Air duct structure and grain cooling unit

Abstract

The utility model provides a kind of air duct structure and grain cooling unit, including two ventilation pipes respectively installed in evaporator both ends and respectively connected in fan and air outlet pipe, ventilation pipe is conical to form big end and small end, the big end of two ventilation pipes is respectively connected in the both ends of evaporator, and small end is respectively connected in fan and air outlet pipe.When fan starts, airflow can be guided to evaporator along the taper surface from small end to big end, and then guided to air outlet pipe through the taper surface from big end to small end, the whole airflow streamline is smooth, avoids airflow separation and strong turbulent disturbance at right angle, significantly improves airflow flow field distribution, reduces airflow flow separation phenomenon in fan and evaporator, evaporator and air outlet pipe connecting area, effectively suppresses the generation of vortex, thereby reduces local flow resistance, eliminates airflow high-frequency whistling sound, and makes airflow and evaporator contact more uniform, which is beneficial to improve the heat exchange efficiency between air and evaporator.

Description

Technical Field

[0001] This utility model relates to the technical field of grain cooling units, and in particular to an air duct structure and a grain cooling unit. Background Technology

[0002] Mobile grain cooling units, as a flexible and efficient type of equipment, are specifically designed for the characteristics of my country's grain storage environment and climate. They do not require fixed installation in multiple grain depots and can be flexibly moved to different warehouses as needed to provide emergency cooling for heated grain piles. They are an important technical equipment for achieving the goals of green grain storage and scientific grain preservation, effectively avoiding the high cost of multi-point investment in fixed equipment.

[0003] However, the duct structure of existing mobile grain cooling units generally adopts a traditional square cross-section design, such as... Figure 6 As shown, when airflow passes through a square duct, especially at right-angle corners or inlet areas, irregular air vortices are easily formed at each corner (area A). The periodic generation and shedding of vortices will generate strong airflow pulsations, producing an uncomfortable high-frequency whistling sound, which constitutes noise pollution. At the same time, the formation of vortices consumes the kinetic energy of the airflow, increases local flow resistance, and leads to effective airflow loss, thereby reducing the overall heat exchange efficiency of the unit. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an air duct structure and a grain cooling unit, which solves the problems of noise pollution and effective airflow loss caused by the square cross-section design of the air duct structure in existing grain cooling units.

[0005] On the one hand, according to the embodiments of this utility model, the present utility model adopts the following technical solution:

[0006] A duct structure includes two ventilation pipes respectively installed at both ends of an evaporator and respectively connected to a fan and an air outlet pipe. The ventilation pipes are tapered to form a large end and a small end. The large ends of the two ventilation pipes are respectively connected to both ends of the evaporator, and the small ends are respectively connected to the fan and the air outlet pipe.

[0007] Preferably, the large end and the small end are respectively provided with an outer folded edge and an inner folded edge.

[0008] Preferably, both the outer and inner folded edges are provided with a plurality of first mounting holes arranged circumferentially thereon.

[0009] Preferably, the end of the air outlet duct is provided with a connecting pipe, which is connected to the small end of one of the ventilation ducts.

[0010] Preferably, both ends of the adapter pipe are provided with mounting edges, and the two mounting edges are respectively connected to the inner folded edge of one of the smaller ends and the air outlet pipe.

[0011] Preferably, the mounting edge has several second mounting holes.

[0012] Preferably, sealing gaskets are provided between the outer folded edges of the two large ends and the evaporator, between the inner folded edge of one small end and the air outlet of the fan, and between the inner folded edge of the other small end and one of the mounting edges.

[0013] On the other hand, according to the embodiments of this utility model, the present utility model also adopts the following technical solutions:

[0014] A grain cooling unit includes a base and an air duct structure.

[0015] Preferably, the base is provided with a fixed bracket, and the air outlet duct is located on the fixed bracket.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] With the conical structure of the ventilation ducts, the large ends of the two ventilation ducts are connected to the two ends of the evaporator. When the fan starts, the airflow can be guided to the evaporator along the conical surface from the small end to the large end, and then guided to the outlet duct through the conical surface from the large end to the small end. The entire airflow is smooth, avoiding airflow separation and strong turbulence at right angles. This significantly improves the airflow field distribution, reduces airflow separation in the connection area between the fan and the evaporator, and between the evaporator and the outlet duct, effectively suppresses the generation of vortices, thereby reducing local flow resistance and eliminating high-frequency whistling noise. At the same time, the contact between the airflow and the evaporator is more uniform, which is conducive to improving the heat exchange efficiency between the air and the evaporator, and thus enhancing the cooling performance of the grain cooling unit. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the grain cooling unit in an embodiment of this utility model.

