CN217303265U - Refrigerator refrigerating system and refrigerator - Google Patents

Abstract

The utility model discloses a refrigerator refrigerating system and have this refrigerator refrigerating system's refrigerator, wherein, refrigerator refrigerating system includes circulation circuit, first change valve and vortex tube, let in the refrigerant in the circulation circuit, the circulation circuit includes compressor, condenser, first throttling arrangement, the first evaporimeter that communicate in proper order; an inlet of the first switching valve is connected with an outlet of the compressor, the first switching valve is provided with a first outlet and a second outlet, and the first outlet is connected with the condenser; the inlet of the vortex tube is connected with the second outlet, the vortex tube is provided with a hot end and a cold end, the outlet of the hot end is connected with the inlet of the first evaporator, and the outlet of the cold end is connected with the inlet of the compressor. The utility model discloses technical scheme compares electric heater and changes the frost efficiency higher through add the vortex tube in refrigerator refrigerating system, effectively reduces energy loss.

Description

Refrigerator refrigerating system and refrigerator

Technical Field

The utility model relates to a domestic appliance field, in particular to refrigerator refrigerating system and refrigerator.

Background

In the conventional refrigeration system of a refrigerator, a refrigerant applies work through a compressor to generate high-temperature and high-pressure gas, the high-temperature and high-pressure gas is condensed and released heat through a condenser and then liquefied into saturated medium-temperature liquid, the saturated medium-temperature and medium-temperature liquid is throttled and reduced in pressure through a capillary tube to form low-temperature and low-pressure liquid, the low-temperature and low-pressure liquid enters a refrigeration evaporator to absorb heat after absorbing heat through a refrigeration evaporator connected in parallel, and the refrigerant is evaporated into a low-temperature gas state and then returns to the inlet of the compressor to complete refrigerant circulation.

Because the evaporator runs for a period of time, the air or the vapor in the food entering the refrigerator after the door is opened can be frosted on the surface of the evaporator, the heat exchange efficiency can be greatly reduced after the surface of the evaporator is frosted, and the negative influence of the frosting is difficult to eliminate by a passive means, generally, a high-power (100 plus 200W) electric heater is arranged at the lower end of the evaporator, the electric heater is turned on when the refrigerator refrigeration system is required to be defrosted, the electric heater is used for defrosting, and the heater is turned off and continues to refrigerate after the defrosting is finished. However, the defrosting heater mainly performs defrosting by heat radiation, and the amount of heat actually used for defrosting is only about 30%, and the heat utilization is limited. The electric heater is added as an additional component, and the electric heater has larger energy loss during operation and causes additional heat load to the refrigerator.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a refrigerator refrigerating system and refrigerator aims at improving the refrigerator defrosting efficiency, reduces energy loss.

In order to achieve the above object, the utility model provides a refrigerator refrigerating system, this refrigerator refrigerating system includes:

the refrigerant is introduced into the circulation loop, and the circulation loop comprises a compressor, a condenser, a first throttling device and a first evaporator which are sequentially communicated;

a first switching valve having an inlet connected to an outlet of the compressor, the first switching valve having a first outlet and a second outlet, the first outlet connected to the condenser;

and the inlet of the vortex tube is connected with the second outlet, the vortex tube is provided with a hot end and a cold end, the outlet of the hot end is connected with the inlet of the first evaporator, and the outlet of the cold end is connected with the inlet of the compressor.

In one embodiment, the circulation loop further comprises a second switching valve, a second evaporator and a second throttling device, wherein an inlet of the second switching valve is connected with an outlet of the condenser;

the second switching valve is provided with a third outlet and a fourth outlet, the third outlet is connected with the inlet of the first throttling device, the fourth outlet is connected with the inlet of the second throttling device, the outlet of the second throttling device is connected with the inlet of the second evaporator, and the outlet of the second evaporator is connected with the inlet of the first evaporator.

In one embodiment, a check valve is disposed between the inlet of the first evaporator and the outlet of the second evaporator, and a communication direction of the check valve is from the second evaporator to the first evaporator.

