CN101737900A - Method and device for feedback control of air quantity of central air conditioner - Google Patents

Method and device for feedback control of air quantity of central air conditioner Download PDF

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CN101737900A
CN101737900A CN200910155841A CN200910155841A CN101737900A CN 101737900 A CN101737900 A CN 101737900A CN 200910155841 A CN200910155841 A CN 200910155841A CN 200910155841 A CN200910155841 A CN 200910155841A CN 101737900 A CN101737900 A CN 101737900A
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air volume
temperature
air quantity
air
control module
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CN101737900B (en
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杜荣法
张健
马吉富
廉晨龙
翟德虎
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Wolong Electric Drive Group Co Ltd
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Abstract

中央空调的风量反馈控制方法与装置，涉及中央空调的控制技术。现中央空调风量过大，能源浪费，忽冷忽热，室内的舒适度差。本发明包括1)检测步骤，通过风量检测装置检测风机盘管出口处风量，通过温度检测装置测量室内温度；2)风量计算步骤，将实际温度与设定温度进行比较得出两者差值，并根据温度差值计算所需风量；3)风量补偿步骤，将实际风量与所需风量进行比较，得出两者差值，并根据风量差值计算风机电机的转速，对风量进行补偿；4)调整步骤，根据计算所得的风机电机转速进行调整；回至步骤1)循环。本发明利用PI调节单元，调整电机转速，借此来调整输出风量，实现温度和风量的双闭环控制，达到提高舒适度，节能的效果。

An air volume feedback control method and device for a central air conditioner relate to the control technology of the central air conditioner. The air volume of the central air conditioner is too large at present, energy is wasted, and the indoor comfort is poor. The present invention includes 1) a detection step of detecting the air volume at the outlet of the fan coil unit through an air volume detection device, and measuring the indoor temperature through a temperature detection device; 2) an air volume calculation step of comparing the actual temperature with the set temperature to obtain the difference between the two, And calculate the required air volume according to the temperature difference; 3) Air volume compensation step, compare the actual air volume with the required air volume, obtain the difference between the two, and calculate the speed of the fan motor according to the air volume difference, and compensate the air volume; 4 ) adjustment step, adjust according to the calculated fan motor speed; return to step 1) cycle. The invention uses the PI adjustment unit to adjust the motor speed, thereby adjusting the output air volume, realizing the double closed-loop control of temperature and air volume, and achieving the effects of improving comfort and saving energy.

Description

中央空调的风量反馈控制方法与装置 Air volume feedback control method and device for central air conditioner

【技术领域】【Technical field】

本发明涉及中央空调的控制技术，特别是关于中央空调的风量反馈的控制方法与装置。The invention relates to a control technology of a central air conditioner, in particular to a control method and device for air volume feedback of the central air conditioner.

【背景技术】【Background technique】

目前风机盘管为中央空调常采用的一种风量传输的装置，通常安装在房间的天花板上，产生一定温度的气流来调节房间里的温度，提供一种舒适的环境温度。At present, fan coil unit is a kind of air volume transmission device often used in central air conditioners. It is usually installed on the ceiling of the room to generate airflow of a certain temperature to adjust the temperature in the room and provide a comfortable ambient temperature.

图1即显示现有的一组风机盘管控制系统的示意图结构形态，其基本结构包括控制器，风机，盘管，截止阀，温度传感器。Figure 1 shows the schematic structural form of a group of existing fan coil control systems. The basic structure includes a controller, a fan, a coil, a shut-off valve, and a temperature sensor.

基本上，中央空调中主要是根据房间温度的设定，快速调整出合适的风量来改变室内温度，但如果风量忽大忽小，会影响房间的舒适度，同时如果风量控制的不合适，也会浪费很多能源。Basically, the central air conditioner mainly adjusts the appropriate air volume quickly to change the indoor temperature according to the setting of the room temperature, but if the air volume fluctuates, it will affect the comfort of the room. A lot of energy will be wasted.

为达到调节室内温度的常用的解决方法是控制电机的几档转速来调整出几档的风量。这种做法的缺点在于，实际出风量不清楚，只能根据电机转速调节来调节风量，而风道又根据实际情况的布管各有不同，这就导致一样的电机转速，出风量是各不相同，只能通过调最大转速来调整室内温度，导致风量过大，能源浪费，忽冷忽热，室内的舒适度明显下降。The commonly used solution for reaching to regulate indoor temperature is to control several gears of the motor to adjust the air volume of several gears. The disadvantage of this method is that the actual air volume is not clear, and the air volume can only be adjusted according to the motor speed adjustment, and the air ducts are different according to the actual situation, which leads to the same motor speed, and the air volume is different. Similarly, the indoor temperature can only be adjusted by adjusting the maximum speed, resulting in excessive air volume, energy waste, hot and cold, and a significant decrease in indoor comfort.

