Heat exchanger and air conditioning system

Abstract

The utility model discloses a heat exchanger and an air conditioning system, the heat exchanger comprises a shell, a first separation part and a throttling device, a cavity is formed in the shell, the first separation part divides the cavity into a condensation cavity and a gas-liquid separation cavity, the condensation cavity is configured to condense a gaseous refrigerant into a liquid refrigerant, and the liquid refrigerant is configured to condense the gaseous refrigerant into a liquid refrigerant. The gas-liquid separation cavity is configured to perform gas-liquid separation on a gas-liquid mixed state refrigerant, the separated gaseous refrigerant flows to a compressor gas supplementing opening, and the throttling device is arranged on a connecting pipeline of the condensation cavity and the gas-liquid separation cavity; and the throttling device is configured to throttle the liquid refrigerant from the condensation cavity into a gas-liquid mixed refrigerant supplied to the gas-liquid separation cavity. The economizer is arranged in the shell and tube heat exchanger, the number of unit pressure containers is reduced, the unit cost is reduced, pipeline welding spots are reduced, the unit leakage risk is reduced, and the unit reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a heat exchanger and an air conditioning system. Background Art

[0002] In the field of chillers, such as centrifugal chillers or screw chillers, in order to improve the performance of the unit, a refrigeration system with an external flash economizer and a flooded evaporator is used. Figure 1 The refrigeration system of the chiller includes an evaporator 20, a condenser 30, a compressor 10, a primary throttling device 41, a secondary throttling device 42, an economizer 50 and an electronic control system. Large chillers often use flash tanks as economizers, which are used to guide the intermediate pressure gas generated by the primary throttling flash to the compressor medium pressure gas replenishment port, and at the same time stabilize the liquid refrigerant by expansion refrigeration to improve the refrigeration cycle capacity and efficiency.

[0003] The above scheme has some problems, such as: (1) The flash economizer belongs to the category of pressure vessels and needs to be inspected regularly, which is time-consuming and labor-intensive; (2) The use of an external economizer results in a larger unit size, more pipe welding points, a high risk of refrigerant leakage, and reduced unit reliability.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In response to the problems pointed out in the background technology, the utility model proposes a heat exchanger and an air-conditioning system. The shell and tube heat exchanger has a built-in economizer, which reduces the number of pressure vessels of the unit, reduces the cost of the unit, reduces the number of pipeline welding points, reduces the risk of unit leakage, and improves the reliability of the unit.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] In some embodiments of the present application, a heat exchanger is provided, which is applied to an air conditioning system, and the heat exchanger includes:

[0008] a housing, wherein a cavity is formed;

[0009] a first partition, which is arranged in the cavity, and the first partition divides the cavity into a condensation cavity and a gas-liquid separation cavity, the condensation cavity is configured to condense the gaseous refrigerant into liquid refrigerant, and the gas-liquid separation cavity is configured to perform gas-liquid separation on the gas-liquid mixed refrigerant, and the separated gaseous refrigerant flows to the compressor air supply port;

[0010] A throttling device is provided on the connecting pipeline between the condensing chamber and the gas-liquid separation chamber, and the throttling device is configured to throttle the liquid refrigerant from the condensing chamber into a gas-liquid mixed refrigerant for supplying to the gas-liquid separation chamber.

[0011] The condensing chamber acts as a condenser, the gas-liquid separation chamber acts as an economizer, and the medium-temperature and medium-pressure economizer is built into the heat exchanger, making full use of the axial space of the heat exchanger. The integrated design makes the overall structure compact, which helps to reduce the number of pressure vessels of the unit, reduce the cost of the unit, reduce the number of pipeline welding points, reduce the risk of unit leakage, and improve the reliability of the unit.

