Constant temperature control cabinet and constant temperature control method for control cabinet

Abstract

The application relates to the technical field of control cabinets, and discloses a constant-temperature control cabinet and a constant-temperature control method of a control cabinet. The constant-temperature control cabinet comprises a control cabinet, a cabinet body, a plurality of air outlets arranged on the cabinet body, a gas supply unit for supplying gas into the cabinet body, a gas equalizing unit arranged in the cabinet body and connected with the gas supply unit, a detection unit arranged in the cabinet body and used for detecting the temperature in the cabinet body, and a control unit connected with the detection unit and used for transmitting a temperature signal to the control unit; the gas supply unit is connected with the control unit, and the control unit controls the gas supply rate of the gas supply unit based on the temperature signal. The constant-temperature control cabinet can realize real-time monitoring and regulation of the temperature in the control cabinet, and can make the temperature regions of all places in the control cabinet consistent, so that heat accumulation is avoided.

Description

Technical Field

[0001] This invention relates to the field of control cabinet technology, specifically to a constant temperature control cabinet. Furthermore, it also relates to a method for controlling the constant temperature of a control cabinet. Background Technology

[0002] In automated industrial equipment, the PLC control cabinet is a core component, containing control devices for controlling the operation of the entire equipment.

[0003] During the operation of the control device, a large amount of heat is generated. The temperature control system of the existing PLC control cabinet generally adopts a single fan start / stop or a simple air-cooled auxiliary heat dissipation method, which has significant technical defects: On the one hand, the temperature control accuracy is poor, and it is impossible to dynamically adjust the heat dissipation intensity according to the actual temperature inside the cabinet. It is easy to cause temperature overshoot and adjustment lag, resulting in overheating and aging of electrical components inside the cabinet; on the other hand, the heat dissipation airflow distribution is uneven. Traditional auxiliary cooling media are mostly single-point direct blowing or irregular diffusion, forming local airflow dead zones inside the cabinet. High temperature areas cannot be effectively covered, resulting in local temperature accumulation problems, causing irreversible damage to precision electrical components and significantly reducing the overall service life of the control cabinet.

[0004] Therefore, a new thermostatic control cabinet needs to be designed to overcome or mitigate the aforementioned shortcomings of the existing technology. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a constant temperature control cabinet that can realize real-time monitoring and regulation of the temperature inside the control cabinet, and can make the temperature area in all parts of the control cabinet consistent, so that heat accumulation is not likely to occur.

[0006] The technical problem to be solved by the second aspect of the present invention is to provide a constant temperature control method for a control cabinet, which can realize real-time monitoring and regulation of the temperature inside the control cabinet, and can make the temperature area in all parts of the control cabinet consistent, so that heat accumulation is not likely to occur.

[0007] To achieve the above objectives, a first aspect of the present invention provides a constant temperature control cabinet, comprising: A control cabinet includes a cabinet body, wherein the cabinet body is provided with multiple air outlets; An air supply unit is used to supply air into the cabinet. An equalization unit is located inside the cabinet and is connected to the gas supply unit; A detection unit, located inside the cabinet, is used to detect the temperature inside the cabinet; The control unit includes a detection unit connected to the control unit to transmit a temperature signal to the control unit, and an air supply unit connected to the control unit. The control unit controls the air supply rate of the air supply unit to supply air into the cabinet based on the transmitted temperature signal.

[0008] Furthermore, the gas supply unit includes a gas supply pipeline connected to a gas source, and the gas supply pipeline is equipped with an on / off valve.

[0009] Furthermore, the gas supply unit also includes a filter pressure reducing valve disposed on the gas supply pipeline.

[0010] Furthermore, the air equalization unit includes an air equalization structure, the air equalization structure is provided with a plurality of air equalization holes, the air equalization structure is provided with a plurality of air equalization structures, and the plurality of air equalization structures are arranged along the height direction of the cabinet. The gas equalization unit also includes a connecting pipe, and the gas equalization structure is connected in parallel to the gas supply pipe via the connecting pipe.

