An evaporator for a snow ice maker

Abstract

The present invention discloses an evaporator for a snow ice maker, comprising: a cylinder, on one side of which a driving shaft is penetrated, and on the other side of which a sealing mechanism is penetrated; a driving shaft, a first bearing is sleeved in a cup-shaped opening at one end thereof, and a first fixing member is arranged on the driving shaft through a second bearing; a fixed shaft, one end of which is rotationally sleeved with the driving shaft through a first bearing, and the other end of which penetrates outside the sealing mechanism, and a second fixing member is arranged on the shaft body of the section penetrating the sealing mechanism; a refrigerant spray pipe, which is installed on the fixed shaft inside the cylinder through a spray pipe bracket, and a capillary tube passes through a refrigerant channel in the fixed shaft and is connected to the refrigerant spray pipe. The evaporator for the snow ice maker of the present invention is simplified and optimized in structure. Compared with the prior art, the defect of its complex process is solved, and under the condition of long-term operation, the stability is greatly improved, and at the same time, the production cost is also greatly reduced.

Description

Technical Field

[0001] The invention belongs to the field of ice making machines, in particular to an evaporator for a flake ice making machine. Background Art

[0002] For example, in a rotary cylinder evaporator of a flake ice machine with application number 201721263938.8, the refrigerant evaporates and exchanges heat with the cylinder inside the rotating cylinder, and the ice-making water is cooled into ice on the outer wall of the cylinder. The ice attached to the outer wall of the cylinder is then scraped off with an ice knife to form fine flakes of ice.

[0003] The disadvantages of this rotary drum evaporator are:

[0004] 1. In order to ensure the seal between the rotating cylinder and the central axis, a very complex sealing structure is designed, which has a large number of parts and a high production cost.

[0005] 2. The production process is relatively complicated, which can easily lead to failures. For example, the O-rings set on multiple contact interfaces, and the large number of limiters and fixings configured on the dynamic and static rings, these parts will expand and contract when the ice maker switches between the standby state and the working state. The different coefficients of thermal expansion and contraction between parts of different materials are also one of the hidden dangers of failure; for example, the spring seat set on the side of the dynamic ring, its asymmetric design is prone to uneven wear and failure during the process of pressure friction, and under the non-uniform force working state, the deformation of the components in different force directions is also inconsistent. The long-term existence of this deformation is not conducive to the stable operation of the equipment.

[0006] 3. There is a connection node between the nozzle and the central axis, and no sealing device is set at the node. Once the refrigerant leaks, the leaked refrigerant can be easily discharged directly from the refrigerant discharge port near the connection node, reducing the refrigeration efficiency. Summary of the invention

[0007] In order to overcome the disadvantage that the sealing structure of the evaporator in the prior art is too complicated, the present invention provides an evaporator for a flake ice maker.

[0008] The technical solution adopted by the present invention to solve the technical problem is: an evaporator for a snowflake ice making machine, comprising:

[0009] A cylinder, a fixed shaft is passed through the inside of the cylinder, a first through hole is opened on one side of the cylinder and a driving shaft is passed through the first through hole, a second through hole is opened on the other side of the cylinder, and a sealing mechanism is arranged in the second through hole;

[0010] A drive shaft, one end of which is provided with a cup-shaped opening and is sleeved inside the cylinder through the first through hole of the cylinder, a first bearing is sleeved inside the cup-shaped opening, and a first fixing member is provided on the shaft body of the drive shaft located outside the cylinder through a second bearing;

[0011] A fixed shaft, one end of which is installed in the cup-shaped opening of the driving shaft through the first bearing of the driving shaft, and the other end of which passes through the sealing mechanism at the second through hole of the cylinder through the third bearing located in the sealing mechanism, and a second fixing piece is arranged on the shaft body passing through the sealing mechanism;

[0012] The refrigerant spray pipe is installed on the fixed shaft inside the cylinder through a spray pipe bracket. A refrigerant channel is arranged inside the fixed shaft. The capillary tube passes through the refrigerant channel and is connected with the refrigerant spray pipe.