[0012] In some embodiments of the present application, a heat exchanger is provided, which is applied to an air conditioning system, and the heat exchanger includes:

[0013] A shell, in which a condensation chamber and a gas-liquid separation chamber are formed, wherein the condensation chamber is configured to condense the gaseous refrigerant into a liquid refrigerant, and the gas-liquid separation chamber is configured to separate the gas-liquid mixed refrigerant into gas and liquid, and the separated gaseous refrigerant flows to the compressor air supply port;

[0014] A connecting pipeline, which is used to connect the condensation chamber with the gas-liquid separation chamber;

[0015] A throttling device is provided on the connecting pipeline, and the throttling device is configured to throttle the liquid refrigerant from the condensing chamber into a gas-liquid mixed refrigerant for supplying to the gas-liquid separation chamber.

[0016] In some embodiments of the present application, an air-conditioning system is provided, including a refrigeration system composed of a compressor, an evaporator, a condenser, and a throttling device, wherein the condenser is the heat exchanger as described above.

[0017] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of a refrigeration system in the prior art;

[0020] Figure 2 is a first schematic diagram of a heat exchanger according to some embodiments;

[0021] Figure 3 for Figure 2 A schematic diagram of the refrigerant flow path of the heat exchanger shown;

[0022] Figure 4 is a second schematic diagram of a heat exchanger according to some embodiments;

[0023] Figure 5 for Figure 4 A schematic diagram of the refrigerant flow path of the heat exchanger shown;

[0024] Figure 6 is a third schematic diagram of a heat exchanger according to some embodiments;

[0025] Figure 7 for Figure 6 A schematic diagram of the refrigerant flow path of the heat exchanger shown;

[0026] Figure 8 is a fourth schematic diagram of a heat exchanger according to some embodiments;

[0027] Fig. 9 for Figure 8 A schematic diagram of the refrigerant flow path of the heat exchanger shown;

[0028] Fig.10 is a fifth schematic diagram of a heat exchanger according to some embodiments;

[0029] Fig.11 for Fig.10 A schematic diagram of the refrigerant flow path of the heat exchanger shown;

[0030] Reference numerals:

[0031] 10. Compressor;

[0032] 20. Evaporator;

[0033] 30. Condenser;

[0034] 41. Primary throttling device; 42. Secondary throttling device;

[0035] 50. Economizer;

[0036] 100, shell; 110, condensation chamber; 111, anti-impact part; 120, gas-liquid separation chamber; 121, first chamber; 122, second chamber; 123, communication port; 130, low-level chamber; 140, liquid equalization part;

[0037] 200, first partition; 210, inclined portion;

[0038] 300, second partition;

[0039] 400, connecting pipeline;

[0040] 500. Liquid level measuring device;

[0041] 600, gas-liquid separator;

[0042] 700, evaporation heat exchange tube;

[0043] 800, condensation heat exchange tube;

[0044] 910, air inlet; 920, air return port; 930, first liquid outlet; 940, second liquid outlet; 950, liquid inlet. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0051] The present application discloses an air conditioning system, which includes a refrigeration system composed of a compressor, an evaporator, a condenser, and a throttling device. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0052] The low-temperature and low-pressure refrigerant enters the compressor, which compresses it into high-temperature and high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0053] The expansion valve expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature and low-pressure refrigerant gas to the compressor. The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioning system can adjust the temperature of the indoor space.

[0054] In the prior art, reference Figure 1 Large chillers often use flash tanks as economizers 50, which are used to guide the intermediate pressure gas generated by a throttling flash to the medium pressure air supply port of the compressor 10, and at the same time stabilize the liquid refrigerant medium by expansion refrigeration to improve the refrigeration cycle capacity and efficiency.

[0055] The above-mentioned prior art solutions have some problems, such as: (1) the flash economizer 50 belongs to the category of pressure vessels and needs to be inspected regularly, which is time-consuming and labor-intensive; (2) the use of an external economizer 50 results in a larger unit size, more pipe welding points, a high risk of refrigerant leakage, and reduced unit reliability.

[0056] In order to solve the above technical problems, this embodiment improves the heat exchanger that acts as a condenser in the air conditioning system. The shell and tube heat exchanger has a built-in economizer, which reduces the number of pressure vessels of the unit, reduces the unit cost, reduces the number of pipe welding points, reduces the risk of unit leakage, and improves the reliability of the unit.

