KR100346634B1 - Service valve for freezer - Google Patents

Abstract

The present invention relates to a service valve for a refrigerating device that can completely prevent leakage of the injected refrigerant gas while providing a service for allowing refrigerant gas to be injected into the outdoor device in a refrigerating device including an outdoor unit and an indoor unit. The valve accommodation pipe, the two refrigerant circulation pipes and the refrigerant injection pipes are formed in different directions, and the valve accommodation pipes are screw-assembled with spindle valves to control the refrigerant circulation while allowing the injection and replenishment of the refrigerant. A service valve comprising: an inclined valve seat formed inside an refrigerant circulation pipe on one side of the valve body; A valve packing embedded in the open / close end of the spindle valve to have the same inclination angle as that of the valve seat; A pair of annular projections projecting symmetrically to an outer circumferential surface of the airtight packing installed in the packing groove formed at the upper end of the spindle valve and contacting the sliding surface of the valve accommodation tube together with the center of the airtight packing; A ring groove formed on the sliding surface of the valve accommodation tube; A valve release preventing snap ring installed in the ring groove of the sliding surface to prevent detachment of the spindle valve; And it is an invention characterized in that it comprises a fastening groove formed in the open state toward the outside on the bracket protruding symmetrically on the outside of the valve body.

Description

Service valve for freezer {Service valve for freezer}

The present invention relates to a service valve for a refrigerating device, which is capable of completely preventing leakage of the injected refrigerant gas while providing a service for allowing refrigerant gas to be injected into a freezing cycle in an outdoor unit in a refrigerating device including an outdoor unit and an indoor unit. .

In general, the refrigeration cycle of the refrigerating device is composed of a compressor for compressing the refrigerant gas in the gas state, a condenser for condensing and liquefying the refrigerant gas compressed in the compressor, and an expansion valve and an evaporator. Chinese air conditioners are installed in indoor and outdoor units.

The indoor unit of the air conditioner is equipped with an evaporator that cools hot air, and the outdoor unit is equipped with a condenser, a compressor, and a compressor that liquefy the refrigerant gas by exchanging heat with the outside air. It is connected to the refrigerant circulation pipe, the refrigerant circulation pipe is configured to install a service valve to inject the refrigerant gas or to replenish the consumed refrigerant, the service valve is usually installed on the outdoor unit side.

The prior art service valve is a valve body 500 consisting of a valve accommodation tube 100, two refrigerant circulation pipes 200, 300 and a refrigerant injection pipe 400 as shown in Figure 8, and the circulation of the refrigerant gas Consists of a spindle valve 600 for controlling the operation, the inside of the valve receiving tube 100 is a packing groove formed in the head portion of the spindle valve 600 toward the outside relative to the protruding step 101 A sliding surface 102 having a flat inner peripheral surface and a female thread portion 103 for screwing the male thread portion 602 of the spindle valve 600 is formed to maintain the airtightness by the packing 601 inserted therein, and the spindle When operating the opening and closing end 603 formed at the lower end of the valve 600 to be seated on the valve seat 201 formed in the one side refrigerant circulation pipe 200, the service valve is closed, the opening and closing end 603 is When the valve seat 201 is operated loosely, open the service valve. And, the upper end of the valve accommodation tube 100 is formed by the extension portion 104 is processed to be inclined inward after the installation of the insertion of the spindle valve 600 spindle valve 600 is the valve accommodation tube 100 ) To prevent them from leaving.

Next, the one side refrigerant circulation pipe 200 is welded to the connection pipe 202 connected to the indoor air-side tube, the other refrigerant circulation pipe 300 by using a cap nut 301 another indoor air-side tube It is configured to connect or to install a sealing cap (not shown).

Next, a refrigerant injector 401 is installed in the refrigerant injection pipe 400 to block the outflow of the refrigerant gas injected while allowing the refrigerant gas to be injected.

Although not shown, the valve body 500 is integrally formed with a bracket for fixing the service valve to the outdoor unit.

