Connecting valves, connectors and air conditioners

Abstract

The present invention provides a connecting valve, a connector and an air conditioner. The connecting valve includes a first valve seat, a first valve core and a sub-valve core. The first valve seat has a first opening and a second opening. The first valve core is movably arranged in the first valve seat, and the first valve core can block or avoid the first opening. The sub-valve core is connected to the first valve core, and the sub-valve core is a sealing structure, and the sub-valve core is telescopically arranged toward the second opening. The telescopic sub-valve core can be understood as the sub-valve core being expandable or contractible. Among them, after the sub-valve core is stretched, it can be inserted into the pipeline matched with the first valve seat to discharge the gas in the pipeline. With this scheme, when the connecting valve and the pipeline are connected, the stretched sub-valve core is inserted into the pipeline, so that the sub-valve core occupies the space in the pipeline, so that the gas in the pipeline can be discharged, and the sub-valve core can be retracted after assembly. The connecting valve is applied to the air-conditioning system to ensure the vacuum degree of the air-conditioning system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a connecting valve, a connector and an air conditioner. Background Art

[0002] In the field of household air conditioners, the conventional air conditioner installation process requires professional technicians to connect the indoor and outdoor units. At present, most companies use bell-shaped air conditioner connecting pipes, which can realize the quick connection of air conditioning pipes. It is convenient, fast and labor-saving to use. The existing bell-shaped air conditioner connecting pipes on the market include copper joints, connecting pipes and copper nuts. The connecting pipes are inserted into the copper nuts, and the connecting pipes located in the copper nuts are provided with a trumpet-shaped outer edge protruding outward. When in use, the copper joints and the copper nuts squeeze the trumpet-shaped outer edge tightly to complete the connection of the pipes.

[0003] Although the bell mouth can achieve quick connection, it can only maintain pressure at the connection port before connection, and the air conditioning connecting pipe cannot achieve the pressure maintenance process. There is refrigerant pressure maintenance in the connecting pipe, and the customer does not need to evacuate during installation. However, there is air in the small space inside the connecting valve and the stop valve. If it is not evacuated, this part of the air may enter the system and reduce the reliability of the system. In order to ensure the vacuum degree of the air conditioning system, the installation workers are still required to perform vacuuming after the installation is completed. This requires professional equipment and technology, and the problems of manpower and material resources consumed and installation costs have not been well solved. Summary of the invention

[0004] The invention provides a connecting valve, a connector and an air conditioner, so as to discharge the gas in the pipeline and ensure the vacuum degree of the air conditioning system.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, the present invention provides a connecting valve, comprising: a first valve seat, the first valve seat having a first opening and a second opening; a first valve core, movably arranged in the first valve seat, the first valve core can block or avoid the first opening; a sub-valve core, the sub-valve core is connected to the first valve core, the sub-valve core is a sealing structure, and the sub-valve core is telescopically arranged toward the second opening.

[0006] Furthermore, the sub-valve core has a sealed cavity, in which a fluid is filled, and the fluid can become a liquid or a gas according to temperature changes; wherein, the volume of the fluid expands in the process of becoming a gas, so that the sub-valve core stretches; and the volume of the fluid shrinks in the process of becoming a liquid, so that the sub-valve core shortens.

[0007] Furthermore, the sub-valve core includes a sealing section, a first telescopic section and a second telescopic section which are connected in sequence, the first telescopic section and the second telescopic section can be telescopically arranged, and the second telescopic section is connected to the first valve core.

[0008] Further, a radial dimension of the second telescopic section is greater than a radial dimension of the first telescopic section, the first valve core has an installation cavity, the second telescopic section is located in the installation cavity, and the first telescopic section is located outside the installation cavity.

[0009] Furthermore, the sub-valve core also includes a stopper, which is arranged on the outer wall of the second telescopic section. The stopper is located in the installation cavity, and a limiting step is provided in the installation cavity. The stopper and the limiting step stopper cooperate with each other.

