Evaporator and snow melter

Abstract

The utility model discloses a kind of evaporator and snow melting machine with it, it is related to refrigeration equipment technical field, the evaporator includes: first cylinder and second cylinder, the second cylinder is located the outside of the first cylinder, at least one of the outer wall surface of the first cylinder and the inner wall surface of the second cylinder is equipped with flow guide groove, and the outer wall surface of the first cylinder and the inner wall surface of the second cylinder are laminated cooperation, for closing the flow guide groove to construct heat exchange flow channel, at least a part of the heat exchange flow channel spirally extends along the axis of the evaporator, and the inlet and outlet of the heat exchange flow channel are located the same end of the evaporator along axial direction. According to the evaporator of the utility model embodiment, heat exchange flow channel can be directly set on evaporator, heat exchange medium can be directly contacted with second cylinder located outside evaporator to carry out heat exchange, beneficial to reduce energy loss, beneficial to simplify the structure of evaporator.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to an evaporator and a snow melting machine having the evaporator. Background Technology

[0002] In related technologies, the evaporator includes a barrel and a coil installed inside the barrel. The heat exchange medium flows inside the coil, and the coil inside the barrel exchanges heat with the outside of the barrel. This results in a relatively complex structure for the evaporator. Furthermore, the heat exchange medium is separated from the outside by the outer wall of the coil, the barrel wall, and the gap between the coil and the barrel, leading to low heat exchange efficiency. Utility Model Content

[0003] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, one objective of this invention is to provide an evaporator that can improve heat exchange efficiency and simplify the evaporator's structure.

[0004] Another objective of this invention is to provide a snow melting machine, including the aforementioned evaporator.

[0005] An evaporator according to an embodiment of the present invention includes: a first cylinder and a second cylinder, the second cylinder being disposed outside the first cylinder, at least one of the outer wall surface of the first cylinder and the inner wall surface of the second cylinder being provided with a guide groove, and the outer wall surface of the first cylinder and the inner wall surface of the second cylinder being stacked and fitted together to close the guide groove to form a heat exchange channel, at least a portion of the heat exchange channel extending spirally along the axis of the evaporator, and the inlet and outlet of the heat exchange channel being disposed at the same end of the evaporator along the axial direction.

[0006] According to the embodiment of the present invention, the heat exchange channel can be directly set on the evaporator, and the heat exchange medium can directly contact the second cylinder located on the outside of the evaporator for heat exchange, which helps to reduce energy loss and simplifies the structure of the evaporator.

[0007] In addition, the evaporator according to the above embodiments of the present invention may also have the following additional technical features:

[0008] In some examples of this utility model, the heat exchange channel includes a first channel and a second channel, a first end of the first channel is connected to the inlet, a second end of the first channel is connected to the first end of the second channel, and a second end of the second channel is connected to the outlet.

[0009] In some examples of this invention, the first flow channel and the second flow channel extend spirally along the axis of the evaporator.

[0010] In some examples of this utility model, the first flow channel includes a plurality of first spiral segments distributed along the axial direction and connected in a spiral shape, and the second flow channel includes a plurality of second spiral segments distributed along the axial direction and connected in a spiral shape, wherein the plurality of first spiral segments and the plurality of second spiral segments are staggered.

[0011] In some examples of this utility model, at the connection between the first flow channel and the second flow channel, the first spiral segment and the second spiral segment are connected to form a U-shaped flow channel.

[0012] In some examples of this invention, the connection between the first flow channel and the second flow channel is located at the other end of the evaporator axially away from the inlet and the outlet.

[0013] In some examples of this invention, the inlet and the outlet are radially opposite each other in the evaporator.

[0014] In some examples of this invention, the cross-sectional area of ​​the inlet is larger than the cross-sectional area of ​​the outlet.

[0015] In some examples of this utility model, the first cylinder includes a fitting portion, which is disposed at opposite ends of the first cylinder along the axial direction, and the fitting portion fits the second cylinder.

[0016] In some examples of this utility model, the first cylinder and the second cylinder are formed by compression molding.

