TWI630361B - Adaptive temperature control system for cooling working fluid - Google Patents

Abstract

An adaptive temperature control system for cooling a working fluid to a target temperature set by a user, the system comprising a compressor, a condenser, an expander (eg, a capillary), an evaporator, and a coolant cooling device and a controller, the motor of the compressor is electrically connected to a frequency converter, the condenser has a fan for assisting heat dissipation of the coolant, and the working fluid is cooled by heat exchange with the coolant in the evaporator, and the controller Receiving a plurality of system parameters and controlling the rotational speed of the compressor motor and the condenser fan, the system parameters optionally including a target temperature, an internal temperature of the evaporator, a flow rate of the working fluid, an inlet and outlet pressure of the compressor, and a work The temperature at which the fluid flows through the evaporator.

Description

Adaptive temperature control system for cooling working fluid

The present invention relates to temperature control systems, and more particularly to an adaptive temperature control system for cooling a working fluid.

When an electronic component or an electronic device thereof (for example, a wafer, an integrated circuit, a printed circuit, or the like) is tested, the withstand temperature of the test object is usually a very important test item, that is, the test object needs to be detected at a certain Whether it works properly in a specific temperature range. It is conceivable that in the aforementioned detection process, a temperature control system is required to accurately control the temperature of the object to be tested to the set temperature as much as possible.

A temperature control system is conventionally controlled by a temperature-adjustable probe directly contacting the object to be tested on the test socket. However, since the object to be tested has only one side (usually the top surface), it is subjected to the probe. Contact, this temperature control system is easy to make the temperature of the object to be tested uneven.

Another temperature control system that is conventionally provides a temperature-adjustable airflow that directs the airflow to the surroundings of the object to be tested and changes its temperature. Such a temperature control system tends to make the temperature of the object to be tested uniform and can be A temperature sensor disposed adjacent to the object to be tested senses the temperature of the airflow, thereby controlling the temperature of the airflow to produce a stable and good temperature control effect. However, such a temperature control system cools the working fluid by means of an alternating current cooling device and continuously supplies power to the cooling device with a power supply of 50 or 60 Hz (generally no parameters are monitored, even if there is monitoring, no change can be made) Therefore, there is often a case where the output cooling capacity is greater than the required cooling capacity, resulting in waste of energy. For example, the system can output -60 degrees of working fluid at 60 Hz. When the operating temperature is only -20 degrees, only one heater can be used to raise the temperature. This is a very powerful practice.

The main object of the present invention is to provide a method for cooling a working fluid (gas Or liquid) adaptive temperature control system capable of accurately cooling the working fluid to a target temperature to accurately and uniformly control the temperature of the analyte by the working fluid, or for other work requiring accurate temperature A program or system of fluids.

To achieve the above object, an adaptive temperature control system for cooling a working fluid provided by the present invention is for cooling a working fluid in a fluid line to a target temperature set by a user; the adaptive temperature control system A cooling device is included, as well as a controller. The cooling device comprises a compressor, a condenser, an expander (such as a capillary), an evaporator, a refrigerant circulating in sequence through the compressor, the condenser, the expander and the evaporator, and a frequency converter having a motor having a fan for assisting heat dissipation of the coolant, the motor being electrically connected to the frequency converter, the working flow system performing heat exchange with the coolant in the evaporator And cooling. The controller has a plurality of input ports for receiving a plurality of system parameters, and a first output port electrically connected to the frequency converter, and the controller sends the first output port according to the system parameters to control the The signal of the compressor motor speed; wherein the system parameters may include the target temperature, the internal temperature of the evaporator, the flow rate of the working fluid in the fluid line, and the inlet pressure and the outlet pressure of the compressor.

Preferably, the controller may have a second output port electrically connected to the fan of the condenser, and the controller sends a signal for controlling the fan speed of the condenser from the second output port according to the system parameters. .

With the system parameters, the controller can adjust the motor speed of the compressor and the fan speed of the condenser according to the current state of the adaptive temperature control system, thereby accurately cooling the working fluid to the target temperature. Therefore, the working fluid can be guided to a test object and can be used to accurately and uniformly control the temperature of the object to be tested. Alternatively, the adaptive temperature control system can be applied to other programs or systems that require a working fluid at an accurate temperature. In this way, the invention can improve the stability of the working fluid temperature of the cooling device, improve the energy use efficiency, avoid waste of energy, reach the required temperature in a shorter time, protect the compressor to avoid the temperature and pressure exceeding the safe operation. The range, as well as stable operation over a wide range of input AC voltages and frequencies.

