CN110726275A - Mute air supply device for refrigeration appliance and refrigeration appliance - Google Patents

Abstract

The invention relates to a mute air supply device for a refrigeration appliance and the refrigeration appliance. The silent air supply device comprises an air duct cover plate assembly which is arranged between the evaporator chamber and the storage chamber, the air duct cover plate assembly comprises a rear cover plate facing the evaporator chamber and a front cover plate facing the storage chamber and arranged opposite to the rear cover plate, a cavity is formed between the front cover plate and the rear cover plate, an air inlet used for communicating the cavity with the evaporator chamber is formed in the rear cover plate, and an air outlet used for communicating the cavity with the storage chamber is formed in the front cover plate. The cavity is configured to controllably expand and contract its internal volume to promote airflow within the evaporator chamber through the air inlet to the cavity during expansion of its volume and to promote airflow within the cavity through the air outlet to the storage compartment during contraction of its volume. The invention utilizes the change of the volume of the cavity to generate the air pressure difference between the inside and the outside of the cavity, utilizes the air pressure difference to realize the effective flow of the air flow, does not have turbulence components such as a fan and the like, and has smaller noise.

Description

Mute air supply device for refrigeration appliance and refrigeration appliance

Technical Field

The invention relates to refrigeration equipment, in particular to a mute air supply device for a refrigeration appliance and the refrigeration appliance.

Background

The traditional air-cooled refrigerator mainly utilizes a fan to blow cold air into a storage room of the refrigerator, and hot air in the storage room is replaced to achieve the purpose of reducing the indoor temperature of the storage room. Because the fan is used for driving the air in the refrigerator body to flow, the indoor temperature cooling speed of the storage room of the refrigerator is relatively high, the defrosting can be automatically realized, and the use is very convenient.

However, as the demand for the capacity of the refrigerator increases, the rotational speed and the diameter of the fan need to be increased to meet the demand for freezing, which increases the noise generated during the operation of the refrigerator. Meanwhile, the air volume of the air supply openings on the fan cover plate is different, the air volume of the air supply openings around the fan is large, the air volume of the air supply openings far away from the fan is small, and therefore the temperature of different areas in a storage room is different. Moreover, the fan is usually installed on a fan cover plate above the evaporator, the fan occupies a certain space of the evaporator chamber, further expansion of the size of the evaporator is affected, and the heat exchange amount and the size of the fan need to be comprehensively considered when the evaporator is selected, so that limitation is large. In addition, the structure of the fan cover plate for installing the fan is very complex, and the cost is high.

Disclosure of Invention

It is an object of a first aspect of the present invention to overcome at least one of the disadvantages of the prior art and to provide a quiet air supply arrangement for a refrigeration appliance that is less noisy.

It is a further object of the first aspect of the present invention to simplify the construction of the silent air delivery device.

It is a further object of the first aspect of the present invention to reduce the space occupied by the silent air delivery devices.

The invention aims at providing a refrigeration appliance with the mute air supply device.

According to a first aspect of the invention, the invention provides a silent air supply device for a refrigeration appliance, the refrigeration appliance comprises a box body, a storage compartment and an evaporator chamber are defined in the box body, the evaporator chamber is positioned at the rear side of the storage compartment,

the silent air supply device comprises an air duct cover plate assembly, the air duct cover plate assembly is arranged between the evaporator chamber and the storage chamber and comprises a rear cover plate facing the evaporator chamber and a front cover plate facing the storage chamber and arranged opposite to the rear cover plate, a cavity is formed between the front cover plate and the rear cover plate, an air inlet used for communicating the cavity with the evaporator chamber is formed in the rear cover plate, and an air outlet used for communicating the cavity with the storage chamber is formed in the front cover plate; wherein

The cavity is configured to controllably expand and contract in its internal volume to cause airflow within the evaporator chamber through the air inlet to the cavity during expansion of its volume and to cause airflow within the cavity through the air outlet to the storage compartment during contraction of its volume.

