CN112049948B

CN112049948B - Connecting valves, connectors and air conditioners

Info

Publication number: CN112049948B
Application number: CN202011034420.3A
Authority: CN
Inventors: 肖庆; 陈振明; 李金伟; 马海林; 越飞
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2024-12-31
Anticipated expiration: 2040-09-27
Also published as: CN112049948A

Abstract

The invention provides a connecting valve, a connector and an air conditioner, wherein the connecting valve comprises a first valve seat, a first valve core and a sub valve core, and the first valve seat is provided with a first opening and a second opening; the first valve core is movably arranged in the first valve seat, the first valve core can block or avoid the first opening, the sub valve core is connected with the first valve core, the sub valve core is of a sealing structure, and the sub valve core is arranged towards the second opening in a telescopic way. The sub-spool being expandable and contractible is understood to mean that the sub-spool is expandable or contractible. The valve body is provided with a first valve seat, a second valve seat and a valve body, wherein the valve body is provided with a valve seat, and the valve body is provided with a valve seat. By adopting the scheme, when the connecting valve is connected with the pipeline, the elongated sub valve core penetrates into the pipeline, so that the sub valve core occupies space in the pipeline, gas in the pipeline can be discharged, and the sub valve core is retracted after the assembly is completed. The connecting valve is applied to an air conditioning system, so that the vacuum degree of the air conditioning system can be ensured.

Description

Connecting valve, connector and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a connecting valve, a connector and an air conditioner.

Background

In the field of household air conditioners, a professional technician is required to connect indoor units and outdoor units in a conventional air conditioner installation link. At present, most enterprises adopt horn mouth air-conditioning connecting pipes, and the horn mouth air-conditioning connecting pipes can realize quick connection of air-conditioning pipelines, so that the use is convenient, quick and labor-saving. The utility model provides an existing horn mouth air conditioner connecting pipe in market, includes copper joint, connecting pipe, copper nut, and the connecting pipe inserts in the copper nut, and is provided with outside convex horn-shaped outer edge in the connecting pipe that is arranged in the copper nut, and copper joint and copper nut are hugged closely the extrusion of horn-shaped outer edge when using, accomplish the connection of pipeline.

Although the horn mouth can realize quick connection, only the connection port can be used for maintaining pressure before connection, and the air conditioner connecting pipe cannot realize the pressure maintaining process. The connecting pipe is internally provided with a refrigerant pressure maintaining, the customer does not need to vacuumize during installation. However, air exists in a small space in the connecting valve and the stop valve, and if no vacuum is drawn, part of the air can enter the system, and the reliability of the system is reduced. In order to ensure the vacuum degree of the air conditioning system, the installer still needs to perform vacuumizing operation after the installation is completed, which requires professional equipment and technology, and the problems of consumed manpower and material resources and installation cost are not well solved.

Disclosure of Invention

The invention provides a connecting valve, a connector and an air conditioner, which are convenient for exhausting gas in a pipeline and ensuring the vacuum degree of an air conditioning system.

In order to achieve the aim, according to one aspect of the invention, the invention provides a connecting valve, which comprises a first valve seat, a first valve core and a sub valve core, wherein the first valve seat is provided with a first opening and a second opening, the first valve core is movably arranged in the first valve seat and can block or avoid the first opening, the sub valve core is connected with the first valve core, the sub valve core is of a sealing structure, and the sub valve core is arranged towards the second opening in a telescopic way.

Further, the sub valve core is provided with a sealing cavity, fluid is filled in the sealing cavity, the fluid can be changed into liquid state or gas state according to temperature change, the volume of the fluid expands in the process of changing into the gas state so as to enable the sub valve core to be elongated, and the volume of the fluid is reduced in the process of changing into the liquid state so as to enable the sub valve core to be shortened.

Further, the sub valve core comprises a sealing section, a first telescopic section and a second telescopic section which are sequentially connected, wherein the first telescopic section and the second telescopic section are arranged in a telescopic manner, and the second telescopic section is connected with the first valve core.

Further, the radial dimension of the second telescopic section is larger than that of the first telescopic section, the first valve core is provided with an installation cavity, the second telescopic section is located in the installation cavity, and the first telescopic section is located outside the installation cavity.

