JP2518776B2 - Refrigerator circuit using expansion ejector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is used for various refrigeration equipment, are those related to the refrigerator circuits using expansion ejector.

[0002]

2. Description of the Related Art Conventionally, activated carbon is generally used when recovering organic solvent gas, halogen-based organic solvent gas such as halon gas, CFC gas, or hydrocarbon compound-based gas and other various gases from the air.

[0003]

However, when the above activated carbon is used, the following problems occur. For example, when recovering CFC R113 which evaporates as a gas from a cleaning tank using CFC R113 as a cleaning liquid,
Animal fat, surfactant, flux for soldering, grease, etc., which are brought from the hands of workers, are mixed in the gas, and these are adsorbed on the activated carbon along with the above-mentioned CFC R113, and fine particles of the activated carbon If they enter the holes, they will be clogged, reducing their adsorption ability and shortening their service life. In addition, adsorption and desorption of activated carbon is also troublesome because it is performed by changing the temperature.

Regarding the liquefaction and recovery of the gas, in addition to the method using activated carbon as described above, a method of cooling the gas to liquefy it and recovering it is also used. It must be cooled to about -50 to -80 ° C, and can be cooled only to about -35 ° C in a normal refrigerator circuit, which makes the cooling device large and complicated and therefore expensive. It is inevitable that it will become a thing.

The present invention has been made to solve the above problems, and an object thereof is to solve all of the above-mentioned various problems caused by using activated carbon, that is, use activated carbon. In addition, it is possible to obtain a cryogenic temperature at which gas can be liquefied and recovered, or a cryogenic temperature close to cryogenic temperature, with a simple structure, and an inexpensive refrigerator with excellent performance, that is, expansion. Refrigerator cycle using ejector
Is to provide a path .

[0006]

The present invention which achieves the above-mentioned object is described as follows. A first compressor and a first expansion valve or a capillary are communicated with each other through a first condenser, and the first expansion is performed. A valve or a capillary tube communicates with the first compressor via a first evaporator to form a first refrigerator circuit, and separately, a second compressor communicates with a heat exchange section via a second condenser. The heat exchange section is connected to a liquid receiver via an expansion ejector, the liquid receiver is connected to the second compressor, and the liquid receiver is connected via a second expansion valve or a capillary tube to the first expansion valve. A refrigerator circuit using an expansion ejector, characterized in that the expansion ejector is connected to the second evaporator, the second evaporator is connected to the expansion ejector, and a heat exchanger is formed by making the heat exchange section correspond to the evaporator. Is.

Further, the first compressor and the first expansion valve or the capillary tube are communicated with each other via the first condenser, and the first expansion valve or the capillary tube is connected to the first compressor via the first evaporator. To form a first refrigerating circuit, and to separately communicate a second compressor and a heat exchange section via a second compressor, and to connect the heat exchange section and the second evaporator to a second expansion valve. Alternatively, they are communicated via a capillary tube, the second evaporator is communicated with the second compressor to form a second refrigerator circuit, and the heat exchange section of the second refrigerator circuit is made to correspond to the evaporator. To form a heat exchanger, and separately, the third compressor and the second heat exchange section are communicated with each other through the third condenser, and the heat exchange section and the liquid receiver are communicated with each other through an expansion ejector, and A liquid receiver is connected to the third compressor, and the liquid receiver is connected to a third evaporator via a third expansion valve or a capillary, and the third evaporator is connected to the third evaporator. Communicated to Zhang ejector, a refrigerator circuit using an expansion ejector, characterized in that said second heat exchanger to form a second heat exchanger so as to correspond to the second evaporator.

Further, the compressor and the liquid receiver are communicated with each other through a condenser, the liquid receiver and the evaporator are communicated with each other through an expansion valve or a capillary tube, and the evaporator is communicated with the compressor. To form a refrigerator circuit, the liquid receiver and another liquid receiver are communicated with each other via a heat exchange unit, and the heat exchange unit and the evaporation unit are made to correspond to each other to form a heat exchanger. The other receiver to communicate with another evaporator via another expansion valve or capillary tube, the other evaporator to communicate with the evaporator, and the other heat exchange to communicate with the other receiver. A portion corresponding to the other evaporator to form a heat exchanger, the further heat exchange portion is communicated with a further liquid receiver via an expansion ejector, and the further liquid receiver is An expansion ejector characterized in that the expansion valve or the capillary is communicated with another evaporator, and the expansion valve or the capillary is communicated with the ejector through another evaporator. A refrigerator circuit using the data.

