Maintenance-free automobile refrigerant quantity observer

Abstract

The invention discloses a maintenance-free automobile refrigerant quantity observer which comprises a pressure gauge, a cap body and a pressing body, the pressure gauge is arranged at the top of the cap body, the pressing body is arranged in the cap body, and an air channel is formed in the end face of the bottom end of the pressing body. The top end of the air channel penetrates through the cap body and extends to the top surface of the cap body to be communicated with the pressure gauge, when the cap body is screwed at the filling port, the pressing body extrudes the valve core to open the valve core, the cap body comprises a cover body and a cylinder body, the cylinder body is arranged on the bottom surface of the cover body, and the driving assembly is arranged on the cylinder body. The containing cavity is formed in the cover body, the air channel is divided into the two sections, the two sections of air channels are communicated through the channel in the cover body, the sealing assembly is arranged to be used for opening or closing the air channel, and therefore refrigerant leakage caused by long-term opening of the air channel can be prevented. The maintenance-free automobile refrigerant quantity observer has the effects of controlling opening or closing of the air channel and preventing refrigerant leakage.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air conditioning, and in particular to a maintenance-free automobile refrigerant quantity observer. Background Art

[0002] The valve cap can isolate the air and prevent dust, water, oil, etc. from damaging the valve core sealing rubber, thus extending the service life of the valve core. If there is no valve cap for a long time, it is very easy to damage the valve core.

[0003] The refrigerant addition port of the car will also use a valve cap. A Chinese utility model patent with the publication number: CN221392933U, entitled: A maintenance-free automobile refrigerant quantity observer, records: including a pressure gauge, an airway, a positioning groove, an outer thread and a dust cover shell, the dust cover shell is internally installed with an inner cavity blocking positioning block, the outer surface of the inner cavity blocking positioning block is circumferentially evenly distributed with outer threads, one side of the inner cavity blocking positioning block is provided with a positioning groove, and one side of the positioning groove is provided with an airway. It overcomes the shortcomings of the existing automobile valve race in the prior art, which has a simple overall structure and simply serves to seal the gas in the car. The inner cavity blocking positioning block is installed on the air-conditioning joint pipe, and the gas directly enters the pressure gauge through the airway, and the gas value can be directly observed by the naked eye.

[0004] The valve cap described in the above prior art will always keep the valve core in an open state during actual use. Due to the high pressure in the refrigerant cavity, the refrigerant will continue to leak out, which urgently needs to be improved. Summary of the invention

[0005] In view of the above problems, a maintenance-free automobile refrigerant quantity observer is provided to solve the problems existing in the prior art.

[0006] The specific technical solutions are as follows:

[0007] A maintenance-free automobile refrigerant quantity observer comprises a pressure gauge, a cap body and a pressing body, wherein the pressure gauge is arranged on the top of the cap body, the pressing body is arranged inside the cap body, an air passage is provided on the bottom end face of the pressing body, the top end of the air passage extends through the cap body to communicate with the top face of the cap body and the pressure gauge, when the cap body is screwed on the filling port, the pressing body squeezes the valve core to open it, and further comprises a driving component and a closing component, the cap body comprises a cover body and a cylinder body, the cylinder body is arranged on the bottom face of the cover body, an accommodating cavity is provided in the cover body, and the accommodating cavity is communicated with the air passage, the driving component and the closing component are both arranged in the accommodating cavity, the driving component is transmission-connected with the closing component, and when the driving component is in operation, the closing component can be driven to close the air passage.