[0010] Furthermore, the first valve core also has a guide cavity communicated with the installation cavity, the radial dimension of the guide cavity is smaller than the radial dimension of the installation cavity, and at least a part of the first telescopic section is located in the guide cavity.

[0011] Furthermore, the first telescopic section and the second telescopic section are both bellows structures, and the sub-valve core also includes a heat-receiving plate, and the heat-receiving plate is connected to the second telescopic section.

[0012] According to another aspect of the present invention, a connector is provided, which includes a valve and the above-mentioned connecting valve, wherein the valve includes a connecting pipe, and the connecting pipe is connected to the second opening of the connecting valve, wherein the sub-valve core of the connecting valve penetrates into the connecting pipe after extension to discharge the gas in the connecting pipe.

[0013] Furthermore, the valve also includes a second valve seat and a second valve core, the second valve seat has 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 connected to the third opening.

[0014] Furthermore, the connector also includes an inner connecting tube and a pipe connecting nut, the pipe connecting nut is connected to the connecting tube, one end of the inner connecting tube is connected to the first valve seat of the connecting valve, and the other end of the inner connecting tube is clamped between the pipe connecting nut and the connecting tube.

[0015] According to another aspect of the present invention, an air conditioner is provided, comprising the above connector.

[0016] By applying the technical solution of the present invention, a connecting valve is provided, which includes a first valve seat, a first valve core and a sub-valve core. The first valve seat has a first opening and a second opening; the first valve core is movably arranged in the first valve seat, and the first valve core can block or avoid the first opening; the sub-valve core is connected to the first valve core, the sub-valve core is a sealing structure, and the sub-valve core is telescopically arranged toward the second opening. The telescopic sub-valve core can be understood as the sub-valve core being expandable or contractible. With this solution, when connecting the connecting valve and the pipeline, the extended sub-valve core is inserted into the pipeline, so that the sub-valve core occupies the space in the pipeline, thereby discharging the gas in the pipeline, and the sub-valve core can be retracted after assembly. The connecting valve is applied to the air-conditioning system to ensure the vacuum degree of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a connecting valve provided in an embodiment of the present invention is shown;

[0019] Figure 2 Shows Figure 1 A schematic diagram of the structure of the sub-valve core;

[0020] Figure 3 Shows Figure 1 A schematic diagram of the structure of the first valve core;

[0021] Figure 4 A schematic structural diagram of a connector provided by an embodiment of the present invention is shown (sub-valve core is extended);

[0022] Figure 5 Shows Figure 4 Another schematic diagram of the connector in (sub-valve core retracted).

[0023] The above drawings include the following reference numerals:

[0024] 10. First valve seat; 20. First valve core; 21. Installation cavity; 22. Guide cavity; 23. Limit step; 30. Sub-valve core; 31. Sealing section; 32. First telescopic section; 33. Second telescopic section; 34. Stopper; 35. Heat plate; 36. First sub-cavity; 37. Second sub-cavity; 40. Connecting pipe; 50. Second valve seat; 60. Second valve core; 71. Internal connecting pipe; 72. Pipe connection nut; 81. First sealing cap; 82. Second sealing cap. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figures 1 to 5 As shown, an embodiment of the present invention provides 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, the first valve core 20 can block or avoid the first opening; a sub-valve core 30, the sub-valve core 30 is connected to the first valve core 20, the sub-valve core 30 is a sealing structure, and the sub-valve core 30 is telescopically arranged toward the second opening. Among them, the sub-valve core 30 can be inserted into the pipeline matched with the first valve seat 10 after being extended to discharge the gas in the pipeline.

[0027] With this solution, when connecting the connecting valve and the pipeline, the extended sub-valve core 30 is inserted into the pipeline, so that the sub-valve core 30 occupies the space in the pipeline, so that the gas in the pipeline can be discharged, and the sub-valve core 30 can be retracted after assembly. The connecting valve is applied to the air-conditioning system to ensure the vacuum degree of the air-conditioning system. In this embodiment, expansion and contraction can be understood as expansion or contraction. The radial dimension of the sub-valve core 30 is smaller than the radial dimension of the first valve core 20, so that after the first valve core 20 avoids the first opening, the sub-valve core 30 will not hinder the fluid from flowing from the first opening into the first valve seat 10.

