet, it flows upward and passes through the cooler 2. The cooler 2 cools and condenses the gaseous refrigerant into liquid refrigerant. The liquid refrigerant can flow downward and collect at the bottom of the housing 1.

[0032] The top of the housing 1 is provided with an air outlet, which is located above the cooler 2. The gas separated by the cooler 2 flows out of the housing 1 through the air outlet. The inlet end of the circulation pipe 4 and the inlet end of the exhaust pipe 5 are both connected to the air outlet. The circulation pipe 4 sends the gas separated by the cooler 2 back into the housing 1 through the air pump 7. The exhaust pipe 5 discharges the gas separated by the cooler 2 to the outside through the exhaust pump 8.

[0033] The shape of the housing 1 can be designed according to the usage requirements. For example, the shape can be cylindrical. The top of the housing 1 is in the form of an upward convex bulge. In order to facilitate precise control of the direction of the separated gas, the top of the housing 1 is provided with two gas outlets. The inlet end of the circulation pipe 4 is connected to one gas outlet, and the inlet end of the exhaust pipe 5 is connected to the other gas outlet.

[0034] The detection component is used to detect refrigerant gas in different areas within the housing 1. Both the circulation pipe 4 and the exhaust pipe 5 are equipped with valves, which are electrically connected to the detection component. At most one of the circulation pipe 4 or the exhaust pipe 5 can be connected. For example... Figures 3 to 4 As shown, specifically, the valve of the circulation pipe 4 is called the circulation valve 41, and the valve of the exhaust pipe 5 is called the exhaust valve 51. The circulation valve 41 and the exhaust valve 51 receive the detection signal from the detection component. If a detection signal indicating the presence of refrigerant gas is received—meaning that there is still refrigerant gas in the separated gas—it indicates that the separation is not complete. The circulation valve 41 opens and sends the mixed gas back to the housing 1 for separation. If a detection signal indicating the absence of refrigerant gas is received—meaning that there is no refrigerant gas in the separated gas—it indicates that the separation is complete. The exhaust valve 51 opens and discharges the separated non-condensable gas.

[0035] This design achieves precise monitoring of the refrigerant purification process by arranging refrigerant gas sensors in different areas within the casing 1. Changes in the detected signals (presence / absence of refrigerant gas) switch the switching on / off of the circulation pipe 4 and the exhaust pipe 5. If no refrigerant gas is detected during the purification process, the circulation valve 41 can be immediately closed and the exhaust valve 51 opened to promptly discharge non-condensable gases, improving exhaust accuracy. If, during the exhaust process, it is detected that refrigerant gas is about to be mistakenly discharged, the exhaust valve 51 can be immediately closed and the circulation valve 41 opened to prevent accidental discharge of refrigerant and ensure stable unit operation.

[0036] like Figure 1 As shown, in some embodiments of this utility model, the upper part of the housing 1 is a purification and detection zone 1a, and the air outlet of the housing 1 is located in the purification and detection zone 1a. The detection assembly includes at least two main sensors, which are located in the purification and detection zone 1a at different heights. The purpose of designing multiple main sensors is to prevent false alarms or misreports. The main sensor that is working normally is used as the effective main sensor. The circulation valve 41 and the exhaust valve 51 receive the detection signal from the effective main sensor, so that at most one of the circulation pipe 4 and the exhaust pipe 5 is connected.

[0037] like Figures 2 to 4 As shown, specifically, if none of the effective main sensors detect refrigerant gas, it means that there is no refrigerant gas in the purification detection zone 1a. The circulation valve 41 can be closed and the exhaust valve 51 can be opened to discharge the non-condensable gas from the housing 1. If the highest effective main sensor detects refrigerant gas, it means that the non-condensable gas has been discharged completely. The exhaust valve 51 needs to be closed and the circulation valve 41 opened to prevent the refrigerant gas from being accidentally discharged.

