Cooling air cooling system for glass tempering

Abstract

The utility model discloses a cooling air cooling system for glass tempering. The cooling air cooling system comprises a heat exchange air bellow, a primary heat exchanger and a secondary heat exchanger, an input port of the heat exchange air bellow is used for communicating with an output port of the fan, and an output port of the heat exchange air bellow is used for communicating with a cooling air input port of the air grid quenching section; the first-stage heat exchanger and the second-stage heat exchanger are installed in the heat exchange air box, the first-stage heat exchanger is close to an input port of the heat exchange air box, and the second-stage heat exchanger is close to an output port of the heat exchange air box. The temperature of the refrigerant circularly flowing in the second-stage heat exchanger is lower than the room temperature and lower than the temperature of the cooling water circularly flowing in the first-stage heat exchanger; the first-stage heat exchanger and the second-stage heat exchanger are used for exchanging heat with cooling air input into the heat exchange air box and making the temperature of the cooling air output by the heat exchange air box lower than a set temperature threshold value, and the temperature threshold value is not higher than the room temperature. Through heat exchange, the temperature of cooling air output by the heat exchange air box is lower than the room temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of glass tempering equipment, in particular to a cooling air temperature reduction system for glass tempering. Background Art

[0002] In the existing glass tempering technology, the glass to be tempered is heated by a heating furnace to soften the surface of the glass to be tempered, and then the heated glass to be tempered is quenched by the rapid cooling section of the air grille to be tempered, and then the tempered glass is cooled to below 50°C by the cooling section of the air grille, and finally the tempered glass is output to the down-sheet table.

[0003] Since the impeller of the fan that provides cooling air for the rapid cooling section of the air grille rotates fast, the air pressure in the fan is as high as 20,000 Pa, and the frictional force between the air flowing in the fan and the impeller and the inner wall of the fan is large, resulting in the temperature of the air output by the fan being close to 80°C.

[0004] The existing technology uses cooling air with a temperature close to 80°C to quench the glass to be tempered in the rapid cooling section of the air grille. Due to the insufficient cooling capacity of the cooling air, the glass to be tempered needs to move back and forth in the rapid cooling section multiple times to achieve the quenching effect. Therefore, the cooling time of the glass to be tempered in the rapid cooling section is relatively long, and the production efficiency of glass tempering is low. Summary of the Utility Model

[0005] Aiming at the above deficiencies, the purpose of the present utility model is to propose a cooling air temperature reduction system for glass tempering, which solves the problems of insufficient cooling capacity of the cooling air and relatively long cooling time of the glass to be tempered in the rapid cooling section.

[0006] To achieve this purpose, the present utility model adopts the following technical solutions:

[0007] A cooling air temperature reduction system for glass tempering includes a heat exchange air box, a primary heat exchanger, and a secondary heat exchanger;

[0008] The input port of the heat exchange air box is used to communicate with the output port of the fan, and the output port of the heat exchange air box is used to communicate with the cooling air input port of the rapid cooling section of the air grille;

[0009] The primary heat exchanger and the secondary heat exchanger are respectively installed in the heat exchange air box. The primary heat exchanger is close to the input port of the heat exchange air box, and the secondary heat exchanger is close to the output port of the heat exchange air box; the temperature of the refrigerant circulating in the secondary heat exchanger is lower than room temperature and lower than the temperature of the cooling water circulating in the primary heat exchanger;

[0010] The primary heat exchanger and the secondary heat exchanger are respectively used to exchange heat with the cooling air input into the heat exchange air box, and make the temperature of the cooling air output by the heat exchange air box lower than the set temperature threshold, and the temperature threshold is not higher than room temperature.

[0011] Further, it also includes a cooling water tower;

[0012] The cooling water input port of the primary heat exchanger is connected to the cooling water output port of the cooling water tower through a pipeline, and the cooling water output port of the primary heat exchanger is connected to the cooling water input port of the cooling water tower through a pipeline.

[0013] Further, it also includes a screw chiller;

[0014] The refrigerant input port of the secondary heat exchanger is connected to the refrigerant output port of the screw chiller through a pipeline, and the refrigerant output port of the secondary heat exchanger is connected to the refrigerant input port of the screw chiller through a pipeline.

[0015] Further, it also includes a circulation pump;

[0016] Circulation pumps are installed on the pipeline connecting the refrigerant output port of the secondary heat exchanger and the refrigerant input port of the screw chiller, and on the pipeline connecting the cooling water output port of the primary heat exchanger and the cooling water input port of the cooling water tower.

