JP3091264U - Fluorocarbon recovery system - Google Patents

Abstract

(57) [Problem] To efficiently and safely recover fluorocarbon used in a refrigerant, a foaming agent, a cleaning agent, and the like from a product using the same. SOLUTION: For example, fluorocarbon gas of a commercial air conditioner 1... The liquefied fluorocarbon is supplied to the coiled copper pipe of the cooling tank 6 and then stored in the cylinder 7.
The cylinder 7 is mounted on a weight limiter 8, and the weight limiter checks whether the weight of the cylinder has exceeded a predetermined value, and outputs a control signal when it is determined that the weight has exceeded the predetermined value. Upon receiving this control signal, the overfill adapter 9 automatically sets each of the recovery machines 3, 4, and 5 to the recovery stop mode. The reason why the liquefied fluorocarbon is put into the cooling tank 6 and then collected in the cylinder 7 is to suppress the saturation pressure of the liquefied fluorocarbon collected in the cylinder.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  TECHNICAL FIELD The present invention relates to a recovery system for fluorocarbon (commonly known as CFC). In particular Operate multiple recovery means at the same time, and collect the recovered fluorocarbon. A collection system that prevents overfilling even for storage means without a sensor. Concerning

[0002]   The fluorocarbons to be collected are ・ CFC (chlorofluorocarbon) ・ HCFC (hydrochlorofluorocarbon) ・ HFC (hydrofluorocarbon) Including various types such as.

[0003]   Used as a refrigerant, foaming agent, cleaning agent, etc., causing ozone layer destruction and global warming Efficient and safe recovery of fluorocarbons from It is desirable that the present invention meet such a demand.

[0004]

[Prior art]

  Generally, the cylinder that stores the recovered fluorocarbon has a float sensor. Some are equipped with and some are not.

[0005]   When using a cylinder with a float sensor, for example, 90% of its internal space When the fluorocarbon is filled in the The carbon recovery machine stops automatically.

[0006]   When using a cylinder without a float sensor, place the cylinder on the scale. Filling the fluorocarbon with the scale left, the operator can display the weight of this scale. Stops the operation of the fluorocarbon recovery machine when it is confirmed that I am letting you.

[0007]

[Problems to be solved by the device]

  Thus, the conventional fluorocarbon using the cylinder without the float sensor The method of recovery is the completion of the filling process for the cylinder, that is, fluorocarbon recovery. The operator's judgment (about the weight display of the scale) is based on the timing setting of the operation end of the machine However, the fluorocarbon overfilled state may occur due to misjudgment. There was a problem that it was easy and could lead to a cylinder explosion.

[0008]   This means that there are multiple devices This becomes remarkable when using the fluorocarbon recovery machine at the same time.

[0009]   Therefore, in the present invention, a system that uses multiple fluorocarbon recovery means simultaneously is used. Assuming a system, we will detect the weight of the fluorocarbon storage means during recovery work. By automatically stopping the operation of the recovery means when it reaches a predetermined value, Improve the efficiency of fluorocarbon recovery even when using storage means without a funnel sensor -The purpose is to improve safety.

[0010]   In addition, by cooling the collected fluorocarbon and sending it to the storage means, This reduces the fluorocarbon saturation pressure inside the storage means to further improve recovery efficiency. The purpose is to improve.

[0011]

[Means for Solving the Problems]

  The present invention solves these problems as follows. (1) Fluorocarbon recovery operation mode and recovery stop mode A plurality of recovery means (for example, recovery machines 3 to 5 described below) and the recovery means. A storage means (for example, a cylinder 7 described later) for storing the collected fluorocarbon, and The fact that the weight of the storage means has reached a predetermined value is detected from the recovery operation mode. Weight detection means for outputting a signal for switching to the collection stop mode (for example, a weight recovery unit described later). Based on the switching signal from the weight shift means and the mitter 8), the recovery means is activated. Control means for setting each of them to the recovery stop mode (for example, an overfill prevention adapter described later) And 9). (2) In the above (1), the fluorocarbon recovered by the recovery means is A cooling means (for example, a cooling tank 6 described later) for cooling is provided at a stage before the storage means. It is provided in the form of a process.

