Molecular sieve adsorption auxiliary dehumidification device for electrical equipment

Abstract

Relates to the field of electrical equipment cabinets, and discloses an electrical equipment molecular sieve adsorption auxiliary dehumidification device which comprises a rain cover arranged at the upper end of an electrical equipment cabinet, a temperature sensor arranged on a box door of the electrical equipment cabinet and a humidity sensor arranged on the box door, and further comprises a dehumidification device arranged on the electrical equipment cabinet, the dehumidification module is used for dehumidifying the interior of the electric appliance cabinet; the dehumidification device comprises a storage mechanism which is arranged on the inner bottom wall of the electric appliance cabinet and is used for storing a physical drying agent; the negative pressure element is adjustably arranged at an air outlet in the upper end of the electric appliance cabinet and is used for extracting moisture in the electric appliance cabinet; the negative pressure element is electrically connected with the temperature sensor and the humidity sensor through a plc control element, when the humidity is reduced to be lower than a set value, the dehumidification operation is stopped, and by means of the intelligent control mode, the dehumidification accuracy is improved, and energy is saved.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment cabinets, in particular to a molecular sieve adsorption auxiliary dehumidification device for electrical equipment. Background Art

[0002] During the operation of electrical equipment, moisture often accumulates inside the electrical cabinet due to factors such as environmental humidity, temperature changes, and possible small leaks inside the equipment. Moisture not only has an adverse effect on the insulation performance of electrical equipment, but may also cause corrosion of metal parts inside the equipment, thereby shortening the service life of the equipment and even causing safety hazards. Especially in some electrical equipment with high humidity requirements, such as high-voltage switchgear and transformers, the presence of moisture has become a major obstacle to the operation of the equipment.

[0003] Existing equipment has the following shortcomings: Traditional dehumidification methods for electrical equipment mainly include the use of desiccants, heating dehumidification, and ventilation. The use of desiccants requires regular replacement, which not only increases maintenance costs, but also makes the dehumidification effect difficult to sustain; heating dehumidification may cause the internal temperature of the equipment to be too high, which will have an adverse effect on other performance of the equipment; ventilation may introduce external dust and pollutants, causing secondary pollution to the operating environment of the equipment. These methods often have problems such as high energy consumption and complex operation.

[0004] Therefore, the present application now proposes a molecular sieve adsorption assisted dehumidification device for electrical equipment to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a molecular sieve adsorption assisted dehumidification device for electrical equipment to solve the problem that the above-mentioned desiccant needs to be replaced regularly, which not only increases the maintenance cost but also makes the dehumidification effect difficult to sustain; heating dehumidification may cause the internal temperature of the equipment to be too high, which has an adverse effect on other performance of the equipment; ventilation may introduce external dust and pollutants, causing secondary pollution to the operating environment of the equipment.

[0006] To achieve the above object, the present invention provides the following technical solution: a molecular sieve adsorption assisted dehumidification device for electrical equipment, comprising a rain shield provided at the upper end of an electrical cabinet, a temperature sensor provided on the cabinet door of the electrical cabinet, and a humidity sensor provided on the cabinet door, and further comprising:

[0007] A dehumidification device, arranged on the electrical cabinet, for dehumidifying the interior of the electrical cabinet;

[0008] The dehumidification device comprises:

[0009] A storage mechanism, arranged on the inner bottom wall of the electrical cabinet, for storing a physical desiccant;

[0010] A negative pressure element is adjustably arranged at the air outlet at the upper end of the electrical cabinet, and is used to extract moisture from the interior of the electrical cabinet;

[0011] The negative pressure element is electrically connected to the temperature sensor and the humidity sensor through a PLC control element.

[0012] Wherein, the storage mechanism comprises a placement box for placing the physical desiccant and a top cover adjustably arranged at the upper end of the placement box, and a through hole is opened at the upper end of the top cover.

[0013] Wherein, the upper end of the placement box and a side opening close to the box door are arranged.

[0014] Wherein, the negative pressure element includes an air outlet duct fixed at the upper end of the electrical cabinet, a fixing frame arranged on the inner side of the air outlet duct, a motor fixed on the fixing frame and a fan blade fixed at the power output end of the motor, and the fan blade is located below the fixing frame.

[0015] Among them, a sealing tube is arranged at the upper end of the air outlet pipe, a protective net is arranged inside the sealing tube, and a sealing plate for sealing the sealing tube is arranged at the position corresponding to the sealing tube at the lower end of the rain shield.

