A cabinet with cooling function

Abstract

The application discloses a cabinet with a cooling function, which comprises a box with an open front end, a cabinet door hinged to the open front end, a support component arranged at the bottom of the box, and a rack arranged in the box, wherein the rack comprises at least three support columns and a plurality of layers of plates arranged on the support columns, at least two air supply channels are arranged in the box, an air supply component for blowing air into the air supply channels is arranged at the bottom of the box, the diameter of a flow guide component arranged in the air supply channel changes and is distributed at intervals, so that a low-pressure air flow channel is formed between each layer of plates by the air flow supplied into the box, hot air between the baffle plates is drawn into the low-pressure air flow channel and discharged outside the box, and the function of cooling the electronic equipment between the baffle plates is realized. The application effectively realizes the cooling function between the layers of the cabinet by using Bernoulli's principle through a simple structure and a small-power air supply component, increases the loading capacity of the electronic equipment of the cabinet, and has the characteristics of low equipment cost, easy operation and maintenance, and low operation and maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of server racks, and more specifically to a server rack with a cooling function. Background Technology

[0002] In existing technologies, electromagnetic shielding cabinets are primarily located in computer rooms, which are typically treated to create low-dust or dust-free environments using dust removal and filtration devices. Large air conditioning systems are used to lower the overall temperature of the computer room. Electromagnetic shielding cabinets are generally fully enclosed enclosures welded from cold-rolled steel sheets, with multiple partitions inside to house the equipment. Axial fans and waveguide windows are installed only at the top and bottom to remove heat from the cabinet, thus cooling the equipment. However, due to the partitions, airflow is obstructed over a large area between the upper and lower layers, resulting in slow airflow around the equipment in the center of the partition, reduced heat exchange, and difficulty in lowering the equipment temperature. Therefore, it is generally recommended that the space occupied by existing electromagnetic shielding cabinets not exceed 60% to prevent overheating. This leads to a limited actual capacity of electronic equipment within the electromagnetic shielding cabinet.

[0003] To address the technical issue of limited loading capacity, a "sealed heat exchange electromagnetic shielding cabinet" was disclosed in Chinese patent literature, with publication number CN102573418B and authorization announcement date of January 20, 2016. This patent discloses a cabinet that uses a heat exchanger to cool the internal temperature within a sealed space. This solution requires an additional heat exchanger, resulting in higher manufacturing and operating costs. Furthermore, the air inlet and outlet are located at the top of the cabinet, and the air convection is smaller closer to the bottom, leading to poor cooling effect at the bottom. Moreover, the invention does not disclose the specific structure of the cold air channel, hot air channel, and arc-shaped guide groove, making it impossible to determine the actual effect of its cold and hot convection channels.

[0004] The patent "Air Circulation Device, Heat Dissipation Equipment and Cabinet" published in Chinese patent literature, with publication number CN109548358B and authorization announcement date of May 25, 2021, discloses a heat dissipation method similar to the air circulation method mentioned above, and discloses the specific structure. However, the heat dissipation method of this patent is an internal circulation heat dissipation method, which requires an additional cooling source to be equipped in the cabinet. When the hot air inside the equipment meets the cooling source, it will produce condensation water, which will increase the humidity inside the cabinet. Therefore, the cabinet in this patent is also equipped with a dehumidification mechanism, which increases the complexity of the cabinet itself, the failure rate and maintenance cost.

[0005] When addressing the issue of cooling electronic equipment inside server racks, the core of both invention patents lies in how to drive the airflow between the partitions to remove heat. This inevitably leads to more complex equipment, resulting in more complex rack structures, increased purchase and maintenance costs, and disadvantages for customers.

[0006] Therefore, based on existing technologies, it is necessary to design a cooling cabinet that can be densely used in clean or low-dust computer rooms, while also taking into account good cooling effect, large electronic equipment loading capacity, simple structure, and low operation and maintenance cost. Summary of the Invention

[0007] The purpose of this invention is to provide a cabinet with a cooling function to solve the problems described in the background art. By varying the diameter and spacing of the air guiding components within the air supply duct, a low-pressure airflow channel is established between each shelf of the airflow entering the cabinet. This draws hot air between the partitions into the low-pressure airflow channel and exhausts it outside the cabinet, thus achieving the function of cooling the electronic equipment between the partitions. With only a simple structure and low-power air supply components, and utilizing Bernoulli's principle, the cooling function between the internal partitions of the cabinet is effectively achieved, increasing the cabinet's electronic equipment capacity. It also features low equipment cost, easy maintenance, and low operating costs.

