A display cabinet glass inner heating anti-condensation system and anti-condensation method
The circulation system controlled by the condenser waste heat recovery device and temperature and humidity sensors solved the condensation problem on the glass door of the display case, achieving a low-energy and cost-controllable anti-condensation effect, and protecting the compressor room and glass.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AUCMA
- Filing Date
- 2024-03-15
- Publication Date
- 2026-06-09
AI Technical Summary
Existing methods for preventing condensation on display case glass doors have problems such as high energy consumption and uncontrollable costs. Traditional methods such as electric heating and spray coating have additional energy consumption or affect light transmittance, while methods such as filling insulated glass with argon have failed to fundamentally solve the condensation problem.
The gas is heated by a condenser waste heat recovery device, and after being dehumidified by a drying device, the heat is released in the sealed interlayer of the glass. Combined with temperature and humidity sensors and a controller to control the opening and closing of valves, a circulation system is formed to prevent condensation.
It reduces energy consumption, protects the temperature of the press chamber, prevents the press from overheating, improves the thermal environment, and protects the glass through uniform heat transfer, avoiding condensation.
Smart Images
Figure CN118078070B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of commercial appliance refrigeration technology, and particularly relates to a display cabinet glass internal heating anti-condensation system and anti-condensation method. Background Technology
[0002] For glass-door display cases used in commercial channels such as supermarkets, beverage shops, hotels, and restaurants, condensation frequently occurs in high-humidity environments due to the need for frequent opening and closing of the doors and the significant temperature difference between the inside and outside. Commercial refrigerated display cases are highly specialized, requiring not only specific storage temperatures but also effective product display. When humid air encounters glass, if the temperature is below the dew point, water vapor will adhere to the glass surface, forming fog or droplets. Condensation severely affects the display effect of commercial refrigerated display cases, hinders consumers' product selection, and is detrimental to the storage of goods inside the display case.
[0003] Currently, the main solutions to the condensation problem on display case glass doors include electric heating and spray coating. Methods such as TEC series coated glass, ITO film heating, and heating wires to prevent condensation incur additional energy consumption and pose electrical safety issues. The coating also affects light transmittance to some extent, and heating the glass can affect the temperature distribution inside the display case, impacting product preservation and creating additional costs. Argon-filled insulated glass, multi-layered insulated glass, hydrophobic coatings, and multi-layer spraying do not require additional energy, but they do not fundamentally solve the condensation problem, and condensation can still occur in adverse environments. Combining these two methods further increases costs.
[0004] Therefore, the key to solving the above problems lies in providing a low-energy-consumption, cost-controllable method for heating the inside of display cabinet glass to prevent condensation. Summary of the Invention
[0005] This invention addresses the high energy consumption problem of existing anti-condensation methods for display cabinet glass doors by proposing an internal heating anti-condensation system and method for display cabinet glass. It uses waste heat from the condenser to heat the gas and prevent condensation, while also using an auxiliary electric heating device. This not only reduces energy consumption but also lowers the temperature of the press chamber, prevents the press from overheating, protects the press, and improves the thermal environment of the press chamber.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:
[0007] A display case glass internal heating anti-condensation system includes:
[0008] A condenser waste heat recovery device, the air inlet of which is connected to the condenser inside the display case, is used to absorb heat from the condenser;
[0009] The gas heating unit includes a drying device, a valve, and a gas storage tank. The drying device is connected to the outlet of the condenser waste heat recovery device and is used to dehumidify and heat the heat absorbed from the condenser, and to deliver the resulting high-temperature gas to the glass interlayer of the display case to release heat. The valve is located on the delivery pipeline between the drying device and the condenser waste heat recovery device. The gas storage tank is connected to the outlet of the glass interlayer and the condenser waste heat recovery device, respectively, to temporarily store the cooled gas and deliver it back to the condenser waste heat recovery device.
[0010] The temperature and humidity detection unit includes several temperature and humidity sensors for detecting the temperature and humidity at different locations;
[0011] The controller connects the temperature and humidity detection unit and the valve, and outputs control commands to the temperature and humidity detection unit to detect temperature and humidity, and controls the opening and closing of the valve according to the detection results.
[0012] In one embodiment, the condenser waste heat recovery device is a finned tube heat exchanger, which is filled with inert gas and sealed with sealant.
[0013] In one embodiment, the drying device is a drying tube filled with a desiccant, which is a molecular sieve or other non-powdered desiccant.
[0014] In one embodiment, the intermediate sealing interlayer is disposed between the outer glass and the inner glass of the display case, and further includes:
[0015] The glass interlayer is sealed and equipped with a temperature sensor.