In one embodiment, an adjusting valve is arranged at an outlet of the hot end and used for connecting or disconnecting the hot end and the first evaporator.

In one embodiment, a dry filter is disposed between the inlet of the second switching valve and the outlet of the condenser.

In one embodiment, the first evaporator is a freezing evaporator and the second evaporator is a refrigerating evaporator.

In an embodiment, the first throttling means and the second throttling means are both capillary tubes.

In one embodiment, the first switching valve and the second switching valve are three-way valves.

In one embodiment, the refrigerator refrigerating system further comprises a driving device, and the first switching valve is driven by the driving device to enable the first outlet to be communicated with the condenser or enable the second outlet to be communicated with the vortex tube.

The utility model also provides a refrigerator, this refrigerator includes refrigerator refrigerating system, and wherein this refrigerator refrigerating system includes:

the refrigerant is introduced into the circulation loop, and the circulation loop comprises a compressor, a condenser, a first throttling device and a first evaporator which are sequentially communicated;

a first switching valve having an inlet connected to the outlet of the compressor, the first switching valve having a first outlet connected to the condenser and a second outlet;

and the inlet of the vortex tube is connected with the second outlet, the vortex tube is provided with a hot end and a cold end, the outlet of the hot end is connected with the inlet of the first evaporator, and the outlet of the cold end is connected with the inlet of the compressor.

The utility model discloses technical scheme is when normal refrigeration mode, and first change-over valve only communicates the condenser, and the vortex tube import is closed. The refrigerant passes through the condenser and the drying filter in sequence, then passes through the second switching valve, and is directly led into the first throttling device and the second throttling device which are connected in parallel for throttling, wherein the refrigerant after being throttled by the second throttling device firstly passes through the refrigerating evaporator which is connected with the second throttling device in series, then enters the freezing heat exchanger together with the airflow passing through the first throttling device after passing through the one-way valve, then returns to the inlet of the compressor again, and continues to circulate. When defrosting is needed, a refrigerator refrigerating system sends a command to a first switching valve, a circulation loop entering a condenser is closed, and an air inlet of a vortex tube is communicated, so that high-temperature and high-pressure gas acted by a compressor enters the vortex tube along the tangential direction, the high-temperature and high-pressure gas rotates at a high speed to form a vortex, the gas along the wall of the vortex tube rubs with the tube wall to raise the temperature, one part of the gas flow goes out of the hot end of the vortex tube to form hot gas flow, the other part of the gas flow returns along the central line to form backflow, flows along the direction of the gas flow outside the hot end and generates heat exchange to form cold gas flow, and the cold gas flow and the gas flow after heat exchange of a freezing evaporator are converged and enter an inlet of the compressor. Therefore, the defrosting energy efficiency of the refrigerator is improved, and the energy loss is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a refrigeration system of a refrigerator according to the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "a and/or B" as an example, including either the a aspect, or the B aspect, or both the a and B aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In the conventional refrigeration system of a refrigerator, a refrigerant applies work through a compressor 100 to generate high-temperature and high-pressure gas, the high-temperature and high-pressure gas is condensed and released heat through a condenser 200 and then liquefied into saturated medium-temperature liquid, the saturated medium-temperature and medium-temperature liquid is throttled and reduced in pressure through a capillary tube to form low-temperature and low-pressure liquid, the low-temperature and low-pressure liquid enters a refrigeration evaporator to absorb heat after being absorbed by a refrigeration evaporator connected in parallel, and the refrigerant is evaporated into a low-temperature gas state and then returns to an inlet of the compressor 100 to complete refrigerant circulation.

Because the evaporator runs for a period of time, the air or the vapor in the food entering the refrigerator after the door is opened can be frosted on the surface of the evaporator, the heat exchange efficiency can be greatly reduced after the surface of the evaporator is frosted, and the negative influence of the frosting is difficult to eliminate by a passive means, generally, a high-power (100 plus 200W) electric heater is arranged at the lower end of the evaporator, the electric heater is turned on when the refrigerator refrigeration system is required to be defrosted, the electric heater is used for defrosting, and the heater is turned off and continues to refrigerate after the defrosting is finished. However, the defrosting heater mainly performs defrosting by heat radiation, and the amount of heat actually used for defrosting is only about 30%, and the heat utilization is limited. Not only is the electric heater added as an additional component, but also the electric heater has larger energy loss during operation, and additional heat load can be caused to the refrigerator.