[0057] Specifically, refer to Figure 2 The heat exchanger includes a shell 100. The shell 100 constitutes the outer contour of the heat exchanger. The cross section of the shell 100 is circular or elliptical.

[0058] A hollow cavity is formed in the shell 100, and the refrigerant flows and changes its state in the cavity.

[0059] The heat exchanger includes a first partition 200 , which partitions the cavity into a condensation cavity 110 and a gas-liquid separation cavity 120 .

[0060] The condensation chamber 110 is configured to condense the gaseous refrigerant into liquid refrigerant. A condensation heat exchange tube 800 is arranged in the condensation chamber 110. An air inlet 910 is arranged on the shell 100, and the air inlet 910 is connected to the condensation chamber 110. The high-temperature and high-pressure gaseous refrigerant flows into the condensation chamber 110 through the air inlet 910, and its heat is taken away by the condensation heat exchange tube 800 and condensed into a high-pressure liquid refrigerant.

[0061] The anti-collision part 111 is arranged in the condensing chamber 110, and is arranged directly opposite to the air inlet 910. The gaseous refrigerant flowing in from the air inlet 910 first flows through the anti-collision part 111, and then flows to the area of ​​the condensing heat exchanger tube. The anti-collision part 111 plays a buffering role for the inflowing gaseous refrigerant.

[0062] The gas-liquid separation chamber 120 is configured to separate the gas-liquid mixed refrigerant into gas and liquid. The refrigerant of the gas-liquid separation chamber 120 comes from the condensing chamber 110 .

[0063] The first partition 200 has a heat insulation function to prevent heat exchange between the condensation chamber 110 and the gas-liquid separation chamber 120 from affecting the state of the refrigerants in the two chambers.

[0064] The condensation chamber 110 and the gas-liquid separation chamber 120 extend along the axial direction of the chamber, making full use of the internal space of the shell 100 .

[0065] The condensing chamber 110 is connected to the gas-liquid separation chamber 120 via a connecting pipe 400, and the connecting pipe 400 is located outside the housing 100. The housing 100 is provided with a liquid outlet (referred to as a first liquid outlet 930) and a liquid inlet 950, the first liquid outlet 930 is communicated with the condensing chamber 110, and the liquid inlet 950 is communicated with the gas-liquid separation chamber 120. One end of the connecting pipe 400 is connected to the first liquid outlet 930, and the other end is connected to the liquid inlet 950.

[0066] The heat exchanger includes a throttling device, which is referred to as a primary throttling device 41, which is disposed on the connecting pipe 400. The primary throttling device 41 is configured to throttle the liquid refrigerant from the condensing chamber 110 into a gas-liquid mixed refrigerant for supplying to the gas-liquid separation chamber 120.

[0067] The liquid refrigerant in the condensing chamber 110 flows into the connecting pipeline 400 through the first liquid outlet 930, and is throttled into a medium-pressure gas-liquid mixed refrigerant after flowing through the first-level throttling device 41. The gas-liquid mixed refrigerant flows into the gas-liquid separation chamber 120 through the liquid inlet 950, and gas-liquid separation is realized in the gas-liquid separation chamber 120 to obtain gaseous refrigerant and liquid refrigerant.

[0068] The gaseous refrigerant obtained by gas-liquid separation flows to the air supply port of the compressor 10 , and the liquid refrigerant obtained leaves the heat exchanger through the second liquid outlet 940 provided on the shell 100 .

[0069] The refrigerant flow process of the heat exchanger is as follows Figure 3 As shown, high-temperature and high-pressure gaseous refrigerant flows into the condensing chamber 110 through the air inlet 910, and its heat is taken away by the condensing heat exchange tube 800 and condensed into high-pressure liquid refrigerant; the high-pressure liquid refrigerant flows into the connecting pipeline 400 through the first liquid outlet 930, and after flowing through the first-level throttling device 41, it is throttled into a medium-pressure gas-liquid mixed refrigerant; the gas-liquid mixed refrigerant flows into the gas-liquid separation chamber 120 through the liquid inlet 950, and gas-liquid separation is realized in the gas-liquid separation chamber 120 to obtain gaseous refrigerant and liquid refrigerant; the gaseous refrigerant obtained by gas-liquid separation flows to the air supply port of the compressor 10, and the obtained liquid refrigerant leaves the heat exchanger through the second liquid outlet 940.

