JPH08261607A - Mixed refrigerant feeding device and mixed refrigerant feeding method - Google Patents

Abstract

PURPOSE: To steadily maintain stability in safekeeping and feeding time by installing a first storage means which stores mixed refrigerants and a second storage means which stores refrigerants which are non-azeotropy and feeding refrigerants in a refrigeration cycle independently from these means. CONSTITUTION: Refrigerants mixed with HFC-134a and HFC-32 and HFC-125, which are not azetropic to HFC-134a, are stored in storage vessels 8 and 9. Both HFC-32 and HFC-125 are pseudo azeotropic refrigerants to each other. At first, a changeover valve 7a is opened so as to feed HFC-134a in a refrigerator air conditioning device 1. When the fed amount is measured with a mass flow rate meter 6 and a proper amount of refrigerants is fed, the changeover valve 7a is closed. Then, a changeover valve 7b is opened so as to feed the remaining HFC-32 and pseudo-azetropic mixed refrigerants. When a proper amount of refrigerants is fed, the changeover valve 7b is closed. HFC-32, which is a combustible refrigerant, can be treated as a non-combustible refrigerant by mixing with HFC-125.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling device and a filling method for filling a refrigerating cycle such as an air conditioner / refrigerator with a mixed refrigerant.

[0002]

2. Description of the Related Art An example of a conventional mixed refrigerant charging device is shown in FIG. In FIG. 7, 1 is an air-conditioning refrigerating device, 2 is a heat exchanger, 3 is a throttle, 4 is a compressor, 5a and 5c are service valves used for vacuuming and refrigerant charging, 6 is a mass flow meter, and 7
Is a switching valve, and 8 is a storage container filled with a non-azeotropic mixed refrigerant.

The above operation will be described below. The air-conditioning refrigeration system 1 is evacuated in advance, and by opening the switching valve 7, the mixed refrigerant filled in the refrigerant storage container 8 is guided to the refrigeration system 1. Refrigerant filling amount is mass flow meter 6
The switching valve 7 is opened / closed based on the signal measured at. The composition of the non-azeotropic mixed refrigerant changes as the residual content in the storage container decreases, and the composition of the enclosed refrigerant depends on the composition of the residual material in the storage container, and the refrigerant cannot be filled with a stable composition.

The example shown in FIG.
This is the invention disclosed in Japanese Patent No. 68. 1 is a cylinder filled with a refrigerant having a low saturation pressure, 2 is a cylinder filled with a refrigerant having a high saturation pressure, 5 is a vacuum pump, 6 is a charging cylinder, 3 / 4.6.8 is a switching valve, The device comprises a refrigeration circuit a which forms a refrigeration cycle with them.

The operation of the above invention will be described below. The switching valves 3, 4, and 8 are closed, the switching valve 6 is opened, the inside of the charging cylinder 7 is evacuated by using the vacuum pump 5, and then the switching valve 6 is closed. Next, the switching valve 3 is opened to fill the charging cylinder with a refrigerant having a low saturation pressure, and the switching valve 3 is closed to open the switching valve 4 so that the refrigerant 2 having a high saturation pressure is charged first. The charging cylinder 7 is filled by utilizing the difference in the saturated pressure. As a result, a mixed refrigerant of an appropriate ratio is produced in the charging cylinder 7, and the refrigeration circuit is filled with the mixed refrigerant by opening the switching valve 8.

[0006]

In a conventional device for directly charging a refrigerating and air-conditioning device from a storage device for a mixed refrigerant filled at a certain composition ratio, the refrigerant in the container is considered due to the characteristics of the mixed refrigerant containing a non-azeotropic refrigerant. With the decrease of the refrigerant, the composition ratio of the refrigerant changes and it becomes impossible to supply the refrigerant with a stable composition ratio.
When the remaining amount is about 10% to 20%, the level becomes unusable as it is, and there is a problem that it is uneconomical because the refrigerant must be discarded without being used up.

