JP3419631B2 - Refrigerant recovery plant equipment for heat exchange equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant device for recovering a refrigerant from a heat exchange device, and relates to a separate type in which an indoor unit and an outdoor unit are separated or an integrated air conditioner (for a building, It can be used for recovering the refrigerant from heat exchange devices such as trains and automobiles), freezing devices for foods such as seafood and vegetables, refrigerating devices, and vending machines.

[0002]

BACKGROUND ART Refrigerant piping through which a refrigerant is repeatedly gasified and liquefied is provided inside a heat exchange device such as an air conditioner or a refrigerating device. When the heat exchange device is abandoned due to aging or the like, if the refrigerant may cause environmental problems, it is desirable to collect the refrigerant from the refrigerant pipe and not release it to the atmosphere.

A conventional device for recovering the refrigerant from the heat exchange device has a member attached to the refrigerant pipe of the heat exchange device in an attachment manner, and a cylinder or the like is provided at the end of the refrigerant recovery circuit extending from the member. The storage container is connected, and the refrigerant in the refrigerant pipe taken out from the member attached to the refrigerant pipe is stored in the storage tank via the refrigerant recovery circuit.

[0004]

This conventional refrigerant recovery device is a small and simple device composed of a refrigerant recovery circuit, a storage tank, etc., and is designed to recover a refrigerant while exchanging heat exchangers one by one. It has become. For this reason, it is difficult to improve the work efficiency for recovering the refrigerant from the heat exchange device, and it has been impossible to process a large number of heat exchange devices in a short time.

At present, there is an increasing interest in refrigerants in heat exchange devices, and in order to effectively solve environmental problems, it is possible to carry out the work of recovering the refrigerants from a plurality (preferably a large number) of heat exchange devices at the same time. It is desirable to be able to improve efficiency.

An object of the present invention is to provide a refrigerant recovery plant device for a heat exchange device, which can perform the work of recovering the refrigerant from a plurality of heat exchange devices at the same time and can achieve the efficiency of the work.

[0007]

A refrigerant recovery plant device for a heat exchange device according to the present invention is a refrigerant extraction member connected to a refrigerant pipe for refrigerant circulation of a heat exchange device to take out a refrigerant from the refrigerant pipe, A storage tank for storing the refrigerant taken out from the refrigerant take-out member, and a plurality of the refrigerant take-out members for taking out the refrigerant from the refrigerant pipes of the plurality of heat exchange devices are provided in the storage tank. In addition,
The refrigerant is supplied from the storage tank to store the refrigerant.
A storage tank for
Connect multiple cylinders for storage of the refrigerant used
Is provided with a plurality of cylinder connecting members for .

According to the present invention, it is possible to perform the work of recovering the refrigerant from the plurality of heat exchanging devices at the same time by using the plurality of members for taking out the refrigerant, so that the work for recovering the refrigerant can be efficiently performed.

In order to provide a plurality of refrigerant take-out members in the storage tank, the refrigerant take-out members may be directly attached to the tank, but the refrigerant taken out by connecting the plurality of refrigerant take-out members to the refrigerant pipes of a plurality of heat exchange devices. Simplification of collection work,
In order to improve the handleability of the heat exchange device, at least one refrigerant recovery pipe through which the refrigerant can flow is extended from the storage tank, and a plurality of refrigerant extraction members are provided in this refrigerant recovery pipe. It is preferable. If a plurality of refrigerant recovery pipes are provided and a plurality of refrigerant extraction members are provided in each refrigerant recovery pipe, the refrigerant recovery work from a large number of heat exchange devices can be performed at the same time, and further work efficiency can be achieved.

It is preferable that a refrigerant delivery device for sucking the refrigerant from the heat exchange device side and delivering it to the storage tank side under pressure is provided between the refrigerant take-out member and the storage tank. According to this, the refrigerant gradually enters the storage tank from the plurality of heat exchange devices, and even after the pressure in the storage tank becomes larger than the refrigerant pressure in the refrigerant pipes of the heat exchange device, the refrigerant delivery device pressurizes and delivers. By the action, the refrigerant can be continuously sent to the storage tank, and a large amount of the refrigerant can be stored in the tank.

