An air conditioning unit self-regulating air volume balance control method, storage medium and device

Abstract

The application discloses a kind of air conditioning unit self-regulating air volume balance control method, comprising the following steps: calculating actual unit air volume, and obtaining initial unit energy demand;Actual unit air volume is compared with preset air volume range, respectively obtains each room actual air outlet speed parameter, calculates the air speed change value of each room;Air speed change value is compared with air speed change setting value, calculates the air speed change trend of each room or calculates the static pressure change trend of each room;According to the size of air speed change trend, control adjustment corresponding room intelligent air valve size;According to the size of static pressure change trend, control adjustment corresponding room intelligent air valve size;According to the trend of unit air supply volume Z, control adjustment unit energy demand.The application establishes dynamic balance relationship between unit air supply volume and actual user air supply volume, automatically realizes unit air volume and actual user room air volume self-balancing control, and can solve the problem that air volume is too large / small due to different static pressure in different areas.

Description

Technical Field

[0001] This invention relates to a self-regulating air volume balance control method for air conditioning units, belonging to the field of air conditioning control technology. Background Technology

[0002] More and more variable frequency direct expansion units are being widely used in hospitals, biological plants and laboratories. Because the cost is lower than that of multi-split air conditioners, most of them are used in multi-split applications. Based on the unit's single-split design, there are instances where rooms closer to the indoor unit experience excessive airflow due to high static pressure, while rooms farther from the indoor unit experience insufficient airflow due to low static pressure. The large difference in airflow between different rooms often leads to user complaints.

[0003] Most existing technologies rely on manual detection to resolve issues such as excessive or insufficient airflow in a room by manually adjusting dampers or air volume. However, this approach has several drawbacks. Firstly, manual detection is time-consuming and labor-intensive, and lacks automation. Secondly, the large number of rooms often leads to a mismatch between the airflow supplied by the unit (supply side) and the actual airflow supplied by the user (demand side), making it impossible to achieve self-balancing control between the unit's airflow and the actual room airflow. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an air conditioning unit self-regulating air volume balance control method. By establishing a dynamic balance relationship between the unit's air supply volume and the actual user's air supply volume, the method automatically controls the air valve or air volume. It has a high degree of intelligence and can automatically realize the self-balancing control of the unit's air volume and the actual user's room air volume, thus solving the problem of excessive / insufficient air volume in different areas due to different static pressures.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A self-regulating air volume balance control method for air conditioning units includes the following steps:

[0007] Obtain the unit wind speed, unit duct cross-sectional area, and initial unit energy requirement Q of the wind turbine. out The actual air volume Q of the unit is calculated based on the unit wind speed and the cross-sectional area of ​​the unit air duct;

[0008] When the actual unit air volume Q is within the first threshold range, the room air valve is controlled to adjust so that the air supply volume of each room can reach self-balance.

[0009] When the actual unit airflow Q is within the second threshold range, the control unit energy requirement Q out Adjustments are made to achieve self-balance in the air supply volume of each room.

[0010] The calculation of the actual unit air volume Q based on the unit wind speed and the cross-sectional area of ​​the unit air duct includes: multiplying the unit wind speed by the cross-sectional area of ​​the unit air duct to obtain the actual unit air volume Q.

[0011] When the actual unit air volume Q is within the first threshold range, controlling the room air valve adjustment to achieve self-balance of the air supply volume in each room includes:

[0012] Obtain the actual air velocity parameters for each room and calculate the wind speed change value ΔV for each room.

[0013] If the wind speed change value ΔV is not lower than the wind speed change setting value, then calculate the wind speed change trend X for each room. i According to the wind speed change trend X i The size control adjusts the size of the smart air valve corresponding to the room;

[0014] If the wind speed change value ΔV is higher than the wind speed change setting value, then calculate the static pressure change trend Y of each room. j According to the static pressure change trend Y j The size control adjusts the size of the smart air valve corresponding to the room.

[0015] The above is based on the wind speed change trend X i The size control adjusts the size of the smart air valve corresponding to the room, including:

[0016] If the wind speed change trend X i During the first wind speed change range, the corresponding room's air damper is adjusted to increase, and this adjustment is repeated periodically until the smart air damper reaches its maximum opening or the wind speed change trend X is observed. i Increased to the second wind speed variation range;

[0017] If the wind speed change trend X i During the second wind speed variation range, the corresponding room air valve is not controlled or adjusted.

[0018] If the wind speed change trend X i During the third wind speed variation range, the corresponding room's air valve is adjusted to a smaller position, and this adjustment is repeated periodically until the smart air valve reaches its minimum opening or the wind speed variation trend X is observed. i It has decreased to the second wind speed variation range.

