Refrigerating system for air conditioner and air conditioner

Abstract

The utility model provides a refrigerating system for an air conditioner and the air conditioner. The refrigerating system is characterized in that a first gas-liquid separator is connected between a first exhaust port of a low-pressure compressor and a second air inlet of a high-pressure compressor; a second exhaust port of the high-pressure compressor is connected with a first refrigerant input end of the condenser component; a second refrigerant input end of the intermediate heat exchanger component is connected with a first refrigerant output end of the condenser component; the second refrigerant output end is connected with a first air inlet of the low-pressure compressor through a first refrigerant flow path; the third refrigerant output end is connected with the first gas-liquid separator through a second refrigerant flow path. The technical problem that in an existing two-stage compression refrigerating system, the multi-stage compression mode of the two compressors is rough, specifically, an exhaust outlet of the low-pressure compressor of the two compressors is directly connected to an air suction port of the high-pressure compressor through the gas-liquid separator, and the low-pressure compressor of the two compressors is directly connected to the air suction port of the high-pressure compressor through the gas-liquid separator. Therefore, a machine body of the high-pressure compressor is easily damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration technical field, specifically, relate to a refrigeration system and air conditioner for air conditioner. BACKGROUND

[0002] In modern refrigeration technology, the traditional refrigeration cycle system mainly adopts single stage or multistage compressor to carry out refrigeration process. Single stage compression refrigeration system is usually composed of compressor, condenser, expansion valve and evaporator four basic components, and its working principle is that the compressor sucks in low pressure and low temperature refrigerant and compresses it into high pressure and high temperature gas, then cools it through the condenser, changes it into liquid, and then enters the evaporator through the expansion valve to absorb heat and refrigerate.

[0003] And in the multistage compression refrigeration system, at least two compressors are usually arranged to make up for the defect of insufficient refrigeration efficiency of the refrigeration system in the single stage compression process.

[0004] However, in the existing two-stage compression refrigeration system, the multistage compression mode of the two compressors is relatively rough, which is specifically manifested that the exhaust outlet of the low pressure compressor in the two compressors is directly connected to the suction port of the high pressure compressor through the gas-liquid separator, thereby easily causing damage to the body of the high pressure compressor. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem that in the existing two-stage compression refrigeration system, the multistage compression mode of the two compressors is relatively rough, which is specifically manifested that the exhaust outlet of the low pressure compressor in the two compressors is directly connected to the suction port of the high pressure compressor through the gas-liquid separator, thereby easily causing damage to the body of the high pressure compressor.

[0006] To solve the above problems, the utility model provides a refrigeration system for air conditioner, compressor component, the compressor component includes high pressure compressor and low pressure compressor, the first exhaust port of low pressure compressor and the second gas inlet of high pressure compressor are connected with first gas-liquid separator, the second exhaust port of high pressure compressor and the first refrigerant input end of condenser component are connected, intermediate heat exchanger component, the second refrigerant input end of intermediate heat exchanger component and the first refrigerant output end of condenser component are connected, and intermediate heat exchanger component is equipped with second refrigerant output end and third refrigerant output end, second refrigerant output end is connected with the first gas inlet of low pressure compressor through first refrigerant flow path, third refrigerant output end is connected with first gas-liquid separator through second refrigerant flow path, wherein, the heat exchange of refrigerant is carried out with condenser component and intermediate heat exchanger component in turn.

[0007] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: specifically, by additionally arranging the intermediate heat exchanger component at the first refrigerant output end of the condenser component, the intermediate heat exchanger component is used to perform heat exchange on the refrigerant passing through the condenser component, thereby improving the overall heat exchange efficiency of the refrigeration system; in addition, in combination with the series connection between the high-pressure compressor and the low-pressure compressor, to avoid the exhaust pressure of the low-pressure compressor being directly input into the high-pressure compressor, thereby causing the body of the high-pressure compressor to be damaged, the refrigerant after heat exchange by the intermediate heat exchanger component is guided into the first gas-liquid separator from the second refrigerant flow path, and is mixed with the high-temperature and high-pressure gaseous refrigerant output by the low-pressure compressor in the first gas-liquid separator, thereby reducing the temperature and pressure of the mixed refrigerant, so as to ensure that the temperature and pressure of the refrigerant input into the high-pressure compressor meet the safety threshold requirements of the high-pressure compressor, and further ensure the safe and stable operation of the refrigeration system.

