Supercooling device, air conditioning system and automobile

Abstract

The utility model belongs to refrigeration and air conditioning technical field discloses a supercooling device, air conditioning system and car, supercooling device includes condenser structure and cooling medium flow structure, refrigerant can flow in condenser structure, and condenser structure includes condenser and first supercooler, and the export of condenser communicates with the entrance of first supercooler;Cooling medium can circulate and flow in cooling medium flow structure, and cooling medium is divided into two parts at the export of first cooling medium pipeline, and one part enters condenser and absorbs the heat of refrigerant through second cooling medium pipeline, and the other part passes through first supercooler through third cooling medium pipeline, and the temperature of refrigerant at condenser export is further reduced, and refrigerant is in lower enthalpy state before throttling, to realize higher unit mass refrigerating capacity of refrigerant, thereby improve the performance coefficient (COP) of refrigeration system, reach the effect that reduces energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration and air conditioning technology, and in particular to a subcooling device, an air conditioning system, and an automobile. Background Technology

[0002] The first subcooler is an important component of the refrigeration system. Its working principle is to use the temperature difference between certain components in the refrigeration system to further cool the refrigerant liquid after condensation, so as to reach a subcooling temperature lower than the condensation temperature, thereby improving the efficiency and performance of the refrigeration system.

[0003] With the booming development of new energy vehicles and the emergence of new models, "range anxiety" has become a persistent concern for consumers. Data shows that air conditioning systems account for up to 25% of a vehicle's energy consumption in winter, meaning that for every 4 kilometers driven, 1 kilometer is used for heating. In summer, cooling also reduces range by 10%-15%. Adding a primary subcooler can effectively improve the COP (coefficient of performance) of the air conditioning system, reduce throttling losses, improve system stability, and further reduce energy consumption, becoming an effective means of alleviating range anxiety. However, the cooling effect of refrigerants still cannot meet people's daily needs.

[0004] Therefore, there is an urgent need to propose a supercooling device, air conditioning system, and automobile to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a subcooling device to achieve a higher cooling capacity per unit mass of refrigerant, thereby improving the coefficient of performance (COP) of the refrigeration system and reducing energy consumption.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A subcooling device, comprising:

[0008] The condenser structure allows refrigerant to flow within it. The condenser structure includes a condenser and a first subcooler, with the outlet of the condenser connected to the inlet of the first subcooler.

[0009] The cooling medium circulation structure allows the cooling medium to circulate within it. The cooling medium circulation structure includes a first cooling medium pipe, a second cooling medium pipe, a third cooling medium pipe, and a fourth cooling medium pipe. The inlets of the second and third cooling medium pipes are connected to the outlet of the first cooling medium pipe, and the outlets of the second and third cooling medium pipes are connected to the inlet of the fourth cooling medium pipe. The second cooling medium pipe flows through the condenser, and the third cooling medium pipe flows through the first subcooler.

[0010] Preferably, the cooling medium is water or air.

[0011] Preferably, the flow direction of the cooling medium in the third cooling medium pipeline is opposite to the flow direction of the refrigerant in the first subcooler;

[0012] And / or, the flow direction of the cooling medium in the second cooling medium pipe is opposite to the flow direction of the refrigerant in the condenser.

[0013] Preferably, the subcooling device also includes an integrated liquid storage tank, which is integrated on the condenser. The outlet of the condenser is connected to the inlet of the liquid storage tank, and the cooling medium does not flow through the liquid storage tank.

[0014] Another objective of this invention is to provide an air conditioning system that achieves a higher cooling capacity per unit mass of refrigerant, thereby improving the coefficient of performance (COP) of the air conditioning system and reducing energy consumption.

[0015] To achieve this objective, the present invention adopts the following technical solution:

[0016] An air conditioning system includes a compressor and the aforementioned subcooling device. The compressor has an exhaust port and an intake port. The exhaust port is connected to the inlet of the condenser, and the outlet of the first subcooler is connected to the intake port.

[0017] Preferably, the air conditioning system also includes an evaporator, the inlet of which is connected to the outlet of the first subcooler, and the outlet of which is connected to the suction port.

[0018] Preferably, the air conditioning system also includes a control valve, the inlet of which is connected to the outlet of the first subcooler, and the outlet of which is connected to the inlet of the evaporator.

[0019] Preferably, the air conditioning system also includes a detection unit that can detect the temperature and pressure of the refrigerant at the intake port.

[0020] Preferably, the number of detection units is at least two.

[0021] Another objective of this invention is to provide a vehicle that achieves a higher cooling capacity per unit mass of refrigerant in the air conditioning system, thereby improving the coefficient of performance (COP) of the air conditioning system and reducing vehicle energy consumption.