[0016] The air inlet of the sealed interlayer is located at the lower end of the glass intermediate sealed interlayer body and is connected to the air outlet of the drying device.
[0017] The air outlet of the sealed interlayer is located at the upper end of the sealed interlayer body in the middle of the glass and is connected to the air inlet of the gas storage tank.
[0018] In one embodiment, the connections between the condenser waste heat recovery device and the drying device, as well as between the gas storage tank and the glass intermediate sealing interlayer, are all sealed connections.
[0019] In one embodiment, the plurality of temperature and humidity sensors include a first temperature and humidity sensor for detecting ambient temperature and humidity, a second temperature sensor for detecting the temperature of the condenser waste heat recovery device, a third temperature and humidity sensor for detecting the temperature and humidity of the gas in the intermediate sealing layer of the glass, and a fourth temperature and humidity sensor for detecting the temperature and humidity inside the display case.
[0020] A display case includes a cabinet body and a glass door that cooperate with each other. The bottom of the cabinet body is provided with a press chamber. The press chamber is provided with a condenser, a compressor, a throttling device and an evaporator, as well as the display case glass internal heating and anti-condensation system described in any of the above embodiments.
[0021] A method for preventing condensation on display case glass, utilizing the internal heating anti-condensation system for display case glass described in any of the above embodiments, includes the following steps:
[0022] The controller determines whether condensation has occurred based on the detection data from the first, third, and fourth temperature and humidity sensors. When no condensation is detected, the controller closes the valve, and the heated gas enters the gas storage tank for storage.
[0023] When the controller determines that condensation is about to occur on the display case glass based on the detection data of the first, third, and fourth temperature and humidity sensors, the controller controls the valve to open. The gas in the condenser waste heat recovery device passes through the drying device in sequence, enters the middle sealed interlayer of the glass through the air inlet of the sealed interlayer, and heats the glass evenly under the action of natural convection to prevent condensation from occurring. The gas cooled by the glass enters the gas storage tank to balance the pressure, and finally enters the condenser waste heat recovery device again to form a complete cycle.
[0024] In one embodiment, the controller detects the ambient temperature and humidity T1 and H1 from the first temperature and humidity sensor, the temperature T2 of the condenser waste heat recovery device from the second temperature sensor, the temperature and humidity T3 and H3 of the gas in the sealing interlayer of the glass from the third temperature and humidity sensor, and the temperature and humidity T4 and H4 inside the display case from the fourth temperature and humidity sensor at regular intervals. Condensation is determined by the following method:
[0025] Calculate the dew point temperature of the outer surface of the glass based on T1 and H1. If T3 is less than the dew point temperature plus the set temperature margin, the valve is opened; otherwise, the valve is closed. If T2 is less than the set value, the electric heating is turned on; otherwise, the electric heating is turned off. This continues until the next cycle or until operation stops.
[0026] Calculate the dew point temperature of the inner surface of the glass based on T4 and H4. If T3 is less than the dew point temperature plus the margin of the set temperature, the valve is opened; otherwise, the valve is closed. If T2 is less than the set value, the electric heating is turned on; otherwise, the electric heating is turned off. This continues until the next cycle or until operation stops.
[0027] If the H3 level rises after prolonged operation, the drying and filter device should be replaced promptly to prevent excessively high gas humidity.
[0028] Compared with the prior art, the advantages and positive effects of the present invention are as follows:
[0029] 1. This invention proposes a display case glass internal heating anti-condensation system. It prevents condensation by heating the gas through the recovery of waste heat from the condenser. At the same time, it is equipped with an auxiliary electric heating device, which not only reduces energy consumption, but also lowers the temperature of the compressor chamber, prevents the compressor from overheating, protects the compressor, and improves the thermal environment of the compressor chamber. In addition, this invention also includes a gas storage tank, which is used not only to temporarily store the cooled gas and transport it back to the condenser waste heat recovery device, but also to balance the pressure.
[0030] 2. This invention proposes a display case glass internal heating anti-condensation system. The system installs temperature and humidity sensors at different locations. The controller collects relevant data from the sensors at regular intervals and determines whether condensation will occur based on the data. Then, it controls the opening and closing of the valve. This method does not delay the occurrence of condensation, but rather adjusts the valve opening and closing in advance based on the signal obtained by the sensor to prevent the occurrence of condensation.
[0031] 3. This invention proposes a method for preventing condensation on display cabinet glass. This method involves uniform heat transfer from the inside of the glass to the outside, which can protect the glass. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of the anti-condensation system for display cabinet glass provided by the present invention;
[0033] Figure 2 This is a schematic diagram of the internal heating and anti-condensation system for the display case glass provided by the present invention.