[0012]   According to the present invention, as described in (1) above, it is possible to collect the fluoros collected from a plurality of collection means. The weight of the storage means for storing carbon dioxide is detected, and this is equivalent to, for example, overfilling. When it enters the range, the operation of each recovery means is automatically stopped, Improves fluorocarbon recovery efficiency even when using storage means without sensors At the same time, the safety of recovery workers is ensured.

[0013]   Further, as in (2) above, fluorocarbons recovered from a plurality of recovery means are used. After cooling the fluorocarbon, i.e. lowering the saturation pressure of this fluorocarbon, Tiers, which makes the fluorocarbon storage process more efficient and We are working to make work safer.

[0014]

[Embodiment of device]

  An embodiment of the present invention will be described with reference to FIGS.

[0015]   here, FIG. 1 shows a fluorocarbon recovery system using multiple recovery machines, FIG. 2 shows a circuit configuration of the overfill prevention adapter of FIG. FIG. 3 shows the inside of the cooling tank of FIG. Fig. 4 shows the case of single recovery without a cooling tank and two recovery machines at the same time. The test data comparing the case of operating and using a cooling bath are shown.

[0016]   1 to 3, 1 is a collection target device such as a commercial air conditioner that uses fluorocarbon 2 indicates the fluorocarbon gas taken out from each device 1 to be collected, Manifold to arrange, 3 to 5 are times for sucking and compressing the fluorocarbon gas of each recovery target device 1 to liquefy it. Collection machine, Reference numeral 6 denotes a cooling medium (for example, a state of 0 ° C. in which ice and water are added) from each of the recovery machines 3 to 5. Cooling tank for cooling the liquefied fluorocarbon of 6a A coil-shaped copper pipe for passing through, 6b is a valve for discharging the cooling medium, 7 is a cylinder for storing cooled liquefied fluorocarbon, No. 8 puts the cylinder 7 on and checks whether the weight exceeds a predetermined set value. 8a is a weight limiter that outputs a control signal when it is determined that Switch for control signal that operates in the case of 9 indicates each of the recovery machines 3 to 5 based on the control signal from the weight limiter 8. Overfill prevention adapter that automatically sets the recovery stop mode, 9a is a fuse, 9b is a fuse Switch for setting ON / OFF of the adapter itself, 9c is an electromagnetic relay, 9 d is an outlet, Are shown respectively.

[0017]   The cylinder 7 may have no float sensor. In addition, the device to be collected 1-Maniho Field 2-collector 3,4,5-cooling tank 6-cylinder 7 It is connected by a pipe for passing carbon.

[0018]   Due to the suction action of the recovery machines 3 to 5, the fluorocarbon of each recovery target device 1 is connected to the manifold. It moves to the collection machine through the field 2. Examples of this recovery machine include Taxco Japan A "Fluoromizer" manufactured by the company is used. In addition, the recovery machines 3 to 5 are the recovery target devices 1 The liquid fluorocarbon can also be recovered.

[0019]   The recovery machines 3 to 5 compress the liquefied fluorocarbon gas to liquefy it, and then cool the tank 6. To the copper pipe 6a.

[0020]   Liquefied fluorocarbon after cooling in the process of passing through the copper pipe 6a is stored in the cylinder 7. It is stored.

[0021]   After cooling, the saturation pressure in the cylinder containing the liquefied fluorocarbon is kept low. Since the burden on the recovery machine is reduced, the fluorocarbon recovery work is more effective. Can be efficient and secure.

[0022]   The total weight of the cylinder 7, that is, the liquefied fluorocarbon is filled therein. The entire weight at this time is constantly detected by the weight limiter 8. This weight limiter For example, "TA110WX" manufactured by Taxco Japan Ltd. is used.

