CN215765967U - Air-cooled refrigerator - Google Patents

Abstract

The present disclosure relates to an air-cooled refrigerator, which includes: a cabinet defining therein an evaporator chamber and a refrigerating chamber; an evaporator disposed within the evaporator chamber and configured to cool an airflow therethrough to form a cooled airflow; a return duct assembly configured to direct airflow within the refrigerated compartment to the evaporator; and the cooling air duct assembly is configured to flow through the cooling air flow to carry out heat exchange cooling on the air return duct assembly. Through setting up cooling air duct assembly, thereby the cooling air current of evaporimeter exhaust flows through cooling air duct assembly and carries out the heat exchange cooling to return air duct assembly, thereby cool down the return air, make return air duct internal temperature below the dew point temperature, make the great air of humidity of retrieving from the walk-in condensation in the return air duct, reduce the humidity of air in the return air duct, and then reduce the rate of frosting of vapor on the evaporimeter, increase the cycle time of defrosting, reduce the frequent frequency of defrosting, reduce the refrigerator energy consumption, practice thrift user use cost.

Description

Air-cooled refrigerator

Technical Field

The present disclosure relates to an air-cooled refrigerator.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The existing refrigerators are generally divided into air-cooled refrigerators and direct-cooled refrigerators according to different refrigeration modes. Compared with a direct-cooling refrigerator, the air-cooling refrigerator has obvious advantages, such as small temperature fluctuation, higher temperature uniformity, no need of manual defrosting and the like, and therefore the market share of the air-cooling refrigerator is higher and higher. However, during the cooling process, the air in the compartment passes through the evaporator at a low temperature, and the water vapor in the air condenses into frost on the evaporator.

At present, the air-cooled refrigerator has an automatic defrosting function, and the defrosting function is realized mainly by heating a heating pipe or a heating wire near an evaporator to raise the temperature so that frost in an evaporator chamber is melted into water and discharged by a water pipe. And through sensor and control panel, automatic defrosting is realized to automatic the opening heater after fixed defrosting cycle or detect room temperature and reach certain condition, and this kind heats through the forceful electric power income heating pipe and makes the energy consumption of refrigerator increase, and more energy-conserving method at present mainly is through the algorithm or the induction method of more accurate calculation defrosting cycle, and the control heater is opened and shut down in order to reduce unnecessary defrosting process, still can produce extra energy consumption.

SUMMERY OF THE UTILITY MODEL

One technical problem to be solved by the present disclosure is: the automatic defrosting of air-cooled refrigerator makes the energy consumption higher, and based on this, this disclosure provides an air-cooled refrigerator, can effectively reduce the defrosting energy consumption, practices thrift user use cost.

Some embodiments of the present disclosure provide an air-cooled refrigerator including: a cabinet defining therein an evaporator chamber and a refrigerating chamber; an evaporator disposed within the evaporator chamber and configured to cool an airflow therethrough to form a cooled airflow; a return duct assembly configured to direct airflow within the refrigerated compartment to the evaporator; and the cooling air duct assembly is configured to flow through the cooling air flow to carry out heat exchange cooling on the air return duct assembly.

In some embodiments, the return air duct assembly and the cooling air duct assembly are provided independently.

In some embodiments, the outer profile of the cooling air duct assembly is configured to snap over the outer wall of the return air duct assembly and maintain a seal.

In some embodiments, a plurality of ribs are arranged inside the cooling air duct assembly to form a continuous curved flow passage.

In some embodiments, the cooling device further comprises a cold accumulation member attached to the inner wall of the pipe of the air return duct assembly, and the cold accumulation member is located at the position of the air return duct assembly corresponding to the cooling duct assembly.

In some embodiments, a drain hole is formed at the bottom of the return air duct assembly, and a backflow prevention mechanism is arranged at the drain hole.

In some embodiments, the backflow prevention mechanism is configured as an S-shaped pipe or a U-shaped pipe bent downward.

