Ventilation control method, control device and cabinet ventilation structure

Abstract

The application provides a ventilation control method, a control device and a cabinet ventilation structure, comprising: obtaining temperature data of a target scene or further obtaining air pressure data of an air inlet and an air outlet of the target scene; determining whether to start an internal circulation fan and / or a fresh air fan according to the temperature data, and determining a temperature change rate according to a change of the temperature data over time; and controlling a rotating speed of the internal circulation fan and / or the fresh air fan according to at least one of the temperature change rate, the air pressure data and the temperature data. According to the technical scheme of the application, the rotating speed of the internal circulation fan and the fresh air fan is controlled according to the temperature data, the temperature change data and the air pressure data, so that the air volume can be flexibly regulated and controlled under the premise of fully meeting the temperature control requirement, energy waste caused by constant rotating speed of the fan is avoided, and the corresponding air inlet filter screen is prevented from continuously working under high load.

Description

Technical Field

[0001] This invention relates to the field of ventilation control technology, and in particular to a ventilation control method, control device, and cabinet ventilation structure. Background Technology

[0002] Currently, many electrical components in electrical equipment require heat dissipation, which is generally achieved by using fans to ventilate the internal components and cool them down. However, when using fans for heat dissipation, they typically operate at a constant speed without being adjusted for changes in environmental parameters such as temperature. Furthermore, current technology does not consider that electrical equipment installed on vehicles will experience changes in its operating environment due to vehicle movement, which in turn will cause fluctuations in environmental parameters such as temperature. All of these factors contribute to ineffective heat dissipation.

[0003] Therefore, in order to solve the above problems, the present invention proposes a ventilation control method, a control device, and a cabinet ventilation structure. Summary of the Invention

[0004] To address the problem of existing technologies lacking targeted control of fan speed, this invention proposes a ventilation control method, control device, and cabinet ventilation structure.

[0005] In a first aspect, the present invention provides a ventilation control method, comprising:

[0006] Obtain temperature data of the target scene or further obtain air pressure data of the air inlet and air outlet of the target scene;

[0007] Based on the temperature data, determine whether to start the internal circulation fan and / or the fresh air fan, and determine the rate of temperature change based on the change of the temperature data over time;

[0008] The rotational speed of the internal circulation fan and / or the fresh air fan is controlled based on the rate of temperature change or based on at least one of the wind pressure data and the temperature data, as well as the rate of temperature change.

[0009] In one embodiment, when the internal circulation fan and / or the fresh air fan are started, the respective fans are operated at a predetermined initial speed.

[0010] In one embodiment, determining whether to activate the internal circulation fan and / or the fresh air fan based on the temperature data includes:

[0011] When the heating temperature in the temperature data is greater than the first temperature threshold, the internal circulation fan is activated, where the heating temperature is the temperature of the heating element in the target scenario.

[0012] When the scene temperature in the temperature data is greater than the second temperature threshold and greater than the ambient temperature in the temperature data, the fresh air fan is activated. The scene temperature and the ambient temperature are the temperatures inside and outside the target scene, respectively.

[0013] In one implementation, it further includes:

[0014] The rotational speed of the internal circulation fan is controlled according to the first rate of change of the heating temperature over time.

[0015] When the first rate of change is characterized as an increase in the heating temperature, the rotational speed of the internal circulation fan is increased;

[0016] When the first rate of change is characterized as a decrease in the heating temperature, the rotational speed of the internal circulation fan is reduced.

[0017] In one implementation, it further includes:

[0018] The rotational speed of the fresh air fan is controlled based on the second rate of change of the scene temperature over time and the wind pressure data.

[0019] When the air pressure at the air inlet is less than the air pressure at the air outlet and the second rate of change indicates that the scene temperature is rising, the rotation speed of the fresh air fan is increased.

[0020] When the air pressure at the air inlet is greater than the air pressure at the air outlet and the second rate of change indicates that the scene temperature is decreasing, the rotation speed of the fresh air fan is reduced.

[0021] In one implementation, it further includes:

[0022] The rotational speeds of the fresh air fan and the internal circulation fan are controlled based on the second rate of change of the scene temperature over time, the relationship between the scene temperature and the ambient temperature, and the wind pressure data.

