An evaporator for a continuous ice maker

Abstract

The utility model relates to the field of cotton ice machine, concretely is a kind of evaporator for cotton ice machine. It includes outer tube and the inner tube of being located in outer tube, and the pipeline of being equipped with including air inlet pipe and air outlet pipe is worn to inner tube, and refrigerant flows out from air outlet pipe after entering inner cavity of inner tube from air inlet pipe, and air inlet pipe, air outlet pipe and inner tube joint are welded sealing. Outer tube is apart from inner tube, and there is airtight cavity between the two, filled with heat-conducting material, outer tube both ends are provided with bearing, and air outlet pipe, air inlet pipe and outer tube are provided with sealing ring between them. After adopting the technical scheme, the utility model welds sealing to inner tube, and prevents leakage problem due to aging of heat exchange material in rotating matching part. Fill heat-conducting silica gel in the cavity between outer tube and inner tube, so that food materials are cooled when outer tube rotates. Because of using heat-conducting silicone grease, the sealing element between outer tube and inner tube can seal heat-conducting silicone grease without high sealing condition. The structure has good refrigeration effect, low cost and low failure rate.

Description

Technical Field

[0001] This utility model relates to the field of shaved ice machines, specifically to an evaporator for shaved ice machines. Background Technology

[0002] Shaved ice machines make shaved ice by using a rotating cylindrical evaporator. As the cylinder rotates, fresh milk or flavoring liquid adheres to the low-temperature outer surface and freezes into ice, which is then cut into shaved ice by a spatula. This method allows for immediate consumption and preserves the original texture of the milk. The core component of the shaved ice machine is the rotating cylindrical evaporator, whose rotating cylinder connects to the central axis of the evaporator, allowing the inner cavity to be exposed to the outside atmosphere.

[0003] In the long-term start-up and shutdown operation of shaved ice machines, solving the refrigerant leakage problem at the rotating joint is a key technical challenge. Research has found that when the shaved ice machine is stopped and the evaporator is stationary, the highest pressure inside the cavity is 1.2 MPa, approximately 12 times the external atmospheric pressure, and the highest surface temperature of the cylinder is about 35°C. The evaporator is essentially a normal-temperature pressure vessel, making refrigerant leakage easy. When the shaved ice machine is running and the evaporator rotates at 60-100 rpm, the lowest pressure inside the cavity is 0.02-0.04 MPa, close to 0 MPa, indicating a negative pressure state. The lowest surface temperature of the cylinder is -44°C, making the evaporator essentially a low-temperature vacuum container, allowing external air to easily enter the cavity. Solving the rotary sealing problem of the evaporator under alternating operating conditions is a recognized technical challenge in the industry. Utility Model Content

[0004] The purpose of this invention is to provide an evaporator for a shaved ice machine with good sealing performance.

[0005] The above objectives are achieved in this way.

[0006] An evaporator for a shaved ice machine includes an outer cylinder and an inner cylinder disposed inside the outer cylinder, wherein the inner cylinder is provided with pipes.

[0007] The pipeline includes an inlet pipe and an outlet pipe. The refrigerant enters the inner cavity of the inner cylinder through the inlet pipe and then flows out through the outlet pipe. The joints between the inlet pipe, the outlet pipe and the inner cylinder are welded and sealed.

[0008] The outer cylinder is separate from the inner cylinder, and a sealed cavity is provided between the outer cylinder and the inner cylinder. The cavity is filled with a heat-conducting material. Bearings are provided at both ends of the outer cylinder, and a sealing ring is provided between the air outlet pipe, the air inlet pipe and the outer cylinder.

[0009] The objective of this utility model can also be optimized by the following technical measures.

[0010] Preferably, the walls of the air inlet pipe and the air outlet pipe are provided with vent holes for ventilation.

[0011] Furthermore, the vent holes are all located in the part of the air outlet pipe and air inlet pipe inside the inner cylinder.

[0012] Preferably, the thermally conductive material is cryogenic thermal grease.

