CN109505991B

CN109505991B - Active-control universal refrigerant charging valve adapter

Info

Publication number: CN109505991B
Application number: CN201910027514.9A
Authority: CN
Inventors: 段彦军; 黄顺银; 朱宁; 王江; 任楠
Original assignee: Beijing Machinery Equipment Research Institute
Current assignee: Beijing Machinery Equipment Research Institute
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2021-01-01
Anticipated expiration: 2039-01-11
Also published as: CN109505991A

Abstract

The invention relates to a refrigerant charging valve adapter, belongs to the technical field of refrigeration, air conditioning and heat pumps, and solves the problems that the existing universal charging valve can easily cause leakage of refrigerant and lubricating oil and can injure operators in the use process. The invention relates to an adapter of a refrigerant charging valve, which comprises an adapter main body; the adapter body comprises an upper end, a lower end and a third end; the thimble is arranged at the upper end and penetrates through the adapter body and moves along the axial direction of the adapter body; a first general filling valve is arranged at the third end and connected with refrigerant equipment; the lower end is provided with a universal interface; a second universal filling valve used for connecting the external cooling equipment; the thimble moves up and down along the direction of the axis of the adapter body so as to close and open the second universal filling valve. The invention is used for avoiding refrigerant leakage and operator injury.

Description

Active-control universal refrigerant charging valve adapter

Technical Field

The invention relates to the technical field of refrigeration, air conditioning and heat pumps, in particular to an actively-controlled universal charging valve adapter for a refrigerant.

Background

The current vapor compression refrigeration and heat pump technology occupies most of the share of the refrigeration and heating market and still has irreplaceable effects in the long future. Vapor compression refrigeration and heat pump technology, however, inevitably uses refrigerant as the working medium and thus faces refrigerant charging problems.

At present, when refrigerant is filled, a universal filling valve welded on a system is connected with a refrigerant tank, a vacuum pump, a pressure gauge and the like through a connecting hose to form a filling channel. Because the pressure in the system is positive, the pressure is different according to different refrigerant types, the pressure of the high-pressure refrigerant can reach dozens of atmospheric pressures, and in the process of connecting the connecting hose and the universal charging valve, although the opening time of the universal charging valve is short, the refrigerant leakage can be inevitably generated. Refrigerant leakage can cause a number of problems:

(1) frostbite: the refrigerant can be quickly evaporated after leakage, and the hands can be frostbitten if the refrigerant is sprayed on the hands;

(2) environmental pollution: most refrigerants have a greenhouse effect or destroy the ozone layer;

(3) leakage of lubricating oil: lubricating oil and refrigerant dissolve mutually in the system, and some lubricating oil can be carried to the refrigerant in-process of revealing, and the system performance descends can be led to lubricating oil disappearance in the system, can directly damage the compressor when serious, receives factor influences such as operating space, operation proficiency moreover, can cause the refrigerant to reveal in a large number in many times, and is very unfavorable to the routine maintenance of system.

The invention aims to solve the defect that the general filling valve cannot be actively controlled.

Disclosure of Invention

In view of the foregoing analysis, an embodiment of the present invention is directed to provide an adapter of an actively controllable universal refrigerant charging valve, so as to solve the problem that the conventional universal charging valve cannot be actively controlled to open or close, which not only easily causes leakage of refrigerant and lubricating oil, but also may cause injury to an operator during use.

The purpose of the invention is mainly realized by the following technical scheme:

in one aspect, the invention provides a refrigerant charging valve adapter, which comprises an adapter main body and a thimble; the adapter body is provided with an upper end, a lower end and a third end; the third end is vertically arranged in the axial direction of the adapter body; the thimble penetrates through the upper end of the adapter main body and can move up and down along the axis direction of the adapter main body; a first general filling valve is arranged at the third end and is used for being connected with refrigerant equipment; the lower end of the cooling device is provided with a universal interface which is used for connecting a second universal filling valve on external cooling equipment; the spike is used to open and close the second universal fill valve.

