JP3211595U - Coupler and plug connectable to the coupler, connection fitting including the coupler and the plug, refrigerant supply container including the plug, and refrigerant recovery container - Google Patents

Abstract

A coupler capable of suppressing leakage of solvent gas with a simple structure, and a connection fitting including the coupler and a plug are provided. A coupler body includes a tubular coupler body, a lock sleeve serving as a lock control means for a plug, and a coupler valve body. The coupler body includes a vent hole portion 150 that can be opened and closed by the coupler valve body. The formed partition portion 15, the front end side connecting portion 1 a serving as the inner space on the front end side, and the rear end side connecting portion 1 b serving as the inner space on the rear end side, the partition portion being an inclined surface that expands in diameter on the rear end side 151, the front end side connecting portion is provided with a first seal member 105 at a predetermined distance from the partition portion, the coupler valve body is provided with a second seal member 110 on its side peripheral surface, and the rear end side connecting portion is provided. The inner peripheral surface of the portion is provided with a female screw 11b, the rear end connecting portion is screwed into the female screw and has a ventilation path, and a second elastic member between the fixing member and the coupler valve body. 104, and the tip of the coupler valve body protrudes from the vent hole to the tip side. A coupler 1, which was with the structure. [Selection] Figure 1

Description

  The present invention relates to a coupler mainly used for a refrigerant gas recovery and filling device, a plug corresponding to the coupler, a connection fitting including the coupler and the plug, a refrigerant supply container including the plug, and a refrigerant recovery container.

  Refrigerant gas used in an air conditioner such as an automobile is periodically collected (partially regenerated) and filled with new or regenerated refrigerant gas in order to maintain the cooling performance of the air conditioner. In order to perform such recovery / filling (including partial regeneration) of the refrigerant gas, a refrigerant gas filling / recovery device (including a refrigerant gas filling / recovery device) is used.

  In the refrigerant gas filling and recovering apparatus, a coupler is used for connecting pipes, purging air mixed in the refrigerant gas, and the like.

  As such a coupler, for example, a pipe joint composed of a socket and a plug, and a cylindrical spacer formed of a material having a low frictional resistance through a seal ring on the outer peripheral surface of a sleeve valve provided in the socket A pipe joint is known in which the outer peripheral surface of the sleeve valve in a non-connected state is inserted to a length that is one-half or more of the entire length of the inner peripheral surface of the cylindrical spacer (for example, Patent Documents). 1).

Utility Model Registration No. 2604307

  According to the said device, it is thought that a fixed effect is recognized about the reliable sealing property of a socket and a plug. However, according to the structure of the above-described device, since the number of parts is large and the structure is complicated, there is a demand for a simpler and cheaper coupler or pipe joint structure.

By the way, in order to supply new refrigerant gas, the refrigerant supply container filled with the refrigerant gas is connected to a refrigerant recovery and filling device (for example, a car air conditioner) through a manifold. At this time, since it is necessary to prevent air in the air piping from the refrigerant supply container to the manifold from being mixed into the refrigerant recovery and filling device, an operation of releasing (purging) the air to the outside is performed. . By this operation, a small amount of refrigerant gas is unintentionally released into the atmosphere.
In addition, when the refrigerant gas in the refrigerant supply container decreases and is replaced with a new refrigerant supply container, the refrigerant gas remaining in the connected piping or the like is released to the outside.

  Some refrigerants are flammable, and the refrigerant itself is an expensive gas. Therefore, it is desirable that the amount of the purged refrigerant can be reduced from the viewpoint of safety and economy.

  The present invention has been made in view of the above circumstances, and the present invention intends to solve the provision of a coupler capable of suppressing the leakage of solvent gas and a connection fitting provided with the coupler and the plug while having a simple structure. Let it be an issue.

  Moreover, after solving the said subject, this invention makes it the subject which a device intends to solve the provision of the coupler which can reduce the quantity of the purged refrigerant | coolant, and the connection metal fitting provided with the said coupler and a plug.

  Another object of the present invention is to provide a refrigerant supply container having a plug corresponding to the coupler and a refrigerant recovery container having a plug corresponding to the coupler.

