CN-122015227-A - Air conditioner and comfort control method and system thereof

CN122015227ACN 122015227 ACN122015227 ACN 122015227ACN-122015227-A

Abstract

The invention provides an air conditioner and a comfort control method and system thereof, and belongs to the technical field of air conditioner control. The method comprises the steps of obtaining a first static pressure value of an air outlet, a second static pressure value of an air outlet, air outlet temperature and relative humidity and surface temperature of the air outlet, determining air duct static pressure loss, determining actual available static pressure of the air outlet according to the air duct static pressure loss and a reference static pressure value, determining an air duct resistance coefficient, dynamically setting a target static pressure, calculating air outlet dew point temperature, judging whether a difference value between the surface temperature of the air outlet and air outlet dew point temperature is smaller than or equal to a first safety threshold value, judging that condensation risk exists if the difference value is smaller than or equal to the first safety threshold value, and adjusting fan rotating speed and water valve opening according to a condensation risk judging result according to the difference value between the actual available static pressure of the air outlet and the target static pressure. According to the invention, the running state is acquired through the multiple sensors, the algorithm is automatically adjusted according to the acquired data, the effects of noise reduction, energy saving and condensation prevention can be effectively realized, and the comfort of the air conditioner is improved.

Inventors

LI TAO
CHEN WANXING
TANG ZHENGQING
CHEN HAIWEI

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (10)

