Anti-frosting air-cooled refrigerator
By incorporating drainage channels and a hydrophobic coating into the air-cooled refrigerator, combined with defrosting pipes and negative pressure adsorption, the problem of evaporator frosting is solved, improving the cooling efficiency of the air-cooled refrigerator and the stability of the compressor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-10
AI Technical Summary
Frost buildup on the evaporator surface of a frost-free refrigerator reduces its cooling efficiency and affects the normal operation of the compressor.
A drainage channel is installed inside the air-cooled unit, the evaporator surface is coated with a hydrophobic coating, a defrost pipe is installed on the outside of the evaporator, the air outlet channel and the air return channel are respectively installed on two opposite side walls of the refrigeration chamber, the drainage channel and the air return channel are on the same side and extend downward at an angle, and the negative pressure of the refrigeration fan is used to adsorb the drain hole plug to prevent condensate from dripping onto the evaporator surface and forming frost.
It effectively prevents condensate from dripping onto the evaporator and the inner wall of the refrigeration chamber, maintains the heat exchange efficiency of the evaporator, avoids a decrease in the compressor's suction and discharge pressure, and improves the cooling effect.
Smart Images
Figure CN224108428U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of refrigerators, in particular to an anti-frost air-cooled refrigerator. BACKGROUND
[0002] The air-cooled refrigerator basically comprises a cabinet and an air-cooled main unit. The air-cooled main unit realizes refrigeration through the cooperative work of the built-in compressor, condenser, evaporator and fan. When the compressor operates, the refrigerant is compressed into a high-temperature and high-pressure gas, then flows into the condenser, and becomes a liquid through heat dissipation. The liquid refrigerant enters the evaporator after being throttled and pressure-reduced by the expansion valve, evaporates into a gas by absorbing the heat of the refrigeration cavity, and the fan operates to circulate the cold air in the refrigeration cavity and the air in the internal space of the cabinet, thereby achieving the effect of refrigerating the internal space of the cabinet.
[0003] However, the circulating air contains water vapor, which will condense when it is cold. When the air flows into the refrigeration cavity and exchanges heat with the evaporator, the water vapor will condense into water droplets on the evaporator. Because the evaporator temperature is low, the water droplets condensed from the water vapor will frost on the surface of the evaporator, thereby hindering the heat exchange between the evaporator and the surrounding air, resulting in a decrease in the refrigeration effect of the air-cooled refrigerator. When the evaporator surface is seriously frosted, the liquid refrigerant cannot be effectively evaporated in the evaporator, resulting in a decrease in the evaporation pressure, and the corresponding suction pressure and discharge pressure of the compressor are also reduced, affecting the normal operation of the compressor. SUMMARY
[0004] One object of the present application is to provide an anti-frost air-cooled refrigerator to avoid the frost on the surface of the evaporator affecting the refrigeration effect of the air-cooled refrigerator.
[0005] To achieve the above object, the technical solution adopted by the present application is as follows: an anti-frost air-cooled refrigerator, comprising:
[0006] a storage cabinet, the inside of the storage cabinet being provided with a storage space;
[0007] and an air-cooled main unit for refrigerating the storage space, the air-cooled main unit being provided with a refrigeration cavity, the air-cooled main unit being provided with a compressor, a condenser, an evaporator and a refrigeration fan, the evaporator and the refrigeration fan being arranged in the refrigeration cavity, the air-cooled main unit being provided with an air outlet channel and an air return channel for connecting the refrigeration cavity and the storage space, so that the refrigeration fan can drive the cold air in the refrigeration cavity to circulate between the refrigeration cavity and the storage space, the air-cooled main unit being further provided with a drain channel for connecting the refrigeration cavity and the external environment, the first end of the drain channel being connected to the refrigeration cavity, the second end of the drain channel extending away from the refrigeration cavity, and the second end of the drain channel being lower than the first end of the drain channel.
[0008] As a preferred, the drain passage and the return air passage are arranged on the same side of the refrigeration cavity, and the drain passage is communicated with the return air passage.
[0009] As another preferred, the drain passage extends downwardly along the height direction of the refrigeration cavity, the first end is connected to the side wall of the refrigeration cavity, and the opening of the first end is flush with the bottom wall of the refrigeration cavity, so that the height position of the opening of the second end is lower than the bottom wall of the refrigeration cavity.
[0010] Further preferably, a drain hole plug is movably arranged on the second end, and the drain hole plug can be operated to open or close the opening of the second end.