[0017] In some examples of this utility model, the guide groove is provided on the first cylinder, and the outer side of the second cylinder is a cylindrical surface.

[0018] In some examples of this utility model, the first cylinder includes a plurality of connecting portions and a plurality of groove portions, the plurality of groove portions and the plurality of connecting portions are staggered along the axial direction, and the connecting portions connect adjacent groove portions, at least a portion of the connecting portions fits into the second cylinder, and the groove portions are recessed toward the inner side of the first cylinder relative to the connecting portions.

[0019] In some examples of this utility model, the evaporator further includes a first connecting pipe and a second connecting pipe, the first connecting pipe being connected to the inlet and the second connecting pipe being connected to the outlet, the first connecting pipe and the second connecting pipe being disposed inside the first cylinder, and the diameter of the first connecting pipe being larger than the diameter of the second connecting pipe.

[0020] In some examples of this invention, the evaporator further includes a heat insulation medium filled inside the second cylinder.

[0021] The snow melting machine according to an embodiment of the present invention includes the aforementioned evaporator. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the evaporator in some embodiments of this utility model;

[0023] Figure 2 This is a partial cross-sectional view of the evaporator in some embodiments of this utility model;

[0024] Figure 3 This is an assembly diagram of the evaporator in some embodiments of this utility model;

[0025] Figure 4 This is a bottom view of the evaporator in some embodiments of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the first cylinder in some embodiments of this utility model;

[0027] Figure 6 This is a partial structural schematic diagram of the snow melting machine in some embodiments of the present invention (showing the evaporator and stirring blades).

[0028] Figure label:

[0029] 100. Evaporator; 10. First cylinder; 101. Guide channel; 11. Channel section; 12. Connecting part; 102. Heat exchange channel; 110. First channel; 111. First spiral section; 120. Second channel; 121. Second spiral section; 103. Inlet; 104. Outlet; 13. Fitting part; 20. Second cylinder; 21. Top wall; 22. Peripheral wall; 23. Flanged edge; 203. Notch; 31. First connecting pipe; 32. Second connecting pipe; 210. Rotating shaft; 220. Stirring blade. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] Combination Figures 1 to 5According to an embodiment of the present invention, the evaporator 100 includes a first cylindrical body 10 and a second cylindrical body 20. The second cylindrical body 20 is disposed outside the first cylindrical body 10. At least one of the outer wall surface of the first cylindrical body 10 and the inner wall surface of the second cylindrical body 20 is provided with a flow guide groove 101. The outer wall surface of the first cylindrical body 10 and the inner wall surface of the second cylindrical body 20 are stacked and fitted together to close the flow guide groove 101 to form a heat exchange channel 102. Thus, after the first cylindrical body 10 and the second cylindrical body 20 are connected, the heat exchange channel 102 can be directly constructed. The heat exchange channel 102 can directly contact the second cylindrical body 20 located on the outside, thereby improving the heat exchange effect. Moreover, there is no need to set up a separate heat exchanger, which helps to simplify the structure of the evaporator 100.

[0032] Specifically, the outer wall of the first cylinder 10 may be provided with a flow guide groove 101, and the second cylinder 20 may form a heat exchange channel 102 at the flow guide groove 101 after it is fitted with the first cylinder 10; alternatively, the inner wall of the second cylinder 20 may be provided with a flow guide groove 101, and the second cylinder 20 may form a heat exchange channel 102 at the flow guide groove 101 after it is fitted with the first cylinder 10; or alternatively, both the outer wall of the first cylinder 10 and the inner wall of the second cylinder 20 may be provided with a flow guide groove 101, and the second cylinder 20 may form a heat exchange channel 102 at the flow guide groove 101 after it is fitted with the first cylinder 10.

