Flooded water-cooling screw water chilling unit

Abstract

The utility model relates to the technical field of water chilling units, in particular to a flooded water-cooling screw water chilling unit which comprises a unit base, two evaporators are fixed to the upper surface of the unit base, two stepping motors are fixed to the upper end of the interior of the unit base through bolts, and the upper end of the interior of the unit base is provided with a screw. And power output shafts of the two stepping motors are each fixedly provided with a lead screw, the outer surface of each lead screw is slidably connected with a movable plate, two guide rods fixedly connected with the unit base are symmetrically fixed to the interior of each movable plate, and two supporting legs are symmetrically fixed to the lower end of each movable plate. The two stepping motors arranged in the unit base synchronously drive the two lead screws to rotate, under the cooperation of the guide rods, the movable plate moves vertically, the lower surfaces of the supporting legs are driven to make contact with the ground, the unit base is jacked, the universal wheels are separated from the ground, and the whole unit is limited; the situation that a unit is prone to displacement can be effectively reduced, and stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chillers, in particular to a full-liquid water-cooled screw chiller. Background Art

[0002] Water-cooled screw chillers are also a type of chiller. Since its main component uses a screw compressor, it can be called a water-cooled screw chiller. Its chilled water outlet temperature ranges from three degrees Celsius to twenty degrees Celsius. It can be widely used in various industrial refrigeration processes such as plastics, electroplating, electronics, chemicals, pharmaceuticals, printing, food processing, etc., which require the use of chilled water, or in various central air-conditioning projects such as large shopping malls, hotels, factories, hospitals, etc., which require the use of chilled water for centralized cooling. Screw chillers can provide air conditioning for various buildings and low-temperature water required for other production processes.

[0003] The patent specification with the announcement number CN212806121U discloses a refrigeration and air conditioning water-cooled screw chiller, which includes an evaporator, a screw compressor and a condenser, and a protective outer frame is installed on the outside. The screw compressor is located above the evaporator, and the condenser is located above the screw compressor. By adding a protective outer frame on the outside of the evaporator, the screw compressor and the condenser, the entire chiller can be protected, and the chiller can work outdoors. The brake roller at the lower end of the protective outer frame can facilitate the movement of the entire chiller, thereby improving flexibility during use.

[0004] However, in the implementation of relevant technologies, it was found that the above-designed refrigeration and air-conditioning water-cooled screw chiller has the following problems: in the above-mentioned technical solution, a protective outer frame is provided to protect the entire chiller, and the brake roller at the lower end of the protective outer frame can facilitate the movement of the entire chiller, thereby improving the flexibility during use. Although it can move the unit as a whole, it is unable to effectively limit the position of the unit after the movement, resulting in easy displacement of the unit and poor stability. In view of this, a fully liquid-filled water-cooled screw chiller is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a full liquid water-cooled screw chiller.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fully liquid-cooled screw-type chiller, comprising a unit base, two evaporators are fixed on the upper surface of the unit base, two stepper motors are fixed to the upper end of the unit base by bolts, the power output shafts of the two stepper motors are fixed with screws, the outer surface of the screws are slidably connected with a movable plate, two guide rods fixedly connected to the unit base are symmetrically fixed inside the movable plate, two supporting legs are symmetrically fixed to the lower end of the movable plate, and four universal wheels are fixed to the lower surface of the unit base by bolts.

[0007] As a further description of the above technical solution: a fixing plate is fixed to the upper surface of each of the two evaporators, a screw compressor is fixed to the upper surface of the fixing plate, and the medium is compressed for use by the screw compressor arranged on the fixing plate.

[0008] As a further description of the above technical solution: the output end of the screw compressor is connected to a delivery pipe, and the end of the delivery pipe is connected to a condenser. Through the connecting pipes on both sides of the screw compressor, the liquid in the evaporator enters the screw compressor for compression, and is discharged into the condenser through the delivery pipe for use.

[0009] As a further description of the above technical solution: a protective cover is installed on the right side of the two evaporators, and the side wall of the protective cover is installed with fixing bolts threadedly connected to the evaporator. By unscrewing the fixing bolts on the protective cover, the fixing of the protective cover can be released, which facilitates maintenance of the inside of the evaporator.

[0010] As a further description of the above technical solution: a water inlet pipe is connected to the right side of the protective cover, and a drain pipe connected to the protective cover is provided below the water inlet pipe. Sealing covers are installed at the ends of the water inlet pipe and the drain pipe. By unscrewing one of the sealing covers provided on the water inlet pipe and the drain pipe, it is convenient to add medium to the inside of the evaporator or discharge the medium for replacement, which is easy to use.

[0011] As a further description of the above technical solution: four heat exchange tubes are installed inside the two evaporators. The four heat exchange tubes arranged in the evaporator can improve the heat exchange effect on the medium.

