Four-pipe air-cooled screw unit

Abstract

The invention discloses a four-pipe air-cooled screw unit, and belongs to the technical field of refrigeration equipment.The four-pipe air-cooled screw unit comprises a unit shell and a vertical frame, the vertical frame is arranged on one side of the unit shell, and a plurality of ventilation openings are formed in the top of the unit shell; each ventilation opening is sleeved with an adjusting device used for adjusting the air flow path, an electric push rod is installed on the top wall of the vertical frame, the two output ends of the double-shaft motor are fixedly connected with rotating gears correspondingly, and the two rotating gears are engaged with two moving racks correspondingly. The end, facing the ventilation opening, of the moving rack is provided with a control mechanism used for adjusting airflow paths. By arranging the adjusting device outside the ventilation opening, a worker can control the size of the airflow path of the ventilation opening, so that the airflow path is adjusted according to different operation states of the unit, and the airflow paths of different parts of the unit can be separately controlled by adjusting the control mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration equipment, and in particular relates to a four-pipe air-cooled screw unit. Background Art

[0002] Air-cooled screw chillers are central air-conditioning units that use air as a cooling medium and heat source, and water as a refrigerant. As an integrated device that uses both cold and hot sources, it eliminates the need for a variety of accessories such as cooling towers, cooling water pumps, boilers, and corresponding system pipelines. The system has a compact structure, small installation space, convenient maintenance, and energy conservation, and is especially suitable for areas with a lack of water sources. Air-cooled screw chillers are usually centralized or semi-centralized central air-conditioning systems composed of terminal devices such as fan coils and air-conditioning boxes, and have the advantages of flexible layout and diverse control methods.

[0003] Four-pipe air-cooled screw units are widely used in various occasions due to their compact structure and high efficiency and energy saving. However, since they are composed of multiple screw machines, their shortcomings during operation will be further magnified. For example, the noise problem. Due to the use of air cooling, the unit will generate a lot of noise when it is running, and the noise problem will change with the operation of the unit. The noise is the loudest when the unit is running at full speed, and the noise is the smallest when the unit is running at low speed. Since the unit is operated in an air-cooled manner, it is necessary to ensure an unobstructed airflow path, so it is not convenient to set up isolation equipment such as soundproof covers near the unit. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a four-pipe air-cooled screw unit.

[0005] The technical solution adopted to solve the above technical problems is: A four-pipe air-cooled screw unit comprises a unit housing and a stand, wherein the stand is arranged on one side of the unit housing, and a plurality of vents are arranged on the top of the unit housing, and an adjustment device for adjusting the airflow path is sleeved on the outside of each of the vents, and an elevated frame is arranged on the top of the stand, and an electric push rod is arranged on the top wall of the stand, and the electric push rod is located at the bottom of the elevated frame, and a dual-axis motor is arranged on the top of the elevated frame, and two output ends of the dual-axis motor are respectively fixedly connected with rotating gears, and two limiting grooves are provided on the top wall of the elevated frame, and moving racks are respectively slidably connected in the two limiting grooves, and the two rotating gears are respectively meshed with two moving racks, and a control mechanism for respectively adjusting the airflow path is arranged on the end of the moving rack facing the vent.

[0006] Through the above technical solution, an adjustment device is set on the outside of the vent, and the staff can control the size of the airflow path of the vent, thereby adjusting the airflow path according to different operating conditions of the unit, and the airflow paths of different parts of the unit can be separately controlled by adjusting the control mechanism.

[0007] Furthermore, the adjustment device includes a sleeve, a ring, a telescopic rod, a center block, a plurality of fan blades, a plurality of rotating rods, a plurality of fixed cylinders, a plurality of swing rods and a plurality of fixed rods, the sleeve is sleeved outside the vent, the center block is arranged in the middle position of the sleeve, the ring is sleeved outside the sleeve and is rotatably connected to the outside of the sleeve, the telescopic rod is fixedly connected to the outer side wall of the ring, the bottom wall of the telescopic rod away from the ring is rotatably connected with the rod, and a plurality of fixed rods are also fixedly connected to the side wall of the ring, the fan blades are designed to be narrow at one end and wide at the other end, the narrow end of each fan blade is rotatably connected to the side wall of the center block, the wide end of the fan blade is fixedly connected to one end of the rotating rod, a plurality of fixed cylinders are respectively arranged on the side walls of the sleeve, a plurality of rotating rods away from one end of the fan blades respectively pass through a plurality of fixed cylinders and extend outside the sleeve, a plurality of rotating rods away from one end of the fan blades are respectively fixedly connected to the side walls of one end of a plurality of swing rods, the side walls of the swing rods are provided with movable holes, and a plurality of fixed rods are respectively located in the plurality of movable holes.