Optionally, an elastic membrane is arranged on the rear cover plate, and a volume-variable region of the cavity is formed between the elastic membrane and the front cover plate; and is

The silent air blowing device further comprises a driving mechanism configured to controllably cause the elastic diaphragm to be reciprocally switched between a relaxed state and a contracted state to

Gradually expanding the volume of the cavity during the process that the elastic membrane is switched from the contraction state to the relaxation state, so that the air flow in the evaporator chamber is promoted to flow to the cavity through the air inlet;

and the volume of the cavity is gradually compressed in the process that the elastic membrane is switched from the relaxation state to the contraction state, so that the air in the cavity is promoted to flow to the storage compartment through the air outlet.

Optionally, the drive mechanism comprises:

the iron core is arranged on the front cover plate and is positioned in the cavity; and

a coil wound on the core and configured to: when the power supply is switched on, a magnetic field is generated to magnetize the iron core, so that the elastic membrane is attracted to be contracted to the contracted state; allowing the elastic diaphragm to return to a relaxed state under its own elastic restoring force when the power supply is disconnected.

Optionally, the number of the air outlets is multiple, and the distribution of the multiple air outlets on the front cover plate is set to make each air outlet have the same air outlet amount in the contraction process of switching the elastic membrane from the diastole state to the contraction state.

Optionally, a first check valve is disposed at the air inlet, and the first check valve is configured to open the air inlet during the volume expansion of the cavity and close the air inlet during the volume reduction of the cavity, so as to only allow the airflow in the evaporator chamber to flow to the cavity and prevent the airflow in the cavity from flowing to the evaporator chamber.

Alternatively,

the air outlet is provided with a second one-way valve, and the second one-way valve is configured to close the air outlet in the process of expanding the volume of the cavity and open the air outlet in the process of reducing the volume of the cavity so as to prevent the airflow in the storage compartment from flowing to the cavity and only allow the airflow in the cavity to flow to the storage compartment.

Optionally, the refrigeration appliance further comprises an evaporator disposed in the evaporator chamber for providing a cooling airflow; and is

The mute air supply device is positioned on the front side of the evaporator.

Optionally, another storage compartment above the storage compartment and an air supply duct behind the other storage compartment are further defined in the box body, and a lower end of the air supply duct is selectively communicated with the cavity through an electrically controlled damper to selectively allow the air flow in the cavity to flow into the air supply duct so as to flow to the other storage compartment.

Optionally, the silent air supply device is arranged at an interval with the bottom wall of the box body below the silent air supply device, so that an air return opening for returning the air flow in the storage compartment to the evaporator chamber is formed between the bottom of the silent air supply device and the bottom wall of the box body.

According to a second aspect of the invention, there is also provided a refrigeration appliance comprising:

the refrigerator comprises a box body, a storage chamber and an evaporator chamber, wherein the storage chamber and the evaporator chamber are defined in the box body;

the evaporator is arranged in the evaporator chamber and is used for providing cooling air flow for the storage compartment; and

the silent air supply device is arranged between the evaporator chamber and the storage chamber and used for promoting the cooling air flow in the evaporator chamber to flow to the storage chamber.

The volume-variable cavity is specially designed in the mute air supply device, the aim of continuously supplying air to the storage chamber is fulfilled by utilizing the process of alternately expanding and reducing the internal volume of the cavity, and the air supply fan in the prior art is replaced, so that the larger noise caused by air disturbance due to the rotation of the fan impeller is avoided.

Furthermore, the invention utilizes the elastic membrane and the front cover plate to form a variable-volume area of the cavity, and the structure is simpler. Furthermore, the elastic diaphragm is driven to expand or contract by the driving mechanism with the iron core and the coil, so that current is only required to be periodically introduced into the coil, the structure is simple, the control is easy, the realization is easy, and the cost is reduced.

Furthermore, the mute air supply device is positioned at the front side of the evaporator of the refrigeration appliance, so that the mute air supply device does not occupy the space above the evaporator like the existing fan, the size of the evaporator is not influenced or limited, and the size of the evaporator can be selected or adjusted according to the actual cooling capacity requirement of the storage chamber.

Furthermore, the mute air supply device comprises a plurality of air outlets, and the distribution of the air outlets on the front cover plate is set to enable each air outlet to have the same air output amount in the contraction process of the elastic membrane. Therefore, the air flow sent into the storage room can be ensured to be more uniform, so that the refrigerating and/or freezing storage effect in the storage room is improved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic block diagram of a refrigeration appliance according to one embodiment of the present invention;

fig. 2 and 3 are schematic structural diagrams of different states of a silent air blowing device for a refrigeration appliance according to an embodiment of the present invention;

FIG. 4 is a schematic view of the direction of airflow within a refrigeration appliance according to one embodiment of the present invention;

fig. 5 is a schematic structural view of a refrigeration appliance according to another embodiment of the present invention.