[0008] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the following characteristics: the driving component includes a turntable and a push block, the cover body includes an upper base plate, a lower base plate and a connecting shaft, the upper end of the connecting shaft is connected to the center of the bottom surface of the upper base plate, and the lower end of the connecting shaft is connected to the center of the top surface of the lower base plate, a gap is left between the upper base plate and the lower base plate, a through hole is opened at the center of the turntable, the turntable is arranged in the gap, and the connecting shaft passes through the through hole, the push block is connected to the edge of the turntable, the upper base plate and the lower base plate are both provided with air passages aligned with each other, the turntable is also provided with an air passage, and the turntable is also provided with a groove, the closing component is arranged in the groove, and when the push block is pushed, the turntable can be rotated around the connecting shaft, and the air passage in the upper base plate, the air passage in the turntable and the air passage in the lower base plate are connected in sequence, and the air passage in the lower base plate and / or the air passage in the upper base plate are closed by rotating at another characteristic angle.

[0009] The beneficial effect of the above scheme is that since the airway is eccentrically arranged, the airway on the turntable can be used to control the on-off of the airway by rotating the turntable. When the pressure gauge reading is required, the turntable can be rotated to open the airway.

[0010] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the following characteristics, and further includes at least one limit block, a limit groove is provided on the side wall of the upper base plate, the limit block is arranged on the side of the push block facing the upper base plate, the limit block extends into the limit groove, when the push block is pushed so that the limit block is at one end of the limit groove, the air channel in the upper base plate, the air channel in the turntable and the air channel in the lower base plate are connected in sequence, and when the push block is pushed so that the limit block is at the other end of the limit groove, the closing component closes the air channel in the lower base plate and / or the air channel in the upper base plate.

[0011] The beneficial effect of the above solution is that the limiting block and the limiting groove cooperate with each other, so that the operator can accurately determine the airway position on the turntable.

[0012] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the following feature: the sealing component includes a sealing body and an elastic member, one end of the elastic member is connected to the bottom wall of the groove, the other end of the elastic member is connected to one end of the sealing body, and the other end of the sealing body is arranged in an arc shape. When the turntable rotates until the groove faces the airway, the elastic member drives the other end of the sealing body to extend into the airway to close it.

[0013] The beneficial effect of the above solution is that when the groove faces the airway, the elastic member rebounds to drive the closing body into the airway to close it.

[0014] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the following characteristics: the driving assembly includes a knob, a screw and a threaded barrel; a connecting channel is provided on the bottom wall of the accommodating chamber; the other end of the connecting channel is communicated with the air channel in the pressing body; the air channel in the cover body is communicated with the connecting channel; the knob is arranged at one end of the screw, and the knob is outside the cover body; the other end of the screw extends into the accommodating chamber and then continues to extend into the threaded barrel, and the screw is threadedly connected to the threaded barrel; the threaded barrel is closed at one end away from the screw; one end of the closing assembly is connected to the closed end face of the threaded barrel, and the other end of the closing assembly extends into the connecting channel; when the closed end face of the threaded barrel moves to the bottom wall of the accommodating chamber, the closing assembly closes the connecting channel.

[0015] The beneficial effect of the above scheme is that by turning the knob, the screw is rotated, the threaded barrel is driven forward, and the closing component is pushed forward, so that the connecting channel is closed.

[0016] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the following characteristics: one end of the connecting channel close to the accommodating cavity is in a horizontal state, and one end of the connecting channel close to the pressing body is in a vertical state. The connection between the horizontal end and the vertical end of the connecting channel is an arc transition, and the airway in the cover body is connected to the side of the horizontal end of the connecting channel.

[0017] The beneficial effect of the above scheme is as follows: the connecting channel is set to a bent state, and the horizontal end of the connecting channel is used to place the closing component, and when the closing component enters the vertical end of the connecting channel, the connecting channel can be closed.

[0018] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the following feature: the closing component includes a transmission rod and a flexible blocking portion, one end of the transmission rod is connected to the closed end face of the threaded barrel, and the other end of the transmission rod is connected to one end of the blocking portion, and when the closed end face of the threaded barrel moves to the bottom wall of the accommodating cavity, the blocking end enters the vertical end of the connecting channel to close it.

[0019] The beneficial effect of the above solution is that when the airway needs to be opened, the transmission rod and the blocking part are located in the horizontal end of the connecting channel, and when the airway needs to be closed, the blocking part is pushed into the vertical end of the connecting channel.

