Portable automobile air conditioner refrigerant adding device

Abstract

A portable automobile air conditioner refrigerant adding device comprises a filling head, a connecting hose, a pressure gauge and an adaptive connector. The filling head is connected with a refrigerant outlet for filling refrigerants in a sealed mode, and the filling head comprises an automatic pressing reset type sealing valve and a bevel pipe connected with a valve element of the automatic pressing reset type sealing valve. The bevel pipe is connected with the connecting hose in an inserted mode, and the connecting hose comprises a first connecting hose body and a second connecting hose body. The filling head is connected with the pressure gauge through the first connecting hose, the pressure gauge is connected with the adaptive connector through the second connecting hose, and the adaptive connector is connected with a low-pressure port of the automobile air conditioner, so that filling operation and connecting operation can be conveniently realized, the sealing performance is good, and filling of refrigerant of the automobile air conditioner can be accurately controlled; and meanwhile, a leakage detection function is also realized.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning refrigerants, and in particular, to a portable automotive air conditioning refrigerant adding device. Background Technology

[0002] Refrigerant is the working medium of a car's air conditioning system. It absorbs heat through compression and expansion, and evaporation, thereby producing a cooling effect. Unlike general household or commercial air conditioners, car air conditioners use semi-hermetic compressors, and the operating environment is much more complex and harsh. High temperatures, oil, gas, and water contamination, as well as bumps and vibrations, can all lead to refrigerant leaks and contamination. Therefore, refrigerant refilling is an important service for every repair shop during the summer.

[0003] Some portable refrigerant canisters exist, allowing drivers to manually add refrigerant to the air conditioning system. Traditional refrigerant adding tools involve puncturing the refrigerant canister's outlet with a needle, allowing the refrigerant to flow from the canister into the vehicle's air conditioning system. However, the canister's seal, for sealing purposes, typically requires iron or other metals with sufficient strength, rigidity, and hardness. Therefore, the needle requires high-quality materials. Furthermore, once the seal of a traditional refrigerant canister is punctured, it cannot effectively seal, causing remaining refrigerant to leak into the air, resulting in refrigerant waste and air pollution.

[0004] For example, Chinese Utility Model Patent Publication CN216742877U discloses a novel refrigerant tank injection valve, which includes a refrigerant tank and a valve body. A disc-shaped locking nut is fixedly connected to the outer surface of the valve body, a valve cap is fixedly connected to the upper surface of the valve body, a threaded joint is fixedly connected to one side surface of the valve cap, a valve stem sleeve is fixedly connected to the upper end of the valve cap, a valve stem is threadedly connected to the valve stem sleeve, a disc-shaped handle is fixedly connected to the upper end of the valve stem, a needle valve is fixedly connected to the lower end of the valve stem, a sealing ring base plate is connected to the lower end of the needle valve, a first sealing ring is fixedly connected to the lower surface of the sealing ring base plate, a second sealing ring is fixedly connected to the surface of the needle valve, and a sealing cavity is provided inside the valve body.

[0005] For example, Chinese utility model patent authorization announcement CN211903394U discloses an automotive air conditioning refrigerant charging device, including a storage tank, a control valve, a flow pipe, and a working cylinder. The storage tank is fitted with a buffer sleeve on its outer wall, and a wear-resistant sleeve is fitted outside the buffer sleeve. A locking cap is provided on the top of the wear-resistant sleeve. A control valve is provided on the top of the storage tank. The flow pipe is connected to the right side of the control valve. A flow meter is provided on the flow pipe. A pipe connector is provided at the end of the flow pipe. A working cylinder is provided on the flow pipe. A one-way valve is provided on the left side of the inner cavity of the working cylinder, and a filter screen is provided on the right side of the inner cavity of the working cylinder.

[0006] The aforementioned automotive air conditioning refrigerant charging device has a complex injection valve structure, is inconvenient to operate, and cannot accurately control the injection of refrigerant.

