A kind of jet refrigeration system and refrigeration equipment

Abstract

The present invention discloses an ejector refrigeration system and refrigeration equipment, wherein the ejector refrigeration system comprises a compressor, a condenser, a first evaporation circuit connected in series between the condenser outlet and the compressor inlet, a second evaporation circuit arranged in parallel with the first evaporation circuit, and a circuit switching unit; the first evaporation circuit comprises a first throttling device connected to the condenser and a first evaporator connected between the first throttling device and the compressor; the second evaporation circuit comprises an ejector, a gas-liquid separator, a second throttling device, and a second evaporator connected to the second throttling device. The present invention can realize the oil return of the compressor oil accumulated in the gas-liquid separator without setting an oil return pipeline, and can more conveniently realize the control of the refrigeration system while simplifying the structure.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, in particular to a jet refrigeration system and refrigeration equipment. Background Art

[0002] As people's living standards improve, their demands for household refrigerators are getting higher and higher, including multi-temperature zones, fresh-keeping, rapid freezing, intelligent control, etc. However, the energy efficiency of refrigerators is still one of the most important indicators to consider. According to relevant statistics, the power consumption of small refrigeration equipment such as refrigerators accounts for 30%-40% of the total power consumption of residents, so it is of great significance to explore refrigerator energy-saving technology.

[0003] Dual-temperature refrigerators can meet the needs of freezing and refrigeration at the same time and have broad application prospects. Currently, dual-temperature refrigerators on the market mostly use a vapor compression refrigeration cycle with two evaporators in parallel or series-parallel, and these refrigeration cycles all use capillaries as the main throttling element, so there will be large throttling losses.

[0004] The ejector has the advantages of simple structure, no moving parts, and reliable operation. The application of the ejector in the refrigeration system can effectively recover the expansion work lost in the throttling process, increase the suction pressure of the compressor, and thus reduce the power consumption of the compressor. Especially in the dual-evaporator refrigeration system, there is a pressure difference between the high-pressure and low-pressure evaporators. The ejector can be arranged at multiple positions in the cycle to achieve the purpose of recovering the expansion work of the throttling process, especially the high-pressure evaporator branch, and improving the performance of the refrigeration system. However, in the refrigeration system using the ejector, the refrigeration oil is easy to accumulate at the bottom of the gas-liquid separator, making it difficult for the compressor to return oil, and the compressor will cause overheating and shutdown or even damage due to the lack of lubrication of the refrigeration oil. Summary of the invention

[0005] The purpose of the present invention is to provide a jet refrigeration system to solve the deficiencies in the prior art. It can realize the return of the compressor oil accumulated in the gas-liquid separator without setting up an oil return pipeline, simplify the structure and more conveniently realize the control of the refrigeration system.

[0006] The present invention provides an ejector refrigeration system, comprising a compressor, a condenser, a first evaporation circuit connected in series between an outlet of the condenser and an inlet of the compressor, a second evaporation circuit arranged in parallel with the first evaporation circuit, and a circuit switching unit, wherein the circuit switching unit is used to control the on or off of the first evaporation circuit and the circuit switching unit is used to control the on or off of the second evaporation circuit;

[0007] The first evaporation circuit includes a first throttling device in communication with the condenser and a first evaporator connected between the first throttling device and the compressor;

[0008] The second evaporation circuit includes an ejector, a gas-liquid separator, a second throttling device and a second evaporator connected to the second throttling device; the ejector has an ejection inlet connected to the condenser, an ejection outlet and an injection inlet connected to the second evaporator; the gas-liquid separator has a separator inlet connected to the ejection outlet, a gas phase outlet connected to the compressor and a liquid phase outlet connected to the second throttling device.

[0009] Further, the circuit switching unit is a three-way solenoid valve having an inlet, a first outlet and a second outlet;

[0010] The condenser is in communication with the inlet, the first outlet is in communication with the first throttling device, and the second outlet is in communication with the injection inlet.

[0011] Furthermore, the circuit switching unit further includes a first solenoid valve arranged on the first evaporation circuit and a second solenoid valve arranged on the second evaporation circuit.

[0012] Furthermore, the second solenoid valve is arranged between the condenser and the ejector.

