JPH0593560A - Refrigerant recovery and regeneration device - Google Patents

Abstract

(57) [Summary] [Purpose] A general-purpose refrigerant cylinder can be detachably attached to a storage container that stores the refrigerant that has been revived into pure refrigerant, and the recovery and regeneration work of the refrigerant is performed only when this general-purpose refrigerant cylinder is installed. To prevent overfilling. [Operation] A general-purpose refrigerant cylinder according to the capacity of the refrigerant to be recovered is placed on the platform scale. Then, the upper limit setting value and the lower limit setting value are set by the filling upper limit value setting switch and the filling lower limit value setting switch of the filling control device. When the push button switch is turned on, the operation indicator lamp is turned on, and filling of the general-purpose refrigerant cylinder placed on the platform scale is started. When the pure refrigerant is collected in the general-purpose refrigerant cylinder and the filling amount of the general-purpose refrigerant cylinder reaches the upper limit set value, the refrigerant recovery / regeneration work is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant recovery / regeneration device, and more particularly to a refrigerant recovery / regeneration device capable of preventing a general-purpose refrigerant cylinder from being overfilled with an appropriate amount.

[0002]

2. Description of the Related Art A conventional refrigerant recovery / regeneration device is a device for rejuvenating a contaminated refrigerant recovered from a refrigerant recovery device such as a refrigerator or an air conditioner (for example, a car air conditioner) into a pure refrigerant for storage. 4 has a configuration as shown in FIG.

That is, in the figure, reference numeral 100 denotes a refrigerant recovery device, which is a device for recovering contaminated refrigerant from a refrigerant recovery device such as a car air conditioner. An inlet operation valve 110 is a valve which is connected to a refrigerant recovery device such as a car air conditioner and takes in a gaseous contaminated refrigerant in the refrigerant recovery device. Reference numeral 120 denotes a compressor, which is connected to the inlet operation valve 110 by a pipe 130 and compresses a gaseous polluted refrigerant that flows in through the inlet operation valve 110 into a high pressure and sends it out.

Reference numeral 140 is a condenser, which is connected to the compressor 120 and liquefies the high-pressure refrigerant compressed in the compressor 120. Reference numeral 150 denotes a fan, which dissipates heat generated by the high-pressure refrigerant in the condenser 140. That is, the fan 150 sends a constant amount of air to the surface of the condenser 140.

Reference numeral 160 denotes a receiver, which temporarily stores the refrigerant liquefied in the condenser 140 and continuously sent out, and of the refrigerant sent from the condenser 140, a liquid refrigerant and a partially unliquefied refrigerant are stored. It has the function of sending only the separated and liquid refrigerant to the dryer 170.

A dryer 170 is connected to the receiver 160, and cleans the contaminated liquid refrigerant sequentially sent from the receiver 160 and restores it to the original pure refrigerant. That is, this dryer 170 is the receiver 16
The water and impurities mixed in the liquid refrigerant sent from 0 are removed.

An outlet operation valve 180 is connected to the receiver 190. The outlet operation valve 180 is a valve element that operates the discharge of the refrigerant regenerated into pure refrigerant in the refrigerant recovery device 100. The receiver 190 is a built-in container of the refrigerant recovery device 100, and is a dedicated container for recovering and storing the refrigerant regenerated into pure refrigerant. The float switch 200 is provided inside the receiver 190,
Depending on the amount of the recovered refrigerant, it is configured to move up and down as shown by arrows A and B in FIG. The float switch 200 has an action of operating when the amount of the recovered refrigerant reaches a preset liquid level and stopping the operation of the compressor.

Reference numeral 210 is a check valve for preventing the liquid refrigerant supplied from the dryer 170 to the receiver 190 via the outlet control valve 180 from flowing back from the receiver 190 to the dryer 170.

Reference numeral 220 denotes a refrigerant supply operation valve, which is a receiver 19
0 from the receiver 190 when supplying the refrigerant regenerated to the pure refrigerant stored and stored in the receiver 190 to the refrigerant recovery device such as a refrigerator or an air conditioner (for example, a car air conditioner). It is a valve body that controls the discharge of the refrigerant.

Refrigerant recovery / regeneration device 1 having such a configuration
In 00, the recovered refrigerant is in a gaseous state and the inlet operation valve 110
Is sucked from the compressor 120 by the compressor 120 and discharged to the condenser 140 as a high-pressure and high-temperature gas. It is cooled by the fan 150 and the like by the condenser 140 and liquefied and enters the receiver 160. Further, it passes through the dryer 170 to be regenerated by removing impurities and the like, and is recovered from the outlet operation valve 180 by the receiver 190 incorporated in the refrigerant recovery / regeneration device 100. The float switch 200 prevents the receiver 190 from being overfilled.

