Air source heat pump system

Abstract

The utility model relates to the technical field of heat pumps, and discloses an air source heat pump system which comprises an evaporator, a magnetic suspension refrigeration compressor, a condenser, a first expansion valve and a four-way reversing valve. The magnetic suspension refrigeration compressor is used for compressing a refrigerant in a low-temperature and low-pressure gas state into a high-temperature and high-pressure gas state; the condenser is used for enabling a high-temperature and high-pressure gaseous refrigerant to become a low-temperature and high-pressure liquid refrigerant through condensation heat release; the first expansion valve is used for enabling the low-temperature high-pressure liquid refrigerant to become a low-temperature low-pressure liquid refrigerant through depressurization expansion. According to the air source heat pump system, the magnetic suspension refrigeration compressor is adopted, heat is absorbed from the low-temperature heat source and transferred to the high-temperature heat source by consuming a small amount of electric energy, and therefore the refrigeration or heating effect is achieved, and due to the fact that the magnetic suspension refrigeration compressor adopts the magnetic suspension bearing technology, the risk that the compressor is burnt out is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heat pump technology, and in particular to an air source heat pump system. Background Technology

[0002] The main components of an air source heat pump include a compressor, condenser, electronic expansion valve, and evaporator. Its working principle is that the air source heat pump drives the compressor to work through the input of electrical energy, so that the refrigerant circulates in the system. The refrigerant absorbs heat from the air in the evaporator, and is then compressed into a high-temperature and high-pressure gas in the compressor. It releases heat through the condenser, and finally expands and depressurizes through the electronic expansion valve, returning to the evaporator to continue the cycle.

[0003] One of the main drawbacks of air source heat pumps is that the compressor is prone to burnout. The compressor is the core component of an air source heat pump, equivalent to its "heart." It transfers heat by driving the circulation of refrigerant. Generally, the circulating heating system commonly used in compressors operates under high temperature and high pressure conditions. These working conditions easily lead to compressor aging and carbonization. If the system's lubrication is inadequate, the problem will be further aggravated, making the compressor more likely to burn out, thus affecting the service life of the air source heat pump. Utility Model Content

[0004] The purpose of this invention is to provide an air source heat pump system to solve the problems mentioned in the background art and reduce the risk of the air source heat pump compressor burning out.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An air source heat pump system includes an evaporator, a magnetic levitation refrigeration compressor, a condenser, a first expansion valve, and a four-way reversing valve, wherein:

[0007] The outlet of the evaporator is connected to the first inlet of the four-way reversing valve, the first outlet of the four-way reversing valve is connected to the inlet of the magnetic levitation refrigeration compressor, the outlet of the magnetic levitation refrigeration compressor is connected to the second inlet of the four-way reversing valve, the second outlet of the four-way reversing valve is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the first expansion valve, and the outlet of the first expansion valve is connected to the inlet of the evaporator, thus forming a refrigerant circulation loop.

[0008] An evaporator is used to convert a low-temperature, low-pressure liquid refrigerant into a low-temperature, low-pressure gaseous state through evaporation and heat absorption.

[0009] Magnetic levitation refrigeration compressors are used to compress low-temperature, low-pressure gaseous refrigerants into high-temperature, high-pressure gaseous states.

[0010] A condenser is used to condense a high-temperature, high-pressure gaseous refrigerant into a low-temperature, high-pressure liquid state by releasing heat.

[0011] The first expansion valve is used to allow the low-temperature, high-pressure liquid refrigerant to expand and become a low-temperature, low-pressure liquid by reducing its pressure.

[0012] As an optional solution, the air source heat pump system also includes a frequency converter, and a bypass pipeline is provided between the outlet end of the magnetic levitation refrigeration compressor and the outlet end of the condenser, with the frequency converter located on the bypass pipeline.

[0013] As an alternative, a first shut-off valve is installed on the bypass pipeline at the inlet and outlet ends of the frequency converter, a second expansion valve is installed on the bypass pipeline near the outlet end of the condenser, and a third expansion valve is installed on the bypass pipeline near the outlet end of the magnetic levitation refrigeration compressor.

[0014] As an alternative, a check valve and a manual ball valve are sequentially installed on the connecting pipe from the outlet end of the magnetic levitation refrigeration compressor to the second inlet of the four-way reversing valve, and the connection point between the bypass pipe and the refrigerant circulation loop is located between the check valve and the manual ball valve.

[0015] As an alternative, a gas-liquid separator is installed on the connecting pipe between the first outlet of the four-way reversing valve and the inlet of the magnetic levitation refrigeration compressor, and a second shut-off valve is installed at the inlet and outlet of the gas-liquid separator.

