Patent Description:
In general, a refrigerator is such a device to which a general refrigerating cycle of a circulating refrigerant is applied, so as to supply cold air generated when the liquid refrigerant is evaporated to a storage compartment, such as a freezing compartment and a refrigerating compartment, thereby preserving foods fresh for a long time.

The refrigerator in a prior art includes a compressor, a condenser, a capillary tube and an evaporator which are connected successively to form a loop. A refrigerating capacity, i.e., an amount of refrigerant, in a cooling system is matched mainly in a design stage, and the amount of refrigerant in the cooling system is constant when the refrigerator is in use. However, in actual use, the operation condition of the refrigerator always changes due to a change in an environment temperature, articles loaded in the refrigerator, or the like. At this point, the constant amount of refrigerant in the cooling system may cause a low operating efficiency of the refrigerator. For example, when the environment temperature is relatively high, a large number of articles are placed at a time or the refrigerator is started up, a refrigerating demand is great, and the amount of refrigerant in the system is less than the required amount of refrigerant; when the environment temperature is relatively low or a small number of articles exist in the refrigerator, the refrigerating demand is small, and the amount of refrigerant in the system is greater than the required amount of refrigerant.

For the cooling system, the amount of refrigerant therein affects a refrigerating effect of the system greatly, and either the large or small amount of refrigerant may increase a workload of the compressor, thereby influencing the service life of the compressor, and then causing great power consumption and a poor refrigerating effect of the refrigerator.

<CIT> discloses an air conditioner with a function of automatically adjusting the quantity of refrigerants of a system, comprising a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger and an auxiliary refrigerant tank. The compressor, the four-way valve, the outdoor heat exchanger, the throttling device and the indoor heat exchanger are sequentially serially connected with one another to form a loop, and the auxiliary refrigerant tank is serially connected into the loop and is used for adjusting the quantity of the refrigerants of the system.

<CIT> discloses a pressure regulating device for container, van and cooling machine, comprising a pressure regulator and pressure measurement control device, where the pressure regulator comprises front cover with through hole and rear cover, an air pressure plate, an air pressure plate guider, a seal ring, an elastic component, an elastic component guider and an electromagnetic device. The seal ring is inside the front cover and encircles the through hole of the front cover, the air pressure plate is in the front cover and includes a through hole in the projection region of a sealing side of the seal ring, the elastic component drives the air pressure plate through the elastic component guider to press the air pressure plate closely on the seal ring. The electromagnetic device is fixed with the air pressure plate or the rear cover, the pressure measurement control device is connected in series with power supply and the electromagnetic device and installed inside the boxes of the container, van and cooling machine, and it implements automatically regulating inner and outer pressures of a sealed box body to prevent the box body structure from being destroyed by pressure difference between inside and outside.

In order to solve the above-mentioned technical problems, the present invention proposes a refrigerator cooling system.

To achieve the above-mentioned objects, the present invention provides the technical solution as follows. A refrigerator cooling system, capable of regulating an amount of refrigerant automatically, according to claim <NUM>.

As a further improvement of the present invention, wherein the set period of time ranges from <NUM> to <NUM> seconds.

As a further improvement of the present invention, wherein the regulating mechanism further comprises an electromagnet and a magnetic piece connected with the seal part fixedly, wherein the electromagnet is fixed at a side apart from the opening; when the electromagnet is powered on, the magnetic piece moves towards the electromagnet, the seal part is separated from the opening, and when the electromagnet is powered off, the magnetic piece moves apart from the electromagnet, and the seal part is attached to the opening.

As a further improvement of the present invention, wherein the refrigerant amount regulating device further comprises a controller connected with the electromagnet, for obtaining operation information of the refrigerator to control the electromagnet to be powered on or off.

As a further improvement of the present invention, wherein the regulating mechanism further comprises a spring, both ends of which are connected with the electromagnet and the magnetic piece respectively; when the electromagnet is powered off, no external force acts on the spring, and the spring enables the seal part to be attached to the opening, and when the electromagnet is powered on, the magnetic piece is attracted to the electromagnet to separate the seal part from the opening.

