US 2026/0118006 A1 · Sunshade System Capable of Independently Adjusting Thermal Insulation Performance and Sunshade Performance and Control Method Therefor

Abstract

Disclosed in the present invention are a sunshade system with independently adjustable thermal insulation and shading performance and a control method therefor. The sunshade system with independently adjustable thermal insulation and shading performance mainly consists of a glazing system, a window frame, a sunshade mechanism, and a monitoring mechanism. A solar radiation sensor and an outdoor air temperature sensor in the monitoring mechanism are used to collect outdoor solar radiation data and air temperature data in real time, and the data is transmitted to a central processing unit; and on the basis of a sun-shading area ratio prediction model and according to measured values from the solar radiation sensor and the temperature sensor, the central processing unit extracts geometric parameters of an external window to determine the unfolding degree of a roll film. The present disclosure guarantees year-round thermal environment and day lighting effect in the interior of a building, and reduces the air conditioning and heating energy consumption of the building.

A control method for a sunshade system with independently adjustable thermal insulation and shading performance, characterized by comprising the following steps:

S1, a central processing unit (CPU) determines the operation duration based on a timer, obtains the current system time from a clock module, and compares it with a preset working time;
S2, if the operating time of the system is within the working time, the CPU performs the following operations:
it receives signals from a solar radiation sensor and a temperature sensor, extracts geometric parameters of an external window according to measured values from the solar radiation sensor and the temperature sensor, invokes a sunshade area ratio prediction model to calculate a target roll film unfolding degree (H1) for the corresponding time, and adjusts the actual roll film unfolding degree according to the target roll film unfolding degree (H1);
S3, if the operating time of the system is not within the working time, the CPU determines whether the operating time is within the heating season:
if the operating time is within the heating season, thermal insulation of a building at night is required, and the CPU outputs a signal to a motor shaft to fully lower a roll film, thereby forming a stable adjustable air layer between the roll film and glass to enhance thermal resistance for thermal insulation;
if the operating time is not within the heating season, heat dissipation of the building at night is required, and the CPU outputs a signal to the motor shaft to control the roll film to fully roll up, thereby reducing thermal resistance for heat dissipation;
and
S4, the timer repeats steps S1 to S3 at preset intervals;
a process for constructing the sunshade area ratio prediction model is as follows:
A1, establishing a typical building model corresponding to each thermal zone in energy consumption simulation software, and inputting relevant meteorological data;
A2, configuring the sunshade system with independently adjustable thermal insulation and shading performance for external windows and curtain walls of the typical building model, generating N sunshade area ratios (SR) by varying parameters of the sunshade system, and performing batch energy consumption simulations on N working conditions;
A3, automatically acquiring, via a scripting tool, year-round hourly building energy consumption (E), indoor daylight glare index (DGI) and outdoor environmental parameters, which are generated after simulations of the N working conditions, and screening optimal hourly SR values according to evaluation indexes that the DGI is less than 19 and E is the minimum;
and
A4, for each thermal zone, based on 8,760 sets of data screened, establishing a mathematical relationship between SR and outdoor air temperature (Ta) by nonlinear regression, to obtain sunshade area ratio prediction models for different thermal zones;
outdoor air synthetic temperature (Tsa) is expressed as a function of outdoor solar radiation (I) and the outdoor air temperature (Ta), as follows:
T
s
⁢
a
=
T
a
+
ρ
s
⁢
I
α
e
,
_
wherein ρs is the absorption coefficient of the outer surface of the building envelope to solar radiant heat, and αe is the overall heat transfer coefficient of the outer surface of the building envelope, in W/(m2·K)
the sunshade area ratio prediction model takes Tsa as the independent variable and it has different expressions in different thermal zones;
in the mild zone, the expression is:
SR
=
(
0
.
1
×
T
s
⁢
a
2
-
1
.
6
⁢
1
×
T
s
⁢
a
-
0
.
4
⁢
2
)
×
1
⁢
0
-
2
_
in the hot summer and warm winter zone, the expression is:
SR
≥
70
⁢
%
⁢
(
T
s
⁢
a
≥
34
⁢
°
⁢
C
.
)
,
_
in the hot summer and cold winter zone, the expression is:
S
⁢
R
=
(
0
.
7
⁢
4
×
T
s
⁢
a
2
-
6
.
7
⁢
1
×
T
s
⁢
a
+
3
.
3
⁢
3
)
×
1
⁢
0
-
3
,
_
in the cold zone, when the sunshade system is positioned in the east, south, or west, the expression is:
ln
⁢
SR
=
-
2
.
6
⁢
7
+
0
.
0
⁢
9
×
T
s
⁢
a
-
7
.
2
×
1
⁢
0
-
4
×
T
s
⁢
a
2
,
_
and in the cold zone, when the sunshade system is positioned in the north, the expression is:
S
⁢
R
=
⁢
{
100
⁢
%
⁢
(
T
sa
≤
-
3
⁢
°
⁢
C
.
)
0
⁢
%
⁢
(
-
3
⁢
°
⁢
C
.
<
T
sa
≤
0
⁢
°
⁢
C
.
)
.
_

221 more elements

Sunshade System Capable of Independently Adjusting Thermal Insulation Performance and Sunshade Performance and Control Method Therefor

Life of this patent

Sunshade System Capable of Independently Adjusting Thermal Insulation Performance and Sunshade Performance and Control Method Therefor

Life of this patent

Abstract

Claims14