Economizer, compressor assembly and air conditioning system

Abstract

The invention provides an economizer, a compressor assembly and an air conditioning system. The economizer comprises a shell; a separator; a first heat exchanger; a second heat exchanger. According to the economizer, the compressor assembly and the air conditioning system, two air supply areas can be formed by arranging the first air supply cavity and the second air supply cavity, and a throttled air-liquid mixture firstly enters the first air supply cavity to be heated to form the first air supply pressure; when the compressor is connected in series, part of the gas-liquid mixture is throttled again through the liquid passing hole in the partition plate and then enters the second gas supply cavity to be heated to form second gas supply pressure, so that the economizer can provide two kinds of gas supply pressure, and then gas supply can be conducted on different compressors in the compressors connected in series; the problem that in the prior art, only one compressor in the series compressors can be supplied with air is solved, and the energy efficiency of the air conditioning system is improved.

Description

Technical Field

[0001] The invention relates to the technical field of air replenishment, in particular to an economizer, a compressor component and an air conditioning system. Background Art

[0002] In order to achieve energy conservation and emission reduction, many areas in the north currently use water-source heat pump air-conditioning chillers for heating in winter; due to the large difference between the groundwater temperature in winter and the preset heating water temperature, the single compressor of the heat pump air-conditioning chiller cannot achieve a large pressure ratio, so two compressors are usually connected in series; in order to improve the operating energy efficiency of the unit, conventional units generally have economizers to replenish air in the middle pressure area of ​​the compressor; but for water-source heat pump air-conditioning chillers with dual compressors in series, the working pressures of the two compressors are quite different, making it impossible for conventional economizers to replenish air to the two compressors at the same time, resulting in low energy efficiency of the unit. Summary of the invention

[0003] In order to solve the technical problem in the prior art that the economizer cannot simultaneously replenish air to two compressors connected in series, thus affecting the energy efficiency of the unit, an economizer, a compressor assembly and an air-conditioning system are provided which utilize two replenishing air chambers to provide two different replenishing air pressures to improve the energy efficiency of the unit.

[0004] An economizer, comprising:

[0005] case;

[0006] A partition, the partition is arranged in the shell, and the partition divides the interior of the shell into a first air replenishment chamber and a second air replenishment chamber, the first air replenishment chamber is provided with a liquid inlet and a first air replenishment port, the second air replenishment chamber is provided with a liquid outlet and a second air replenishment port, the partition is provided with a liquid hole, and the first air replenishment chamber and the second air replenishment chamber are connected through the liquid hole;

[0007] A first heat exchanger, wherein the first heat exchanger is disposed in the first air supplement cavity and has a first inlet and a first outlet;

[0008] A second heat exchanger, wherein the second heat exchanger is disposed in the second air supplement cavity and has a second inlet and a second outlet;

[0009] The first inlet constitutes a heating inlet of the economizer, the first outlet is connected to the second inlet, and the second outlet constitutes a heating outlet of the economizer;

[0010] The first gas replenishment port can provide a first gas replenishment pressure, and the second gas replenishment port can provide a second gas replenishment pressure, and the first gas replenishment pressure is greater than the second gas replenishment pressure.

[0011] The economizer also includes a third heat exchanger, which is arranged in the first air supplement chamber and below the first heat exchanger. The third heat exchanger has a third inlet and a third outlet. The third inlet is connected to the second outlet, and the third outlet constitutes a heating outlet of the economizer.

[0012] The economizer also includes a fourth heat exchanger, which is arranged in the second air supplement chamber and below the second heat exchanger. The fourth heat exchanger has a fourth inlet and a fourth outlet, the fourth inlet is connected to the second outlet, and the fourth outlet is connected to the third inlet.

[0013] The economizer further includes a first baffle assembly, which is disposed in the first air replenishment cavity, and the first baffle assembly and the inner wall of the first air replenishment cavity together form a first baffle channel, and the liquid inlet is connected to the first air replenishment port through the first baffle channel.

[0014] The first baffle assembly includes a first baffle, which is located on one side of the partition, and the first baffle, the partition and the inner wall of the corresponding first air replenishment cavity together form a first exhaust space, the first heat exchanger is located in the first exhaust space, and the first air replenishment port is connected to the first exhaust space.

