Manual oiling tool

Abstract

The utility model relates to the technical field of automobile air conditioner maintenance, and discloses a manual refueling tool which comprises an oil bottle, a pressure adjusting mechanism and a quick connection mechanism are arranged on the oil bottle, the pressure adjusting mechanism is communicated with the quick connection mechanism through an oil outlet mechanism, the pressure adjusting mechanism comprises a manual inflator and a first hose, and the first hose is communicated with the pressure adjusting mechanism. One end of the first hose extends into the oil bottle, the other end of the first hose is communicated with the oil outlet mechanism, and the manual inflator is communicated with the oil bottle. The refrigerant oil filling device has the advantages that refrigerant oil can be quantitatively filled, and the filling process is accurate and stable.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning maintenance technology, and in particular to a manual refueling tool. Background Technology

[0002] During the operation of a car's air conditioning system, the refrigeration oil is gradually consumed as the refrigerant circulates. An appropriate amount of refrigeration oil can ensure good lubrication of various moving parts, reduce wear, and also play a role in sealing and cooling.

[0003] A Chinese invention patent with authorization announcement number CN119222479A discloses a filling tank for automotive air conditioning refrigerant oil, including a tank body, a supporting shell, a sealing cap, a buckle, an upper protective cap, and a quick-connect mechanism. The tank body is embedded in the supporting shell, the buckle is embedded in the upper port of the tank body, the buckle and the supporting shell clamp the tank body and the outer side of the buckle is fastened to the upper end of the supporting shell, the inner side of the buckle is threadedly connected to the sealing cap, the sealing cap has a horizontally set liquid outlet end that communicates with the tank body, the liquid outlet end is threadedly connected to a sleeve, and the upper protective cap is snapped onto the sealing cap.

[0004] However, the traditional method of adding refrigeration oil cannot provide a precise amount of oil. If there is too little refrigeration oil, there will be insufficient lubrication and accelerated wear of parts. If there is too much refrigeration oil, it will occupy the space of the refrigerant, reducing the amount of refrigerant charged and resulting in poorer cooling performance. Utility Model Content

[0005] The purpose of this invention is to provide a manual refueling tool that can quantitatively add refrigeration oil with a precise and stable filling process.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a manual refueling tool, including an oil bottle, the oil bottle being provided with a pressure regulating mechanism and a quick-connect mechanism, the pressure regulating mechanism and the quick-connect mechanism being connected through an oil dispensing mechanism, the pressure regulating mechanism including a manual air pump and a hose, one end of the hose extending into the interior of the oil bottle and the other end being connected to the oil dispensing mechanism, the manual air pump being connected to the oil bottle.

[0007] By adopting the above technical solution, the pressure generated by the manual air pump is transmitted to the oil bottle through the connecting pipeline, forming a stable squeezing force in the sealed oil bottle space, forcing the refrigeration oil to flow out from the hose submerged in the bottle. The refrigeration oil is then connected to the car air conditioning system through the oil outlet mechanism and quick-connect mechanism, and the directional delivery and precise filling of the refrigeration oil are achieved by using the pressure difference.

[0008] A further feature of this invention is that the oil dispensing mechanism includes a second hose and a third hose, one end of the second hose is connected to the first hose, the other end of the third hose is connected to the third hose, and the other end of the third hose is connected to the quick-connect mechanism.

[0009] By adopting the above technical solution, the oil outlet mechanism constructs a continuous transmission channel through hose two and hose three to achieve orderly delivery of refrigeration oil.

[0010] A further feature of this invention is that the quick-connect mechanism includes a high-voltage quick-connect and a low-voltage quick-connect.

[0011] By adopting the above technical solution, the quick-connect mechanism utilizes the pressure difference between the automotive air conditioning system and the refueling tool to allow the refrigerant oil to flow into the system under pressure. In addition, the high and low pressure quick-connect interfaces are designed to match the high and low pressure pipelines of the automotive air conditioning system, ensuring a tight connection and preventing leakage during refueling. This results in simple operation and high accuracy.

[0012] A further feature of this invention is that the three hoses are configured as two hoses, and the ends of the two hoses are respectively connected to the high-pressure quick connector and the low-pressure quick connector.

[0013] By adopting the above technical solution, the quick-connect mechanism uses a dual-interface design with both high-pressure and low-pressure quick-connect, and is equipped with two flexible hoses to achieve precise adaptation of the high and low pressure pipelines of the automotive air conditioning system.

[0014] A further feature of this invention is that the two hoses, the third and the second, are connected by a three-way valve.

[0015] By adopting the above technical solution, the three-way valve achieves efficient distribution of refrigeration oil through its unique flow-dividing structure.

[0016] A further feature of this invention is that a one-way valve is provided on the second flexible hose.

[0017] By adopting the above technical solution, when the manual air pump stops pressurizing or the pressure drops suddenly, the one-way valve can prevent the refrigeration oil from flowing back into the oil bottle, ensuring the stability of the filling system pressure and the one-way transmission direction of the refrigeration oil.

