Ejector pin mechanism of refrigerant filling gun and refrigerant filling assembly

Abstract

The utility model provides a refrigerant filling gun ejector pin mechanism and a refrigerant filling assembly, and relates to the field of refrigerant filling machines. The ejector pin mechanism of the refrigerant filling gun comprises a gun head shell, a first ejector pin, a second ejector pin, a third ejector pin and a fourth ejector pin, filling the ejector pin; one end of the gun head is embedded in the gun head shell in a sliding manner; and a thimble sliding sleeve; the ejector pin sliding sleeve is embedded in the gun head shell in a sliding mode and arranged on the filling ejector pin in a sliding and sleeving mode, an automatic separation spring is arranged between the ejector pin sliding sleeve and the inner wall of the gun head shell, and the automatic separation spring can press and move the ejector pin sliding sleeve outwards; according to the refrigerant filling assembly, a quick-plug male head is additionally arranged on the basis of a refrigerant filling gun ejector pin mechanism. By arranging the gun head shell, the ejector pin sliding sleeve and the filling ejector pin which are matched with one another, the quick-plug male head can be pushed out of the gun head shell; the problem that the filling gun head is difficult to separate from the quick-plug male head is solved.

Description

Technical Field

[0001] The utility model relates to the field of refrigerant filling machines, in particular to a refrigerant filling gun ejector mechanism and a refrigerant filling component. Background Art

[0002] A refrigerant charging machine, also known as a refrigerant charging machine or a refrigerant filling machine, is a device specifically used to charge or recover refrigerant in a refrigeration system. This equipment is very important during the installation, repair and maintenance of a refrigeration system, especially when refrigerant needs to be added or replaced.

[0003] During the refrigerant filling process, for convenience, the filling gun of the refrigerant filling machine is generally connected to the quick-plug male connector, and then the refrigerant is filled into the refrigeration system through the pipe connected to the quick-plug male connector. However, after the existing refrigerant filling machine has finished filling the refrigerant, in order to prevent the residual refrigerant in the filling gun head from overflowing, the filling gun head will be vacuumed, which will cause negative pressure in the filling gun, making it difficult for the filling gun head to be separated from the quick-plug male connector. Simply relying on manual extraction of the quick-plug male connector is time-consuming and labor-intensive, which reduces the efficiency of refrigerant filling. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that after the filling gun head is partially evacuated, negative pressure will be formed in the filling gun, making it difficult for the filling gun head to be separated from the quick-plug male head. A refrigerant filling gun needle mechanism with which the quick-plug male head can be easily and quickly separated, and a refrigerant filling assembly composed of the refrigerant filling gun needle mechanism are provided.

[0005] The technical solution adopted by the utility model is:

[0006] The ejector pin mechanism of the refrigerant filling gun includes:

[0007] The gun head housing is cylindrical and has a quick-connect socket at one end;

[0008] A filling ejector pin, one end of which is slidably embedded in the gun head housing; and

[0009] Ejector sleeve; slidably embedded in the gun head housing, and slidably sleeved on the filling ejector, and an automatic disengagement spring is provided between the ejector sleeve and the inner wall of the gun head housing;

[0010] When the quick-plug port is in a locked state, the automatic disengagement spring presses the ejector sleeve and forms a sealed cavity in the ejector sleeve; when the quick-plug port is unlocked, the ejector sleeve can move outwards through the automatic disengagement spring.

[0011] Furthermore, a bilaterally symmetrical sliding block is provided at the middle position of the filling ejector pin, and a sliding groove cooperating with the sliding block is provided on the gun head housing.

[0012] Furthermore, an annular convex rib is provided on the inner wall of the gun head shell, and one end of the automatic disengagement spring is connected to the annular convex rib.

[0013] Furthermore, an annular convex rib is provided on the inner wall of the gun head housing, and the filling ejector pin is slidably embedded in the middle of the annular convex rib.

[0014] Furthermore, a needle head with a larger radius is arranged on the end of the filling ejector pin extending into the ejector pin sliding sleeve.

[0015] Furthermore, an inner buckle is provided on the inner wall of the gun head housing close to the quick-insert port.

