Refrigerator condensation inhibition system based on phase change heat storage and working method thereof

Abstract

The invention discloses a refrigerator condensation restraining system based on phase change heat storage and a working method thereof.The refrigerator condensation restraining system based on phase change heat storage is installed on a refrigerator, the refrigerator comprises a refrigerator body, an upper door body and a lower door body, the upper door body and the lower door body are installed on the refrigerator body, and a refrigerator container is formed in the refrigerator; a middle beam is installed at the position, between the upper door body and the lower door body, of the refrigerator liner, door sealing strips are installed on the faces, facing the refrigerator body, of the upper door body and the lower door body, a phase change heat storage unit is attached to the face, facing the inner space of the refrigerator body and opposite to the door sealing strips, of the middle beam, and paraffin is filled in the phase change heat storage unit in a sealed mode. A dew removal pipe is wound on the face, facing the inner space of the refrigerator body, of the phase change heat storage unit, and an inlet and an outlet of the dew removal pipe are connected with a refrigerating system of the refrigerator. According to the refrigerator condensation inhibition system based on phase change heat storage and the working method thereof, condensation can be effectively prevented, and extra energy consumption can be reduced to the maximum extent.

Description

Technical fields:

[0001] This invention relates to a refrigerator condensation suppression system based on phase change heat storage and its working method, which belongs to the field of household appliance technology. Background technology:

[0002] When a refrigerator operates in a high-temperature and high-humidity environment, condensation can easily form on the exterior of the cabinet, especially around the area where the door seal contacts the cabinet, because the surface temperature is lower than the dew point temperature of the air. Condensation not only affects the appearance but can also lead to door corrosion and mold growth if left untreated for a long time.

[0003] Currently, there are two main methods for preventing condensation: One is to use the high-temperature refrigerant from the condenser to flow through a defrosting pipe embedded in the door liner, using waste heat to raise the temperature of the door seal area. This method is energy-efficient, but its thermal effect varies with the compressor's start and stop times, and its effectiveness is insufficient when the compressor is off for extended periods or when the ambient humidity is extremely high. The second method is to directly embed an electric heating wire in the door seal, using continuous or intermittent heating to prevent condensation. This method is reliable, but it significantly increases the refrigerator's standby energy consumption.

[0004] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Summary of the Invention:

[0005] The present invention provides a refrigerator condensation suppression system and its working method based on phase change heat storage to solve the problems existing in the prior art. It can effectively prevent condensation and minimize additional energy consumption.

[0006] The present invention adopts the following technical solution: a refrigerator condensation suppression system based on phase change heat storage, which is installed on a refrigerator. The refrigerator includes a cabinet and an upper door and a lower door installed on the cabinet. A cabinet liner is formed inside the refrigerator. A central beam is installed on the cabinet liner between the upper door and the lower door. Door seals are installed on the upper door and the lower door facing the cabinet. A phase change heat storage unit is attached to the central beam facing the interior space of the cabinet and opposite to the door seal. The phase change heat storage unit is sealed and filled with paraffin wax. A decondensation pipe is coiled on the phase change heat storage unit facing the interior space of the cabinet. The inlet and outlet of the decondensation pipe are connected to the refrigerator's refrigeration system.

[0007] Furthermore, heating wires are embedded on the surface of the central beam that faces away from the interior space of the box.

[0008] Furthermore, the phase change heat storage unit is attached to the central beam using thermally conductive adhesive.

[0009] Furthermore, the phase transition temperature of the paraffin is between 15-30°C.

[0010] Furthermore, a temperature sensor is installed on the top or side of the refrigerator.

[0011] The present invention also adopts the following technical solution: a working method of a refrigerator condensation suppression system based on phase change heat storage, the steps of which are as follows:

[0012] When the refrigerator is turned on to cool down, the high-temperature refrigerant flows through the defrosting pipe. The heat directly heats the central beam on one hand, and is transferred to the phase change heat storage unit on the other hand, causing the paraffin in it to melt and absorb heat.

[0013] After the refrigerator stops, ambient heat is conducted through the center beam, and the door seal area begins to cool down. When the temperature drops to the solidification point of paraffin wax, the paraffin wax begins to solidify, continuously releasing latent heat to the center beam and door seal, thus slowing down the temperature drop of their surfaces.

[0014] The present invention has the following beneficial effects:

[0015] (1) Significant energy saving: Fully utilize the waste heat of the refrigeration system and use the phase change heat storage unit to "shift peaks and fill valleys", which greatly reduces the working time and frequency of the electric heating wire and effectively reduces the energy consumption of the anti-condensation function.

[0016] (2) Stable effect: The temperature of the phase change material remains basically constant during the phase change process, which can provide a continuous and stable heat release process, which is more durable and reliable than simply relying on the residual heat of the dew pipe.

[0017] (3) Simple structure and easy to implement: The phase change heat storage unit can be flexibly designed and is well compatible with the existing refrigerator cabinet structure, with low modification cost. Attached image description:

[0018] Figure 1 This is a front view of the refrigerator condensation suppression system based on phase change heat storage according to the present invention.

[0019] Figure 2 This is a rear view of the refrigerator condensation suppression system based on phase change heat storage according to the present invention.