Further, the sub valve core further comprises a stop piece, the stop piece is arranged on the outer wall of the second telescopic section, the stop piece is located in the installation cavity, a limiting step is arranged in the installation cavity, and the stop piece is matched with the limiting step in a stop mode.

Further, the first valve core is further provided with a guide cavity communicated with the installation cavity, the radial size of the guide cavity is smaller than that of the installation cavity, and at least one part of the first telescopic section is located in the guide cavity.

Further, the first telescopic section and the second telescopic section are of corrugated pipe structures, the sub valve core further comprises a heated plate, and the heated plate is connected with the second telescopic section.

According to another aspect of the present invention there is provided a connector comprising a valve and a connecting valve as described above, the valve comprising a nipple which interfaces with a second opening of the connecting valve, wherein a sub-valve element of the connecting valve penetrates into the nipple after elongation to vent gas from the nipple.

Further, the valve further comprises a second valve seat and a second valve core, the second valve seat is provided with a third opening, the second valve core is movably arranged in the second valve seat, the second valve core can block or avoid the third opening, and the connecting pipe is communicated with the third opening.

Further, the connector further comprises an internal connecting pipe and a pipe connecting nut, wherein the pipe connecting nut is connected with the pipe connecting pipe, one end of the internal connecting pipe is connected with the first valve seat of the connecting valve, and the other end of the internal connecting pipe is clamped between the pipe connecting nut and the pipe connecting pipe.

According to another aspect of the present invention, there is provided an air conditioner including the connector described above.

By applying the technical scheme, the connecting valve comprises a first valve seat, a first valve core and a sub valve core, wherein the first valve seat is provided with a first opening and a second opening, the first valve core is movably arranged in the first valve seat and can block or avoid the first opening, the sub valve core is connected with the first valve core, the sub valve core is of a sealing structure, and the sub valve core is arranged in a telescopic way towards the second opening. The sub-spool being expandable and contractible is understood to mean that the sub-spool is expandable or contractible. By adopting the scheme, when the connecting valve is connected with the pipeline, the elongated sub valve core penetrates into the pipeline, so that the sub valve core occupies space in the pipeline, gas in the pipeline can be discharged, and the sub valve core is retracted after the assembly is completed. The connecting valve is applied to an air conditioning system, so that the vacuum degree of the air conditioning system can be ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic structural diagram of a connecting valve provided by an embodiment of the present invention;

FIG. 2 shows a schematic structural view of the sub-spool of FIG. 1;

FIG. 3 shows a schematic structural view of the first valve spool of FIG. 1;

FIG. 4 shows a schematic structural view of a connector (sub-cartridge extension) provided by an embodiment of the present invention;

Fig. 5 shows another schematic view of the connector of fig. 4 (sub-spool contracted).

Wherein the above figures include the following reference numerals:

10. The valve comprises a first valve seat, 20, a first valve core, 21, a mounting cavity, 22, a guide cavity, 23, a limiting step, 30, a sub valve core, 31, a sealing section, 32, a first telescopic section, 33, a second telescopic section, 34, a stop piece, 35, a heated plate, 36, a first sub cavity, 37, a second sub cavity, 40, a connecting pipe, 50, a second valve seat, 60, a second valve core, 71, an inner connecting pipe, 72, a connecting pipe nut, 81, a first sealing cap, 82 and a second sealing cap.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 5, an embodiment of the present invention provides a connecting valve, which includes a first valve seat 10, the first valve seat 10 having a first opening and a second opening, a first valve core 20 movably disposed in the first valve seat 10, the first valve core 20 being capable of blocking or avoiding the first opening, a sub valve core 30, the sub valve core 30 being connected with the first valve core 20, the sub valve core 30 being a sealing structure, the sub valve core 30 being telescopically disposed toward the second opening. Wherein, the sub valve core 30 can penetrate into a pipeline matched with the first valve seat 10 after being extended so as to discharge the gas in the pipeline.

By adopting the scheme, when the connecting valve is connected with the pipeline, the elongated sub valve core 30 is penetrated into the pipeline, so that the sub valve core 30 occupies space in the pipeline, gas in the pipeline can be discharged, and the sub valve core 30 is retracted after the assembly is completed. The connecting valve is applied to an air conditioning system, so that the vacuum degree of the air conditioning system can be ensured. In this embodiment, telescoping may be understood as expanding or contracting. The radial dimension of the sub-spool 30 is smaller than the radial dimension of the first spool 20 so that the sub-spool 30 does not impede fluid flow from the first opening into the first valve seat 10 after the first spool 20 has avoided the first opening.