[0109]

First, the refrigerator circuit using the expansion ejector will be described. The refrigerant compressed in the compressor becomes high temperature and high pressure and is sent to the condenser, in which the refrigerant vapor is cooled from the outside and radiates heat. Liquefy. The liquefied refrigerant liquid is expanded and jetted at high speed in the expansion ejector due to the high pressure, and is stored in the liquid receiver. Then, the gas in the liquid receiver reaches the compressor and is compressed, and the refrigerant liquid is expanded through the expansion valve or the capillary to enter the evaporator and absorbs heat to exhibit a refrigerating effect.

The evaporator is communicated with the expansion ejector as described above, and the expansion injection of the refrigerant liquid in the expansion ejector causes the suction portion communicating with the evaporator to have a low pressure, so that the evaporator also has a low pressure. Therefore, due to the temperature drop due to the low pressure added to the temperature drop as the evaporator, the temperature is lowered to about -80 ° C as an example.

In general, a conventional refrigerator comprising a compressor, a condenser, an expansion valve or a capillary tube, and an evaporator can usually be cooled only to about -35 ° C. However, according to the above apparatus of the present invention,
In spite of the fact that the above-mentioned conventional device is provided with an expansion ejector, it is possible to provide a cryogenic temperature as described above or a temperature very close to it, although it has a very simple structure.

As described above, the cooling member of the recovery device can be cooled to a cryogenic temperature or a low temperature close thereto by using a very simple and thus compact device.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is a compressor and 2 is a condenser. 3 is a communication pipe. Next, 4 is an expansion ejector, a nozzle 5 as shown in FIG. 2 is communicated with the condenser 2, and the liquefied refrigerant 6 pressurized from the nozzle 5 is ejected in the direction of arrow A6. In FIG. 1, reference numeral 7 indicates a liquid receiver. The liquefied refrigerant 6 in the liquid receiver 7 is partially gasified in the liquid receiver 7, and the refrigerant gas reaches the compressor 1 and is compressed.

On the other hand, the liquefied refrigerant 6 in the liquid receiver 7 reaches the expansion valve or the capillary 8 and is expanded and expanded to enter the evaporator 9 to evaporate and absorb heat to exhibit a cooling effect. Next, in the expansion ejector 4, from the nozzle 5 as described above,
The liquefied refrigerant 6 is ejected, which increases the flow velocity at the tip portion 10 of the nozzle 5 and thus causes a low pressure, so that the vaporized refrigerant of the evaporator 9 is sucked from its suction portion 11 and the nozzle 5 The liquid is urged by the liquefied refrigerant 6 ejected from the liquefied refrigerant 6, fed into the liquid receiver 7, and sucked by the compressor 1.

For this reason, in the evaporator 9, the gas inside thereof has a low pressure, so that further evaporation is performed, and in addition to the original evaporation action of the evaporator, the evaporation due to the low pressure of the suction of the expansion ejector 4 is added. The cooling effect of the evaporator 9 is further enhanced, and in the evaporator 9 of the present invention, the evaporator of the conventional refrigerator which cools only to about −35 ° C. is cooled to about −80 ° C. You can

In FIG. 1, reference numeral 12 is a heat exchanger,
It is provided so as to straddle between the communication pipe 3 downstream of the liquid receiver 7 and the communication pipe 3 downstream of the evaporator 9, whereby the evaporator 9 is provided.
The incoming refrigerant liquid can be pre-cooled, making the temperature drop in the evaporator 9 more effective.

By separating the liquid and the gas in the liquid receiver 7 and supplying the gas out of the liquid to the compressor 1, the compression ratio in the compressor 1 becomes small due to the pressure of the gas, and The load on the compressor 1 can be reduced accordingly. In FIG. 1, 13 indicates a cooling device. Reference numeral 14 is a refrigerator circuit formed as described above.

Next, the refrigerant used in the apparatus of the present invention will be described. Methane CH ₄ , ethane C ₂ H _{6 and the} like in which hydrogen is replaced by fluorine or chlorine, for example, CCl ₂ F ₂ (R- 12), CCl ₃ F (R-1
1), CHClF ₂ (R-22) and the like, but other appropriate materials such as ammonia and carbon dioxide may be used, and air,
It can be used with anything other than hydrogen and helium.

Next, FIG. 3 shows another embodiment of the present invention, in which 17 is a first compressor, 18 is a first condenser, 19 is a first expansion valve or capillary tube, and 20 is a first expansion valve or capillary tube. The first evaporator is shown. 21 is the first refrigerator circuit thus formed. 22 is a second compressor, 23 is a second condenser, 24
Is a heat exchange section, 4 is an expansion ejector, and 7 is the liquid receiver. Further, 25 is a second expansion valve or capillary tube, and 26 is a second evaporator. 27 shows the second refrigerator circuit thus formed.

