One-touch socket coupler and fluid supply kit

Abstract

To provide a one-touch socket coupler that can supply a lubricant or the like to an air conditioner compressor.SOLUTION: A one-touch socket coupler comprises: a socket coupler body 10 that has a locking mechanism 50 capable of maintaining a fitted state to a service port 60 of an air conditioner and can be fitted to the service port 60; a valve open pin 20 that is arranged inside the socket coupler body 10 and that, in the state that the socket coupler body 10 is fitted to the service port 60, opens a port-side check valve provided in the service port 60; an injection nozzle 30 that is provided at the tip of the socket coupler body 10 for injecting a fluid into the socket coupler body 10; and a socket-side check valve 40 that is provided between the valve open pin 20 and the injection nozzle 20, and that closes with an internal pressure on the service port 60 side by opening of the port-side check valve by the valve open pin 20 and opens with the injection pressure of the fluid into the injection nozzle 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a one-touch socket coupler and a fluid supply kit that can supply lubricant or the like to, for example, an air conditioner compressor. [Background technology]

[0002] Couplers are widely used as joints in fluid piping. In recent years, in air conditioners that have compressors, there has been a demand for supplying lubricants, etc. to the compressors to improve and maintain performance. There is a growing demand for couplers that can easily supply lubricants, etc. to the compressors. The applicant is aware of the following Patent Documents 1 to 3 as prior art documents related to couplers. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6360365 [Patent Document 2] Patent No. 5090940 [Patent Document 3] Patent No. 6613316

[0004] Patent Document 1 describes a quick coupler 11. This quick coupler 11 has a valve opening portion 11a that opens a check valve provided in an LP gas filling port C1. Patent Document 1 includes the following description.

[0023] Furthermore, the quick coupler 11 has a valve release portion 11a that releases a check valve provided in the LP gas filler port C1. Here, high-pressure gas is stored in the LP gas container C, and a check valve is provided to prevent the high-pressure gas from leaking out of the LP gas filler port C1. For this reason, the quick coupler 11 has the valve release portion 11a. The valve release portion 11a is, for example, a rod-shaped member, and when the quick coupler 11 is attached to the LP gas filler port C1, this rod-shaped member presses the check valve in the LP gas filler port C1 to open the check valve. This allows the LP gas in the LP gas container C to reach the flow path within the quick coupler 11.

[0005] Patent Document 2 describes a one-touch coupler that incorporates a check valve 25 that opens when a gas nozzle 10 is inserted. Patent Document 2 includes the following description.

[0011] Fig. 1 is a cross-sectional view showing a one-touch coupler according to one embodiment of the present invention in an unconnected state, and Fig. 2 is a cross-sectional view of the one-touch coupler shown in Fig. 1 in a connected state. The one-touch coupler shown here is extremely small, with a diameter of approximately 16 mm and a total length of approximately 24 mm, and is typically used in the carbon dioxide gas supply path from the pressure regulator of a small home beer server to the beer barrel. In this example, coupler body 20 has a built-in check valve 25, so that gas can be supplied immediately by connecting gas nozzle 10 to coupler body 20.

[0006] Patent Document 3 describes a coupling member in which the valve body 22 of the male coupling member 14 and the valve body 20 of the female coupling member 12 come into contact with each other, thereby opening both valves. Patent Document 3 includes the following description:

[0016] The illustrated pipe coupling 10 includes poppet-type valve elements 20, 22 for closing the fluid passages 12A, 14A of both the female coupling part 12 and the male coupling part 14. When the coupling parts 12, 14 are moved toward each other in the axial direction and connected, the valve elements 20, 22 come into contact with each other and stop moving in the axial direction. In this state, by further moving the coupling parts 12, 14, both valve elements 20, 22 are moved from the closed position, which prevents fluid flow, shown in Figures 1 and 2, to the open position, which allows fluid flow, shown in Figure 3. Summary of the Invention [Problem to be solved by the invention]

[0007] In the technology disclosed in Patent Document 1, when the quick coupler 11 is attached to the LP gas filler port C1, the valve opening portion 11a opens the check valve provided in the LP gas filler port C1. This type of quick coupler 11 extracts LP gas by attaching the quick coupler 11 to the LP gas filler port C1. Therefore, the object of the present invention, which is to supply lubricant and the like to the air conditioner compressor from a service port provided in the air conditioner, cannot be realized.