Detailed Description

The invention firstly provides a mute air supply device for a refrigeration appliance. Fig. 1 is a schematic configuration diagram of a refrigeration appliance according to an embodiment of the present invention. The refrigeration appliance 1 provided by the invention comprises a box body 10, wherein a storage compartment 11 and an evaporator chamber 12 positioned on one side of the storage compartment 11 are defined in the box body 10. The evaporator chamber 12 can be located, for example, on the rear side of the storage compartment 11. The storage compartment 11 has a storage space for storing articles for a user therein, and the evaporator chamber 12 is used for accommodating an evaporator 40, a defrosting heater and the like of the refrigeration appliance 1. The front side of the cabinet 10 may have a forward opening, and the refrigeration appliance 1 may further include a door body 20 for covering the forward opening of the cabinet, the door body 20 being pivotally connected to the cabinet 10.

Fig. 2 and 3 are schematic structural diagrams of different states of a silent air blowing device for a refrigeration appliance according to an embodiment of the present invention, fig. 4 is a schematic diagram of an airflow flowing direction in the refrigeration appliance according to an embodiment of the present invention, and a curved hollow arrow in fig. 4 indicates the airflow flowing direction. Referring to fig. 1 to 4, the silent air blower 30 of the present invention includes a duct cover assembly 31 disposed between the evaporator compartment 12 and the storage compartment 11 for separating the evaporator compartment 12 and the storage compartment 11. The air duct cover assembly 31 includes a rear cover 311 facing the evaporator chamber 12 and a front cover 312 facing the storage compartment 11 and disposed opposite the rear cover 311. The front cover plate 312 may be spaced apart from the rear cover plate 311. A cavity 32 is formed between the front cover plate 312 and the rear cover plate 311, an air inlet 313 for communicating the cavity 32 with the evaporator chamber 12 is formed on the rear cover plate 311, and an air outlet 314 for communicating the cavity 32 with the storage compartment 11 is formed on the front cover plate 312.

In particular, the cavity 32 is configured to controllably expand and contract its internal volume to promote airflow within the evaporator chamber 12 through the intake opening 313 to the cavity 32 during expansion of its volume (see fig. 2) and to promote airflow within the cavity 32 through the outlet opening 314 to the storage compartment 11 during contraction of its volume (see fig. 3). Specifically, during the expansion of the volume of the cavity 32, the air pressure inside the cavity is reduced, and the external air flow can flow into the cavity 32 through the air inlet 313. In the process of reducing the volume of the cavity 32, the air inside the cavity is compressed, the air pressure is increased, and the air flow inside the cavity is promoted to flow to the storage compartment 11 through the air outlet 314, so that the primary air supply process is completed. That is, the silent air blower 30 of the present invention utilizes the volume change of the cavity 32 to generate an air pressure difference between the inside and the outside of the cavity 32, and utilizes the air pressure difference to realize effective flow of air flow without any turbulence components such as a fan.

The volume-variable cavity 32 is specially designed in the mute air supply device 30, the purpose of continuously supplying air to the storage chamber 11 is realized by utilizing the process of alternately expanding and reducing the internal volume of the cavity 32, and the mute air supply device replaces an air supply fan in the prior art, so that the larger noise caused by air disturbance caused by the rotation of a fan impeller is avoided, and in the mute air supply device 30, the disturbance of the air in the process of expanding and reducing the internal volume of the cavity 32 is smaller, so that the noise is smaller.