The utility model discloses a refrigerator refrigerating system switches through first diverter valve 610 and makes the liquid refrigerant of high temperature high pressure pass through circulation circuit in and let in vortex tube 500 and change the frost circulation to can refrigerate fast to the refrigerator, also can change the frost to the evaporimeter in the refrigerator, reduced the refrigerator simultaneously and changed the frost energy consumption and prolonged the life of refrigerator. The user can freely switch between the normal refrigeration mode and the defrosting mode of the refrigerator, and the operation is convenient and quick. Furthermore, according to the utility model discloses a refrigerator refrigerating system structure is more simple, not only is convenient for make but also low in manufacturing cost.

The utility model provides a refrigerator refrigerating system includes circulation circuit, first change-over valve 610 and vortex tube 500, let in the refrigerant in the circulation circuit, the circulation circuit includes compressor 100, condenser 200, first throttling arrangement 310, the first evaporimeter 410 that communicate in proper order; an inlet of the first switching valve 610 is connected to an outlet of the compressor 100, the first switching valve 610 has a first outlet 611 and a second outlet 612, the first outlet 611 is connected to the condenser 200; the inlet of the vortex tube 500 is connected to the second outlet 612, the vortex tube 500 has a hot end 510 and a cold end 520, the outlet of the hot end 510 is connected to the inlet of the first evaporator 410, and the outlet of the cold end 520 is connected to the inlet of the compressor 100.

It should be noted that the vortex tube 500 is an energy separation device which has a simple structure, no moving parts, and easy control, and can separate high pressure into cold and hot air flows without consuming extra electric energy or mechanical energy, and the cold and hot separation effect has a larger relationship with the cold flow ratio and the intake pressure. Generally, the higher the pressure, the better the cold-hot separation effect. As the gas stream flows into the vortex tube 500, a swirling fluid mass is formed within the vortex tube 500. The inner air flow passes through the wind tunnel center of the outer air flow and due to the viscous relationship between the two air flows, the inner air flow is slower than the outer air flow, i.e., the inner air flow is attenuated in velocity as it passes through the center of the outer air flow. The air flow in the center of the vortex flows to the cold air outlet, expands when passing through the blowing air inlet and then cools. Therefore, the temperature of the air at the outer layer of the vortex is increased by the viscous work of the accelerated outer layer air flow, and the temperature of the air at the center part is decreased by diffusion when the air flows to the opposite direction. Also, because energy is proportional to the square of the velocity, the deceleration of the cold gas stream loses its energy through heat conduction. Thus, energy is transferred from the inner layer airflow to the outer layer airflow in a heat conduction mode, namely, the inner layer cold airflow is generated. When compressed air enters the vortex tube 500, it spins at a high speed near sonic velocity and flows to the hot gas outlet end of the vortex tube 500. Part of the hot gas flow exits from the hot end 510 of the vortex tube 500 and the remaining gas turns around to flow to the other end of the vortex tube 500 and flows as cold gas to the cold end 520 of the vortex tube 500. Meanwhile, the vortex tube 500 can adjust the air outlet flow ratio and the temperature at the cold end and the hot end by adjusting the adjusting valve 530 at the hot air outlet end, and can be adjusted according to different requirements.

Specifically, in the normal cooling mode, the first switching valve 610 is connected to only the inlet of the condenser 200, and the inlet of the vortex tube 500 is closed. The low-temperature low-pressure refrigerant gas is sucked by the compressor 100, then is pressurized into high-temperature high-pressure refrigerant gas, flows out, releases heat by the condenser 200, is liquefied into saturated medium-temperature liquid, is throttled and depressurized by the first throttling device 310 to form low-temperature low-pressure liquid, then absorbs heat by the first evaporator 410, and returns to the inlet of the compressor 100 after being evaporated into low-temperature gas, so that the refrigerant cycle is completed.