[0016] As an optional solution, pressure sensors and temperature sensors are respectively installed at the inlet and outlet ends of the magnetic levitation refrigeration compressor.

[0017] As an alternative, a dryer filter and a third shut-off valve are sequentially installed on the connecting pipe from the outlet end of the first expansion valve to the inlet end of the evaporator.

[0018] The beneficial effects of this utility model are:

[0019] This air source heat pump system uses a magnetic levitation refrigeration compressor. By consuming a small amount of electricity, it absorbs heat from a low-temperature heat source and transfers it to a high-temperature heat source, thereby achieving the effect of cooling or heating. In addition, because the magnetic levitation refrigeration compressor uses magnetic levitation bearing technology, the rotor is suspended by a magnetic field, avoiding mechanical contact and friction, reducing wear and heat generation, and preventing a series of problems such as compressor burnout, aging, and carbonization caused by system lubrication issues, thus reducing the risk of compressor burnout. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the air source heat pump system provided in this embodiment of the utility model.

[0021] In the attached image:

[0022] 1. Evaporator; 2. Magnetic levitation refrigeration compressor; 3. Condenser; 4. First expansion valve; 5. Four-way reversing valve; 6. Frequency converter; 7. Bypass pipeline; 8. First shut-off valve; 9. Second expansion valve; 10. Third expansion valve; 11. Check valve; 12. Manual ball valve; 13. Gas-liquid separator; 14. Second shut-off valve; 15. Pressure sensor; 16. Temperature sensor; 17. Dryer filter; 18. Third shut-off valve. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0027] Furthermore, the terms "first" and "second" are merely used to distinguish between different terms in description and do not have any special meaning.

[0028] Please see Figure 1As shown, this embodiment provides an air source heat pump system, including an evaporator 1, a magnetic levitation refrigeration compressor 2, a condenser 3, a first expansion valve 4, and a four-way reversing valve 5, wherein:

[0029] The outlet of evaporator 1 is connected to the first inlet of four-way reversing valve 5, the first outlet of four-way reversing valve 5 is connected to the inlet of magnetic levitation refrigeration compressor 2, the outlet of magnetic levitation refrigeration compressor 2 is connected to the second inlet of four-way reversing valve 5, the second outlet of four-way reversing valve 5 is connected to the inlet of condenser 3, the outlet of condenser 3 is connected to the inlet of first expansion valve 4, and the outlet of first expansion valve 4 is connected to the inlet of evaporator 1, thus forming a refrigerant circulation loop.

[0030] Evaporator 1 is used to convert low-temperature, low-pressure liquid refrigerant into low-temperature, low-pressure gaseous state through evaporation and heat absorption.

[0031] The magnetic levitation refrigeration compressor 2 is used to compress a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous state.

[0032] Condenser 3 is used to convert high-temperature, high-pressure gaseous refrigerant into low-temperature, high-pressure liquid state through condensation and heat release;

[0033] The first expansion valve 4 is used to cause the low-temperature, high-pressure liquid refrigerant to expand and become a low-temperature, low-pressure liquid through pressure reduction.

[0034] Therefore, a magnetic levitation refrigeration compressor 2 is adopted, which absorbs heat from a low-temperature heat source and transfers it to a high-temperature heat source by consuming a small amount of electrical energy, thereby achieving the effect of cooling or heating. Furthermore, because the magnetic levitation refrigeration compressor 2 uses magnetic levitation bearing technology, the rotor is suspended by a magnetic field, avoiding mechanical contact and friction, reducing wear and heat generation, and eliminating problems such as compressor burnout, aging, and carbonization caused by system lubrication issues, thus reducing the risk of burnout. Moreover, the magnetic levitation refrigeration compressor 2 has a built-in frequency converter function, which can automatically adjust the speed, effectively solving the major drawback of conventional air source heat pump compressors being prone to burnout.

[0035] The specific principle of this refrigerant circulation loop is as follows:

