Maintenance-free intelligent self-control cooling system

Abstract

The invention relates to the technical field of transformer cooling systems, and discloses a maintenance-free intelligent self-control cooling system which comprises a transformer box, a left box door is rotatably installed on the left side of the front face of the transformer box, a right box door is rotatably installed on the right side of the front face of the transformer box, and an air inlet mechanism is arranged outside the right box door. An exhaust mechanism is arranged on the left side of the transformer box, a control end is fixedly installed in the transformer box, and a control mechanism is arranged in the transformer box. According to the maintenance-free intelligent self-control cooling system, through the air inlet mechanism and the exhaust mechanism, in the using process, through the structure of lower end air inlet and upper end air outlet, the lower air inlet and high-position air outlet modes are achieved, hot air rises due to the heat island effect and is exhausted from the top, low-temperature air enters from the bottom, the temperature of the box body is effectively reduced, and the service life of the box body is prolonged. And meanwhile, the direct current motor is arranged for driving, so that the device has the advantages of low insulation requirement, high temperature resistance, long service life, high reliability and low price.

Description

Technical Field

[0001] The invention relates to the technical field of transformer cooling systems, and in particular to a maintenance-free intelligent automatic cooling system. Background Art

[0002] With the continuous development of the power system, the size and weight of box-type transformers have gradually decreased, achieving high efficiency, energy saving and low noise. Compared with other types of transformers, they have irreplaceable advantages in small and medium-sized distribution transformers. However, the inspection and maintenance of European box-type transformers under high temperature and high load operation in summer has become a difficult problem.

[0003] According to the investigation, the box transformer equipment has been operating in an outdoor high-temperature environment for a long time. The transformer body, attached high and low voltage switch cabinets and other equipment in the box will generate high temperature during operation. The cooling system of the box transformer has poor cooling effect, resulting in abnormally high temperature in the peak summer season. At the least, the operation and maintenance personnel cannot get close to check the equipment, and at the worst, the switch trips and the transformer burns out. The fan in the power room has poor cooling effect and the ventilation system is not designed reasonably, so the box transformer generally has poor cooling effect when it encounters high temperature and high load operation in summer. The cooling system structure and heat dissipation air path design of the original box transformer are unreasonable, the temperature detection point is inaccurate, and the quality of the ventilation fan used is not good. In addition, the thermostat detection design problem causes many fans to have a high damage rate after long-term operation. This causes users to trip frequently, so it is necessary to invent a maintenance-free intelligent automatic cooling system to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a maintenance-free intelligent self-controlled cooling system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a maintenance-free intelligent automatic cooling system, comprising a transformer box, a left box door is rotatably installed on the left side of the front side of the transformer box, a right box door is rotatably installed on the right side of the front side of the transformer box, an air intake mechanism is arranged outside the right box door, an exhaust mechanism is arranged on the left side of the transformer box, a control terminal is fixedly installed inside the transformer box, and a control mechanism is arranged inside the transformer box.

[0006] The control mechanism comprises a time relay, a temperature controller, an operation indicator light, a control switch and a test switch, and the time relay, the temperature controller, the operation indicator light, the control switch and the test switch are all arranged inside the transformer box.

[0007] Preferably, the air intake mechanism includes an air intake hood, which is fixedly mounted on the back of the right door near the bottom, a first motor is fixedly mounted on the front of the air intake hood, an air intake fan is fixedly mounted on the output end of the first motor, and an air intake net is fixedly mounted on the front of the right door.

[0008] Preferably, the exhaust mechanism includes an exhaust hood, which is fixedly mounted on the inner wall of the left side of the transformer box near the top end, a second motor is fixedly mounted on the left side of the exhaust hood, an exhaust fan is fixedly mounted on the output end of the second motor, and an exhaust net is fixedly mounted on the left side of the transformer box.

[0009] Preferably, two groups of the exhaust mechanism are provided, and the two groups of the exhaust mechanism are both arranged on the left side of the transformer box.