[0016] Among them, the dehumidification device also includes a power part fixed to the upper end of the electrical cabinet and connected to the rain shield, an air inlet pipe arranged at the lower end of the electrical cabinet, and a sealing mechanism arranged inside the electrical cabinet for sealing the air inlet pipe. The rain shield and the sealing mechanism are connected by a traction rope, and the traction rope is passed through the top of the electrical cabinet.

[0017] Among them, the sealing mechanism includes a mounting plate fixed on the inner wall of the electrical cabinet, a lifting rod passing through the mounting plate, a lifting plate fixed at the lower end of the lifting rod and a sealing block arranged at the lower end of the lifting plate for sealing the air inlet pipe, and the mounting plate is symmetrically arranged about the placement box.

[0018] Wherein, a portion of the lifting rod between the mounting plate and the lifting plate is sleeved with an elastic member, and the lifting plate is connected to the top cover via a connecting rod.

[0019] Wherein, a heating plate is arranged on the outer side of the air inlet pipe.

[0020] Wherein, a filter screen is arranged at the lower end of the air inlet pipe, and a brush for cleaning the filter screen is arranged at the lower end of the sealing block.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention uses a physical desiccant to perform dehumidification by utilizing its strong adsorption capacity for moisture. At the same time, with the use of a negative pressure element, moisture inside the electrical cabinet can be quickly extracted to form a negative pressure environment, further accelerating the discharge of moisture. This combination greatly improves the dehumidification efficiency and ensures that the electrical components inside the electrical cabinet are in a dry environment. The temperature sensor and the humidity sensor are connected to the PLC control element to achieve real-time monitoring and intelligent control of the temperature and humidity inside the electrical cabinet. When the humidity exceeds the set value, the PLC control element will automatically start the negative pressure element to perform dehumidification. When the humidity drops below the set value, the dehumidification operation is stopped. This intelligent control method not only improves the accuracy of dehumidification, but also achieves energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure in one embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the connection between the dehumidification device and the electrical cabinet in one embodiment of the present invention;

[0025] Figure 3 This is a schematic structural diagram of an electrical cabinet viewed from the front in one embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of a side section structure of an embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of a cross-section structure in one embodiment of the present invention;

[0028] Figure 6 It is a structural schematic diagram of a sealing mechanism in one embodiment of the present invention;

[0029] Figure 7 It is a structural schematic diagram of a dehumidification device in one embodiment of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the connection between the sealing mechanism and the storage mechanism in one embodiment of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of a sealing block opening an air inlet pipe in one embodiment of the present invention;

[0032] Fig.10 This is a schematic diagram of the structure in which a brush is connected to an air inlet pipe in one embodiment of the present invention;

[0033] Fig.11 Schematic diagram of the structure of a negative pressure element in one embodiment of the present invention.

[0034] In the figure: 1, electrical cabinet; 101, air outlet; 11, cabinet door; 111, temperature sensor; 112, humidity sensor; 12, rain cover; 2, electrical components; 21, mounting frame; 3, dehumidification device; 31, power component; 32, traction rope; 33, sealing mechanism; 331, mounting plate; 332, lifting rod; 333, lifting plate; 334, elastic member; 335, sealing block; 336, brush; 34, air inlet pipe; 341, filter screen; 35, heating plate; 36, storage mechanism; 361, storage box; 362, top cover; 36201, through hole; 363, connecting rod; 37, negative pressure element; 371, air outlet pipe; 372, fixing frame; 373, motor; 374, fan blade; 375, sealing pipe; 376, protective net; 377, sealing plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-11 The present invention provides a technical solution: a molecular sieve adsorption assisted dehumidification device for electrical equipment, comprising a rain shield 12 arranged at the upper end of an electrical cabinet 1, a temperature sensor 111 arranged on a door 11 of the electrical cabinet 1, and a humidity sensor 112 arranged on the door 11, a mounting frame 21 for mounting electrical components 2 is arranged inside the electrical cabinet 1, and further comprising:

[0037] A dehumidification device 3 is provided on the electrical cabinet 1 and is used to dehumidify the interior of the electrical cabinet 1;

[0038] The dehumidification device 3 comprises:

[0039] A storage mechanism 36, disposed on the inner bottom wall of the electrical cabinet 1, for storing a physical desiccant;

[0040] The negative pressure element 37 is adjustably arranged at the air outlet 101 at the upper end of the electrical cabinet 1, and is used to extract moisture from the interior of the electrical cabinet 1;

[0041] The negative pressure element 37 is electrically connected to the temperature sensor 111 and the humidity sensor 112 through a PLC control element.