[0013] The sealing mechanism includes a set of mechanical seals, an auxiliary seal, and a sealing ring:

[0014] The mechanical seal comprises a static module and a dynamic module;

[0015] The auxiliary seal has an external thread on its head, and the second through hole of the cylinder is provided with an internal thread matching the external thread of the head of the auxiliary seal. The head of the auxiliary seal is screwed into the second through hole of the cylinder through a threaded connection. The outer diameter of the middle part of the seal is larger than the outer diameter of its head to form a ring-shaped protruding platform. An annular sealing ring groove is provided at the inner edge of the front side of the annular protruding platform for installing a sealing ring to achieve sealing between the cylinder and the auxiliary seal.

[0016] The axial middle part of the seal is a through hole, the aperture of the through hole at the head of the seal matches the outer diameter of the moving module of the mechanical seal, the aperture of the through hole at the middle of the seal is larger than the aperture of the inner ring hole of the mechanical seal and smaller than the outer diameter of the moving module of the mechanical seal, and the aperture of the through hole at the tail of the seal matches the outer diameter of the third bearing,

[0017] The third bearing is sleeved in the through hole at the tail end of the auxiliary seal and between the auxiliary seal and the fixed shaft. The dynamic module of the mechanical seal is sleeved in the through hole at the head end of the auxiliary seal and between the auxiliary seal and the fixed shaft. The static module of the mechanical seal is sleeved on the fixed shaft and directly in front of the dynamic module of the mechanical seal to achieve sealing between the fixed shaft and the auxiliary seal.

[0018] Furthermore, an annular retaining ring groove is provided on the inner wall of the through hole at the tail end of the auxiliary seal provided with the third bearing, and the groove is used to install an elastic retaining ring to prevent the third bearing from falling out backwards.

[0019] The outer diameter of the fixed shaft where the mechanical seal is sleeved matches the aperture of the inner ring hole of the mechanical seal, and the outer diameter of the fixed shaft in front of the mechanical seal is slightly larger than the aperture of the inner ring hole of the mechanical seal, thereby forming a step at this location as a limiting structure of the mechanical seal to prevent the mechanical seal from sliding forward when subjected to force and thus failing to seal;

[0020] The outer diameter of the place where the third bearing is sleeved on the fixed shaft matches the aperture of the inner ring hole of the third bearing.

[0021] A bearing through hole matching the outer diameter of the second bearing is provided in the middle of the first fixing member, which is used for sleeved the fixing member on the outer side of the second bearing, and at least three mounting holes are provided on the fixing member around the bearing through hole; a fixed shaft through hole matching the outer diameter of the fixed shaft is provided in the middle of the second fixing member, which is used for sleeved the second fixing member on the corresponding position on the fixed shaft, and at least three mounting holes are provided on the fixing member around the fixed shaft through hole, and the mounting holes provided on the first fixing member and the second fixing member are both used for installing the evaporator in the ice maker.

[0022] Furthermore, the refrigerant spray pipe is provided with a plurality of refrigerant spray holes.

[0023] The beneficial effects of the present invention are as follows: the evaporator for a snowflake ice making machine of the present invention is simplified and optimized in structure, and compared with the prior art, the defect of complex process is solved and the stability is greatly improved under long-term operation conditions.

[0024] The details are as follows:

[0025] 1. The structure of the sealing mechanism between the cylinder and the fixed shaft is simpler, avoiding the use of a large number of sealing rings, limiters and fixings, wherein the required limiter structure is formed by changing the outer diameter of the fixed shaft or the aperture of the through hole of the auxiliary seal. While ensuring the sealing performance requirements, the use of fewer discrete components and a simpler structure can greatly reduce the probability of failure.

