JP4277397B2 - Refrigeration equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigeration apparatus used for freezing and refrigeration for air conditioning of buildings and houses, storage and processing of foods, and the like.
[0002]
[Prior art]
FIG. 14 is a system diagram of a conventional refrigeration apparatus. In the figure, reference numeral 1 denotes a refrigeration apparatus, in which a compressor 2, a condenser 3, a flow rate control means 4, and an evaporator 5 are sequentially connected by a pipe 6. The compressor 2 compresses and discharges the medium flowing in the pipe. The condenser 3 condenses, that is, liquefies the medium by exchanging heat with outside air or the like. As the flow rate control means 4, generally, a capillary tube having a smaller diameter than the pipe 6 or an expansion valve that controls the flow rate by changing the degree of opening of a valve having a mainly conical valve body is used. The evaporator 5 changes the medium in the pipe into steam by exchanging heat with air or water.
[0003]
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 figure indicates a saturated liquid line of the medium flowing in the pipe, and a dotted line 2 indicates a saturated vapor line. The medium becomes a liquid state on the left side of the saturated liquid line, becomes a vapor on the right side of the saturated vapor line, and becomes a wet vapor in which vapor and liquid are mixed between the saturated liquid line and the saturated vapor line. On the other hand, the solid line portion in the figure is a pressure-enthalpy diagram showing the change in the state of the medium. Solid lines (2) and (3) are isoenthalpy lines passing through state (3) and solid lines (2) and (3) are states. This is an isentropic line passing through (3).
[0004]
In FIG. 15, (1) indicates 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 condenses by exchanging heat with the outside air and changes to a high-temperature and high-pressure liquid (2). Next, the liquid medium is adiabatically expanded by the flow rate control means 4 to become low-temperature and low-pressure wet steam (3). Further, it evaporates through heat exchange with air and water through the evaporator 5 and changes to low-temperature and low-pressure steam (4). The medium that has become the low-temperature and low-pressure steam {circle around (4)} is sent again to the compressor 2 and the refrigeration cycle that becomes the high-temperature and high-pressure steam {circle around (1)} is repeated.
[0005]
By the way, when the pressure reduction by the isentropic change, which is an ideal state change, can be realized, the medium changed into the high-temperature and high-pressure liquid (2) by the condenser does not increase the entropy, and the low-temperature and low-pressure wet steam (3) ' To change. In this case, the cooling capacity of the apparatus is an enthalpy difference between the state (4) and the state (3), and becomes larger than the cooling capacity in the equal enthalpy change of the above (3) and (4).
[0006]
However, as described above, generally, the flow rate control means 4 is a capillary having a thin tube diameter or an expansion valve that is controlled by adjusting the opening / closing degree of the valve. In control using capillaries, the medium that has become a high-temperature and high-pressure liquid is depressurized by pressure loss when flowing through the capillary, and a part of the liquid is accelerated while evaporating from the middle of the capillary, causing a large pressure loss, resulting in low-temperature and low-pressure. Changes to wet steam. Since the pressure loss when flowing at such a high speed is accompanied by an irreversible change, it becomes an enthalpy change like the above (2) (3), which loses a part of energy (3), (3), which the medium has. In the case of a refrigeration apparatus using an expansion valve, the enthalpy change (2) (3) is lost, such as losing a part of energy (3) (3) by the shock wave generated when passing through the valve. The cooling capacity obtained by evaporation is also the enthalpy difference between the state (4) and the state (3).
[0007]
Also, for example, Air Conditioning and Sanitary Engineering Society Proceedings No. 70, 1998 are under consideration. This is a conventional refrigeration system equipped with the above compressor, condenser and evaporator, and newly equipped with a speed increasing nozzle, a low pressure chamber, a mixing chamber and an ejector comprising a pressure recovery diffuser and a gas-liquid separator. is there. The medium that has become high-temperature and high-pressure steam that has come out of the condenser recovers its pressure by the action of the ejector and the gas-liquid separator, changes to an ideal isentropic change, and can be operated with a large cooling capacity. However, this conventional device eventually has a problem in that it becomes a device configuration equipped with a gas-liquid separator and new equipment, which increases in size, increases in cost, and requires high-precision flow rate control. It was.
