Novel vertical shell and tube evaporator

Abstract

The novel vertical shell and tube evaporator comprises a shell and a plurality of first pipelines, the shell is cylindrical and vertically arranged, the first pipelines are vertically arranged in the shell, an upper end cover and a lower end cover are arranged at the upper end and the lower end of the shell respectively, a first inlet is formed in the upper end cover, a second inlet is formed in the lower end cover, and a second inlet is formed in the lower end cover. And a first outlet is formed in the lower end cover. According to the novel vertical shell and tube evaporator, due to the fact that the evaporator is vertically arranged, the occupied plane space is small, gas-liquid separation of refrigerants in the shell pass is more thorough, finally the refrigerants are separated through the secondary separator, the separation effect is better, and return liquid cannot be generated. According to the novel vertical shell and tube evaporator, a secondary refrigerant enters from the first inlet in the upper portion, flows from top to bottom and conducts countercurrent flow heat exchange motion with the refrigerant flowing from bottom to top, and the heat exchange effect is better. According to the novel vertical shell and tube evaporator, the floating ball liquid level is adopted for control, and liquid supply is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a novel vertical shell and tube evaporator. Background Art

[0002] Shell and tube evaporator is a heat exchange device in refrigeration system. Its working principle is that the refrigerant liquid boils at a lower temperature, turns into vapor, and absorbs the heat of the cooled object or medium. Shell and tube evaporator is widely used, including but not limited to refrigerators, commodity display cabinets, popsicle storage boxes and other refrigeration equipment. However, the existing shell and tube evaporators for ammonia are mostly horizontal, and the shell and tube evaporator occupies a large plane area. In addition, the gas-liquid diversion effect of the refrigerant in the shell is not good, which is easy to cause liquid return. Utility Model Content

[0003] Therefore, one purpose of the utility model is to propose a novel vertical shell and tube evaporator to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A novel vertical shell and tube evaporator comprises a shell and a plurality of first pipes, wherein the shell is cylindrical and arranged vertically, and the plurality of first pipes are arranged vertically inside the shell, and an upper end cover and a lower end cover are respectively arranged at the upper and lower ends of the shell, the upper end cover is provided with a first inlet, and the lower end cover is provided with a first outlet.

[0006] Furthermore, the shell and tube evaporator further comprises a secondary separator and a second pipeline, the secondary separator is connected with the shell through the second pipeline, and a second outlet is provided on the secondary separator.

[0007] Furthermore, the connection between the second pipe and the shell is located above the side surface of the shell.

[0008] Furthermore, the shell and tube evaporator also includes a float level gauge and a third pipeline, the float level gauge is connected to the shell through the third pipeline, the float level gauge is connected to a throttle valve, and the throttle valve is connected to a second inlet.

[0009] Furthermore, a connection point between the third pipe and the shell is located at a lower position on the side of the shell.

[0010] Furthermore, the shell and tube evaporator also includes a water level gauge, which is arranged on the side of the shell.

[0011] Furthermore, the upper end cover and the lower end cover are hemispherical, and the first inlet and the first outlet have the same caliber.

[0012] Furthermore, a plurality of the first pipes are evenly distributed in the shell.

[0013] Furthermore, the first pipe is used for circulating a coolant, and the coolant circulates from top to bottom in the first pipe. A shell side is formed between the shell and the first pipe, and the shell side is used for circulating a refrigerant, and the refrigerant circulates from bottom to top in the shell side.

[0014] Furthermore, the refrigerant is NH3.

[0015] Therefore, the utility model has the following beneficial effects:

[0016] The utility model discloses a novel vertical shell and tube evaporator, which occupies a small plane space due to its vertical arrangement, and the gas-liquid separation of the refrigerant in the shell is more thorough, and finally separated by a secondary separator, the separation effect is better, and no liquid return will be generated.

[0017] The utility model discloses a novel vertical shell and tube evaporator, in which a refrigerant coolant enters from a first inlet at the top, flows from top to bottom, and performs countercurrent heat exchange motion with the refrigerant flowing from bottom to top, so that the heat exchange effect is better.