[0010] Preferably, the control end includes a temperature monitoring module, a temperature control module, a temperature setting module, a time control module, a time setting module and a motor control module, the signal between the temperature monitoring module and the temperature control module is installed, the signal between the temperature control module and the motor control module is installed, the signal between the temperature setting module and the temperature control module is installed, the signal between the time control module and the time setting module is installed, and the signal between the time control module and the motor control module is installed.

[0011] Preferably, the input end signal of the temperature monitoring module is installed with a temperature sensor, the signal between the temperature control module and the temperature controller is installed, the signal between the time control module and the time relay is installed, the signal between the motor control module and the first motor and the second motor is installed, and the input ends of the temperature setting module and the time setting module are respectively installed with a temperature setting button and a time setting button.

[0012] Preferably, the first motor and the second motor are low-voltage DC motors, and are both installed via a step-down rectifier circuit and a power supply.

[0013] Compared with the prior art, the present invention provides a maintenance-free intelligent automatic cooling system, which has the following beneficial effects:

[0014] 1. This maintenance-free intelligent self-controlled cooling system, through the air intake mechanism and exhaust mechanism, realizes the lower air intake and high-position air outlet through the structure of lower air intake and upper air outlet during use. The hot air rises due to the heat island effect and is discharged from the top, and the low-temperature air enters from the bottom, effectively reducing the temperature of the box. At the same time, it is driven by the set DC motor, which has the advantages of low insulation requirements, high temperature resistance, long life, high reliability and low price.

[0015] 2. The maintenance-free intelligent self-controlled cooling system, through the set control terminal and control mechanism, automatically determines and controls the cooling actions of various working conditions during use, automatically controls the cooling operation time, reaches the target temperature value and reaches the operation protection time value. In the two cases of high-temperature startup and low-temperature shutdown, the temperature difference can be set as needed, which can reduce the frequent startup of the fan and extend its service life. At the same time, an intermittent working mode is inserted in this control terminal. If the temperature control circuit malfunctions and causes the motor to work continuously, or if a high-temperature load fails to work without stopping, the intermittent circuit can work effectively to reduce the possibility of motor damage. The startup and shutdown time of the intermittent work can be set as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0017] Figure 1 This is a schematic diagram of the appearance structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention from the right side;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the exhaust mechanism of the present invention;

[0020] Figure 4 This is a schematic diagram of the control end system structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the temperature control circuit of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the timing control circuit of the present invention;

[0023] Figure 7 It is a schematic diagram of the cooling system structure of the present invention.

[0024] In the figure: 1. transformer box; 2. left box door; 3. right box door; 4. air intake mechanism; 41. air intake hood; 42. first motor; 43. air intake fan; 44. air intake net; 5. exhaust mechanism; 51. exhaust hood; 52. second motor; 53. exhaust fan; 54. exhaust net; 6. control end; 61. temperature monitoring module; 62. temperature control module; 63. temperature setting module; 64. time control module; 65. time setting module; 66. motor control module; 7. control mechanism; 71. time relay; 72. temperature controller; 73. operation indicator light; 74. control switch; 75. test switch. DETAILED DESCRIPTION

[0025] 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.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1-7 The present invention provides a technical solution: a maintenance-free intelligent automatic temperature reduction system, comprising a transformer box 1, a left box door 2 is rotatably installed on the left side of the front of the transformer box 1, a right box door 3 is rotatably installed on the right side of the front of the transformer box 1, an air intake mechanism 4 is arranged outside the right box door 3, an exhaust mechanism 5 is arranged on the left side of the transformer box 1, a control terminal 6 is fixedly installed inside the transformer box 1, and a control mechanism 7 is arranged inside the transformer box 1.

[0028] The control mechanism 7 includes a time relay 71, a temperature controller 72, an operation indicator light 73, a control switch 74, and a test switch 75. The time relay 71, the temperature controller 72, the operation indicator light 73, the control switch 74, and the test switch 75 are all arranged inside the transformer box 1.

[0029] Furthermore, the air intake mechanism 4 includes an air intake hood 41, which is fixedly mounted on the back of the right box door 3 near the bottom side, a first motor 42 is fixedly mounted on the front of the air intake hood 41, an air intake fan 43 is fixedly mounted on the output end of the first motor 42, and an air intake net 44 is fixedly mounted on the front of the right box door 3. By performing low-position air intake, external cold air is sucked into the interior of the transformer box 1.