[0033] Furthermore, at least a portion of the heat exchange channel 102 extends spirally along the axis of the evaporator 100, facilitating adaptation to the cylinder structure and thereby improving the tightness of the fit between the heat exchange channel 102 and the cylinder, and increasing the area of ​​the heat exchange channel 102. Specifically, the inlet 103 and outlet 104 of the heat exchange channel 102 are located at the same end of the evaporator 100 along the axial direction. In this way, after the heat exchange medium enters the heat exchange channel 102 from the inlet 103, it can flow from one end of the evaporator 100 to the other end along the spiral extension of the heat exchange channel 102, and then flow back to the end where the inlet 103 is located, and exit from the outlet 104. This increases the flow time of the heat exchange medium in the heat exchange channel 102, prolongs the flow path of the heat exchange medium, and improves the heat exchange effect.

[0034] Specifically, in related technologies, the evaporator includes a barrel and a coil disposed within the barrel. A heat exchange medium flows through the coil, and the coil inside the barrel exchanges heat with the outside of the barrel. This results in a relatively complex evaporator structure, and the heat exchange medium is separated from the outside by the outer wall of the coil, the barrel wall, and the gap between the coil and the barrel, leading to low heat exchange efficiency. Therefore, this application simplifies the structure and improves the heat exchange effect by integrating the heat exchange channel 102 onto the outer shell of the evaporator 100.

[0035] According to the embodiment of the present invention, the heat exchange channel 102 can be directly installed on the evaporator 100, and the heat exchange medium can directly contact the second cylinder 20 located on the outside of the evaporator 100 for heat exchange, which helps to reduce energy loss. There is no need to install a heat exchange device with the heat exchange channel 102 separately, which simplifies the structure of the evaporator 100.

[0036] Optionally, the first cylinder 10 and the second cylinder 20 can be made of stainless steel, which helps to improve structural strength and thermal conductivity. Specifically, by constructing the outer shell of the evaporator 100 into a double-layer structure and setting a heat exchange channel 102 between the double layers, both the structural strength and heat exchange efficiency of the evaporator 100 can be improved. In practical applications, heat exchange can be achieved simply by the liquid requiring heat exchange contacting the outer wall of the evaporator 100, i.e., the outer wall of the second cylinder 20, which helps to improve heat exchange efficiency.

[0037] Combination Figure 3 In some embodiments of this utility model, the heat exchange channel 102 includes a first channel 110 and a second channel 120. The first end of the first channel 110 is connected to the inlet 103, and the second end of the first channel 110 is connected to the first end of the second channel 120. The second end of the second channel 120 is connected to the outlet 104. Specifically, the heat exchange medium can enter the first channel 110 from the inlet 103, flow through the first channel 110, then enter the second channel 120, and finally flow out from the outlet 104 after flowing through the second channel 120. The first channel 110 and the second channel 120 extend spirally along the axis of the evaporator 100. Thus, when the heat exchange medium flows through the first channel 110, it can extend along the axial direction of the evaporator 100 and flow around the evaporator 100. After entering the second channel 120, the heat exchange medium can also extend along the axial direction of the evaporator 100 and flow around the evaporator 100, thereby improving the heat exchange effect of the evaporator 100.

[0038] For example, the heat exchange medium entering the first flow channel 110 from the inlet 103 can flow along the first flow channel 110 from the first end of the evaporator 100 along the axial direction to the second end of the evaporator 100 away from the first end. After entering the second flow channel 120, the heat exchange medium flows towards the outlet 104. Therefore, the heat exchange medium can flow along the second flow channel 120 from the second end of the evaporator 100 along the axial direction to the first end of the evaporator 100 away from the second end. Thus, the heat exchange medium can flow around the evaporator 100 twice along the axial direction of the evaporator 100, thereby improving the heat exchange effect. Alternatively, the heat exchange medium enters the first flow channel 110 and the second flow channel 120, which are connected between the first end and the second end of the evaporator 100 along the axial direction. The first flow channel 110 flows from the first end of the evaporator 100 around the evaporator 100 toward the middle of the evaporator 100, and the second flow channel 120 flows from the middle of the evaporator 100 around the evaporator 100 toward the second end of the evaporator 100. Finally, the second flow channel 120 extends from the second end of the evaporator 100 toward the first end so that the heat exchange medium flows out from the outlet 104.