[0008] In an example of the present application, the intermediate heat exchanger component comprises a first three-way valve, an intermediate heat exchanger and a first throttling device; the first three-way valve is provided with a first port one, a second port one and a third port one, and the first port one is connected with the first refrigerant output end; the intermediate heat exchanger is provided with a first intermediate flow path between a refrigerant input end one and the second port one, and a second intermediate flow path between a refrigerant input end two and the third port one; the first intermediate flow path is connected with the first refrigerant flow path by the second refrigerant output end, and the second intermediate flow path is connected with the second refrigerant flow path by the third refrigerant output end; and the first throttling device is arranged in the second intermediate flow path.

[0009] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: specifically, by adjusting the first throttling device, the temperature and pressure of the refrigerant input into the intermediate heat exchanger are adjusted, and then the temperature difference of the refrigerant input into the intermediate heat exchanger by the first intermediate flow path and the second intermediate flow path is used to realize the heat exchange effect of the intermediate heat exchanger, and the refrigerant heat of the refrigerant input into the condenser component is specifically recovered.

[0010] In an example of the present application, the first refrigerant flow path is provided with a second three-way valve, an evaporator component and an ejector; the second three-way valve is provided with a first port two, a second port two and a third port two; the first port two is connected with the second refrigerant output end; the second port two is connected with a third refrigerant input end of the evaporator component; a fourth refrigerant output end of the evaporator component and the third port two are respectively connected to an input end of the ejector, and an output end of the ejector is connected with the first gas inlet through a second gas-liquid separator.

[0011] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: by arranging the ejector, the specific surface area of the high-pressure refrigerant in the evaporation process is increased, and the efficiency of the evaporation process is improved; the ejector is used to replace the throttling device, the expansion work is recovered, and the throttling loss is reduced.

[0012] In one example of the present application, the evaporator component comprises: a second heat exchange flow path connected between the second port two and the input end; an evaporator connected to the second heat exchange flow path; and a second throttling device arranged in the second heat exchange flow path and located between the evaporator and the second port two.

[0013] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: specifically, by arranging the second throttling device, the evaporation efficiency of the evaporator is effectively ensured; specifically, by adjusting the second throttling device, the temperature and pressure of the refrigerant input into the evaporator are adjusted, so that the evaporator can fully exchange heat with the indoor environment during the evaporation and heat absorption process, and the user's use experience is improved.

[0014] In one example of the present application, the first throttling device and / or the second throttling device is an expansion valve.

[0015] In one example of the present application, the ejector comprises a nozzle, a convergent pipe, a mixing chamber and a diffuser pipe which are in communication with each other; the nozzle is connected with the second heat exchange flow path and is used to guide the refrigerant transmitted by the second heat exchange flow path to the mixing chamber through the convergent pipe; the nozzle is also connected with the third port two; and the diffuser pipe is connected with the second gas-liquid separator through a refrigerant circuit.

[0016] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: the refrigeration efficiency of the refrigeration system is improved.

[0017] In one example of the present application, the condenser component comprises: a first heat exchange flow path connected between the second exhaust port and the intermediate heat exchanger component; a condenser connected to the first heat exchange flow path; and a liquid accumulator arranged in the first heat exchange flow path and located between the condenser and the intermediate heat exchanger component.

[0018] Compared with the prior art, the technical effects achieved by the technical scheme are as follows: specifically, by arranging the liquid accumulator, the state of the refrigerant output by the condenser is adjusted and stabilized.

[0019] In one example of the present application, the refrigerant parameter value of the refrigerant after the heat interaction with the intermediate heat exchanger component is defined as a first refrigerant parameter value, and the refrigerant parameter value of the refrigerant output by the low-pressure compressor is defined as a second refrigerant parameter value; wherein the first refrigerant parameter value is less than the second refrigerant parameter value, and the refrigerant parameter value includes the refrigerant temperature and the refrigerant pressure.

[0020] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: further realizing the adjustment of the pressure of the refrigerant input into the high-pressure compressor, that is, ensuring that the pressure is less than the exhaust pressure of the low-pressure compressor, and effectively avoiding the direct introduction of the exhaust pressure of the low-pressure compressor into the high-pressure compressor, which causes damage to the body of the high-pressure compressor.

