CN203792817U - Intelligent condensation and frosting preventing glass - Google Patents

Abstract

The utility model discloses an intelligent anti-condensation and frosting glass, comprising: a first glass plate, one side of the first glass plate has an ITO film; and a second glass plate; the first glass plate has an ITO film One side of the film is bonded to the second glass plate through a PVC film; the ITO film is divided into a plurality of independent ring-wrapped open ring regions. The intelligent anti-condensation and frosting glass of the utility model controls the heating process according to the analysis results, and reduces the cooling load of low-temperature display cabinets and freezers while ensuring defogging and defrosting.

Description

An intelligent anti-condensation and frosting glass

technical field

The utility model relates to the field of glass manufacturing, in particular to an intelligent anti-condensation frosting glass.

Background technique

Due to the low temperature of the outer surface of the cabinet doors of low-temperature display cabinets and freezers, it is easy to fog or even frost in humid environments such as supermarkets and canteens, which affects the display effect. The temperature of the outer surface of the glass can be increased by electrically heating the glass to prevent condensation and frost. At present, the electric heating glass can be realized by heating wire and conductive film coating, as described in the patent CN99113594. However, the existence of the heating wire will affect the line of sight, resulting in a decrease in the transparency of the display cabinet door; patent 201220506470.1 uses an ITO-coated conductive film, but it heats the entire glass surface, but in reality, due to the faster heat transfer at the glass edge of the cabinet door, the temperature is relatively Lower, it is easy to condense and frost, so the overall heating will inevitably lead to a decrease in efficiency and conflict with the cooling effect.

Utility model content

The purpose of the utility model is to provide an intelligent anti-condensation and frosting glass. The glass has the characteristics of zoned heating, high permeability, and good heat insulation performance. Through intelligent analysis, the temperature and dew point of the outer surface of the glass can be accurately judged, so that it can be accurately and timely Control the glass heating process, improve heating efficiency and avoid unnecessary energy consumption.

The purpose of this utility model and its technical solution are to adopt the following technical solutions to achieve.

An intelligent anti-condensation and frosting glass proposed by the utility model includes:

A first glass plate, one side of the first glass plate has an ITO film;

Also included: a second glass pane;

The first glass plate has one side of the ITO film bonded together with the second glass plate through PVC film;

The ITO film is divided into a plurality of independent ring-shaped open ring regions.

For the smart anti-condensation and frosting glass described above, the ITO film is removed from the edge of the first glass plate to form a blank area.

For the smart anti-condensation and frosting glass described above, positive and negative electrodes are respectively provided at the ends of each ring-shaped opening.

The intelligent anti-condensation and frosting glass described above also includes a third glass plate, the third glass plate is connected to the second glass plate, and the space between the third glass plate and the second glass plate forms an insulating glass .

For the intelligent anti-condensation and frosting glass described above, there is a spacer aluminum strip between the third glass plate and the second glass plate, the edges are sealed with a sealant, and the spacer aluminum strip is filled with a getter.

The intelligent anti-condensation and frosting glass described above also includes: an intelligent analysis control device; and

a first thermocouple, a second thermocouple, and a third thermocouple;

The first thermocouple is connected to the intelligent control analysis device for measuring the ambient temperature and transmitting the ambient temperature signal to the intelligent control analysis device;

The second thermocouple is arranged on the side coated with the ITO film of the first glass plate, and the second thermocouple is connected to the intelligent control analysis device for measuring the temperature of the heating surface and sending the temperature signal of the heating surface sent to the intelligent control analysis device;

The third thermocouple is connected to the intelligent control analysis device for measuring the refrigeration temperature and transmitting the refrigeration temperature signal to the intelligent control analysis device;

The intelligent analysis control device is connected with the first thermocouple, the second thermocouple and the third thermocouple, and controls the heating of the ITO film according to the temperature measured by the first thermocouple, the second thermocouple and the third thermocouple.

The above intelligent anti-condensation and frosting glass also includes: a humidity sensor connected to the intelligent control analysis device for measuring the relative humidity of the environment and sending the environmental humidity signal to the intelligent control analysis device .

For the intelligent anti-condensation and frosting glass described above, the intelligent analysis control device is composed of a heat balance analysis module, a dew point analysis module, a heating control analysis module and a power supply control module;

The heat balance analysis module is connected to the first thermocouple, the second thermocouple and the third thermocouple, and collects temperature information through the first thermocouple, the second thermocouple and the third thermocouple to obtain the outer surface of the first glass plate temperature;

The dew point analysis module is connected to a humidity sensor, and the humidity sensor detects the relative humidity of the environment, and the dew point analysis module processes the signal received from the humidity sensor to obtain the environmental dew point temperature;

The heating control analysis module is connected to the heat balance analysis module and the dew point analysis module, and controls the power supply control module through the received external surface temperature and dew point temperature;

The power control module is connected to the heating analysis control module, and turns on or off the power supply of the ITO film partitions that need to be heated according to the received signal from the heating analysis control module.

