JP2023525970A - Charge valve and air conditioning system having the same - Google Patents

Abstract

A charge valve comprising a valve seat (10), a valve stem seat (20), a valve stem assembly (30) and a charge fitting (40), wherein the valve seat (10) has a first valve chamber (11). , one end of the valve core seat (20) extends into the first valve chamber (11) and is sealingly connected to the valve seat (10), and the valve core seat (20) has a second valve chamber (21) and a second A valve port (22) is drilled in communication with the valve chamber (21), and one end of the valve core assembly (30) is positioned within the second valve chamber (21) to open the second valve chamber (21). The other end of the valve core assembly (30) is movable along the axis, and the other end of the valve core assembly (30) is housed in the first valve chamber (11) to open and close the valve port (22) according to the movement of the valve core assembly (30). The air joint (40) is provided at one end of the valve core seat (20) away from the valve seat (10) and has an integral structure with the valve core seat (20). 41) is drilled, and the charge hole (41) passes through the charge joint (40) along the axial direction of the second valve chamber (21) and communicates with the second valve chamber (21) for charging. A charge valve forming a passageway (101). Additionally, an air conditioning system is disclosed. The advantage of charge valves is their high charging efficiency. [Selection diagram] Fig. 1

Description

(Related application)
This application claims priority to a Chinese patent application with application number 202020774576.4 and titled "Charge Valve and Air Conditioning System Having the Same" filed on May 12, 2020, The entire contents of which are incorporated into this application by reference.

The present application relates to the technical field of control valves, and more particularly to charge valves and air conditioning systems having the same.

The charge valve is mainly applied to air-conditioning, refrigeration, and refrigeration systems, and is used to charge refrigerant, or is used as a maintenance valve for vacuuming during maintenance. A conventional charge valve includes a valve seat, a valve stem seat and a plenum seat, the plenum seat being attached to the valve seat, inserted and used to connect to an external plenum device, and the valve seat is located in the plenum seat and has a chamber and a valve stem at the valve stem seat. As mentioned above, since the valve core seat is provided inside the charge seat, the diameter of the charge passage is relatively small and the charging speed of the refrigerant is slow. It can be understood that the efficiency is low and the speed is slow.

In view of this, the present application provides a charging valve with a fast charging speed and a simple structure and an air conditioning system having the same.

The present application is a charge valve including a valve seat, a valve stem seat, a valve stem assembly and a charge fitting, the valve seat having a first valve chamber and one end of the valve stem extending into the first valve chamber. is sealingly connected to the valve seat at
The valve core seat is provided with a second valve chamber and a valve port communicating with the second valve chamber, and one end of the valve core assembly is located in the second valve chamber and extends along the axis of the second valve chamber. the other end of the valve core assembly is housed in the first valve chamber to open and close the valve port according to the movement of the valve core assembly;
The charging joint is provided at one end of the valve core seat away from the valve seat and is integral with the valve core seat, the charging joint is provided with a charging hole, and the charging hole extends into the second valve chamber. a charge valve extending axially through the charge coupling and forming a charge passageway through the second valve chamber.

In the present application, by making the filling joint and the valve core seat into an integral structure, when the size of the valve core seat is constant, it can effectively increase the inner diameter of the filling hole and the second valve chamber; That is, it effectively increases the size of the charge passage. Moreover, the charging speed of the medium is greatly improved, and the charging efficiency is higher. In addition, the structure of the present application has a small number of members, is easy to process, and has a simple structure.

In one embodiment, the outer wall of the valve core seat has first external threads and the inner wall of the first valve chamber has first internal threads, and the valve core seat extends into the first valve chamber to provide the first external threads and the first external threads. It is screwed to the valve seat via the first internal thread.

The screw connection not only simplifies the operation, but also makes the connection between the two easier.

In one embodiment, the seal between the valve stem seat and the valve seat is a soft seal and/or a hard seal.

In one embodiment, a first sealing ring is fitted to the outer wall of the valve core seat such that a soft seal connection is provided between the valve core seat and the valve seat. 1, and/or the outer wall of the valve core seat and the inner wall of the first valve chamber contact and abut each other such that the valve core seat and the valve seat are in a hard-sealed connection. touched.