[0034] Figure 3 This is a schematic diagram of the structure of the glass intermediate sealing interlayer provided by the present invention;
[0035] Figure 4 This is a schematic diagram of the hollow glass structure provided by the present invention;
[0036] Figure 5 This is a schematic diagram of the control method provided by the present invention;
[0037] Figure 6 Schematic diagram I of the overall structure of the display cabinet provided by the present invention;
[0038] Figure 7 This is a schematic diagram (II) of the overall structure of the display cabinet provided by the present invention.
[0039] The meanings of the labels in the above figures are as follows:
[0040] 1. Compressor; 2. Gas tank; 3. Glass interlayer sealing layer; 4. Drying device; 5. Valve; 6. Condenser waste heat recovery device; 7. Condenser; 8. Throttling device; 9. Evaporator; 10. Cabinet; 11. Controller; 12. Outer glass of display case; 13. Inner glass of display case;
[0041] 301. Glass interlayer sealing body; 302. Sealing interlayer air inlet; 303. Sealing interlayer air outlet; 304. Temperature sensor. Detailed Implementation
[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments provided by this invention without inventive effort are within the scope of protection of this invention.
[0043] Obviously, the accompanying drawings described below are merely some examples or embodiments of the present invention. Those skilled in the art can apply the present invention to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, modifications to design, manufacturing, or production based on the technical content disclosed in this invention are merely conventional technical means and should not be construed as insufficient disclosure of the present invention.
[0044] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention may be combined with other embodiments without conflict.
[0045] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," "an," "the," and similar words used in this invention do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this invention are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms "connected," "linked," and similar words used in this invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A plurality" in this invention refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships may exist; for example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects have an "or" relationship. The terms "first," "second," etc., used in this invention are merely to distinguish similar objects and do not represent a specific ordering of objects.
[0046] This invention provides a display case glass anti-condensation system. Figure 1-7 The following diagrams illustrate the principles of the anti-condensation system for display cabinet glass, the structure of the internal heating anti-condensation system for display cabinet glass, the structure of the intermediate sealing layer of the glass, the structure of the insulated glass, the control method flowchart, and the overall structure of the display cabinet (Diagrams I and II) according to embodiments of the present invention. (Reference) Figure 1-7As shown, the anti-condensation system for the display case glass includes at least: a condenser waste heat recovery device 6, a gas heating unit, a temperature and humidity detection unit, and a controller 11; wherein, the air inlet of the condenser waste heat recovery device 6 is connected to the condenser 7 inside the display case to absorb heat from the condenser 7; the gas heating unit includes a drying device 4, a valve 5, and a gas storage tank 2; the drying device 4 is connected to the air outlet of the condenser waste heat recovery device 6 to dehumidify and heat the heat absorbed from the condenser 7, and delivers the resulting high-temperature gas to the glass interlayer 3 of the display case to release heat; the valve 5 is located between the drying device 4 and the condenser waste heat recovery device 6. In the conveying pipeline between the recovery devices 6, when valve 5 is opened, the gas enters the drying device 4 through self-heating convection for dehumidification, which can further improve the anti-condensation effect. The gas storage tank 2 is connected to the gas outlet of the glass intermediate sealing layer 3 and the waste heat recovery device of the condenser 7, respectively, to temporarily store the cooled gas and transport it back to the condenser waste heat recovery device. The temperature and humidity detection unit includes several temperature and humidity sensors for detecting the temperature and humidity at different locations. The controller 11 is connected to the temperature and humidity detection unit and valve 5, and outputs control commands to the temperature and humidity detection unit to detect the temperature and humidity, and controls the opening and closing of valve 5 according to the detection results. Specifically, when valve 5 is closed, the gas heated by condenser 7 enters the gas storage tank 2 in a reverse circulation to balance the pressure change caused by the thermal expansion of the gas; when valve 5 is open, the gas storage tank 2 can automatically balance the pressure, balancing the pressure change caused by the temperature change of the gas in the glass intermediate sealing layer 3, so as to protect the glass of the display case.
[0047] In some embodiments, reference Figure 1 and Figure 2 The condenser waste heat recovery device 6 is a finned tube heat exchanger, which is filled with inert gas and sealed with sealant.
[0048] In other embodiments, the condenser waste heat recovery device 6 may also be a heat pipe, with one end absorbing heat near the compressor chamber condenser 7 and the other end releasing heat in a loop near the gas storage tank 2. (Valve 5, drying pipe, insulating glass (reference)) Figure 4 The air tanks 1 and 2 are connected in sequence to form a circulation system. The operation of the system is controlled by valves. The other components of this glass door anti-condensation system are basically the same as those in the first embodiment.