Preferably, the system parameters further comprise a temperature of the working fluid flowing through the evaporator within the fluid line.

Preferably, the system parameters further include the coolant at the compressor inlet The temperature.

Preferably, the system parameters further comprise the temperature of the coolant at the compressor outlet.

Preferably, the system parameters further comprise the current of the motor of the compressor.

Preferably, the system parameters further comprise a temperature at which the working fluid is delivered to the cooling device.

Preferably, the system parameters further comprise the temperature of the coolant at the outlet of the condenser.

Preferably, the system parameters further include ambient temperature.

Preferably, the system parameters further include ambient humidity.

Preferably, the adaptive temperature control system further includes a power factor corrector for electrically connecting to a power source and electrically connected to the frequency converter electrically connected to the compressor motor.

Preferably, the cooling device further comprises at least one additional condenser, wherein the coolant flowing out of the compressor flows through the condenser, the at least one additional condenser and the expander and then flows into the evaporator. The coolant exiting the evaporator is first refluxed to the at least one additional condenser and back to the compressor.

Preferably, the at least one additional condenser comprises a first additional condenser and a second additional condenser, the cooling device further comprising a phase separator and an additional expander, the coolant flowing out of the compressor First flowing through the condenser, the first additional condenser and the phase separator, and then a portion of the coolant flows through the additional expander, and then flows back to the second additional condenser, and another portion flows through the second An additional condenser, the expander and the evaporator, the coolant flowing out of the evaporator is first returned to the second additional condenser and the first additional condenser is returned to the compressor.

Preferably, the working fluid flows through the at least one additional condenser and then through the evaporator in the fluid line.

To achieve the above object, the present invention provides another adaptive temperature control system for cooling a working fluid, comprising a cooling device and a controller. The cooling device comprises a compressor, a condenser, at least one additional condenser, an expander, an evaporator, a sequential circulation through the compressor, the condenser, the at least one additional condenser, the expander And the evaporation a coolant, and a frequency converter, the compressor having a motor having a fan for assisting heat dissipation of the coolant, the motor being electrically connected to the inverter, the workflow system and the evaporator and the The coolant in at least one of the additional condensers is cooled by heat exchange. The controller (30) has a plurality of input ports and a first output port electrically connected to the frequency converter for sending a signal for controlling the speed of the motor of the compressor.

Preferably, the at least one additional condenser has a first pipeline and a second pipeline for circulating the coolant in the first pipeline and the second pipeline, and the workflow system simultaneously The coolant in the first line and the second line is heat exchanged.

Preferably, the at least one additional condenser has a first conduit and a second conduit, and the coolant flows into the expander via the first conduit, and the coolant flows into the compressor via the second conduit.

Preferably, the at least one additional condenser comprises a first additional condenser and a second additional condenser, the cooling device further comprising a phase separator and an additional expander, the coolant flowing out of the compressor First flowing through the condenser, the first additional condenser and the phase separator, and then a portion of the coolant flows through the additional expander and then back to the second additional condenser and another portion flows through the second additional condensation The expander and the evaporator, the coolant flowing out of the evaporator is first returned to the second additional condenser and the first additional condenser is returned to the compressor.

Preferably, the second additional condenser has a first conduit and a second conduit, and the portion of the coolant that flows out of the phase separator without flowing through the additional expander is via the second additional condenser. A first line flows into the expander, and a portion of the coolant flowing through the additional expander flows through a second line of the second additional condenser to be returned to the compressor.

Preferably, the plurality of input ports of the controller receive the plurality of system parameters, and the controller sends a signal for controlling the speed of the compressor motor from the first output port according to the system parameters, wherein the system parameters include the Target temperature, as well as the internal temperature of the evaporator. More preferably, the system parameters further include a flow rate of the working fluid in the fluid line, an inlet pressure and an outlet pressure of the compressor, or a temperature of the working fluid flowing through the evaporator in the fluid line. .

