JP2001153473A - Refrigerating plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized inexpensive refrigerating plant which can be operated easily with high efficiency while the state of the unit is controlled in such a way that the energy loss is reduced by reducing the pressure loss of a medium without using any expensive high-accuracy medium control equip ment. SOLUTION: The refrigerating plant is provided with a by-pass flow passage which is branched from a main flow passage in a system composed of a compressor, a condenser, an evaporator, and pipelines connecting them. A pressure reducing means which reduces the pressure of the medium flowing through the by-pass passage and a driving means which drives the medium are installed to the by-pass flow passage and a joining means which joins the medium flowing through the by-pass flow passage to the medium flowing through the main flow passage, a pressure raising means which raises the pressure of the joined medium, and a cooling means which cools the joined medium are installed to the main passage. Since a highly efficient cooling cycle which is reduced in energy loss can be realized by means of the above-mentioned means, the purpose can be accomplished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus used for freezing and refrigeration for air conditioning of buildings and houses, storage and processing of foods, and the like.

[0002]

FIG. 14 is a system diagram of a conventional refrigeration system. In the figure, reference numeral 1 denotes a refrigerating apparatus, which is configured by connecting a compressor 2, a condenser 3, a flow control means 4, and an evaporator 5 in sequence with a pipe 6. The above compressor 2
Compresses and discharges the medium flowing in the pipe. The condenser 3 condenses, that is, liquefies the medium by exchanging heat with the outside air or the like. Generally, the flow rate control means 4 is a capillary tube having a smaller diameter than the pipe 6, or an expansion valve which mainly controls the flow rate by changing the degree of opening of a valve having a conical valve body. The evaporator 5 changes the medium in the pipe into steam by exchanging heat with air, water, or the like.

Next, the operation will be described. FIG. 15 is a pressure-enthalpy diagram showing a state change of a medium flowing in a pipe in a conventional apparatus. A dotted line 1 in the drawing indicates a saturated liquid line of the medium flowing in the pipe, and a dotted line 2 indicates a saturated vapor line. The medium is in a liquid state on the left side of the saturated liquid line, becomes vapor on the right side of the saturated vapor line, and becomes a wet vapor in which the vapor and the liquid are mixed between the saturated liquid lines. On the other hand, a solid line portion in the figure is a pressure-enthalpy diagram showing a state change of the medium, a solid line is an isenthalpy line passing through the state, and a solid line 'is an isentropy line passing through the state.

FIG. 15 shows the state of the medium discharged from the compressor, and the compressed medium is high-temperature and high-pressure steam. When the vaporized medium passes through the condenser, it exchanges heat with the outside air and condenses, transforming into a high-temperature, high-pressure liquid. Next, the liquid medium is adiabatically expanded by the flow rate control means 4 to become low-temperature and low-pressure wet steam. Further, it passes through the evaporator 5 and exchanges heat with air or water to evaporate, and changes into low-temperature and low-pressure steam. The medium that has become low-temperature and low-pressure steam is sent to the compressor 2 again, and the refrigeration cycle of high-temperature and high-pressure steam is repeated.

[0005] If the pressure can be reduced by an isentropic change, which is an ideal state change, the medium that has been changed to a high-temperature and high-pressure liquid in the condenser changes to a low-temperature and low-pressure wet steam without increasing entropy. . In this case, the cooling capacity of the device is the enthalpy difference between the state and the state ', and is larger than the cooling capacity in the above-mentioned isenthalpy change.

However, as described above, the flow control means 4 generally employs a capillary tube having a small pipe diameter, an expansion valve controlled by adjusting the opening / closing degree of the valve, and the like. In control using a capillary, the medium that has become a high-temperature, high-pressure liquid is depressurized by the pressure loss when flowing through the capillary, and a portion of the liquid evaporates from the middle of the capillary while increasing in speed, causing a large pressure loss and causing a low pressure and low pressure. Turns into wet steam. Since the pressure loss when flowing at such a high speed is accompanied by an irreversible change, the above-mentioned isenthalpy change in which a part of the energy of the medium is lost. Also, in the case of a refrigeration system using an expansion valve, a shock wave generated when passing through the valve causes an enthalpy change such as losing a part of the energy of the medium, and the cooling capacity obtained by evaporation of the medium also depends on the state. It is the enthalpy difference in the state.