[0008] The technical solution of this invention is implemented as follows:

[0009] A cooling cabinet includes a front-opening enclosure with a hinged door. The bottom of the enclosure has a support component, and the enclosure also has a rack inside. The rack includes at least three support columns and several shelves mounted on the support columns. The enclosure has at least two air supply channels, each including an air inlet on the bottom wall of the enclosure, an air outlet on the top wall of the enclosure, and through holes on the shelves. The through holes, air inlets, and air outlets are coaxially arranged, i.e., the through holes are directly above the air inlets and the air outlets are directly above the through holes.

[0010] The chamber is also equipped with a flow guiding component, which includes a jet pipe and an air collection pipe;

[0011] A jet pipe is detachably installed on the bottom wall of the box, and the air outlet is located inside the jet pipe.

[0012] A jet pipe is detachably installed at the upper end of the shelf, and a gas collecting pipe is detachably installed at the lower end of the shelf. The through hole is located within the internal range of the jet pipe and the gas collecting pipe on the shelf.

[0013] An air collection pipe is detachably installed on the top wall of the box, and the air outlet is located inside the air collection pipe on the top wall of the box.

[0014] The distance between the top of the jet pipe on the bottom wall of the box and the bottom of the air collection pipe of the lowest shelf is at least 5 cm, the distance between the top of the jet pipe on the lower shelf and the bottom of the air collection pipe on the upper shelf is at least 5 cm, and the distance between the top of the jet pipe on the upper shelf and the bottom of the air collection pipe on the top wall of the box is at least 5 cm.

[0015] The jet pipe and the air collection pipe on the same air supply channel are coaxially arranged, and the inner diameter of the top port of the jet pipe is smaller than the inner diameter of the bottom port of the air collection pipe.

[0016] The bottom of the box is also equipped with an air supply component that blows air into the air outlet, and the distance between the air supply component and the air outlet is at least 5 centimeters.

[0017] A further technical solution is that the air supply component is a fan, which is fixedly mounted on the outer bottom wall of the box by a bracket, and the diameter of the fan's air outlet is smaller than the diameter of the air supply outlet.

[0018] A further technical solution is that the air inlet, through hole, and air outlet have the same diameter, the bottom port inner diameter of the jet pipe is the same as the through hole diameter, and the top port inner diameter of the air collecting pipe is the same as the through hole diameter.

[0019] A further technical solution is that the jet pipe is a variable diameter pipe, the inner diameter of the top port of the jet pipe is smaller than the inner diameter of the bottom port, the inner wall of the jet pipe smoothly transitions from bottom to top, and the inner wall of the jet pipe is in the shape of a bullet that tapers upward.

[0020] A further technical solution is that the inner diameter of the top port of the jet pipe is 2 / 3 to 3 / 4 times the inner diameter of the bottom port.

[0021] A further technical solution is that the distance between the top of the jet pipe on the bottom wall of the box and the bottom of the air collection pipe of the lowest shelf is 13-18 cm, the distance between the top of the jet pipe on the lower shelf and the bottom of the air collection pipe on the upper shelf is 13-18 cm, and the distance between the top of the jet pipe on the uppermost shelf and the bottom of the air collection pipe on the top wall of the box is 13-18 cm.

[0022] A further technical solution is that the diameter of the blower's air outlet is 2 / 3 to 3 / 4 times the diameter of the air supply outlet, and the distance between the blower and the air supply outlet is at least 10 to 20 centimeters.

[0023] A further technical solution is that the inner diameter of the bottom port of the gas collecting pipe is not less than the inner diameter of the top port, the inner wall of the gas collecting pipe transitions smoothly from bottom to top, and the inner wall of the gas collecting pipe is in the shape of a trumpet that expands downward.

[0024] A further technical solution is that the inner diameter of the bottom port of the gas collecting pipe is 1.3-1.6 times the inner diameter of the top port.