In addition, the present invention further provides an adaptive temperature control system including a cooling device for cooling a working fluid, and a power factor corrector, the cooling device The utility model comprises a compressor and a frequency converter. The compressor has a motor controlled by the frequency converter, and the power factor corrector is electrically connected to the frequency converter for receiving alternating current and outputting direct current to the frequency converter.

Detailed construction, features, assembly or use of the adaptive temperature control system for cooling a working fluid provided by the present invention will be described in the detailed description of the subsequent embodiments. However, it should be understood by those of ordinary skill in the art that the present invention is not limited by the scope of the invention. Other embodiments (including embodiments that do not provide all of the advantages and features mentioned herein) are also within the scope of the invention.

10‧‧‧Adaptable temperature control system

20, 20', 20" ‧‧‧ cooling device

21‧‧‧Compressor

212‧‧‧Motor

22‧‧‧Condenser

222‧‧‧Fan

23‧‧‧Expander

24‧‧‧Evaporator

25, 25A, 25B‧‧‧ coolant

26, 27‧‧‧Inverter

30‧‧‧ Controller

31‧‧‧First output埠

32‧‧‧Second output埠

33‧‧‧ Input埠

40‧‧‧Power factor corrector

50‧‧‧Power supply

60‧‧‧Working fluid

70‧‧‧ fluid lines

72‧‧‧Sensing position

80‧‧‧Test objects

91‧‧‧Additional condenser

911‧‧‧First line

912‧‧‧Second line

92‧‧‧First additional condenser

93‧‧‧ phase separator

94‧‧‧Additional expander

95‧‧‧Second additional condenser

951‧‧‧First line

952‧‧‧Second line

1 is a system block diagram of an adaptive temperature control system for cooling a working fluid according to a first preferred embodiment of the present invention; FIG. 2 is a view of the first preferred embodiment of the present invention; Schematic diagram of a cooling device, a working fluid, a fluid line and a test object for cooling an adaptive temperature control system of a working fluid; FIG. 3 is a cooling work provided by a second preferred embodiment of the present invention Schematic diagram of a cooling device, a working fluid and a fluid line of a fluid adaptive temperature control system; and FIG. 4 is an adaptive temperature control for cooling a working fluid according to a third preferred embodiment of the present invention A schematic diagram of a cooling device, a working fluid, and a fluid line of the system.

Referring to Figures 1 and 2, an adaptive temperature control system 10 for cooling a working fluid according to a first preferred embodiment of the present invention mainly includes a cooling device 20, and a controller 30. The adaptive temperature control system 10 can include, but is not limited to, a power factor corrector (PFC), by which the power factor corrector 40, The cooling device 20 is electrically connected to a power source 50.

The adaptive temperature control system 10 is configured to cool a working fluid 60 (which may be a gas or a liquid) in a fluid line 70 to be guided to a test object 80 to a target temperature set by a user, in other words. The working fluid 60 is cooled by the adaptive temperature control system 10 to adjust the temperature of the analyte 80. However, the adaptive temperature control system of the present invention is not limited to cooling the object to be tested, but can be applied to other programs or systems that require a working fluid of an accurate temperature.

The cooling device 20 is similar to the basic principle of the conventional refrigerating and air-conditioning system, and mainly includes a compressor 21, a condenser 22, an expander 23, an evaporator 24, and a sequential circulation flow through the compressor 21. The condenser 22, the expander 23 and the coolant 25 of the evaporator 24, and the two frequency converters 26, 27. The coolant 25 may be any commercially available coolant depending on the use requirements, or a mixture of two types of coolants available on the market.

The compressor 21 has a motor 212 electrically connected to the frequency converter 26, and the frequency converter 26 can control the rotation speed of the motor 212. In this embodiment, the frequency converter 26 is electrically connected to the power source 50 through the power factor corrector 40. The power factor corrector 40 can adopt a commercially available integrated circuit with a power factor correction function. The corrector 40 can receive alternating current having a large voltage range and can operate over a large frequency range and can output a fixed voltage direct current. The power source 50 can be a commercial power source in a major use area of the world. The power factor corrector 40 can receive the alternating current provided by the power source 50 and output direct current to the frequency converter 26 to drive the motor 212.