The refrigerant delivery device may be of any type such as a reciprocating type, a scroll type, a screw type or the like as long as it can suck the refrigerant from the heat exchange device side and pressurize it to the storage tank side to deliver it.

When the refrigerant recovery pipe is extended from the storage tank, it is preferable that the refrigerant delivery device is arranged at the connecting portion between the storage tank and the refrigerant recovery pipe. By doing so, even if the refrigerant recovery pipe is provided with a plurality of refrigerant extraction members, the refrigerant delivery device is common to these refrigerant extraction members, and the number of parts can be reduced and the structure can be simplified accordingly.

The device according to the present invention is preferably provided with a cooling device for cooling the storage tank. If the storage tank cooling device is provided in this manner, even if the refrigerant entering the storage tank is a gas, it can be liquefied and stored, and even if this refrigerant gas is compressed by the refrigerant delivery device and becomes high temperature, the refrigerant liquid Can be stored.

The refrigerant device may be of any type, such as a water-cooled type, an air-cooled type, or a mixed type of these.

Here, the provision of a cooling device for cooling the storage tank in the apparatus according to the present invention means that, for example, a coolant flow pipe is folded back and forth a plurality of times in a U-shape at the coolant inlet portion of the storage tank in which the coolant enters. It also includes providing a finned condenser formed as described above and providing a cooling device for cooling only the condenser or both the condenser and the storage tank.

The refrigerant recovered from the heat exchange device and stored in the storage tank is reused if it is of a reusable type, and decomposed if it is of a type that cannot be reused due to environmental problems or the like. It is desirable to dispose of Therefore, the storage tank is provided with a refrigerant outlet.

Refrigerant recovery of the heat exchange device according to the present invention
In the plant equipment, the storage tank is connected to the storage tank.
The refrigerant supplied from the storage tank is stored in this storage tank.
Refrigerant that is stored and reused in the storage tank
Multiple cylinder connections to connect multiple cylinders for storage of
Material is provided.

According to this, a plurality of cylinder connecting members are provided.
Therefore, the refrigerant can be simultaneously supplied from the storage tank to the plurality of cylinders, and not only the refrigerant recovery operation from the heat exchange device but also the refrigerant supply operation to the cylinder can be efficiently performed.

In order to provide a plurality of cylinder connecting members in the storage tank, it is desirable to extend at least one refrigerant distribution pipe from which the refrigerant can flow and to provide a plurality of cylinder connecting members in this refrigerant distribution pipe. According to this, it is possible to facilitate the work of supplying the refrigerant to the cylinder, improve the handleability of the cylinder, and the like.

In the above, since there are various kinds of refrigerants used in the heat exchange apparatus, the refrigerant recovery plant apparatus according to the present invention is constructed, installed, and used while being distinguished for each kind of these refrigerants. It

The heat exchanging device capable of recovering the refrigerant by the device according to the present invention is an air conditioner, a freezing device for food such as seafood, vegetables and meat, a refrigerating device, an automatic vending device for juice and the like. The machine may be of various types for buildings, trains, automobiles, etc., and may be a separate type (including a multi-type) in which the indoor unit and the outdoor unit are separated, or may be an integrated type.