  The present invention relates to a coupler comprising a tubular coupler body, a lock control means for enabling locking and releasing of a plug coupled to the coupler body, and a coupler valve body provided in the coupler body. The coupler main body includes a partition portion formed therein with a vent hole portion that can be opened and closed by a coupler valve body, a distal end side connecting portion that is an inner space on the distal end side from the partition portion, and a rear end side from the partition portion. A rear end side connection portion serving as an internal space, and the partition portion includes a sloped surface continuously expanding from the vent hole portion on the rear end side surface, and the front end side connection portion includes the partition. A first seal member inscribed in the coupler main body at a predetermined distance from the portion, the coupler valve body has a second seal member on a side peripheral surface thereof, and is provided on an inner peripheral surface of the rear end side connecting portion. Includes a female screw, and the rear end connecting portion includes a female screw. A fixing member having a ventilation path and a second elastic member between the fixing member and the coupler valve body, and the second sealing member is separated by a biasing force of the second elastic member. Based on the above-mentioned coupler, wherein the vent hole portion is closed in contact with the inclined surface, and the tip of the coupler valve body protrudes from the vent hole portion toward the tip side. Means for solving the problem.

  The present invention also provides a connection fitting comprising the above coupler and a plug that can be attached to and detached from the coupler, wherein the plug has a plug-side vent and a plug that can contact the coupler valve body. A connection fitting having a side abutting surface is used as means for solving the above-mentioned problems.

  Further, the present invention is premised on the idea of the connection fitting, the plug includes a plug valve body that can open and close the plug-side vent hole, and the plug-side contact surface is a tip surface of the plug valve body, The plug valve body is provided with a third seal member at the periphery thereof, and the connecting valve has a structure in which the tip of the plug valve body protrudes to the tip side from the plug-side vent hole, and the plug has a center in the tip part. In order to solve the above-mentioned problems, a connection fitting having a flat plug-side contact surface at a position and a plug-side vent hole provided at a circumferential position around the plug-side contact surface is provided. This means.

  Further, the present invention is based on the above-described concept of the coupler, and has the plug-side abutting surface and a plug-side vent hole formed on the plug-side abutting surface. A plug valve body that can be opened and closed, wherein the plug-side contact surface is a front end surface of the plug valve body, and the plug valve body includes a first plug having a third seal member at a peripheral edge thereof; and the plug A plug-side vent hole formed on the plug-side contact surface and a flat plug-side contact surface at the center of the tip. The coupler valve body and the plug-side abutment surface can be brought into contact with any of the second plugs provided with plug-side vent holes at circumferential positions on the circumference. This coupler is a means for solving the above problems.

  In the present invention, any one of the plugs, the first plug, or the second plug corresponding to any one of the couplers described above is used as a means for solving the above-described problem.

  Further, the present invention provides a refrigerant supply container provided with the above plug (that is, any plug corresponding to any one of the above couplers, or a first plug or a second plug), and means for solving the above problems. To do.

  Further, the present invention provides a refrigerant recovery container including the plug (that is, any plug corresponding to any one of the couplers described above, or a first plug or a second plug), and means for solving the above-described problem. To do.

According to the present invention, in a coupler comprising a tubular coupler body, a lock control means for enabling locking and releasing of a plug coupled to the coupler body, and a coupler valve body provided in the coupler body. The coupler main body includes a partition portion formed therein with a vent hole portion that can be opened and closed by a coupler valve body, a distal end side connecting portion serving as an inner space on the distal end side from the partition portion, and a rear end from the partition portion A rear end side connecting portion serving as an internal space on the side, and the partitioning portion includes an inclined surface continuously expanding from the vent hole portion on the rear end side surface, and the front end side connecting portion includes A first seal member inscribed in the coupler main body at a predetermined distance from the partition portion; the coupler valve body includes a second seal member on a side peripheral surface thereof; and an inner periphery of the rear end side connection portion A female screw is provided on the surface, and the rear end connecting portion is provided with the female screw. A fixing member screwed into the child and having a ventilation path; and a second elastic member between the fixing member and the coupler valve body, and the second sealing member is biased by the second elastic member Since the abutting portion is in contact with the inclined surface of the partition portion, the vent hole portion is closed, and the coupler valve body has a tip protruding from the vent hole portion toward the tip side. While having a simple structure with a small number of points, the second sealing member performs sealing in the closed state of the vent hole, and the first sealing member performs sealing to the outside when the vent hole is opened, It is possible to suppress inadvertent leakage of the refrigerant.
Moreover, an excellent valve structure can be realized simply by introducing a coupler valve body equipped with a second seal member into the rear end side connecting portion and interposing a second elastic member and screwing a fixing member. Is possible.

  Further, according to the present invention, on the premise of the configuration of the coupler, a connection fitting comprising the coupler and a plug that can be attached to and detached from the coupler, wherein the plug has a plug-side vent hole at a tip thereof, Since the connection fitting has a plug-side contact surface capable of contacting the coupler valve body, the effect of the coupler can be obtained, and the vent portion can be formed by the second seal member together with the coupler. It is possible to perform sealing in the closed state.

