CN217330294U - Closed-loop control air expansion type refrigerator - Google Patents

Abstract

The utility model discloses a closed-loop control air expansion formula refrigerator, including air dryer, air pressure regulator, air expansion turbine, normal atmospheric temperature air mass flow control pipe, normal atmospheric temperature air mass flow regulator, automatically controlled three-way valve, first air temperature sensor, second air temperature sensor, air mass flow sensor, air pressure sensor and controller, each part corresponds connects and forms closed-loop control system. The utility model discloses utilize first air temperature sensor, second air temperature sensor, air flow sensor and air pressure sensor to detect the export air temperature of air expansion turbine, this refrigerator output air temperature, this refrigerator output air flow and air expansion turbine's air inlet air pressure respectively, utilize each parameter control air pressure regulator, normal atmospheric temperature air flow regulator and the automatically controlled three-way valve that the controller combines to detect, realize automatic closed-loop control, improved output air's temperature and flow control ability, do benefit to safe application.

Description

Closed-loop control air expansion type refrigerator

Technical Field

The utility model relates to an air inflation formula refrigerator especially relates to a closed-loop control air inflation formula refrigerator.

Background

The low-temperature air is widely applied to the fields of production, scientific research, testing and the like, has detailed indexes and requirements on the temperature and the flow of the output air according to the requirements of a use environment, and the air refrigerating machine needs to stabilize the output air within a deviation range of a certain temperature and flow target value for a long time, can adjust the temperature and the flow of the output air, and can be applied to daily use after the functions are met.

An air expansion type refrigerator is air cooling equipment which utilizes air expansion to realize a cooling function, the traditional air expansion type refrigerator is open-loop control on temperature, the temperature of output air is controlled by manually adjusting inlet pressure until the target temperature is reached, the mode is influenced by pressure fluctuation of an air source, the outlet temperature can fluctuate up and down along with the pressure, and the stability is poor; meanwhile, in the conventional air expansion type refrigerator, because the individual difference of internal devices causes different flow rates when the output temperatures are the same, the flow rate of the output air cannot be adjusted, and if the rear-end flow resistance is large, the output air pressure is possibly high, which causes potential safety hazards.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is just to provide a closed-loop control air expansion formula refrigerator that can realize adjusting output air temperature, flow and can long-time steady operation for solving above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a closed-loop control air expansion formula refrigerator, includes air dryer, air pressure regulator and air expansion turbine, air dryer's air inlet and intake-tube connection, air dryer's gas outlet with air pressure regulator's air inlet is connected, air pressure regulator's gas outlet with air expansion turbine's air inlet is connected, air expansion turbine's gas outlet and outlet duct are connected, closed-loop control air expansion formula refrigerator still includes normal atmospheric temperature air flow control tube, normal atmospheric temperature air flow regulator, automatically controlled three-way valve, first air temperature sensor, second air temperature sensor, air flow sensor, air pressure sensor and controller, automatically controlled three-way valve is installed through two wherein interfaces just another interface connection trachea on the outlet duct, the first end intercommunication of normal atmospheric temperature air flow control tube is connected air dryer with air pressure regulator's air expansion turbine On the trachea between, the second end of normal atmospheric temperature air flow control tube communicates with each other and connects air expansion turbine with on the trachea between the automatically controlled three-way valve, normal atmospheric temperature air flow control ware is installed on the normal atmospheric temperature air flow control tube, air pressure sensor installs air pressure regulator with on the trachea between the air expansion turbine, first air temperature sensor installs air expansion turbine with on the trachea between the second end of normal atmospheric temperature air flow control tube, second air temperature sensor with air flow sensor installs respectively lie in on the outlet duct the position at automatically controlled three-way valve rear, first air temperature sensor's signal output part second air temperature sensor's signal output part air flow sensor's signal output part with air pressure sensor's signal output part respectively with the signal input part of controller corresponds and links to each other And the control output end of the controller is correspondingly connected with the control input end of the air dryer, the control input end of the air pressure regulator, the control input end of the normal temperature air flow regulator and the control input end of the electric control three-way valve respectively.

Preferably, for the convenience of remote control, the closed-loop control air expansion refrigerator further comprises an industrial personal computer in communication connection with the controller.

The beneficial effects of the utility model reside in that:

the utility model discloses an increase normal atmospheric temperature air flow control pipe, normal atmospheric temperature air flow regulator, automatically controlled three-way valve, first air temperature sensor, second air temperature sensor, air flow sensor, air pressure sensor and controller, utilize first air temperature sensor to detect the export air temperature of air expansion turbine, utilize second air temperature sensor to detect this refrigerator output air temperature, utilize air flow sensor to detect this refrigerator output air flow, utilize air pressure sensor to detect the air inlet air pressure of air expansion turbine, utilize the controller to combine each parameter control air pressure regulator, normal atmospheric temperature air flow regulator and the automatically controlled three-way valve that detects, realize the automatic closed-loop control to this refrigerator output air's temperature and flow, the temperature and the flow control ability to the output air of air expansion formula refrigerator are showing to be improved, is beneficial to the safe application of low-temperature air.