[0042] It should be noted that, when working, the electrical cabinet 1 is embedded, and a reserved space for ventilation is opened at the wall position below the electrical cabinet 1. The rain cover 12 can block rainwater and reduce the flow of rainwater into the interior of the electrical cabinet 1. The temperature sensor 111 and the humidity sensor 112 can monitor the temperature and humidity inside the electrical cabinet 1 in real time. Physical desiccants such as silica gel desiccant and molecular sieve desiccant are placed inside the storage mechanism 36 to dry the interior of the electrical cabinet 1 by physically absorbing moisture. When the weather is relatively humid and exceeds the set value, the humidity sensor 112 will transmit the signal to the negative pressure element 37 through the PLC control element. The negative pressure element 37 runs to extract the moisture inside the electrical cabinet 1 from the air outlet 101. By placing a physical desiccant and utilizing its strong adsorption capacity for moisture for dehumidification, and at the same time, with the use of a negative pressure element 37, the moisture inside the electrical cabinet 1 can be quickly drawn out to form a negative pressure environment, further accelerating the discharge of moisture. This combination greatly improves the dehumidification efficiency and ensures that the electrical components 2 inside the electrical cabinet 1 are in a dry environment. The temperature sensor 111 and the humidity sensor 112 are connected to the PLC control element to achieve real-time monitoring and intelligent control of the temperature and humidity inside the electrical cabinet 1. When the humidity exceeds the set value, the PLC control element will automatically start the negative pressure element 37 for dehumidification. When the humidity drops below the set value, the dehumidification operation is stopped. This intelligent control method not only improves the accuracy of dehumidification, but also achieves energy saving.

[0043] In one embodiment, the storage mechanism 36 includes a placement box 361 for placing the physical desiccant and a top cover 362 adjustably arranged on the upper end of the placement box 361 , and a through hole 36201 is opened at the upper end of the top cover 362 .

[0044] This design, see Figure 4-9 The placement box 361 is used to store physical desiccant, such as molecular sieve, etc. Its design makes it easy to place and replace the desiccant. The adjustable setting of the top cover 362 can easily open or close the top cover 362 to regularly replace or replenish the desiccant, thereby ensuring the continuous and effective operation of the dehumidification device 3. The through hole 36201 opened on the top cover 362 allows air to flow freely inside the placement box 361, which is crucial to improving the dehumidification efficiency of the desiccant.

[0045] In one embodiment, the upper end of the placement box 361 and one side close to the box door 11 are opened.

[0046] This design, see Figure 8The design of the opening at the top of the placement box 361 allows the user to easily load or unload the desiccant (such as molecular sieve) without disassembling the entire storage mechanism 36, which greatly improves the convenience of operation. The side close to the box door 11 is also open, which further enhances the flexibility of operation. The physical desiccant can be placed in the placement box 361 from two different directions, which is convenient for replacing the physical desiccant in different spaces or operating conditions.

[0047] In one embodiment, the negative pressure element 37 includes an air outlet duct 371 fixed at the upper end of the electrical cabinet 1, a fixing frame 372 arranged on the inner side of the air outlet duct 371, a motor 373 fixed on the fixing frame 372, and a fan blade 374 fixed at the power output end of the motor 373, and the fan blade 374 is located below the fixing frame 372.

[0048] This design, see Fig.11 The motor 373 drives the fan blades 374 to rotate, generating negative pressure to effectively extract moisture from the electrical cabinet 1. The fan blades 374 are located below the fixing frame 372 to ensure that the air can be discharged smoothly through the air outlet pipe 371, thereby improving the dehumidification efficiency. The design of the air outlet pipe 371 allows the discharged moisture to be away from the electrical cabinet 1 to avoid moisture accumulation in the cabinet. By continuously extracting moisture, the negative pressure element 37 helps to keep the internal environment of the electrical cabinet 1 dry and prevent electrical equipment from malfunctioning or being damaged due to moisture. When the temperature sensor 111 detects that the temperature inside the electrical cabinet 1 is too high, the negative pressure element 37 can be opened through the PLC control element to ventilate and dissipate heat inside the electrical cabinet 1.

[0049] In one embodiment, a sealing tube 375 is provided at the upper end of the air outlet pipe 371, a protective net 376 is provided inside the sealing tube 375, and a sealing plate 377 for sealing the sealing tube 375 is provided at the position of the sealing tube 375 at the lower end of the rain shield 12.