[0008] Through the above technical solution, after the ring is driven to rotate, the fixed rod fixed on the side wall of the ring will drive the swing rod to swing around the rotating rod, and the rotation of the swing rod will drive the rotating rod to rotate, thereby causing the fan blades to rotate around the center block. The rotation of the fan blades will cause the airflow path of the vent to be blocked or opened, thereby reducing unnecessary air flow and reducing energy consumption.

[0009] Furthermore, three thin rods are fixedly connected to the inner wall of the sleeve, and the three thin rods are fixedly connected to the bottom wall of the center block away from the top wall of one end of the sleeve, and the three thin rods are respectively located in the middle positions of the three fan blades.

[0010] Through the above technical solution, the thin rod will support the center block, thereby ensuring the stability of the center block. At the same time, since the thin rod is located in the middle of the fan blades, when the fan blades rotate, the thin rod will not affect the airflow path of the vent.

[0011] Furthermore, a plurality of fixed frames are fixedly connected to the outer wall of the sleeve, the fixed frames are "U"-shaped, the openings of the fixed frames are facing away from the sleeve, a cam is rotatably connected in the fixed frame, the ring is rotatably connected to a plurality of cam side walls, and the bottom wall of the ring abuts against the cam side wall.

[0012] Through the above technical solution, in order to ensure the rotation stability of the ring, a cam is set on the side wall of the sleeve. The ring stuck in the cam and rotating can be supported by the cam, and the smoothness of the ring rotation can also be ensured.

[0013] Furthermore, a plurality of the fan blade side walls are respectively fixedly connected with rubber strips, and the length of the rubber strips is consistent with the length of the fan blades.

[0014] Through the above technical solution, when the fan blades rotate to a closed state, small gaps will inevitably appear between the blades, and the deformable rubber strips can block the gaps to prevent external dust and debris from entering the vents.

[0015] Furthermore, the shape of the fixing rod is cylindrical, and the movable hole inside the swing rod is a waist-shaped hole.

[0016] Through the above technical solution, since the round rod will drive the circular ring to rotate, the fixed rod fixed on the side wall of the circular ring will drive the movable hole and the swing rod to swing. In order to adapt to the cylindrical fixed rod, the movable hole needs to be set as a waist-shaped hole with arcs at both ends.

[0017] Furthermore, the control mechanism includes a pushing rod, a pushing block, a curved rod, a movable block and a motion block, the pushing rod is fixedly connected to the output end of the electric pushing rod, the pushing rod is fixedly connected to the top wall of the pushing block at one end away from the electric pushing rod, a transverse groove is provided on the top wall of the unit housing, the pushing block, the movable block and the motion block are all slidably connected to the inner wall of the transverse groove, the top wall of the unit housing is provided with two pushing grooves, the pushing grooves are connected to the side walls of the transverse grooves, the pushing grooves are consistent in size with the movable block, the position of the pushing grooves corresponds to the position of the movable block, the curved rod is "L"-shaped, one end of the curved rod is fixedly connected to the motion rack, and the other end is fixedly connected to the top wall of the movable block, the two ends of the movable block are respectively inserted into the side walls of the motion block and the side walls of the pushing block, and a plurality of the round rods are fixedly connected to the top wall of the motion block at one end away from the telescopic rod.

[0018] Through the above technical solution, when the electric push rod drives the pushing rod forward, the pushing block fixed at the other end of the fixed rod can drive the movable block and the motion block to move along the horizontal groove. When the staff needs to control the vent of the unit on one side separately, the output shaft at one end of the dual-axis motor can be controlled separately to make the movable block leave the motion block, so that the airflow path of the vent on one side no longer changes, thereby changing the airflow path of the vent on the other side separately.