The compressor 21 compresses the low-temperature low-pressure gaseous refrigerant 25 into a high-temperature high-pressure gaseous refrigerant 25 by the motor 212, and supplies power to circulate the coolant 25. The condenser 22 uses a cooling medium (usually air) to dissipate the high-temperature and high-pressure gaseous coolant 25 to be cooled to a medium-temperature high-pressure liquid coolant 25, and the condenser 22 has a fan 222 that helps the coolant 25 to dissipate heat. . The expander 23 (for example, a capillary tube) is used to depressurize the medium-temperature high-pressure liquid coolant 25 into a medium-temperature low-pressure liquid coolant 25 so that the coolant 25 can absorb heat and evaporate as it flows through the evaporator 24. Low temperature and low pressure gaseous coolant 25. The working fluid 60 is cooled by heat exchange with the coolant 25 in the evaporator 24 as it flows through the evaporator 24 in the fluid line 70.

The controller 30 has a first output port 31, a second output port 32, and a plurality of input ports 33. The first output port 31 is electrically connected to the frequency converter 26, and the second output is The 埠32 is electrically connected to the inverter 27, and the input 埠33 is respectively configured to receive a plurality of system parameters, and the controller 30 sends the first output 埠31 according to the system parameters to control the rotation of the motor 212. The signal is sent by the second output port 32 to control the speed of the fan 222. The cooling device 20 may not be provided with the inverter 27 as long as the fan 222 is a fan having a plurality of stages of rotation speed. It is worth mentioning that the controller 30 can be disposed in the frequency converter 26 and/or the frequency converter 27.

The system parameters may optionally include the target temperature set by the user, the internal temperature of the evaporator 24, the flow rate of the working fluid 60 in the fluid line 70, and the inlet pressure and outlet of the compressor 21. pressure. The number of system parameters employed by the adaptive temperature control system 10 depends on the actual usage requirements of the system 10, and may be more or less than the system parameters described above, and is not limited to the aforementioned system parameters. With the system parameters, the controller 30 can adjust the rotational speed of the motor 212 of the compressor 21 and the rotational speed of the fan 222 of the condenser 22 according to the current state of the adaptive temperature control system 10, thereby accurately correcting the working fluid 60. The ground is cooled to the target temperature so that the working fluid can be used to accurately and uniformly control the temperature of the analyte 80. The association of the aforementioned various system parameters with the working fluid temperature will be detailed below.

The target temperature is the temperature of the working fluid that the system wants to output to the object to be tested 80. If the cooling device 20 can output the working fluid close to the target temperature, and then adjust the working fluid temperature by a heater (not shown), only It is necessary to change the temperature of the working fluid to a small extent, which will reduce the energy consumption of the heater. The optimum state is that the temperature of the working fluid outputted by the cooling device 20 is as close as possible to and below the target temperature after the transmission loss, and is then adjusted by the heater to the target temperature.

The evaporator 24 is a place where the working fluid mainly performs heat exchange. Generally, the working fluid flows through the evaporator 24 to reach the temperature close to the evaporator 24, so the control of the system needs to include this parameter (the internal temperature of the evaporator). If the target temperature is lower than the internal temperature of the evaporator, it is usually necessary to speed up the rotation of the motor 212 of the compressor 21 and the speed of the fan 222 of the condenser 22; otherwise, the reverse is true.

When the system is in a stable temperature output state, if the flow rate of the working fluid is increased, because the heat energy that the evaporator 24 can take away from the working fluid is constant, the output temperature will rise, and if the same output temperature is to be maintained, the speed can generally be accelerated. The motor 212 of the compressor 21 rotates; otherwise, vice versa. Therefore, when the control of the system includes this parameter (flow of working fluid), it helps at work. When the flow rate of the fluid is changed, the number of revolutions of the motor 212 of the compressor 21 and the number of revolutions of the fan 222 of the condenser 22 are synchronously changed to quickly reach the target temperature.

When the cooling device 20 is started, the inlet pressure of the compressor 21 is generally close to the outlet pressure. Since the compressor 21 has a certain compression ratio, the large inlet pressure at this time causes a large load on the compressor 21, so that the startup is started. When the speed of the motor 212 of the compressor 21 is not too high, the speed of the motor 212 of the compressor 21 can be increased after the inlet pressure of the compressor 21 is reduced to a certain value, so the control of the system needs to include this parameter (the inlet of the compressor). Pressure) to avoid overloading the compressor 21 when the system is started.

