JP3345577B2 - Refrigerant recovery method and apparatus and tools therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant recovery method and an apparatus and a tool therefor, and more particularly, to a simple refrigerant recovery method and apparatus for recovering a refrigerant by using a compressor of a refrigeration circuit to be recovered such as an air conditioner for an automobile. About.

[0002]

2. Description of the Related Art Conventionally, there has been a fear that the incidence of skin cancer will increase due to an increase in the amount of ultraviolet rays due to a decrease in the polar ozone layer.
She is shouting through institutions such as HO.

[0003] One of the causes is an increase in the air concentration of Freon gas, so that the emission of Freon gas into the air has been severely restricted.

[0004] Therefore, it is indispensable for environmental measures to recover CFCs from automobile air conditioners, home electric refrigerators, home air conditioners, frozen showcases, etc., which have a relatively short life.

[0005] Therefore, various types of refrigerant recovery devices using an electric motor or an auxiliary engine as a drive source are commercially available and put into practical use.

[0006] However, these devices are generally expensive for their recovery capacity, are not at a level that can be easily purchased and used by automobile dismantling companies and home appliance dismantling companies, and are not widely used. .

[0007] Therefore, even if it is found to be unfavorable in terms of environmental measures, there has been a problem that a considerable amount of Freon gas is released into the air as a result.

As a countermeasure against these, for example, Japanese Patent Laid-Open No. 6-2
Although a method and an apparatus for recovering CFCs such as 995 have been proposed, they all use a compressor driven by an engine of a recovery vehicle,
Since the compressor of the recovered vehicle is not driven, the residual fuel in the recovered vehicle cannot be consumed, and the distance between the refrigeration circuit of the recovered vehicle and the compressor of the recovered vehicle is inevitably increased. There was a problem that the recovery rate could not be increased. The same applies to an electric refrigerator, an air conditioner, a frozen show case and the like.

In the conventional example, when the compressor of the to-be-recovered vehicle is used, when the temperature is low (for example, -10 ° C.), the condenser of the to-be-recovered vehicle refrigeration circuit and the fan of the indoor evaporator are not driven. In addition, since the refrigerant is not heated, the receiver tank freezes and becomes clogged, and the refrigerant does not move and cannot be recovered even if the vehicle to be recovered is driven by a compressor or pulled by the negative pressure of the recovery vehicle compressor.

Accordingly, the present inventors have conducted intensive studies and as a result, temporarily driven a self-compressor included in an air conditioner or a refrigeration circuit of a device to be recovered, such as a scrap car or a waste refrigerator, to thereby provide a low-cost, high-efficiency refrigerant. The present inventors have found that a recovery method can be provided and arrived at the present invention.

[0011]

OBJECTS OF THE INVENTION It is an object of the present invention to provide a low cost and high efficiency refrigerant recovery method and apparatus.

It is another object of the present invention to provide a method and an apparatus for recovering refrigerant using a refrigeration circuit of a device to be recovered, which is a scrapped vehicle or waste.

Still another object of the present invention is to provide a method for recovering refrigerant by spontaneously recovering refrigerant by driving only a self-compressor in a refrigerant recovery apparatus.

Still another object of the present invention is to reduce the amount of fuel remaining in a fuel tank by burning it as effectively as possible when the device to be recovered is an automobile, thereby improving safety and environmental pollution resistance after the fact. It is to do.

It is still another object of the present invention to provide a coolant pipe drilling and shielding tool which is extremely effective in implementing the refrigerant recovery method of the present invention, has a high working efficiency and is excellent in safety.

