TWI401399B - Method of utilizing air conditioner to control thermal comfort level of environment - Google Patents

Description

Method of using an air conditioning system to control the comfort of the environment

The present invention relates to a method for controlling the thermal comfort level of an environment using an air conditioning system including a plurality of different environmental factor adjusting devices, and more particularly to an environmental thermal comfort that can achieve energy saving optimization. Degree control method.

At present, the international standards ISO 7730 and ASHRAE 55 use the predicted mean vote (PMV) indicator and the predicted percent dissatisfied (PPD) to describe and evaluate the thermal comfort level of the environment. The expected average evaluation index represents the hot and cold sensation of the majority of people in the same environment, and the expected dissatisfaction percentage indicator indicates the percentage of people who are dissatisfied with the thermal environment. In addition, please note that the PMV-PPD indicator takes into account human activities. Six factors such as degree, clothing thermal resistance, air temperature, average radiant temperature, air flow rate, and air humidity. Please refer to Figure 1, which is a schematic diagram of the correspondence between the expected average evaluation index and the expected dissatisfaction percentage indicator.

In the current building, the thermal comfort control system of most indoor environments is mainly adjusted for the current ambient temperature or humidity, without considering the comprehensive evaluation of thermal comfort. Since there is no comprehensive consideration of the overall assessment of thermal comfort, some other factors that affect the thermal comfort are not taken into account, so it is possible that the air temperature has been adjusted to the desired temperature, but since it is not considered The influence of air flow speed and air humidity makes the current environment feel uncomfortable.

In addition, with regard to the conventional thermal comfort control system, since only a single factor (such as temperature or humidity) is taken into consideration, the improvement of the single air-conditioning system can only be performed only for the EER, and the improvement of the dehumidification system can only be directed to the EF. Come on. Therefore, in general, the use of conventional thermal comfort control systems requires more energy consumption.

In view of the above, it is an object of the present invention to provide a method for controlling the thermal comfort of an environment using an air conditioning system including a plurality of different environmental factor adjusting devices to solve the above problems.

In accordance with the scope of the present invention, a method of controlling the thermal comfort of an environment using an air conditioning system is disclosed, wherein the air conditioning system includes a plurality of different environmental factor adjustment devices, and the method includes: determining whether Entering a power saving mode; when entering the power saving mode, performing the following steps: (a) determining whether an input signal is received; (b) when receiving the input signal, generating a target expected average according to the input signal (predicted mean vote (PMV) value; (c) detecting a plurality of environmental factors of the current environment to generate an expected average evaluation value as a current thermal comfort detection value; (d) an expected average evaluation based on the target And comparing a value of the current thermal comfort detection value to obtain a plurality of energy efficiency indicators (PMV-EER) values corresponding to the plurality of adjustment devices; (e) determining which of the plurality of environmental factor adjustment devices has The maximum energy efficiency indicator value, and selected to perform an adjustment operation of the thermal comfort of the environment; (f) calculating the environment in which the adjustment operation is performed a subsequent expected average evaluation value to update the current thermal comfort detection value; (g) determining whether the difference between the current thermal comfort detection value and the target expected average evaluation value is less than a predetermined threshold; and h) if the difference between the current thermal comfort detection value and the target expected average evaluation value is not less than the predetermined threshold value, repeat steps (d), (e), (f) and (g) until the The difference between the current thermal comfort detection value and the target expected average evaluation value is less than the predetermined threshold.

Certain terms are used throughout the specification and subsequent claims to refer to a particular device. Those of ordinary skill in the art should understand that a hardware manufacturer may refer to the same device by a different noun. The scope of this specification and the subsequent patent application do not use the difference in name as the means of distinguishing devices, but the difference in function of the device as the criterion for distinguishing, and further, in the entire specification and subsequent claims The word "included" is an open term and should be interpreted as "including but not limited to".

Please refer to FIG. 2, which is a flow chart of a method for controlling thermal comfort of an environment using an air conditioning system, wherein the air conditioning system includes a plurality of different environmental factors, in accordance with an embodiment of the present invention. The adjusting device, for example, the plurality of environmental adjusting devices may include a temperature adjusting device, a humidity adjusting device, and an air volume adjusting device. Further, if substantially the same result is obtained, the steps in the process do not necessarily need to be photographed. The order shown in Figure 2 is not necessarily continuous, that is, other steps can be inserted between these steps. An embodiment of the ambient thermal comfort control method of the present invention includes the following steps: Step 100: Start.

Step 110: Decide whether to enter a power saving mode; if not enter the energy saving mode, proceed to step 120; otherwise, proceed to step 130.

Step 120: Enter a traditional air conditioning mode.

Step 130: Determine whether an input signal is received; if the input signal is received, proceed to step 140; otherwise, proceed to step 210.

Step 140: Generate a target expected mean vote (PMV) value according to the input signal.

Step 150: Detect a plurality of environmental factors of the current environment to generate an expected average evaluation value as a current thermal comfort detection value.

Step 160: Obtain a plurality of energy efficiency indicators (PMV-EER) values corresponding to the plurality of adjustment devices according to the difference between the target average evaluation value and the current thermal comfort detection value.

Step 170: Determine which of the plurality of environmental factor adjustment devices has the largest energy efficiency indicator value, and select it to perform an adjustment operation of the thermal comfort of the environment.

Step 180: Calculate an expected average evaluation value of the environment after performing the adjustment operation to update the current thermal comfort detection value.

Step 190: Determine whether the difference between the current thermal comfort detection value and the target expected average evaluation value is less than a predetermined threshold; if the difference between the current thermal comfort detection value and the target expected average evaluation value is not If the threshold value is less than the predetermined threshold, step 160 is performed again; otherwise, step 130 is performed again.