In this embodiment, the sub-valve core 30 has a sealed cavity, in which a fluid is contained, and the fluid can be changed into a liquid state or a gas state according to a temperature change, wherein the volume of the fluid expands during the process of changing into the gas state to extend the sub-valve core 30, and the volume of the fluid reduces during the process of changing into the liquid state to shorten the sub-valve core 30. This allows for expansion or contraction of the sub-spool 30 by heating or cooling the sub-spool 30 and the fluid within the sub-spool 30. By adopting the scheme, the structure is simple and the operation is convenient.

In the present embodiment, the sub spool 30 includes a seal section 31, a first expansion section 32, and a second expansion section 33 connected in sequence, the first expansion section 32 and the second expansion section 33 are each telescopically provided, and the second expansion section 33 is connected to the first spool 20. This facilitates the connection of the second telescoping section 33 to the first valve spool 20 and the telescoping range of the sub valve spool 30 is long, facilitating the evacuation of gas from the pipeline.

Optionally, the first telescopic section 32 has a first subchamber 36, the second telescopic section 33 has a second subchamber 37, the first subchamber 36 and the second subchamber 37 are in communication, and the first subchamber 36 and the second subchamber 37 constitute a sealed chamber.

In this embodiment, the radial dimension of the second expansion section 33 is greater than the radial dimension of the first expansion section 32, the first spool 20 has a mounting cavity 21, the second expansion section 33 is located within the mounting cavity 21, and the first expansion section 32 is located outside the mounting cavity 21. By providing the mounting cavity 21, the second telescoping section 33 is conveniently connected with the first valve core 20, and the arrangement is compact, so that the volume of the connecting valve can be reduced.

Further, the sub valve core 30 further comprises a stop piece 34, the stop piece 34 is arranged on the outer wall of the second telescopic section 33, the stop piece 34 is located in the installation cavity 21, the installation cavity 21 is internally provided with a limiting step 23, and the stop piece 34 is in stop fit with the limiting step 23. Therefore, after the second telescopic section 33 stretches for a certain distance, the stop piece 34 is abutted against the limiting step 23, so that the second telescopic section 33 can be limited, and the second telescopic section 33 is prevented from being separated from the mounting cavity 21.

In the present embodiment, the first spool 20 further has a guide chamber 22 communicating with the installation chamber 21, the guide chamber 22 having a radial dimension smaller than the radial dimension of the installation chamber 21, and at least a portion of the first expansion section 32 being located within the guide chamber 22. The first telescoping section 32 is guided by the guide chamber 22 to telescope the first telescoping section 32 in a predetermined direction.

Optionally, the outer wall of the first valve core 20 is provided with a first sealing groove and a second sealing groove which are arranged at intervals, and sealing rings are arranged in the first sealing groove and the second sealing groove, so that a good sealing effect can be achieved. The first spool 20, the sub spool 30, and the second opening are coaxially disposed. The axis of the first opening is perpendicular to the axis of the second opening.

Optionally, the outer wall of the first valve core 20 is in threaded connection with the inner wall of the first valve seat 10, the first valve seat 10 is provided with a first operation port, a tool can be inserted into the first operation port to rotate the first valve core 20, and the connecting valve further comprises a first sealing cap 81, and the first sealing cap 81 and the first valve seat 10 are detachably connected to seal the first operation port. The first valve seat 10 is provided with a limiting step, and the limiting step is matched with the first valve core 20 in a blocking way so as to limit the movement range of the first valve core 20.

In this embodiment, the first expansion section 32 and the second expansion section 33 are both bellows structures, and the sub-valve core 30 further includes a heated plate 35, where the heated plate 35 is connected to the second expansion section 33. By adopting the bellows structure, the first expansion section 32 and the second expansion section 33 can be made to expand and contract easily, and a relatively large expansion distance is provided in the axial direction. The heated plate 35 is used to receive and transfer heat to accelerate the expansion of the sub-spool 30.