In some embodiments, the return air duct assembly sequentially comprises a return air inlet, a return air long pipeline, an elbow joint, a return air short pipeline and a return air outlet along the air flow direction, the return air outlet is communicated with the inlet of the evaporator, and the outer wall of the cooling air duct assembly is attached to the outer wall of the return air long pipeline.

In some embodiments, the air inlet of the cooling air duct assembly is communicated with the outlet of the evaporator, and the air outlet of the cooling air duct assembly is communicated with the inlet of the evaporator.

In some embodiments, the air-cooled refrigerator further comprises: the humidity sensor is arranged at a return air inlet of the return air duct assembly; the first temperature sensor is arranged at a return air inlet of the return air duct assembly; the second temperature sensor is arranged in the air channel of the air return channel assembly and corresponds to the position of the cooling air channel assembly; and a controller configured to: and calculating to obtain a dew point temperature Td according to the relative humidity RH detected by the humidity sensor and the return air temperature T1 detected by the first temperature sensor, conducting the cooling air channel assembly when the air channel temperature T2 detected by the second temperature sensor is greater than the dew point temperature Td, and closing the cooling air channel assembly when the air channel temperature T2 detected by the second temperature sensor is less than or equal to the dew point temperature Td.

In the technical scheme of this disclosure, through setting up cooling air duct assembly, thereby the cooling air current of evaporimeter exhaust flows through cooling air duct assembly and carries out the heat exchange cooling to return air duct assembly, thereby cool down the return air, make return air duct inside temperature to below the dew point temperature, make the great air of humidity that retrieves from the walk-in condense in the return air duct, the vapor content in the return air has been reduced, reduce the vapor volume that touches the evaporimeter in the unit interval, with the rate of frosting that reduces the evaporimeter, increase the cycle time of defrosting, reduce the frequent time of defrosting, reduce the refrigerator energy consumption, practice thrift user use cost.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a return duct assembly in some embodiments of an air-cooled refrigerator according to the present disclosure;

fig. 2 to 4 are schematic structural views of cooling air duct assemblies at different viewing angles in some embodiments of the air-cooled refrigerator of the present disclosure;

FIG. 5 is a schematic view of the inner flow passages of the cooling air duct assembly in some embodiments of the disclosed air-cooled refrigerator;

FIG. 6 is a schematic view of the assembly of a return air duct assembly and a cooling air duct assembly in some embodiments of the air-cooled refrigerator of the present disclosure;

FIG. 7 is an exploded view of the return air duct assembly and the cooling air duct assembly in some embodiments of the air-cooled refrigerator of the present disclosure;

FIG. 8 is an assembled cross-sectional view of a return air duct assembly and a cooling air duct assembly in some embodiments of the disclosed air-cooled refrigerator;

FIG. 9 is a schematic view of the overall assembly of some embodiments of the air-cooled refrigerator of the present disclosure;

FIG. 10 is a complete machine assembly side sectional view of some embodiments of the air-cooled refrigerator of the present disclosure;

fig. 11 is a front sectional view of the complete machine assembly of some embodiments of the air-cooled refrigerator of the present disclosure.

Description of the reference numerals

1. An evaporator chamber; 2. a refrigerating chamber; 3. refrigerating ventilation pipes; 4. an evaporator; 5. a fan; 11. a return air duct assembly; 12. a cooling air duct assembly; 13. a cold storage member; 14. a cooling air return pipe; 15. a backflow prevention mechanism; 111. an air return inlet; 112. a long air return pipeline; 113. a drain hole; 114. a pipe bending joint; 115. a short return air pipeline; 116. an air return outlet; 121. an air inlet; 122. an air outlet; 123. a rib plate.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, the particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

Because the refrigerating chamber is frequently used by users, and the temperature and the humidity of the refrigerating chamber are high, the dew point temperature of air recovered from the refrigerating chamber is high, and the temperature of an evaporator is far lower than the dew point temperature, so that direct frost condensation is caused; the temperature of the freezing chamber is low, the water vapor is basically in a condensation state, the return air of the freezing chamber is relatively dry and the dew point temperature is low, and the return air does not condense on the contrary when contacting with the evaporator, so the recovered air of the refrigerating chamber is a main source for frosting the evaporator.