In one embodiment, the valve core assembly includes a valve core rod and a second sealing ring, one end of the valve core rod located in the second valve chamber and movable along an axis of the second valve chamber; The other end is accommodated in the first valve chamber, and the second sealing ring is accommodated in the first valve chamber and fitted to the valve core rod to open and close the valve opening according to the movement of the valve core rod. .

In one embodiment, the valve core assembly includes an elastic spring that is fitted to one end of the valve core rod remote from the second sealing ring and used to exert a force on the return of the valve core rod and the sealing of the valve orifice. Further includes a member.

In one embodiment, a fixed block is attached to the second valve chamber, the fixed block is perforated with a through hole, and one end of the valve core rod remote from the second sealing ring is inserted into the through hole. The outer wall of the valve core rod and the inner wall of the through hole are spaced apart from each other.

One end of the valve core rod remote from the second sealing ring has a mounting portion, one end of the elastic member abuts the mounting portion, and the other end abuts the fixed block.

In one embodiment, along the radial direction of the valve core seat, one end of the valve core seat proximate to the inflatable joint is provided with a positioning portion protruding, and one end of the valve core seat is recessed into the first valve chamber. Afterwards, the positioning portion is brought into contact with the valve seat.

In one embodiment, the charge valve further includes a removable lid that can be connected to the plenum fitting to seal the plenum.

In one embodiment, the outer wall of the plenum fitting has a second external thread, and the lid has a second internal thread, the second external thread and the second internal thread being threaded and hard-sealed together.

In one embodiment, the end surface of one end of the air joint close to the lid is inclined and has an engaging portion inside the lid, and when the lid is put on the air joint, the engaging portion It abuts on the end surface of one end of the lid.

This application further provides the following technical aspects.
The air conditioning system includes the charge valve described above.
Compared with the prior art, the present application has an integral structure of the filling joint and the valve core seat, so that when the size of the valve core seat is constant, it effectively reduces the inner diameter of the filling hole and the second valve chamber. , effectively increasing the size of the charge passage. Moreover, the charging speed of the medium is greatly improved, and the charging efficiency is higher. In addition, the structure of the present application has a small number of members, is easy to process, and has a simple structure.

1 is a schematic diagram of a cross-sectional structure of Embodiment 1 of a charge valve provided in the present application; FIG. FIG. 2 is a schematic diagram of the cross-sectional structure of the valve core seat in FIG. 1 ; FIG. 4 is a structural schematic diagram of a fixed block; FIG. 4 is a schematic diagram of the cross-sectional structure of Embodiment 2 of the charge valve provided in the present application; FIG. 3 is a schematic diagram of the cross-sectional structure of Embodiment 3 of the charge valve provided in the present application; FIG. 4 is a schematic diagram of the cross-sectional structure of Embodiment 4 of the charge valve provided in the present application;

100 charge valve, 101 charge passage, 102 pipeline, 10 valve seat, 11 first valve chamber, 12 first female screw, 13 connection hole, 20 valve core seat, 21 second valve chamber, 211 fixing block, 211a through hole, 22 valve port, 23 first male thread, 24 first sealing ring, 25 positioning portion, 30 valve core assembly, 31 valve core rod, 311 mounting portion, 32 second sealing ring, 33 elastic member, 40 air-filling joint, 41 filling hole, 42 second male thread, 50 lid body, 51 second female thread, 52 engaging portion.

Hereinafter, the technical aspects of the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Clearly not the form. All other embodiments obtained by persons skilled in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

It should be noted that when an assembly is said to be "attached" to another assembly, it may be attached directly to the other assembly or there may be intervening assemblies. When an assembly is considered to be "provided" in another assembly, it may be directly provided in the other assembly or there may be intervening assemblies simultaneously. When an assembly is considered to be "fixed" to another assembly, it may be fixed directly to the other assembly or there may be intervening assemblies at the same time.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and/or" includes any/and all combinations of one or more of the associated listed items.