[0008]
[Problems to be solved by the invention]
In conventional refrigeration equipment, the high-temperature and high-pressure refrigerant flowing out of the condenser causes a pressure loss when the flow rate is controlled by a valve or the like, and the pressure is reduced by the generation of a shock wave. There was a problem that the capacity was lowered and the cooling efficiency of the entire refrigeration apparatus was extremely deteriorated. In addition, a gas-liquid separator or the like has been conventionally used for this improvement, but this has a problem in that the cost is increased and high-precision flow rate control is required.
[0009]
The present invention is intended to solve these conventional problems, and can reduce the pressure loss of the medium without using a high-cost and high-precision medium control device, and can be inexpensive and easily perform a highly efficient cooling cycle. A refrigeration apparatus that can be operated is provided.
[0010]
[Means for Solving the Problems]
In the present invention, the first configuration according to the refrigeration apparatus includes a compressor, a condenser, an evaporator, a main passage which they are sequentially connected, a bypass flow path for branching the medium flowing out of the condenser from the main flow passage, the provided in the bypass passage, pressure reducing means for reducing the medium of the bypass flow path is disposed between the evaporator and the condenser, the drive means and the bypass passage of the medium to draw medium of the bypass flow path And a second evaporator installed in the bypass channel, and a medium control unit having a merging unit for merging the medium and the medium in the main channel and a booster for boosting the merged medium.
[0011]
In the refrigeration apparatus according to the second configuration of the present invention, the second evaporator is disposed downstream of the decompression unit, and the medium flowing through the bypass flow channel flows in order of the decompression unit and the second evaporator. After that, it is pulled into the driving means .
[0012]
In the refrigeration apparatus according to the third configuration of the present invention, the second evaporator exchanges heat between water or air cooled by the evaporator of the main flow path and the medium of the bypass flow path .
[0013]
In the refrigeration apparatus according to the fourth configuration of the present invention, the drive means has a nozzle for accelerating the medium in the main flow path and a low pressure chamber for drawing in the medium in the bypass flow path, and the pressure increase means is a diffuser. It is composed .
[0014]
In the refrigeration apparatus according to the fifth configuration of the present invention, the medium control means is configured by a tapered wide nozzle .
[0015]
In the cooling device according to the sixth configuration of the present invention, the medium control means is configured by an orifice having a bottleneck .
[0016]
In the refrigeration apparatus according to the seventh configuration of the present invention, the medium control means drives the valve body, the valve seat, and the valve body to adjust the area of the gap between the valve body and the valve seat, thereby controlling the medium. It has a valve drive device that controls the flow rate .
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, a first embodiment of a refrigeration apparatus according to the present invention will be described. FIG. 1 is a system diagram of a refrigeration apparatus according to Embodiment 1. In the figure, 1 is a refrigeration apparatus according to the present invention, 2 is a compressor that normally compresses and discharges a medium flowing in a pipe, and 3 condenses the medium in a vapor state by exchanging heat with outside air or the like. The condenser 5 to be liquefied is an evaporator that exchanges heat with air, water, or the like to change the medium into steam, and is sequentially connected by a pipe 6. As shown in the figure, a medium control device 500 according to the present invention is connected between the condenser 3 and the evaporator 5 by a pipe 6. The medium control device 500 is for controlling the flow rate, pressure, temperature or state of the medium flowing out from the condenser 3, and this device 500 includes a main flow path 301 for the medium discharged from the condenser 3. A branched bypass channel 302 is installed. The bypass channel 302 is provided with a decompression unit 303 for decompressing a medium flowing through the bypass channel 302 and a drive unit 201 for driving the medium in the bypass channel 302. Further, the main flow path 301 includes a merging means 202 for merging the medium flowing through the bypass flow path 302 and the medium flowing through the main flow path 301, and a pressure increasing means 203 for increasing the pressure of the medium in the main flow path after merging. An installed medium control means 200 and a cooling means 304 for cooling the medium flowing through the main flow path 301 are provided.