Based on this, as shown in fig. 1 to 11 in conjunction, some embodiments of the present disclosure provide an air-cooled refrigerator including: the refrigerator comprises a box body, an evaporator 4, a return air duct assembly 11 and a cooling air duct assembly 12, wherein an evaporator chamber 1, a freezing chamber and a refrigerating chamber 2 are defined in the box body; an evaporator 4 is arranged in the evaporator chamber 1 and is configured to cool an air flow passing therethrough to form a cooled air flow, part of which is conveyed to the refrigerating chamber 2 through the refrigerating ventilation duct 3; the return duct assembly 11 is configured to divert the airflow inside the refrigerating compartment 2 to the evaporator 4; the cool-down air duct assembly 12 is configured to flow a cooling air flow to perform heat exchange cool-down on the return air duct assembly 11.

In this illustrative embodiment, through setting up cooling wind channel subassembly 12, thereby the cooling air flow that evaporimeter 4 exhaust flows through cooling wind channel subassembly 12 carries out the heat exchange cooling to return air duct subassembly 11, thereby cool down the return air and cool down, make the vapor in the recovered air at return air duct cooling area A condensation, the vapor content in the return air has been reduced, reduce the vapor volume that contacts the evaporimeter in the unit interval, with the rate of frosting that reduces the evaporimeter, increase the cycle time of defrosting, reduce the frequency of defrosting, reduce the refrigerator energy consumption, practice thrift user use cost.

In some embodiments, as shown in fig. 1, the return air duct assembly 11 sequentially includes a return air inlet 111, a return air long duct 112, an elbow joint 114, a return air short duct 115, and a return air outlet 116 along the airflow direction, the return air inlet 111 communicates with the air outlet of the refrigerating compartment 2, the return air outlet 116 communicates with the inlet of the evaporator 4, and the outer wall of the cooling air duct assembly 12 is attached to the outer wall of the return air long duct 112. The cooling air duct assembly 12 is arranged on the long return air pipeline 112, so that the contact area of heat exchange is increased, and the cooling efficiency is improved.

In some embodiments, as shown in fig. 1 to 8, the air return duct assembly 11 and the cooling air duct assembly 12 are independently arranged, that is, the air return duct in the air return duct assembly 11 and the cooling air duct in the cooling air duct assembly 12 only perform heat exchange in the cooling area, and do not perform air flow exchange.

In some embodiments, as shown in fig. 2, 9 and 10, a fan 5 is disposed in the evaporator chamber 1, an air inlet 121 of the cooling air duct assembly 12 communicates with an outlet of the evaporator 4, an air outlet 122 of the cooling air duct assembly 12 communicates with an inlet of the evaporator 4, and the fan 5 is configured to blow air to perform strong convection to blow cooling air flow discharged from the evaporator 4 into the cooling air duct assembly 12, and the cooling air flow flows to flow direction as shown in fig. 5, is discharged from the air outlet 122 to the evaporator chamber 1 after performing heat exchange, and then enters the evaporator 4 to perform re-cooling, thereby forming a cooling air circulation of the cooling air duct assembly 12.

As shown in fig. 2 to 8, in some embodiments, the outer contour of the cooling air duct assembly 12 is configured to be able to be buckled above the outer wall of the return air duct assembly 11 and to maintain a seal, which can increase the contact area for heat exchange and improve the cooling efficiency.