As a further improvement of the present invention, wherein the regulating mechanism further comprises a connecting rod for connecting the seal part with the magnetic piece.

As a further improvement of the present invention, wherein the refrigerant amount regulating device further comprises a communicating pipe connected with the opening to communicate the storage cavity with the pipe.

As a further improvement of the present invention, wherein a side of the seal part close to the opening is made of an elastic material to seal the opening through deformation.

The present invention has the beneficial effects as follows. The refrigerator cooling system according to the present invention includes the pipe which forms the loop and the compressor, the condenser, the refrigerant amount regulating device, the capillary tube and the evaporator which are provided on the pipe successively. When the refrigerant of the cooling system is required to be increased or reduced, the seal part is separated from the opening to open the opening, the refrigerant in the storage cavity flows into the cooling system or the refrigerant in the cooling system flows into the storage cavity, and after the set period of time, the seal part is attached to the opening to close the opening. An electromagnet is controlled to be powered on or off by a controller which is with a simple structure and convenient control, so as to open or close the refrigerant amount regulating device, such that under different external conditions, a load of the compressor may be regulated in time, the service life thereof is longer, and energy consumption of the refrigerator is optimized, thereby saving more energy and achieving a better refrigerating effect.

In the drawings, <NUM>-cooling system; <NUM>-compressor; <NUM>-condenser; <NUM>-refrigerant amount regulating device; <NUM>-capillary tube; <NUM>-evaporator; <NUM>-pipe; <NUM>-storage device; <NUM>-regulating mechanism; <NUM>-storage cavity; <NUM>-opening; <NUM>-seal; <NUM>-magnetic piece; <NUM>-electromagnet; <NUM>-spring; <NUM>-connecting rod; <NUM>-controller; <NUM>-communicating tube.

In order to make the objects, the technical solutions and the advantages of the present application more clear, the technical solutions of the present application will be described hereinafter in a clear and complete manner in conjunction with the embodiments of the present application and corresponding drawings. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without any creative effort shall fall within the protection scope of the present application as defined by the appended claims.

Reference will be made in detail to embodiments of the present application, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions. The embodiments described herein with reference to drawings are illustrative, and merely used to explain the present application. The embodiments shall not be construed to limit the present application.

In the description of the present invention, it should be noted that unless specified or limited otherwise, the terms "mounted", "connected", and "coupled" and the like are used broadly, and may be, for example, mechanical or electrical connections; may also be inner communications of two elements, direct connections or indirect connections via intervening structures. The above terms can be understood by those skilled in the art according to specific situations.

As shown in <FIG>, the present invention provides a cooling system <NUM> for a refrigerator capable of regulating an amount of refrigerant automatically, the cooling system <NUM> including a pipe <NUM> which forms a loop, and a compressor <NUM>, a condenser <NUM>, a refrigerant amount regulating device <NUM>, a capillary tube <NUM> and an evaporator <NUM> which are provided on the pipe <NUM> successively.

In the present invention, as shown in <FIG>, the refrigerant amount regulating device <NUM> includes a storage device <NUM> and a regulating mechanism <NUM> provided within the storage device, wherein a storage cavity <NUM> is formed inside the storage device <NUM> to accommodate a refrigerant, an opening <NUM> is formed in the storage device <NUM> to communicate the storage cavity <NUM> with the pipe <NUM>, and the regulating mechanism <NUM> includes a seal part <NUM> configured for opening or closing the opening <NUM>.

Generally, in the cases where an environment temperature is relatively low or a small number of articles is stored in the refrigerator actually, or the like, the operating refrigerator has a small refrigerating demand; specifically, in the present embodiment, the relatively low environment temperature refers to a temperature lower than <NUM> Celsius degrees, and the case where a small number of articles is stored in the refrigerator actually refers to the case where a storage volume of the refrigerator for the articles is less than one tenth of an actual volume of the refrigerator.

