Throttling pipeline structure of air-suspension variable-frequency centrifugal water chilling unit

Abstract

The utility model discloses a throttling pipeline structure of an air suspension variable frequency centrifugal water chilling unit, which belongs to the technical field of water chiller and comprises a compressor, an evaporator, a condenser and an economizer, the compressor is communicated with the economizer through an air supply pipeline, and the compressor is communicated with the condenser through an exhaust pipeline. The compressor is communicated with the evaporator through a shutdown pipeline and an air suction pipeline, the condenser is communicated with the evaporator through a hot air bypass pipeline, the condenser is communicated with the economizer through a first-stage throttling pipeline, and the economizer is communicated with the evaporator through a second-stage throttling pipeline. The throttling pipelines are connected with the container through flanges, so that an operator can conveniently disassemble and install the throttling pipelines and subsequently overhaul a unit; meanwhile, the electric ball valve and the throttling orifice plate are connected in series, the problem that the opening degree of the electric ball valve is set to be too large can be effectively solved, and therefore the water chilling unit can be better matched, and the water chilling unit can stably operate to achieve the ideal refrigeration effect.

Description

Technical Field

[0001] This utility model belongs to the field of chiller technology, and in particular relates to the throttling pipeline structure of an air-suspended variable frequency centrifugal chiller unit. Background Technology

[0002] The throttling mechanism is one of the important components of a refrigeration system. Its function is to reduce the saturated liquid (or subcooled liquid) in the condenser or receiver from the condensing pressure to the evaporating pressure and evaporating temperature, and at the same time, adjust the flow rate of refrigerant entering the evaporator according to the load changes.

[0003] In air-suspended chiller units, if the liquid supply from the throttling mechanism to the evaporator is too large compared to the evaporator load, some liquid refrigerant will enter the compressor along with the gaseous refrigerant, causing liquid slugging. Conversely, if the liquid supply is too small compared to the evaporator load, part of the heat exchange area of ​​the evaporator will not be fully utilized, and may even cause a decrease in evaporation pressure, a reduction in the system's cooling capacity, and a decrease in the coefficient of performance (COP).

[0004] Therefore, selecting a suitable throttling device based on the characteristics and cooling effect of the chiller unit is of great significance to the unit's cooling capacity and operational stability. Utility Model Content

[0005] To address the technical problem of poor throttling effect of the throttling mechanism mentioned in the background art, a throttling pipeline structure for an air-suspended variable frequency centrifugal chiller unit is provided to solve the above-mentioned problem.

[0006] To achieve the above objectives, the specific technical solution of the throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit of this utility model is as follows:

[0007] A throttling pipeline structure for an air-suspension variable frequency centrifugal chiller includes a compressor, an evaporator, a condenser, and an economizer. The compressor and the economizer are connected by a gas supply pipeline, the compressor and the condenser are connected by a discharge pipeline, the compressor and the evaporator are connected by a shutdown pipeline and a suction pipeline, the condenser and the evaporator are connected by a hot gas bypass pipeline, the condenser and the economizer are connected by a primary throttling pipeline, and the economizer and the evaporator are connected by a secondary throttling pipeline.

[0008] Furthermore, it also includes a main controller, with a first electric ball valve installed on the primary throttling pipeline and a second electric ball valve installed on the secondary throttling pipeline. The main controller is electrically connected to the first and second electric ball valves, thereby controlling the valve opening degree of the first and / or second electric ball valves through the main controller.

[0009] Furthermore, the primary throttling pipeline is equipped with a first flange and a second flange. The primary throttling pipeline is connected to the condenser flange through the first flange, and the primary throttling pipeline is connected to the economizer flange through the second flange.

[0010] Furthermore, the primary throttling pipeline includes a first steel pipe pipeline, a second steel pipe pipeline, a third steel pipe pipeline, and a fourth steel pipe pipeline.

[0011] The first steel pipe is equipped with a first flange and a third flange at both ends.