[0007] For example, for example, the Transactions of the Society of Air Conditioning and Sanitary Engineers No. 70, 1998 are being considered. This is a conventional refrigeration system in which the above-mentioned compressor, condenser and evaporator are installed, which is newly provided with a speed-up nozzle, a low-pressure chamber, a mixing chamber, and an ejector including a diffuser for recovering pressure and a gas-liquid separator. is there. The medium which has become a high-temperature and high-pressure vapor from the condenser is recovered in pressure by the action of the ejector and the gas-liquid separator, and has an ideal isentropic change, and can be operated with a large cooling capacity. However, in this conventional device,
Eventually, the apparatus configuration is equipped with a gas-liquid separator and new equipment, and there are problems such as an increase in size, an increase in cost, and a need for precise flow control.

[0008]

SUMMARY OF THE INVENTION In a conventional refrigeration system,
When the flow rate of the high-temperature, high-pressure refrigerant flowing out of the condenser is controlled by a valve or the like, a pressure loss occurs, or the pressure is reduced by the generation of a shock wave. There is a problem that the cooling efficiency of the entire apparatus is extremely deteriorated. Also, for this improvement,
Conventionally, a gas-liquid separator or the like has been used. However, this has a problem in that the cost is increased and high-precision flow control is required.

SUMMARY OF THE INVENTION The present invention has been made in order to solve these conventional problems, and it is possible to reduce the pressure loss of a medium without using a high-cost and high-precision medium control device, and to obtain an inexpensive, easily and highly efficient medium. An object of the present invention is to provide a refrigeration apparatus that can be operated in a cooling cycle.

[0010]

According to the present invention, there is provided a refrigeration apparatus according to the first configuration, which comprises a compressor, a condenser, an evaporator, and a pipe for sequentially connecting these components.
A bypass flow path that branches the flow path of the medium out of the condenser from the main flow path is provided; the bypass flow path is provided with a decompression unit that depressurizes the medium in the bypass flow path and a driving unit that drives the medium; The main flow path is provided with a merging means for merging the medium in the main flow path and the medium in the bypass flow path, a pressure increasing means for increasing the pressure of the medium in the main flow path after the merging, and a cooling means for cooling the medium in the main flow path. Things.

A refrigeration apparatus according to a second configuration of the present invention is the refrigeration apparatus according to the first configuration, wherein the heat exchanger that exchanges heat with the medium in the bypass flow path is used as cooling means for cooling the medium in the main flow path. Is installed.

According to a third aspect of the present invention, in the refrigerating apparatus according to the first aspect, the cooling means for cooling the medium in the main flow path is located at a position lower than the installation positions of the driving means, the merging means and the pressure increasing means. It is installed on the upstream side.

According to a fourth aspect of the present invention, in the refrigeration apparatus according to the first aspect, the cooling means for cooling the medium in the main flow path is located at a position lower than the installation positions of the driving means, the merging means and the pressure increasing means. It is installed on the downstream side.

According to a fifth aspect of the present invention, there is provided a refrigeration apparatus according to the first aspect, wherein a second evaporator for performing heat exchange with outside air is provided in the bypass flow path as cooling means. After exchanging heat with the outside air, the medium is merged with the medium in the main flow path.

A refrigeration apparatus according to a sixth aspect of the present invention is the refrigeration apparatus according to the first aspect, wherein the driving means and the confluence means comprise a structure having a confluence for a medium from a bottleneck and a bypass. It was done.

A refrigeration apparatus according to a seventh aspect of the present invention is the refrigeration apparatus according to the first aspect, further comprising means for measuring a temperature and a pressure of the medium in the pipe, and using a control parameter of the medium based on the measured value. A certain degree of supercooling, saturation temperature,
Alternatively, a supercooling degree calculating means, a saturation temperature calculating means, or a superheating degree calculating means for calculating the degree of superheating is provided, and the pressure reducing means, the driving means, the merging means, the pressure increasing means, or the compressor are controlled in accordance with the control parameters. Things.