[0016] Refrigerant charging assembly, including:

[0017] Quick-plug male connector;

[0018] The gun head housing is cylindrical, and the quick-insert port at one end is used to insert the quick-insert male connector;

[0019] A filling ejector pin; one end of which is slidably embedded in the gun head housing and can be inserted into the self-sealing opening of the quick-insertion male plug; and

[0020] Ejector sleeve; slidably embedded in the gun head housing, and slidably sleeved on the filling ejector, and an automatic disengagement spring is provided between the ejector sleeve and the inner wall of the gun head housing;

[0021] Wherein, when the quick-connect male head is in a locked state, the automatic disengagement spring presses the ejector sleeve and the quick-connect male head and forms a sealed cavity in the ejector sleeve; when the quick-connect male head is unlocked, the ejector sleeve and the quick-connect male head can move outwards through the automatic disengagement spring.

[0022] Furthermore, a bilaterally symmetrical sliding block is provided at the middle position of the filling ejector pin, and a sliding groove cooperating with the sliding block is provided on the gun head housing.

[0023] Furthermore, a needle head with a larger radius is arranged on the end of the filling ejector pin extending into the ejector pin sliding sleeve.

[0024] Furthermore, an inner buckle is provided on the inner wall of the gun head housing close to the quick-insert port, and an outer buckle is provided on the outer wall of the quick-insert male head, and the quick-insert male head is locked by the cooperation of the inner buckle and the outer buckle.

[0025] The beneficial effects of the utility model are:

[0026] 1. The utility model reduces the space required for vacuuming the refrigerant filling machine and reduces the intensity of the negative pressure generated by arranging a gun head shell, an ejector sleeve and a charging ejector that cooperate with each other. At the same time, combined with the thrust accumulated by the automatic disengagement spring during the installation process, the quick-connect male connector can be pushed out of the gun head shell after the refrigerant filling gun is vacuumed. This solves the problem in the prior art that after the charging gun head is partially vacuumed, negative pressure is formed in the charging gun, making it difficult for the charging gun head to be separated from the quick-connect male connector.

[0027] 2. The utility model also reduces the space for vacuuming the refrigerant filling machine, reduces the intensity of the negative pressure generated, and saves the energy consumption of the vacuum pump of the refrigerant filling machine, thereby achieving the effect of energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a three-dimensional schematic diagram of the filling assembly of the embodiment of the utility model.

[0030] Figure 2 This is a cross-sectional view of the ejector mechanism in a separated state according to an embodiment of the utility model.

[0031] Figure 3 This is a cross-sectional view of the locking state of the ejector mechanism of the embodiment of the utility model.

[0032] Figure 4 It is a cross-sectional view of the ejector mechanism of the embodiment of the utility model in the filling state.

[0033] Reference numerals:

[0034] 100-gun head housing, 101-quick plug, 103-slide groove, 105-connecting port, 130-annular rib, 150-internal buckle;

[0035] 200-thimble sliding sleeve, 201-sealing chamber;

[0036] 300-filling ejector pin, 310-slider, 320-needle;

[0037] 400-Automatic disengagement spring;

[0038] 500-quick-plug male connector, 510-self-sealing connector, 550-external snap connector. DETAILED DESCRIPTION

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0041] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0042] See also Figure 1-4 The present embodiment provides a refrigerant filling gun ejector mechanism, which mainly includes: a gun head housing 100, an ejector sleeve 200 and a filling ejector 300. The ejector mechanism is mainly arranged at the gun head of the refrigerant filling gun, and is used to connect the quick-plug male connector 500. In the present embodiment, the quick-plug male connector 500 connected by the ejector mechanism is cylindrical, and a self-sealing opening 510 is arranged at the center position of the end surface facing the gun head of the refrigerant filling gun, which can be automatically closed and sealed after the filling ejector 300 passes through, so as to prevent the leakage of liquid or gaseous refrigerant and maintain the sealing of one end connected to the refrigeration system.