[0070] The condensation chamber 110 acts as a condenser, and the gas-liquid separation chamber 120 acts as an economizer. The medium-temperature and medium-pressure economizer is built into the heat exchanger, making full use of the axial space of the heat exchanger. The integrated design makes the overall structure compact, which helps to reduce the number of pressure vessels of the unit, reduce the cost of the unit, reduce pipeline welding points, reduce the risk of unit leakage, and improve the reliability of the unit.

[0071] In some embodiments, the air inlet 910 is communicated with a high position of the condensation chamber 110 . The air inlet 910 is placed high to prevent the liquid refrigerant condensed in the condensation chamber 110 from flowing out through the air inlet 910 .

[0072] The first liquid outlet 930 is communicated with the lower position of the condensing chamber 110 . The first liquid outlet 930 is placed low, which is beneficial for the liquid refrigerant in the condensing chamber 110 to flow out through the first liquid outlet 930 .

[0073] In some embodiments, the return air port 920 is connected to the high position of the gas-liquid separation chamber 120. The high position of the return air port 920 is conducive to the gaseous refrigerant in the gas-liquid separator 600 cavity flowing out through the return air port 920, and can also prevent the liquid refrigerant in the gas-liquid separation chamber 120 from flowing out through the return air port 920.

[0074] The liquid inlet 950 is communicated with the lower position of the gas-liquid separation chamber 120 , and the liquid inlet 950 is far away from the gas return port 920 , so as to avoid interference between the gaseous refrigerant and the liquid refrigerant in the gas-liquid separation chamber 120 .

[0075] The second liquid outlet 940 is communicated with the lower position of the gas-liquid separation chamber 120 . The second liquid outlet 940 is placed low, which is beneficial for the liquid refrigerant in the gas-liquid separation chamber 120 to flow out through the second liquid outlet 940 .

[0076] In some embodiments, reference Figure 2 The first partition 200 divides the cavity into a condensation chamber 110 and the gas-liquid separation chamber 120 which are arranged vertically, and the condensation chamber 110 is located above the gas-liquid separation chamber 120 .

[0077] A second partition 300 is disposed in the gas-liquid separation chamber 120 . The second partition 300 divides the gas-liquid separation chamber 120 into a first chamber 121 and a second chamber 122 . A communication port 123 is defined between the first chamber 121 and the second chamber 122 .

[0078] The first chamber 121 is connected to the condensing chamber 110 through the connecting pipe 400 , and the gaseous refrigerant in the first chamber 121 enters the second chamber 122 through the connecting port 123 , and the gaseous refrigerant in the second chamber 122 flows to the air supply port of the compressor 10 .

[0079] Combination Figure 3The refrigerant flow process is as follows: the high-temperature and high-pressure gaseous refrigerant flows into the condensing chamber 110 through the air inlet 910, and its heat is taken away by the condensing heat exchange tube 800, condensing into high-pressure liquid refrigerant, and the liquid refrigerant gathers at the bottom of the condensing chamber 110 and falls onto the first partition 200; the high-pressure liquid refrigerant flows into the connecting pipeline 400 through the first liquid outlet 930 at the bottom, and after flowing through the primary throttling device 41, it is throttled into a medium-pressure gas-liquid mixed refrigerant; the gas-liquid mixed refrigerant flows into the connecting pipeline 400 through the first liquid outlet 930 at the bottom, and is throttled into a medium-pressure gas-liquid mixed refrigerant after flowing through the primary throttling device 41; the gas-liquid mixed refrigerant flows into the condensing chamber 110 through the liquid inlet 950 It flows into the first chamber 121, which is a medium-pressure chamber. In the first chamber 121, the gas-liquid mixed refrigerant is separated into gas and liquid, and the separated liquid refrigerant is collected at the bottom of the first chamber 121, and flows out through the second liquid outlet 940 at the bottom. The separated gaseous refrigerant flows to the top of the first chamber 121, and then flows into the second chamber 122 through the connecting port 123; the second chamber 122 is a medium-pressure chamber, and the gaseous refrigerant in the second chamber 122 flows to the air supply port of the compressor 10 through the return air port 920.