In general, in the cases of the relatively high environment temperature, startup of the refrigerator or a large number of articles loaded at a time, or the like, the operating refrigerator has a great refrigerating demand; specifically, in the present embodiment, the relatively high environment temperature refers to a temperature higher than <NUM> Celsius degrees.

Thus, when the refrigerator has the small refrigerating demand, the amount of refrigerant of the cooling system <NUM> is required to be reduced; when the compressor <NUM> is operating, the pipe <NUM> is in a high pressure state, and the seal part <NUM> is separated from the opening <NUM> to open the opening; since an intensity of pressure in the pipe <NUM> is greater than an intensity of pressure in the storage cavity <NUM>, the refrigerant in the cooling system <NUM> flows into the storage cavity <NUM>, and the refrigerant in the storage cavity <NUM> becomes a high pressure liquid refrigerant. After a set period of time, the seal part <NUM> is attached to the opening <NUM>, and the refrigerant amount regulating device <NUM> is closed.

When the refrigerator has the large refrigerating demand, the amount of refrigerant of the cooling system <NUM> is required to be increased; when the compressor <NUM> is stopped, the pipe <NUM> is in a low pressure state, and the seal part <NUM> is separated from the opening <NUM> to open the opening; since the intensity of pressure of the storage cavity <NUM> is greater than the intensity of pressure in the pipe <NUM>, the refrigerant in the storage cavity <NUM> flows into the cooling system <NUM>, and the refrigerant in the storage cavity <NUM> becomes a low pressure gas refrigerant. After a set period of time, the seal part <NUM> is attached to the opening <NUM>, and the refrigerant amount regulating device <NUM> is closed.

In addition, when the refrigerator has the great or small refrigerating demand, once the pressure of the storage cavity <NUM> is consistent with the pressure in the pipe <NUM>, the refrigerant does not move after the opening <NUM> is opened.

The amount of refrigerant of the cooling system <NUM> is regulated by opening and closing the refrigerant amount regulating device <NUM>, such that under different external conditions, the load of the compressor <NUM> may be regulated in time, the service life thereof is longer, and the energy consumption of the refrigerator is optimized, thereby saving more energy and achieving better refrigerating effects.

Preferably, the set period of time ranges from <NUM> to <NUM> seconds.

In the present embodiment, the regulating mechanism <NUM> further includes an electromagnet <NUM> and a magnetic piece <NUM> connected with the seal part <NUM> fixedly. The electromagnet <NUM> is fixed at a side apart from the opening to generate an acting force with the magnetic piece <NUM>, thereby driving the seal part <NUM> to be separated from or attached to the opening <NUM>.

In the present embodiment, the magnetic piece <NUM> is configured as a magnetic substance, such as a magnet, iron, cobalt, nickel, or the like.

Further, the refrigerant amount regulating device <NUM> further includes a controller <NUM> connected with the magnet <NUM>, for obtaining operation information of the refrigerator and judging whether there is a great or small amount of refrigerant in the cooling system <NUM>, thereby controlling the electromagnet <NUM> to be powered on or off. The operation information of the refrigerator includes the above-mentioned environment temperature information, the information on the number of articles actually stored in the refrigerator, or the like. Certainly, the objects of the present invention may be realized with other control structures, such as a solenoid valve, or the like, as long as the opening <NUM> may be opened and closed.

When the amount of refrigerant of the cooling system <NUM> is required to be reduced or increased, the electromagnet <NUM> is powered on, then becomes magnetic and is attracted to the magnetic piece <NUM>, and the magnetic piece <NUM> moves towards the electromagnet <NUM>, such that the seal part <NUM> is driven to be separated from the opening <NUM>, the refrigerant amount regulating device <NUM> is opened, and the refrigerant in the storage cavity <NUM> flows into the cooling system <NUM> or the refrigerant in the cooling system <NUM> flows into the storage cavity <NUM>. After a set period of time, the electromagnet <NUM> is powered off, then loses the magnetism and is disconnected with the magnetic piece <NUM> without an acting force, and the magnetic piece <NUM> moves apart from the electromagnet <NUM>, thereby driving the seal part <NUM> to attach to the opening <NUM>, and closing the refrigerant amount regulating device <NUM>.