[0030] Furthermore, the exhaust mechanism 5 includes an exhaust hood 51, which is fixedly installed on the inner wall of the left side of the transformer box 1 near the top end, a second motor 52 is fixedly installed on the left side of the exhaust hood 51, an exhaust fan 53 is fixedly installed on the output end of the second motor 52, and an exhaust net 54 is fixedly installed on the left side of the transformer box 1. By performing high-position exhaust, the high-temperature gas inside the transformer box 1 is discharged, and a heat island effect is formed with the air intake mechanism 4 to achieve rapid heat dissipation of the transformer box 1.

[0031] Furthermore, two groups of exhaust mechanisms 5 are provided, and both groups of exhaust mechanisms 5 are arranged on the left side of the transformer box 1 to improve the heat dissipation efficiency.

[0032] Furthermore, the control end 6 includes a temperature monitoring module 61, a temperature control module 62, a temperature setting module 63, a time control module 64, a time setting module 65 and a motor control module 66. The signal between the temperature monitoring module 61 and the temperature control module 62 is installed, the signal between the temperature control module 62 and the motor control module 66 is installed, the signal between the temperature setting module 63 and the temperature control module 62 is installed, the signal between the time control module 64 and the time setting module 65 is installed, and the signal between the time control module 64 and the motor control module 66 is installed. The automatic start-up, heat dissipation and intermittent stop of the transformer box 1 are realized through the control end 6.

[0033] Furthermore, the input signal of the temperature monitoring module 61 is installed with a temperature sensor, the signal is installed between the temperature control module 62 and the temperature controller 72, the signal is installed between the time control module 64 and the time relay 71, the signal is installed between the motor control module 66 and the first motor 42 and the second motor 52, and the input signals of the temperature setting module 63 and the time setting module 65 are respectively installed with a temperature setting button and a time setting button, so as to facilitate the control of the device.

[0034] Furthermore, the first motor 42 and the second motor 52 are low-voltage DC motors, and are both installed through a step-down rectifier circuit and a power supply, so as to increase the service life of the motors and reduce the cost of use.

[0035] In actual operation, when the device is used, the temperature setting module 63 is used to set the on / off temperature and the start / stop temperature of the first motor 42 and the second motor 52, the time setting module 65 is used to set the working time and the stop interval time of the first motor 42 and the second motor 52, and the temperature sensor is used to monitor the temperature inside the transformer box 1. When the temperature is lower than the set stop value, the first motor 42 and the second motor 52 stop working; when the temperature is higher than the set start value, the temperature monitoring module 61 sends a temperature signal to the temperature control module 62. When the temperature control module 62 determines that the temperature inside the transformer box 1 is higher than the set value, the temperature control module 62 sends a signal to the motor control module 66, so that the motor control module 66 starts the first motor 42 and the second motor 52, and at the same time, the time relay 71 starts the working time of the timing motor, so that the first motor 42 drives the intake fan 43 to rotate, so that the transformer box 1 takes in air from the bottom, and at the same time, the second motor 52 drives the exhaust fan 53 to rotate, so that the exhaust fan 53 discharges the hot air in the transformer box 1.

[0036] During the heat dissipation and cooling process, the temperature sensor connected to the temperature detection module 61 monitors the internal temperature of the transformer box 1 in real time. When the temperature drops to the set stop value, the temperature control module 62 sends a signal to the motor control module 66, so that the motor control module 66 controls the first motor 42 and the second motor 52 to stop, and the heat dissipation stops at this time; if the temperature continues to fail to reach the set stop temperature, and the running time of the first motor 42 and the second motor 52 reaches the set intermittent working time, the time control module 64 controls the time relay 71 and sends a signal to the motor control module 66. A signal is sent to make the first motor 42 and the second motor 52 enter the shutdown operation for the set intermittent time; if after the intermittent time, the temperature inside the transformer box 1 drops below the set shutdown temperature, the first motor 42 and the second motor 52 stop working, and then restart again until the temperature rises to the set starting temperature; if after the intermittent time, the temperature inside the transformer box 1 is still higher than the set starting temperature, the first motor 42 and the second motor 52 continue to start and cool down until the temperature inside the transformer box 1 drops to the set value, and then the first motor 42 and the second motor 52 stop.

