Semi-enclosed cooling device and cooling method for sealed electrical cabinet

Abstract

The present invention provides a semi-enclosed cooling device and cooling method for a sealed electrical cabinet, comprising a cabinet for arranging components, a cabinet door for sealing the cabinet, and a circulating flow channel for the flow of cooling liquid arranged inside the cabinet, a gas flow channel connected to the outside is arranged on the top of the cabinet, the gas flow channel comprises a heat exchange chamber and a fan for supplying air to the heat exchange chamber, the circulating flow channel comprises a heat exchange pipe passing through the heat exchange chamber, a cleaning chamber connected in parallel with the heat exchange chamber is arranged on the gas flow channel, and the cleaning chamber and the heat exchange chamber can be switched by a baffle driven by an electric push rod, the cleaning chamber is connected to a nozzle arranged in the gas flow channel through the cleaning pipe, the nozzle is driven to move horizontally by an adjustment component, and the output end of the nozzle is aligned with a filter element. The present invention solves the problem that dust is easily accumulated in the heat dissipation cavity and the accumulated dust is difficult to clean in the prior art, and produces the effect of maintaining the heat exchange capacity of the cooling liquid and the external air and extending the service life of the cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical cabinets, and in particular to a semi-enclosed cooling device and a cooling method for a sealed electrical cabinet. Background Art

[0002] An electrical cabinet is a metal cabinet that contains and protects components for normal operation and has a wide range of applications.

[0003] Depending on the application scenarios, the requirements for electrical cabinets are different. In conventional indoor environments, electrical cabinets are usually equipped with cooling fans to dissipate heat from components inside the cabinet by accelerating the gas exchange between the inside of the cabinet and the outside world. Electrical cabinets installed outdoors or in dusty sites have certain requirements for sealing. The sealing of the electrical cabinet needs to be ensured to maintain the service life of the components inside the electrical cabinet. Sealed electrical cabinets need to cool the inside of the cabinet through heat exchange media.

[0004] For example, Chinese patent CN112888280B discloses a multifunctional electrical cabinet, which can seal the interior to prevent dust and cool the interior of the electrical cabinet through a water exchange type heat dissipation device arranged inside. However, the cooling of the heat dissipation water of the electrical cabinet is carried out through gas exchange with the outside through a fan and a heat dissipation cavity. In the case of severe external dust, the heat dissipation cavity arranged inside the cabinet is prone to dust accumulation, which affects the cooling of the heat dissipation water. Moreover, the heat dissipation cavity is arranged inside the cabinet as a whole, which makes it difficult to clean the dust, thereby shortening the service life of the electrical cabinet. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a semi-enclosed cooling device and a cooling method for a sealed electrical cabinet, which solves the problem in the prior art that dust is easily accumulated in the heat dissipation cavity and the accumulated dust is difficult to clean.

[0006] According to an embodiment of the present invention, a semi-enclosed cooling device for a sealed electrical cabinet includes a cabinet body for arranging components, a cabinet door for sealing the cabinet body, and a circulating flow channel for the flow of coolant arranged inside the cabinet body, a gas flow channel connected to the outside is arranged on the top of the cabinet body, the gas flow channel includes a heat exchange chamber and a fan for supplying air to the heat exchange chamber, the circulating flow channel includes a heat exchange pipe passing through the heat exchange chamber, a cleaning chamber connected in parallel with the heat exchange chamber is arranged on the gas flow channel, and the cleaning chamber and the heat exchange chamber can be switched by a baffle driven by an electric push rod, the cleaning chamber is connected to a nozzle arranged in the gas flow channel through the cleaning pipe, the nozzle is driven to move horizontally by an adjusting component, and the output end of the nozzle is aligned with the filter element.

[0007] Preferably, the gas flow channel also includes an air inlet duct and an air outlet duct arranged on both sides of the top of the cabinet, the adjustment component includes an adjustment screw arranged in the air inlet duct, the nozzle thread is arranged on the adjustment screw, and is driven by a driving member arranged on the air inlet duct.

[0008] Preferably, the air inlet of the air inlet pipe is arranged downward, and a fence is provided at the air inlet, and the filter element is arranged on the top of the fence.