[0019] Furthermore, both ends of the movable block are fixedly connected with plug rods, the side wall of the push block facing the movable block is provided with a slot, and the side wall of the motion block facing the movable block is also provided with a slot, and the two plug rods are respectively inserted into the two slots.

[0020] Through the above technical scheme, there are many ways to ensure the plug-in relationship between the movable block and the motion block. The plug-in rod and slot method proposed here is a very common one, in which the slot is not open at both ends. The end facing the push slot is closed and the end facing the push slot is open, which facilitates the plug-in rod and the movable block to leave and enter the slot.

[0021] The beneficial effects of the present invention are as follows: The present invention arranges an adjustment device outside the vent so that the rotatable fan blades can accurately control the flow rate and direction of the airflow according to the needs, thereby adjusting the airflow path under different working conditions. At the same time, the inclined fan blades can also play the role of guide plates, which can guide the airflow to flow out smoothly and reduce backflow and interference. At the same time, the opening of the fan blades can also open the airflow channel, reduce the airflow speed, and effectively control the noise during the operation of the air-cooled screw unit. The present invention sets two groups of control mechanisms on the top of the unit shell because the vents on the top of the unit can be divided into two groups. When full-speed operation is not required, one group in the air-cooled screw unit will keep running, while the other group will be in a low-speed operation state. Therefore, the rotation angle of the fan blades can be controlled separately by controlling the electric push rod. The fan blades corresponding to the high-speed operating vents will be in a wide open state, while the fan blades corresponding to the low-speed operating vents will be relatively closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the overall structural diagram of the present invention; Figure 2 is a bottom view of the adjustment device of the present invention; Figure 3 is a top view of the adjustment device of the present invention; Figure 4 It is a schematic diagram of the structure of the ring and the concave wheel in the present invention; Figure 5 It is a structural schematic diagram of the control mechanism in the present invention; Figure 6 It is a structural schematic diagram of the movable block, the pushing block and the motion block in the present invention.

[0023] Figure numerals: 1. Unit casing; 2. Stand; 3. Ventilation port; 4. Heightening frame; 5. Electric push rod; 6. Dual-axis motor; 7. Rotating gear; 8. Limiting groove; 9. Moving rack; 10. Sleeve; 11. Ring; 12. Telescopic rod; 13. Center block; 14. Fan blade; 15. Rotating rod; 16. Fixed cylinder; 17. Swinging rod; 18. Fixed rod; 19. Round rod; 20. Movable hole; 21. Thin rod; 22. Fixed frame; 23. Concave wheel; 24. Rubber strip; 25. Push rod; 26. Push block; 27. Curved rod; 28. Movable block; 29. ​​Movable block; 30. Horizontal groove; 31. Insert rod; 32. Slot; 33. Push groove. DETAILED DESCRIPTION

[0024] 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 intended to limit the present invention.

[0025] like Figure 1 - Figure 6 As shown, a four-pipe air-cooled screw unit of the present embodiment includes a unit housing 1 and a stand 2, the stand 2 is arranged on one side of the unit housing 1, a plurality of vents 3 are arranged on the top of the unit housing 1, and an adjustment device for adjusting the airflow path is sleeved outside each vent 3, the adjustment device includes a sleeve 10, a ring 11, a telescopic rod 12, a center block 13, a plurality of fan blades 14, a plurality of rotating rods 15, a plurality of fixed cylinders 16, a plurality of swinging rods 17 and a plurality of fixed rods 18, the sleeve 10 is sleeved outside the vent 3, the middle The core block 13 is arranged in the middle position of the sleeve 10, and three thin rods 21 are fixedly connected to the inner wall of the sleeve 10. The three thin rods 21 are fixedly connected to the bottom wall of the center block 13 away from the top wall at one end of the sleeve 10, and the three thin rods 21 are respectively located in the middle positions of the three fan blades 14. The thin rods 21 will support the center block 13, thereby ensuring the stability of the center block 13. At the same time, since the position of the thin rods 21 is in the middle position of the fan blades 14, when the fan blades 14 rotate, the thin rods 21 will not affect the airflow path of the vent 3.