At the place where the device according to the present invention is installed, heat exchange devices that are discarded due to aging and the like are collected, so that the parts and materials of the heat exchange devices such as the air conditioner collected are collected. It is also possible to collect reusable materials and reuse them as they are or by recasting.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a storage tank 1 for storing the refrigerant recovered from the heat exchange device, and a plurality of refrigerant recovery pipes 2 radially extend from the storage tank 1 installed as plant equipment. . Each of the refrigerant recovery pipes 2 is provided with a plurality of refrigerant extraction members 3 arranged side by side in the pipe length direction.
Includes an on-off valve 4 fixed to the refrigerant recovery pipe 2, a flexible refrigerant recovery pipe 5 extending downward from the on-off valve 4, and a connection end 6 attached to the tip of the refrigerant recovery pipe. The connection end 6 is connected to the refrigerant pipe for circulating the refrigerant in the heat exchange device 7 such as an air conditioner, and the refrigerant is taken out from the refrigerant pipe.

If the connection end 6 is provided with, for example, a 3-port valve for supplying the refrigerant to the refrigerant pipe of the heat exchange device 7,
The refrigerant may be connected to the refrigerant supply port of the three-port valve to take out the refrigerant, or may be attached to the refrigerant pipe in an attachment manner, and the needle member may be pierced into the refrigerant pipe from a portion that is closely sealed to the refrigerant pipe. It is also possible that the refrigerant is taken in and taken out. Since various heat exchange devices 7 are carried into the refrigerant recovery place where the storage tank 1 is installed, it is desirable that the connection end portion 6 be replaceable and connectable to the refrigerant pipes of the various heat exchange devices 7.

Heat exchange device 7 taken out from the connection end 6
Even if the refrigerant is a refrigerant liquid or one containing a refrigerant liquid, when it reaches the refrigerant recovery pipe 2 through the refrigerant recovery pipe 5 and the opening / closing valve 4, the internal capacity of the refrigerant recovery pipe 2 is large,
The refrigerant liquid is adiabatically expanded to become a refrigerant gas.

At the connecting portion between the storage tank 1 and the refrigerant recovery pipe 2, a refrigerant processing unit 8 is provided for each refrigerant recovery pipe 2. FIG. 2 shows the refrigerant processing unit 8. The refrigerant processing unit 8 is configured by arranging a refrigerant delivery device 9, a dust removal filter 10, and a moisture removal filter 11 in the refrigerant flow direction. The refrigerant delivery device 9 is a reciprocating type equipped with a reciprocating piston 12, and the space above the piston 12 sucks the refrigerant by the operation of a suction valve 13 and a discharge valve 14,
It is a cylinder chamber 15 that is discharged. Piston 12
By the reciprocating movement of the refrigerant gas, the refrigerant gas is sucked from the heat exchange device 7 side and is pressurized and sent to the storage tank 1 side.

The dust removing filter 10 has a cylindrical filter element 16 through which the refrigerant gas passes from the inside to the outside, and the filter element 16 can be replaced by removing the element receiving member 18 from the main body 17. There is. The filter element, which is a fine mesh member made of rust-free steel or the like, removes dust such as iron powder in the refrigerant gas.

The moisture removing filter 11 is a filter element 21 in which a tubular filter element 21 is exchangeably housed inside a main body 20 which is opened and closed by attaching and detaching a lid member 19, and which is made of activated alumina or the like. By passing the refrigerant gas from the inside of the element 21 to the outside, the moisture in the refrigerant gas is removed.

As shown in FIG. 1, a cooling device 22 for cooling the storage tank 1 is provided near the storage tank 1. This cooling device 22 is one in which a water flow pipe 24 is spirally incorporated inside a peripheral side wall 23 provided upright around the storage tank 1, and the water flowing through the water flow pipe 24 allows the storage tank 1 Is cooled.

The storage tank 1 is provided with a pressure detection circuit 27 having a pressure gauge 25 and a safety valve 26, a vacuum circuit 29 connected to a vacuum pump 28, and a water drain circuit 31 having a water drain pump 30. The float 32 with a water suction port in the storage tank 1 is connected to the water drain circuit 31 via a flexible drain pipe 33.

Further, in the storage tank 1, upper and lower end portions are connected to the inside of the storage tank 1, and a transparent liquid level gauge 34 for confirming the liquid level of the refrigerant liquid in the storage tank 1; And a refrigerant withdrawal port 35 for withdrawing the refrigerant from the storage tank 1.