[0018] The utility model discloses a novel vertical shell and tube evaporator which adopts a float liquid level control and has a more stable liquid supply.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of the vertical shell and tube evaporator of the utility model;

[0022] Figure 2 It is a schematic diagram of the working state of the vertical shell and tube evaporator of the utility model.

[0023] In the figure: 1. Shell; 2. First pipeline; 3. Upper end cover; 4. Lower end cover; 5. First inlet; 6. First outlet; 7. Secondary separator; 8. Second pipeline; 9. Second outlet; 10. Float level gauge; 11. Third pipeline; 12. Throttle valve; 13. Second inlet; 14. Water level gauge; 15. Inlet cavity; 16. Outlet cavity. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1 As shown, a novel vertical shell and tube evaporator comprises a shell 1 and a plurality of first pipes 2. The shell 1 is cylindrical and arranged vertically. The plurality of first pipes 2 are vertically arranged inside the shell 1. An upper end cover 3 and a lower end cover 4 are respectively arranged at the upper and lower ends of the shell 1. The upper end cover 3 is provided with a first inlet 5, and the lower end cover 4 is provided with a first outlet 6.

[0027] For easy identification, the dark color in the figure indicates the circulation location of the refrigerant.

[0028] Furthermore, the upper end cover 3 and the upper end surface of the shell 1 form an inlet cavity 15 , the lower end cover 4 and the lower end surface of the shell 1 form an outlet cavity 16 , and both ends of the first pipe 2 are connected to the inlet cavity 15 and the outlet cavity 16 respectively.

[0029] The utility model discloses a novel vertical shell and tube evaporator, which occupies a small plane space due to its vertical arrangement, and the gas-liquid separation of the refrigerant in the shell passage is more thorough.

[0030] The utility model provides a novel vertical shell and tube evaporator, in which the refrigerant coolant enters from the first inlet 5 at the top, flows from top to bottom, and performs countercurrent heat exchange motion with the refrigerant flowing from bottom to top, so that the heat exchange effect is better.

[0031] Furthermore, the shell and tube evaporator further comprises a secondary separator 7 and a second pipeline 8. The secondary separator 7 is connected to the shell 1 through the second pipeline 8. A second outlet 9 is provided on the secondary separator.

[0032] The secondary separator 7 is used for secondary separation of the refrigerant ammonia, so that the refrigerant gas-liquid separation is better and liquid return is not easy. The secondary separator 7 is an ammonia-liquid separator, which belongs to the existing mature technology and will not be described in detail here.

[0033] Furthermore, the connection point between the second pipe 8 and the shell 1 is located above the side surface of the shell 1 .

[0034] The second pipe 8 transfers the refrigerant in the shell side to the secondary separator 7. The refrigerant flows from bottom to top in the shell side and is gradually vaporized. Therefore, the connection between the second pipe 8 and the shell 1 is located at the upper side of the shell 1, which is conducive to the collection of gaseous ammonia.

[0035] Furthermore, the shell and tube evaporator also includes a float level gauge 10 and a third pipeline 11 . The float level gauge 10 is connected to the shell 1 through the third pipeline 11 . The float level gauge 10 is connected to a throttle valve 12 , and the throttle valve 12 is connected to a second inlet 13 .

[0036] The second inlet 13 is used as a refrigerant supply port, the throttle valve 12 is used for switch setting, and the float liquid level meter 10 is used to control the refrigerant supply amount.

[0037] Furthermore, the connection point between the third pipe 11 and the shell 1 is located at a lower position on the side of the shell 1 .

[0038] Since the refrigerant flows from bottom to top in the shell side, the connection between the third pipe 11 and the shell 1 is arranged at a lower position on the side of the shell 1 so that the refrigerant is located at the bottom after entering the shell 1.

[0039] Furthermore, the shell and tube evaporator further includes a water level gauge 14 , which is disposed on a side surface of the shell 1 .

[0040] Furthermore, the upper end cover 3 and the lower end cover 4 are hemispherical, and the first inlet 5 and the first outlet 6 have the same caliber.

[0041] Furthermore, a plurality of first pipes 2 are evenly distributed in the shell 1 .

[0042] As an implementation manner, the diameters of the first pipes 2 are the same.

[0043] As an implementation manner, the diameters of the first pipes 2 may also be different.

