| 摘要 |
<p>The present invention relates to a heat pump capable of delaying frosting and a binary cycle system having the same, which are capable of reducing the frosting generated on an evaporator by a temperature difference between the evaporator and outdoor air in the case of the operation of the heat pump, thereby maximizing heating efficiency. According to the present invention, provided is a heat pump capable of delaying frosting, which comprises: a heat exchanger communicating with a heating flow path; a compressor compressing a refrigerant, and supplying the compressed refrigerant to the heat exchanger through a first heating flow path; an evaporator allowing outdoor air to exchange heat with the refrigerant which flows into the evaporator after the refrigerant exchanges heat in the heat exchanger and is expanded in an expansion valve through a second heating flow path; a frosting delay flow path allowing the part of the high-temperature and high-pressure refrigerant discharged from the compressor to flow into the evaporator; and a delay valve opening or closing the frosting delay flow path, wherein the delay valve closes the frosting delay flow path in a first condition in which a difference (t-g-t-o) between a refrigerant temperature (tg) and an outdoor air temperature (to) is higher than a first predetermined temperature (tf1), and opens the frosting delay flow path in a second condition in which the difference (t_g-t_o) between the refrigerant temperature (t_g) and the outdoor air temperature (t_o) is lower than the first predetermined temperature (t_f1), so the part of the high-temperature and high-pressure refrigerant discharged from the compressor can flow into the evaporator, thereby delaying the frosting on the evaporator. Therefore, in the case of the operation of the heat pump, freezing can be prevented or delayed, thereby maximizing heating efficiency.</p> |