A refrigeration apparatus according to an eighth aspect of the present invention is provided with a compressor, a condenser, an evaporator and a pipe for sequentially connecting the compressor and the evaporator, and the operation of the condenser and the evaporator is switched by a flow path switching valve. A medium control device including the bypass flow path, the pressure reducing means, the driving means, the merging means, and the pressure increasing means is provided in a flow path provided between the condenser and the evaporator.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, Embodiment 1 of a refrigeration apparatus according to the present invention will be described. FIG.
1 shows a system diagram of a refrigeration apparatus according to Embodiment 1. FIG. In the figure, reference numeral 1 denotes a refrigeration apparatus according to the present invention;
Is a compressor that compresses and discharges a medium flowing in a pipe, a condenser 3 condenses and liquefies a medium in a vapor state by exchanging heat with the outside air, and a heat exchanger 5 exchanges heat with air or water. This is an evaporator that changes the medium into steam, and is sequentially connected by a pipe 6.
Further, as shown in the figure, a medium control device 500 according to the present invention is connected and installed between the condenser 3 and the evaporator 5 by a pipe 6. The medium control device 500 includes:
For controlling the flow rate, pressure, temperature or state of the medium flowing out of the condenser 3, the apparatus 500 includes a bypass flow path 302 branched from a main flow path 301 of the medium discharged from the condenser 3. is set up. The bypass passage 302 is provided with a decompression unit 303 for reducing the pressure of the medium flowing through the bypass passage 302 and a driving unit 201 for driving the medium in the bypass passage 302. In the main flow path 301, a confluent means 202 for converging a medium flowing in the bypass flow path 302 and a medium flowing in the main flow path 301, and a pressure increasing means 203 for pressurizing the medium in the main flow path after merging are provided. A provided medium control means 200 and a cooling means 304 for cooling the medium flowing through the main flow path 301 are provided.

Next, the operation of the refrigeration apparatus according to this embodiment will be described. FIG. 2 is a pressure-enthalpy diagram showing the operation of the refrigeration apparatus of the present invention. As shown in FIG. 2, the medium compressed by the compressor 2 becomes high-temperature and high-pressure steam, and then condenses by exchanging heat with air in the condenser 3.
It changes to liquid while maintaining pressure. The liquefied medium flows through the main flow path 301 and the bypass flow path 302 branched from the main flow path 301. Part of the medium flowing through the bypass channel 302 is
Adiabatic expansion when passing through, the pressure is reduced to change into low-temperature and low-pressure wet steam ', and then the cooling means 304 exchanges heat with the medium flowing out of the medium control means 200 through the main flow path 301 and is heated. Turns into 'superheated steam'. The medium in the bypass passage that has passed through the cooling unit 304 is driven by the driving unit 201 provided in the bypass passage, and is drawn into the medium control unit 200 to be in the state ′. On the other hand, the remaining medium flowing from the condenser 3 toward the main flow path 301 is
The medium is supplied to the medium control means 200, and the pressure is reduced in a state close to the isentropic change while increasing the speed in the medium control means 200 to change to a wet steam state. The medium flowing through the main flow path merges with the medium ′ of the bypass flow path drawn into the medium control means 200 from the bypass flow path at the merging means 202, and becomes a state. The pressure is increased in a state close to the isentropic change and changes to a state. The pressure-recovered medium is then supplied to the cooling means 3
In 04, the heat exchange with the medium flowing in the bypass flow path is performed, and the medium is cooled and exchanged with air and water in the evaporator 5 to change to a low-temperature and low-pressure vapor state and then sent to the compressor 2 again. . Thus, the above cooling cycle is repeated.

As described above, according to the first embodiment of the present invention, by providing the medium control device 500,
It is possible to easily realize a cooling cycle in which the medium flowing in the main flow path performs almost ideal energy conversion with little pressure loss as in the state. Therefore, the cooling capacity of the device is improved, and high-efficiency operation with less energy loss is possible.

Embodiment 2 FIG. Next, a refrigeration apparatus according to Embodiment 2 of the present invention will be described. The present invention is a refrigerating apparatus using a heat exchanger for exchanging heat with a medium in a bypass flow path as a cooling unit 304 for cooling a medium flowing in a main flow path in the system diagram shown in FIG. By providing the heat exchanger as the cooling means in this way, it is possible to easily realize a cooling cycle for performing almost ideal energy conversion as in the first embodiment.

