Cooling mechanism for PLC control cabinet of high-temperature machine room

Abstract

The utility model relates to a cooling mechanism for a PLC control cabinet of a high-temperature machine room. The PLC control cabinet solves the problem that a PLC control cabinet in a high-temperature machine room in the prior art is poor in cooling effect. The system comprises a PLC control cabinet arranged in a high-temperature machine room, the upper end of the PLC control cabinet is connected with an open type air inlet channel, one end of the open type air inlet channel is connected with a low-temperature machine room located on the partition wall of the high-temperature machine room, an axial flow fan is arranged in the open type air inlet channel, and starting and stopping of the axial flow fan are controlled through a temperature control assembly arranged in the PLC control cabinet. The utility model has the advantages that the problem of high temperature of the PLC control cabinet in the high-temperature machine room can be solved, the PLC control cabinet can be cooled by using natural cooling capacity, and the situation that heat exchange in the PLC control cabinet is weakened when the temperature of the normal-temperature machine room rises or the pressure difference between the two sides is reduced can be avoided, so that the temperature of the PLC control cabinet cannot be greatly increased, and the service life of the PLC control cabinet is prolonged. The cooling effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical temperature control, in particular to a cooling mechanism for a PLC control cabinet in a high-temperature machine room. Background Art

[0002] Most pharmaceutical manufacturing companies have large equipment rooms to meet the process requirements, such as steam cooling and pressure reduction equipment rooms, boiler equipment rooms, chiller high-pressure distribution rooms, and steam heat exchange rooms. The operation of the equipment will generate a lot of heat, and the rooms are in a high temperature state all year round. At present, most process equipment needs to be equipped with PLC control cabinets to control the operation status of the equipment, and the PLC control cabinets have high requirements for the ambient temperature. Most PLC control cabinets operate in a high temperature environment, which easily causes the number of PLC control cabinet failures to grow exponentially. Failure of the PLC control cabinet will affect the stability of the operation of the plant's process equipment and cause greater production risks.

[0003] Traditional PLC control cabinets use fans integrated in the cabinets to cool down and dissipate heat. Since the temperature in the high-temperature machine room is high and the PLC control cabinet does not produce volatile substances to undergo phase change to take away heat during operation, the fan can only play the role of air circulation. It is difficult to effectively cool down the inside of the PLC control cabinet when the ambient temperature is high, so the cooling effect is not ideal. Summary of the invention

[0004] The purpose of the utility model is to provide a cooling mechanism for a PLC control cabinet in a high-temperature machine room in view of the above problems.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a cooling mechanism for a PLC control cabinet in a high-temperature machine room, comprising a PLC control cabinet arranged in the high-temperature machine room, an open air inlet channel connected to the upper end of the PLC control cabinet, and one end of the open air inlet channel is connected to a low-temperature machine room located next to the high-temperature machine room, an axial flow fan is arranged in the open air inlet channel, and the axial flow fan is started and stopped by a temperature control component arranged in the PLC control cabinet.

[0006] In the above-mentioned high-temperature machine room PLC control cabinet cooling mechanism, the high-temperature machine room and the low-temperature machine room are separated by a wall, an open air inlet channel is arranged in the wall, and the above-mentioned axial flow fan is arranged in the open air inlet channel and located at the wall.

[0007] In the above-mentioned cooling mechanism for a PLC control cabinet in a high-temperature machine room, one end of the open air inlet passage in the low-temperature machine room is an air inlet, and a nylon filter and shutters are arranged at the air inlet.

[0008] In the above-mentioned high-temperature machine room PLC control cabinet cooling mechanism, the open air inlet channel is located at one end of the high-temperature machine room and penetrates into the PLC control cabinet and the end is an air outlet, and the air outlet faces the PLC heating element in the PLC control cabinet.

[0009] In the above-mentioned cooling mechanism of the PLC control cabinet in a high-temperature machine room, the temperature control component includes a temperature sensor, the temperature sensor is arranged on the upper side inside the PLC control cabinet, and the temperature sensor is connected to the main control module.

[0010] In the above-mentioned cooling mechanism of the PLC control cabinet in a high-temperature machine room, the axial flow fan is turned on and off by a fan control switch, and the fan control switch is connected to the main control module.

[0011] In the above-mentioned cooling mechanism of the PLC control cabinet in a high-temperature machine room, the axial flow fan is powered by the PLC control cabinet.