[0020] Figure 3 This is a cross-sectional view of the refrigerator condensation suppression system based on phase change heat storage according to the present invention. Detailed implementation method:

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] This invention relates to a refrigerator condensation suppression system based on phase change heat storage. The system is installed on a refrigerator, which includes a cabinet and an upper door 1 and a lower door 2 mounted on the cabinet. An interior liner 3 is formed inside the refrigerator. A center beam 4 is installed on the interior liner 3 between the upper door 1 and the lower door 2. Door seals 5 are installed on the surfaces of the upper door 1 and the lower door 2 facing the cabinet. A phase change heat storage unit 6 is attached to the surface of the center beam 4 facing the interior space of the cabinet, opposite to the door seals 5, using thermally conductive adhesive. The phase change heat storage unit 6 is sealed and filled with paraffin wax with a phase change temperature of approximately 29°C.

[0023] A decondensation pipe 7 is coiled around the side of the phase change heat storage unit 6 facing the interior space of the refrigerator. The inlet and outlet of the decondensation pipe 7 are connected to the refrigerator's refrigeration system. A heating wire 8 is embedded in the side of the central beam 4 facing away from the interior space of the refrigerator. A temperature sensor 9 is installed on the top or side of the refrigerator to detect the ambient temperature.

[0024] The working method of the refrigerator condensation suppression system based on phase change heat storage of this invention is as follows:

[0025] When the refrigerator is turned on to cool down, the high-temperature refrigerant flows through the defrosting pipe 7. The heat directly heats the central beam 2 on one hand, and is transferred to the phase change heat storage unit 6 on the other hand, causing the paraffin in it to melt and absorb heat (heat storage stage).

[0026] After the refrigerator stops, ambient heat is conducted through the center beam 4, and the door seal area begins to cool down. When the temperature drops to the solidification point of paraffin wax (about 29°C), the paraffin wax begins to solidify, continuously releasing latent heat to the center beam 4 and the door seal 5, thus slowing down the decrease in their surface temperature (passive heat release stage).

[0027] In most cases, condensation can be prevented by relying solely on phase change heat storage and residual heat from the dew removal tube, and the auxiliary heating wire only needs to work in a few extreme weather conditions, thus achieving the energy-saving goal.

[0028] This invention relates to a refrigerator condensation suppression system based on phase change heat storage. A phase change heat storage unit 6 is installed on the refrigerator's central beam 4, filled with a paraffin-based phase change material with a phase change temperature between 15-30℃. A decondensation tube 7 is coiled around the phase change heat storage unit 6. When the refrigerator is running, the heat generated by the refrigeration system heats the decondensation tube 7, simultaneously storing heat in the phase change heat storage unit 6. When the refrigerator compartment temperature reaches the set value and the system shuts down, the phase change heat storage unit 6 slowly releases the stored latent heat, maintaining the surface temperature of the door seal area above the dew point, thereby preventing condensation. Only when the ambient temperature and humidity are extremely high, and the residual heat of the phase change heat storage unit 6 and the decondensation tube 7 is insufficient to prevent condensation, is the auxiliary heating wire intermittently activated. This invention effectively reduces the energy consumption of the anti-condensation function and improves the refrigerator's energy efficiency rating.

[0029] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A refrigerator condensation suppression system based on phase change heat storage, installed on a refrigerator, the refrigerator comprising a cabinet and an upper door (1) and a lower door (2) installed on the cabinet, characterized in that: The refrigerator has a liner (3) inside. A middle beam (4) is installed on the liner (3) between the upper door (1) and the lower door (2). Door seals (5) are installed on the upper door (1) and the lower door (2) facing the refrigerator body. A phase change heat storage unit (6) is attached to the middle beam (4) facing the interior space of the refrigerator body and opposite to the door seals (5). The phase change heat storage unit (6) is sealed and filled with paraffin wax. A decondensation pipe (7) is coiled on the phase change heat storage unit (6) facing the interior space of the refrigerator body. The inlet and outlet of the decondensation pipe (7) are connected to the refrigerator's refrigeration system.

2. The refrigerator condensation suppression system based on phase change heat storage as described in claim 1, characterized in that: A heating wire (8) is embedded on the surface of the middle beam (4) that is away from the internal space of the box.

3. The refrigerator condensation suppression system based on phase change heat storage as described in claim 1, characterized in that: The phase change heat storage unit (6) is attached to the central beam (4) by thermally conductive adhesive.

4. The refrigerator condensation suppression system based on phase change heat storage as described in claim 1, characterized in that: The phase transition temperature of the paraffin is between 15-30℃.

5. The refrigerator condensation suppression system based on phase change heat storage as described in claim 1, characterized in that: A temperature sensor (9) is installed on the top or side of the refrigerator.

6. A method for operating a refrigerator condensation suppression system based on phase change heat storage, characterized in that: The steps are as follows: When the refrigerator is turned on to cool down, the high-temperature refrigerant flows through the defrosting pipe (7). The heat directly heats the central beam (2) on the one hand, and is transferred to the phase change heat storage unit (6) on the other hand, causing the paraffin in it to melt and absorb heat. After the refrigerator stops, ambient heat is conducted through the central beam (4), and the door seal area begins to cool down. When the temperature drops to the solidification point of paraffin, the paraffin begins to solidify and continuously releases latent heat to the central beam (4) and the door seal (5), delaying the decrease in their surface temperature.

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