In the device as in the invention of Japanese Utility Model Laid-Open No. 64-22968, a refrigeration circuit is sequentially filled from a refrigerant having a low saturation pressure through a switching valve from a closed container filled with a plurality of refrigerants. When a sealed container filled with a flammable refrigerant is included, there is a problem that there is a risk of catching fire when a gas leaks during storage or during filling. In addition, when the refrigerants having an azeotropic or pseudo-azeotropic relationship are separately filled, there is a problem that the filling process increases and the number of sealed containers filled with the refrigerant placed in the filling process increases.

When a non-azeotropic mixed refrigerant is used in the inspection of a refrigerant circuit system including a compressor in the manufacturing process, it takes time until the circulation composition stabilizes, and the same handling as a single refrigerant cannot be performed. There are problems such as being troublesome.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to fill the mixed refrigerant with a stable composition ratio and to secure the stability during storage and filling, and in the manufacturing process. The purpose is to facilitate the handling of.

It is an object of the first invention to provide a mixed refrigerant charging device capable of charging a mixed refrigerant with a stable composition ratio and steadily ensuring stability during storage / filling.

A second object of the present invention is to provide a mixed refrigerant charging device capable of charging the mixed refrigerant in a stable composition ratio and more steadily securing stability during storage and charging.

A third aspect of the present invention aims to provide a mixed refrigerant charging method which facilitates handling in an inspection process and improves reliability.

A fourth object of the present invention is to provide a mixed refrigerant charging method which facilitates handling in the inspection process and further improves reliability.

A fifth aspect of the present invention is to provide a mixed refrigerant charging device capable of charging the mixed refrigerant at a stable composition ratio and steadily ensuring safety against gas leakage and ignition in a mixed refrigerant containing a flammable refrigerant. And

A sixth object of the present invention is to provide a mixed refrigerant charging method which facilitates handling in the inspection process, improves reliability, and steadily ensures safety in the inspection process.

It is an object of the seventh invention to provide a mixed refrigerant charging method which can be easily handled in the inspection process and can be further improved in reliability.

An eighth object of the present invention is to provide a mixed refrigerant charging method capable of avoiding the danger of flammable refrigerant in the inspection step, shortening the inspection time, and filling easily.

It is an object of the ninth invention to obtain a mixed refrigerant charging method which can shorten the inspection time.

A tenth aspect of the invention is to provide a mixed refrigerant charging method which can shorten the inspection time and can easily confirm a leak check.

[0020]

According to a first aspect of the present invention, there is provided a first storage means for storing an azeotropic or pseudo-azeotropic mixed refrigerant, and a second storage means for storing a non-azeotropic refrigerant. Storage means is provided, and the refrigeration cycle is filled independently of each of these storage means.

In the second invention, the first storage means stores the pseudo-azeotropic mixed refrigerant having a temperature change of about 1 deg at the same pressure in the wet vapor range of the Mollier diagram.

In the third aspect of the invention, the refrigerant circuit system is inspected using a single non-azeotropic refrigerant contained in the mixed refrigerant to be filled in the manufacturing process of the refrigerating and air-conditioning apparatus, and the remaining refrigerant is filled after the inspection is completed. To do.

In the fourth aspect of the invention, the refrigerant circuit system is inspected using the azeotropic or pseudo-azeotropic mixed refrigerant contained in the mixed refrigerant to be filled in the refrigerating machine manufacturing process, and the remaining refrigerant is filled after the inspection is completed. To do.

In the fifth aspect of the present invention, means for storing an azeotropic / pseudo-azeotropic mixed refrigerant that contains at least one flammable refrigerant and is incombustible in a mixed state, and a refrigerant that is non-azeotropic with the refrigerant are stored. And means for filling the refrigerating apparatus independently of each of these means.

In the sixth aspect of the invention, when the mixed refrigerant to be filled in the refrigerating apparatus manufacturing process contains a combustible refrigerant, the refrigerant circuit system is inspected using the non-combustible non-azeotropic refrigerant contained in the mixed refrigerant. After the inspection, fill the remaining refrigerant.

