KR200171528Y1 - Service valve for freezer - Google Patents

Abstract

The present invention relates to a service valve used for injecting or replenishing refrigerant gas into a refrigerating device, such as an air conditioner, which is separated into an indoor unit and an outdoor unit, and includes a valve valve in which a spindle valve can be opened and closed by a valve body. In the service valve is formed in all four sides, the refrigerant circulation pipe to which the indoor unit tube is connected, the refrigerant circulation pipe to which the outdoor unit tube is connected, and the refrigerant injection pipe to which the core valve is installed, the spindle being inserted into the valve accommodation tube. It has a ring groove formed on the upper side of the sliding portion in the position to allow the opening and closing operation of the valve, the outer diameter fitted to the ring groove and the inner diameter smaller than the head of the spindle valve, one side is open to reduce the outer diameter to the ring groove A valve installed in the valve receiving pipe by configuring a valve release prevention ring that is detachably installed Is designed with the features that enable escape prevention ring can also prevent separation of the spindle, with the valve facilitate the replacement of the valve spindle.

Description

Service valve for freezer {Service valve for freezer}

The present invention relates to a service valve used for injecting or replenishing refrigerant gas to a refrigerating device, such as an air conditioner, which is separated into an indoor unit and an outdoor unit, and more specifically, inserting and installing a spindle valve for opening and closing a circulating operation of refrigerant gas. It is designed to feature the installation structure of the valve release prevention ring to prevent replacement after installation while enabling replacement installation.

In general, a refrigeration cycle of an air conditioner in which a indoor unit and an outdoor unit are separated in a refrigerating device is a compressor for compressing a gaseous refrigerant gas at a high temperature and a high pressure to support the circulation of the refrigerant gas, and the compressor is compressed at a high temperature and a high pressure. Condenser (Condenser) for condensing the refrigerant gas into a liquefied state, and the refrigerant gas liquefied in the condenser is removed through the receiver dryer to remove moisture and dust and then rapidly expand the liquefied refrigerant gas to low temperature, low pressure mist state It is composed of an expansion valve for injection and an evaporator for converting the hot air into cold air by vaporizing the refrigerant gas in the mist injected from the expansion valve to take heat away from the surrounding air, the refrigerant gas passed through the evaporator is a compressor again It is configured to repeat the circulation operation sent to the The outdoor unit of the air conditioner equipped with the air conditioner is equipped with a compressor that compresses the refrigerant gas heat-exchanged with hot air to a high temperature and a high pressure, and a condenser that cools the refrigerant gas into a liquefied state. The indoor unit includes an expansion valve and cooled air. The evaporator to blow air is attached.

In addition, the indoor unit and the outdoor unit are connected to a supply circulation line (pipe) for supplying refrigerant gas from a condenser to an evaporator (specifically, an expansion valve) and a recovery circulation line for recovering refrigerant gas from an evaporator to a compressor for circulation of the refrigerant gas. Each of the supply and return circulation lines is provided with a service valve.

The service valve has a function of injecting a refrigerant gas and a function of replenishing the refrigerant gas when it is consumed. The service valve is necessarily installed in an air conditioner, and is usually mounted on the outdoor unit side.

The prior art service valve has a valve accommodation pipe 200, two refrigerant circulation pipes 300, 400 and the refrigerant injection pipe 500 in all directions based on the valve body 100, as shown in FIG. Formed.

The inside of the valve receiving tube 200 has a large diameter and a flat sliding portion 201 and a small diameter female thread portion 202 to allow the insertion of the spindle valve 600 to control the circulation of the refrigerant gas. The male screw portion 601 of the spindle valve 600 is assembled to the female screw portion 202 to perform the opening and closing operation, and the packing 603 fitted to the outer circumferential surface of the head 602 is a sliding portion ( 201) is configured to be in close contact with the airtight operation, the spindle valve 600 is inserted into the valve receiving pipe 200 is installed in the valve receiving tube 200, due to the excessive opening operation after installation the spindle valve 600 itself valve receiving pipe In order to prevent the deviating from the (200) to the end of the valve receiving tube, that is, the sliding portion 201 is formed in the structure to form a thin extension portion 203, the extension portion 203 is the inner diameter Inside of this sliding part 201 After allowing the insertion and installation of the spindle valve 600 in a state consistent with the above, the extension of the spindle valve 600 by means of pressing the extension part 203 from the outside to be inclined into the sliding part 201. It is configured to prevent.