[0023] When the air pressure at the air inlet is not less than the air pressure at the air outlet, and the second rate of change is characterized by the scene temperature rising and the scene temperature not being less than the ambient temperature, the speed of the fresh air fan remains constant while the speed of the internal circulation fan is increased.

[0024] When the air pressure at the air inlet is greater than the air pressure at the air outlet, and the second rate of change indicates that the scene temperature is rising and the scene temperature is lower than the ambient temperature, the speed of the fresh air fan is reduced and the speed of the internal circulation fan is increased.

[0025] In one implementation, it further includes:

[0026] When adjusting the speed of the corresponding fan according to the rate of temperature change, the speed of the corresponding fan is increased or decreased by a preset speed value corresponding to the threshold range, based on the current threshold range of the rate of temperature change.

[0027] Secondly, the present invention provides a ventilation control device comprising:

[0028] The data acquisition module is used to acquire temperature data of the target scene or further acquire air pressure data of the air inlet and air outlet of the target scene;

[0029] The data analysis module is used to determine whether to start the internal circulation fan and / or the fresh air fan based on the temperature data, and to determine the rate of temperature change based on the change of the temperature data over time; and

[0030] A speed control module is used to control the speed of the internal circulation fan and / or the fresh air fan based on the temperature change rate or based on at least one of the wind pressure data and the temperature data, and the temperature change rate.

[0031] Thirdly, the present invention proposes a cabinet ventilation structure that applies the above-mentioned ventilation control method.

[0032] In one embodiment, it includes an internal circulation fan disposed in the cabinet, a fresh air fan disposed at the air inlet of the cabinet, and a sensor assembly;

[0033] The sensors include a temperature sensor and a pressure sensor. The temperature sensor is located inside the cabinet, at the heating element inside the cabinet, and outside the cabinet. The pressure sensor is located at the air outlet and air inlet of the cabinet.

[0034] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0035] The ventilation control method, control device, and cabinet ventilation structure provided by this invention have at least the following advantages compared with the prior art:

[0036] The present invention discloses a ventilation control method, control device, and cabinet ventilation structure. Based on temperature data, temperature change data, and air pressure data, the speed control of the internal circulation fan and the fresh air fan is performed. Under the premise of fully meeting the temperature control requirements, the air volume can be flexibly adjusted to avoid energy waste caused by constant fan speed and to avoid the corresponding air intake filter being under high load conditions continuously. Attached Figure Description

[0037] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0038] Figure 1 A schematic diagram showing the main flow of the control method of the present invention is provided.

[0039] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale. Detailed Implementation

[0040] The invention will now be further described with reference to the accompanying drawings.

[0041] Example 1

[0042] This embodiment mainly focuses on the principle and process of controlling the internal circulation fan.

[0043] An embodiment of the present invention provides a ventilation control method, comprising:

[0044] Step S100: Obtain the heating temperature of the heating element in the target scene.

[0045] Step S200: Determine whether to start the internal circulation fan based on the heating temperature, and determine the first temperature change rate (temperature change value per unit time) based on the change of heating temperature over time.

[0046] Step S210: When the heating temperature is greater than the first temperature threshold, start the internal circulation fan and make the internal circulation fan run at a predetermined initial speed.

[0047] Specifically, in this embodiment, the internal circulation fan is started when the heating temperature is greater than 40°C, and runs at an initial speed of 600 revolutions per minute. The internal circulation fan is turned off when the heating temperature is less than 33°C. The speed of the internal circulation fan is controlled during operation.

[0048] Step S300: Control the speed of the internal circulation fan according to the first temperature change rate, and increase or decrease the speed of the internal circulation fan by a preset speed value corresponding to the threshold range based on the current threshold range of the first temperature change rate.

[0049] Step S310: When the first rate of change is characterized as an increase in heating temperature, increase the speed of the internal circulation fan;

[0050] Step S311: If the first rate of change Δt1, which characterizes the increase in heating temperature, is... up If the temperature threshold range is (1℃, 2℃), then the speed of the internal circulation fan should be increased by 80 revolutions.