[0049] In some embodiments, the drying device 4 is a drying tube filled with a desiccant, which is a molecular sieve or other non-powdered desiccant.
[0050] In some embodiments, reference Figure 3The intermediate glass sealing layer 3 is located between the outer glass 12 and the inner glass 13 of the display case, and further includes: an intermediate glass sealing layer body 301, an air inlet 302, and an air outlet 303; wherein, the intermediate glass sealing layer body 301 is equipped with a temperature sensor 304; the air inlet 302 is located at the lower end of the intermediate glass sealing layer body 301 and is connected to the air outlet of the drying device 4; the air outlet 303 is located at the upper end of the intermediate glass sealing layer body 301 and is connected to the air inlet of the air storage tank 2.
[0051] In some embodiments, the connections between the condenser waste heat recovery device 6 and the drying device 4, as well as between the gas storage tank 2 and the glass intermediate sealing interlayer 3, are all sealed connections.
[0052] In some embodiments, the plurality of temperature and humidity sensors include a first temperature and humidity sensor for detecting ambient temperature and humidity, a second temperature sensor for detecting the temperature of the condenser waste heat recovery device 6, a third temperature and humidity sensor (i.e., temperature sensor 304) for detecting the temperature and humidity of the gas in the glass intermediate sealing interlayer 3, and a fourth temperature and humidity sensor for detecting the temperature and humidity inside the display case.
[0053] refer to Figure 6 and Figure 7 A display case includes a cabinet body and a glass door that cooperate with each other. The bottom of the cabinet body is provided with a press chamber, and the press chamber is provided with a condenser 7, a compressor 1, a throttling device 8 and an evaporator 9, as well as a display case glass internal heating and anti-condensation system listed in any of the above embodiments.
[0054] This invention also provides a method for preventing condensation on display case glass. This method utilizes an internal heating anti-condensation system for display case glass as described in any of the above embodiments, with reference to... Figure 5 This includes the following steps:
[0055] S1. Based on the detection data of the first, third and fourth temperature and humidity sensors, determine whether condensation has occurred. When no condensation is detected, the controller 11 controls the valve 5 to close, and the heated gas enters the gas storage tank 2 for storage.
[0056] S2. When the controller 11 determines that condensation is about to occur on the glass of the display case based on the detection data of the first, third and fourth temperature and humidity sensors, the controller 11 controls the valve 5 to open. The gas in the condenser waste heat recovery device 6 passes through the drying device 4 in sequence, enters the middle sealed interlayer 3 of the glass through the sealed interlayer air inlet 302, and heats the glass evenly under the action of natural convection to prevent condensation from occurring. The gas after being cooled by the glass enters the gas storage tank 2 to balance the pressure, and finally enters the condenser waste heat recovery device 6 again to form a complete cycle.
[0057] In some embodiments, the controller 11 detects the ambient temperature and humidity T1 and H1 from the first temperature and humidity sensor, the temperature T2 of the condenser waste heat recovery device 6 from the second temperature sensor, the temperature and humidity T3 and H3 of the gas in the glass interlayer sealing layer 3 from the third temperature and humidity sensor, and the temperature and humidity T4 and H4 inside the display case from the fourth temperature and humidity sensor at regular intervals. Condensation is determined by the following method:
[0058] Calculate the dew point temperature of the outer surface of the glass based on T1 and H1. If T3 is less than the dew point temperature plus the set temperature margin, then valve 5 is opened; otherwise, valve 5 is closed. If T2 is less than the set value, then electric heating is turned on; otherwise, electric heating is turned off. This continues until the next cycle or until the operation stops.
[0059] Calculate the dew point temperature of the inner surface of the glass based on T4 and H4. If T3 is less than the dew point temperature plus the margin of the set temperature, then valve 5 is opened; otherwise, valve 5 is closed. If T2 is less than the set value, then electric heating is turned on; otherwise, electric heating is turned off. This continues until the next cycle or until operation stops.
[0060] If the H3 level rises after prolonged operation, the drying and filter device should be replaced promptly to prevent excessively high gas humidity.
[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0062] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.
