Refrigerant filling device

Abstract

The utility model provides a refrigerant filling device, and belongs to the field of automobile tools. The refrigerant filling device solves the problem of how to reduce the possibility of misoperation of the refrigerant filling device. According to the refrigerant filling device, the upper end of a valve rod is connected with a wrench in an abutting mode, the wrench is rotationally connected to a shell, a communicating pipe is connected to a tank opening valve, the shell is further provided with a pressure gauge communicated with the communicating pipe, the pressure gauge is located on the front side of the shell, the wrench is located on the rear side of the pressure gauge, an inserting hole is formed in the side portion of the wrench, and the wrench is connected with a limiting rod. The limiting rod is in an L shape, a mounting groove is formed in the shell, one section of the limiting rod is located in the mounting groove, and the other section of the limiting rod penetrates through the shell to be located in the inserting hole. According to the scheme, the limiting rod limits rotation of the spanner on the shell, before the refrigerant filling device is used, the limiting rod in the mounting groove needs to be taken out, the pressing rod is made to be disengaged from the inserting hole, rotation limitation on the spanner is relieved, then the spanner is pressed for filling, and the possibility of misoperation of the refrigerant filling device is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of automotive tool technology and relates to a refrigerant filling device. Background Technology

[0002] As an important component for improving the comfort of car passengers, automotive air conditioning has been widely recognized by car manufacturers and consumers. The automotive air conditioning system is a separate sealed circulation system. Depending on the working needs, a certain amount of refrigerant, commonly Freon, needs to be added to the compressor. During long-term use of a car, the cooling effect may deteriorate, due to reasons such as Freon leakage. Therefore, it is necessary to add Freon to the compressor. Freon is generally stored in a specially made gas canister in a fixed quantity. When the air conditioning compressor needs to be refilled with Freon, the gas canister usually needs to be connected to a specific ventilation tool for addition.

[0003] For example, the patent with application number CN201020200705.5 controls whether to charge the air conditioner by using a wrench and displays the pressure of the Freon in the air conditioner compressor on a dial. Since the wrench is located at the lower front of the device, users may not notice it and accidentally touch the vehicle equipment, causing the air tank to open. Alternatively, users may accidentally press the wrench while holding the air valve, causing the air tank to open and ultimately resulting in Freon leakage from the air tank, which reduces the user experience of the refrigerant charging device. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a refrigerant charging device. The technical problem this invention aims to solve is: how to reduce the possibility of misoperation of the refrigerant charging device and improve the user experience of the refrigerant charging device.

[0005] The objective of this utility model can be achieved through the following technical solution: A refrigerant charging device includes a housing and an opening valve disposed on the housing. The opening valve includes a valve body and a valve stem disposed on the valve body. A wrench is connected to the upper end of the valve stem. The wrench is rotatably connected to the housing. The wrench includes a pressing plate. A connecting pipe is connected to the opening valve. A pressure gauge connected to the connecting pipe is also provided on the housing. The pressure gauge is located on the front side of the housing, and the wrench is located on the rear side of the pressure gauge. A insertion hole is provided on the side of the wrench. A limiting rod is connected to the wrench. The limiting rod is "L"-shaped. An installation groove is provided on the housing. One end of the limiting rod is located in the installation groove, and the other end of the limiting rod passes through the housing and is located in the insertion hole.

[0006] In this refrigerant charging device, a limiting rod is installed on the wrench to restrict its rotation on the housing. Before using the refrigerant charging device, the limiting rod needs to be removed from the mounting slot so that the pressing rod can disengage from the insertion hole, thus releasing the restriction on the wrench's rotation. Only then can the wrench be pressed to charge the refrigerant. This design also places the wrench at the rear, making it easily visible to the user, reducing accidental touches and minimizing the possibility of misoperation of the refrigerant charging device, thereby improving the user experience.

[0007] In the aforementioned refrigerant charging device, the housing is further provided with a guide groove and a limiting groove located below the guide groove. One wall of the guide groove protrudes downwards to the other wall to form a limiting block, which is located between the guide groove and the limiting groove. The guide groove facilitates the entry of the limiting rod into the limiting groove, while the limiting block prevents the limiting rod from dislodging from the limiting groove.

[0008] In the aforementioned refrigerant charging device, there is a gap between the limiting rod and the bottom of the mounting groove. The housing also has a notch communicating with the wall of the mounting groove, and a guide ramp located below the notch. This structure facilitates the removal of the limiting rod from the mounting groove through the gap between the limiting rod and the bottom of the mounting groove during use.