In the seventh invention, when the mixed refrigerant to be filled in the manufacturing process of the refrigerating apparatus is an azeotropic or pseudo-azeotropic mixed refrigerant containing a combustible refrigerant, and a refrigerant which is non-azeotropic and non-combustible with them, The refrigerant circuit system is inspected using a mixed refrigerant containing a flammable refrigerant, and after the inspection is completed, the remaining refrigerant is filled.

In the eighth aspect of the present invention, the refrigerant circuit system is inspected by using HFC-134a in the manufacturing process of the refrigerating apparatus, and after completion of the inspection, means for storing the pseudo-azeotropic mixed refrigerant of HFC-32 and HFC-125. Fill from.

In the ninth aspect of the invention, the refrigerant circuit system is inspected using HFC-134a in the manufacturing process of the refrigerating apparatus, and HFC-125 and HFC-143a are filled after the inspection is completed.

In the tenth aspect of the invention, the refrigerant circuit system is inspected by using a pseudo-azeotropic mixed refrigerant of HFC-32 and HFC-125 in the manufacturing process of the refrigerating apparatus, and after the inspection, HFC is tested.
-134a is filled.

[0030]

In the first aspect of the present invention, the refrigerant charging device can supply a mixed refrigerant having a stable composition all the time.

According to the second aspect of the present invention, this refrigerant charging device can supply a mixed refrigerant having a stable composition from the beginning.

According to the third aspect of the present invention, although it is a manufacturing process of a refrigerating and air-conditioning apparatus using a mixed refrigerant, it can be handled in the same manner as the conventional single refrigerant inspection process.

In the fourth invention, the same handling as in the conventional single refrigerant inspection step is possible.

In the fifth aspect of the present invention, this filling device can supply a mixed refrigerant having a stable composition all the time, and
A mixed refrigerant containing a flammable refrigerant can be handled in the same manner as a non-flammable refrigerant, and safety against ignition or the like at the time of gas leakage can be secured.

According to the sixth aspect of the present invention, although it is a manufacturing process of a refrigerating and air-conditioning apparatus using a mixed refrigerant, the inspection process can be handled in the same manner as the conventional single refrigerant inspection process, and the inflammable refrigerant is used in the inspection process. By not including, it is possible to ensure safety in the inspection process.

In the seventh invention, the same handling as in the conventional single refrigerant inspection step is possible.

In the eighth aspect of the invention, in the inspection process of the refrigerating and air-conditioning apparatus that uses HFC-32, which is a three-component mixed refrigerant containing a flammable refrigerant, HFC is used without using the three-component mixed refrigerant.
By using -134a, the risk of flammability can be avoided, and it does not take time for the circulation composition to stabilize like a mixed refrigerant, so the inspection time can be shortened. Further, since HFC-134a has the lowest saturation pressure among the components of this mixed refrigerant, the remaining refrigerant can be easily filled.

In the ninth aspect of the present invention, when a single component refrigerant is used without using a non-azeotropic mixed refrigerant in the inspection process of a refrigerating apparatus using a mixed refrigerant, the circulation composition is stabilized like a mixed refrigerant. There is no loss such as taking time.

When a non-azeotropic mixed refrigerant is used, it takes time for the circulation composition to stabilize and the inspection time may become long. However, in the tenth invention, if a pseudo-azeotropic mixed refrigerant of HFC-32 and HFC-125 is used, it can be handled in the same manner as in the case of a single refrigerant, and this mixed refrigerant is a conventional HCFC-22. Since the saturation pressure is higher than
It will be easier to confirm the leak check.

[0040]

【Example】

Example 1. FIG. 1 is a first embodiment of the present invention. In the figure, 1 is a refrigerating and air conditioning system, 2a and 2b are heat exchangers, 3 is a throttle, 4 is a compressor, 5a and 5ab are service valves, 6 is a mass flow meter, 7a and 7b are switching valves, and 8 is HFC-134.
The storage device 9 is filled with a, and 9 is a storage container for a mixed refrigerant of HFC-32 and HFC-125 that is non-azeotropic with HFC-134a. HFC-32 and HFC-125 are pseudo-azeotropic refrigerants for each other, and HFC-32 is flammable by itself. Here, the pseudo-azeotropic refrigerant has a temperature change of 1 de at the same pressure in the wet vapor range of the Mollier diagram.
It is about g. The refrigerating and air-conditioning apparatus 1 is evacuated in advance using the service valves 5a and 5b.
The refrigerant during operation of the refrigerating and air-conditioning apparatus 1 is compressed to a high pressure by the compressor 4, then condensed by the heat exchanger 2a, decompressed by the throttle 3, evaporated by the heat exchanger 2b and becomes a low pressure and returns to the compressor 4. .