[0039] Furthermore, combined Figure 5 In some embodiments of this utility model, the first flow channel 110 includes a plurality of first spiral segments 111 distributed axially and connected in a spiral shape, and the second flow channel 120 includes a plurality of second spiral segments 121 distributed axially and connected in a spiral shape. The plurality of first spiral segments 111 and the plurality of second spiral segments 121 are staggered. The plurality of first spiral segments 111 can guide the heat exchange medium to flow around the evaporator 100, and the plurality of second spiral segments 121 can guide the heat exchange medium to flow around the evaporator 100. In this way, the second spiral segments 121 can be constructed by utilizing the interval between adjacent first spiral segments 111 of the first flow channel 110, forming a first flow channel 110 spirally extending from the first end to the second end and a second flow channel 120 spirally extending from the second end to the first end in the axial direction, which is beneficial for optimizing the spatial arrangement of the flow channels and improving the heat exchange effect.

[0040] Furthermore, compared to the flow channel that spirals from one end of the evaporator 100 to the other, where adjacent spiral segments need to be separated by baffles, the staggered distribution of multiple first spiral segments 111 and multiple second spiral segments 121 allows the staggered arrangement of the second spiral segments 121 and the first spiral segments 111 to separate the multiple spiral segments while constructing the first spiral segments 111 and the second spiral segments 121. This eliminates the need for separate separation structures, simplifies manufacturing, and facilitates optimized spatial arrangement.

[0041] Combination Figure 5In some embodiments of this utility model, at the connection between the first flow channel 110 and the second flow channel 120, the first spiral segment 111 and the second spiral segment 121 are connected to form a U-shaped flow channel. In this way, while connecting the first flow channel 110 and the second flow channel 120, a U-shaped meandering flow channel can be formed between the first flow channel 110 and the second flow channel 120, which is beneficial for increasing the flow area, improving space utilization, and enhancing heat exchange efficiency.

[0042] Combination Figure 3 and Figure 4 In some embodiments of this utility model, the connection point between the first flow channel 110 and the second flow channel 120 is located at the other end of the evaporator 100 along the axial direction away from the inlet 103 and the outlet 104. Thus, the first flow channel 110 can circumferentially surround the evaporator 100 from the inlet 103 and extend along the axial direction of the evaporator 100 to the other end of the evaporator 100. The second flow channel 120 can connect to the first flow channel 110 at this end, and circumferentially surround the evaporator 100 and extend along the axial direction of the evaporator 100 to the other end of the evaporator 100, i.e., the end where the outlet 104 and the inlet 103 are located. Therefore, the heat exchange medium can circulate twice along the axial direction around the evaporator 100, which is beneficial for improving the heat exchange effect.

[0043] Combination Figure 5 In some embodiments of this utility model, the inlet 103 and the outlet 104 are radially opposite each other in the evaporator 100, which helps to increase the flow path of the first flow channel 110 and the second flow channel 120. In addition, the radially opposite inlet 103 and outlet 104 in the evaporator 100 can provide space for the connecting pipes at the inlet 103 and outlet 104, which is beneficial for spatial arrangement.

[0044] In some embodiments of this invention, the cross-sectional area of ​​the inlet 103 is larger than that of the outlet 104. Specifically, when the heat exchange medium enters the heat exchange channel 102, it is a low-temperature, low-pressure liquid (or a gas-liquid mixture) with a relatively high density and small volume. The larger cross-sectional area of ​​the inlet 103 avoids excessive pressure drop caused by high resistance in two-phase flow, thus facilitating an increase in the amount of heat exchange medium entering the channel. After absorbing heat within the heat exchange channel 102, the heat exchange medium completely evaporates into a low-temperature, low-pressure gas, resulting in a decrease in density and a significant increase in volume. Therefore, the smaller cross-sectional area of ​​the outlet 104 and its smaller diameter increase the gas flow rate, ensuring complete evaporation of the liquid refrigerant and preventing liquid slugging into the compressor.