[0019] The trend of static pressure change Y j The size control adjusts the size of the smart air valve corresponding to the room, including:

[0020] If the static pressure change trend Y j During the first static pressure change range, the corresponding room damper is adjusted to a larger position, and this adjustment is repeated periodically until the smart damper reaches its maximum opening or the static pressure change trend Y is reached. j Increase to the second static pressure variation range;

[0021] If the static pressure change trend Y j During the second static pressure variation range, the corresponding room damper is not controlled or adjusted.

[0022] If the static pressure change trend Y j During the third static pressure variation range, the corresponding room damper is adjusted to a smaller position, and this adjustment is repeated periodically until the smart damper reaches its minimum opening or the static pressure variation trend Y is met. j Reduce to the second static pressure variation range.

[0023] When the actual unit airflow Q is within the second threshold range, the control unit requires Q. out Adjustments to achieve self-balancing of airflow in each room include:

[0024] Obtain the actual airflow velocity in each room;

[0025] Multiply the room duct cross-section size by the actual air outlet velocity to obtain the room air volume, add up the air volumes of all rooms to obtain the unit air volume, and obtain the unit air volume change trend Z based on the unit air volume.

[0026] Based on the trend of the unit's air supply volume change Z, the unit's energy demand Q is adjusted to be increased. out .

[0027] The energy demand of the unit is adjusted according to the trend of the change in the unit's air supply volume Z. out include:

[0028] If the air volume change trend Z of the unit is within the first air volume change range, the control should increase the unit's energy demand Q according to the first amplitude. out Adjust it periodically until the unit can meet the required Q. out When the maximum value is reached or the air volume change trend of the unit increases to the second air volume change range;

[0029] If the air volume change trend Z of the unit is within the second air volume change range, the control should increase the unit's energy demand Q according to the second amplitude. out Adjust it periodically until the unit can meet the required Q. out When the maximum value is reached or the air volume change trend of the unit increases to the third air volume change range;

[0030] If the air volume change trend Z of the unit is within the third air volume change range, the control should be adjusted to increase the unit's energy demand Q according to the third amplitude. out Until the unit can meet Q out It has reached its maximum value.

[0031] When the actual unit air volume Q is within the third threshold range, the fan overload protection will be reported directly, and the fan will be stopped.

[0032] A storage medium storing a computer program, wherein the computer program is configured to execute the method at runtime.

[0033] An apparatus includes a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the method.

[0034] The beneficial effects of this invention are as follows: The self-regulating air volume balance control method for air conditioning units provided by this invention addresses the mismatch between the air volume supplied by the unit (supply side) and the actual air volume supplied by users (demand side) due to an excessive number of rooms. It establishes a dynamic balance between the air volume supplied by the unit (supply side) and the actual air volume supplied by users (demand side). Using the actual wind speed changes, static pressure changes, and actual unit air volume in different rooms as detection variables, the method uses an algorithm to detect whether the air volume in different rooms meets the requirements. It then adjusts the air valves and increases the air volume to balance the air volume in each room. This solves the problems of excessive / insufficient air volume in different areas and the time-consuming and labor-intensive drawbacks of manual adjustment, thus improving user comfort. Attached Figure Description

[0035] Figure 1 This is a flowchart of an air conditioning unit self-regulating air volume balance control method according to the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of a self-regulating air volume balancing air conditioning unit according to the present invention.

[0037] The attached diagram is labeled as follows: 1-Filter section; 2-Direct expansion section; 3-Electric heating section; 4-Electric humidification section; 5-EC blower; 61-Wind speed sensor; 62-Intelligent air valve. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the scope of protection of the present invention.

[0039] like Figure 2 As shown, the self-regulating air volume balancing air conditioning unit of the present invention includes a filter section 1, a direct expansion section 2, an electric heating section 3, an electric humidification section 4, and an EC blower 5, which are used to provide air volume to four rooms. Each room's air duct is equipped with a wind speed sensor 61 and an intelligent air valve 62, wherein the intelligent air valve 62 includes a pressure detection function.

[0040] like Figure 1 As shown, this invention discloses a self-regulating air volume balance control method for air conditioning units, comprising the following steps:

[0041] Step 1: Before detecting the unit's fan speed, ensure the fan has been running for more than 30 seconds. After the fan has been running for a period of time, detect the fan speed. Multiply the fan speed by the cross-sectional area of ​​the unit's air duct to calculate the actual unit air volume Q. The fan motor is a DC motor, and air volume control can be achieved by changing its speed. The specific speed settings of the fan motor correspond to the speeds shown in Table 1. Additionally, this application requires obtaining the initial unit energy requirement Q. out The unit requires Q. out The final fan speed can be determined by adjusting the unit's energy requirement Q. out To regulate the air volume of the unit.