[0009] Preferably, a hose section and a hard pipe section are respectively provided at both ends of the cleaning pipe, and the hard pipe section is connected to the nozzle.

[0010] Preferably, the circulation channel comprises a liquid outlet chamber and a cooling chamber respectively arranged at the top and the bottom of the heat exchange chamber, and the liquid outlet chamber and the cooling chamber are connected through the heat exchange tube.

[0011] Preferably, the cooling chamber is divided by a heat exchange plate arranged in the cabinet, and the cooling chamber covers the opposite side walls and the top wall inside the cabinet.

[0012] Preferably, a vertical rod for increasing the strength of the heat exchange plate is provided between the heat exchange plate and the inner wall of the cabinet.

[0013] Preferably, the circulation channel also includes a liquid collecting tank arranged at the bottom of the cabinet for collecting the coolant that has exchanged heat with the components, and the liquid collecting tank is provided with a flow pump and an upper liquid pipe for transporting the coolant to the top of the cabinet, and the upper liquid pipe is arranged on the outside of the cabinet.

[0014] Preferably, a guardrail for surrounding the upper liquid pipe is provided on the side wall of the cabinet, and reinforcing plates are evenly arranged on the guardrail.

[0015] A cooling method for a semi-enclosed cooling device of a sealed electrical cabinet comprises the following steps: Step 1: Internal cooling, the coolant inside the liquid collecting box is transported to the liquid outlet cavity through the upper liquid pipe by a flow pump on the liquid collecting box, so that the coolant in the circulating flow channel starts to flow, and the coolant at the top of the circulating flow channel flows downward to the cooling cavity, and exchanges heat with the inside of the cabinet through the heat exchange plate, so as to cool the components installed inside the cabinet; Step 2: External cooling, after the coolant in the circulating flow channel starts to flow, the fan is energized, and at the same time, the electric push rod controls the baffle to block the entrance of the cleaning chamber, and the external gas enters the heat exchange chamber, and the flowing coolant is cooled by the heat exchange pipe; Step 3: Dust removal, the electric push rod is controlled to regularly drive the baffle to seal the air inlet of the heat exchange chamber, so that the gas enters the cleaning chamber, and the gas flushes the filter element through the cleaning pipe and the nozzle, and the nozzle comprehensively flushes the filter element under the action of the drive member and the adjusting screw.

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

[0017] 1. The interior of the cabinet is cooled by the circulating flow channel through which the coolant flows, and then the circulating flow channel through which the coolant flows inside the cabinet is heat exchanged by the gas flow channel connected to the outside, so as to increase the cooling rate of the coolant in the circulating flow channel in the form of increasing the air flow rate. The circulating flow channel and the gas flow channel are not connected to the accommodating area of ​​the components inside the cabinet, so as to avoid the accumulation of components and improve the service life of the components inside the electrical cabinet.

[0018] 2. Filter the gas entering the air flow channel through the filter element to prevent dust from entering the gas flow channel and causing accumulation, and keep the circulation flow channel and the gas flow channel in a good heat exchange state.

[0019] 3. Regular reverse high-pressure flushing of the filter element is carried out through the cleaning chamber, cleaning pipe and nozzle to maintain the air intake of the filter element and extend the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0021] Figure 2 It is a structural schematic diagram of another direction of an embodiment of the present invention.

[0022] Figure 3 It is a front view of an embodiment of the present invention.

[0023] Figure 4 FIG. 4 is a top view of an embodiment of the present invention.

[0024] Figure 5 for Figure 4 Section view of the AA plane.

[0025] Figure 6 for Figure 5 Magnified view of area C.

[0026] Figure 7 It is a rear view of an embodiment of the present invention.

[0027] Figure 8 for Figure 7 Sectional view of the BB plane.