[0008] In the technology disclosed in Patent Document 2, a check valve 25 built into a one-touch coupler opens when a gas nozzle 10 is inserted. In other words, inserting a gas nozzle 10 into the one-touch coupler opens the check valve 25, ensuring communication. Therefore, the object of the present invention, which is to supply lubricant, etc. to the compressor of an air conditioner from a service port provided on the air conditioner, cannot be achieved.

[0009] The technology disclosed in the above-mentioned Patent Document 3 is a coupling member in which the valve element 22 of the male coupling member 14 and the valve element 20 of the female coupling member 12 come into contact with each other, opening both valves. In other words, by connecting the male coupling member 14 and the female coupling member 12, both valve elements 20, 22 open, ensuring communication. Therefore, the object of the present invention, which is to supply lubricant, etc. to the compressor of an air conditioner from a service port provided in the air conditioner, cannot be achieved.

[0010] The present invention has been made to solve the above problems and has the following objects. To provide a one-touch socket coupler and a fluid supply kit that can supply lubricant or the like to the compressor of an air conditioner from a service port provided in the air conditioner. [Means for solving the problem]

[0011] In order to achieve the above object, the one-touch socket coupler according to claim 1 employs the following configuration. a socket coupler body that can be fitted into the service port of the air conditioner by having a locking mechanism that can maintain a fitted state with the service port; a valve open pin that is disposed inside the socket coupler body and that opens a port-side check valve provided in the service port when the socket coupler body is fitted into the service port; an injection nozzle provided at a tip of the socket coupler body for injecting a fluid into the socket coupler body; A socket-side check valve is provided between the valve open pin and the injection nozzle, and closes due to the internal pressure on the service port side caused by the valve open pin opening the port-side check valve, and opens due to the injection pressure of fluid to the injection nozzle.

[0012] The one-touch socket coupler according to claim 2 employs the following configuration in addition to the configuration according to claim 1. There is no biasing member that applies a biasing force to the socket-side check valve.

[0013] The one-touch socket coupler according to claim 3 employs the following configuration in addition to the configuration according to claim 1 or 2. The injection nozzle has a fitting structure that fits an injection tool for injecting a fluid into the socket coupler body so that it will not come off due to the injection pressure of the fluid.

[0014] A fluid supply kit according to claim 4 includes the one-touch socket coupler according to claim 1, and an injection tool attached to the injection nozzle of the one-touch socket coupler for injecting a fluid into the socket coupler body. [Effects of the Invention]

[0015] The one-touch socket coupler described in claim 1 comprises a socket coupler body, a valve open pin, an injection nozzle, and a socket-side check valve. The socket coupler body has a locking mechanism. The locking mechanism maintains the socket coupler body fitted to the service port of an air conditioner, thereby allowing the socket coupler body to be fitted to the service port. The valve open pin is disposed inside the socket coupler body and opens the port-side check valve disposed in the service port when the socket coupler body is fitted to the service port. The injection nozzle is disposed at the tip of the socket coupler body and injects fluid into the socket coupler body. The socket-side check valve is disposed between the valve open pin and the injection nozzle and closes due to internal pressure on the service port side generated by the valve open pin opening the port-side check valve and opens due to injection pressure of fluid to the injection nozzle. The socket coupler body is fitted into the service port provided on the air conditioner. At this time, the locking mechanism maintains the fitted state of the socket coupler body into the service port. In this state, the valve open pin located inside the socket coupler body opens the port-side check valve provided in the service port. This causes internal pressure on the service port side caused by opening the port-side check valve to close the socket-side check valve, preventing gas leakage inside the air conditioner. From this state, when a fluid such as lubricant oil is injected into the injection nozzle, the injection pressure opens the socket-side check valve and the fluid is injected into the socket coupler body. This allows a fluid such as lubricant to be supplied to the air conditioner's compressor from the service port provided on the air conditioner via the one-touch socket coupler.