However, the conventional service valve configured as described above has the following problems.

First, the opening and closing end 603 of the spindle valve 600 is exposed to the outside can be precisely processed by the outer diameter cutting, while the valve seat 201 formed in one refrigerant circulation pipe 200 is a valve Since it is formed inside the main body 500, the internal and external cutting process must be performed, so that the precision of the precision is lowered, so that the closing end 603 of the spindle valve 600 can be accurately seated on the valve seat 201. It is difficult to expect, which will soon cause the problem that the refrigerant gas is leaked to the outside during installation or movement of the air conditioner,

Second, the thinner extension portion 104 formed at the upper end of the valve accommodation tube 100 is maintained in an upright state so that the inner circumferential surface thereof coincides with the inner circumferential surface of the sliding surface 102 before the spindle valve 600 is inserted and installed. After the spindle valve 600 is inserted and installed, the extension part 104 is inclined toward the center so that the inlet of the sliding surface 102 is narrowed so that the spindle valve 600 is not separated from the sliding part 102. In addition to the cumbersome processing work to pressurize, when the inclined processing is more than necessary during the pressure processing of the softening section 104, there is a risk that the extension portion 104 is broken, there is a possibility that the spindle valve If the extension 104 that was inclined to be replaced is expanded to its original state and then the newly replaced spindle valve is inserted, then the extension 104 is inclined again to be extended. 4) is a problem that is broken because of fatigue because the valve body 500 itself must be replaced when the spindle valve is worn, it is pointed out that the problem is uneconomical,

Third, since the packing 601 installed on the outer peripheral surface of the upper head of the spindle valve 600 is in contact with the inner circumferential surface of the sliding surface 102 in a point contact state, there is a problem that it is difficult to expect accurate gas tight action of the refrigerant gas. ,

Fourth, in order to fix the valve body 500 to the outdoor unit side by inserting a bolt or screw into the hole formed in the bracket and attaching it by screw assembly, in the case of replacing the valve body 500, The valve body 500 can be removed from the outdoor unit only by completely screwing the screw out of the hole of the bracket, and it is pointed out that it is very cumbersome and requires a lot of time and effort to completely unscrew the bolt or screw. It is becoming.

The present invention was created to solve the problems described in the prior art as described above, by forming the valve seat of the valve body and the opening and closing end of the spindle valve to the inclined surface to widen the contact area and further the valve packing to the opening and closing end of the spindle valve The main purpose of this is to provide a service valve that can maintain a more airtight state when the spindle valve is closed, and can also expect airtightness of the closed operation even when the valve seat is not precisely processed. In addition, when the spindle valve inserted into the valve receiving pipe is worn, for example, the valve body is not damaged or damaged when the opening or closing part of opening and closing the valve seat or the seal that contacts the inner circumferential surface of the sliding surface is worn. There is a different purpose, The airtight packing installed on the outer circumferential surface of the spindle valve top provides a tight packing to maintain a more secure airtight state with the inner circumferential surface of the sliding surface, and furthermore, it is screwed to the outdoor unit through a bracket to fix and fix the valve body to the outdoor unit. The invention has been invented for another purpose in order to more quickly perform the attachment work of the service valve by removing the valve body even if the assembled bolt or screw is not completely unscrewed.

The present invention as a means for achieving the above object,

A valve receiving tube, two refrigerant circulation tubes, and a refrigerant injection tube are formed in different directions based on the valve body, and the valve accommodation tube is screw-assembled with a spindle valve to control the circulation of the refrigerant while injecting and replenishing the refrigerant. A service valve configured to allow

An inclined valve seat formed at an inner side of the refrigerant circulation tube in linear communication with the valve accommodation tube, the portion facing the valve accommodation tube being wider and the opposite side thereof narrow;

An opening and closing end of the spindle valve formed at the same inclination angle as that of the valve seat;

A valve packing embedded so that only the outer surface is exposed to coincide with the inclined outer circumferential surface of the spindle valve open / close end; And