[0017] Further, it also includes a heat preservation tank;

[0018] The refrigerant output port of the secondary heat exchanger is connected to the refrigerant input port of the heat preservation tank through a pipeline, and the refrigerant output port of the heat preservation tank is connected to the refrigerant input port of the screw chiller through a pipeline.

[0019] Further, the refrigerant output port of the screw chiller is connected to the refrigerant input port of the heat preservation tank and the refrigerant input port of the secondary heat exchanger respectively through two pipelines.

[0020] Further, the screw chiller is provided with a screw cooling cavity;

[0021] The cooling water input port of the screw cooling cavity is connected to the cooling water output port of the cooling water tower through a pipeline, and the cooling water output port of the screw cooling cavity is connected to the cooling water input port of the cooling water tower through a pipeline.

[0022] The technical solution of a cooling air cooling system for glass tempering proposed by the present utility model has the beneficial effect that: the heat exchange air box is equipped with a primary heat exchanger and a secondary heat exchanger, and heat exchange can be carried out between the circulating cooling water in the primary heat exchanger and the circulating refrigerant in the secondary heat exchanger and the cooling air input into the heat exchange air box, so that the cooling air output from the heat exchange air box is lower than the room temperature, increasing the cold quantity of the cooling air input into the rapid cooling section of the air grille, thereby shortening the cooling time of the glass to be tempered in the rapid cooling section and improving the production efficiency of glass tempering. Description of the Drawings

[0023] Figure 1 This is a schematic structural diagram of an embodiment of a heat exchange air box of a cooling air temperature reduction system for glass tempering according to the present utility model;

[0024] Figure 2 This is a schematic diagram of the circulation path of cooling water and refrigerant in a cooling air temperature reduction system for glass tempering according to the present utility model;

[0025] Wherein: heat exchange air box 1; primary heat exchanger 2; secondary heat exchanger 3; cooling water tower 4; screw chiller 5; heat preservation tank 6; circulation pump 7. Detailed implementation manners

[0026] The following combines the attached Figure 1-2 And further illustrates the technical solution of the present utility model through specific implementation manners.

[0027] The attached drawings are only for illustrative purposes and cannot be construed as a limitation to this patent; for better illustrating this embodiment, some components in the attached drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be said that the interiors of two components are in communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] A cooling air temperature reduction system for glass tempering includes a heat exchange air box 1, a primary heat exchanger 2 and a secondary heat exchanger 3;

[0030] The input port of the heat exchange air box 1 is used to communicate with the output port of the fan, and the output port of the heat exchange air box 1 is used to communicate with the cooling air input port of the air grid rapid cooling section;

[0031] The primary heat exchanger 2 and the secondary heat exchanger 3 are respectively installed in the heat exchange air box 1. The primary heat exchanger 2 is close to the input port of the heat exchange air box 1, and the secondary heat exchanger 3 is close to the output port of the heat exchange air box 1; the temperature of the refrigerant circulating in the secondary heat exchanger 3 is lower than room temperature and lower than the temperature of the cooling water circulating in the primary heat exchanger 2;

[0032] The first-stage heat exchanger 2 and the second-stage heat exchanger 3 are respectively used to exchange heat with the cooling air input into the heat exchange air box 1, and make the temperature of the cooling air output from the heat exchange air box 1 lower than the set temperature threshold, and the temperature threshold is not higher than the room temperature.

[0033] Figure 1 It is a schematic structural diagram of an embodiment of the heat exchange air box 1 of a cooling air temperature reduction system for glass tempering of the present invention. Figure 1 The direction in which the cooling air enters the heat exchange air box 1 is indicated by the arrow with a dotted line in the figure.

[0034] It should be noted that the air pressure of the fan that provides cooling air for the air grille rapid cooling section is as high as 20,000 Pa, the impeller rotates fast, and the friction between the air in the fan and the impeller and the inner wall is large, resulting in the temperature of the air output by the fan being close to 80°C.

[0035] A cooling air temperature reduction system for glass tempering of the present invention adopts a heat exchange air box 1 equipped with a first-stage heat exchanger 2 and a second-stage heat exchanger 3, and can exchange heat between the circulating cooling water in the first-stage heat exchanger 2 and the circulating refrigerant in the second-stage heat exchanger 3 and the cooling air input into the heat exchange air box 1, so that the temperature of the cooling air output from the heat exchange air box 1 is lower than the room temperature.