[0013] Further, the first solenoid valve is arranged between the condenser and the first throttling device or the first solenoid valve is arranged between the first evaporator and the compressor.

[0014] Furthermore, a dryer is connected to the outlet of the condenser.

[0015] Furthermore, the condenser is an air-cooled condenser, and a built-in condenser is provided between the dryer and the condenser.

[0016] Furthermore, the first evaporator is a refrigeration evaporator, and the second evaporator is a freezing evaporator.

[0017] A refrigeration device, characterized in that it comprises a box and the injection refrigeration system, wherein the box has a first refrigeration compartment and a second refrigeration compartment, the first evaporator is arranged in the first refrigeration compartment, and the second evaporator is arranged in the second refrigeration compartment.

[0018] Furthermore, the refrigeration equipment is a refrigerator.

[0019] Compared with the prior art, the scheme disclosed in the embodiment of the present invention sets the first evaporator circuit in parallel with the second evaporation circuit and is provided with a circuit switching unit, so that the circuit switching unit can control the first evaporation circuit and the second evaporation circuit to operate independently. When the first evaporation circuit operates independently, the refrigerant in the second evaporation circuit can be transferred to the first evaporation circuit through the suction of the compressor, and the refrigerant can flow back to the compressor during the circulation of the first evaporation circuit, so that the compressor oil accumulated in the refrigerant flows back to the compressor. This embodiment can realize the return of the compressor oil without setting an oil return pipeline, which simplifies the structure and makes it more convenient to realize the control of the refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the ejection refrigeration system disclosed in the first embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the overall structure of an ejection refrigeration system disclosed in a second embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the overall structure of an ejection refrigeration system disclosed in a third embodiment of the present invention;

[0023] Explanation of the reference numerals: 1 - compressor, 2 - condenser, 3 - ejector, 31 - ejection inlet, 32 - ejection inlet, 33 - ejection outlet, 34 - mixing chamber, 35 - diffusion chamber, 36 - nozzle 4 - first throttling device, 5 - second throttling device, 6 - first evaporator, 7 - second evaporator, 8 - gas-liquid separator, 81 - separator inlet, 82 - gas phase outlet, 83 - liquid phase outlet, 9 - circuit switching unit, 91 - inlet, 92 - first outlet, 93 - second outlet, 94 - first solenoid valve, 95 - second solenoid valve, 10 - built-in condenser, 11 - dryer. DETAILED DESCRIPTION

[0024] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as limiting the present invention.

[0025] Embodiments of the present invention: Figure 1 As shown, an ejection refrigeration system is disclosed, comprising a compressor 1, a condenser 2, a first evaporation circuit connected in series between an outlet of the condenser 2 and an inlet of the compressor 1, and a second evaporation circuit arranged in parallel with the first evaporation circuit.

[0026] The first evaporation circuit includes a first throttling device 4 connected to the outlet of the condenser 2 and a first evaporator 6 connected between the first throttling device 4 and the inlet of the compressor 1. In this embodiment, the first evaporator 6 can be a refrigeration evaporator, and the first evaporator 6 can be arranged in the refrigeration compartment of the refrigeration equipment, and the first throttling device 4 is specifically a capillary tube. The condenser 2, the first throttling device 4, the first evaporator 6 and the compressor 1 are connected in series to form a first circulation loop, and the first circulation loop provides coldness for the refrigeration compartment of the refrigeration equipment.

[0027] The second evaporation circuit includes an ejector 3, a gas-liquid separator 8, a second throttling device 5 and a second evaporator 7 connected to the second throttling device 5; the ejector 3 has an injection inlet 31 connected to the condenser 2, an injection inlet 32 ​​connected to the second evaporator 7 and an injection outlet 33; the gas-liquid separator 8 has a separator inlet 81 connected to the injection outlet 33, a gas phase outlet 82 connected to the compressor 1 and a liquid phase outlet 83 connected to the second throttling device 5.

[0028] The gas-liquid two-phase refrigerant flowing out of the second evaporator 7 is pressurized by the ejector 3 and then ejected from the ejector outlet 33, and then enters the gas-liquid separator 8. The gas-phase refrigerant flowing out of the gas-phase outlet 82 of the gas-liquid separator 8 returns to the compressor 1 for recirculation, while the liquid-phase refrigerant flowing out of the liquid-phase outlet 83 of the gas-liquid separator 8 enters the second evaporator 7 after throttling and pressure reduction to absorb heat so as to cool the outside.