[0021] In another aspect, the utility model still provides a kind of air conditioner, comprising: the refrigeration system in any of the above examples.

[0022] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the technical effects corresponding to any of the above examples can be achieved, which will not be repeated here.

[0023] After adopting the technical scheme of the utility model, the following technical effects can be achieved:

[0024] (1) by adding intermediate heat exchanger component to the first refrigerant output end of condenser component, the refrigerant passing through condenser component is further heat exchanged using intermediate heat exchanger component, which improves the overall heat exchange efficiency of the refrigeration system.In addition, in combination with the setting feature of series connection between high-pressure compressor and low-pressure compressor, to avoid the direct input of the exhaust pressure of low-pressure compressor into high-pressure compressor, which causes damage to the body of high-pressure compressor, therefore, the refrigerant after heat exchange by intermediate heat exchanger component is introduced into first gas-liquid separator from second refrigerant flow path, mixed with high-temperature and high-pressure gaseous refrigerant output by low-pressure compressor in first gas-liquid separator, which reduces the temperature and pressure of mixed refrigerant, thereby ensuring that the temperature and pressure of refrigerant input into high-pressure compressor meet the safety threshold requirements of high-pressure compressor, and further ensuring the safe and stable operation of refrigeration system.

[0025] (2) by adjusting the first throttling device, the temperature and pressure of refrigerant input into intermediate heat exchanger are adjusted, therefore, the temperature difference of refrigerant input into intermediate heat exchanger from first intermediate flow path and second intermediate flow path is used to realize the heat exchange effect of intermediate heat exchanger, which specifically recovers refrigerant heat of refrigerant input into condenser component.

[0026] (3) by setting ejector, the specific surface area of high-pressure refrigerant is increased during evaporation process, which improves the efficiency of evaporation process, and the ejector is used to replace throttling device to recover expansion work and reduce throttling loss. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0028] Figure 1 A structure schematic view of a refrigerating system for an air conditioner is provided in the embodiment of the present application.

[0029] Mark explanation:

[0030] 100, refrigerating system; 11, high-pressure compressor; 111, second exhaust port; 112, second intake port; 12, low-pressure compressor; 121, first exhaust port; 122, first intake port; 13, first gas-liquid separator; 20, condenser component; 21, first heat exchange flow path; 22, condenser; 221, first refrigerant output end; 23, liquid accumulator; 31, intermediate heat exchanger; 312, second refrigerant output end; 311, third refrigerant output end; 33, first refrigerant flow path; 32, second refrigerant flow path; 34, first intermediate flow path; 35, second intermediate flow path; 41, first three-way valve; 42, first throttling component; 43, second three-way valve; 44, evaporator; 45, second throttling component; 46, ejector; 47, second gas-liquid separator; 48, second heat exchange flow path. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0032] Reference Figure 1 , which is a structure schematic view of a refrigerating system 100 for an air conditioner provided in the embodiment of the present application. Specifically, the refrigerating system 100 comprises compressor components, a condenser component 20 and an intermediate heat exchanger component. The compressor components comprise a high-pressure compressor 11 and a low-pressure compressor 12; a first gas-liquid separator 13 is connected between a first exhaust port 121 of the low-pressure compressor 12 and a second intake port 112 of the high-pressure compressor 11; a second exhaust port 111 of the high-pressure compressor 11 is connected with a first refrigerant input end of the condenser component 20.

[0033] Further, a second refrigerant input end of the intermediate heat exchanger component is connected with a first refrigerant output end 221 of the condenser component 20, and the intermediate heat exchanger component is provided with a second refrigerant output end 312 and a third refrigerant output end 311; the second refrigerant output end 312 is connected with a first intake port 122 of the low-pressure compressor 12 through a first refrigerant flow path 33; the third refrigerant output end 311 is connected with the first gas-liquid separator 13 through a second refrigerant flow path 32; wherein the refrigerant is sequentially subjected to heat exchange with the condenser component 20 and the intermediate heat exchanger component.