Example 1
The charge valve 100 provided in the present application is mainly applied to the air conditioning system and used to be engaged with an external charging device to realize refrigerant charge for the air conditioning system charge. Of course, in other embodiments, the charge valve 100 can also be applied in fields such as maintenance.

Specifically, as shown in FIG. 1, the charge valve 100 includes a valve seat 10, a valve stem seat 20, a valve stem assembly 30 and a charge fitting 40, the valve seat 10 having a first valve chamber 11. , one end of the valve core seat 20 enters the first valve chamber 11 and is sealingly connected to the valve seat 10 , and the valve core seat 20 has a second valve chamber 21 and a valve port 22 communicating with the second valve chamber 21 . , one end of the valve core assembly 30 is located in the second valve chamber 21 and is movable along the axis of the second valve chamber 21, and the other end of the valve core assembly 30 is located in the first valve It is accommodated in the chamber 11 and opens and closes the valve port 22 according to the movement of the valve core assembly 30 , and the air-filling joint 40 is provided at one end of the valve core seat 20 away from the valve seat 10 and is integrated with the valve core seat 20 . A charging hole 41 is formed in the charging joint 40 , and the charging hole 41 passes through the charging joint 40 along the axial direction of the second valve chamber 21 and communicates with the second valve chamber 21 . to form a charge passage 101 .

The charging joint 40 is provided at one end of the valve core seat 20 and has an integral structure with the valve core seat 20 so that when the structural strength and structural size of the valve core seat 20 are satisfied, the charging hole 41 and the second It can be seen that the inner diameter of the valve chamber 21 can be increased to the maximum extent, i.e. effectively increasing the size of the charging passage 101, which greatly improves the charging speed of the medium and increases the charging efficiency. expensive. In addition, the structure of the present application has fewer members, is easy to process, is simple in structure, and is more compact in structure.

Continuing to refer to FIG. 1, valve seat 10 is of brass material. It is understood that in other embodiments, the valve seat 10 may employ other materials and is not limited here. One end of the valve seat 10 has an opening (not shown) communicating with the first valve chamber 11 , and one end of the valve core seat 20 enters the first valve chamber 11 through the opening and is sealingly connected to the valve seat 10 . be. A connection hole 13 is drilled at the other end of the valve seat 10, and the connection hole 13 is used to connect to the pipeline 102 of the air conditioning system, and the pipeline 102 realizes the refrigerant charge for the air conditioning system.

As shown in FIGS. 1 and 2, the valve core seat 20 is also made of brass. It can be understood that the valve core seat 20 may adopt other materials in other embodiments, and is not limited here.

Alternatively, the outer wall of the valve core seat 20 has a first external thread 23 and the inner wall of the first valve chamber 11 has a first internal thread 12 , the valve core seat 20 extending into the first valve chamber 11 . is screwed to the valve seat 10 by the engagement of the first male thread 23 and the first female thread 12 at . It can be seen that the threaded connection not only simplifies the operation, but also makes the connection between the two easier.

In this embodiment, the first male thread 23 is provided at one end of the valve core seat 20 close to the valve opening 22 .

Further, the seal between valve seat 20 and valve seat 10 may be a soft seal and/or a hard seal.

In one embodiment, a first sealing ring 24 is fitted to the outer wall of one end of the core seat 20 adjacent the valve port 22 to provide a soft seal connection between the valve seat 20 and the valve seat 10 . The first sealing ring 24 is brought into contact with the inner wall of the first valve chamber 11 when one end of the valve core seat 20 enters the first valve chamber 11 through the opening.

In another embodiment, the outer side of the valve core seat 20 when one end of the valve core seat 20 enters the first valve chamber 11 through the opening so that the valve core seat 20 and the valve seat 10 are hard-sealed. The walls and the inner wall of the first valve chamber 11 are abutted against each other.

It should be noted that the soft seal and hard seal configurations described above may be used alone or in combination. In this embodiment, in order to improve the sealing effect between the valve core seat 20 and the valve seat 10, the space between the valve core seat 20 and the valve seat 10 is sealed by a combination of a soft seal and a hard seal. conduct.