The heat exchange section 24 is connected to the evaporator 20.
The heat exchanger 28 is formed in correspondence with the above.
Reference numeral 29 denotes the refrigerator circuit thus formed. And the refrigerator circuit 2 using the expansion ejector formed in this way
9 is that the second evaporator 26 is further cooled by the ejector 4 and the heat exchanger 28 is provided, so that the pressurized solvent supplied to the ejector 4 is the same heat exchanger. Since it is cooled by 28, a low temperature of −100 ° C. was obtained in the second evaporator 26 as an example.

Next, FIG. 4 shows still another embodiment of the present invention. In FIG. 4, the same reference numerals as those shown in FIG. 3 have the same names as those of FIG. It shall be. Reference numeral 31 is a third compressor, 32 is a third condenser, 33 is a second heat exchange section, 34 is a third expansion valve or capillary tube, and 35 is a third evaporator.

Reference numeral 36 is a second heat exchanger formed by the second evaporator 26 and the second heat exchange section 33. And 3
7 shows the refrigerator circuit thus formed. In the refrigerator circuit 37 formed in this way, the third evaporator 35 exhibits a low temperature as a normal evaporator, but the expansion ejector 4 causes a pressure drop, and the temperature is further lowered. In addition, the pressurized solvent ejected to the expansion ejector 4 is also cooled by the heat exchanger 28 and the second heat exchanger 36. Therefore, as an example, −110 ° C. was obtained.

It will thus be appreciated that cryogenic temperatures can be achieved with the relatively simple construction of the device shown in FIGS. Next, FIG. 5 shows still another embodiment of the present invention, in which 39 is a compressor, 40 is a condenser,
41 is a liquid receiver, 42 is an expansion valve or a capillary, 43 is an evaporator, 44 is a heat exchange part, 45 is an evaporator 43 and a heat exchange part 44
Is a heat exchanger formed by.

As shown in the figure, a plurality of the same devices except the compressor 39 and the condenser 40 are connected in series, and the ejector 46, the liquid receiver 47, and the expansion valve 4 are connected to the ends thereof.
8, a refrigerator circuit 50 consisting of an evaporator 49 is shown. In the refrigerator circuit formed in this way, as an example,
A low temperature of 140 ° C was obtained. Next, FIG. 5 shows a gas recovery device using the above-described refrigerator circuit using the expansion ejector of the present invention, and many parts of the drawing are the same as those in FIG. The same reference numerals as those shown in the drawings have the same names as those in FIG. 1 and have the same functions.

In the figure, reference numeral 52 is a gas collector, and a cooling coil is provided as a cooling member 54 in the up and down direction inside a casing 53 formed in a closed container shape. Is communicated with the evaporator 9 of the refrigerator circuit of the present invention. Also in the figure 55
Is a recovery gas supply port, and 56 is a clean gas discharge port,
Reference numeral 57 indicates a suction device such as a fan or a blower. Reference numeral 58 is a bottom portion, 59 is a recovery passageway, 60 is a recovery container, and 61 is a support base.

To explain the operation of this device, the cooling member 54 of the recovery unit 52 has a temperature of approximately -80 ° C. due to the circulation of the cooled refrigerant from the refrigerator circuit 13. Then, the recovered gas, in this case, for example, halon 113 gas, is supplied into the recoverer 52 from the supply port 55 together with air. Then the same halon 113
The refrigerant gas compressed by the compressor 1 is liquefied by the condenser 2 and expanded and ejected by the expansion ejector 4,
It is stored in the liquid receiver 7, and the gas component of the liquid reaches the compressor 1 and is compressed.

The refrigerant liquid 6 in the liquid receiver 7 passes through an expansion valve or a capillary tube 8 to be vaporized and vaporized in an evaporator 9 to cool it. In this case, the expansion ejector 4 is decompressed, so that the evaporator 9 is decompressed, whereby the evaporator 9 further lowers in temperature to about -80 ° C. Then, the evaporator 9 cools the cooling member 54 of the gas recovery device 52 which is communicated with the evaporator 9, and the temperature is set to −80 ° C. as an example.

The suction device 57 of the gas recovery machine 52 is operated to suck the target gas, for example, halon 113 gas mixed with air, for example, from the supply port 55. Then, the mixed gas of the halon 113 is moved up in the casing 53, and while being in contact with the cooling member 54, is cooled and liquefied. The halon 113 gas is liquefied well because it liquefies at about -50 ° C.

Then, the inside of the casing 53 is dropped and the bottom portion 5
It is collected in the collection container 60 from the No. 8 through the collection passage 59. As described above, the normally used refrigerator circuit was only able to obtain a low temperature of about −35 ° C., so that the gas could not be liquefied and recovered. Liquefaction and recovery of various gases can be easily performed by a conventional device that is as simple as adding an expansion ejector to an ordinary device. Note that the above-mentioned device is actually provided by connecting a plurality of gas recovery units 52 in series to perform pre-cooling and deep-cooling and complete recovery.