[0080] The gas-liquid separation chamber 120 is divided into a first chamber 121 and a second chamber 122 by the second partition 300. The gas-liquid mixed refrigerant mainly completes gas-liquid separation in the first chamber 121, and the second chamber 122 plays a buffering role for the gaseous refrigerant. If a small amount of liquid refrigerant is carried in the gaseous refrigerant, further gas-liquid separation can be carried out in the second chamber 122 to prevent the medium-pressure return gas from carrying liquid.

[0081] In some embodiments, the second partition 300 is vertically arranged, and the second partition 300 divides the gas-liquid separation chamber 120 into a first chamber 121 and a second chamber 122 arranged on the left and right. The first chamber 121 and the second chamber 122 extend along the axial direction of the shell 100 to fully utilize the internal space of the shell 100.

[0082] In some embodiments, reference Figure 4 A gas-liquid separator 600 is disposed at the communication port 123 , and the refrigerant in the first chamber 121 enters the second chamber 122 through the gas-liquid separator 600 .

[0083] Combination Figure 5 The gaseous refrigerant in the first chamber 121 flows into the second chamber 122 through the gas-liquid separator 600, and further prevents the liquid refrigerant in the first chamber 121 from flowing into the second chamber 122, effectively preventing the medium-pressure return gas from carrying liquid.

[0084] In some embodiments, an evaporative heat exchange unit is disposed in the second chamber 122 .

[0085] exist Figure 4 In the specific embodiment shown, the first chamber 121 and the second chamber 122 are arranged on the left and right, and the evaporation heat exchange part is arranged at the bottom of the second chamber 122. The evaporation heat exchange part is an evaporation heat exchange tube 700.

[0086] The gaseous refrigerant in the second chamber 122 can further evaporate the small amount of liquid refrigerant carried into gaseous state under the action of the evaporative heat exchange part, thereby effectively preventing the medium-pressure return gas from carrying liquid.

[0087] Figure 5 The refrigerant flow process of the heat exchanger shown is as follows: the high-temperature and high-pressure gaseous refrigerant flows into the condensing chamber 110 through the air inlet 910, and its heat is taken away by the condensing heat exchange tube 800, condensing into high-pressure liquid refrigerant, and the liquid refrigerant gathers at the bottom of the condensing chamber 110 and falls onto the first partition 200; the high-pressure liquid refrigerant flows into the connecting pipeline 400 through the bottom-placed first liquid outlet 930, and after flowing through the primary throttling device 41, it is throttled into a medium-pressure gas-liquid mixed refrigerant; the gas-liquid mixed refrigerant flows into the medium-pressure first chamber 121 through the liquid inlet 950, In the first chamber 121, the gas-liquid mixed refrigerant is separated into gas and liquid, and the separated liquid refrigerant is collected at the bottom of the first chamber 121 and flows out through the second liquid outlet 940 at the bottom. The separated gaseous refrigerant flows to the top of the first chamber 121, and then flows into the medium-pressure second chamber 122 after further gas-liquid separation through the gas-liquid separator 600; the gaseous refrigerant in the second chamber 122 is further evaporated into gas by the action of the evaporative heat exchange part by the small amount of liquid refrigerant carried, and the gaseous refrigerant flows to the air supply port of the compressor 10 through the return air port 920.

[0088] In some embodiments, reference Figure 4 The first partition 200 is arranged horizontally, and an inclined portion 210 is arranged at a position of the first partition 200 near the first liquid outlet 930. The inclined portion 210 is inclined downward from the first partition 200 to the inner wall of the shell 100, and a low-level cavity 130 is formed between the inclined portion 210 and the shell 100, and the first liquid outlet 930 is connected to the low-level cavity 130.