[0051] Step S312: If the first rate of change Δt1, which characterizes the increase in heating temperature, is... up If the temperature threshold range is (2℃, 3℃), then the speed of the internal circulation fan will be increased by 130 revolutions.

[0052] Step S313: If the first rate of change Δt1, which characterizes the increase in heating temperature, is... up If the temperature threshold range is (3℃, +∞), then the speed of the internal circulation fan will be increased by 200 revolutions.

[0053] Step S320: When the first rate of change is characterized by a decrease in the heating temperature, reduce the speed of the internal circulation fan;

[0054] Step S321: If the first rate of change Δt1, which characterizes the decrease in heating temperature, is... down If the temperature threshold range is (1℃, 2℃), then the internal circulation fan speed will be reduced by 50 revolutions.

[0055] Step S322: If the first rate of change Δt1, which characterizes the decrease in heating temperature, is... down If the temperature threshold range is (2℃, 3℃), then the internal circulation fan speed will be reduced by 100 rpm.

[0056] Step S323: If the first rate of change Δt1, which characterizes the decrease in heating temperature, is... down If the temperature threshold range is (3℃, +∞), then the internal circulation fan will be reduced by 170 revolutions.

[0057] Specifically, to address the heat dissipation of the heat-generating components within the target environment, the first step should be to increase the airflow and circulation within the environment, which can be achieved by increasing the speed of the internal circulation fan. If the temperature of the heat-generating components is decreasing, the speed of the internal circulation fan can be reduced to save energy. Furthermore, the control of the internal circulation fan described above can be implemented using intermittent control throughout the entire process, meaning that the temperature data is monitored at regular intervals, and the fan speed is adjusted accordingly.

[0058] Example 2

[0059] This embodiment mainly focuses on the principle and process of controlling the fresh air fan.

[0060] An embodiment of the present invention provides a ventilation control method, comprising:

[0061] Step S100: Obtain the scene temperature inside the target scene and the ambient temperature outside the scene, and further obtain the air pressure data of the air inlet and air outlet of the target scene.

[0062] Step S200: Determine whether to start the fresh air fan based on the scene temperature and ambient temperature, and determine the second temperature change rate (temperature change value per unit time) based on the change of scene temperature over time.

[0063] Step S210: When the scene temperature is greater than the second temperature threshold and greater than the ambient temperature, start the fresh air fan and make the fresh air fan run at a predetermined initial speed.

[0064] Specifically, in this embodiment, the fresh air fan is activated when the scene temperature is greater than 40°C and also greater than the ambient temperature, running at an initial speed of 500 revolutions per minute. The fresh air fan is then shut off when the scene temperature is less than 30°C. Speed ​​control is implemented during the operation of the fresh air fan.

[0065] Step S300: Control the speed of the fresh air fan according to the second temperature change rate and wind pressure data. According to the threshold range of the current second temperature change rate, increase or decrease the speed of the fresh air fan by a preset speed value corresponding to the threshold range.

[0066] Step S310: When the air pressure at the air inlet is less than the air pressure at the air outlet and the second rate of change is characterized by an increase in the scene temperature, increase the speed of the fresh air fan.

[0067] Step S311: If the second rate of change Δt2 characterizes the increase in scene temperature up If the temperature threshold range is (1℃, 2℃), then the speed of the fresh air fan should be increased by 120 revolutions.

[0068] Step S312: If the second rate of change Δt2 characterizing the increase in scene temperature up If the temperature threshold range is (2℃, 3℃), then the speed of the fresh air fan should be increased by 190 revolutions.

[0069] Step S313: If the second rate of change Δt2 characterizing the increase in scene temperature up If the temperature threshold range is (3℃, +∞), then the speed of the fresh air fan will be increased by 280 revolutions.

[0070] Step S320: When the air pressure at the air inlet is greater than the air pressure at the air outlet and the second rate of change is characterized by a decrease in the scene temperature, reduce the speed of the fresh air fan.