[0018] A further feature of this invention is that the top of the oil bottle is provided with an oil filling port, and the oil filling port is provided with an oil filling port cap.

[0019] By adopting the above technical solution, the filling port at the top of the oil bottle serves as the refueling inlet for refrigeration oil, working in conjunction with the filling port cap to achieve the dual functions of safe filling and sealed storage.

[0020] A further feature of this invention is that the oil bottle is engraved with a filling volume scale.

[0021] By adopting the above technical solution, the transparent oil bottle allows for intuitive observation of the oil level, and the filling scale enables quantitative filling. In addition, the oil volume changes are monitored in real time during the filling process to prevent overfilling or underfilling.

[0022] A further feature of this invention is that the quick-connect mechanism is connected to the automotive air conditioning system.

[0023] By adopting the above technical solution, the refrigerant oil flows into the air conditioning system quickly and stably through the transmission path of hose, three-way valve and quick-connect mechanism under the pressure difference.

[0024] The beneficial effects of this utility model are:

[0025] 1. The pressure generated by the manual air pump is transmitted to the oil bottle through the connecting pipe, forming a stable squeezing force in the sealed oil bottle space, forcing the refrigeration oil to flow out from the hose submerged in the bottle. The refrigeration oil is connected to the car air conditioning system through the oil outlet mechanism and quick-connect mechanism, and the directional delivery and precise filling of refrigeration oil is achieved by using the pressure difference.

[0026] 2. The transparent oil bottle allows for direct observation of the oil level, and the filling scale enables quantitative filling. In addition, the oil level is monitored in real time during the filling process to prevent overfilling or underfilling.

[0027] 3. The quick-connect mechanism utilizes the pressure difference between the car's air conditioning system and the refueling tool to allow the refrigerant oil to flow into the system under pressure. In addition, the high and low pressure quick-connect interfaces are designed to match the high and low pressure lines of the car's air conditioning system, ensuring a tight connection and preventing leakage during refueling. It features simple operation and high accuracy.

[0028] 4. The quick-connect mechanism adopts a dual-interface design with both high-pressure and low-pressure quick-connect, and together with two flexible hoses, it can achieve precise adaptation to the high and low pressure pipelines of the automotive air conditioning system.

[0029] 5. When the manual air pump stops pressurizing or the pressure drops suddenly, the one-way valve can prevent the refrigeration oil from flowing back into the oil bottle, ensuring the stability of the filling system pressure and the one-way transmission direction of the refrigeration oil. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional schematic diagram of a manual refueling tool according to this utility model.

[0032] Figure 2 This is a cross-sectional view of an oil bottle.

[0033] Figure 3 This is a three-dimensional schematic diagram of the oil dispensing mechanism.

[0034] In the diagram: 1. Oil bottle; 2. Manual air pump; 3. Hose 1; 4. Hose 2; 5. Hose 3; 6. High-pressure quick connector; 7. Low-pressure quick connector; 8. Three-way valve; 9. One-way valve; 10. Filler neck; 11. Filler neck cap; 12. Filling volume scale. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] like Figure 1 , 2 As shown in Figure 3, a manual refueling tool includes an oil bottle 1. The oil bottle 1 is equipped with a pressure regulating mechanism and a quick-connect mechanism. The pressure regulating mechanism and the quick-connect mechanism are connected via an oil dispensing mechanism. The pressure regulating mechanism includes a manual air pump 2 and a hose 3. One end of the hose 3 extends into the oil bottle 1, and the other end is connected to the oil dispensing mechanism. The manual air pump 2 is connected to the oil bottle 1. Specifically, operating the handle of the manual air pump 2 in a reciprocating motion generates pressure that is transmitted to the sealed oil bottle 1 via a connecting pipe. The stable squeezing force pushes coolant out of the hose 3, which then flows through the oil dispensing mechanism and the quick-connect mechanism to the car's air conditioning system. The manual air pump 2 can precisely control the pressure, ensuring a precise and stable refueling process.

[0037] The oil dispensing mechanism includes hose 2 (4) and hose 3 (5). One end of hose 2 (4) is connected to hose 1 (3), and the other end is connected to hose 3 (5). The other end of hose 3 (5) is connected to a quick-connect mechanism, which includes a high-pressure quick-connect (6) and a low-pressure quick-connect (7). There are two hoses 3 (5), with their ends connected to the high-pressure quick-connect (6) and low-pressure quick-connect (7) respectively. The two hoses 3 (5) are connected to hose 2 (4) via a three-way valve (8). Specifically, hose 3 (5) is flanged to the quick-connect mechanism, and the two hoses 3 (5) are flanged to hose 2 (4). Under pressure, refrigerant oil flows from hose 1 (3) into hose 2 (4), and then from hose 2 (4) into the three-way valve (8). Utilizing the flow-diverting characteristic of the three-way valve (8), the oil is distributed to the two hoses 3 (5). One path of refrigerant oil flows through hose 3 (5) to the high-pressure quick-connect (6), while the other path is guided through hose 3 (5) to the low-pressure quick-connect (7), ensuring that the high and low pressure pipelines simultaneously complete the efficient delivery and precise filling of refrigerant oil.