Another embodiment of the present invention provides a connector comprising a valve and the above-described connection valve, the valve comprising a nipple 40, the nipple 40 being in abutment with a second opening of the connection valve, wherein a sub-valve cartridge 30 of the connection valve penetrates into the nipple 40 after elongation to exhaust gas in the nipple 40. By adopting the scheme, when the connecting valve is connected with the connecting pipe 40, the elongated sub valve core 30 is penetrated into the connecting pipe 40, so that the valve core 30 occupies the space in the connecting pipe 40, the gas in the connecting pipe 40 can be discharged, and the sub valve core 30 is retracted after the assembly is completed. The connector is applied to an air conditioning system, and the vacuum degree of the air conditioning system can be ensured.

In this embodiment, the valve further includes a second valve seat 50 and a second valve core 60, the second valve seat 50 has a third opening, the second valve core 60 is movably disposed in the second valve seat 50, the second valve core 60 can block or avoid the third opening, and the adapter tube 40 communicates with the third opening. By the movement of the second valve core 60, pressure maintaining and communication of the pipeline can be achieved. The second valve core 60 avoids the third opening, and after the first valve core 20 avoids the first opening, the connection valve and the valve can be communicated.

Optionally, the valve is a shut-off valve. The second valve core 60 is screwed with the second valve seat 50. The outer wall of the second valve core 60 is provided with a third sealing groove, and a sealing ring is arranged in the third sealing groove. The second valve seat 50 has a second operating port into which a tool can be inserted to rotate the second valve core 60, and the valve further includes a second cap 82, the second cap 82 being detachably connected to the second valve seat 50 to block the second operating port.

Further, the connector further comprises an inner connecting tube 71 and a union nut 72, the union nut 72 is connected with the union 40, one end of the inner connecting tube 71 is connected with the first valve seat 10 of the connecting valve, and the other end of the inner connecting tube 71 is clamped between the union nut 72 and the union 40. The other end of the interconnecting pipe 71 has a bell mouth structure. Through the arrangement, the sealing connection between the valve and the connecting valve can be realized.

Another embodiment of the present invention provides an air conditioner, which includes the connector described above. Therefore, the air conditioner has high vacuum degree and good heat exchange effect. The scheme can realize the self-emptying function of the connecting structure of the air conditioner inner and outer machines, and realize partial emptying in the installation process by means of heating/cooling and other modes which are easy to realize. Meanwhile, after the installation is finished, the sub valve core is used for recovering the fluid in the sealing cavity to be liquid at the evacuation end after the air conditioner is operated in the operating temperature range, so that the pressure is reduced, the sub valve core is shortened, and the whole system can normally work and operate. The self-emptying reduces the installation professionality of workers and equipment, reduces the installation time and reduces the installation cost.

As shown in fig. 4, this stage is an initial assembly stage, in which the sealed chamber contains a lower boiling point liquid, and when the heated end of the sub-valve cartridge is warmed, heat is transferred to the sealed chamber, the liquid in the chamber is vaporized and expanded, the internal pressure increases, and the extended end is driven to extend toward the valve (stop valve) end. After the second subchamber of the valve core expands to a certain distance, the stop piece is in contact with the valve body, the second subchamber stops moving forwards, and at the moment, the first subchamber can still move forwards until the first subchamber extends to a preset length. During assembly connection, the emptying end (namely the sealing section) is inserted into the connecting pipe of the stop valve to empty the interior of the stop valve. At this time, the bell mouth of the internal connecting pipe and the connecting pipe of the stop valve are connected, the nut of the stop valve is screwed, and the stop valve and the connecting valve are sealed through hard sealing.

When heating is stopped, the gas in the elastic sealing cavity is gradually liquefied, the pressure of the elastic sealing cavity is reduced, the volume is contracted, and the extending end is reversely retracted from the stop valve end.

Normally, liquid with a boiling point of 60-120 ℃ at normal temperature and normal pressure is selected in the sub valve core, and when the temperature is higher than the boiling point, the liquid begins to vaporize.