Claims
1. A display case glass internal heating and anti-condensation system, characterized in that, include: A condenser waste heat recovery device, the air inlet of which is connected to the condenser inside the display case, is used to absorb heat from the condenser; The gas heating unit includes a drying device, a valve, and a gas storage tank. The drying device is connected to the outlet of the condenser waste heat recovery device and is used to dehumidify and heat the heat absorbed from the condenser, and to deliver the resulting high-temperature gas to the glass interlayer of the display case to release heat. The valve is located on the delivery pipeline between the drying device and the condenser waste heat recovery device. The gas storage tank is connected to the outlet of the glass interlayer and the condenser waste heat recovery device, respectively, to temporarily store the cooled gas and deliver it back to the condenser waste heat recovery device. The temperature and humidity detection unit includes several temperature and humidity sensors for detecting the temperature and humidity at different locations; The controller connects the temperature and humidity detection unit and the valve, and outputs control commands to the temperature and humidity detection unit to detect temperature and humidity, and controls the opening and closing of the valve according to the detection results; The intermediate sealing interlayer is disposed between the outer glass and the inner glass of the display case, and further includes: The glass interlayer is sealed and equipped with a temperature sensor. The air inlet of the sealed interlayer is located at the lower end of the glass intermediate sealed interlayer body and is connected to the air outlet of the drying device. The air outlet of the sealed interlayer is located at the upper end of the sealed interlayer body in the middle of the glass and is connected to the air inlet of the gas storage tank.
2. The anti-condensation system for internal heating of display cabinet glass according to claim 1, characterized in that, The condenser waste heat recovery device is a finned tube heat exchanger, which is filled with inert gas and sealed with sealant.
3. The anti-condensation system for internal heating of display cabinet glass according to claim 1, characterized in that, The drying device is a drying tube, which is filled with a desiccant, which is a molecular sieve or other non-powdered desiccant.
4. The anti-condensation system for internal heating of display cabinet glass according to claim 1, characterized in that, The connections between the condenser waste heat recovery device and the drying device, as well as between the gas storage tank and the glass intermediate sealing layer, are all sealed connections.
5. The anti-condensation system for internal heating of display cabinet glass according to claim 1, characterized in that, The plurality of temperature and humidity sensors include a first temperature and humidity sensor for detecting ambient temperature and humidity, a second temperature sensor for detecting the temperature of the condenser waste heat recovery device, a third temperature and humidity sensor for detecting the temperature and humidity of the gas in the intermediate sealing layer of the glass, and a fourth temperature and humidity sensor for detecting the temperature and humidity inside the display case.
6. A display case comprising a cabinet and a glass door that cooperate with each other, wherein a press chamber is provided at the bottom of the cabinet, and the press chamber is provided with a condenser, a compressor, a throttling device, and an evaporator, characterized in that, It also includes a display case glass internal heating and anti-condensation system as described in any one of claims 1-5.
7. A method for preventing condensation on display case glass, characterized in that, The process, utilizing a display case glass internal heating and anti-condensation system as described in any one of claims 1-5, includes the following steps: The controller determines whether condensation has occurred based on the detection data from the first, third, and fourth temperature and humidity sensors. When no condensation is detected, the controller closes the valve, and the heated gas enters the gas storage tank for storage. When the controller determines that condensation is about to occur on the glass of the display case based on the detection data of the first, third, and fourth temperature and humidity sensors, the controller controls the valve to open. The gas in the condenser waste heat recovery device passes through the drying device in sequence, enters the middle sealed interlayer of the glass through the air inlet of the sealed interlayer, and heats the glass evenly under the action of natural convection to prevent condensation from occurring. The gas after being cooled by the glass enters the gas storage tank to balance the pressure, and finally enters the condenser waste heat recovery device again to form a complete cycle. The controller, at regular intervals, detects the ambient temperature and humidity T1 and H1 from the first temperature and humidity sensor, the temperature T2 of the condenser waste heat recovery device from the second temperature sensor, the temperature and humidity T3 and H3 of the gas in the sealing interlayer of the glass from the third temperature and humidity sensor, and the temperature and humidity T4 and H4 inside the display case from the fourth temperature and humidity sensor. Condensation is determined using the following methods: Calculate the dew point temperature of the outer surface of the glass based on T1 and H1. If T3 is less than the dew point temperature plus the set temperature margin, the valve is opened; otherwise, the valve is closed. If T2 is less than the set value, the electric heating is turned on; otherwise, the electric heating is turned off. This continues until the next cycle or until operation stops. Calculate the dew point temperature of the inner surface of the glass based on T4 and H4. If T3 is less than the dew point temperature plus the margin of the set temperature, the valve is opened; otherwise, the valve is closed. If T2 is less than the set value, the electric heating is turned on; otherwise, the electric heating is turned off. This continues until the next cycle or until operation stops. If the H3 level rises after prolonged operation, the drying and filter device should be replaced promptly to prevent excessively high gas humidity.