[0028] In this embodiment, the sub-valve core 30 has a sealed cavity, and the sealed cavity contains a fluid, which can change into a liquid state or a gas state according to temperature changes; wherein, the volume of the fluid expands in the process of changing into a gas state, so that the sub-valve core 30 is extended; the volume of the fluid shrinks in the process of changing into a liquid state, so that the sub-valve core 30 is shortened. In this way, the expansion or contraction of the sub-valve core 30 can be achieved by heating or cooling the sub-valve core 30 and the fluid in the sub-valve core 30. This solution has a simple structure and is easy to operate.

[0029] In this embodiment, the sub-valve core 30 includes 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 are both telescopically arranged, and the second telescopic section 33 is connected to the first valve core 20. This facilitates the connection of the second telescopic section 33 and the first valve core 20, and the sub-valve core 30 has a long telescopic range, which facilitates the exhaustion of gas in the pipeline.

[0030] Optionally, the first telescopic section 32 has a first sub-cavity 36, the second telescopic section 33 has a second sub-cavity 37, the first sub-cavity 36 and the second sub-cavity 37 are connected, and the first sub-cavity 36 and the second sub-cavity 37 form a sealed cavity.

[0031] In this embodiment, the radial dimension of the second telescopic section 33 is greater than the radial dimension of the first telescopic section 32. The first valve core 20 has a mounting cavity 21, the second telescopic section 33 is located in the mounting cavity 21, and the first telescopic section 32 is located outside the mounting cavity 21. By providing the mounting cavity 21, it is convenient to connect the second telescopic section 33 and the first valve core 20, and this arrangement has a compact structure, which can reduce the volume of the connecting valve.

[0032] Furthermore, the sub-valve core 30 further includes a stopper 34, which is disposed on the outer wall of the second telescopic section 33, and is located in the installation cavity 21. The installation cavity 21 has a limiting step 23, and the stopper 34 and the limiting step 23 are engaged in a stoppering manner. In this way, after the second telescopic section 33 is extended for a certain distance, the stopper 34 and the limiting step 23 abut against each other, thereby limiting the position of the second telescopic section 33 and preventing the second telescopic section 33 from falling out of the installation cavity 21.

[0033] In this embodiment, the first valve core 20 further has a guide cavity 22 connected to the installation cavity 21, the radial dimension of the guide cavity 22 is smaller than the radial dimension of the installation cavity 21, and at least a portion of the first telescopic section 32 is located in the guide cavity 22. The first telescopic section 32 can be guided by the guide cavity 22 so that the first telescopic section 32 can be telescoped in a predetermined direction.

[0034] Optionally, the outer wall of the first valve core 20 has a first sealing groove and a second sealing groove arranged at intervals, and a sealing ring is arranged in the first sealing groove and the second sealing groove, which can achieve a good sealing effect. The first valve core 20, the sub-valve core 30 and the second opening are coaxially arranged. The axis of the first opening is perpendicular to the axis of the second opening.

[0035] Optionally, the outer wall of the first valve core 20 is threadedly connected to the inner wall of the first valve seat 10, the first valve seat 10 has a first operating port, a tool can be inserted into the first operating port to rotate the first valve core 20, and the connecting valve further includes a first sealing cap 81, the first sealing cap 81 and the first valve seat 10 are detachably connected to block the first operating port. The first valve seat 10 has a limiting step, which cooperates with the stopper of the first valve core 20 to limit the movement range of the first valve core 20.

[0036] In this embodiment, the first telescopic section 32 and the second telescopic section 33 are both bellows structures, and the sub-valve core 30 further includes a heat receiving plate 35, which is connected to the second telescopic section 33. The bellows structure can facilitate the first telescopic section 32 and the second telescopic section 33 to telescope and have a relatively large telescopic distance in the axial direction. The heat receiving plate 35 is used to receive and transfer heat to accelerate the expansion of the sub-valve core 30.