[0026] 2. The rotating parts involved in the operation of the evaporator are all symmetrical structures, and their mechanical properties are more stable, which further reduces the probability of failure and prolongs the service life of the evaporator.

[0027] 3. The head of the auxiliary seal is connected to the rear plate of the cylinder by threads. This structure provides the pressure required by the sealing ring and the mechanical seal at the same time. Compared with the solution of setting a limit ring in the prior art, the structure is more stable and easy to install.

[0028] 4. The refrigerant nozzle is fixed to the fixed shaft by a connecting rod, and the capillary tube providing the refrigerant is directly connected to the nozzle. Even if leakage occurs at the connection between the capillary tube and the nozzle, the refrigerant leaked therefrom has a sufficiently high probability of exchanging heat with the cylinder and then being discharged from the refrigerant channel on the fixed shaft, and the effect on the refrigeration efficiency can be almost ignored. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 2 is a cross-sectional view of the evaporator in the embodiment.

[0030] Figure 2 for Figure 1 A partial enlarged schematic diagram of point P in the middle.

[0031] Figure 3 for Figure 1 Schematic diagram of the middle cylinder.

[0032] Figure 4 for Figure 1 An exploded view of the drive shaft and the first bearing, the first fixing member and the third bearing.

[0033] Figure 5 for Figure 1 Exploded view of the middle fixed shaft and the second fixing member.

[0034] Figure 6 for Figure 2 Exploded view of the middle seal mechanism and the second bearing.

[0035] Description of the figure number:

[0036] 10. Cylinder, 11. First through hole, 12. Second through hole,

[0037] 20. Drive shaft, 21. Second bearing, 210. Second bearing inner ring hole, 22. First fixing member, 220. Bearing through hole, 23. Cup-shaped opening, 24. First bearing, 240. First bearing inner ring hole,

[0038] 30. Fixed shaft, 31. Refrigerant channel, 32. Second fixing member, 320. Second fixing member through hole, 33. Third bearing, 330. Third bearing inner ring hole,

[0039] 40. Refrigerant nozzle, 41. Nozzle bracket,

[0040] 50. Sealing mechanism, 51. Mechanical seal, 510. Moving module, 511. Static module, 512. Inner ring hole of mechanical seal,

[0041] 52. Auxiliary seal, 520. Through hole, 521. Auxiliary seal head, 522. Protruding platform, 523. Auxiliary seal tail, 53. Sealing ring, 530. Sealing ring groove, 54. Elastic retaining ring, 540. Retaining ring groove,

[0042] 60. Capillary tube, 70. Fixing part mounting hole. DETAILED DESCRIPTION

[0043] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0044] like Figure 1 and Figure 2 As shown, the evaporator for the snowflake ice machine of this embodiment includes:

[0045] Cylinder 10, combined Figure 3 As shown, a fixed shaft 30 is passed through the inside thereof, and a first through hole 11 is opened on one side of the cylinder 10 and a driving shaft 20 is passed through it, and a second through hole 12 is opened on the other side of the cylinder 10, and a sealing mechanism 50 is arranged in the second through hole 12;

[0046] Drive shaft 20, combined Figure 4 As shown, a cup-shaped opening 23 is provided at one end thereof, and this end is sleeved inside the cylinder 10 through the first through hole 11 of the cylinder 10, a first bearing 24 is sleeved inside the cup-shaped opening 23, a first fixing member 22 is provided on the shaft body of the drive shaft 20 located outside the cylinder 10 through a second bearing 21, the middle part of the second bearing 21 is an inner ring hole 210, one end of the drive shaft 20 passes through the inner ring hole 210, the second bearing 21 is sleeved on the drive shaft 20, and the cylinder 10 and the drive shaft 20 are sealed and fixedly connected by welding;