[0019]
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 a high-temperature and high-pressure steam (1), then condenses by exchanging heat with air in the condenser 3 and changes into a liquid (2) while maintaining the pressure. To do. This liquefied medium {circle around (2)} flows separately into a main channel 301 and a bypass channel 302 branched from the main channel 301. A part of the medium {circle around (2)} flowing through the bypass passage 302 is adiabatically expanded when passing through the pressure reducing means 303 and is reduced in pressure to change into low-temperature and low-pressure wet steam {circle around (3)}. Heat is exchanged with the medium flowing out from the medium control means 200 through the flow path 301 and is heated to change into superheated steam (4) '. The medium in the bypass flow path that has passed through the cooling means 304 is driven by the drive means 201 provided in the bypass flow path, and is drawn into the medium control means 200 to be in the state (5). On the other hand, the remaining medium {circle around (2)} flowing from the condenser 3 toward the main flow path 301 is supplied to the medium control means 200, and in this state, the pressure is reduced in a state close to an isentropic change while increasing in speed, and the wet vapor state {circle around (2)}. Change to 5 ▼. The medium {circle around (5)} flowing through the main flow path joins with the bypass flow medium {circle around (5)} drawn into the medium control means 200 from the bypass flow path at the merge means 202 and enters the state {circle around (6)}. Further, in the boosting means 203, the voltage is boosted in a state close to the isentropic change and changes to the state (7). The medium whose pressure has been recovered is then heat-exchanged with the medium flowing through the bypass channel by the cooling means 304 and cooled to state (3). In the evaporator 5, heat is exchanged with air, water, etc. After changing to the state (4), it is sent to the compressor 2 again. In this way, the above cooling cycle is repeated.
[0020]
As described above, according to the first embodiment of the present invention, by providing the medium control device 500, the medium flowing through the main flow path has almost no pressure loss from state (3) to state (4). A cooling cycle with ideal energy conversion can be easily realized. Therefore, the cooling capacity of the apparatus is improved, and high-efficiency operation with little energy loss is possible.
[0021]
Embodiment 2. FIG.
Next, a refrigeration apparatus according to Embodiment 2 of the present invention will be described. In the system diagram shown in FIG. 1, the present invention is a refrigeration apparatus using a heat exchanger that performs heat exchange with the medium in the bypass channel as the cooling means 304 that cools the medium flowing in the main channel. By installing the heat exchanger as the cooling means in this manner, a cooling cycle that performs almost ideal energy conversion can be easily realized as in the first embodiment.
[0022]
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, 32 is a heat exchanger for cooling the medium of the main flow path, and is installed upstream of the installation position of the medium control means 200 in which the drive means, the merging means and the pressure raising means are installed. Reference numeral 31 denotes a flow rate adjusting valve as a pressure reducing means for the medium flowing through the bypass flow path, which is sequentially connected to the heat exchanger 32 and the medium control means 200 by a bypass pipe 30.
[0023]
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 steam (1), is condensed by exchanging heat with air in the condenser 3, and changes to high-temperature and high-pressure liquid (2). This liquefied medium {circle around (2)} 'is divided into a main channel 301 and a bypass channel 302 branched from the main channel 301. A part of the medium {circle around (2)} flowing through the bypass passage 302 is adiabatically expanded in the flow rate adjusting valve 31 that is a pressure reducing means, and is reduced in pressure to change into a low temperature and low pressure wet steam state {circle around (3)}}, and then the heat exchanger At 32, heat exchange is performed with the medium flowing through the main flow path 301, and the medium is heated to change to a superheated steam state (4). The medium of the bypass flow path that has passed through the heat exchanger 32 is drawn into the medium control means 200 and enters the state (5). On the other hand, the remaining medium {circle around (2)} flowing from the condenser 3 toward the main flow path 301 is cooled by the heat exchanger 32 to be in the state {circle around (2)}. After that, it is supplied to the medium control means 200, where it is depressurized in a state close to the isentropic change and changes to the wet steam state (5). The medium {circle around (5)} flowing through the main flow path joins the bypass flow medium {circle around (5)} drawn into the medium control means 200 from the bypass flow path to become the state {circle around (6)}, and further the isentropic change It is boosted in a state close to, and changes to state (3). Thereafter, the medium exchanges heat with air or water in the evaporator 5 and changes to a low-temperature and low-pressure steam state (4). Then, the medium is sent again to the compressor 2 to become a high-temperature and high-pressure steam (1). The cooling cycle is repeated.