[0028] In the above drawings: 1. cabinet body; 2. cabinet door; 3. air inlet duct; 4. fan; 5. air outlet duct; 6. partition; 7. electric push rod; 8. baffle; 9. cleaning chamber; 10. heat exchange chamber; 11. cooling chamber; 12. heat exchange plate; 13. liquid collecting box; 14. liquid outlet chamber; 15. heat exchange tube; 16. fence; 17. filter element; 18. cleaning tube; 19. nozzle; 20. upper liquid pipe; 21. driving member; 22. adjusting screw. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] like Figure 1-8 As shown, in order to achieve a sealed electrical cabinet in an environment with severe dust pollution, the components inside the cabinet have a longer service life. The present invention proposes a semi-enclosed cooling device for a sealed electrical cabinet, comprising a cabinet body 1 for arranging components, a cabinet door for sealing the cabinet body 1, and a circulating flow channel for the flow of coolant arranged inside the cabinet body 1. The top of the cabinet body 1 is provided with a gas flow channel connected to the outside, the gas flow channel includes a heat exchange chamber 10 and a fan 4 for supplying air to the heat exchange chamber 10, the circulating flow channel includes a heat exchange pipe 15 passing through the heat exchange chamber 10, a cleaning chamber 9 connected in parallel with the heat exchange chamber 10 is provided on the gas flow channel, and the cleaning chamber 9 and the heat exchange chamber 10 can be switched by a baffle 8 driven by an electric push rod 7, the cleaning chamber 9 is connected to a nozzle 19 arranged in the gas flow channel through a cleaning pipe 18, the nozzle 19 is driven to move horizontally by an adjustment component, and the output end of the nozzle 19 is aligned with the filter element 17.

[0031] A temperature sensor is arranged inside the cabinet 1, and the flow conditions of the coolant in the circulation channel and the air in the gas channel are changed accordingly according to the readings of the temperature sensor. When the temperature is high, the flow rate of the coolant in the circulation channel is faster and the gas flow rate in the gas channel increases.

[0032] The heat exchange chamber 10 for the coolant and gas is arranged at the inner top of the cabinet 1. Since the hot air is located at the top, the coolant that has just been cooled can immediately exchange heat with the inner top of the cabinet 1, thereby preventing the top temperature of the cabinet 1 from being too high.

[0033] The filter element 17 is an air filter plate, and the nozzle 19 adopts a high-pressure gas nozzle. The nozzle 19 adopts a single-point jet form and is moved by adjusting the component, so that the entire filter element 17 can be backwashed; at the same time, when the nozzle 19 is flushing the filter element 17, since the flushing location each time is only a single point on the filter element 17, the impact on the air intake of the entire filter element 17 is limited, and when setting the nozzle 19, the nozzle of the nozzle 19 needs to be fitted with the top surface of the filter element 17.

[0034] The cabinet body 1 needs to be sealed, and a sealing ring is provided on the inner edge of the cabinet door 2. The locking piece of the cabinet door 2 is a spring in a stretched state, and the spring is sleeved on the connecting rod of the locking block of the cabinet door 2. After the cabinet door 2 is closed, the spring in a stretched state will exert a force on the locking block toward the outside of the cabinet body 1, driving the connecting rod to move toward the outside of the cabinet body 1, thereby ensuring that the edge of the cabinet door 2 fits tightly with the cabinet body 1.

[0035] like Figure 1-8As shown, the reciprocating movement of the nozzle 19 is realized. The gas flow channel also includes an air inlet pipe 3 and an air outlet pipe 5 arranged on both sides of the top of the cabinet 1. The adjustment component includes an adjustment screw 22 arranged in the air inlet pipe 3. The nozzle 19 is threadedly arranged on the adjustment screw 22 and driven by a driving member 21 arranged on the air inlet pipe 3. The nozzle of the nozzle 19 is strip-shaped, and its width is equal to the width of the filter element 17, so that the filter element 17 can be cleaned by the reciprocating movement of the nozzle 19 along the adjustment screw 22; the driving member 21 is a motor whose output shaft is coaxially fixedly connected to one end of the adjustment screw 22, and a protective cover is arranged above the motor.

[0036] like Figure 1-2 As shown, in order to prevent large debris from blocking the filter element 17. The air inlet of the air inlet pipe 3 is arranged downward, and a fence 16 is arranged at the air inlet, and the filter element 17 is arranged on the top of the fence 16.

