Refrigerant cleaning and recovery filling device

Abstract

The utility model belongs to the field of refrigerant cleaning and filling, disclose a kind of refrigerant cleaning recovery filling device, including high pressure pipe, low pressure pipe, new oil bottle, old oil bottle, first separator, vacuum pump, compressor, condenser and refrigerant storage tank;High pressure pipe is connected the first end of main pipe by first valve body, low pressure pipe is connected the first end of main pipe by second valve body, and the second end of main pipe is connected first separator;Fourth valve body and fifth valve body are connected in series between high pressure pipe and low pressure pipe;First separator is connected with condenser;Condenser is connected with refrigerant storage tank;New oil bottle is connected to the pipeline between fourth valve body and fifth valve body by eighth valve body, and the pipeline between fourth valve body and fifth valve body is also connected to refrigerant storage tank by ninth valve body.The application improves the flexibility of device filling new oil or refrigerant.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant cleaning and refueling, and in particular to a refrigerant cleaning, recovery and refueling device. Background Technology

[0002] The refrigeration system has become an important part of automobiles. The amount and purity of the refrigerant in the refrigeration system are key factors affecting the vehicle's cooling effect. The vehicle's refrigeration system needs to be inspected, cleaned, and refrigerant exchanged regularly. This work needs to be done with the help of refrigerant recovery and charging equipment.

[0003] The prior art discloses a refrigerant cleaning, recovery and refilling device, see Chinese Patent No. 202311604092.X. When adding new oil or refrigerant, it cannot separately fill the high-pressure pipe and the low-pressure pipe, which is not flexible enough and cannot meet the needs of users. Utility Model Content

[0004] The main purpose of this utility model is to provide a refrigerant cleaning, recovery and refilling device, which aims to solve the technical problem that it is impossible to add new oil or refrigerant to the high-pressure pipe and low-pressure pipe separately in the existing technology.

[0005] In order to achieve the above-mentioned utility model objectives, this utility model proposes a refrigerant cleaning, recovery and refilling device, including a high-pressure pipe, a low-pressure pipe, a new oil bottle, a first separator, a condenser and a refrigerant storage tank;

[0006] The high-pressure pipe is connected to the first end of the main pipe through the first valve body, the low-pressure pipe is connected to the first end of the main pipe through the second valve body, and the second end of the main pipe is connected to the first separator; a fourth valve body and a fifth valve body are connected in series between the high-pressure pipe and the low-pressure pipe;

[0007] The first separator is connected to the condenser;

[0008] The condenser is connected to the refrigerant storage tank;

[0009] The new oil bottle is connected to the pipeline between the fourth and fifth valve bodies via the eighth valve body, and the pipeline between the fourth and fifth valve bodies is also connected to the refrigerant storage tank via the ninth valve body.

[0010] Furthermore, the refrigerant cleaning, recovery, and refilling device also includes an old oil bottle, a vacuum pump, and a compressor. The first separator is also connected to the compressor and the old oil bottle respectively. The first separator and the old oil bottle are connected through a sixth valve body. The third end of the main pipe is connected to the vacuum pump through a third valve body.

[0011] Furthermore, a tenth valve body is provided on the main pipe near the second end.

[0012] Furthermore, a viewing window is provided on the main pipe.

[0013] Furthermore, the first separator and the compressor are connected via a filter dryer.

[0014] Furthermore, a first pressure sensor and / or a first pressure gauge are provided on the high-pressure pipe; a second pressure sensor and / or a second pressure gauge are provided on the low-pressure pipe.

[0015] Furthermore, the new oil bottle includes multiple sub-oil bottles, and the eighth valve body includes multiple sub-valve bodies;

[0016] Each of the sub-oil bottles is provided with a corresponding sub-valve body.

[0017] Furthermore, the refrigerant storage tank is provided with an exhaust pipe, and the exhaust pipe is provided with an eleventh valve body;

[0018] A third pressure sensor and / or a third pressure gauge are connected to a section of the exhaust pipe between the eleventh valve body and the refrigerant storage tank.

[0019] Furthermore, the refrigerant cleaning, recovery, and charging device also includes a second separator, and the compressor is connected to the second separator via a seventh valve body;

[0020] A first check valve is provided between the first separator and the second separator to restrict the flow of fluid from the first separator to the second separator.

[0021] Furthermore, a second check valve is provided between the fourth valve body and the high-pressure pipe to restrict the flow of fluid from the main pipe to the fourth valve body;

[0022] A third check valve is provided between the fifth valve body and the low-pressure pipe to restrict the flow of fluid from the main pipe to the fifth valve body.