[0015] The economizer further includes a first filter structure, which is disposed in the first exhaust space and between the first heat exchanger and the first air supply port.

[0016] The first baffle assembly also includes a second baffle, which is arranged on the side wall of the shell away from the partition, and the second baffle is located above the liquid inlet, and the liquid outlet direction of the liquid inlet points to the bottom of the second baffle.

[0017] The first baffle assembly also includes a third baffle, which is arranged parallel to the partition, and is located between the end of the second baffle close to the partition and the first baffle, and a first air-transmitting distance is formed between the third baffle and the end of the second baffle close to the partition, and a second air-transmitting distance is formed between the third baffle and the first baffle.

[0018] The first baffle assembly further includes a fourth baffle, which is disposed at the lower portion of the third baffle and is located above the liquid level in the first air supplementation chamber.

[0019] The fourth baffle is provided with dripping holes; and / or the fourth baffle is arranged horizontally or inclined relative to the liquid level in the first air supplement cavity.

[0020] The economizer further includes a second baffle assembly, which is disposed in the second air supplementation cavity, and the second baffle assembly is mirror-symmetrical to the first baffle assembly relative to the partition.

[0021] The second baffle assembly includes a fifth baffle, which is located on one side of the partition, and the fifth baffle, the partition and the inner wall of the corresponding second air replenishment cavity together form a second exhaust space, the second heat exchanger is located in the second exhaust space, and the second air replenishment port is connected to the second exhaust space.

[0022] The economizer further includes a second filter structure, which is disposed in the second exhaust space and between the second heat exchanger and the second air supply port.

[0023] The economizer further includes a sixth baffle, the liquid outlet is located on the bottom surface of the second air supplement cavity, the sixth baffle is arranged on the bottom surface of the second air supplement cavity, and the sixth baffle is located between the liquid passage hole and the liquid outlet.

[0024] The first heat exchanger is a fin heat exchanger; and / or the second heat exchanger is a fin heat exchanger.

[0025] A compressor assembly comprises at least two compressors and the above-mentioned economizer, all of the compressors are arranged in series, and at least one of the compressors constitutes the high-pressure part of the compressor assembly, and at least one of the compressors constitutes the low-pressure part of the compressor assembly, the first air supply port is connected to the high-pressure part, and the second air supply port is connected to the low-pressure part.

[0026] An air conditioning system comprises the economizer or the compressor assembly described above.

[0027] The economizer, compressor assembly and air-conditioning system provided by the present invention can form two air-supply areas by setting a first air-supply cavity and a second air-supply cavity. The gas-liquid mixture after throttling will first enter the first air-supply cavity to be heated to form a first air-supply pressure, and part of the gas-liquid mixture will be throttled again through the liquid hole on the partition, and then enter the second air-supply cavity to be heated to form a second air-supply pressure, so that the economizer can provide two air-supply pressures, and then can replenish air for different compressors in the compressors arranged in series, thus overcoming the problem in the prior art that only one compressor in the series compressors can be replenished with air, thereby improving the energy efficiency of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of an economizer provided in an embodiment of the present invention;

[0029] Figure 2 A side view of an economizer provided by an embodiment of the present invention;

[0030] Figure 3 A top view of an economizer provided by an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the structure of a fin heat exchanger provided in an embodiment of the present invention;

[0032] In the figure:

[0033] 1. Shell; 2. Partition; 11. First air replenishment cavity; 12. Second air replenishment cavity; 13. Liquid inlet; 14. First air replenishment port; 15. Liquid outlet; 16. Second air replenishment port; 21. Liquid passage hole; 3. First heat exchanger; 31. First inlet; 32. First outlet; 4. Second heat exchanger; 41. Second inlet; 42. Second outlet; 5. Third heat exchanger; 51. Third inlet; 52. Third outlet; 6. Fourth heat exchanger; 61. Fourth inlet; 62. Fourth outlet; 71. First deflection channel; 72. First baffle; 17. First exhaust space; 81. First filter structure; 73. Second baffle; 74. Third baffle; 75. Fourth baffle; 92. Fifth baffle; 18. Second exhaust space; 82. Second filter structure; 93. Sixth baffle. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" 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 direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In order to achieve energy conservation and emission reduction, many areas in the north currently use water-source heat pump air-conditioning chillers for heating in winter; due to the large difference between the groundwater temperature in winter and the preset heating water temperature, the single compressor of the heat pump air-conditioning chiller cannot achieve a large pressure ratio, so two compressors are usually connected in series; in order to improve the operating energy efficiency of the unit, conventional units generally have economizers to replenish air in the middle pressure area of ​​the compressor; but for water-source heat pump air-conditioning chillers with dual compressors in series, the working pressures of the two compressors are quite different, making it impossible for conventional economizers to replenish air to the two compressors at the same time, resulting in low energy efficiency of the unit.

[0040] To this end, the present application provides a Figures 1 to 4The economizer shown in the figure comprises: a shell 1; a partition 2, the partition 2 is arranged in the shell 1, and the partition 2 divides the interior of the shell 1 into a first air-injection chamber 11 and a second air-injection chamber 12, the first air-injection chamber 11 is provided with a liquid inlet 13 and a first air-injection port 14, the second air-injection chamber 12 is provided with a liquid outlet 15 and a second air-injection port 16, the partition 2 is provided with a liquid hole 21, the first air-injection chamber 11 and the second air-injection chamber 12 are connected through the liquid hole 21; a first heat exchanger 3, the first heat exchanger 3 is arranged in the first air-injection chamber 11, and the first heat exchanger 3 has a first inlet 31 and a first outlet 32, the first inlet 31 and the first outlet 32 ​​are both located outside the shell 1; a second heat exchanger 4, the second heat exchanger 4 is arranged in the second air supply cavity 12, and the second heat exchanger 4 has a second inlet 41 and a second outlet 42, the second inlet 41 and the second outlet 42 are both located outside the shell 1; the first inlet 31 constitutes the heating inlet of the economizer, the first outlet 32 ​​is connected to the second inlet 41, and the second outlet 42 constitutes the heating outlet of the economizer; the first air supply port 14 can provide a first air supply pressure, the second air supply port 16 can provide a second air supply pressure, and the first air supply pressure is greater than the second air supply pressure. By setting the first air replenishment chamber 11 and the second air replenishment chamber 12, two air replenishment areas can be formed. The gas-liquid mixture after throttling will first enter the first air replenishment chamber 11 to be heated to form a first air replenishment pressure, and part of the gas-liquid mixture will be throttled again through the liquid hole 21 on the partition 2, and then enter the second air replenishment chamber 12 to be heated to form a second air replenishment pressure, so that the economizer can provide two air replenishment pressures, and then different compressors in the compressors arranged in series can be replenished with air, which overcomes the problem in the prior art that only one compressor in the series compressor can be replenished with air, thereby improving the energy efficiency of the air-conditioning system.

[0041] When the economizer is used, the refrigerant that has been throttled and flashed is sent into the first air replenishment chamber 11 through the liquid inlet 13. The refrigerant after throttling will form a state of gas-liquid coexistence. When it enters the first air replenishment chamber 11, gas-liquid separation will be performed. At the same time, the refrigerant in the heating inlet and the condenser that has not been throttled are introduced into the first heat exchanger 3. The first heat exchanger 3 can heat the refrigerant in the first air replenishment chamber 11, so that the amount of gaseous refrigerant in the first air replenishment chamber 11 increases to form a first air replenishment pressure. At the same time, the liquid refrigerant in the first air replenishment chamber 11 will enter the second air replenishment chamber 12 through the liquid hole 21 on the partition 2. Since the flow area of ​​the liquid hole 21 is small and the pressure in the first air replenishment chamber 11 is large, the liquid refrigerant will be throttled and flashed again at the liquid hole 21. A state of gas-liquid coexistence is formed, and the temperature of the refrigerant is further reduced. At the same time, the refrigerant passing through the first heat exchanger 3 will flow into the second heat exchanger 4, so that the second heat exchanger 4 can heat the refrigerant in the second air replenishment chamber 12, so that the amount of gas-controlled refrigerant in the second air replenishment chamber 12 increases to form a second air replenishment pressure. Finally, the liquid refrigerant in the second air replenishment chamber 12 that has not been converted into gaseous refrigerant is discharged from the liquid outlet 15, and the refrigerant that has undergone heat exchange with the second heat exchanger 4 is discharged from the second outlet 42, and finally flows into the heat exchange cycle where the economizer is located. At this time, the first air replenishment pressure is higher than the second air replenishment pressure. Therefore, when at least two compressors are used in series, the first air replenishment pressure can replenish air for the compressor with a higher pressure, and the second air replenishment pressure can replenish air for the compressor with a lower pressure.