[0020] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the following feature: the blocking portion includes a flexible rod and a plurality of sealing rings, and the plurality of sealing rings are spaced apart and sleeved on the flexible rod. When one end of the flexible rod away from the transmission rod completely enters the vertical end of the connecting channel, at least two of the sealing rings close the vertical end of the connecting channel.

[0021] The beneficial effect of the above solution is that when the sealing ring enters the vertical end of the connecting channel, the sealing ring fits tightly against the side wall of the connecting channel, so that the connecting channel is closed.

[0022] The above-mentioned maintenance-free automobile refrigerant quantity observer also has the characteristic that the vertical end of the connecting channel gradually decreases in diameter from top to bottom.

[0023] The beneficial effects of the above solution are as follows: the vertical end of the connecting channel is wider at the top and narrower at the bottom, and the more the sealing ring goes in, the more it is compressed and deformed, so that the connecting channel is closed more thoroughly.

[0024] In summary, the beneficial effects of this scheme are:

[0025] In the maintenance-free automobile refrigerant quantity observer provided by the present invention, the airway is divided into two sections, the two sections of the airway are connected through the channel in the cover body, and a closing component is provided for opening or closing the airway, so that the airway can be prevented from being opened for a long time to cause refrigerant leakage. The maintenance-free automobile refrigerant quantity observer provided by the present invention has the effect of controlling the opening or closing of the airway to prevent refrigerant leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the front cross-section structure of the first embodiment of the maintenance-free automobile refrigerant quantity observer of the present invention;

[0027] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0028] Figure 3 It is a front cross-sectional structural schematic diagram of the second embodiment of the maintenance-free automobile refrigerant quantity observer of the present invention in an open state;

[0029] Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0030] Figure 5 It is a front cross-sectional structural schematic diagram of a second embodiment of the maintenance-free automobile refrigerant quantity observer of the present invention in a closed state;

[0031] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0032] Description of the drawings: 1. Cover body; 101. Lower base plate; 102. Connecting shaft; 103. Upper base plate; 2. Cylinder body; 3. Pressing body; 4. Turntable; 5. Push block; 6. Elastic member; 7. Closing body; 8. Knob; 9. Screw; 10. Threaded cylinder; 11. Transmission rod; 12. Connecting channel; 13. Flexible rod; 14. Sealing ring. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0035] The present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited thereto.

[0036] Figure 1 This is a schematic front cross-sectional view of the first embodiment of the maintenance-free automobile refrigerant quantity observer of the present invention. Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle, Figure 3 This is a schematic front cross-sectional view of the second embodiment of the maintenance-free automobile refrigerant quantity observer of the present invention in an open state. Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in the middle, Figure 5 Schematic diagram of the front cross-section structure of the second embodiment of the maintenance-free automobile refrigerant quantity observer of the present invention in a closed state. Figure 6 For the present invention Figure 5 The enlarged structural diagram at C in the middle is as follows: Figure 1 and Figure 2 As shown, the maintenance-free automobile refrigerant quantity observer provided by the present embodiment includes: a pressure gauge, a cap body and a pressing body 3, the pressure gauge is arranged on the top of the cap body, the pressing body 3 is arranged inside the cap body, an airway is opened on the bottom end face of the pressing body 3, the top end of the airway extends through the cap body to communicate with the top surface of the cap body and the pressure gauge, when the cap body is screwed on the filling port, the pressing body 3 squeezes the valve core to open it, and also includes a driving component and a closing component, the cap body includes a cover body 1 and a cylinder body 2, the cylinder body 2 is arranged on the bottom surface of the cover body 1, an accommodating cavity is opened in the cover body 1, and the accommodating cavity is communicated with the airway, the driving component and the closing component are both arranged in the accommodating cavity, the driving component and the closing component are transmission connected, and the driving component can drive the closing component to close the airway when it is in operation.