[0044] Furthermore, the first pipe 2 is used for circulating the coolant, and the coolant circulates from top to bottom in the first pipe 2. A shell side is formed between the shell 1 and the first pipe 2. The shell side is used for circulating the refrigerant, and the refrigerant circulates from bottom to top in the shell side.

[0045] Furthermore, the refrigerant is NH3.

[0046] like Figure 2As shown, when a novel vertical shell and tube evaporator of the utility model is working, the refrigerant coolant enters the inlet chamber 15 from the first inlet 5, and then enters the first pipe 2. The coolant flows from top to bottom in the pipe side. The refrigerant NH3 liquid enters the throttle valve 12 through the second inlet 13, and then enters the shell side of the evaporator, that is, the inside of the shell 1, through the float liquid level gauge 10 and the third pipe 11, and evaporates into gas NH3 in the shell side space and flows from bottom to top. Finally, it flows to the secondary separator 7 through the second pipe 8, and after separation, it flows out from the second outlet 9 and is sucked away by the refrigerator (not shown in the figure). The coolant coolant cooled by heat exchange flows out from the outlet chamber 16 and the first outlet 6 and enters the refrigeration cycle system (not shown in the figure) for refrigeration.

[0047] The utility model discloses a novel vertical shell and tube evaporator, which occupies a small plane space due to its vertical arrangement, and the gas-liquid separation of the refrigerant in the shell is more thorough, and finally separated by a secondary gas-liquid separator, so the separation effect is better and no liquid return will be generated.

[0048] The utility model discloses a novel vertical shell and tube evaporator, in which a refrigerant coolant enters from a first inlet at the top, flows from top to bottom, and performs countercurrent heat exchange motion with the refrigerant flowing from bottom to top, so that the heat exchange effect is better.

[0049] The utility model discloses a novel vertical shell and tube evaporator which adopts a float liquid level control and has a more stable liquid supply.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] It is not difficult for those skilled in the art to understand that the utility model includes any combination of the utility model content and the specific implementation method part of the above specification and the various parts shown in the drawings. Due to the limited space and to make the specification concise, the various schemes composed of these combinations are not described one by one. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0052] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel vertical shell and tube evaporator, characterized in that: It includes a shell and a plurality of first pipes, the shell is cylindrical and arranged vertically, the plurality of first pipes are vertically arranged inside the shell, the upper and lower ends of the shell are respectively provided with an upper end cover and a lower end cover, the upper end cover is provided with a first inlet, and the lower end cover is provided with a first outlet.

2. A novel vertical shell and tube evaporator according to claim 1, characterized in that: It also includes a secondary separator and a second pipeline. The secondary separator is connected to the shell through the second pipeline. The secondary separator is provided with a second outlet.

3. A novel vertical shell and tube evaporator according to claim 2, characterized in that: The connection point between the second pipe and the shell is located above the side surface of the shell.

4. A novel vertical shell and tube evaporator according to claim 1, characterized in that: It also includes a float level gauge and a third pipeline. The float level gauge is connected to the shell through the third pipeline. The float level gauge is connected to a throttle valve, and the throttle valve is connected to a second inlet.

5. A novel vertical shell and tube evaporator according to claim 4, characterized in that: The connection point between the third pipe and the shell is located at a lower position of the side surface of the shell.

6. A novel vertical shell and tube evaporator according to claim 1, characterized in that: It also includes a water level meter, which is arranged on the side of the shell.

7. A novel vertical shell and tube evaporator according to claim 1, characterized in that: The upper end cover and the lower end cover are hemispherical, and the first inlet and the first outlet have the same caliber.

8. A novel vertical shell and tube evaporator according to claim 1, characterized in that: A plurality of the first pipes are evenly distributed in the shell.

9. A novel vertical shell and tube evaporator according to any one of claims 1 to 8, characterized in that: The first pipe is used for circulating a coolant, and the coolant circulates from top to bottom in the first pipe. A shell side is formed between the shell and the first pipe, and the shell side is used for circulating a refrigerant, and the refrigerant circulates from bottom to top in the shell side.

10. A novel vertical shell and tube evaporator according to claim 9, characterized in that: The refrigerant is NH3.

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