In some embodiments of the present invention, an elastic membrane 315 is disposed on the back cover 311, and the volume-variable region of the cavity 32 is formed between the elastic membrane 315 and the front cover 312. The present invention utilizes the elastic membrane 315 and the front cover plate 312 to form the volume-variable region of the cavity 32, and the structure is simple. Specifically, the cavity 32 may have a variable volume region and a non-variable volume region. The rear cover plate 311 may have a notch with a large area, and the elastic membrane 315 covers the notch and is hermetically connected to the edge of the notch by gluing, welding, or the like, so as to prevent the air leakage at the interface between the elastic membrane 315 and the edge of the notch from affecting the air inlet and outlet. The volume-variable region of the cavity 32 is formed between the elastic membrane 315 and the front cover 312, and the volume-invariable region of the cavity 32 is formed between the plate body of the rear cover 311 other than the above-mentioned notch and the front cover 312. The air inlet 313 may be disposed in an area of the plate body of the rear cover 311 above the elastic membrane 315, so that the air flow entering the cavity 32 through the air inlet 313 is a cooling air flow flowing from bottom to top through the evaporator 40 and exchanging heat with the evaporator 40.

Further, the silent air blower 30 further comprises a driving mechanism 33, wherein the driving mechanism 33 is configured to controllably cause the elastic membrane 315 to be reciprocally switched between the relaxed state and the contracted state so as to gradually enlarge the volume of the cavity 32 during the switching of the elastic membrane 315 from the contracted state to the relaxed state thereof, thereby causing the air flow in the evaporator chamber 12 to flow to the cavity 32 through the air inlet 313; and gradually compresses the volume of the cavity 32 in the process that the elastic membrane 315 is switched from the relaxed state to the contracted state, so as to promote the airflow in the cavity 32 to flow to the storage compartment 11 through the air outlet 314. That is, the volume of the cavity 32 is maximized when the elastic membrane 315 is in the relaxed state; the volume of the cavity 32 is minimized when the elastomeric membrane 315 is in a contracted state. Referring to fig. 2 and 3, in the state shown in fig. 2, the driving mechanism 33 drives the elastic membrane 315 to deform along arrow Q in fig. 2, at which time the elastic membrane 315 is in the process of switching from its contracted state to its relaxed state, and the curved hollow arrow in fig. 2 shows the flow direction of the air flow. In the state shown in fig. 3, the driving mechanism 33 drives the elastic membrane 315 to deform along arrow P in fig. 3, at which time the elastic membrane 315 is in the process of switching from its relaxed state to its contracted state, and the curved hollow arrows in fig. 3 show the flow direction of the air flow.

Specifically, when the elastic membrane 315 is in the relaxed state, the elastic membrane 315 may be convexly curved backward to the maximum extent; when the elastic membrane 315 is in the contracted state, the elastic membrane 315 may be located at a position flush with the plate body of the rear cover 311, may be located at a position slightly protruding rearward with respect to the plate body of the rear cover 311, or may be located at a position slightly protruding forward with respect to the plate body of the rear cover 311.

In alternative embodiments of the invention, the variable volume cavity 32 may also be formed by other components besides the elastomeric membrane 315.

In some embodiments of the present invention, the drive mechanism 33 may include a plunger 331 and a coil 332. The iron core 331 is disposed on the front cover plate 312 and is in the cavity 32. The coil 332 is wound on the iron core 331, and is configured to: generating a magnetic field to magnetize the iron core 331 when the power is turned on, thereby attracting the elastic diaphragm 315 and causing the elastic diaphragm 315 to contract to its contracted state; when the power is turned off, the elastic diaphragm 315 is allowed to return to the relaxed state under its own elastic restoring force. The driving mechanism 33 with the iron core 331 and the coil 332 is used for driving the elastic membrane 315 to expand or contract, so that only current needs to be periodically introduced into the coil 332, the structure is simple, the control is easy, the implementation is easy, and the cost is reduced.

Specifically, one end of the iron core 331 is fixed to the front cover 312, and the other end thereof is extended to protrude rearward. When the coil 332 is energized, a magnetic field is generated to magnetize the iron core 331, and the other end of the iron core 331 forms a magnetic pole, so that a large forward attraction force is generated on the elastic diaphragm 315, the attraction force causes the elastic diaphragm 315 to contract forward, air in the cavity 32 is compressed, and the air is discharged from the air outlet 314 to the storage compartment 11. When the coil 332 is de-energized, the magnetic field disappears, the magnetic property of the iron core 331 disappears, and the attraction force to the elastic diaphragm 315 also disappears. The elastic membrane 315 now expands back under its own elastic restoring force until it returns to its relaxed state, during which the air pressure in the cavity 32 decreases and the air flow in the evaporator chamber 12 is drawn into the cavity 32 through the intake opening 313. Through the continuous power-on and power-off processes of the coil 332, the airflow is continuously compressed, discharged and sucked, so that the process of continuously supplying cooling airflow into the storage compartment 11 is realized.