[0071] Step S321: If the second rate of change Δt2 characterizing the decrease in scene temperature down If the temperature threshold range is (1℃, 2℃), then the speed of the fresh air fan will be reduced by 100 revolutions.

[0072] Step S322: If the second rate of change Δt2 characterizes the decrease in scene temperature down If the temperature threshold range is (2℃, 3℃), then the speed of the fresh air fan will be reduced by 170 revolutions.

[0073] Step S323: If the second rate of change Δt2 characterizing the decrease in scene temperature downIf the temperature threshold range is (3℃, +∞), then the speed of the fresh air fan will be reduced by 260 revolutions.

[0074] Specifically, for heat dissipation within the target environment's interior space, control is implemented based on the environment's temperature and the ambient temperature. Primarily, when the ambient temperature is lower than the environment temperature, the speed of the fresh air fan is increased to enhance the introduction of cool external air, based on the rate of temperature change. If the environment temperature itself is decreasing, the speed of the fresh air fan can be reduced to save energy. Furthermore, the control of the fresh air fan can employ intermittent control throughout the process, meaning that the temperature data is monitored at regular intervals, and the fan speed is adjusted accordingly.

[0075] Furthermore, referring to steps S310 to S313 and S320 to S323, the speed of the fresh air fan is controlled based on the air pressure at the inlet and outlet. This not only meets the temperature control requirements but also adjusts the air pressure at the inlet, ensuring that the inlet pressure does not exceed the outlet pressure to prevent localized negative pressure within the target environment. Moreover, whether adjusting the speed of the fresh air fan alone, the internal circulation fan alone, or both fans simultaneously, it is essential to consider preventing localized negative pressure within the target environment.

[0076] Example 3

[0077] This embodiment mainly focuses on the principle and process of joint control of internal circulation fan and fresh air fan.

[0078] An embodiment of the present invention provides a ventilation control method, comprising:

[0079] Step S100: Obtain the scene temperature inside the target scene, the ambient temperature outside the scene, and the heating temperature of the heating element inside the target scene, and further obtain the air pressure data of the air inlet and air outlet of the target scene.

[0080] Step S200: Determine whether to start the internal circulation fan and the fresh air fan based on the heating temperature, scene temperature and ambient temperature, and determine the first temperature change rate and the second temperature change rate based on the changes in heating temperature and scene temperature over time.

[0081] Step S210: Determine that the heating temperature is greater than the first temperature threshold, start the internal circulation fan and make the internal circulation fan run at a predetermined initial speed; determine that the scene temperature is greater than the second temperature threshold and greater than the ambient temperature, start the fresh air fan and make the fresh air fan run at a predetermined initial speed.

[0082] Step S300: Control the speed of the internal circulation fan and the fresh air fan according to the wind pressure data, scene temperature and ambient temperature and the second temperature change rate. According to the threshold range of the current second temperature change rate, increase or decrease the speed of the internal circulation fan and the fresh air fan by a preset speed value corresponding to the threshold range.

[0083] Step S310: When the air pressure at the air inlet is not less than the air pressure at the air outlet, the scene temperature is not less than the ambient temperature, and the second rate of change is characterized by an increase in scene temperature, keep the speed of the fresh air fan constant and increase the speed of the internal circulation fan.

[0084] Step S311: If the second rate of change Δt2 characterizes the increase in scene temperature up If the temperature threshold range is (1℃, 2℃), then keep the speed of the fresh air fan constant and increase the speed of the internal circulation fan by 100 revolutions.

[0085] Step S312: If the second rate of change Δt2 characterizing the increase in scene temperature up If the temperature threshold range is (2℃, 3℃), then keep the speed of the fresh air fan constant and increase the speed of the internal circulation fan by 150 revolutions.

[0086] Step S313: If the second rate of change Δt2 characterizing the increase in scene temperature up If the temperature threshold range is (3℃, +∞), then keep the speed of the fresh air fan constant and control the speed of the internal circulation fan to increase by 240 revolutions.

[0087] Step S320: When the air pressure at the air inlet is greater than the air pressure at the air outlet, the scene temperature is less than the ambient temperature, and the second rate of change is characterized by an increase in scene temperature, reduce the speed of the fresh air fan and increase the speed of the internal circulation fan.

