Refrigerating system and refrigerator
By using separate refrigeration and freezing throttling devices in air-cooled refrigerators, the refrigeration throttling device is used to achieve natural defrosting of the evaporator in the refrigeration and cooling mode, which solves the problem of increased power consumption caused by evaporator frosting and achieves energy saving.
Patent Information
- Application Number
- CN202422462485.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-11
AI Technical Summary
In existing air-cooled refrigerators, frost easily forms on the evaporator surface during refrigeration and freezing, resulting in increased power consumption.
Separate refrigeration throttling devices and freezing throttling devices are used to control the refrigerant flow direction through a switching unit. The refrigeration throttling device is used to achieve natural defrosting of the evaporator in the refrigeration and cooling mode, reducing the use of heating devices.
In the refrigeration mode, the evaporator can be naturally defrosted without a heating device, which reduces the energy consumption of the refrigerator.
Smart Images
Figure CN223319289U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of household appliances, and in particular to a refrigeration system and a refrigerator. Background Art
[0002] With the improvement of people's living standards, refrigerators have become one of the indispensable electrical appliances in modern family life. Refrigerators are mainly divided into direct cooling refrigerators, air-cooling refrigerators, hybrid refrigerators and inverter refrigerators. Among them, the principle of air-cooling refrigerators is to use air for cooling. When high-temperature air flows through the built-in evaporator, due to the high air temperature and low evaporator temperature, the two directly exchange heat, the air temperature will drop, and cold air will be blown into the refrigerator. The temperature of the refrigerator is lowered through this continuous circulation method.
[0003] Existing air-cooled refrigerators use the same throttling device for both refrigeration and freezing. This results in the evaporator surface having a very low temperature and severe frost during both refrigeration and freezing. Therefore, a heating device is required to defrost the evaporator, which increases the power consumption of the refrigerator. Utility Model Content
[0004] Based on this, an embodiment of the present application provides a refrigeration system and a refrigerator.
[0005] In a first aspect, an embodiment of the present application provides a refrigeration system, comprising a compressor, a condenser, a switching unit, a refrigeration throttling device, a freezing throttling device, and an evaporator;
[0006] One end of the compressor is connected to the evaporator, and the other end is connected to the condenser;
[0007] The switching unit has a first interface, a second interface, and a third interface. The first interface is connected to the end of the condenser away from the compressor, the second interface is connected to the refrigeration throttling device, and the third interface is connected to the freezing throttling device. The switching unit can control the opening and closing of the second interface and the third interface.
[0008] One end of the refrigeration throttling device away from the switching unit is connected to one end of the evaporator away from the compressor, and one end of the freezing throttling device away from the switching unit is connected to one end of the evaporator away from the compressor.
[0009] In some embodiments, the switching unit is a solenoid valve or an electric switching valve.
[0010] In some embodiments, the refrigeration throttling device is a capillary tube, a thermal expansion valve, an electronic expansion valve or a float throttling valve.
[0011] In some embodiments, the refrigeration throttling device is a capillary tube, a thermal expansion valve, an electronic expansion valve or a float throttling valve.
[0012] In some embodiments, the refrigeration throttling device and the freezing throttling device are connected to the evaporator in parallel.
[0013] In a second aspect, an embodiment of the present application provides a refrigerator comprising the refrigeration system as described above.
[0014] In some embodiments, the refrigerator further includes a box, and the refrigeration system is installed on the box.
[0015] In some embodiments, the box body is provided with a refrigeration compartment and a freezer compartment, and the refrigeration system is provided with a refrigeration mode and a freezing mode;
[0016] When the refrigeration system operates in a refrigeration mode, the refrigeration system is used to refrigerate the refrigeration compartment. At this time, the second interface of the switching unit is opened to connect the condenser and the refrigeration throttling device, and the third interface is closed;
[0017] When the refrigeration system operates in a freezing and cooling mode, the refrigeration system is used to cool the freezer compartment. At this time, the second interface of the switching unit is closed, and the third interface is opened to connect the condenser and the freezing throttling device.
[0018] In some embodiments, the refrigerator further includes a heating device in contact with the evaporator, wherein the heating device is configured to heat the evaporator to achieve defrosting when frost forms on the surface of the evaporator.
[0019] In some embodiments, when frost forms on the surface of the evaporator during operation of the refrigeration system in a freezing and cooling mode, the compressor is stopped and the heating device is started to heat the evaporator to achieve defrosting.
[0020] When frost forms on the surface of the evaporator during operation of the refrigeration system in the refrigeration mode, the compressor is stopped and the frost on the surface of the evaporator is melted by air circulation in the refrigeration chamber to achieve defrosting.