[0034] Specifically, by adding an intermediate heat exchanger component to the first refrigerant output end 221 of the condenser component 20, the refrigerant passing through the condenser component 20 is further heat exchanged by the intermediate heat exchanger component, thereby improving the overall heat exchange efficiency of the refrigeration system 100. In addition, in combination with the series connection between the high-pressure compressor 11 and the low-pressure compressor 12, to avoid the exhaust pressure of the low-pressure compressor 12 being directly input into the high-pressure compressor 11, causing damage to the body of the high-pressure compressor 11, the refrigerant after heat exchange by the intermediate heat exchanger component is introduced into the first gas-liquid separator 13 through the second refrigerant flow path 32, and mixed with the high-temperature and high-pressure gaseous refrigerant output by the low-pressure compressor 12 in the first gas-liquid separator 13, thereby reducing the temperature and pressure of the mixed refrigerant, ensuring that the temperature and pressure of the refrigerant input into the high-pressure compressor 11 meet the safety threshold requirements of the high-pressure compressor 11, and further ensuring the safe and stable operation of the refrigeration system 100.

[0035] Preferably, the intermediate heat exchanger component comprises a first three-way valve 41, an intermediate heat exchanger 31, and a first throttling device 42; the first three-way valve 41 is provided with a first port one, a second port one, and a third port one, and the first port one is connected with the first refrigerant output end 221; a first intermediate flow path 34 is connected between the refrigerant input end one of the intermediate heat exchanger 31 and the second port one, and a second intermediate flow path 35 is connected between the refrigerant input end two of the intermediate heat exchanger 31 and the third port one; the first intermediate flow path 34 connects the first refrigerant flow path 33 with the second refrigerant output end 312, and the second intermediate flow path 35 connects the second refrigerant flow path 32 with the third refrigerant output end 311; wherein the first throttling device 42 is arranged in the second intermediate flow path 35.

[0036] Specifically, by adjusting the first throttling device 42, the temperature and pressure of the refrigerant input into the intermediate heat exchanger 31 are adjusted, and then the temperature difference of the refrigerant input into the intermediate heat exchanger 31 through the first intermediate flow path 34 and the second intermediate flow path 35 is utilized to realize the heat exchange effect of the intermediate heat exchanger 31, thereby recovering the heat of the refrigerant input into the condenser component 20.

[0037] Preferably, the first refrigerant flow path 33 is provided with a second three-way valve 43, an evaporator component, and an ejector 46; the second three-way valve 43 is provided with a first port two, a second port two, and a third port two; the first port two is connected with the second refrigerant output end 312; the second port two is connected with the third refrigerant input end of the evaporator component; the fourth refrigerant output end of the evaporator component and the third port two are respectively connected to the input end of the ejector 46, and the output end of the ejector 46 is connected with the first gas inlet 122 through the second gas-liquid separator 47. By arranging the ejector 46, the specific surface area of the high-pressure refrigerant during the evaporation process is increased, thereby improving the efficiency of the evaporation process, and the ejector is used instead of the throttling device to recover the expansion work and reduce the throttling loss.

[0038] Preferably, the evaporator component comprises a second heat exchange flow path 48, an evaporator 44 and a second throttling device 45. The second heat exchange flow path 48 is connected between the second port two and the input end; the evaporator 44 is connected to the second heat exchange flow path 48; and the second throttling device 45 is arranged in the second heat exchange flow path 48 and located between the evaporator 44 and the second port two.

[0039] Specifically, by arranging the second throttling device 45, the evaporation efficiency of the evaporator 44 is effectively ensured. Specifically, by adjusting the second throttling device 45, the temperature and pressure of the refrigerant input into the evaporator 44 are adjusted, so that the evaporator 44 can fully exchange heat with the indoor environment during the evaporation heat absorption process, and the user's use experience is improved.

[0040] Preferably, the first throttling device 42 and / or the second throttling device 45 is an expansion valve.

[0041] Preferably, the ejector 46 comprises a nozzle, a convergent pipe, a mixing chamber and a diffuser pipe which are in communication with each other. The nozzle is connected to the second heat exchange flow path 48 and used to guide the refrigerant transmitted by the second heat exchange flow path 48 to the mixing chamber through the convergent pipe. The nozzle is also connected to the third port two. The diffuser pipe is connected to the second gas-liquid separator 47, and a refrigerant loop is arranged between the diffuser pipe and the second gas-liquid separator 47.