[0011]

However, in the conventional refrigerant recovery and regeneration device, since the receiver for recovering and storing the refrigerant revived into the pure refrigerant is a built-in dedicated container, the receiver is built in. When recharging the refrigerant that has been regenerated to the pure refrigerant recovered in the above, to the refrigerant recovery device such as a refrigerator or air conditioner (car air conditioner) from the receiver, to the refrigerator or air conditioner where the refrigerant recovery / regeneration device is charged There is a problem that it has to be transported, which is extremely laborious.

Further, in the conventional refrigerant recovery / regeneration device, since the receiver is of a dedicated container built-in type, the refrigerant contaminated from a large-capacity refrigerator, air conditioner or the like with a fixed storage capacity. In the case of collecting the above, there is a problem that the storage capacity of the built-in receiver is not sufficient and it cannot be coped with unless a plurality of refrigerant collecting and reproducing apparatuses are prepared.

Further, in the conventional refrigerant recovery and regeneration device,
If you replace the receiver, which is a built-in dedicated container that stores the regenerated refrigerant in pure refrigerant, with a general-purpose refrigerant cylinder, the general-purpose refrigerant cylinder cannot be equipped with a float switch, so the filling amount can be measured. Instead, it has the problem of overfilling.

According to the present invention, a general-purpose refrigerant cylinder can be detachably attached to a storage container for accommodating a refrigerant that has been regenerated into a pure refrigerant, and a contaminated refrigerant can be collected only when the general-purpose refrigerant cylinder is installed. An object of the present invention is to provide a refrigerant recovery and regeneration device that can start a regeneration operation and can prevent overfilling.

[0015]

In order to achieve the above object, the refrigerant recovery and regeneration device of the present invention takes in the refrigerant recovered from the refrigerant recovery target device through an inlet operation valve and compresses it with a compressor, In the refrigerant recovery / regeneration device, the refrigerant compressed by the compressor is condensed by a condenser and supplied to a dryer through a receiver, and water and impurities in the refrigerant are removed by the dryer and then recovered from an outlet operation valve. While connecting a general-purpose refrigerant cylinder to the valve, provided with a platform scale for measuring the filling capacity of the universal refrigerant cylinder, when the weighing value of the platform scale reaches the maximum filling amount corresponding to the fillable capacity of the general-purpose refrigerant cylinder The drive of the compressor is stopped.

Further, in order to achieve the above object, the refrigerant recovery and regeneration apparatus of the present invention takes in the refrigerant recovered from the refrigerant recovery target apparatus via the inlet operation valve and compresses it with the compressor,
In the refrigerant recovery / regeneration device, the refrigerant compressed by the compressor is condensed by a condenser and supplied to a dryer through a receiver, and water and impurities in the refrigerant are removed by the dryer and then recovered from an outlet operation valve. A general-purpose refrigerant cylinder is configured to be connectable to the valve, and a platform scale for measuring the filling capacity of the general-purpose refrigerant cylinder is provided, and a filling upper limit value and filling corresponding to the filling capacity of the general-purpose refrigerant cylinder placed on the platform scale are provided. An upper and lower limit setting switch that can freely set a lower limit value, the general-purpose refrigerant cylinder is placed on the platform scale, and the weighing value of the platform scale is between the filling upper limit value and the filling lower limit value. A filling control device having a filling operation switch that operates only when the weighing value of the platform scale exceeds the filling upper limit value and does not operate when the weighing value is below the filling lower limit value is also provided. It is.

A heat exchanger is provided between the dryer and the outlet control valve so that a part of the refrigerant output from the dryer as the refrigerant of the heat exchanger is supplied through the caterpillar tube. Is preferred.

[0018]

Function: A general-purpose refrigerant cylinder according to the capacity of the refrigerant to be recovered is placed on the platform scale. Then, the upper limit setting value and the lower limit setting value are set by the filling upper limit value setting switch and the filling lower limit value setting switch of the filling control device. When the push button switch is turned on, the operation indicator lamp is turned on, and filling of the general-purpose refrigerant cylinder placed on the platform scale is started. When the pure refrigerant is collected in the general-purpose refrigerant cylinder and the filling amount of the general-purpose refrigerant cylinder reaches the upper limit set value, the refrigerant recovery / regeneration work is stopped.