[0023] Beneficial effects:

[0024] This utility model discloses a refrigerant cleaning, recovery, and refilling device. A high-pressure pipe is connected to the first end of a main pipe via a first valve body, and a low-pressure pipe is connected to the first end of the main pipe via a second valve body. The second end of the main pipe is connected to a first separator, which is connected to a condenser. The condenser is connected to a refrigerant storage tank. A fourth valve body and a fifth valve body are connected in series between the high-pressure and low-pressure pipes. A new oil bottle is connected to the pipeline between the fourth and fifth valve bodies via an eighth valve body. The pipeline between the fourth and fifth valve bodies is also connected to the refrigerant storage tank via a ninth valve body. This application can achieve various functions of existing refrigerant cleaning, recovery, and refilling devices, such as refrigerant recovery and new oil refilling, through the cooperation of the valve bodies. Based on this, since the high-pressure pipe and the low-pressure pipe in this application are connected in series with a fourth valve body and a fifth valve body, and the new oil bottle is connected to the pipeline between the fourth valve body and the fifth valve body through an eighth valve body, and the pipeline between the fourth valve body and the fifth valve body is connected to the refrigerant storage tank through a ninth valve body, when it is necessary to add new oil or refrigerant to the high-pressure pipe or the low-pressure pipe, different filling paths can be selected by controlling the opening and closing of the eighth valve body, the ninth valve body, the fourth valve body and the fifth valve body, so as to achieve precise filling of new oil or refrigerant, which greatly improves the flexibility and applicability of the device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the refrigerant cleaning, recovery, and refueling device according to an embodiment of the present invention;

[0026] Wherein: 11-High pressure pipe; 12-Low pressure pipe; 13-New oil bottle; 131-First sub-oil bottle; 132-Second sub-oil bottle; 133-Third sub-oil bottle; 14-Old oil bottle; 15-First separator; 16-Second separator; 17-Vacuum pump; 18-Compressor; 19-Condenser; 20-Refrigerant storage tank; 21-Filter dryer; 22-Main pipe; 23-Viewing window; 24-First pressure sensor; 25-First pressure gauge; 26-Second pressure sensor; 27-Second pressure gauge; 28-Third pressure sensor; 29-Third pressure gauge;

[0027] 101-First valve body; 102-Second valve body; 103-Third valve body; 104-Fourth valve body; 105-Fifth valve body; 106-Sixth valve body; 107-Seventh valve body; 108-Eighth valve body; 81-First sub-valve body; 82-Second sub-valve body; 83-Third sub-valve body; 109-Ninth valve body; 110-Tenth valve body; 111-Eleventh valve body; 112-First check valve 112; 113-Second check valve 113; 114-Third check valve 114.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Reference Figure 1This utility model discloses a refrigerant cleaning, recovery, and refueling device, comprising a high-pressure pipe 11, a low-pressure pipe 12, a new oil bottle 13, a first separator 15, a condenser 19, and a refrigerant storage tank 20. The high-pressure pipe 11 is connected to the first end of a main pipe 22 via a first valve body 101, and the low-pressure pipe 12 is connected to the first end of the main pipe 22 via a second valve body 102. The second end of the main pipe 22 is connected to the first separator 15. A fourth valve body 104 and a fifth valve body 105 are connected in series between the high-pressure pipe 11 and the low-pressure pipe 12. The first separator 15 is connected to the condenser 19; the condenser 19 is connected to the refrigerant storage tank 20. The new oil bottle 13 is connected to the pipeline between the fourth valve body 104 and the fifth valve body 105 via an eighth valve body 108, and the pipeline between the fourth valve body 104 and the fifth valve body 105 is also connected to the refrigerant storage tank 20 via a ninth valve body 109.