[0016] The one-touch socket coupler of claim 2 does not have a biasing member that applies a biasing force to the socket-side check valve. As described above, the socket-side check valve closes due to the internal pressure on the service port side caused by the valve open pin opening the port-side check valve, and opens due to the injection pressure of the fluid to the injection nozzle. In this way, by not having a biasing member that applies a biasing force to the socket-side check valve, it is possible to supply a fluid such as lubricant from the service port to the compressor with a simple structure.

[0017] In the one-touch socket coupler according to claim 3, the injection nozzle has a fitting structure that fits an injection tool for injecting fluid into the socket coupler body so that it does not come off due to the injection pressure of the fluid. The fitting structure prevents the injection tool for injecting fluid into the socket coupler body from coming off due to the injection pressure when injecting fluid into the socket coupler body, allowing the fluid to be injected safely.

[0018] The fluid supply kit of claim 4 includes the one-touch socket coupler of claim 1 and an injection tool. The injection tool is attached to the injection nozzle of the one-touch socket coupler and injects fluid into the socket coupler body. This allows a fluid such as a lubricant to be supplied to the compressor of the air conditioner from a service port provided in the air conditioner via the one-touch socket coupler. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a partial cross-sectional view illustrating the overall configuration of one embodiment of a one-touch socket coupler to which the present invention is applied. [Figure 2] FIG. 3 is an exploded view illustrating the one-touch socket coupler. [Figure 3] FIG. 10 is a diagram illustrating a socket member. [Figure 4] FIG. 10 is a diagram illustrating a slide sleeve. [Figure 5] FIG. 10 is a diagram illustrating a valve opening pin. [Figure 6] FIG. 10 is a diagram illustrating a socket-side check valve. [Figure 7] 1A and 1B are diagrams illustrating an embodiment of a fluid supply kit to which the present invention is applied. DETAILED DESCRIPTION OF THE INVENTION

[0020] This embodiment can supply a liquid such as a lubricant as a fluid to a compressor of an air conditioner such as a car air conditioner.

[0021] ▼One-touch socket coupler 1 1 and 2 are diagrams illustrating an embodiment of a one-touch socket coupler 1 to which the present invention is applied. Fig. 1 is a partial cross-sectional view, with the upper side of the figure showing the cross section and the lower side showing the side, separated by the center line. Fig. 2 is an exploded view.

[0022] [Overall structure] The one-touch socket coupler 1 of this embodiment includes a socket coupler body 10, a valve opening pin 20, an injection nozzle 30, and a socket-side check valve 40.

[0023] [Socket coupler body 10] The socket coupler body 10 has a socket member 70 and a locking mechanism 50.

[0024] [Socket member 70] 3A and 3B are diagrams illustrating the socket member 70. (A) is a side view, and (B) is a cross-sectional view.

[0025] The socket member 70 is a generally tapered cylindrical body. The injection nozzle 30 is provided at the tip of the tapered end. The internal space of the socket member 70 is connected to the injection passage 31 of the injection nozzle 30 and widens in multiple steps toward the rear, so that the service port 60 of an air conditioner (preferably on the low-pressure side: see Figure 7) can be inserted and fitted into the rear end opening 71.

[0026] The service port 60 is a conventionally known type provided in the gas flow path 65 of an air conditioner, and is provided with a port-side check valve (not shown) inside. The port-side check valve prevents gas from escaping from the gas flow path 65, and is equipped with a valve body (not shown) that closes due to internal pressure. When the valve body is pressed from the opening of the service port 60 with a pin or the like, the port-side check valve opens, and gas in the gas flow path 65 is ejected from the service port 60.

[0027] A circumferential groove 72 is formed on the inner peripheral surface of the large diameter side of the socket member 70, and an O-ring 73 is fitted into the circumferential groove 72. When the service port 60 is inserted and fitted into the rear end opening 71, the O-ring comes into close contact with the outer peripheral surface of the service port 60 to prevent leakage of gas or fluid.