[0013] Preferably, the outer cylinder is provided with a first protective sleeve and a second protective sleeve at both ends, the air outlet pipe is disposed inside the first protective sleeve, and the air inlet pipe is disposed inside the second protective sleeve.

[0014] Furthermore, a sealing ring is provided between the air outlet pipe and the first protective sleeve, and a sealing ring is provided between the air inlet pipe and the second protective sleeve.

[0015] Furthermore, the exhaust pipe has a portion extending out of the first protective sleeve, and the intake pipe has a portion extending out of the second protective sleeve; the exposed portions of the exhaust pipe and the intake pipe are fitted with retaining springs.

[0016] By adopting the above technical solution, this utility model effectively eliminates the problem of aging and leakage of heat exchange materials due to long-term use at the rotating joints by welding and sealing the inner cylinder where heat exchange occurs. Thermally conductive silicone grease is filled into the cavity between the outer and inner cylinders, allowing the outer cylinder to cool the food at a low temperature while rotating. Because thermally conductive silicone grease is used in the cavity, the seal between the outer and inner cylinders does not require excessively high sealing conditions to effectively seal the grease within the cavity. This structure not only has a significant cooling effect but also low manufacturing cost and a low failure rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention.

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure 3 for Figure 2 Enlarged view of part A.

[0020] Figure 4 for Figure 2 Enlarged view of part B.

[0021] Figure 5 Exploded view of the parts of this utility model.

[0022] In the diagram: outer cylinder 1, first protective sleeve 11, second protective sleeve 12, transmission position 111, inner cylinder 2, cavity 3, air inlet pipe 41, air outlet pipe 42, vent hole 43, bearing 5, fixing snap ring 6, sealing ring 7, joint 8. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Combination Figure 1 An evaporator for a shaved ice machine includes an outer cylinder 1 and an inner cylinder 2 disposed inside the outer cylinder 1. The inner cylinder 2 is perforated with pipes, including an inlet pipe 41 and an outlet pipe 42. In this embodiment, the inlet pipe 41 and the outlet pipe 42 are two independent pipes, welded together and then inserted into the inner cylinder 2. In some embodiments, the inlet pipe 41 and the vent pipe use the same pipe, with a separator between them to divide the pipe into an inlet section and an outlet section. Multiple vent holes 43 are provided on the walls of the inlet pipe 41 and the outlet pipe 42. Refrigerant enters the inner cylinder 2 through the vent holes 43 of the inlet pipe 41 and then flows out through the vent holes 43 of the outlet pipe 42. The diameter, number, and location of the vent holes 43 can be changed according to production needs. The ventilation holes 43 are all located in the part of the air outlet pipe 42 and the air inlet pipe 41 inside the inner cylinder 2.

[0025] Combination Figure 3 and Figure 4 The joint 8 between the air inlet pipe 41, the air outlet pipe 42 and the inner cylinder 2 is welded and sealed.

[0026] Combination Figure 2 The outer cylinder 1 is separate from the inner cylinder 2, and a sealed cavity 3 is provided between the outer cylinder 1 and the inner cylinder 2. The cavity 3 is filled with a thermally conductive material. In this embodiment, the thermally conductive material is cryogenic thermal grease, which completely fills the cavity 3 to maximize the heat transfer efficiency between the inner cylinder 2 and the outer cylinder 1. Protective sleeves are provided at both ends of the outer cylinder 1, including a first protective sleeve 11 and a second protective sleeve 12. In this embodiment, the first protective sleeve 11, the second protective sleeve 12, and the outer cylinder 1 are integrally formed. In some embodiments, the first protective sleeve 11, the second protective sleeve 12, and the outer cylinder 1 are detachably formed.

[0027] Combination Figure 2 and Figure 3 The air outlet pipe 42 is disposed inside the first protective sleeve 11, and the air inlet pipe 41 is disposed inside the second protective sleeve 12. The first protective sleeve 11 and the second protective sleeve 12 are provided with bearings 5. The first protective sleeve 11 is provided with a transmission position 111 connected to the motor.

