Two-stage screw refrigerating machine

Abstract

The utility model discloses a two-stage screw rod type refrigerating machine, which comprises a support base, a gas storage tank, a shell, a first screw rod shaft, a second screw rod shaft, a control box and a power motor, support frames are symmetrically arranged on two sides of the upper end of the support base, the gas storage tank is fixed at the upper end of the support frames, and the shell is fixed at the upper end of the gas storage tank. A first rotating shaft is rotatably connected to the upper end of the shell, a second rotating shaft is rotatably connected to the lower end of the shell, a first screw shaft is connected to the outside of the first rotating shaft, a second screw shaft is connected to the outside of the second rotating shaft, and a filter box is fixed to the upper end of the shell. According to the two-stage screw type refrigerating machine, through the design of the two-stage screw structure, the stability and the working efficiency can be improved, the effects of being simple in structure, small in size, capable of relieving the maintenance burden and the like are achieved, meanwhile, power is synchronously provided for the multiple sets of screw shafts through a transmission structure, arrangement of a power source is reduced, the cost is reduced, and meanwhile the overall failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerators, in particular to a double-stage screw refrigerator. Background Art

[0002] The screw two-stage refrigeration compressor is a two-stage refrigeration equipment, also known as dual-cycle refrigeration equipment or screw two-stage refrigerator. The two-stage refrigeration cycle on the market is mostly developed on the basis of the single-stage refrigeration cycle. The compression process is carried out in two stages. The refrigerant vapor from the evaporator first enters the low-pressure cylinder and is compressed to the intermediate pressure. After intermediate cooling, it enters the high-pressure cylinder and is compressed to the condensing pressure and enters the condenser. However, there are still some problems when using the existing two-stage screw refrigerator.

[0003] The refrigeration system of the present invention is a screw machine double-circulation refrigeration device with Chinese patent publication number CN201922021210.X, which includes a screw two-stage refrigeration compressor, a U-shaped base is provided at the bottom of the screw two-stage refrigeration compressor, and the same rectangular box seat is slidably installed between the inner walls of both sides of the U-shaped base, the bottom of the rectangular box seat is set to an opening, and the top of the rectangular box seat extends to the top of the U-shaped base and is fixedly connected to the bottom of the screw two-stage refrigeration compressor. A plurality of support rods are fixedly connected to the bottom inner wall of the U-shaped base, and the top ends of the plurality of support rods are fixedly connected to the same cross plate, which is adapted to the rectangular box seat; however, when the existing two-stage screw refrigerator is used, the multi-stage screw air delivery structure needs to be separately provided with a power source, which has relatively high cost and high failure rate. At the same time, high temperature will be generated between the transmission structures when rotating at high speed. If the heat cannot be effectively dissipated, the service life of the transmission structure will inevitably be affected.

[0004] Therefore, we proposed a two-stage screw refrigerator to solve the above problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a two-stage screw refrigerator to solve the problem proposed in the above background technology that the existing two-stage screw refrigerator needs to be equipped with multiple power sources when in use, and the transmission rod structure will generate high temperature when rotating at high speed, which will inevitably affect the service life of the transmission structure.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a two-stage screw refrigerator, comprising a support base, a gas storage tank, a housing, a first screw shaft, a second screw shaft, a control box and a power motor:

[0007] Support frames are symmetrically mounted on both sides of the upper end of the support base, and a gas storage tank is fixed on the upper end of the support frame, and a shell is fixed on the upper end of the gas storage tank, the upper end of the shell is rotatably connected to the first rotating shaft, and the lower end of the shell is rotatably connected to the second rotating shaft;

[0008] The first rotating shaft is externally connected to a first screw shaft, and the second rotating shaft is externally connected to a second screw shaft. A filter box is fixed to the upper end of the shell, and an air intake pipe is connected between the filter box and the shell, and a guide pipe is connected between the lower end of the shell and the air storage tank.

[0009] A power motor is installed on the left side of the support base, and a control box is fixed on the rear end of the shell.

[0010] Preferably, two groups of the first screw shaft and the second screw shaft are provided, and the first screw shaft and the second screw shaft are symmetrically distributed on the front and back sides of the shell, and the left end of the first screw shaft is fixedly connected to the power motor.

[0011] By adopting the above technical solution, a two-stage screw air compression structure is formed by cooperating between two sets of first screw shafts and two sets of second screw shafts, and a power motor is used to provide power for the two sets of first rotating shafts and second rotating shafts.

[0012] Preferably, a first pulley is fixed to the right end of the first rotating shaft on the rear side, and a second pulley is fixed to the right end of the second rotating shaft on the rear side, and a transmission belt is connected between the first pulley and the second pulley.

[0013] By adopting the above technical solution, the power motor drives the first rotating shaft to rotate, and the rotation of the first rotating shaft drives the first pulley to rotate. The cooperation between the first pulley, the second pulley and the transmission belt facilitates the synchronous rotation of the first rotating shaft and the second rotating shaft.