  According to the present invention, on the premise of the invention related to the connection fitting, the plug includes a plug valve body capable of opening and closing the plug-side vent hole, and the plug-side contact surface is a tip surface of the plug valve body. The plug valve body is provided with a third sealing member at the periphery thereof, and the tip of the plug valve body is a connection fitting that protrudes to the tip side from the plug-side vent hole. In addition to the effects of the metal fittings, it is possible to realize a two-way opening / closing operation in which the flow path is released by pressing the coupler valve body and the plug valve body together with a simple configuration.

  Further, according to the present invention, on the premise of the configuration of the coupler and the basic connecting metal fitting, the plug has a flat plug-side contact surface at the center position of the tip portion, and the plug-side contact surface Alternatively, since it is a connection fitting having a configuration in which a plug-side vent hole portion is provided at a circumferential position around the plug-side contact surface, the effects of the coupler and the basic connection fitting are achieved. Even when the plug does not have a valve body, the coupler valve body disposed at the center position of the coupler and the plug-side contact surface abut on each other so that the coupler valve body can be opened. It is possible to realize the opening and closing of the road with a simple configuration.

Further, according to the present invention, on the premise of the configuration of the coupler, the plug-side abutting surface and the plug-side vent hole formed on the plug-side abutting surface can be opened and closed. The plug-side contact surface is a tip end surface of the plug valve body, and the plug valve body includes a first plug having a third seal member at its periphery, and the plug-side contact surface A plug-side vent hole formed on the plug-side contact surface and a flat-plate-like plug-side contact surface at the center position of the tip thereof, and around the plug-side contact surface Since the coupler valve body and the plug-side abutment surface can be brought into contact with any of the second plugs provided with the plug-side vent holes in the circumferential position, both Can be applied to both open / closed and single-way open / closed plugs. Although it is a structure, the second sealing member performs sealing in the closed state of the vent hole portion, and the first sealing member performs sealing to the outside when the vent hole portion is opened, thereby inadvertently supplying the refrigerant. It is possible to suppress leakage.
Moreover, an excellent valve structure can be realized simply by introducing a coupler valve body equipped with a second seal member into the rear end side connecting portion and interposing a second elastic member and screwing a fixing member. Is possible.

  Further, according to the present invention, a plug corresponding to any one of the couplers, or any one of the plugs constituting the connection fitting, or the first plug or the second plug is selected. Therefore, by adopting one of the above-described plugs, it is possible to realize a configuration that can handle both the two-way opening and the one-way opening and closing in relation to the coupler.

  Even when the refrigerant machine is equipped with either a two-way open / close or one-way open / close plug, when the refrigerant gas in the refrigerant supply container is reduced and replaced with a new refrigerant supply container, the connected pipe When the refrigerant gas remaining on the outside is released to the outside, the amount of refrigerant released to the outside can be reduced by using the plug in the refrigerant supply container and providing a coupler corresponding to the hose side. It is.

  The plug includes a plug valve body that can open and close the plug-side vent hole, the plug-side contact surface is a front end surface of the plug valve body, and the plug valve body has a third seal member at a peripheral edge thereof. In the case where the plug valve body has a configuration in which the tip of the plug valve body protrudes toward the tip side from the plug-side vent hole, the plug valve body can be purged by pressing the protruding tip of the plug valve body with a finger. Since the purge is very small, it is possible to reduce the amount of refrigerant released to the outside.

  Further, according to the present invention, the refrigerant supply container including the plug or the refrigerant recovery container including the plug is configured, so that the second sealing member in the coupler corresponds to the coupler and the air hole is provided. In addition to sealing the coupler and the plug in a closed state, the first seal member seals the gap between the coupler and the plug when the vent hole is opened, thereby inadvertent leakage of the refrigerant. Can be suppressed.