[0022] To achieve this objective, the present invention adopts the following technical solution:

[0023] An automobile includes a body and the aforementioned air conditioning system, the air conditioning system being installed within the body.

[0024] The beneficial effects of this utility model are:

[0025] This utility model provides a subcooling device, an air conditioning system, and an automobile. The subcooling device includes a condenser structure and a cooling medium circulation structure. Refrigerant can circulate in the condenser structure, which includes a condenser and a first subcooler. The outlet of the condenser is connected to the inlet of the first subcooler. The cooling medium can circulate in the cooling medium circulation structure, which includes a first cooling medium pipe, a second cooling medium pipe, a third cooling medium pipe, and a fourth cooling medium pipe. The inlets of the second and third cooling medium pipes are both connected to the outlet of the first cooling medium pipe, and the outlets of the second and third cooling medium pipes are both connected to the inlet of the fourth cooling medium pipe. The third cooling medium pipe flows through the first subcooler, and the second cooling medium pipe flows through the condenser. The cooling medium is divided into two parts at the outlet of the first cooling medium pipe. One part enters the condenser through the second cooling medium pipe to absorb the heat of the refrigerant, and the other part passes through the third cooling medium pipe and the first subcooler to further reduce the temperature of the refrigerant at the outlet of the condenser. This allows the refrigerant to be in a lower enthalpy state before throttling, thereby achieving a higher cooling capacity per unit mass of the refrigerant. This improves the coefficient of performance (COP) of the refrigeration system and reduces energy consumption. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the subcooling device provided in this embodiment.

[0027] In the picture:

[0028] 11. Condenser; 12. First subcooler; 21. First cooling medium pipeline; 22. Second cooling medium pipeline; 23. Third cooling medium pipeline; 24. Fourth cooling medium pipeline; 3. Compressor; 4. Evaporator; 5. Control valve; 6. Detection unit. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] This embodiment provides a subcooling device to achieve a higher cooling capacity per unit mass of refrigerant, thereby improving the coefficient of performance (COP) of the refrigeration system and reducing energy consumption.

[0034] Specifically, such as Figure 1As shown, a subcooling device includes a condenser structure and a cooling medium circulation structure. Refrigerant can circulate in the condenser structure, which includes a condenser 11 and a first subcooler 12. The outlet of the condenser 11 is connected to the inlet of the first subcooler 12. The cooling medium can circulate in the cooling medium circulation structure, which includes a first cooling medium pipe 21, a second cooling medium pipe 22, a third cooling medium pipe 23, and a fourth cooling medium pipe 24. The inlets of the second cooling medium pipe 22 and the third cooling medium pipe 23 are both connected to the outlet of the first cooling medium pipe 21, and the outlets of the second cooling medium pipe 22 and the third cooling medium pipe 23 are both connected to the inlet of the fourth cooling medium pipe 24. The second cooling medium pipe 22 flows through the condenser 11, and the third cooling medium pipe 23 flows through the first subcooler. The cooling medium is divided into two parts at the outlet of the first cooling medium pipe 21. One part enters the condenser 11 through the second cooling medium pipe 22 to absorb heat from the refrigerant, while the other part passes through the third cooling medium pipe 23 and the first subcooler 12 to further reduce the temperature of the refrigerant at the outlet of the condenser 11. This lowers the enthalpy of the refrigerant before throttling, resulting in a higher cooling capacity per unit mass and thus improving the coefficient of performance (COP) of the refrigeration system, thereby reducing energy consumption. Furthermore, the outlet of the condenser 11 is connected to the inlet of the first subcooler 12, allowing the entire subcooling device to be compatible with various refrigerants, including but not limited to R134a, R1234yf, CO2, or R290. In other embodiments, the first subcooler 12 may also be integrated into the condenser 11.

[0035] Furthermore, the cooling medium is water. Water has a high specific heat capacity, enabling it to absorb a large amount of heat while its own temperature rises relatively little. This effectively removes heat from the refrigerant, thus achieving a good cooling effect. In other embodiments, the cooling medium can also be air or refrigerant from other low-temperature circuits in the refrigeration system.