[0014] Preferably, a filter screen is snap-connected inside the filter box, the filter screen is snap-connected to the filter box, and the upper end of the filter screen is bolted to the filter box.

[0015] By adopting the above technical solution, the intake air can be easily filtered through the cooperation between the filter screen and the filter box.

[0016] Preferably, transmission gears are fixed to the left ends of the first rotating shaft and the second rotating shaft, and the two sets of transmission gears on the left side of the first rotating shaft are meshed and connected, and the two sets of transmission gears on the left side of the second rotating shaft are meshed and connected.

[0017] By adopting the above technical solution, the two sets of transmission gears can cooperate to facilitate the synchronous rotation of the two sets of first rotating shafts and second rotating shafts, thereby ensuring that the two sets of first screw shafts and second screw shafts can rotate in opposite directions.

[0018] Preferably, a first impeller is fixed to the left end of the first rotating shaft on the front side, and a second impeller is fixed to the left side of the second rotating shaft on the rear side. An air intake grille is provided at the upper left end of the shell, and an air outlet grille is provided at the lower left end of the shell. The first impeller and the second impeller are arranged in opposite directions.

[0019] By adopting the above technical solution, the first impeller and the second impeller can rotate synchronously with the first rotating shaft and the second rotating shaft through the cooperation between the first impeller and the second impeller, and the impeller drives the air into the shell through the air intake grille and is discharged through the air outlet grille to dissipate heat for the internal transmission structure.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the two-stage screw refrigerator;

[0021] 1. The design of the two-stage screw structure can improve stability and work efficiency, and has the effects of simple structure, miniaturization, and reduced maintenance burden. At the same time, the transmission structure is used to synchronously provide power to multiple sets of screw shafts, reducing the setting of power sources, reducing costs and reducing the overall failure rate;

[0022] 2. The rotation of the screw shaft synchronously provides rotational power for the two sets of impellers, and the impellers are used to accelerate the flow of air inside the left side of the shell, and cool the transmission structure to improve the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front structural diagram of the utility model;

[0024] Figure 2 This is a rear view structural diagram of the utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the shell of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the first rotating shaft and transmission gear of the utility model;

[0027] Figure 5 This is a schematic diagram of the transmission gear and impeller structure of the utility model.

[0028] In the figure: 1. Support base; 2. Support frame; 3. Gas tank; 4. Shell; 5. First rotating shaft; 6. Second rotating shaft; 7. First screw shaft; 8. Second screw shaft; 9. First pulley; 10. Drive belt; 11. Second pulley; 12. Air intake pipe; 13. Filter box; 14. Filter screen; 15. Guide pipe; 16. Control box; 17. Power motor; 18. Air intake grille; 19. Air outlet grille; 20. Drive gear; 21. First impeller; 22. Second impeller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-5 The utility model provides a technical solution: a two-stage screw refrigerator, comprising a support base 1, a gas storage tank 3, a shell 4, a first screw shaft 7, a second screw shaft 8, a control box 16 and a power motor 17. Support frames 2 are symmetrically installed on both sides of the upper end of the support base 1, and the gas storage tank 3 is fixed on the upper end of the support frame 2, and the shell 4 is fixed on the upper end of the gas storage tank 3. The upper end of the shell 4 is rotatably connected to the first rotating shaft 5, and the lower end of the shell 4 is rotatably connected to the second rotating shaft 6; the first rotating shaft 5 is externally connected to the first screw shaft 7, and the second rotating shaft 6 is externally connected to the second screw shaft 8. The first screw shaft 7 and the second screw shaft 8 are each provided with two groups, and the first screw shaft 7 and the second screw shaft 8 are symmetrically distributed on the front and back sides of the shell 4, and the left end of the first screw shaft 7 is fixedly connected to the power motor 17; the rear A first pulley 9 is fixed to the right end of a rotating shaft 5, and a second pulley 11 is fixed to the right end of the rear second rotating shaft 6, and a transmission belt 10 is connected between the first pulley 9 and the second pulley 11; a power motor 17 is installed on the left side of the support base 1, and a control box 16 is fixed to the rear end of the shell 4; the gas tank 3 can be supported and installed by the support base 1 and the support frame 2, and the shell 4 installed at the upper end of the gas tank 3 can fix the first screw shaft 7 and the second screw shaft 8, and the power motor 17 can provide rotational power to the first rotating shaft 5, and the rear first rotating shaft 5 and the rear second rotating shaft 6 can rotate synchronously through the cooperation of the first pulley 9, the second pulley 11 and the transmission belt 10, and the first rotating shaft 5 and the second rotating shaft 6 can drive the first screw shaft 7 and the second screw shaft 8 to rotate synchronously when rotating.