[0029] In this embodiment, the second evaporator 7 may be a freezing evaporator, and the second evaporator 7 may be arranged in a freezing compartment of a refrigeration device, and the second throttling device 5 is specifically a capillary tube.

[0030] The injection refrigeration system further includes a circuit switching unit 9, which is used to control the on or off of the first evaporation circuit and the on or off of the second evaporation circuit. The circuit switching unit 9 can control the second evaporation circuit to be closed so that all the refrigerant flowing out of the condenser 2 enters the first evaporation circuit. Of course, the circuit switching unit 9 can also control the first evaporation circuit to be closed so that all the refrigerant flowing out of the condenser enters the second evaporation circuit.

[0031] In this embodiment, the working principle of the ejector 3 is that when the working fluid flows through the injection inlet 31, the static pressure energy or thermal energy of the airflow is converted into kinetic energy, and the working fluid forms a high-speed jet to cause a local vacuum, so that its pressure is lower than the pressure of the ejection fluid. Under the action of this pressure difference, the ejection fluid is ejected from the ejection inlet 32 ​​into the mixing chamber 34 of the ejector 3. Due to the turbulent diffusion effect of the jet boundary layer, the working fluid is mixed with the surrounding entrained ejection fluid for energy exchange. After the ejection fluid enters the mixing chamber 34 of the ejector 3, it is accelerated under the action of the working steam, and the two steam fluids gradually form a single, uniform, and pressure-neutral mixed fluid in the mixing chamber 34. After the working fluid and the ejection fluid enter the mixing chamber 34, the speed is balanced, usually accompanied by a pressure increase. Subsequently, the steam fluid enters the diffusion chamber 35 of the ejector 3, the speed is continuously slowed down, the kinetic energy is continuously converted into static pressure energy, and the mixed fluid is decelerated and pressurized.

[0032] Under the action of the circuit switching unit 9, the working fluid entering the ejector 3 can be set to the high-temperature and high-pressure gas flowing out of the condenser 2. The high-temperature and high-pressure gas enters from the injection inlet 31, and then is ejected into the mixing chamber 34 through the nozzle 36, and is mixed with the injected injection fluid in the mixing chamber 34. The injection fluid is the low-pressure gas-phase refrigerant flowing out of the second evaporator 7, and is injected into the mixing chamber 34 from the injection inlet 32, and is mixed with the high-temperature and high-pressure working fluid in the mixing chamber 34 to form a mixed fluid. The formed mixed fluid is decelerated and pressurized by the diffusion chamber 35 to become a medium-pressure gas-liquid two-phase flow refrigerant, and then discharged from the injection outlet 33, and then enters the gas-liquid separator 8. The saturated gas refrigerant separated in the gas-liquid separator 8 flows out from the gas phase outlet 82 and is sucked into the inlet of the compressor 1, while the liquid refrigerant separated by the gas-liquid separator 8 flows out from the liquid phase outlet 83, passes through the throttling device, is cooled and reduced in pressure, and finally enters the evaporator to absorb heat.

[0033] The introduction of the ejector 3 can actually increase the pressure of the low-pressure gas-phase refrigerant flowing out of the evaporator. During the pressure increase process, part of the expansion work of the throttling device after throttling can be recovered, which is beneficial to reducing the power consumption of the compressor and can effectively improve the performance of the compression refrigeration system. In the ejector 3 refrigeration system, the ejector 3 can assist in increasing the suction pressure of the compressor 1, thereby reducing the compression ratio of the compressor 1 and achieving the purpose of reducing power consumption.