In some alternative embodiments of the present invention, the driving means 30 for driving the elastic membrane 315 to switch back and forth between its relaxed state and its contracted state may also be a mechanical type structure, an electrical type structure or other magnetic mechanism capable of causing the elastic membrane 315 to deform.

In some embodiments of the present invention, the silent air blower 30 is spaced from the bottom wall 14 of the cabinet 10 below it to form an air return opening 15 between the bottom of the silent air blower 30 and the bottom wall 14 of the cabinet 10 for returning the air flow in the storage compartment 11 to the evaporator compartment 12. As the silent air blower 30 continuously provides cooling air to the storage compartment 11, the air pressure in the storage compartment 11 increases, and the original air in the storage compartment 11 returns to the evaporator chamber 12 through the air return opening 15, thereby achieving air circulation in the refrigeration device 10.

In some embodiments of the present invention, the number of the air outlets 314 is multiple, and the distribution of the multiple air outlets 314 on the front cover plate 312 is configured to make each air outlet 314 have the same air volume during the contraction process of the elastic membrane 315 switching from its relaxed state to its contracted state. Thereby, a more uniform air flow into the storage compartment 11 can be ensured to improve the cold and/or frozen storage effect in the storage compartment 11.

Specifically, the air outlets 314 may be sequentially distributed on the front cover plate 312 along the vertical direction.

In some alternative embodiments, the distribution of the plurality of air outlets 314 on the front cover plate 312 may also be configured such that each air outlet 314 has a different air volume during the contraction process of the elastic membrane 315 switching from its relaxed state to its contracted state.

In some embodiments of the present invention, a first one-way valve 316 is provided at the air inlet opening 313, the first one-way valve 316 being configured to open the air inlet opening 313 during expansion of the volume of the cavity 32 and close the air inlet opening 313 during reduction of the volume of the cavity 32 to allow only airflow in the evaporator chamber 12 to flow to the cavity 32 and to prevent airflow in the cavity 32 to the evaporator chamber 12. Further, a second one-way valve 317 is disposed at the air outlet 314, and the second one-way valve 317 is configured to close the air outlet 314 during the volume expansion of the cavity 32 and open the air outlet 314 during the volume reduction of the cavity 32, so as to prevent the airflow in the storage compartment 11 from flowing to the cavity 32 and only allow the airflow in the cavity 32 to flow to the storage compartment 11.

That is, the present invention can only allow the airflow in the evaporator chamber 12 to enter the cavity 32 through the air inlet 313 and prevent the airflow in the storage compartment 11 from flowing back to the cavity 32 through the air outlet 314 by providing the first check valve 316 and the second check valve 317 at the air inlet 313 and the air outlet 314, respectively, so that the air inlet 313 is opened and the air outlet 314 is closed during the volume expansion of the cavity 32 (for example, during the elastic membrane 315 is switched from its contracted state to its expanded state). At the same time, during the reduction of the volume of the cavity 32 (which may be, for example, during the switching of the elastic membrane 315 from its relaxed state to its contracted state), the air inlet 313 is closed and the air outlet 314 is open, thereby allowing only the air flow in the cavity 32 to flow into the storage compartment 11 and preventing the air flow in the cavity 32 from flowing back into the evaporator compartment 12. In this way, a simple construction ensures a normal flow direction of the air flow between the evaporator chamber 12, the cavity 32 and the storage compartment 11, avoiding an inefficient air flow.

Specifically, the first check valve 316 may be a valve sheet that covers the intake vent 313 in a manner that the valve sheet can be lifted from the front side of the intake vent 313, that is, the first check valve 316 may be located on a side of the intake vent 313 in the cavity 32. The second one-way valve 317 may be a valve sheet that covers the air outlet 314 in a manner that the second one-way valve 316 can be lifted from the front side of the air outlet 314, that is, the second one-way valve 316 may be located on a side of the air outlet 314 that is located in the storage compartment 11. Therefore, when the elastic membrane 315 is switched from its relaxed state to its contracted state, the volume in the cavity 32 decreases, and the air pressure increases, so as to urge the first check valve 316 to abut against the air inlet 313 and open the second check valve 317, thereby closing the air inlet 313 and opening the air outlet 314. When the elastic membrane 315 is switched from its contracted state to its relaxed state, the volume in the cavity 32 is expanded, and the air pressure is reduced, so as to open the first one-way valve 316 and to close the air outlet 314 by the second one-way valve 317, thereby opening the air inlet 313 and closing the air outlet 314.