For the intelligent anti-condensation and frosting glass described above, the heating control analysis module adopts PID control mode to control the heating process.

For the intelligent anti-condensation and frosting glass described above, the ITO film is formed by magnetron sputtering.

Compared with the prior art, the utility model has the beneficial effects:

1. The intelligent anti-condensation, frosting and defogging of the utility model adopts electric heating coated glass for annular partition heating, which not only makes the glass have excellent light transmittance, but also improves the heating efficiency of the glass edge;

2. The intelligent analysis and control device is adopted, which can analyze the temperature of the outer surface of the glass and the dew point temperature according to environmental changes, and control the heating process, which can reduce unnecessary energy consumption while ensuring timely anti-condensation and frosting;

3. The utility model adopts a sandwich hollow structure, which has good heat insulation and safety performance. Under the same environment, the dew point of the outer surface of the glass is increased, and the possibility of dew and frost is reduced.

The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with accompanying drawings. back.

Description of drawings

Fig. 1 is a structural schematic diagram of the intelligent anti-condensation frosting glass of the present invention;

Fig. 2 is a partition schematic diagram of the electric heating glass film of the present invention;

Fig. 3 is the flow chart of functional module in the intelligent analysis control device of the present invention;

Figure 4 is a schematic diagram of temperature and corresponding water saturation vapor pressure.

In the picture:

1-1 first glass plate; 1-2 ITO film; 1-3 PVC film; 1-4 second glass plate;

1-5 interval aluminum strips; 1-6 sealant; 1-7 third glass plate;

2-1 Transparent conductive film heating area; 2-2 Blank area for film removal; 2-3 Electrode;

3-1 the first thermocouple; 3-2 the second thermocouple; 3-3 the third thermocouple;

4-1 Heat balance analysis module; 4-2 Dew point analysis module; 4-3 Heating control analysis module;

4-4 power control module;

5-1 Humidity sensor.

Detailed ways

In order to further explain the technical means and effects of the utility model to achieve the predetermined utility model purpose, the following is a specific implementation of an intelligent anti-condensation and frosting glass proposed according to the utility model in combination with the accompanying drawings and preferred embodiments. Mode, structure, feature and effect thereof are as follows in detail. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

As shown in Figure 1, a kind of intelligent anti-condensation and frosting glass proposed by the utility model includes:

The first glass plate 1-1, one side of the first glass plate 1-1 has an ITO film 1-2;

Also includes: a second glass plate 1-4;

The first glass plate 1-1 has one side of the ITO film 1-2 bonded together with the second glass plate 1-4 through the PVC film 1-3;

The ITO film 1-2 is divided into a plurality of open annular regions surrounded by independent rings.

An intelligent anti-condensation and frosting glass of the utility model, the ITO film 1-2 is divided into a plurality of independent ring-shaped open ring areas, the utility model adopts the ring partition method for heating, and the laser cutting film technology is used for partitioning , The size of the partition is designed according to the area and size of the cabinet door, and the circular partition method is adopted, so that the area prone to frost on the edge can be heated separately, improving the heating effectiveness and effectively reducing power consumption.

As shown in Figure 2, in the intelligent anti-condensation and frosting glass of the present utility model, the edge of the first glass plate 1-1 forms a blank area by removing the ITO film from the film; The film removal treatment is carried out at the edge to achieve the purpose of preventing leakage.

As shown in Figure 2, the intelligent anti-condensation and frosting glass of the present invention has a positive electrode and a negative electrode respectively at the end of each opening ring area; The copper electrodes 2-3 are welded with conductive silver paste in each thin film area, and positive and negative electrodes are respectively provided at the ends of each open ring area.

As shown in Figure 2, the intelligent anti-condensation and frosting glass of the present invention, the intelligent anti-condensation and frosting glass in this embodiment is provided with four open annular areas, and the two ends of each open annular area are respectively positive and negative. The electrodes are A1, A2 positive and negative electrodes, B1, B2 positive and negative electrodes, C1, C2 positive and negative electrodes, and D1, D2 positive and negative electrodes, in order to achieve the purpose of zone heating.