It is the side view made into the partial cross section of the coupler which concerns on the Example of this invention. FIG. 2A is a front view, FIG. 2B is a left side view, and FIG. 2C is a rear view showing the coupler valve body in the coupler of FIG. 1. It is the side view made into (a) partial cross section of the 1st plug which has the plug valve body which concerns on the Example of this invention, (b) It is a front view. It is (a) front view, (b) left side view, and (c) rear view showing the plug valve body in the first plug. It is the side view made into (a) partial cross section of the 2nd plug which does not have the plug valve body which concerns on the Example of this invention, (b) It is a front view. It is the side view made into the partial cross section which shows the connection metal fitting which consists of the said coupler and the said plug which has a coupler valve body based on the Example of this invention. It is the side view made into the partial cross section which shows the connection metal fitting which consists of the said coupler and the said plug which does not have a coupler valve body based on the Example of this invention. It is explanatory drawing which shows the state before connecting the refrigerant | coolant supply container which mounted | wore with the 1st plug which has the plug valve body based on the Example of this invention, and a coupler. It is explanatory drawing which shows the structure which connected the refrigerant | coolant supply container equipped with the 1st plug which has the plug valve body based on the Example of this invention, and the manifold. It is explanatory drawing which shows the structure which connected the refrigerant | coolant collection | recovery container equipped with the 1st plug which has the plug valve body which concerns on the Example of this invention, and the manifold to the refrigerant | coolant collection | recovery apparatus, respectively. It is each front view which shows the other Example of the 2nd plug which does not have the plug valve body which concerns on other Examples of this invention, (a) A plug side vent hole part is in the range of the plug side contact surface. (B) a plug provided with a plug-side abutting surface at the center and provided with a plug-side vent hole at only one location around the plug; (c) a plug-side abutting surface provided at the center at a plurality of locations around the plug-side abutting surface; It is a front view which shows the plug which provided the plug side ventilation hole part.

  Hereinafter, a coupler according to an embodiment of the present invention and a connection fitting S composed of the coupler and a plug will be described. Note that the present invention is not limited to the following embodiments, and extends to shapes, structures, and combinations whose design has been changed within the scope of the technical idea disclosed in the present invention.

  As shown in FIG. 1, a coupler 1 according to an embodiment of the present invention is a coupler body 10, a lock sleeve 14 that is a lock control means, and a first elastic member that biases the lock sleeve 14 forward. A first coil spring 106, a coupler valve body 11, and a second coil spring 104, which is a second elastic member that biases the coupler valve body 11 forward, are provided.

The coupler body 10 includes a partition portion 15 in which a vent hole portion 150 that can be opened and closed by the coupler valve body 11 is formed, a distal end side connecting portion 1a that is an inner space on the distal end side of the partition portion 15, The rear end side connection part 1b used as the internal space of the rear end side from the partition part 15 is provided.
The partition portion 15 has an inclined surface 151 that continuously increases in diameter from the vent hole portion 150 on the rear end side surface.

  The inner peripheral surface 10b of the rear end side connecting portion 1b is screwed with the fixing member 12 and also screwed with an external male screw (for example, a connecting pipe or a male screw for connecting the refrigerant supply container 3). A female screw 11b is provided.

  The inner side surface of the distal end side connecting portion 1a has four through holes 102 at equal intervals on the same circumference. The diameter of the through hole 102 is larger than the inner side surface than the inner surface side. is there. The steel ball 103 having a diameter larger than the inner surface diameter 170 and smaller than the outer surface diameter 171 is stored in the location. The steel ball 103 abuts against the lock sleeve 14 in a normal state, and a part of the steel ball 103 protrudes from the inner surface of the distal end side connecting portion 1a. For this reason, the distal end side connecting portion 1a is configured such that the plug 2 cannot be inserted from the outside, or the already connected plug 2 is locked with the coupler main body 10 (not disconnected).

  The lock sleeve 14 is formed with a sleeve inner surface recess 140 having a depth less than the diameter of the steel ball 103 on the inner surface of the tip. When the lock sleeve 14 is moved backward against the first coil spring 106, the steel ball 103 can move to the sleeve inner surface recess 140, and the distal end side connecting portion 1a is opened.

  As shown in FIGS. 2A to 2C, the coupler valve body 11 includes a coupler distal end portion 111 having a cross-shaped coupler groove portion 112, a coupler central portion 115 having a second seal member 110, a second A coupler rear end portion 114 having a valve body latching portion 113 serving as a latching means for the second coil spring 104, which is an elastic member, is provided.

  The coupler valve body 11 and the second coil spring 104 are inserted and arranged from the rear end side connecting portion 1b of the coupler main body 10, and the fixing member 12 is screwed from the rear end side connecting portion 1b side, whereby the fixing member and The coupler valve body 11 and the second coil spring 104 are installed between the partition portion 15 in the coupler main body 10.

  The fixing member 12 is a member for holding the second coil spring 104, a male screw that engages with the female screw 11 b on the outer peripheral surface, and a holding portion for holding the second coil spring 104; A ventilation hole 120 is provided for ventilation.

  With the above configuration, the second seal member biased by the second elastic member 104 is in contact with the inclined surface 151 of the partition portion 15 to close the vent hole portion 150.

  Next, the plug 2 corresponding to the coupler 1 according to the present embodiment will be described. For the sake of explanation, the plug 2 having the plug valve body 21 is hereinafter referred to as the first plug 2A, and the plug 2 having no plug valve body 21 is hereinafter referred to as the second plug 2B.