[0009] In the aforementioned refrigerant charging device, the housing includes a third housing located on top of the main housing. The mounting groove is located on the third housing, and a rotating plate is also provided on the third housing. A rotating groove is formed on the rotating plate. Rotating shafts are provided on both sides of the wrench, located in front of the insertion hole and within the rotating groove. The rotating groove extends from top to bottom to the lower end of the rotating plate, facilitating the installation of the rotating shafts on the wrench.

[0010] In the aforementioned refrigerant charging device, the pressure gauge is mounted on the housing at an angle to the horizontal plane, with its surface facing upwards and backwards. The pressing plate extends downwards and backwards from the rear of the housing, with its upper surface also facing upwards and backwards. This structure facilitates observation of the pressure gauge and makes the wrench easily visible, reducing the risk of accidental wrench misoperation.

[0011] In the aforementioned refrigerant charging device, the housing three is inclined at an angle to the horizontal plane, with its upper surface facing upwards and rearwards. A mounting plate extends downwards from the housing three, and a hook is provided on the inner wall of the mounting plate. A mounting block is located at the lower end of the pressure gauge, positioned on the hook. A baffle extends downwards from the housing three, and a gap exists between the mounting plate and the baffle. This gap allows the mounting plate to deform, facilitating the installation of the pressure gauge on the housing.

[0012] In the aforementioned refrigerant charging device, the upper end of the valve stem is provided with a hemispherical abutment block, and the wrench is provided with an abutment surface that can abut against the abutment block. The abutment surface is located below the insertion hole. The abutment surface facilitates abutment against the abutment block, and pressing the wrench allows the valve stem to move within the valve body. At the same time, the abutment block limits the movement of the wrench, preventing the wrench's shaft from dislodging from the rotating groove.

[0013] In the aforementioned refrigerant charging device, a sealing groove is provided below the abutment block, and a sealing ring is provided inside the sealing groove. The sealing ring is set inside the sealing groove. A top plate is provided below the annular groove. A spring is sleeved on the valve stem, and one end of the spring abuts against the top plate. A second sealing groove is also provided on the valve stem, and a second sealing ring is sleeved inside the second sealing groove. A piercing needle is also provided below the valve stem.

[0014] In the aforementioned refrigerant charging device, the valve body is provided with an annular protrusion, the upper and lower ends of which are a conical surface one and a conical surface two, and the other end of the spring abuts against the conical surface one.

[0015] In the aforementioned refrigerant charging device, the connecting pipe is integrally formed with the valve body and is installed at an angle to the horizontal plane on the side wall of the valve body. Reinforcing ribs are provided between the valve body and the connecting pipe. These reinforcing ribs increase the connection strength between the valve body and the connecting pipe.

[0016] In the aforementioned refrigerant charging device, the housing further includes a first housing and a second housing located on both sides of the housing. The first and second housings are provided with snap-fit ​​grooves. The lower end of the third housing is provided with a snap-fit ​​plate, which snaps into the snap-fit ​​grooves. A limiting plate is also provided on the side wall of the valve body. The first and second housings are provided with snap-fit ​​grooves, and the limiting plate snaps into the snap-fit ​​grooves. A limiting strip is provided on the limiting plate, and the limiting strip abuts against the first and second housings. A mounting post is also provided on the outer side wall of the valve body, and the second housing is provided with a mounting hole, with the mounting post located within the mounting hole. The mounting post and mounting hole facilitate the installation of the valve body within the housing.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. In this utility model, a limiting rod is provided on the wrench to restrict the rotation of the wrench on the housing. Before using the refrigerant charging device, the limiting rod in the mounting slot needs to be removed so that the pressing rod can be disengaged from the insertion hole, thereby releasing the restriction on the rotation of the wrench, and then the wrench can be pressed to charge. This solution also makes the wrench easily visible to the user by placing it at the rear, reducing accidental contact with the wrench, reducing the possibility of misoperation of the refrigerant charging device, and improving the user experience of the refrigerant charging device.