[0011] Furthermore, the air distribution structure is an air distribution plate, and the upper surface of the air distribution plate is provided with air distribution holes. The air distribution plate divides the cabinet body into multiple chambers.

[0012] Furthermore, the connecting pipe is equipped with a solenoid valve, and each of the gas equalization plates has a corresponding solenoid valve, so as to control the gas supply rate of the gas supply unit to each of the gas equalization plates via the solenoid valve.

[0013] Furthermore, each of the chambers has at least one pair of air outlets disposed opposite each other on the side wall of the cabinet, and the air outlets are located at the upper part of the chamber.

[0014] Furthermore, a fan is provided in the air outlet to extract gas from the cabinet, and the total rate at which the fan extracts gas from the cabinet is lower than the rate at which the gas supply unit supplies gas to the cabinet.

[0015] Furthermore, the detection unit includes a temperature sensor, and each of the chambers is equipped with the temperature sensor. The temperature sensor is connected to the control unit to transmit a temperature signal to the control unit. The control unit controls the opening degree of the corresponding solenoid valve based on the temperature signal transmitted by each temperature sensor. The fan is connected to the control unit, and the control unit controls the rate at which the fan draws gas from the cabinet based on the temperature signal transmitted by the temperature sensor.

[0016] A second aspect of the present invention provides a method for constant temperature control of a control cabinet, utilizing the aforementioned line of sight of the constant temperature control cabinet, comprising the following steps: The gas supply unit is activated to supply gas into the cabinet. The detection unit is activated to monitor the temperature inside the cabinet in real time. The control unit responds to the temperature information fed back by the detection unit by controlling the rate at which the air supply unit supplies air into the cabinet until the temperature information fed back by the detection unit is within a preset range.

[0017] Furthermore, in response to the temperature information fed back by the detection unit being within the first warning range, the control unit controls the air supply unit to supply air to the cabinet at a first air supply rate range; In response to the temperature information fed back by the detection unit being within the second warning range, the control unit controls the air supply unit to supply air to the cabinet at a second air supply rate range. In response to the temperature information fed back by the detection unit being within a safe range, the control unit controls the gas supply unit to stop supplying gas to the cabinet.

[0018] As can be seen from the above technical solution of the present invention, the constant temperature control cabinet provided by the first aspect of the present invention supplies air into the cabinet through the air supply unit. The air supplied into the cabinet will overflow from the air outlet, thereby carrying away the heat inside the cabinet. During this process, the detection unit will detect the temperature inside the cabinet in real time and transmit the temperature signal to the control unit. The control unit can then adjust the air supply rate of the air supply unit into the cabinet in real time according to the real-time feedback temperature signal, thereby controlling the air intake to achieve the purpose of controlling the temperature inside the cabinet, so that the temperature inside the cabinet is maintained within the set range. After the air enters the cabinet, it will be evenly dispersed in the cabinet by the air equalization unit, thereby providing good heat dissipation for the electronic components inside the cabinet and preventing local heat accumulation, thus extending the overall service life of the control cabinet.

[0019] The control cabinet constant temperature control method provided in the second aspect of the present invention is implemented using the above-mentioned constant temperature control cabinet, and therefore also has all the beneficial effects of the above-mentioned constant temperature control cabinet.

[0020] Other features and more prominent advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the constant temperature control cabinet of the present invention.

[0022] Explanation of reference numerals in the attached figures 1. Control cabinet; 2. Air supply unit; 21. On / off valve; 22. Filter pressure reducing valve; 3. Air distribution unit; 31. Air distribution structure; 311. Air distribution port; 32. Connecting pipe; 33. Solenoid valve; 4. Detection unit; 5. Control unit; 6. Fan. Detailed Implementation

[0023] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setup," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] It should be understood that, for ease of description and simplification, the terms "up," "down," "left," and "right" refer to the vertical directions perpendicular to the temperature control cabinet in its operating state. These terms are based on the orientation or positional relationships shown in the accompanying drawings and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention.