  As shown in FIG. 3, the first plug 2 </ b> A according to the embodiment of the present invention includes a plug body 20, a plug valve body 21, a plug side fixing member 22, and the plug valve body 21 and the plug side fixing member 22. A third coil spring 204 serving as a third elastic member that is disposed between the plug valve body 21 and presses the plug valve body 21 forward, a third seal member 210 provided on a side surface of the plug valve body 21, and the plug body And a fourth seal member 205 provided in the rear end side connecting portion 2b of 20A.

  The plug main body 20A is a substantially cylindrical member having a small diameter compared with the rear end side of the front end side. The front end side connecting portion 2a having an opening for guiding the plug valve body 21 on the front end side is provided, and the rear end side connecting portion 2b is provided on the rear end side. The side surface includes a convex portion 206 that is continuous in the circumferential direction, and a concave portion 207 that is adjacent to the rear of the convex portion 206 and is continuous in the circumferential direction.

  In the present embodiment, the convex portion 206 has a function of coming into contact with the coupler 1 and reducing leakage of refrigerant gas or the like. Further, the recess 207 secures a space for holding the steel ball 103 when the coupler 1 is locked. A female screw 202 is provided on the inner peripheral surface at the center in the longitudinal direction, and a female screw 201 is provided on the inner peripheral surface on the rear end side. A space is formed between the female screws 201 and 202, and a fourth seal member 205 is stored therein.

  As shown in FIG. 4, the plug valve body 21 is basically configured in common with the coupler valve body 11, and includes a plug distal end portion 211 having a cross-shaped plug groove portion 212 and a third seal member 210. A plug rear end portion 214 having a valve body latching portion 215 that serves as a latching means between the plug central portion 216 and the third coil spring 204 that is a third elastic member is provided.

  The fixing member is a member for holding the third coil spring 204, and its front end surface is used as a contact surface of the third coil spring 204. A male screw is provided on the outer peripheral surface of the fixing member. Moreover, the ventilation hole 220 for ventilation | gas_flowing is provided.

  As described above, the plug valve body 21 is provided inside the distal end side of the plug body 20A in the first plug 2A. The plug-side fixing member 22 is screwed into the plug-side female screw 202 at the center position in the longitudinal direction inside the plug body 20A.

  With this configuration, the plug valve body 21 is biased to the distal end side by the third coil spring 204 locked to the plug valve body locking portion 215, and the plug end 211 of the plug valve body 21 is connected to the plug body 20A. It is held in a state of protruding from the opening at the tip. At this time, the plug valve body 21 is closed by the third seal member 210 of the plug valve body 21 closing the opening.

  By pushing the plug valve body 21 from the outside against the spring elastic force of the third coil spring 204, the plug valve body 21 can be temporarily opened. This operation can be performed when purging internal gas (refrigerant gas, air) when the first plug 2A is connected to the refrigerant supply container 3, for example.

  Further, as shown in FIG. 5, the second plug 2B according to the embodiment of the present invention includes a plug body 20B and a fourth seal member 205 provided in the rear end side connecting portion 2b of the plug body 20B. Prepare.

  The outer shape of the plug body 20B is common except for the shape of the tip of the plug body 20A and the presence or absence of the plug valve body 21. That is, the side surface has a convex portion 206 that is continuous in the circumferential direction and a concave portion 207 that is adjacent to the rear of the convex portion 206 and is continuous in the circumferential direction. In the present embodiment, the convex portion 206 has a function of coming into contact with the coupler 1 and reducing leakage of refrigerant gas or the like. Further, the recess 207 secures a space for holding the steel ball 103 when the coupler 1 is locked.

  On the other hand, the plug main body 20B does not have the plug valve body 21, and does not have the configuration of each part used in association therewith. The plug body 20B has a flat plug-side abutting surface 213 at the center of the plug tip 211, and the plug side is located on the same circumferential position around the same plane as the plug-side abutting surface 213. In this configuration, two vent holes 217 are provided.

Next, the connection structure of the plug and coupler described above will be described.
When connecting the coupler 1 and the first plug 2A according to the above embodiment, the lock sleeve 14 of the coupler 1 is moved rearward to release the lock of the internal steel ball 103 so as to be movable. In this state, the coupler valve body 11 and the plug valve body 21 are brought into contact with each other from the distal end side of the first plug 2A with respect to the distal end side connecting portion 1a of the coupler 1. The flow path is released as the distance between the coupler 1 and the first plug 2A decreases while the contact state between the coupler valve body 11 and the plug valve body 21 is maintained. As the plug valve body 21 advances, the steel ball 103 fits into the recess 207, and the lock sleeve 14 biased by the first coil spring 106 moves forward and is connected and fixed (see FIG. 6). ).