[0038] This invention sets multiple main sensors at different heights in the purification detection area 1a at the upper part of the housing 1, and controls the circulation valve 41 and the exhaust valve 51 based on the detection signals of the effective main sensors. Through valve linkage control, it ensures that at most one of the circulation pipe 4 and the exhaust pipe 5 is connected, so that the non-condensable gas is discharged more thoroughly and the purification efficiency is significantly improved. Furthermore, by utilizing the gas stratification characteristics, the highest sensor detects the refrigerant gas and accurately determines that the non-condensable gas discharge is complete, avoiding the mis-discharge of refrigerant.

[0039] like Figure 1As shown, in some embodiments of this utility model, a liquid collection area 1c is provided at the bottom of the housing 1. A heating device 11 is provided in the liquid collection area 1c. The heating device 11 provides heat to release the refrigerant gas in the liquid collection area 1c. The heating device 11 includes, but is not limited to, a coiled electric heater, which is coiled and arranged within the liquid collection area 1c. The housing 1 is also connected to a recovery pipe 6. The recovery pipe 6 supplies refrigerant gas to the outside via a vacuum pump 7 to achieve refrigerant reuse. A recovery valve 61 is installed on the recovery pipe 6. The recovery valve 61 and the heating device 11 have the same on / off state. When the heating device 11 is started, the recovery valve 61 opens synchronously; when the heating device 11 stops working, the recovery valve 61 closes immediately.

[0040] like Figure 5 As shown, during the operation of the refrigerant purification device, when the non-condensable gas discharge is detected to be complete, the heating device 11 is started to gradually increase the temperature of the liquid collection zone 1c. As the temperature rises, a large amount of refrigerant gas is released. At the same time, the recovery valve 61 is opened and the vacuum pump 7 starts to run, forming a directional refrigerant gas flow to be supplied to the outside. When no refrigerant gas is detected above the liquid collection zone 1c, it indicates that the refrigerant recovery is complete. Then the heating device 11 and the recovery valve 61 are turned off to prepare for the next round of refrigerant purification cycle.

[0041] like Figure 1 As shown, to improve recovery accuracy, a preferred embodiment is a recovery detection zone 1b located above the collection zone 1c within the housing 1. The detection assembly also includes at least two auxiliary sensors located in the recovery detection zone 1b at different heights. The purpose of having multiple auxiliary sensors is to prevent false alarms. The normally functioning auxiliary sensor is used as the effective auxiliary sensor. The recovery valve 61 receives the detection signal from the effective auxiliary sensor, causing the recovery pipe 6 to close. Specifically, after the recovery valve 61 opens, if all effective auxiliary sensors fail to detect refrigerant gas, it indicates that there is no refrigerant gas in the recovery detection zone 1b. The recovery valve 61 and the heating device 11 can then be closed to stop the recovery process.

[0042] It should be understood that since both the purification detection zone 1a and the recovery detection zone 1b are located inside the housing 1, and both the main sensor and the auxiliary sensor are used to detect refrigerant gas, the sensors in the overlapping areas between the purification detection zone 1a and the recovery detection zone 1b can be shared. For example... Figure 1 As shown, taking an application example of this utility model, the detection component includes four sensors arranged from bottom to top, namely a first sensor 13, a second sensor 14, a third sensor 15, and a fourth sensor 16. The first sensor 13 and the second sensor 14 are located in the recycling detection area 1b as auxiliary sensors, and the second sensor 14, the third sensor 15, and the fourth sensor 16 are located in the purification detection area 1a as main sensors. The purification detection area 1a and the recycling detection area 1b share the second sensor 14.

[0043] In addition, in order to make the structure of the refrigerant purification device more compact, in the above embodiment, the air inlet pipe 3, the circulation pipe 4 and the recovery pipe 6 share the same air pump 7. In practical applications, the air inlet pipe 3, the circulation pipe 4 and the recovery pipe 6 can also be equipped with their own power pumps to drive the gas flow. This utility model does not impose any special restrictions on this.