Furthermore, the first and second universal filling valves comprise a valve body and a valve core, the valve core is arranged in the valve body, a spring is arranged on the valve core, one end of the spring is abutted against the valve core, and the other end of the spring is abutted against the valve body; the first universal fill valve has an open state and a closed state.

Further, external force is applied to the first valve core or the second valve core, the first general filling valve or the second general filling valve is in an opening state, when the valve core is subjected to the external force, the valve core forms a filling channel in the valve body, and refrigerant passes through the filling channel.

Further, the first or second universal charging valve is in a closed state, the valve core is in the closed state under the action of the spring, the charging channel is closed, and refrigerant leakage is prevented.

Furthermore, the ejector pin is provided with an external thread, the upper end of the filling valve adapter is provided with an internal thread, and the ejector pin is connected with the adapter main body through the thread.

Furthermore, a thimble coaxial rotating disc is arranged at the upper end of the thimble and used for controlling the thimble to move along the axis direction of the adapter main body.

Further, the first universal filling valve is connected with a refrigerant device through a hose, and the refrigerant device is used for providing refrigerant.

Further, the refrigerant equipment is a refrigerant tank, a vacuum pump or a pressure gauge.

In another aspect, the present invention further provides a method for filling a refrigerant by using a refrigerant filling valve adapter, where the method for filling a refrigerant by using the refrigerant filling valve adapter includes the following steps:

s1, rotating a thimble coaxial rotating disc to lift a thimble and connecting an adapter of a filling valve adapter with a second universal filling valve on cooling equipment;

s2, connecting a first universal filling valve on the adapter with refrigerant equipment;

s3, rotating the coaxial turnplate to descend the thimble and opening an internal channel of the adapter; refrigerant is charged into the cooling apparatus from the refrigerant tank through the first universal charging valve, the adapter internal passage, and the second universal charging valve.

S4, after the refrigerant is filled into the external equipment, rotating the thimble coaxial turntable, lifting the thimble, and closing a refrigerant filling channel;

s5, refrigerant equipment connected with the first universal filling valve is disassembled, a second universal filling valve connected with the lower end of a filling valve adapter is disassembled, and a refrigerant filling process is completed.

Compared with the prior art, the invention has the following beneficial effects:

a) the ejector pin is arranged at the upper end of the filling valve adapter, the universal interface is arranged at the lower end of the filling valve adapter and is used for being connected with a second universal filling valve on cooling equipment, the second universal filling valve is opened and closed through the ejector pin, therefore, refrigerant and lubricating oil in the cooling equipment are prevented from leaking, and the second filling valve can be opened and closed actively in the connecting and detaching processes of the second filling valve.

b) Adopt threaded connection between the upper end of adapter main part and the thimble, not only can be simple and convenient reciprocate the thimble, can also realize filling the good leakproofness of fill valve adapter.

c) The top end of the ejector pin is provided with the ejector pin coaxial rotating disc, so that the ejector pin can be further conveniently rotated, and the flexibility of operation of the adapter of the filling valve is improved.

d) The adapter structure of the filling valve provided by the invention is simple, is not influenced by the operation space and the operation proficiency, and can avoid personnel frostbite caused by refrigerant leakage.

In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic diagram of a fill passage of a universal fill valve in a closed state;

FIG. 2 is a schematic diagram of a fill passage of the universal fill valve in an open state;

FIG. 3 is a schematic diagram illustrating a lift-up state of a pin of an adapter of a fill valve according to the present invention;

FIG. 4 is a schematic diagram illustrating a lowered state of a spike of an adapter of a fill valve according to the present invention;

FIG. 5 is a schematic diagram of a fill passage in a closed state after a fill valve adapter is connected to a second universal fill valve;

fig. 6 is a schematic diagram of a filling channel in an open state after the adaptor of the filling valve is connected to the second universal filling valve.