[0028] [Locking mechanism 50] The locking mechanism 50 can maintain the fitted state of the socket coupler body 10 in the service port 60. The locking mechanism 50 allows the one-touch socket coupler 1 to be fitted into the service port 60.

[0029] The lock mechanism 50 includes a slide sleeve 51 and a lock ball 52 .

[0030] 4A and 4B are diagrams illustrating the slide sleeve 51. (A) is a side view, and (B) is a cross-sectional view.

[0031] The slide sleeve 51 is roughly cylindrical and slidably fitted onto the outer peripheral surface of the large diameter side of the socket member 70. The slide sleeve 51 is slidable forward and backward (in the axial direction) between two retaining rings 53 attached to the socket member 70. The retaining rings 53 are fitted into a circumferential groove 74 formed on the outer periphery of the large diameter part of the socket member 70.

[0032] A circumferential groove 75 is formed on the outer periphery of the large-diameter portion of the socket member 70, between the two retaining rings 53, and an O-ring 54 is fitted into this circumferential groove 75. Grease (not shown) is applied to this O-ring 54. The slide sleeve 51 slides in the axial direction with its inner circumferential surface in close contact with the O-ring 54. As a result, when the slide sleeve 51 slides, the O-ring 54 and the grease act to create an appropriate sense of resistance.

[0033] Furthermore, a notch 55 that widens the inner diameter is formed on the inner periphery of the rear opening of the slide sleeve 51. The notch 55 forms a space that allows the lock ball 52 to escape to the unlocked position (outside in the radial direction) when the slide sleeve 51 slides toward the tip end. Furthermore, when the slide sleeve 51 slides rearward, the lock ball 52 abuts against the inner periphery of the slide sleeve 51 and moves to the locked position (toward the center in the radial direction).

[0034] In this example, four lock balls 52 are arranged at equal intervals in the circumferential direction. The four lock balls 52 are accommodated in accommodation holes 76 provided in the wall of the large-diameter portion of the socket member 70. Therefore, the four accommodation holes 76 are arranged at equal intervals in the circumferential direction. The accommodation holes 76 are cone-shaped through-holes that are larger on the outer periphery side of the wall of the socket member 70 and smaller on the inner periphery side. The lock balls 52 are capable of moving in the radial direction within the accommodation holes 76. As a result, the lock balls 52 accommodated in the accommodation holes 76 from the outer periphery side of the socket member 70 protrude into the internal space of the socket member 70 without rolling out when in the locked position.

[0035] The locking mechanism 50 is in the locked position when the slide sleeve 51 is slid rearward, and the locking ball 52 is positioned toward the center in the radial direction and protrudes into the internal space of the socket member 70. In this state, the locking ball 52 fits into a circumferential groove 61 (see FIG. 7) formed on the outer periphery of the service port 60, thereby entering a locked state. In this locked state, the fitted state of the socket coupler body 10 in the service port 60 is maintained.

[0036] Furthermore, the locking mechanism 50 is in the unlocked position when the slide sleeve 51 is slid toward the tip, and the lock balls 52 are positioned radially outward and do not protrude into the internal space of the socket member 70. In this state, the lock balls 52 are disengaged from the circumferential grooves 61 (see FIG. 7) formed on the outer periphery of the service port 60, thereby releasing the lock. With this unlocking, the socket coupler body 10 fitted into the service port 60 can be removed.

[0037] [Valve release pin 20] 5A and 5B are diagrams illustrating the valve open pin 20. (A) is a side view, (B) is a view seen from the valve open pin 20 side, (C) is a view seen from the fitting portion 21 side, which will be described later, and (D) is a cross-sectional view.

[0038] The valve open pin 20 is cylindrical and provided so as to protrude from the rear surface of a fitting portion 21 that fits into the inner circumferential surface of the socket member 70. The fitting portion 21 is block-shaped and has step portions 22 formed at the top and bottom in the figure that fit into fitting steps 77 provided on the inner circumferential surface of the socket member 70. The fitting steps 77 are provided on the tip side of the circumferential groove 72 of the socket member 70, and fit into the step portions 22 at that position to fix the fitting portion 21.