[0037] In the above embodiment, the driving assembly includes a turntable 4 and a push block 5, the cover body 1 includes an upper base plate 103, a lower base plate 101 and a connecting shaft 102, the upper end of the connecting shaft 102 is connected to the center of the bottom surface of the upper base plate 103, the lower end of the connecting shaft 102 is connected to the center of the top surface of the lower base plate 101, a gap is left between the upper base plate 103 and the lower base plate 101, a through hole is opened at the center of the turntable 4, the turntable 4 is arranged in the gap, and the connecting shaft 102 passes through the through hole, the push block 5 is connected to the edge of the turntable 4, and the upper Mutually aligned air passages are provided in the base plate 103 and the lower base plate 101, and an air passage is also provided on the turntable 4. The turntable 4 is also provided with a groove, and a sealing component is arranged in the groove. When the push block 5 is pushed, the turntable 4 can rotate around the connecting shaft 102. By rotating a specific angle, the air passages in the upper base plate 103, the air passages in the turntable 4 and the air passages in the lower base plate 101 are connected in sequence. By rotating another specific angle, the sealing component closes the air passages in the lower base plate 101 and / or the air passages in the upper base plate 103.

[0038] In the above embodiment, at least one limit block is further included, and a limit groove is provided on the side wall of the upper substrate 103. The limit block is arranged on the side of the push block 5 facing the upper substrate 103, and the limit block extends into the limit groove. When the push block 5 is pushed so that the limit block is at one end of the limit groove, the air channel in the upper substrate 103, the air channel in the turntable 4 and the air channel in the lower substrate 101 are connected in sequence. When the push block 5 is pushed so that the limit block is at the other end of the limit groove, the closing component closes the air channel in the lower substrate 101 and / or the air channel in the upper substrate 103.

[0039] In the above embodiment, the sealing component includes a sealing body 7 and an elastic member 6, one end of the elastic member 6 is connected to the bottom wall of the groove, the other end of the elastic member 6 is connected to one end of the sealing body 7, and the other end of the sealing body 7 is arranged to be an arc surface. When the turntable 4 rotates until the groove faces the airway, the elastic member 6 drives the other end of the sealing body 7 to extend into the airway to close it.

[0040] like Figure 3-Figure 6 As shown, in another preferred embodiment, the driving assembly includes a knob 8, a screw 9 and a threaded barrel 10, and a connecting channel 12 is opened on the bottom wall of the accommodating chamber, and the other end of the connecting channel 12 is communicated with the airway in the pressing body 3, and the airway in the cover body 1 is communicated with the connecting channel 12. The knob 8 is arranged at one end of the screw 9, and the knob 8 is outside the cover body 1. The other end of the screw 9 extends into the accommodating chamber and then continues to extend into the threaded barrel 10, and the screw 9 is threadedly connected to the threaded barrel 10, and the end of the threaded barrel 10 away from the screw 9 is closed, one end of the closing assembly is connected to the closed end face of the threaded barrel 10, and the other end of the closing assembly extends into the connecting channel 12. When the closed end face of the threaded barrel 10 moves to the bottom wall of the accommodating chamber, the closing assembly closes the connecting channel 12.

[0041] In the above embodiment, one end of the connecting channel 12 close to the accommodating cavity is in a horizontal state, and the end of the connecting channel 12 close to the pressing body 3 is in a vertical state. The connection between the horizontal end and the vertical end of the connecting channel 12 is an arc transition, and the airway in the cover body 1 is connected to the side of the horizontal end of the connecting channel 12.

[0042] In the above embodiment, the closing component includes a transmission rod 11 and a flexible blocking portion, one end of the transmission rod 11 is connected to the closed end face of the threaded barrel 10, and the other end of the transmission rod 11 is connected to one end of the blocking portion. When the closed end face of the threaded barrel 10 moves to the bottom wall of the accommodating cavity, the blocking end enters the vertical end of the connecting channel 12 to close it.