[0050] This design, see Fig.11 The use of the sealing tube 375 and the sealing plate 377 effectively prevents the air exchange between the air outlet duct 371 and the external environment, and avoids the decrease in dehumidification efficiency due to air leakage. Good sealing helps to maintain the stability of the internal environment of the electrical cabinet 1 and reduce the impact of external factors on the internal equipment of the electrical cabinet 1. The setting of the protective net 376 effectively blocks foreign matter such as dust and insects from entering the air outlet duct 371, avoiding the normal operation of the fan blades 374 due to blockage by foreign matter, and also reduces potential damage to internal components such as the motor 373.

[0051] In one embodiment, the dehumidification device 3 also includes a power part 31 fixed to the upper end of the electrical cabinet 1 and connected to the rain shield 12, an air inlet pipe 34 arranged at the lower end of the electrical cabinet 1, and a sealing mechanism 33 arranged inside the electrical cabinet 1 for sealing the air inlet pipe 34. The rain shield 12 and the sealing mechanism 33 are connected by a traction rope 32, and the traction rope 32 is passed through the top of the electrical cabinet 1. The power part 31 includes but is not limited to a hydraulic cylinder, a linear guide rail, an electric push rod and a cylinder.

[0052] This design, see Figure 2-7 The power component 31 is electrically connected to the temperature sensor 111 and the humidity sensor 112 through the PLC control element. When the humidity inside the electrical cabinet 1 exceeds the set value, the PLC control element will automatically start the power component 31. The power component 31 drives the rain shield 12 to move up. The rain shield 12 drives the sealing mechanism 33 to move up through the traction rope 32, so that the air inlet duct 34 is opened, and then the rain shield 12 drives the sealing plate 377 to move up to open the air outlet duct 371. The air inlet duct 34 and the air outlet duct 371 are connected. At this time, the negative pressure element 37 can dehumidify the interior of the electrical cabinet 1. The setting of the sealing mechanism 33 ensures that the air inlet duct 34 can remain tightly sealed when air intake is not required, thereby preventing external moisture, dust, etc. from entering the interior of the electrical cabinet 1, thereby improving the protection level of the electrical cabinet 1.

[0053] In one embodiment, the sealing mechanism 33 includes a mounting plate 331 fixed on the inner wall of the electrical cabinet 1, a lifting rod 332 passing through the mounting plate 331, a lifting plate 333 fixed at the lower end of the lifting rod 332, and a sealing block 335 arranged at the lower end of the lifting plate 333 for sealing the air inlet duct 34. The mounting plate 331 is symmetrically arranged with respect to the placement box 361.

[0054] This design, see Figure 7 When the traction rope 32 moves up, it will drive the lifting rod 332 to move up, and then the lifting plate 333 will move up, driving the sealing block 335 to separate from the air inlet pipe 34, so that the upper ends of the electrical cabinet 1 are ventilated, thereby facilitating the discharge of moisture inside the electrical cabinet 1. The sealing block 335 can fit tightly with the opening of the air inlet pipe 34, effectively preventing external moisture, dust, etc. from entering the interior of the electrical cabinet 1, ensuring that the internal environment of the electrical cabinet 1 is dry and clean.

[0055] In one embodiment, the portion of the lifting rod 332 between the mounting plate 331 and the lifting plate 333 is sleeved with an elastic member 334 , the lifting plate 333 is connected to the top cover 362 via a connecting rod 363 , and the elastic member 334 is made of a damped spring or elastic pad.

[0056] This design, see Figure 4-8The introduction of the elastic member 334 allows the lifting rod 332 to automatically reset after being acted upon by an external force. When the rain shield 12 moves up and the lifting plate 333 is pulled up by the traction rope 32, the elastic member 334 is compressed. When the rain shield 12 moves down and the traction force disappears, the elastic force of the elastic member 334 pushes the lifting plate 333 and the sealing block 335 down, thereby realizing automatic sealing of the air inlet duct 34. When the humidity sensor 112 detects that the humidity inside the electrical cabinet 1 exceeds the set value, it indicates that the physical desiccant inside the placement box 361 has failed, and the dehumidification effect is poor and can no longer meet the use requirements, and needs to be replaced. At this time, the top cover 362 is opened during the upward movement of the lifting plate 333, and then the physical desiccant inside the placement box 361 can be taken out and replaced after the dehumidification of the interior of the electrical cabinet 1 is completed.

[0057] In one embodiment, a heating plate 35 is disposed on the outer side of the air inlet pipe 34 .

[0058] This design, see Fig.10 When the temperature sensor 111 detects that the humidity inside the electrical cabinet 1 is too high, the heating plate 35 can be turned on through the PLC control element. The heating plate 35 can effectively prevent the formation of condensed water by providing an appropriate amount of heat, thereby preventing water droplets from entering the electrical cabinet 1 and causing damage.