First, the switching valve 7a is opened, and the HFC-134 is opened.
The refrigerating air-conditioning apparatus 1 is filled with a. Mass flow meter 6
The switching valve 7a is closed when a proper amount is measured by.
Next, the switching valve 7b is opened, and the remaining HFC-32 and HFC
Fill the pseudo-azeotropic refrigerant mixture of -125. The switching valve 7b is closed when an appropriate amount is filled.

When the flammable refrigerant HFC-32 is filled alone, there is a risk of ignition when gas leaks and there is a problem in safety, but it is handled as a non-flammable refrigerant by mixing HFC-32 and HFC-125. In addition, since the refrigerants have almost the same saturation temperature, they leak together when they are mixed, so that they can be avoided from the risk of ignition.

In the method of filling the same storage device with the above-mentioned three-type mixed refrigerant and then filling the same in the air-conditioning device, as the residual amount in the storage device decreases, the HFC changes due to the difference in saturation pressure.
The composition of -134a increases and all the refrigerant in the storage container cannot be used up, resulting in waste, but since the composition of the pseudo-azeotropic refrigerant hardly changes, the composition of HFC-32 and HFC-125 does not change. All the mixed refrigerants can be used up. By the method described above, it is possible to eliminate waste by filling the non-azeotropic refrigerant separately and to stably supply the refrigerant.

When the above-mentioned device is used for servicing an air conditioner (additional charging of refrigerant, etc.), inspection, etc., there is no danger of catching fire and it is not necessary to select a work place, so that safe work can be performed and the refrigerant is wasted. And the number of cylinders can be minimized. Further, at this time, if the charging is performed in the above-described order, the charging can be performed without carrying the pressurizer of the refrigerant.

Example 2. FIG. 2 shows a second embodiment of the present invention. The figure is a manufacturing line diagram of an air conditioner. 1 is a refrigerating air-conditioning system, 2a and 2b are heat exchangers, 3 is a throttle, 4 is a compressor, 5a and 5b are service valves for evacuation and refrigerant charging, 6 is a mass flow meter, 7a and 7b are switching valves, 8 is HF
Storage container filled with C-134a, 9 is HFC-
The storage container 10 filled with the mixed refrigerant of 32 and HFC-125 flows in the direction of the arrow on the conveyor. 11 is an inspection booth where leak checks and performance tests are conducted.

The inside of the refrigerating and air-conditioning apparatus is evacuated in advance. First, the switching valve 7a is opened and the HFC-134a refrigerant is filled in the air conditioner 1. Switching valve 7 when appropriate amount is filled
a is closed and the service valves 5a and 5b are disconnected from the filling device. Next, inspections such as performance tests and leak checks are performed, and after completion, the switching valve 7b that connects the service valves 5a and 5b to the filling device is opened to fill the mixed refrigerant of HFC-32 and HFC-125. When the appropriate amount is filled, the switching valve 7b is closed.

Conventionally, since a single refrigerant is used, the refrigerant is sealed before entering the line inspection and is shipped as it is after the inspection. However, in the case of a non-azeotropic mixed refrigerant, it takes time for the circulation composition to stabilize and the inspection time becomes long. Therefore, if the inspection is performed only by filling the HFC-134a, the same handling as the conventional single refrigerant can be performed, and the inspection time can be shortened. Further, since HFC-134a is a nonflammable refrigerant, even if leakage occurs during inspection, there is no danger of ignition and it is safe.