[0025] A further technical solution is that waveguide windows are provided in both the air supply port and the air outlet.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. By setting the size and position of the air supply channel and the bottom fan of the cabinet, the airflow is delivered by the axial flow motor. The airflow delivered by the axial flow fan itself carries other air mixed in due to the pressure difference into the cabinet. The airflow is accelerated by the change in diameter of the jet pipe, from the large diameter pipe to the small diameter pipe. The accelerated airflow is injected into the guide component of the upper shelf. A low-pressure channel is formed between the air collection pipe on the shelf and the lower jet pipe. The air between the shelf and the bottom wall will flow rapidly towards the low-pressure channel and be carried into the air collection pipe by the upward airflow. Then it will be ejected through the jet pipe on the shelf and into the guide component of the next shelf. In this process, the air between each shelf will flow rapidly towards the low-pressure channel between the shelf and the shelf, continuously drawing away the hot air around the electronic equipment and finally discharging it through the air outlet at the top of the cabinet, realizing heat exchange and reducing the temperature inside the cabinet. This increases the load capacity of electronic equipment inside the cabinet while ensuring the cooling effect.

[0028] 2. Although the fan itself does not deliver much air, the low-pressure channel established by it and the air guiding components can draw airflow exceeding its own delivery volume, thereby achieving a cooling effect exceeding its own delivery power through low-power and low-consumption air delivery technology.

[0029] 3. The structure of this invention is simple, and the cooling electrical equipment used only uses an axial flow fan. Therefore, the equipment cost is low, the failure rate is low, maintenance is faster and more convenient, and the operation and maintenance cost is low. Attached Figure Description

[0030] Figure 1 This is a sectional view of the internal structure of the server rack;

[0031] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0032] Figure 3 for Figure 1 Enlarged structural diagram at point B;

[0033] Figure 4 This is a three-dimensional schematic diagram of the frame structure;

[0034] Figure 5 A three-dimensional schematic diagram of the combined structure of the layer plate and the flow guiding component;

[0035] Figure 6 This is a diagram illustrating the airflow principle inside the enclosure.

[0036] In the diagram, 1. Box body, 2. Supporting component, 3. Column, 4. Shelf, 5. Flow guide component, 6. Horizontal frame, 7. Injection pipe, 8. Air collection pipe, 9. Through hole, 10. Bracket, 11. Fan, 12. Air outlet, 13. Waveguide window, 14. Air outlet, 15. Mounting hole, 16. Collar, 17. Bolt hole, 18. Ring groove. Detailed Implementation

[0037] To better understand the technical content of this invention, specific embodiments are provided below, and the invention will be further described in conjunction with the accompanying drawings.

[0038] It is important to note that shielded cabinets (hereinafter referred to as cabinets) are a relatively mature product, with many manufacturers and models available on the market. Here, we list a common cabinet model, taking the RC-PBG model from the 'Ruicheng' brand as an example. This model includes a base, top cover, and side walls. Internally, it houses the rack. The top cover and base have upper and lower waveguide windows, and it has a front and rear door. The front door is hinged and features door blades, spring clips, and other sealing mechanisms. The cabinet contains filters, and cabling is routed through waveguides. This cabinet's shielding effectiveness meets the BMB19-2006 Class C standard. The enclosure is constructed from 1.5mm thick cold-rolled steel plates, forming a fully enclosed box. The front shielding door consists of shielding spring clips and cold-rolled steel plate welded door panels. The rack's vertical and horizontal position is adjustable, and the shelves for electronic equipment can be adjusted in height using matching bolts. The ventilation waveguide windows are honeycomb type, and the power filter has a wide suppression bandwidth and high insertion loss. The network cable transmission waveguide uses a Φ8*120mm copper transmission cable waveguide with flexible clamps. The optical waveguide uses a Φ14*140mm copper-plated optical fiber transmission waveguide. Internal electrical sockets and switches are included.

[0039] Any content not mentioned below in this specific embodiment does not involve structural modifications or configuration changes to the cabinets in the prior art. Those skilled in the art, who are familiar with the structure and configuration of existing cabinets, can fully implement the structure and functions involved in this invention based on the content of this specific embodiment.