[0024]
As described above, even when the cooling unit is installed upstream of the driving unit, the merging unit, and the boosting unit, the pressure of the medium in the bypass channel, that is, the temperature can be lower than the temperature of the medium in the main channel. Since the degree of supercooling of the medium can be increased by installing the exchanger 32, it is possible to operate with high efficiency and high cooling capacity with little energy loss.
[0025]
Embodiment 4 FIG.
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, 18 is a heat exchanger installed in the bypass flow path as a cooling means, and is installed downstream of the ejector 10 which is a driving means, a merging means and a boosting means. 17 is a flow rate adjusting valve, and 16 is a bypass pipe. The ejector 10 is an ejector having a function similar to that of the medium control means 200 described above, and is a low pressure chamber that drives and draws the nozzle 12 for accelerating the flow rate of the medium in the main flow path and the medium in the bypass flow path into the casing 11. 13. It is comprised from the confluence | merging chamber 14 which joins the medium of a main flow path, and the medium of a bypass flow path, and the diffuser 15 which pressurizes the medium of a main flow path.
[0026]
In this way, the heat exchanger 18 is installed in the bypass flow path on the downstream side of the installation position of the drive means, the merging means, and the pressure raising means, so that the medium in the main flow path flowing out from the ejector as the medium control means can be efficiently obtained. By cooling, an ideal isentropic change state can be controlled. Therefore, it is possible to operate with high cooling capacity and high efficiency.
[0027]
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 installed in the bypass channel, which is vaporized by heat exchange between water or air cooled by the evaporator 5 and a medium flowing out of the bypass channel. In this way, the second evaporator is installed in the bypass flow path, heat exchange is performed and the medium is vaporized and then merged with the medium in the main flow path, so that the medium is also ideal with less energy loss. Can be controlled. Therefore, operation with high cooling efficiency is possible.
[0028]
Embodiment 6 FIG.
7, 8 and 9 are enlarged views of the medium control means of the refrigeration apparatus according to Embodiment 6 of the present invention. In the apparatus shown in FIG. 7, a taper wide nozzle provided with a confluence 305 for merging the medium from the bypass flow path is used for the medium control means 200 and is installed in the main flow path 301. FIG. 8 shows an example in which an orifice having a narrow passage for restricting the flow path of the medium flowing inside is used as the medium control means 200 and a merging port 305 for merging the medium from the bypass flow path. FIG. 9 shows an expansion valve 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 drive device for driving the valve body 42, 45 is An inflow pipe through which the medium from the main flow path flows into the expansion valve, 50 is a tapered outflow pipe through which the medium from the main flow path flows out from the expansion valve, and 305 is a junction for joining the medium from the bypass flow path It is. The expansion valve controls the flow rate of the medium by adjusting the area of the gap between the valve body 42 and the valve seat 43 by the valve driving device 44.
[0029]
Thus, the drive means for driving the medium of the bypass flow path and the merging means for merging the medium of the bypass flow path and the medium of the main flow path are narrowed down to reduce at least the cross-sectional area of the flow path through which the medium flows. In addition, by using a structure having a confluence of the medium from the bottleneck and the bypass, ideal state control with less energy loss of the medium can be performed, and efficient operation can be performed.
[0030]
Embodiment 7 FIG.