Drawings

Fig. 1 is a schematic structural view of a closed-loop control air expansion refrigerator according to the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1, closed-loop control air expansion type refrigerator includes air dryer 2, air pressure regulator 5, air expansion turbine 10, normal atmospheric temperature air flow control pipe 6, normal atmospheric temperature air flow regulator 8, automatically controlled three-way valve 12, first air temperature sensor 11, second air temperature sensor 16, air flow sensor 14, air pressure sensor 9, controller 4 and industrial computer 7, air dryer 2's air inlet and intake pipe 1 are connected, air dryer 2's gas outlet and air pressure regulator 5's air inlet are connected, air pressure regulator 5's gas outlet and air expansion turbine 10's air inlet are connected, air expansion turbine 10's gas outlet and outlet duct 15 are connected, automatically controlled three-way valve 12 is installed on outlet duct 15 and another interface connection exhaust pipe 13 through two of them interface, normal atmospheric temperature air flow control pipe 6's first end communicates with each other and connects at air dryer 2 and air pressure regulator 5 A second end of the normal temperature air flow adjusting pipe 6 is communicated and connected with an air pipe between the air expansion turbine 10 and the electric control three-way valve 12, the normal temperature air flow adjuster 8 is arranged on the normal temperature air flow adjusting pipe 6, the air pressure sensor 9 is arranged on the air pipe between the air pressure adjuster 5 and the air expansion turbine 10, the first air temperature sensor 11 is arranged on the air pipe between the air expansion turbine 10 and the second end of the normal temperature air flow adjusting pipe 6, the second air temperature sensor 16 and the air flow sensor 14 are respectively arranged on the air outlet pipe 15 at the rear part of the electric control three-way valve 12, the signal output end of the first air temperature sensor 11, the signal output end of the second air temperature sensor 16, the signal output end of the air flow sensor 14 and the signal output end of the air pressure sensor 9 are respectively and correspondingly connected with the signal input end of the controller 4, the control output end of the controller 4 is respectively and correspondingly connected with the control input end of the air dryer 2, the control input end of the air pressure regulator 5, the control input end of the normal temperature air flow regulator 8 and the control input end of the electric control three-way valve 12, and the controller 4 is in communication connection with the industrial personal computer 7. Also shown in fig. 1 is a power supply module 3 for providing both ac 220V and dc 24V power to the entire refrigerator.

As shown in fig. 1, when in use, normal temperature air enters from an air inlet pipe 1, the air moisture content of the air is reduced through an air dryer 2, a detected air inlet air pressure signal of an air expansion turbine 10 is transmitted to a controller 4 through an air pressure sensor 9, a detected outlet air temperature signal of the air expansion turbine 10 is transmitted to the controller 4 through a first air temperature sensor 11, the controller 4 or an industrial personal computer 7 compares corresponding values of the air pressure and the temperature signal with preset values for operation, and then controls an air pressure regulator 5 to enable the air inlet air pressure of the air expansion turbine 10 to be increased or decreased (the air outlet temperature of the air expansion turbine 10 is decreased when the pressure is increased, and the air outlet temperature of the air expansion turbine 10 is increased when the pressure is decreased), so that the first automatic adjustment of the output air temperature is realized; the second air temperature sensor 16 transmits the detected air temperature signal output by the refrigerator to the controller 4, after the controller 4 or the industrial personal computer 7 compares the corresponding value of the air temperature signal with a preset value for operation, the controller controls the normal temperature air flow regulator 8 to send a certain amount of normal temperature air to the air outlet of the air expansion turbine 10 through the normal temperature air flow regulating pipe 6 to be mixed with the cold air, and the temperature of the air output by the refrigerator is regulated to be within a set target range; the air flow sensor 14 transmits the detected air flow signal output by the refrigerator to the controller 4, and after the controller 4 or the industrial personal computer 7 compares the corresponding value of the air flow signal with a preset value for operation, the controller controls the electric control three-way valve 12 to keep unchanged or releases redundant cold air to the atmosphere through the exhaust pipe 13, so that the air flow output by the refrigerator is kept within a set target range.

The refrigerating machine only needs to be connected with an inlet pipeline and an outlet pipeline, and ensures that the pressure of an inlet air source does not fluctuate violently.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (2)

1. A closed-loop control air expansion refrigerator comprising an air dryer, an air pressure regulator and an air expansion turbine, the air inlet of the air dryer being connected to an air inlet duct, the air outlet of the air dryer being connected to the air inlet of the air pressure regulator, the air outlet of the air pressure regulator being connected to the air inlet of the air expansion turbine, the air outlet of the air expansion turbine being connected to an air outlet duct, characterized in that: closed-loop control air expansion formula refrigerator still includes normal atmospheric temperature air flow control pipe, normal atmospheric temperature air flow regulator, automatically controlled three-way valve, first air temperature sensor, second air temperature sensor, air flow sensor, air pressure sensor and controller, automatically controlled three-way valve is installed through two of them interfaces on the outlet duct and another interface connection exhaust pipe, the first end of normal atmospheric temperature air flow control pipe communicates with each other and connects air dryer with on the trachea between the air pressure regulator, the second end of normal atmospheric temperature air flow control pipe communicates with each other and connects air expansion turbine with on the trachea between the automatically controlled three-way valve, normal atmospheric temperature air flow regulator is installed on the normal atmospheric temperature air flow control pipe, air pressure sensor installs air pressure regulator with on the trachea between the air expansion turbine, the first air temperature sensor is arranged on an air pipe between the air expansion turbine and the second end of the normal temperature air flow adjusting pipe, the second air temperature sensor and the air flow sensor are respectively arranged on the air outlet pipe at the position behind the electric control three-way valve, the signal output end of the first air temperature sensor, the signal output end of the second air temperature sensor, the signal output end of the air flow sensor and the signal output end of the air pressure sensor are respectively and correspondingly connected with the signal input end of the controller, and the control output end of the controller is respectively and correspondingly connected with the control input end of the air dryer, the control input end of the air pressure regulator, the control input end of the normal-temperature air flow regulator and the control input end of the electric control three-way valve.

2. A closed-loop control air expansion chiller in accordance with claim 1, wherein: the closed-loop control air expansion type refrigerator further comprises an industrial personal computer in communication connection with the controller.

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