[0047] Fixed shaft 30, combined Figure 5 As shown, one end is installed in the cup-shaped opening 23 of the drive shaft 20 through the first bearing 24 of the drive shaft 20, the middle part of the first bearing 24 is an inner circle hole 240, one end of the fixed shaft 30 is inserted into the inner circle hole 240, and the other end passes through the sealing mechanism 50 at the second through hole 12 of the cylinder 10 through the third bearing 33 located in the sealing mechanism 50, and the second fixing member 32 is arranged on the shaft body passing through the sealing mechanism 50;

[0048] The cylinder 10 and the fixed shaft 30 are rotatably sleeved via the third bearing 33 and sealed via the sealing mechanism 50 , and the driving shaft 20 and the fixed shaft 30 are rotatably sleeved via the first bearing 24 in the cup-shaped opening 23 ;

[0049] A refrigerant nozzle 40 is provided with a plurality of refrigerant spray holes (not shown in the figure) and is mounted on the fixed shaft 30 inside the cylinder 10 through a nozzle bracket 41. A refrigerant channel 31 is provided inside the fixed shaft 30. The refrigerant channel 31 extends from an opening at a certain point of the shaft section of the fixed shaft 30 located outside the cylinder 10 to an opening at a certain point of the shaft section of the fixed shaft 30 located inside the cylinder 10. A capillary tube 60 passes through the refrigerant channel 31 and is connected to the refrigerant nozzle 40.

[0050] like Figure 2 and Figure 6 As shown, the sealing mechanism 50 includes a set of mechanical seals 51, an auxiliary seal 52, and a sealing ring 53:

[0051] The mechanical seal 51 includes a static module 511 and a dynamic module 510;

[0052] The auxiliary seal 52 has an external thread (not shown in the figure) on its head 521. The second through hole 12 of the cylinder 10 is provided with an internal thread (not shown in the figure) matching the external thread of the head 521 of the auxiliary seal 52. The head 521 of the auxiliary seal 52 is screwed into the second through hole 12 of the cylinder 10 through a threaded connection. The outer diameter of the middle part 522 of the seal 52 is greater than the outer diameter of the head 521 to form a ring-shaped protruding platform. An annular sealing ring groove 530 is provided at the inner edge of the front side of the annular protruding platform for installing a sealing ring 53 to achieve sealing between the cylinder 10 and the auxiliary seal 52.

[0053] The axial middle part of the seal 52 is a through hole 520, the aperture of the through hole 520 at the seal head 521 matches the outer diameter of the movable module 510 of the mechanical seal 51, the aperture of the through hole 520 at the middle part 522 of the seal is larger than the aperture of the inner ring hole 512 of the mechanical seal 51 and smaller than the outer diameter of the movable module 510 of the mechanical seal 51, that is, the inner wall of the through hole 520 at the middle part 522 of the seal 52 extends inward to form a step, which serves as a limiting structure of the mechanical seal 51, and the aperture of the through hole 520 at the tail 523 of the seal 52 matches the outer diameter of the third bearing 33,

[0054] The third bearing 33 is sleeved in the through hole 520 at the tail 523 of the auxiliary seal 52, between the auxiliary seal 52 and the fixed shaft 30; the moving module 510 of the mechanical seal 51 is sleeved in the through hole 520 at the head 521 of the auxiliary seal 52, between the auxiliary seal 52 and the fixed shaft 30; the static module 511 of the mechanical seal 51 is sleeved on the fixed shaft 30, just in front of the moving module 510 of the mechanical seal 51, for achieving sealing between the fixed shaft 30 and the auxiliary seal 52.

[0055] The mechanical seal 51 can be directly purchased from the market, so the present invention will not describe its specific structure in detail. For example, the 109 series mechanical seal of Xingtai Haonaide Rubber Seals Co., Ltd. It should be understood that those skilled in the art can replace this mechanical seal with a mechanical seal of other companies or other series with the same structure and function.