[0021] The refrigeration system provided in the embodiment of the present application includes a refrigeration throttling device and a freezing throttling device. Therefore, in the refrigeration mode, the second interface can be opened when the third interface of the switching unit is closed, so that the refrigerant can only pass through the refrigeration throttling device but cannot pass through the freezing throttling device. Since the flow rate of the refrigeration throttling device is large in the refrigeration mode, the pressure of the refrigerant is large and the temperature is high at this time, so that the evaporator surface has a relatively high temperature (about -10°C). When frosting forms on the evaporator surface, there is no need to use a heating device to heat the evaporator. When the compressor stops running, the higher temperature gas circulation in the cold storage room can be used to achieve natural defrosting of the evaporator, thereby reducing the power consumption of the refrigerator and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for describing the embodiments.
[0023] Figure 1 A schematic diagram of the structure of the refrigeration system provided in an embodiment of the present application.
[0024] Component Symbol Description:
[0025] 100. Refrigeration system; 20. Compressor; 30. Condenser; 40. Switching unit; 50. Refrigeration throttling device; 60. Refrigeration throttling device; 70. Evaporator. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.
[0027] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0029] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0031] See also Figure 1 An embodiment of the present application provides a refrigeration system 100, including a compressor 20, a condenser 30, a switching unit 40, a refrigeration throttling device 50, a freezing throttling device 60 and an evaporator 70.
[0032] See also Figure 1 One end of the compressor 20 is connected to the evaporator 70 , and the other end is connected to the condenser 30 .
[0033] See also Figure 1 The switching unit 40 has a first interface, a second interface and a third interface. The first interface is connected to the end of the condenser 30 away from the compressor 20, the second interface is connected to the refrigeration throttling device 50, and the third interface is connected to the freezing throttling device 60. The switching unit 40 can control the opening and closing of the second interface and the third interface.
[0034] See also Figure 1 The end of the refrigeration throttling device 50 away from the switching unit 40 is connected to the end of the evaporator 70 away from the compressor 20, and the end of the freezing throttling device 60 away from the switching unit 40 is connected to the end of the evaporator 70 away from the compressor 20.
[0035] It can be understood that the working principle of the refrigeration system 100 of the embodiment of the present application is: after the refrigerant is discharged from the exhaust port of the compressor 20, the refrigerant is condensed and dissipated through the condenser 30 in turn, throttled and reduced in pressure through the refrigeration throttling device 50 or the freezing throttling device 60, evaporated through the evaporator 70 and generates cold energy to cool the storage room of the refrigerator (such as the cold storage room or the freezer room), and finally returns to the intake port of the compressor 20 and circulates.
[0036] When the above-mentioned refrigeration system 100 is applied to a refrigerator, the refrigeration system 100 can operate in a refrigeration mode or a freezing mode. When the refrigeration system 100 operates in the refrigeration mode, the third interface of the switching unit 40 is closed and the second interface is opened, so that the refrigerant can only pass through the refrigeration throttling device 50 but cannot pass through the freezing throttling device 60; when the refrigeration system 100 operates in the freezing mode, the second interface of the switching unit 40 can be closed and the third interface can be opened, so that the refrigerant can only pass through the freezing throttling device 60 but cannot pass through the refrigeration throttling device 50.
[0037] Exemplarily, the switching unit 40 is capable of controlling the flow rate of the refrigerant flowing out of the second interface and the third interface. In some embodiments, the refrigeration throttling device 50 and the freezing throttling device 60 may be identical, that is, the throttling capabilities of the refrigeration throttling device 50 and the freezing throttling device 60 are the same. In this case, the flow rates of the refrigeration throttling device 50 and the freezing throttling device 60 can be controlled by controlling the opening degree of the second interface and the third interface of the switching unit 40.
[0038] In some other embodiments, the throttling capabilities of the refrigeration throttling device 50 and the freezing throttling device 60 are different, and the flow rates of the refrigeration throttling device 50 and the freezing throttling device 60 can be controlled by controlling the degree of opening of their respective valves.
[0039] To sum up, the refrigeration system 100 provided in the embodiment of the present application includes a refrigeration throttling device 50 and a freezing throttling device 60. Therefore, in the refrigeration mode, the second interface can be opened while closing the third interface of the switching unit 40, so that the refrigerant can only pass through the refrigeration throttling device 50 but cannot pass through the freezing throttling device 60. Since the flow rate of the refrigeration throttling device 50 is large in the refrigeration mode, the pressure of the refrigerant is large and the temperature is high at this time, so that the surface of the evaporator 70 has a relatively high temperature (about -10°C). When frosting forms on the surface of the evaporator 70, there is no need to use a heating device to heat the evaporator 70. When the compressor 20 stops running, the higher temperature gas circulation in the cold storage room can be used to achieve natural defrosting of the evaporator 70, thereby reducing the power consumption of the refrigerator and saving energy.