Reference numerals:

1-an adapter body; 2-thimble coaxial rotating disc; 3-a thimble; 4-a first universal fill valve; 5-general interface.

Detailed Description

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.

Example one

The invention discloses a refrigerant charging valve adapter, which comprises an adapter main body 1 and a thimble 3; the adapter body 1 is provided with an upper end, a lower end and a third end; the third end is vertically arranged in the axial direction of the adapter body 1; the thimble 3 penetrates through the upper end of the adapter body 1 and can move up and down along the axis direction of the adapter body 1; a first universal charging valve 4 is arranged at the third end, and the first universal charging valve 4 is used for being connected with refrigerant equipment; the lower end of the cooling device is provided with a universal interface 5, and the universal interface 5 is used for connecting a second universal filling valve on external cooling equipment; the needle 3 is used to open and close the second universal filling valve.

In practice, as shown in fig. 3 to 6, the charging valve adapter includes an adapter main body 1, the adapter main body 1 is a hollow cylindrical structure, and the adapter main body 1 is provided with an upper end, a lower end and a third end; the upper end of the thimble 3 is positioned above the adapter main body 1, and one end of the thimble extends into the adapter main body 1 through the upper end of the adapter main body 1 and corresponds to the universal interface 5 at the lower end; the third end is arranged on the outer side of the adapter body 1, and a first universal charging valve 4 is arranged on the third end and is used for connecting refrigerant equipment; the lower end is arranged below the adapter body 1, a universal interface 5 is arranged on the adapter body, and the universal interface 5 is used for connecting a second universal filling valve on external cooling equipment. When a filling valve adapter is used for filling refrigerant, firstly, the thimble 3 is lifted towards the direction far away from the upper end of the adapter main body 1 so as to prevent the thimble 3 from touching a second general filling valve on cooling equipment; then, connecting a first universal filling valve 4 on a third end of the adapter body 1 with refrigerant equipment, and connecting a universal interface 5 with a second universal filling valve on cooling equipment; and finally, the thimble 3 is downwards arranged, and a filling channel on a second general filling valve on the external cooling equipment is opened, so that the refrigerant in the refrigerant equipment is filled into the refrigeration equipment through the first general filling valve 4, the filling channel inside the adapter main body 1 and the filling channel formed by the second general filling valve, and the filling of the refrigerant is completed.

During refrigerant among the prior art fills and annotates, will weld the general filling valve on refrigeration plant and refrigerant equipment through the coupling hose mostly and couple together, form and fill the passageway, because be the malleation in the refrigeration plant, according to the difference of refrigerant, the inside pressure of refrigeration plant is also different, especially high-pressure class refrigerant pressure can reach dozens of atmospheric pressure, in coupling hose and general filling valve connected process, because receive operating space, factors such as operation proficiency degree influence, although the opening time of general filling valve is very short, but inevitable can produce the problem that the refrigerant revealed and then lead to producing a series of problems, for example: frostbite, environmental pollution and leakage of lubricating oil. The invention overcomes a series of problems, the thimble 3 is opened after the refrigerant is filled, the filling channel of the second general filling valve on the cooling device is closed by the thimble 3, and then the refrigerant filled in the cooling device is prevented from flowing back, thereby avoiding the leakage of the refrigerant and preventing the leakage of the lubricating oil. In addition, the charging valve adapter provided by the invention has a simple structure, and can be easily controlled by a manual switch; and will not receive the influence of operating space and operation proficiency, and above all, can avoid the operating personnel to leak the frostbite because of the refrigerant in the connection and dismantlement process.

The first universal filling valve 4 adopted by the invention comprises a valve body and a valve core, as shown in figures 1 and 2, the valve core is arranged in the valve body, a spring is arranged on the valve core, one end of the spring is abutted against the valve core, and the other end of the spring is abutted against the valve body; the universal fill valve includes an open state and a closed state. When the universal filling valve is in an open state, a filling channel is formed in the valve body and the valve core; when the universal filling valve is in a closed state, the valve body is contacted with the valve core, and the filling channel is closed.