[0040] See Figures 1 to 6 A cooling cabinet, as described in the specific embodiment above, includes a fully enclosed enclosure 1 with a front opening, welded from cold-rolled steel plates. A cabinet door, which is a shielded door, is hinged to the front opening. A support component 2 is provided at the bottom of the cabinet; the support component 2 can be casters or support feet, designed to lift the bottom of the cabinet off the ground. The enclosure 1 has a frame, which includes four support columns 3 and several shelves 4 installed between the support columns 3.

[0041] Specifically, the four support pillars 3 are angle steel, each with multiple mounting holes 15 distributed at its top and bottom. The four angle steels are positioned at the four corners of the virtual rectangle, and crossbeams 6 connect the angle steels. Multiple right-angle brackets 10 are screwed onto the mounting holes 15 of the angle steels. Bolt holes 17 are provided at both ends of the crossbeams 6, which are screwed onto the right-angle brackets 10 for fixation to the angle steels. When the height of the crossbeams 6 needs to be adjusted, the position of the right-angle brackets 10 at the mounting holes 15 is changed. There are many ways to fix the adjustable-height crossbeams 6 to the angle steels; those skilled in the art can easily achieve this function using other publicly available technical means. Therefore, the connection method between the crossbeams 6 and the angle steel mentioned herein cannot be used to limit the implementation of this solution.

[0042] Sheet 4 rests on crossbeam 6. Bolt holes 17 are provided on both the edge of shelf 4 and the middle of crossbeam 6. Sheet 4 is positioned and installed by bolts passing through both the edge of shelf 4 and the bolt holes 17 in the middle of crossbeam 6. There are many ways to position and install shelf 4 on crossbeam 6, such as pin-type installation and slotted embedded installation. Those skilled in the art can easily achieve this function using other publicly available technical means. Therefore, the connection method between shelf 4 and crossbeam 6 mentioned in this article cannot be used to limit the implementation of this solution.

[0043] Specifically, a circular air inlet 12 is provided on the bottom wall of the housing 1, and a waveguide window 13 is installed inside the air inlet 12. A circular air outlet 14 is provided on the top wall of the housing 1, and a waveguide window 13 is installed inside the air outlet 14. An air supply component is provided below the waveguide window 13 of the air inlet 12. The air supply component can be an external air supply pipe or a fan 11 directly installed. For better applicability, it is preferred to use a fan 11 as the air supply component. Preferably, the fan 11 is an axial flow fan 11. The axial flow fan 11 is installed on the outer bottom wall of the housing 1 via a bracket 10. The distance between the axial flow fan 11 and the air inlet 12 is at least 5 cm, preferably 10-20 cm. The diameter of the air outlet of the axial flow fan 11 is smaller than the diameter of the air outlet 12. Preferably, the diameter of the air outlet of the axial flow fan 11 is 2 / 3 to 3 / 4 times the diameter of the air outlet 12. The axial flow fan 11 blows air towards the air outlet 12 at the bottom of the housing 1, forming a high-speed airflow channel between the axial flow fan 11 and the air outlet 12. According to Bernoulli's principle, the pressure in this airflow channel is low, and the air around the channel will flow towards it under the influence of the pressure difference. Driven by the high-speed airflow, the air enters the housing 1, providing an airflow exceeding the capacity of the axial flow fan 11 itself. Due to the size limitations of the housing 1, the axial flow fan 11 typically uses an airflow rate of 1–1.5 m³ / s. 3The specification is / min. Normally, if a larger airflow is needed, the fan 11 needs to be enlarged or the motor speed and power increased. However, the size of the housing 1 itself limits the size of the fan 11, and increasing the motor speed and power would result in greater wind noise and higher power consumption. Therefore, this design can provide more airflow inside the housing 1 within the constraints of a small-power, small-specification axial fan 11.

[0044] It is important to note that the airflow entering the chassis from the air outlet 12 will directly impact the bottom shelf 4 without guidance. This impact causes turbulence and disordered airflow. While this cools the equipment between the bottom shelf 4 and the bottom wall of the chassis 1, it fails to effectively cool the equipment on the upper shelves 4. Therefore, an airflow channel needs to be designed to guide this airflow from the air outlet 12 upwards in an orderly manner.

