Evaporator for a snow melter

Abstract

The utility model relates to an evaporator of snow melting machine, including an evaporative cylinder, the evaporative cylinder has a front end face and outer cylinder shell, the evaporative cylinder rear end is equipped with a cylinder cover, the cylinder cover of evaporative cylinder is penetrated into the refrigerant inlet pipe and refrigerant outlet pipe, be equipped with an inner cylinder shell in the outer cylinder shell, the inner cylinder shell is sealed and forms an evaporative cavity with the outer cylinder shell, the evaporative cavity is divided into the head labyrinth, a plurality of middle section labyrinths, tail labyrinth from front to back by the partition ring, be equipped with the refrigerant inlet on the head labyrinth, be equipped with the refrigerant outlet on the tail labyrinth, the utility model has the advantages of: setting up the partition ring between the outer cylinder shell and the inner cylinder shell, forms the head labyrinth, a plurality of middle section labyrinths, tail labyrinth and then again in the labyrinth way back and forth, thereby make the process of evaporative cavity greatly increase, improved the refrigeration efficiency of the refrigerant of evaporator.

Description

Technical Field

[0001] This utility model relates to an improvement of the accessories of a snow melting machine, particularly an improvement of the evaporator. Background Technology

[0002] In the current field of refrigeration equipment, devices such as chilled water machines, ice cream machines, and snow melting machines mostly use a spiral-wound copper tube design for their evaporators. This type of evaporator places the spiral tube inside an inner or outer cylinder, with the refrigerant flowing within the tube. During heat transfer, the refrigerant first comes into contact with the inner or outer cylinder through the tube wall before the heat is transferred to the liquid being cooled. However, because the spiral tube and the inner and outer cylinders have a certain wall thickness, the heat transfer path becomes complex and less direct, resulting in a cooling effect that is difficult to achieve ideal.

[0003] From a contact perspective, the spiral tube itself has a certain gap, which means it cannot achieve full contact with the inner and outer cylinders. This insufficient contact greatly affects the efficiency of heat transfer, resulting in a significant reduction in cooling efficiency. Moreover, after the equipment has been used for a period of time, the spiral tube may separate from the inner and outer cylinders due to its own tension and other factors. Once separation occurs, the cooling effect will deteriorate, and in severe cases, it may even stop cooling altogether.

[0004] Spiral-wound copper tube evaporators have many drawbacks. The spiral tubes are wound tightly, which increases the material and process costs in the production process, resulting in high overall production costs. In addition, they have low cooling efficiency, poor reliability, and limited heat transfer capacity. Utility Model Content

[0005] In order to overcome the shortcomings of poor cooling effect of the evaporator in the current snow melting machine, this utility model provides an evaporator for a snow melting machine with good cooling effect.

[0006] The technical solution of this utility model to solve its technical problem is as follows: an evaporator for a snow melting machine includes an evaporating cylinder, the evaporating cylinder having a front end face and an outer cylinder shell, and a cylinder cover at the rear end of the evaporating cylinder, through which a refrigerant inlet pipe and a refrigerant outlet pipe are inserted; the front end face has a front opening, and the cylinder cover has a rear opening in the middle; a shaft protector tube for inserting a drive shaft is provided inside the evaporating cylinder, and the rear end of the shaft protector tube is fixed to the rear opening; an inner cylinder shell is provided inside the outer cylinder shell, and the inner cylinder shell and the outer cylinder shell are closed to form an evaporating chamber; the evaporating chamber is provided with several opening spacer rings, the opening angles of two adjacent spacer rings are opposite, and the evaporating chamber is divided from front to back by the spacer rings into a head labyrinth, several middle labyrinths, and a tail labyrinth; a refrigerant inlet is provided on the head labyrinth, and the refrigerant inlet is connected to the refrigerant inlet pipe; a refrigerant outlet is provided on the tail labyrinth, and the refrigerant outlet is connected to the refrigerant outlet pipe; The front opening is provided with a front flange cover with a sealing center hole; the front flange cover has a center hole edge extending rearward along the sealing center hole, and a mounting flange protrudes from the front side of the center hole edge toward the center hole; it also includes a main sealing ring, the outer side of which has a front lip and a center edge, and a mounting groove between the front lip and the center edge, the main sealing ring is installed in the sealing center hole, and the mounting flange is inserted into the mounting groove; the inner side of the front end face is also provided with a rear flange cover, the rear flange cover has a shaft hole in the middle, the front of the rear flange cover has an outer pressure edge and an inner pressure edge, and a front flange cover fixing groove is provided between the outer pressure edge and the inner pressure edge, the center hole edge of the front flange cover is snapped and fixed in the front flange cover fixing groove, so that the front flange cover and the rear flange cover clamp the front end face; the inner side of the inner pressure edge of the rear flange cover is also provided with a lip sealing ring, the front part of which abuts against the rear side of the main sealing ring, and the lip of the lip sealing ring abuts against the drive shaft to be inserted; An inner sealing gasket is also provided between the rear flange cover and the front face.