[0042] In order to further improve the heating effect of the refrigerant in the first air replenishing chamber 11, the economizer further includes: a third heat exchanger 5, the third heat exchanger 5 is arranged in the first air replenishing chamber 11, and the third heat exchanger 5 is located below the first heat exchanger 3, the third heat exchanger 5 has a third inlet 51 and a third outlet 52, the third inlet 51 is connected to the second outlet 42, and the third outlet 52 constitutes the heating outlet of the economizer, and the third heat exchanger 5 is used to further heat the refrigerant in the first air replenishing chamber 11, and at the same time At the same time, the refrigerant that has completed heat exchange in the second heat exchanger 4 is introduced into the third heat exchanger 5 for heating, thereby ensuring the heating effect of the second heat exchanger 4 and also improving the heating effect of the refrigerant in the first air replenishing chamber 11. In particular, the third heat exchanger 5 is arranged below the first heat exchanger 3. At this time, the third heat exchanger 5 is closer to the liquid refrigerant in the first air replenishing chamber 11, and the temperature of the liquid refrigerant is lower. Even if the third heat exchanger 5 obtains refrigerant from the second heat exchanger 4, it can still ensure the heating effect on the liquid refrigerant and improve the replenishing pressure in the first air replenishing chamber 11.

[0043] Furthermore, the economizer further comprises a fourth heat exchanger 6, the fourth heat exchanger 6 is arranged in the second air replenishing chamber 12, and the fourth heat exchanger 6 is located below the second heat exchanger 4, the fourth heat exchanger 6 has a fourth inlet 61 and a fourth outlet 62, the fourth inlet 61 is communicated with the second outlet 42, the fourth outlet 62 is communicated with the third inlet 51, the fourth heat exchanger 6 is used to further heat the refrigerant in the second air replenishing chamber 12, and at the same time, the refrigerant that has completed heat exchange in the second heat exchanger 4 is first introduced into the fourth heat exchanger 6 for heating, and then sent to the fourth heat exchanger 6. The liquid refrigerant is heated in the third heat exchanger 5, which not only ensures the heating effect of the second heat exchanger 4, but also ensures the heating effect of the fourth heat exchanger 6 on the refrigerant in the second air replenishing chamber 12 and the heating effect of the third heat exchanger 5 on the refrigerant in the first air replenishing chamber 11. In particular, the fourth heat exchanger 6 is arranged below the second heat exchanger 4. At this time, the fourth heat exchanger 6 is closer to the liquid refrigerant in the second air replenishing chamber 12, and the temperature of the liquid refrigerant is lower. Even if the fourth heat exchanger 6 obtains refrigerant from the second heat exchanger 4, it can still ensure the heating effect on the liquid refrigerant, thereby increasing the air replenishing pressure in the second air replenishing chamber 12.

[0044] It should be noted that Figure 1 In the figure, the liquid inlet 13, the first inlet 31, the second outlet 42, the third outlet 52 and the fourth inlet 61 are partially cut to facilitate the expression of the specific structure; Figure 2 and Figure 3 In the figure, the numbers in brackets only represent that the projections of the corresponding structures overlap each other in the viewing direction of this figure, and do not mean that the two structures are located at the same position; for example, Figure 2 The 31(42) in FIG. 4 only expresses that the first inlet 31 and the second outlet 42 are at the same height. Figure 3 The 32(51) in the figure only expresses that the first outlet 32 ​​and the third inlet 51 are on the same vertical line.