【发明内容】【Content of invention】

本发明要解决的技术问题和提出的技术任务是克服现有技术方案缺点，提供一种中央空调的风量反馈控制方法与装置，以达到风量的快速调整，持续稳定的工作的目的。为此，本发明采取以下技术方案：The technical problem to be solved and the technical task proposed by the present invention are to overcome the shortcomings of the existing technical solutions, and provide a central air-conditioning air volume feedback control method and device, so as to achieve the purpose of rapid adjustment of air volume and continuous and stable work. For this reason, the present invention takes the following technical solutions:

中央空调的风量反馈控制方法，所述中央空调包括风机电机、盘管，其特征在于它包括以下步骤：An air volume feedback control method for a central air conditioner, the central air conditioner includes a fan motor and a coil, and is characterized in that it includes the following steps:

1)检测步骤，通过安装在盘管出口处的风量检测装置检测风机盘管出口处风量，通过温度检测装置测量室内温度；1) The detection step is to detect the air volume at the outlet of the fan coil unit through the air volume detection device installed at the outlet of the coil unit, and measure the indoor temperature through the temperature detection device;

2)风量计算步骤，将检测得到的实际温度与设定温度进行比较得出两者差值，根据温度差值计算所需风量；2) Air volume calculation step, comparing the detected actual temperature with the set temperature to obtain the difference between the two, and calculating the required air volume according to the temperature difference;

3)风量补偿步骤，将检测得到的实际风量与所需风量进行比较，得出两者差值，根据风量差值计算风机电机的转速，对风量进行补偿；3) The air volume compensation step is to compare the detected actual air volume with the required air volume to obtain a difference between the two, calculate the speed of the fan motor according to the air volume difference, and compensate the air volume;

4)调整步骤，根据计算所得的风机电机转速进行调整，回至步骤1)循环。4) The adjustment step is to adjust according to the calculated fan motor speed, and return to step 1) to circulate.

利用风量检测装置，并以风量作为反馈控制参数，以采用闭环控制方式取代马达转速通过经验值的开环控制方式，实现控制中央空调风机盘管的出风量快速稳定达到控制范围内的目的，避免风量过大、能源浪费、忽冷忽热的情况发生。Using the air volume detection device and using the air volume as the feedback control parameter, the closed-loop control mode is used to replace the open-loop control mode in which the motor speed passes the empirical value, so as to achieve the purpose of controlling the air volume of the central air-conditioning fan coil quickly and stably within the control range, avoiding The air volume is too large, the energy is wasted, and the situation of hot and cold happens.

作为对上述技术方案的进一步完善和补充，本发明还包括以下附加技术特征：As a further improvement and supplement to the above technical solution, the present invention also includes the following additional technical features:

由风量PI控制单元根据风量差值计算风机电机的调整转速。The adjusted rotational speed of the fan motor is calculated by the air volume PI control unit according to the air volume difference.

由温度PI控制单元根据温度差值计算所需风量。The required air volume is calculated by the temperature PI control unit according to the temperature difference.

风机电机由与风量PI控制单元连接的风机驱动单元驱动，达到风量PI控制单元控制风机电机转速的目的。The fan motor is driven by the fan drive unit connected with the air volume PI control unit, so that the air volume PI control unit can control the fan motor speed.

中央空调的风量反馈装置，所述的中央空调包括风机电机、盘管及控制器，其特征在于：风量反馈装置包括An air volume feedback device for a central air conditioner, the central air conditioner includes a fan motor, a coil and a controller, and is characterized in that the air volume feedback device includes

设于盘管出口用于检测风量的风量检测装置；An air volume detection device installed at the outlet of the coil to detect the air volume;

用于检测室内温度的温度检测装置；A temperature detection device for detecting indoor temperature;

用于根据预设温度和房间实际温度之差来计算所需风量值的温度PI控制单元；A temperature PI control unit for calculating the required air volume value based on the difference between the preset temperature and the actual room temperature;

用于根据风量检测装置得到的实际风量值和温度PI控制单元计算得到的所需风量值之差来计算风机电机的转速控制值的风量PI控制单元。利用PI调节单元，调整电机转速，借此来调整输出风量，实现温度和风量的双闭环控制，达到提高舒适度，节能的效果。An air volume PI control unit for calculating the speed control value of the fan motor according to the difference between the actual air volume value obtained by the air volume detection device and the required air volume value calculated by the temperature PI control unit. The PI adjustment unit is used to adjust the motor speed, thereby adjusting the output air volume, realizing the double closed-loop control of temperature and air volume, and achieving the effect of improving comfort and saving energy.