Optionally, the position of the first sealing ring 24 on the valve core seat 20 is further away from the valve port 22 than the position of the first external thread 23 on the valve core seat 20 , i.e., the position of the valve core seat 20 . Along the axial direction, the first sealing ring 24 is located above the first external thread 23 .

As shown in FIG. 2 , along the radial direction of the valve core seat 20 , a positioning portion 25 protrudes from one end of the valve core seat 20 that is close to the filling joint 40 , and one end of the valve core seat 20 protrudes from the first end. 1 After entering the valve chamber 11 , the positioning part 25 can be abutted against the valve seat 10 , thereby realizing the positioning/limiting of the valve core seat 20 .

Alternatively, the positioning part 25 and the valve core seat 20 are designed integrally.

Furthermore, the connecting portion between the positioning portion 25 and the outside of the valve core seat 20 is an inclined surface, and has an opening of the valve seat 10 when one end of the valve core seat 20 enters into the first valve chamber 11 from the opening. One end abuts against this sloping surface, thereby providing a hard seal between the two. It can be understood that by adopting the inclined surface form, the contact between the two becomes line contact, and the sealing effect becomes better.

As shown in FIG. 1 , the valve core assembly 30 includes a valve core rod 31 and a second sealing ring 32 , one end of the valve core rod 31 is located in the second valve chamber 21 and extends along the axis of the second valve chamber 21 . The other end is housed in the first valve chamber 11 , and the second sealing ring 32 is housed in the first valve chamber 11 and fitted to the valve core rod 31 . , the valve port 22 is opened and closed according to the movement of the valve core rod 31 .

The valve core rod 31 has a substantially rod shape, and an attachment portion 311 is attached to one end of the valve core rod 31 that is close to the valve opening 22 . One end of the mounting portion 311 can enter into the second valve chamber 21, the other end is located in the first valve chamber 11 (i.e., located outside the second valve chamber 21), and the second sealing ring 32 is fitted to the mounting portion 311 .

Optionally, the mounting portion 311 has a substantially triangular shape, a mounting groove (not shown) is drilled in the mounting portion 311, and a portion of the second sealing ring 32 fits into the mounting groove. , thereby realizing the attachment of the second sealing ring 32 .

The mounting portion 311 and the valve core rod 31 are integrated. Of course, in other embodiments, the mounting portion 311 and the valve core rod 31 may be split.

In order to facilitate the return of the valve core rod 31 , the valve core assembly 30 is fitted to one end of the valve core rod 31 remote from the second sealing ring 32 to facilitate the return of the valve core rod 31 and the opening of the valve port 22 . It further includes a resilient member 33 that is used to apply force to the seal.

Optionally, the elastic member 33 is a member having elastic restoring force such as a spring.

2 and 3, a fixing block 211 is attached to the second valve chamber 21, and a through hole 211a is drilled in the fixing block 211 to provide a second seal for the valve core rod 31. One end away from the retaining ring 32 is inserted into the through hole 211a to realize the mounting of the valve core rod 31. As shown in FIG.

Alternatively, as shown in FIG. 3, the fixed block 211 has a flattened shape, and a flow passage is formed between the outer wall of the fixed block 211 and the inner wall of the second valve chamber 21 to form a filling hole. 41, the flow passage, and the second valve chamber 21, the above charge passage 101 is formed. When opening the valve port 22, the refrigerant passes through the charging hole 41, the flow passage, the second valve chamber 21 and the valve port 22 in this order, and flows through the connecting hole 13 into the pipeline 102 of the air conditioning system.

At the same time, one end of the valve core rod 31 away from the second sealing ring 32 has a mounting portion 311 , one end of the elastic member 33 abuts on the mounting portion 311 and the other end abuts on the fixed block 211 . Thus, attachment of the elastic member 33 is realized.

The charging joint 40 is also made of brass material and is integrally injection molded with the valve seat 20 . The charging joint 40 is provided on the side of the positioning portion 25 away from the valve core seat 20 , that is, the positioning portion 25 is positioned between the valve core seat 20 and the charging joint 40 .

As shown in FIG. 1 , the charge valve 100 further includes a removable lid 50 that can be connected to the fill fitting 40 to seal the fill hole 41 .