[0045] In some embodiments of this utility model, the inlet 103 may be provided with a first connector and the outlet 104 may be provided with a second connector. The first connector and the second connector can facilitate the connection of the pipe body at the inlet 103 and the outlet 104, which is beneficial to improving the sealing effect.

[0046] In some embodiments of this utility model, the first cylinder 10 is integrally formed and / or the second cylinder 20 is integrally formed, which facilitates manufacturing and assembly.

[0047] In some embodiments of this invention, the first cylinder 10 is integrally formed and / or the second cylinder 20 is made of stainless steel, which can improve heat conduction, corrosion resistance, and durability of the refrigeration container. Furthermore, stainless steel is easy to clean.

[0048] Referring to the figures, in some embodiments of this utility model, the first cylindrical body 10 includes a fitting portion 13, which is disposed at opposite ends of the first cylindrical body 10 along the axial direction. The fitting portion 13 fits against the second cylindrical body 20, which can improve the tightness of the connection between the first cylindrical body 10 and the second cylindrical body 20 and the structural stability after the connection. Specifically, since the inner wall surface of the first cylindrical body 10 is provided with a guide groove 101, the contact area after the first cylindrical body 10 and the second cylindrical body 20 are engaged may be small. By providing the fitting portion 13 in the first cylindrical body 10, the fitting portion 13 can be stacked and engaged with the second cylindrical body 20, which is beneficial to improving the connection effect.

[0049] In some embodiments of this utility model, the first cylinder 10 and the second cylinder 20 are formed by compression molding, which facilitates manufacturing and simplifies the assembly structure of the evaporator 100. Optionally, the first cylinder 10 and the second cylinder 20 can be formed by stamping, or by hydraulic bulging or spinning, or by welding the first cylinder 10 and the second cylinder 20 together. For example, the first cylinder 10 and the second cylinder 20 can be sleeved together and sealed at both ends, for example, at the fitting part 13. High-pressure liquid is injected into the cavity between the first cylinder 10 and the second cylinder 20, and the cylinders plastically deform under pressure to fit the mold cavity.

[0050] In some embodiments of this utility model, the guide groove 101 is provided on the first cylinder 10, and the outer surface of the second cylinder 20 is cylindrical. Specifically, when the evaporator 100 is applied to a snow melting machine, the fluid inside the snow melting machine flows outside the evaporator 100 and directly contacts the outer surface of the second cylinder 20. The cylindrical surface of the outer surface of the second cylinder 20 minimizes the resistance when the fluid flows along the outer surface of the second cylinder 20, avoiding eddies and dead zones caused by right angles or sharp corners. The circular cross-section has the shortest circumference for the same cross-sectional area, resulting in lower frictional resistance between the fluid and the outer surface of the second cylinder 20. In addition, when the snow melting machine makes slush, the internal fluid freezes on the surface of the evaporator 100. The snow melting machine is equipped with a stirring blade 220 for cooperating with the evaporator 100. When the stirring blade 220 rotates, it can stir the liquid on the one hand, and on the other hand, the stirring blade 220 can fit against the outer surface of the second cylinder 20 to scrape off the ice layer on the surface of the evaporator 100, thereby producing slush. The cylindrical second shell 20 also makes the evaporator 100 easy to clean and maintain.

[0051] Combination Figure 5 In some embodiments of this utility model, the first cylinder 10 includes a plurality of connecting portions 12 and a plurality of grooves 11. The plurality of grooves 11 and the plurality of connecting portions 12 are staggered along the axial direction, and the connecting portions 12 connect adjacent grooves 11. At least a portion of the connecting portion 12 is in contact with the second cylinder 20, and the grooves 11 are recessed toward the inside of the first cylinder 10 relative to the connecting portions 12. In this way, after the first cylinder 10 and the second cylinder 20 are engaged, a heat exchange channel 102 is formed between the first cylinder 10 and the second cylinder 20 at the grooves 11, and the first cylinder 10 and the second cylinder 20 are connected at the connecting portions 12, thereby sealing the area around the grooves 11, that is, the connecting portions 12 and the second cylinder 20 are sealed together, which helps to simplify the structure, improve the heat exchange effect, and improve the structural stability.