[0043] like Figure 1-Figure 4As shown in , the gun head housing 100 is cylindrical, one end of which is fixedly connected to the connecting pipe of the refrigerant filling machine, and a smaller connecting port 105 is provided on this end, and an annular convex rib 130 is provided on the inner wall of the gun head housing 100. At the same time, a quick plug port 101 is provided on the end of the gun head housing 100 away from the connecting pipe, which is used to insert the quick plug male connector 500. In this embodiment, the inner diameter of the gun head housing 100 is larger than the outer diameter of the quick plug male connector 500, so when the quick plug male connector 500 is inserted, a certain gap is left between the two. At the gap position, an inner buckle 150 integrally formed with the gun head housing 100 is provided on the inner wall of the gun head housing 100, and an outer buckle 550 integrally formed with the quick plug male connector 500 is provided on the outer wall. Among them, there are two inner buckles 150 and outer buckles 550, which are symmetrically arranged on both sides. When the quick-plug male connector 500 and the gun head shell 100 are rotated to the point where the inner buckle 150 and the outer buckle 550 are offset, the quick-plug male connector 500 can be inserted and pulled out of the gun head shell 100 without hindrance; when the outer buckle 550 is moved to the side of the connecting pipe of the inner buckle 150 close to the refrigerant filling machine, the quick-plug male connector 500 and the gun head shell 100 are rotated to align the inner buckle 150 and the outer buckle 550, and the quick-plug male connector 500 can be confined in the gun head shell 100, and the quick-plug male connector 500 and the quick-plug port 101 are in a locked state.

[0044] like Figure 1-Figure 4 As shown in , the filling ejector pin 300 is in the shape of a hollow tube for filling refrigerant, and one end of the filling ejector pin 300 is slidably embedded in the connecting port 105 at one end of the gun head housing 100 close to the connecting pipe, and is connected to the connecting pipe of the refrigerant filling machine. The other end of the filling ejector pin 300 extends into the gun head housing 100. When the quick plug male connector 500 is inserted into the gun head housing 100 and is locked, the filling ejector pin 300 can be inserted into the quick plug male connector 500 through the self-sealing port 510 on the end face of the quick plug male connector 500 to communicate with it, thereby filling refrigerant into the refrigeration system through the quick plug male connector 500. In this embodiment, during the process of inserting and removing the filling ejector pin 300 from the self-sealing port 510, in order to facilitate the user to move the position of the filling ejector pin 300 from the outside of the ejector pin mechanism, a bilaterally symmetrical rectangular parallelepiped slider 310 is also provided in the middle of the filling ejector pin 300. The slider 310 is integrally formed with the filling ejector pin 300 and extends outward in two opposite radial directions. At the same time, corresponding positions on both sides of the gun head housing 100 are provided with slide grooves 103 that cooperate with the slider 310, and the slider 310 extends to the outside of the side wall of the gun head housing 100 through the slide grooves 103, so that the user can conveniently control the movement of the filling ejector pin 300 by waving the slider 310 on the outside of the gun head housing 100.

[0045] like Figure 1-Figure 4As shown in the figure, the ejector sleeve 200 is cylindrical and slidably embedded in the gun head housing 100, and the ejector sleeve 200 has a hole adapted to fit the filling ejector 300 on the side facing the connecting tube, and is slidably sleeved on the filling ejector 300 through the hole. At the same time, an automatic disengagement spring 400 is also provided between the ejector sleeve 200 facing the connecting tube and the annular convex rib 130 on the inner wall of the gun head housing 100. Furthermore, when the quick-plug male connector 500 is inserted into the locked state position in the gun head housing 100, the part of its end surface except the self-sealing opening 510 will press against the side of the ejector sleeve 200 away from the connecting pipe, causing the ejector sleeve 200 to slide toward the side close to the connecting pipe, thereby compressing the automatic disengagement spring 400 to store force. When the quick-plug male connector 500 completes the locked state, the stored force automatic disengagement spring 400 will press the ejector sleeve 200 and the quick-plug male connector 500, so that the end surface of the quick-plug male connector 500, the inner wall of the ejector sleeve 200, and the end of the filling ejector 300 cooperate to form a sealed cavity 201 in the ejector sleeve 200. Through the sealed cavity 201, the refrigerant-filled connecting pipe and other spaces inside the gun head housing 100 are separated, thereby reducing the amount of vacuum required.