When defrosting is needed, the refrigerator refrigeration system sends a command to the first switching valve 610, a circulation loop entering the condenser 200 is closed, and an air inlet of the vortex tube 500 is communicated, so that high-temperature and high-pressure gas subjected to work of the compressor 100 enters the vortex tube 500 along a tangential direction, then rotates at a high speed to form a vortex, the gas along the wall of the vortex tube 500 rubs with the tube wall to raise the temperature, a part of the gas flow goes out from the hot end 510 of the vortex tube 500 to form a hot gas flow, the other part of the gas flow returns along a central line to form a backflow, flows with the direction of the gas flow outside the hot end 510 and exchanges heat to form a cold gas flow, and the cold gas flow and the gas flow after heat exchange of the first heat exchanger are converged and enter an inlet of the compressor 100. Therefore, in the defrosting mode, the discharge temperature of the hot end 510 is greatly raised by the vortex tube 500, and the discharge of the hot end 510 is directly introduced into the first evaporator 410 requiring defrosting. Because the temperature difference between the hot air flow and the wall surface of the evaporator is increased, the heat carried by the hot air flow is directly and thermally conducted to the interior of the frost layer through the pipe wall, the defrosting speed is greatly increased, the heat loss (mainly heat radiation) of defrosting by using a common electric heater is reduced, and the defrosting energy efficiency can be improved.

In an embodiment, the circulation loop further includes a second switching valve 620, a second evaporator 420 and a second throttling device 320, an inlet of the second switching valve 620 is connected to an outlet of the condenser 200; the second switching valve 620 has a third outlet 621 and a fourth outlet 622, the third outlet 621 is connected to the inlet of the first throttling device 310, the fourth outlet 622 is connected to the inlet of the second throttling device 320, the outlet of the second throttling device 320 is connected to the inlet of the second evaporator 420, and the outlet of the second evaporator 420 is connected to the inlet of the first evaporator 410.

It will be appreciated that in normal cooling mode, the first switching valve 610 is only connected to the condenser 200 and the vortex tube 500 inlet is closed. The refrigerant passes through the condenser 200 in sequence, then passes through the second switching valve 620, and is directly introduced into the first throttling device 310 and the second throttling device 320 connected in parallel for throttling, wherein the refrigerant after being throttled by the second throttling device 320 firstly passes through the second evaporator 420 connected in series with the second throttling device, then enters the first evaporator 410 together with the airflow passing through the first throttling device 310, and then returns to the inlet of the compressor 100 again, and continues to circulate.

When defrosting is needed, the refrigerator refrigeration system sends a command to the first switching valve 610, a circulation loop entering the condenser 200 is closed, and an air inlet of the vortex tube 500 is communicated, so that high-temperature and high-pressure gas subjected to work of the compressor 100 enters the vortex tube 500 along a tangential direction, then rotates at a high speed to form a vortex, the gas along the wall of the vortex tube 500 rubs with the tube wall to raise the temperature, a part of the gas flow goes out from the hot end 510 of the vortex tube 500 to form hot gas flow, the other part of the gas flow returns along a central line to form backflow, flows with the direction of the gas flow outside the hot end 510 and exchanges heat to form cold gas flow, and the cold gas flow and the gas flow after heat exchange of the first heat exchanger are converged and enter an inlet of the compressor 100. The hot air flow with higher temperature flows into the inlet of the first evaporator 410, and the heat carried by the hot air flow is directly and thermally conducted to the interior of the frost layer through the wall by the temperature difference between the hot air flow and the wall of the first evaporator 410. So set up, reduced electric heater's extra setting, vortex tube 500 compares with electric heater moreover, and vortex tube 500 simple structure, no moving part, the energy separator of easy control need not consume extra electric energy or mechanical energy and just can become cold and hot two air currents with other separation of high pressure to utilize the hot gas flow to defrost first evaporimeter 410, improve the efficiency.