[0036] Furthermore, it further includes a cooling water tower 4;

[0037] The cooling water input port of the first-stage heat exchanger 2 is connected to the cooling water output port of the cooling water tower 4 through a pipeline, and the cooling water output port of the first-stage heat exchanger 2 is connected to the cooling water input port of the cooling water tower 4 through a pipeline.

[0038] Figure 2 It is a schematic diagram of the circulation path of the cooling water and the refrigerant in a cooling air temperature reduction system for glass tempering of the present invention.

[0039] As Figure 2 shown, when the room temperature is not higher than 30°C, the water temperature of the cooling water circulated and cooled by the cooling water tower 4 is lower than 30°C, and then through the first-stage heat exchanger 2, the cooling air output from the heat exchange air box 1 can be cooled to below 30°C, and the cooling air with a temperature lower than 30°C is transported to the rapid cooling section of the air grille, which can make the rapid cooling section of the air grille have good cooling efficiency, shorten the cooling time of the glass to be tempered in the rapid cooling section, and improve the production efficiency of glass tempering.

[0040] Furthermore, it further includes a screw chiller 5;

[0041] The refrigerant inlet of the secondary heat exchanger 3 is connected to the refrigerant outlet of the screw chiller 5 through a pipeline, and the refrigerant outlet of the secondary heat exchanger 3 is connected to the refrigerant inlet of the screw chiller 5 through a pipeline.

[0042] When the room temperature exceeds 30 °C, the cooling efficiency of the cooling water tower 4 decreases, and the water temperature of the cooling water circulated through the cooling water tower 4 is not lower than 30 °C. At this time, only using the primary heat exchanger 2 cannot cool the cooling air output from the heat exchange air box 1 below 30 °C.

[0043] As Figure 2 shown, the refrigerant temperature cyclically output by the screw chiller 5 is not higher than 15 °C. When the water temperature of the cooling water circulated through the cooling water tower 4 is higher than 30 °C, the cooperation of the screw chiller 5 and the heat exchanger 3 can be used to perform a second heat exchange on the cooling air input into the heat exchange air box 1, so that the temperature of the cooling air output from the heat exchange air box 1 is reduced to the temperature threshold (such as 25 °C) set by the process control requirements, thereby ensuring the production efficiency of glass tempering.

[0044] Furthermore, a circulation pump 7 is further included;

[0045] Circulation pumps 7 are installed in the pipeline connecting the refrigerant outlet of the secondary heat exchanger 3 and the refrigerant inlet of the screw chiller 5, and in the pipeline connecting the cooling water outlet of the primary heat exchanger 2 and the cooling water inlet of the cooling water tower 4.

[0046] As Figure 2 shown, the circulation pump 7 can control the flow rate and pressure of the refrigerant or cooling water transported in the corresponding pipeline.

[0047] In a preferred embodiment, two circulation pumps 7 can be installed in parallel in each refrigerant circulation pipeline or cooling water circulation pipeline, and one of the circulation pumps 7 is for standby.

[0048] Furthermore, a heat preservation tank 6 is further included;

[0049] The refrigerant outlet of the secondary heat exchanger 3 is connected to the refrigerant inlet of the heat preservation tank 6 through a pipeline, and the refrigerant outlet of the heat preservation tank 6 is connected to the refrigerant inlet of the screw chiller 5 through a pipeline.

[0050] As Figure 2 shown, more refrigerant with a temperature lower than 15 °C can be stored through the heat preservation tank 6, so that after the screw chiller 5 is started, the secondary heat exchanger 3 can quickly exert a cooling effect immediately, and the temperature of the cooling air output from the heat exchange air box 1 can be continuously maintained below the set temperature threshold.

[0051] Further, the refrigerant outlet of the screw chiller 5 is connected to the refrigerant inlet of the heat preservation tank 6 and the refrigerant inlet of the secondary heat exchanger 3 through two pipelines respectively.

[0052] As Figure 2 shown, the screw chiller 5 has high cooling efficiency. When the temperature of the refrigerant output by the screw chiller 5 is lower than 10°C, the temperature of the cooling air of the secondary heat exchanger 3 and the cooling air of the heat exchange air box 1 will be significantly lower than the temperature threshold set according to the process control requirements, resulting in waste due to improper use of the refrigerant cooling capacity. At this time, the refrigerant flow rate input by the screw chiller 5 to the secondary heat exchanger 3 can be reduced, and at the same time, the refrigerant with the remaining flow rate can be input into the heat preservation tank 6 through the pipeline connected to the refrigerant inlet of the heat preservation tank 6 to improve the utilization rate of the refrigerant cooling capacity.

