Device for testing double-glazed windows for tightness

Abstract

The utility model relates to the field of testing double-glazed windows for tightness.The essence of the utility model: a device for testing double-glazed windows for tightness, including a cooling unit, a contact unit for the cooling unit with the surface of the double-glazed window and a sensor for the surface temperature of the double-glazed window during the cooling process, equipped with a sensor for the temperature of the working environment of the tests, a control unit and a timer for the contact time of the surface of the double-glazed window with the cooling unit, which is made in the form of a Peltier element with an adjustable power supply unit, wherein the cold side of the Peltier element faces the surface of the double-glazed window, and on the hot side there is a heat sink unit with a power regulator connected to it, the contact time timer is connected to the adjustable power supply unit, the sensors for the surface temperature of the double-glazed window during the cooling process and the working environment of the tests are connected to the input of the control unit, the outputs of which are connected to the timer, to the adjustable power supply unit of the Peltier element and to the power regulator of the heat sink unit.The contact point between the cold side of the Peltier element and the surface of the insulating glass unit is designed as a stand with a window and clamping clips at its corners. The technical result consists of increasing the efficiency of cold transfer to the surface of the insulating glass unit by ensuring the formation of localized and controlled temperature differences on the glass surface, namely, the creation of a stable and controlled temperature gradient on a section of the insulating glass unit surface. This allows for the reliability of insulating glass units to be assessed under real-life operating conditions, for example, during sudden changes in ambient temperature. 5 fig.

Description

[0001] The utility model relates to the field of testing double-glazed windows for tightness.

[0002] Tightness testing of insulating glass units is an important stage of their production and certification, as tightness is a critical factor in assessing the performance and durability of the structure. Testing verifies the insulating glass unit's ability to resist the penetration of moisture, air, and other substances that could negatively impact its performance. A loss of tightness leads to changes in the gas content in the insulating glass unit chamber, which, in turn, affects its thermal insulation properties and can lead to condensation.

[0003] There are known double-glazed windows, on one of the inner surfaces of which an indicator substance in the form of silica gels or synthetic zeolites is applied, which reacts to the presence of atmospheric air and changes color when the pressure of the rarefied gas in the gap between the glasses increases (RU No. 2382162, 2008, US 4848138 A, 1989).

[0004] The indicator substances used in the specified devices do not have a sufficiently high sensitivity to air components and cannot serve as reliable indicators for small changes in the partial pressure of noble gases and water vapor.

[0005] A device is known for determining the tightness of double-glazed windows, containing upper and lower loading screws, a spring, a clock-type indicator, sliding supports, a thermometer and a clock-type indicator (GOST 24866-2014, Glued double-glazed windows, Moscow, Standartinform, 2015, pp. 12-13).

[0006] The method for determining airtightness using a known device involves measuring the change in the deflection of the loaded glass unit as the pressure in its internal cavity changes in the event of a leak. The glass unit is placed on supports, and using a loading screw and spring, the top glass is loaded until its deflection corresponds to a specified value, while the bottom glass is loaded until its deflection corresponds to the deflection of the top glass. The glass unit is held for a specified time, and its airtightness is determined using the indicator readings.

[0007] In this case, stands are used, the elements of which are loading screws and a spring, designed to act on the geometric center (the intersection point of the diagonals) of the glass unit, as well as indicators, the readings of which serve as the basis for making a decision on the tightness of the glass unit (samples are considered to have passed the test if the indicator reading for all samples does not exceed 0.02 mm).

[0008] The disadvantage of the known device is the duration and technical complexity of the study.

[0009] Of the known devices, the closest in technical essence and the achieved result to the proposed one is a device for determining the tightness of double-glazed windows, based on dew point control, including a cooling unit made in the form of a micro-refrigerator or a container with cooling liquid, a contact unit with the double-glazed window in the form of a contact plate and a temperature sensor (GOST 24866-2014, Glued double-glazed windows, Moscow, Standartinform, 2015, pp. 13-16).

[0010] The essence of the method for determining the dew point temperature is to cool a section of the glass of a double-glazed window and then check for the appearance of condensation on the inner surface of the glass in this section.

[0011] The cleaned glass surface and the contact plate are moistened with a swab soaked in acetone, then a micro-cooler or a container filled with acetone or isopropyl alcohol with the addition of solid carbon dioxide or liquefied gas is pressed onto the moistened area of ​​the glass and ensure their tight contact.

[0012] Set the temperature and time of the test depending on the thickness of the glass sheet in the glass unit and the climate option for manufacturing the glass unit.

[0013] After the specified time, turn on the light source and visually check for condensation (frost) on the inner surface of the cooled section of the glass.

[0014] The disadvantages of the known solution include:

[0015] Insufficiently high reliability of the determination of tightness, due to the tests being conducted in the laboratory, and not in real operating conditions of double-glazed windows

[0016] The need for access to solid carbon dioxide or running water to cool the micro-refrigerator;

[0017] cannot be used on curved glass units (in case of using a micro-refrigerator);

[0018] High labor and energy costs for regular factory or laboratory quality control.

[0019] The technical problem solved by this utility model is to ensure the mobility of the device, expand the range of glass units tested from flat shapes to curved ones, in particular, bent ones, and reduce the labor intensity and resource intensity of testing.

