Heat pump unit and frequency conversion module cooling control method thereof

The invention discloses a heat pump unit and a frequency conversion module cooling control method thereof. The heat pump unit is provided with a first throttling valve, the two ends of the first throttling valve are connected with a branch in parallel, and the branch is sequentially provided with a heat dissipation component used for cooling the frequency conversion module and a second throttling valve. And when the unit refrigerates, a refrigerant condensed by an outdoor heat exchanger of the heat pump unit is used for dissipating heat of the frequency conversion module. According to the invention, the problem of condensation during cooling of the frequency conversion module is well solved. 本发明公开了一种热泵机组及其变频模块冷却控制方法。所述热泵机组设有第一节流阀，其两端并联一支路，该支路上依次设有用于变频模块冷却的散热部件和第二节流阀，当机组制热时利用热泵机组的室外换热器风机对变频模块进行散热，当机组制冷时利用热泵机组的室外换热器冷凝后的冷媒对变频模块进行散热。本发明很好地解决了变频模块冷却时的凝露问题。