[0007] To enhance the cooling effect of the evaporator, at least three mid-section labyrinth channels are provided, which can extend the flow of the refrigerant in the labyrinth and increase the cooling effect.

[0008] In one preferred embodiment, five partition rings are provided, and four mid-section maze passages are provided.

[0009] To enhance temperature control feedback, a temperature control head mounting slot is provided on the front end surface, in which a temperature control head is installed.

[0010] In a preferred embodiment, the temperature control head is installed on a ray at a 10° angle from the vertical line of the drive shaft, which is the lowest and most stable temperature zone.

[0011] A preferred embodiment of the inner shell is that the inner shell is parallel to and coaxially arranged with the outer shell, the front end of the inner shell is connected to the outer shell through a front shell wall, and the rear end of the inner shell is connected to the outer shell through a rear shell wall; both the front shell wall and the rear shell wall are perpendicular to the inner shell.

[0012] Furthermore, both the refrigerant inlet and the refrigerant outlet are located on the inner shell.

[0013] To facilitate the fixing of the front and rear flange covers, a number of connecting posts are provided along the edge of the central hole of the front flange cover. A groove is provided at the position of the connecting post corresponding to the front opening. The connecting post passes through the groove. A connecting post mounting groove is provided at the position of the front flange cover fixing groove. The front flange cover also includes a connecting threaded part screwed onto the connecting post to connect and fix the front flange cover and the rear flange cover together.

[0014] To further enhance the sealing effect, a reinforcing edge is provided on the inner side of the main sealing ring. When the drive shaft is inserted, the reinforcing edge will abut against the drive shaft to increase the sealing effect.

[0015] To facilitate the positioning of the shaft guard tube, the rear flange cover is provided with an extension tube body along the shaft hole, and the shaft guard tube is located outside the extension tube body.

[0016] In use, the evaporator is connected in series on the drive shaft. The refrigerant enters from the refrigerant inlet pipe and then flows out from the refrigerant inlet of the first labyrinth channel. It flows through multiple labyrinth channels and finally vaporizes and returns to the compressor through the refrigerant outlet on the tail labyrinth channel and the refrigerant outlet pipe.

[0017] The beneficial effects of this utility model are as follows: 1. Multiple partition rings are set between the outer and inner shells, forming a first labyrinth channel, several middle labyrinth channels, and a tail labyrinth channel, and then the fluid flows back and forth within the labyrinth channels, thereby greatly increasing the flow rate of the evaporation chamber and improving the refrigeration efficiency of the refrigerant in the evaporator. 2. The front and rear flange covers are equipped with a main sealing ring and a lip sealing ring, and an inner sealing gasket is also provided at the contact point with the front end face. This triple sealing makes it difficult for slush in the slush cavity on the front side of the drive shaft to flow into the protective shaft tube and into the non-food cavity, ensuring safety and reliability. 3. The refrigerant inlet and outlet pipes are set inside the evaporator to enter the refrigerant inlet and outlet, respectively, with the refrigerant inlet located at the front end of the evaporator. This follows the natural law that slush syrup freezes from the back of the outer shell to the front, creating a pattern where the temperature at the rear end of the evaporator is higher than that at the front end, allowing for stepped freezing, improving energy utilization, and better absorbing heat. Attached Figure Description

[0018] Fig. 1 This is a general schematic diagram of a snow melting machine according to one embodiment of the present invention.

[0019] Fig. 2 This is a schematic diagram showing the separation of the evaporator and the drive shaft in one embodiment of this utility model.

[0020] Fig. 3 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0021] Fig. 4 This is a schematic diagram of the front end of one embodiment of the present invention.

[0022] Fig. 5 This is a schematic diagram of the evaporation chamber with the outer shell partially concealed in one embodiment of this utility model.

[0023] Fig. 6 This is a schematic diagram of another angle showing the evaporation chamber partially concealed from the outer shell of one embodiment of this utility model.