FIG. 10 is a system diagram of a refrigeration apparatus according to Embodiment 7 of the present invention. In FIG. 10, 100 is a temperature measuring device that measures the temperature of the medium, 101 is a pressure measuring device that measures the pressure of the medium, and is installed in the main flow path 301 between the cooling means 304 and the medium control device 200. Reference numeral 102 denotes a saturation temperature calculation means, and 103 denotes a supercooling degree calculation means. A signal is sent to the decompression means 303 provided in the bypass flow path in accordance with the calculated supercooling degree to control the flow rate of the medium in the bypass flow path. I have control. FIG. 11 is a system diagram of a similar refrigeration apparatus according to Embodiment 7 of the present invention. The saturation temperature calculation means 102 and the degree of supercooling are calculated from the temperature and pressure of the medium measured by the temperature measuring device 100 and the pressure measuring device 101. A signal is sent to the valve drive device 44 of the expansion valve in accordance with the degree of supercooling obtained by the calculation means 103 to control the flow rate of the medium in the main flow path.
[0031]
By configuring 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 has been 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 decompression means or the medium control means. Alternatively, 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 according to the degree of superheat. Further, the same effect can be obtained even if the control parameter signal is sent to the compressor for control.
[0032]
Embodiment 8 FIG.
FIG. 12 shows a system diagram of a refrigeration apparatus according to Embodiment 8. The refrigeration apparatus 1 shown in FIG. 12 includes a compressor 2, a condenser 3, an evaporator 5, and a pipe 6 that sequentially connects them, and the condenser 3 and the evaporator 5 are switched in operation by a flow path switching valve 400. In the flow path provided between the condenser 3 and the evaporator 5, the bypass flow path, the pressure reducing means, the driving means, the merging means, and the pressure increasing described in the first embodiment are provided. A medium control device 500 comprising means is installed.
[0033]
Next, the operation of the refrigeration apparatus according to Embodiment 8 will be described. As shown in FIG. 12, the medium compressed into the high-temperature and high-pressure vapor by the compressor 2 flows into the condenser 3 through one flow path switching valve 400, where it is condensed and changed into a liquid. To do. The medium discharged from the condenser 3 passes through the other flow path switching valve 400 and flows into the medium control device 500 installed in the flow path between the condenser 3 and the evaporator 5. The medium that has flowed into the medium control device 500 is controlled to be in a state of low energy loss as described above, changes to a low-temperature and low-pressure wet steam state, and is sent to the evaporator 5 in the evaporator 5. It changes into low-temperature and low-pressure steam through heat exchange with outside air and water. Thereafter, the flow is again sent to the compressor 2 through the flow path switching valve 400, and the same cycle is repeated. When the condenser 3 is installed outdoors and the evaporator 5 is installed indoors and cooling operation is performed, the medium can efficiently cool indoor air by the evaporator 5 as described above. On the other hand, when the heating operation is performed by the above apparatus, the flow path is switched by the flow path switching valve 400, the medium flowing out from the compressor 2 is caused to flow into the evaporator 5, and the medium flowing out from the evaporator 5 is removed. One of the flow path switching valves 400 is switched to flow to the medium control apparatus 500, and the flow path switching valve 400 installed on the downstream side of the medium control apparatus 500 is switched for the medium that exits from the medium control apparatus 500. By sending it to the condenser 3, an efficient heating operation can be performed. According to the above apparatus, the air conditioning operation can be performed without changing the flow direction of the medium flowing in the pipe by simply switching the flow path switching valve.
[0034]
FIG. 13 is a system diagram of the apparatus according to the eighth embodiment, and 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 apparatus shown in FIG. 13 operates in the same manner as the apparatus shown in FIG. 12 by switching the four-way valve, and can easily operate efficiently.
[0035]
As described above, according to the configuration of the present invention, it is possible to perform an efficient operation with little energy loss, and there is no need for expensive incidental equipment and repair of switching, and an evaporator and a condenser pair in one device and one system. Therefore, it is possible to realize a refrigeration apparatus that is compact, lightweight, inexpensive, and capable of switching between cooling and heating. In the above-described example, the case where the condenser 3 and the evaporator 5 are installed one by one has been described. However, the same effect can be obtained when a plurality of condensers 3 and evaporators 5 are installed indoors and outdoors.
[0036]
【The invention's effect】
The refrigeration apparatus according to the present invention is configured as described above, and in any case, the pressure of the medium flowing out of the condenser, which has been a problem in the past, without using expensive and high-precision equipment. Loss can be reduced, and 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 a large cooling capacity, and it is possible to provide a high-performance refrigeration apparatus that is small, light, and inexpensive.