[0036] When passing through evaporator 1, the low-temperature, low-pressure liquid refrigerant absorbs heat from the air and evaporates into a gaseous state. This process lowers the air temperature, but the refrigerant absorbs heat, becoming a low-temperature, low-pressure gaseous refrigerant. This low-temperature, low-pressure gaseous refrigerant then passes through magnetic levitation compressor 2. Magnetic levitation compressor 2 consumes a small amount of electrical energy to compress the low-temperature, low-pressure gaseous refrigerant, transforming it into a high-temperature, high-pressure gaseous refrigerant. Because the pressure increases, the boiling point of the refrigerant also increases. Since the boiling point is higher than the ambient temperature, the high-temperature, high-pressure gaseous refrigerant condenses and releases heat in condenser 3, cooling into a liquid state, becoming a low-temperature, high-pressure liquid refrigerant. This process absorbs heat... Heat is transferred to the water that needs to be heated; the low-temperature, high-pressure liquid refrigerant expands and depressurizes through the first expansion valve 4. The first expansion valve 4 has a narrow channel inside, and the low-temperature, high-pressure liquid refrigerant will quickly become a low-temperature, low-pressure liquid refrigerant after passing through the first expansion valve 4. Due to the pressure reduction, the boiling point of the refrigerant will also decrease. At this time, the boiling point of the refrigerant is lower than the ambient temperature, so it can evaporate and absorb heat in the evaporator 1, thus starting the next cycle; the evaporator 1 continuously absorbs heat from the low-temperature environment, and the condenser 3 continuously releases heat to the high-temperature environment. Then, through the circulation of the refrigerant, the heat is carried to the high-temperature environment for condensation and heat release. This realizes the process of pumping heat from the low-temperature heat source to the high-temperature heat source.

[0037] Optionally, the air source heat pump system also includes a frequency converter 6, and a bypass pipe 7 is provided between the outlet end of the magnetic levitation refrigeration compressor 2 and the outlet end of the condenser 3, with the frequency converter 6 installed on the bypass pipe 7.

[0038] Therefore, by automatically and synchronously adjusting the operating frequency of the magnetic levitation refrigeration compressor 2 according to changes in ambient temperature using inverter 6, the heating efficiency, energy-saving effect, and equipment lifespan of the air source heat pump are improved. Specifically, inverter 6 allows the air source heat pump to increase its operating frequency when the outdoor temperature is low to enhance heating capacity, and decrease its operating frequency when the outdoor temperature is high to achieve energy-saving effects. This adjustment method is similar to the speed setting of an electric fan, automatically adjusting according to changes in ambient temperature to optimize the working efficiency of the air source heat pump. The addition of inverter 6 makes the air source heat pump operate more smoothly and consumes less energy.

[0039] Optionally, a first shut-off valve 8 is provided on the bypass pipe 7 at the inlet and outlet ends of the inverter 6, a second expansion valve 9 is provided on the bypass pipe 7 near the outlet end of the condenser 3, and a third expansion valve 10 is provided on the bypass pipe 7 near the outlet end of the magnetic levitation refrigeration compressor 2.

[0040] Therefore, by adjusting the opening of the first shut-off valve 8, the second expansion valve 9, and the third expansion valve 10, the refrigerant pressure and flow rate in the bypass pipeline 7 can be precisely controlled, so that the refrigerant coming out of the condenser 3 can be reheated, pressurized, and condensed to release heat, thus significantly improving the overall energy efficiency ratio.

[0041] Furthermore, a one-way valve 11 and a manual ball valve 12 are sequentially installed on the connecting pipe from the outlet end of the magnetic levitation refrigeration compressor 2 to the second inlet of the four-way reversing valve 5. The connection point between the bypass pipe 7 and the refrigerant circulation loop is located between the one-way valve 11 and the manual ball valve 12.

[0042] This ensures that the refrigerant flows in one direction into the four-way reversing valve 5, preventing backflow. The manual ball valve 12 is used for emergency control, further enhancing the stability and safety of the system.

[0043] Optionally, a gas-liquid separator 13 is provided on the connecting pipe between the first outlet of the four-way reversing valve 5 and the inlet of the magnetic levitation refrigeration compressor 2, and a second shut-off valve 14 is provided at the inlet and outlet of the gas-liquid separator 13, respectively.

[0044] Therefore, by preventing liquid refrigerant from entering the compressor through the gas-liquid separator 13, liquid slugging is avoided, ensuring the smooth operation of the magnetic levitation refrigeration compressor 2, extending its service life, and further improving the overall performance and reliability of the system.

[0045] Optionally, a pressure sensor 15 and a temperature sensor 16 are respectively installed at the inlet and outlet ends of the magnetic levitation refrigeration compressor 2.

[0046] Therefore, the operating status of the magnetic levitation refrigeration compressor 2 can be monitored in real time, and parameters can be adjusted in a timely manner to ensure the efficient and stable operation of the system.

[0047] Optionally, a dryer filter 17 and a third shut-off valve 18 are sequentially installed on the connecting pipe from the outlet end of the first expansion valve 4 to the inlet end of the evaporator 1.