At this time, a part of the liquefied refrigerant regenerated by removing impurities and the like in the dryer is decompressed as a refrigerant of the heat exchanger in the capillary tube and supplied to the heat exchanger, and passes through the heat exchanger. Heat is exchanged with most of the refrigerant sent from the dryer and discharged to the return pipe.

[0020]

EXAMPLES Examples of the present invention will be described below. FIG. 1 shows a first embodiment of the refrigerant recovery and regeneration device according to the present invention.

In the figure, reference numeral 1 denotes a refrigerant recovery / regeneration device for recovering the contaminated refrigerant recovered from a refrigerant recovery device such as a refrigerator or an air conditioner (for example, a car air conditioner) into a pure refrigerant. is there. The refrigerant recovery / reproduction device 1 is placed on a trolley 2. An inlet operation valve 3 has the same structure as the inlet operation valve 110 shown in FIG. Four
Is a compressor and has the same configuration as the compressor 120 shown in FIG. Reference numeral 5 denotes a conduit, which has the same structure as the conduit 130 shown in FIG. Reference numeral 6 denotes a capacitor, which has the same configuration as the capacitor 140 shown in FIG. A fan 7 has the same configuration as the fan 150 shown in FIG. 8 is a receiver, which is the receiver 160 shown in FIG.
It has the same configuration as. A dryer 9 has the same structure as the dryer 170 shown in FIG. An outlet control valve 10 has the same structure as the outlet control valve 180 shown in FIG. A check valve 11 has the same configuration as the check valve 210 shown in FIG.

Reference numeral 12 denotes a general-purpose refrigerant cylinder, which is a container for storing the refrigerant that has been regenerated into the original pure refrigerant by removing water, impurities and the like mixed in the liquid refrigerant contaminated in the dryer 9 and washing it. In this general-purpose refrigerant cylinder 12,
Generally 5K refrigerant cylinder (refrigerant storage capacity 5Kg), 10
There are K refrigerant cylinders (refrigerant storage capacity 10 kg) and 20K refrigerant cylinders (refrigerant storage capacity 20 kg).

Reference numeral 13 is a platform scale on which a general-purpose refrigerant cylinder 12 can be placed. The platform scale 13 can mount any general-purpose refrigerant cylinder, such as a 5K refrigerant cylinder, a 10K refrigerant cylinder, or a 20K refrigerant cylinder, and can measure any of these general-purpose refrigerant cylinders. The platform scale 13 is placed on the cart 2.

Reference numeral 14 is a filling control device for controlling the capacity of the refrigerant filled and stored in the general-purpose refrigerant cylinder 12 placed on the platform scale 13. Reference numeral 15 is a display for displaying the upper and lower limit set values of the filling amount of the general-purpose refrigerant cylinder 12 (weight of the general-purpose refrigerant cylinder 12) and the current general-purpose refrigerant cylinder 1
The filling amount of 2 is displayed. As a specific display method of the display 15, there is a method of digitally displaying the upper limit setting value and the lower limit setting value of the filling amount of the general-purpose refrigerant cylinder 12 by numbers. The display 15 displays “Hi” when the filling amount of the general-purpose refrigerant cylinder 12 exceeds the upper-limit set value, and is below the lower-limit set value because the general-purpose refrigerant cylinder 12 is not placed on the platform scale 13. If it is "L
It is also possible to display "o" and display "GO" when it is between the upper limit setting value and the lower limit setting value.

Reference numeral 16 is a filling upper limit value setting switch, which is an input switch for setting the upper limit setting value of the filling amount of the general-purpose refrigerant cylinder 12. This filling upper limit value setting switch 16
Can be set by a digital value, and the set value at this time is displayed on the display 15. The upper limit set value of the filling amount of the general-purpose refrigerant cylinder 12 is set to be the upper limit set value = maximum filling amount × 0.9 or less depending on the capacity of the general-purpose cylinder.

Reference numeral 17 is a filling lower limit value setting switch, which is an input switch for setting the lower limit setting value of the filling amount of the general-purpose refrigerant cylinder 12. This filling lower limit value setting switch 16
Can be set by a digital value, and the set value at this time is displayed on the display 15. The lower limit set value of the filling amount of the general-purpose refrigerant cylinder 12 is set as the lower limit set value = less than the refrigerant cylinder own weight depending on the capacity of the general-purpose cylinder.