As shown in Figure 1, the intelligent anti-condensation and frosting glass of the present invention also includes a third glass plate 1-7, the third glass plate 1-7 is connected with the second glass plate 1-4, the third glass plate 1 Hollow glass is formed between -7 and the second glass plate 1-4.

As shown in Figure 1, in the intelligent anti-condensation and frosting glass of the present invention, an interval aluminum strip 1-5 is arranged between the third glass plate 1-7 and the second glass plate 1-4, and the edge passes through the sealant 1-5. 6. It is sealed, and the spacer aluminum strips 1-5 are filled with getters.

As shown in Figure 1, a kind of intelligent anti-condensation and frosting glass of the present invention consists of a first glass plate 1-1 coated with an ITO film 1-2 through a PVB film 1-3 and a second glass plate 1-4. The laminated glass is formed under the condition of high temperature and high pressure (1.3MPa, 135°C), and the safety of the glass is improved through glass lamination, which protects the ITO film and prevents the risk of leakage during the heating process; The sealant 1-6, the spacer aluminum strip 1-5 filled with getter and the third glass plate 1-7 form an insulating glass, which improves the heat insulation performance of the glass, increases the temperature of the outer surface of the glass, and is comparable to the monolithic glass. Compared with the same cooling conditions, the possibility of condensation and frost is reduced.

The intelligent anti-condensation and frosting glass of the present invention also includes an intelligent analysis control device, a first thermocouple 3-1, a second thermocouple 3-2 and a third thermocouple 3-3;

The first thermocouple 3-1 is connected to the intelligent control analysis device for measuring the ambient temperature and transmitting the ambient temperature signal to the intelligent control analysis device;

The second thermocouple 3-2 is arranged on the one side coated with the ITO film 1-2 of the first glass plate 1-1, and the second thermocouple 3-2 is connected with an intelligent control analysis device for measuring the temperature of the heating surface and The temperature signal of the heating surface is transmitted to the intelligent control analysis device;

The third thermocouple 3-3 is connected to the intelligent control analysis device for measuring the cooling temperature and transmitting the cooling temperature signal to the intelligent control analysis device.

The intelligent analysis control device is connected with the first thermocouple, the second thermocouple and the third thermocouple, and controls the heating of the ITO film according to the temperature measured by the first thermocouple, the second thermocouple and the third thermocouple.

The intelligent analysis control device connects the first thermocouple 3-1, the second thermocouple 3-2 and the third thermocouple 3-3, according to the first thermocouple 3-1, the second thermocouple 3-2 and the third thermocouple 3-3 The measured temperature controls the heating of the ITO film.

The intelligent anti-condensation and frosting glass of the present invention also includes: a humidity sensor 5-1 connected to an intelligent control analysis device for measuring the relative humidity of the environment and transmitting the environmental humidity signal to the intelligent control analysis device .

The intelligent anti-condensation and frosting glass of the utility model, the intelligent analysis control device is composed of a heat balance analysis module 4-1, a dew point analysis module 4-2, a heating control analysis module 4-3 and a power supply control module 4-4;

The heat balance analysis module 4-1 is connected with the first thermocouple 3-1, the second thermocouple 3-2 and the third thermocouple 3-3, through the first thermocouple 3-1, the second thermocouple 3-2 and the third Thermocouple 3-3 collects temperature information to obtain the outer surface temperature of the first glass plate;

The dew point analysis module 4-2 is connected to the humidity sensor 5-1, and the humidity sensor 5-1 detects the relative humidity of the environment, and the dew point analysis module 4-2 processes the signal received from the humidity sensor to obtain the ambient dew point temperature;

The heating control analysis module 4-3 is connected to the heat balance analysis module 4-2 and the dew point analysis module 4-3, and controls the power supply control module 4-4 through the received external surface temperature and dew point temperature;

The power control module 4-4 is connected to the heating analysis control module 4-3, and turns on or off the power supply of the ITO film partitions to be heated according to the received signal from the heating analysis control module 4-3.

In the intelligent anti-condensation and frosting glass of the utility model, the heating control analysis module adopts the PID control mode to carry out the heating control process.

The intelligent anti-condensation and frosting glass of the utility model is made of an ITO transparent conductive heating film plated by a magnetron sputtering method. The utility model adopts the magnetron sputtering method for film coating, which uses an external magnetic field to capture electrons, prolongs and constrains the movement path of electrons, improves the ionization rate, and increases the film coating rate.