The outer wall of the air-fill joint 40 has a second male thread 42, the lid body 50 has a second female thread 51, and the second male thread 42 and the second female thread 51 are screwed together and sealingly connected. , provides a removable connection between the lid 50 and the inflatable joint 40 . It can be understood that the use of screwing facilitates attachment and detachment of the lid body 50, facilitates connection, and facilitates charging.

It should be noted that in other embodiments, a structure such as a turnbuckle may be adopted between the lid 50 and the air-filling joint 40 to achieve a detachable connection between the two; Description is omitted here.

Furthermore, the seal between the lid 50 and the air-filling joint 40 is a hard seal, ie the second external thread 42 and the second internal thread 51 are connected and at the same time a seal is achieved between them. Of course, in other embodiments, sealing may be provided by placing a sealing ring between the lid 50 and the filling joint 40 .

Optionally, in order to improve the sealing effect between the lid 50 and the air-fill joint 40 , the end surface of one end of the air-fill joint 40 adjacent to the lid 50 is inclined so that the lid 50 An engaging portion 52 is provided inside, and the engaging portion 52 is brought into contact with an end surface of one end of the lid 50 when the lid 50 is put on the air-filling joint 40 .

The process of using the charge valve 100 will be described below.
When it is necessary to charge the refrigerant, first remove the lid 50, then connect the external charging device and the charging joint 40, and move the valve core rod 31 under the action of the charging device, thereby causing the valve Opening the port 22, the connecting hole 13 passes through the valve port 22, the second valve chamber 21 and the charging hole 41 to communicate with them, and finally operates the external charging device to charge the refrigerant. After charging is completed, the external charging device is removed, at this time the valve core rod 31 is automatically restored under the action of the elastic member 33, the valve opening 22 is in a closed state, and the cover 50 is put on, End the entire charging process.

In the present application, the charge joint 40 and the valve seat 20 are made into an integral structure, which effectively increases the inner diameter of the charge hole 41 and the second valve chamber 21 when the size of the valve seat 20 is constant. , effectively increasing the size of the charge passage 101 . In addition, the charging speed of the medium is greatly improved and the charging efficiency is higher. In addition, the structure of the present application has a small number of members, is easy to process, and has a simple structure.

The present application further provides an air conditioning system (not shown) including the charge valve 100 described above. At the same time, the present air conditioning system also has the above advantages, which are omitted here.

Example 2
As shown in FIG. 4, the structures of the second embodiment and the first embodiment are basically the same, and the description of the common points is omitted here. The difference is the structure of the valve core rod 31 and the mounting form of the second sealing ring 32 .

Specifically, in this embodiment, the valve core rod 31 and the mounting portion 311 are of a split body type, and at the same time, one end of the valve core rod 31 for connecting the mounting portion 311 is positioned inside the first valve chamber 11 . , is inserted into the mounting portion 311 .

Further, a side surface of the mounting portion 311 facing the valve core rod 31 is recessed to form a mounting groove (not shown), and the second sealing ring 32 is fitted to the valve core rod 31 and fixed in the mounting groove.

Example 3
As shown in FIG. 5, the structures of the third embodiment and the first embodiment are basically the same, and the description of the common points is omitted here. The difference is the positioning of the first male screw 23 and the first sealing ring 24 on the valve core seat 20 .

Specifically, in the present embodiment, the first male thread 23 is provided close to the positioning portion 25 so that the first female thread 12 and the first male thread 23 can correspond to each other. A corresponding first internal thread 12 is provided adjacent the opening of the valve seat 10 . A first sealing ring 24 is provided adjacent to the valve port 22 and fitted to the outer wall of the valve core seat 20 . In other words, the position of the first sealing ring 24 on the valve core seat 20 is closer to the valve opening 22 than the position of the first male thread 23 on the valve core seat 20 , i.e., in the axial direction of the valve core seat 20 . Along the way, the first sealing ring 24 is located below the first external thread 23 .