[0034] The refrigerant flowing out of the throttling device forms a low-temperature and low-pressure gas-liquid two-phase after cooling and reducing the pressure, and then enters the evaporator to absorb heat and vaporize. If the heat is sufficient, the refrigerant can absorb heat in the evaporator to achieve complete vaporization, thereby forming a low-pressure gas-phase refrigerant. In this way, the gas-phase refrigerant coming out of the evaporator is sucked into the compressor for a new round of circulation. However, in the actual working process, the refrigerant coming out of the evaporator is generally in a state of gas-liquid coexistence. Because the heat absorption is not fully achieved in the evaporator, that is, the cooling capacity of part of the refrigerant coming out of the evaporator is not fully released, especially when the evaporator requires less cooling capacity, it is easy to cause the gas phase content of the refrigerant flowing out of the evaporator to be low, which further reduces the pressure of the gas-phase refrigerant, which will increase the difficulty of compressor suction and thus affect the efficiency of the compressor.

[0035] In order to assist in increasing the suction pressure of the compressor 1 and thereby reduce the compression ratio of the compressor 1, the present embodiment creatively draws the refrigerant from the evaporator into the ejector 3 by means of an injection and mixes it with the working fluid flowing in from the injection inlet 31 of the ejector 3. The working fluid entering from the injection inlet 31 is the low-temperature and high-pressure refrigerant flowing out of the condenser. The working fluid will be throttled and depressurized when it passes through the nozzle 36 of the ejector 3 and enters the mixing chamber 34. The throttled and depressurized working fluid will be mixed with the refrigerant entering the mixing chamber 34 from the injection inlet 32. The mixed refrigerant will be decelerated and pressurized after passing through the diffusion chamber 35, and finally flow out from the injection outlet 33. In this process, the mixed refrigerant will actually be pressurized, thereby assisting in increasing the suction pressure of the compressor 1 and thereby reducing the compression ratio of the compressor 1. At the same time, in the process of increasing the pressure, part of the refrigerant flowing out of the evaporator can be gasified again, which can also increase the gas pressure of the gas-phase refrigerant, which is beneficial to reducing the compression ratio of the compressor 1.

[0036] During operation in the refrigeration system, oil injection is unavoidable in the compressor 1, that is, a small amount of refrigeration oil will enter the pipeline of the refrigeration system along with the exhaust of the compressor 1, that is, the refrigeration oil will flow in the refrigeration system along with the circulation of the refrigerant. In the refrigeration system disclosed in the present embodiment, in the second evaporation circuit, the oil enters the ejector 3 along with the refrigerant, and then the refrigerant enters the gas-liquid separator 8 in a two-phase state, and the separation of the gas phase and the liquid phase of the refrigerant is achieved through the action of impact and gravity. Due to the large volume of the gas-liquid separator 8, the refrigerant in the two phases will accumulate at the bottom of the gas-liquid separator 8 under the action of impact and gravity when entering the gas-liquid separator 8, and the ejector 3 causes a low pressure to be formed at the bottom of the gas-liquid separator 8 and performs a suction effect on the liquid refrigerant at the bottom; at this time, a small amount of the oil dissolved in the refrigerant will The oil is drawn away by the compressor 1, but most of it enters the second evaporator 7 with the liquid refrigerant, and is then sucked by the injection inlet 32 ​​of the ejector 3, and then enters the gas-liquid separator 8 again; therefore, most of the oil will be circulated externally between the ejector 3-gas-liquid separator 8-second evaporator 7-ejector 3 and cannot return to the compressor 1; and since the second evaporator 7 is basically located at the lowest point of the refrigeration system, the oil is easy to accumulate at the bottom of the second evaporator 7, which will cause the effective heat exchange area of ​​the second evaporator 7 to decrease over time, and the compressor 1 will overheat and shut down or even be damaged due to lack of lubrication.

[0037] As described above, in this embodiment, the second evaporation circuit uses the ejector 3 to improve efficiency and boost pressure, which can help reduce the power consumption of the compressor and effectively improve the performance of the compression refrigeration system. However, since the liquid refrigerant in the second evaporation circuit cannot flow back to the compressor, it is easy to cause the compressor oil ejected by the compressor to accumulate in the gas-liquid separator in the second evaporation circuit. In the scheme disclosed in this embodiment, the first evaporator circuit is set to be connected in parallel with the second evaporation circuit and is provided with a circuit switching unit 9, so that the circuit switching unit 9 can control the first evaporation circuit and the second evaporation circuit to operate separately. When the first evaporation circuit is operated separately, the refrigerant in the second evaporation circuit can be transferred to the first evaporation circuit through the suction of the compressor 1. The refrigerant can flow back to the compressor during the circulation of the first evaporation circuit, thereby causing the compressor oil accumulated in the refrigerant to flow back to the compressor. This embodiment can also realize the return of the compressor oil without setting the return oil pipeline, simplifying the structure and realizing the control of the refrigeration system more conveniently.