In order to collect the refrigerant from the heat exchanging device 7 and store it in the storage tank 1, first, the storage tank 1 is made to have a negative pressure by driving the vacuum pump 28, and the connection ends of the plurality of coolant extraction members 3 are connected. If the refrigerant take-out member 3 that is not used is connected to the refrigerant pipes of the plurality of heat exchange devices 7 by closing the open / close valve 4 of the refrigerant take-out member 3,
Open the other on-off valve 4. Then, the refrigerant delivery device 9 of the refrigerant processing unit 8 is driven.

As a result, the refrigerant is sucked from each heat exchange device 7 side, the refrigerant reaches the refrigerant recovery pipe 2 through the refrigerant take-out member 3, and when the refrigerant is or contains the refrigerant liquid, this refrigerant liquid Adiabatically expanded in the refrigerant recovery pipe 2 to become refrigerant gas. After that, the refrigerant gas reaches the storage tank 1 through the refrigerant delivery device 9, the dust removal filter 10, and the moisture removal filter 11, and the dust removal filter 10 removes dust such as iron powder in the refrigerant gas. The water in the refrigerant gas is removed by.

Since the refrigerant is a gas when passing through the moisture removal filter 11 as described above, the heat exchange device 7 can be used regardless of whether the specific gravity of the refrigerant liquid is larger or smaller than that of water.
It is possible to remove the water content in the refrigerant recovered from the.

Refrigerant gas gradually accumulates in the storage tank 1, and when a new heat exchange device 7 is exchange-connected to the connection end portion 6 of the refrigerant take-out member 3 while opening and closing the on-off valve 4, a larger amount of heat is stored in the storage tank 1. The refrigerant gas accumulates and the pressure in the tank 1 rises, but even if this pressure becomes greater than the refrigerant pressure in the refrigerant pipe of the heat exchange device 7, the heat exchange device is surely heated by the pressurized delivery action of the refrigerant delivery device. The refrigerant is collected from 7 and sent to the storage tank 1. Even if the pressure in the storage tank 1 increases, the tank 1 is cooled by the cooling device 22, so that the temperatures of the tank 1 and the refrigerant are suppressed to a certain value or less. Refrigerant liquid is accumulated due to the liquefaction of.

The liquid level of this refrigerant liquid can be confirmed by the liquid level gauge 34. If the pressure in the storage tank 1 exceeds a predetermined value, the safety valve 26 operates.

In order to promote the liquefaction of the refrigerant gas in the storage tank 1, the water removal filter 11 in the refrigerant inlet portion of the storage tank 1, that is, the refrigerant processing section 8 is used.
A condenser with fins is provided on the downstream side of the refrigerant flow direction,
This condenser through which the refrigerant gas flows may also be cooled by the cooling device 22.

When the specific gravity of the refrigerant liquid is larger than that of water and water is produced on the refrigerant liquid in the storage tank 1 due to a malfunction of the moisture removing filter 11 or the like, the water is drawn from the float 32 by the operation of the water draining pump 30. Water is sucked in through the mouth, and this water is discharged to the outside of the storage tank 1 via the water drain pipe 33 and the like. When the specific gravity of the refrigerant liquid is smaller than that of water, a water drain valve may be provided at the bottom of the storage tank 1. In this case, the refrigerant drain port 35 is arranged above the water drain valve.

The refrigerant liquid accumulated in the storage tank 1 is used for reuse or for disposal such as decomposition and the like.
Extracted from 5.

According to the present embodiment described above, since the storage tank 1 is provided with the plurality of refrigerant take-out members 3 for taking out the refrigerant from the heat exchanging device 7, a plurality of heat exchanges can be performed by one storage tank 1. The work of recovering the refrigerant from the device 7 can be performed at the same time, and the work of recovering the coolant can be performed in a large scale to improve the work efficiency.