Similarly, as shown in fig. 2 to 5, in some embodiments, a plurality of rib plates 123 are arranged inside the cooling air duct assembly 12 to form a continuous curved flow channel, the curved flow channel enables cooling air to flow sufficiently in the cooling air duct, the shell of the cooling air duct assembly 12, the outer wall of the return air duct assembly 11, and the rib plates 123 form a closed circulating air duct, and the flow direction of the cooling air is as shown in fig. 5, so that the cooling air duct assembly 12 can enable the return air duct to cool sufficiently, thereby improving the cooling efficiency. In some embodiments, the curved flow passage comprises an S-shaped flow passage, a folded flow passage or a labyrinth flow passage, so as to enable the cooling air flow to fully flow in the cooling air duct.

As shown in fig. 7 and 8, in some embodiments, the air-cooled refrigerator further includes a cold accumulation member 13 attached to the inner wall of the duct of the air return duct assembly 11, and the cold accumulation member 13 is located at a position of the air return duct assembly 11 corresponding to the cooling air duct assembly 12, so that the cooling is more rapid. In some embodiments, the cold accumulation member 13 includes a cold accumulation aluminum foil, which is a thin aluminum foil and is the main cooling object of the cooling air duct, the aluminum foil has better heat conductivity than the plastic member, and the arrangement of the cold accumulation aluminum foil in the air return duct can make the cooling capacity concentrated in the range of the aluminum foil, and the cooling is more rapid.

As shown in fig. 8, a part of the region concentrated in the return air duct can be a cooling region a by the interaction between the cooling air duct assembly 12 and the cold storage element 13.

In some embodiments, as shown in fig. 6, the air-cooled refrigerator further includes a cooling return air pipe 14, the air outlet 122 communicates with the return air outlet 116 through the cooling return air pipe 14, so as to communicate with the inlet of the evaporator 4, and the cooling return air pipe 14 is a flexible pipe, which has high practicability.

As shown in fig. 1, in some embodiments, a drain hole 113 is formed at the bottom of the return air duct assembly 11, and as shown in fig. 1 and 8, a backflow prevention mechanism 15 is disposed at the drain hole 113. The vapor in the air that the low temperature of cold-storage piece 13 of return air duct inner wall made the recovery can be on its surface condensation, and the drop of water can be because self gravity and adsorptivity flow into wash port 113 along the inner wall to in the drain pipe inflow anti-return mechanism 15 by the below, prevent that the return air from inhaling outside air, the water of condensation will also be through the anti-return mechanism 15 outside the refrigerator of discharging, perhaps retrieve in order to utilize, prevent that the return air duct from dripping water and influence user experience.

As shown in fig. 8, in some embodiments, the backflow prevention mechanism 15 is configured as an S-shaped pipe or a U-shaped pipe bent downward, and partially downed frost water can seal the pipe inside the S-shaped pipe or the U-shaped pipe, so that the backflow wind is prevented from sucking in the outside air, and the backflow prevention mechanism is simple in structure and has high feasibility of implementation. In other embodiments, the backflow prevention mechanism 15 is configured to enable the defrosted water to form a duct of a closed structure therein, thereby achieving backflow prevention.

In some embodiments, the air-cooled refrigerator further comprises a humidity sensor, a first temperature sensor, a second temperature sensor, and a controller, wherein the humidity sensor is disposed at the return air inlet 111 of the return air duct assembly 11 for detecting the relative humidity RH at the return air inlet 111; a first temperature sensor is provided at the return air inlet 111 of the return air duct assembly 11 for detecting a return air temperature T1 at the return air inlet 111; the second temperature sensor is arranged in the air duct of the air return duct assembly 11 at a position corresponding to the cooling air duct assembly 12 and is used for detecting the air duct temperature T2; the controller is configured to: and calculating to obtain a dew point temperature Td according to the relative humidity RH detected by the humidity sensor and the return air temperature T1 detected by the first temperature sensor, conducting the cooling air duct component 12 when the air duct temperature T2 detected by the second temperature sensor is greater than the dew point temperature Td, and closing the cooling air duct component 12 when the air duct temperature T2 detected by the second temperature sensor is less than or equal to the dew point temperature Td.