[0016]

The present invention configuration of the invention, in the recovery method for recovering refrigerant by driving the compressor of the recovery refrigeration circuit, pre
Shields between compressor <br/> suppressor pressure outlet and the condenser of the recovery refrigeration circuit having no fit refrigerant recovery way valve, puncture the pipe near the compressor high pressure outlet of the compressor side of the shielding point
The refrigerant recovery method (Claim 1) is characterized in that the refrigerant is recovered in a high yield by connecting the hole- connected recovery pipe to the refrigerant recovery tank via a gravity utilization condenser. The refrigerant recovery method according to claim 1, wherein the refrigerant droplets move downward and collect by gravity and vibration and are collected in a refrigerant recovery tank (claim 2). A refrigerant recovery apparatus using a compressor of a refrigeration circuit to be recovered as a pressurized source, wherein a recovery pipe is connected and the recovery pipe is connected to a refrigerant recovery tank via a gravity condenser. 4. A gravity utilizing condenser comprising a round and / or angular spiral or zigzag shaped tube having a low flow path resistance and a downwardly inclined portion in each part. The refrigerant recovery device according to any one of claims 3 to 4, wherein the on-board refrigerant recovery device (claim 4) and the gravity utilization condenser are a gravity utilization condenser having a tube with a fin and a forced air cooling fan. The refrigerant recovery device (Claim 6) according to any one of claims 3 to 5, wherein the gravity utilization condenser is a water-cooled gravity utilization condenser using a water jacket or a cooling tower. Alternatively, the refrigerant recovery device (claim 7) according to any one of claims 3 to 6, wherein the refrigerant recovery tank is a water-cooled refrigerant recovery tank. The refrigerant recovery apparatus according to any one of claims 3 to 6, wherein the refrigerant recovery port is formed by pressurizing the pipe substantially in the radial direction. At the compressor high pressure outlet of the refrigeration circuit to be recovered, comprising: a piercing portion having a sharp blade-shaped cusp for piercing; and a pressurizing shielding portion for simultaneously shielding the refrigeration circuit behind the piercing portion. A pipe drilling shielding tool (claim 10) according to claim 9 is provided which is powered by a hydraulic cylinder and a pipe drilling shielding tool used (claim 9).

Hereinafter, the present invention will be described in detail with reference to examples.

[0018]

FIG. 1 is a conceptual diagram of an embodiment of the present invention, FIG. 2 is a conceptual diagram of a refrigeration circuit of the present invention, and FIG. 3 is a conceptual diagram of a cross section of the gravity utilizing condenser of the present invention.

In FIGS. 1 to 3, 1 is a refrigerant recovery device,
2 is a compressor of the vehicle to be recovered, 2A is a compressor low-pressure inlet, 2B is a compressor high-pressure outlet, 2C is a low-pressure hose, 2D is a high-pressure hose, 2E and 2F are pressurizing shields,
G Les Shibatanku, 2H is an evaporator, 2I is a blower, 2J capacitor, 2K engine room, the refrigerant recovery hose 3, the air vent with the joint 4, 5 is a valve, 6
Is a penetrating pipe, 6A is a nut joint, 8, 9 are joints, 10
Is a gravity condenser, 10A is a flexible tube, 11 is a support arm, 11A is a coil spring, 11B
Is a support bracket, 12 is a perforation shielding tool, M is a motor,
14 is a pressure gauge, 15 is a safety valve, 16 is an electric fan, 18
Is a refrigerant recovery tank, 19 is a refrigerant discharge valve, 20 is a vibration source,
22 is a heat insulating material, 25 is a water jacket, 25A is a cooling water inlet, 25B is a cooling water outlet, 100 is a recovered liquid refrigerant, and 200 is a refrigeration circuit of a vehicle to be recovered.

Referring again to FIGS. 1 to 3, the compressor of the vehicle to be recovered (or an electric refrigerator, a freezer showcase, an air conditioner for a large building, or the like) may be driven.
Since a small amount of fuel usually remains in the fuel tank of the vehicle to be recovered and at least a small amount of fuel always remains in the fuel pipe, most of the engines of the vehicle to be recovered can be started by supplying a DC 12V to 24V battery power. 5
Spin for 10 minutes or more. It is possible to drive the compressor 2 using this fact with considerable reliability.
In the case of an electric refrigerator, a freezer showcase, an air conditioner for a large building, or the like that uses an electric motor as a drive source, these compressors are driven as long as a power supply of 100 V single-phase AC or 220 V three-phase AC is supplied. Things are possible.