[0019] 2. In this utility model, by setting a gap between the limiting rod and the bottom of the mounting groove, it is convenient for the filling device to remove the limiting rod from the mounting groove through the gap between the limiting rod and the bottom of the mounting groove during use. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0023] Figure 4 This is an exploded structural diagram of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the housing, inflation valve, and wrench of this utility model;

[0025] Figure 6 This is a cross-sectional structural schematic diagram of the present invention;

[0026] Figure 7 This is an enlarged structural schematic diagram of the shell three and its A part of this utility model;

[0027] In the diagram, 1. Housing; 1a. Housing I; 1b. Housing II; 1c. Housing III; 1c1. Rotating plate; 1c2. Rotating groove; 1c3. Mounting plate; 1c4. Hook; 1c5. Baffle; 1c6. Snap-fit ​​plate; 1d. Mounting groove; 1e. Guide groove; 1f. Limiting groove; 1g. Limiting block; 1h. Notch; 1i. Snap-fit ​​groove; 1j. Snap groove; 1k. Mounting hole; 1l. Guide slope; 2. Valve body; 2a. Annular protrusion; 2b. Conical surface I; 2c. Conical surface II; 2d 1. Limiting plate; 2e. Limiting strip; 2f. Mounting post; 3. Valve stem; 3a. Abutment block; 3b. Sealing groove one; 3c. Sealing groove two; 3d. Piercing needle; 4. Wrench; 4a. Pressing plate; 4b. Insertion hole; 4c. Abutment surface; 4d. Rotating shaft; 5. Connecting pipe; 6. Pressure gauge; 6a. Mounting block; 7. Limiting rod; 8. Sealing ring one; 9. Sealing ring two; 10. Reinforcing rib; 11. Spring. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] Example

[0030] like Figure 1As shown, a refrigerant charging device includes a housing 1. A pressure gauge 6 is mounted on the housing 1 at an angle to the horizontal plane, with its surface facing upwards and backwards. A wrench 4 is also rotatably mounted on the housing 1. A pressing plate 4a is located on the rear side of the wrench 4, extending downwards and backwards from the housing, with its upper surface facing upwards and backwards. A mounting groove 1d is also provided on the housing, within which a limiting rod 7 is installed. The limiting rod 7 is inserted into the wrench 4 to prevent accidental rotation of the wrench 4.

[0031] like Figure 2 Combination Figure 4 and Figure 7 As shown, the wrench 4 has a insertion hole 4b. The limiting rod 7 is L-shaped, with one end of the limiting rod 7 located in the mounting groove 1d and the other end of the limiting rod 7 passing through the housing and located in the insertion hole 4b. The housing also has a guide groove 1e and a limiting groove 1f located below the guide groove 1e. The guide groove 1e facilitates the entry of the end of the limiting rod 7 into the limiting groove 1f, and the limiting groove 1f makes it difficult for the limiting rod 7 to come out of the mounting groove 1d. One wall of the guide groove 1e protrudes from top to bottom to the other wall to form a limiting block 1g. The limiting block 1g is located between the guide groove 1e and the limiting groove 1f, and the limiting block 1g prevents the limiting rod 7 from coming out of the limiting groove 1f. There is a gap between the limiting rod 7 and the bottom of the mounting groove 1d. The housing is also provided with a notch 1h that communicates with the groove wall of the mounting groove 1d. The housing is also provided with a guide slope, which is located below the notch 1h. The above structure facilitates the removal of the limiting rod 7 from the limiting groove 1f and from the wrench 4, thereby releasing the restriction on the wrench 4.

[0032] like Figure 3 Combination Figure 4 and Figure 5 As shown, the housing includes a housing 3 1c located on top of the housing, and housing 1a and housing 2 1b located on both sides of the housing. Housing 1a and housing 2 1b are provided with snap-fit ​​grooves 1i. The lower end of housing 3 1c is provided with a snap-fit ​​plate 1c6, which snaps into the snap-fit ​​groove 1i. After housing 1a, housing 2 1b and housing 3 1c are in place, housing 1a and housing 2 1b are then fixed with screws. Housing 3 1c is inclined at an angle to the horizontal plane, with its upper surface facing upward and backward. A mounting plate 1c3 extends downward from housing 3 1c, and a hook 1c4 is provided on the inner wall of the mounting plate 1c3. The lower end of the pressure gauge 6 is provided with a mounting block 6a, which is located on the hook 1c4. A baffle 1c5 extends downward from housing 3 1c, and there is a gap between the mounting plate 1c3 and the baffle 1c5.

[0033] like Figure 4 and Figure 5As shown, a rotating plate 1c1 is also provided on the housing 3 1c. In this embodiment, there are four rotating plates 1c1, which are arranged in pairs on both sides of the housing 3 1c. A rotating groove 1c2 is provided on the rotating plate 1c1. A rotating shaft is provided on both sides of the wrench 4. The rotating shaft is located in front of the insertion hole 4b and is located in the rotating groove 1c2. A can opening valve is also provided inside the housing. The can opening valve includes a valve body 2 and a valve core provided on the valve body 2. A limiting plate 2d is provided on the side wall of the valve body 2. A slot 1j is provided on the housing 1a and the housing 2b. The limiting plate 2d is engaged in the slot 1j. A limiting strip 2e is provided on the limiting plate 2d. The limiting strip 2e abuts against the housing 1a and the housing 2b. A mounting post 2f is also provided on the outer side wall of the valve body 2. A mounting hole 1k is also provided on the housing 2b. The mounting post 2f is located in the mounting hole 1k.