As shown in fig. 5, this stage is that the connection valve and the shut-off valve are already connected, and the flare and the shut-off valve connection pipe are connected in a sealing manner by a nut. At this time, the valve core at the stop valve and the valve core at the connecting valve are opened respectively through the knob valve core, so that the inner and outer connecting pipes are communicated with the air suction (or air discharge) of the compressor. Because the pressure of the refrigerant in the connecting pipe at the compressor is about 1.5MPa (the pressure when the R32 refrigerant system is not operated at 20 ℃) when the connecting pipe is not operated, the pressure is far greater than the pressure (1 atmosphere is generally selected at normal temperature) in the sealing cavity of the sub valve core of the connecting valve, and at the moment, the emptying end of the sub valve core can be further compressed. When the system starts to operate, the pressure in the pipe is higher, the external pressure of the sub valve core is increased, and the sealing cavity is compressed to the lowest. So far, the indoor unit and the outdoor unit of the air conditioner are communicated through the connecting pipes and normally run.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A connecting valve, comprising:

A first valve seat (10), the first valve seat (10) having a first opening and a second opening;

a first valve core (20) movably arranged in the first valve seat (10), wherein the first valve core (20) can block or avoid the first opening;

The sub valve core (30) is connected with the first valve core (20), the sub valve core (30) is of a sealing structure, and the sub valve core (30) is arranged in a telescopic way towards the second opening;

Wherein, when connecting the connecting valve and the pipeline, the sub valve core (30) after extension penetrates into the pipeline, thus the sub valve core (30) occupies the space in the pipeline, thereby the gas in the pipeline is discharged, and the sub valve core (30) is retracted after being assembled.

2. The connecting valve according to claim 1, characterized in that the sub-valve element (30) has a sealed cavity in which a fluid is accommodated, which fluid can be changed to a liquid state or a gaseous state according to a temperature change, wherein the fluid expands in volume during the change to the gaseous state to elongate the sub-valve element (30), and the fluid reduces in volume during the change to the liquid state to shorten the sub-valve element (30).

3. The connecting valve according to claim 1, characterized in that the sub-spool (30) comprises a sealing section (31), a first telescopic section (32) and a second telescopic section (33) connected in sequence, the first telescopic section (32) and the second telescopic section (33) being telescopically arranged, the second telescopic section (33) being connected with the first spool (20).

4. A connecting valve according to claim 3, characterized in that the radial dimension of the second telescopic section (33) is greater than the radial dimension of the first telescopic section (32), the first valve spool (20) has a mounting cavity (21), the second telescopic section (33) is located inside the mounting cavity (21), and the first telescopic section (32) is located outside the mounting cavity (21).

5. The connecting valve according to claim 4, characterized in that the sub valve core (30) further comprises a stop (34), the stop (34) is arranged on the outer wall of the second telescopic section (33), the stop (34) is positioned in the mounting cavity (21), the mounting cavity (21) is internally provided with a limit step (23), and the stop (34) is in stop fit with the limit step (23).

6. The connecting valve according to claim 4, characterized in that the first spool (20) further has a guide chamber (22) communicating with the mounting chamber (21), the guide chamber (22) having a radial dimension smaller than the radial dimension of the mounting chamber (21), at least a portion of the first telescoping section (32) being located within the guide chamber (22).

7. A connecting valve according to claim 3, wherein the first telescopic section (32) and the second telescopic section (33) are bellows structures, the sub-valve core (30) further comprises a heated plate (35), and the heated plate (35) and the second telescopic section (33) are connected.

8. A connector comprising a valve and a connecting valve according to any one of claims 1 to 7, the valve comprising a nipple (40), the nipple (40) interfacing with a second opening of the connecting valve, wherein a sub-cartridge (30) of the connecting valve penetrates into the nipple (40) after elongation to vent gas within the nipple (40).

9. The connector of claim 8, wherein the valve further comprises a second valve seat (50) and a second valve core (60), the second valve seat (50) having a third opening, the second valve core (60) being movably disposed within the second valve seat (50), the second valve core (60) being capable of blocking or unseating the third opening, the nipple (40) and the third opening communicating.

10. The connector according to claim 8, further comprising an inner connecting tube (71) and a nipple nut (72), the nipple nut (72) being connected to the nipple (40), one end of the inner connecting tube (71) being connected to the first valve seat (10) of the connecting valve, the other end of the inner connecting tube (71) being clamped between the nipple nut (72) and the nipple (40).

11. An air conditioner, characterized in that the air conditioner comprises the connector of any one of claims 8 to 10.