At present, refrigerant gas is present in the air conditioner circuit of the number of vehicles that are scrapped due to replacement of the vehicle, and only nine vehicles can operate the air conditioner circuit if the engine is started with the battery.
5% or more. Of these 95%, 1 to 2% can start the engine but cannot operate the air conditioner due to failure of the electric circuit or the like. Therefore, most vehicles can self-collect. In the case of refrigerators and refrigerators, at least 99% of the refrigeration circuit can be operated at the time of disposal, and self-recovery close to 100% is possible.

Therefore, the compressor high-pressure outlet 2 inside the closed path is previously opened by the perforated shielding tool 12 in the refrigeration circuit of the vehicle to be recovered.
The refrigerant recovery hose 3 connected to the condenser condenser 0 is connected to the gravity utilization condenser 10, and a vertical vibration V is given to the gravity utilization condenser 10 by a vibration source 20 such as an electromagnetic vibrator or a reciprocating vibrator by a rotating machine.

At the same time, the gravity utilizing condenser 10 is air-cooled by an electric fan 16 (which may be a fan driven from a crankshaft of an engine via a V-belt) driven by a motor M.

The gravity utilizing condenser 10 is a kind of a rounded tube having a gravitational gradient, or a spiral tube having a gravitational gradient, a zigzag, or the like. The cross section of the tube has a flow path resistance such as a circle, a square, an ellipse, and an ellipse. It is a small heat exchanger with a large heat radiation effect, and it is possible to increase the heat radiation effect by attaching fins to these tubes, further increasing the rigidity as a whole by connecting the tubes with the plate fins, The vibration V can be applied to the entire capacitor.

In this way, the Freon gas condensed droplets in the condenser tube are effectively collected and accumulated in the lower refrigerant recovery tank 18 by gravity. The refrigerant recovery tank 18 may be covered with a heat insulating material 22 around the outer periphery, or may be provided with a water jacket 25.
Cooling can increase the filling amount even in summer when the temperature is high. When a certain amount of the collected liquid refrigerant 100 accumulates, the lower refrigerant discharge valve 19 is opened and transferred to another portable container.
Note that the refrigerant recovery tank 18 itself may be a portable container. The gravity-using condenser 10 can be a water-cooled type using a water jacket or a cooling tower utilizing water vaporization heat cooling. A method of directly spraying the condenser may be used. [Punching Shielding Tool] Next, a pipe piercing shielding tool will be described.

FIG. 4 is a side view of a pipe perforation shielding tool according to an embodiment of the present invention, and FIG. 5 is a partial cross-sectional view (partial front cross-sectional view) taken along line AA of FIG.

4 and 5, reference numeral 50 denotes a perforation shielding tool;
51 is a plastic upper jaw, 52 is a plastic lower jaw, 53 and 54 are arms, 6 is a perforated penetrating pipe, 57 is a disk with packing, 60 and 70 are coil springs, 61
Is a metal upper jaw, 62 is a metal lower jaw, 64A, 64B
Is the first fulcrum of the upper and lower jaw made of plastic, 66 is the second fulcrum of the upper and lower jaw made of plastic, 67 is the first fulcrum of the upper and lower jaw made of metal, 68
Is a metal fulcrum second fulcrum, 69 is a lever fulcrum, 71 is an upper lever, 72 is a lower lever, 73 is a lock release lever, 7
5 is a stroke adjusting lever, 77 is a stroke adjusting screw, 78 is a screw knob, and 79 is a bug valve (return valve).