In order to form the filling channel, external force is applied to the valve body of the first or second universal filling valve, the first or second universal filling valve is in an open state, when the valve core of the first or second universal filling valve is subjected to the external force, the filling channel is formed in the corresponding valve body, and refrigerant passes through the filling channel.

Specifically, when refrigerant is filled into the cooling device, the refrigerant is connected with a first general filling valve 4 through a hose, a valve core in the first general filling valve 4 moves downwards under the action of external force (such as impact pressure of the refrigerant on the valve core), as shown in fig. 1 and fig. 2, an annular gap, namely a filling channel, is formed between the valve core and a valve body, the refrigerant in the refrigerant device enters the adapter main body 1 through the filling channel, because the upper end of the adapter main body 1 is closed, the part of the refrigerant flows to the lower end of the adapter, a general interface 5 at the lower end is connected with a second general filling valve on the cooling device, a thimble 3 is lowered, the valve core in the second general filling valve is pressed down by the thimble 3, an annular gap, namely a filling channel, is formed between the valve core and the corresponding valve body, and the second general filling valve is opened, the refrigerant is filled into the cooling device from the adapter main body 1, the refrigerant charging process is completed.

After filling, stop to first or second general filling valve application external force, first or second general filling valve's valve body loses external force, and first or second general filling valve is the closed condition, and the case is in the closed condition under the spring action, seals filling channel, prevents that the refrigerant from leaking.

Specifically, after the refrigerant is filled into the refrigeration equipment, a filling switch on the refrigerant equipment is closed, the refrigerant is stopped being supplied into the first general filling valve 4, a valve core and a valve body in the first general filling valve 4 are contacted, and at the moment, the refrigerant equipment cannot fill the refrigerant into a filling valve adapter through the first general filling valve 4; meanwhile, the thimble 3 is lifted, the valve core and the valve body in the second general filling valve are contacted together under the action of the spring, and then the filling channel in the second general filling valve is closed, so that the leakage of refrigerant or the leakage of lubricating oil is prevented.

In order to prevent the refrigerant leakage at the upper end of the adapter body 1, an external thread is arranged on the ejector pin 3, an internal thread is arranged on the inner side of the upper end, and the ejector pin 3 is connected with the adapter body 1 through the thread. Specifically, a thimble 3 contact ring is arranged on the inner side of the upper end of the adapter body 1, the thimble 3 contact ring has good direct sealing performance with the inner side of the upper end, an internal thread is arranged on the inner side of the thimble 3 contact ring, an external thread is arranged on the thimble 3, and the thimble 3 contact ring move up and down through the thread by rotating the thimble 3. A gasket is provided at the upper end of the contact ring of the thimble 3, and the gasket can further prevent the refrigerant from leaking from the upper end of the adapter body 1.

In order to operate the thimble 3 more conveniently, the thimble 3 is moved in the filling valve adapter, a thimble coaxial rotating disc 2 is arranged on the thimble 3 outside the adapter body 1, and the thimble coaxial rotating disc 2 is used for controlling the thimble 3 to move along the axial direction of the adapter body 1. Specifically, the thimble 3 penetrates through the upper end of the adapter body 1, a thimble coaxial rotating disc 2 (or a rotating component such as a rotating handle) is arranged on the thimble 3 positioned outside the adapter body 1, when the thimble 3 needs to be lifted, the thimble coaxial rotating disc 2 is rotated, and the thimble 3 moves towards the direction far away from the second universal charging valve; when the thimble 3 needs to be lowered, the thimble coaxial rotating disc 2 is rotated, the thimble 3 moves towards the valve core direction of the second general charging valve, namely, the thimble 3 is lowered, downward pressure is applied to the valve core, a refrigerant channel is generated between the valve core and the valve body, namely, the thimble 3 pushes the valve needle open, and then, refrigerant flows into the refrigeration equipment from the cavity formed by the adapter main body 1.