[0019] Figure 2 This is an exploded structural diagram of the air duct structure in an embodiment of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the ventilation pipe in an embodiment of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the transfer pipe in an embodiment of this utility model.

[0022] Figure 5 This is a flow direction diagram of the airflow in an embodiment of this utility model.

[0023] Figure 6 This is a flow direction diagram of airflow in the prior art.

[0024] In the above attached figures:

[0025] 1. Fan;

[0026] 2. Evaporator;

[0027] 3. Air outlet duct;

[0028] 4. Ventilation duct; 401. Outer fold; 402. Sealing gasket; 403. Large end; 404. Small end; 405. First mounting hole; 406. Inner fold;

[0029] 5. Adapter pipe; 501. Mounting edge; 502. Second mounting hole;

[0030] 6. Fixed bracket;

[0031] 7. Base. Detailed Implementation

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0033] In existing technologies, such as Figure 6 As shown, when the airflow enters the left square duct through fan 1, some of the airflow will move up and down and collide with the side wall of the right square duct, easily causing airflow at the corner ( Figure 6 An air vortex is formed in the central area (Area A), causing airflow separation and kinetic energy loss, resulting in a whistling sound. Therefore, this utility model embodiment proposes a duct structure, including two ventilation pipes 4 respectively installed at both ends of the evaporator 2 and respectively connected to the fan 1 and the air outlet pipe 3. The ventilation pipes 4 are tapered to form a large end 403 and a small end 404. The large ends 403 of the two ventilation pipes 4 are respectively connected to both ends of the evaporator 2, and the small ends 404 are respectively connected to the fan 1 and the air outlet pipe 3.

[0034] In the embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 5 As shown, the ventilation duct 4 is designed as a conical structure, with a large end 403 and a small end 404 at each end. During installation, the large ends 403 of the two ventilation ducts 4 are installed at both ends of the evaporator 2, corresponding to the air inlets of the evaporator 2. The small ends 404 of the two ventilation ducts 4 are connected to the air outlet of the fan 1 and the air outlet duct 3, respectively. Figure 6For example, when the fan 1 starts, the airflow can be guided to the evaporator 2 along the conical surface from the small end 404 to the large end 403 of the left ventilation pipe 4, and then guided to the outlet pipe 3 through the conical surface from the large end 403 to the small end 404 of the right ventilation pipe 4. The entire airflow is smooth and unobstructed, avoiding airflow separation and strong turbulence at right angles, significantly improving the airflow field distribution, reducing the flow separation phenomenon in the connection area between the fan 1 and the evaporator 2, and between the evaporator 2 and the outlet pipe 3, effectively suppressing the generation of vortices, thereby reducing local flow resistance and eliminating the high-frequency whistling sound of the airflow. At the same time, the contact between the airflow and the evaporator 2 is more uniform, which is conducive to improving the heat exchange efficiency between the air and the evaporator 2, thereby enhancing the cooling performance of the grain cooling unit.

[0035] Specifically, in the connection between the ventilation duct 4 and the fan 1, evaporator 2, and outlet duct 3, welding, bolting, or snap-fit ​​connections can be used, such as... Figure 3 As shown, the large end 403 and the small end 404 are respectively provided with an outer folded edge 401 and an inner folded edge 406. The outer folded edge 401 and the inner folded edge 406 increase the connection area of ​​the large end 403 and the small end 404 of the ventilation pipe 4, which facilitates fixed connection by welding and other methods, and at the same time enhances the structural rigidity of the end and prevents deformation.

[0036] Secondly, while ensuring convenient installation and subsequent disassembly, and also ensuring connection strength, bolt connection is preferred. Both the outer folded edge 401 and the inner folded edge 406 are provided with a number of first mounting holes 405 arranged along their circumference. The air outlet of the fan 1, both ends of the evaporator 2, and the air outlet pipe 3 are provided with holes corresponding to the number of first mounting holes 405. The bolts are passed through the corresponding first mounting holes 405 and holes to achieve quick-release connection.

