JPH0664075U - Refrigerant collector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a refrigerant recovery device that can easily recover a refrigerant from a device using the refrigerant with a small-sized and inexpensive facility. [Structure] A holder 2 having a through hole 13 in a side wall and fixed to a refrigerant pipe 1, and an inlet 16 communicating with the through hole of the holder 2.
A connector 15 fixed to the holder 2, a pin 21 and a pin 21 provided so as to project into the refrigerant pipe from the inlet 16 of the connector 15 and having a refrigerant discharge path 20 having a discharge port 18 communicating with the discharge pipe 17. A vacuum collecting can 34 having a pin pressing means 24 that pierces the inside of the refrigerant pipe and an opening / closing valve 40 in a communication portion 35 that communicates with the discharge pipe 17.
A refrigerant recovery device is configured from the above, whereby the refrigerant can be easily recovered from the device using the refrigerant by a small-sized and inexpensive facility.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a refrigerant recovery device used for discarding electric appliances such as household refrigerators and devices that use a refrigerant in a refrigeration circuit such as an automobile cooler.

[0002]

[Prior art]

 Small refrigerators such as refrigerators for home use and vending machines, and coolers for automobiles have a small amount of enclosed refrigerant, but they are widely used in general households and the number of them is the same. Therefore, since the amount of these devices that have reached the end of their useful life or are no longer needed after replacement, etc., will increase in a large amount annually, the refrigerant will be released into the atmosphere as it is in order to remove it from the discarded refrigerant circuit. If released, pollution such as destruction of the ozone layer will occur.

On the other hand, a large-scale refrigerating / refrigerating apparatus has a service port for maintenance attached to a part of the refrigerant circuit pipe, and the service port is used for replenishing the refrigerant or cleaning and exchanging the cooling medium. Is going. Therefore, when discarding these devices, it is possible to drain the refrigerant from this service port.

[0004]

[Problems to be solved by the device]

 However, general small refrigeration equipment and automobile coolers usually do not have such a service port. Therefore, recovery of these refrigerants is extremely difficult, and countermeasures against them are desired. ing.

Further, even if these small refrigeration equipments are provided with a service port, when the refrigerant is recovered from the service port when the equipment is discarded, the conventional large-scale refrigerant recovery device is an installed type. Since it is large and expensive, when disposing of a large amount of refrigerant equipment, which amounts to tens of millions of units annually, it is necessary to carry the refrigerant equipment to the place where there is a large-scale refrigerant recovery device, and transport it. It is costly and time consuming, and it is not practical to recover the refrigerant using such an expensive refrigerant recovery device.

Further, a conventional large-scale refrigerant recovery device pierces a refrigerant pipe with a needle-like end of a pipe whose one end is connected to a refrigerant recovery tank, and opens the end of the needle-like pipe. It has been proposed to use a device for recovering the refrigerant in a recovery tank.

However, in this device, a very large force is required to insert the needle-shaped tube into the inside from the outer wall of the copper tube, so that the equipment is inevitably large and expensive. Becomes In addition, the tip of the needle-shaped tube is easily crushed, the copper tube is not pierced by the recovery work several times, and it is necessary to replace the copper tube frequently.

Therefore, an object of the present invention is to provide a refrigerant recovery device that can easily recover a cooling medium from a device using a refrigerant with a small-sized and inexpensive facility.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a holder having a through hole in a side wall and fixed to a refrigerant pipe, and a refrigerant discharge path having an inlet communicating with the hole of the holder and an outlet communicating with the discharge pipe. A connector fixed to the holder, a pin projecting from the inlet of the connector into the refrigerant pipe, a pin pressing means for inserting the pin into the refrigerant pipe, and a communicating portion communicating with the discharge pipe. This is a refrigerant recovery device composed of a vacuum recovery can equipped with an on-off valve, so that the refrigerant can be easily recovered from the equipment using the refrigerant with a small and inexpensive facility. .

[0010]

[Action]

 Since the present invention is configured as described above, when the holder is fixed at an appropriate position in the refrigerant pipe of the device using the refrigerant and the pin is inserted into the refrigerant pipe by the pin pressing means, the cooling medium pipe is connected to the connector. When the pin is pulled out, the refrigerant in the refrigerant pipe passes through the refrigerant discharge passage of the connector to the discharge port, further passes through the discharge pipe, and reaches the discharge pipe communication part of the recovery can. At this time, when the on-off valve of the collection can is opened, the refrigerant in the collection can is sucked and collected by the vacuum in the collection can. After the collection work is completed, close the open / close valve of the collection canister and remove the holder from the refrigerant pipe.