It is installed in the packing groove formed on the upper end of the spindle valve, and has a pair of annular projections in contact with the center of the outer circumference in contact with the sliding surface of the valve accommodation tube and in contact with the sliding surface, such as the center Confidential packing;

It is characterized by consisting of

In addition, it is elastically detachably installed in the ring groove formed on the sliding surface of the valve receiving tube on the upper side to constitute a valve release prevention snap ring to prevent the departure of the spindle valve, and to the bracket protruding symmetrically on the outside of the valve body Characterized in that the fastening groove formed in the open state toward the outside.

1 is a perspective view of the present invention.

2 and 3 is a cross-sectional view of the service valve assembled state of the present invention,

2 is a state in which the service valve is closed,

3 is a state in which the service valve is open.

Figure 4 is an enlarged cross-sectional view of the valve seat of the spindle valve as a main part of the present invention.

5 is a cross-sectional view taken along line A-A of FIG.

Section view of snap ring operation.

6 is an enlarged cross-sectional view of a valve packing which is an essential part of the present invention.

Figure 7 is a state of use of the bracket of the valve body which is the main part of the present invention.

8 is a cross-sectional view of a service valve of the prior art.

※ Explanation of code for main part of drawing

1: Valve body 2: Valve accommodation pipe

3,4: refrigerant circulation pipe 5: refrigerant injection pipe

6: spindle valve 7: airtight packing

8 Bracket 21 Protrusion Step

22: sliding surface 23: female thread

24: Male thread 25,41,52: Cap nut

26: ring groove 27: snap ring for valve release prevention

31,44: circulation passage 32: valve seat

51 core valve 62 head

63: opening and closing end 65: valve packing

71: center 72: annular protrusion

81: Fastening groove

Exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of the present invention, Figures 2 and 3 is an assembled state sectional view showing the operating state of the spindle valve of the service valve of the present invention, Figure 4 is an essential part of the present invention, the enlarged cross-sectional view of the valve seat of the spindle valve 5 is a cross-sectional view taken along line AA of FIG. 2, which is a cross-sectional view of an operation state of a valve release preventing snap ring, which is an essential part of the present invention, and FIG. 6 is an enlarged cross-sectional view of a valve packing that is an essential part of the present invention, and FIG. Figure showing the use state of the bracket body of the valve body,

Reference numeral 1 denotes a valve body, and the valve body 1 is integrally formed with a valve accommodation tube 2, two refrigerant circulation tubes 3, 4 and a refrigerant injection tube 5.

The inner circumferential surface of the valve accommodation tube 2 is divided into a flat sliding surface 22 and a female screw portion 23 based on the protruding step 21, and the inner diameter of the sliding surface 22 is an internal diameter of the female screw portion 23. It is formed larger.

After inserting and installing the spindle valve 6 into the sliding surface 22 and the female threaded portion 23 of the valve accommodation tube 2, the cap nut 25 is screwed into the male threaded portion 24 of the outer circumferential surface so that foreign substances Prevent entry

In addition, a valve release preventing snap ring 27 having one side open to the ring groove 26 is detachably installed on the sliding surface 22 of the valve accommodation pipe 2.

The spindle valve 6 is a male screw portion 61 screwed to the female screw portion 23, the head 62 located on the sliding surface 22 and the opening and closing end 63 for opening and closing operation. Although configured, the packing groove 64 of the head 62 is provided with an airtight packing 7 to be slidably in contact with the sliding surface 22.

A pair of annular projections 72 protrude symmetrically on both sides of the outer circumferential surface of the hermetic packing 7, ie, the central portion 71 in contact with the sliding surface 22, and the annular protrusion 71 is hermetically sealed. While being in close contact with the sliding surface 22 together with the central part 71 of (7), it is comprised so that the state which the airtight force of the said airtight packing 7 was heightened can be expected.