[0012] The second steel pipe is equipped with a fourth flange and a fifth flange at both ends.

[0013] The third steel pipe is equipped with a sixth flange and a seventh flange at both ends.

[0014] The fourth steel pipe is equipped with a second flange and an eighth flange at both ends.

[0015] The first steel pipe is connected to the second steel pipe via a third flange and a fourth flange;

[0016] The second steel pipe is connected to the third steel pipe via the fifth flange and the sixth flange;

[0017] The third steel pipe is connected to the fourth steel pipe via the seventh flange and the eighth flange;

[0018] The first electric ball valve is located on the second steel pipe.

[0019] Furthermore, a first throttling orifice plate is provided between the seventh flange and the eighth flange.

[0020] Furthermore, a first shut-off valve and a drying filter barrel are installed on the first steel pipe. The first shut-off valve is located downstream of the first flange, and the drying filter barrel is located downstream of the first shut-off valve.

[0021] A second shut-off valve is installed on the fourth steel pipe, which is located upstream of the second flange.

[0022] Furthermore, the secondary throttling pipeline is equipped with a ninth flange and a tenth flange. The secondary throttling pipeline is connected to the economizer flange through the ninth flange, and to the evaporator flange through the tenth flange.

[0023] Furthermore, the secondary throttling pipeline includes the fifth, sixth, seventh, and eighth steel pipe pipelines.

[0024] The fifth steel pipe is equipped with a ninth flange and an eleventh flange at both ends.

[0025] The sixth steel pipe is equipped with a twelfth flange and a thirteenth flange at both ends.

[0026] The seventh steel pipe is equipped with the fourteenth and fifteenth flanges at both ends.

[0027] The eighth steel pipe is equipped with the sixteenth flange and the tenth flange at both ends.

[0028] The fifth steel pipe is connected to the sixth steel pipe via the eleventh and twelfth flanges;

[0029] The sixth and seventh steel pipes are connected by the thirteenth and fourteenth flanges;

[0030] The seventh steel pipe is connected to the eighth steel pipe via the fifteenth flange and the sixteenth flange;

[0031] The second electric ball valve is located on the sixth steel pipe.

[0032] Furthermore, a second orifice plate is provided between the fifteenth flange and the sixteenth flange.

[0033] Furthermore, a third shut-off valve is installed on the fifth steel pipe, which is located downstream of the ninth flange, and a fourth shut-off valve is installed on the eighth steel pipe, which is located upstream of the tenth flange.

[0034] The throttling pipeline structure of the air-suspended variable frequency centrifugal chiller unit of this utility model has the following advantages:

[0035] The throttling pipeline of this utility model uses flanges to connect to the container, which facilitates disassembly, installation and subsequent maintenance of the unit by operators; at the same time, by setting the electric ball valve and the orifice plate in series, the problem of the electric ball valve opening being set too large can be effectively prevented, so as to better adapt to the chiller unit and make it operate stably to achieve the ideal cooling effect. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit of this utility model;

[0037] Figure 2 This is a schematic diagram of the primary throttling pipeline structure of this utility model;

[0038] Figure 3 This is a schematic diagram of the two-stage throttling pipeline structure of this utility model;