[0011]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the holder 2 in the shape of a half cylinder corresponding to the refrigerant pipe 1 is composed of an upper holder 3 and a lower holder 10. The lower holder 10 is provided with a first flange 5 having a plurality of screw holes for screwing with the bolt 4 and a second flange 8 having a hooking portion 7 into which a second flange 6 of an upper holder 3 described later is fitted. Prepare

A first flange 12 having a plurality of holes 11 through which a bolt 4 can be inserted is provided in an upper holder 3 which is opposed to the lower holder 10 and has a cylindrical inner surface formed between the upper holder 3 and the lower holder 10. As described above, the second flange 6 that can be fitted into the hanging portion 7 of the lower holder 10 is provided. The upper holder 3 has a through hole 13 in the center thereof, and a screw hole 14 formed in the through hole 13 is screwed into a connector 15 provided with a screw on the outer periphery, so that the connector 15 is attached to the upper holder 3. It is fixed.

The connector 15 is provided with an L-shaped refrigerant discharge passage 20 having an inlet 16 communicating with the through hole 13 and a discharge port 18 communicating with the discharge pipe 17. A rod 22 having a pin 21 whose tip projects from the introduction port 16 is arranged in the refrigerant discharge passage 20 communicating with the introduction port 16, and a screw portion 23 provided on the upper portion of the rod 22 is attached to the screw portion of the connector 15. A thumbscrew 24 is provided at the tip of the rod 22 which is screwed together and extends upward from the screw portion 23 and projects from the connector 15. A sealing material 19 is sealed between the threaded portion of the connector 15 and the thumbscrew 24.

The lower holder 10 and the upper holder 3 are provided with flanges 25 at the both ends in the axial direction toward the inner side of the diameter, and the central portions thereof similarly project toward the inner side of the diameter. The upper holder 3 has the bulging portions 26 and 27, and the through hole 13 is formed in the bulging portion 27 of the upper holder 3. These flanges 25 and the bulges 26 and 27 form two packing accommodating portions 28 and 29. In the packing accommodating portions 28 and 29, when the holder 2 is fixed to the refrigerant pipe 1, a rubber packing 32 having a serrated end 31 as shown in FIG. As shown in the drawing, the two cylindrical packings 33 are formed so as to face each other in a semicircular shape and are housed.

The discharge pipe 17 connected to the discharge port 18 of the connector 15 is connected to the communication portion 35 of the recovery can 34, and the communication hole 35 of the communication portion 35 has a circulation hole 36 from the pipe 17 to the recovery can 34. A gas rubber 37 that acts as a check valve that allows the flow of gas to the inside and blocks the flow in the opposite direction is provided, and an on-off valve 40 that is opened and closed by a thumbscrew 38 protruding outside the collection can is provided. It is equipped so that it can be seated on the valve seat 39. There is.

When using the refrigerant recovery device having the above-described configuration, as shown in FIG. 4, the refrigerator 41 for removing the refrigerant gas is turned on to operate the compressor 42, and in that state, the condenser 43 and the expansion valve 44 are operated. The portion A of the low temperature liquid refrigerant pipe line 45 between and is closed and the pipe is closed.

When the condenser 43 is operated for several minutes depending on the size, most of the refrigerant including the refrigerant in the evaporator 46 is sent from the compressor 42 to the condenser 43 side. Then, the power is turned off, the portion B of the high temperature gas refrigerant pipe line 47 between the compressor 42 and the condenser 43 is crushed to close the pipe, and the refrigerant is confined between the portions A.

Next, with respect to the refrigerant pipe 19 in the portion C between the portion B and the condenser 43, the lower holder 10 is placed under the refrigerant pipe 19, and the packing 32 is accommodated in the packing accommodating portions 28, 29 in a semi-cylindrical shape. And make them abut. Next, similarly, the packing 32 is accommodated in the packing accommodating portion of the upper holder 3 and is covered above the lower holder 10. At this time, the serrated portions 31 of the upper and lower packings 32 mesh with each other, the second flange 6 of the upper holder 3 is fitted into the hanging portion 7 of the lower holder 10, and the first flange 5 of the lower holder 10 and the upper holder. The first flange 12 of the rudder 3 is rotated and pressed in the direction of approaching it.

The bolt 4 is inserted into the hole 11 formed in the first flange 12 of the upper holder 3, and the lower end thereof is screwed into the screw hole formed in the first flange 5 of the lower flange 10. When the bolt 4 is screwed in, the packing 33 is strongly pressed against the outer peripheral surface of the refrigerant pipe 1 to press the pipe to such an extent that the pipe is compressed and the diameter thereof is reduced. Fixed against.