[0038] In addition, the typical ejector efficiency enhancement method currently uses the method of diverting from the outlet of the condenser. Part of the refrigerant diverted from the condenser directly enters the injection inlet of the ejector, and the other part passes through an evaporator and enters the ejection inlet of the ejector again. Diverting from the condenser outlet will cause the refrigerant flow entering the nozzle to become smaller, which requires the nozzle throat diameter to be smaller, which is not conducive to the processing of the nozzle; and the ejection after the condenser diversion will reduce the ejection capacity of the ejector, thereby affecting the boost effect and causing the ejector efficiency to decrease.

[0039] In the present application, the circuit switching unit 9 is provided to directly connect the pipeline flowing out of the condenser 2 to the injection inlet 31 of the ejector 3. Since the refrigerant flowing out of the condenser 2 is in a high-pressure state, it is directly connected to the injection inlet 31 without diversion, so that the refrigerant has a higher flow rate, and can still produce a strong injection effect when the nozzle 36 is large. It is ensured that the flow rate of the refrigerant entering the nozzle 36 is large enough and the flow rate is high enough, which can avoid the limitation of the size requirement of the nozzle 36 of the ejector 3 caused by the small flow rate entering the injection inlet 31 in the prior art, thereby facilitating the processing of the nozzle 36 and reducing the production cost of the ejector 3. The ejector 3 can obtain a higher boosting capacity and reduce the pressure ratio and power consumption of the compressor.

[0040] Specifically, in this embodiment, the circuit switching unit 9 can be a three-way solenoid valve disposed after the outlet of the condenser 2 and has an inlet 91, a first outlet 92, and a second outlet 93 connected to the outlet of the condenser 2. The first outlet 92 is connected to the first throttling device 4, and the second outlet 93 is connected to the injection inlet 31 of the injector 3. A valve body is also disposed in the three-way valve, and the valve body is used to control the inlet 91 to be connected to the first outlet 92 or to be connected to the second outlet 93.

[0041] After the inlet 91 is connected to the first outlet 92, the air inlet 91 and the second outlet 93 are closed, the second evaporation circuit is closed, and the refrigerant in the second evaporation circuit migrates to the first evaporation circuit under the continuous extraction of the compressor 1, and the migrated refrigerant circulates in the first evaporation circuit. In the process of the refrigerant migrating from the second evaporation circuit to the first evaporation circuit, the compressed oil accumulated in the gas-liquid separator in the second circulation circuit can flow back to the compressor. Specifically, the high-temperature and high-pressure refrigerant gas flowing out of the compressor 1 enters the condenser 2, and the refrigerant flowing out of the condenser 2 enters the first throttling device 4 and then enters the first evaporator 6 to cool the refrigerated compartment.

[0042] After the inlet 91 is connected with the second outlet 93, the high-pressure liquid refrigerant flowing out of the condenser 2 directly enters the injection inlet 31. When the high-pressure liquid refrigerant flows through the nozzle 36, the static pressure energy or thermal energy of the airflow is converted into kinetic energy, and the high-pressure liquid refrigerant forms a high-speed jet to cause a local vacuum, so that its pressure is lower than the pressure of the ejection fluid. Under the action of this pressure difference, the low-pressure gas-liquid mixed phase from the second evaporator 7 is injected into the mixing chamber 34 of the ejector 3 from the injection inlet 32 ​​and mixed with the fluid ejected from the nozzle 36 to form a single uniform mixed fluid with a medium pressure. The mixed fluid enters the diffusion chamber 35 of the ejector 3 to increase the pressure, and the refrigerant flowing out of the gas phase outlet 82 of the gas-liquid separator 8 is sucked into the compressor 1, and the refrigerant flowing out of the liquid phase outlet 83 of the gas-liquid separator 8 enters the second throttling device 5 and then enters the second evaporator 7 to cool the freezing compartment.