[0011] Further, when the air-cooled main machine is started, the refrigeration fan is started prior to the evaporator, and the refrigeration fan generates negative pressure in the refrigeration cavity to attract the drain hole plug, so that the drain hole plug closes the second end.
[0012] Further, the refrigeration fan and the drain passage are respectively arranged on two sides of the evaporator, or the refrigeration fan, the evaporator and the drain passage are arranged in sequence from top to bottom along the height direction of the refrigeration cavity.
[0013] Further, the drain passage is arranged between the compressor and the refrigeration cavity, and the bottom of the compressor is higher than the second end.
[0014] Further, at least part of the drain passage is defined by a double-layered shell.
[0015] Further, the storage box body is detachably connected with the air-cooled main machine.
[0016] Further, the outer side of the evaporator is provided with a defrosting pipe, and the defrosting pipe is adapted to heat to eliminate frost on the surface of the evaporator.
[0017] Alternatively, the surface of the evaporator is coated with a hydrophobic coating.
[0018] Alternatively, a filter screen is arranged in the air outlet passage and / or the return air passage, and the filter screen is adapted to absorb water vapor in the circulating air.
[0019] Alternatively, a filter screen is arranged in the air outlet passage and / or the return air passage, and the filter screen is adapted to absorb water vapor in the circulating air, and the filter screen is made of hydrophilic fiber or PTFE film.
[0020] Alternatively, a plurality of return plates are arranged in the return air passage, each of the return plates is alternately arranged on the opposite two side walls of the return air passage, and each of the return plates is arranged downwardly.
[0021] Alternatively, a plurality of return plates are arranged in the return air passage, each of the return plates is arranged alternately on two opposite side walls of the return air passage, and each of the return plates is arranged obliquely downward, and a surface of each of the return plates is coated with a hydrophobic coating.
[0022] Compared with the prior art, the application has the following beneficial effects:
[0023] The air-cooled main body is provided with a drainage passage communicated with the refrigeration cavity, the surface of the evaporator is coated with a hydrophobic coating, and the evaporator is provided with a defrosting pipe outside, so that the condensed water and defrosting water can flow to the bottom of the refrigeration cavity and be discharged to the outside through the drainage passage, avoiding the condensed water remaining on the surface of the evaporator or the inner wall of the refrigeration cavity to frost; the air outlet passage and the return air passage are connected to two opposite side walls of the refrigeration cavity respectively, the drainage passage is arranged on the same side as the return air passage, and the drainage passage extends obliquely downward along the vertical direction of the refrigeration cavity, so that the air flowing in the refrigeration cavity does not contact the condensed water in the drainage passage, avoiding the circulating air between the refrigeration cavity and the storage space from bringing the condensed water back to the circulation. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a perspective view of the air-cooled refrigerator in the application.
[0025] Figure 2 It is an exploded view of the air-cooled refrigerator in the application.
[0026] Figure 3 It is a cross-sectional view of the first embodiment of the air-cooled main body in the application.
[0027] Figure 4 It is a cross-sectional view of the second embodiment of the air-cooled main body in the application.
[0028] Figure 5 It is a cross-sectional view of the third embodiment of the air-cooled main body in the application.
[0029] Figure 6 It is a cross-sectional view of the fourth embodiment of the air-cooled main body in the application.
[0030] In the figure: 100, storage box body; 200, air-cooled main body; 210, refrigeration cavity; 220, compressor; 230, condenser; 240, evaporator; 250, refrigeration fan; 260, air outlet passage; 270, return air passage; 280, drainage passage; 281, first end; 282, second end; 283, drainage hole plug; 290, defrosting pipe; 300, filter screen; 400, return plate. DETAILED DESCRIPTION
[0031] Hereinafter, the present application will be further described with reference to the specific embodiments, it should be noted that the embodiments described below or the technical features between the embodiments can be combined in any manner to form new embodiments without conflict.
[0032] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.
[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.
[0034] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0035] As shown in Figures 1-6 The present application provides an anti-frosting air-cooled refrigerator, comprising:
[0036] The storage box body 100 is internally provided with a storage space suitable for accommodating and storing various items;
[0037] and an air-cooled main machine 200 for refrigerating the storage space, the air-cooled main machine 200 is internally provided with a refrigeration cavity 210, the air-cooled main machine 200 is internally provided with a compressor 220, a condenser 230 and an evaporator 240, the evaporator 240 and a refrigeration fan 250 are arranged in the refrigeration cavity 210, the air-cooled main machine 200 is internally provided with an air outlet channel 260 and an air return channel 270 for communicating the refrigeration cavity 210 and the storage space, the air-cooled main machine 200 is detachably arranged at the bottom of the storage box body 100, so that the refrigeration cavity 210 communicates with the storage space through the air outlet channel 260 and the air return channel 270, the refrigeration fan 250 can drive the cold air in the refrigeration cavity 210 to circulate between the refrigeration cavity 210 and the storage space to refrigerate the storage space, and maintain the temperature in the storage space within a set temperature range.