[0026] The first aspect of this invention provides a constant temperature control cabinet, see [link to relevant documentation]. Figure 1 The system includes a control cabinet 1, which includes a cabinet body with multiple air outlets; an air supply unit 2 for supplying air into the cabinet body; an air equalization unit 3 located inside the cabinet body and connected to the air supply unit 2; a detection unit 4 located inside the cabinet body for detecting the temperature inside the cabinet body; and a control unit 5, which is connected to the detection unit 4 to transmit a temperature signal to the control unit 5. The air supply unit 2 is connected to the control unit 5, and the control unit 5 controls the air supply rate of the air supply unit 2 to the cabinet body based on the transmitted temperature signal.

[0027] Based on the above-mentioned basic technical solution, the constant temperature control cabinet of the present invention supplies air to the cabinet through the air supply unit 2. The air supplied into the cabinet will overflow from the air outlet, thereby carrying away the heat inside the cabinet. During this process, the detection unit 4 will detect the temperature inside the cabinet in real time and transmit the temperature signal to the control unit 5. The control unit 5 can adjust the air supply rate of the air supply unit 2 to the cabinet in real time according to the real-time feedback temperature signal, thereby controlling the air intake to achieve the purpose of controlling the temperature inside the cabinet, so that the temperature inside the cabinet is maintained within the set range. After the air enters the cabinet, it will be evenly dispersed in the cabinet by the air equalization unit 3, thereby providing good heat dissipation for the electronic components inside the cabinet and preventing local heat accumulation, thus extending the overall service life of the control cabinet 1.

[0028] Furthermore, the gas supply unit 2 includes a gas supply pipeline connected to a gas source. The gas supply pipeline is equipped with an on / off valve 21, which can be a manually operated ball valve to serve as the main control on / off valve 21 of the gas supply unit 2. The gas source can be an air compressor such as an air pump to provide high-pressure gas. A cooling device can also be installed between the gas source and the on / off valve 21. This cooling device uses existing technology to cool the gas in the gas supply pipeline, thereby making the temperature of the gas entering the cabinet lower and thus achieving faster cooling of the cabinet.

[0029] Furthermore, the gas supply unit 2 also includes a filter pressure reducing valve 22 installed on the gas supply pipeline. The filter pressure reducing valve 22 can filter impurities in the gas, especially dust particles. This effectively ensures that the electronic components inside the cabinet are not affected by dust particles, thereby ensuring that the electronic components inside the cabinet are not easily damaged and have a sufficient service life.

[0030] Furthermore, the air distribution unit 3 includes an air distribution structure 31, which has multiple air distribution holes 311. These holes can be evenly distributed on the air distribution structure 31, or they can be specifically arranged according to the heat generation of the electronic components. Generally, the higher the heat generation of the electronic component, the higher the density of the air distribution holes 311 in the area of ​​the air distribution structure 31, and vice versa. This allows for more efficient cooling of the high-heat-generating electronic components, resulting in a more uniform temperature throughout the cabinet and preventing localized heat accumulation. Multiple air distribution structures 31 are arranged along the height of the cabinet to improve air distribution along the height, further ensuring a more uniform temperature throughout the cabinet and preventing localized heat accumulation. The gas equalization unit 3 also includes a connecting pipe 32, and the gas equalization structure 31 is connected in parallel to the gas supply pipe via the connecting pipe 32, so as to ensure that the gas supply to each gas equalization structure 31 tends to be consistent, thereby making the temperature in the cabinet tend to be consistent and preventing local heat accumulation.

[0031] Further, see Figure 1The air distribution structure 31 is an air distribution plate. The air distribution plate is hollow inside, and the upper surface of the air distribution plate is provided with air distribution holes 311. The air distribution plate divides the cabinet into multiple chambers. For example, an air distribution plate can be set at the bottom wall of the cabinet and another air distribution plate can be set in the middle of the cabinet, so that the two air distribution plates and the upper air distribution plate and the top wall of the cabinet each form a chamber. It can be understood that, apart from leaving enough gaps for the power supply line and the connecting pipe 32 to pass through, the other parts of the air distribution plate can be kept in contact with the side wall of the cabinet, so that the chambers are in a state of near isolation, so that the heat between adjacent chambers is not easily transferred to each other, and even if the temperature in some chambers is too high, it is not advisable to affect the temperature of the entire cabinet.