[0024] Fig. 7 This is a schematic diagram of a front opening sealing structure according to an embodiment of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1 Combined with appendix Figs. 1 to 7 An evaporator for a snow melting machine includes an evaporator cylinder 1, which has a front end face 2 and an outer shell 3. A cylinder cover 4 is provided at the rear end of the evaporator cylinder 1. A refrigerant inlet pipe 5 and a refrigerant outlet pipe 6 are inserted into the cylinder cover 4. The front end face 2 has a front opening 7, and the cylinder cover 4 has a rear opening in the middle. A shaft protector tube 8 for inserting a drive shaft is provided inside the evaporator cylinder 1, and the rear end of the shaft protector tube 8 is fixed to the rear opening. An inner shell 9 is provided inside the outer shell 3, and the inner shell 9 is connected to the outer shell. The three compartments are enclosed to form an evaporation chamber 10. The evaporation chamber 10 is provided with several partition rings 12 with openings 11. The openings 11 of two adjacent partition rings 12 are at opposite angles. The evaporation chamber 10 is divided into a head maze 13, several middle mazes 14, and a tail maze 15 from front to back by the partition rings 12. The head maze 13 is provided with a refrigerant inlet 16, which is connected to a refrigerant inlet pipe 5. The tail maze 15 is provided with a refrigerant outlet 17, which is connected to a refrigerant outlet pipe 6. A front flange cover 19 with a sealing center hole 18 is provided on the front opening 7; the front flange cover 19 has a center hole edge 20 extending rearward along the sealing center hole 18, and a mounting flange 21 protrudes from the front side of the center hole edge 20 towards the center hole; it also includes a main sealing ring 22, the outer side of which has a front lip 23 and a center edge 24, and a mounting groove 25 is provided between the front lip 23 and the center edge 24; the main sealing ring 22 is installed in the sealing center hole 18, and the mounting flange 21 is inserted into the mounting groove 25; a rear flange cover 26 is also provided on the inner side of the front end face 2, the rear flange cover 26... The rear flange cover 26 has a shaft hole 27 in the middle. The front of the rear flange cover 26 has an outer pressure edge 28 and an inner pressure edge 29. A front flange cover fixing groove 30 is provided between the outer pressure edge 28 and the inner pressure edge 29. The middle hole of the front flange cover 19 is snapped and fixed in the front flange cover fixing groove 30 along the edge 20, so that the front flange cover 19 and the rear flange cover 26 clamp the front end face 2. The inner side of the inner pressure edge 29 of the rear flange cover 26 is also provided with a lip sealing ring 31. The front part of the lip sealing ring 31 abuts against the rear side of the main sealing ring 22, and the lip of the lip sealing ring 31 abuts against the drive shaft 32 to be inserted. An inner sealing gasket 33 is also provided between the rear flange cover 26 and the front end face 2.

[0027] To enhance the cooling effect of the evaporator, the middle labyrinth channel 14 is provided with at least 3 channels, which can extend the flow of the refrigerant in the labyrinth and increase the cooling effect.

[0028] In one preferred embodiment, five partition rings 12 are provided, and four mid-section maze passages 14 are provided.

[0029] To enhance temperature control feedback, a temperature control head mounting slot is provided on the front end face 2, in which a temperature control head 34 is installed.

[0030] In a preferred embodiment, the temperature control head 34 is installed on a ray 10° apart from the perpendicular line of the drive shaft 32, which is the lowest and most stable temperature zone.

[0031] In a preferred embodiment, the inner shell 9 is parallel to and coaxially arranged with the outer shell 3. The front end of the inner shell 9 is connected to the outer shell 3 through a front shell wall 35, and the rear end of the inner shell 9 is connected to the outer shell 3 through a rear shell wall 36. Both the front shell wall 35 and the rear shell wall 36 are perpendicular to the inner shell 9.

[0032] Furthermore, both the refrigerant inlet 16 and the refrigerant outlet 17 are located on the inner shell 9.

[0033] To facilitate the fixing of the front and rear flange covers 26, a plurality of connecting posts 37 are provided on the edge 20 of the central hole of the front flange cover 19. The front opening 7 is provided with a groove 38 corresponding to the position of the connecting post 37. The connecting post 37 passes through the groove 38. The front flange cover fixing groove 30 is provided with a connecting post mounting groove 39 at the corresponding position. It also includes a connecting threaded part 40 screwed on the connecting post 37 to connect and fix the front flange cover 19 and the rear flange cover 26 together.

[0034] To further enhance the sealing effect, a reinforcing edge is provided on the inner side of the main sealing ring 22. When the drive shaft 32 is inserted, the reinforcing edge will abut against the drive shaft to increase the sealing effect.

[0035] To facilitate the positioning of the shaft guard tube 8, the rear flange cover 26 is provided with an extension tube body 41 along the shaft hole 27, and the shaft guard tube 8 is located outside the extension tube body 41.

[0036] In this embodiment, the evaporator is connected in series on the drive shaft 32. The refrigerant enters from the refrigerant inlet pipe 5 and then flows out from the refrigerant inlet 16 of the first labyrinth channel 13. It flows through multiple labyrinth channels and finally vaporizes and returns to the compressor through the refrigerant outlet 17 on the tail labyrinth channel 15 and the refrigerant outlet pipe 6.