FIG. 4 shows a tool of the present invention obtained by modifying a known drilling pliers, and the basic mechanism itself will be briefly described. 1
A pair of steel upper lever 71 and lower lever 72 move via lower jaw 62, and when they are grasped by hand, upper and lower steel jaws 61, 6 are formed.
2 approaches and pressurizes the held high pressure hose 20 (which may be a copper tube) so that the sharp-pierced perforated tube can penetrate and discharge the refrigerant. At this time, the plastic upper jaw is provided with a packing disc 57 having an annular packing fixed around the center of the perforated penetration tube so that the refrigerant does not escape to the outside. The plastic lower jaw is provided with a round groove (not shown) for clearing the tip of the perforated pipe. A worm valve 79 is provided at the outlet of the discharge pipe, and functions as a check valve.

The stroke of the upper and lower jaws can be adjusted by the screw knob 78.

What is important are the pressure shielding portions 2E and 2F shown in FIG. 5, which is a partial cross-sectional front view taken along the line AA of FIG. The arms 53 and 54 are fixed to one side (the left side in FIG. 5) of the metal upper and lower jaws 61 and 62, respectively. The upper and lower levers 71 and 72 are gripped with strong gripping force, so that the high-pressure hose 2D is pierced with a penetrating pipe. At the same time as the holes 6 penetrate and penetrate at 6, they are sandwiched between the shielding portions 2 </ b> E and 2 </ b> F to block the movement of the refrigerant.

Therefore, the tool of the present invention can simultaneously perform the shield perforation of the high-pressure hose (or copper tube or the like), which is extremely efficient. It goes without saying that the shielding portion may be provided on either the left or right of the upper and lower jaws. Also, this requires a strong grip,
If it is difficult to apply pressure to your hand in a small engine room, etc., use hydraulic or pneumatic hydraulic cylinders or electric cylinders, etc.
Needless to say, the tool of the present invention can be moved by using power.

[0032]

Table 1 shows the outside air temperature -1.
It is a table | surface which shows an Example and a comparative example in case of 0 degreeC-30 degreeC. The results shown in Table 1 are described below. FIG. 6 is a graph showing a part thereof.

In the means such as the comparative example in Table 1, when the compressor of the collection vehicle is used, when the temperature is low (about -10 ° C.),
Since the condenser of the to-be-recovered vehicle and the fan of the indoor evaporator are not driven, there is no endothermic effect in the indoor evaporator, the receiver tank freezes and gets clogged, and the compressor of the to-be-recovered vehicle or the collected vehicle is driven and pulled by negative pressure. The refrigerant does not move, making recovery difficult.

That is, since the method of the present invention drives the self-compressor and does not vaporize the gas, the gas can be recovered even at -10 ° C. However, in the conventional example (comparative example), it is vaporized once and liquefied again, so that it is vaporized in the circuit of the vehicle to be recovered. Will be 1
In the time of about 30 minutes, the inside of the circuit freezes and the gas inside the collection pipe does not move toward the collection vehicle no matter how much suction is performed.

In general, at the time of recovery, it is necessary to pressurize the refrigerant once vaporized again by the compressor of the recovery vehicle to liquefy it, but for the above reasons, the refrigeration circuit is blocked by the frozen receiver tank of the vehicle to be recovered. Therefore, it is considered that only the circuit from the frozen receiver tank to the compressor through the indoor evaporator has a negative pressure, and the refrigerant hardly flows. Therefore, at low temperatures, it takes a long time to recover, and the recovery rate decreases as shown in FIG. However, in the embodiment of the present invention, such a problem does not occur, and the efficiency is extremely high. This difference is particularly noticeable at low temperatures.

[0036]

By implementing the present invention, all of the above objects are achieved.

That is, a low-cost and high-efficiency refrigerant recovery method and apparatus can be obtained, and a refrigerant recovery method and apparatus using the refrigeration circuit of the scrapped vehicle and the waste collection apparatus itself can be obtained. It is possible to provide a refrigerant recovery method in which only the compressor is driven to spontaneously recover the refrigerant.

When the device to be recovered is an automobile, the fuel remaining in the fuel tank of the vehicle to be recovered can be burned as effectively as possible to reduce it, thereby improving safety and environmental pollution resistance after the fact. .