[0045] The economizer further includes a first baffle assembly, which is disposed in the first air replenishment cavity 11, and the first baffle assembly and the inner wall of the first air replenishment cavity 11 together form a first baffle channel 71, and the liquid inlet 13 is connected to the first air replenishment port 14 through the first baffle channel 71. The first baffle assembly is used to form a baffle channel in the first air replenishment cavity 11, which further increases the gas-liquid separation effect of the gas-liquid refrigerant, and the refrigerant droplets with larger diameters are separated by the baffled flow of the refrigerant, and finally drip to the bottom of the first air replenishment cavity 11, while the gaseous refrigerant can continue to flow along the baffle channel and be heated by the first heat exchanger 3, and finally discharged from the first air replenishment port 14, thereby ensuring the dryness of the refrigerant discharged from the first air replenishment port 14 and improving the air replenishment reliability of the economizer.

[0046] The characteristics of high-temperature heat pump units are that the temperature difference between the condensing temperature and the evaporating temperature is large, and the high-temperature refrigerant flowing out of the condenser needs to flash to lower the temperature. The amount of gaseous refrigerant generated by flash is large, which can easily cause the economizer to be filled with liquid. The first baffle assembly includes a first baffle 72, and the first baffle 72 is located on one side of the partition 2, and the first baffle 72, the partition 2 and the inner wall of the corresponding first air replenishment cavity 11 together form a first exhaust space 17, and the first heat exchanger 3 is located in the first exhaust space 17, and the first air replenishment port 14 is connected to the first exhaust space 17. By utilizing the formed first exhaust space 17, the gaseous refrigerant needs to enter the first exhaust space 17 before it can flow to the first air replenishment port 14. During this flow process, the gaseous refrigerant entrains droplets due to the excessively high flow rate. At this time, the refrigerant droplets entrained in the gaseous refrigerant will be heated by the first heat exchanger 3 and eliminated, thereby eliminating the hidden danger of gas replenishment with liquid.

[0047] The economizer also includes a first filter structure 81, which is arranged in the first exhaust space 17, and the first filter structure 81 is located between the first heat exchanger 3 and the first air supply port 14. The first filter structure 81 is used to further separate the gas-liquid two-phase refrigerant, improve the refrigerant dryness at the first air supply port 14, and improve the air supply reliability of the economizer. At the same time, the flow rate of the gaseous refrigerant can also be controlled by the first baffle assembly. To ensure the separation efficiency, the flow rate of the gaseous refrigerant passing through the gas-liquid filter is V≤2.0m / s and V≥0.2m / s, preferably 0.7m / s. If the flow rate is too high, the first filter cannot absorb the droplets; if the flow rate is too low, the gas entrained droplets bypass the first filter, and no collision separation occurs. For this reason, the flow rate of the gaseous refrigerant in the baffle flow channel is controlled within 3m / s. If the flow rate is too high, the gaseous refrigerant entrained droplets will also collide violently with the inner wall of the shell 1, forming more dispersed small droplets, increasing the difficulty of filtering by the first filter.

[0048] The first baffle assembly also includes a second baffle 73, which is arranged on the side wall of the shell 1 away from the partition 2, and the second baffle 73 is located above the liquid inlet 13, and the liquid outlet direction of the liquid inlet 13 points to the bottom of the second baffle 73. The second baffle 73 is used to block the gas-liquid two-phase refrigerant fed into the liquid inlet 13, forcing the gas-liquid two-phase refrigerant to be deflected, thereby realizing the separation of gaseous refrigerant and liquid refrigerant. The gaseous refrigerant can bypass the second baffle 73 and flow upward, while the liquid refrigerant is blocked by the second baffle 73 and flows to the bottom of the first air replenishment cavity 11, reducing the content of liquid refrigerant in the gaseous refrigerant, facilitating the heating of the gaseous refrigerant by the first heat exchanger 3, thereby ensuring the air replenishment reliability of the economizer.