[0034] Furthermore, the refrigerant cleaning, recovery, and refueling device may also include a used oil bottle 14, a vacuum pump 17, and a compressor 18. The first separator 15 is also connected to the compressor 18 and the used oil bottle 14 respectively. The first separator 15 and the used oil bottle 14 are connected via a sixth valve body 106. The third end of the main pipe 22 is connected to the vacuum pump 17 via a third valve body 103. It can be understood that in this embodiment, the high-pressure pipe 11 is connected to the first end of the main pipe 22 via a first valve body 101, the low-pressure pipe 12 is connected to the first end of the main pipe 22 via a second valve body 102, the second end of the main pipe 22 is connected to the first separator 15, and the third end of the main pipe 22 is connected to the vacuum pump 17 via a third valve body 103. The first separator 15 is connected to the compressor 18, the condenser 19, and the used oil bottle 14 respectively. The first separator 15 and the used oil bottle 14 are connected via a sixth valve body 106. The condenser 19 is connected to the refrigerant storage tank 20. Connecting the high-pressure pipe 11 and the low-pressure pipe 12, a fourth valve body 104 and a fifth valve body 105 are connected in series. The new oil bottle 13 is connected to the pipeline between the fourth valve body 104 and the fifth valve body 105 through the eighth valve body 108. The pipeline between the fourth valve body 104 and the fifth valve body 105 is also connected to the refrigerant storage tank 20 through the ninth valve body 109. Therefore, this application can complete various functions of the refrigerant cleaning, recovery and refilling device in the prior art, such as refrigerant recovery, refilling new oil, vacuuming, forward cleaning, and reverse cleaning, through the cooperation between the valve bodies.

[0035] In the refrigeration system, the high-pressure pipe 11 is used to transport refrigerant in a high-pressure state, while the low-pressure pipe 12 is used to transport refrigerant in a low-pressure state. These two pipes are key channels connecting the automotive refrigeration system to the refrigerant cleaning, recovery, and charging device of this application. The main pipe 22 serves as the main pipeline for fluid transmission. Its first end is connected to the high-pressure pipe 11 and the low-pressure pipe 12 via a first valve body 101 and a second valve body 102, respectively, allowing fluids from the high-pressure pipe 11 and the low-pressure pipe 12 to flow into the main pipe 22. The second end of the main pipe 22 is connected to a first separator 15 for preliminary separation of the incoming refrigerant and oil; the third end is connected to a vacuum pump 17 via a third valve body 103 to expel air from the system in vacuum mode.

[0036] The fourth valve body 104 and the fifth valve body 105, connected in series between the high-pressure pipe 11 and the low-pressure pipe 12, constitute a bypass pipeline. By controlling the opening and closing of these two valve bodies, the flow direction of the fluid in the high-pressure pipe 11, the low-pressure pipe 12, and the bypass pipeline can be adjusted. The first separator 15 is the core component for oil-gas separation. The separated refrigerant is compressed by the compressor 18 and enters the subsequent processing flow, while the separated oil can be discharged into the old oil bottle 14 through the sixth valve body 106. The compressor 18 compresses and heats the refrigerant, increasing its pressure and temperature so that it can be condensed and liquefied in the condenser 19. The condensed refrigerant is stored in the refrigerant storage tank 20.

[0037] The new oil bottle 13 is connected to the pipeline between the fourth valve body 104 and the fifth valve body 105 via the eighth valve body 108, allowing new oil to be injected into the system at this location. Simultaneously, this pipeline is also connected to the refrigerant storage tank 20 via the ninth valve body 109, facilitating the injection of refrigerant from the storage tank into the system or its participation in the cleaning cycle. This structural design forms a flexible fluid control network, enabling multiple functions such as refrigerant recovery, new oil filling, and cleaning through the coordinated action of each valve.

[0038] In this embodiment, the piping connections and valve arrangement of the aforementioned refrigerant cleaning and recovery charging device solve the problem in the prior art that it is impossible to separately add new oil to the high-pressure pipe and the low-pressure pipe. When it is necessary to add new oil to the high-pressure pipe or the low-pressure pipe, different charging paths can be selected by controlling the opening and closing of the fourth valve body 104 and the fifth valve body 105 to achieve precise charging, which greatly improves the flexibility and applicability of the device. Specifically, when new oil needs to be injected, three refueling methods can be achieved through the cooperation of the eighth valve body 108, the fourth valve body 104, the fifth valve body 105, and the ninth valve body 109. For example: opening the eighth valve body 108, the fourth valve body 104, and the fifth valve body 105, and closing the ninth valve body 109, allows new oil to be injected into both the high-pressure pipe 11 and the low-pressure pipe 12 simultaneously; opening the eighth valve body 108 and the fourth valve body 104, and closing the fifth valve body 105 and the ninth valve body 109, allows new oil to be injected into the high-pressure pipe 11 alone; opening the eighth valve body 108 and the fifth valve body 105, and closing the fourth valve body 104 and the ninth valve body 109, allows new oil to be injected into the low-pressure pipe 12 alone; in the above three refueling methods, if refrigerant is required, the ninth valve body 109 can be opened.