[0056] Furthermore, an annular retaining ring groove 540 is provided on the inner wall of the through hole 520 at the tail 523 of the auxiliary seal 52 provided with the third bearing 33, and the groove 540 is used to install an elastic retaining ring 54 to prevent the third bearing 33 from falling out backwards.

[0057] like Figure 5 As shown, the outer diameter of the fixed shaft 30 where the mechanical seal 51 is sleeved matches the aperture of the inner circle hole 512 of the mechanical seal 51, and the outer diameter of the fixed shaft 30 in front of the mechanical seal 51 is slightly larger than the aperture of the inner circle hole 512 of the mechanical seal 51, thereby forming a step at this location as a limiting structure of the mechanical seal 51 to prevent the mechanical seal 51 from sliding forward when subjected to force and thus failing to seal;

[0058] The outer diameter of the fixed shaft 30 where the third bearing 33 is sleeved matches the aperture of the inner ring hole 330 of the third bearing 33 .

[0059] like Figure 4 and Figure 5As shown, the middle part of the first fixing member 22 is provided with a bearing through hole 220 matching the outer diameter of the second bearing 21, which is used to sleeve the fixing member 22 on the outer side of the second bearing 21, and at least three mounting holes 70 are provided on the fixing member 22 around the bearing through hole 220; the middle part of the second fixing member 32 is provided with a fixed shaft through hole 320 matching the outer diameter of the fixed shaft 30, which is used to sleeve the second fixing member 32 on the corresponding position on the fixed shaft 30, and at least three mounting holes 70 are provided on the fixing member 32 around the fixed shaft through hole 320, and the mounting holes 70 provided on the first fixing member 22 and the second fixing member 32 are both used to install the evaporator in the ice maker. The mounting holes 70 are generally arranged evenly, so in this embodiment, the mounting holes provided on the first fixing member 22 and the second fixing member 32 are evenly arranged and the number is three.

[0060] The sealing and rotary connection principle of the evaporator:

[0061] The drive shaft 20 is fixed to the cylinder 10 by welding, and the drive shaft 20 is rotatably sleeved with the fixed shaft 30 via the first bearing 24. The cylinder 20 is fixed to the auxiliary seal 52 by threaded connection. After the auxiliary seal 52 is screwed into the second through hole 12, the seal ring 53 is compressed between the cylinder 10 and the protruding platform of the middle part 522 of the auxiliary seal 52, thereby playing the role of sealing the seal ring 53 at this place. At the same time, the mechanical seal 51 is subjected to axial pressure between the fixed shaft 30 and the auxiliary seal 52, thereby achieving sealing between the mechanical seal 51 and the fixed shaft 30 and the auxiliary seal 52. The auxiliary seal 52 is rotatably sleeved with the fixed shaft 30 via a third bearing 33; the static module 511 of the mechanical seal 51 is stationary together with the fixed shaft 30; the dynamic module 510 of the mechanical seal 51 rotates together with the auxiliary seal 52 and the cylinder 10; and when the dynamic module 510 of the mechanical seal 51 rotates, the dynamic module 510 and the static module 511 can still be sealed.

[0062] The main working process of the evaporator:

[0063] When the evaporator is working, the drive shaft 20 drives the cylinder 10 to rotate, and the refrigerant flows into the refrigerant nozzle 40 through the capillary tube 60. The refrigerant is sprayed onto the inner wall of the cylinder 10 by the nozzle 40, and is discharged through the refrigerant channel 31 after evaporation and heat exchange with the cylinder 10, that is, discharged from the space between the outer wall of the capillary tube 60 and the inner wall of the channel 31, and the ice-making water is cooled into ice on the outer wall of the cylinder 10.