Further, since the refrigerant recovery pipe 2 through which the refrigerant can flow extends from the storage tank 1 and the plurality of refrigerant take-out members 3 are provided in the pipe 2, the refrigerant recovery work from the plurality of heat exchange devices 7 is performed. When performing the above, these heat exchange devices 7 are arranged in the pipe extending direction so that the heat exchange devices 7
Since it is only necessary to perform the work of sequentially connecting the refrigerant take-out members 3 to each other, it is possible to facilitate the work of recovering the refrigerant and improve the handleability of the heat exchange device 7.

Further, since the storage tank 1 is provided with a plurality of refrigerant recovery pipes 2 and each of the refrigerant recovery pipes 2 is provided with a plurality of refrigerant extraction members 3, the refrigerant recovery for a large number of heat exchange devices 7 is performed at the same time. You can work.

Further, the storage tank 1 and the refrigerant recovery pipe 2
A refrigerant delivery device 9 that draws in the refrigerant from the heat exchange device 7 side and sends it to the storage tank 1 side in a pressurized state at the connection part with
Since the refrigerant delivery device 9 is arranged in common, the refrigerant delivery device 9 is common to a plurality of the refrigerant take-out members 3, so that the number of parts of the refrigerant recovery plant device can be reduced and the structure can be simplified.

Further, since the refrigerant recovery plant apparatus according to the present embodiment is provided with the cooling device 22 for cooling the storage tank 1, the refrigerant gas pressurized by the refrigerant delivery device 9 to become high temperature and high pressure is stored in the storage tank. Even when entering 1, the refrigerant gas can be stored as a refrigerant liquid, so that a large amount of refrigerant can be accumulated in the tank 1 and the refrigerant can be handled thereafter (reuse of the refrigerant and disposal by decomposition, etc.). ) Can be facilitated.

FIG. 3 shows an embodiment in which, when the refrigerant can be reused, the work for the reuse can be efficiently performed. For convenience of understanding, the same members as the members in the above embodiment are designated by the same reference numerals.

In the storage tank 1 of this embodiment,
A connection pipe 41 for connecting the storage tank 40 to the storage tank 1 is provided in place of the refrigerant extraction port 35, and the connection pipe 41 has an opening / closing valve 42, a dust removal filter 43,
A delivery pump 44 is provided, and by opening the on-off valve 42 and driving the delivery pump 44, the refrigerant is supplied from the storage tank 1 to the storage tank 40. When the refrigerant is supplied to the storage tank 1, the air valve 46 of the air circuit 45 operates, whereby the air is discharged from the inside of the storage tank 40 and the refrigerant flows into the tank 40. The amount of the refrigerant liquid stored in the storage tank 40 is confirmed by the vertically long liquid level confirmation 47 formed in the storage tank 1.

A plurality of refrigerant distribution pipes 48 extend radially from the storage tank 40, and a plurality of cylinder connecting members 49 are provided on each refrigerant distribution pipe 48. The cylinder connecting member 49 includes an opening / closing valve 50 attached to the refrigerant distribution pipe 48, a flexible refrigerant distribution pipe 51 extending downward from the opening / closing valve 50, and a connection end portion provided at the tip of the refrigerant distribution pipe 51. 52, and the connection end portion 52 is connected to a cylinder 53 for refrigerant reuse. A cylinder 53 to which the refrigerant is supplied from the storage tank 40
Is used to supply the refrigerant to the refrigerant pipe of this heat exchange device by being transported to the installation location of the heat exchange device such as a new air conditioner.

Before the refrigerant is supplied from the storage tank 1 to the cylinder 53, the opening / closing valves 50 of all the cylinder connecting members 49 are closed, and when supplying the refrigerant to the cylinder 53, the connecting end of the cylinder connecting member 49 is closed. 52 is connected to the cylinder 53,
On-off valve 50 of cylinder connecting member 49 connected to cylinder 53
Open only At the same time, the air valve 46 of the air circuit 45
By introducing air from the storage tank 40 into the storage tank 40, the refrigerant flows from the storage tank 40 into the cylinder 53. The cylinder 53 is placed on the weight scale 54, and when a predetermined weight of refrigerant enters the cylinder 53, the on / off valve 50 is detected by the detection signal from the weight scale 54.
Is closed.

