CN108362066B

CN108362066B - Fan shielding device and refrigerator

Info

Publication number: CN108362066B
Application number: CN201810136612.1A
Authority: CN
Inventors: 赵彩云; 张书锋; 廖耀军
Original assignee: Haier Smart Home Co Ltd
Current assignee: Haier Smart Home Co Ltd
Priority date: 2018-02-09
Filing date: 2018-02-09
Publication date: 2020-10-09
Anticipated expiration: 2038-02-09
Also published as: CN108362066A

Abstract

The invention discloses a fan shielding device of a refrigerator, which comprises: the refrigerator comprises a box body, a refrigerating chamber and a refrigerating chamber, wherein the box body is limited with a target refrigerating chamber, and an air duct leading to the chamber is arranged at the rear part of the target refrigerating chamber; the compressor is arranged at the bottom of the box body; the evaporator is arranged in an evaporator cavity of the box body and can provide cold energy for the target refrigeration chamber; the fan is arranged in a fan cavity above the evaporator and used for introducing cold air from the evaporator into the air duct; the fan comprises a blade and a driving shaft driving the blade to rotate, the fan shielding device comprises a fan cover covering the periphery of the blade, a threaded section is arranged on the driving shaft, the fan cover is matched with the threaded section, the fan is closed, and the fan cover disconnects the evaporator cavity from the air channel; and the fan is started, and the fan cover is driven by the threaded section to axially move along the driving shaft so as to allow the evaporator cavity to be communicated with the air duct through the fan cavity.

Description

Fan shielding device and refrigerator

Technical Field

The invention relates to the field of household appliances, in particular to a fan shielding device and a refrigerator.

Background

In the prior art, a refrigerator generally refers to a single-door, double-door double-temperature, three-door three-temperature, cabinet type multi-door and other electric refrigerators, and generally has an independent freezing chamber and an outer door of the freezing chamber so as to be stored separately according to different storage temperatures. The refrigeration principle of such a refrigerator-freezer is classified into a direct cooling type and an air cooling type. In a direct-cooling refrigeration system, a flow direction of a refrigerant is controlled by a solenoid valve, and the refrigerant is supplied to an evaporator of each refrigerating (freezing) chamber to cool each space to a desired temperature. The air-cooled refrigeration and freezing needs to be provided with corresponding air ducts for supplying air to all spaces.

Since the air-cooled refrigerator has the advantages of high efficiency and frost-free, more and more users begin to use the air-cooled refrigerator at the present stage. After the frostless refrigerator is used for a period of time, the evaporator surface frosts, frost gradually becomes thick, cause the air in the refrigerator not smooth, the refrigeration effect variation, refrigerating system need stop this moment, use the heater of arranging on the evaporator to change the frost, change the frost in-process at the refrigerator, because can not refrigerate and the influence of heater strip, the temperature of storage room article rises again, not only influence the refrigerator and use this moment, and long-term past, the storage life of the indoor article in storage room can be influenced in the alternative of temperature.

The refrigerator is in the use, because contain moisture in the air in the storing compartment and the article of placing, air in the compartment is carrying out the heat transfer in-process with the refrigerator evaporimeter, moisture meets the condensation and ties at the evaporimeter surface, and the temperature on evaporimeter surface is less than zero degree usually, the comdenstion water that comes too late to drop from the evaporimeter surface condenses into ice (frost), after the certain time, the frost on evaporimeter surface can become thick gradually, cause the air in the refrigerator unsmooth, refrigeration effect variation increases power consumption simultaneously. At this time, defrosting is needed, and the existing defrosting modes have three types: 1. naturally defrosting; the power supply is pulled off, the door of the refrigerator is opened, and the temperature of the storage compartment and the external temperature are naturally balanced, so that the aim of defrosting is fulfilled. The disadvantages are that; the time is long, and the refrigerator can not be used during defrosting. 2. Heating for defrosting; and a heat source is arranged in the area around the evaporator to achieve the aim of defrosting. The disadvantages are that; other energy sources are consumed, and certain influence is exerted on the articles in the storage room. 3. Defrosting by shoveling frost; and (4) pulling out the power supply, and using a plastic flat shovel to shovel off frost blocks on the inner container wall of the freezing chamber for defrosting. The disadvantages are that; there is a risk of damaging the device and the refrigerator cannot be used during defrosting.