  When the connection between the first plug 2A and the coupler 1 is released, the coupler can be easily removed by moving the lock sleeve 14 of the coupler rearward and making the steel ball 103 movable. .

On the other hand, the connection structure between the coupler 1 and the second plug 2B according to the above embodiment can be realized by the following procedure.
First, the lock sleeve 14 of the coupler 1 is moved rearward to release the lock of the internal steel ball 103 so that it can move.

In this state, the coupler 1 is introduced from the distal end side of the second plug 2B to the distal end side connecting portion 1a of the coupler 1, and the coupler valve body 11 and the plug side abutting surface 213 of the second plug 2B are brought into contact with each other. .
When the plug-side contact surface 213 pushes the coupler valve body 11, the coupler valve body 11 moves backward against the bias of the second coil spring 104, and the flow path is released. As the plug valve body 21 advances, the steel ball 103 fits into the recess 207, and the lock sleeve 14 biased by the first coil spring 106 moves forward and is connected and fixed (see FIG. 7). ).

  Even when the connection between the second plug 2B and the coupler 1 is released, the coupler 1 can be easily removed by moving the lock sleeve 14 of the coupler 1 rearward so that the steel ball 103 can be moved. Can do.

  In the present invention, as shown in FIG. 8, the plug 2 is provided in a refrigerant supply container 3 (so-called service can etc.) for supplying refrigerant gas to an air conditioner (such as an air conditioner) such as an automobile. can do. The refrigerant supply container 3 shown in the present embodiment has a configuration in which a container main body for storing refrigerant gas is provided inside, and a joint 32 with a valve is provided on the upper part thereof. Further, the first plug 2 </ b> A is used as the plug 2.

  When the manual valve of the valve-equipped joint 32 and the first plug 2A are connected, air exists in the first plug 2A. Therefore, the manual valve is opened and the tip of the first plug 2A is opened. By pressing and purging, a slight amount of air in the first plug 2A is discharged, and the refrigerant gas is slightly purged.

As shown in FIG. 9, the refrigerant supply container 3 provided with the first plug 2A has, for example, the coupler 1 according to the embodiment attached to one end of the refrigerant supply hose H1 when supplying the refrigerant to the air conditioner 7. The other end of the refrigerant supply hose H1 is connected to the manifold 5.
The manifold 5 and the air conditioner 7 are connected by a high pressure side hose H3 and a low pressure side hose H4. The coupler 1 of the refrigerant supply hose H1 and the first plug 2A of the refrigerant supply container 3 are connected.

  Here, when the refrigerant gas in the refrigerant supply container decreases and is replaced with a new refrigerant supply container, conventionally, the refrigerant is purged by the manifold 5 and remains in the connected refrigerant supply hose H1 or the like. According to the configuration of the present invention, the gas is to be discharged to the outside. According to the configuration of the present invention, the coupler 1 attached to the refrigerant supply hose H1 and the first plug 2A of the refrigerant supply container are connected to each other by a two-way opening / closing mechanism. In addition to the use of the above, the second seal member 110 performs sealing in the closed state of the vent hole portion 150 while the first seal member 105 opens the vent hole portion 150 while having a simple structure with a small number of parts. By performing sealing to the outside at the time, it is possible to suppress inadvertent leakage of the refrigerant.

  And before connecting the new refrigerant | coolant supply container 1 with which the refrigerant | coolant was filled, the front-end | tip of the 1st plug 2A can be pressed and a trace amount refrigerant gas can be purged. By subsequently connecting to the coupler, it is not necessary to purge the refrigerant gas in the refrigerant supply hose H1, and it is possible to greatly reduce the release of the refrigerant gas to the outside.

  Further, when connecting, in addition to using the two-way opening / closing mechanism, the second seal member 110 allows the ventilation hole portion 150 to be formed by a combination of the coupler 1 and a simple structure with a small number of parts. In addition to performing sealing in the closed state, the first sealing member 105 performs sealing to the outside when the vent hole 150 is opened, so that inadvertent leakage of the refrigerant gas can be suppressed.

  The coupler 1 can also be connected to the refrigerant supply container 3 having a configuration in which the second plug 2B not having the plug valve body 21 is mounted. Even in this case, the coupler 1 according to the embodiment has a simple structure with a small number of parts, and the second seal member 110 performs sealing in the closed state of the vent hole 150 and the first seal member 105. However, by performing sealing to the outside when the vent hole 150 is opened, it is possible to suppress inadvertent leakage of the refrigerant gas. Moreover, since it can connect as a one-way opening / closing mechanism in connection with the said 2nd plug 2B, the versatility of the coupler 1 can be improved.