[0039] Furthermore, the connection design between the main pipe 22 and the first separator 15 and vacuum pump 17 enables the system to efficiently achieve refrigerant recovery and vacuuming operations. The connection between the first separator 15 and the compressor 18, condenser 19, and used oil bottle 14 ensures smooth processes for refrigerant compression, condensation, and waste oil recovery. The connection between the new oil bottle 13 and the fourth valve body 104 and the fifth valve body 105, as well as the connection between this pipeline and the refrigerant storage tank 20, provides a convenient channel for adding new oil and refrigerant, enabling the entire device to meet various maintenance needs of automotive refrigeration systems and improving work efficiency.

[0040] In one embodiment, a tenth valve body 110 is provided on the main pipe 22 near the second end.

[0041] The tenth valve body 110 is located on the main pipe 22 near the second end, i.e., near the first separator 15. The function of this valve body is to control the flow of fluid between the main pipe 22 and the first separator 15. In different operating modes of the device, opening or closing the tenth valve body 110 adjusts whether fluid enters the first separator 15 for processing. For example, in refrigerant recovery mode, the tenth valve body 110 needs to be opened to allow refrigerant to enter the first separator 15 from the main pipe 22 for oil-gas separation; while in some modes where the first separator 15 is not needed, the tenth valve body 110 can be closed to block the passage.

[0042] In this embodiment, the tenth valve body 110 provides a convenient means of fluid control between the main pipe 22 and the first separator 15. During refrigerant recovery, opening the tenth valve body 110 ensures that the refrigerant smoothly enters the first separator 15 for separation, improving recovery efficiency. In vacuum mode or other situations where the first separator 15 is not required, closing the tenth valve body 110 prevents fluid from entering the first separator 15, reducing unnecessary energy consumption and process interference. Furthermore, the tenth valve body 110 can also isolate the first separator 15 by closing it during system maintenance or troubleshooting, facilitating the repair or replacement of this component and improving the maintainability and operational flexibility of the device.

[0043] In one embodiment, a viewing window 23 is provided on the main pipe 22. As the primary channel for fluid transport within the device, the state of the fluid inside the main pipe 22, such as flow rate, bubbles, and impurities, is crucial to the normal operation of the device. The viewing window 23, mounted on the main pipe 22, is typically made of a transparent material, such as glass or high-strength plastic, allowing operators to directly observe the fluid flow within the main pipe 22. Through the viewing window 23, it is possible to check whether the refrigerant is in a liquid or gaseous state, whether bubbles are present, and whether the fluid contains impurities. For example, during refrigerant recovery, observing the state of the fluid within the viewing window 23 can help determine if the recovery is proceeding smoothly.

[0044] In this embodiment, the viewing window 23 provides the operator with a direct window to observe the fluid state within the main pipe 22, which has significant practical value. During device operation, by observing the viewing window 23, problems such as abnormal fluid flow, excessive bubbles, and impurities can be detected in a timely manner, facilitating rapid action by the operator, such as cleaning the pipeline and adjusting the valve status, to prevent device malfunctions or impact on operational performance due to abnormal fluid conditions. Furthermore, the viewing window 23 can also be used to determine whether the refrigerant charge in the system is appropriate. For example, when adding refrigerant, when the bubbles in the viewing window 23 gradually decrease and tend to stabilize, it can serve as a reference point indicating that the charging is nearing completion, improving the accuracy and reliability of the operation.

[0045] In one embodiment, the first separator 15 and the compressor 18 are connected by a filter dryer 21.

[0046] The function of the first separator 15 is to separate the oil from the refrigerant. The separated refrigerant then enters the compressor 18 for compression. The filter dryer 21 is a device used to filter impurities and absorb moisture from the refrigerant, and it is installed on the pipeline between the first separator 15 and the compressor 18. As the refrigerant flows from the first separator 15 to the compressor 18, it first passes through the filter dryer 21. The filter screen removes solid impurities such as metal shavings and dust from the refrigerant, while the desiccant absorbs moisture. This ensures that the refrigerant entering the compressor 18 is clean and dry, preventing impurities and moisture from damaging the compressor 18.

[0047] In this embodiment, the filter dryer 21 effectively improves the quality of the refrigerant entering the compressor 18, thus protecting the compressor 18. Impurities entering the compressor 18 may cause wear and scratches on internal parts, affecting the compressor's service life and operating efficiency; the presence of moisture may cause freezing at low temperatures, clogging the pipeline. Through the filtering and drying action of the filter dryer 21, the purity and dryness of the refrigerant can be ensured, reducing the failure rate of the compressor 18 and extending its service life. At the same time, clean and dry refrigerant also helps improve the operating efficiency and stability of the entire refrigeration system, ensuring the smooth operation of refrigerant recovery, charging, and other operations.