[0039] Explanation of markings in the diagram: 1. Compressor; 2. Evaporator; 3. Condenser; 4. Economizer; 5. First-stage throttling pipeline; 501. First electric ball valve; 511. First steel pipe pipeline; 512. Second steel pipe pipeline; 513. Third steel pipe pipeline; 514. Fourth steel pipe pipeline; 502. First throttling orifice plate; 503. First shut-off valve; 504. Dryer filter barrel; 505. Second shut-off valve; 6. Second-stage throttling pipeline; 601. Second electric ball valve; 611. Fifth steel pipe pipeline; 612. Sixth steel pipe pipeline; 613. Seventh steel pipe. Piping; 614, Eighth steel pipe; 602, Second orifice plate; 603, Third shut-off valve; 604, Fourth shut-off valve; 10, First flange; 20, Second flange; 30, Third flange; 40, Fourth flange; 50, Fifth flange; 60, Sixth flange; 70, Seventh flange; 80, Eighth flange; 90, Ninth flange; 100, Tenth flange; 110, Eleventh flange; 120, Twelfth flange; 130, Thirteenth flange; 140, Fourteenth flange; 150, Fifteenth flange; 160, Sixteenth flange. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0042] The following is a reference to the appendix. Figure 1 To be continued Figure 3 This invention describes the throttling pipeline structure of an air-suspension variable frequency centrifugal chiller unit.

[0043] A throttling pipeline structure for an air-suspended variable frequency centrifugal chiller unit, such as Figure 1As shown, the system includes a compressor 1, an evaporator 2, a condenser 3, and an economizer 4. The compressor 1 and the economizer 4 are connected by a gas supply line, the compressor 1 and the condenser 3 are connected by a discharge line, the compressor 1 and the evaporator 2 are connected by a shutdown line and a suction line, the condenser 3 and the evaporator 2 are connected by a hot gas bypass line, the condenser 3 and the economizer 4 are connected by a primary throttling line 5, and the economizer 4 and the evaporator 2 are connected by a secondary throttling line 6. Specifically, by using the primary throttling line 5 and the secondary throttling line 6, the pressure and flow rate of the refrigerant can be controlled more precisely, thereby ensuring a more stable refrigerant flow between the condenser 3, the economizer 4, and the evaporator 2, and avoiding problems of excessive or insufficient refrigerant supply.

[0044] Preferably, a main controller (not shown in the figure) is also included. A first electric ball valve 501 is installed on the primary throttling pipeline 5, and a second electric ball valve 601 is installed on the secondary throttling pipeline 6. The main controller is electrically connected to the first electric ball valve 501 and the second electric ball valve 601, thereby controlling the valve opening of the first electric ball valve 501 and / or the second electric ball valve 601 through the main controller. Specifically, it realizes precise dynamic adjustment of refrigerant flow, and can adjust the liquid supply in real time according to the change of evaporator 2 load, avoiding the problem of uneven liquid supply caused by the fixed adjustment of traditional throttling mechanism, and improving the stability and efficiency of system operation.

[0045] As a preferred option, such as Figure 2 As shown, the primary throttling pipeline 5 is equipped with a first flange 10 and a second flange 20. The primary throttling pipeline 5 is connected to the condenser 3 flange through the first flange 10, and the primary throttling pipeline 5 is connected to the economizer 4 flange through the second flange 20. Specifically, the flange connection improves the sealing and reliability of the pipeline, ensures the stable flow of refrigerant in the pipeline, and facilitates subsequent maintenance and replacement of parts.

[0046] Preferably, the primary throttling pipeline 5 includes a first steel pipe 511, a second steel pipe 512, a third steel pipe 513, and a fourth steel pipe 514. The first steel pipe 511 has a first flange 10 and a third flange 30 at both ends; the second steel pipe 512 has a fourth flange 40 and a fifth flange 50 at both ends; the third steel pipe 513 has a sixth flange 60 and a seventh flange 70 at both ends; and the fourth steel pipe 514 has a second flange 20 and an eighth flange 80 at both ends. The first steel pipe 511... The second steel pipe 512 is connected to the third steel pipe 513 via the third flange 30 and the fourth flange 40; the second steel pipe 512 is connected to the third steel pipe 513 via the fifth flange 50 and the sixth flange 60; the third steel pipe 513 is connected to the fourth steel pipe 514 via the seventh flange 70 and the eighth flange 80; the first electric ball valve 501 is located on the second steel pipe 512. Specifically, this ensures that the structure of the first-stage throttling pipeline 5 is compact and easy to maintain. The segmented connection facilitates subsequent cleaning of the pipeline or replacement of some components.