[0038] It is worth mentioning that the storage box body 100 and / or the air-cooled host 200 are provided with connecting devices, and the storage box body 100 and the air-cooled host 200 can be detachably connected through the connecting devices. The connecting devices are suitable for locking and unlocking the storage box body and the air-cooled host 200.
[0039] Further, the air outlet passage 260 and the air return passage 270 are respectively arranged on the opposite two side walls of the refrigeration cavity 210. The opening of the air outlet passage 260 on the side wall of the refrigeration cavity 210 and the opening of the air return passage 270 on the side wall of the refrigeration cavity 210 are oppositely arranged. Thus, the air flowing into the refrigeration cavity 210 from the air return passage 270 can flow out of the refrigeration cavity 210 after heat exchange with the evaporator 240. The opening of the air outlet passage 260 is correspondingly arranged with the opening of the air return passage 270, so that there is no obstacle between the openings of the two passages to hinder the gas flow, improving the air circulation efficiency and thus the refrigeration efficiency.
[0040] Further, the air-cooled host 200 is provided with a drainage passage 280 for connecting the refrigeration cavity 210 and the external environment. The first end 281 of the drainage passage 280 is connected to the refrigeration cavity 210, the second end 282 of the drainage passage 280 extends away from the refrigeration cavity 210, and the second end 282 of the drainage passage 280 is lower than the first end 281 of the drainage passage 280. During the refrigeration of the storage space in the storage box body 100 by the air-cooled host 200, the hot air flowing back to the refrigeration cavity 210 from the air return passage 270 will be liquefied into condensate water droplets when heat exchanged with the evaporator 240 and absorbed on the surface of the evaporator 240 or the inner wall of the refrigeration cavity 210. The arrangement of the drainage passage 280 allows the condensate water droplets to flow into the drainage passage 280, avoiding the condensate water droplets from being absorbed on the surface of the evaporator 240 or the inner wall of the refrigeration cavity 210 for a long time to freeze into frost, hindering the heat exchange between the circulating air and the evaporator 240, and reducing the refrigeration efficiency.
[0041] Preferably, the drain passage 280 and the return air passage 270 are arranged on the same side wall of the refrigeration cavity 210, the drain passage 280 is arranged below the return air passage 270, and the drain passage 280 is communicated with the return air passage 270. The first end 281 of the drain passage 280 is connected to the side wall of the refrigeration cavity 210, and the lower edge of the opening of the first end 281 on the side wall of the refrigeration cavity 210 is flush with the bottom wall of the refrigeration cavity 210. The drain passage 280 extends downwardly along the height direction of the refrigeration cavity 210, so that the height position of the opening of the second end 282 is lower than the bottom wall of the refrigeration cavity 210. Since the flow direction of the circulating air is from the return air passage 270 to the outlet air passage 260, arranging the drain passage 280 and the return air passage 270 on the same side wall of the refrigeration cavity 210 can prevent the circulating air from contacting the condensed water drops in the drain passage 280 and bringing the condensed water drops in the drain passage 280 into the circulating air when the circulating air flows, so that the humidity of the circulating air can be reduced, and the number of condensed water drops formed by the circulating air on the surface of the evaporator 240 and the inner wall of the refrigeration cavity 210 can be reduced.
[0042] Further, the drain hole plug 283 is movably arranged on the second end 282 of the drain passage 280, and the drain hole plug 283 can be operated to open or close the opening of the second end 282. Preferably, the drain hole plug 283 is rotatably arranged on the second end 282 of the drain passage 280, and when the drain hole plug 283 is in a natural drooping state, the drain hole plug 283 opens the opening of the second end 282. When the air-cooled host 200 starts, the refrigeration fan 250 is started preferentially to the compressor 220, the refrigeration fan 250 drives the circulating air to flow to generate a negative pressure in the refrigeration cavity 210 to suck the drain hole plug 283 to close the opening of the second end 282, so that during the refrigeration of the storage space of the air-cooled host 200, the hot air in the external environment cannot flow back into the refrigeration cavity 210 through the drain passage 280 to reduce the refrigeration effect of the air-cooled host 200. When the air-cooled host 200 stops, the refrigeration fan 250 stops driving the circulating air to flow, the negative pressure in the refrigeration cavity 210 is eliminated, the drain hole plug 283 returns to the natural drooping state, the drain hole plug 283 opens the opening of the second end 282, and the condensed water drops in the drain passage 280 can be discharged to the external environment through the opening of the second end 282.