所述的温度PI控制单元及风量PI控制单元均设于控制器中。采用软件实现PI控制，降低成本。Both the temperature PI control unit and the air volume PI control unit are set in the controller. Use software to realize PI control and reduce costs.

所述的风量PI控制单元通过一设于控制器中的风机驱动单元控制风机电机转速。风机电机为无极调速电机，风量PI控制单元实时调节风量，达到稳、准、快的控制风量目的。The air volume PI control unit controls the speed of the fan motor through a fan drive unit installed in the controller. The fan motor is a stepless speed regulating motor, and the air volume PI control unit adjusts the air volume in real time to achieve the purpose of controlling the air volume stably, accurately and quickly.

所述的温度、风量检测装置信号输出信号通过连接线反馈到相应的PI控制单元。实现闭环控制。The signal output signal of the temperature and air volume detection device is fed back to the corresponding PI control unit through the connection line. Realize closed-loop control.

有益效果：Beneficial effect:

利用PI调节单元，调整电机转速，借此来调整输出风量，实现温度和风量的双闭环控制，达到提高舒适度，节能的效果。The PI adjustment unit is used to adjust the motor speed, thereby adjusting the output air volume, realizing the double closed-loop control of temperature and air volume, and achieving the effect of improving comfort and saving energy.

【附图说明】【Description of drawings】

图1是现有的风机盘管结构示意图；Fig. 1 is a schematic diagram of an existing fan coil unit structure;

图2是本发明应用结构示意图；Fig. 2 is a schematic diagram of the application structure of the present invention;

图3是本发明的原理结构示意图；Fig. 3 is a schematic structural diagram of the present invention;

图4A是采用现有技术的风量控制曲线图；Fig. 4A is the air volume control curve diagram using the prior art;

图4B是采用本发明的风量控制曲线图。Fig. 4B is a graph of air volume control using the present invention.

【具体实施方式】【Detailed ways】

以下结合说明书附图对本发明的技术方案做进一步的详细说明。The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

如图2、3所示，中央空调的风量反馈装置，中央空调包括风机电机、盘管及控制器，风量反馈装置包括设于盘管出口用于检测风量的风量检测装置、用于检测室内温度的温度检测装置、用于根据预设温度和房间实际温度之差来计算所需风量值的温度PI控制单元、用于根据风量检测装置得到的实际风量值和温度PI控制单元计算得到的所需风量值之差来计算风机电机的转速控制值的风量PI控制单元。其中温度PI控制单元及风量PI控制单元均设于控制器中。风量PI控制单元通过一设于控制器中的风机驱动单元控制风机电机转速。温度、风量检测装置信号输出信号通过连接线反馈到相应的PI控制单元。As shown in Figures 2 and 3, the air volume feedback device of the central air conditioner includes a fan motor, a coil and a controller. The temperature detection device, the temperature PI control unit used to calculate the required air volume value according to the difference between the preset temperature and the actual temperature of the room, and the required air volume value calculated according to the actual air volume value obtained by the air volume detection device and the temperature PI control unit The difference between the air volume values is used to calculate the air volume PI control unit of the speed control value of the fan motor. Wherein the temperature PI control unit and the air volume PI control unit are both set in the controller. The air volume PI control unit controls the speed of the fan motor through a fan drive unit installed in the controller. The signal output signal of the temperature and air volume detection device is fed back to the corresponding PI control unit through the connection line.