[0045] Specifically, the housing 1 is equipped with a flow guiding component 5, which includes a jet pipe and an air collecting pipe 8. Both the jet pipe and the air collecting pipe 8 are variable diameter pipes. The inner diameter of the top port of the jet pipe is smaller than that of the bottom port, and the inner wall of the jet pipe smoothly transitions from bottom to top, forming a bullet-shaped structure that tapers upwards. The inner diameter of the bottom port of the air collecting pipe 8 is not smaller than that of the top port, and the inner wall of the air collecting pipe 8 smoothly transitions from bottom to top, forming a trumpet-shaped structure that expands downwards. The inner diameter of the bottom port of the air collecting pipe 8 is not smaller than that of the top port of the jet pipe.

[0046] A jet pipe is installed on the bottom wall of the inner chamber 1, and the jet pipe is mounted on the air outlet 12, which is located within the jet pipe. A through hole 9 is provided at the corner of the shelf 4, with a jet pipe at the top of the through hole 9 and an air collecting pipe 8 at the bottom. The through hole 9 is located within the space of the jet pipe and the air collecting pipe 8 on the shelf 4. An air collecting pipe 8 is provided on the top wall of the inner chamber 1, and the air outlet 14 is located within the space of the air collecting pipe 8 on the top wall of the inner chamber 1. The air inlet 12, through hole 9, and air outlet 14 are coaxially arranged, with through hole 9 directly above air inlet 12 and air outlet 14 directly above through hole 9. The gas supplied by the axial flow fan 11 flows vertically upward through the injection pipe 7 on the bottom wall of the housing 1, then enters the guide component 5 of the upper shelf 4, and is then ejected through the guide component 5 and into the guide component 5 of the even higher shelf 4. This cycle continues until the airflow finally enters the air collection pipe 8 on the top wall of the housing 1 and is then discharged from the housing 1 through the air outlet. The air inlet 12, through hole 9, guide component 5, and air outlet 14 together form the air supply channel.

[0047] Specifically, the inner diameter of the bottom port of the jet pipe is not less than the diameter of the air outlet 12, the inner diameter of the bottom port of the jet pipe is equal to the diameter of the through hole 9, and the inner diameter of the top port of the air collecting pipe 8 is exactly equal to the diameter of the through hole 9.

[0048] Specifically, a collar 16 is welded to the inner bottom wall of the housing 1 at the air outlet 12. The inner diameter of the collar 16 is equal to the diameter of the air outlet 12, and the outer diameter of the collar 16 is 0.5 to 1 cm larger than the inner diameter, meaning the collar 16 has a thickness of 0.25 to 0.5 cm and a height of 1 to 2 cm. The jet pipe is made of synthetic rubber with a certain hardness and elasticity, such as polyurethane rubber or butadiene rubber. The inner diameter of the top end of the jet pipe is 2 / 3 to 3 / 4 times the inner diameter of the bottom end, and the inner diameter of the bottom end of the jet pipe is equal to the diameter of the air outlet 12. An annular groove 18 is provided at the bottom opening of the jet pipe, and the diameter of the annular groove 18 is not greater than the outer diameter of the collar 16. The annular groove 18 of the jet pipe is fitted onto the collar 16, and the jet pipe is fitted onto the inner bottom wall of the housing 1.

[0049] Specifically, the diameter of the through hole 9 is the same as the diameter of the air outlet 12. The top and bottom surfaces of the shelf 4 at the through hole 9 are welded with collars 16. The through hole 9 is inside the collar 16. The inner diameter of the bottom port of the air collecting pipe 8 is 1.3-1.6 times the inner diameter of the top port.

[0050] Specifically, the interval between shelves 4 is 25-30 cm, preferably 30 cm. The distance between the top of the jet pipe on the bottom wall of the box 1 and the bottom of the air collection pipe 8 of the lowest shelf 4 is at least 5 cm, preferably 13-18 cm; the distance between the top of the jet pipe on the lower shelf 4 and the bottom of the air collection pipe 8 of the upper shelf 4 is at least 5 cm, preferably 13-18 cm; the distance between the top of the jet pipe on the uppermost shelf 4 and the bottom of the air collection pipe 8 on the top wall of the box 1 is at least 5 cm, preferably 13-18 cm.