[0089] The liquid refrigerant collected on the first partition 200 flows toward the low-position cavity 130 under the action of the inclined portion 210 , so as to flow out through the first liquid outlet 930 .

[0090] In some embodiments, reference Figure 8 The first partition 200 divides the cavity into a condensation chamber 110 and a gas-liquid separation chamber 120 arranged on the left and right.

[0091] The air return port 920 is connected to the upper space of the gas-liquid separation chamber 120, and the second liquid outlet 940 is connected to the lower position of the gas-liquid separation chamber 120. The air inlet 910 is connected to the upper space of the condensation chamber 110, and the first liquid outlet 930 is connected to the lower position of the condensation chamber 110.

[0092] Combination Fig. 9The flow process of the refrigerant is as follows: the high-temperature and high-pressure gaseous refrigerant flows into the condensing chamber 110 through the air inlet 910, and its heat is taken away by the condensing heat exchange tube 800, condensed into high-pressure liquid refrigerant, and the liquid refrigerant gathers at the bottom of the condensing chamber 110; the liquid refrigerant flows into the connecting pipeline 400 through the bottom-placed first liquid outlet 930, and after flowing through the primary throttling device 41, it is throttled into a medium-pressure gas-liquid mixed refrigerant; the gas-liquid mixed refrigerant flows into the gas-liquid separation chamber 120 through the liquid inlet 950, and gas-liquid separation is achieved in the gas-liquid separation chamber 120 to obtain gaseous refrigerant and liquid refrigerant; the separated gaseous refrigerant flows to the top of the gas-liquid separation chamber 120, and flows to the air supply port of the compressor 10 through the return air port 920; the separated liquid refrigerant gathers at the bottom of the gas-liquid separation chamber 120, and flows out through the bottom-placed second liquid outlet 940.

[0093] In some embodiments, reference Fig.10 The first partition 200 divides the cavity into a condensation chamber 110 and a gas-liquid separation chamber 120 which are arranged obliquely. The condensation chamber 110 is located obliquely above the gas-liquid separation chamber 120 .

[0094] The air return port 920 is connected to the upper space of the gas-liquid separation chamber 120, and the second liquid outlet 940 is connected to the lower position of the gas-liquid separation chamber 120. The air inlet 910 is connected to the upper space of the condensation chamber 110, and the first liquid outlet 930 is connected to the lower position of the condensation chamber 110.

[0095] Combination Fig.11 The flow process of the refrigerant is as follows: the high-temperature and high-pressure gaseous refrigerant flows into the condensing chamber 110 through the air inlet 910, and its heat is taken away by the condensing heat exchange tube 800, condensed into high-pressure liquid refrigerant, and the liquid refrigerant gathers at the bottom of the condensing chamber 110; the liquid refrigerant flows into the connecting pipeline 400 through the bottom-placed first liquid outlet 930, and after flowing through the primary throttling device 41, it is throttled into a medium-pressure gas-liquid mixed refrigerant; the gas-liquid mixed refrigerant flows into the gas-liquid separation chamber 120 through the liquid inlet 950, and gas-liquid separation is achieved in the gas-liquid separation chamber 120 to obtain gaseous refrigerant and liquid refrigerant; the separated gaseous refrigerant flows to the top of the gas-liquid separation chamber 120, and flows to the air supply port of the compressor 10 through the return air port 920; the separated liquid refrigerant gathers at the bottom of the gas-liquid separation chamber 120, and flows out through the bottom-placed second liquid outlet 940.

[0096] In some embodiments, reference Figures 6 to 11 The heat exchanger includes a liquid level measuring device 500, which is configured to measure the liquid level of the liquid refrigerant in the gas-liquid separation chamber 120. The liquid level height is controlled by adjusting the refrigerant flow rate of the primary throttling device 41.

[0097] The liquid level measuring device 500 is located outside the housing 100 . The location of the liquid level measuring device 500 does not occupy additional internal space of the housing 100 , which facilitates installation and maintenance of the liquid level measuring device 500 .