Embodiment 3 FIG. Next, a refrigeration apparatus according to Embodiment 3 of the present invention will be described. FIG. 3 is a system diagram of an apparatus according to Embodiment 3 of the present invention. In FIG. 3, reference numeral 32 denotes a heat exchanger for cooling the medium in the main flow passage, which is installed upstream of the installation position of the medium control means 200 in which the driving means, the merging means and the pressure increasing means are installed. Reference numeral 31 denotes a flow control valve as a means for reducing the pressure of the medium flowing through the bypass flow passage.
To the heat exchanger 32 and the medium control means 200 sequentially.

Next, the operation of the refrigeration apparatus according to this embodiment will be described. FIG. 4 is a pressure-enthalpy diagram showing the operation of the refrigeration apparatus of the present invention. As shown in FIG. 4, the medium compressed by the compressor 2 becomes high-temperature and high-pressure vapor, which is condensed by exchanging heat with the air in the condenser 3 and changes into a high-temperature and high-pressure liquid '. This liquefied medium ′ flows separately into the main flow path 301 and a bypass flow path 302 branched from the main flow path 301. A part of the medium ′ flowing through the bypass flow path 302 is adiabatically expanded in the flow rate control valve 31 which is a pressure reducing means, is depressurized and changes to a low-temperature low-pressure wet steam state ′. Heat exchange with the flowing medium, and is heated to change to a superheated steam state. The medium in the bypass passage passing through the heat exchanger 32 is drawn into the medium control means 200 to be in the state '. On the other hand, the main flow path 301 from the condenser 3
The remaining medium ′ flowing to the side is cooled by the heat exchanger 32 and becomes a state. Thereafter, the medium is supplied to the medium control means 200, in which the pressure is reduced in a state close to the isentropic change, and the medium changes to a wet vapor state. The medium flowing in the main flow path merges with the medium ′ of the bypass flow path drawn into the medium control means 200 from the bypass flow path, enters a state, and is further pressurized in a state close to an isentropic change. Change. Thereafter, the medium exchanges heat with air, water, or the like in the evaporator 5 to change to a low-temperature low-pressure steam state, and is then sent to the compressor 2 again to become high-temperature high-pressure steam, and the above-described cooling cycle is repeated.

Even when the cooling means is installed on the upstream side of the driving means, the merging means and the pressure increasing means, the pressure of the medium in the bypass passage, that is, the temperature, is lower than the temperature of the medium in the main passage. Since the degree of supercooling of the medium can be increased by installing the heat exchanger 32, high-efficiency operation with low energy loss and high cooling capacity is also possible.

Embodiment 4 Next, a fourth embodiment of the present invention will be described. FIG. 5 is a system diagram showing a refrigeration apparatus according to Embodiment 4 of the present invention. In the figure, reference numeral 18 denotes a heat exchanger provided in a bypass flow path as a cooling means, and is provided downstream of the ejector 10 which is a driving means, a merging means, and a pressure increasing means. 17 is a flow control valve, and 16 is a bypass pipe. Also, the ejector 10
Numeral denotes an ejector having the same function as that of the medium control means 200 described above. The ejector has a nozzle 12 for accelerating the flow rate of the medium in the main flow path, a low-pressure chamber 13 for driving and drawing the medium in the bypass flow path, and a main flow path. It is composed of a merging chamber 14 for joining the medium in the passage and the medium in the bypass passage, and a diffuser 15 for increasing the pressure in the medium in the main passage.

As described above, the heat exchanger 18 is installed in the bypass flow path downstream of the installation positions of the driving means, the merging means, and the pressure increasing means, and the medium in the main flow path flowing out of the ejector, which is the medium control means. Can be controlled to an ideal isentropic change. Therefore, high-efficiency operation with a high cooling capacity is also possible.