Example 3. FIG. 3 is a third embodiment of the present invention. The figure is a manufacturing line diagram of an air conditioner. 1 is a refrigerating air-conditioning system, 2a and 2b are heat exchangers, 3 is a throttle, 4 is a compressor, 5a and 5b are service valves for evacuation and refrigerant filling, 6 is a mass flow meter, 7a and 7b are switching valves, 8 is H
Storage container filled with FC-134a, 9 is HFC
The storage container 10 filled with the mixed refrigerant of -32 and HFC-125 flows in the direction of the arrow on the conveyor. 11 is an inspection booth where leak checks and performance tests are conducted.

The inside of the refrigerating and air-conditioning apparatus is evacuated in advance. First, the switching valve 7a is opened and HFC-32 and HFC are opened.
The mixed refrigerant of −125 is filled in the air conditioner 1. When the appropriate amount is filled, the switching valve 7a is closed and the service valves 5a, 5
Separate b from the filling device. Next, perform inspections such as performance tests and leak checks, and after completion, service valves 5a and 5b
And the filling device are connected, the switching valve 7b is opened, and HFC-134
Fill with the mixed refrigerant of a. Switching valve 7b when a proper amount is filled
Close.

Conventionally, since a single refrigerant has been used, the refrigerant is sealed before entering the line inspection and shipped as it is after the inspection is completed. However, in the case of a non-azeotropic mixed refrigerant, it takes time for the circulation composition to stabilize and the inspection time becomes long. Therefore, if the inspection is performed only by filling the azeotropic mixed refrigerant of HFC-32 and HFC-125, the saturation pressures are almost equal, so that the same handling as the conventional single refrigerant can be performed and the inspection time can be shortened. In addition, HFC-32 and HFC-12
Since the mixed refrigerant of No. 5 can be handled as a non-flammable refrigerant, even if a leak occurs during the inspection, there is no danger of ignition and it is safe. Further, since the mixed refrigerant of HFC-32 and HFC-125 has a higher saturation pressure than HCFC-22, it is possible to more reliably perform the leak check.

Embodiment 4 FIG. FIG. 4 is a fourth embodiment of the present invention. The figure is a manufacturing line diagram of an air conditioner. 1 is a refrigerating and air-conditioning device, 2a and 2b are heat exchangers, 3 is a throttle, 4 is a compressor, 5a and 5b are service valves for evacuation and refrigerant filling, 6 is a mass flow meter, and 7a, 7b and 7c are switching Valve, 8
Is a storage container filled with HFC-134a, 12 is a storage container filled with HFC-143a refrigerant, and 13 is H
The storage container 10 filled with the FC-125 refrigerant flows on the conveyor in the direction of the arrow. Reference numeral 11 is an inspection booth where leak checks and performance tests are conducted.

The refrigerating and air-conditioning apparatus 1 is evacuated in advance. First, the switching valve 7a is opened and the HFC-134a refrigerant is filled in the air conditioner 1. When the appropriate amount is filled, the switching valve 7a is closed and the service valves 5a and 5b and the filling device are separated. Next, inspections such as a performance test and a leak check are performed, and after completion, the service valves 5a and 5b are connected to the filling device. Next, the switching valves 7b and 7c are opened one after another, and the remaining HFC is opened.
-125, HFC-143a refrigerant is charged.

Conventionally, since a single refrigerant was used, the refrigerant is sealed before entering the line inspection and is shipped as it is after the inspection is completed. However, in the case of a non-azeotropic mixed refrigerant, it takes time for the circulation composition to stabilize and the inspection time becomes long. Therefore, if the inspection is performed only by filling the HFC-134a, the same handling as the conventional single refrigerant can be performed, and the inspection time can be shortened.

Example 5. FIG. 5 is a fifth embodiment of the present invention. The figure is a manufacturing line diagram of an air conditioner. 1 is a refrigerating and air-conditioning device, 2a and 2b are heat exchangers, 3 is a throttle, 4 is a compressor, 5a and 5b are service valves for evacuation and refrigerant filling, 6 is a mass flow meter, and 7a, 7b and 7c are switching Valve, 8
Is a storage container filled with HFC-134a, 12 is a storage container filled with HFC-143a refrigerant, and 13 is H
The storage container 10 filled with the FC-125 refrigerant flows on the conveyor in the direction of the arrow. 11 is an inspection booth where leak checks and performance tests are conducted.