[0048] In one embodiment, the high-pressure pipe 11 is provided with a first pressure sensor 24 and / or a first pressure gauge 25.

[0049] The high-pressure pipe 11 is used to transport refrigerant under high pressure, and its internal pressure is an important parameter reflecting the system's operating status. A first pressure sensor 24 and a first pressure gauge 25 are installed on the high-pressure pipe 11 to monitor the pressure within it. Specifically, the first pressure sensor 24 can be installed alone, or the first pressure gauge 25 can be installed alone, or both can be installed simultaneously. The first pressure sensor 24 converts the pressure signal into an electrical signal and transmits it to the control system, enabling real-time pressure monitoring and automatic control. The first pressure gauge 25 displays the pressure value within the high-pressure pipe 11 directly to the operator using a mechanical pointer or digital display. During operation, the operator can observe the output signal of the first pressure sensor 24 or the reading of the first pressure gauge 25 to determine if the pressure within the high-pressure pipe 11 is within the normal range, allowing for timely adjustments to the system's operating status.

[0050] In this embodiment, the installation of a pressure monitoring device on the high-pressure pipe 11 has significant safety and monitoring implications. Firstly, by monitoring the pressure within the high-pressure pipe 11 in real time, safety accidents such as pipe rupture and component damage caused by excessive system pressure can be prevented. When the pressure exceeds a set threshold, the control system can automatically take measures such as closing relevant valves and stopping the compressor to release pressure, ensuring the safety of the equipment and personnel. Secondly, pressure parameters are also important indicators of whether the system is operating normally. For example, during refrigerant recovery, pressure changes within the high-pressure pipe 11 can reflect the recovery progress and efficiency; during refrigerant charging, pressure changes can help operators determine whether charging is complete. Furthermore, the installation of pressure sensors and pressure gauges facilitates system debugging and maintenance by operators, improving the reliability and operability of the equipment.

[0051] In one embodiment, a second pressure sensor 26 and / or a second pressure gauge 27 are provided on the low-pressure pipe 12.

[0052] The low-pressure pipe 12 is used to transmit refrigerant in a low-pressure state, and its internal pressure is also a key parameter affecting system operation. A second pressure sensor 26 and a second pressure gauge 27 are installed on the low-pressure pipe 12, functioning similarly to the pressure monitoring device on the high-pressure pipe 11. Similarly, the second pressure sensor 26 can be installed alone on the low-pressure pipe 12, or the second pressure gauge 27 can be installed alone, or both can be installed simultaneously. The second pressure sensor 26 converts the pressure signal within the low-pressure pipe 12 into an electrical signal for analysis and processing by the control system; the second pressure gauge 27 displays the pressure value within the low-pressure pipe 12 in a visual manner. During operation, operators can monitor the pressure within the low-pressure pipe 12 in real time using these two devices, providing a basis for system operation control and fault diagnosis.

[0053] In this embodiment, by monitoring the pressure within the low-pressure pipe 12, it can be determined whether the suction pressure of the compressor 18 is normal and whether there are any problems such as leaks or blockages in the system. For example, if the pressure within the low-pressure pipe 12 is too low, it may mean that there is insufficient refrigerant or blockage in the system; if the pressure is too high, it may indicate that the compressor 18 is not suctioning properly or that the system is overloaded. Timely detection and handling of these abnormalities can prevent device malfunctions. In addition, the low-pressure parameter also plays an important role in the vacuuming mode, and can be used to determine whether the system vacuum level meets the requirements, ensuring the effectiveness of the vacuuming operation. Furthermore, the pressure monitoring device on the low-pressure pipe 12 works in conjunction with the device on the high-pressure pipe 11 to jointly ensure the safe and stable operation of the system. Specific applications can be designed according to the specific operating logic, and no specific limitations are made here. In summary, the first pressure sensor 24, the second pressure sensor 26, and the first pressure gauge 25 and the second pressure gauge 27 provide reliable pressure data support for the intelligent control and manual operation of the device, improving the working efficiency and stability of the device.

[0054] In one embodiment, the new oil bottle 13 includes a plurality of sub-oil bottles, and the eighth valve body 108 includes a plurality of sub-valve bodies; each of the sub-oil bottles is provided with one sub-valve body.