[0052] Furthermore, combined Figure 2 The groove 11 and the connecting part 12 form a wave-shaped cylinder extending along the axial direction of the evaporator 100, and a heat exchange channel 102 is formed between the groove 11 and the second cylinder 20.

[0053] Furthermore, the connecting part 12 is sealed to the second cylinder 20, which can construct the heat exchange channel 102 as a closed channel and realize the pipeline function of the channel. For example, the second cylinder 20 and the connecting part 12 can be bonded together, or the connecting part 12 can be fitted to the inner wall of the second cylinder 20, with no gap or interference fit between the two.

[0054] Specifically, in combination Figure 3 In some embodiments of this utility model, the second cylinder 20 includes a top wall 21 and a peripheral wall 22. The top wall 21 and the peripheral wall 22 are connected, and the top wall 21 and the peripheral wall 22 form a receiving cavity with one end open, so that other components can be accommodated inside the refrigeration tank 100. The end of the first cylinder 10 abuts against the top wall 21, which can realize the axial connection between the first cylinder 10 and the second cylinder 20. The connecting part 12 of the first cylinder 10 fits against the peripheral wall 22, which can realize the circumferential connection between the first cylinder 10 and the second cylinder 20, which is beneficial to improving the structural stability after connection.

[0055] In some embodiments of this utility model, combined with Figure 3 The peripheral wall 22 of the second cylinder 20 includes a first part, a second part, and a third part along the axial direction. The second part is located between the first part and the third part. The heat exchange channel 110 is disposed in the second part, and the first part and the third part are attached to the fitting part 13. That is to say, without the first part and the third part where the heat exchange channel 101 is not provided, the first cylinder 10 and the second cylinder 20 can be tightly connected, which can improve the stability of the connection between the first cylinder 10 and the second cylinder 20.

[0056] Combination Figure 1 and Figure 4 In some embodiments of this utility model, the peripheral wall 22 of the second cylinder 20 is provided with a flange 23 at the end opposite to the top wall 21 in the axial direction, and the flange 23 is provided with multiple notches 203. Specifically, the flange 23 can contact the snow melting machine when the evaporator 100 is installed on the snow melting machine, thereby improving the stability of the installation. The notches 203 on the flange 23 can be used to install the evaporator 100 on the snow melting machine, thereby realizing the installation of the evaporator 100. The structure is simple and easy to construct.

[0057] Furthermore, the outward extension of the flange 23 increases the assembly space, thereby facilitating assembly and maintenance.

[0058] Combination Figure 3 In some embodiments of this utility model, the evaporator 100 further includes a first connecting pipe 31 and a second connecting pipe 32. The first connecting pipe 31 connects to the inlet 103, and the second connecting pipe 32 connects to the outlet 104. The first connecting pipe 31 and the second connecting pipe 32 are located inside the first cylinder 10, and the diameter of the first connecting pipe 31 is larger than the diameter of the second connecting pipe 32. Specifically, the first connecting pipe 31 transports a liquid heat exchange medium with high density, but the flow rate needs to be limited, so a larger pipe diameter is required to reduce pressure drop and flow noise. The second connecting pipe 32 transports a gaseous heat exchange medium with low density, allowing for a higher flow rate, so a smaller pipe diameter can be used. The flow resistance of the two-phase flow (liquid side) is much higher than that of the single-phase gas (gas side), and a larger pipe diameter can reduce pressure drop and avoid system efficiency loss. The smaller pipe diameter on the gas side can maintain a higher flow rate, prevent lubricating oil retention, and ensure complete evaporation of the refrigerant.