[0047] Preferably, a first throttling orifice plate 502 is provided between the seventh flange 70 and the eighth flange 80 to further regulate the refrigerant flow. When used in conjunction with the first electric ball valve 501, it can effectively reduce the refrigerant pressure, avoid the risk of liquid slugging caused by excessive pressure, and also ensure the stability of the liquid level in the first-stage throttling pipeline 5.

[0048] Preferably, the first steel pipe 511 is equipped with a first shut-off valve 503 and a dryer filter 504. The first shut-off valve 503 is located downstream of the first flange 10, and the dryer filter 504 is located downstream of the first shut-off valve 503. The fourth steel pipe 514 is equipped with a second shut-off valve 505, which is located upstream of the second flange 20. Specifically, the dryer filter 504 removes impurities and moisture from the refrigerant to ensure the clean operation of the system. The first shut-off valve 503 and the second shut-off valve 505 are used to control the opening and closing of the first-stage throttling pipe 5, which facilitates system maintenance or operation in emergency situations.

[0049] As a preferred option, such as Figure 3 As shown, the secondary throttling pipeline 6 is equipped with a ninth flange 90 and a tenth flange 100. The secondary throttling pipeline 6 is connected to the economizer 4 flange through the ninth flange 90 and to the evaporator 2 flange through the tenth flange 100. Specifically, the flange connection improves the sealing and reliability of the secondary throttling pipeline 6, ensures the stable flow of refrigerant between the economizer 4 and the evaporator 2, and facilitates later maintenance and component replacement.

[0050] Preferably, the secondary throttling pipeline 6 includes a fifth steel pipe 611, a sixth steel pipe 612, a seventh steel pipe 613, and an eighth steel pipe 614. The fifth steel pipe 611 has a ninth flange 90 and an eleventh flange 110 at both ends; the sixth steel pipe 612 has a twelfth flange 120 and a thirteenth flange 130 at both ends; the seventh steel pipe 613 has a fourteenth flange 140 and a fifteenth flange 150 at both ends; and the eighth steel pipe 614 has a sixteenth flange 160 and a tenth flange 100 at both ends. The fifth steel pipe 611... The sixth steel pipe 612 is connected to the seventh steel pipe 613 via the eleventh flange 110 and the twelfth flange 120; the seventh steel pipe 612 is connected to the seventh steel pipe 613 via the thirteenth flange 130 and the fourteenth flange 140; the seventh steel pipe 613 is connected to the eighth steel pipe 614 via the fifteenth flange 150 and the sixteenth flange 160; the second electric ball valve 601 is located on the sixth steel pipe 612. Specifically, the segmented connection facilitates subsequent cleaning of the pipeline or replacement of some components, ensuring that the secondary throttling pipeline 6 has a compact structure and is easy to maintain.

[0051] Preferably, a second throttling orifice plate 602 is provided between the fifteenth flange 150 and the sixteenth flange 160 to further regulate the refrigerant flow. When used in conjunction with the second electric ball valve 601, it can effectively reduce the refrigerant pressure, avoid the risk of liquid slugging caused by excessive pressure, and also ensure the stability of the liquid level in the secondary throttling pipeline 6.

[0052] Preferably, a third shut-off valve 603 is installed on the fifth steel pipe 611, which is located downstream of the ninth flange 90. A fourth shut-off valve 604 is installed on the eighth steel pipe 614, which is located upstream of the tenth flange 100. Specifically, the third shut-off valve 603 and the fourth shut-off valve 604 are used to control the opening and closing of the secondary throttling pipe 6, which facilitates system maintenance or operation in emergency situations.