中央空调的风量反馈控制方法步骤为：The steps of the air volume feedback control method of the central air conditioner are as follows:

1)检测步骤，通过安装在盘管出口处的风量检测装置检测风机盘管出口处风量，通过温度检测装置测量室内温度；1) The detection step is to detect the air volume at the outlet of the fan coil unit through the air volume detection device installed at the outlet of the coil unit, and measure the indoor temperature through the temperature detection device;

2)风量计算步骤，将检测得到的实际温度与设定温度进行比较得出两者差值，温度PI控制单元根据温度差值计算所需风量；2) The air volume calculation step is to compare the detected actual temperature with the set temperature to obtain the difference between the two, and the temperature PI control unit calculates the required air volume according to the temperature difference;

3)风量补偿步骤，将检测得到的实际风量与所需风量进行比较，得出两者差值，风量PI控制单元根据风量差值计算风机电机的转速，对风量进行补偿；3) The air volume compensation step is to compare the detected actual air volume with the required air volume to obtain a difference between the two, and the air volume PI control unit calculates the speed of the fan motor according to the air volume difference to compensate the air volume;

4)调整步骤，电机驱动单元根据计算所得的风机电机转速进行调整；回至步骤1)循环。4) In the adjustment step, the motor drive unit adjusts according to the calculated rotational speed of the fan motor; return to step 1) and cycle.

图4A、4B是特性曲线图，对比显示现有控制方法与本发明控制方法的风量控制的曲线，图4A风量只存在大、中、小三档，达到温度范围风机电机停转或切换高、中、慢转速，使得风量时有时无、时大时小，温度波动大，而在图4B中，风量不断随温度调整，在快速达到室温后，风量和温度波动小，室内基本保持恒温，风量变化小、有效提高舒适度。Figures 4A and 4B are characteristic curve diagrams, which compare and display the curves of the air volume control of the existing control method and the control method of the present invention. The air volume in Figure 4A only has three levels of large, medium, and small, and the fan motor stops or switches between high and medium when the temperature range is reached. , slow speed, so that the air volume is sometimes absent, sometimes large and sometimes small, and the temperature fluctuates greatly. In Figure 4B, the air volume is constantly adjusted with the temperature. After quickly reaching the room temperature, the air volume and temperature fluctuations are small, and the indoor temperature is basically kept constant. The air volume changes Small, effectively improve comfort.

Claims (8)

1. the air quantity feedback of central air-conditioning, described central air-conditioning comprises blower motor, coil pipe, it is characterized in that control method may further comprise the steps:
1) detects step, detect fan coil exit air quantity, measure indoor temperature by temperature-detecting device by the air quantity checkout gear that is installed in the coil pipe exit;
2) Wind Coverage Calculation step, actual temperature that detection is obtained and design temperature compare and draw both differences, and calculate institute's required airflow according to temperature gap;
3) air quantity compensation process, actual air volume and institute's required airflow that detection is obtained compare, and draw both differences, and calculate the rotating speed of blower motor according to the air quantity difference, and air quantity is compensated;
4) set-up procedure is adjusted according to the blower motor rotating speed that calculates gained; Be back to the step 1) circulation.
2. the air quantity feedback of central air-conditioning according to claim 1 is characterized in that: the adjustment rotating speed that is calculated blower motor by air quantity PI control module according to the air quantity difference.
3. the air quantity feedback of central air-conditioning according to claim 1 is characterized in that: calculate institute's required airflow by temperature PI control module according to temperature gap.
4. the air quantity feedback of central air-conditioning according to claim 2 is characterized in that: blower motor reaches the purpose of air quantity PI control module control blower motor rotating speed by the blower fan drive unit drives that is connected with air quantity PI control module.
5. the air quantity feedback device of central air-conditioning, described central air-conditioning comprises blower motor, coil pipe and controller, it is characterized in that: the air quantity feedback device comprises
Be located at the air quantity checkout gear that the coil pipe outlet is used to detect air quantity;
Be used to detect the temperature-detecting device of indoor temperature;
Be used for calculating the temperature PI control module of required airflow value according to the difference of preset temperature and room actual temperature;
The difference that is used for the required airflow value that the actual air volume value that obtains according to the air quantity checkout gear and temperature PI control module calculate is calculated the air quantity PI control module of the rotating speed controlling value of blower motor.
6. the air quantity feed back control system of central air-conditioning according to claim 5, it is characterized in that: described temperature PI control module and air quantity PI control module all are located in the controller.
7. the air quantity feedback and the device of central air-conditioning according to claim 6 is characterized in that: described air quantity PI control module is by a blower fan driver element control blower motor rotating speed of being located in the controller.
8. the air quantity feed back control system of central air-conditioning according to claim 7, it is characterized in that: described temperature, air quantity checkout gear signal output signal feed back to corresponding PI control module by connecting line.
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