[0026] The ring 11 is sleeved on the outside of the sleeve 10 and is rotatably connected to the outside of the sleeve 10. A number of fixed frames 22 are fixedly connected to the outer wall of the sleeve 10. The fixed frames 22 are "U"-shaped, and the openings of the fixed frames 22 are facing away from the sleeve 10. A cam 23 is rotatably connected in the fixed frames 22. The ring 11 is rotatably connected to the side walls of the cams 23, and the bottom wall of the ring 11 is against the side walls of the cams 23. In order to ensure the rotation stability of the ring 11, the cams 23 are arranged on the side walls of the sleeve 10. The ring 11 stuck in the cams 23 and rotating can be supported by the cams 23, and the smoothness of the ring 11 during rotation can also be ensured.

[0027] The telescopic rod 12 is fixedly connected to the outer side wall of the circular ring 11, and the bottom wall of one end of the telescopic rod 12 away from the circular ring 11 is rotatably connected to the round rod 19, and several fixed rods 18 are also fixedly connected to the side wall of the circular ring 11. The fan blades 14 are designed to be narrow at one end and wide at the other end. The narrow end of each fan blade 14 is rotatably connected to the side wall of the center block 13, and the wide end of the fan blade 14 is fixedly connected to one end of the rotating rod 15. The side walls of several fan blades 14 are respectively fixedly connected with rubber strips 24, and the length of the rubber strips 24 is consistent with the length of the fan blades 14. When the fan blades 14 are rotated to a closed state, small gaps will inevitably appear between the fan blades 14, and the deformable rubber strips 24 can block the gaps, thereby preventing external dust and debris from entering the vent 3.

[0028] A number of fixed tubes 16 are respectively arranged on the side walls of the sleeve 10, and a number of rotating rods 15 extend out of the sleeve 10 through the number of fixed tubes 16 at one end away from the fan blades 14. A number of rotating rods 15 are respectively fixedly connected to the side walls of one end of a number of swing rods 17 at one end away from the fan blades 14. The side walls of the swing rods 17 are provided with movable holes 20, and a number of fixed rods 18 are respectively located in the number of movable holes 20. The shape of the fixed rod 18 is cylindrical, and the movable hole 20 inside the swing rod 17 is a waist-shaped hole. Since the round rod 19 will drive the ring 11 to rotate, the fixed rod 18 fixed on the side wall of the ring 11 will drive the movable hole 20 and the swing rod 17 to swing. In order to adapt to the cylindrical fixed rod 18, it is necessary to set the movable hole 20 to be a waist-shaped hole with arcs at both ends.

[0029] A heightening frame 4 is arranged on the top of the stand 2, and an electric push rod 5 is installed on the top wall of the stand 2, and the electric push rod 5 is located at the bottom of the heightening frame 4. A dual-axis motor 6 is installed on the top of the heightening frame 4, and the two output ends of the dual-axis motor 6 are respectively fixedly connected with rotating gears 7. The model of the dual-axis motor 6 can be Haydon Kerk Size 14 or 17, so the staff can control one of the output shafts separately. Two limiting grooves 8 are arranged on the top wall of the heightening frame 4, and moving racks 9 are respectively slidably connected in the two limiting grooves 8. The two rotating gears 7 are respectively meshed with the two moving racks 9, and both ends of the limiting grooves 8 are open, and the moving racks 9 can move back and forth freely in the limiting grooves 8.

[0030] The end of the moving rack 9 facing the vent 3 is provided with a control mechanism for respectively adjusting the air flow path, the control mechanism includes a push rod 25, a push block 26, a curved rod 27, a movable block 28 and a movable block 29, the push rod 25 is fixedly connected to the output end of the electric push rod 5, the push rod 25 is fixedly connected to the top wall of the push block 26 at one end away from the electric push rod 5, a transverse groove 30 is provided on the top wall of the unit housing 1, the push block 26, the movable block 28 and the movable block 29 are all slidably connected to the inner wall of the transverse groove 30, and two push grooves 33 are provided on the top wall of the unit housing 1, the push groove 33 is connected to the side wall of the transverse groove 30, the push groove 33 is consistent in size with the movable block 28, the position of the push groove 33 corresponds to the position of the movable block 28, the push groove 33 can accommodate the movable block 28 after being pushed out by the curved rod, so the width of the push groove 33 is greater than the width of the movable block 28.