[0059] In some embodiments of this utility model, the evaporator 100 further includes a heat insulation medium, which is filled inside the second cylinder 20. Specifically, a receiving cavity can be constructed inside the cylinder of the evaporator 100 or inside the first cylinder 10. The heat insulation medium is disposed inside the evaporator 100, and the heat exchange channel 102 is disposed between the first cylinder 10 and the second cylinder 20, which can be closer to the outside of the evaporator 100, making it easier for the heat exchange channel 102 to exchange heat with substances outside the evaporator 100. Inside the first cylinder 10, the heat insulation medium can reduce the energy loss of the heat exchange channel 102, prevent cold energy from being transferred into the receiving cavity, and further improve the heat exchange effect of the heat exchange channel 102.

[0060] Optionally, combined Figure 1 and Figure 3The first cylinder 10 and the second cylinder 20 are constructed in a barrel shape with one end open. If the opening is at the bottom of the evaporator 100, the inlet 103 and the outlet 104 can be located at the top of the evaporator 100. In this case, the first connecting pipe 31 and the second connecting pipe 32 can extend towards the bottom of the evaporator 100. At this time, the heat exchange medium inside the evaporator 100 can also provide insulation for the first connecting pipe 31 and the second connecting pipe 32 to reduce energy loss. The inlet 103 and the outlet 104 can also be located at the bottom of the evaporator 100, that is, near the open end of the evaporator 100, which facilitates connection.

[0061] Combination Figures 1 to 5 According to an embodiment of the present invention, the evaporator 100 includes: a first cylinder 10, a second cylinder 20, a first connecting pipe 31 and a second connecting pipe 32. The first connecting pipe 31 is connected to the inlet 103 to deliver the heat exchange medium to the heat exchange channel 102, and the second connecting pipe 32 is connected to the outlet 104 to discharge the heat exchange medium after heat exchange, thereby realizing heat exchange.

[0062] According to the embodiment of the present invention, the heat exchange channel 102 can be directly disposed on the evaporator 100, and the heat exchange medium can directly contact the second cylinder 20 disposed on the outside of the evaporator 100 for heat exchange, which can improve the heat exchange efficiency of the evaporator 100, simplify the structure of the evaporator 100, and facilitate the assembly of the evaporator 100.

[0063] Combination Figure 6 According to an embodiment of the present invention, the snow melting machine includes the aforementioned evaporator 100. Specifically, the snow melting machine further includes a throttling element and a compressor. The throttling element is connected to a first connecting pipe 31, and the compressor is connected to a second connecting pipe 32. Specifically, the first connecting pipe 31 can be connected to the throttling element so that low-temperature, low-pressure liquid refrigerant enters the heat exchange channel 102 therefrom, and the second connecting pipe 32 can be connected to the compressor so that the gaseous heat exchange medium is discharged to the compressor for circulation.

[0064] According to the snow melting machine of this utility model embodiment, by setting the aforementioned evaporator 100 on the refrigeration equipment, the heat exchange efficiency of the refrigeration equipment can be improved, and the structure of the refrigeration equipment can be simplified, and the assembly of the refrigeration equipment can be simplified.

[0065] Combination Figure 6 A rotating shaft 210 can be installed on the evaporator 100, and a stirring blade 220 can be connected to the rotating shaft 210. When the refrigeration device is used to cool the liquid, the stirring blade 220 rotates around the evaporator 100, which can improve the uniformity of heat exchange and improve the heat exchange effect. When the refrigeration device needs to make shaved ice, the stirring blade 220 can rotate close to the outer periphery of the evaporator 100, thereby scraping off the ice layer adhering to the surface of the evaporator 100 after heat exchange, so that the refrigeration device can make shaved ice.

[0066] More specifically, the evaporator 100 has a tube extending through the receiving cavity, which is hollow inside and can form an installation channel for mounting the rotating shaft 210. The rotating shaft 210 can pass through the installation channel, so that its opposite ends can extend out of the evaporator 100. One end of the rotating shaft 210 can be used to connect to the stirring blade 220, and the other end can be used to connect to the power device that drives the rotating shaft 210 to rotate. After the rotating shaft 210 is installed in the tube, the stirring blade 220, which is driven by the rotating shaft 210, can be arranged around the cylindrical surface of the outer peripheral wall of the evaporator 100 or the outer side of the second cylinder, which is beneficial to improve the stirring effect or the ice-scraping effect.