[0044] like Figure 1 As shown, in a preferred embodiment of this invention, the liquid collection zone 1c is filled with a soluble refrigerant liquid 10. The soluble refrigerant liquid 10 refers to a liquid that is miscible with refrigerant gas. This liquid has high solubility with the refrigerant at low or normal temperatures, and can absorb and dissolve the refrigerant gas. However, its solubility with the refrigerant is low at high temperatures, and it can release the absorbed and dissolved refrigerant gas. The soluble refrigerant liquid 10 includes, but is not limited to, lubricating oil or mineral oil, which is not easily volatile and its solubility varies with temperature.

[0045] The collection zone 1c is equipped with an air inlet. The outlet end of the air inlet pipe 3 and the outlet end of the circulation pipe 4 are both connected to the air inlet. The mixed gas is sent to the collection zone 1c from the air inlet. Some of the refrigerant gas is dissolved and absorbed by the soluble refrigerant liquid 10. The remaining mixed gas continues to flow upward and is cooled down by the cooler 2. Some of the refrigerant gas condenses to form liquid refrigerant. The liquid refrigerant can flow downward and collect in the collection zone 1c. If the mixed gas is still not completely purified after passing through the cooler 2, the remaining mixed gas is sent back to the air inlet using the circulation pipe 4. The soluble refrigerant liquid 10 and the cooler 2 are used for multiple circulation separations until the mixed gas is completely purified—the effective main sensor in the purification detection zone 1a cannot detect the refrigerant gas.

[0046] This design purifies and separates the mixed gas through the dual action of soluble refrigerant liquid 10 and cooler 2. In particular, soluble refrigerant liquid 10 can actively absorb refrigerant gas at low temperature, making the refrigerant separation speed faster, effectively improving the separation efficiency, and reducing separation energy consumption.

[0047] like Figure 1 As shown, based on the liquid collection area 1c, a preferred embodiment is that the housing 1 is provided with a diffuser 12 connected to the air inlet, and the diffuser 12 has multiple diffusion holes for spraying gas outward. During the purification process, the mixed gas introduced from the air inlet is dispersed into small bubbles through the diffuser 12, which come into full contact with the soluble refrigerant liquid 10, and the refrigerant gas is quickly dissolved, reducing gas residue.

[0048] like Figures 6 to 7As shown, in some embodiments of this utility model, the cooler 2 includes: a cold plate 21, a plurality of cold plates 21 are spaced apart and inclined in the housing 1 to form a tortuous airflow channel, the gas in the housing 1 flows upward along the tortuous airflow channel, the tortuous path prolongs the gas residence time, increases the contact opportunity with the cooling surface and liquid, and improves the separation accuracy of non-condensable gas.

[0049] Specifically, each cold plate 21 has an upward arch in the middle and a downward slope at the edges, giving it an umbrella-like shape. In any two adjacent cold plates 21, one layer has openings on both sides to allow airflow, while the other layer has an opening in the middle. This umbrella-like design of the cold plates 21, combined with the alternating layout of openings in adjacent layers, forces the gas to change direction multiple times, preventing short-circuiting and ensuring uniform airflow distribution and sufficient cooling. The downward slope at the edges facilitates the collection and downward flow of condensate droplets along the plate wall, reducing the risk of re-evaporation and ultimately enhancing the separation accuracy of non-condensable gases.

[0050] Based on the cold plate 21, a preferred embodiment is that the interior of the cold plate 21 is provided with a cooling chamber for the flow of coolant, which can be a throttled low-temperature refrigerant. When the mixed gas in the shell 1 enters the tortuous airflow channel of the cooler 2, the low-temperature refrigerant in the cooling chamber cools and condenses the gaseous refrigerant into liquid refrigerant. The liquid refrigerant can flow down along the umbrella-shaped cold plate wall into the soluble refrigerant liquid 10 below. At the same time, the low-temperature mixed gas cooled by the cooler 2 is again circulated and sprayed into the soluble refrigerant liquid 10 by the vacuum pump 7, which can cool the soluble refrigerant liquid 10 and improve its ability to dissolve refrigerant.