Embodiment 5 FIG. Next, a refrigeration apparatus according to Embodiment 5 of the present invention will be described. FIG. 6 shows a system diagram of the cooling device of the present invention. In the figure, reference numeral 36 denotes a second evaporator provided in the bypass flow path, which exchanges heat between water or air cooled by the evaporator 5 and a medium flowing out of the bypass flow path to vaporize. In this way, the second evaporator is installed in the bypass flow path, the medium is vaporized by performing heat exchange, and then the medium is merged with the medium in the main flow path. Control. Therefore, operation with high cooling efficiency becomes possible.

Embodiment 6 FIG. 7, 8, and 9 show:
FIG. 16 is an enlarged view of a medium control unit of a refrigeration apparatus according to Embodiment 6 of the present invention. The apparatus shown in FIG.
At 00, a tapered divergent nozzle provided with a converging port 305 for merging the medium from the bypass flow path is used, and is installed in the main flow path 301. FIG. 8 shows a configuration in which an orifice having a narrow path for narrowing the flow path of the medium flowing inside is used as the medium control means 200, and the medium control means 200 is provided with a merge port 305 for merging the medium from the bypass flow path. FIG. 9 shows an example in which an expansion valve is used for the medium control means 200, 41 is a casing, 42 is a valve body, 43 is a valve seat, 44 is a valve driving device for driving the valve body 42, and 45 is a valve driving device. An inflow pipe for allowing the medium from the main flow path to flow into the expansion valve, 5
Reference numeral 0 denotes a tapered outflow pipe for allowing the medium in the main flow path to flow out of the expansion valve, and reference numeral 305 denotes a junction for merging the medium from the bypass flow path. The expansion valve includes a valve element 42.
The flow rate of the medium is controlled by adjusting the area of the gap between the valve seat 43 and the valve driving device 44.

As described above, the driving means for driving the medium in the bypass flow path and the joining means for joining the medium in the bypass flow path and the medium in the main flow path reduce at least the cross-sectional area of the flow path through which the medium flows. By providing a structure having a narrowed narrow passage and a junction of the medium from the bypass, ideal state control with small energy loss of the medium can be performed, and efficient operation can be performed.

Embodiment 7 FIG. 10 is a system diagram of a refrigeration apparatus according to Embodiment 7 of the present invention. In FIG. 10, reference numeral 100 denotes a temperature measuring device for measuring the temperature of a medium;
Is a pressure measuring device for measuring the pressure of the medium,
It is installed in the main flow path 301 between the media control device 200 and the medium control device 200. Also, reference numeral 102 denotes a saturation temperature calculating means, and 103 denotes a supercooling degree calculating means, which sends a signal to a depressurizing means 303 provided in the bypass flow path in accordance with the calculated supercooling degree to thereby adjust the flow rate of the medium in the bypass flow path. Controlling. FIG. 11 is a system diagram of a similar refrigeration apparatus according to Embodiment 7 of the present invention, and includes a saturation temperature calculating means 102 based on a medium temperature and a pressure measured by a temperature measuring device 100 and a pressure measuring device 101.
A signal is sent to the valve drive device 44 of the expansion valve according to the degree of supercooling calculated by the degree of supercooling calculation means 103 to control the flow rate of the medium in the main flow path.

With the configuration as in the seventh embodiment, the medium can be controlled to an ideal state with little energy loss. In the above embodiment, the case where the degree of supercooling is calculated and controlled is described. However, the temperature measuring device and the pressure measuring device are installed between the evaporator and the compressor, and the degree of superheating of the medium before entering the compressor. May be calculated to control the pressure reducing means or the medium control means. Further, the degree of superheat may be calculated by measuring the temperature and pressure of the medium in the bypass pipe from the heat exchanger to the medium control means, and the pressure reducing means or the medium control means may be controlled in accordance with the degree of superheat. Further, the same effect can be obtained by transmitting the control parameter signal to the compressor for control.

Embodiment 8 FIG. FIG. 12 shows a system diagram of a refrigeration apparatus according to the eighth embodiment. Refrigeration apparatus 1 shown in FIG.
The compressor includes a compressor 2, a condenser 3, an evaporator 5, and a pipe 6 for sequentially connecting the compressor 2, the condenser 3 and the evaporator 5, the operation of which is switched by a flow path switching valve 400. In the flow path provided between the vessel 3 and the evaporator 5, the medium control device 500 including the bypass flow path, the pressure reducing means, the driving means, the merging means, and the pressure increasing means described in the first embodiment is provided. It was installed.