Further, the above-mentioned device may be a stationary device, and it may be movably formed by loading it on a truck or the like. In this case, the compressor 1 may be connected to an external output shaft of the truck or the like, or may be connected to a normal power source. Of course, in that case, the whole is accommodated in a heat-insulating housing (not shown), various openings are provided with valves, and suction hoses and the like are detachably provided.

[0031]

The present invention is constructed as described above, and in the vapor compression refrigerator, an expansion ejector is provided downstream of the condenser, and a liquid receiver is connected to the expansion ejector, and the liquid receiver is connected to the compressor. An expansion valve or a capillary tube is provided downstream of the expansion valve or the communication tube, and an evaporator is provided between the expansion valve or the capillary tube and the expansion ejector. It is possible to greatly increase the refrigerating capacity, and obtain a cryogenic temperature or a low temperature close to it.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a refrigerator circuit using an expansion ejector according to an embodiment of the present invention.

FIG. 2 is a sectional view of an expansion ejector showing an embodiment of the present invention.

FIG. 3 is a view corresponding to FIG. 1, showing another embodiment of the present invention.

FIG. 4 is a view corresponding to FIG. 1 and showing still another embodiment of the present invention.

FIG. 5 is a view corresponding to FIG. 1, showing still another embodiment of the present invention.

FIG. 6 is a view showing an embodiment of the present invention and is a view showing an outline of a gas recovery device using a refrigerator circuit using an expansion ejector.

[Explanation of symbols]

 1 Compressor 2 Condenser 4 Expansion Ejector 7 Liquid Receiver 8 Expansion Valve or Capillary 9 Evaporator 52 Gas Recovery Device 54 Cooling Member 55 Supply Port 56 Discharge Port 60 Recovery Container

Claims (3)

(57) [Claims] 1. A first compressor and a first expansion valve or capillary tube,
The first expansion valve or the capillary tube, which is communicated through the first condenser.
To communicate with the first compressor via a first evaporator.
Forming a refrigerator circuit, and separately, a second compressor and a heat exchange section
Through the second condenser to expand the heat exchange section.
The receiver is connected to the receiver via an ejector, and the receiver is connected to the first receiver.
The second receiver is connected to the second compressor, and the receiver is connected to the second expansion valve or capillary.
The second evaporator is connected to the second evaporator through a pipe,
Communicate with the expansion ejector, and further evaporate the heat exchange section.
A refrigerator circuit using an expansion ejector, characterized in that a heat exchanger is formed corresponding to a container . 2. A first compressor and a first expansion valve or a capillary tube.
Through the first condenser, the first expansion valve or bristles
The thin tube is connected to the first compressor through the first evaporator.
Form a first refrigeration circuit, and a second compressor and heat exchange part separately.
To communicate with each other via the second compressor, and the heat exchange section and the second steam are connected.
The generator is communicated with a second expansion valve or a capillary tube,
A second refrigerator by connecting the second evaporator and the second compressor.
Circuit is formed, and the heat exchange section of the second refrigerator circuit is vaporized
A heat exchanger is formed in correspondence with the compressor, and a third compressor is separately provided.
The second heat exchange section is communicated via the third condenser, and the heat exchange is performed.
And the liquid receiver via the expansion ejector,
The liquid container is connected to the third compressor, and the liquid receiver is connected to the first compressor.
Communicating with a third evaporator through a three expansion valve or a capillary,
The third evaporator is connected to the expansion ejector, and the second heat
Form a second heat exchanger with the exchange part corresponding to the second evaporator.
A refrigerator circuit using an expansion ejector, which is characterized by being made. 3. A compressor and a liquid receiver are connected via a condenser.
The liquid receiver and the evaporator through an expansion valve or a capillary tube.
The evaporator and the compressor to communicate with the compressor.
A circuit is formed and the above receiver and other receivers are connected via a heat exchange unit.
And communicate with each other, and the heat exchange section and the evaporation section are made to correspond to each other to generate heat.
It forms an exchanger, and the other receiver is replaced by another expansion valve or bristles.
Connect it to another evaporator through a thin tube, and
In addition to communicating with the above-mentioned evaporator and communicating with other liquid receivers
The heat exchange unit, a heat exchanger in correspondence with the other evaporator
And further through the expansion ejector the other heat exchange part
The other liquid receiver is communicated with the other liquid receiver, and the other liquid receiver is connected to the other liquid receiver.
Of the expansion valve or capillary tube, and
A refrigerator circuit using an expansion ejector, wherein the refrigerator circuit is communicated with the ejector through the evaporator .