[0049] The first baffle assembly also includes a third baffle 74, which is arranged parallel to the partition 2. The third baffle 74 is located between the end of the second baffle 73 close to the partition 2 and the first baffle 72. A first air-passing distance is formed between the third baffle 74 and the end of the second baffle 73 close to the partition 2, and a second air-passing distance is formed between the third baffle 74 and the first baffle 72. The third baffle 74 is used to further increase the refrigerant's deflection path and the number of deflections, thereby improving the gas-liquid separation effect of the refrigerant. The first air-passing distance and the second air-passing distance can ensure the reliable flow of the refrigerant. Preferably, the third baffle 74 is vertically arranged, and the upper end and the lower end of the third baffle 74 are both spaced apart from the corresponding side wall of the first air replenishing cavity 11. The refrigerant flows to the first exhaust space 17 through the first air-transmitting spacing, the spacing between the upper end of the third baffle 74 and the side wall of the first air replenishing cavity 11, and the second air-transmitting spacing in sequence. The spacing between the lower end of the third baffle 74 and the side wall of the first air replenishing cavity 11 enables the liquid refrigerant to flow directly toward the partition 2, preparing for the refrigerant to flow into the second air replenishing cavity 12, thereby ensuring the working reliability of the economizer.

[0050] The first baffle assembly also includes a fourth baffle 75, which is disposed at the lower portion of the third baffle 74 and is located above the liquid level in the first air replenishment chamber 11. The fourth baffle 75 is used to further limit the flow path of the refrigerant to prevent the gaseous refrigerant from impacting the liquid surface of the liquid refrigerant and entraining the droplets again, thereby ensuring the reliability of the air replenishment of the economizer.

[0051] The fourth baffle 75 is provided with a dripping hole. The refrigerant will generate droplets in the baffle flow channel. After the droplets fall on the fourth baffle 75, they can drip onto the liquid surface of the liquid refrigerant through the dripping hole, thereby avoiding splashing of the liquid refrigerant and ensuring the reliability of the air replenishment of the economizer.

[0052] The fourth baffle 75 is inclined relative to the liquid level in the first air replenishing chamber 11. The inclined fourth baffle 75 is used to transport the droplets dripping onto the fourth baffle 75 to the liquid surface of the liquid refrigerant, thereby avoiding splashing of the liquid refrigerant and ensuring the reliability of air replenishment of the economizer.

[0053] Alternatively, the fourth baffle 75 is arranged horizontally, and at this time, the fourth baffle 75 is parallel to the liquid level in the first air replenishing chamber 11. The fourth baffle 75 does not have a lowest point to affect the allowable height of the liquid level, thereby increasing the storage capacity of the liquid refrigerant, reducing the volume of the economizer, and reducing space occupancy.

[0054] The economizer also includes a second baffle assembly, which is arranged in the second air replenishment chamber 12, and the second baffle assembly is mirror-symmetrical with the first baffle assembly relative to the partition 2. The second baffle assembly is used to form a deflection flow channel in the second air replenishment chamber 12, so that the gas-liquid two-phase refrigerant throttled and flashed through the liquid hole 21 can be reliably separated, thereby improving the dryness of the gaseous refrigerant at the second air replenishment port 16 and ensuring the air replenishment reliability of the economizer.

[0055] Among them, the second baffle assembly includes a fifth baffle 92, and the fifth baffle 92 is located on one side of the partition 2, and the fifth baffle 92, the partition 2 and the corresponding inner wall of the second air replenishment cavity 12 together form a second exhaust space 18, the second heat exchanger 4 is located in the second exhaust space 18, and the second air replenishment port 16 is connected to the second exhaust space 18. By utilizing the formed second exhaust space 18, the gaseous refrigerant needs to enter the second exhaust space 18 before it can flow to the second air replenishment port 16. During this flow process, the refrigerant droplets entrained in the gaseous refrigerant will be heated by the second heat exchanger 4 and eliminated, eliminating the hidden danger of liquid in the air replenishment.

[0056] The economizer also includes a second filter structure 82, which is arranged in the second exhaust space 18, and the second filter structure 82 is located between the second heat exchanger 4 and the second air supply port 16. The second filter structure 82 is used to further separate the gas-liquid two-phase refrigerant, thereby improving the refrigerant dryness at the second air supply port 16 and improving the air supply reliability of the economizer.