[0039] The valve open pin 20 is disposed inside the socket coupler body 10, and when the socket coupler body 10 is fitted into the service port 60, it pushes and opens the valve body of a port side check valve (not shown) provided in the service port 60. In other words, when the socket coupler body 10 is fitted into the service port 60 and the port side check valve is opened, the air conditioner gas will try to come out, but the internal pressure of this gas will close the socket side check valve 40, thereby preventing the gas from escaping.

[0040] The surface on the tip side of the fitting portion 21 forms an abutment surface 23 that abuts against the socket side check valve 40 and regulates the socket side check valve 40. In other words, the socket side check valve 40 opens by moving rearward as will be described later, and the amount of movement at that time is regulated by the abutment surface 23. As a result, when the socket side check valve 40 is closed again by the internal gas pressure on the air conditioner side, the amount of movement of the socket side check valve 40 needs to be small, and the amount of gas leakage when the socket side check valve 40 operates can be reduced.

[0041] Furthermore, both side surfaces 24 of the fitting portion 21 are configured to provide gaps between them and the inner peripheral surfaces of the socket coupler body 10 to allow fluid to pass through.

[0042] [Injection nozzle 30] The injection nozzle 30 is provided at the tip of the socket coupler body 10 and is used to inject a fluid (liquid such as lubricating oil in this example) into the socket coupler body 10.

[0043] The injection nozzle 30 has an injection passage 31 that communicates from a tip opening 32 to the inside of the socket coupler body 10. The injection nozzle 30 also has a fitting structure 35 into which an injection tool 80 for injecting a fluid into the socket coupler body 10 fits so as not to come off due to the injection pressure of the fluid. In this example, the fitting structure 35 is a male screw provided on the outer circumferential surface of the injection nozzle 30.

[0044] [Socket side check valve 40] 6A and 6B are diagrams illustrating the socket-side check valve 40 (with the O-ring 41, which will be described later, removed), in which (A) is a side view and (B) is a cross-sectional view.

[0045] The socket-side check valve 40 is provided between the valve open pin 20 and the injection nozzle 30. The socket-side check valve 40 includes an O-ring 41 serving as a sealing member and a circumferential groove 42 into which the O-ring 41 is fitted. The socket-side check valve 40 closes when the O-ring 41 is in close contact with a valve seat 78 provided on the inner circumferential surface of the socket member 70, and closes when the O-ring 41 is separated from the valve seat 78. In other words, the socket-side check valve 40 moves toward the tip within the internal space of the socket member 70 to close, and moves rearward to open. When the socket-side check valve 40 moves rearward, it abuts against the abutment surface 23 of the fitting portion 21, restricting the movement of the socket-side check valve 40.

[0046] Therefore, the socket side check valve 40 moves to the tip side and closes due to the internal pressure on the service port 60 side caused by the valve open pin 20 opening the port side check valve. In other words, when the socket coupler body 10 is fitted into the service port 60, the port side check valve opens and air conditioner gas attempts to escape, but the internal pressure of this gas closes the socket side check valve 40, preventing the gas from escaping.

[0047] Furthermore, the socket-side check valve 40 moves rearward and opens due to the injection pressure of the fluid into the injection nozzle 30. That is, as will be described later, the socket-side check valve 40 opens due to the injection pressure when injecting fluid into the injection nozzle 30 using a fluid injection kit, and the fluid is injected into the gas flow path 65 (see FIG. 7) of the air conditioner through the service port 60.

[0048] The socket-side check valve 40 is cylindrical and open to the rear behind the circumferential groove 42 into which the O-ring 41 fits, which reduces the weight of the socket-side check valve 40 itself and makes it easy to move (i.e., open and close) due to the gas pressure or fluid injection pressure described above.

[0049] The socket-side check valve 40 moves toward the tip and closes due to the internal pressure on the service port 60 side, without being subjected to a biasing force from a biasing member such as a spring, and moves rearward and opens due to the injection pressure of fluid into the injection nozzle 30. As such, the one-touch socket coupler 1 of this embodiment does not have a biasing member that applies a biasing force to the socket-side check valve 40. The socket-side check valve 40 has an extremely simple structure, and opens and closes due to the internal gas pressure and the injection pressure of fluid.