[0051] like Figure 1 As shown, this utility model also proposes an air conditioning unit, including: a refrigerant circulation loop and the aforementioned refrigerant purification device. The air conditioning unit includes, but is not limited to, a centrifugal chiller. The refrigerant circulation loop is formed by connecting a compressor, a condenser, a throttling element, and an evaporator. The inlet pipe 3 of the refrigerant purification device is connected to the upper part of the condenser, and the mixed gas to be purified is sent into the housing 1 for separation and purification. After purification, the absorbed and dissolved refrigerant gas is released by heating and returned to the refrigerant circulation loop through the recovery pipe 6, thereby achieving the effect of purifying the refrigerant and improving the performance of the unit.

[0052] like Figures 2 to 4 As shown, the refrigerant purification method of the above-mentioned refrigerant purification device includes:

[0053] In the air intake step, a mixture of refrigerant gas and non-condensable gas is introduced into the housing 1 through the air intake pipe 3. The air intake continues until the set conditions for stopping the air intake are met (such as the internal pressure of the housing reaching a preset value or the air intake time reaching a set time, etc.), and then the purification step is performed.

[0054] In the purification step, the air inlet pipe 3 is closed, and the mixed gas is driven to circulate and separate in the housing 1 using the circulation pipe 4 and the air pump 7. The circulation continues until the effective main sensor in the upper part of the housing 1 can no longer detect the refrigerant gas, indicating that the non-condensable gas has been separated, and the waste discharge step is performed.

[0055] In the waste discharge step, close the circulation valve 41, and use the exhaust pipe 5 and exhaust pump 8 to discharge the non-condensable gas (such as air) accumulated on the upper part of the housing 1 to the atmosphere until the highest effective main sensor detects the refrigerant gas, indicating that the non-condensable gas has been discharged and the refrigerant gas has begun to rise. Immediately close the exhaust valve 51 and exhaust pump 8, and the waste discharge step ends.

[0056] This design, based on refrigerant gas sensors arranged in different areas within the housing, intelligently executes a streamlined process of air intake, purification, and exhaust based on the sensor detection signals. It can quickly remove impurities such as air accumulated in the condenser, effectively improving exhaust accuracy and refrigerant purification efficiency.

[0057] like Figure 5 As shown, in a preferred embodiment of this utility model, the refrigerant purification method further includes:

[0058] After the waste discharge step is completed, the recycling step is performed. The heating device 11 at the bottom of the shell 1 is turned on. The heating device 11 provides heat to release refrigerant gas. The refrigerant gas is supplied to the outside using the recycling pipe 6 and the vacuum pump 7. The recycling continues until no refrigerant gas can be detected above the liquid collection area 1c, indicating that the recycling is complete. Then the heating device 11 and the recycling valve 61 are turned off to prepare for the next round of refrigerant purification cycle.

[0059] This design creates a complete closed loop for refrigerant purification and recovery, ensuring stable air intake, efficient purification, precise waste discharge, and recycling, thereby reducing refrigerant waste and ensuring stable unit operation.

[0060] To facilitate understanding, an application example of this utility model will be used below for illustration.

[0061] like Figure 1 As shown, the intake pipe 3, circulation pipe 4 and recovery pipe 6 share a common air pump 7 to drive gas flow. An intake valve 31 is installed at the inlet end of the intake pipe 3, a circulation valve 41 is installed at the inlet end of the circulation pipe 4, and a recovery valve 61 is installed at the outlet end of the recovery pipe 6. The inlet end of the recovery pipe 6 is connected to the outlet of the housing 1 through the inlet end of the circulation pipe 4. An exhaust valve 51 is installed at the inlet end of the exhaust pipe 5, and a purification valve 9 is installed at the air inlet of the housing 1.