In some embodiments of the invention, the refrigeration appliance 1 further comprises an evaporator 40 disposed within the evaporator chamber 12 for providing a cooling airflow. The silent air supply device 30 is located at the front side of the evaporator 40, so that the silent air supply device does not occupy the space above the evaporator 40 like the existing fan, and does not influence or limit the size of the evaporator 40, and the size of the evaporator 40 can be selected or adjusted according to the actual cooling capacity requirement of the storage compartment 11.

Further, the entire silent air supply device is substantially in the shape of a strip or a plate, so that the silent air supply device occupies a very small space in the storage compartment 11.

Fig. 5 is a schematic structural view of a refrigeration appliance according to another embodiment of the present invention. In some embodiments of the present invention, another storage compartment 13 located above the storage compartment 11 and an air supply duct 19 located at the rear side of the other storage compartment 13 are further defined in the box body 10, and the lower end of the air supply duct 19 is selectively communicated with the cavity 32 through the electrically controlled damper 16 to selectively allow the air flow in the cavity 32 to flow into the air supply duct 19 and thus to the other storage compartment 13.

Specifically, the top of the cavity 32 is connected to the lower end of the air supply duct 19, the top of the cavity 32 may be provided with an opening, and the electrically controlled damper 16 may be disposed near the opening to controllably communicate the cavity 32 with the air supply duct 19 or block communication between the cavity 32 and the air supply duct 19, thereby selectively providing cooling air flow to the other storage compartment 13.

Further, the storage compartment 11 may be a freezing compartment for freezing food, and the other storage compartment 13 may be a refrigerating compartment for refrigerating food.

The invention also provides a refrigeration appliance, and the refrigeration appliance 1 comprises a box body 10 and an evaporator 40. The cabinet 10 defines a storage compartment 11 and an evaporator compartment 12 located at one side of the storage compartment 11. An evaporator 40 is disposed in the evaporator chamber 12 for providing a cooling airflow to the storage compartment 11. Further, the refrigeration device 1 further includes a compressor 50, a condenser 60, and a throttling device 70 connected by refrigerant pipes, and the compressor 50, the condenser 60, the throttling device 70, and the evaporator 40 constitute main components of a refrigeration cycle of the refrigeration device 1.

In particular, the refrigeration appliance 1 further comprises a silent air blower 30 as described in any of the above embodiments, which is disposed between the evaporator compartment 12 and the storage compartment 11 for promoting the cooling air flow in the evaporator compartment 12 to the storage compartment 11.

As described above, the silent air blower 30 uses the change in the volume of the cavity 32 to generate an air pressure difference between the inside and the outside of the cavity 32, and uses the air pressure difference to realize effective flow of air flow without any turbulence member such as a fan. That is, in the refrigeration appliance 1 of the present invention, the silent air blowing device 30 is used to replace a conventional driving component such as a fan to blow air into the storage compartment 11, and thus, the air flow disturbance is small and the noise is small. In addition, the refrigeration appliance 1 of the invention cancels a fan supporting cover plate with a complex structure, simplifies the structure and reduces the cost.

It will be appreciated by those skilled in the art that the refrigeration appliance 1 of the present invention may be a refrigerator, freezer or other device having a refrigeration function.