[0012] As a further description of the above technical solution: the outer surfaces of the four heat exchange tubes are fixed with a plurality of convex teeth at equal intervals, and the interiors of the four heat exchange tubes are provided with inner spiral grooves. The four heat exchange tubes are fixed with a plurality of convex teeth, which can increase the contact area between the heat exchange tubes and the medium, and the inner spiral grooves provided in the heat exchange tubes further increase the contact area and improve the transfer effect.

[0013] The utility model has the following beneficial effects:

[0014] The utility model designs a fully liquid-filled water-cooled screw chiller unit. Two stepper motors arranged in the unit base synchronously drive the two lead screws to rotate. With the cooperation of the guide rod, the movable plate moves vertically, thereby driving the lower surface of the supporting legs to contact the ground, lifting the unit base, separating the universal wheels from the ground, and limiting the position of the unit as a whole, which can effectively reduce the situation where the unit is prone to displacement and improve stability.

[0015] The utility model designs a fully liquid-filled water-cooled screw chiller. Through the connecting pipes on both sides of the screw compressor, the liquid in the evaporator enters the screw compressor for compression, and is discharged into the condenser for use through the delivery pipe; through the sealing covers arranged on the water inlet pipe and the liquid discharge pipe, one of the sealing covers can be unscrewed, so that the medium inside the evaporator can be conveniently added or the medium can be discharged for replacement, which is convenient for use; a plurality of convex teeth are fixed on the four heat exchange tubes, which can increase the contact area between the heat exchange tube and the medium, and the inner spiral grooves opened in the heat exchange tubes further increase the contact area, thereby improving the transfer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional structural diagram of the base of the unit of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the evaporator of the utility model;

[0019] Figure 4 For this utility model Figure 1 Enlarged view of point A in the middle.

[0020] Legend:

[0021] 1. Unit base; 2. Evaporator; 3. Stepper motor; 4. Screw; 5. Movable plate; 6. Guide rod; 7. Support leg; 8. Universal wheel; 9. Fixed plate; 10. Screw compressor; 11. Delivery pipe; 12. Condenser; 13. Protective cover; 14. Fixing bolts; 15. Water inlet pipe; 16. Drain pipe; 17. Sealing cover; 18. Heat exchange tube; 19. Protruding teeth; 20. Inner spiral groove. DETAILED DESCRIPTION

[0022] Reference Figure 1-Figure 4The utility model provides a full liquid water-cooled screw chiller: it includes a unit base 1, two evaporators 2 are fixed on the upper surface of the unit base 1, two stepping motors 3 are fixed to the upper end of the unit base 1 by bolts, the power output shafts of the two stepping motors 3 are fixed with screws 4, the outer surface of the screws 4 is slidably connected with a movable plate 5, the inside of the movable plate 5 is symmetrically fixed with two guide rods 6 fixedly connected to the unit base 1, and two supporting legs 7 are symmetrically fixed to the lower end of the movable plate 5. Four universal wheels 8 are fixed to the lower surface of the unit base 1 by bolts. The two stepping motors 3 arranged in the unit base 1 synchronously drive the two screw rods 4 to rotate. With the cooperation of the guide rods 6, the movable plate 5 makes a vertical movement, thereby driving the lower surface of the supporting leg 7 to contact the ground, lifting the unit base 1, separating the universal wheels 8 from the ground, and limiting the position of the unit as a whole, which can effectively reduce the situation where the unit is prone to displacement and improve stability.

[0023] As a further implementation scheme of the above technical scheme: a fixing plate 9 is fixed to the upper surface of each of the two evaporators 2, and a screw compressor 10 is fixed to the upper surface of the fixing plate 9. The medium is compressed by the screw compressor 10 arranged on the fixing plate 9 for use.

[0024] As a further implementation scheme of the above technical scheme: the output end of the screw compressor 10 is connected to a delivery pipe 11, and the end of the delivery pipe 11 is connected to a condenser 12. Through the connecting pipes on both sides of the screw compressor 10, the liquid in the evaporator 2 enters the screw compressor 10 for compression, and is discharged into the condenser 12 through the delivery pipe 11 for use.

[0025] In specific implementation, before using the full-liquid water-cooled screw chiller, first move the unit to a suitable position through the universal wheel 8 on the unit base 1, and then the two stepping motors 3 arranged in the unit base 1 can synchronously drive the two screws 4 to rotate, and with the cooperation of the guide rod 6, the movable plate 5 moves vertically, thereby driving the lower surface of the support leg 7 to contact the ground, thereby lifting the unit base 1 and separating the universal wheel 8 from the ground, thereby limiting the position of the unit as a whole, which can effectively reduce the situation where the unit is prone to displacement and improve stability. A screw compressor 10 is arranged on the fixed plate 9. Through the connecting pipes on both sides of the screw compressor 10, the liquid in the evaporator 2 can enter the screw compressor 10 for compression, and then be discharged into the condenser 12 through the delivery pipe 11.