The opening and closing end 604 protruding from the male threaded portion 601 end of the spindle valve 600 is configured to open or close the valve seat 401 formed inside the refrigerant circulation 400, the refrigerant circulation pipe ( 400, the circulation tube for supplying (or recovering) the refrigerant gas to the outdoor unit of the air conditioner is connected, and the circulation tube for supplying (or recovering) the refrigerant gas to the indoor unit of the air conditioner is also connected to the other refrigerant circulation pipe 300, or An airtight cap (a member that seals the refrigerant circulation pipe when the indoor unit is to be separated from the outdoor unit and doublely seals the injected refrigerant gas and prevents foreign substances from penetrating at the same time) is installed.

The refrigerant injection pipe 500 is equipped with a core valve 501 that allows the injection of the refrigerant gas and controls the outflow of the refrigerant gas that has been injected once.

However, in the conventional service valve as described above, the packing 603 of the spindle valve 600, which is airtight while being compressed to the sliding part 201 of the valve accommodation tube 200, is worn out, and thus the airtight function is lost. When the open / close end 604 of the valve 600 is worn out and the spindle valve 600 is to be replaced with a new one, the extension part 203 formed at the front end of the valve accommodation tube 200 and pressed and inclined inwardly is opened. Only if it is upright again, the spindle valve 600 can be pulled out. If the straightened machined extension part 203 is bent to be inclined and then restored to its original state, the extension part (by the fatigue degree of metal) 203) The strength of the self itself is weakened, the problem that the extension 203 is damaged or broken occurs eventually occurs, and thus, when worn, such as packing or opening and closing end of the spindle valve 600 must be replaced In this case, it is pointed out that it is uneconomical because the service valve itself must be replaced without replacing the spindle valve.

The present invention has been devised to solve the problems in the prior art as described above, and the packing or opening of the spindle valve as a means for detachably installing the valve release prevention ring in the sliding portion without forming an extension at the tip of the valve accommodation tube. It is designed for the purpose of replacing only the spindle valve when the closed end is worn out.

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

The valve accommodating part for accommodating the spindle valve to be opened and closed on the basis of the valve body, the refrigerant circulation pipe to which the indoor unit tube is connected, the refrigerant circulation pipe to which the outdoor unit tube is connected, and the refrigerant injection pipe to which the core valve is installed, are everywhere. In the service valve formed of

A ring groove formed on an upper side of a sliding part at a position allowing opening and closing operation of the spindle valve inserted into the valve accommodation pipe;

A valve release prevention ring having an outer diameter fitted to the ring groove and an inner diameter smaller than the head of the spindle valve, and having one side open to reduce the outer diameter so that the ring groove is detachable from the ring groove;

It is characterized by consisting of.

1 is a cross-sectional view of the assembled state of the present invention.

Figure 2 is a plan view of the valve release prevention ring which is the main part of the present invention.

Figure 3 is a removable state of the valve release prevention ring of the present invention.

4 and 5 are cross-sectional view showing a valve release prevention structure 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: valve release prevention ring

21: sliding part 22: female thread

23: ring groove 24: sealing cap nut

41: valve seat 51: core valve

61: head part 62: male thread part

63: Packing groove 64: Confidential packing

65: opening and closing end 66: valve packing

71: open end

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of the assembled state of the present invention, Figure 2 is a plan view of the valve release prevention ring which is an essential part of the present invention, Figure 3 shows a detachable state of the valve release prevention ring of the present invention,

Reference numeral 1 denotes a valve body, wherein the valve body 1 has a valve accommodation tube 2, two refrigerant circulation tubes 3, 4 and a refrigerant injection tube 5 protruding in all directions. Formed.

The inside of the valve accommodation tube (2) is divided into a sliding portion 21 and a female threaded portion 22 having an inner circumferential surface so that the spindle valve 6 can be inserted and installed to be opened and closed by a screw type and simultaneously maintain airtightness. It is configured so that, the upper side of the sliding portion 21 of the valve accommodation tube is formed in the position to allow the opening and closing operation of the spindle valve (6) is formed with a ring groove 23, the ring groove 23 is a valve release It is comprised so that the prevention ring 7 may be installed.

The outer diameter of the valve release prevention ring (7) coincides with the inner diameter of the ring groove (23) while the inner diameter of the valve release prevention ring (7) is formed larger than the inner diameter of the sliding portion (21) of the spindle valve (6) It is configured to prevent the separation, and the valve escape prevention ring 7 is pressed on one side of the open and the both ends of the open end 71 is in close contact with each other when the outer diameter is elastically reduced in the ring groove 23 On the contrary, in the state in which both open ends 71 of the valve release preventing ring 7 are compressed, the two open ends 71 are inserted into the sliding part 21 to coincide with the ring groove 23. When the force is removed, the valve release prevention ring 7 is configured to be inserted into the ring groove 23 by its elastic restoring force. After the spindle valve 6 is installed inside the valve accommodation tube 2, the front end of the sliding portion 21 is sealed with a sealing cap nut 24.