[0031] The curved rod 27 is "L"-shaped, one end of the curved rod 27 is fixedly connected to the moving rack 9, and the other end is fixedly connected to the top wall of the movable block 28. The two ends of the movable block 28 are respectively inserted into the side walls of the moving block 29 and the side walls of the pushing block 26. The ends of the round rods 19 away from the telescopic rod 12 are respectively fixedly connected to the top walls of the moving block 29, and the two ends of the movable block 28 are respectively fixedly connected with the insertion rods 31. The side wall of the pushing block 26 facing the movable block 28 is provided with a slot 32, and the side wall of the moving block 29 facing the movable block 28 is also provided with a slot 32. The two insertion rods 31 are respectively inserted into the two slots 32. There are many ways to ensure the insertion relationship between the movable block 28 and the moving block 29. The method of the insertion rod 31 and the slot 32 proposed here is a very common one. The slot 32 is not open at both ends. The end facing the push groove 33 is closed, and the end facing the push groove 33 is open, which facilitates the insertion rod 31 and the movable block 28 to leave and enter the slot 32.

[0032] The working principle of this embodiment is as follows: first, according to the operation status of the unit, it is selected whether to let all units run at full speed. If half of the units do not need to run at full speed, one of the output ends of the dual-axis motor 6 can be controlled to run, and the rotating gear 7 fixedly connected thereto will drive the moving rack 9 to slide along the limiting groove 8, and the running moving rack 9 will drive the curved rod to move away from the stand 2, thereby making the movable block 28 at the other end of the curved rod move along the push groove 33, and the insertion rod 31 on the side wall of the movable block 28 will leave the slot 32. After the movable block 28 enters the push groove 33, the group of adjustment devices corresponding to the movable block 28 will no longer be controlled; At this time, the electric push rod 5 is started. The operation of the electric push rod 5 will cause the push rod 25 to drive the push block 26 to move along the transverse groove 30. Since the other set of movable blocks 28 is still connected to the movable block 29 and the push block 26, the movement of the push block 26 will drive the movable block 28 and the push block 26 to move together, and then the round rod 19 on the top wall of the movable block 29 drives the telescopic rod 12 to move along the transverse groove 30. Since the circular ring 11 is movably sleeved outside the sleeve 10, the movement of the telescopic rod 12 will drive the circular ring 11 to rotate together, and then the fixed rod 18 fixed outside the circular ring 11 drives the swing rod 17 to rotate around the rotating rod 15, and the rotation of the rotating rod 15 will drive the fan blades 14 to rotate together, thereby changing the airflow path of the vent 3.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A four-pipe air-cooled screw unit, comprising a unit housing (1) and a stand (2), characterized in that: The stand (2) is arranged on one side of the unit housing (1); a plurality of vents (3) are arranged on the top of the unit housing (1); an adjustment device for adjusting the airflow path is sleeved outside each of the vents (3); an elevation frame (4) is arranged on the top of the stand (2); an electric push rod (5) is arranged on the top wall of the stand (2); the electric push rod (5) is located at the bottom of the elevation frame (4); a double-axis motor (6) is arranged on the top of the elevation frame (4); two output ends of the double-axis motor (6) are respectively fixedly connected to rotating gears (7); two limiting grooves (8) are arranged on the top wall of the elevation frame (4); moving racks (9) are respectively slidably connected in the two limiting grooves (8); the two rotating gears (7) are respectively meshed with the two moving racks (9); and a control mechanism for respectively adjusting the airflow path is arranged on one end of the moving rack (9) facing the vents (3).

