Adaptive temperature control system for cooling working fluid

Abstract

An adaptive temperature control system for cooling a working fluid at a target temperature includes a cooling device and a controller. The cooling device includes a compressor having a motor, a condenser having a fan, an expander, an evaporator, a coolant, and an inverter electrically connected with the motor of the compressor. The coolant in the evaporator is functioned to thermally exchange with the working fluid, thereby cooling the working fluid passing by the evaporator. The controller controls the rotary speeds of the motor and the fan according to a plurality of system parameters, optionally including the target temperature, a temperature in the evaporator, a mass flow of the working fluid, inlet and outlet pressures of compressor, and a temperature of the working fluid obtained at a sense position where the working fluid has passed by the evaporator.

What is claimed is: 
     
         1 . An adaptive temperature control system for cooling a working fluid, which flows in a pipe, at a target temperature, the adaptive temperature control system comprising:
 a cooling device having a compressor, a condenser, an expander, an evaporator, a coolant passing through the compressor, the condenser, the expander and the evaporator, and an inverter, wherein the compressor has a motor; the condenser has a fan for dissipating heat of the coolant; the motor is electrically connected with the inverter; the coolant in the evaporator is functioned to thermally exchange with the working fluid, thereby cooling the working fluid; and   a controller having a plurality of input ports for receiving a plurality of system parameters respectively, and a first output port electrically connected to the inverter for enabling the controller to transmit a signal for controlling a rotary speed of the motor of the compressor to the inverter according to the system parameters;   wherein the system parameters comprise the target temperature, a temperature in the evaporator, a mass flow of the working fluid in the pipe, an inlet pressure of the compressor, and an outlet pressure of compressor.   
     
     
         2 . The adaptive temperature control system as claimed in  claim 1 , wherein the controller comprises a second output port electrically connected to the fan of the condenser for enabling the controller to transmit a signal for controlling a rotary speed of the fan of the condenser according to the system parameters. 
     
     
         3 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise a temperature of the working fluid obtained after the working fluid has passed by the evaporator in the pipe. 
     
     
         4 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise a compressor inlet temperature of the coolant. 
     
     
         5 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise a compressor outlet temperature of the coolant. 
     
     
         6 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise a current of the motor of the compressor. 
     
     
         7 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise an inlet temperature of working fluid. 
     
     
         8 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise a condenser outlet temperature of the coolant. 
     
     
         9 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise an ambient environment temperature. 
     
     
         10 . The adaptive temperature control system as claimed in  claim 1 , wherein the system parameters further comprise an ambient environment humidity. 
     
     
         11 . The adaptive temperature control system as claimed in  claim 1 , further comprises a power factor corrector for being electrically connected with a power source and the inverter which is electrically connected with the motor of the compressor. 
     
     
         12 . The adaptive temperature control system as claimed in  claim 1 , wherein the cooling device further comprises at least one additional condenser; after flowing out from the compressor, the coolant flows through the condenser, the at least one additional condenser and the expander, and then flows into the evaporator; after flowing out from the evaporator, the coolant flows back to the at least one additional condenser, and then flows back to the compressor. 
     
     
         13 . The adaptive temperature control system as claimed in  claim 12 , wherein the at least one additional condenser comprises a first additional condenser and a second additional condenser; the cooling device further comprises a phase separator and an additional expander; after flowing out from the compressor, the coolant flows through the condenser, the first additional condenser and the phase separator; after flowing out from the phase separator, a part of the coolant flows through the additional expander and then flows backwards to the second additional condenser, and the other part of the coolant flows through the second additional condenser, the expander and the evaporator; after flowing out from the evaporator, the coolant flows hack to the second additional condenser and the first additional condenser, and then flows back to the compressor. 
     
     
         14 . The adaptive temperature control system as claimed in  claim 12 , wherein the working fluid flowing in the pipe passes by the at least one additional condenser before passing by the evaporator. 
     
     
         15 . An adaptive temperature control system for cooling a working fluid, which flows in a pipe, at a target temperature set by a user, the adaptive temperature control system comprising:
 a cooling device having a compressor, a condenser, at least one additional condenser, an expander, an evaporator, a coolant passing through the compressor, the condenser, the at least one additional condenser, the expander and the evaporator, and an inverter, wherein the compressor has a motor; the condenser has a fan for dissipating heat of the coolant; the motor is electrically connected with the inverter; the coolant in the evaporator and the at least one additional condenser is functioned to thermally exchange with the working fluid, thereby cooling the working fluid; and   a controller having a plurality of input ports and a first output port electrically connected to the inverter for enabling the controller to transmit a signal for controlling a rotary speed of the motor of the compressor to the inverter.   
     
     
         16 . The adaptive temperature control system as claimed in  claim 15 , wherein the at least one additional condenser has first and second circuits, through which the coolant passes cyclically; the coolant in the first circuit and the second circuit is functioned to thermally exchange with the working fluid simultaneously. 
     
     
         17 . The adaptive temperature control system as claimed in  claim 15 , wherein the at least one additional condenser has a first circuit and a second circuit; the coolant flows into the expander through the first circuit; the coolant flows into the compressor through the second circuit. 
     
     
         18 . The adaptive temperature control system as claimed in  claim 15 , wherein the at least one additional condenser comprises a first additional condenser and a second additional condenser; the cooling device further comprises a phase separator and an additional expander; after flowing out from the compressor, the coolant flows through the condenser, the first additional condenser and the phase separator; after flowing out from the phase separator, a part of the coolant flows through the additional expander and then flows backwards to the second additional condenser, and the other part of the coolant flows through the second additional condenser, the expander and the evaporator; after flowing out from the evaporator, the other part of the coolant flows back to the second additional condenser and the first additional condenser, and then flows back to the compressor. 
     
     
         19 . The adaptive temperature control system as claimed in  claim 18 , wherein the second additional condenser has a first circuit and a second circuit; after flowing out from the phase separator, the part of the coolant without flowing through the additional expander flows into the expander through the first circuit of the second additional condenser, and the part of the coolant flowing through the additional expander flows back to the compressor through the second circuit of the second additional condenser after flowing through the additional expander. 
     
     
         20 . The adaptive temperature control system as claimed in  claim 15 , wherein the input ports of the controller receive a plurality of system parameters respectively, and the controller transmits the signal for controlling the rotary speed of the motor of the compressor through the first output port to the inverter according to the system parameters; the system parameters comprise the target temperature, and a temperature in the evaporator. 
     
     
         21 . The adaptive temperature control system as claimed in  claim 20 , wherein the system parameters further comprise a mass flow of the working fluid in the pipe, inlet and outlet pressures of the compressor, or a temperature of the working fluid obtained after the working fluid has passed by the evaporator in the pipe. 
     
     
         22 . An adaptive temperature control system for cooling a working fluid at a target temperature, the adaptive temperature control system comprising:
 a cooling device for cooling the working fluid, which comprises an evaporator, a compressor having a motor, and an inverter for controlling a rotary speed of the motor according to the target temperature and a temperature in the evaporator; and   a power factor corrector electrically connected with the inverter for receiving AC power and outputting DC power to the inverter.