Reference numeral 18 denotes an operation display lamp, which indicates that filling has been started and the general-purpose refrigerant cylinder 12 is being filled. Reference numeral 19 denotes an abnormality display lamp, which is displayed when an abnormally high voltage is applied to the system or when an abnormal current flows in the circuit of the filling control device 14. Reference numeral 20 denotes an end display lamp, which is lit when all the contaminated refrigerant in the refrigerant recovery device is completely recovered and when the filling amount of the general-purpose refrigerant cylinder 12 reaches the upper limit set value.

Reference numeral 21 denotes an operation switch, which is a general-purpose refrigerant cylinder 1
This is a switch that is turned on when the filling of 2 is started. 22
Is a stop switch.

Reference numerals 23 and 24 are connection lines, and the connection line 2
3 is for taking the measured value of the platform scale 13 into the filling control device 14, and the connection line 24 is for the filling control device 14
Is connected to the refrigerant recovery / regeneration device 1 and is for transmitting a command from the filling control device 14 to the refrigerant recovery / regeneration device 1.

The detailed circuit of the filling control device 14 has a structure as shown in FIG. That is, the outlet 30 connected to the AC100V commercial power source has the relay contact 3
The motor 32 of the compressor 4 is connected via 1A.
An overcurrent relay 33 is inserted between the motor 32 and the relay contact 31A.

In addition, one end of the operation switch 21 and one end of a normally open relay contact 31B are connected to one end of the outlet 30. The operation switch 21 is composed of an automatic reset type push button, and is turned on only when pressed, and is a switch for starting the filling control device 14. The relay contact 31B is the operation switch 21.
It is a self-exciting switch that is connected in parallel with and is maintained in the ON state continuously after switching by the operation switch 21.

One end of the stop switch 22 is connected to the other end of the operation switch 21 and the other end of the relay contact 31B. The stop switch 22 becomes a normally closed contact after the power is turned on. The high pressure switch 34 is connected to the other end of the stop switch 22. This high pressure switch 34
Is for stopping the driving of the entire system in order to protect the device when an abnormally high voltage is applied to the system, which is normally connected to the contact a and an abnormally high voltage is applied to the system. In this case, the contact point b is switched.

An overcurrent relay 33 is connected to the contact a. The overcurrent relay 33 is an overcurrent relay that is inserted between the motor 32 and the relay contact 31A, and is normally connected to the contact c. It operates when an overcurrent flows and is connected to the contact d. Work to switch.

The contact c is a normally closed relay contact 35.
One end of A is connected, and the relay coil 31C, the operation display lamp 18, and the timer relay coil 36B are connected to the other end of the relay contact 35A. The other end of each of the relay coil 31C, the operation display lamp 18, and the timer relay coil 36B is connected to the other end of the outlet 30. An abnormality display lamp 19 is connected to the contact points b and d, and the other end of the abnormality display lamp 19 is connected to the other end of the outlet 30.

A low pressure switch 37 and one end of a normally closed relay contact 38A are connected to one end of the outlet 30. The low-pressure pressure switch 37 normally has its contacts opened, and when the filling pressure for filling the general-purpose refrigerant cylinder 12 is lower than a certain pressure, that is, the general-purpose refrigerant cylinder 1
It acts so as to close (turn on) when the filling pressure into 2 becomes higher for some reason. Relay contact 38A
Is a contact switch that opens when the general-purpose refrigerant cylinder 12 is placed on the platform scale 13 and the filling amount of the general-purpose refrigerant cylinder 12 does not reach the upper limit set value set by the filling upper limit value setting switch 16. This low pressure switch 37
The relay coil 35B and the end display lamp 20 are connected to the other end of the normally closed relay contact 38A.

An AC / DC converter 39 is connected to the outlet 30. To the (+) terminal of the AC / DC converter 39, one end of the timer relay contact switch 36A and one end of the filling operation switch 41 are connected.

The timer relay contact switch 36A is a normally closed switch which is turned on after a predetermined time has elapsed when a built-in timer (not shown) is activated when the timer relay coil 36B is excited. That is, this timer relay contact switch 36A
Is for giving a time difference so that the timer relay coil 36B is activated immediately when it is excited and is not turned on.

The charging operation switch 41 is a switch that maintains the ON state when the general-purpose refrigerant cylinder 12 placed on the platform scale 13 can be charged with the refrigerant. That is, in the filling operation switch 41, the general-purpose refrigerant cylinder 12 is placed on the platform scale 13, and moreover, the general-purpose refrigerant cylinder 1
The ON state is maintained when the content of 2 has not reached the upper limit set value set by the filling upper limit value setting switch 16. Therefore, the filling operation switch 41 is turned on only when the measured value of the general-purpose refrigerant cylinder 12 placed on the platform 13 by the platform 13 indicates between the filling upper limit value and the filling lower limit value corresponding to the fillable capacity. Then
When the measured value by the platform scale 13 exceeds the filling upper limit value (in this case, it indicates that overfilling occurs if it is further filled) and when it is below the filling lower limit value (in this case, it is generalized on the platform scale 13). When the refrigerant cylinder 12 is not placed, it is turned off.