The refrigerating and air-conditioning apparatus 1 is evacuated in advance. First, the switching valve 7a is opened to fill the HFC-143a refrigerant into the air conditioner 1. When the appropriate amount is filled, the switching valve 7a is closed and the service valves 5a and 5b are disconnected from the filling device. Next, inspections such as performance tests and leak checks are performed, and after completion, the service valves 5a and 5b are connected to the filling device. Next, the switching valves 7b and 7c are opened one after another and the remaining HFC-
125 and HFC-134a refrigerant are filled.

Conventionally, since a single refrigerant is used, the refrigerant is sealed before entering the line inspection and is shipped as it is after the inspection is completed. However, when it becomes a non-azeotropic mixed refrigerant, the circulation composition becomes stable. It takes time and inspection time becomes long. Therefore,
If the inspection is performed only by filling the HFC-143a, the same handling as the conventional single refrigerant can be performed and the inspection time can be shortened.

Example 6. FIG. 6 is a sixth embodiment of the present invention. The figure is a manufacturing line diagram of an air conditioner. 1 is a refrigerating and air-conditioning device, 2a and 2b are heat exchangers, 3 is a throttle, 4 is a compressor, 5a and 5b are service valves for evacuation and refrigerant filling, 6 is a mass flow meter, and 7a, 7b and 7c are switching Valve, 8
Is a storage container filled with HFC-134a, 12 is a storage container filled with HFC-143a refrigerant, and 13 is H
The storage container 10 filled with the FC-125 refrigerant flows on the conveyor in the direction of the arrow. 11 is an inspection booth where leak checks and performance tests are conducted.

The refrigerating and air-conditioning apparatus 1 is evacuated in advance. First, the switching valve 7a is opened to fill the HFC-125 refrigerant into the air conditioner 1. Switching valve 7 when appropriate amount is filled
Close a and disconnect the service valves 5a and 5b from the filling device. Next, inspections such as a performance test and a leak check are performed, and after completion, the service valves 5a and 5b are connected to the filling device. Next, the switching valves 7b and 7c are opened one after another, and the remaining HF
The C-143a / HFC-134a refrigerant is charged.

Conventionally, since a single refrigerant has been used, the refrigerant is sealed before starting the line inspection and is shipped as it is after the inspection is completed. However, when it comes to non-azeotropic mixed refrigerants,
It takes time for the circulation composition to stabilize, and the inspection time increases. Therefore, if the inspection is performed only by filling with HFC-125, the same handling as the conventional single refrigerant can be performed, and the inspection time can be shortened.

This refrigerant filling device can reduce the cost because the number of cylinders and the number of steps can be reduced as compared with the case where the number of cylinders is separately filled without changing the composition and discarding unused refrigerant.

With this manufacturing apparatus, the inspection process of an air conditioner using a mixed refrigerant can be handled like a conventional single refrigerant,
Since it does not take time for the circulation composition to stabilize like the mixed refrigerant, the inspection time can be shortened.

With this manufacturing apparatus, the inspection process of the air conditioner using the mixed refrigerant can be handled in the same manner as the conventional single refrigerant,
Since it does not take time for the circulation composition to stabilize like the mixed refrigerant, the inspection time can be shortened.

With this refrigerant filling device, a mixed refrigerant containing a flammable refrigerant can be handled as an incombustible refrigerant, and it is not necessary to provide a safety device for flammability, and peripheral equipment can be freely installed. In addition, the number of cylinders and the number of filling steps can be reduced compared to filling all separately, resulting in cost savings.

With this manufacturing apparatus, the inspection process of the air conditioner using the mixed refrigerant can be handled in the same manner as the conventional single refrigerant,
Since it does not take time for the circulation composition to stabilize like the mixed refrigerant, the inspection time can be shortened.