[0043] The drain passage 280 is kept between the compressor 220 and the refrigeration cavity 210, and the bottom of the compressor 220 is higher than the second end 282 of the drain passage 280. Since the bottom of the compressor 220 in the air-cooled host 200 is usually the lowest point of each circuit board and each electrical device, the second end 282 of the drain passage 280 being lower than the bottom of the compressor 220 can ensure that the condensed water drops in the drain passage 280 do not contact each circuit board and each electrical device in the air-cooled host 200, so as to prevent the water damage to each circuit board and each electrical device.
[0044] At least part of the drain passage 280 is defined by the double-layered shell to simplify the structure.
[0045] More preferably, the refrigeration cavity 210 is defined by the double-layered shell with an air layer arranged therebetween, and the structure of the double-layered shell can play a role of heat preservation, wherein at least part of the drain passage 280 is defined by the double-layered shell.
[0046] Optionally, as shown in FIG. 2, the drain passage 280, the evaporator 240 and the refrigeration fan 250 are arranged in sequence along the length direction of the air-cooled main machine 200. The refrigeration fan 250 and the drain passage 280 are respectively kept on both sides of the evaporator 240 to prevent the condensed water drops of the drain passage 280 from being brought into the circulating air by the refrigeration fan 250. Figure 3
[0047] Optionally, as shown in FIG. 3, the drain passage 280, the evaporator 240 and the refrigeration fan 250 are arranged in sequence from bottom to top along the height direction of the air-cooled main machine 200, the drain passage 280 is arranged below the evaporator 240, and the refrigeration fan 250 is arranged above the evaporator 240 to prevent the condensed water drops of the drain passage 280 from being brought into the circulating air by the refrigeration fan 250. Figure 4
[0048] In some preferred embodiments, the outer side of the evaporator 240 is provided with a defrosting pipe 290, and the defrosting pipe 290 is adapted to heat to eliminate the frost on the surface of the evaporator 240. Specifically, when the air-cooled main machine 200 works for a certain time, the air-cooled main machine 200 will be stopped for a period of time, at which time the defrosting pipe 290 can heat to eliminate the frost on the surface of the evaporator 240 caused by the residual condensed water drops, thereby avoiding the frost on the surface of the evaporator 240 to reduce the refrigeration efficiency of the air-cooled main machine 200.
[0049] In some preferred embodiments, the surface of the evaporator 240 is coated with a hydrophobic coating layer, the contact angle of the surface of the hydrophobic coating layer with water is greater than 90°, and the hydrophobic coating layer is adapted to make the condensed water drops adsorbed on the surface of the evaporator 240 slide off the surface of the evaporator 240, thereby reducing the number of the condensed water drops adsorbed on the surface of the evaporator 240. The hydrophobic coating layer can be implemented as a fluorosilicone acrylic resin and hydrophobic modified alumina particle composite coating layer, a Teflon dispersion liquid and additive composite coating layer or an aluminic ester coupling agent coating layer and the like common hydrophobic coating layers.
[0050] In some preferred embodiments, as shown in FIG. 4, the air-cooled main machine 200 is provided with a water collecting device 300 arranged on the bottom of the air-cooled main machine 200, and the water collecting device 300 is adapted to collect the condensed water drops of the drain passage 280. Figure 5 As shown, a filter screen 300 is arranged in the air outlet passage 260 and / or the air return passage 270, which can adsorb the water vapor in the circulating air flowing through the air outlet passage 260 and / or the air return passage 270, so as to reduce the humidity of the circulating air and reduce the clinker liquefied into condensed water droplets when the circulating air exchanges with the evaporator 240. The material of the filter screen 300 can be selected as a hydrophilic fiber and a PTFE film. The hydrophilic fiber is a fiber with the function of absorbing liquid water and gaseous water, which can be used to capture the small water droplets in the circulating air. The PTFE film is a polytetrafluoroethylene film, which is internally provided with a microporous structure, and the microporous structure can capture the small water droplets in the circulating air.
