Refrigerant filling device

Abstract

The invention provides a refrigerant filling device, and belongs to the technical field of gas filling devices. The problem of how to prolong the service life of the hose is solved. A refrigerant filling device comprises a shell and a valve body located in the shell, a pressing handle located at the front end of the shell is arranged on the shell, an air outlet pipe is arranged on the valve body, and a hose is sleeved on the air outlet pipe, and the refrigerant filling device is characterized in that the front end of the shell extends downwards to form a limiting handle which is located below the pressing handle; the limiting handle is provided with a grabbing and buckling part located below the pressing handle and a caulking groove with a rear opening, and the hose is bent towards the lower portion of the limiting handle and embedded in the caulking groove. The hose penetrates out of the lower portions of the pressing handle and the limiting handle, interference between the hose and the pressing handle caused by the switch is avoided, the bending amplitude of the hose is limited through the limiting handle, and then the service life of the hose is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of gas filling equipment, and in particular relates to a refrigerant filler. Background Art

[0002] As a tool used for maintenance of refrigeration equipment and charging of refrigerants such as Freon, the refrigerant filling device is suitable for the maintenance and maintenance of various refrigeration equipment. Among them, automobile air conditioners are used frequently as refrigeration equipment. The refrigerant inside will decrease accordingly with the frequency of use of the air conditioner and other comprehensive factors. In order to accurately control the amount of refrigerant filled, large-scale Freon filling equipment is usually used. However, since large-scale filling equipment occupies a large area and is difficult to operate, with the continuous increase in the number of cars and the growing demand for filling equipment in the automobile repair and maintenance industry, there is an urgent need for a portable, efficient and easy-to-operate filling tool.

[0003] In order to solve the above problems, an automobile Freon ventilation device is provided in the existing design. The valve on the top of the refrigerant tank is pushed open by pressing the valve stem with a handle. Under the action of gas pressure, the refrigerant therein is filled into the refrigeration equipment through the connecting pipe part and the filling head on the valve body, thereby completing the filling of the refrigerant. The connecting pipe part and the filling head are connected by a hose. While being able to withstand high pressure and low temperature, it can bypass obstacles and improve work efficiency. However, since the hose is made of soft material, it is easy to swing during transportation and use, resulting in frequent bending, which affects the service life of the hose. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose a refrigerant filler. The technical problem to be solved by the present invention is: how to increase the service life of the hose.

[0005] The objective of the present invention can be achieved through the following technical solutions: a refrigerant filler, comprising an outer shell and a valve body located in the outer shell, the outer shell being provided with a pressing handle located at the front end, the valve body being provided with an air outlet pipe, the air outlet pipe being sleeved with a hose, and characterized in that the front end of the outer shell extends downward to form a limit handle, the limit handle being located below the pressing handle, and the limit handle being provided with a grabbing portion located below the pressing handle and a recessed groove opening at the rear, the hose being bent toward the bottom of the limit handle and embedded in the recessed groove.

[0006] In the case where a longer hose is required in the filler to bypass obstacles and complete the filling, the existing filler uses a hose that passes through the front end and is then connected to the equipment to be filled. Since the hose will be bent during use, it is easy to leak due to fatigue and other reasons caused by excessive bending. For this reason, the present application, on the basis of the existing, bends one end of the hose sleeved with the air outlet pipe downward, and embeds the downward bent part in the embedding groove, limits the hose by a limiting handle and the embedding groove, thereby reducing the bending amplitude of the hose during transportation and use, avoiding leakage caused by excessive bending amplitude, and improving the service life of the hose.

[0007] It is worth mentioning that the present application not only limits the hose by means of a limit handle and an embedding groove to increase the service life of the hose, but also bends the hose downward so that the hose passes out from under the pressing handle and the limit handle, thereby increasing the visual range of the front end of the filler, and provides a grab portion under the pressing handle so that the user can place part of their fingers on the grab portion when in use, supporting the fingers during the pressing process, thereby facilitating better force in the process of pressing the valve stem and being more ergonomic.