[0036] Optionally, the flow direction of the cooling medium in the second cooling medium pipe 22 is opposite to the flow direction of the refrigerant in the condenser 11, and the flow direction of the cooling medium in the third cooling medium pipe 23 is opposite to the flow direction of the refrigerant in the first subcooler 12. At the outlet end of the condenser 11, the temperature of the cooling medium just entering is lower, while the temperature of the refrigerant about to flow out is higher, resulting in a large temperature difference, which is beneficial for heat transfer from the refrigerant to the cooling medium. At the inlet end of the condenser 11, the temperature of the cooling medium about to flow out is higher, while the temperature of the refrigerant just entering is lower, and the temperature difference remains large. Throughout the heat exchange process, a high average temperature difference can be maintained, thereby achieving high heat exchange efficiency and more effectively cooling and condensing the refrigerant. In other embodiments, the flow direction of the cooling medium in the second cooling medium pipe 22 is opposite to the flow direction of the refrigerant in the condenser 11, or the flow direction of the cooling medium in the third cooling medium pipe 23 is opposite to the flow direction of the refrigerant in the first subcooler 12.

[0037] Optionally, the subcooling device also includes an integrated liquid receiver (not shown in the figure), which is integrated onto the condenser 11. The outlet of the condenser 11 is connected to the inlet of the liquid receiver, and the cooling medium does not flow through the liquid receiver. The cooling medium in the third cooling medium pipeline 23 can further reduce the temperature of the refrigerant at the outlet of the integrated liquid receiver, allowing the refrigerant to be in a lower enthalpy state, thereby achieving a higher cooling capacity per unit refrigerant, thus improving the coefficient of performance (COP) of the refrigeration system and reducing energy consumption.

[0038] This embodiment also provides an air conditioning system to achieve a higher cooling capacity per unit refrigerant, thereby improving the coefficient of performance (COP) of the air conditioning system and reducing energy consumption.

[0039] Specifically, an air conditioning system includes a compressor 3 and the aforementioned subcooling device. The compressor 3 has an exhaust port and an intake port. The exhaust port of the compressor 3 is connected to the inlet of the condenser 11, and the outlet of the first subcooler 12 is connected to the intake port of the compressor 3. The cooling medium is divided into two parts at the outlet of the first cooling medium pipe 21. One part enters the condenser 11 through the second cooling medium pipe 22 to absorb heat from the refrigerant, and the other part passes through the third cooling medium pipe 23 and the first subcooler 12 to further reduce the temperature of the refrigerant at the outlet of the condenser 11. This causes the refrigerant to be in a lower enthalpy state before throttling. Under the same flow rate of refrigerant mass, the volumetric flow rate is reduced, which reduces the specific volume of the compressor 3's intake gas and the compression work, thereby improving the coefficient of performance (COP) of the air conditioning system and achieving the effect of reducing energy consumption. In other embodiments, the subcooling device can also be applied to a gas injection enthalpy-increasing system, a hot gas square-through system, a cascade system, or a flash tank system, etc.

[0040] Furthermore, the air conditioning system also includes an evaporator 4, the inlet of which is connected to the outlet of the first subcooler 12, and the outlet of the evaporator 4 is connected to the suction port of the compressor 3. After passing through the first subcooler 12, the refrigerant liquid temperature decreases, and it can absorb more heat when evaporating in the evaporator 4, thereby further increasing the cooling capacity per unit mass of the refrigerant.

[0041] Furthermore, the air conditioning system also includes a control valve 5. The inlet of the control valve 5 is connected to the outlet of the first subcooler 12, and the outlet of the control valve 5 is connected to the inlet of the evaporator 4, thereby regulating the flow rate of refrigerant into the evaporator 4 and improving the stability of the entire air conditioning system. In this embodiment, the control valve 5 is an electronic expansion valve; in other embodiments, the control valve 5 may also be a throttling valve.

[0042] Optionally, the air conditioning system also includes a detection unit 6, which can detect the temperature and pressure of the refrigerant at the suction port. By setting the detection unit 6, the temperature and pressure of the refrigerant at the suction port of the compressor 3 are detected. Based on the pressure and temperature detected by the detection unit 6, the opening degree of the control valve 5 and the speed of the compressor 3 are controlled to achieve precise regulation. It should be noted that the above-mentioned methods for controlling the opening degree of the control valve 5 and the speed of the compressor 3 based on pressure and temperature data are existing technologies in the art and will not be described in detail here. In this embodiment, the detection unit 6 is a temperature and pressure sensor. In other embodiments, the detection unit 6 can also be a temperature sensor and a pressure sensor.

[0043] Furthermore, the number of detection units 6 is at least two, which detect the temperature and pressure of the refrigerant at multiple locations, further improving the accuracy of compressor speed control and making the entire air conditioning system operate more stably. In this embodiment, the number of detection units 6 is two; in other embodiments, the number of detection units 6 can be three, four, or five, etc. It should be noted that the number and installation location of the detection units 6 can be changed according to the needs of the air conditioning system.

[0044] This embodiment provides another type of automobile to achieve a higher cooling capacity per unit mass of refrigerant in the air conditioning system, thereby improving the coefficient of performance (COP) of the air conditioning system and reducing the vehicle's energy consumption.