Moreover, in this invention, as shown in FIG. 10, it can be set as the structure provided with the said plug 2 in the refrigerant | coolant collection | recovery container 4. As shown in FIG. The refrigerant recovery container 4 according to the embodiment has a configuration in which a manual valve 41 is provided on the upper part of the container body 40 via a joint 42 with a valve. The valve-equipped joint 42 is connected to the plug 2 according to the embodiment.
Here, the plug 2 can be either the first plug 2A having a two-way opening / closing mechanism or the second plug 2B having a one-way opening / closing mechanism.

When recovering the refrigerant from the air conditioner, for example, as shown in FIG. 10, the coupler 1 according to the above embodiment is attached to one end of the refrigerant recovery hose H2, and is connected to the other end of the refrigerant recovery hose H2. Other couplers can be attached. The other coupler is connected to the high-pressure side plug of the refrigerant recovery device 6. The low pressure side plug of the refrigerant recovery device 6 is configured to be connected to the manifold via a refrigerant recovery low pressure hose H5.
The manifold 5 and the air conditioner 7 are connected by a high pressure side hose H3 and a low pressure side hose H4. The coupler 1 of the refrigerant recovery hose H2 and the plug of the refrigerant recovery container 4 are connected.

  The refrigerant recovery container 4 using the first plug 2A of the two-way opening / closing mechanism can be used in combination with the coupler 1 in addition to using the two-way opening / closing mechanism in both connection and desorption. While the structure is simple and has a small number of points, the second seal member 110 performs sealing in the closed state of the vent hole 150, and the first seal member 105 seals to the outside when the vent hole 150 is opened. By doing so, it is possible to suppress inadvertent leakage of the refrigerant gas.

  Even in the configuration in which the second plug 2B of the one-way opening / closing mechanism is used for the refrigerant recovery container 4, the second seal member 110 seals the vent hole portion 150 in a closed state while having a simple structure with a small number of parts. In addition, when the first seal member 105 performs sealing to the outside when the vent hole 150 is opened, inadvertent leakage of the refrigerant gas can be suppressed. Moreover, since it can connect as a one-way opening / closing mechanism in connection with the said 2nd plug 2B, the versatility of the coupler 1 can be improved.

  Further, the coupler 1, the first plug 2A, and the second plug 2B according to the present invention can be used for other pipes related to refrigerant recovery and charging, and can greatly reduce the discharge of refrigerant gas to the outside and the number of parts. It is also excellent in that it can be provided at a low cost because it can be realized with a simple configuration with little.

  Moreover, although the example of the 2nd plug 2B which concerns on this invention was shown above, the position of the plug side contact surface 213 and the position and quantity of the plug side vent-hole part 217 are the same as that of the said 2nd plug 2B. As long as the function of pressing the coupler valve body 11 is provided, it can be set freely. For example, as shown in FIG. 11A, it is possible to provide a plug-side vent hole 217 within the range of the plug-side contact surface 213 (in this case, one or a plurality of plug-side vent holes may be provided). It is possible to provide only one plug side vent hole 217 around the plug side contact surface 213 provided in the center as shown in FIG. It is also possible to provide a plug-side vent hole 217 at the location. Further, in the plug according to FIG. 11A, the distal end of the coupler valve body 11 of the coupler 1 has a shape that does not block the plug-side vent hole portion 217 of the plug, so that the air permeability and the coupler valve body can be obtained. It is possible to realize both of 11 pressings.

H1 Refrigerant supply hose H2 Refrigerant recovery (high pressure) hose H3 High pressure side hose H4 Low pressure side hose H5 Refrigerant recovery low pressure hose S Connection fitting 1 Coupler (socket)
1a Tip side coupling (coupler side)
1b Rear end side connection (coupler side)
DESCRIPTION OF SYMBOLS 10 Coupler main body 10b Inner peripheral surface 11b Female screw 102 Through hole 103 Steel ball 104 Second elastic member (second coil spring)
105 First seal member 106 First elastic member (first coil spring)
DESCRIPTION OF SYMBOLS 11 Coupler valve body 110 2nd sealing member 111 Coupler tip part 112 Coupler groove part 113 Valve body latching part 114 Coupler rear end part 115 Coupler center part 12 Fixing member 14 Lock control means (lock sleeve)
15 Partition part 150 Ventilation hole part 151 Inclined surface 170 Diameter (inner surface side)
171 Diameter (outer side)
2 plugs (first plug 2A, second plug 2B)
2a Tip side connector (plug side)
2b Rear end side connecting part (plug side)
20 Plug body (Plug body 20A, Plug body 20B)
201 female screw 202 female screw 204 Third elastic member (third coil spring)
205 4th seal member 206 convex part 207 concave part 21 plug valve body 210 third seal member 211 plug front end part 212 plug groove part 213 plug side contact surface 214 plug rear end part 215 plug valve body locking part 216 plug central part 217 Plug side vent 22 Plug side fixing member 3 Refrigerant supply container 30 Container body 31 Manual valve 32 Joint with valve 4 Refrigerant recovery container 40 Container body 41 Manual valve 42 Joint with valve 5 Manifold 6 Refrigerant recovery device 7 Air conditioning equipment