Then, when the thumbscrew 24 is rotated, the rod 22 descends along the refrigerant discharge passage 20 due to the screwing of the screw portion 23, and the needle-like portion 21 at the tip thereof abuts the outer peripheral wall of the refrigerant pipe 1. To do. When it is screwed in further, the needle-shaped portion 21 is inserted into the pipe of the refrigerant pipe 1 made of copper, so that the hole 41 is opened in the refrigerant pipe 1. When the rod 22 is sufficiently screwed in, the thumbscrew 24 is turned to the opposite side to raise the rod 22. As a result, the needle-shaped portion 21 returns from the hole 41 to the original introduction port 16 portion.

Due to the formation of the hole 41, the refrigerant in the refrigerant pipe 1 reaches the communicating portion 35 of the recovery can 34 from the hole 41 through the inlet 16, the refrigerant discharge passage 20, the discharge port 18, and the discharge pipe 17, respectively. Then, open the Musi rubber 37 and enter the flow passage 36. When the open / close valve 40 is opened by rotating the thumbscrew 38, the inside of the recovery can 34 is evacuated in advance. Therefore, the refrigerant in the condenser 43 immediately enters the recovery can 34 due to the pressure of the refrigerant and the vacuum in the can. And the refrigerant is collected in the collection can. When the collection is completed, turn the thumbscrew 38 in the opposite direction to close the on-off valve 40, remove the discharge pipe 17 from the communication part 35, and loosen the bolt 2 to lower the lower holder 10 and the upper holder 3. Is separated and removed from the refrigerant pipe 1, and the refrigerant recovery operation is completed.

In order to further improve the refrigerant recovery rate, the recovery can is cooled to reduce the refrigerant gas pressure on the recovery side as much as possible, or the condenser is heated by a hair dryer or the like, and the refrigerant on the feed side is cooled. Means such as increasing the gas pressure or using them in combination may be adopted.

At the time of the above-mentioned refrigerant recovery work, it is desirable to set the recovery canister at a position lower than the refrigerator to facilitate the recovery of the liquid refrigerant and prevent the reverse flow of the recovered refrigerant. In addition, a container of about 1 liter is enough for the recovery can in consideration of the refrigerant capacity of a small refrigerator, and the handleability is improved. Further, the amount of refrigerant recovered by the recovery operation is about 80% in the refrigerant circuit, which is about the same as the performance of the current refrigerant recovery machine. Also, the refrigerant recovered in the recovery can can be discarded by replacing it with a substance that does not cause pollution by chemical reaction, or by removing the oil content mixed in the refrigerant and reusing it. .

[0024]

[Effect of device]

 Since the present invention is configured and operates as described above, it is possible to easily collect the refrigerant even for equipment that does not have a service port in the refrigerant pipe, and due to the small and inexpensive equipment, a large amount of waste is discarded. It is possible to carry this refrigerant recovery device to the point where there is another refrigerant device and recover it. In addition, compared to the conventional proposal that inserts a needle-shaped pipe into the refrigerant pipe, it only needs to insert a thin pin, so the equipment for inserting the device is small and wear is low. Therefore, it can be used for a long period of time, and the equipment cost is also low in this respect.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a perspective view of an embodiment of the present invention.

FIG. 3A is a perspective view of a packing used in the present invention,
(B) is the assembled state of the packing used in the present invention.

FIG. 4 is an explanatory diagram of a refrigerant circuit of a refrigerator in which a refrigerant to which the present invention is applied is recovered.

[Explanation of symbols]

 1 Refrigerant Pipe 2 Holder 3 Upper Holder 5 First Flange 6 Second Flange 7 Hanging Part 8 Second Flange 10 Lower Holder 12 First Flange 13 Through Hole 15 Connector 16 Inlet 17 Discharge Pipe 18 Discharge Port 19 Sealant 20 Refrigerant Discharge path 21 Pin 22 Rod 23 Thread part 24 Thumbscrew 28 Packing accommodating part 29 Packing accommodating part 32 Packing 33 Cylindrical packing 34 Collecting can 35 Communication part 37 Musi rubber 38 Thumbscrew 40 Open / close valve 41 Refrigerator 42 Compressor 43 Condenser 44 Expansion Valve 46 evaporator

Claims (1)

[Scope of utility model registration request] 1. A holder provided with a through hole in a side wall and fixed to a refrigerant pipe, and a refrigerant discharge path having an introduction port communicating with the through hole of the holder and a discharge port communicating with a discharge pipe, the holder comprising: A connector that is fixed, a pin that can be inserted into the refrigerant pipe from the inlet of the connector, a pin pressing means that inserts the pin into the refrigerant pipe, and an on-off valve in the communication part that communicates with the discharge pipe A refrigerant recovery device comprising a can.