[0098] exist Figure 6 In the heat exchanger shown, the gas-liquid mixed refrigerant is separated into gas and liquid in the first chamber 121 , and the liquid level measuring device 500 is used to measure the liquid state of the liquid refrigerant in the first chamber 121 .

[0099] exist Figure 8 and Fig. 9 In the heat exchanger shown, the gas-liquid mixed refrigerant is separated into gas and liquid in the gas-liquid separation chamber 120 , and the liquid level measuring device 500 is used to measure the liquid state of the liquid refrigerant in the gas-liquid separation chamber 120 .

[0100] In some embodiments, reference Figure 6 A liquid inlet 950 is provided on the shell 100 , and the gas-liquid mixed refrigerant after throttling by the primary throttling device 41 enters the gas-liquid separation chamber 120 through the liquid inlet 950 .

[0101] A liquid equalizing portion 140 is disposed in the gas-liquid separation chamber 120 , and the liquid equalizing portion 140 is configured to equalize the flow of the gas-liquid mixed refrigerant flowing in from the liquid inlet 950 .

[0102] The liquid equalizing portion 140 is a plate structure of a bent or arc-shaped shape, and a plurality of liquid equalizing holes are arranged on the plate structure. The plate structure is directly opposite to the liquid inlet 950. After the gas-liquid mixed refrigerant in the connecting pipeline 400 flows in through the liquid inlet 950, it is evenly flowed through the liquid equalizing portion 140, and then flows into the gas-liquid separation chamber 120, thereby improving the distribution uniformity of the refrigerant in the gas-liquid separation chamber 120, which helps to improve the gas-liquid separation effect.

[0103] In some embodiments, a heat exchanger is provided for use in an air-conditioning system. The heat exchanger includes a shell 100. A condensation chamber 110 and a gas-liquid separation chamber 120 are formed in the shell 100. The condensation chamber 110 is configured to condense the gaseous refrigerant into a liquid refrigerant. The gas-liquid separation chamber 120 is configured to perform gas-liquid separation on a gas-liquid mixed refrigerant. The separated gaseous refrigerant flows to the air supply port of the compressor 10.

[0104] The heat exchanger includes a connecting pipeline 400 for connecting the condensing chamber 110 with the gas-liquid separation chamber 120 .

[0105] The heat exchanger includes a throttling device, denoted as a primary throttling device 41, which is arranged on the connecting pipeline 400. The primary throttling device 41 is configured to throttle the liquid refrigerant from the condensing chamber 110 into a gas-liquid mixed refrigerant for supplying to the gas-liquid separation chamber 120.

[0106] The high-temperature and high-pressure gaseous refrigerant flows into the condensing chamber 110 and is condensed into a high-pressure liquid refrigerant; the high-pressure liquid refrigerant flows into the connecting pipeline 400, and after passing through the first-level throttling device 41, it is throttled into a medium-pressure gas-liquid mixed refrigerant; the gas-liquid mixed refrigerant flows into the gas-liquid separation chamber 120, and gas-liquid separation is realized in the gas-liquid separation chamber 120 to obtain gas refrigerant and liquid refrigerant; the gaseous refrigerant obtained by gas-liquid separation flows to the air supply port of the compressor 10, and the obtained liquid refrigerant leaves the heat exchanger through the second liquid outlet 940.

[0107] The condensation chamber 110 acts as a condenser, and the gas-liquid separation chamber 120 acts as an economizer. The medium-temperature and medium-pressure economizer is built into the heat exchanger, making full use of the axial space of the heat exchanger. The integrated design makes the overall structure compact, which helps to reduce the number of pressure vessels of the unit, reduce the cost of the unit, reduce pipeline welding points, reduce the risk of unit leakage, and improve the reliability of the unit.

[0108] Final note: Figure 3 , Figure 5 , Figure 7 , Fig. 9 , Fig.11 In the figure, the dotted straight line in the gas-liquid separation chamber 120 represents liquid refrigerant, the hollow arrow represents gaseous refrigerant, and the solid arrow represents liquid refrigerant or gas-liquid mixed refrigerant.