[0028] The exhaust pipe 42 and the intake pipe 41 are exposed outside the first protective sleeve 11 and the second protective sleeve 12, respectively. The exposed parts of the exhaust pipe 42 and the intake pipe 41 are fitted with fixing springs 6. The fixing springs 6 fix the welded part composed of the exhaust pipe 42, the intake pipe 41 and the inner cylinder 2 to both sides of the outer cylinder 1.

[0029] A sealing ring 7 for sealing the cavity 3 is provided between the air outlet pipe 42 and the first protective sleeve 11, and a sealing ring 7 for sealing the cavity 3 is provided between the air inlet pipe 41 and the second protective sleeve 12.

[0030] The process is as follows: the refrigerant enters the inner cavity of the inner cylinder 2 through the air inlet of the air inlet pipe 41, causing its temperature to drop rapidly. The low temperature is transferred to the surface of the outer cylinder 1 through the cryogenic thermal grease. The refrigerant in the inner cavity of the inner cylinder 2 is discharged through the air outlet of the air outlet pipe 42, and heat exchange is carried out in a cycle.

[0031] The air inlet pipe 41 and air outlet pipe 42 are welded and sealed to the inner layer seam of the inner cylinder 2. The outer cylinder 1 is sealed to the cavity 3 by the sealing ring 7. The welded parts are fixed to both sides of the outer cylinder 1 by the fixing spring 6. In the field of shaved ice machines, the shaved ice machine is equipped with a corresponding base for installing the rolling evaporator. (How to install the rolling evaporator in the shaved ice machine is existing technology in the industry, and the specific technical details will not be described.) After the base of this utility model is installed in the shaved ice machine, the bearing 5 is rotatably installed on the base. The evaporator is driven to rotate by the motor at the transmission position 111. Since the air outlet pipe 42, air inlet pipe 41 and inner cylinder 2 form a welded part, they do not participate in the rotation. The motor drives the outer cylinder 1 to rotate through the transmission position 111.

[0032] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An evaporator for a shaved ice machine, characterized in that: It includes an outer cylinder and an inner cylinder disposed inside the outer cylinder, wherein the inner cylinder is provided with pipes; The pipeline includes an inlet pipe and an outlet pipe. The refrigerant enters the inner cavity of the inner cylinder through the inlet pipe and then flows out through the outlet pipe. The joints between the inlet pipe, the outlet pipe and the inner cylinder are welded and sealed. The outer cylinder is separate from the inner cylinder, and a sealed cavity is provided between the outer cylinder and the inner cylinder. The cavity is filled with a heat-conducting material. Bearings are provided at both ends of the outer cylinder. A sealing ring is provided between the air outlet pipe and the outer cylinder, and a sealing ring is provided between the air inlet pipe and the outer cylinder.

2. The evaporator for a shaved ice machine according to claim 1, characterized in that: The walls of the air inlet and outlet pipes are provided with vent holes for ventilation.

3. The evaporator for a shaved ice machine according to claim 2, characterized in that: The ventilation holes are all located in the part of the air outlet pipe and the air inlet pipe inside the inner cylinder.

4. The evaporator for a shaved ice machine according to claim 1, characterized in that: The thermally conductive material is cryogenic thermal grease.

5. The evaporator for a shaved ice machine according to claim 1, characterized in that: The outer cylinder is provided with a first protective sleeve and a second protective sleeve at both ends, the air outlet pipe is located inside the first protective sleeve, and the air inlet pipe is located inside the second protective sleeve.

6. The evaporator for a shaved ice machine according to claim 5, characterized in that: A sealing ring is provided between the air outlet pipe and the first protective sleeve, and a sealing ring is provided between the air inlet pipe and the second protective sleeve.

7. The evaporator for a shaved ice machine according to claim 6, characterized in that: The exhaust pipe has a portion extending out of the first protective sleeve, and the intake pipe has a portion extending out of the second protective sleeve. The exposed portions of the exhaust pipe and the intake pipe are fitted with retaining springs.

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