[0037] Specifically, such as Figure 2 and Figure 4 As shown, the end of the air outlet pipe 3 is provided with a transition pipe 5, which is connected to the small end 404 of one of the ventilation pipes 4. The air outlet pipe 3 is annular, and the ventilation pipe 4 is a rectangular diffused conical structure. The left side of the transition pipe 5 is a rectangular structure, which is used to connect to the small end 404 of the right ventilation pipe 4. The right side of the transition pipe 5 is circular, which is used to connect to the air outlet pipe 3, which facilitates the assembly of the whole machine.

[0038] Similarly, both ends of the transition pipe 5 are provided with mounting edges 501. The two mounting edges 501 are respectively connected to the inner folded edge 406 of one of the small ends 404 and the air outlet pipe 3. The fixed connection method of the transition pipe 5 can also be welding, bolt connection or snap-on connection. The mounting edge 501 can increase the connection area at both ends of the transition pipe 5 and enhance the structural rigidity of the connection end face.

[0039] For ease of assembly, bolt fixing is preferred. The mounting edge 501 has several second mounting holes 502. The bolts are passed through the second mounting holes 502 and the inner folded edge 406 of the right ventilation pipe 4 to achieve the fixed assembly of the transfer pipe 5 and the right ventilation pipe 4. The air outlet pipe 3 also has holes corresponding to the second mounting holes 502. The bolts are passed through the second mounting holes 502 and the holes to achieve the fixed assembly of the transfer pipe 5 and the air outlet pipe 3.

[0040] Specifically, such as Figure 2 As shown, sealing gaskets 402 are provided between the outer folded edges 401 of the two large ends 403 and the evaporator 2, between the inner folded edge 406 of one small end 404 and the air outlet of the fan 1, and between the inner folded edge 406 of the other small end 404 and one of the mounting edges 501. The sealing gaskets 402 effectively prevent air leakage at each interface, ensure the overall airtightness of the air duct system, avoid effective airflow loss due to air leakage, and further ensure cooling efficiency and energy consumption control.

[0041] like Figure 1 As shown, this utility model embodiment also proposes a grain cooling unit, including a base 7. The grain cooling unit also includes the above-mentioned air duct structure. The specific structure of the air duct structure is as described in the above embodiment. Since this grain cooling unit adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0042] Specifically, such as Figure 1 As shown, a fixed bracket 6 is provided on the base 7, and the air outlet pipe 3 is provided on the fixed bracket 6, which can fix and support the air outlet pipe 3 to prevent the air outlet pipe 3 from moving axially.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A duct structure comprising two ventilation pipes (4) respectively installed at both ends of an evaporator (2) and respectively connected to a fan (1) and an air outlet pipe (3), characterized in that, The ventilation pipe (4) is tapered to form a large end (403) and a small end (404). The large ends (403) of the two ventilation pipes (4) are respectively connected to the two ends of the evaporator (2), and the small ends (404) are respectively connected to the fan (1) and the air outlet pipe (3).

2. The air duct structure according to claim 1, wherein The large end (403) and the small end (404) are respectively provided with an outer folded edge (401) and an inner folded edge (406).

3. A duct structure according to claim 2, wherein Both the outer folded edge (401) and the inner folded edge (406) are provided with a plurality of first mounting holes (405) arranged along their circumference.

4. The air duct structure according to claim 2, wherein The end of the air outlet pipe (3) is provided with a transition pipe (5), which is connected to the small end (404) of one of the ventilation pipes (4).

5. A duct structure according to claim 4, wherein Both ends of the adapter pipe (5) are provided with mounting edges (501), and the two mounting edges (501) are respectively connected to the inner folded edge (406) of one of the small ends (404) and the air outlet pipe (3).

6. A duct structure according to claim 5, wherein The mounting edge (501) is provided with a plurality of second mounting holes (502).

7. The air duct structure according to claim 5, wherein Sealing gaskets (402) are provided between the outer folded edges (401) of the two large ends (403) and the evaporator (2), between the inner folded edge (406) of one of the small ends (404) and the air outlet of the fan (1), and between the inner folded edge (406) of the other small end (404) and one of the mounting edges (501).

8. A grain cooler unit comprising a base (7), characterised in that The grain cooling unit also includes an air duct structure according to any one of claims 1-7.

9. A cereal cooling unit according to claim 8, characterised in that The base (7) is provided with a fixed bracket (6), and the air outlet pipe (3) is provided on the fixed bracket (6).

Images