[0053] Further, the screw chiller 5 is provided with a screw cooling cavity;

[0054] The cooling water inlet of the screw cooling cavity is connected to the cooling water outlet of the cooling water tower 4 through a pipeline, and the cooling water outlet of the screw cooling cavity is connected to the cooling water inlet of the cooling water tower 4 through a pipeline.

[0055] As Figure 2 shown, the cooling water of the cooling water tower 4 can be used to input the screw cooling cavity to cool the screw in the screw chiller 5, so as to prevent the screw in the screw chiller 5 from being damaged due to too high temperature, and further improve the operation stability and service life of the screw chiller 5.

[0056] In summary, as Figure 1-2 shown in the embodiment of the present invention, for the cooling air cooling system for glass tempering proposed by the present invention, a primary heat exchanger 2 and a secondary heat exchanger 3 are installed in the heat exchange air box 1 adopted. The heat exchange can be carried out between the circulating cooling water in the primary heat exchanger 2 and the circulating refrigerant in the secondary heat exchanger 3 and the cooling air input into the heat exchange air box 1, so that the cooling air output by the heat exchange air box 1 is lower than the room temperature, the cooling capacity of the cooling air input into the rapid cooling section of the air grille is increased, and then the cooling time of the glass to be tempered in the rapid cooling section is shortened, and the production efficiency of glass tempering is improved.

[0057] The technical principle of the present invention has been described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted in any way as a limitation on the protection scope of the present invention. Based on the explanations herein, those skilled in the art can think of other specific embodiments of the present invention without creative labor, and these embodiments will fall within the protection scope of the present invention.

Claims

1. A cooling air temperature reduction system for glass tempering, characterized in that: It includes a heat exchange bellows, a primary heat exchanger and a secondary heat exchanger; The input port of the heat exchange wind box is used to be connected to the output port of the fan, and the output port of the heat exchange wind box is used to be connected to the cooling air input port of the wind grid rapid cooling section; The primary heat exchanger and the secondary heat exchanger are respectively installed in the heat exchange wind box, the primary heat exchanger is close to the input port of the heat exchange wind box, and the secondary heat exchanger is close to the output port of the heat exchange wind box; the temperature of the refrigerant circulating in the secondary heat exchanger is lower than the room temperature and lower than the temperature of the cooling water circulating in the primary heat exchanger; The primary heat exchanger and the secondary heat exchanger are respectively used to exchange heat with the cooling air input into the heat exchange wind box, and make the temperature of the cooling air output from the heat exchange wind box lower than a set temperature threshold, and the temperature threshold is not higher than room temperature.

2. The cooling air temperature reduction system for glass tempering according to claim 1, characterized in that: It also includes cooling water towers; The cooling water inlet of the primary heat exchanger is connected to the cooling water outlet of the cooling water tower through a pipeline, and the cooling water outlet of the primary heat exchanger is connected to the cooling water inlet of the cooling water tower through a pipeline.

3. The cooling air temperature reduction system for glass tempering according to claim 2, characterized in that: It also includes screw chillers; The refrigerant input port of the secondary heat exchanger is connected to the refrigerant output port of the screw chiller through a pipeline, and the refrigerant output port of the secondary heat exchanger is connected to the refrigerant input port of the screw chiller through a pipeline.

4. The cooling air temperature reduction system for glass tempering according to claim 3 is characterized in that: Also includes a circulation pump; The pipeline connecting the refrigerant outlet of the secondary heat exchanger and the refrigerant inlet of the screw chiller, and the pipeline connecting the cooling water outlet of the primary heat exchanger and the cooling water inlet of the cooling water tower are both equipped with circulation pumps.

5. The cooling air temperature reduction system for glass tempering according to claim 3, characterized in that: Also includes thermal cans; The refrigerant outlet of the secondary heat exchanger is connected to the refrigerant inlet of the insulation tank through a pipeline, and the refrigerant outlet of the insulation tank is connected to the refrigerant inlet of the screw chiller through a pipeline.

6. The cooling air temperature reduction system for glass tempering according to claim 5, characterized in that: The refrigerant outlet of the screw chiller is respectively connected to the refrigerant inlet of the insulation tank and the refrigerant inlet of the secondary heat exchanger through two pipelines.

7. The cooling air temperature reduction system for glass tempering according to claim 3, characterized in that: The screw chiller is provided with a screw cooling chamber; The cooling water inlet of the screw cooling chamber is connected to the cooling water outlet of the cooling water tower through a pipeline, and the cooling water outlet of the screw cooling chamber is connected to the cooling water inlet of the cooling water tower through a pipeline.

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