[0043] In the above embodiment, the blocking portion includes a flexible rod 13 and a plurality of sealing rings 14, and the plurality of sealing rings 14 are spaced apart on the flexible rod 13. When one end of the flexible rod 13 away from the transmission rod 11 completely enters the vertical end of the connecting channel 12, at least two sealing rings 14 close the vertical end of the connecting channel 12.

[0044] In the above embodiment, the diameter of the vertical end of the connecting channel 12 gradually decreases from top to bottom.

[0045] Working principle: In the first embodiment, the cap is covered on the refrigerant filling port. At this time, the pressing body 3 pushes the valve core downward to open the refrigerant filling port. When the pressure gauge needs to be read, the turntable 4 is rotated so that the airway on the turntable 4 is connected to the airway in the upper substrate 103 and the airway in the lower substrate 101, so that the pressure gauge is connected to the refrigerant filling port. After the reading is completed, the turntable 4 is rotated so that the groove is facing the airway, and the elastic member 6 rebounds, so that the closing body 7 enters the airway, and the airway is closed to prevent the refrigerant from leaking. In another preferred embodiment, when it is necessary to read When the pressure gauge is in the state of being opened, the blocking part is in the horizontal end of the connecting channel 12. At this time, the airway in the cover body 1, the connecting channel 12 and the airway in the pressing body 3 are connected in sequence, so that the pressure gauge is connected to the refrigerant filling port. After the reading is completed, the knob 8 is turned to drive the screw 9 to rotate, drive the threaded barrel 10 forward, and the transmission rod 11 is pushed forward, so that the flexible rod 13 bends and enters the vertical end of the connecting channel 12. Since the vertical end of the connecting channel 12 is wide at the top and narrow at the bottom, the sealing ring 14 closes the vertical end of the connecting channel 12, so that the refrigerant filling port remains closed.

[0046] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the specification of the present invention should be included in the protection scope of the present invention.

Claims

1. A maintenance-free automobile refrigerant quantity observer, comprising a pressure gauge, a cap body and a pressing body (3), wherein the pressure gauge is arranged on the top of the cap body, the pressing body (3) is arranged inside the cap body, an air passage is provided on the bottom end surface of the pressing body (3), the top end of the air passage extends through the cap body to communicate with the top surface of the cap body and the pressure gauge, when the cap body is screwed on the filling port, the pressing body (3) squeezes the valve core to open it, characterized in that: The invention also comprises a driving component and a closing component, wherein the cap body comprises a cover body (1) and a cylinder body (2), wherein the cylinder body (2) is arranged on the bottom surface of the cover body (1), wherein a receiving cavity is provided in the cover body (1), and wherein the receiving cavity is communicated with the airway, wherein the driving component and the closing component are both arranged in the receiving cavity, wherein the driving component and the closing component are connected in a transmission manner, and wherein when the driving component is in operation, the closing component can be driven to close the airway.

2. The maintenance-free automobile refrigerant quantity observer according to claim 1, characterized in that: The driving assembly comprises a turntable (4) and a push block (5); the cover body (1) comprises an upper base plate (103), a lower base plate (101) and a connecting shaft (102); the upper end of the connecting shaft (102) is connected to the center of the bottom surface of the upper base plate (103); the lower end of the connecting shaft (102) is connected to the center of the top surface of the lower base plate (101); a gap is left between the upper base plate (103) and the lower base plate (101); a through hole is opened at the center of the turntable (4); the turntable (4) is arranged in the gap, and the connecting shaft (102) passes through the through hole; the push block (5) is connected to the edge of the turntable (4); Mutually aligned air passages are provided in the upper substrate (103) and the lower substrate (101), and an air passage is also provided on the turntable (4). The turntable (4) is also provided with a groove, and the sealing component is arranged in the groove. When the push block (5) is pushed, the turntable (4) can be rotated around the connecting shaft (102). When the turntable (5) is rotated by a specific angle, the air passage in the upper substrate (103), the air passage in the turntable (4) and the air passage in the lower substrate (101) are connected in sequence. When the turntable (5) is rotated by another specific angle, the sealing component causes the air passage in the lower substrate (101) and / or the air passage in the upper substrate (103) to be closed.