[0037] Another embodiment of the present invention provides a connector, the connector includes a valve and the above-mentioned connecting valve, the valve includes a connecting pipe 40, the connecting pipe 40 is butted with the second opening of the connecting valve, wherein the sub-valve core 30 of the connecting valve is inserted into the connecting pipe 40 after being stretched to discharge the gas in the connecting pipe 40. With this solution, when the connecting valve and the connecting pipe 40 are connected, the stretched sub-valve core 30 is inserted into the connecting pipe 40, so that the sub-valve core 30 occupies the space in the connecting pipe 40, so that the gas in the connecting pipe 40 can be discharged, and the sub-valve core 30 can be retracted after assembly. The connector is applied to an air-conditioning system to ensure the vacuum degree of the air-conditioning system.

[0038] 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 connecting pipe 40 is connected to the third opening. By moving the second valve core 60, the pressure maintenance and communication of the pipeline can be achieved. After the second valve core 60 avoids the third opening and the first valve core 20 avoids the first opening, the connection valve and the valve can be connected.

[0039] Optionally, the valve is a stop valve. The second valve core 60 is threadedly connected to the second valve seat 50. A third sealing groove is provided on the outer wall of the second valve core 60, and a sealing ring is provided in the third sealing groove. The second valve seat 50 has a second operating port, and a tool can be inserted into the second operating port to rotate the second valve core 60. The valve also includes a second sealing cap 82, which is detachably connected to the second valve seat 50 to block the second operating port.

[0040] Furthermore, the connector further comprises an inner connecting tube 71 and a pipe union nut 72, the pipe union nut 72 is connected to the pipe 40, one end of the inner connecting tube 71 is connected to the first valve seat 10 of the connecting valve, and the other end of the inner connecting tube 71 is stuck between the pipe union nut 72 and the pipe 40. The other end of the inner connecting tube 71 is a bell mouth structure. Through the above arrangement, a sealed connection between the valve and the connecting valve can be achieved.

[0041] Another embodiment of the present invention provides an air conditioner, which includes the above-mentioned connector. In this way, the air conditioner has a high vacuum degree and a good heat exchange effect. This solution can realize the self-emptying function of the connection structure between the internal and external units of the air conditioner. During the installation process, local emptying can be achieved by heating and / or cooling, which is easier to achieve. At the same time, after the installation is completed, when the sub-valve core reaches the operating temperature range of the air conditioner, the fluid in the sealing chamber at the emptying end is restored to liquid, the pressure is reduced, the sub-valve core is shortened, and the whole system can work and operate normally. Self-emptying reduces the professionalism of workers and equipment, reduces installation time, and reduces installation costs.

[0042] like Figure 4 As shown, this stage is the initial assembly stage. There is a low boiling point liquid in the sealing cavity. When the heated end of the sub-valve core is heated, the heat is transferred to the sealing cavity, the liquid in the cavity vaporizes and expands, the internal pressure increases, and the extended end is driven to extend toward the valve (stop valve) end. After the second sub-cavity of the sub-valve core expands to a certain distance, the stopper contacts the valve body, and the second sub-cavity stops moving forward. At this time, the first sub-cavity can still move forward and extend to a predetermined length. During assembly and connection, the emptying end (i.e., the sealing section) is inserted into the connecting pipe of the stop valve to empty the inside of the stop valve. At this time, align the bell mouth of the internal connecting pipe with the stop valve connecting pipe, tighten the stop valve nut, and seal the stop valve and the connecting valve through a hard seal.

[0043] When the heating stops, the gas in the elastic sealing cavity gradually liquefies, the pressure in the elastic sealing cavity decreases, and the volume shrinks, causing the extended end to retract from the stop valve end.

[0044] Usually, a liquid with a boiling point of 60 to 120°C at normal temperature and pressure is selected in the sub-valve core. When the temperature is greater than the boiling point, the liquid begins to vaporize.