[0032] Furthermore, the connecting pipe 32 is equipped with a solenoid valve 33, and each air distribution plate has a corresponding solenoid valve 33. The solenoid valve 33 controls the air supply rate of the air supply unit 2 to each air distribution plate, thereby enabling targeted adjustment of the air intake of each chamber. This allows for precise control of the temperature of each chamber and allows electronic devices with similar heat generation to be placed in the same chamber. For example, electronic devices with lower heat generation can be placed in the upper chamber and electronic devices with higher heat generation can be placed in the lower chamber. By controlling the solenoid valve 33, the air intake of the upper chamber is relatively small and the air intake of the lower chamber is relatively large, so as to keep the temperature of both chambers within the set temperature range. This method can also provide auxiliary cooling to the lower chamber through the bottom surface of the air distribution plate located in the middle of the cabinet, resulting in higher heat transfer efficiency and greater energy saving. Of course, it is understandable that relatively heat-resistant electronic components can be placed in one chamber and relatively heat-sensitive electronic components in another chamber. For example, relatively heat-resistant electronic components can be placed in the upper chamber and relatively heat-sensitive electronic components can be placed in the lower chamber, thus achieving temperature zoning within the cabinet. This eliminates the need to maintain the temperature of the entire cabinet at a low level, thereby achieving greater energy savings.

[0033] Furthermore, such as Figure 1 As shown, each chamber has at least one pair of air vents opposite each other on the side wall of the cabinet. The air vents are located at the upper part of the chamber so that the gas can be discharged from the chamber and form a gas circulation path from the middle of the chamber to the outside. This can effectively remove the heat from the middle of the chamber and thus effectively reduce the problem of local heat accumulation.

[0034] Furthermore, a fan 6 is installed in the air outlet to extract the gas from the cabinet. It should be noted that the total rate at which the fans 6 of each chamber extract the gas from the cabinet is lower than the rate at which the air supply unit 2 supplies the gas to the cabinet (i.e., the chamber), so as to ensure that the cabinet is under positive pressure and that external air cannot easily enter the cabinet from the air outlet.

[0035] Furthermore, the detection unit 4 includes temperature sensors, with each chamber equipped with a temperature sensor. These sensors are connected to the control unit 5 to transmit temperature signals. The control unit 5 controls the opening of the corresponding solenoid valve 33 based on the temperature signals transmitted by each sensor. This allows control over whether and how much air is supplied to the corresponding chamber, thus controlling the temperature of each chamber. A fan 6 is connected to the control unit 5. The control unit 5 controls the rate at which the fan 6 extracts gas from the cabinet based on the temperature signals transmitted by the temperature sensors, ensuring that each chamber is under positive pressure. The temperature sensors may include resistance temperature detectors (RTDs) and infrared thermal sensors. The RTD detects the average temperature at its location, i.e., the average temperature within the cabinet or corresponding chamber. The infrared thermal sensor's detection section faces all electronic components within the entire cabinet or corresponding chamber to detect their temperature, facilitating the identification of localized high temperatures. The RTDs and infrared thermal sensors and their detection methods described above all utilize existing technology and will not be elaborated upon here.

[0036] Understandably, the control unit 5 can be a computer equipped with a display screen to display the temperature information measured by the temperature sensors in each chamber in real time for easy viewing.

[0037] Based on the constant temperature control cabinet described above in this invention, see [reference] Figure 1 The second aspect of the present invention provides a method for constant temperature control of a control cabinet 1, comprising the following steps: Turn on gas supply unit 2 to supply gas into the cabinet; Detection unit 4 is activated to monitor the temperature inside the cabinet in real time. The control unit 5 responds to the temperature information fed back by the detection unit 4 and controls the rate at which the air supply unit 2 supplies air into the cabinet until the temperature information fed back by the detection unit 4 is within a preset range.