In addition, the opening and closing end 63 of the spindle valve 6 is formed to have the same angle of inclination as the valve seat 32 formed in the circulation passage 31 inside the refrigerant circulation pipe 3 on one side, and At the closed end 63, a valve packing 65 made of a high elastic rubber material is embedded so that the valve seat 32 can be more precisely sealed during the closing operation.

The one side refrigerant circulation tube (3) is connected to the connecting tube 33 for connecting the outdoor unit side tube 34, the cap nut 41 is assembled to the other refrigerant circulation tube (4) is the indoor unit side tube It is configured to connect the 42 or to block the circulation passage 44 by pressing the sealing cap 43.

Next, the valve packing 65 also has the same inclination angle as the open / close end 63 and is embedded in the exposed state of only the outer surface, and is configured of the same inclined surface as the valve seat 32 described above.

In addition, a core valve 51 is installed in the refrigerant inlet pipe 5 to allow the injection of the refrigerant gas, but does not permit the outflow of the refrigerant gas, and a cap nut that protects the core valve 51 is disposed outside. 52) is screwed in.

Next, the bracket 8 protruding from both sides of the valve body 1 is formed with a fastening groove 81 open toward the outside, and the fastening groove 81 is easy to attach and detach the valve body 1. It shows the characteristic to let. That is, in the case where the attachment hole into which the bolt or the screw 82 for screwing the valve body 1 is assembled is formed in the area of the fastening groove 81, the valve body 1 can be attached. In addition, the fastening cabinet groove 81 is one side is open, so that the bolt or screw 82 can be attached or disassembled in a state of screw assembly to some extent, so that the detachable operation can be performed quickly.

Referring to the operation of the present invention as a member as follows.

A refrigeration unit composed of an indoor unit and an outdoor unit, such as an air conditioner, is equipped with a service valve for injecting refrigerant gas, and the service valve is usually installed in an outdoor unit. As the spacing of the mounting holes is not constant but slightly different, the bracket 8 formed in the valve body 1 of the present invention is formed with a fastening groove 81 which is open at one side. When the ball is in the region of the fastening groove 81 formed in the bracket 8 on both sides, the bolt body or the screw 82 can be screwed together, so that the valve body 1 can be easily attached and the valve body 1 When dismantling the screws (82) of any one of the bolts or screws (82) of both sides installed in the fastening groove (81) of both brackets (8) is completely unscrewed Body and screw 82 of the other side is only slightly it is possible to dismantle the valve body (1) in a screw loosening state shows a characteristic with easy disassembly.

In order to move the indoor unit and the outdoor unit in a state where the air conditioner is installed, the spindle valve 6 is closed as shown in FIG. 2 to close the circulation passage 31 of the refrigerant circulation pipe 3 and the other side. When the cap nut 41 is screwed to the circulation passage 44 of the refrigerant circulation tube 4 in close contact with the sealing cap 43, the circulation passage 44 is in a closed state. In the state in which the valve 6 is closed, the valve packing 65 embedded in the inclined opening / closing end 63 is in close contact with the inclined valve seat 32 of the one side refrigerant circulation pipe 3 in a surface contact state. The operation of closing the circulation passage 31 more precisely can be expected. Therefore, in the process of separating and moving the indoor unit and the outdoor unit, the phenomenon that the refrigerant gas injected into the outdoor unit is not leaked.

After the installation of the air conditioner is completed, when the indoor unit tube 42 connected to the indoor unit is to be connected to the outdoor unit, the airtight cap 43 which has closed the circulation passage 44 of the other refrigerant circulation pipe 4 is removed and the cap nut ( 3) and then as shown in FIG. 3, the spindle valve 6 is opened and operated, wherein the head 62 of the spindle valve 6 opened is the sliding surface 22 of the valve accommodation tube 2. The spindle valve 6 is operated even if the spindle valve 6 is opened more than necessary by the user's carelessness because it is caught by the valve release preventing snap ring 27 inserted into the ring groove 26 formed in the upper part. Phenomenon deviating from the accommodation pipe (2) does not occur.