[0008] In the above-mentioned refrigerant filler, the rear end of the shell is provided with an inner concave portion that can fit with the user's thumb and toe, the end of the limit handle is a catch portion and extends below the pressing handle, and the inner concave portion is higher than the catch portion. By arranging the catch portion at the end of the limit handle and extending below the pressing handle, a position for the user to place his fingers is provided, and the inner concave portion that can fit with the thumb and toe is arranged at the rear end, and the catch portion is arranged below the inner concave portion, which conforms to the finger position distribution of the user when grasping, can reduce the learning difficulty, and conforms to ergonomics.

[0009] In the above-mentioned refrigerant filler, the gripping part is provided with two protrusions, and the two protrusions cooperate to form a depression for gripping. By providing the depression surrounded by the two protrusions on the gripping part, the contact area with the fingers is increased, thereby improving the reliability of gripping.

[0010] In the above-mentioned refrigerant filler, the pressing handle is hingedly connected to the housing, a certain movable spacing is provided between the pressing rod of the pressing handle and the limit handle, the pressing rod is tilted, and the bottom end of the pressing rod is protruded toward the front end of the housing compared to the catch portion. By leaving a certain movable space between the pressing rod and the limit handle, and tilting the pressing rod and protruding the catch portion, the force line of the user in the process of pressing the handle is in line with ergonomics.

[0011] In the above refrigerant filler, a valve stem that can move up and down is provided in the valve body, the air outlet pipe extends into the embedded groove, and the air outlet pipe and the valve stem are arranged obliquely. By arranging the air outlet pipe and the valve stem obliquely, it is avoided that the bending angle of the hose in the limit handle is too large, which causes local pressure concentration during the filling process, and the service life of the hose is increased.

[0012] In the above refrigerant filler, the outlet pipe is located at the front end of the valve body, the rear end of the valve body is provided with a pressure detection port, and the outlet pipe and the pressure detection port are arranged in a staggered manner. The outlet pipe and the pressure detection port are arranged in a staggered manner, thereby reducing the influence of the pressure at the outlet pipe on it and improving the accuracy of filling.

[0013] In the above-mentioned refrigerant charger, a smart clip for detecting the temperature of the air outlet is provided at the top of the shell.

[0014] In the above-mentioned refrigerant filler, a through groove is provided on the limit handle to connect the embedding groove with the outside, and the through groove is located above the catch portion.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. Based on the existing technology, the present application places the pressing handle and the limiting handle in front, so that the hose is bent under the pressing handle and the limiting handle, and the hose is embedded in the embedding groove of the limiting handle, thereby avoiding interference between the pressing handle and the hose and limiting the hose, so as to reduce the service life of the hose during transportation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of this embodiment;

[0018] Figure 2 is an exploded schematic diagram of this embodiment;

[0019] Figure 3 It is a cross-sectional schematic diagram of only the filler part of this embodiment;

[0020] Figure 4 It is a cross-sectional schematic diagram of the embodiment with a refrigerant tank installed.

[0021] In the figure, 1, outer shell; 1a, limit handle; 1a1, catch part; 1a1a, protrusion; 1a1b, depression; 1a2, embedding groove; 1a3, through groove; 1b, recessed part; 1c, installation part; 2, pressing handle; 2a, pressing rod; 2b, hinged part; 3, valve; 3a, air outlet pipe; 3b, valve stem; 3c, pressure detection port; 4, hose; 5, filling head; 6, smart clamp; 7, pressure gauge; 8, refrigerant tank. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 as well as Figure 2 As shown, a refrigerant filler includes a shell 1 and a smart clamp 6 and a pressure gauge 7 located above the shell 1. A pressing handle 2 and a limit handle 1a are provided at the front end of the shell 1. The limit handle 1a is located below the pressing handle 2, and the lower end of the limit handle 1a extends downward to form a grab portion 1a1. The grab portion 1a1 is provided with two protrusions 1a1a, and the two protrusions 1a1a cooperate to form a depression 1a1b for placing fingers. An inner recess 1b is provided at the rear end of the shell 1, and the inner recess 1b is higher than the depression 1a1b on the grab portion 1a1. One end of the hose 4 is located in the refrigerant filler, and the other end passes through the bottom of the grab portion 1a1 and is connected to the filling head 5. The smart clamp 6 is located above the pressing handle 2, and the pressure gauge 7 is located above the inner recess 1b.