1. An air conditioner comfort control method, characterized by comprising: Acquiring a first static pressure value of an air outlet at the tail end of the air conditioner, a second static pressure value at a diffusing port, the air outlet temperature and relative humidity of the air outlet and the surface temperature of the diffusing port; determining the air duct static pressure loss according to the difference value of the first static pressure value and the second static pressure value, and determining the actual available static pressure of the flow distributing port according to the air duct static pressure loss and a reference static pressure value; determining an air duct resistance coefficient according to the air duct static pressure loss and the current running air quantity, and dynamically setting a target static pressure according to the air duct resistance coefficient; Calculating an air outlet dew point temperature according to the air outlet temperature and the relative humidity, judging whether the difference value between the surface temperature of the air outlet opening and the air outlet dew point temperature is smaller than or equal to a first safety threshold value, and judging that the condensation risk exists if the difference value is smaller than or equal to the first safety threshold value; and according to the static pressure difference between the actual available static pressure of the flow distributing port and the target static pressure, and combining the condensation risk judging result, adjusting the rotating speed of the fan and the opening of the water valve.
2. The air conditioner comfort control method according to claim 1, characterized in that: the determining the air duct resistance coefficient according to the air duct static pressure loss and the current running air quantity comprises the following steps: Calculating the current running air quantity based on a preset formula, wherein the preset formula is that the current running air quantity is equal to the product of the rated air quantity and a proportionality coefficient, and the proportionality coefficient is the ratio of the current rotating speed to the rated rotating speed; and calculating an air duct resistance coefficient according to the ratio of the air duct static pressure loss to the square of the current running air quantity.
3. The air conditioner comfort control method according to claim 1, characterized in that: The dynamically setting the target static pressure according to the air duct resistance coefficient comprises the following steps: The target static pressure is equal to the product of the air duct resistance coefficient and the adjusting coefficient plus a preset basic value, wherein the determining rule of the adjusting coefficient is as follows: when the resistance coefficient of the air duct is smaller than a first resistance coefficient threshold value, a first adjusting coefficient is adopted; When the resistance coefficient of the air duct is larger than or equal to the first resistance coefficient threshold value and smaller than the second resistance coefficient threshold value, adopting a second adjusting coefficient; when the resistance coefficient of the air duct is larger than or equal to the second resistance coefficient threshold value and smaller than the third resistance coefficient threshold value, a third adjusting coefficient is adopted; And when the resistance coefficient of the air duct is larger than or equal to the third resistance coefficient threshold value, adopting a fourth adjusting coefficient.
4. The air conditioner comfort control method according to claim 1, characterized in that: The adjusting of the fan rotating speed and the water valve opening degree comprises the following steps: when the static pressure difference is larger than a second preset threshold value and no condensation risk exists, reducing the rotating speed of the fan according to a first preset regulation model, and regulating the opening of the water valve according to an anti-condensation regulation strategy; when the static pressure difference is larger than a second preset threshold value and the condensation risk exists, reducing the rotating speed of the fan according to the first preset regulation model, and regulating the opening of the water valve according to the second preset regulation model; When the static pressure difference is smaller than or equal to a second preset threshold value and the condensation risk exists, reducing the opening of the water valve according to a second preset regulation model, and regulating the rotating speed of the fan according to a noise reduction regulation strategy; When the static pressure difference is smaller than or equal to a second preset threshold value and no condensation risk exists, maintaining the current fan rotating speed and the water valve opening.
5. The air conditioner comfort control method according to claim 4, wherein: the first preset regulation model is a nonlinear decreasing function of the target rotating speed and the static pressure difference: Multiplying the power of n of the static pressure difference by a fan adjusting coefficient, wherein n is an empirical coefficient, subtracting the product from the initial rotating speed, and obtaining a difference value which is the adjusted target rotating speed.
6. The air conditioner comfort control method according to claim 5, wherein: The second preset regulation model is a logarithmic function of the opening of the target water valve and the static pressure difference: and firstly calculating a natural logarithmic value of the sum of the static pressure difference and 1, multiplying the natural logarithmic value by a water valve adjusting coefficient, and subtracting the product from 1 to obtain a difference value which is the adjusted target water valve opening.
7. The air conditioner comfort control method according to claim 6, wherein: the method further comprises the step of periodically performing a calibration procedure: Operating under standard working conditions, recording current operation data and comparing the current operation data with historical operation data; And correcting the reference static pressure value, the fan adjusting coefficient or the water valve adjusting coefficient according to the change trend of the first static pressure value or the change trend of the air duct resistance coefficient, and generating fault prompting information when the reference static pressure value, the fan adjusting coefficient or the water valve adjusting coefficient exceeds a preset range.
8. The air conditioner comfort control method according to claim 7, wherein: The correcting the reference static pressure value, the fan adjusting coefficient or the water valve adjusting coefficient according to the change trend of the first static pressure value or the change trend of the air duct resistance coefficient comprises the following steps: if the correction is selected according to the change trend of the first static pressure value, the method comprises the following steps: When the attenuation percentage of the first static pressure value is smaller than a first preset attenuation threshold value, carrying out first amplitude correction on the reference static pressure value, and not correcting the fan adjusting coefficient and the water valve adjusting coefficient; when the attenuation percentage of the first static pressure value is larger than or equal to a first preset attenuation threshold value and smaller than a second preset attenuation threshold value, performing second amplitude correction on the reference static pressure value, and performing first amplitude correction on the fan adjusting coefficient and the water valve adjusting coefficient; When the attenuation percentage of the first static pressure value is larger than or equal to a second preset attenuation threshold value, performing third amplitude correction on the reference static pressure value, performing second amplitude correction on the fan adjusting coefficient and the water valve adjusting coefficient, and generating fault prompting information; if the correction is selected according to the variation trend of the air duct resistance coefficient, the method comprises the following steps: When the increase percentage of the air duct resistance coefficient is smaller than a first preset increase threshold value, the reference static pressure value, the fan adjusting coefficient and the water valve adjusting coefficient are not corrected; When the increase percentage of the air duct resistance coefficient is larger than or equal to a first preset increase threshold value and smaller than a second preset increase threshold value, fourth amplitude correction is carried out on the reference static pressure value, and third amplitude correction is carried out on the fan adjusting coefficient and the water valve adjusting coefficient; And when the increase percentage of the air duct resistance coefficient is larger than or equal to a second preset increase threshold value, performing fifth amplitude correction on the reference static pressure value, performing fourth amplitude correction on the fan adjusting coefficient and the water valve adjusting coefficient, and generating fault prompting information.
9. An air conditioning comfort control system for implementing the air conditioning comfort control method according to any one of claims 1 to 8, characterized by comprising: two pressure sensor, temperature and humidity sensor, temperature sensor and control panel, wherein: The two pressure sensors are respectively arranged at an air outlet and a diffusing port at the tail end of the air conditioner and are used for collecting a first static pressure value and a second static pressure value; the temperature and humidity sensor is arranged at the air outlet and is used for collecting the air outlet temperature and the relative humidity; the temperature sensor is arranged on the surface of the diffusing port and is used for collecting the surface temperature of the diffusing port; the control panel is respectively connected with the pressure sensor, the temperature and humidity sensor and the temperature sensor and is used for executing the air conditioner comfort control method according to any one of claims 1 to 8.
10. An air conditioner comprising a fan, a water valve, and an air conditioner comfort control system as set forth in claim 9.