With this manufacturing apparatus, the inspection process of the air conditioner using the mixed refrigerant can be handled in the same manner as the conventional single refrigerant,
Since it does not take time for the circulation composition to stabilize like the mixed refrigerant, the inspection time can be shortened. Moreover, since it contains a flammable refrigerant but can be handled as a non-flammable refrigerant, it can be freely installed without considering the risk of ignition such as installation of peripheral equipment.

With this manufacturing apparatus, the inspection process of the air conditioner using the mixed refrigerant can be handled in the same manner as the conventional single refrigerant,
Since it does not take time for the circulation composition to stabilize like the mixed refrigerant, the inspection time can be shortened. HFC-134a has a saturation pressure of HFC-32, HFC
Since it is lower than -125, it is not necessary to pressurize to fill the remaining refrigerant.

With this manufacturing apparatus, the inspection process of the air conditioner using the mixed refrigerant can be handled in the same manner as the conventional single refrigerant,
Since it does not take time for the circulation composition to stabilize like the mixed refrigerant, the inspection time can be shortened. HFC-134a has a saturation pressure of HFC-143a, H
Since it is lower than FC-125, there is no need to pressurize to fill the remaining refrigerant.

With this manufacturing apparatus, the inspection process of the air conditioner using the mixed refrigerant can be handled in the same manner as the conventional single refrigerant,
Since it does not take time for the circulation composition to stabilize like the mixed refrigerant, the inspection time can be shortened. The mixed refrigerant of HFC-32 and HFC-125 is the conventional H
Since the saturation pressure is higher than that of the CFC-22 refrigerant and the three-type mixed refrigerant, the leak detection check becomes more reliable than before.

[0069]

According to the first aspect of the present invention, it is possible to obtain a mixed refrigerant charging device capable of charging a mixed refrigerant at a stable composition ratio and steadily ensuring stability during storage and charging.

According to the second aspect of the present invention, it is possible to obtain the mixed refrigerant charging device which can be charged with the mixed refrigerant at a stable composition ratio and can more stably ensure the stability during storage and during charging.

According to the third aspect of the present invention, it is possible to obtain a mixed refrigerant charging method which facilitates handling in the inspection step and improves reliability.

According to the fourth aspect of the invention, it is possible to obtain a mixed refrigerant charging method which facilitates handling in the inspection step and further improves reliability.

According to the fifth aspect of the present invention, it is possible to provide a mixed refrigerant charging device capable of charging a mixed refrigerant at a stable composition ratio and steadily ensuring safety against gas leakage and ignition in a mixed refrigerant containing a flammable refrigerant. You can

According to the sixth aspect of the present invention, it is possible to obtain a mixed refrigerant charging method which facilitates handling in the inspection process, improves reliability, and steadily ensures safety in the inspection process.

According to the seventh aspect of the present invention, it is possible to obtain a mixed refrigerant charging method which can be easily handled in the inspection step and can be further improved in reliability.

According to the eighth aspect of the present invention, it is possible to obtain a mixed refrigerant filling method which can avoid the danger of flammable refrigerant in the inspection process, shorten the inspection time, and can be filled easily.

According to the ninth aspect of the present invention, it is possible to obtain a mixed refrigerant charging method which can shorten the inspection time and can be charged easily.

According to the tenth aspect of the present invention, it is possible to obtain a mixed refrigerant charging method which can shorten the inspection time and can easily confirm a leak check.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a mixed refrigerant filling device according to a first embodiment.

FIG. 2 is a configuration diagram of an apparatus for manufacturing a refrigerating and air-conditioning apparatus using a mixed refrigerant according to a second embodiment.

FIG. 3 is a configuration diagram of an apparatus for manufacturing a refrigerating and air-conditioning apparatus using a mixed refrigerant according to a third embodiment.

FIG. 4 is a configuration diagram of an apparatus for manufacturing a refrigerating and air-conditioning apparatus using a mixed refrigerant according to a fourth embodiment.

FIG. 5 is a configuration diagram of an apparatus for manufacturing a refrigerating and air-conditioning apparatus using a mixed refrigerant according to a fifth embodiment.

FIG. 6 is a configuration diagram of an apparatus for manufacturing a refrigerating and air-conditioning apparatus using a mixed refrigerant according to a sixth embodiment.