[0042] Preferably, the condenser component 20 comprises a first heat exchange flow path 21, a condenser 22 and a liquid accumulator 23. The first heat exchange flow path 21 is connected between the second exhaust port 111 and the intermediate heat exchanger component; the condenser 22 is connected to the first heat exchange flow path 21; and the liquid accumulator 23 is arranged in the first heat exchange flow path 21 and located between the condenser 22 and the intermediate heat exchanger component. Specifically, by arranging the liquid accumulator 23, the state of the refrigerant output by the condenser 22 is adjusted and stabilized.

[0043] Preferably, the refrigerant parameter value of the refrigerant after the heat interaction with the intermediate heat exchanger component is defined as a first refrigerant parameter value, and the refrigerant parameter value of the refrigerant output by the low-pressure compressor 12 is defined as a second refrigerant parameter value. The first refrigerant parameter value is smaller than the second refrigerant parameter value, and the refrigerant parameter value includes the refrigerant temperature and the refrigerant pressure. Further adjustment of the pressure of the refrigerant input into the high-pressure compressor 11 is achieved, i.e., the pressure is ensured to be smaller than the exhaust pressure of the low-pressure compressor 12, so that the damage to the body of the high-pressure compressor 11 caused by the direct introduction of the exhaust pressure of the low-pressure compressor 12 into the high-pressure compressor 11 is effectively avoided.

[0044] In a specific example, the nozzle can be denoted as A, the convergent pipe can be denoted as B, the mixing chamber can be denoted as C, and the diffuser pipe can be denoted as D. The following will describe the circulation of the refrigerant in the refrigeration system 100 in detail:

[0045] During the operation of the refrigeration system 100, first, the second gas-liquid separator 47 separates the gas in the refrigerant and sends it to the first suction port of the low-pressure compressor 12 to enter the compression stage. In the low-pressure compressor 12, the refrigerant is compressed, and the temperature and pressure are increased. The compressed high-temperature and high-pressure refrigerant gas is mixed with the refrigerant after heat exchange through the intermediate heat exchanger 31, so as to reduce the exhaust temperature. Subsequently, the mixed gas enters the second suction port of the high-pressure compressor 11 through the first gas-liquid separator 13. The high-pressure compressor 11 further compresses the refrigerant to a high-temperature and high-pressure state. The compressed refrigerant gas enters the condenser 22 to be condensed and heat-released, and is converted into liquid refrigerant, and the temperature is reduced to a medium-temperature and medium-pressure, and then flows into the liquid accumulator 23 to adjust and stabilize the state of the refrigerant. The liquid refrigerant passing through the liquid accumulator 23 is divided into two flow paths of the first intermediate flow path 34 and the second intermediate flow path 35 by the first three-way valve 41: the first intermediate flow path 34 directly enters the intermediate heat exchanger 31, and the second intermediate flow path 35 passes through the first throttling device 42 to be throttled and cooled, and then enters the intermediate heat exchanger 31 to form a heat exchange temperature difference with the first intermediate flow path 34 to recover the condensation heat. The cooled refrigerant flows into the first gas-liquid separator 13 through the second refrigerant flow path 32 again.

[0046] Further, after heat exchange through the intermediate heat exchanger 31, the first refrigerant flow path 33 flows through the second three-way valve 43 and is divided into two flow paths again: the first flow path (driving fluid) directly enters the nozzle A of the ejector 46, and the jet flow enters the mixing chamber C through the nozzle A and the contraction pipe B, the flow rate is increased, and the static pressure is reduced. The second flow path passes through the second throttling device 45 to be throttled and cooled, and is converted into liquid refrigerant, and then enters the evaporator 44 to be evaporated and heat-absorbed, and is converted into gaseous refrigerant. Due to the low pressure generated by the nozzle A, the gaseous refrigerant is introduced into the mixing chamber C by the ejector 46, and is fully mixed and heat-exchanged with the driving fluid. The mixed refrigerant passes through the diffuser pipe D of the ejector 46, the flow rate is reduced, and the static pressure is increased, and finally returns to the second gas-liquid separator 47. Through the above process, the refrigerant continuously circulates in the system to form an efficient refrigeration cycle system, and realizes efficient and flexible refrigeration capacity in a complex environment, and meets the diversified needs of the use place.

[0047] On the other hand, the utility model embodiment still provides a kind of air conditioner, and corresponding, in the present embodiment, it can realize the technical effect corresponding to any of the technical solutions in the above embodiment, which will not be repeated here.