One end of a relay coil 40 is connected to the other end of the timer relay contact switch 36A. The relay coil 40 is for turning on and off an electromagnetic clutch (not shown) for the compressor. That is, the relay coil 40 engages the electromagnetic clutch for connecting the compressor of the compressor 4 to the motor 32 to operate when it is excited, and turns the compressor of the compressor 4 to the motor 32 when the excitation is released. It acts to disengage the electromagnetic clutch in order to release the connection with.

One end of the relay coil 38B is connected to the other end of the charging operation switch 41. The relay coil 38B is excited when the filling operation switch 41 is turned on, and turns off the relay contact 38A. That is, in the relay coil 38B, when the general-purpose refrigerant cylinder 12 is placed on the platform scale 13 and the internal capacity of the general-purpose refrigerant cylinder 12 does not reach the upper limit set value set by the filling upper limit value setting switch 16. It is excited by the ON operation of the filling operation switch 41 which is turned on. When the relay coil 38B is excited, the normally-closed relay contact 38A is opened, and the end display lamp 2 which is lit
0 goes out. In addition, a general-purpose refrigerant cylinder 1 is placed on the platform scale 13.
2 is not placed, or even if the general-purpose refrigerant cylinder 12 is placed on the platform scale 13, it is turned off when the content reaches the upper limit set value set by the filling upper limit value setting switch 16. The excitation is released by turning off the filling operation switch 41. When the excitation of the relay coil 38B is released, the normally closed relay contact 38A is closed,
The end indicator lamp 20, which has been turned off until now, lights up to notify the end of filling.

The other end of the relay coil 38B and the other end of the relay coil 40 are connected to the (-) terminal of the AC / DC converter 39.

Next, the operation of this embodiment will be described.
First, the stop switch 22 is released. Even if the stop switch 22 is released, the general-purpose refrigerant cylinder 1 is placed on the platform scale 13.
In the state where No. 2 is not placed, the charging operation switch 41 is in the OFF state, so the relay coil 38B is not excited. Therefore, the normally-closed relay contact 38A is in a closed state, and the end display lamp 20 remains lit to indicate the filling completion state. At this time, the relay coil 35B is excited, and the normally-closed relay contact 35A is open. Therefore, even if the operation switch 21 is turned on, no current flows through the relay coil 31C and the relay coil 31C is not excited. If the relay coil 31C is not excited, the relay contact 31A is not closed, so that the motor 32 for driving the compressor 4 does not operate and the compressor 4 does not drive.

Now, a 5K refrigerant cylinder (refrigerant storage capacity 5
Kg) 10K refrigerant cylinder (refrigerant storage capacity 10K
g), one of the general-purpose refrigerant cylinders is selected from the 20K refrigerant cylinders (refrigerant storage capacity 20 kg) according to the capacity of the refrigerant to be recovered, and the general-purpose refrigerant cylinder is jointed to the outlet operation valve 10 and placed on the platform scale 13. Place 12. Then, in the filling control device 14, the lower limit setting value (less than the refrigerant cylinder own weight) set by the filling lower limit value setting switch 17, which is the operating condition of the filling operation switch 41, is satisfied. Further, if the filling amount of the general-purpose refrigerant cylinder 12 placed on the platform scale 13 does not reach the upper limit set value (maximum filling amount × 0.9 or less) set by the filling upper limit value setting switch 16, the filling operation switch 41. Turns on and the relay coil 38
B is excited, the normally closed relay contact 38A is opened, the end indicator lamp 20 is turned off, and the relay coil 35
Since B is no longer excited, the relay contact 35A, which has been in the open state, is turned on and is ready for filling. At this time, no abnormally high voltage is applied to the system, and no overcurrent flows in the electric circuit. Therefore, the high pressure switch 34 is connected to the contact a and the overcurrent relay 33 is connected to the contact c. ing.