The spindle valve 6 is composed of a head 61 which reciprocates only in the sliding part 21 and a male thread part 62 which is screwed to the female threaded part 22 so as to be opened and closed. The packing groove 63 formed in the 61 is a hermetic packing 64 is fitted, the hermetic packing 64 is configured to be pressed by the sliding type to receive a pressing force by the sliding portion 21 is configured to perform an airtight action.

In addition, the opening and closing end 65 of the spindle valve 6 is formed with an outer circumferential surface of the upper and lower narrow so as to have an inclination angle corresponding to the inclined surface of the valve seat 41 formed inside one refrigerant circulation tube (4), The closed end 65 is buried with a vertically narrow valve packing 66 seated on the inclined surface of the valve seat 41 so that the valve seat 41 can be hermetically closed during the closing operation of the spindle valve 6. Consists of.

An indoor unit tube is connected to the other refrigerant circulation tube 3 by a cap nut 31, and in some cases, the refrigerant circulation tube 3 may be sealed by a sealing cap (not shown).

In addition, a core valve 51 is installed in the refrigerant injection pipe 5 to allow the injection of the refrigerant as a one-way valve and to control the leakage of the refrigerant injected once.

The operation of the present invention configured as described above will be described.

First, when the spindle valve 6 installed in the valve receiving tube 2 of the valve body 1 is closed, the valve packing 66 embedded in the outer circumferential surface of the open / close end 65 is formed of the valve seat 41. Since the contact with the inclined surface can be expected to improve the airtight force, and thus the refrigerant circulation pipe (4) is to be in a hermetically closed state to prevent the leakage of the refrigerant gas.

Next, when the spindle valve 6 installed in the valve accommodation tube 2 of the valve body 1 is opened, the airtight packing 64 provided on the head 61 is the sliding portion of the valve accommodation tube 2. Since it is maintained in the state pressed by the (21) it is to prevent the leakage of the refrigerant gas circulated through both circulation pipe (3) (4).

As described above, the valve packing 66 or the number of the airtight packing 64 or the opening / closing end 65 which is fitted to the head 61 of the spindle valve 6 that opens and closes in the valve receiving tube 2 as described above. When the threaded portion 62 is worn out and does not function properly, the spindle valve 6 should be detached from the valve accommodation tube 2, in which case the cap nut screwed to the end of the valve accommodation tube 2 is used. (24) after unscrewing, and then inserts a tool such as a forceps into the sliding portion 21, and pulls the two open ends 71 of the valve release prevention ring (7) fitted in the ring groove 23 in close contact with each other. When pulled out, the valve release prevention ring 7 is retracted as the outer diameter is reduced (see the solid line in FIG. 3), and thus the valve release prevention ring 7 is relaxed in the ring groove 23, thereby preventing the valve release prevention ring ( 7) can be taken out from the sliding portion 21, in this way to close the valve release prevention ring (7) When the spindle valve 6 is removed from the valve accommodation tube 2, the spindle valve 6 may be detached from the valve accommodation tube 2, so that the spindle valve 6 may be easily replaced.

According to the present invention as described above is a simple structure that can be detachably installed in the ring groove formed on the upper side of the sliding portion of the valve receiving pipe detachable to the airtight packing or valve packing or male thread installed in the spindle valve when using the service valve In case of no function, only the spindle valve is removed and only the worn parts can be replaced, and the valve body can be reused as it is. This effect is equivalent to that when the spindle valve fails in the prior art. Compared to replacing the whole body, the valve body is a practical design that provides an economic advantage that can be used as it is.

Claims (1)

The valve accommodating part for accommodating the spindle valve to be opened and closed on the basis of the valve body, the refrigerant circulation pipe to which the indoor unit tube is connected, the refrigerant circulation pipe to which the outdoor unit tube is connected, and the refrigerant injection pipe to which the core valve is installed, are everywhere. In the service valve formed of A ring groove formed on an upper side of a sliding part at a position allowing opening and closing operation of the spindle valve inserted into the valve accommodation pipe; A valve release prevention ring having an outer diameter fitted to the ring groove and an inner diameter smaller than the head of the spindle valve, and having one side open to reduce the outer diameter so that the ring groove is detachable from the ring groove; Service valve for a refrigeration machine, characterized in that consisting of.