Next, the operation of the refrigeration apparatus according to Embodiment 8 will be described. As shown in FIG. 12, the medium that has been compressed by the compressor 2 to become a high-temperature and high-pressure vapor flows into the condenser 3 through one of the flow path switching valves 400, where it is condensed and converted into a liquid. I do. The medium discharged from the condenser 3 is
The medium control device 500 installed in the flow path between the condenser 3 and the evaporator 5 through the other flow path switching valve 400
Flows into. The medium that has flowed into the medium control device 500 is controlled to a state in which energy loss is small as described above, changes to a low-temperature, low-pressure, wet steam state, and is sent to the evaporator 5 where the medium flows. It exchanges heat with the outside air and water to change to low-temperature, low-pressure steam. Thereafter, the air is sent to the compressor 2 again through the flow path switching valve 400, and the same cycle is repeated. When the condenser 3 is placed outside the room and the evaporator 5 is placed inside the room to perform the cooling operation, as described above,
The medium can efficiently cool the indoor air by the evaporator 5. On the other hand, when performing the heating operation with the above-described device, the flow path is switched by the flow path switching valve 400, the medium flowing out of the compressor 2 flows into the evaporator 5, and the medium flowing out of the evaporator 5 is One of the flow path switching valves 400 is switched so as to flow to the medium control device 500, and the medium exiting from the medium control device 500 is transmitted to the medium control device 500.
An efficient heating operation can be performed by switching the flow path switching valve 400 installed on the downstream side of the condenser 3 and sending it to the condenser 3. According to the above-described device, the cooling / heating operation can be performed without changing the direction of the flow of the medium flowing in the pipe by simply switching the flow path switching valve.

FIG. 13 is a system diagram of an apparatus according to the eighth embodiment, in which a four-way valve is used as the flow path switching valve 400. In the figure, (a) shows a cooling operation, and (b) shows a heating operation. The device shown in FIG. 13 operates in the same manner as the device shown in FIG. 12 by switching the four-way valve, and can also easily and efficiently operate.

As described above, according to the configuration of the present invention, efficient operation with little energy loss can be performed, and expensive auxiliary equipment and repair of switching are not required.
Since a single system can function as a pair of an evaporator and a condenser, a refrigeration apparatus that is small, lightweight, inexpensive, and can switch between cooling and heating can be realized. In the above example, the condenser 3
The case where the evaporator 5 is installed one by one has been described. However, the same effect can be obtained when a plurality of evaporators 5 are installed outdoors or indoors.

[0036]

The refrigerating apparatus according to the present invention is constructed as described above, and in any case, without using expensive and high-precision equipment, the refrigerating apparatus can be replaced by a conventional condenser. The pressure loss of the medium flowing out can be reduced, and the cooling capacity and cooling efficiency can be improved. Therefore, according to the configuration of the present invention, it is possible to easily perform a cycle operation with high cooling efficiency and high cooling efficiency,
A compact, lightweight, inexpensive and high-performance refrigeration apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is an example showing Embodiments 1 and 2 of the present invention,
FIG.

FIG. 2 is a pressure-enthalpy diagram showing the operation of the refrigeration apparatus of the present invention.

FIG. 3 is an example showing a third embodiment of the present invention, and is a system diagram of a refrigeration apparatus.

FIG. 4 is a pressure-enthalpy diagram showing the operation of the refrigeration apparatus of the present invention.

FIG. 5 is a diagram illustrating a refrigeration apparatus according to a fourth embodiment of the present invention.

FIG. 6 is a diagram illustrating a refrigeration apparatus according to a fifth embodiment of the present invention.

FIG. 7 is an enlarged view of a medium control unit in an example showing the sixth embodiment of the present invention.

FIG. 8 is an enlarged view of a medium control unit in an example showing the sixth embodiment of the present invention.

FIG. 9 is an example showing the sixth embodiment of the present invention, and is an enlarged view of a medium control unit.

FIG. 10 is a system diagram of a refrigeration apparatus according to a seventh embodiment of the present invention.

FIG. 11 is an example showing a seventh embodiment of the present invention and is a system diagram of a refrigeration apparatus.