Generally, when the compressor motor speed increases, the cooling efficiency can be improved and a lower output temperature can be obtained. However, the cooling device has a maximum pressure limit due to safety considerations (usually the system automatically turns off when the maximum pressure is exceeded), so When increasing the speed of the compressor motor, pay attention to the outlet pressure of the compressor. Generally, it is necessary to wait for a period of time after increasing the certain speed. After the pressure is stabilized or lower than a certain value, the speed is increased. Therefore, the control of the system needs to include this parameter (compression The outlet pressure of the machine), so that the lower output temperature can be quickly obtained without exceeding the safe working pressure.

Under different working fluid flow rates, there is a certain temperature difference between the target temperature and the temperature of the working fluid cooled by flowing through the evaporator 24. Therefore, the control of the system needs to include this parameter (the working fluid flows through the fluid pipeline to evaporate) The temperature after the device is such that the temperature of the working fluid when it is delivered to the object to be tested 80 is very close to the target temperature.

In addition to the aforementioned system parameters, the input port 33 of the controller 30 may, but is not limited to, receive other system parameters to more accurately control the temperature of the working fluid 60, and the system parameters may include the working fluid 60 The temperature of the fluid line 70 after flowing through the evaporator 24 (for example, the temperature of the working fluid 60 measured at one of the sensing positions 72 shown in FIG. 2), the coolant 25 is at the inlet of the compressor 21. The temperature, the temperature of the coolant 25 at the outlet of the compressor 21, the current of the motor 212 of the compressor 21, the temperature at which the working fluid 60 is sent to the cooling device 20, and the coolant 25 at the outlet of the condenser 22 The temperature, as well as the ambient temperature and humidity around it. In addition, the various system parameters described above can be obtained by actual measurement using various commercially available sensors such as temperature, pressure, humidity, and flow rate in the system. The association of the aforementioned system parameters with the working fluid temperature will be detailed below.

If the temperature of the coolant 25 at the inlet of the compressor 21 is too low, liquid compression may occur, thereby affecting the life of the compressor. When the compressor motor speed is high, the temperature is usually It will be reduced, so in the process of rapid cooling (higher compressor motor speed), this parameter (the temperature of the coolant 25 at the inlet of the compressor 21) should be noted, so the control of the system should include this parameter.

If the temperature of the coolant 25 at the outlet of the compressor 21 is too high, the compressor may have a problem of poor heat dissipation, or even self-power-off protection, which may generally occur at high rotation speeds, in order to make the cooling device 20 The compressor 21 can be operated at high speed without the problem of excessive temperature, and the control of the system needs to include this parameter (the temperature of the coolant 25 at the outlet of the compressor 21).

When the cooling device 20 is in operation, it should be noted that the current of the motor 212 of the compressor 21 cannot exceed the rated value to avoid overloading the system. In order to make the compressor motor and the condenser fan operate quickly and avoid current over-rotation, the control of the system needs to include This parameter (the current of the motor 212 of the compressor 21).

The temperature at which the working fluid is fed into the cooling device 20 may affect the output temperature of the working fluid. Generally, if the temperature of the feed is increased, the output temperature is also increased; otherwise, the opposite is true. If the control of the system includes this parameter (the temperature at which the working fluid is fed into the cooling device 20), the compressor motor speed can be adjusted immediately when the temperature changes, that is, when the input temperature of the working fluid increases, the motor The speed is increased; otherwise, the opposite is true.

When the temperature of the outlet of the condenser 22 is low, the coolant 25 indicates that the coolant is in a supercooled state, and more heat can be taken after entering the evaporator 24, if the control of the system includes the parameter (the coolant 25) At the temperature of the outlet of the condenser 22, the adjustment can be quickly adjusted. For example, the condenser outlet temperature is lowered to take away more heat, and the rotation speed of the compressor motor can be slightly lowered.

If the ambient temperature around the system is lowered, the degree of heat exchange of the condenser 22 is better, and the coolant can be cooled to a lower temperature after flowing through the condenser 22, so that more heat can be taken after entering the evaporator 24, if the system The control includes this parameter (the ambient temperature around), which can be quickly adjusted. For example, when the ambient temperature is lowered, the speed of the compressor motor can be slightly reduced.