Example 4
As shown in FIG. 6, the structures of the fourth embodiment and the second embodiment are basically the same, and the description of the common points is omitted here. The difference is the positioning of the first male screw 23 and the first sealing ring 24 on the valve core seat 20 .

Specifically, in the present embodiment, the first male thread 23 is provided close to the positioning portion 25 so that the first female thread 12 and the first male thread 23 can correspond to each other. A corresponding first internal thread 12 is provided adjacent the opening of the valve seat 10 . A first sealing ring 24 is provided adjacent to the valve port 22 and fitted to the outer wall of the valve core seat 20 . In other words, the position of the first sealing ring 24 on the valve core seat 20 is closer to the valve opening 22 than the position of the first male thread 23 on the valve core seat 20 , i.e., in the axial direction of the valve core seat 20 . Along the way, the first sealing ring 24 is located below the first external thread 23 .

Each technical feature of the above embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of each technical feature of the above embodiments are not described. Unless the combinations are inconsistent, any range should be considered as described herein.

It should be understood by those skilled in the art that the above embodiments are merely used to describe the present application and are not intended to limit the present application. Any suitable modifications and variations made according to the embodiments shall fall within the scope of protection claimed in this application.

Claims (10)

A charge valve including a valve seat, a valve stem seat, a valve stem assembly and a charge fitting, the valve seat having a first valve chamber, one end of the valve stem extending into the first valve chamber. sealingly connected to the valve seat;
The valve core seat is provided with a second valve chamber and a valve port communicating with the second valve chamber, and one end of the valve core assembly is located in the second valve chamber and is connected to the second valve. movable along the axis of the chamber, the other end of the valve core assembly being housed in the first valve chamber to open and close the valve port according to movement of the valve core assembly;
The charging joint is provided at one end of the valve core seat away from the valve seat and has an integral structure with the valve core seat. A charge valve, wherein a bore extends axially through the second valve chamber through the charge coupling and forms a charge passageway with the second valve chamber. The outer wall of the valve core seat has first external threads and the inner wall of the first valve chamber has first internal threads, the valve core seat extending into the first valve chamber to accommodate the first external threads and the first external threads. 2. The charge valve of claim 1, wherein the first internal thread is threaded onto the valve seat. 2. The charge valve of claim 1, wherein the seal between the valve stem seat and the valve seat is a soft seal and/or a hard seal. A first sealing ring is fitted to the outer wall of the valve core seat so that a soft seal connection is established between the valve core seat and the valve seat. abutted against the inner wall of one valve chamber and/or
4. The method of claim 3, wherein an outer wall of said valve core seat and an inner wall of said first valve chamber are in contact with each other to provide a hard seal connection between said valve core seat and said valve seat. Charge valve as described. The valve core assembly includes a valve core rod and a second sealing ring, one end of the valve core rod being positioned in the second valve chamber and movable along an axis of the second valve chamber, and The other end of the valve core rod is housed in the first valve chamber, and the second sealing ring is housed in the first valve chamber and fitted to the valve core rod to form the valve core. 2. The charge valve according to claim 1, which opens and closes the valve opening according to the movement of the rod. The valve core assembly is an elastic member that is fitted to one end of the valve core rod remote from the second sealing ring and used to apply force to return the valve core rod and seal the valve port. 6. The charge valve of claim 5, further comprising a member. A fixed block is attached to the second valve chamber, a through hole is bored in the fixed block, and one end of the valve core rod remote from the second sealing ring is inserted into the through hole. and the outer wall of the valve core rod and the inner wall of the through hole are spaced apart,
7. The charge according to claim 6, wherein one end of the stem rod remote from the second sealing ring has a mounting portion, one end of the elastic member abuts the mounting portion and the other end abuts the fixed block. valve. Along the radial direction of the valve core seat, a positioning portion protrudes from one end of the valve core seat adjacent to the air filling joint, and the one end of the valve core seat enters the first valve chamber. 3. The charge valve of claim 2, wherein the positioning portion later abuts the valve seat. 2. The charge valve of claim 1, wherein the charge valve further comprises a removable lid, the lid being connectable to the plenum fitting to seal the plenum. An air conditioning system comprising a charge valve according to any one of claims 1-9.

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