[0109] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0110] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A heat exchanger, applied to an air conditioning system, characterized in that: The heat exchanger comprises: a housing, wherein a cavity is formed; a first partition, which is arranged in the cavity, and the first partition divides the cavity into a condensation cavity and a gas-liquid separation cavity, the condensation cavity is configured to condense the gaseous refrigerant into liquid refrigerant, and the gas-liquid separation cavity is configured to perform gas-liquid separation on the gas-liquid mixed refrigerant, and the separated gaseous refrigerant flows to the compressor air supply port; A throttling device is provided on the connecting pipeline between the condensing chamber and the gas-liquid separation chamber, and the throttling device is configured to throttle the liquid refrigerant from the condensing chamber into a gas-liquid mixed refrigerant for supplying to the gas-liquid separation chamber.

2. The heat exchanger according to claim 1, characterized in that: The first partition divides the cavity into the condensation cavity and the gas-liquid separation cavity which are arranged vertically, and the condensation cavity is located above the gas-liquid separation cavity; A second partition is provided in the gas-liquid separation chamber, the second partition divides the gas-liquid separation chamber into a first chamber and a second chamber, and a communication port is provided between the first chamber and the second chamber; The first chamber is connected to the condensing chamber through the connecting pipeline, the gaseous refrigerant in the first chamber enters the second chamber through the connecting port, and the gaseous refrigerant in the second chamber flows to the compressor air supply port.

3. The heat exchanger according to claim 2, characterized in that: A gas-liquid separator is arranged at the communication port, and the refrigerant in the first cavity enters the second cavity through the gas-liquid separator.

4. The heat exchanger according to claim 2, characterized in that: An evaporation heat exchange part is arranged in the second chamber.

5. The heat exchanger according to claim 1, characterized in that: The first partition divides the cavity into the condensation chamber and the gas-liquid separation chamber arranged on the left and right. The shell is provided with a return air port and a liquid outlet. The return air port is connected to the upper space of the gas-liquid separation chamber, and the liquid outlet is connected to the lower position of the gas-liquid separation chamber.

6. The heat exchanger according to claim 1, characterized in that The first partition divides the cavity into a condensation cavity and a gas-liquid separation cavity which are arranged obliquely, and the condensation cavity is located obliquely above the gas-liquid separation cavity; The shell is provided with an air return port and a liquid outlet, the air return port is communicated with the upper space of the gas-liquid separation chamber, and the liquid outlet is communicated with the lower position of the gas-liquid separation chamber.

7. The heat exchanger according to any one of claims 1 to 6, characterized in that: It also includes a liquid level measuring device, which is configured to measure the liquid level of the liquid refrigerant in the gas-liquid separation chamber.

8. The heat exchanger according to any one of claims 1 to 6, characterized in that: The shell is provided with a liquid inlet, and the gas-liquid mixed refrigerant after throttling by the throttling device enters the gas-liquid separation chamber through the liquid inlet; A liquid equalizing portion is disposed in the gas-liquid separation chamber, and the liquid equalizing portion is configured to equalize the flow of the gas-liquid mixed refrigerant flowing in from the liquid inlet.

9. A heat exchanger, applied to an air conditioning system, characterized in that: The heat exchanger comprises: A shell, in which a condensation chamber and a gas-liquid separation chamber are formed, wherein the condensation chamber is configured to condense the gaseous refrigerant into a liquid refrigerant, and the gas-liquid separation chamber is configured to separate the gas-liquid mixed refrigerant into gas and liquid, and the separated gaseous refrigerant flows to the compressor air supply port; A connecting pipeline, which is used to connect the condensation chamber with the gas-liquid separation chamber; A throttling device is provided on the connecting pipeline, and the throttling device is configured to throttle the liquid refrigerant from the condensing chamber into a gas-liquid mixed refrigerant for supplying to the gas-liquid separation chamber.

10. An air conditioning system, comprising a refrigeration system consisting of a compressor, an evaporator, a condenser, and a throttling device, characterized in that: The condenser is a heat exchanger according to any one of claims 1 to 9.

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