In summary, the invention not only can accurately cool the working fluid to the target temperature, so that the working fluid can be used to accurately and uniformly control the temperature of the object to be tested, and can further increase the temperature of the working fluid of the cooling device. Stability, improved energy efficiency to avoid wasting energy, reach the required temperature in less time, protect the compressor from temperature and pressure beyond safe operating range, and operate stably over a wide range of input AC voltages and frequencies .

Referring to FIG. 3, an adaptive temperature control system according to a second preferred embodiment of the present invention is similar to the adaptive temperature control system 10 of the first preferred embodiment, but the cooling device 20 of the present embodiment. 'An additional condenser 91 having a dual piping design is included, and a mixed coolant containing more than one gaseous coolant can be selectively used. The gaseous coolant 25A is compressed in the compressor 21 and flows through the condenser 22. In the condenser 22, the heat of compression of the gas is absorbed, so that some or all of the gaseous coolant 25A is condensed. Then, the coolant 25A flows through the first line 911 of the additional condenser 91, and after flowing through the expander 23, flows into the evaporator 24, and the compressed coolant expands in the evaporator 24 and Therefore, heat is absorbed. The coolant 25B flowing out of the evaporator 24 is returned to the compressor 21 via the second line 912 of the additional condenser 91, and the coolant 25B is more helpful because it is still at a low temperature close to the evaporator temperature. The condensation of gaseous coolant 25A through the first line 911 of the additional condenser 91.

Thereby, the additional condenser 91 can re-cool the coolant 25A cooled by the condenser 22, so that the coolant 25A can lower the working fluid 60 when it flows through the evaporator 24 due to the lower temperature. Low temperature. In addition, the coolant 25B recirculated from the evaporator 24 to the compressor 21 can exchange heat with the coolant 25A during the flow through the additional condenser 91, so that the temperature of the coolant 25A can be lowered. In order to achieve a better cooling effect, the temperature of the coolant 25B which is returned to the compressor 21 can be increased, which will help the liquid portion of the coolant 25B to be converted into a gaseous state to avoid the generation of the compressor 21. Liquid compression.

Moreover, the working fluid 60 can flow through the additional condenser 91 in the fluid line 70 and then through the evaporator 24. In this way, the working fluid 60 can exchange heat with the coolant 25B therein when flowing through the additional condenser 91 to achieve the effect of pre-cooling, so as to rapidly cool down to the desired when flowing through the evaporator 24. temperature.

Referring to FIG. 4, an adaptive temperature control system according to a third preferred embodiment of the present invention is similar to the adaptive temperature control system 10 of the first preferred embodiment, but the cooling device 20 of the present embodiment. Further includes a first additional condenser 92, a second additional condenser 95 having a dual piping design, a gas liquid phase separator 93 disposed between the first and second additional condensers, and an additional expander. 94. This embodiment may use a mixed coolant comprising at least two gaseous coolants, wherein the gaseous coolant having the highest boiling point may be completely condensed first and separated from other coolants in the phase separator 93, and other uncondensed boiling points. Lower gaseous coolant will be separated by phase The gas outlet of the separator flows out and flows into a first line 951 of the second additional condenser 95. In detail, the coolant 25A flowing out of the compressor 21 is cooled by flowing through the condenser 22, and then flows through the first additional condenser 92 to be cooled again, and then, a part of the coolant 25A (boiling point) The higher one has been converted to a liquid state, but the other portion (the lower boiling point) is still in a gaseous state, and thus the gas and liquid coolant 25A are separated by the phase separator 93. The gaseous portion of the coolant 25A flowing out of the phase separator 93 first flows through the first line 951 of the second additional condenser 95 to be cooled again to be converted into a liquid state, and then flows through the expander 23 (for example, expanded). The valve or capillary is depressurized into a low pressure gaseous coolant and then flows into the evaporator 24. The portion of the coolant 25A flowing out of the phase separator 93 in a liquid state flows through the additional expander 94 (for example, an expansion valve or a capillary tube) to be depressurized into a low-pressure gaseous coolant, and then returned to the second additional condenser 95 for use. The gaseous coolant 25A in the second additional condenser 95 is cooled to make it liquid. In other words, the liquid coolant flowing out of the phase separator 93 flows through the additional expander 94 through the second line 952 of the second additional condenser 95 to flow back opposite to the first line 951. The compressed coolant expands in the second line 952 to absorb the thermal energy of the uncondensed gaseous coolant in the first line 951, thereby contributing to the condensation of the lower boiling point gaseous coolant in the first line 951. . The coolant 25A flowing out of the expander 23 exchanges heat with the working fluid 60 as it flows through the evaporator 24. The coolant 25B flowing out of the evaporator 24 is first returned to the second additional condenser 95 and the first additional condenser 92, and is returned to the compressor 21.