[0012] In the above-mentioned cooling mechanism for a PLC control cabinet in a high-temperature machine room, an exhaust system is provided in the high-temperature machine room, and the air pressure range in the high-temperature machine room is -50 to -80 Pa.

[0013] In the above-mentioned cooling mechanism for a PLC control cabinet in a high-temperature machine room, the air pressure range in the low-temperature machine room is greater than that in the high-temperature machine room.

[0014] In the above-mentioned cooling mechanism for a PLC control cabinet in a high-temperature machine room, the axial flow fan is a small axial flow fan and is usually in a closed state.

[0015] Compared with the existing technology, the advantages of the utility model are: it can solve the high temperature problem of the PLC control cabinet in the high temperature machine room, and can use the natural cold to cool the PLC control cabinet, and the energy consumption generated will not be too high, which is a green and energy-saving cooling method. In addition, the use of temperature sensors can ensure that when the temperature of the normal temperature machine room rises, or when the pressure difference on both sides decreases, the heat exchange in the PLC control cabinet is weakened, so as to ensure that the temperature of the PLC control cabinet will not rise significantly, and the cooling effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the arrangement position of the temperature sensor in the utility model;

[0018] Figure 3 It is a principle block diagram of the utility model;

[0019] In the figure: high temperature machine room 1, PLC control cabinet 2, PLC heating element 21, open air inlet channel 3, air inlet 31, air outlet 32, low temperature machine room 4, axial flow fan 5, temperature control component 6, temperature sensor 61, main control module 62, fan control switch 63, wall 7. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figure 1-3 As shown, a cooling mechanism for a PLC control cabinet in a high-temperature machine room includes a PLC control cabinet 2 arranged in a high-temperature machine room 1, an upper end of the PLC control cabinet 2 is connected to an open air inlet channel 3, and one end of the open air inlet channel 3 is connected to a low-temperature machine room 4 located next to the high-temperature machine room 1, an axial flow fan 5 is arranged in the open air inlet channel 3, and the axial flow fan 5 is started and stopped by a temperature control component 6 arranged in the PLC control cabinet 2.

[0022] The high temperature machine room 1 and the low temperature machine room 4 are separated by a wall 7 , an open air inlet passage 3 is passed through the wall 7 , and the axial flow fan 5 is arranged in the open air inlet passage 3 and located at the wall 7 .

[0023] One end of the open air inlet passage 3 located in the low-temperature machine room 4 is an air inlet 31 , and a nylon filter and shutters are arranged at the air inlet 31 .

[0024] The air entering the PLC control cabinet 2 needs to be filtered through a nylon mesh filter. Since most of the power comes from the air flow generated by the pressure difference, it is a green and pollution-free power source, and at the same time the energy-saving effect is also excellent.

[0025] The open air inlet channel 3 is located at one end of the high temperature machine room 1 and penetrates the PLC control cabinet 2 , and the end thereof is an air outlet 32 ​​, and the air outlet 32 ​​faces the PLC heating element 21 in the PLC control cabinet 2 .

[0026] The air outlet 32 ​​arranged toward the PLC heating element 21 can quickly cool down the PLC control cabinet 2 .

[0027] The temperature control component 6 includes a temperature sensor 61 . The temperature sensor 61 is disposed on the upper side of the PLC control cabinet 2 , and the temperature sensor 61 is connected to the main control module 62 .

[0028] The axial flow fan 5 is turned on and off by a fan control switch 63 , and the fan control switch 63 is connected to the main control module 62 .

[0029] When the temperature sensor 61 detects that the temperature inside the PLC control cabinet 2 has an increasing trend, the axial flow fan 5 is turned on to force an increase in the ventilation frequency to ensure that when the temperature in the low-temperature machine room 4 rises or the pressure difference on both sides of the wall 7 decreases, the heat exchange in the PLC control cabinet 2 is weakened, so as to ensure that the temperature in the PLC control cabinet 2 does not rise significantly.

[0030] The axial flow fan 5 is powered by the PLC control cabinet 2. The PLC control cabinet 2 is provided with a power supply to power the axial flow fan 5.

[0031] An exhaust system is provided in the high temperature machine room 1 , and the air pressure range in the high temperature machine room 1 is -50 to -80 Pa, and the air pressure range in the low temperature machine room 4 is greater than that in the high temperature machine room 1 .

[0032] The exhaust system is usually in the open state to create a negative pressure environment in the high-temperature machine room 1, so as to allow the inflow of low-temperature air. The low-temperature air enters the PLC control cabinet 2 through the open air inlet channel 3 for cooling.