FIG. 7 is a configuration diagram of a mixed refrigerant charging device showing a conventional example.

FIG. 8 is a configuration diagram of a mixed refrigerant charging device showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Refrigerating / air-conditioning system, 2 Heat exchanger, 3 Throttling, 4 Compressor, 5 Service valve, 6 Mass flowmeter which measures the filling amount of refrigerant, 7 Switching valve, 8 Storage container filled with HFC-134a refrigerant, 9 HFC-32 and HFC-12
Storage container filled with the mixed refrigerant of 5; 10 conveyor of production line; 11 air conditioner inspection booth; 12
Storage container filled with HFC-125 refrigerant, 13 HF
A storage container filled with a C-143a refrigerant.

Claims (10)

[Claims] 1. A first storage means for storing an azeotropic or pseudo-azeotropic mixed refrigerant for filling a refrigeration cycle having an evaporator, a condenser, and a compressor, and the refrigerant are non-azeotropic. And a second storage means for storing the refrigerant, and the refrigerating cycle is charged with the refrigerant independently of each of these means. 2. The first storage means stores a pseudo-azeotropic mixed refrigerant having a temperature change of about 1 deg at the same pressure in the wet vapor range of the Mollier diagram. The mixed-refrigerant charging device according to. 3. A refrigeration cycle manufacturing process using a mixed refrigerant, wherein a refrigerant which is a component of the mixed refrigerant is used to inspect a refrigerant circuit system, and after the inspection is completed, the remaining refrigerant is filled. Filling method. 4. In a manufacturing process of a refrigeration apparatus using a mixed refrigerant, a refrigerant circuit system is inspected using an azeotropic or pseudo-azeotropic mixed refrigerant which is a component of the mixed refrigerant, and after the inspection,
A method for charging a mixed refrigerant, which comprises charging the remaining refrigerant. 5. A refrigeration cycle having an evaporator / condenser / compressor, comprising at least one flammable refrigerant,
A first storage means for storing a mixed refrigerant that is azeotropic or pseudo-azeotropic that is incombustible in a mixed state, and a second storage means that stores a refrigerant that is non-azeotropic with the refrigerant are provided.
A mixed refrigerant charging device, characterized in that the refrigerating device is charged with a refrigerant independently of each of these means. 6. A refrigerating apparatus which comprises at least one combustible refrigerant and which is filled with a mixed refrigerant composed of an azeotropic or pseudo-azeotropic mixed refrigerant which is incombustible in a mixed state and a refrigerant which is non-azeotropic with those refrigerants. A mixed refrigerant characterized by inspecting a refrigerant circuit system using a single non-azeotropic refrigerant with respect to other components contained in the mixed refrigerant to be filled in the manufacturing process, and filling the remaining refrigerant after the inspection is completed. Filling method. 7. A refrigerating apparatus which comprises at least one flammable refrigerant and which is filled with a mixed refrigerant composed of an azeotropic or pseudo-azeotropic mixed refrigerant which is incombustible in a mixed state and a refrigerant which is non-azeotropic with those refrigerants. The refrigerant circuit system is inspected using an azeotropic or pseudo-azeotropic mixed refrigerant containing a flammable refrigerant contained in the mixed refrigerant to be filled in the manufacturing process, and the remaining refrigerant is filled after the inspection is completed. Mixed refrigerant filling method. 8. The mixed refrigerant is HFC-32 / HFC-12.
5 and HFC-134a, the single refrigerant is HFC
The mixed refrigerant charging method according to claim 6, wherein the mixed refrigerant charging method is −134a. 9. The mixed refrigerant is HFC-125 / HFC-1.
34a * HFC-143a is comprised, The mixed-refrigerant charging method of Claim 3 characterized by the above-mentioned. 10. The mixed refrigerant is HFC-32 / HFC-1.
25 and HFC-134a, the azeotropic or pseudo-azeotropic refrigerant is a mixed refrigerant of HFC-32 and HFC-125, and the single refrigerant is HFC-134a. Filling method.