Further, the regulating mechanism <NUM> further includes a spring <NUM>, both ends of which are connected with the electromagnet <NUM> and the magnetic piece <NUM> respectively. When the electromagnet <NUM> is powered on, the magnetic piece <NUM> is attracted to the electromagnet <NUM>, and the spring is compressed by a deformation force, thereby separating the seal part <NUM> from the opening <NUM>.

When the electromagnet <NUM> is powered off, the electromagnet <NUM> loses the magnetism, and the spring <NUM> is not subjected to the deformation force and returns to an original state, thereby attaching the seal part <NUM> to the opening <NUM>. By the control <NUM> controlling the electromagnet <NUM> to be powered on or off, the refrigerant amount regulating device <NUM> is opened and closed, with a simple structure and convenient control.

Specifically, the regulating mechanism <NUM> further includes a connecting rod <NUM> for connecting the seal part <NUM> with the magnetic piece <NUM>.

In the present embodiment, the refrigerant amount regulating device <NUM> further includes a communicating pipe <NUM> connected with the opening <NUM> to communicate the storage cavity <NUM> with the pipe <NUM>.

Specifically, a side of the seal part <NUM> close to the opening <NUM> is made of an elastic material, so as to be deformed to seal the opening when the seal part <NUM> is driven to be attached to the opening <NUM>.

Thus, in conclusion, for the cooling system <NUM> for a refrigerator according to the present invention, the amount of refrigerant in the cooling system <NUM> is regulated by opening and closing the refrigerant amount regulating device <NUM>, with the simple structure and convenient control, such that under different external conditions, the load of the compressor <NUM> may be regulated in time, the service life is longer, and the energy consumption of the refrigerator is optimized, thereby saving more energy and achieving better refrigerating effects.

Claim 1:
A refrigerator cooling system (<NUM>), capable of regulating an amount of refrigerant automatically, comprising a pipe (<NUM>) which forms a loop, and a compressor (<NUM>), a condenser (<NUM>), a refrigerant amount regulating device (<NUM>), a capillary tube (<NUM>) and an evaporator (<NUM>) which are provided on the pipe (<NUM>) successively;
the refrigerant amount regulating device (<NUM>) comprises a storage device (<NUM>) and a regulating mechanism (<NUM>) provided within the storage device (<NUM>), wherein a storage cavity (<NUM>) is formed inside the storage device (<NUM>) to accommodate a refrigerant, an opening (<NUM>) is formed in the storage device (<NUM>) to communicate the storage cavity (<NUM>) with the pipe (<NUM>), and the regulating mechanism (<NUM>) comprises a seal part (<NUM>) configured for opening or closing the opening (<NUM>); characterized in that the refrigerator cooling system is configured such that
when the refrigerant of the cooling system (<NUM>) is required to be increased, when the compressor (<NUM>) is stopped, the seal part (<NUM>) is separated from the opening (<NUM>) to open the opening (<NUM>), the refrigerant in the storage cavity (<NUM>) flows into the cooling system (<NUM>), and after a set period of time, the seal part (<NUM>) is attached to the opening (<NUM>) to close the opening (<NUM>);
when the refrigerant of the cooling system (<NUM>) is required to be reduced, when the compressor (<NUM>) is operating, the seal part (<NUM>) is separated from the opening (<NUM>) to open the opening (<NUM>), the refrigerant in the cooling system (<NUM>) flows into the storage cavity (<NUM>), and after a set period of time, the seal part (<NUM>) is attached to the opening (<NUM>) to close the opening (<NUM>).