[0040] It can be understood that in the freezing and refrigeration mode, the third interface can be opened while closing the second interface of the switching unit 40, so that the refrigerant can only pass through the freezing throttling device 60 and cannot pass through the refrigeration throttling device 50. Since the flow rate of the freezing throttling device 60 is small in the freezing and refrigeration mode, the pressure of the refrigerant is small and the temperature is low, so that the surface of the evaporator 70 has a relatively low temperature (about -30°C). At this time, when frost forms on the surface of the evaporator 70, the frost is generally thicker. At this time, a heating device (such as an electric heating tube) can be used to heat the evaporator 70 to achieve a better defrosting effect.
[0041] For example, the switching unit 40 is a solenoid valve or an electric switching valve. It is understandable that the switching unit 40 is a three-way valve.
[0042] Exemplarily, the refrigeration throttling device 50 is a capillary tube, a thermal expansion valve, an electronic expansion valve or a float throttling valve.
[0043] Exemplarily, the refrigeration throttling device 60 is a capillary tube, a thermal expansion valve, an electronic expansion valve or a float throttling valve.
[0044] See also Figure 1 , exemplarily, the refrigeration throttling device 50 and the freezing throttling device 60 are connected to the evaporator 70 in parallel.
[0045] An embodiment of the present application further provides a refrigerator, comprising the refrigeration system 100 in any of the above embodiments.
[0046] Illustratively, the refrigerator according to the embodiment of the present application may be an upright air-cooled refrigerator or a horizontal air-cooled refrigerator.
[0047] Illustratively, the refrigerator further includes a box body, and the refrigeration system 100 is installed on the box body.
[0048] Exemplarily, a refrigeration compartment and a freezer compartment are provided in the box, and the refrigeration system 100 is provided with a refrigeration mode and a freezing mode;
[0049] When the refrigeration system 100 operates in the refrigeration mode, the refrigeration system 100 is used to refrigerate the refrigeration compartment. At this time, the second interface of the switching unit 40 is opened to connect the condenser 30 and the refrigeration throttling device 50, and the third interface is closed.
[0050] When the refrigeration system 100 operates in the freezing and cooling mode, the refrigeration system 100 is used to cool the freezer compartment. At this time, the second interface of the switching unit 40 is closed, and the third interface is opened to connect the condenser 30 and the freezing throttling device 60.
[0051] Exemplarily, the temperature of the refrigerator compartment is 2°C to 8°C (eg, 4°C), and the temperature of the freezer compartment is -18°C to -24°C (eg, -20°C).
[0052] Exemplarily, the refrigerator further includes a heating device in contact with the evaporator 70 , and the heating device is used to heat the evaporator 70 to achieve defrosting when frost forms on the surface of the evaporator 70 .
[0053] Exemplarily, the heating device includes an electric heating tube.
[0054] For example, when frost forms on the surface of the evaporator 70 during operation of the refrigeration system 100 in the freezing and cooling mode, the compressor 20 is stopped and the heating device is started to heat the evaporator 70 to achieve defrosting.
[0055] When frost forms on the surface of the evaporator 70 during operation of the refrigeration system 100 in the refrigeration mode, the compressor 20 stops working and the frost on the surface of the evaporator 70 is melted by air circulation in the refrigeration chamber, thereby achieving defrosting.
[0056] It is understandable that when the refrigeration system 100 is operating in the refrigeration mode and frost forms on the surface of the evaporator 70, the surface temperature of the evaporator 70 is relatively high (about -10°C), so the frost on the surface of the evaporator 70 is relatively thin. At this time, there is no need to use a heating device to heat the evaporator 70. During the time when the compressor 20 stops running, the circulation of the higher temperature gas (about 4°C) in the cold storage room can be used to achieve natural defrosting of the evaporator 70, thereby reducing the power consumption of the refrigerator and saving energy. Furthermore, during the defrosting process of the evaporator 70 in the refrigeration mode, the fan in the air duct system can be used to speed up the air circulation, thereby speeding up the defrosting speed. It is understandable that during the process of defrosting the evaporator 70 using the gas in the cold storage room, the frost on the surface of the evaporator 70 will absorb the heat in the gas, thereby lowering the temperature of the gas, so that the temperature in the cold storage room is maintained at a lower level.