[0051] Specifically, the diameter of the air outlet 14 is the same as that of the air supply outlet 12. A collar 16 is welded on the top wall of the inner wall of the housing 1. The air outlet 14 is located inside the collar 16, and the air collection pipe 8 is sleeved on the collar 16.

[0052] Specifically, two through holes 9 are provided on the shelf 4. The second through hole 9 is provided at another corner of the shelf 4 away from the first through hole 9. Correspondingly, air inlets 12 and air outlets 14 that match the second through hole 9 are provided at corresponding positions on the top and bottom walls of the housing 1. Axial flow fans 11, waveguide windows 13, and air guide components 5 are installed at the second through hole 9, air inlets 12, and air outlets 14.

[0053] Specifically, three through holes 9 are provided on the shelf 4. The third through hole 9 is provided at another corner of the shelf 4. Correspondingly, air inlets 12 and air outlets 14 that match the third through hole 9 are provided at corresponding positions on the top and bottom walls of the housing 1. Axial flow fans 11, waveguide windows 13, and air guide components 5 are installed at the third through hole 9, air inlets 12, and air outlets 14.

[0054] Specifically, four through holes 9 are provided on the shelf 4, and the four through holes 9 are respectively opened at the corners of the shelf 4 near the support column 3, that is, the four through holes 9 will not affect the electronic equipment rack after the air guiding component 5 is installed. Air inlets 12 and air outlets 14 are provided at corresponding positions on the top and bottom walls of the housing 1 to match the fourth through hole 9, and axial flow fans 11, waveguide windows 13, and air guiding components 5 are installed at the fourth through hole 9, air inlets 12, and air outlets 14 respectively.

[0055] Working principle of this invention:

[0056] See Figure 6 After the airflow is sent out by the axial flow motor, the airflow sent out by the axial flow fan 11 carries other air mixed in due to the pressure difference into the interior of the housing 1. The airflow is accelerated by the change in diameter of the jet pipe 7, from the large diameter to the small diameter. The accelerated airflow is injected into the guide component 5 of the upper shelf 4. A low-pressure channel is formed between the air collecting pipe 8 on the shelf 4 and the lower jet pipe 7. The air between the shelf 4 and the bottom wall will flow rapidly towards the low-pressure channel and be carried into the air collecting pipe 8 by the upward airflow. Then it will be ejected through the jet pipe 7 on the shelf 4 and enter the guide component 5 of the upper shelf 4. In this process, the air between each shelf 4 will flow rapidly towards the shelf 4 and the low-pressure channel between the shelf 4. This will draw away the hot air around the electronic equipment and finally discharge it through the air outlet at the top of the housing 1, realizing heat exchange and reducing the temperature inside the housing 1.

[0057] The function of the airflow guide component 5 is to ensure that the airflow below is received in an orderly manner and then accelerated and ejected, creating a low-pressure airflow channel between the shelves 4. The cooling principle of this invention does not utilize the airflow directly blown out by the axial fan 11 to cool the electronic equipment on the shelves 4, but rather drives the air between the shelves 4 to circulate through the low-pressure airflow channel, thereby removing heat from the electronic equipment at the center of the shelves 4. Although the axial fan 11 itself has a small airflow volume, the low-pressure channel established by it in conjunction with the airflow guide component 5 can attract an airflow exceeding its own airflow volume.

[0058] It is important to note that all four axial flow fans 11 should not be turned on simultaneously when using this cabinet. At least one axial flow fan 11 must be kept off. The air outlet 12 corresponding to the off axial flow fan 11 is used to regulate the air pressure inside the cabinet and to replenish fresh air. When the equipment temperature is not high, turn on one axial flow fan 11. As the equipment temperature rises, turn on all three axial flow fans 11. The fourth axial flow fan 11 serves as a backup fan 11, which can be put into use if one of the axial flow fans 11 fails, providing a buffer time for equipment maintenance.

[0059] The structure of this invention is simple, and the cooling electrical equipment used only uses an axial flow fan 11. Therefore, the equipment cost is low, the failure rate is low, maintenance is faster and more convenient, and the operation and maintenance cost is low.