[0007] However, there is an urgent need in the existing technology for a portable automotive air conditioning refrigerant charging device that is compatible with injection valves of any structure, is easy to operate, and can accurately control the amount of refrigerant injected. Utility Model Content

[0008] The purpose of this utility model is to provide a portable automotive air conditioning refrigerant adding device to address the aforementioned problems. This device facilitates adding and connecting the refrigerant, has good sealing properties, can accurately control the injection of automotive air conditioning refrigerant, and also has a leak detection function.

[0009] A portable automotive air conditioning refrigerant charging device is characterized by comprising a charging head, a connecting hose, a pressure gauge, and an adapter connector. The charging head is sealed to the refrigerant outlet. The charging head has an automatic press-and-reset sealing valve and a bend tube connected to the valve core of the automatic press-and-reset sealing valve. The automatic press-and-reset sealing valve includes an automatic press-and-reset knob and a valve body. By releasing the automatic press-and-reset knob, the automatic press-and-reset sealing valve is sealed to the outlet, allowing the refrigerant to enter the bend tube through the valve core. The bend tube is connected to the connecting hose via a plug-in connection. The connecting hose includes a first connecting hose and a second connecting hose. The charging head is connected to the pressure gauge via the first connecting hose, and the pressure gauge is connected to the adapter connector via the second connecting hose. The adapter connector is connected to the low-pressure port of the automotive air conditioning system to perform the refrigerant charging operation.

[0010] The portable automotive air conditioning refrigerant adding device described above is characterized in that the filling head and the outlet are sealed by a snap-fit ​​connection.

[0011] The portable automotive air conditioning refrigerant charging device described above is characterized in that the automatic press-reset knob of the automatic press-reset sealing valve is a commercially available knob that can automatically rotate to apply pressure and reset, and the automatic press-reset knob is rotatably mounted on the top of the main body of the automatic press-reset sealing valve.

[0012] The portable automotive air conditioning refrigerant adding device described above is characterized in that the filling head further includes a protective cap for protecting the filling head, and / or an O-ring and an O-ring gasket for sealing with the outlet.

[0013] The portable automotive air conditioning refrigerant charging device described above is characterized in that the protective cover is detachably mounted on the charging head.

[0014] The portable automotive air conditioning refrigerant adding device described above is characterized in that the automatic press-reset sealing valve and the angle tube are integrally injection molded structures.

[0015] The portable automotive air conditioning refrigerant adding device described above is characterized in that the automatic press-reset sealing valve and the angle tube are separate molding structures.

[0016] The portable automotive air conditioning refrigerant adding device described above is characterized in that the valve core of the automatic press-reset sealing valve and the angled tube are connected by threads.

[0017] The portable automotive air conditioning refrigerant adding device described above is characterized in that the valve core of the automatic press-reset sealing valve and the angled tube are connected by a snap-fit ​​mechanism.

[0018] The portable automotive air conditioning refrigerant adding device described above is characterized in that the pressure gauge is a passive pressure gauge.

[0019] The portable automotive air conditioning refrigerant adding device described above is characterized in that the pressure gauge is a mechanical pressure gauge.

[0020] The portable automotive air conditioning refrigerant adding device described above is characterized in that the pressure gauge is an active pressure gauge, and a dry cell battery or lithium battery is used as the power source.

[0021] The portable automotive air conditioning refrigerant adding device described above is characterized by using an aerosol to replace the automotive air conditioning refrigerant for adding the aerosol.

[0022] The portable automotive air conditioning refrigerant adding device described above is characterized in that the aerosol is tire sealant, used for adding tire sealant.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) By simply sealing the charging head and the adapter connector of this utility model to the outlet of the canned refrigerant and the low-pressure port of the air conditioner, the refrigerant can be added automatically and easily. The charging head has good sealing performance, so even if the refrigerant is not completely used up, it will not leak and will not cause environmental pollution.