[0059] In one embodiment, a filter screen 341 is disposed at the lower end of the air inlet pipe 34 , and a brush 336 for cleaning the filter screen 341 is disposed at the lower end of the sealing block 335 , and the brush 336 extends into the interior of the filter screen 341 .

[0060] This design, see Figure 4 ,as well as Figure 7-10 The filter 341 can block dust, impurities, small particles and the like in the external air from entering the electrical cabinet 1, ensuring that the air entering the cabinet is relatively clean, reducing the pollution and damage to the electrical components 2. When the sealing block 335 moves up and down, the brush 336 will move accordingly and be inserted into the mesh of the filter 341, automatically cleaning the dust and impurities accumulated on the filter 341, avoiding clogging of the filter 341 and ensuring its continuous filtering effect. The automatic cleaning function greatly reduces the frequency of manual cleaning of the filter 341, reduces maintenance costs and workload, and improves the overall operating efficiency of the dehumidification device 3.

[0061] In addition, if there are descriptions involving "first", "second", etc. in the embodiments, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying the importance of the relative description or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

Claims

1. A molecular sieve adsorption assisted dehumidification device for electrical equipment, comprising a rain shield (12) arranged at the upper end of an electrical cabinet (1), a temperature sensor (111) arranged on a door (11) of the electrical cabinet (1), and a humidity sensor (112) arranged on the door (11), characterized in that: Also includes: A dehumidification device (3), arranged on the electrical cabinet (1), and used for dehumidifying the interior of the electrical cabinet (1); The dehumidification device (3) comprises: A storage mechanism (36) is arranged on the inner bottom wall of the electrical cabinet (1) and is used to store a physical desiccant; A negative pressure element (37) is adjustably arranged at the air outlet (101) at the upper end of the electrical cabinet (1) and is used to extract moisture from the interior of the electrical cabinet (1); The negative pressure element (37) is electrically connected to the temperature sensor (111) and the humidity sensor (112) via a PLC control element.

2. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 1, characterized in that: The storage mechanism (36) comprises a storage box (361) for storing the physical desiccant and a top cover (362) adjustably arranged at the upper end of the storage box (361), and a through hole (36201) is opened at the upper end of the top cover (362).

3. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 2, characterized in that: The upper end of the placement box (361) and a side close to the box door (11) are opened.

4. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 1, characterized in that: The negative pressure element (37) comprises an air outlet pipe (371) fixed to the upper end of the electrical cabinet (1), a fixing frame (372) arranged on the inner side of the air outlet pipe (371), a motor (373) fixed to the fixing frame (372), and a fan blade (374) fixed to the power output end of the motor (373), wherein the fan blade (374) is located below the fixing frame (372).

5. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 4, characterized in that: A sealing tube (375) is provided at the upper end of the air outlet pipe (371), a protective net (376) is provided inside the sealing tube (375), and a sealing plate (377) for sealing the sealing tube (375) is provided at the lower end of the rain shield (12) at a position corresponding to the sealing tube (375).

6. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 2, characterized in that: The dehumidification device (3) further comprises a power part (31) fixed to the upper end of the electrical cabinet (1) and connected to the rain shield (12), an air inlet pipe (34) arranged at the lower end of the electrical cabinet (1), and a sealing mechanism (33) arranged inside the electrical cabinet (1) for sealing the air inlet pipe (34), the rain shield (12) and the sealing mechanism (33) being connected via a traction rope (32), and the traction rope (32) being passed through the top of the electrical cabinet (1).

7. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 6, characterized in that: The sealing mechanism (33) comprises a mounting plate (331) fixed on the inner wall of the electrical cabinet (1), a lifting rod (332) passing through the mounting plate (331), a lifting plate (333) fixed at the lower end of the lifting rod (332), and a sealing block (335) arranged at the lower end of the lifting plate (333) for sealing the air inlet pipe (34), wherein the mounting plate (331) is symmetrically arranged with respect to the placement box (361).

8. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 7, characterized in that: An elastic member (334) is sleeved on the portion of the lifting rod (332) located between the mounting plate (331) and the lifting plate (333), and the lifting plate (333) is connected to the top cover (362) via a connecting rod (363).

9. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 6, characterized in that: A heating plate (35) is provided on the outer side of the air inlet pipe (34).

10. The molecular sieve adsorption assisted dehumidification device for electrical equipment according to claim 7, characterized in that: A filter screen (341) is disposed at the lower end of the air inlet pipe (34), and a brush (336) for cleaning the filter screen (341) is disposed at the lower end of the sealing block (335).

Images