[0042] Table 1 Fan Speed ​​Corresponding to Fan Gear

[0043] 1 500 2 600 3 700 4 800 5 900 6 1000 7 1100 8 1200 9 1300 10 1400 11 1500 12 1600

[0044] Step two: Compare the actual unit air volume Q with the preset air volume range. The low air volume range is specifically greater than 1000m³ / h. 3 / h and less than or equal to 1300m 3 / h, specifically the range of medium wind volume is greater than 1300m 3 / h and less than or equal to 1600m 3 / h. The high air volume range specifically refers to greater than 1600m³. 3 / h. If the actual unit airflow Q is in the low airflow range, obtain the actual air outlet velocity parameters for each room, calculate the air velocity change value ΔV for each room, and then proceed to step three. If the actual unit airflow Q is in the medium airflow range, obtain the actual air outlet velocity parameters for each room, and then proceed to step six. Finally, if the actual unit airflow Q is in the high airflow range, directly report the fan overload protection and stop the fan operation.

[0045] Step 3: Compare the wind speed change value ΔV with the wind speed change setting value, which is specifically 1 m / s. The wind speed change value ΔV for each room is calculated as follows: ΔV = V 实时 -V 设定 If the wind speed change value ΔV is not lower than the wind speed change setting value, then calculate the wind speed change trend X for each room. i Then proceed to step four, where the wind speed change trend X i = △V2 - △V1, where △V2 represents the wind speed change in the current minute, and △V1 represents the wind speed change in the previous minute. If the wind speed change △V is higher than the set wind speed change value, then the static pressure change trend Y of each room is calculated. j Proceed to step five, where the static pressure change trend Y i = △P2-△P1, where △P2 represents the static pressure change value in the current 1 minute and △P1 represents the static pressure change value in the previous 1 minute. The static pressure value is measured by the pressure sensor built into the intelligent air valve 6262.

[0046] Step 4, based on the wind speed change trend X i The size control adjusts the size of the smart air valve 62 corresponding to the room. Airflow change trend X i Wind speed variation trend X when ≤0.5m / s i If the airflow is too low, adjust the smart damper 62 in the corresponding room by 10%; 0.5m / s < wind speed change trend X i Wind speed variation trend X when <1m / s i Moderate, no adjustment required for the corresponding room's smart air valve 62; airflow change trend X i Wind speed variation trend X when ≥1m / s i If the value is too high, adjust the smart air valve 62 in the corresponding room to a 10% lower value.

[0047] Step 5, based on the static pressure change trend Y j The size control adjusts the size of the smart air valve 62 corresponding to the room. Static pressure change trend Y j When ≤100Pa, the static pressure change trend Y j If the pressure is relatively low, adjust the smart air valve 62 in the corresponding room by 10%; 100Pa < static pressure change trend Y j When the pressure is <300Pa, the smart air valve 62 for the corresponding room is not adjusted; static pressure change trend Y j When ≥300Pa, the static pressure change trend Y j If the value is too high, adjust the smart air valve 62 in the corresponding room to a 10% lower value.

[0048] Step 6: Multiply the room duct cross-section size by the actual air outlet velocity to obtain the room air volume. Add the air volumes of all rooms to obtain the unit air volume. Based on the unit air volume, obtain the unit air volume change trend Z: air volume change trend Z = ΔQ2 - ΔQ1, where ΔQ2 represents the air volume change value in the current 1 minute, and ΔQ1 represents the air volume change value in the previous 1 minute. Then, based on the magnitude of the unit air volume change trend Z, adjust the unit energy demand Q. out Air volume output Q out The corresponding output levels are shown in Table 2. Specifically, the air volume variation trend of the unit is Z≤100m³. 3 / h, the control unit needs Q out Increase by 20%; 100m 3 / h < Unit air supply volume variation trend Z < 200m 3 / h, the control unit needs Q out Increase by 10%; Unit air supply volume change trend Z≥200m 3 / h, the control unit needs Q out Increase by 5%.

[0049] Table 2 Airflow Output Q out Corresponding output level

[0050] <![CDATA[Q out ≤10%]]> 9 <![CDATA[10%<Q out ≤30%]]> 10 <![CDATA[30%<Q out ≤60%]]> 11 <![CDATA[Q out >60%]]> 12

[0051] The present invention also discloses a storage medium storing a computer program, wherein the computer program is configured to execute an air conditioning unit self-regulating air volume balance control method during runtime.

[0052] The present invention also discloses an apparatus including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to execute an air conditioning unit self-regulating air volume balance control method.

