Direct Expansion Heat Recovery Method and Device

Abstract

A direct expansion heat recovery method includes a complete refrigeration cycle including a compression process by a compressor, a condensing process by a condenser, a throttling process by an expansion valve, and an evaporation process by an evaporator. A heat output process of a condensing process of the condenser includes providing at least two condensers which are connected serially. A heat output required by a second condenser is to proportionally control a heat output of a first condenser, so as to precisely control the heat output required by the second condenser. A heat input process of an evaporation process of the evaporator includes providing at least two evaporators which are connected serially. A heat input required by a second evaporator is to proportionally control a heat input of a first evaporator, so as to precisely control the heat input required by the second evaporator.

1 . A direct expansion heat recovery method comprising:
 a complete refrigeration cycle including a compression process by a compressor, a condensing process by a condenser, a throttling process by an expansion valve, and an evaporation process by an evaporator;   the improvement comprising:   a heat output process of a condensing process of the condenser includes providing at least two condensers which are connected serially;   a heat output required by a second condenser is to proportionally control a heat output of a first condenser, so as to precisely control the heat output required by the second condenser; and   the second condenser functions as a heater or humidifier of heat recovery, without affecting a normal operation of the compressor.   
     
     
         2 . A direct expansion heat recovery method comprising:
 a complete refrigeration cycle including a compression process by a compressor, a condensing process by a condenser, a throttling process by an expansion valve, and an evaporation process by an evaporator;   the improvement comprising:   a heat input process of an evaporation process of the evaporator includes providing at least two evaporators which are connected serially;   a heat input required by a second evaporator is to proportionally control a heat input of a first evaporator, so as to precisely control the heat input required by the second evaporator;   the second evaporator functions as a cooler and a dehumidifier, so that when a volume of the second evaporator is smaller than that of a heater of heat recovery, there is a heating effect at a high temperature, without affecting a normal operation of the compressor.   
     
     
         3 . A constant temperature and humidity direct expansion heat recovery method comprising:
 using a high temperature refrigerant of heat recovery to heat a humidifying water in a humidifier to produce humidified air; and   introducing an external air to produce air bubbles in the humidifying water in the humidifier, to increase a contact area of the air and the humidifying water, so as to enhance a humidifying quantity, and to achieve the heat recovery.   
     
     
         4 . A direct expansion heat recovery device comprising:
 a compressor, a condenser, an expansion valve, and an evaporator which are connected to construct a complete refrigeration cycle;   the improvement comprising:   the condenser includes a first condenser and a second condenser which are connected serially;   controlling a heat output required by the second condenser is to proportionally control a heat output of the first condenser, so as to precisely control the heat output required by the second condenser; and   the second condenser functions as a heater of heat recovery, without affecting a normal operation of the compressor.   
     
     
         5 . The direct expansion heat recovery device of  claim 4 , wherein:
 the evaporator includes a first evaporator and a second evaporator which are connected serially;   a heat input required by the second evaporator is to proportionally control a heat input of the first evaporator, so as to precisely control the heat input required by the second evaporator;   the second evaporator functions as a cooler and a dehumidifier, so that when a volume of the second evaporator is smaller than that of a heater of the heat recovery, there is a heating effect at a high temperature, without affecting a normal operation of the compressor.   
     
     
         6 . The direct expansion heat recovery device of  claim 4 , wherein:
 the condenser further includes a third condenser and a fourth condenser which are connected serially;   the serially connected third condenser and fourth condenser are connected in parallel with the serially connected first condenser and second condenser; and   the direct expansion heat recovery device further comprises solenoid valves to control and start heating or humidifying functions of the heat recovery.   
     
     
         7 . The direct expansion heat recovery device of  claim 6 , wherein the fourth condenser is a humidifier. 
     
     
         8 . The direct expansion heat recovery device of  claim 7 , wherein:
 the humidifier includes humidifying water, an external water source control unit, a high temperature refrigerant pipe, a compression air pipe, and an air compressor;   the external water source control unit is used to control a water level of the humidifying water;   the high temperature refrigerant pipe has a first end connected with the third condenser and a second end connected with the expansion valve, so that a heat recovery of the high temperature refrigerant supplied by the third condenser is used to heat the humidifying water to produce humidified air; and   the compression air pipe is connected with the air compressor and uses a compressed air to produce air bubbles, to increase a contact area of the compressed air and the humidifying water, so as to enhance a humidifying quantity.   
     
     
         9 . The direct expansion heat recovery device of  claim 6 , further comprising a second compressor connected in parallel with the compressor. 
     
     
         10 . The direct expansion heat recovery device of  claim 5 , wherein:
 the condenser further includes a third condenser and a fourth condenser which are connected serially;   the serially connected third condenser and fourth condenser are connected in parallel with the serially connected first condenser and second condenser; and   the direct expansion heat recovery device further comprises solenoid valves to control and start heating or humidifying functions of the heat recovery.