[0024] It is worth mentioning that Figure 2 As shown, the shell 1 includes a shell body located on the left and right of the pressing handle 2, and a valve 3 is provided below the pressing handle 2. The valve 3 includes a valve stem 3b, an air outlet pipe 3a and a pressure detection port 3c. The air outlet pipe 3a and the pressure detection port 3c are respectively located at the front and rear ends of the valve stem 3b, wherein the air outlet pipe 3a is inclined relative to the axis of the valve stem 3b, and the hose 4 connected to the air outlet pipe 3a is bent downward. In addition, the pressing handle 2 includes a pressing rod 2a and a hinged portion 2b, the pressing rod 2a is located at the front end of the filler, and the hinged portion 2b is clamped in the shell 1, and the limit handle 1a and the embedded groove 1a2 and the through groove 1a3 on the limit handle 1a are all formed by a combination of parts extending from the front ends of the left and right shell bodies.

[0025] like Figure 3 and Figure 4 As shown, a valve 3 for controlling filling or closing is clamped on the mounting portion 1c of the housing 1, a valve stem 3b is provided in the middle of the valve 3, an air outlet pipe 3a and a pressure detection port 3c are respectively provided on the left and right sides of the valve stem 3b, wherein the air outlet pipe 3a and the pressure detection port 3c are arranged in a staggered manner, the opening position of the air outlet pipe 3a on the valve 3 is higher than the opening position of the pressure detection port 3c, the bottom of the valve 3 is connected to the refrigerant tank 8, and the front end is connected to the hose 4 and the filling head 5 through the air outlet pipe 3a, the hose 4 is bent downward along the contour of the embedding groove 1a2 of the limit handle 1a, and is embedded in the embedding groove 1a2 behind the catch portion, wherein a through groove 1a3 is also provided on the limit handle 1a, the cross-section of the pressing rod 2a is U-shaped, and the bottom end is open, and the embedding groove 1a2 is connected to the outside through the through groove 1a3 and the opening at the bottom end of the pressing rod 2a.

[0026] It is worth mentioning that the front end of the valve 3 is provided with a pressing handle 2 and a limit handle 1a, the pressing rod 2a in the pressing handle 2 is located above the limit handle 1a, and the bottom end of the limit handle 1a is provided with a grabbing portion 1a1 for resting fingers, and the grabbing portion 1a1 extends a distance below the pressing rod 2a, wherein the bottom end of the pressing rod 2a is protruded relative to the protrusion 1a1a on the grabbing portion 1a1, and there is a movable distance between the pressing rod 2a and the limit handle 1a, the limit handle 1a and the pressing rod 2a on the pressing handle 2 are tilted forward relative to the valve stem 3b, and the rear end of the valve 3 is provided with a pressure gauge 7 located at the top and an inner recess 1b located below the pressure gauge 7.

[0027] In summary, the refrigerant filler pushes the valve stem 3b in the valve 3 downward through the pressing handle 2 hingedly connected to the shell 1, thereby opening the valve 3 at the top of the refrigerant tank 8. Under the action of the pressure difference between the equipment to be filled and the refrigerant tank 8, the refrigerant passes through the valve 3 and the hose 4 in sequence, and is then injected into the refrigeration equipment through the filling head 5. Among them, on the basis of the existing refrigerant filler, the present application advances the pressing handle 2 and makes the hose 4 pass out from under the pressing handle 2. This avoids the interference between the pressing handle 2 and the hose 4 during use due to the hose 4 passing out from the front end, thereby extending the service life of the hose 4 and providing the user with a better field of view for easy observation.

[0028] More importantly, a limit handle 1a integrally formed with the shell 1 is provided below the pressing handle 2, and a certain movable spacing is reserved between the limit handle 1a and the pressing rod 2a of the pressing handle 2. The hose 4 is bent toward the bottom of the limit handle 1a, and is embedded in the embedding groove 1a2 opened at the rear of the catch portion 1a1. While the limit handle 1a is used to limit the swing range of the pressing rod 2a, the hose 4 is fixed by embedding it in the embedding groove 1a2 at the rear end of the catch portion 1a1. In the process of using the refrigerant filler, the filling head 5 is affected by the refrigerant tank 8 located below the valve 3, so that the filling head 5 can only bend forward, and by embedding it in the embedding groove 1a2 at the rear end of the catch portion 1a1, the hose 4 is prevented from bending too far forward to cause fatigue, thereby improving the service life of the hose 4.