[0053] This invention discloses a self-regulating airflow balance control method. It utilizes the actual wind speed changes, static pressure changes, and actual unit airflow in different rooms as detection variables. Through a practical algorithm, it detects whether the airflow in different rooms meets the requirements and adjusts the air valves or increases the airflow to balance the airflow in each room. This solves the problem of excessive / insufficient airflow in different areas, improving user comfort. Furthermore, this invention addresses the mismatch between the unit's (supply side) airflow and the actual user's (demand side) airflow caused by too many rooms. It establishes a dynamic balance relationship between the unit's (supply side) airflow and the actual user's (demand side) airflow, providing a new solution for self-balancing control of the unit's supply side and the actual user side.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for self-regulating air volume balance control of an air conditioning unit, characterized in that: Includes the following steps: Obtain the unit wind speed, unit duct cross-sectional area, and initial unit energy requirement Q of the wind turbine. out The actual air volume Q of the unit is calculated based on the unit wind speed and the cross-sectional area of ​​the unit air duct; When the actual unit air volume Q is within the low air volume range, the room dampers are adjusted to achieve self-balance of the air supply volume in each room, which includes: Obtain the actual air velocity parameters for each room and calculate the wind speed change value ΔV for each room. If the wind speed change value ΔV is not lower than the wind speed change setting value, then calculate the wind speed change trend X for each room. i According to the wind speed change trend X i The size control adjusts the size of the smart air valve corresponding to the room; If the wind speed change value ΔV is lower than the wind speed change setting value, then calculate the static pressure change trend Y of each room. j According to the static pressure change trend Y j The size control adjusts the size of the smart air valve corresponding to the room; When the actual unit air volume Q is within the medium air volume range, the control unit energy requirement Q out Adjustments are made to achieve self-balancing of air supply volume in each room, including: Obtain the actual airflow velocity in each room; Multiply the room duct cross-section size by the actual air outlet velocity to obtain the room air volume, add up the air volumes of all rooms to obtain the unit air volume, and obtain the unit air volume change trend Z based on the unit air volume. Based on the trend of the unit's air supply volume change Z, the unit's energy demand Q is adjusted to be increased. out ; When the actual unit air volume Q is within the high air volume range, the fan overload protection will be reported directly, and the fan will stop running.

2. The self-regulating air volume balance control method for air conditioning units according to claim 1, characterized in that: The calculation of the actual unit air volume Q based on the unit wind speed and the cross-sectional area of ​​the unit air duct includes: multiplying the unit wind speed by the cross-sectional area of ​​the unit air duct to obtain the actual unit air volume Q.

3. The self-regulating air volume balance control method for air conditioning units according to claim 1, characterized in that: The above is based on the wind speed change trend X i The size control adjusts the size of the smart air valve corresponding to the room, including: If the wind speed change trend X i During the first wind speed change range, the corresponding room's air damper is adjusted to increase, and this adjustment is repeated periodically until the smart air damper reaches its maximum opening or the wind speed change trend X is observed. i Increased to the second wind speed variation range; If the wind speed change trend X i During the second wind speed variation range, the corresponding room air valve is not controlled or adjusted. If the wind speed change trend X i During the third wind speed variation range, the corresponding room's air valve is adjusted to a smaller position, and this adjustment is repeated periodically until the smart air valve reaches its minimum opening or the wind speed variation trend X is observed. i It has decreased to the second wind speed variation range.

4. The self-regulating air volume balance control method for air conditioning units according to claim 1, characterized in that: The trend of static pressure change Y j The size control adjusts the size of the smart air valve corresponding to the room, including: If the static pressure change trend Y j During the first static pressure change range, the corresponding room damper is adjusted to a larger position, and this adjustment is repeated periodically until the smart damper reaches its maximum opening or the static pressure change trend Y is reached. j Increase to the second static pressure variation range; If the static pressure change trend Y j During the second static pressure variation range, the corresponding room damper is not controlled or adjusted. If the static pressure change trend Y j During the third static pressure variation range, the corresponding room damper is adjusted to a smaller position, and this adjustment is repeated periodically until the smart damper reaches its minimum opening or the static pressure variation trend Y is met. j Reduce to the second static pressure variation range.

5. The self-regulating air volume balance control method for air conditioning units according to claim 1, characterized in that: The energy demand of the unit is adjusted according to the trend of the change in the unit's air supply volume Z. out include: If the air volume change trend Z of the unit is within the first air volume change range, the control should increase the unit's energy demand Q according to the first amplitude. out Adjust it periodically until the unit can meet the required Q. out When the maximum value is reached or the air volume change trend of the unit increases to the second air volume change range; If the air volume change trend Z of the unit is within the second air volume change range, the control should increase the unit's energy demand Q according to the second amplitude. out Adjust it periodically until the unit can meet the required Q. out When the maximum value is reached or the air volume change trend of the unit increases to the third air volume change range; If the air volume change trend Z of the unit is within the third air volume change range, the control should be adjusted to increase the unit's energy demand Q according to the third amplitude. out Until the unit can meet Q out Reaching the maximum value; Among them, the third amplitude < the second amplitude < the first amplitude is satisfied.

6. A storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the method of any one of claims 1 to 5 when it is run.

7. A device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the method of any one of claims 1 to 5.

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