When the operation switch 21 is turned on,
Electric power is supplied to the relay coil 31C, the operation display lamp 18, and the timer relay coil 36B. Then, the operation display lamp 18 is turned on, and it is displayed that the general-purpose refrigerant cylinder 12 currently placed on the platform scale 13 is being filled. Further, the relay coil 31C is excited, and the relay contact 31B and the relay contact 31A are closed. When the relay contact 31B is turned on, the relay coil 31C, the operation display lamp 18, and the timer relay coil 3 are released even if the operation switch 21 is released and the operation switch 21 is automatically returned to the off state.
The current will be continuously supplied to 6B. When the relay contact 31A is closed, the drive motor 32 of the compressor 4 rotates. Even if the drive motor 32 of the compressor 4 rotates, the compressor of the compressor 4 does not operate immediately. The compressor of the compressor 4 does not operate unless it is connected to the driving motor 32 of the compressor 4. Further, the timer relay coil 36B is excited, the timer built in the timer relay contact switch 36A is activated, and the timer relay contact switch 36A is turned on after a lapse of a predetermined time.

When the timer relay contact switch 36A is turned on, the relay coil 40 is excited and the relay coil 4
By exciting 0, the electromagnetic clutch for closing the compressor of the compressor 4 is closed and the compressor of the compressor 4 is set to the motor 32.
It works by connecting to. This drives the compressor 4,
A contaminated refrigerant is sucked from a refrigerant recovery device such as a refrigerator or an air conditioner (for example, a car air conditioner), compressed, and discharged to the condenser 6 as a high-pressure and high-temperature gas. The refrigerant supplied to the condenser 6 is liquefied by the condenser 6 and enters the receiver 8. It is temporarily stored in the receiver 8 and supplied to the dryer 9. The water, impurities, etc. mixed in the contaminated liquid refrigerant in the dryer 9 are removed and washed to regenerate the original pure refrigerant, and the refrigerant is stored in the general-purpose refrigerant cylinder 12 via the outlet operation valve 10. It

The recovery of pure refrigerant into the general-purpose refrigerant cylinder 12 progresses, and the filling amount of the general-purpose refrigerant cylinder 12 reaches the upper limit set value (maximum filling amount × 0.9 or less) set by the filling upper limit value setting switch 16. Then, the filling operation switch 41 is turned off. When the charging operation switch 41 is turned off, the excitation of the relay coil 38B that has been excited until now is released, the relay contact 38A that has been opened is closed, the end display lamp 20 is turned on, and the relay coil 35B is excited. .. The relay contact 35A is turned off by the excitation of the relay coil 35B, the operation display lamp 18 is turned off, and the excitation of the relay coil 31C and the timer relay coil 36B which have been excited until now are released. When the excitation of the relay coil 31C is released, the relay contact 31B and the relay contact 31A that have been on until now are turned off. When the relay contact 31B turns off, the circuit connected to the relay contact 31B turns off. That is, the relay coil 31C, the operation display lamp 18, the timer relay coil 36
Supply of current to B is stopped. In addition, relay contact 31A
When is turned off, the electric power supplied to the drive motor 32 of the compressor 4 is turned off and the rotation is stopped. Timer relay coil 36B
Is released, the timer relay contact switch 36
A is turned off, the excitation of the relay coil 40 is released, and the electromagnetic clutch connecting the compressor of the compressor 4 to the drive motor 32 of the compressor 4 is released. In this way, when the amount of the upper limit set value (maximum filling amount x 0.9 or less) of the regenerated pure refrigerant is recovered in the general-purpose refrigerant cylinder 12, the recovery operation of the refrigerant regenerated into the pure refrigerant is stopped, Prevents overfilling.

When an abnormally high voltage is applied to the system or an overcurrent flows in the electric circuit, the high-pressure pressure switch 34 and the overcurrent relay 33 are activated, and the connection contact (contact a, The main circuit is cut off by switching the connection from the contact point c) to the contact point b and the contact point d.
9 is lit to indicate that an abnormality has occurred.

Therefore, according to the present embodiment, if only the general-purpose refrigerant cylinder is attached or detached after the refrigerant is collected from the refrigerator or the air conditioner, only the general-purpose refrigerant cylinder can be moved or only the general-purpose refrigerant cylinder can be stored. ..

Further, according to the present embodiment, even when the refrigerant is recovered from a large capacity refrigerator or air conditioner, the cylinder capacity can be selected according to the recovered amount, and one general-purpose refrigerant cylinder can be filled up. For example, by replacing the next empty general-purpose refrigerant cylinder with one refrigerant recovery / regeneration device, any large-capacity refrigerator or air conditioner can be recovered.