Through the recooling of the additional condensers 92, 95, the coolant 25A of the present embodiment can lower the working fluid 60 to a lower temperature as it flows through the evaporator 24 due to lower temperatures. In addition, the temperature of the coolant 25B recirculated from the evaporator 24 to the compressor 21 is relatively low (typically below -10 ° C in the first additional condenser 92; typically below -40 ° C in the second additional condenser 95) And heat exchange with the coolant 25A while flowing through the second additional condenser 95 and the first additional condenser 92 (the coolant 25A is generally slightly above ambient temperature when flowing out of the condenser 22) Thus, not only can the temperature of the coolant 25A be further reduced to achieve a better cooling effect, but also the temperature of the coolant 25B flowing back to the compressor 21 can be increased, which will contribute to the liquid state of the coolant 25B. Partially converted to a gaseous state to avoid liquid compression of the compressor 21.

Furthermore, the working fluid 60 can flow through the first additional condenser 92 and the second additional condenser 95 in the fluid line 70 and then through the evaporator 24, so that the working fluid 60 The fluid 60 can be pre-cooled by heat exchange with the coolant 25B and the coolant from the additional expander 94 to the second additional condenser 95 as it flows through the first and second additional condensers 92, 95. The effect is to lower the temperature to the desired temperature more quickly as it flows through the evaporator 24.

Finally, it is to be noted that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention, and alternative or variations of other equivalent elements should also be the scope of the patent application of the present application. Covered.

Claims (22)