The refrigeration evaporator and the refrigeration space in the existing double-system refrigeration and freezing refrigerator are always communicated through an air duct, so that the refrigeration temperature fluctuation is large, the existing refrigeration micro-channel technology controls a turntable to supply air to corresponding refrigeration air ports through a motor, the motor is adopted for driving, the power consumption is large, and the cost of the motor is high; the motor can generate noise in the rotating process, and the noise is contrary to the low noise required by the refrigerator.

Disclosure of Invention

The invention aims to provide a fan shielding device, which can separate an evaporator from a refrigerating space during defrosting, has lower cost and can save the space of a refrigerator.

In order to achieve the above object, the present invention provides a fan shielding apparatus of a refrigerator, the refrigerator including: the refrigerator comprises a box body, a refrigerating chamber and a refrigerating chamber, wherein the box body is limited with a target refrigerating chamber, and an air duct leading to the chamber is arranged at the rear part of the target refrigerating chamber; the compressor is arranged at the bottom of the box body; the evaporator is arranged in an evaporator cavity of the box body and can provide cold energy for the target refrigeration chamber; the fan is arranged in a fan cavity above the evaporator and used for introducing cold air from the evaporator into the air duct; the fan comprises a blade and a driving shaft driving the blade to rotate, the fan shielding device comprises a fan cover covering the periphery of the blade, a threaded section is arranged on the driving shaft, the fan cover is matched with the threaded section, the fan is closed, and the fan cover cuts off the communication between the evaporator cavity and the air channel; the fan is started, and the fan cover is driven by the threaded section to move axially along the driving shaft so as to allow the evaporator cavity to be communicated with the air duct through the fan cavity.

As a further development of an embodiment of the invention, the drive shaft is arranged at an angle to the horizontal, the fan is switched off, and the fan guard can be reset along the threaded section under the influence of gravity.

As a further improvement of an embodiment of the invention, the drive shaft is angled between 20 and 40 degrees relative to horizontal.

As a further improvement of an embodiment of the present invention, the drive shaft is angled at 35 degrees relative to a horizontal position.

As a further improvement of an embodiment of the present invention, the target refrigerating compartment is configured as a freezing compartment, and the fan shielding device is provided at a rear portion of the freezing compartment.

As a further improvement of an embodiment of the present invention, the drive shaft is disposed in parallel with respect to a horizontal position, the fan is turned backward for a predetermined time after stopping rotation of the fan, and the fan guard is capable of being returned along the threaded section by the reverse rotation of the fan.

As a further improvement of an embodiment of the present invention, the preset time is 0.5 seconds to 2 seconds.

As a further improvement of an embodiment of the present invention, the preset time is 1 second.

As a further improvement of an embodiment of the present invention, the fan cavity is in communication with the air duct, and the fan guard is configured to disconnect or allow communication between the fan cavity and the evaporator cavity.

The invention also relates to a refrigerator comprising the fan shielding device in any one of the above embodiments.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the fan shielding device is arranged, so that the evaporator cavity is disconnected from the air duct leading to the refrigerating chamber when the evaporator defrosts, the temperature of the refrigerating chamber is not influenced, the stability of the temperature of the refrigerating space is facilitated, and the influence of the heating wire on the refrigerating space in the defrosting process of the air-cooled refrigerator is reduced. The power consumption of the fan shielding device is low in the opening and closing processes; the fan shielding device does not need to be driven by a separate motor, so that the space is saved; the production cost of the fan shielding device is reduced.

Drawings

FIG. 1 is a schematic rear sectional view of a refrigerator in accordance with a preferred first embodiment of the present invention with the evaporator chamber disconnected from the air chute;

FIG. 2 is a view similar to FIG. 1, but with the evaporator chamber in communication with the air chute via the fan chamber;

FIG. 3 is a schematic rear sectional view of a refrigerator in accordance with a preferred second embodiment of the present invention with the evaporator chamber disconnected from the air chute;

fig. 4 is similar to fig. 3, with the evaporator chamber in communication with the air chute via the fan chamber.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments thereof as illustrated in the accompanying drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