FIG. 3 shows a second embodiment of the refrigerant recovery and regeneration device according to the present invention. In the figure, the present embodiment differs from the first embodiment shown in FIG. 1 in that a recovery refrigerant cooling device is provided between the dryer 9 and the outlet operation valve 10.

That is, 25 is a heat exchanger, which is a dryer 9
Is provided between the check valve 11 and the check valve 11. This heat exchanger 2
5 is for cooling the temperature of the refrigerant discharged from the dryer 9 which is slightly higher than the temperature of the refrigerant supplied from the receiver 8 to at least the temperature of the refrigerant supplied from the receiver 8. Is.

26 is a capillary tube, which is a dryer 9
And a heat exchanger 25 are connected to each other in a branched manner, and a part of the refrigerant supplied from the dryer 9 branched in the conduit 27 supplies a temperature to the heat exchanger 25.
The capillary tube 26 is for decompressing a part of the refrigerant supplied from the dryer 9 branched from the pipeline 27, slowing the speed, and slowly supplying the refrigerant as the refrigerant for the heat exchanger 25. That is, the capillary tube 26
Is used so that the refrigerant supplied as the refrigerant of the heat exchanger 25 can be vaporized rapidly and reliably in the heat exchanger 25 to fully utilize the action of the refrigerant.

Further, since this pipe line 27 supplies a part of the refrigerant supplied from the dryer 9 to the capillary tube 26 and most of the refrigerant supplied from the dryer 9 to the heat exchanger 25, a branch circuit is provided. Is composed of. In this way, a part of the refrigerant branched from the pipe 27 and supplied from the dryer 9 is completely vaporized at the moment when it enters the heat exchanger 25 and acts as a refrigerant, so that the refrigerant in the heat exchanger 25 is vaporized. 28 is a return pipe that cools the refrigerant supplied from the dryer 9 passing through the heat exchanger 25 to a predetermined temperature by heat, and connects the heat exchanger 25 and the pipe 5. That is, a part of the refrigerant supplied from the dryer 9 is transferred to the capillary tube 26.
The refrigerant is supplied to the heat exchanger 25 via the, and the refrigerant vaporized in the heat exchanger 25 is returned to the compressor 4.

The heat exchanger 25, the capillary tube 26, the pipe line 27, and the return pipe line 28 constitute a recovery refrigerant cooling device.

With such a configuration, the liquefied refrigerant regenerated by removing impurities and the like in the dryer 9 is sent to the pipe line 27. Most of the refrigerant regenerated in the dryer 9 and delivered to the pipe 27 is delivered to the heat exchanger 25. Then, a part of the refrigerant sent from the dryer 9 to the pipe 27 is decompressed in the capillary tube 26 as the refrigerant of the heat exchanger 25 and supplied to the heat exchanger 25. The refrigerant supplied to the heat exchanger 25 via the capillary tube 26 is immediately vaporized in the heat exchanger 25. This vaporized refrigerant exchanges heat with most of the refrigerant sent from the dryer 9 passing through the heat exchanger 25, and is discharged to the return conduit 28. The refrigerant in the heat exchanger 25 discharged to the return pipe 28 is sucked into the compressor 4 from the inlet operation valve 1 together with the gaseous recovery refrigerant again.

Therefore, according to the present embodiment, a part of the refrigerant discharged from the dryer 9 is branched by the pipe line 27 which is a branch circuit and the heat exchanger 2 through the caterpillar tube 26.
5, a part of the refrigerant that has left the dryer 9 in the portion of the caterpillar tube 26 is decompressed and evaporated (vaporized) in the heat exchanger 25. The refrigerant flowing to the heat exchanger 2
The temperature can be lowered by cooling in 5.

[0057]

Since the present invention is constructed as described above, it has the following effects.

A general-purpose refrigerant cylinder is connected to the outlet operation valve, and a platform scale for measuring the filling capacity of the general-purpose refrigerant cylinder is provided. The measured value of the platform scale reaches the maximum filling amount corresponding to the filling capacity of the general-purpose refrigerant cylinder. Since the drive of the compressor is stopped when it is done, it can be detachably attached using a general-purpose refrigerant cylinder to a storage container that stores the refrigerant revived in pure refrigerant, and the general-purpose refrigerant cylinder is installed. It is possible to start the operation of collecting and regenerating the contaminated refrigerant only when the general-purpose refrigerant cylinder is overfilled.