[0050] ▼Fluid injection kit FIG. 7 is a diagram illustrating an embodiment of a fluid supply kit to which the present invention is applied.

[0051] The fluid supply kit of this embodiment includes the one-touch socket coupler 1 described above and an injection tool 80 that is attached to the injection nozzle 30 of the one-touch socket coupler 1 and injects fluid into the socket coupler body 10.

[0052] In this example, the injection tool 80 includes a syringe-like injection tool 81 and a connecting pipe 86 .

[0053] The syringe-like injection device 81 is configured so that a fluid such as lubricating oil is filled inside a syringe 82, and the fluid is forced out from a tip opening 84 by pressing a plunger 83. The tip opening 84 is formed with a mating structure (in this example, a female thread that threads onto the male thread: not shown) that fits into the mating structure 35 of the injection nozzle 30.

[0054] The tip opening 84 of the syringe-like injection tool 81 is fitted into the injection nozzle 30 (the fitting structure 35 of the injection nozzle 30 is fitted into the fitted structure of the tip opening 84), and the plunger 83 is pressed to inject the fluid from the tip opening 84 into the internal space of the socket coupler body 10. The injection pressure at this time opens the socket-side check valve 40, and the fluid is supplied from the service port 60 through the air conditioner gas flow path 65 to the compressor.

[0055] The connecting pipe 86 can be used as needed.

[0056] Connecting pipe 86 includes pipe 87, a front connector 88, and a rear connector 89. Front connector 88 is provided with a mating structure (in this example, a female thread that threadably couples with the male thread; not shown) similar to that of front opening 84. Rear connector 89 is provided with mating structure 89A similar to mating structure 35 of injection nozzle 30.

[0057] The rear end connector 89 is fitted into the tip opening 84 of the syringe-like injection tool 81 (fitting structure 89A of the rear end connector 89 into the fitted structure of the tip opening 84), and the tip connector 88 is fitted into the injection nozzle 30 (fitting structure 35 of the injection nozzle 30 into the fitted structure of the rear end connector 89). In this state, by pressing the plunger 83, the fluid can be injected into the internal space of the socket coupler body 10 via the connecting pipe 86.

[0058] [Effects of the embodiment] By adopting the above-described configuration, this embodiment provides the following advantageous effects.

[0059] The one-touch socket coupler 1 of the above embodiment comprises a socket coupler body 10, a valve open pin 20, an injection nozzle 30, and a socket-side check valve 40. The socket coupler body 10 has a locking mechanism 50. The locking mechanism 50 can maintain a fitted state with respect to a service port 60 of an air conditioner, thereby allowing the socket coupler body 10 to be fitted into the service port 60. The valve open pin 20 is disposed inside the socket coupler body 10 and opens the port-side check valve provided in the service port 60 when the socket coupler body 10 is fitted into the service port 60. The injection nozzle 30 is provided at the tip of the socket coupler body 10 and injects fluid into the socket coupler body 10. The socket side check valve 40 is located between the valve open pin 20 and the injection nozzle 30, and closes due to the internal pressure on the service port 60 side caused by the valve open pin 20 opening the port side check valve, and opens due to the injection pressure of the fluid into the injection nozzle 30. The socket coupler body 10 is fitted into the service port 60 provided on the air conditioner. At this time, the locking mechanism 60 maintains the fitted state of the socket coupler body 10 in the service port 60. In this state, the valve open pin 20 arranged inside the socket coupler body 10 opens the port-side check valve provided in the service port 60. As a result, the internal pressure on the service port 60 side caused by opening the port-side check valve closes the socket-side check valve 40, preventing gas leakage from inside the air conditioner. From this state, when a fluid such as lubricant oil is injected into the injection nozzle 30, the injection pressure opens the socket-side check valve 40, and the fluid is injected into the socket coupler body 10. As a result, a fluid such as lubricant can be supplied to the air conditioner's compressor from the service port 60 provided on the air conditioner via the one-touch socket coupler 1.