[0057] Since the liquid outlet 15 is arranged in the second air replenishing cavity 12, in order to prevent the liquid refrigerant from flowing directly to the liquid outlet 15 and being unable to be reliably heated and separated, the economizer also includes a sixth baffle 93, the liquid outlet 15 is located on the bottom surface of the second air replenishing cavity 12, the sixth baffle 93 is arranged on the bottom surface of the second air replenishing cavity 12, and the sixth baffle 93 is located between the liquid hole 21 and the liquid outlet 15.

[0058] The first heat exchanger 3 is a fin heat exchanger, which includes a diverter pipe, a header, multiple heat exchange tubes and multiple fins. One end of the heat exchange tube is connected to the diverter pipe, and the other end is connected to the header. All heat exchange tubes are arranged in parallel, and all fins are arranged in parallel along the length direction of the heat exchange tube. The refrigerant can be diverted through the diverter pipe and evenly sent to all heat exchange tubes. The heat exchange tube exchanges heat with the refrigerant outside the tube through the fins, and then is discharged after being collected through the header, completing the flow of refrigerant in the fin heat exchanger.

[0059] The second heat exchanger 4 , the third heat exchanger 5 , and the fourth heat exchanger 6 may all be fin heat exchangers.

[0060] A compressor assembly includes at least two compressors and the above-mentioned economizer, all of the compressors are arranged in series, and at least one of the compressors constitutes the high-pressure part of the compressor assembly, and at least one of the compressors constitutes the low-pressure part of the compressor assembly. The first air supply port 14 is connected to the high-pressure part, and the second air supply port 16 is connected to the low-pressure part. Different air supply pressures are provided through the first air supply port 14 and the second air supply port 16, thereby achieving the purpose of air supply to compressors in different working conditions in the compressor assembly, thereby improving the working efficiency and energy efficiency of the compressor assembly.

[0061] An air conditioning system comprises the economizer or the compressor assembly described above.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An economizer, characterized in that: include: Housing (1); a partition (2), wherein the partition (2) is arranged in the shell (1), and the partition (2) divides the interior of the shell (1) into a first air replenishment chamber (11) and a second air replenishment chamber (12); the first air replenishment chamber (11) is provided with a liquid inlet (13) and a first air replenishment port (14); the second air replenishment chamber (12) is provided with a liquid outlet (15) and a second air replenishment port (16); the partition (2) is provided with a liquid passage hole (21); the first air replenishment chamber (11) and the second air replenishment chamber (12) are connected via the liquid passage hole (21); A first heat exchanger (3), the first heat exchanger (3) being arranged in the first air supplementation cavity (11), and the first heat exchanger (3) having a first inlet (31) and a first outlet (32); A second heat exchanger (4), the second heat exchanger (4) being arranged in the second air supplement chamber (12), and the second heat exchanger (4) having a second inlet (41) and a second outlet (42); The first inlet (31) constitutes a heating inlet of the economizer, the first outlet (32) is connected to the second inlet (41), and the second outlet (42) constitutes a heating outlet of the economizer; The first gas replenishment port (14) can provide a first gas replenishment pressure, and the second gas replenishment port (16) can provide a second gas replenishment pressure, and the first gas replenishment pressure is greater than the second gas replenishment pressure.

2. The economizer according to claim 1, characterized in that: The economizer further comprises a third heat exchanger (5), the third heat exchanger (5) being arranged in the first air supply chamber (11), and the third heat exchanger (5) being located below the first heat exchanger (3), the third heat exchanger (5) having a third inlet (51) and a third outlet (52), the third inlet (51) being connected to the second outlet (42), and the third outlet (52) constituting a heating outlet of the economizer.

3. The economizer according to claim 2, characterized in that: The economizer further comprises a fourth heat exchanger (6), the fourth heat exchanger (6) being arranged in the second air supply chamber (12), and the fourth heat exchanger (6) being located below the second heat exchanger (4), the fourth heat exchanger (6) having a fourth inlet (61) and a fourth outlet (62), the fourth inlet (61) being connected to the second outlet (42), and the fourth outlet (62) being connected to the third inlet (51).