Further, it is possible to provide a coolant pipe drilling and shielding tool which is extremely effective in implementing the refrigerant recovery method of the present invention, has a high working efficiency and is excellent in safety.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a refrigeration circuit of the present invention.

FIG. 3 is a conceptual cross-sectional view of the gravity utilizing capacitor of the present invention.

FIG. 4 Side view of a pipe drilling shielding tool according to an embodiment of the present invention
FIG.

FIG. 5 Partial cross-sectional view taken along the line AA of FIG.
Figure).

FIG. 6 4 is a graph showing a relationship between a refrigerant recovery amount and a recovery time.

[Explanation of symbols]

1 refrigerant recovery apparatus 2 refrigerant to be recovered vehicle compressor 2A compressor low pressure inlet 2B compressor high pressure outlet 2C low hose 2D high pressure hose 2E pressure blocking portion 2F pressure blocking portion 2G les Shibatanku 2H evaporator 2I blower 2J capacitor 2K engine room 3 refrigerant recovery Hose 4 Joint with air release 5 Valve 6 Perforated penetrating pipe 6A Nut joint 8, 9 Joint 10 Gravity utilizing capacitor 10A Flexible tube 11 Support arm 11A Coil spring 11B Support bracket 12 Perforation shielding tool M Motor 14 Pressure gauge 15 Safety valve 16 Electric fan 18 Refrigerant recovery tank 19 Refrigerant discharge valve 20 Vibration source 22 Insulation material 25 Water jacket 25A Cooling water inlet 25B Cooling water outlet 100 Recovered liquid refrigerant 200

Claims (10)

(57) [Claims] In a recovery method for recovering refrigerant by driving a compressor of a refrigeration circuit to be recovered, a three-way refrigerant recovery method is used in advance.
Shielding between the compressor high-pressure outlet and the condenser of the refrigeration circuit to be recovered without a valve, and connecting the recovery pipe perforated to the pipe near the compressor high-pressure outlet on the compressor side of the shielding point to the refrigerant recovery tank via the gravity condenser A refrigerant recovery method characterized in that the refrigerant is recovered at a high yield. 2. The refrigerant recovery method according to claim 1, wherein the refrigerant is liquefied by a gravity-using condenser, and the refrigerant droplets are moved downward and collected by gravity and vibration and collected in a refrigerant recovery tank. 3. A refrigeration circuit to be recovered, wherein a recovery pipe is connected near the high pressure outlet of the compressor of the refrigeration circuit to be recovered, which shields the front of the condenser, and the recovery pipe is connected to a refrigerant recovery tank via a gravity condenser. Refrigerant recovery device using a compressor as a pressure source. 4. The refrigerant recovery apparatus according to claim 3, wherein the gravity utilization condenser is a gravity utilization condenser composed of a round and / or square spiral or zigzag-shaped tube having a low flow path resistance and each part inclined downward. 5. The refrigerant recovery apparatus according to claim 3, wherein the gravity utilization condenser is a gravity utilization condenser having a finned tube and a forced air cooling fan. 6. The refrigerant recovery device according to claim 3, wherein the gravity utilization condenser is a water-cooled gravity utilization condenser using a water jacket or a cooling tower. 7. The refrigerant recovery device according to claim 3, wherein the gravity utilization condenser is a gravity utilization condenser with a vibration device for vibrating a part or the whole thereof. 8. The refrigerant recovery device according to claim 3, wherein the refrigerant recovery tank is a water-cooled refrigerant recovery tank. 9. A perforated portion having a sharp blade-shaped open point for perforating a refrigerant recovery port by pressurizing the pipe substantially in a radial direction thereof, and a heat shield circuit for simultaneously shielding the refrigeration circuit behind the perforated portion. And a pressure-shielding part. 10. The tube drilling and shielding tool according to claim 9, which is powered by a hydraulic cylinder.