[0038] Based on the above technical solution, since the constant temperature control method of the control cabinet 1 provided in the second aspect of this application supplies air into the cabinet through the air supply unit 2, the air supplied into the cabinet will overflow from the air outlet, thereby carrying away the heat inside the cabinet. During this process, the detection unit 4 will detect the temperature inside the cabinet in real time and transmit the temperature signal to the control unit 5. The control unit 5 can then adjust the air supply rate of the air supply unit 2 to the cabinet in real time according to the real-time feedback temperature signal, thereby controlling the air intake to achieve the purpose of controlling the temperature inside the cabinet and keeping the temperature inside the cabinet within the set range.

[0039] Specifically, in response to the temperature information fed back by the detection unit 4 being within the first warning range, such as 40℃-50℃, the control unit 5 controls the air supply unit 2 to supply air into the cabinet at a first air supply rate range. Taking a cabinet interior space of 1m³ as an example, the first air supply rate could be 0.1m³ / s-0.2m³ / s. In response to the temperature information fed back by the detection unit 4 being within the second warning range, such as above 50℃, the control unit 5 controls the air supply unit 2 to supply air into the cabinet at a second air supply rate range. Taking a cabinet interior space of 1m³ as an example, the first air supply rate could be 0.2m³ / s-0.4m³ / s. In response to the temperature information fed back by the detection unit 4 being within the safe range, such as below 40℃, the control unit 5 controls the air supply unit 2 to stop supplying air into the cabinet. Understandably, considering the structure of the constant temperature control cabinet described above, the adjustment of the gas supply rate of the gas supply unit 2 is achieved by controlling the opening of the solenoid valve 33, and the specific first warning range, second warning range, and safety range can be set according to the specific heat resistance of the electronic components in the control cabinet 1.

[0040] Furthermore, based on the aforementioned structure of the constant temperature control cabinet with a fan 6 inside the air outlet, the air extraction rate of the fan 6 can be further controlled in response to the temperature information fed back by the detection unit 4. Specifically, if the temperature information fed back by the detection unit 4 is within the first warning range, such as 40℃-50℃, then the control unit 5 controls the fan 6 to extract air from the cabinet at the first extraction rate range. Taking the space inside the cabinet as 1m³ and the corresponding first air supply rate of the air supply unit 2 as 0.1m³ / s-0.2m³ / s as an example, the first extraction rate range can be 0.09m³ / s-0.18m³ / s. If the temperature information from the detection unit 4 is within the second warning range, such as above 50℃, then the control unit 5 controls the fan 6 to extract air from the cabinet at a second extraction rate range. Taking a cabinet interior space of 1m³ and a corresponding second air supply rate of 0.2m³ / s-0.4m³ / s for the air supply unit 2, the second extraction rate range could be 0.18m³ / s-0.36m³ / s. If the temperature information from the detection unit 4 is within the safe range, such as below 40℃, then the control unit 5 controls the air supply unit 2 to stop supplying air to the cabinet, and the fan 6 also stops extracting air.

[0041] Furthermore, based on the design of the temperature sensors in the aforementioned constant temperature control cabinet, including resistance temperature detectors (RTDs) and infrared thermal sensors, the average temperature of the local area measured by the RTD and the highest temperature of the local area measured by the infrared thermal sensor can be combined to determine whether a local high temperature exists. If the difference between the highest temperature of the local area measured by the infrared thermal sensor and the average temperature of the local area measured by the RTD reaches 8°C or more, a local high temperature is determined to exist. If a local high temperature is determined to exist, taking a cabinet interior space of 1 m³ as an example, the air supply unit 2 is controlled to supply air into the cabinet at a second air supply rate of 0.2 m³ / s-0.4 m³ / s, and the fan 6 is controlled to extract air from the cabinet at a second extraction rate range of 0.18 m³ / s-0.36 m³ / s to achieve rapid cooling of the local area, thereby eliminating the local high temperature.