[0051] In some preferred embodiments, as shown in Figure 6 As shown, a plurality of deflection plates 400 are arranged in the air return passage 270, each of the deflection plates 400 is arranged on the opposite two side walls of the air return passage 270, the deflection plates 400 on the opposite two side walls are arranged alternately, and the deflection plates 400 are arranged obliquely downward. When the circulating air flows in the air return passage 270, the circulating air hits on each of the deflection plates 400, so that the circulating air changes the flow direction and separates the small water droplets in the circulating air. Further preferably, the deflection plates 400 are coated with a hydrophobic coating, so that the small water droplets on the surface of the deflection plates 400 will flow downward along the deflection plates 400 to the bottom of the refrigeration cavity 210 without being adsorbed on the deflection plates 400. The small water droplets flowing to the bottom of the refrigeration cavity 210 will further flow into the drain passage 280.
[0052] The above describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.
Claims
1. An anti-frosting air-cooled refrigerator, characterized by, The utility model provides a refrigeration device for a storage box, comprising: a storage box body, the inside of the storage box body is provided with a storage space; and a wind-cooled main machine for refrigerating the storage space, the wind-cooled main machine is provided with a refrigeration cavity, the wind-cooled main machine is provided with a compressor, a condenser, an evaporator and a refrigeration fan, the evaporator and the refrigeration fan are provided in the refrigeration cavity, the wind-cooled main machine is provided with an air outlet channel and a return air channel for connecting the refrigeration cavity and the storage space, and then the refrigeration fan can drive the cold air in the refrigeration cavity to circulate between the refrigeration cavity and the storage space, the wind-cooled main machine is further provided with a drain channel for connecting the refrigeration cavity and the external environment, the first end of the drain channel is connected to the refrigeration cavity, the second end of the drain channel extends away from the refrigeration cavity, and the second end of the drain channel is lower than the first end of the drain channel.
2. The air-cooled refrigerator according to claim 1, wherein The drain channel and the return air channel are provided on the same side of the refrigeration cavity, and the drain channel is communicated with the return air channel.
3. The air-cooled refrigerator as claimed in claim 2, wherein The drain channel extends downward along the height direction of the refrigeration cavity, the first end is connected to the side wall of the refrigeration cavity, and the opening of the first end is flush with the bottom wall of the refrigeration cavity, so that the height position of the opening of the second end is lower than the bottom wall of the refrigeration cavity.
4. The air-cooled refrigerator as claimed in claim 2, wherein A drain hole plug is movably arranged on the second end, and the drain hole plug can be operated to open or close the opening of the second end.
5. The air-cooled refrigerator according to claim 4, wherein When the wind-cooled main machine is started, the refrigeration fan is started preferentially to the evaporator, the refrigeration fan generates negative pressure in the refrigeration cavity to attract the drain hole plug, so that the drain hole plug closes the second end.
6. The air-cooled refrigerator as claimed in claim 1, wherein The refrigeration fan and the drain channel are respectively kept on both sides of the evaporator, or the refrigeration fan, the evaporator and the drain channel are arranged in sequence from top to bottom along the height direction of the refrigeration cavity.
7. The air-cooled refrigerator as claimed in claim 1, wherein The drain channel is kept between the compressor and the refrigeration cavity, and the bottom of the compressor is higher than the second end.
8. The air-cooled refrigerator as claimed in claim 1, wherein At least part of the drain channel is defined by a double-layer shell.
9. The air-cooled refrigerator as claimed in claim 1, wherein The storage box body and the wind-cooled main machine are detachably connected.
10. The air-cooled refrigerator as claimed in claim 1, wherein The outer side of the evaporator is provided with a defrosting pipe adapted to heat to eliminate frost on the surface of the evaporator. Or, the surface of the evaporator is coated with a hydrophobic coating. Or, a filter screen is arranged in the air outlet channel and / or the return air channel, and the filter screen is adapted to adsorb water vapor in circulating air. Or, a filter screen is arranged in the air outlet channel and / or the return air channel, and the filter screen is adapted to adsorb water vapor in circulating air, and the filter screen is made of hydrophilic fiber or PTFE film. Or, a plurality of return bend plates are arranged in the return air channel, each return bend plate is alternately arranged on the opposite two side walls of the return air channel, and each return bend plate is inclined downward. Or, a plurality of return bend plates are arranged in the return air channel, each return bend plate is alternately arranged on the opposite two side walls of the return air channel, and each return bend plate is inclined downward, and the surface of each return bend plate is coated with a hydrophobic coating.