FIG. 12 is a system diagram of a refrigeration apparatus according to an eighth embodiment of the present invention.

FIG. 13 is a system diagram of a refrigeration apparatus according to an eighth embodiment of the present invention.

FIG. 14 is a system diagram showing a conventional refrigeration apparatus.

FIG. 15 is a pressure-enthalpy diagram showing the operation of a conventional refrigeration system.

[Explanation of symbols]

1. Refrigeration equipment, 2. Compressor, 3. Condenser 4. 4. flow control means; Evaporator, 6. Piping 7. Gas-liquid separator, 10; Ejector, 11. Casing 12. Nozzle, 13. 13. low pressure chamber; Merging room 15. Diffuser, 16. Bypass piping, 1
7. Flow control valve, 18. Heat exchanger, 33.
Supercool measurement means 36. Second evaporator, 41. Casing, 42.
Valve body, 43. Valve seat, 44. Valve drive, 4
5. Inflow pipe, 50. 100. tapered outlet pipe;
Temperature measuring device, 101. Pressure measuring device, 102.
Means for calculating a saturation temperature, 103. Supercooling degree calculating means, 2
00. Medium control means, 201. Driving means, 202.
Merging means, 203. Boosting means, 301. Main flow path, 302. Bypass channel, 303. Decompression means,
304. Cooling means, 305. Junction, 400.
Flow path switching valve, 500. Medium control device

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroyuki Morimoto 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 3L092 AA01 AA02 BA05 BA18 BA23 BA26 DA14 EA02 FA01 FA21 FA26

Claims (8)

[Claims] 1. A compressor having a compressor, a condenser, an evaporator, and a pipe for sequentially connecting the compressor, a condenser, a evaporator, and a piping that sequentially connects the compressor, a condenser, an evaporator, and a pipe.
The bypass flow path is provided with a decompression means for depressurizing the medium in the bypass flow path, and a driving means for driving the medium in the bypass flow path. The medium in the bypass flow path and the medium in the main flow path are provided in the main flow path. A refrigerating apparatus provided with a confluent means for converging the medium, a pressure increasing means for increasing the pressure of the medium in the main flow path after the confluence, and a cooling means for cooling the medium in the main flow path. 2. The refrigeration apparatus according to claim 1, wherein a heat exchanger for exchanging heat with the medium in the bypass flow path is provided as cooling means for cooling the medium in the main flow path. 3. The refrigerating apparatus according to claim 1, wherein said cooling means is provided on an upstream side of an installation position of said driving means, merging means and pressure increasing means. 4. The refrigeration apparatus according to claim 1, wherein said cooling means is provided downstream of the installation positions of said driving means, merging means and pressure increasing means. 5. A cooling device, wherein a second evaporator for exchanging heat with the outside air is provided in the bypass flow path, and the medium in the bypass flow path exchanges heat with the outside air and then merges with the medium in the main flow path. 2. The refrigeration apparatus according to claim 1, wherein: 6. The refrigerating apparatus according to claim 1, wherein the driving means and the merging means have a structure having a confluence of a medium from a bottleneck and a bypass. 7. The refrigeration apparatus according to claim 1, further comprising means for measuring a temperature and a pressure of the medium in the pipe, and a supercooling degree, a saturation temperature, or an overheating which is a control parameter of the medium from the measured values. Provide supercooling degree calculating means for calculating the degree, saturation temperature calculating means, or superheating degree calculating means,
A refrigeration apparatus characterized by controlling the pressure reducing means, the driving means, the merging means, the pressure increasing means, or the compressor according to the control parameters. 8. A compressor having a compressor, a condenser, an evaporator, and a pipe for sequentially connecting the compressor and the evaporator, wherein the mutual function and operation of the condenser and the evaporator are switched by a flow path switching valve. The flow path provided between the evaporators, the bypass flow path according to claim 1, a depressurizing means for depressurizing the medium of the bypass flow path, a cooling means for cooling the medium of the main flow path, the medium of the bypass flow path. Driving means for driving,
A refrigerating apparatus provided with a medium control device including a joining unit that joins a medium in a bypass passage and a medium in a main passage and a pressure increasing unit that pressurizes the medium in the main passage after the joining.