4. The economizer according to claim 1, characterized in that: The economizer further comprises a first baffle assembly, which is arranged in the first air replenishing cavity (11), and the first baffle assembly and the inner wall of the first air replenishing cavity (11) together form a first deflection channel (71), and the liquid inlet (13) and the first air replenishing port (14) are connected through the first deflection channel (71).

5. The economizer according to claim 4, characterized in that: The first baffle assembly comprises a first baffle (72), the first baffle (72) being located on one side of the partition (2), and the first baffle (72), the partition (2) and the inner wall of the corresponding first air replenishment cavity (11) together form a first exhaust space (17), the first heat exchanger (3) being located in the first exhaust space (17), and the first air replenishment port (14) being connected to the first exhaust space (17).

6. The economizer according to claim 5, characterized in that: The economizer further comprises a first filter structure (81), wherein the first filter structure (81) is arranged in the first exhaust space (17), and the first filter structure (81) is located between the first heat exchanger (3) and the first air supply port (14).

7. The economizer according to claim 5, characterized in that: The first baffle assembly further comprises a second baffle (73), wherein the second baffle (73) is arranged on a side wall of the shell (1) away from the partition (2), and the second baffle (73) is located above the liquid inlet (13), and the liquid outlet direction of the liquid inlet (13) points to the bottom of the second baffle (73).

8. The economizer according to claim 7, characterized in that: The first baffle assembly also includes a third baffle (74), which is arranged parallel to the partition (2), and is located between the end of the second baffle (73) close to the partition (2) and the first baffle (72), and a first air-transmitting distance is formed between the third baffle (74) and the end of the second baffle (73) close to the partition (2), and a second air-transmitting distance is formed between the third baffle (74) and the first baffle (72).

9. The economizer according to claim 8, characterized in that: The first baffle assembly further comprises a fourth baffle (75), wherein the fourth baffle (75) is arranged at the lower part of the third baffle (74), and the fourth baffle (75) is located above the liquid level in the first air supplement chamber (11).

10. The economizer according to claim 9, characterized in that: The fourth baffle plate (75) is provided with dripping holes; and / or the fourth baffle plate (75) is arranged horizontally or inclined relative to the liquid level in the first air supplement chamber (11).

11. The economizer according to claim 4, characterized in that: The economizer further comprises a second baffle assembly, which is arranged in the second air supplementation chamber (12), and the second baffle assembly and the first baffle assembly are mirror-symmetrical relative to the partition (2).

12. The economizer according to claim 11, characterized in that: The second baffle assembly comprises a fifth baffle (92), the fifth baffle (92) being located on one side of the partition (2), and the fifth baffle (92), the partition (2) and the inner wall of the corresponding second air replenishment cavity (12) together form a second exhaust space (18), the second heat exchanger (4) is located in the second exhaust space (18), and the second air replenishment port (16) is connected to the second exhaust space (18).

13. The economizer according to claim 12, characterized in that: The economizer further comprises a second filter structure (82), wherein the second filter structure (82) is arranged in the second exhaust space (18), and the second filter structure (82) is located between the second heat exchanger (4) and the second air supply port (16).

14. The economizer according to claim 1, characterized in that: The economizer further comprises a sixth baffle (93), the liquid outlet (15) is located on the bottom surface of the second air replenishing cavity (12), the sixth baffle (93) is arranged on the bottom surface of the second air replenishing cavity (12), and the sixth baffle (93) is located between the liquid passage hole (21) and the liquid outlet (15).

15. The economizer according to claim 1, characterized in that: The first heat exchanger (3) is a fin heat exchanger; and / or the second heat exchanger (4) is a fin heat exchanger.

16. A compressor assembly, characterized in that: The invention comprises at least two compressors and an economizer according to any one of claims 1 to 15, wherein all the compressors are arranged in series, and at least one of the compressors constitutes a high-pressure part of the compressor assembly, and at least one of the compressors constitutes a low-pressure part of the compressor assembly, the first air supply port (14) is connected to the high-pressure part, and the second air supply port (16) is connected to the low-pressure part.

17. An air conditioning system, characterized in that: An economizer comprising the economizer according to any one of claims 1 to 15 or a compressor assembly according to claim 16.

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