3. The maintenance-free automobile refrigerant quantity observer according to claim 2, characterized in that: The invention also comprises at least one limit block, a limit groove is provided on the side wall of the upper substrate (103), the limit block is arranged on the side of the push block (5) facing the upper substrate (103), and the limit block extends into the limit groove. When the push block (5) is pushed so that the limit block is at one end of the limit groove, the air channel in the upper substrate (103), the air channel in the turntable (4) and the air channel in the lower substrate (101) are connected in sequence. When the push block (5) is pushed so that the limit block is at the other end of the limit groove, the closing component closes the air channel in the lower substrate (101) and / or the air channel in the upper substrate (103).

4. The maintenance-free automobile refrigerant quantity observer according to claim 3 is characterized in that: The sealing component comprises a sealing body (7) and an elastic member (6), one end of the elastic member (6) is connected to the bottom wall of the groove, the other end of the elastic member (6) is connected to one end of the sealing body (7), and the other end of the sealing body (7) is arranged in an arc shape. When the rotating disk (4) rotates until the groove faces the airway, the elastic member (6) drives the other end of the sealing body (7) to extend into the airway to seal it.

5. The maintenance-free automobile refrigerant quantity observer according to claim 1, characterized in that: The driving assembly comprises a knob (8), a screw rod (9) and a threaded barrel (10); a connecting channel (12) is provided on the bottom wall of the accommodating chamber; the other end of the connecting channel (12) is communicated with the air channel in the pressing body (3); the air channel in the cover body (1) is communicated with the connecting channel (12); the knob (8) is arranged at one end of the screw rod (9), and the knob (8) is located outside the cover body (1); the other end of the screw rod (9) extends into the accommodating chamber and then continues to extend into the threaded barrel (10); the screw rod (9) is threadedly connected to the threaded barrel (10); the end of the threaded barrel (10) away from the screw rod (9) is closed; one end of the closing assembly is connected to the closed end face of the threaded barrel (10), and the other end of the closing assembly extends into the connecting channel (12); when the closed end face of the threaded barrel (10) moves to the bottom wall of the accommodating chamber, the closing assembly closes the connecting channel (12).

6. The maintenance-free automobile refrigerant quantity observer according to claim 5, characterized in that: One end of the connecting channel (12) close to the accommodating cavity is in a horizontal state, and one end of the connecting channel (12) close to the pressing body (3) is in a vertical state. The connection between the horizontal end and the vertical end of the connecting channel (12) is an arc transition, and the airway in the cover body (1) is connected to the side of the horizontal end of the connecting channel (12).

7. The maintenance-free automobile refrigerant quantity observer according to claim 6, characterized in that: The sealing component comprises a transmission rod (11) and a flexible blocking portion, one end of the transmission rod (11) is connected to the closed end face of the threaded barrel (10), and the other end of the transmission rod (11) is connected to one end of the blocking portion, and when the closed end face of the threaded barrel (10) moves to abut against the bottom wall of the accommodating cavity, the blocking end enters the vertical end of the connecting channel (12) to close it.

8. The maintenance-free automobile refrigerant quantity observer according to claim 7, characterized in that: The blocking portion comprises a flexible rod (13) and a plurality of sealing rings (14). The plurality of sealing rings (14) are sleeved on the flexible rod (13) at intervals. When one end of the flexible rod (13) away from the transmission rod (11) completely enters the vertical end of the connecting channel (12), at least two of the sealing rings (14) close the vertical end of the connecting channel (12).

9. The maintenance-free automobile refrigerant quantity observer according to claim 8, characterized in that: The vertical end of the connecting channel (12) gradually decreases in diameter from top to bottom.

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