[0038] A one-way valve 9 is installed on hose 2 4. Specifically, the one-way valve 9 is directly installed in the middle section of hose 2 4 via a quick-connect connection. When the manual air pump 2 stops pressurizing or the pressure drops suddenly, the pressure in hose 2 4 decreases accordingly. The valve core of the one-way valve 9 closes quickly under the force of its own return spring or the reverse pressure of the refrigeration oil, cutting off the flow path of hose 2 4 and effectively preventing the refrigeration oil from flowing back to the oil bottle 1.

[0039] The oil bottle 1 has a filling port 10 at the top, and a filling port cap 11 is provided on the filling port 10. Specifically, the oil bottle 1 has a filling port 10 at the top, and the filling port cap 11 is snap-fitted to the oil bottle 1. That is, the filling port cap 11 is snap-fitted to the filling port 10. When the filling port cap 11 is opened, the refrigeration oil is added into the oil bottle 1. After the filling is completed, the filling port cap 11 is reset and tightly fastened to form a sealed structure.

[0040] The oil bottle 1 is marked with a filling volume scale 12. Specifically, during the filling process, the oil level is observed through the transparent oil bottle 1 to ensure that the oil is filled to the correct volume.

[0041] The quick-connect mechanism connects to the car's air conditioning system. Specifically, the car's air conditioning system is first evacuated to create a negative pressure environment. The quick-connect mechanism is then used to seal the refueling tool to the high and low pressure interfaces of the air conditioning system, allowing the refrigerant to flow precisely into the car's air conditioning system.

[0042] The working process of this manual refueling tool is as follows:

[0043] S1. Open the filler cap 11 and add refrigeration oil into the oil bottle 1 to the specified mark. After filling, reset the filler cap 11 and fasten it tightly.

[0044] S2. Then, first evacuate the car's air conditioning system, and then connect the manual oiling tool to the high and low pressure interfaces of the car's air conditioning system using quick-connect couplings.

[0045] S3. Next, use the manual air pump 2 to pressurize and squeeze the refrigeration oil from the hose 3 in the oil bottle 1 into the hose 4, and then from the hose 4 into the three-way valve 8. Using the flow-dividing characteristics of the three-way valve 8, the oil is distributed to the two hoses 5. One path of refrigeration oil flows through the hose 5 to the high-pressure quick connector 6, while the other path is guided through the hose 5 to the low-pressure quick connector 7, and then flows into the car's air conditioning system through the high and low pressure interfaces.

[0046] S4. After a certain amount of refrigerant oil is added to the car's air conditioning system, the manual air pump 2 stops pumping and pressurizing, and the one-way valve 9 installed on the hose 2 4 can effectively prevent the refrigerant oil from flowing back to the oil bottle 1.

Claims

1. A manual refueling tool, comprising an oil bottle (1), characterized in that: The oil bottle (1) is provided with a pressure regulating mechanism and a quick-connect mechanism. The pressure regulating mechanism and the quick-connect mechanism are connected through an oil dispensing mechanism. The pressure regulating mechanism includes a manual air pump (2) and a hose (3). One end of the hose (3) extends into the oil bottle (1) and the other end is connected to the oil dispensing mechanism. The manual air pump (2) is connected to the oil bottle (1).

2. The manual refueling tool according to claim 1, characterized in that: The oil dispensing mechanism includes a second hose (4) and a third hose (5). One end of the second hose (4) is connected to the first hose (3), and the other end is connected to the third hose (5). The other end of the third hose (5) is connected to the quick-connect mechanism.

3. The manual refueling tool according to claim 2, characterized in that: The quick-connect mechanism includes a high-voltage quick-connect (6) and a low-voltage quick-connect (7).

4. A manual refueling tool according to claim 3, characterized in that: The three hoses (5) are configured as two hoses, and the ends of the two hoses (5) are respectively connected to the high-pressure quick connector (6) and the low-pressure quick connector (7).

5. A manual refueling tool according to claim 4, characterized in that: The two hoses, three (5) and two (4), are connected by a three-way valve (8).

6. A manual refueling tool according to claim 2, characterized in that: A one-way valve (9) is provided on the second hose (4).

7. A manual refueling tool according to claim 1, characterized in that: The oil bottle (1) is provided with a filling port (10) at the top, and the filling port (10) is provided with a filling port cap (11).

8. A manual refueling tool according to claim 1, characterized in that: The oil bottle (1) is engraved with filling volume markings (12).

9. A manual refueling tool according to claim 1, characterized in that: The quick-connect mechanism is connected to the vehicle's air conditioning system.

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