The dew point temperature is related to the ambient pressure, ambient temperature, and relative humidity, and the dew point temperature Td can be calculated from the return air temperature T1 and the return air relative humidity RH, considering that the pressure of the return air duct in the return air duct assembly 11 is not changed, and the calculation is known to those skilled in the art and thus will not be described in detail.

Through setting up humidity transducer, first temperature sensor, second temperature sensor and controller, the temperature in the return air duct can be adjusted in the forced air cooling refrigerator in a controllable way for the temperature can dynamic adjustment to dew point temperature Td, makes the vapor of recovered air at return air duct cooling zone territory condensation, reaches the purpose of dehumidification, but also avoided the cooling to hang down excessively to make the condensation freeze and block up the return air duct, guarantees the circulation stability in return air duct.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (10)

1. An air-cooled refrigerator, comprising:

a box body defining an evaporator chamber (1) and a refrigerating chamber (2) therein;

an evaporator (4) disposed within the evaporator chamber (1) and configured to cool an airflow therethrough to form a cooled airflow;

a return air duct assembly (11) configured to divert the air flow inside the refrigerating compartment (2) to the evaporator (4); and

a cooling air duct assembly (12) configured to flow a cooling air flow to perform heat exchange cooling on the air return duct assembly (11).

2. The air-cooled refrigerator according to claim 1, wherein the return air duct assembly (11) and the cool air duct assembly (12) are provided independently.

3. The air-cooled refrigerator according to claim 1, wherein the outer contour of the cooling air duct assembly (12) is configured to be able to snap over the outer wall of the return air duct assembly (11) and maintain a seal.

4. The air-cooled refrigerator according to claim 1, wherein a plurality of ribs (123) are provided inside the cooling air duct assembly (12) to form a continuous curved flow path.

5. The air-cooled refrigerator according to claim 1, further comprising a cold accumulation member (13) attached to an inner wall of the duct of the return duct assembly (11), wherein the cold accumulation member (13) is located at a position of the return duct assembly (11) corresponding to the cooling duct assembly (12).

6. The air-cooled refrigerator as claimed in claim 1, wherein a drain hole (113) is formed at the bottom of the return air duct assembly (11), and a backflow preventing mechanism (15) is provided at the drain hole (113).

7. The air-cooled refrigerator according to claim 6, wherein the backflow preventing mechanism (15) is configured as an S-shaped duct or a U-shaped duct bent downward.

8. The air-cooled refrigerator as claimed in claim 1, wherein the return air duct assembly (11) comprises a return air inlet (111), a long return air duct (112), an elbow joint (114), a short return air duct (115) and a return air outlet (116) in sequence along the airflow direction, the return air outlet (116) is communicated with the inlet of the evaporator (4), and the outer wall of the cooling air duct assembly (12) is attached to the outer wall of the long return air duct (112).

9. The air-cooled refrigerator according to claim 1, wherein the air inlet (121) of the cooling air duct assembly (12) is communicated with the outlet of the evaporator (4), and the air outlet (122) of the cooling air duct assembly (12) is communicated with the inlet of the evaporator (4).

10. The air-cooled refrigerator according to claim 1, further comprising:

a humidity sensor disposed at a return air inlet (111) of the return air duct assembly (11);

a first temperature sensor disposed at a return air inlet (111) of the return air duct assembly (11);

the second temperature sensor is arranged in the air duct of the air return duct assembly (11) at a position corresponding to the cooling air duct assembly (12); and

a controller configured to: and calculating to obtain a dew point temperature Td according to the relative humidity RH detected by the humidity sensor and the return air temperature T1 detected by the first temperature sensor, turning on the cooling air duct component (12) when the air duct temperature T2 detected by the second temperature sensor is greater than the dew point temperature Td, and turning off the cooling air duct component (12) when the air duct temperature T2 detected by the second temperature sensor is less than or equal to the dew point temperature Td.

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