[0034] like Figure 4 and Figure 5 As shown, the upper end of the valve stem 3 is provided with a hemispherical abutment block 3a. The wrench 4 is provided with an abutment surface 4c that can abut against the abutment block 3a. The abutment surface 4c is located below the insertion hole 4b. Below the abutment block 3a, there is also a sealing groove 3b. A sealing ring 8 is provided in the sealing groove 3b. Below the sealing groove 3b, there is an abutment plate. A spring is fitted on the valve stem 3. One end of the spring abuts against the abutment plate. The valve stem 3 is also provided with a second sealing groove 3c. A second sealing ring 9 is fitted in the second sealing groove 3c. Below the valve stem 3, there is also a piercing needle 3d. The valve body 2 is provided with an annular protrusion 2a. The upper and lower ends of the annular protrusion 2a are a conical surface 2b and a conical surface 2c. The other end of the spring abuts against the conical surface 2b. A connecting pipe 5 is connected to the front end of the valve body 2. The connecting pipe 5 is integrally formed with the valve body 2 and is set at an angle to the horizontal plane on the side wall of the valve body 2. A reinforcing rib 10 is provided between the valve body 2 and the connecting pipe. The connecting pipe 5 is connected to the pressure gauge 6. A connection part for threaded connection with the gas filling tank is also provided below the opening valve.

[0035] The working principle of this solution is as follows: Figure 5 As shown, before using the refrigerant charging device, the limiting rod 7 is located inside the insertion hole 4b, and the wrench 4 is in the locked state, as indicated. Figure 6 As shown, when the refrigerant charging device is used, the limiting rod 7 is removed from the mounting groove 1d and taken out from the insertion hole 4b, so that the wrench 4 is in the unlocked state. Press the pressing plate 4a, so that the valve rod 3 moves down, and the piercing needle 3d pierces the canister, so that the gas in the charging canister enters the connecting pipe 5 from the valve body 2. The connecting pipe 5 is connected to the car air conditioning compressor, and the Freon in the charging canister enters the car air conditioning compressor. The gas pressure of the car air conditioning compressor is known by observing the pressure gauge. When the gas pressure meets the requirements, the pressing plate 4a is released, and the valve rod 3 is reset under the action of the spring. The valve rod 3 pushes upward so that the wrench 4 is also reset. At this time, the sealing ring 8 is located in the annular protrusion 2a, so that the charging canister and the connecting pipe 5 are isolated.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0037] Although this article uses the following terms extensively: 1. Shell; 1a. Shell One; 1b. Shell Two; 1c. Shell Three; 1c1. Rotating Plate; 1c2. Rotating Groove; 1c3. Mounting Plate; 1c4. Hook; 1c5. Baffle; 1c6. Snap-fit ​​Plate; 1d. Mounting Groove; 1e. Guide Groove; 1f. Limit Groove; 1g. Limiting Block; 1h. Notch; 1i. Snap-fit ​​Groove; 1j. Snap Groove; 1k. Mounting Hole; 2. Valve Body; 2a. Annular Protrusion; 2b. Conical Surface One; 2c. Conical Surface Two; 2d. Limiting Plate; 2e. The following are some of the terms used: 1. Limiting strip; 2f. Mounting post; 3. Valve stem; 3a. Abutment block; 3b. Sealing groove one; 3c. Sealing groove two; 3d. Piercing needle; 4. Wrench; 4a. Pressing plate; 4b. Insertion hole; 4c. Abutment surface; 5. Connecting pipe; 6. Pressure gauge; 6a. Mounting block; 7. Limiting rod; 8. Sealing ring one; 9. Sealing ring two; 10. Reinforcing rib, etc. However, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A refrigerant filling device comprising a housing (1) and a can opening valve arranged on the housing (1), the can opening valve comprising a valve body (2) and a valve stem (3) arranged on the valve body (2), the upper end of the valve stem (3) being connected to a spanner (4), the spanner (4) being rotatably connected to the housing, the spanner (4) comprising a pressing plate (4a), a communication pipe (5) being connected to the can opening valve, a pressure gauge (6) being further arranged on the housing (1) and being in communication with the communication pipe (5), characterized in that, The pressure gauge (6) is located on the front side of the shell (1), the wrench (4) is located on the rear side of the pressure gauge (6), the side of the wrench (4) is provided with a plug hole (4b), the wrench (4) is connected with a limiting rod (7), the limiting rod (7) is in the shape of "L", the shell (1) is provided with a mounting groove (1d), one section of the limiting rod (7) is located in the mounting groove (1d), the other section of the limiting rod (7) passes through the shell (1) and is located in the plug hole (4b).