[0045] like Figure 5 As shown, at this stage, the connecting valve and the stop valve are connected, and the bell mouth and the stop valve pipe are sealed and connected 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 connecting pipes of the internal and external units and the suction (or exhaust) of the compressor are connected. Because the refrigerant pressure in the connecting pipe of the compressor is about 1.5MPa when it is not working (at 20℃, the pressure when the R32 refrigerant system is not running), which is much greater than the pressure inside the sealing chamber of the sub-valve core of the connecting valve (generally 1 atmosphere is selected at room temperature), at this time, the exhaust end of the sub-valve core can be further compressed. When the system starts to run, the pressure in the pipe will be higher, the pressure outside the sub-valve core will increase, and the sealing chamber will be compressed to the minimum. At this point, the indoor and outdoor units of the air conditioner are connected through the connecting pipe and operate normally.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connecting valve, characterized in that: include: A first valve seat (10), the first valve seat (10) having a first opening and a second opening; A first valve core (20) is movably disposed in the first valve seat (10), and the first valve core (20) can block or avoid the first opening; a sub-valve core (30), the sub-valve core (30) being connected to the first valve core (20), the sub-valve core (30) being a sealing structure, and the sub-valve core (30) being telescopically arranged toward the second opening; When the connecting valve and the pipeline are connected, the extended sub-valve core (30) is inserted into the pipeline, so that the sub-valve core (30) occupies the space in the pipeline, thereby discharging the gas in the pipeline, and the sub-valve core (30) is retracted after assembly.

2. The connecting valve according to claim 1, characterized in that: The sub-valve core (30) has a sealed cavity, in which a fluid is contained, and the fluid can change into a liquid state or a gaseous state according to temperature changes; wherein the volume of the fluid expands during the process of changing into a gaseous state, so that the sub-valve core (30) is extended; and the volume of the fluid decreases during the process of changing into a liquid state, so that the sub-valve core (30) is shortened.

3. The connecting valve according to claim 1, characterized in that: The sub-valve core (30) comprises a sealing section (31), a first telescopic section (32) and a second telescopic section (33) which are connected in sequence; the first telescopic section (32) and the second telescopic section (33) are both telescopically arranged; and the second telescopic section (33) is connected to the first valve core (20).

4. The 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 core (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 stopper (34), wherein the stopper (34) is arranged on the outer wall of the second telescopic section (33), the stopper (34) is located in the installation cavity (21), a limiting step (23) is provided in the installation cavity (21), and the stopper (34) and the limiting step (23) are engaged in a stop manner.

6. The connecting valve according to claim 4, characterized in that: The first valve core (20) further comprises a guide cavity (22) connected to the installation cavity (21); the radial dimension of the guide cavity (22) is smaller than the radial dimension of the installation cavity (21); and at least a portion of the first telescopic section (32) is located in the guide cavity (22).

7. The connecting valve according to claim 3, characterized in that: The first telescopic section (32) and the second telescopic section (33) are both bellows structures, and the sub-valve core (30) further comprises a heat receiving plate (35), and the heat receiving plate (35) is connected to the second telescopic section (33).

8. A connector, characterized in that: The connector includes a valve and a connecting valve according to any one of claims 1 to 7, wherein the valve includes a connecting pipe (40), the connecting pipe (40) is connected to the second opening of the connecting valve, wherein the sub-valve core (30) of the connecting valve penetrates into the connecting pipe (40) after being extended to discharge the gas in the connecting pipe (40).

9. The connector according to claim 8, characterized in that: The valve further comprises a second valve seat (50) and a second valve core (60), wherein 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 connecting pipe (40) is in communication with the third opening.

10. The connector according to claim 8, characterized in that: The connector further comprises an inner connecting tube (71) and a pipe connecting nut (72), wherein the pipe connecting nut (72) is connected to the connecting tube (40), one end of the inner connecting tube (71) is connected to the first valve seat (10) of the connecting valve, and the other end of the inner connecting tube (71) is clamped between the pipe connecting nut (72) and the connecting tube (40).

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

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