THERMAL BLIND CURTAIN DRIVEN BY TEMPERATURE DIFFERENCE

Abstract

The invention relates to the structural design and control system of Venetian blinds, specifically to a blind technology involving the automatic positioning of the inclination angles of the blind slats via a DC motor. In this context, the invention encompasses motor-controlled Venetian blind systems, angular adjustment mechanisms based on heat transfer, and the entirety of electromechanical control structures considered within the scope of window covering technologies.

Description

1 TARIFF THERMAL BLIND CURTAIN DRIVEN BY TEMPERATURE DIFFERENCE TECHNICAL FIELD The invention relates to the structural design and control system of Venetian blinds, 5 Specifically, the tilt angles of the curtain slats are automatically adjusted via a DC motor. It relates to a curtain technology concerning the positioning of the motor. In this context, the invention concerns a motor. controlled blind systems, angular adjustment mechanisms based on heat transfer, and Electromechanical control evaluated within the scope of window coating technologies. It encompasses all of their structures. 10 PREVIOUS TECHNIQUE The primary function of curtains is to prevent the interior from being seen from the outside through shading. The purpose is to block and control the entry of sunlight. However, the current curtain... Heat loss and gain are often overlooked in their designs. Venetian blinds, 15 Consisting of successive parallel lanes, and the lane slope can be adjusted manually or by remote control. These are systems where the angles of the slats can be adjusted. However, existing automated curtains have heat-sensitive strip angles. It does not take into account its effect on transfer, it is only visual for user comfort. It provides control. Venetian blinds have one side resting against the window and the other free-standing along its length. 20 In this case, they consist of successive parallel strips. The strips have different internal and external environments depending on the glass. The effect of location on heat transfer for different temperatures is shown in Figures 1a-1d. In the proposed invention, the undesirable (a) positioning of the strips under hot external conditions (b) (c) location of the strips in cold outdoor conditions (d) A mechanism has been developed to bring it to this position. Here, the lane positions are 25 The reason for the change is the slope-difference temperature relationship between the lanes. The function of the resulting semi-enclosed environment is to support the buoyancy force. The goal is to reduce heat transfer by converting it into a resistive function. Studies in the literature on heat transfer by natural convection, The effects of wall positioning and boundary conditions on heat transfer were revealed. 30 Davis (1983), Moukalled & Acharya (1997) and Moukalled & Darwish (2007) Research conducted by [author's name] shows the environments that support and counteract buoyancy. The study explained the effects of positioning on heat transfer. In light of this information, 2 The angles of inclination of Venetian blind slats similarly regulate the heat transfer between the interior and exterior environments. It appears that it can either increase or decrease transport. With current Venetian blinds, the slats move towards the glass in hot outdoor conditions. Incorrect positioning allows heated air on the glass surface to be transferred to the interior. It strengthens and increases heat gain. In cold outdoor conditions, however, 5 The reverse positioning of the strips allows the warm air from the interior to reach the cold glass surface. This hinders heat transfer, leading to heat loss. In contrast, the strips need to be properly aligned. By positioning them at certain angles, this convection can be weakened and heat transfer can be reduced. It can be reduced. In the study conducted by Zeng et al. (2023), the lane slope was also reduced. Numerical and experimental studies have shown that angles (-90°, 0° and 90°) affect heat transfer by 20%. It has been shown as such. Patent databases contain a limited number of inventions related to curtain systems, and these are not directly related. an invention concerning the slope of Venetian blind slats and its effect on heat transfer No such encounters have been reported. Richards (2002) on light cutting with metallized curtain lining, Willgingham (2017) focused on thermal curtain design for spacecraft. 15 Therefore, a solution focused on the slope of the blind slats to reduce heat loss and gain. It is not included in the current technology. Willingham, A. L, 2017. Cubesat form factor thermal control louvres, US 20170o88294A1 20 Davis, GDV 1983. Natural convection of air in a square cavity; a bench mark numerical solutions, International Journal for Numerical Methods in Fluids, 3, 249-264. Richards J. J, 2002. Blackout and thermal drapery and drapery lining and method 25 Therefore, US 2002O122949A1. Moukalled, F. and Acharya, S. 1997. Buoyancy-induced heat transfer in partially divided trapezoidal cavities, Numerical Heat Transfer, Part A, 32, 787-810. Moukalled, F and Darwish, M. 2007. Buoyancy-induced heat transfer in a trapezoidal enclosure with offset baffles, Numerical Heat Transfer, Part A, 52, 337-355. 