In the state in which the spindle valve 6 is opened as described above, the refrigerant gas of the indoor unit flows into the valve body 1 through the circulation passage 44 of the other refrigerant circulation pipe 4 through the indoor unit tube 42. Through the circulation passage 31 and the connection tube 33 of the refrigerant circulation pipe 3 to the outdoor unit tube 34, the airtight action of the service valve is the packing groove formed in the head of the spindle valve (6) The airtight packing 7 fitted to the 64 is in charge, and the airtight packing 7 has a pair of annular projections 72 protruding on both sides as well as the center 71 as shown in the enlarged view of FIG. Since the state is in close contact with the sliding surface 22 together, the contact area between the airtight packing 7 and the sliding surface 22 is increased, thereby increasing the airtight force.

Therefore, it is possible to completely prevent the phenomenon that flows out in the process of circulating the refrigerant gas by opening the spindle valve (6).

On the other hand, when the airtight packing 7 installed in the head part 62 of the spindle valve 6 or the valve packing 65 embedded in the opening / closing end 63 is worn out and the cap packing 25 is to be replaced, the cap nut 25 is removed. Then, when the snap ring 27 for preventing valve release is pinched by using a forceps, the snap ring is released from the ring groove 26, so that the spindle valve 6 can be loosened from the valve accommodation pipe 2 and worn. The airtight packing 7 and the valve packing 65 or the spindle valve (6) as a means to replace the valve body (1) is a feature that can be reused.

According to the present invention as described above, the valve seat formed in the refrigerant circulation pipe on one side of the valve body is configured to be inclined, and the opening and closing end of the spindle valve is also inclined so that the contact area between the valve seat and the opening and closing end is widened and simultaneously opened. As a means of embedding the valve packing at the closed end, it can increase the airtight force at the open / close end when the spindle valve is closed. Therefore, it prevents the leakage of refrigerant gas injected into the outdoor unit in the process of separating and moving the indoor unit and the outdoor unit. In addition, a pair of annular protrusions on the outer circumferential surface of the airtight packing installed on the head of the spindle valve are pressed against the sliding surface of the valve accommodation tube together with the center of the outer circumferential surface of the airtight packing, thus completing the installation of the indoor and outdoor units. After the spindle valve is opened, the refrigerant gas circulating in both refrigerant circulation pipes Not only can the effect be prevented from leaking to the head of the valve, but the valve release prevention snap ring installed on the upper side of the sliding surface of the valve receiving pipe can be detached. In addition to preventing the deviating phenomenon, it is possible to replace the valve body when the valve packing, hermetic packing or spindle valve wear, so that the valve body can be reused, and one side open to the bracket of the valve body Long hole is an invention that has the effect of facilitating the attachment and disassembly of the valve body.

Claims (3)

A valve receiving tube, two refrigerant circulation tubes, and a refrigerant injection tube are formed in different directions based on the valve body, and the valve accommodation tube is screw-assembled with a spindle valve to control the circulation of the refrigerant while injecting and replenishing the refrigerant. A service valve configured to allow Valve packing is embedded so that only the outer surface is exposed on the inclined outer peripheral surface of the opening and closing end of the spindle valve to be in close contact with the inclined valve seat formed in the inner side of the one side refrigerant circulation tube in direct communication with the valve receiving tube and; It is installed in the packing groove formed on the upper end of the spindle valve, and has a pair of annular projections in contact with the center of the outer circumference in contact with the sliding surface of the valve accommodation tube and in contact with the sliding surface, such as the center Confidential packing; A valve release preventing snap ring installed elastically in a ring groove formed on an upper side of a sliding surface of the valve accommodation tube to prevent the spindle valve from being separated; Service valve for a refrigeration machine, characterized in that consisting of. delete The method of claim 1, A service valve for a refrigerating device, characterized in that a fastening groove is formed on the outside of the valve body in a symmetrically protruding bracket to be opened outward.