Shell and tube evaporator for snow melting machine

Abstract

The utility model relates to a shell tube type evaporator for a snow melting machine, which comprises an outer cylinder and an inner cylinder, the inner cylinder is welded and fixed on the inner wall of the outer cylinder, the inner diameter of the outer cylinder is matched with the outer diameter of the inner cylinder, the shell tube type evaporator is characterized in that a spiral groove is arranged on the outer wall of the inner cylinder, and the outer wall of the inner cylinder is provided with a spiral groove. The spiral groove in the outer wall of the inner cylinder is matched with the inner wall of the outer cylinder to form a cooling liquid spiral flow channel, a spiral groove channel used for winding a first welding wire is further formed in the outer wall of the inner cylinder, and a gap between the spiral groove channel in the outer wall of the inner cylinder and the inner wall of the outer cylinder is filled with the first welding wire after the first welding wire is welded and melted. The spiral channel for winding the first welding wire is further formed in the outer wall of the inner barrel, and the gap between the spiral channel in the outer wall of the inner barrel and the inner wall of the outer barrel is filled with the first welding wire after the first welding wire is welded and melted, so that gas blow-by between two adjacent flow channels can be effectively prevented by adopting the structure; and the effect of ensuring uniform refrigeration on the surface of the evaporator is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporator equipment technical field, concretely relates to a shell and tube evaporator for snow melting machine. BACKGROUND

[0002] The existing snow melting machine has two types of evaporators, one is copper pipe type, and the phase change refrigeration process of refrigerant is completed in the copper pipe, and the cold quantity is transferred to the evaporator cylinder, and there is a multilayer thermal resistance in the cold quantity transfer process, heat loss exists, heat exchange is affected, and meanwhile, the cross section of the copper pipe is oval after forming, and the oval shape cannot be perfectly combined with the inner surface of the evaporator cylinder, the heat exchange area is lost, and the heat exchange is affected, and the other type is full liquid type, which is also an inner and outer cylinder structure, but without spiral pipeline, the advantage is that the heat exchange area is not lost, and the heat exchange capacity is large, and the disadvantage is that there is a problem of oil return difference, and the oil cannot return to the compressor, causing the oil to accumulate in the evaporator, affecting heat exchange, and meanwhile, the oil of the back pressure machine becomes less, which can cause the wear of the moving parts of the compressor to be more serious, reducing the service life.

[0003] The existing patent 202121653907.X discloses a shell and tube evaporator for snow melting machine, which comprises an outer cylinder, an inner cylinder is arranged in the outer cylinder, a spiral flow channel is arranged between the outer wall of the inner cylinder and the inner wall of the outer cylinder, a refrigerant inlet is arranged at one end of the spiral flow channel, and a refrigerant outlet is arranged at the other end; the utility model has high heat exchange efficiency, and is beneficial to oil return of the compressor, and can avoid wear of the moving parts of the compressor.

[0004] In summary, in order to solve the above problems, a shell and tube evaporator for snow melting machine is designed. SUMMARY

[0005] The utility model discloses a shell and tube evaporator for snow melting machine, which is designed to solve the above problems, and the spiral groove on the outer wall of the inner cylinder cooperates with the inner wall of the outer cylinder to form a cooling liquid spiral flow channel, which can directly cool, and is not affected by the thickness of the inner wall of the inner cylinder, thereby improving the refrigeration efficiency.

[0006] To solve the above technical problems, the utility model provides a kind of shell tube evaporator for snow melting machine, including outer tube and inner tube, the inner tube is welded and fixed on the inner wall of the outer tube, the inner diameter of the outer tube is matched with the outer diameter of the inner tube, it is characterized by: spiral groove is opened on the outer wall of the inner tube, and the spiral groove on the outer wall of the inner tube is matched with the inner wall of the outer tube to form cooling liquid spiral flow channel, spiral groove is also opened on the outer wall of the inner tube for winding first welding wire, and the gap between the spiral groove on the outer wall of the inner tube and the inner wall of the outer tube is filled after welding and melting of first welding wire.

[0007] Further: the outer wall of the left and right ends of the inner tube is also provided with welding groove for winding second welding wire, and the gap between the welding groove on the outer wall of the inner tube and the inner wall of the outer tube is filled after welding and melting of second welding wire.

[0008] Further: the size of the first welding wire is 0.5 times that of the second welding wire.

[0009] Further: the inner wall of the left end of the inner tube is provided with refrigerant inlet communicated with spiral groove, the refrigerant inlet is communicated with evaporator inlet pipe, the inner wall of the right end of the inner tube is provided with refrigerant outlet communicated with spiral groove, the refrigerant outlet is communicated with evaporator outlet pipe, and the end of the evaporator inlet pipe away from the refrigerant inlet and the end of the evaporator outlet pipe away from the refrigerant outlet respectively extend to the outside of the outer tube from the open end of the outer tube.

[0010] After adopting the above structure, the utility model has the beneficial effects as follows:

[0011] 1、 the utility model discloses that the spiral groove on the outer wall of the inner tube is matched with the inner wall of the outer tube to form cooling liquid spiral flow channel, which can directly refrigerate, and is not affected by the thickness of the inner wall of the inner tube, thereby improving the refrigeration efficiency.