The present invention, the refrigerant supply vessel equipped with a plug which can be coupled to the coupler, and the provision of refrigerant recovery vessel equipped with a plug which can be coupled to the coupler, and problem to be solved devised.

The present invention is any of the above one of the plug connectable to the coupler or the first plug, or a second plug, and means for solving the above problems.

The present invention is, the plug (i.e., any of the above one of the plug connectable to the coupler, or the first plug or a second plug) the refrigerant supply vessel equipped with, in order to solve the above problems This means.

The present invention is, the plug (i.e., any of the above one of the plug connectable to the coupler, or the first plug or a second plug) the refrigerant recovery vessel equipped with, in order to solve the above problems This means.

Further, according to the present invention, from any one of the plugs connectable to any of the couplers, any of the plugs constituting the connection fitting, the first plug, or the second plug. Since one plug is selected, it is possible to realize a configuration that can cope with both open / close and one-way open / close in relation to the coupler by connecting to one of the couplers. .

Claims (8)

A cylindrical coupler body, a lock control means biased by the first elastic member to enable locking and release of a plug connected to the coupler body, and a coupler valve body provided in the coupler body. In the coupler provided,
The coupler main body includes a partition portion formed therein with a vent hole portion that can be opened and closed by a coupler valve body, a distal end side connecting portion serving as an inner space on the distal end side from the partition portion, and a rear end side from the partition portion A rear end side connecting portion that becomes an internal space of
The partitioning portion includes an inclined surface that continuously expands from the vent hole portion on the rear end surface.
The distal end side connecting portion includes a first seal member that is inscribed in the coupler main body at a predetermined distance from the partition portion,
The coupler valve body includes a second seal member on a side peripheral surface thereof,
The inner peripheral surface of the rear end side connecting portion is provided with a female screw,
The rear end side coupling portion includes a fixing member screwed into the female screw and having a ventilation path, and a second elastic member between the fixing member and the coupler valve body,
The second seal member urged by the second elastic member is configured to abut against the inclined surface of the partition portion to close the vent hole portion, and the tip of the coupler valve body is the passage. A coupler having a configuration protruding from the pore portion toward the tip side. A connection fitting comprising the coupler of claim 1 and a plug detachable from the coupler,
The plug has a plug-side vent hole and a plug-side abutting surface capable of abutting against the coupler valve body at a tip portion of the plug. The plug includes a plug valve body that can open and close the plug-side vent hole, and the plug-side contact surface is a tip surface of the plug valve body,
3. The connection fitting according to claim 2, wherein the plug valve body includes a third seal member at a peripheral edge thereof, and a distal end of the plug valve body protrudes from the plug side vent hole portion toward the distal end side.   The plug has a flat plug-side contact surface at the center position of the tip, and the plug-side vent hole is located in a circumferential position in the plug-side contact surface or around the plug-side contact surface. The connection fitting according to claim 2, wherein the connection fitting is provided. A plug valve body having the plug-side contact surface and a plug-side vent hole formed on the plug-side contact surface and capable of opening and closing the plug-side vent hole; A plug valve body having a distal end surface, and the plug valve body includes a first plug provided with a third seal member on a periphery thereof;
The plug side abutting surface and a plug side vent hole formed in the plug side abutting surface, and a flat plug side abutting surface at the center position of the tip end, A second plug in which a plug-side air hole is provided at a circumferential position around the surface;
2. The coupler according to claim 1, wherein the coupler valve body and the plug-side contact surface can contact each other. A plug corresponding to the coupler according to claim 1 or claim 5,
One plug selected from any one of the plugs constituting the connection fitting according to claim 2 or 3, or the first plug according to claim 4, or the second plug.   A refrigerant supply container comprising the plug according to claim 6.   A refrigerant recovery container comprising the plug according to claim 6.

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