Step 200: End.

When the plurality of environmental adjustment devices include a temperature adjustment device, a humidity adjustment device, and an air volume adjustment device, in step 130, the input signal includes a temperature adjustment signal, a humidity adjustment signal, or a wind speed adjustment signal. And in step 150, the plurality of environmental factors include temperature, humidity, and air flow rate.

In step 160, the energy efficiency indicator (PMV-EER) value is defined as how much the unit energy consumed can be improved for PMV, that is, PMV-EER = ΔPMV / Δp . In addition, in step 190, the predetermined threshold may be set to be no more than 0.01 or not more than 0.5. However, it should be noted that the above-described embodiments are merely illustrative of the present invention, and are not limitations of the present invention. .

Regarding the PMV-EER calculation method of the air-conditioning equipment, the ΔT is obtained first, and the corresponding energy consumption condition can be calculated by the EER by the following method.

t : operating time (hr)

△ T : temperature variation (°C)

C _p : specific specific heat (kcal/g × ° C)

ρ : air density (g/m ³ )

V : air volume (air bolume (m ³ ))

C _cap : cooling capacity (kcal/hr)

EER : energy efficiency ratio (kcal/w×hr)

Regarding the PMV-EER calculation method of the dehumidification equipment, first obtain Δh, and then calculate the corresponding energy consumption condition by EF by the following method.

t : operating time (hr)

△ h : relative humidity variation (%)

ρ _w,max : saturated humidity (g/m ³ )

V : air volume (m ³ )

H _cap : Humidity capacity (g/hr)

EF : energy factor ((g/hr)/w)

Regarding the PMV-EER calculation method of the air blowing device, first obtain Δv, and then calculate the corresponding energy consumption condition by FP by the following method.

t : operating time (hr)

△ v : air velocity variation (m/s)

V _a : air flow through area (m ² )

A _cap : blowing capacity (m ³ /s)

AR _cap : air blowing through the area (blowing air through arca capacity (m ³ /s))

FP: fan power (fan power (kw))

For example, in an environment where the temperature is 30 degrees Celsius and the humidity is 80%, when a user is directed to an air conditioning system having the method of the present invention (where the air conditioning system includes a temperature adjustment device and a humidity adjustment device) When a temperature adjustment signal with a temperature of 25 degrees Celsius is input, the air conditioning system generates a target expected average evaluation value according to the temperature adjustment signal, and detects a plurality of environmental factors of the current environment to generate an expected average evaluation value as A current thermal comfort detection value. Then, according to the target expected average evaluation value and the current thermal comfort detection value Calculating a value of the energy efficiency index of the temperature adjustment device and an energy efficiency indicator value of the humidity adjustment device, and determining whether the temperature adjustment device and the humidity adjustment device have the maximum energy efficiency index value, and then selecting the same An adjustment operation of the thermal comfort of the environment, for example, the air conditioning system may first adjust the temperature to 27 degrees Celsius, and then adjust the humidity to 50% to reach a temperature of 25 degrees Celsius with the temperature input by the user. The same or similar expected average evaluation values, and only a small amount of energy is required to accomplish the above objectives.

In summary, the method disclosed by the present invention can utilize an air conditioning system to improve the thermal comfort of the environment and at the same time reduce the energy consumption of the air conditioning system.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100~200‧‧‧Steps

Figure 1 is a schematic diagram of the correspondence between expected average evaluation indicators and expected dissatisfaction percentage indicators.

2 is a flow diagram of a method of controlling the thermal comfort of an environment using an air conditioning system in accordance with an embodiment of the present invention.

100~200. . . step

Claims (5)

A method for controlling an environment's thermal comfort level using an air conditioning system, the air conditioning system including a plurality of different environmental factor adjustment devices, the method comprising: determining whether to enter an energy saving mode; In the energy-saving mode, the following steps are performed: (a) generating a target expected mean vote (PMV) value based on an input signal; (b) detecting a plurality of environmental factors of the current environment to generate an expected average evaluation. The value is taken as a current thermal comfort detection value; (c) each time the difference between the expected average evaluation value of the target and the current thermal comfort detection value and the energy consumption condition corresponding to each environmental factor adjustment device is obtained. An energy efficiency indicator (PMV-EER) value corresponding to an environmental factor adjustment device; (d) determining which of the plurality of environmental factor adjustment devices has the largest energy efficiency indicator value, and selecting the thermal comfort of the environment An adjustment operation of the degree; (e) calculating an expected average evaluation value of the environment after performing the adjustment operation to update the current thermal comfort Detecting a value; (f) determining whether a difference between the current thermal comfort detection value and the target expected average evaluation value is less than a predetermined threshold; and (g) if the current thermal comfort detection value and the target If the difference between the expected average evaluation values is not less than the predetermined critical value, then step (c) is repeated. (d), (e), and (f) until the difference between the current thermal comfort detection value and the target expected average evaluation value is less than the predetermined threshold. The method of claim 1, wherein the plurality of environmental adjustment devices comprise a temperature adjustment device, a humidity adjustment device, and an air velocity adjustment device, and the plurality of environmental factors include temperature, humidity, and air flow velocity. . The method of claim 2, wherein the input signal comprises a temperature adjustment signal, a humidity adjustment signal or a wind speed adjustment signal. The method of claim 1, further comprising: (h) if the difference between the current thermal comfort detection value and the target expected average evaluation value is less than the predetermined threshold value, determining whether there is Receiving another input signal; (i) repeating steps (a), (b), (c), (d), (e), and (f) if another input signal is received. (j) If no other input signal is received, the operation ends. The method of claim 1, wherein the predetermined threshold is no more than 0.01.