[0062] The detection assembly includes four sensors arranged from bottom to top: a first sensor 13, a second sensor 14, a third sensor 15, and a fourth sensor 16. The first sensor 13 and the second sensor 14 are located in the recycling detection area 1b as secondary sensors, while the second sensor 14, the third sensor 15, and the fourth sensor 16 are located in the purification detection area 1a as primary sensors. The purification detection area 1a and the recycling detection area 1b share the second sensor 14.

[0063] In the refrigerant purification method, the switching status of the devices corresponding to different steps is as follows:

[0064] Intake steps close open close open close open close close Purification steps open close close open close open close close Waste Discharge Steps close close close close open close open close Recycling steps open close open close close close close open

[0065] The working process of the refrigerant purification device is as follows:

[0066] Intake steps

[0067] like Figure 2 As shown, the circulation valve 41, recovery valve 61, and exhaust valve 51 are all closed, while the intake valve 31 and purification valve 9 are both open, and the vacuum pump 7 is turned on and running. In this way, the gas to be purified will be drawn into the refrigerant purification device, and the gas to be purified will be sprayed into many small bubbles through the diffuser 12 to fully mix and dissolve with the soluble refrigerant liquid 10.

[0068] Purification steps

[0069] like Figure 3 As shown, the inlet valve 31, recovery valve 61, and exhaust valve 51 are closed, while the circulation valve 41 and purification valve 9 are both open, and the vacuum pump 7 is started. In this way, the refrigerant gas to be purified will circulate in the refrigerant purification device. Vacuum pump 7 → purification valve 9 → diffuser 12 → soluble refrigerant liquid 10 → cooler 2 → circulation valve 41 → vacuum pump 7. Following this circulation path, the refrigerant gas to be purified is continuously dissolved and absorbed by the soluble refrigerant liquid 10. As long as any one of the second sensor 14 to the fourth sensor 16 can detect refrigerant molecules, the circulation continues until none of the second sensor 14 to the fourth sensor 16 can detect refrigerant molecules, which means that the separation is complete, and the waste discharge step is performed to discharge non-condensable gas.

[0070] Waste Discharge Steps

[0071] like Figure 4As shown, when the refrigerant gas separation is complete—when the second sensor 14 to the fourth sensor 16 cannot detect any refrigerant molecules—the circulation valve 41, the inlet valve 31, the recovery valve 61, and the purification valve 9 are all closed, the vacuum pump 7 stops operating, the exhaust valve 51 opens, and the exhaust pump 8 starts operating. In this way, the non-condensable air without refrigerant gas will be discharged from the refrigerant purification device under the action of the exhaust pump 8. The flow path of refrigerant gas molecules can be tracked according to the changes in the sensor detection signals. When the second sensor 14 to the fourth sensor 16 change from not detecting refrigerant gas molecules to gradually being able to detect refrigerant molecules, until the fourth sensor 16 detects refrigerant molecules, it indicates that there is refrigerant gas at the top of the shell 1, and the process of discharging non-condensable gas has been completed. The exhaust valve 51 and the exhaust pump 8 are then closed, and the recovery step is executed.

[0072] Recycling steps

[0073] like Figure 5 As shown, the intake valve 31, purification valve 9, and exhaust valve 51 are all closed, while the circulation valve 41 and recovery valve 61 are both open. The vacuum pump 7 starts running, and the heating device 11 is turned on to heat the system. In this way, the soluble refrigerant liquid 10 has relatively low solubility with the refrigerant at high temperatures, which allows it to quickly release the absorbed and dissolved refrigerant gas. Under the action of the vacuum pump 7, the relatively pure refrigerant gas is drawn back into the air conditioning unit to participate in the refrigeration cycle. When the first sensor 13 to the second sensor 14 no longer detect refrigerant gas molecules, it indicates that the refrigerant gas has been completely released. The heating device 11 and recovery valve 61 are then turned off to prepare for the next round of refrigerant purification cycle.