[0037] like Figure 2 As shown, when the nozzle 19 cleans the filter element 17, the cleaning pipe 18 needs to enter and exit the air inlet pipe 3, and a sleeve is provided on the air inlet pipe 3, and the sleeve cooperates with the hard pipe section of the cleaning pipe 18 to reduce the resistance of the movement of the cleaning pipe 18. The two ends of the cleaning pipe 18 are respectively provided with a hose section and a hard pipe section, and the hard pipe section is connected to the nozzle 19.

[0038] like Figure 5-6 As shown, the circulation channel includes a liquid outlet chamber 14 and a cooling chamber 11 respectively arranged at the top and bottom of the heat exchange chamber 10, and the liquid outlet chamber 14 and the cooling chamber 11 are connected through the heat exchange tube 15. The heat exchange chamber 10 and the liquid outlet chamber 14 are separated by a partition 6. In the case of heat exchange through the heat exchange tube 15, the heat exchange chamber 10 and the liquid outlet chamber 14 can also exchange heat through the partition 6, thereby increasing the heat exchange area.

[0039] like Figure 5 As shown, the heat exchange area between the cabinet 1 and the cooling liquid in the cooling chamber 11 is increased. The cooling chamber 11 is separated by a heat exchange plate 12 arranged in the cabinet 1, and the cooling chamber 11 covers the opposite side walls and top wall of the cabinet 1. It includes two vertically arranged heat exchange plates 12 and one horizontally arranged heat exchange plate 12, and a cooling chamber 11 is formed between the heat exchange plates 12 and the inner wall of the cabinet 1. The cooling chamber 11 covers the top and two side walls of the cabinet 1, realizing a semi-enclosure of the cabinet 1.

[0040] As a preferred embodiment of the present invention, the heat exchange plate 12 is relatively thin and has limited strength. The cooling chamber 11 between the heat exchange plate 12 and the cabinet 1 contains coolant, so it is necessary to prevent the heat exchange plate 12 from deforming and causing leakage of the coolant. A vertical rod is provided between the heat exchange plate 12 and the inner wall of the cabinet 1 to increase the strength of the heat exchange plate 12.

[0041] like Figure 1-2 As shown, in order to enhance the cooling capacity of the coolant. The circulation channel also includes a liquid collecting tank 13 arranged at the bottom of the cabinet 1 for collecting the coolant that has exchanged heat with the components. The liquid collecting tank 13 is provided with a flow pump and an upper liquid pipe 20 for conveying the coolant to the top of the cabinet 1. The upper liquid pipe 20 is arranged outside the cabinet 1. The coolant in the liquid collecting tank 13 has just been heat exchanged, so the temperature of the coolant inside it is the highest. When the coolant in the liquid collecting tank 13 is input into the upper liquid pipe 20, the coolant exchanges heat through the upper liquid pipe 20 located outside the cabinet 1, which can preliminarily reduce the temperature of the coolant.

[0042] like Figure 2 As shown, in order to improve the safety of the upper liquid pipe 20, a guardrail for surrounding the upper liquid pipe 20 is arranged on the side wall of the cabinet 1, and reinforcing plates are evenly arranged on the guardrail.

[0043] The cooling method of the semi-enclosed cooling device of the sealed electrical cabinet includes the following steps: Step 1: internal cooling, the coolant inside the liquid collecting box 13 is transported to the liquid outlet cavity 14 through the upper liquid pipe 20 by the flow pump on the liquid collecting box 13, so that the coolant in the circulating flow channel starts to flow, and the coolant at the top of the circulating flow channel flows downward to the cooling cavity 11, and exchanges heat with the inside of the cabinet 1 through the heat exchange plate 12, so as to cool the components installed inside the cabinet 1; Step 2: external cooling, after the coolant in the circulating flow channel starts to flow, the fan 4 is powered on, and at the same time the electric push rod 7 controls the baffle 8 to block the entrance of the cleaning chamber 9, and the external gas enters the heat exchange chamber 10, and the flowing coolant is cooled through the heat exchange tube 15; Step 3: Dust removal, control the electric push rod 7 to regularly drive the baffle 8 to seal the air inlet of the heat exchange chamber 10, so that the gas enters the cleaning chamber 9, and the gas flushes the filter element 17 through the cleaning pipe 18 and the nozzle 19. The nozzle 19, under the action of the driving part 21 and the adjusting screw 22, comprehensively flushes the filter element 17.