2. A refrigerant charging apparatus according to claim 1, wherein The shell is further provided with a guide groove (1e) and a limiting groove (1f) located below the guide groove (1e), one groove wall of the guide groove (1e) protrudes from top to bottom to form a limiting block (1g) to the other groove wall, and the limiting block (1g) is located between the guide groove (1e) and the limiting groove (1f).

3. A refrigerant charging apparatus according to claim 1 or 2, wherein The limiting rod (7) has a gap with the groove bottom of the mounting groove (1d), the shell is further provided with a notch (1h) in communication with the groove wall of the mounting groove (1d), and the shell is further provided with a guide inclined surface located below the notch (1h).

4. A refrigerant charging apparatus according to claim 3, wherein The shell comprises a shell three (1c) located above the shell, the mounting groove (1d) is located on the shell three (1c), the shell three (1c) is further provided with a rotating plate (1c1), the rotating plate (1c1) is provided with a rotating groove (1c2), the two sides of the wrench (4) are provided with rotating shafts, the rotating shafts are located in front of the plug hole (4b), and the rotating shafts are located in the rotating groove (1c2).

5. A refrigerant charging apparatus according to claim 4, wherein The pressure gauge (6) is arranged on the shell at an angle to the horizontal plane, the surface of the pressure gauge (6) faces upward, the pressing plate (4a) extends to the lower rear side of the shell, the upper surface of the pressing plate (4a) faces upward, the shell three (1c) is arranged at an angle to the horizontal plane, the upper surface of the shell three (1c) faces upward, the shell three (1c) is further provided with a mounting plate (1c3) extending downward, the inner wall of the mounting plate (1c3) is provided with a clamping hook (1c4), the lower end of the pressure gauge (6) is provided with a mounting block (6a), the mounting block (6a) is located on the clamping hook (1c4), the shell three (1c) is further provided with a baffle (1c5) extending downward, and a gap is formed between the mounting plate (1c3) and the baffle (1c5).

6. A refrigerant charging apparatus according to claim 5, wherein The upper end of the valve rod (3) is provided with a hemispherical abutting block (3a), the wrench (4) is provided with an abutting surface (4c) capable of abutting against the abutting block (3a), and the abutting surface (4c) is located below the plug hole (4b).

7. A refrigerant charging apparatus according to claim 6, wherein The lower part of the abutting block (3a) is also provided with a sealing groove I (3b), the sealing groove I (3b) is provided with a sealing ring I (8), the lower part of the sealing groove I (3b) is provided with an abutting plate, the valve rod (3) is provided with a spring, one end of the spring abuts against the abutting plate, the valve rod (3) is also provided with a sealing groove II (3c), the sealing groove II (3c) is provided with a sealing ring II (9), the lower part of the valve rod (3) is also provided with a piercing needle (3d).

8. A refrigerant charging apparatus according to claim 7, wherein The valve body (2) is provided with an annular protrusion (2a), the upper and lower ends of the annular protrusion (2a) are conical face I (2b) and conical face II (2c), the other end of the spring abuts against the conical face I (2b).

9. The refilling device according to claim 1, characterized in that The communication pipe (5) is integrally formed with the valve body (2) and is arranged on the side wall of the valve body (2) at an angle with the horizontal plane, and the valve body (2) and the connecting pipe are provided with a reinforcing rib (10).

10. The refilling device according to claim 4, characterized in that The shell further comprises a shell I (1a) and a shell II (1b) located on both sides of the shell, the shell I (1a) and the shell II (1b) are provided with clamping grooves (1i), the lower end of the shell III (1c) is provided with a clamping plate (1c6), the clamping plate (1c6) is clamped in the clamping groove (1i), the side wall of the valve body (2) is also provided with a limiting plate (2d), the shell I (1a) and the shell II (1b) are provided with clamping grooves (1j), the limiting plate (2d) is clamped in the clamping groove (1j), the limiting plate (2d) is provided with a limiting strip (2e), the limiting strip (2e) abuts against the shell I (1a) and the shell II (1b), the outer side wall of the valve body (2) is also provided with a mounting column (2f), the shell II (1b) is also provided with a mounting hole (1k), and the mounting column (2f) is located in the mounting hole (1k).

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