[0045] Specifically, an automobile includes a body and the aforementioned air conditioning system, which is installed within the body. The cooling medium is divided into two parts at the outlet of the first cooling medium pipe 21. One part enters the condenser 11 via the second cooling medium pipe 22 to absorb heat from the refrigerant, while the other part passes through the third cooling medium pipe 23 and the first subcooler 12, further reducing the temperature of the refrigerant at the outlet of the condenser 11. This causes the refrigerant to be in a lower enthalpy state before throttling, resulting in a smaller volumetric flow rate for the same refrigerant mass. This reduces the suction specific volume of the compressor 3, lowers the compression work, and thus improves the coefficient of performance (COP) of the air conditioning system, achieving the effect of reducing automobile energy consumption.

[0046] like Figure 1 As shown, when compressor 3 is working, refrigerant is discharged from the exhaust port of compressor 3 and enters condenser 11. In condenser 11, refrigerant exchanges heat with coolant. After heat exchange, refrigerant flows out of condenser 11. The gas-liquid mixture of refrigerant enters evaporator 4 through control valve 5. Inside evaporator 4, refrigerant exchanges heat with coolant. After heat exchange, gaseous refrigerant flows out of evaporator 4 and enters compressor 3. Compressor 3 works, compressing low-pressure gaseous refrigerant into high-pressure gaseous refrigerant, which is then discharged from the exhaust port, thus completing one working cycle. At the same time, cooling medium flows out from the outlet of first cooling medium pipe 21 and splits into two paths. One path flows into condenser 11 through second cooling medium pipe 22. Inside condenser 11, cooling medium cools the heated refrigerant. The other path flows into first subcooler 12 through third cooling medium pipe 23. At the outlet of condenser 11, cooling medium cools the refrigerant again. The two cooled cooling medium paths converge at the inlet of fourth cooling medium pipe 24, thus achieving subcooling.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A subcooling device, characterized in that, include: A condenser structure in which refrigerant can flow is provided. The condenser structure includes a condenser (11) and a first subcooler (12). The outlet of the condenser (11) is connected to the inlet of the first subcooler (12). A cooling medium circulation structure is provided, in which the cooling medium can circulate. The cooling medium circulation structure includes a first cooling medium pipe (21), a second cooling medium pipe (22), a third cooling medium pipe (23), and a fourth cooling medium pipe (24). The inlet of the second cooling medium pipe (22) and the inlet of the third cooling medium pipe (23) are both connected to the outlet of the first cooling medium pipe (21). The outlet of the second cooling medium pipe (22) and the outlet of the third cooling medium pipe (23) are both connected to the inlet of the fourth cooling medium pipe (24). The second cooling medium pipe (22) flows through the condenser (11), and the third cooling medium pipe (23) flows through the first subcooler (12).

2. The subcooling device according to claim 1, characterized in that, The cooling medium is water or air.

3. The subcooling device according to claim 1, characterized in that, The flow direction of the cooling medium in the third cooling medium pipe (23) is opposite to the flow direction of the refrigerant in the first subcooler (12); And / or, the flow direction of the cooling medium in the second cooling medium conduit (22) is opposite to the flow direction of the refrigerant in the condenser (11).

4. The subcooling device according to claim 1, characterized in that, The subcooling device also includes an integrated liquid storage tank, which is integrated on the condenser (11). The outlet of the condenser (11) is connected to the inlet of the liquid storage tank, and the cooling medium does not flow through the liquid storage tank.

5. An air conditioning system, characterized in that, Includes a compressor (3) and a subcooling device as described in any one of claims 1-4, wherein the compressor (3) is provided with an exhaust port and an intake port, the exhaust port is connected to the inlet of the condenser (11), and the outlet of the first subcooler (12) is connected to the intake port.

6. The air conditioning system according to claim 5, characterized in that, The air conditioning system also includes an evaporator (4), the inlet of which is connected to the outlet of the first subcooler (12), and the outlet of which is connected to the air intake.

7. The air conditioning system according to claim 6, characterized in that, The air conditioning system also includes a control valve (5), the inlet of which is connected to the outlet of the first subcooler (12), and the outlet of which is connected to the inlet of the evaporator (4).

8. The air conditioning system according to claim 5, characterized in that, The air conditioning system also includes a detection unit (6), which is capable of detecting the temperature and pressure of the refrigerant at the air intake.

9. The air conditioning system according to claim 8, characterized in that, The number of the detection units (6) is at least two.

10. A car, characterized in that, The vehicle body includes the air conditioning system according to any one of claims 5-9, wherein the air conditioning system is installed inside the vehicle body.

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