As shown in fig. 1 and 2, a first preferred embodiment of the present invention discloses a refrigerator, which includes a cabinet defining at least one refrigerating compartment, which is exemplified as a freezing compartment 20 in this embodiment, an evaporator (not shown) disposed in an evaporator chamber at the rear of the freezing compartment of the cabinet, and a blower fan 40 disposed in a blower fan chamber 41, wherein the blower fan chamber 41 is located at the upper portion of the evaporator chamber and can communicate with the evaporator chamber. The evaporator may be any one of known evaporators, such as one of a fin evaporator, a wire tube evaporator, a roll-bond evaporator and a plate tube evaporator. In this embodiment, the refrigerator forms a compression refrigeration cycle system by a compressor (not shown), a condenser (not shown) and an evaporator, and the fan 40 introduces cold air from the evaporator into the freezing chamber 20 through the air duct 21 at the rear of the freezing chamber 20, that is, the fan 40 and the circulating air duct leading to the freezing chamber 20 form a cold air circulation system. Certainly, the refrigerator may further include other refrigerating compartments such as a refrigerating compartment and a temperature-changing compartment, and when the refrigerator works, the compressor pushes the refrigerant to circulate, the refrigerant entering the evaporator absorbs heat and evaporates, and the fan 40 sends the refrigerant to the corresponding refrigerating compartment through the circulating air duct. Typically, the compressor is located at the bottom of the cabinet and the evaporator is located in the evaporator chamber at the rear of the freezer compartment of the cabinet to provide cooling to the fresh food and freezer compartments. A defroster (not shown) is provided at a lower portion of the evaporator, and a compressor is provided at a rear side of a bottom of the refrigerator. The refrigerating chamber and the freezing chamber are arranged from top to bottom, namely, the direction in which the refrigerating chamber and the freezing chamber are arranged from top to bottom is defined as the height direction of the refrigerator, the direction in which a user opens the refrigerator to face and back to the refrigerator door is defined as the front-back direction of the refrigerator, and the direction perpendicular to the height direction and the front-back direction is defined as the width direction of the refrigerator.

In this embodiment, the refrigerator further includes a fan shielding device cooperating with the fan 40, the fan 40 includes a blade 42 and a driving shaft 43 driving the blade 42 to rotate, the fan shielding device includes a fan cover 50 covering the periphery of the blade 42, a threaded section 431 is provided on the driving shaft 43, the fan cover 50 cooperates with the threaded section 431, as shown in fig. 1, the fan 40 is closed, and the fan cover 50 disconnects the evaporator cavity from the air duct 21, that is, the fan cover 50 is at a first position; as shown in fig. 2, with the fan 40 turned on, the fan guard 50 is moved axially along the drive shaft by the wind carried by the threaded segment 431 to allow the evaporator chamber to communicate with the air chute 21 via the fan chamber 41, with the fan guard 50 in the second position, and cool air from the evaporator can be moved from the air chute 21 into the freezer compartment 20 in the direction indicated by the arrow by the fan 40.

Preferably, the drive shaft 43 is angled with respect to the horizontal, the fan 40 is turned off, and the fan guard 50 can be repositioned along the threaded section 431 under the influence of gravity, that is, the fan guard 50 returns to a position in which the evaporator chamber is disconnected from the air chute 21, the fan guard 50 is moved by the fan 40 from a first position in which the evaporator chamber is disconnected from the air chute 21 to a second position in which the evaporator chamber is allowed to communicate with the air chute 21, and the movement from the second position to the first position is generated under its own weight. The fan 40 is closed, the evaporator can be started to defrost, the defrosting device generally adopts a heating wire to disconnect the evaporator cavity from the air duct 21, and the temperature rise during heating and defrosting is prevented from influencing the temperature in the refrigerating chamber. The communication between the fan cavity 41 and the air duct 21 can be disconnected in two ways, or the communication between the evaporator cavity and the fan cavity 41 can be disconnected by moving the fan cover. In this embodiment, the drive shaft is angled between 20 and 40 degrees, preferably 35 degrees, from horizontal. In addition, in order to more reliably reset the fan guard, a torsion spring may be provided between the driving shaft 43 and the fan guard 50, and when the fan 40 is stopped, the fan guard 50 is more easily reset under the dual actions of its own weight and the elastic force of the torsion spring.