[0037] The beneficial effects of this utility model are as follows: 1. Multiple partition rings are set between the outer and inner shells, forming a first labyrinth channel, several middle labyrinth channels, and a tail labyrinth channel, and then the fluid flows back and forth within the labyrinth channels, thereby greatly increasing the flow rate of the evaporation chamber and improving the refrigeration efficiency of the refrigerant in the evaporator. 2. The front and rear flange covers are equipped with a main sealing ring and a lip sealing ring, and an inner sealing gasket is also provided at the contact point with the front end face. This triple sealing makes it difficult for slush in the slush cavity on the front side of the drive shaft to flow into the protective shaft tube and into the non-food cavity, ensuring safety and reliability. 3. The refrigerant inlet and outlet pipes are set inside the evaporator to enter the refrigerant inlet and outlet, respectively, with the refrigerant inlet located at the front end of the evaporator. This follows the pattern that slush syrup freezes from the back of the outer shell to the front, creating a pattern where the temperature at the rear end of the evaporator is higher than that at the front end, allowing for stepped freezing, improving energy utilization, and better absorbing heat.

Claims

1. An evaporator for a snow melting machine, comprising an evaporating cylinder having a front end face and an outer shell, a cylinder cover being provided at the rear end of the evaporating cylinder, and a refrigerant inlet pipe and a refrigerant outlet pipe passing through the cylinder cover; the front end face having a front opening, and the cylinder cover having a rear opening in the middle; a shaft protector tube for inserting a drive shaft being provided inside the evaporating cylinder, the rear end of the shaft protector tube being fixed to the rear opening, characterized in that: An inner shell is provided inside the outer shell, and the inner shell and the outer shell are closed to form an evaporation chamber. The evaporation chamber is provided with several open partition rings, and the opening angles of two adjacent partition rings are opposite. The evaporation chamber is divided into a head labyrinth, several middle labyrinths, and a tail labyrinth by the partition rings from front to back. The head labyrinth is provided with a refrigerant inlet, which is connected to the refrigerant inlet pipe. The tail labyrinth is provided with a refrigerant outlet, which is connected to the refrigerant outlet pipe. The front opening is provided with a front flange cover with a sealing center hole; the front flange cover has a center hole edge extending rearward along the sealing center hole, and a mounting flange protrudes from the front side of the center hole edge toward the center hole; it also includes a main sealing ring, the outer side of which has a front lip and a center edge, and a mounting groove between the front lip and the center edge, the main sealing ring is installed in the sealing center hole, and the mounting flange is inserted into the mounting groove; the inner side of the front end face is also provided with a rear flange cover, the rear flange cover has a shaft hole in the middle, the front of the rear flange cover has an outer pressure edge and an inner pressure edge, and a front flange cover fixing groove is provided between the outer pressure edge and the inner pressure edge, the center hole edge of the front flange cover is snapped and fixed in the front flange cover fixing groove, so that the front flange cover and the rear flange cover clamp the front end face; the inner side of the inner pressure edge of the rear flange cover is also provided with a lip sealing ring, the front part of which abuts against the rear side of the main sealing ring, and the lip of the lip sealing ring abuts against the drive shaft to be inserted; An inner sealing gasket is also provided between the rear flange cover and the front face.

2. The evaporator of the snow melting machine according to claim 1, characterized in that: The middle section of the maze has at least three sections.

3. The evaporator of the snow melting machine according to claim 2, characterized in that: There are five partition rings and four maze passages in the middle section.

4. The evaporator of the snow melting machine according to claim 1, characterized in that: The front end surface is also provided with a temperature control head mounting slot, in which a temperature control head is installed.

5. The evaporator of the snow melting machine according to claim 4, characterized in that: The temperature control head is installed on a ray 10° apart from the vertical line of the drive shaft.

6. The evaporator of the snow melting machine according to claim 1, characterized in that: The inner shell is parallel to the outer shell and coaxially arranged. The front end of the inner shell is connected to the outer shell through the front shell wall, and the rear end of the inner shell is connected to the outer shell through the rear shell wall. Both the front shell wall and the rear shell wall are perpendicular to the inner shell.

7. The evaporator of the snow melting machine according to claim 1, characterized in that: Both the refrigerant inlet and refrigerant outlet are located on the inner shell.

8. The evaporator of the snow melting machine according to claim 1, characterized in that: The front flange cover has several connecting posts along the edge of the central hole. The front opening has a groove corresponding to the position of the connecting post. The connecting post passes through the groove. The front flange cover fixing groove has a connecting post mounting groove at the corresponding position. It also includes a connecting threaded part screwed onto the connecting post to connect and fix the front flange cover and the rear flange cover together.

9. The evaporator of the snow melting machine according to claim 1, characterized in that: The main sealing ring has a reinforcing edge protruding from its inner side.

10. The evaporator of the snow melting machine according to claim 1, characterized in that: The rear flange cover is provided with an extension tube body along the shaft hole.

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