In order to prevent the hot air from reversely flowing into the second evaporator 420 which does not require defrosting and needs to maintain low temperature in the defrosting mode, in an embodiment, a check valve 700 is disposed between the inlet of the first evaporator 410 and the outlet of the second evaporator 420, and the conduction direction of the check valve 700 is from the second evaporator 420 to the first evaporator 410. It can be understood that, by the addition of the check valve 700, the hot air flow is effectively prevented from flowing back to the second evaporator 420, and if the hot air flow flows back to the second evaporator 420 which needs to maintain a low temperature, the second evaporator 420 is heated by the hot air flow, thereby reducing the heat exchange efficiency of the second evaporator 420.

In one embodiment, a regulating valve 530 is disposed at an outlet of the hot end 510, and the regulating valve 530 is used for connecting or disconnecting the hot end 510 and the first evaporator 410. The ratio of cold to hot gas flow and the limit temperature of separation can be adjusted by adjusting the regulating valve 530 at the outlet of the hot end 510 of the vortex tube 500. In the present invention, the opening can be adjusted by the adjusting valve 530 to increase the air flow to the hot end 510 to the highest temperature and to ensure a certain flow rate of the hot air. Generally, the hot side 510 outlet temperature may be increased by 30 to 50 ℃ compared to the inlet air, depending on the pressure. Therefore, based on the problem of defrosting of the existing refrigerator evaporator, the vortex tube 500 is connected to the closed refrigerator refrigeration system, and the appropriate cold flow ratio is adjusted to enable the temperature and the flow rate of hot air flow to be in the optimal range for active defrosting, so that the need of configuring a separate and extra power-consuming electric heater is avoided. In the defrosting mode, the exhaust temperature of the hot end 510 is greatly increased through the vortex tube 500, and the exhaust of the hot end 510 is directly led into an evaporator needing defrosting. Because the temperature difference between the hot air flow and the wall surface of the first evaporator 410 is increased, the heat carried by the hot air flow is directly conducted into the frost layer through the pipe wall, the defrosting speed is greatly increased, the heat loss (mainly heat radiation) of defrosting by using a common electric heater is reduced, and the defrosting energy efficiency can be improved.

In order to filter the physical dust and residual moisture in the refrigerator system during the flowing process of the refrigerant and prevent the refrigerator system from being clogged or frozen, in one embodiment, a filter dryer 800 is disposed between the inlet of the second switching valve 620 and the outlet of the condenser 200. It is understood that the dry filter 800 is a device having dual functions of adsorbing moisture and filtering the refrigerant, which can not only remove residual moisture in the refrigeration system of the refrigerator to prevent ice blockage and reduce the corrosion of moisture to the refrigeration system of the refrigerator, but also filter out impurities, such as metal chips, various oxides, dust, etc., in the refrigeration system of the refrigerator, so that the flow path between the condenser 200 and the second switching valve 620 can be prevented from being dirty.

In combination with the above embodiments, in one embodiment, the first evaporator 410 is a freezing evaporator, and the second evaporator 420 is a refrigerating evaporator. In the normal cooling mode, the first switching valve 610 is only communicated with the condenser 200, and the inlet of the vortex tube 500 is closed. The refrigerant passes through the condenser 200, the dry filter 800, and then the second switching valve 620 in sequence, and is directly introduced into the first throttling device 310 and the second throttling device 320 connected in parallel for throttling, wherein the refrigerant after being throttled by the second throttling device 320 passes through the refrigeration evaporator connected in series with the second throttling device, and then enters the refrigeration heat exchanger together with the airflow passing through the first throttling device 310 after passing through the check valve 700, and then returns to the inlet of the compressor 100 again, and continues to circulate.