[0055] The new oil bottle 13 is used to store new oil to be added. In this embodiment, the new oil bottle 13 consists of multiple sub-oil bottles, such as the first sub-oil bottle 131, the second sub-oil bottle 132, and the third sub-oil bottle 133. Each sub-oil bottle is used to store different types of oil, such as UV (Ultraviolet) oil, POE (Polyol Ester) oil, and PAG (Polyalkylene Glycol) oil. The eighth valve body 108 correspondingly includes multiple sub-valve bodies, such as the first sub-valve body 81, the second sub-valve body 82, and the third sub-valve body 83. Each sub-valve body corresponds to one sub-oil bottle and controls the connection between that sub-oil bottle and the filling pipeline. When a certain type of oil needs to be added, the corresponding sub-valve body is opened, and new oil can be injected into the system from the corresponding sub-oil bottle through the pipeline connected to the eighth valve body 108. This design allows the device to adapt to the filling needs of different types of oil, improving the versatility of the device.

[0056] In this embodiment, the new oil bottle 13 adopts a combined design of multiple sub-oil bottles and sub-valve bodies, which has significant technical advantages. First, it overcomes the limitation of existing devices that can only add a single type of oil. It allows for the selection of different types of oil according to the different needs of the automotive refrigeration system, greatly expanding the applicability of the device. For example, different vehicle models' refrigeration systems may require different types of lubricating oil. With this design, operators can easily switch between adding different oils without replacing the entire oil bottle or making complex pipeline adjustments. Second, each sub-oil bottle has an independently equipped sub-valve body, enabling precise control of different oils, preventing mixing of different types of oils, and ensuring the purity and quality of the added oil. Furthermore, this design facilitates the management and monitoring of the usage of different oils. Operators can individually control the amount added to each sub-oil bottle according to actual needs, improving the flexibility and accuracy of the adding operation.

[0057] In one embodiment, the refrigerant storage tank 20 is provided with an exhaust pipe, and an eleventh valve body 111 is provided on the exhaust pipe; a third pressure sensor 28 and / or a third pressure gauge 29 are connected to a section of the exhaust pipe between the eleventh valve body 111 and the refrigerant storage tank 20.

[0058] The refrigerant storage tank 20 is used to store condensed liquid refrigerant. In certain situations, such as when the pressure inside the storage tank is too high or when it is necessary to vent air from the tank, venting is required through the vent pipe. The vent pipe is installed on the refrigerant storage tank 20, and the eleventh valve body 111 is installed on the vent pipe to control the opening and closing of the vent pipe. The third pressure sensor 28 and the third pressure gauge 29 are installed on the vent pipe between the eleventh valve body 111 and the refrigerant storage tank 20 to monitor the pressure inside the storage tank. When the pressure inside the storage tank is too high, the eleventh valve body 111 can be opened to release pressure, and at the same time, the pressure change is monitored in real time by the third pressure sensor 28 or the third pressure gauge 29 to ensure that the pressure release process is safe and controllable.

[0059] In this embodiment, the refrigerant storage tank 20 is equipped with an exhaust pipe, an eleventh valve body 111, and a pressure monitoring device, which play an important role in ensuring the safe operation of the storage tank and the normal operation of the system. First, the exhaust pipe and eleventh valve body 111 allow for timely pressure relief when the pressure inside the storage tank is too high, preventing damage due to excessive pressure and ensuring the safety of the device. Second, the third pressure sensor 28 and third pressure gauge 29 can monitor the pressure inside the storage tank in real time, providing operators with accurate pressure data to facilitate judgment of the storage tank's operating status and whether pressure relief is necessary. Similarly, the third pressure sensor 28 can be installed alone on the exhaust pipe, or the third pressure gauge 29 can be installed alone, or both can be installed simultaneously. Furthermore, during refrigerant charging or system cleaning, air or excess gas inside the storage tank can be discharged through the exhaust pipe, ensuring the purity of the refrigerant and the accuracy of the charging amount. This design improves the safety and reliability of the refrigerant storage tank 20 and also ensures the stable operation of the entire device. The third pressure sensor 28 is also connected to the control system, while the third pressure gauge 29 is used to facilitate on-site observation by operators.

[0060] In one embodiment, the refrigerant cleaning, recovery and charging device further includes a second separator 16, and the compressor 18 is connected to the second separator 16 via a seventh valve body 107; a first one-way valve 112 is provided between the first separator 15 and the second separator 16 to restrict the flow of fluid from the first separator 15 to the second separator 16.

[0061] The first separator 15 and the second separator 16 perform different separation functions in the device. The first separator 15 is mainly used to initially separate the oil and refrigerant in the refrigerant. The separated oil is recycled by the old oil bottle 14, while most of the separated refrigerant flows to the condenser 19, and a small portion of the refrigerant enters the compressor 18. When the seventh valve body 107 is opened, the oil separated by the second separator 16 flows back to the compressor 18 through the seventh valve body 107, while the refrigerant flows back to the first separator 15 through the first one-way valve 112.