[0048] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the utility model, can make various changes and modifications, therefore the protective scope of the utility model should be limited by the range defined in claim.

Claims

1. A refrigeration system for an air conditioner, characterized by, Comprise: A press component, comprising a high-pressure compressor (11) and a low-pressure compressor (12); A first gas-liquid separator (13) is connected between a first exhaust port (121) of the low-pressure compressor (12) and a second gas inlet (112) of the high-pressure compressor (11); a second exhaust port (111) of the high-pressure compressor (11) is connected with a first refrigerant input end of a condenser component (20); An intermediate heat exchanger component, a second refrigerant input end of the intermediate heat exchanger component is connected with a first refrigerant output end (221) of the condenser component (20), and the intermediate heat exchanger component is provided with a second refrigerant output end (312) and a third refrigerant output end (311); The second refrigerant output end (312) is connected with a first gas inlet (122) of the low-pressure compressor (12) through a first refrigerant flow path (33); the third refrigerant output end (311) is connected with the first gas-liquid separator (13) through a second refrigerant flow path (32); Wherein, the refrigerant is sequentially exchanged with the condenser component (20) and the intermediate heat exchanger component.

2. The refrigeration system according to claim 1, wherein The intermediate heat exchanger component comprises a first three-way valve (41), an intermediate heat exchanger (31) and a first throttling device (42); The first three-way valve (41) is provided with a first port one, a second port one and a third port one, and the first port one is connected with the first refrigerant output end (221); A first intermediate flow path (34) is connected between a refrigerant input end one of the intermediate heat exchanger (31) and the second port one, and a second intermediate flow path (35) is connected between a refrigerant input end two of the intermediate heat exchanger (31) and the third port one; The first intermediate flow path (34) connects the first refrigerant flow path (33) through the second refrigerant output end (312), and the second intermediate flow path (35) connects the second refrigerant flow path (32) through the third refrigerant output end (311); Wherein, the first throttling device (42) is arranged in the second intermediate flow path (35).

3. The refrigeration system according to claim 2, wherein The first refrigerant flow path (33) is provided with a second three-way valve (43), an evaporator component and an ejector (46); The second three-way valve (43) is provided with a first port two, a second port two and a third port two; the first port two is connected with the second refrigerant output end (312); The second port two is connected with a third refrigerant input end of the evaporator component; A fourth refrigerant output end of the evaporator component and the third port two are respectively connected to an input end of the ejector (46), and an output end of the ejector (46) is connected with the first gas inlet (122) through a second gas-liquid separator (47).

4. The refrigeration system according to claim 3, wherein The evaporator component comprises: A second heat exchange flow path (48) connected between the second port two and the input end; an evaporator (44) connected to the second heat exchange flow path (48); a second throttling device (45) disposed in the second heat exchange flow path (48) and located between the evaporator (44) and the second port.

5. The refrigeration system according to claim 4, wherein the first throttling device (42) and / or the second throttling device (45) is an expansion valve.

6. The refrigeration system according to claim 4, wherein the ejector (46) comprises a nozzle, a convergent pipe, a mixing chamber and a divergent pipe which are in communication with each other; the nozzle is connected to the second heat exchange flow path (48) for guiding the refrigerant transmitted by the second heat exchange flow path (48) to the mixing chamber through the convergent pipe, and the nozzle is also connected to the third port two; a refrigerant loop is connected between the divergent pipe and the second gas-liquid separator (47).

7. The refrigeration system according to any one of claims 1-6, wherein the condenser component (20) comprises: a first heat exchange flow path (21) connected between the second exhaust port (111) and the intermediate heat exchanger component; a condenser (22) connected to the first heat exchange flow path (21); a liquid accumulator (23) disposed in the first heat exchange flow path (21) and located between the condenser (22) and the intermediate heat exchanger component.

8. The refrigeration system according to any one of claims 1-6, wherein a first refrigerant parameter value of the refrigerant after the heat exchange with the intermediate heat exchanger component is defined, and a second refrigerant parameter value of the refrigerant output by the low-pressure compressor (12) is defined; wherein the first refrigerant parameter value is less than the second refrigerant parameter value, and the refrigerant parameter value includes refrigerant temperature and refrigerant pressure.

9. An air conditioner characterized by comprising: including: the refrigeration system according to any one of claims 1-8.

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