[0031] The left ends of the first rotating shaft 5 and the second rotating shaft 6 are both fixed with transmission gears 20, and the two groups of transmission gears 20 on the left side of the first rotating shaft 5 are meshed and connected, and the two groups of transmission gears 20 on the left side of the second rotating shaft 6 are meshed and connected; a filter box 13 is fixed to the upper end of the shell 4, and an air intake pipe 12 is connected between the filter box 13 and the shell 4, and a guide pipe 15 is connected between the lower end of the shell 4 and the air storage tank 3; a filter screen 14 is engaged with the inside of the filter box 13, and the filter screen 14 is engaged with the filter box 13, and the upper end of the filter screen 14 is bolted to the filter box 13; through the cooperation of multiple groups of transmission gears 20, the two groups of first rotating shafts 5 and second rotating shafts 6 can be kept in synchronous rotation, and the first rotating shaft 5 and second rotating shaft 6 rotate in opposite directions, thereby continuously delivering air to the inside of the air storage tank 3, and supplying air to the inside of the shell 4 through the filter box 13 and the air intake pipe 12, and the filter screen 14 provided inside the filter box 13 can prevent foreign matter from entering the inside of the shell 4.

[0032] A first impeller 21 is fixed to the left end of the front first rotating shaft 5, and a second impeller 22 is fixed to the left side of the rear second rotating shaft 6. An air intake grille 18 is provided at the upper left end of the shell 4, and an air outlet grille 19 is provided at the lower left end of the shell 4. The first impeller 21 and the second impeller 22 are arranged in opposite directions; through the cooperation between the first impeller 21 and the second impeller 22, the first impeller 21 and the second impeller 22 can be driven to rotate synchronously when the first rotating shaft 5 and the second rotating shaft 6 rotate, and the first impeller 21 and the second impeller 22 can be used to synchronously use the air intake grille 18 to draw external air into the interior of the shell 4, and dissipate heat to the transmission structure inside the shell 4, and discharge it through the air outlet grille 19.

[0033] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0034] 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 scope of protection of the present invention.

Claims

1. A two-stage screw refrigerator, comprising a support base (1), a gas storage tank (3), a housing (4), a first screw shaft (7), a second screw shaft (8), a control box (16) and a power motor (17), characterized in that: Support frames (2) are symmetrically mounted on both sides of the upper end of the support base (1), and a gas storage tank (3) is fixed to the upper end of the support frame (2), and a shell (4) is fixed to the upper end of the gas storage tank (3), the upper end of the shell (4) is rotatably connected to a first rotating shaft (5), and the lower end of the shell (4) is rotatably connected to a second rotating shaft (6); The first rotating shaft (5) is externally connected to a first screw shaft (7), and the second rotating shaft (6) is externally connected to a second screw shaft (8); a filter box (13) is fixed to the upper end of the housing (4), an air intake pipe (12) is connected between the filter box (13) and the housing (4), and a flow guide pipe (15) is connected between the lower end of the housing (4) and the air storage tank (3); A power motor (17) is installed on the left side of the support base (1), and a control box (16) is fixed to the rear end of the housing (4).

2. A two-stage screw refrigerator according to claim 1, characterized in that: The first screw shaft (7) and the second screw shaft (8) are both provided in two groups, and the first screw shaft (7) and the second screw shaft (8) are symmetrically distributed on the front and rear sides of the housing (4), and the left end of the first screw shaft (7) is fixedly connected to the power motor (17).

3. A two-stage screw refrigerator according to claim 2, characterized in that: A first pulley (9) is fixed to the right end of the first rotating shaft (5) at the rear side, and a second pulley (11) is fixed to the right end of the second rotating shaft (6) at the rear side, and a transmission belt (10) is connected between the first pulley (9) and the second pulley (11).

4. A two-stage screw refrigerator according to claim 3, characterized in that: The filter box (13) is internally engaged with a filter screen (14), and the filter screen (14) is engaged with the filter box (13), and the upper end of the filter screen (14) is bolted to the filter box (13).

5. The two-stage screw refrigerator according to claim 1, characterized in that: The left ends of the first rotating shaft (5) and the second rotating shaft (6) are both fixed with transmission gears (20), and the two sets of transmission gears (20) on the left side of the first rotating shaft (5) are meshed and connected, and the two sets of transmission gears (20) on the left side of the second rotating shaft (6) are meshed and connected.

6. The two-stage screw refrigerator according to claim 1, characterized in that: A first impeller (21) is fixed to the left end of the first rotating shaft (5) on the front side, and a second impeller (22) is fixed to the left side of the second rotating shaft (6) on the rear side. An air inlet grille (18) is provided at the upper left end of the housing (4), and an air outlet grille (19) is provided at the lower left end of the housing (4). The first impeller (21) and the second impeller (22) are arranged in opposite directions.

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