[0053] The throttling pipeline of this utility model uses flanges to connect to the container, which facilitates disassembly, installation and subsequent maintenance of the unit by operators; at the same time, by setting the electric ball valve and the orifice plate in series, the problem of the electric ball valve opening being set too large can be effectively prevented, so as to better adapt to the chiller unit and make it operate stably to achieve the ideal cooling effect.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A throttling pipeline structure for an air-suspension variable frequency centrifugal chiller unit, comprising a compressor, an evaporator, a condenser, and an economizer, wherein the compressor and the economizer are connected via a make-up air pipeline, the compressor and the condenser are connected via a discharge pipeline, the compressor and the evaporator are connected via a shutdown pipeline and a suction pipeline, and the condenser and the evaporator are connected via a hot gas bypass pipeline, characterized in that, The condenser and economizer are connected through a primary throttling pipe, and the economizer and evaporator are connected through a secondary throttling pipe.

2. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 1, characterized in that, It also includes a main controller, a first electric ball valve is installed on the first-stage throttling pipeline, and a second electric ball valve is installed on the second-stage throttling pipeline. The main controller is electrically connected to the first electric ball valve and the second electric ball valve, thereby controlling the valve opening degree of the first electric ball valve and / or the second electric ball valve through the main controller.

3. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 2, characterized in that, The primary throttling pipeline is equipped with a first flange and a second flange. The primary throttling pipeline is connected to the condenser flange through the first flange, and the primary throttling pipeline is connected to the economizer flange through the second flange.

4. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 3, characterized in that, The primary throttling pipeline includes a first steel pipe pipeline, a second steel pipe pipeline, a third steel pipe pipeline, and a fourth steel pipe pipeline. The first steel pipe is equipped with a first flange and a third flange at both ends. The second steel pipe is equipped with a fourth flange and a fifth flange at both ends. The third steel pipe is equipped with a sixth flange and a seventh flange at both ends. The fourth steel pipe is equipped with a second flange and an eighth flange at both ends. The first steel pipe is connected to the second steel pipe via a third flange and a fourth flange; The second steel pipe is connected to the third steel pipe via the fifth flange and the sixth flange; The third steel pipe is connected to the fourth steel pipe via the seventh flange and the eighth flange; The first electric ball valve is located on the second steel pipe.

5. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 4, characterized in that, A first throttling orifice plate is provided between the seventh flange and the eighth flange.

6. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 4, characterized in that, The first steel pipe is equipped with a first shut-off valve and a drying filter barrel. The first shut-off valve is located downstream of the first flange, and the drying filter barrel is located downstream of the first shut-off valve. A second shut-off valve is installed on the fourth steel pipe, which is located upstream of the second flange.

7. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 2, characterized in that, The secondary throttling pipeline is equipped with a ninth flange and a tenth flange. The secondary throttling pipeline is connected to the economizer flange through the ninth flange, and to the evaporator flange through the tenth flange.

8. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 7, characterized in that, The secondary throttling pipeline includes the fifth, sixth, seventh, and eighth steel pipe pipelines. The fifth steel pipe is equipped with a ninth flange and an eleventh flange at both ends. The sixth steel pipe is equipped with a twelfth flange and a thirteenth flange at both ends. The seventh steel pipe is equipped with the fourteenth and fifteenth flanges at both ends. The eighth steel pipe is equipped with the sixteenth flange and the tenth flange at both ends. The fifth steel pipe is connected to the sixth steel pipe via the eleventh and twelfth flanges; The sixth and seventh steel pipes are connected by the thirteenth and fourteenth flanges; The seventh steel pipe is connected to the eighth steel pipe via the fifteenth flange and the sixteenth flange; The second electric ball valve is located on the sixth steel pipe.

9. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 8, characterized in that, A second orifice plate is provided between the fifteenth and sixteenth flanges.

10. The throttling pipeline structure of the air-suspension variable frequency centrifugal chiller unit according to claim 8, characterized in that, A third shut-off valve is installed on the fifth steel pipe, which is located downstream of the ninth flange. A fourth shut-off valve is installed on the eighth steel pipe, which is located upstream of the tenth flange.

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