Description

Air conditioner and comfort control method and system thereof Technical Field The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and a comfort control method and system thereof. Background In commercial buildings, the tail end of an air conditioner (such as a fan coil and an air treatment unit) is often complicated in installation environment and various in air duct design, so that the actual operation working condition and the design working condition deviate seriously. In order to ensure the refrigerating effect, a high static pressure fan is generally adopted and a larger static pressure allowance is reserved in design, and meanwhile, equipment is often large in selection, so that the phenomenon of 'big horse-drawn trolley' is caused. The fan can be operated at a high rotating speed for a long time, so that the problems of high noise and high energy consumption are caused, and the condensation of the flow dispersing port is caused by the excessively high wind speed and the excessively low air outlet temperature, so that the building safety and the user experience are influenced. In the prior art, part of air conditioning systems control refrigerating capacity by adjusting the opening of a water valve through temperature feedback, or control the rotating speed of a fan by setting a fixed static pressure value so as to maintain air quantity. However, such control strategies lack the ability to perceive dynamic changes in the actual resistance of the air duct, and cannot be finely and dynamically adjusted according to real-time operating conditions. In addition, the traditional control method generally only uses temperature or pressure as a single control target, so that the energy conservation and consumption reduction are difficult to achieve while the various comfort requirements are met. Disclosure of Invention In order to solve the defects in the prior art, the invention provides an air conditioner and a comfort control method and system thereof. The invention adopts the following technical scheme. A first aspect of the present invention provides an air conditioner comfort control method, including: Acquiring a first static pressure value of an air outlet at the tail end of the air conditioner, a second static pressure value at a diffusing port, the air outlet temperature and relative humidity of the air outlet and the surface temperature of the diffusing port; determining the air duct static pressure loss according to the difference value of the first static pressure value and the second static pressure value, and determining the actual available static pressure of the flow distributing port according to the air duct static pressure loss and a reference static pressure value; determining an air duct resistance coefficient according to the air duct static pressure loss and the current running air quantity, and dynamically setting a target static pressure according to the air duct resistance coefficient; Calculating an air outlet dew point temperature according to the air outlet temperature and the relative humidity, judging whether the difference value between the surface temperature of the air outlet opening and the air outlet dew point temperature is smaller than or equal to a first safety threshold value, and judging that the condensation risk exists if the difference value is smaller than or equal to the first safety threshold value; and according to the static pressure difference between the actual available static pressure of the flow distributing port and the target static pressure, and combining the condensation risk judging result, adjusting the rotating speed of the fan and the opening of the water valve. Optionally, the determining the air duct resistance coefficient according to the air duct static pressure loss and the current running air quantity includes: Calculating the current running air quantity based on a preset formula, wherein the preset formula is that the current running air quantity is equal to the product of the rated air quantity and a proportionality coefficient, and the proportionality coefficient is the ratio of the current rotating speed to the rated rotating speed; and calculating an air duct resistance coefficient according to the ratio of the air duct static pressure loss to the square of the current running air quantity. Optionally, the dynamically setting the target static pressure according to the air duct resistance coefficient includes: The target static pressure is equal to the product of the air duct resistance coefficient and the adjusting coefficient plus a preset basic value, wherein the determining rule of the adjusting coefficient is as follows: when the resistance coefficient of the air duct is smaller than a first resistance coefficient threshold value, a first adjusting coefficient is adopted; When the resistance coefficient of the air duct is larger than or equal to the first resistance coeff