An adaptive temperature control system for cooling a working fluid is used to cool a working fluid to a target temperature; the adaptive temperature control system includes: a cooling device including a compressor, a condenser, and an expansion , an evaporator, a coolant passing through the compressor, the condenser, the expander and the evaporator, and a frequency converter having a motor having a fan for assisting heat dissipation of the coolant The motor is electrically connected to the frequency converter; a controller having a plurality of input ports for receiving a plurality of system parameters, and a first output port electrically connected to the frequency converter, the controller is And receiving, by the first output port, a signal for controlling the rotation speed of the compressor motor; and a fluid line through which the working fluid flows, the working system is cooled by heat exchange with the coolant in the evaporator And for guiding to a test object; wherein the system parameters include the target temperature, the internal temperature of the evaporator, and the working fluid in the fluid tube The flow rate, pressure and inlet and outlet pressure of the compressor. The adaptive temperature control system for cooling a working fluid according to claim 1, wherein the controller has a second output port electrically connected to the fan of the condenser, the controller is based on the system The second output port sends a signal for controlling the fan speed of the condenser. An adaptive temperature control system for cooling a working fluid according to claim 1, wherein the system parameters further comprise a temperature of the working fluid flowing through the evaporator in the fluid line. An adaptive temperature control system for cooling a working fluid according to claim 1, wherein the system parameters further comprise a temperature of the coolant at the compressor inlet. An adaptive temperature control system for cooling a working fluid according to claim 1, wherein the system parameters further comprise a temperature of the coolant at the compressor outlet. An adaptive temperature control system for cooling a working fluid as described in claim 1, wherein the system parameters further comprise current of a motor of the compressor. An adaptive temperature control system for cooling a working fluid as described in claim 1, wherein the system parameters further comprise a temperature at which the working fluid is delivered to the cooling device. An adaptive temperature control system for cooling a working fluid according to claim 1, wherein the system parameters further comprise a temperature of the coolant at the outlet of the condenser. An adaptive temperature control system for cooling a working fluid as described in claim 1, wherein the system parameters further comprise ambient temperature. An adaptive temperature control system for cooling a working fluid according to claim 1, wherein the system parameters further comprise ambient humidity. The adaptive temperature control system for cooling a working fluid according to claim 1, further comprising a power factor corrector for electrically connecting to a power source and electrically connected to the compressor motor. Inverter connected by sex. The adaptive temperature control system for cooling a working fluid according to claim 1, wherein the cooling device further comprises at least one additional condenser, and the coolant flowing out of the compressor flows through the condensation first. The at least one additional condenser and the expander then flow into the evaporator, and the coolant flowing out of the evaporator is first returned to the at least one additional condenser and then returned to the compressor. The adaptive temperature control system for cooling a working fluid according to claim 12, wherein the at least one additional condenser comprises a first additional condenser and a second additional condenser, the cooling device further comprising a phase separator and an additional expander, the coolant flowing from the compressor first flowing through the condenser, the first additional condenser and the phase separator, and then a portion of the coolant flows through the additional expander Reflowing to the second additional condenser and another portion flowing through the second additional condenser, the expander and the evaporator, the coolant flowing out of the evaporator is first returned to the second additional condenser and the The first additional condenser is again returned to the compressor. The adaptive temperature control system for cooling a working fluid according to claim 12, wherein the working fluid flows through the at least one additional condenser and flows through the evaporator in the fluid line. An adaptive temperature control system for cooling a working fluid is used to cool a working fluid to a target temperature set by a user; the adaptive temperature control system includes: a cooling device including a compressor, a a condenser, at least one additional condenser, an expander, an evaporator, a first-class compressor, the condenser, the at least one additional condenser, the expander and the coolant of the evaporator, and a frequency converter, The compressor has a motor, the condenser has a fan for assisting heat dissipation of the coolant, and the motor is electrically connected to the frequency converter; a controller has a plurality of input ports, and is electrically connected to the frequency converter and used for a first output port that sends a signal that controls the speed of the motor of the compressor; and a fluid line through which the working fluid flows, the working fluid, the cooling of the working fluid system and the evaporator, and the at least one additional condenser The agent is cooled by heat exchange and used to be directed to a test object. The adaptive temperature control system for cooling a working fluid according to claim 15, wherein the at least one additional condenser has a first conduit and a second conduit for the coolant to be the first The pipeline and the second pipeline circulate, and the working fluid system simultaneously exchanges heat with the coolant in the first pipeline and the second pipeline. An adaptive temperature control system for cooling a working fluid according to claim 15 wherein the at least one additional condenser has a first conduit and a second conduit, the coolant passing through the first conduit Flowing into the expander, the coolant flows into the compressor via the second line. An adaptive temperature control system for cooling a working fluid according to claim 15 wherein the at least one additional condenser comprises a first additional condenser and a second additional condenser, the cooling device further comprising a phase separator and an additional expander, the coolant flowing from the compressor first flowing through the condenser, the first additional condenser and the phase separator, and then a portion of the coolant flows through the additional expander Reflowing to the second additional condenser and another portion flowing through the second additional condenser, the expander and the evaporator, the coolant flowing out of the evaporator is first returned to the second additional condenser and the The first additional condenser is again returned to the compressor. The adaptive temperature control system for cooling a working fluid according to claim 18, wherein the second additional condenser has a first conduit and a second conduit, and the coolant flows out of the phase separator. a portion that does not flow through the additional expander flows into the expander via a first line of the second additional condenser, the portion of the coolant flowing through the additional expander flowing through the second additional condenser The second line is in turn returned to the compressor. An adaptive temperature control system for cooling a working fluid according to claim 15 wherein the plurality of inputs of the controller receive a plurality of system parameters, and the controller is based on the system parameters The output port sends a signal that controls the speed of the compressor motor. The system parameters include the target temperature and the internal temperature of the evaporator. An adaptive temperature control system for cooling a working fluid according to claim 20, wherein the system parameters further include a flow rate of the working fluid in the fluid line, an inlet pressure of the compressor, and an outlet pressure. Or the temperature of the working fluid flowing through the evaporator in the fluid line. An adaptive temperature control system for cooling a working fluid is used to cool a working fluid to a target temperature; the adaptive temperature control system includes: a cooling device for cooling the working fluid, the cooling device The utility model comprises an evaporator, a compressor with a motor, and a frequency converter for controlling the rotation speed of the motor according to the target temperature and the internal temperature of the evaporator; a power factor corrector is electrically connected to the frequency converter, And receiving a direct current to the frequency converter; and a fluid pipeline, the working fluid is circulated, and the working fluid is cooled by the cooling device for being guided to an object to be tested.