[0048] Thus, impurities in the refrigerant are removed by the dryer filter 17 to ensure system cleanliness, and the third shut-off valve 18 is used to precisely control the flow rate, further optimizing the heat exchange efficiency of the evaporator 1 and improving the overall cooling effect.

[0049] The air source heat pump system employing the magnetic levitation refrigeration compressor 2 has the following advantages:

[0050] 1) It achieves heating or cooling functions by using heat from the air, without the need for additional energy consumption. It has a high efficiency in utilizing ambient temperature, and its heat exchange method makes energy utilization almost 1:3. Compared with traditional electric heaters, it reduces energy consumption by at least 50%, making it more energy-efficient than traditional heating methods.

[0051] 2) The magnetic levitation refrigeration compressor 2 adopts frequency conversion technology, which can automatically adjust the heating and cooling power according to the needs of indoor and outdoor environment, which not only improves efficiency, but also saves energy, making it a high-efficiency and energy-saving product.

[0052] 3) It does not require the use of fuels such as gas or oil, and there are no safety hazards such as gas leaks. It does not produce harmful waste gas, wastewater, or waste residue, and is harmless to human health. It fully complies with the requirements of national environmental protection policies and is a preferred product for green, environmentally friendly, zero-emission, and sustainable development.

[0053] 4) It has both cooling and heating functions, which can not only provide warm heating in the cold winter, but also provide comfortable cooling in the summer. It can also dehumidify, making it a multi-functional appliance.

[0054] 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. An air source heat pump system characterised in that, It comprises an evaporator (1), a magnetic suspension refrigeration compressor (2), a condenser (3), a first expansion valve (4) and a four-way reversing valve (5), wherein: The outlet end of the evaporator (1) is connected to the first inlet of the four-way reversing valve (5), the first outlet of the four-way reversing valve (5) is connected to the inlet end of the magnetic suspension refrigeration compressor (2), the outlet end of the magnetic suspension refrigeration compressor (2) is connected to the second inlet of the four-way reversing valve (5), the second outlet of the four-way reversing valve (5) is connected to the inlet end of the condenser (3), the outlet end of the condenser (3) is connected to the inlet end of the first expansion valve (4), and the outlet end of the first expansion valve (4) is connected to the inlet end of the evaporator (1), thereby forming a refrigerant circulation loop. The evaporator (1) is used to change low-temperature and low-pressure liquid refrigerant into low-temperature and low-pressure gas by evaporation heat absorption. The magnetic suspension refrigeration compressor (2) is used to change low-temperature and low-pressure gas into high-temperature and high-pressure gas after compression. The condenser (3) is used to change high-temperature and high-pressure gas into low-temperature and high-pressure liquid by condensation heat release. The first expansion valve (4) is used to change low-temperature and high-pressure liquid into low-temperature and low-pressure liquid by pressure reduction expansion.

2. The air source heat pump system of claim 1, wherein, It also comprises a frequency converter (6), and a bypass pipeline (7) is arranged between the outlet end of the magnetic suspension refrigeration compressor (2) and the outlet end of the condenser (3), and the frequency converter (6) is arranged on the bypass pipeline (7).

3. The air source heat pump system of claim 2, wherein, A first shut-off valve (8) is arranged on the bypass pipeline (7) and located at the inlet end and the outlet end of the frequency converter (6) respectively, a second expansion valve (9) is arranged on the bypass pipeline (7) and close to the outlet end of the condenser (3), and a third expansion valve (10) is arranged on the bypass pipeline (7) and close to the outlet end of the magnetic suspension refrigeration compressor (2).

4. The air source heat pump system of claim 2, wherein, A check valve (11) and a manual ball valve (12) are arranged in sequence on the connecting pipeline from the outlet end of the magnetic suspension refrigeration compressor (2) to the second inlet of the four-way reversing valve (5), and the joint of the bypass pipeline (7) and the refrigerant circulation loop is located between the check valve (11) and the manual ball valve (12).

5. The air source heat pump system of claim 1, wherein, A gas-liquid separator (13) is arranged on the connecting pipeline from the first outlet of the four-way reversing valve (5) to the inlet end of the magnetic suspension refrigeration compressor (2), and a second shut-off valve (14) is arranged at the inlet end and the outlet end of the gas-liquid separator (13) respectively.

6. The air source heat pump system of claim 1, wherein, A pressure sensor (15) and a temperature sensor (16) are arranged at the inlet end and the outlet end of the magnetic suspension refrigeration compressor (2) respectively.

7. The air source heat pump system of claim 1, wherein, A drying filter (17) and a third shut-off valve (18) are arranged in sequence on the connecting pipeline from the outlet end of the first expansion valve (4) to the inlet end of the evaporator (1).

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