Figure 3 shows the functional modules and work flow of the intelligent anti-condensation and frosting device. The device has three temperature thermocouples, which respectively measure the ambient temperature Te, the heating surface temperature Tg, and the cooling temperature Ti. The thermocouple 1-5; set the environmental heat transfer coefficient He and the heat transfer coefficient Hi in the refrigerator according to the use environment and type of the refrigerator. Under normal conditions, the indoor environment heat transfer coefficient is in the range of 2 to 4W/(m2·K) According to the JGJ151 thermal engineering calculation regulations for building doors, windows and curtain walls, it is recommended that the indoor heat transfer coefficient He be 3.6W/(m2 K) in winter, and the indoor heat transfer coefficient He be 2.5W/(m2 K) in summer, and the heat transfer coefficient Hi in the refrigeration cabinet In the range of 0.6-1.2W/(m2·K), generally 0.8W/(m2·K), after setting the heat transfer coefficient, the glass heat balance analysis module will , using the following heat balance equations to analyze the glass outer surface temperature. Since the edge of the glass is direct heat conduction, the thermal resistance is the smallest, and it is the easiest to fog, so the heat transfer balance equation is established based on the most severe conditions at the beginning.

q ₁ =q ₂

q ₁ =h _e *(T _e -T _ft )+J _e -J _ft

q ₂ ＝h _g *(T _ft -T _b )

h _g ＝1/(3*d _g /λ _g +d _al /λ _al )

q ₃ ＝h _i *(T _b -T _i )+J _b -J _i

J _ft ＝r*J _e +e*σ*T _ft ⁴

J _b ＝e*σ*T _b ⁴ +r*J _i

q ₂ =q ₃

J _e =σ*T _e ⁴

J _i =σ*T _i ⁴

In the establishment of the heat balance equation, the laminated glass and the single piece combined by the aluminum spacer are taken as a whole. In the equation, the heat transfer q1 from the external environment to the glass, the heat transfer q2 through the glass as a whole, and the heat transfer q3 from the glass to the inside, The radiation intensity of the outermost surface of the glass Jft, the temperature Tft, and the side of the glass near the freezer are Jb, Tb; Je, Ji represent the radiation intensity of the environment and inside the freezer, calculated from the measured temperatures Te and Ti according to the Stephen-Boltzmann law, σ is Stephen-Boltzmann constant, e is the emissivity of the surface, the emissivity of glass is 0.84, r=1-e=0.16; dg is the thickness of the glass, dal is the thickness of the spacer, λg is the thermal conductivity of the glass (1W /(m K)), λal is the thermal conductivity of the spacer (210W/(m K)), and the influence of the film is ignored due to the small thickness of the film.

As an example, set the environmental heat transfer coefficient he as 2.5W/(m2 K), the heat transfer coefficient hi in the refrigerator is 0.8W/(m2 K), the measured ambient temperature Te is 28°C, and the temperature in the refrigerator Ti is -18°C, both coated glass and monolithic glass are 3mm, and the thickness of the aluminum spacer is 6mm. Through the above equation, the outermost temperature Tft of the glass is 14.5°C, that is, the outermost temperature Tge of the glass is obtained through the analysis of the thermal balance analysis module. It is 14.5°C.

The temperature and corresponding water saturated vapor pressure are shown in Table 1 and Figure 4.

Table 1 Temperature and corresponding water saturated vapor pressure

If under the above example conditions, the measured ambient relative humidity is 55%, and the dew point Td from the dew point analysis module to the ambient temperature of 28°C and the relative humidity of 55% is 18°C, the analysis principle is:

It can be seen from Table 1 or Figure 4 that the saturated vapor pressure at 28°C is 0.00378MPa. When the relative humidity is 55%, according to the definition of relative humidity, the water vapor pressure in this environment is 0.00378×55%=0.002079MPa. When such water vapor When the pressure becomes the saturated vapor pressure at a certain temperature, the temperature is the dew point temperature. It can be seen from Table 1 or Figure 4 that the saturated vapor pressure of 0.002079MPa at a temperature of 18°C means that when the surface temperature of the glass is ≤18°C, the Condensation.