[0020] The said technical problem is solved in that a device for testing double-glazed windows for tightness, including a cooling unit, a contacting unit for the cooling unit with the surface of the double-glazed window and a sensor for the surface temperature of the double-glazed window during the cooling process, according to the utility model, is provided with a sensor for the temperature of the working environment of the tests, a control unit and a timer for the contact time of the surface of the double-glazed window with the cooling unit, which is made in the form of a Peltier element with an adjustable power supply, wherein the cold side of the Peltier element faces the surface of the double-glazed window, and on the hot side there is a heat sink unit with a power regulator connected to it, the contact time timer is connected to the adjustable power supply, the sensors for the surface temperature of the double-glazed window during the cooling process and the working environment of the tests are connected to the inputs of the control unit, the outputs of which are connected to the timer,to the adjustable power supply of the Peltier element and to the power regulator of the heat sink unit,

[0021] In a preferred embodiment of the device, the contact unit of the cold side of the Peltier element with the surface of the glass unit is made in the form of a tripod with a window and clamping fixing clips at its corners.

[0022] The technical result achieved consists of increasing the efficiency of cold transfer to the surface of the glass unit by ensuring the formation of local and controlled temperature differences on the surface of the glass, namely the creation of a stable and controlled temperature gradient on the surface of the glass unit, which makes it possible to evaluate the reliability of the glass units under real operating conditions, for example, during sudden changes in the ambient temperature.

[0023] The essence of the utility model is explained by drawings, where

[0024] Fig. 1 shows the general view of the device,

[0025] Fig. 2 shows the circuit diagram of the device,

[0026] Fig. 3 shows a tripod with clamping fixing clips,

[0027] Fig. 4, 5 show side views of the device in the working position during testing.

[0028] The proposed device for testing double-glazed windows for tightness consists of a cooling unit 1, which is made in the form of a Peltier element, the cold side 2 of which faces the surface of the double-glazed window 3, and on the hot side 4 a heat-dissipation unit 5 with a power regulator 6 is located.

[0029] A sensor for the current temperature 7 during the cooling process is installed on the surface of the glass unit 3, and a sensor for the temperature of the working test environment 8 is located in the area where ambient air enters the heat removal unit 5.

[0030] Temperature sensors 7 and 8 are connected to control unit 9, the outputs of which are connected to power regulator 6 of heat sink unit 5, to contact timer 10 and to adjustable power supply 11 of Peltier element 5.

[0031] The heat sink unit 5 can be made, for example, in the form of a radiator with a fan.

[0032] Control unit 9 is equipped with a display.

[0033] The contact of the cold side 2 of the Peltier element with the surface of the glass unit 3 is carried out with the help of a contact unit made in the form of a tripod 12 with a window 13, to which the cold side 2 of the Peltier element faces, and clamping fixing clips 14 at its corners.

[0034] The device operates as follows.

[0035] A support 12 with clamping clips 14 is installed on the glass unit's surface in the center. The glass unit can be positioned horizontally or vertically. The area inside the frame is wiped with acetone. Next, a cooling unit 1 with a heat sink assembly 5 is installed on support 14.

[0036] Operation is initiated by pressing the "Start" button on the display of control unit 9. Automatic settings mode is then selected, or the mode can be changed manually if other input values ​​are required. The insulating glass testing device is controlled by control unit 9.

[0037] The control actions are generated by control unit 9 based on pre-set functional dependencies between the cooling modes, including the cooling temperature and cooling holding time, and the parameters of the glass unit being tested - glass thickness and glass unit type.

[0038] During the tests, based on the current information about the temperature on the cooled side of the glass unit, the temperature in the test zone measured by sensors 7 and 8, and the parametric characteristics of the glass unit being tested, signals are generated to control the timer 10, the adjustable power supply 11, and the power regulator 6 of the heat sink unit 5.

[0039] After starting, the cooling process begins, the mode of which is set by the adjustable power supply 11.

[0040] During the test, depending on the temperature in the test area and the temperature on the cold side of the glass unit 3, the power regulator 6 changes the heat removal mode from the hot side 4 of the Peltier element 2, carried out by the heat removal unit 5.

[0041] After the set cooling time set by timer 10, which is usually 15-20 minutes, timer 10 turns off the power supply 11 of Peltier Element 1.

[0042] To evaluate the results, the clamps are released and the device is detached from the tripod. Next, experts visually assess the presence or absence of traces of fogging inside the glass unit, after wiping the surface with acetone.

[0043] When using the device, testing can be performed with the glass unit in any position. No running water is required. The device can be powered from either a household electrical outlet or a battery. The device's size, mounting configuration, and weight allow testing on samples of any shape and curvature, and on various glass surface areas.

[0044] A high degree of automation of testing and recording of results is achieved by using a built-in automated control system with a communication function with external devices for transmitting measurement results.

[0045] The device provides automatic saving and transmission of test results, all information about the characteristics of the sample, operating mode and environmental conditions are displayed on the display and saved along with the test results.

[0046] The implementation of the control algorithm described above makes it possible to create devices for testing insulating glass units with the simulation of different test conditions by simulating various operating modes of the insulating glass unit, including extreme temperatures and their cyclic changes.

Claims

1. A device for testing double-glazed windows for tightness, comprising a cooling unit, a contact unit for the cooling unit with the surface of the double-glazed window, and a sensor for the temperature of the surface of the double-glazed window during the cooling process, characterized in that it is equipped with a sensor for the temperature of the working environment of the tests, a control unit, and a timer for the contact time of the surface of the double-glazed window with the cooling unit, which is made in the form of a Peltier element with an adjustable power supply unit, wherein the cold side of the Peltier element faces the surface of the double-glazed window, and on the hot side there is a heat sink unit with a power regulator connected to it, the contact time timer is connected to the adjustable power supply unit, the sensors for the temperature of the surface of the double-glazed window during the cooling process and the working environment of the tests are connected to the input of the control unit, the outputs of which are connected to the timer, to the adjustable power supply unit of the Peltier element and to the power regulator of the heat sink unit.

2. The device according to paragraph 1, characterized in that the contact unit of the cold side of the Peltier element with the surface of the glass unit is made in the form of a tripod with a window and clamping fixing clips at its corners.

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