[0088] Step S321: If the second rate of change Δt2 characterizes the increase in scene temperature up If the temperature threshold range is (1℃, 2℃), then the speed of the fresh air fan will be reduced by 200 rpm and the speed of the internal circulation fan will be increased by 150 rpm.

[0089] Step S322: If the second rate of change Δt2 characterizes the increase in scene temperature up If the temperature threshold range is (2℃, 3℃), then the speed of the fresh air fan will be reduced by 300 rpm and the speed of the internal circulation fan will be increased by 260 rpm.

[0090] Step S323: If the second rate of change Δt2 characterizing the increase in scene temperature up If the temperature threshold range is (3℃, +∞), then the speed of the fresh air fan will be reduced by 400 rpm and the speed of the internal circulation fan will be increased by 380 rpm.

[0091] The feature is that when the internal circulation fan and / or fresh air fan are started, the corresponding fan is operated at a predetermined initial speed.

[0092] Specifically, this embodiment mainly proposes to jointly control the internal circulation fan and the fresh air fan based on ambient temperature, scene temperature and the rate of change of scene temperature, combined with wind pressure data, so as to improve the effect of temperature regulation.

[0093] Taking steps S310 to S313 as an example, the air pressure at the air inlet is not less than the air pressure at the air outlet, indicating that the air intake of the target scene is sufficient, that is, the speed of the fresh air fan is appropriate. At this time, if the ambient temperature is not greater than the scene temperature, the scene temperature is still on the rise. Considering that the air circulation in the target scene may be insufficient, the speed of the fresh air fan is kept constant while the speed of the internal circulation fan is increased to improve the air circulation inside the target scene.

[0094] Taking steps S320 to S323 as an example, the air pressure at the air inlet is greater than that at the air outlet, indicating that the air intake of the target scene is sufficient, that is, the speed of the fresh air fan is high. However, the ambient temperature is higher than the scene temperature, and the scene temperature is still on the rise. Considering that too much external air with a high temperature may be introduced, the speed of the fresh air fan is reduced and the speed of the internal circulation fan is increased to reduce the amount of external air introduced and increase the air flow inside the target scene.

[0095] It should be noted that the above embodiments are merely examples of three control methods or three actual situations, and the solution of the present invention is not limited to the above three methods. For example, when both the internal circulation fan and the fresh air fan are started, the speeds of the internal circulation fan and the fresh air fan can be controlled separately using the methods of Embodiment 1 and Embodiment 2, respectively. Alternatively, the speeds of the two fans can be jointly controlled, as in Embodiment 3. Or, they can be controlled separately using the methods of Embodiment 1 or Embodiment 2, and then jointly controlled using the method of Embodiment 3.

[0096] Furthermore, the temperature and wind pressure conditions (including specific parameter values ​​and the relationships between the parameters) in the above embodiments are merely illustrative examples and are not intended to limit the invention. The same approach can be used for speed control under other temperature and wind pressure conditions.

[0097] Example 4

[0098] An embodiment of the present invention provides a ventilation control device, comprising:

[0099] The data acquisition module is used to acquire temperature data of the target scene or further acquire air pressure data of the air inlet and outlet of the target scene;

[0100] The data analysis module is used to determine whether to activate the internal circulation fan and / or the fresh air fan based on temperature data, and to determine the rate of temperature change based on the temperature data over time; and

[0101] A speed control module is used to control the speed of the internal circulation fan and / or the fresh air fan based on the rate of temperature change or based on at least one of wind pressure data and temperature data, as well as the rate of temperature change.

[0102] Example 5

[0103] An embodiment of the present invention provides a cabinet ventilation structure that applies the above-described ventilation control method. The cabinet ventilation structure includes an internal circulation fan installed inside the cabinet, a fresh air fan installed at the air inlet of the cabinet, and a sensor assembly.

[0104] The sensors include temperature sensors and pressure sensors. The temperature sensors are located inside the cabinet, at the heating element inside the cabinet, and outside the cabinet. The pressure sensors are located at the air outlet and air inlet of the cabinet. A filter is installed at the air inlet.