Claims

1. An evaporator for a snow ice maker, characterized in that it includes: A cylinder, inside which a fixed shaft is passed through, and a first through hole is opened on one side of the cylinder and a driving shaft is passed through. A second through hole is opened on the other side of the cylinder, and a sealing mechanism is arranged in the second through hole; The driving shaft, one end of which is provided with a cup-shaped opening, and this end is sleeved inside the cylinder through the first through hole of the cylinder. A first bearing is sleeved in the cup-shaped opening. A first fixing member is arranged on the shaft body of the driving shaft outside the cylinder through a second bearing; The fixed shaft, one end of which is installed in the cup-shaped opening of the driving shaft through the first bearing of the driving shaft, and the other end passes through the sealing mechanism at the second through hole of the cylinder through a third bearing inside the sealing mechanism, and a second fixing member is arranged on the shaft body of this section passing through the sealing mechanism; The refrigerant spray pipe is installed on the fixed shaft inside the cylinder through a spray pipe bracket. A refrigerant channel is arranged inside the fixed shaft, and a capillary tube passes through the refrigerant channel and is connected to the refrigerant spray pipe; The sealing mechanism includes a set of mechanical seals, an auxiliary seal, and a sealing ring: The mechanical seal includes a static module and a dynamic module; The auxiliary seal has an external thread at its head. An internal thread matching the external thread of the head of the auxiliary seal is arranged in the second through hole of the cylinder. The head of the auxiliary seal is screwed into the second through hole of the cylinder through thread connection. The outer diameter of the middle part of the seal is larger than the outer diameter of its head, thus forming a ring-shaped protruding platform. A ring-shaped seal groove is arranged at the inner edge of the front surface of the ring-shaped protruding platform for installing a sealing ring to achieve the seal between the cylinder and the auxiliary seal; The axial middle part of the seal is a through hole. The aperture of the through hole at the head of the seal is matched with the outer diameter of the dynamic module of the mechanical seal. The aperture of the through hole in the middle part of the seal is larger than the aperture of the inner ring hole of the mechanical seal and smaller than the outer diameter of the dynamic module of the mechanical seal. The aperture of the through hole at the tail of the seal is matched with the outer diameter of the third bearing; The third bearing is sleeved in the through hole at the tail of the auxiliary seal, between the auxiliary seal and the fixed shaft. The dynamic module of the mechanical seal is sleeved in the through hole at the head of the auxiliary seal, between the auxiliary seal and the fixed shaft. The static module of the mechanical seal is sleeved on the fixed shaft, directly in front of the dynamic module of the mechanical seal, for achieving the seal between the fixed shaft and the auxiliary seal; A plurality of refrigerant spray holes are arranged on the refrigerant spray pipe.

2. The evaporator according to claim 1, characterized in that An annular retaining ring groove is further arranged on the inner wall of the through hole at the tail of the auxiliary seal provided with the third bearing. The groove is used for installing an elastic retaining ring to prevent the third bearing from slipping out backward.

3. The evaporator according to claim 1, characterized in that The outer diameter of the mechanical seal sleeved on the fixed shaft matches the aperture diameter of the inner ring hole of the mechanical seal, and the outer diameter of the fixed shaft in front of the mechanical seal is slightly larger than the aperture diameter of the inner ring hole of the mechanical seal, thereby forming a step at this position as the limiting structure of the mechanical seal to prevent the mechanical seal from sliding forward when stressed and thus failing to play a sealing role; The outer diameter of the third bearing sleeved on the fixed shaft matches the aperture diameter of the inner ring hole of the third bearing.

4. The evaporator according to any one of claims 1-3, characterized in that a bearing through hole matching the outer diameter of the second bearing is provided in the middle of the first fixing member for sleeving the fixing member outside the second bearing, and at least three mounting holes are provided around the bearing through hole on the fixing member; a fixed shaft through hole matching the outer diameter of the fixed shaft is provided in the middle of the second fixing member for sleeving the second fixing member at a corresponding position on the fixed shaft, and at least three mounting holes are provided around the fixed shaft through hole on the fixing member. The mounting holes provided on the first fixing member and the second fixing member are both used to mount the evaporator in the ice maker.

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