[0057] However, when frost forms on the surface of the evaporator 70 during operation of the refrigeration system 100 in freezing mode, the surface temperature of the evaporator 70 is relatively low (around -30°C), so the frost on the surface of the evaporator 70 is relatively thick. At this time, the temperature of the gas in the freezer compartment is relatively low (around -20°C) and cannot be used for defrosting. Therefore, a heating device (such as an electric heating tube) is required to heat the evaporator 70 to achieve a better defrosting effect.
[0058] Exemplarily, the refrigerator also includes an evaporator chamber, in which the evaporator 70 is arranged, and the air duct system of the refrigerator includes a gas circulation air duct between the evaporator chamber and the refrigerating chamber and a gas circulation air duct between the evaporator chamber and the freezer chamber, and a first air damper is provided between the evaporator chamber and the refrigerating chamber, and a second air damper is provided between the evaporator chamber and the freezer chamber; when the refrigerator is operated in the refrigerating mode, the first air damper is opened and the second air damper is closed, so that the gas circulation between the evaporator chamber and the refrigerating chamber proceeds normally, and at the same time, the gas circulation between the evaporator chamber and the freezer chamber stops; when the refrigerator is operated in the freezing mode, the second air damper is opened and the first air damper is closed, so that the gas circulation between the evaporator chamber and the freezer chamber proceeds normally, and at the same time, the gas circulation between the evaporator chamber and the refrigerating chamber stops.
[0059] The above describes in detail the refrigeration system and refrigerator provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is intended only to facilitate understanding of the present application. Furthermore, those skilled in the art will appreciate that variations in the specific implementation methods and scope of application may occur based on the principles of the present application. In summary, the contents of this specification should not be construed as limiting the present application.
Claims
1. A refrigeration system, characterized in that: It includes a compressor, a condenser, a switching unit, a refrigeration throttling device, a freezing throttling device and an evaporator; One end of the compressor is connected to the evaporator, and the other end is connected to the condenser; The switching unit has a first interface, a second interface, and a third interface. The first interface is connected to the end of the condenser away from the compressor, the second interface is connected to the refrigeration throttling device, and the third interface is connected to the freezing throttling device. The switching unit can control the opening and closing of the second interface and the third interface. One end of the refrigeration throttling device away from the switching unit is connected to one end of the evaporator away from the compressor, and one end of the freezing throttling device away from the switching unit is connected to one end of the evaporator away from the compressor.
2. The refrigeration system according to claim 1, characterized in that The switching unit is a solenoid valve or an electric switching valve.
3. The refrigeration system according to claim 1, wherein: The refrigeration throttling device is a capillary tube, a thermal expansion valve, an electronic expansion valve or a float throttling valve.
4. The refrigeration system according to claim 1, wherein: The refrigeration throttling device is a capillary tube, a thermal expansion valve, an electronic expansion valve or a floating ball throttling valve.
5. The refrigeration system according to any one of claims 1 to 4, characterized in that: The refrigeration throttling device and the freezing throttling device are connected to the evaporator in parallel.
6. A refrigerator, characterized in that: A refrigeration system comprising the refrigeration system according to any one of claims 1 to 5.
7. The refrigerator according to claim 6, characterized in that The refrigerator further comprises a box body, and the refrigeration system is installed on the box body.
8. The refrigerator according to claim 7, characterized in that The box body is provided with a refrigeration chamber and a freezer chamber, and the refrigeration system is provided with a refrigeration mode and a freezing mode; When the refrigeration system operates in a refrigeration mode, the refrigeration system is used to refrigerate the refrigeration compartment. At this time, the second interface of the switching unit is opened to connect the condenser and the refrigeration throttling device, and the third interface is closed; When the refrigeration system operates in a freezing and cooling mode, the refrigeration system is used to cool the freezer compartment. At this time, the second interface of the switching unit is closed, and the third interface is opened to connect the condenser and the freezing throttling device.
9. The refrigerator according to any one of claims 6 to 8, characterized in that: The refrigerator further comprises a heating device in contact with the evaporator, wherein the heating device is used to heat the evaporator to achieve defrosting when frost forms on the surface of the evaporator.
10. The refrigerator according to claim 9, characterized in that When frost forms on the surface of the evaporator during operation of the refrigeration system in a freezing and cooling mode, the compressor is stopped and the heating device is started to heat the evaporator to achieve defrosting; When frost forms on the surface of the evaporator during operation of the refrigeration system in the refrigeration mode, the compressor is stopped and the frost on the surface of the evaporator is melted by air circulation in the refrigeration chamber to achieve defrosting.