[0012] 2、 the utility model discloses that the spiral groove on the outer wall of the inner tube is also provided with spiral groove for winding first welding wire, and the gap between the spiral groove on the outer wall of the inner tube and the inner wall of the outer tube is filled after welding and melting of first welding wire, which can effectively prevent gas leakage between adjacent two flow channels, thereby ensuring uniform refrigeration on the surface of the evaporator. ACCURACY

[0013] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0014] Figure 1 It is the appearance structure diagram of the utility model.

[0015] Figure 2 It is the local structure diagram of outer tube and inner tube connection.

[0016] Figure 3 For Figure 2 Enlarged view of A.

[0017] Figure 4 For the outer shape of the inner tube.

[0018] Figure 5 For Figure 4 Enlarged view of B.

[0019] In the figure: 1 is the outer tube, 2 is the inner tube, 2-1 is the spiral groove, 2-2 is the spiral channel, 2-3 is the welding channel, 3 is the evaporator inlet pipe, 4 is the evaporator outlet pipe, 5 is the cooling liquid spiral flow channel, 6 is the second welding wire, 7 is the first welding wire. DETAILED DESCRIPTION

[0020] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 indicated, a shell and tube evaporator for snow melting machine, comprising an outer tube 1 and an inner tube 2, the inner tube is welded and fixed on the inner wall of the outer tube, the inner diameter of the outer tube matches the outer diameter of the inner tube, the outer wall of the inner tube is provided with a spiral groove 2-1, the spiral groove on the outer wall of the inner tube cooperates with the inner wall of the outer tube to form a cooling liquid spiral flow channel 5, and the outer wall of the inner tube is also provided with a spiral channel 2-2 for winding the first welding wire 7, and the gap between the spiral channel on the outer wall of the inner tube and the inner wall of the outer tube is filled after the first welding wire is welded and melted. The cooling liquid spiral flow channel is formed by the spiral groove on the outer wall of the inner tube and the inner wall of the outer tube, which can directly cool and is not affected by the thickness of the inner wall of the inner tube, thereby improving the cooling efficiency. Moreover, the outer wall of the inner tube is also provided with a spiral channel for winding the first welding wire, and the gap between the spiral channel on the outer wall of the inner tube and the inner wall of the outer tube is filled after the first welding wire is welded and melted, which can effectively prevent gas leakage between adjacent two flow channels and ensure uniform cooling of the surface of the evaporator.

[0021] As Figure 2 , Figure 3 and Figure 4 indicated, the outer wall of the left and right ends of the inner tube is also provided with a welding channel 2-3 for winding the second welding wire 6, and the gap between the welding channel on the outer wall of the inner tube and the inner wall of the outer tube is filled after the second welding wire is welded and melted; the size of the first welding wire is 0.5 times that of the second welding wire. The present application improves the firmness of the connection between the inner tube and the outer tube, and the second welding wire is also melted when the first welding wire is welded and melted, thereby further fixing the inner tube and the outer tube.

[0022] AsFigure 1 and Figure 2 The inner wall of the left end of the inner cylinder is provided with a refrigerant inlet communicated with the spiral groove, the refrigerant inlet is communicated with the evaporator inlet pipe 3, the inner wall of the right end of the inner cylinder is provided with a refrigerant outlet communicated with the spiral groove, the refrigerant outlet is communicated with the evaporator outlet pipe 4, and the end of the evaporator inlet pipe away from the refrigerant inlet and the end of the evaporator outlet pipe away from the refrigerant outlet respectively extend to the outside of the outer cylinder from the open end of the outer cylinder.

[0023] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and refinements without departing from the principles of the present application shall be considered as falling within the protection scope of the present application.

Claims

1. A shell and tube evaporator for a snow melter, comprising an outer tube (1) and an inner tube (2), wherein the inner tube is welded and fixed to the inner wall of the outer tube, and the inner diameter of the outer tube matches the outer diameter of the inner tube, characterized in that: The outer wall of the inner cylinder is provided with a spiral groove (2-1), and the spiral groove on the outer wall of the inner cylinder cooperates with the inner wall of the outer cylinder to form a spiral flow channel (5) for cooling liquid. The outer wall of the inner cylinder is also provided with a spiral groove (2-2) for winding a first welding wire (7), and the gap between the spiral groove on the outer wall of the inner cylinder and the inner wall of the outer cylinder is filled after being welded and melted by the first welding wire.

2. The shell and tube evaporator for a snow melter according to claim 1, characterized in that: Welding grooves (2-3) for winding a second welding wire (6) are also provided on the outer walls of the left and right ends of the inner cylinder, and the gap between the welding grooves on the outer wall of the inner cylinder and the inner wall of the outer cylinder is filled after being welded and melted by the second welding wire.

3. The shell and tube evaporator for a snow melter according to claim 2, characterized in that: The size of the first welding wire is 0.5 times that of the second welding wire.

4. The shell and tube evaporator for a snow melter according to claim 1, characterized in that: A refrigerant inlet connected to the spiral groove is provided on the inner wall of the left end of the inner cylinder, and the refrigerant inlet is connected to the evaporator inlet pipe (3). A refrigerant outlet connected to the spiral groove is provided on the inner wall of the right end of the inner cylinder, and the refrigerant outlet is connected to the evaporator outlet pipe (4). The end of the evaporator inlet pipe away from the refrigerant inlet and the end of the evaporator outlet pipe away from the refrigerant outlet respectively extend from the open end of the outer cylinder to the outside thereof.

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