[0105] Based on the control method of the aforementioned embodiments, after control is performed, the air intake volume (i.e., achieved by controlling the fan speed) can be controlled while ensuring positive air pressure inside the cabinet. This ensures the accuracy and effectiveness of temperature control and avoids unnecessary excessive air volume, thereby reducing the load on the air intake filter and extending the filter's service life.

[0106] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 this invention.

[0107] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A ventilation control method, characterized in that, include: The system acquires the scene temperature inside the target scene, the ambient temperature outside the scene, and the heating temperature of the heating element inside the target scene. It also acquires the air pressure data of the air inlet and outlet of the target scene. The decision to start the internal circulation fan and the fresh air fan is based on the heating temperature, the scene temperature and the ambient temperature. The first temperature change rate and the second temperature change rate are determined based on the changes in the heating temperature and the scene temperature over time. Once the heating temperature is determined to be greater than the first temperature threshold, the internal circulation fan is started, and the internal circulation fan is made to run at the predetermined initial speed. Once the scene temperature is determined to be greater than the second temperature threshold and greater than the ambient temperature, the fresh air fan is started and runs at a predetermined initial speed. The speed of the internal circulation fan and the fresh air fan is controlled based on wind pressure data, scene temperature and ambient temperature, and the second temperature change rate. According to the threshold range of the current second temperature change rate, the speed of the internal circulation fan and the fresh air fan is increased or decreased by a preset speed value corresponding to the threshold range.

2. The ventilation control method according to claim 1, characterized in that, When the internal circulation fan and the fresh air fan are started, the corresponding fans are operated at a predetermined initial speed.

3. The ventilation control method according to claim 1, characterized in that, Also includes: The rotational speed of the internal circulation fan is controlled according to the first temperature change rate of the heating temperature over time. When the first temperature change rate is characterized as an increase in the heating temperature, the rotational speed of the internal circulation fan is increased; When the first rate of temperature change is characterized as a decrease in the heating temperature, the rotational speed of the internal circulation fan is reduced.

4. The ventilation control method according to claim 1, characterized in that, Also includes: The rotational speed of the fresh air fan is controlled based on the second temperature change rate of the scene temperature over time and the wind pressure data. When the air pressure at the air inlet is less than the air pressure at the air outlet and the second temperature change rate indicates that the scene temperature is rising, the rotation speed of the fresh air fan is increased. When the air pressure at the air inlet is greater than the air pressure at the air outlet and the second temperature change rate indicates that the scene temperature is decreasing, the rotation speed of the fresh air fan is reduced.

5. The ventilation control method according to claim 1 or 4, characterized in that, Also includes: The rotational speeds of the fresh air fan and the internal circulation fan are controlled based on the second temperature change rate of the scene temperature over time, the relationship between the scene temperature and the ambient temperature, and the wind pressure data. When the air pressure at the air inlet is not less than the air pressure at the air outlet, and the second temperature change rate is characterized as the scene temperature rising and the scene temperature not being less than the ambient temperature, the speed of the fresh air fan remains unchanged, and the speed of the internal circulation fan is increased. When the air pressure at the air inlet is greater than the air pressure at the air outlet, and the second temperature change rate is characterized by an increase in the scene temperature and a decrease in the scene temperature compared to the ambient temperature, the speed of the fresh air fan is reduced and the speed of the internal circulation fan is increased.

6. The ventilation control method according to claim 1, characterized in that, Also includes: When adjusting the speed of the corresponding fan according to the rate of temperature change, the speed of the corresponding fan is increased or decreased by a preset speed value corresponding to the threshold range, based on the current threshold range of the rate of temperature change.

7. A cabinet ventilation structure, characterized in that, Its application is the ventilation control method as described in any one of claims 1 to 6, including an internal circulation fan installed in the cabinet, a fresh air fan installed at the air inlet of the cabinet, and a sensor assembly; The sensors include a temperature sensor and a pressure sensor. The temperature sensor is located inside the cabinet, at the heating element inside the cabinet, and outside the cabinet. The pressure sensor is located at the air outlet and air inlet of the cabinet.

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