[0042] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A constant temperature control cabinet, characterized in that, include: Control cabinet (1), including cabinet body, wherein the cabinet body is provided with multiple air outlets; The gas supply unit (2) is used to supply gas into the cabinet. An equalization unit (3) is installed inside the cabinet and connected to the gas supply unit (2); The detection unit (4) is located inside the cabinet and is used to detect the temperature inside the cabinet; Control unit (5), the detection unit (4) is connected to the control unit (5) to transmit a temperature signal to the control unit (5), the air supply unit (2) is connected to the control unit (5), and the control unit (5) controls the air supply rate of the air supply unit (2) to supply air into the cabinet based on the transmitted temperature signal.

2. The constant temperature control cabinet according to claim 1, characterized in that, The gas supply unit (2) includes a gas supply pipeline connected to a gas source, and the gas supply pipeline is equipped with an on / off valve (21).

3. The constant temperature control cabinet according to claim 2, characterized in that, The gas supply unit (2) also includes a filter pressure reducing valve (22) installed on the gas supply pipeline.

4. The constant temperature control cabinet according to claim 2 or 3, characterized in that, The gas equalization unit (3) includes a gas equalization structure (31), and the gas equalization structure (31) is provided with a plurality of gas equalization holes (311). The gas equalization structure (31) is provided with a plurality of holes, and the plurality of gas equalization structures (31) are arranged along the height direction of the cabinet. The gas equalization unit (3) also includes a connecting pipe (32), and the gas equalization structure (31) is connected in parallel to the gas supply pipe via the connecting pipe (32).

5. The constant temperature control cabinet according to claim 4, characterized in that, The gas distribution structure (31) is a gas distribution plate, and the upper surface of the gas distribution plate is provided with the gas distribution holes (311). The gas distribution plate divides the cabinet body into multiple chambers.

6. The constant temperature control cabinet according to claim 5, characterized in that, The connecting pipe (32) is equipped with a solenoid valve (33), and each of the gas equalization plates has a corresponding solenoid valve (33) to control the gas supply rate of the gas supply unit (2) to each of the gas equalization plates via the solenoid valve (33).

7. The constant temperature control cabinet according to claim 6, characterized in that, Each chamber has at least one pair of air vents located opposite each other on the side wall of the cabinet, and the air vents are located at the upper part of the chamber.

8. The constant temperature control cabinet according to claim 7, characterized in that, The air outlet is equipped with a fan (6) to extract the gas from the cabinet through the fan (6), and the total rate at which the fan (6) extracts the gas from the cabinet is lower than the rate at which the gas supply unit (2) supplies gas to the cabinet.

9. The constant temperature control cabinet according to claim 8, characterized in that, The detection unit (4) includes a temperature sensor, and each of the chambers is provided with the temperature sensor. The temperature sensor is connected to the control unit (5) to transmit a temperature signal to the control unit (5). The control unit (5) controls the opening degree of the corresponding solenoid valve (33) based on the temperature signal transmitted by each of the temperature sensors. The fan (6) is connected to the control unit (5), and the control unit (5) controls the rate at which the fan (6) extracts gas from the cabinet based on the temperature signal transmitted by the temperature sensor.

10. A method for constant temperature control of a control cabinet, implemented using a constant temperature control cabinet as described in any one of claims 1-9, characterized in that, Includes the following steps: Turn on the gas supply unit (2) to supply gas into the cabinet; The detection unit (4) is activated to detect the temperature inside the cabinet in real time; The control unit (5) controls the rate at which the gas supply unit (2) supplies gas into the cabinet in response to the temperature information fed back by the detection unit (4) until the temperature information fed back by the detection unit (4) is within a preset range.

11. The constant temperature control method for the control cabinet according to claim 10, characterized in that, In response to the temperature information fed back by the detection unit (4) being within the first warning range, the control unit (5) controls the gas supply unit (2) to supply gas to the cabinet at a first gas supply rate range; In response to the temperature information fed back by the detection unit (4) being within the second warning range, the control unit (5) controls the gas supply unit (2) to supply gas to the cabinet at the second gas supply rate range; In response to the temperature information fed back by the detection unit (4) being within a safe range, the control unit (5) controls the gas supply unit (2) to stop supplying gas to the cabinet.

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