A general-purpose refrigerant cylinder can be connected to the outlet control valve, and a platform scale for measuring the filling capacity of the general-purpose refrigerant cylinder is provided, and the filling capacity of the general-purpose refrigerant cylinder mounted on the platform scale is supported. Upper and lower limit setting switch that can freely set the filling upper limit value and the filling lower limit value, and a general-purpose refrigerant cylinder is placed on the platform scale, and the weighing value of this platform scale is between the filling upper limit value and the filling lower limit value. Since it is equipped with a filling control device equipped with a filling operation switch that operates only when the weighing value of the platform scale exceeds the filling upper limit value and does not operate when the weighing value of the platform scale falls below the filling lower limit value, a pure refrigerant is revived. A general-purpose refrigerant cylinder can be removably attached to a storage container for storing the refrigerant, and the recovery and operation of contaminated refrigerant can be started only when the general-purpose refrigerant cylinder is installed. Can, and the storage capacity can be set freely, it is possible to prevent overfilling of the universal refrigerant cylinder.

Further, a heat exchanger is provided between the dryer and the outlet operation valve, and a part of the refrigerant output from the dryer as the refrigerant of the heat exchanger is supplied through the caterpillar tube. The temperature of the recovered refrigerant can be lowered by cooling the refrigerant flowing from the dryer to the check valve and the outlet operation valve in the heat exchanger, and a predetermined amount of refrigerant can be stably stored in the general-purpose refrigerant cylinder.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit system diagram showing a first embodiment of a refrigerant recovery and regeneration device according to the present invention.

FIG. 2 is an electric circuit configuration diagram of the filling control device shown in FIG.

FIG. 3 is a refrigerant circuit system diagram showing a second embodiment of the refrigerant recovery and regeneration device according to the present invention.

FIG. 4 is a refrigerant circuit system diagram showing an embodiment of a conventional refrigerant recovery and regeneration device.

[Explanation of symbols]

1 ……………………………………………… Refrigerant recovery and regeneration device 2 ………………………………………… Car 3 ………………………… ……………… Inlet control valve 4 ………………………………………… Compressor 5 ………………………………………… Pipeline 6 …… …………………………………… Condenser 8 ………………………………………… Receiver 9 ………………………………………… Dryer 10 ……………………………………………… Outlet control valve 12 ………………………………………… General purpose refrigerant cylinder 13 ……………………………… …………… Platform scale 14 ………………………………………… Filling control device 15 ………………………………………… Display 16 ………………………… …………………… Filling upper limit value setting switch 17 ………………………………………… Under filling Value setting switch 18 ……………………………………………… Operation display lamp 19 ………………………………………… Abnormality display lamp 20 ………………………… …………………… End indicator lamp 21 ………………………………………… Operation switch 23, 24 ……………………………… Connection line

Claims (3)

[Claims] 1. A refrigerant recovered from a refrigerant recovery device is taken in through an inlet operation valve and compressed by a compressor, and the refrigerant compressed by the compressor is condensed by a condenser and supplied to a dryer via a receiver. In a refrigerant recovery and regeneration device for recovering water and impurities in the refrigerant in the dryer after recovering from the outlet operation valve, a universal balance cylinder is connected to the outlet operation valve, and a platform scale for measuring the filling capacity of the general purpose refrigerant cylinder Is provided, and the drive of the compressor is stopped when the measured value of the platform scale reaches the maximum filling amount corresponding to the filling capacity of the general-purpose refrigerant cylinder. 2. The refrigerant recovered from the refrigerant recovery device is taken in through an inlet operation valve and compressed by a compressor, and the refrigerant compressed by the compressor is condensed by a condenser and supplied to a dryer via a receiver. In a refrigerant recovery / regeneration device that removes water and impurities in the refrigerant in the dryer and then recovers from the outlet operation valve, a general-purpose refrigerant cylinder is configured to be connectable to the outlet operation valve, and the filling capacity of the general-purpose refrigerant cylinder is measured. With a platform scale to set, the upper and lower limit setting switch that can freely set the filling upper limit value and the filling lower limit value corresponding to the filling capacity of the general-purpose refrigerant cylinder mounted on the platform scale, and the general-purpose on the platform scale. When a refrigerant cylinder is placed and the weighing value of the platform scale is between the filling upper limit value and the filling lower limit value, it operates only when the weighing value of the platform scale exceeds the filling upper limit value. And a charging control device provided with a charging operation switch that does not operate when the charging amount is below the lower limit of charging. 3. A heat exchanger is provided between the dryer and the outlet operation valve, and a part of the refrigerant output from the dryer as a refrigerant of the heat exchanger is supplied through a caterpillar tube. The refrigerant recovery and regeneration device according to claim 1.