[0023]   The weight limiter 8 outputs a control signal when the detected value exceeds a predetermined reference value. The switch 8a is turned on and sends a control signal to the overfill prevention adapter 9.

[0024]   Then, the overfill prevention adapter 9 that receives this control signal is 9c operates, and each recovery machine 3-5 is operated to recover the fluorocarbons up to that time. A switching signal for changing the recovery mode to the recovery stop mode is sent to the recovery machine.

[0025]   Each of the recovery machines 3 to 5 sets its own device in the recovery stop mode based on this switching signal. It

[0026]   As shown in Fig. 4, in the case of two recovery machines using a cooling tank, one recovery machine is used. Compared to the single recovery without a cooling tank, the recovery amount after 15 minutes from the start of the recovery process is about It is 1.6 times. About 5 times (= 1.64 times) even 5 minutes after the start of the recovery process /1.24).

The respective data when the outside air temperature is 13.5 ° C., for example, 30 minutes after the start of the recovery process, are as follows: Recovery machine suction pressure (kg / cm ² G) Single recovery: 2.0 2 recovery: 2.0 b. Discharger discharge pressure (kg / cm ² G) Single recovery: 10.0 2 recovery: 9.0 c. Recovery amount (kg) Single recovery: 6.0 Two recovery: 10.0 d. Temperature of inlet and outlet of cooling layer Recovery of 2 units (inlet): 18.0 ° C Recovery of 2 units (outlet): 11.0 ° C e. Cylinder inlet temperature independent recovery: 20.0 ° C 2 units recovery: 12.0 ° C. The inside of the cooling layer is at about 0 ° C.

[0028]

[Effect of device]

  In the present invention, as described above, the fluorocarbons recovered from the plurality of recovery means are collected. Detect the weight of the storage means to be stored, and enter the range corresponding to overfilling, for example. If you don't have a float sensor, it will automatically stop the operation of each recovery means. Even if a method is used, recovery efficiency of fluorocarbon is improved and recovery work is performed. The safety of the person can be secured.

[0029]   In addition, after cooling the fluorocarbons recovered from multiple recovery means, Since the saturation pressure of this fluorocarbon is lowered and held in the storage means, Further improve the efficiency of recovery and storage of Luorocarbon and work safety be able to.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a fluorocarbon recovery system using a plurality of recovery machines of the present invention.

2 is an explanatory view showing an overfill prevention adapter of FIG. 1. FIG.

3 is an explanatory view showing the cooling tank of FIG. 1. FIG.

FIG. 4 is an explanatory view showing test data comparing the case of the single recovery of the present invention without using a cooling tank and the case of simultaneously operating two recovery machines and using a cooling tank. is there.

[Explanation of symbols]

1: Fluorocarbon recovery target equipment 2: Manifold 3-5: Recovery machine 6: Cooling tank 6a: Coil-shaped copper pipe 6b: valve 7: Cylinder for storing liquefied fluorocarbon 8: Weight limiter 8a: Control signal switch 9: Overfill prevention adapter 9a: fuse 9b: operation switch 9c: Electromagnetic relay 9d: outlet

Claims (2)

[Scope of utility model registration request] 1. A plurality of recovery means, each of which is set in a fluorocarbon recovery operation mode and a recovery stop mode, a storage means for storing the fluorocarbon recovered by the recovery means, and a weight of the storage means having a predetermined value. A weight detection means for detecting that the recovery operation mode is switched to the recovery stop mode and outputting the switching signal from the weight detection means to the recovery means based on the switching signal. And a control unit for setting the above. At least, a fluorocarbon recovery system is provided. 2. The recovery of fluorocarbon according to claim 1, characterized in that cooling means for cooling the fluorocarbon recovered by the recovery means is provided in such a manner as to be a treatment process in a stage prior to the storage means. system.