[0037] It should be noted that, after continuous experiments by the inventor, in actual on-site use, the motor working time is set to 90 minutes, and forced shutdown for 15 minutes to give the motor a rest will actually more effectively reduce the wear of the motor bearings and reduce the heating level of the motor coil, thereby increasing its service life.

[0038] in addition, Figure 2 The settings of the control terminal 6 and the control mechanism 7 are for reference only. In practice, the installation settings and positions of the control terminal 6 and the control mechanism 7 can be changed according to needs.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A maintenance-free intelligent automatic temperature reduction system, comprising a transformer box (1), characterized in that: A left box door (2) is rotatably mounted on the left side of the front face of the transformer box (1), a right box door (3) is rotatably mounted on the right side of the front face of the transformer box (1), an air intake mechanism (4) is arranged outside the right box door (3), an exhaust mechanism (5) is arranged on the left side of the transformer box (1), a control terminal (6) is fixedly mounted inside the transformer box (1), and a control mechanism (7) is arranged inside the transformer box (1); The control mechanism (7) comprises a time relay (71), a temperature controller (72), an operation indicator light (73), a control switch (74), and a test switch (75); the time relay (71), the temperature controller (72), the operation indicator light (73), the control switch (74), and the test switch (75) are all arranged inside the transformer box (1).

2. A maintenance-free intelligent automatic cooling system according to claim 1, characterized in that: The air intake mechanism (4) comprises an air intake hood (41), the air intake hood (41) being fixedly mounted on the back of the right box door (3) near the bottom, a first motor (42) being fixedly mounted on the front of the air intake hood (41), an air intake fan (43) being fixedly mounted on the output end of the first motor (42), and an air intake net (44) being fixedly mounted on the front of the right box door (3).

3. A maintenance-free intelligent automatic cooling system according to claim 2, characterized in that: The exhaust mechanism (5) comprises an exhaust hood (51), the exhaust hood (51) being fixedly mounted on the inner wall of the left side of the transformer box (1) near the top end, a second motor (52) being fixedly mounted on the left side of the exhaust hood (51), an exhaust fan (53) being fixedly mounted on the output end of the second motor (52), and an exhaust net (54) being fixedly mounted on the left side of the transformer box (1).

4. A maintenance-free intelligent automatic cooling system according to claim 3, characterized in that: Two groups of the exhaust mechanism (5) are provided, and both groups of the exhaust mechanism (5) are arranged on the left side of the transformer box (1).

5. A maintenance-free intelligent automatic cooling system according to claim 4, characterized in that: The control end (6) comprises a temperature monitoring module (61), a temperature control module (62), a temperature setting module (63), a time control module (64), a time setting module (65) and a motor control module (66); a signal connection is established between the temperature monitoring module (61) and the temperature control module (62); a signal connection is established between the temperature control module (62) and the motor control module (66); a signal connection is established between the temperature setting module (63) and the temperature control module (62); a signal connection is established between the time control module (64) and the time setting module (65); and a signal connection is established between the time control module (64) and the motor control module (66).

6. A maintenance-free intelligent automatic cooling system according to claim 5, characterized in that: The input end signal of the temperature monitoring module (61) is equipped with a temperature sensor, the signal between the temperature control module (62) and the temperature controller (72) is equipped, the signal between the time control module (64) and the time relay (71) is equipped, the signal between the motor control module (66) and the first motor (42) and the second motor (52) is equipped, and the input ends of the temperature setting module (63) and the time setting module (65) are equipped with a temperature setting button and a time setting button respectively.

7. A maintenance-free intelligent automatic cooling system according to claim 6, characterized in that: The first motor (42) and the second motor (52) are low-voltage DC motors, and are both installed via a step-down rectifier circuit and a power supply.

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