[0029] It is worth mentioning that the rear end of the injector is provided with an inner recess 1b which fits into the base of the user's thumb, and a depression 1a1b for resting fingers is provided on the gripping portion 1a1. While improving the stability of the user's grip on the injector, the inner recess 1b is higher than the depression 1a1b of the gripping portion 1a1, which is consistent with the height difference between the base of the thumb and the ring finger and the little finger of the palm, and the pressing handle 2 is arranged above the limit handle 1a, and the pressing rod 2a is inclined relative to the valve stem 3b, so that the swing direction of the pressing handle 2 is the same as the force direction of the finger muscles, which is convenient for the user to press the pressing rod 2a and conforms to the force direction of ergonomics.

[0030] In addition, the air outlet pipe 3a is arranged at a relative tilt to prevent the hose 4 from bending too little and causing excessive local stress and rupture during the filling process, and a through groove 1a3 located above the catch portion 1a1 is opened at the bottom of the embedding groove 1a2 on the limit handle 1a, which is convenient for adjusting the extended length of the hose 4, and a certain movable distance is provided between the pressing handle 2 and the limit handle 1a, providing sufficient movable space for the pressing rod 2a to ensure that the filler can be used normally.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0032] Although this article uses more terms such as 1, housing; 1a, limit handle; 1a1, catch; 1a1a, protrusion; 1a1b, depression; 1a2, embedding groove; 1a3, through groove; 1b, inner concave portion; 2, pressing handle; 2a, pressing rod; 2b, hinged portion; 3, valve; 3a, air outlet pipe; 3b, valve stem; 3c, pressure detection port; 4, hose; 5, filling head; 6, smart clamp; 7, pressure gauge; 8, refrigerant tank, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A refrigerant filler, comprising a housing (1) and a valve (3) located in the housing (1), wherein the housing (1) is provided with a pressing handle (2) located at the front end, the valve (3) is provided with an air outlet pipe (3a), and a hose (4) is sleeved on the air outlet pipe (3a), characterized in that: The front end of the housing (1) extends downward to form a limit handle (1a), the limit handle (1a) is located below the pressing handle (2), and the limit handle (1a) is provided with a catch portion (1a1) located below the pressing handle (2) and a recess (1a2) opened at the rear, and the hose (4) is bent toward the bottom of the limit handle (1a) and embedded in the recess (1a2).

2. The refrigerant charger according to claim 1, characterized in that: The rear end of the housing (1) is provided with an inner recess (1b) that can fit into the base of a user's thumb, the end of the limit handle (1a) is a catch portion (1a1) that extends downwardly from the pressing handle (2), and the inner recess (1b) is higher than the catch portion (1a1).

3. The refrigerant charger according to claim 2, characterized in that: The catch portion (1a1) is provided with two protrusions (1a1a), and the two protrusions (1a1a) cooperate to form a depression (1a1b) for catch.

4. The refrigerant charger according to claim 2, characterized in that: The pressing handle (2) is hingedly connected to the housing (1), and a certain movable spacing is provided between the pressing portion of the pressing handle (2) and the limiting handle (1a). The pressing portion is arranged at an angle, and the bottom end of the pressing portion protrudes toward the front end of the housing (1) compared to the catch portion (1a1).

5. The refrigerant charger according to any one of claims 1 to 4, characterized in that: The valve (3) is provided with a valve stem (3b) that can move up and down, the air outlet pipe (3a) extends into the embedded groove (1a2), and the air outlet pipe (3a) and the valve stem (3b) are arranged obliquely.

6. The refrigerant charger according to claim 2, characterized in that: The housing (1) is also provided with a pressure gauge (7) at the rear end and a connecting portion at the bottom, and the valve (3) is provided with a pressure detection port (3c) connected to the pressure gauge (7) at the rear end.

7. The refrigerant charger according to claim 6, characterized in that: The air outlet pipe (3a) is located at the front end of the valve (3), and the air outlet pipe (3a) and the pressure detection port (3c) are arranged in a staggered manner.

8. The refrigerant charger according to claim 1, characterized in that: The top end of the housing (1) is provided with an intelligent clip (6) for detecting the temperature of the air outlet.

9. The refrigerant charger according to claim 1, characterized in that: The limit handle (1a) is provided with a through groove (1a3) for connecting the embedding groove (1a2) with the outside, and the through groove (1a3) is located above the catch portion (1a1).

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