Outdoor unit's system for heat pump
Outdoor heat exchanger system to solve heat pump operation failure according to outside temperature
According to the present invention, if the frost is generated on the surface of the outdoor unit heat exchanger according to the outside air condition in the conventional heating operation, and if it continues to accumulate, the flow path of the external heat medium becomes narrow, and the heat exchange efficiency continuously decreases. In order to solve this problem, the four sides are converted to the cooling operation state to solve the problem, and the hot refrigerant gas flows to the outdoor heat exchanger to remove the frost generated on the surface of the heat exchanger so that the heating operation can be performed again. At this time, the indoor unit to be heated becomes the cooling operation state until the defrosting operation is completed, and it discharges cold wind into the room and becomes a fatal defect in the purpose of use as a heater.In addition, when the repeated defrosting operation appears, the heat exchange efficiency gradually decreases and eventually the whole The system becomes inoperable. As a solution to this problem, water contained in the air of the external heat exchange medium supplied to the outdoor heat exchanger is removed and sent to the heat exchanger to prevent frost formation or freezing, thereby maintaining a continuous evaporative heat exchanger function and enabling continuous heating operation.
The outdoor unit heat exchanger has heat dissipation fins stacked on the connection pipe, refrigerant flows into the connection pipes that make up the closed circuit, heat is transferred to the heat dissipation fins stacked on the outside of the connection pipe, and air flows between the heat dissipation fins along the air flow formed by the outdoor unit. The heat is removed and the evaporation cycle of the heating operation is performed by repetitive work. When the humidity in the air flowing between the heat sink fins drops below the dew point, sexuality is generated. Eventually, the flow path of air, which is an external heat medium, is blocked. Then, the heat exchange is not performed, and the function of the evaporative heat exchanger is lost. In the cycle, the mixed refrigerant not evaporated is introduced into the compressor without being completely gasified, and the process is repeated and the system is stopped.
The primary purpose of the present invention is to solve the loss of the function of the evaporative heat exchanger by blocking the air flow path by the generation and freezing of the frost by removing humidity in the air, which is a heat exchange medium, in the outdoor unit and entering the heat exchanger. By reducing the frequency of unavoidable defrosting operation, it is possible to reduce the decrease in indoor temperature caused by the defrosting operation. This makes it possible to perform the heating operation of the heat pump as the heating means more efficiently than before. As a method for this, the outdoor heat exchanger is divided into dehumidification and evaporative heat exchange so that air, which is an external heat medium, passes through the dehumidifying heat exchanger and flows into the evaporative heat exchanger, thereby preventing the occurrence of freezing and freezing of the evaporation heat exchanger. Provide a means to accomplish the task.
The present invention prevents defrosting operation due to freezing and freezing of outdoor heat exchanger in the existing heat pump when winter outdoor air goes down, so it is possible to continuously generate warm air in the heat pump heating operation during winter season, thus functioning as a heater. To maximize.
1 is a system configuration to be provided by the present invention and Figure 2 is a conventional heat pump system configuration.
In general, the heating operation of the heat pump will be described with reference to the drawings. The high-pressure gas refrigerant inside the cycle compressed by the compressor 1 is transferred to the indoor heat exchanger 8 through the four sides 2, and the external heat exchange medium The air is forcibly heat exchanged by the indoor air conditioner (9), and the heat is lost to the room to become a high-pressure liquid refrigerant, expanded by the outdoor unit expansion device (6), transferred to the outdoor heat exchanger (4), and changed to a low-pressure mixed refrigerant. At this time, as in the indoor unit, the cold air is exchanged with air, which is an external heat exchange medium, to be a low-pressure gas refrigerant, and the refrigerant is repeatedly recovered to form a refrigeration cycle. At this time, the moisture contained in the outdoor air becomes defrost when it passes through the outdoor heat exchanger (4) and becomes stuck on the surface of the heat radiating fin of the heat exchanger. Shutting off flows into the compressor without performing the evaporation process during the entire refrigeration cycle, which results in a decrease in calories and the compressor continuing to stop. The present invention is to maintain the components of the refrigeration cycle intact, but to remove the moisture contained in the air to heat exchange with the outside in the outdoor heat exchanger to send to the outdoor heat exchanger (4) to prevent the flow path of air, which is an external heat medium, The dehumidification heat exchanger (3) blocks the occurrence of freezing and secondaryly defrosts, which forms on the surface of the heat exchanger, and continuously dehumidifies the airflow to the outdoor heat exchanger (3) without blocking the flow path even if freezing occurs. It is designed to maintain the performance as a heater because it does not lead to frequent occurrence of defrosting operation and cycle maintenance obstacles.
1. Compressor 2. Four-sided 3. Heat exchanger for Jemeum 4. Outdoor heat exchanger 5. Expansion valve 6. Reverse valve 7. Indoor heat exchanger 8. Indoor unit 9. Outdoor unit 10. Liquid separator 11. Receiver