3 Zheng, K, Y. Yuan, Y. Tao, S. Tan, Z and Jiang, F. 2023. Natural convection heat transfer characteristics of louver surface at small installation distance, Journal of Building Engineering 72, 106544. PURPOSE OF THE INVENTION 5 Although the invention is used in the known applications of Venetian blinds, Unlike existing systems, it only provides light control and privacy. It will have not only its function as a heat source, but also heat gain and heat insulation functions. They have been developed. Venetian blinds consist of horizontal strips parallel to each other, and the strips Light intensity and image obstruction are achieved by adjusting the tilt. 10 However, in current systems, the strips have an increasing or decreasing slope towards the glass. the positioning has different effects on heat loss and heat gain Despite this knowledge, this fact is not taken into account in curtain designs. In current practices, lane positioning is mostly done manually. Some models also have mechanical adjustment via remote control (automated blinds) 15 However, in these systems, the selection of lane slopes is only possible if the image is... The aim is to prevent heat loss and gain through technical means. No optimization is performed. Therefore, heat transfer in conventional Venetian blinds is not optimized. There is no functional structure in place to reduce this. The invention is designed to remedy the aforementioned technical deficiencies. It has been developed. In the proposed system, the Venetian blind slats reflect the interior view. In addition to preventing heat loss, it will also contribute to reducing heat gain and loss. in the figure, the slope decreases by 45° towards the colder side in all cases relative to the glass surface. It is positioned. This positioning process involves adjusting the temperature difference between the indoor and outdoor environments. through an automation mechanism driven by taking advantage of the difference 25 This is done by moving the strips from a hot environment to a cold environment. By tilting, it weakens heat transfer that occurs through natural convection and reduces heat transfer. is being reduced. With this invention, Venetian blinds can be adjusted manually or by remote control. It functions without requiring any additional tools, solely through an automatic drive mechanism based on temperature difference. 30 This allows the curtain to provide thermal insulation in both summer / winter and day / night conditions. From this perspective, it becomes functional; in addition to light and image control, it contributes to energy efficiency. It offers a new structure that provides this. 4 LIST OF FIGURES Figure 1a. Undesirable positioning of the strips under hot outdoor conditions. Figure 1b. Desired position of the strips under hot outdoor conditions. Figure 1c. Undesirable positioning of the strips under cold outdoor conditions. Figure 1d. Desired position of the strips under cold outdoor conditions 5 Figure 2. Detailed view of the blind slats. Figure 3. Detailed view of a drum gear. Figure 4 shows a detailed view of the double-quarter drive gear. Figure 5. Detailed view of the key drive drum. Figure 6. Detailed view of a three-quarter key disc. 10 Figure 7. Detailed view of the circuit board. Figure 8. Detailed view of the mechanism housing. Figure 9. Mechanism with drum gear and counter-drum gear belonging to the curtain assembly. This is a perspective view of the assembled double-quarter drive gear belonging to the group. Figure 10. Blind slats, slat cords, drum gear, counter 15 belonging to the curtain assembly. Front mounting of the double-quarter drive gear belonging to the drum gear and mechanism group. It is the appearance. Figure 11. Double-quarter drive gear, key drive, belonging to the mechanism group. drum, key chain, DC motor and three-quarter key disc of the drive unit This is an assembled perspective view. 20 Figure 12. Key drive drum of the mechanism group and drive group. keychain, DC motor, circuit wires, battery, three-quarter key disc, with This is a schematic view of the assembled thermistors. Figure 13. Drum gear and counter-drum gear mechanism belonging to the curtain assembly. 25 circuit boards belonging to the box-circuit board assembly, along with mechanism and drive assemblies. This is a perspective view of the assembly. It also shows the thermistors belonging to the drive unit. Location is shown. Figure 14. Circuit board and mechanism box assembly. This is a perspective view of the assembly of the mechanism box components. Figure 15a – 15c. Drive group Position 1 (15a), Position 2 (15b) and Position 30 It shows the working principle corresponding to 3 (15c). Figure 16a – 16c. Position 1 (16a), Position 2 (16b) corresponding to the drive group. and Location 3 (16c) shows lane orientations. The corresponding numbers in the figures are: 1. Venetian blind slats 2. Ribbon ropes 3. Drum gear 4. Counter-rolling gear 5 5. Double-quarter drive gear 6. Key drive drum 7. Keychain 8. DC motor 9. Circuit cables 10 10. Battery 11. Three-quarter key disc 12. Thermistors 13. Circuit board 14. Mechanism box 15 DETAILED DESCRIPTION OF THE INVENTION The invention provides an automated way to reduce heat loss and gain in Venetian blind slats. It relates to a mechanism that enables its positioning. The system includes a curtain group, 20 from mechanism group, drive group and mechanism box-circuit board group These groups work together in an integrated manner to ensure the lanes are in the environment. It moves and stays in the desired direction depending on the temperature difference. It provides. The invention consists of: blind slats (1), slat cords (2), drum gear (3), counter drum gear (4), double-quarter drive gear (5), key drive drum (6), key chain (7), DC motor 25 (8), circuit wires (9), battery (10), three-quarter switch disc (11), thermistors (12), It consists of a circuit board (13) and a mechanism box (14). The curtain assembly consists of blind strips (1), strip cords (2), drum gears (3) and It consists of a counter-rotating gear (4). The blind slats (1) are made of light metal, wood. or plastic-based, which in addition to blocking light and vision, also minimizes heat loss / gain. It