2. The four-pipe air-cooled screw unit according to claim 1, characterized in that: The adjustment device comprises a sleeve (10), a ring (11), a telescopic rod (12), a center block (13), a plurality of fan blades (14), a plurality of rotating rods (15), a plurality of fixed sleeves (16), a plurality of swinging rods (17) and a plurality of fixed rods (18). The sleeve (10) is sleeved outside the vent (3). The center block (13) is arranged in the middle of the sleeve (10). The ring (11) is sleeved outside the sleeve (10) and is rotatably connected to the outside of the sleeve (10). The telescopic rod (12) is fixedly connected to the outer side wall of the ring (11). The bottom wall of one end of the telescopic rod (12) away from the ring (11) is rotatably connected to a round rod (19). The plurality of fixed rods (18) are also fixedly connected to the outer side wall of the ring (11). The side wall of the ring (11), the fan blade (14) is designed to be narrow at one end and wide at the other end, the narrow end of each fan blade (14) is rotatably connected to the side wall of the center block (13), the wide end of the fan blade (14) is fixedly connected to one end of a rotating rod (15), a plurality of fixed cylinders (16) are respectively arranged on the side wall of the sleeve (10), the ends of the plurality of rotating rods (15) away from the fan blade (14) respectively pass through the plurality of fixed cylinders (16) and extend to the outside of the sleeve (10), the ends of the plurality of rotating rods (15) away from the fan blade (14) are respectively fixedly connected to the side wall of one end of a plurality of swinging rods (17), the side wall of the swinging rod (17) is provided with a movable hole (20), and the plurality of fixed rods (18) are respectively located in the plurality of movable holes (20).

3. The four-pipe air-cooled screw unit according to claim 2, characterized in that: Three thin rods (21) are fixedly connected to the inner wall of the sleeve (10); the top wall of the three thin rods (21) at one end away from the sleeve (10) is respectively fixedly connected to the bottom wall of the center block (13); and the three thin rods (21) are respectively located in the middle of the three fan blades (14).

4. The four-pipe air-cooled screw unit according to claim 2, characterized in that: The outer wall of the sleeve (10) is fixedly connected to a plurality of fixed frames (22), the fixed frames (22) are U-shaped, the opening of the fixed frames (22) faces in a direction away from the sleeve (10), a concave wheel (23) is rotatably connected in the fixed frame (22), the circular ring (11) is rotatably connected to the side walls of the plurality of concave wheels (23), and the bottom wall of the circular ring (11) abuts against the side wall of the concave wheel (23).

5. The four-pipe air-cooled screw unit according to claim 2, characterized in that: The side walls of the plurality of fan blades (14) are respectively fixedly connected with rubber strips (24), and the length of the rubber strips (24) is consistent with the length of the fan blades (14).

6. The four-pipe air-cooled screw unit according to claim 2, characterized in that: The fixing rod (18) is cylindrical in shape, and the movable hole (20) inside the swing rod (17) is a waist-shaped hole.

7. The four-pipe air-cooled screw unit according to claim 2, characterized in that: The control mechanism comprises a push rod (25), a push block (26), a curved rod (27), a movable block (28) and a motion block (29); the push rod (25) is fixedly connected to the output end of the electric push rod (5); the end of the push rod (25) away from the electric push rod (5) is fixedly connected to the top wall of the push block (26); a transverse groove (30) is provided on the top wall of the unit housing (1); the push block (26), the movable block (28) and the motion block (29) are all slidably connected to the inner wall of the transverse groove (30); the top wall of the unit housing (1) is provided with two push grooves (33); The groove (33) is communicated with the side wall of the transverse groove (30); the push groove (33) is consistent with the size of the movable block (28); the position of the push groove (33) corresponds to the position of the movable block (28); the curved rod (27) is "L"-shaped; one end of the curved rod (27) is fixedly connected to the moving rack (9); the other end is fixedly connected to the top wall of the movable block (28); the two ends of the movable block (28) are respectively inserted into the side wall of the moving block (29) and the side wall of the push block (26); and the ends of the plurality of round rods (19) away from the telescopic rod (12) are respectively fixedly connected to the top wall of the moving block (29).

8. The four-pipe air-cooled screw unit according to claim 7, characterized in that: Insertion rods (31) are fixedly connected to both ends of the movable block (28), a slot (32) is provided on a side wall of one end of the push block (26) facing the movable block (28), and a slot (32) is also provided on a side wall of one end of the motion block (29) facing the movable block (28), and the two insertion rods (31) are respectively inserted into the two slots (32).

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