[0062] In this embodiment, the second separator 16 is used to further separate the oil from the refrigerant discharged by the compressor 18. A first one-way valve 112 is installed in the pipeline between the first separator 15 and the second separator 16. Its function is to restrict fluid flow only from the second separator 16 to the first separator 15, while preventing fluid from flowing from the first separator 15 to the second separator 16. This unidirectional flow design ensures that the fluid flows along a predetermined path within the system, avoiding process disruption and component damage caused by reverse flow. When the compressor 18 is operating, the refrigerant enters the compressor 18 after being separated by the first separator 15. The compressed refrigerant then enters the second separator 16 for further separation. The separated refrigerant flows back from the second separator 16 to the first separator 15, improving the refrigerant recycling efficiency.

[0063] In one embodiment, a second check valve 113 is provided between the fourth valve body 104 and the high-pressure pipe 11 to restrict the flow of fluid from the main pipe 22 to the fourth valve body 104; a third check valve 114 is provided between the fifth valve body 105 and the low-pressure pipe 12 to restrict the flow of fluid from the main pipe 22 to the fifth valve body 105.

[0064] The fourth valve body 104 connects to the high-pressure pipe 11 and the bypass pipe, while the fifth valve body 105 connects to the low-pressure pipe 12 and the bypass pipe. A second check valve 113 is positioned between the fourth valve body 104 and the high-pressure pipe 11, allowing fluid to flow from the fourth valve body 104 to the high-pressure pipe 11, but preventing fluid from flowing from the main pipe 22 through the high-pressure pipe 11 to the fourth valve body 104. A third check valve 114 is positioned between the fifth valve body 105 and the low-pressure pipe 12, allowing fluid to flow from the fifth valve body 105 to the low-pressure pipe 12, but preventing fluid from flowing from the main pipe 22 through the low-pressure pipe 12 to the fifth valve body 105. This arrangement of check valves effectively prevents fluid from the high-pressure pipe 11 and the low-pressure pipe 12 from entering the new oil bottle 13.

[0065] In this embodiment, the second check valve 113 and the third check valve 114 further improve the accuracy and reliability of fluid control in the device. When adding new oil or refrigerant, by controlling the states of the fourth valve body 104, the fifth valve body 105, and the corresponding check valves, it can be ensured that the new oil or refrigerant is injected into the high-pressure pipe 11 or the low-pressure pipe 12 along the prescribed path, without backflow due to pressure in the main pipe 22, which would affect the filling effect. Furthermore, the check valves also provide protection when abnormal pressure fluctuations occur in the system, preventing fluid in the high-pressure pipe 11 or the low-pressure pipe 12 from flowing back into the bypass line, avoiding damage to related components, and improving the safety and stability of the device.

[0066] The aforementioned refrigerant cleaning, recovery, and refueling device can perform multiple modes of operation, as detailed below:

[0067] Refrigerant recovery mode: Open the first valve body 101, the second valve body 102, and the tenth valve body 110 to start the compressor 18, and then open the sixth valve body 106. In this mode, the refrigerant first enters the oil-gas separation chamber of the first separator 15 for oil-gas separation, then enters the oil separator of the compressor 18 to separate from the compressor oil, and then enters the high-temperature refrigerant receiving chamber to assist in heating the oil-gas separation chamber and improve the oil-gas separation efficiency. After being condensed by the condenser 19, it is recovered to the refrigerant storage tank 20. When the sixth valve body 106 is opened, the oil separated in the oil-gas separation chamber is recovered to the old oil bottle 14.

[0068] Vacuuming mode: Open the first valve body 101, the second valve body 102, and the third valve body 103, start the vacuum pump 17, and perform a vacuuming operation on the system to remove air and non-condensable gases from the system.

[0069] UV mode for adding new oil: Open the first sub-valve 81, the fifth valve 105, and the fourth valve 104 to add UV type new oil to the system from the first sub-oil bottle 131.

[0070] Adding new oil in POE mode: Open the second sub-valve 82, the fifth valve 105, and the fourth valve 104 to add POE type new oil to the system from the second sub-oil bottle 132.

[0071] New oil filling PAG mode: Open the first sub-valve body 81, the fifth valve body 105, and the fourth valve body 104 to add PAG type new oil to the system from the first sub-oil bottle 131.