Claims

1. A semi-enclosed cooling device for a sealed electrical cabinet, comprising a cabinet for arranging components, a cabinet door for sealing the cabinet, and a circulation channel for the flow of a cooling liquid arranged inside the cabinet, characterized in that: A gas flow channel connected to the outside is arranged on the top of the cabinet, the gas flow channel includes a heat exchange chamber and a fan for supplying air to the heat exchange chamber, the circulation flow channel includes a heat exchange pipe passing through the heat exchange chamber, a cleaning chamber connected in parallel with the heat exchange chamber is arranged on the gas flow channel, and the cleaning chamber and the heat exchange chamber can be switched by a baffle driven by an electric push rod, the cleaning chamber is connected to a nozzle arranged in the gas flow channel through the cleaning pipe, the nozzle is driven to move horizontally by an adjustment component, and the output end of the nozzle is aligned with the filter element; The gas flow channel also includes an air inlet pipe and an air outlet pipe arranged on both sides of the top of the cabinet, the adjustment component includes an adjustment screw arranged in the air inlet pipe, the nozzle thread is arranged on the adjustment screw, and is driven by a driving member arranged on the air inlet pipe; The air inlet of the air inlet pipe is arranged downward, and a fence is arranged at the air inlet, and the filter element is arranged on the top of the fence; The two ends of the cleaning pipe are respectively provided with a hose section and a hard pipe section, and the hard pipe section is connected to the nozzle.

2. The semi-enclosed cooling device for a sealed electrical cabinet according to claim 1, characterized in that: The circulation channel further includes a liquid outlet cavity and a cooling cavity respectively arranged at the top and the bottom of the heat exchange chamber, and the liquid outlet cavity and the cooling cavity are communicated with each other through the heat exchange pipe.

3. The semi-enclosed cooling device for a sealed electrical cabinet as claimed in claim 2, characterized in that: The cooling chamber is divided by a heat exchange plate arranged in the cabinet, and the cooling chamber covers two opposite side walls and a top wall inside the cabinet.

4. The semi-enclosed cooling device for a sealed electrical cabinet as claimed in claim 3, characterized in that: A vertical rod is provided between the heat exchange plate and the inner wall of the cabinet to increase the strength of the heat exchange plate.

5. The semi-enclosed cooling device for a sealed electrical cabinet according to claim 1, characterized in that: The circulation channel also includes a liquid collecting box arranged at the bottom of the cabinet for collecting the coolant that has exchanged heat with the components. The liquid collecting box is provided with a flow pump and an upper liquid pipe for transporting the coolant to the top of the cabinet. The upper liquid pipe is arranged outside the cabinet.

6. The semi-enclosed cooling device for a sealed electrical cabinet as claimed in claim 5, characterized in that: A guardrail for surrounding the upper liquid pipe is arranged on the side wall of the cabinet, and reinforcing plates are evenly arranged on the guardrail.

7. The cooling method of the semi-enclosed cooling device of the sealed electrical cabinet according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Internal cooling: The flow pump on the liquid collecting box transports the coolant inside the liquid collecting box to the liquid outlet cavity through the upper liquid pipe, so that the coolant in the circulation channel starts to flow. The coolant at the top of the circulation channel flows downward into the cooling cavity, exchanges heat with the inside of the cabinet through the heat exchange plate, and cools the components installed inside the cabinet; Step 2: External cooling. After the coolant in the circulation channel starts to flow, the fan is powered on. At the same time, the electric push rod controls the baffle to block the entrance of the cleaning chamber. The external air enters the heat exchange chamber and cools the flowing coolant through the heat exchange tube. Step 3: Dust removal, control the electric push rod to regularly drive the baffle to seal the air inlet of the heat exchange chamber, so that the gas enters the cleaning chamber, and the gas flushes the filter element through the cleaning pipe and the nozzle. The nozzle, under the action of the drive part and the adjusting screw, comprehensively flushes the filter element.

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