[0043] In another embodiment, the gas circuit switching unit 9 includes a first solenoid valve 94 disposed on the first evaporation circuit and a second solenoid valve 95 disposed on the second evaporation circuit. The second solenoid valve 95 is disposed between the condenser 2 and the ejector 3. The first solenoid valve 94 is disposed between the condenser 2 and the first throttling device 4 (such as Figure 2 ) or the first solenoid valve 94 is arranged between the first evaporator 6 and the compressor 1 (as shown Figure 3 It should be noted that when the second evaporation circuit is closed, the gas phase outlet 82 of the gas-liquid separator 8 is connected to the air inlet of the compressor 1, so as not to affect the compressor 1 to extract the refrigerant in the second evaporation circuit.

[0044] Furthermore, a dryer 11 is provided between the condenser 2 and the injection inlet 31. In order to achieve a better condensation effect, the condenser 2 is an air-cooled condenser, and a built-in condenser 10 is provided between the dryer 11 and the condenser 2.

[0045] Another embodiment of the present invention further discloses a refrigeration device, including a box and the injection refrigeration system, wherein the box has a first refrigeration compartment and a second refrigeration compartment, the first evaporator is arranged in the first refrigeration compartment, and the second evaporator is arranged in the second refrigeration compartment.

[0046] Specifically, the refrigeration device is a refrigerator, the first refrigeration compartment is a cold storage compartment, the first evaporator is a cold storage evaporator, the second refrigeration compartment is a freezer compartment, and the second evaporator is a freezer evaporator.

[0047] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. An ejection refrigeration system, characterized in that: The invention comprises a compressor, a condenser, a first evaporation circuit connected in series between an outlet of the condenser and an inlet of the compressor, a second evaporation circuit arranged in parallel with the first evaporation circuit, and a circuit switching unit, wherein the circuit switching unit is used to control the conduction or closing of the first evaporation circuit and the circuit switching unit is used to control the conduction or closing of the second evaporation circuit; The first evaporation circuit includes a first throttling device in communication with the condenser and a first evaporator connected between the first throttling device and the compressor; The second evaporation circuit includes an ejector, a gas-liquid separator, a second throttling device and a second evaporator connected in sequence from the circuit switching unit; the ejector has an ejection inlet and an ejection outlet for communicating with the condenser and an injection inlet connected with the second evaporator; the gas-liquid separator has a separator inlet connected with the ejection outlet, a gas phase outlet connected with the compressor and a liquid phase outlet connected with the second throttling device.

2. The ejection refrigeration system according to claim 1, characterized in that: The circuit switching unit is a three-way solenoid valve having an inlet, a first outlet and a second outlet; The condenser is in communication with the inlet, the first outlet is in communication with the first throttling device, and the second outlet is in communication with the injection inlet.

3. The ejection refrigeration system according to claim 1, characterized in that: The circuit switching unit further includes a first solenoid valve disposed on the first evaporation circuit and a second solenoid valve disposed on the second evaporation circuit.

4. The ejection refrigeration system according to claim 3, characterized in that: The second solenoid valve is disposed between the condenser and the ejector.

5. The ejection refrigeration system according to claim 3, characterized in that: The first solenoid valve is disposed between the condenser and the first throttling device or the first solenoid valve is disposed between the first evaporator and the compressor.

6. The ejection refrigeration system according to claim 1, characterized in that: The outlet of the condenser is also connected with a dryer.

7. The ejection refrigeration system according to claim 6, characterized in that: The condenser is an air-cooled condenser, and a built-in condenser is also arranged between the dryer and the condenser.

8. The ejection refrigeration system according to claim 1, characterized in that: The first evaporator is a refrigeration evaporator, and the second evaporator is a freezing evaporator.

9. A refrigeration device, characterized in that: The invention comprises a box body and the ejection refrigeration system according to any one of claims 1 to 8, wherein the box body has a first refrigeration compartment and a second refrigeration compartment, the first evaporator is arranged in the first refrigeration compartment, and the second evaporator is arranged in the second refrigeration compartment.

10. The refrigeration device according to claim 9, characterized in that: The refrigeration equipment is a refrigerator.

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