[0072] Refrigerant charging mode: Open the ninth valve body 109, the fifth valve body 105, and the fourth valve body 104 to add the refrigerant from the refrigerant storage tank 20 into the system.

[0073] Forward cleaning mode: Compressor 18 is normally open. First, the second valve body 102, the first valve body 101, and the tenth valve body 110 are opened to recover refrigerant. Then, the second valve body 102, the first valve body 101, and the tenth valve body 110 are closed, and the ninth valve body 109, the fifth valve body 105, and the fourth valve body 104 are opened to add refrigerant. Then, the ninth valve body 109, the fifth valve body 105, and the fourth valve body 104 are closed, and the ninth valve body 109, the fifth valve body 105, the tenth valve body 110, and the first valve body 101 are opened to perform forward cleaning, so that the refrigerant circulates and cleans the system along the forward path.

[0074] Reverse cleaning mode: Compressor 18 is normally open. First, the second valve body 102, the first valve body 101, and the tenth valve body 110 are opened to recover refrigerant. Then, the second valve body 102, the first valve body 101, and the tenth valve body 110 are closed, and the ninth valve body 109, the fifth valve body 105, and the fourth valve body 104 are opened to add refrigerant. Then, the ninth valve body 109, the fifth valve body 105, and the fourth valve body 104 are closed, and the ninth valve body 109, the fourth valve body 104, the tenth valve body 110, and the second valve body 102 are opened to perform reverse cleaning, so that the refrigerant circulates and cleans the system in reverse.

[0075] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A refrigerant cleaning, recovery, and refueling device, comprising a high-pressure pipe, a low-pressure pipe, a new oil bottle, a first separator, a condenser, and a refrigerant storage tank, characterized in that: The high-pressure pipe is connected to the first end of the main pipe through the first valve body, the low-pressure pipe is connected to the first end of the main pipe through the second valve body, and the second end of the main pipe is connected to the first separator; a fourth valve body and a fifth valve body are connected in series between the high-pressure pipe and the low-pressure pipe; The first separator is connected to the condenser; The condenser is connected to the refrigerant storage tank; The new oil bottle is connected to the pipeline between the fourth and fifth valve bodies via the eighth valve body, and the pipeline between the fourth and fifth valve bodies is also connected to the refrigerant storage tank via the ninth valve body.

2. The refrigerant cleaning, recovery, and charging device according to claim 1, characterized in that, The refrigerant cleaning, recovery and refilling device also includes an old oil bottle, a vacuum pump and a compressor. The first separator is also connected to the compressor and the old oil bottle respectively. The first separator and the old oil bottle are connected through a sixth valve body. The third end of the main pipe is connected to the vacuum pump through a third valve body.

3. The refrigerant cleaning, recovery, and charging device according to claim 1 or 2, characterized in that, A tenth valve body is provided on the main pipe near the second end.

4. The refrigerant cleaning, recovery, and charging device according to claim 1 or 2, characterized in that, A viewing window is provided on the main pipe.

5. The refrigerant cleaning, recovery, and charging device according to claim 2, characterized in that, The first separator and the compressor are connected by a filter dryer.

6. The refrigerant cleaning, recovery, and charging device according to claim 1 or 2, characterized in that, The high-pressure pipe is equipped with a first pressure sensor and / or a first pressure gauge; the low-pressure pipe is equipped with a second pressure sensor and / or a second pressure gauge.

7. The refrigerant cleaning, recovery, and charging device according to claim 1 or 2, characterized in that, The new oil bottle includes multiple sub-oil bottles, and the eighth valve body includes multiple sub-valve bodies; Each of the sub-oil bottles is provided with a corresponding sub-valve body.

8. The refrigerant cleaning, recovery, and charging device according to claim 1 or 2, characterized in that, The refrigerant storage tank is equipped with an exhaust pipe, and the exhaust pipe is equipped with an eleventh valve body; A third pressure sensor and / or a third pressure gauge are connected to a section of the exhaust pipe between the eleventh valve body and the refrigerant storage tank.

9. The refrigerant cleaning, recovery, and charging device according to claim 2, characterized in that, It also includes a second separator, and the compressor is connected to the second separator via a seventh valve body; A first check valve is provided between the first separator and the second separator to restrict the flow of fluid from the first separator to the second separator.

10. The refrigerant cleaning, recovery, and refueling device according to claim 1 or 2, characterized in that, A second check valve is provided between the fourth valve body and the high-pressure pipe to restrict the flow of fluid from the main pipe to the fourth valve body; A third check valve is provided between the fifth valve body and the low-pressure pipe to restrict the flow of fluid from the main pipe to the fifth valve body.

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