[Brief description of the drawings]
FIG. 1 is a system diagram of a refrigeration apparatus in an example showing Embodiments 1 and 2 of the present invention.
FIG. 2 is a pressure-enthalpy diagram showing the operation of the refrigeration apparatus of the present invention. FIG. 3 is an example showing Embodiment 3 of the present invention, and is a system diagram of the refrigeration apparatus. FIG. 5 is an example showing Embodiment 4 of the present invention and a system diagram of the refrigeration apparatus. FIG. 6 is an example showing Embodiment 5 of the present invention and is a system diagram of the refrigeration apparatus. FIG. 7 is an enlarged view of a medium control means portion in an example showing Embodiment 6 of the present invention.
FIG. 8 is an enlarged view of a medium control means portion in an example showing Embodiment 6 of the present invention.
FIG. 9 is an enlarged view of a medium control means portion in an example showing Embodiment 6 of the present invention.
FIG. 10 is a system diagram of a refrigeration apparatus in an example showing Embodiment 7 of the present invention.
FIG. 11 is a system diagram of a refrigeration apparatus in an example showing Embodiment 7 of the present invention.
FIG. 12 is a system diagram of a refrigeration apparatus in an example showing an eighth embodiment of the present invention.
FIG. 13 is a system diagram of a refrigeration apparatus in an example showing 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 apparatus.
[Explanation of symbols]
1. 1. refrigeration equipment, 2. compressor, Condenser 4. 4. flow control means; Evaporator, 6. Piping 7. Gas-liquid separator, 10. 10. Ejector Casing 12. Nozzle, 13. Low pressure chamber, 14. Merge room 15. Diffuser, 16. Bypass piping,
17. A flow control valve, 18. Heat exchanger, 33. Supercooling measurement means 36. Second evaporator, 41. Casing, 42. Disc,
43. Valve seat, 44. Valve drive device, 45. Inflow pipe,
50. Taper outlet tube, 100. Temperature measuring device,
101. Pressure measuring device, 102. Saturation temperature calculation means,
103. 200. supercooling degree calculating means; Medium control means,
201. Driving means, 202. Merging means, 203. Boosting means,
301. Main flow path, 302. Bypass flow path,
303. Pressure reducing means, 304. Cooling means, 305. Junction,
400. Flow path switching valve, 500. Media control device

Claims (7)

Compressor, a condenser, an evaporator, a main flow path for them sequentially connected,
Bypass passage that branches the medium flowing out of the condenser from the main channel,
Provided in the bypass passage, pressure reducing means for reducing the medium of the bypass passage,
It is installed between the condenser and the evaporator, to merge the medium of the main flow passage medium and the main flow path accelerates the media drive means and the bypass flow passage to draw the medium of the bypass flow path Medium control means having a joining means and a boosting means for boosting the joined medium;
And a refrigeration apparatus comprising a second evaporator installed in the bypass flow path . The second evaporator is disposed downstream of the decompression means,
2. The refrigeration apparatus according to claim 1, wherein the medium flowing through the bypass channel is drawn into the driving unit after flowing in the order of the decompression unit and the second evaporator . The refrigeration apparatus according to claim 1 or 2 , wherein the second evaporator exchanges heat between water or air cooled by the evaporator of the main flow path and the medium of the bypass flow path . The drive means has a nozzle for accelerating the medium of the main flow path and a low pressure chamber for drawing the medium of the bypass flow path,
The refrigeration apparatus according to any one of claims 1 to 3 , wherein the boosting means is a diffuser . The refrigeration apparatus according to any one of claims 1 to 3, wherein the medium control means is a tapered narrow nozzle . The refrigeration apparatus according to any one of claims 1 to 3, wherein the medium control means is an orifice having a bottleneck . The medium control means includes a valve drive device that controls the flow rate of the medium by driving the valve body, the valve seat, and the valve body to adjust an area of a gap between the valve body and the valve seat. The refrigeration apparatus according to any one of claims 1 to 3 .

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