[0067] In the description of this utility model, it should be understood that the terms "length", "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An evaporator (100), characterized in that, include: A first cylinder (10) and a second cylinder (20), the second cylinder (20) being disposed outside the first cylinder (10), at least one of the outer wall surface of the first cylinder (10) and the inner wall surface of the second cylinder (20) being provided with a guide groove (101), and the outer wall surface of the first cylinder (10) and the inner wall surface of the second cylinder (20) being stacked and fitted together to close the guide groove (101) to form a heat exchange channel (102), at least a portion of the heat exchange channel (102) being spirally extended along the axis of the evaporator (100), and the inlet (103) and outlet (104) of the heat exchange channel (102) being disposed at the same end of the evaporator (100) along the axial direction.

2. The evaporator (100) according to claim 1, characterized in that, The heat exchange channel (102) includes a first channel (110) and a second channel (120). The first end of the first channel (110) is connected to the inlet (103), the second end of the first channel (110) is connected to the first end of the second channel (120), and the second end of the second channel (120) is connected to the outlet (104). The first channel (110) and the second channel (120) extend spirally along the axis of the evaporator (100).

3. The evaporator (100) according to claim 2, characterized in that, The first flow channel (110) includes a plurality of first spiral segments (111) distributed along the axial direction and connected in a spiral shape, and the second flow channel (120) includes a plurality of second spiral segments (121) distributed along the axial direction and connected in a spiral shape, wherein the plurality of first spiral segments (111) and the plurality of second spiral segments (121) are staggered.

4. The evaporator (100) according to claim 3, characterized in that, At the connection between the first flow channel (110) and the second flow channel (120), the first spiral section (111) and the second spiral section (121) are connected to form a U-shaped flow channel; and / or The connection between the first flow channel (110) and the second flow channel (120) is located at the other end of the evaporator (100) axially away from the inlet (103) and the outlet (104).

5. The evaporator (100) according to claim 1, characterized in that, The inlet (103) and the outlet (104) are radially opposite each other in the evaporator (100); and / or The cross-sectional area of ​​the inlet (103) is larger than the cross-sectional area of ​​the outlet (104); and / or The first cylindrical body (10) includes a fitting portion (13), which is disposed at opposite ends of the first cylindrical body (10) along the axial direction, and the fitting portion (13) fits against the second cylindrical body (20); and / or The first cylindrical body (10) and the second cylindrical body (20) are formed by compression molding.

6. The evaporator (100) according to any one of claims 1-5, characterized in that, The guide groove (101) is provided on the first cylinder (10), and the outer surface of the second cylinder (20) is a cylindrical surface.

7. The evaporator (100) according to claim 6, characterized in that, The first cylindrical body (10) includes a plurality of connecting portions (12) and a plurality of groove portions (11), the plurality of groove portions (11) and the plurality of connecting portions (12) are staggered along the axial direction, and the connecting portions (12) connect adjacent groove portions (11), at least a portion of the connecting portion (12) is in contact with the second cylindrical body (20), and the groove portion (11) is recessed toward the inside of the first cylindrical body (10) relative to the connecting portion (12).

8. The evaporator (100) according to claim 7, characterized in that, The evaporator (100) further includes a first connecting pipe (31) and a second connecting pipe (32). The first connecting pipe (31) is connected to the inlet (103), and the second connecting pipe (32) is connected to the outlet (104). The first connecting pipe (31) and the second connecting pipe (32) are located inside the first cylinder (10). The diameter of the first connecting pipe (31) is larger than the diameter of the second connecting pipe (32).

9. The evaporator (100) according to any one of claims 1 or 8, characterized in that, The evaporator (100) also includes a heat insulation medium, which is filled inside the second cylinder (20).

10. A snow melting machine, characterized in that, Includes the evaporator (100) according to any one of claims 1-9.

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