It should be understood by those skilled in the art that terms such as "upper", "lower", "inner", "outer", "top", "bottom", "front", "rear", etc. used in the embodiments of the present invention to indicate orientation or positional relationship are based on the actual usage state of the silent air blower 30 installed in the refrigeration appliance 1, and these terms are only used for convenience of describing and understanding the technical solution of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore, should not be construed as limiting the present invention.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A silent air supply device for a refrigeration appliance, the refrigeration appliance comprises a box body, a storage chamber and an evaporator chamber positioned at one side of the storage chamber are limited in the box body, the silent air supply device is characterized in that,

the silent air supply device comprises an air duct cover plate assembly, the air duct cover plate assembly is arranged between the evaporator chamber and the storage chamber and comprises a rear cover plate facing the evaporator chamber and a front cover plate facing the storage chamber and arranged opposite to the rear cover plate, a cavity is formed between the front cover plate and the rear cover plate, an air inlet used for communicating the cavity with the evaporator chamber is formed in the rear cover plate, and an air outlet used for communicating the cavity with the storage chamber is formed in the front cover plate; wherein

The cavity is configured to controllably expand and contract in its internal volume to cause airflow within the evaporator chamber through the air inlet to the cavity during expansion of its volume and to cause airflow within the cavity through the air outlet to the storage compartment during contraction of its volume.

2. A silent air blowing device as claimed in claim 1,

an elastic diaphragm is arranged on the rear cover plate, and a volume variable region of the cavity is formed between the elastic diaphragm and the front cover plate; and is

The silent air blowing device further comprises a driving mechanism configured to controllably cause the elastic diaphragm to be reciprocally switched between a relaxed state and a contracted state to

Gradually expanding the volume of the cavity during the process that the elastic membrane is switched from the contraction state to the relaxation state, so that the air flow in the evaporator chamber is promoted to flow to the cavity through the air inlet;

and the volume of the cavity is gradually compressed in the process that the elastic membrane is switched from the relaxation state to the contraction state, so that the air in the cavity is promoted to flow to the storage compartment through the air outlet.

3. The silent air blower according to claim 2, wherein the drive mechanism comprises:

the iron core is arranged on the front cover plate and is positioned in the cavity; and

a coil wound on the core and configured to: when the power supply is switched on, a magnetic field is generated to magnetize the iron core, so that the elastic membrane is attracted to be contracted to the contracted state; allowing the elastic diaphragm to return to a relaxed state under its own elastic restoring force when the power supply is disconnected.

4. A silent air blowing device as claimed in claim 2,

the number of the air outlets is multiple, and the air outlets are distributed on the front cover plate and are set to enable each air outlet to have the same air outlet amount in the contraction process of switching the elastic membrane from the diastole state to the contraction state.

5. A silent air blowing device as claimed in claim 1,

the air inlet is provided with a first one-way valve, and the first one-way valve is configured to be opened in the process of expanding the volume of the cavity and be closed in the process of reducing the volume of the cavity so as to only allow the airflow in the evaporator chamber to flow to the cavity and prevent the airflow in the cavity from flowing to the evaporator chamber.

6. A silent air blowing device as claimed in claim 1,

the air outlet is provided with a second one-way valve, and the second one-way valve is configured to close the air outlet in the process of expanding the volume of the cavity and open the air outlet in the process of reducing the volume of the cavity so as to prevent the airflow in the storage compartment from flowing to the cavity and only allow the airflow in the cavity to flow to the storage compartment.

7. A silent air blowing device as claimed in claim 1,

the refrigeration appliance also comprises an evaporator arranged in the evaporator chamber and used for providing cooling airflow; and is

The mute air supply device is positioned on the front side of the evaporator.

8. A silent air blowing device as claimed in claim 1,

the box body is internally provided with another storage chamber positioned above the storage chamber and an air supply duct positioned on one side of the other storage chamber, and the lower end of the air supply duct is selectively communicated with the cavity through an electric control air door so as to selectively allow the air flow in the cavity to flow into the air supply duct and then flow to the other storage chamber.

9. A silent air blowing device as claimed in claim 1,

the silent air supply device and the bottom wall of the box body below the silent air supply device are arranged at intervals, so that an air return opening for returning air flow in the storage compartment to the evaporator chamber is formed between the bottom of the silent air supply device and the bottom wall of the box body.

10. A refrigeration appliance, comprising:

the refrigerator comprises a box body, a storage chamber and an evaporator chamber, wherein the storage chamber and the evaporator chamber are defined in the box body;

the evaporator is arranged in the evaporator chamber and is used for providing cooling air flow for the storage compartment; and

the silent air blower as claimed in any one of claims 1 to 9, disposed between the evaporator chamber and the storage compartment for promoting the cooling air flow in the evaporator chamber to the storage compartment.

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