According to this embodiment, since the storage tank 40 is provided with the plurality of cylinder connecting members 49, the refrigerant supply operation to the plurality of cylinders 53 can be performed at the same time, and the refrigerant recovery operation to the storage tank 1 can be performed. , This work can be done efficiently.

Further, since the refrigerant distribution pipe 48 extends from the storage tank 40 and the plurality of cylinder connecting members 53 are provided on the refrigerant distribution pipe 48, the plurality of cylinders 53 are provided.
When supplying the refrigerant to the cylinders, these cylinders 53 are arranged in the pipe extending direction, and the cylinder connecting members 4 are attached to the respective cylinders 53.
By performing the work of sequentially connecting the nine, it is possible to facilitate the work of supplying the refrigerant and improve the handleability of the cylinder 53.

[0051]

According to the present invention, the work of recovering the refrigerant from a plurality of heat exchange devices can be performed at the same time, and the efficiency of this work can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing a refrigerant recovery plant device according to an embodiment of the present invention, and is a diagram in which a cooling device portion is shown as a cross section.

2 is a diagram specifically showing a refrigerant processing unit shown in FIG. 1. FIG.

FIG. 3 is a diagram showing an embodiment of a refrigerant recovery plant apparatus including a storage tank for storing the refrigerant supplied to the cylinder.

[Explanation of symbols]

1 storage tank 2 Refrigerant recovery pipe 3 Refrigerant removal member 7 heat exchanger 8 Refrigerant processing unit 9 Refrigerant delivery device 22 Cooling device 40 storage tanks 48 Refrigerant distribution pipe 49 Cylinder connection member 53 cylinder

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F25B 45/00

Claims (5)

(57) [Claims] 1. A refrigerant take-out member which is connected to a refrigerant pipe for circulating a refrigerant of a heat exchange device and takes out a refrigerant from the refrigerant pipe; and a storage tank which stores the refrigerant taken out from the refrigerant take-out member. A plurality of the refrigerant take-out members for taking out the refrigerant from the refrigerant pipes of the plurality of heat exchange devices are provided in the storage tank, and the storage tank is provided with the storage tank.
A storage tank for storing the refrigerant supplied with the refrigerant.
Is connected to this storage tank before it is reused.
Multiple refrigerants for connecting multiple cylinders for storing refrigerant
A refrigerant recovery plant device for a heat exchange device, which is provided with a cylinder connecting member . 2. The refrigerant recovery plant apparatus for a heat exchange device according to claim 1, wherein at least one refrigerant recovery pipe through which the refrigerant can flow extends from the storage tank,
A refrigerant recovery plant device of a heat exchange device, wherein a plurality of the refrigerant extraction members are provided in the refrigerant recovery pipe. 3. The refrigerant recovery plant apparatus for a heat exchange device according to claim 2, wherein the refrigerant is sucked from the heat exchange device side to a connection portion between the storage tank and the refrigerant recovery pipe, and the storage tank. A refrigerant recovery plant device for a heat exchange device, characterized in that a refrigerant delivery device for delivering in a pressurized state is provided on the side. 4. The refrigerant recovery plant apparatus for a heat exchange device according to claim 1, further comprising a cooling device for cooling the storage tank. Recovery plant equipment. 5. The refrigerant recovery plant apparatus for a heat exchange device according to claim 1 , wherein at least one refrigerant distribution pipe through which the refrigerant can flow extends from the storage tank,
A refrigerant recovery plant device for a heat exchange device, wherein a plurality of the cylinder connecting members are provided in the refrigerant distribution pipe.