The first universal filling valve 4 of the filling valve adapter is connected with refrigerant equipment through a hose; the refrigerant equipment is used for providing refrigerant for the refrigeration equipment.

Conventional refrigerant equipment includes a vacuum pump, a pressure gauge, a refrigerant tank, etc., which are not listed here.

In another aspect, the present invention further provides a method for switching a refrigerant filling valve adapter, wherein the refrigerant filling valve adapter is used for filling a refrigerant, and the method includes the following steps:

s1, rotating a thimble coaxial rotating disc 2 to lift a thimble 3; connecting a filling valve adapter with a universal filling valve on external equipment;

s2, connecting the refrigerant tank with a universal filling valve on the adapter;

s3, descending the thimble 3 by using the coaxial turntable, and opening an internal channel of the adapter; refrigerant is filled into the cooling equipment from a refrigerant tank through the first universal filling valve 4, the adapter internal channel and the second universal filling valve;

s4, after the refrigerant is filled into the external equipment, rotating the thimble coaxial turntable 2, lifting the thimble 3, and closing a refrigerant filling channel;

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention.

Claims

1. A refrigerant charging valve adapter is characterized by comprising an adapter main body and a thimble; the adapter body is provided with an upper end, a lower end and a third end; the third end is vertically arranged in the axial direction of the adapter body;

the ejector pin penetrates through the upper end of the adapter main body and can move up and down along the axis direction of the adapter main body; a first general filling valve is arranged at the third end and is used for being connected with refrigerant equipment; the lower end of the cooling device is provided with a universal interface which is used for connecting a second universal filling valve on external cooling equipment;

the thimble is used for opening and closing the second universal filling valve;

the first general filling valve and the second general filling valve both comprise a valve body and a valve core, the valve core is arranged in the valve body, a spring is arranged on the valve core, one end of the spring abuts against the valve core, and the other end of the spring abuts against the valve body; the first universal fill valve has an open state and a closed state;

the method comprises the following steps that external force is applied to a valve core of a first or second universal charging valve, the first or second universal charging valve is in an open state, when the valve core of the first or second universal charging valve is subjected to the external force, a charging channel is formed in a corresponding valve body, and refrigerant passes through the charging channel;

the valve core loses external force, the first or second universal charging valve is in a closed state, the valve core is in the closed state under the action of a spring, a charging channel is closed, and refrigerant leakage is prevented;

the thimble is provided with an external thread, the upper end of the charging valve adapter is provided with an internal thread, and the thimble and the adapter main body are connected through a thread; the inner side of the upper end of the adapter main body is provided with a thimble contact ring, the tightness of the thimble contact ring and the inner side of the upper end is good, the inner side of the thimble contact ring is provided with an internal thread, the thimble is provided with an external thread, the thimble is rotated, and the thimble contact ring move up and down through the thread; the upper end of the thimble contact ring is provided with a sealing gasket which is used for preventing a refrigerant from leaking from the upper end of the adapter main body;

the thimble upper end is equipped with the coaxial carousel of thimble, the coaxial carousel of thimble is used for controlling the thimble and removes along the axis direction of adapter main part.

2. A refrigerant charging valve adapter as recited in claim 1 wherein said first universal charging valve is connected to a refrigerant device for providing refrigerant via a hose.

3. A refrigerant charging valve adapter as recited in claim 2 wherein said refrigerant device is a refrigerant tank, a vacuum pump or a pressure gauge.

4. A method of filling a refrigerant using a refrigerant fill valve adapter, wherein the method comprises the steps of:

s3, rotating the coaxial turnplate to descend the thimble and opening an internal channel of the adapter; refrigerant is filled into the cooling equipment from the refrigerant tank through the first universal filling valve, the adapter internal channel and the second universal filling valve;

s4, after the refrigerant is filled into the external equipment, rotating the thimble coaxial turntable, lifting the thimble, closing the refrigerant filling channel and closing a refrigerant tank switch;