[0046] A specific implementation of this embodiment is: Figure 2 As shown, before use, the quick-insert male connector 500 and the gun head housing 100 are separated, and the ejector mechanism of this embodiment is in the separated state; then, the quick-insert male connector 500 and the gun head housing 100 are rotated to stagger the inner buckle 150 and the outer buckle 550, and then the quick-insert male connector 500 is pushed to move inward continuously and press against the ejector sleeve 200, so that the ejector sleeve 200 slides together, and at the same time, the automatic disengagement spring 400 is compressed to store force. Figure 3 As shown, when the outer buckle 550 is moved to the side of the inner buckle 150 close to the connection pipe of the refrigerant filling machine, the quick-insertion male connector 500 and the gun head housing 100 are rotated to align the inner buckle 150 and the outer buckle 550, and the quick-insertion male connector 500 can be restricted in the gun head housing 100. At this time, the ejector pin mechanism of this embodiment is locked; then, the slider 310 is moved to the plug-in side to drive the filling ejector pin 300 to be inserted into the quick-insertion male connector 500 through the self-sealing opening 510 and connected with it, and then the refrigerant filling can be started. Figure 4As shown, the refrigerant is filled in the filling state of the ejector mechanism of the present embodiment. After the refrigerant is filled, the slider 310 is first moved to one side of the connecting pipe to drive the filling ejector 300 to be pulled out of the quick-plug male connector 500 through the self-sealing opening 510 and return to the locked state; then, the vacuum pump of the refrigerant filling machine is started to evacuate the smaller space in the filling ejector 300 and the sealed cavity 201 to make the negative pressure formed weaker; then the quick-plug male connector 500 and the gun head shell 100 are rotated to stagger the inner buckle 150 and the outer buckle 550. At this time, since the locking state is released, there is no negative pressure in other spaces inside the gun head shell 100. The stored force of the spring will push the ejector sleeve 200 and the quick-plug male connector 500 to move outward and detach from the gun head shell 100. At this time, the negative pressure in the sealed cavity 201 is also weak, so that the quick-plug male connector 500 can be easily pulled out.

[0047] In this embodiment, the ejector pin mechanism of the refrigerant filling gun reduces the space for evacuating the refrigerant filling machine and reduces the intensity of the negative pressure generated by providing a gun head shell 100, an ejector sleeve 200 and a filling ejector pin 300 that cooperate with each other. At the same time, combined with the thrust accumulated by the automatic disengagement spring 400 during the installation process, the quick-connect male connector 500 can be pushed out of the gun head shell 100 after the refrigerant filling gun is evacuated. This solves the problem in the prior art that after the filling gun head is partially evacuated, negative pressure will be formed in the filling gun, making it difficult for the filling gun head to detach from the quick-connect male connector.

[0048] At the same time, in this embodiment, the space for evacuating the refrigerant filling machine is reduced, which reduces the intensity of the negative pressure generated and saves the energy consumption of the vacuum pump of the refrigerant filling machine, thereby achieving the effect of energy saving and emission reduction.

[0049] In this embodiment, the annular rib 130 may not be provided, and the other end of the automatic disengagement spring 400 may be directly fixed to the inner wall of the gun head housing 100. The annular rib 130 is provided on the one hand to better fix the other end of the automatic disengagement spring 400; on the other hand, the middle part of the filling ejector 300 is slidably embedded in the middle of the annular rib 130 to prevent the filling ejector from shifting and misaligning, so as to make the overall structure of the ejector mechanism more stable.

[0050] In this embodiment, in addition to the inner buckle 150 on the gun head housing 100 and the outer buckle 550 on the quick-connect male connector 500, other locking methods may be used, such as a locking nut, a buckle, a snap ring, etc. The advantages of providing the inner buckle 150 and the outer buckle 550 are simple structure, convenient locking, and the pressure applied by the automatic disengagement spring 400 can be used to make the locking more secure.