[0025] (2) The adapter connector is easy to connect to the low-pressure port pipe of the car air conditioner and has good sealing performance;

[0026] (3) The pressure gauge can not only detect the amount of refrigerant injected, but also intuitively perform the charging action according to the pressure gauge display, avoiding insufficient charging to achieve the desired effect or excessive charging to cause waste. It can also detect whether there is a leak in the entire pipeline.

[0027] (4) Due to the simple connection structure, there is no need to use a special valve for refrigerant or drill holes. It can be achieved by using an ordinary aerosol valve, which is inexpensive, simple and practical. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a portable automotive air conditioning refrigerant adding device according to this utility model;

[0029] Figure 2 yes Figure 1 The diagram shows the connection relationship between the hose and pressure gauge in the portable automotive air conditioning refrigerant charging device.

[0030] Figure 3 yes Figure 1 The diagram shows the adapter connector to the angle tube structure in the portable automotive air conditioning refrigerant charging device.

[0031] Reference numerals: 1- Filling head; 11- Automatic press-to-reset sealing valve; 12- Valve core; 13- Angle tube; 14- Automatic press-to-reset knob; 15- Sealing valve body; 2- Connecting hose; 21- First connecting hose; 22- Second connecting hose; 3- Pressure gauge; 4- Adapter connector; 5- Dispensing port; 6- Protective cap. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art will understand that this description is exemplary and that the present utility model is not limited to these specific embodiments.

[0033] Figure 1 A schematic diagram of a portable automotive air conditioning refrigerant adding device according to a specific embodiment of the present invention is shown. Figure 2 yes Figure 1 A schematic diagram showing the connection relationship between the hose and the pressure gauge in the diagram; Figure 3 yes Figure 1 A schematic diagram of the adapter connector to the angle tube structure. (See attached diagram.) Figure 1-3As shown, the portable automotive air conditioning refrigerant charging device of this utility model includes a charging head 1, a connecting hose 2, a pressure gauge 3, and an adapter connector 4; the charging head 1 is sealed to the refrigerant outlet 5, and the charging head includes an automatic press-to-reset sealing valve 11 and a bend tube 13 connected to the valve core 12 of the automatic press-to-reset sealing valve; the automatic press-to-reset sealing valve 11 includes an automatic press-to-reset knob 14 and a sealing valve body 15, which is activated by releasing the automatic press-to-reset knob 14 (when the packaging is torn off). The release paper releases the seal between the sealing valve body 15 and the outlet 5, allowing the refrigerant to enter the angle tube 13 through the valve core 12. The angle tube 13 is connected to the connecting hose 2 via a plug-in connection. The connecting hose 2 includes a first connecting hose 21 and a second connecting hose 22. The charging head 1 is connected to the pressure gauge 3 via the first connecting hose 21, and the pressure gauge 3 is connected to the adapter connector 4 via the second connecting hose 21. The adapter connector 4 is connected to the low-pressure port of the car air conditioner, enabling automatic charging and shut-off of the car air conditioner.

[0034] In a preferred embodiment, the dispensing head 1 further includes a protective cap 6, an O-ring (not shown), and an O-ring gasket (not shown). The protective cap 6 protects the dispensing head from impact damage when not in use. The gasket and O-ring provide a cushioned seal when the dispensing head 1 and the outlet of the refrigerant tank are removably installed. The protective cap is removably installed on the dispensing head.

[0035] In a preferred embodiment, the automatic press-reset sealing valve 11 and the angle tube 13 are integrally injection molded structures.

[0036] In another preferred embodiment, the automatic press-to-reset sealing valve 11 and the angle tube 13 are separate molding structures. More preferably, the valve core 12 of the automatic press-to-reset sealing valve 11 and the angle tube 13 are connected by threads (not shown). In yet another preferred embodiment, the valve core 12 of the automatic press-to-reset sealing valve 11 and the angle tube 13 are connected by a snap-fit ​​mechanism.