[0074] This process is repeated continuously to purify the refrigerant in the air conditioning unit, ensuring its performance.

[0075] It should be noted that the terminology used above is for describing specific embodiments only and is not intended to limit the exemplary embodiments according to this utility model. When the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The order of execution of actions, steps, etc., in the apparatus and methods shown in the specification and drawings can be implemented in any order unless a specific express order is specified, and as long as the output of the preceding process is not used in the subsequent process. Similar sequential terms used for ease of description do not imply that such an order must be followed.

[0076] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0077] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A refrigerant purification device, comprising: The housing, the cooler disposed within the housing, and the air inlet pipe connected to the housing are characterized in that they further include: a detection component for detecting refrigerant gas in different areas within the housing; the housing is also connected to a circulation pipe and an exhaust pipe; the circulation pipe sends the gas separated by the cooler back into the housing through a vacuum pump; and the exhaust pipe discharges the gas separated by the cooler to the outside through an exhaust pump. Both the circulation pipe and the exhaust pipe are equipped with valves, which are electrically connected to the detection component, and at most one of the circulation pipe and the exhaust pipe is connected.

2. The refrigerant purification device according to claim 1, characterized in that, The upper part inside the housing is a purification and detection area, which is provided with an air outlet. The inlet end of the circulation pipe and the inlet end of the exhaust pipe are both connected to the air outlet. The detection component includes at least two main sensors located at different heights in the purification detection area, with the normally functioning main sensor serving as the effective main sensor. The valve receives the detection signal from the effective main sensor, causing at most one of the circulation pipe and the exhaust pipe to be connected.

3. The refrigerant purification device according to claim 1, characterized in that, The bottom of the housing is provided with a liquid collection area, and the liquid collection area is provided with a heating device. The heating device is used to provide heat to release the refrigerant gas in the liquid collection area. The housing is also connected to a recovery pipe, and the recovery pipe supplies the refrigerant gas to the outside through the air pump. The recovery pipe is equipped with a recovery valve, and the recovery valve has the same on / off state as the heating device.

4. The refrigerant purification device according to claim 3, characterized in that, The housing is equipped with a recovery and detection area located above the liquid collection area; The detection assembly further includes at least two auxiliary sensors located at different heights in the recycling detection area, with the normally functioning auxiliary sensor serving as the effective auxiliary sensor. The recycling valve receives the detection signal from the effective auxiliary sensor and closes the recycling tube.

5. The refrigerant purification device according to claim 3, characterized in that, The liquid collection area is filled with soluble refrigerant liquid, and the liquid collection area is provided with an air inlet. The outlet end of the air inlet pipe and the outlet end of the circulation pipe are both connected to the air inlet.

6. The refrigerant purification apparatus according to claim 5, characterized in that, The housing is provided with a diffuser connected to the air inlet, and the diffuser has multiple diffusion holes for injecting gas outward.

7. The refrigerant purification apparatus according to any one of claims 1 to 6, characterized in that, The cooler includes: a cold plate, multiple layers of the cold plate are spaced apart and inclined within the housing to form a tortuous airflow channel, and gas within the housing flows upward along the tortuous airflow channel.

8. The refrigerant purification apparatus according to claim 7, characterized in that, Each layer of the cold plate has an upward arch in the middle and a downward slope at the edges, making the cold plate shape like an umbrella. In any two adjacent cold plates, one cold plate has openings on both sides to allow airflow, and the other cold plate has an opening in the middle to allow airflow.

9. The refrigerant purification apparatus according to claim 7, characterized in that, The cold plate has a cooling chamber inside for the flow of coolant.

10. An air conditioning unit, characterized in that, include: The refrigerant circulation loop and the refrigerant purification device according to any one of claims 1 to 9.

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