Under the conditions of this example, the heating control analysis module judges that Tge<Td and starts heating immediately, monitors the temperature Tg of the heating surface in real time, analyzes the temperature Tge of the outer surface of the glass, and conducts the heating process by the PID control method. The analysis principle of the temperature Tge of the outer surface of the glass is: In heat balance, the heat transferred by the heating surface to the outer surface is equal to the heat transferred by the outer surface, and the heat transferred by the outer surface includes convection and radiation heat transfer, which is expressed by the following heat balance equation:

(T _g -T _ge )/t _g -(T _ge -T _e )*h _e -J _ft +J _e ＝0

J _ft -e*σ*T _ft ⁴ -r*J _e ＝0

Same as the above Jb, 0 represents the ambient radiation intensity, calculated from the measured temperature Te according to the Stephen-Boltzmann law, σ is the Stephen-Boltzmann constant, e is the emissivity of the surface, the emissivity of the glass is 0.84, r =1-e=0.16; tgv is the thickness of the glass. Tge≥18°C is required. According to the above equation, the temperature of the heating surface can be analyzed to be Tg≥18.5°C. According to the heating control and 1.1 times insurance factor design, the heating will be stopped after the temperature Tg of the heating surface reaches 20.4°C and maintained for 10 minutes.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any Those who are familiar with this profession, without departing from the scope of the technical solution of the present utility model, may use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the technical solutions of the utility model do not depart from the scope of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (10)

1. an intelligent anti-condensation frosting glass, is characterized in that, comprising:

The first glass plate, the one side of described the first glass plate has ITO film;

Also comprise: the second glass plate;

The one side that described the first glass plate has ITO film is bonded together by PVC film and described the second glass plate;

Described ITO film is divided into multiple independently ring sets open annular region together.

2. intelligent anti-condensation frosting glass according to claim 1, is characterized in that,

The edge of described the first glass plate removes ITO film by membrane removal and forms clear area.

3. intelligent anti-condensation frosting glass according to claim 1, is characterized in that,

The end in described each open annular region is respectively equipped with positive and negative electrode.

4. intelligent anti-condensation frosting glass according to claim 1, is characterized in that,

Also comprise, the 3rd glass plate, described the 3rd glass plate is connected with the second glass plate, and between described the 3rd glass plate and the second glass plate, hollow forms double glazing.

5. intelligent anti-condensation frosting glass according to claim 4, is characterized in that,

Between described the 3rd glass plate and the second glass plate, be provided with interval aluminum strip, edge, by sealant sealing, is filled with getter in the aluminum strip of interval.

6. intelligent anti-condensation frosting glass according to claim 1, is characterized in that,

Also comprise: intellectual analysis control device; And

The first thermocouple, the second thermocouple and three thermocouple;

Described the first thermocouple connects described Based Intelligent Control analytical equipment, also this ambient temperature signal is sent to described Based Intelligent Control analytical equipment for measures ambient temperature;

Described the second thermocouple is arranged at the one side that is coated with ITO film of described the first glass plate, and described the second thermocouple connects described Based Intelligent Control analytical equipment, for measuring the temperature of heating surface and this heating surface temperature signal being sent to described Based Intelligent Control analytical equipment;

Described three thermocouple connects described Based Intelligent Control analytical equipment, for measuring cryogenic temperature and this cryogenic temperature signal being sent to described Based Intelligent Control analytical equipment;

Described intellectual analysis control device connects described the first thermocouple, the second thermocouple and three thermocouple, according to the first thermocouple, the second thermocouple and the heating of three thermocouple measured temperature control ITO film.

7. intelligent anti-condensation frosting glass according to claim 6, is characterized in that,

Also comprise: humidity sensor, described humidity sensor connects described Based Intelligent Control analytical equipment, also this ambient humidity signal is sent to described Based Intelligent Control analytical equipment for measurement environment relative humidity.

8. intelligent anti-condensation frosting glass according to claim 7, is characterized in that,

Described intellectual analysis control device is made up of thermal equilibrium analysis module, dew point analysis module, heating control analysis module and energy supply control module;

Described thermal equilibrium analysis module connects described the first thermocouple, the second thermocouple and three thermocouple, draws the hull-skin temperature of the first glass plate by the first thermocouple, the second thermocouple and three thermocouple collecting temperature information;

Described dew point analysis module, connects humidity sensor, described humidity sensor testing environment relative humidity, and described dew point analysis module obtains environment dew-point temperature to the signal processing that is received from humidity sensor;

Described heating control analysis module connects described thermal equilibrium analysis module and described dew point analysis module, by the hull-skin temperature and the dew-point temperature control energy supply control module that receive;

Described energy supply control module connects described thermal analysis control module, is switched on or switched off the power supply of the ITO film subregion that needs heating according to the signal of the thermal analysis control module receiving.

9. intelligent anti-condensation frosting glass according to claim 8, is characterized in that,

Described heating control analysis module adopts pid control mode to control heating process.

10. according to the intelligent anti-condensation frosting glass described in claim 1-9 any one claim, it is characterized in that,

Described ITO film adopts magnetically controlled sputter method to be coated with and forms.