Air conditioner, control strategy of the air conditioner, and air conditioning system

A control strategy of an air conditioner which comprises:

• a compressor, a first heat exchanger, a phase-change thermal-storage heat exchanger, a throttling device and a box, a temperature sensor, a human body sensor and a control module;
• one of a first end of the first heat exchanger and a first end of the phase-change thermal-storage heat exchanger being communicated with an outlet of the compressor, and a remaining one of the first end of the first heat exchanger and the first end of the phase-change thermal-storage heat exchanger being communicated with an inlet of the compressor;
• the phase-change thermal-storage heat exchanger comprising a first sensor adapted to detect one-phase content of a phase change medium;
• the throttling device being provided between a second end of the first heat exchanger and a second end of the phase-change thermal-storage heat exchanger;
• the box comprising an air supply port and an air return port;
• the compressor, the first heat exchanger, the phase-change thermal-storage heat exchanger and the throttling device being mounted in the box;
• the first sensor, the temperature sensor, the human body sensor and the compressor being electrically connected to the control module, the temperature sensor being adapted to detect ambient temperature;
• the control strategy of the air conditioner comprising following steps:
• S1, determining whether the air conditioner is running;
• S21, if the air conditioner is running, determining whether there are any people around the air conditioner;
• S31a, if there are no people around the air conditioner, determining whether a time without people around exceeds a predetermined time;
• S41a, if the time without people around exceeds the predetermined time, determining whether the ambient temperature reaches a set value;
• S51a, if the ambient temperature reaches the set value, turning off the air conditioner, detecting the one-phase content of the phase change medium of the phase-change thermal-storage heat exchanger, and determining whether the one-phase content of the phase change medium is less than a first predetermined volume;
• and
• S61a, if the one-phase content of the phase change medium is less than the first predetermined volume, starting a regeneration cycle of the air conditioner;
• and when the one-phase content of the phase change medium is greater than a second predetermined volume, turning off the regeneration cycle of the air conditioner.

An air conditioning system comprising:

• a reversing unit comprising a first port, a second port, a third port and a fourth port;
• a compressor comprising an inlet being communicated with the third port and an outlet being communicated with the first port;
• a first heat exchanger, the first heat exchanger comprising a first end and a second end, the first end of the first heat exchanger being communicated with the second port;
• a second heat exchanger and a water tank, the second heat exchanger comprising a third end and a fourth end, the third end of the second heat exchanger being communicated with the second port, and water in the water tank being adapted for heat exchange with the second heat exchanger;
• a phase-change thermal-storage heat exchanger;
• wherein the phase-change thermal-storage heat exchanger comprises a fifth end and a sixth end, the fifth end of the phase-change thermal-storage heat exchanger is communicated with the fourth port and the sixth end of the phase-change thermal-storage heat exchanger is communicated with the second end of the first heat exchanger by a first throttling element, and the sixth end of the phase-change thermal-storage heat exchanger is communicated with the fourth end of the second heat exchanger by a second throttling element;
• wherein
• when the air conditioning system is operating under a cooling mode, the first port is communicated with the fourth port;
• the third port is communicated with the second port;
• and the fourth port, the phase-change thermal-storage heat exchanger, the first throttling element, the first heat exchanger and the second port are sequentially communicated;
• when the air conditioning system is operating a first reheat cycle, the first port is communicated with the second port;
• the third port is communicated with the fourth port;
• the second port, the second heat exchanger, the second throttling element, the phase-change thermal-storage heat exchanger and the fourth port are sequentially communicated;
• and the water in the water tank exchanges heat with the second heat exchanger so as to be heated.