[0060] The distance between the shelves 4 can be adjusted according to the size of different equipment. A low-pressure channel can be constructed simply by replacing the injection pipe 7 and the gas collection pipe 8 of different lengths according to the distance between the shelves 4. It has good applicability and practicality.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cooling cabinet, comprising a front-opening enclosure with a hinged door, a support component at the bottom of the enclosure, and an internal rack, the rack comprising at least three support columns and several shelves mounted on the support columns, characterized in that: The box is provided with at least two air supply channels. The air supply channels include an air inlet on the bottom wall of the box, an air outlet on the top wall of the box, and a through hole on the shelf. The through hole, air inlet, and air outlet are coaxially arranged, that is, the through hole is directly above the air inlet and the air outlet is directly above the through hole. The chamber is also equipped with a flow guiding component, which includes a jet pipe and an air collection pipe; A jet pipe is detachably installed on the bottom wall of the box, and the air outlet is located inside the jet pipe. A jet pipe is detachably installed at the upper end of the shelf, and a gas collecting pipe is detachably installed at the lower end of the shelf. The through hole is located within the internal range of the jet pipe and the gas collecting pipe on the shelf. An air collection pipe is detachably installed on the top wall of the box, and the air outlet is located inside the air collection pipe on the top wall of the box. The distance between the top of the jet pipe on the bottom wall of the box and the bottom of the air collection pipe of the lowest shelf is at least 5 cm, the distance between the top of the jet pipe on the lower shelf and the bottom of the air collection pipe on the upper shelf is at least 5 cm, and the distance between the top of the jet pipe on the upper shelf and the bottom of the air collection pipe on the top wall of the box is at least 5 cm. The jet pipe and the air collection pipe on the same air supply channel are coaxially arranged, and the inner diameter of the top port of the jet pipe is smaller than the inner diameter of the bottom port of the air collection pipe. The bottom of the box is also equipped with an air supply component that blows air into the air outlet, and the distance between the air supply component and the air outlet is at least 5 centimeters.

2. A cabinet with cooling function according to claim 1, characterized in that: The air supply component is a fan, which is fixed to the outer bottom wall of the box by a bracket. The diameter of the fan's air outlet is smaller than the diameter of the air supply outlet.

3. A cabinet with cooling function according to claim 2, characterized in that: The air inlet, through hole, and air outlet have the same diameter. The inner diameter of the bottom port of the jet pipe is the same as the diameter of the through hole, and the inner diameter of the top port of the air collecting pipe is the same as the diameter of the through hole.

4. A cabinet with cooling function according to claim 3, characterized in that: The jet pipe is a variable diameter pipe, with the inner diameter of the top port being smaller than that of the bottom port. The inner wall of the jet pipe transitions smoothly from bottom to top, and the inner wall of the jet pipe is bullet-shaped, tapering upwards.

5. A cabinet with cooling function according to claim 4, characterized in that: The inner diameter of the top port of the jet pipe is 2 / 3 to 3 / 4 times the inner diameter of the bottom port.

6. A cabinet with cooling function according to claim 5, characterized in that: The distance between the top of the jet pipe on the bottom wall of the box and the bottom of the air collection pipe of the lowest shelf is 13-18 cm, the distance between the top of the jet pipe on the lower shelf and the bottom of the air collection pipe on the upper shelf is 13-18 cm, and the distance between the top of the jet pipe on the uppermost shelf and the bottom of the air collection pipe on the top wall of the box is 13-18 cm.

7. A cabinet with cooling function according to claim 6, characterized in that: The diameter of the blower's air outlet is 2 / 3 to 3 / 4 of the diameter of the air supply outlet, and the distance between the blower and the air supply outlet is 10 to 20 centimeters.

8. A cabinet with cooling function according to claim 7, characterized in that: The inner diameter of the bottom port of the gas collecting tube is not less than the inner diameter of the top port. The inner wall of the gas collecting tube transitions smoothly from bottom to top and is shaped like a trumpet that widens downwards.

9. A cabinet with cooling function according to claim 8, characterized in that: The inner diameter of the bottom port of the gas collecting pipe is 1.3-1.6 times the inner diameter of the top port.

10. A cabinet with cooling function according to claim 9, characterized in that: Both the air supply port and the air outlet are equipped with waveguide windows.

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