[0033] The negative pressure conditions in the low-temperature machine room 4 and the high-temperature machine room 1 are utilized to create conditions for low-temperature air flow to cool down the PLC control cabinet 2.

[0034] The axial flow fan 5 is a small axial flow fan 5 and is usually in a closed state.

[0035] When selecting the axial flow fan 5 , the appropriate air volume and air pressure are selected according to the size of the PLC control cabinet 2 and the length of the open air inlet channel 3 .

[0036] In summary, the principle of this embodiment is: by adding an open air inlet channel 3 to the traditional PLC control cabinet 2 to connect to the low-temperature machine room 4, the temperature difference between the high and low temperature areas and the negative pressure in the high-temperature machine room 1 are used to create the conditions for low-temperature air flow, so as to cool down the PLC control cabinet 2. When the temperature sensor 61 detects that the temperature has an upward trend, the axial flow fan 5 is turned on to force the ventilation frequency to increase, so as to ensure that when the temperature of the low-temperature machine room 4 rises, or when the pressure difference between the two sides decreases, the heat exchange in the PLC control cabinet 2 is weakened, so as to ensure that the temperature of the PLC control cabinet 2 will not rise significantly.

[0037] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0038] Although this article uses more terms such as high temperature machine room 1, PLC control cabinet 2, PLC heating element 21, open air inlet channel 3, air inlet 31, air outlet 32, low temperature machine room 4, axial flow fan 5, temperature control component 6, temperature sensor 61, main control module 62, fan control switch 63, wall 7, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A cooling mechanism for a PLC control cabinet in a high-temperature machine room, comprising a PLC control cabinet (2) arranged in a high-temperature machine room (1), characterized in that: The upper end of the PLC control cabinet (2) is connected to an open air inlet passage (3), and one end of the open air inlet passage (3) is connected to a low-temperature machine room (4) located next to the high-temperature machine room (1). An axial flow fan (5) is arranged in the open air inlet passage (3), and the axial flow fan (5) is started and stopped by a temperature control component (6) arranged in the PLC control cabinet (2).

2. A high temperature machine room PLC control cabinet cooling mechanism according to claim 1, characterized in that: The high-temperature machine room (1) and the low-temperature machine room (4) are separated by a wall (7), the open air inlet passage (3) is penetrated through the wall (7), and the axial flow fan (5) is arranged in the open air inlet passage (3) and located on the wall (7).

3. A high temperature machine room PLC control cabinet cooling mechanism according to claim 1, characterized in that: One end of the open air inlet passage (3) located in the low-temperature machine room (4) is an air inlet (31), and a nylon filter and shutters are arranged at the air inlet (31).

4. A high temperature machine room PLC control cabinet cooling mechanism according to claim 1, characterized in that: The open air inlet channel (3) is located at one end of the high-temperature machine room (1) and is arranged inside the PLC control cabinet (2), and the end thereof is an air outlet (32), and the air outlet (32) faces the PLC heating element (21) inside the PLC control cabinet (2).

5. A high temperature machine room PLC control cabinet cooling mechanism according to claim 1, characterized in that: The temperature control component (6) comprises a temperature sensor (61), and the temperature sensor (61) is arranged on the upper side of the interior of the PLC control cabinet (2), and the temperature sensor (61) is connected to the main control module (62).

6. A high temperature machine room PLC control cabinet cooling mechanism according to claim 5, characterized in that: The axial flow fan (5) is turned on and off by a fan control switch (63), and the fan control switch (63) is connected to the main control module (62).

7. A high temperature machine room PLC control cabinet cooling mechanism according to claim 6, characterized in that: The axial flow fan (5) is powered by a PLC control cabinet (2).

8. A cooling mechanism for a PLC control cabinet in a high-temperature machine room according to claim 1, characterized in that: The high temperature machine room (1) is provided with an exhaust system, and the air pressure in the high temperature machine room (1) ranges from -50 to -80 Pa.

9. A cooling mechanism for a PLC control cabinet in a high-temperature machine room according to claim 8, characterized in that: The air pressure range in the low-temperature machine room (4) is greater than that in the high-temperature machine room (1).

10. A cooling mechanism for a PLC control cabinet in a high temperature machine room according to claim 1, characterized in that: The axial flow fan (5) is a small axial flow fan (5) and is usually in a closed state.

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