[0037] In this invention, the pressure gauge is a passive pressure gauge. The passive pressure gauge is driven by the pressure automatically generated when the refrigerant passes through it. In a preferred embodiment, the pressure gauge is a mechanical pressure gauge. In another preferred embodiment, the pressure gauge is a Bourdon tube pressure gauge. In yet another preferred embodiment, the pressure gauge is a bellows pressure gauge. Alternatively, in this invention, the pressure gauge can also be an active pressure gauge, using a dry cell battery or a lithium battery as a power source.

[0038] According to this invention, refrigerant can be easily added simply by pressing the filling head. The filling head has good sealing performance, preventing refrigerant leakage and environmental pollution even if not all refrigerant is used. Due to its universal structure, it is suitable not only for adding refrigerant to automotive air conditioning systems but also for other aerosol filling applications, tire sealant filling, etc. Furthermore, the adapter connector is easy to connect to automotive air conditioning pipes and provides good sealing. Most importantly, the pressure gauge not only detects the amount of refrigerant injected but also allows for intuitive filling based on the pressure gauge reading, avoiding insufficient filling or excessive filling that results in waste. It also detects leaks throughout the pipeline. It is low-cost and highly versatile.

[0039] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model. The protection scope of this utility model is defined by the appended claims.

Claims

1. A portable automotive air conditioning refrigerant charging device, characterized in that, The device includes a charging head, a connecting hose, a pressure gauge, and an adapter connector. The charging head is sealed to the refrigerant outlet. The charging head has an automatic press-and-reset sealing valve and a bend tube connected to the valve core of the automatic press-and-reset sealing valve. The automatic press-and-reset sealing valve includes an automatic press-and-reset knob and a valve body. By releasing the automatic press-and-reset knob, the automatic press-and-reset sealing valve is sealed to the outlet, allowing the refrigerant to pass through the valve core into the bend tube. The bend tube is connected to the connecting hose via a connector, which includes a first connecting hose and a second connecting hose. The charging head is connected to the pressure gauge via the first connecting hose, and the pressure gauge is connected to the adapter connector via the second connecting hose. The adapter connector is connected to the low-pressure port of the automotive air conditioning system to perform the refrigerant charging operation. The automatic press-to-reset knob is rotatably mounted on top of the main body of the automatic press-to-reset sealing valve; The filling head also includes a protective cap, an O-ring, and an O-gasket, which provide a buffer seal when the filling head and the outlet of the refrigerant tank are detachably installed.

2. The portable automotive air conditioning refrigerant charging device as described in claim 1, characterized in that, The protective cover is detachably installed on the filling head.

3. The portable automotive air conditioning refrigerant charging device as described in any one of claims 1-2, characterized in that, The automatic press-reset sealing valve and the angle tube are integrally injection molded structures.

4. The portable automotive air conditioning refrigerant charging device as described in any one of claims 1-2, characterized in that, The automatic press-reset sealing valve and the angle tube are separate molding structures.

5. The portable automotive air conditioning refrigerant charging device as described in claim 4, characterized in that, The valve core of the automatic press-reset sealing valve and the angle tube are connected by threads.

6. The portable automotive air conditioning refrigerant charging device as described in claim 4, characterized in that, The valve core of the automatic press-reset sealing valve and the angle tube are connected by a snap-fit ​​mechanism.

7. The portable automotive air conditioning refrigerant charging device as described in any one of claims 1-2, characterized in that, The pressure gauge may be a passive pressure gauge or an active pressure gauge.

8. The portable automotive air conditioning refrigerant charging device as described in any one of claims 1-2, characterized in that, Using aerosols to replace the refrigerant in automotive air conditioning systems, for use in aerosol additives.

9. The portable automotive air conditioning refrigerant adding device as described in claim 8, characterized in that, The aerosol is a tire sealant, used for adding tire sealant.

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