When defrosting is needed, the refrigeration system of the refrigerator sends a command to the first switching valve 610, a circulation loop entering the condenser 200 is closed, and an air inlet of the vortex tube 500 is communicated, so that high-temperature and high-pressure gas subjected to work of the compressor 100 enters the vortex tube 500 along a tangential direction, then the high-temperature and high-pressure gas rotates at a high speed to form a vortex, the gas along the wall of the vortex tube 500 rubs with the tube wall to heat up, a part of the gas flow goes out from the hot end 510 of the vortex tube 500 to form hot gas flow, the other part of the gas flow returns along a central line to form backflow, flows in the direction of the gas flow outside the hot end 510, and exchanges heat to form cold gas flow, and the cold gas flow and the gas flow after heat exchange of the refrigeration evaporator are converged and enter an inlet of the compressor 100 together.

In one embodiment, the first throttling device 310 and the second throttling device 320 are both capillary tubes. Since the capillary tube has a low cost and a wide and comprehensive specification, the manufacturing cost of the refrigerator cooling system can be reduced by setting both the first throttle 310 and the second throttle 320 as the capillary tube.

In one embodiment, the first switching valve 610 and the second switching valve 620 are three-way valves. Since the three-way valve has a wide and comprehensive specification, the refrigeration mode and the defrosting mode of the refrigerator refrigeration system can be flexibly switched by setting both the first switching valve 610 and the second switching valve 620 as the three-way valves.

In one embodiment, the refrigerator cooling system further comprises a driving device, and the first switching valve 610 is driven by the driving device to communicate the first outlet 611 with the condenser 200 or communicate the second outlet 612 with the vortex tube 500. The driving means may be one of a stepping motor or a two-position three-way solenoid valve, and may be capable of facilitating control of opening or closing of the first outlet 611 and the second outlet 612 of the first switching valve 610 to cycle between the cooling mode and the defrosting mode.

The utility model also provides a refrigerator, this refrigerator includes casing and refrigerator refrigerating system, and this refrigerator refrigerating system's concrete structure refers to above-mentioned embodiment, because this refrigerator refrigerating system has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims (10)

1. A refrigeration system for a refrigerator, comprising:

the refrigerant is introduced into the circulation loop, and the circulation loop comprises a compressor, a condenser, a first throttling device and a first evaporator which are sequentially communicated;

a first switching valve having an inlet connected to an outlet of the compressor, the first switching valve having a first outlet and a second outlet, the first outlet connected to the condenser;

and the inlet of the vortex tube is connected with the second outlet, the vortex tube is provided with a hot end and a cold end, the outlet of the hot end is connected with the inlet of the first evaporator, and the outlet of the cold end is connected with the inlet of the compressor.

2. The refrigeration system of claim 1 wherein said circulation loop further comprises a second switching valve, a second evaporator and a second throttling means, an inlet of said second switching valve being connected to an outlet of said condenser;

the second switching valve is provided with a third outlet and a fourth outlet, the third outlet is connected with the inlet of the first throttling device, the fourth outlet is connected with the inlet of the second throttling device, the outlet of the second throttling device is connected with the inlet of the second evaporator, and the outlet of the second evaporator is connected with the inlet of the first evaporator.

3. A refrigerating system as recited in claim 2 wherein a check valve is disposed between an inlet of said first evaporator and an outlet of said second evaporator, said check valve being directed from said second evaporator toward said first evaporator.

4. A refrigerating system as recited in claim 3 wherein an outlet of said hot end is provided with a regulating valve for connecting or disconnecting said hot end to said first evaporator.

5. The refrigeration system of claim 4 wherein a desiccant filter is disposed between the inlet of said second switching valve and the outlet of said condenser.

6. The refrigerator refrigeration system of claim 5 wherein said first evaporator is a freezer evaporator and said second evaporator is a chiller evaporator.

7. The refrigerator chiller system of claim 5 wherein said first restriction and said second restriction are both capillary tubes.

8. The refrigerator chiller system of claim 5, wherein the first switching valve and the second switching valve are three-way valves.

9. The refrigerator cooling system as claimed in claim 8, further comprising a driving means, wherein the first switching valve is driven by the driving means to communicate the first outlet with the condenser or to communicate the second outlet with the vortex tube.

10. A refrigerator characterized by comprising the refrigeration system of a refrigerator as claimed in any one of claims 1 to 9.

Images