The fan shielding device does not need to be driven by a motor, refrigeration of the refrigeration chamber is started through starting control of the fan 40, the evaporator cavity and the air channel leading to the refrigeration chamber are disconnected when the evaporator defrosts, the temperature of the refrigeration chamber cannot be affected, the stability of the temperature of the refrigeration space is facilitated, and the influence of a heating wire on the refrigeration space in the defrosting process of the air-cooled refrigerator is reduced. The power consumption of the fan shielding device is low in the opening and closing processes; the fan shielding device does not need to be driven by a separate motor, so that the space is saved; the production cost of the fan shielding device is reduced.

Referring to fig. 3 and 4, in a preferred second embodiment of the present invention, in which the fan 40 includes a blade 42 and a driving shaft 43 for driving the blade 42 to rotate, the driving shaft 43 is disposed parallel to the horizontal, a threaded section 431 is provided on the driving shaft 43, and the fan cover 50 is engaged with the threaded section 431, as shown in fig. 3, the fan 40 is turned off, and the fan cover 50 disconnects the evaporator chamber from the air duct 21, that is, the fan cover 50 is in the first position; as shown in fig. 4, with the fan 40 turned on, the fan guard 50 is moved axially along the drive shaft by the wind carried by the threaded segment 431 to allow the evaporator chamber to communicate with the air chute 21 via the fan chamber 41, with the fan guard 50 in the second position, and cool air from the evaporator can be moved from the air chute 21 into the freezer compartment 20 in the direction indicated by the arrow by the fan 40. In this embodiment, after the fan 40 stops rotating and then rotates reversely for a preset time, the fan guard 50 can be reset along the threaded section under the reverse rotation of the fan 40, that is, the fan guard 50 is driven by the rotation of the fan 40 from the first position at which the evaporator cavity is disconnected from the air duct 21 to the second position at which the evaporator cavity is allowed to communicate with the air duct 21 and from the second position to the first position, and the preset time for the reverse rotation of the fan is 0.5 seconds to 2 seconds, preferably 1 second.

The invention solves the opening and closing of the air port of the refrigerator by using the fan shielding device which is safe, reliable, low in cost and low in energy consumption, separates the evaporator from a refrigerating space and reduces the air circulation during defrosting. And the fan shielding device arranged on the refrigerator can reduce the cost of the refrigerator and the energy consumption of the refrigerator.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A fan shield apparatus of a refrigerator, the refrigerator comprising:

the refrigerator comprises a box body, a refrigerating chamber and a refrigerating chamber, wherein the box body is limited with a target refrigerating chamber, and an air duct leading to the chamber is arranged at the rear part of the target refrigerating chamber;

the compressor is arranged at the bottom of the box body;

the evaporator is arranged in an evaporator cavity of the box body and can provide cold energy for the target refrigeration chamber;

the fan is arranged in a fan cavity above the evaporator and used for introducing cold air from the evaporator into the air duct;

the method is characterized in that: the fan comprises a blade and a driving shaft driving the blade to rotate, the fan shielding device comprises a fan cover covering the periphery of the blade, a threaded section is arranged on the driving shaft, the fan cover is matched with the threaded section, the fan is closed, and the fan cover cuts off the communication between the evaporator cavity and the air channel; the fan is started, the fan cover moves axially along the driving shaft under the driving of the threaded section to allow the evaporator cavity to be communicated with the air channel through the fan cavity, the driving shaft is arranged at an angle relative to the horizontal position, the fan is closed, and the fan cover can reset along the threaded section under the action of gravity.

2. The fan screen of claim 1 wherein the drive shaft is angled between 20 and 40 degrees from horizontal.

3. The fan screen of claim 2 wherein the drive shaft is angled at 35 degrees relative to horizontal.

4. The fan shelter of claim 1, wherein the target refrigeration compartment is configured as a freezer compartment, the fan shelter being disposed at a rear of the freezer compartment.

5. The fan screen of claim 1 wherein the drive shaft is parallel to a horizontal position, wherein the fan is stopped and then reversed for a predetermined time, and wherein the fan guard is repositionable along the threaded section upon reversal of the fan.

6. The fan shelter of claim 5, wherein the predetermined time is 0.5 seconds to 2 seconds.

7. The fan screen of claim 6, wherein the predetermined time is 1 second.

8. The fan screen of claim 1 wherein the fan cavity is in communication with the air duct and the fan guard is configured to disconnect or allow communication between the fan cavity and the evaporator cavity.

9. A refrigerator characterized in that it comprises a fan shelter according to one of claims 1 to 8.