[0051] Preferably, in this embodiment, a needle head 320 may be provided on the end of the filling ejector pin 300 extending into the ejector sleeve 200. The needle head 320 is integrally formed with the filling ejector pin 300, but the needle head 320 has a larger radius and protrudes outward, thereby preventing the needle head 320 from being separated from the ejector sleeve 200 during movement, causing dislocation.

[0052] In the above embodiment, the ejector pin mechanism of the refrigerant filling gun used is matched with the quick-connect male connector 500 and can be manufactured and used as a refrigerant filling assembly.

[0053] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. The ejector pin mechanism of the refrigerant filling gun is characterized by: Include: The gun head housing (100) is cylindrical and has a quick-insert port (101) at one end; A filling ejector pin (300), one end of which is slidably embedded in the gun head housing (100); and An ejector sleeve (200) is slidably embedded in the gun head housing (100) and slidably sleeved on the filling ejector (300), and an automatic disengagement spring (400) is provided between the ejector sleeve (200) and the inner wall of the gun head housing (100); When the quick-insert port (101) is in a locked state, the automatic disengagement spring (400) presses the ejector sleeve (200) and forms a sealed cavity (201) inside the ejector sleeve (200); when the quick-insert port (101) is unlocked, the ejector sleeve (200) can move outwards via the automatic disengagement spring (400).

2. The ejector pin mechanism of the refrigerant filling gun according to claim 1, characterized in that: A bilaterally symmetrical sliding block (310) is disposed at the middle of the filling ejector pin (300), and a sliding groove (103) cooperating with the sliding block (310) is provided on the gun head housing (100).

3. The ejector pin mechanism of the refrigerant filling gun according to claim 1, characterized in that: An annular convex rib (130) is provided on the inner wall of the gun head housing (100), and one end of the automatic disengagement spring (400) is connected to the annular convex rib (130).

4. The ejector pin mechanism of the refrigerant filling gun according to claim 1, characterized in that: An annular convex rib (130) is provided on the inner wall of the gun head housing (100), and the filling ejector pin (300) is slidably embedded in the middle of the annular convex rib (130).

5. The ejector pin mechanism of the refrigerant filling gun according to claim 1, characterized in that: A needle head (320) with a larger radius is provided on the end of the filling ejector pin (300) extending into the ejector pin sliding sleeve (200).

6. The ejector pin mechanism of the refrigerant filling gun according to claim 1, characterized in that: An inner buckle (150) is provided on the inner wall of the gun head housing (100) close to the quick-insertion port (101).

7. A refrigerant filling assembly, characterized in that: Include: Fast plug male connector (500); The gun head housing (100) is cylindrical, and a quick-insertion port (101) at one end thereof is used to insert the quick-insertion male connector (500); A filling ejector pin (300); one end of which is slidably embedded in the gun head housing (100) and can be inserted into the self-sealing opening (210) of the quick-insertion male plug (500); and An ejector sleeve (200) is slidably embedded in the gun head housing (100) and slidably sleeved on the filling ejector (300), and an automatic disengagement spring (400) is provided between the ejector sleeve (200) and the inner wall of the gun head housing (100); When the quick-plug male connector (500) is in a locked state, the automatic disengagement spring (400) presses the ejector sleeve (200) and the quick-plug male connector (500) and forms a sealed cavity (201) in the ejector sleeve (200); when the quick-plug male connector (500) is unlocked, the ejector sleeve (200) and the quick-plug male connector (500) can move outwards via the automatic disengagement spring (400).

8. The refrigerant charging assembly according to claim 7, characterized in that: A bilaterally symmetrical sliding block (310) is disposed at the middle of the filling ejector pin (300), and a sliding groove (103) cooperating with the sliding block (310) is provided on the gun head housing (100).

9. The refrigerant charging assembly according to claim 7, characterized in that: A needle head (320) with a larger radius is provided on the end of the filling ejector pin (300) extending into the ejector pin sliding sleeve (200).

10. The refrigerant charging assembly according to claim 7, characterized in that: An inner buckle (150) is provided on the inner wall of the gun head housing (100) close to the quick-insert port (101), and an outer buckle (550) is provided on the outer wall of the quick-insert male head (500); the quick-insert male head (500) is locked by the cooperation of the inner buckle (150) and the outer buckle (550).

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