[0026] As a further implementation scheme of the above technical scheme: a protective cover 13 is installed on the right side of each of the two evaporators 2, and a fixing bolt 14 threadedly connected to the evaporator 2 is installed on the side wall of the protective cover 13. By unscrewing the fixing bolt 14 on the protective cover 13, the fixing of the protective cover 13 can be released, thereby facilitating maintenance of the interior of the evaporator 2.

[0027] As a further implementation scheme of the above technical scheme: the right side of the protective cover 13 is connected to a water inlet pipe 15, and a drain pipe 16 connected to the protective cover 13 is provided below the water inlet pipe 15. Sealing covers 17 are installed at the ends of the water inlet pipe 15 and the drain pipe 16. By unscrewing one of the sealing covers 17 provided on the water inlet pipe 15 and the drain pipe 16, it is convenient to add medium to the inside of the evaporator 2 or discharge the medium for replacement, which is easy to use.

[0028] As a further implementation scheme of the above technical scheme: four heat exchange tubes 18 are installed inside the two evaporators 2. The four heat exchange tubes 18 arranged inside the evaporator 2 can improve the heat exchange effect on the medium.

[0029] As a further implementation scheme of the above technical scheme: a number of convex teeth 19 are fixed at equal intervals on the outer surfaces of the four heat exchange tubes 18, and an inner spiral groove 20 is opened inside the four heat exchange tubes 18. A number of convex teeth 19 are fixed on the four heat exchange tubes 18, which can increase the contact area between the heat exchange tubes 18 and the medium. The inner spiral groove 20 opened in the heat exchange tubes 18 further increases the contact area and improves the transfer effect.

[0030] In specific implementation, the four heat exchange tubes 18 arranged in the evaporator 2 can improve the heat exchange effect on the medium, and a number of convex teeth 19 are fixed on the four heat exchange tubes 18, which can increase the contact area between the heat exchange tubes 18 and the medium. The inner spiral groove 20 opened in the heat exchange tube 18 further increases the contact area and improves the transfer effect. By unscrewing the fixing bolts 14 on the protective cover 13, the fixing of the protective cover 13 can be released, which is convenient for maintenance of the inside of the evaporator 2. By unscrewing one of the sealing covers 17 arranged on the water inlet pipe 15 and the drain pipe 16, it is convenient to add medium to the inside of the evaporator 2 or discharge the medium for replacement, which is convenient for use.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flooded water-cooled screw chiller, comprising a chiller base (1), wherein two evaporators (2) are fixed on the upper surface of the chiller base (1). Features: Two stepper motors (3) are fixed to the upper end of the unit base (1) by bolts, and the power output shafts of the two stepper motors (3) are fixed with screw rods (4). The outer surface of the screw rods (4) is slidably connected with a movable plate (5). Two guide rods (6) fixedly connected to the unit base (1) are symmetrically fixed inside the movable plate (5). Two supporting legs (7) are symmetrically fixed to the lower end of the movable plate (5). Four universal wheels (8) are fixed to the lower surface of the unit base (1) by bolts.

2. A flooded water-cooled screw chiller according to claim 1, Features: A fixing plate (9) is fixed to the upper surface of each of the two evaporators (2), and a screw compressor (10) is fixed to the upper surface of the fixing plate (9).

3. A liquid-filled water-cooled screw chiller according to claim 2, Features: The output end of the screw compressor (10) is connected to a delivery pipe (11), and the end of the delivery pipe (11) is connected to a condenser (12).

4. A liquid-filled water-cooled screw chiller according to claim 1, Features: A protective cover (13) is installed on the right side of the two evaporators (2), and a fixing bolt (14) threadedly connected to the evaporator (2) is installed on the side wall of the protective cover (13).

5. A liquid-filled water-cooled screw chiller according to claim 4, Features: The right side of the protective cover (13) is connected to a water inlet pipe (15), a liquid discharge pipe (16) which is connected to the protective cover (13) is provided below the water inlet pipe (15), and sealing covers (17) are installed at the ends of the water inlet pipe (15) and the liquid discharge pipe (16).

6. A flooded water-cooled screw chiller according to claim 1, Features: Four heat exchange tubes (18) are installed inside the two evaporators (2).

7. A liquid-filled water-cooled screw chiller according to claim 6, Features: A plurality of convex teeth (19) are fixed at equal intervals on the outer surfaces of the four heat exchange tubes (18), and inner spiral grooves (20) are provided inside the four heat exchange tubes (18).

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