[0060] The one-touch socket coupler 1 of the above embodiment does not have a biasing member that applies a biasing force to the socket-side check valve 40. As described above, the socket-side check valve 40 closes due to the internal pressure on the service port 60 side caused by the valve open pin 20 opening the port-side check valve, and opens due to the injection pressure of the fluid to the injection nozzle 30. In this way, by not having a biasing member that applies a biasing force to the socket-side check valve 40, it is possible to supply a fluid such as lubricant from the service port 60 to the compressor with a simple structure.

[0061] In the one-touch socket coupler 1 of the above embodiment, the injection nozzle 30 has a fitting structure 35 that fits with an injection tool 80 for injecting fluid into the socket coupler body 10 so that it does not come off due to the injection pressure of the fluid. The fitting structure 35 prevents the injection tool for injecting fluid into the socket coupler body 10 from coming off due to the injection pressure when injecting fluid into the socket coupler body 10, so that the fluid injection work can be carried out safely.

[0062] The fluid supply kit of the above embodiment includes the one-touch socket coupler 1 described in claim 1 and an injection tool 80. The injection tool 80 is attached to the injection nozzle 30 of the one-touch socket coupler 1 and injects fluid into the socket coupler body 10. This allows a fluid such as a lubricant to be supplied to the compressor of the air conditioner from a service port 60 provided in the air conditioner via the one-touch socket coupler 1.

[0063] [Modification] The above describes a particularly preferred embodiment of the present invention, but the present invention is not intended to be limited to the embodiment shown, and can be modified and implemented in various ways, and the present invention is intended to encompass various modified embodiments.

[0064] For example, in the above embodiment, a liquid such as lubricating oil is supplied to the compressor of an air conditioner, but the fluid to be supplied is not limited to a liquid, and gas, slurry, etc. may also be used.

[0065] Furthermore, in the above embodiment, the injection tool 80 of the fluid supply kit is described as comprising a syringe-like injection tool 81 and a connecting pipe 86, but the injection tool 80 can also be composed of just the syringe-like injection tool 81. [Explanation of symbols]

[0066] 1: One-touch socket coupler 10: Socket coupler body 20: Valve release pin 21: Fitting part 22:Dan section 23: Contact surface 24: Side 30: Injection nozzle 31: Injection path 32: Tip opening 35: Interlocking structure 40: Socket side check valve 41: O-ring 42: Peripheral groove 50: Locking mechanism 51: Slide sleeve 52: Rock Ball 53: Retaining ring 54: O-ring 55:Notch 60: Service port 61: Circumferential groove 65: Gas flow path 70: Socket parts 71: Rear end opening 72: Circumferential groove 73: O-ring 74: Circumferential groove 75: Circumferential groove 76: Storage hole 77: Mated stage 78: Valve seat 80: Injection tool 81: Syringe-like injection device 82: Syringe 83: Plunger 84:Tip opening 86: Connecting pipe 87: Pipe 88: Tip connector 89: Rear end connector 89A: Interlocking Structure

Claims

1. a socket coupler body that can be fitted into the service port of the air conditioner by having a locking mechanism that can maintain a fitted state with the service port; a valve open pin that is disposed inside the socket coupler body and that opens a port-side check valve provided in the service port when the socket coupler body is fitted into the service port; an injection nozzle provided at a tip of the socket coupler body for injecting a fluid into the socket coupler body; a socket-side check valve that is provided between the valve-opening pin and the injection nozzle, that closes due to internal pressure on the service port side caused by the valve-opening pin opening the port-side check valve, and that opens due to the injection pressure of fluid to the injection nozzle; A one-touch socket coupler characterized by the above.

2. No biasing member is provided to apply a biasing force to the socket-side check valve.

2. The one-touch socket coupler according to claim 1.

3. The injection nozzle has a fitting structure that fits an injection tool for injecting a fluid into the socket coupler body so that it does not come off due to the injection pressure of the fluid.

3. The one-touch socket coupler according to claim 1 or 2.

4. The one-touch socket coupler according to claim 1; an injection tool attached to the injection nozzle of the one-touch socket coupler for injecting a fluid into the socket coupler body; A fluid supply kit comprising:

Images