is positioned to reduce the ribbon ropes (2) coming from the drum gear (3). It transmits the movement to the blind slats (1). Drum gear (3) and counter drum gear (4) They receive the motion from the double-quarter drive gear (5) and transmit it to the strips via the strip ropes (2). (1) changes the angle by transmitting. The mounting of the blind slats (1) is done through the holes at their ends. 6 They are secured with knots thanks to the ropes (2) that are passed through. Two of the ribbon ropes (2) One of the drum gears (3) is fixed to the other two drum gears (4) (Figure 10). The mechanism group consists of a double-quarter drive gear (5), key drive drum (6), It consists of a key chain (7) and a DC motor (8). The DC motor (8) is both a double-quarter It rotates both the drive gear (5) and the key drive drum (6) at the same time. Double-5 by moving the quarter drive gear (5), the drum gear (3) and the counter drum gear (4) It changes the slope of the strips (1). Key drive drum (6), key chain (7) by turning the three-quarter key disc (11) to open and close the circuit It provides. Figure 11 shows the assembly of this group. Drive unit, circuit cables (9), battery (10), three-quarter switch disc (11) and 10 It consists of thermistors (12) (Figure 12). Thermistors (12) are sensitive to temperature changes. They are two elements, one exposed to the indoor environment (NTCI) and the other to the outdoor environment (NTCD). When any of the thermistors (12) exceeds the threshold temperature, current passes through it. The battery (10) closes the circuit and thus powers the DC motor (8). It provides the energy source. The circuit wires (9) provide electrical energy from the battery (10) 15 It transmits power to the equipment. The circuit board (13) is made by assembling two plastic-based boards in the form of a T-profile. It is obtained and the drive group elements are placed on it. The mechanism The box (14) is in the form of a rectangular prism and it holds the circuit board (13) and on it It houses the mounted drive unit. This allows the system to be protected within a 20-degree range. It operates inside a protective enclosure. As shown in Figures 15-16, the system's operating principle depends on the indoor and outdoor environments. It is based on temperature difference. When the outside temperature rises above 25°C, NTCD The resistance of the thermistor (12) drops and the circuit closes, and the DC motor (8) starts. DC motor (8) It is mounted on a shaft and works in conjunction with this shaft and rotates the shaft clockwise 25° It rotates. This movement is initially transmitted to a double-quarter drive gear, also mounted on the same shaft. (5), from double-quarter drive gear (5) to drum gear (3) and counter drum gear (4) is transferred. As a result of all these movements, the blind slats (1) are shown in Figure 15a and Figure The path shown in 15b goes from position 1 to position 2. Simultaneously, the key drive drum (6) three-quarter key disc (11), diameter of bill key drive (6) 30 Since it is ½ of the drum diameter, the conductive surface of the disc on the NTCD arm is rotated 180°. A gap is created between the line and the circuit, and the DC motor (8) stops and the blind strips open. (1) is fixed (Figure 16b). At the same time, the key drive drum (6), key chain (7) rotates the three-quarter key disc (11). Three-quarter key 7 When the conductive surface of the disc (11) disconnects from the circuit, the DC motor (8) stops and the blind The strips (1) are fixed. When the indoor temperature rises above 25 °C, the resistance of the NTCI thermistor (12) decreases. because it will fall, current will pass through it and close the circuit and the DC motor (8) It is working. The DC motor (8) rotates the shaft clockwise while the switch 5 is in the same direction. It also rotates the drive drum (6) and the double-quarter drive gear (5). While the drive gear (5) rotates 90°, this time the opposing drum gear (4) rotates counterclockwise. By rotating the same amount, the position of the blind slats (1) is changed from Position 2 given in Figure 15b. It moves to Position 3 as given in Figure 15c. Simultaneously, the key drive drum (6) three-quarter key disc (11), the diameter of the bill is ½ of the diameter of the drum gear (4) 10 Because of this, by rotating it 180°, the conductor of the three-quarter switch disc (11) on the NTCI arm A circuit is opened by forming a circuit between the surface and the line, and the DC motor (8) stops and the blind strips open. (1) is fixed (Figure 16c - Position 3). 20 30

Claims

8 REQUESTS 1. The invention relates to the operation of blind slats (1) depending on the temperature difference between the inside and outside. It is a mechanism that enables automatic positioning; its feature is: - the blind slats (1), slat cords (2), drum gear 5 that make up the curtain group (3) and the opposing drum gear (4); - double-quarter drive gear (5) forming the mechanism group, key chain by turning the three-quarter key disc (11) through (7) to open the circuit The key drive drum (6) that enables closing, the key chain (7) and by operating the double-quarter drive gear (5) drum gear (3) and counter 10 by moving the drum gear (4) the slope of the blind slats (1) DC motor (8) that enables changing; - circuit cables (9) forming the drive group, battery (10), three-quarters key disc (11) and reaching the threshold temperature value in the indoor and outdoor environment The internal 15 allows the DC motor (8) to operate by closing the circuit in this case. thermistors placed in the ambient and external environment (12); - containing the circuit board (13) and the mechanism box (14) It is characteristic. 25

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