CN206222735U - A kind of screw ultralow temperature single machine two-stage machine set system - Google Patents

A kind of screw ultralow temperature single machine two-stage machine set system Download PDF

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Publication number
CN206222735U
CN206222735U CN201621169737.7U CN201621169737U CN206222735U CN 206222735 U CN206222735 U CN 206222735U CN 201621169737 U CN201621169737 U CN 201621169737U CN 206222735 U CN206222735 U CN 206222735U
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China
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oil
compressor
refrigeration
single machine
machine
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CN201621169737.7U
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Chinese (zh)
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田伟
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Guangdong Eurasia Refrigeration Equipment Manufacturing Co Ltd
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Guangdong Eurasia Refrigeration Equipment Manufacturing Co Ltd
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Abstract

A kind of screw ultralow temperature single machine two-stage machine set system, machine set system includes refrigeration system, compressor return oil system, the middle pressure air compensating system for the compressor tonifying Qi in refrigeration system and the control control system being connected with refrigeration system, compressor return oil system and middle pressure air compensating system respectively;Its control method is based on the screw ultralow temperature single machine two-stage machine set system of said structure;It comprises the following steps:Establish machine testing failure in control system by cable, alarm or wait and be to be launched;Unit freezes, and driver element starts the compressor of refrigeration system, and control compressor is carried out plus unloading output or unloading operation;Driver element starts the full carrying row of refrigeration compressor;Start compressor return oil system control oil temperature, make compressor interval in optimum condition oil temperature all the time;Air compensating system control oil-air pressure is pressed in control in starting, compressor is in optimum condition pressure range all the time;The characteristics of it has safe and reliable, easy to control and efficient energy-saving.

Description

A kind of screw ultralow temperature single machine two-stage machine set system
Technical field
The utility model is related to refrigeration control technology, more particularly to a kind of screw ultralow temperature single machine two-stage machine set system.
Background technology
As China's industrial level and living standard are improved constantly, in industrial production and food processing manufacture, for low The requirement of warm frozen product, fast food freezing etc. is more and more.Conventional cryogenic freezing main frame has two kinds before, and a kind of is common Fluorine machine, one kind is ammonia machine;Common fluorine machine operational efficiency in the case of ultralow temperature is poor, and fluctuation of service produces the temperature of water at low temperature Scope is small, and refrigerating capacity is also poor, is extremely difficult to using effect, and ammonia mechanism cold, then there are major safety risks, to work Environment and staff's requirement are all higher, and maintaining is also higher.
Therefore, the security reliability of refrigeration unit work how is improved, and further reduces its leaving water temperature, improve it Operating efficiency be still skilled person constantly bring forth new ideas attempt solve problem.
Utility model content
The purpose of this utility model is to provide a kind of screw ultralow temperature single machine two-stage machine set system, and it can with safety The characteristics of by, easy to control and efficient energy-saving.
The utility model is achieved like this, a kind of screw ultralow temperature single machine two-stage machine set system, it includes refrigeration System and compressor return oil system, it is characterised in that it also includes being the middle pressure tonifying Qi system of the compressor tonifying Qi in refrigeration system System, and the control control system being connected with refrigeration system, compressor return oil system and middle pressure air compensating system respectively.
The refrigeration system includes refrigeration single machine compression with double stage machine and goes out along refrigeration single machine compression with double stage machine refrigerant Mouthful oil eliminator contacted successively to the pipeline of entrance, First Heat Exchanger, the first stop valve, economizer, the second heat exchanger are gentle Liquid/gas separator;Liquid-sighting glass, filter, the first electromagnetism are also connected with the pipeline that the economizer is connected with the second heat exchanger successively Valve and the first expansion valve, second magnetic valve and second expansion valve of first expansion valve again with series winding are in parallel.
The compressor return oil system includes the pipe to the single machine compression with double stage machine oil inlet that freezes along oil eliminator oil-out Road is connected in the second stop valve, the first oil strainer, oil cooler and the second oil strainer successively;First oil cooler is simultaneously Join the 3rd magnetic valve;Oil is also connected with successively on pipeline between second oil strainer and refrigeration single machine compression with double stage machine oil inlet Flow switch, temperature sensor and oily liquid-sighting glass.
Medium pressure air compensating system includes pressing tonifying Qi import to the first cut-off valve outlet along refrigeration single machine compression with double stage machine Pipeline the 3rd expansion valve and the 4th magnetic valve contacted successively, the 4th magnetic valve also connects with the refrigerant inlet of economizer, And the 4th be also connected with the 5th magnetic valve and the 4th expansion valve on the pipeline that is connected with economizer of magnetic valve successively;5th electricity The refrigerant inlet of the outlet of magnet valve and the import of the 4th magnetic valve also with the first cut-off valve outlet and economizer passes through pipe Road connects;Tonifying Qi import is pressed also to be connected with the gas returning port of economizer in the refrigeration single machine compression with double stage machine.
It is provided with by pipeline connection, the pipeline between the refrigerant outlet and entrance of the refrigeration single machine compression with double stage machine Pressure switch and pressure gauge.
Preferably:The First Heat Exchanger is provided with pressure sensor, and second heat exchanger is provided with TEMP Device.
Preferably:The oil cooler is connected with First Heat Exchanger by heat exchanging pipe, and is also set on the heat exchanging pipe There is temperature sensor.
The control system includes CPU processing centers, collecting unit, input block, communication unit, driver element, output Unit, low-tension supply;The collecting unit includes temperature by communication unit and CPU processing center data links, the collecting unit Degree sensor, pressure sensor, flow collection module and analogue collection module;The driver element is connected to CPU treatment Between center and electronic part, wherein, electronic part includes the switch and valve device on refrigeration single machine compression with double stage machine, pump and pipeline Part, driver element includes Magnetic contactor, relay and thermal protector.
A kind of control method of screw ultralow temperature single machine two-stage machine set system, the screw that he is based on said structure is ultralow Warm single machine two-stage machine set system, the control method comprises the following steps:
(1) machine is established in control system by cable, whether detection input block, output unit and communication unit are normal;Detect all Normally, CPU processing centers call subroutine, program is run and is detected;
Collecting unit is worked, and temperature, pressure and the flow signal that will be collected are transmitted by input block and communication unit Judge whether unit can be normally-open according to input signal data to CPU processing centers, CPU processing centers;If abnormal, CPU Processing center sends alarm signal, and display alarm information or fault message on control screen;If all data are normal, control Processing procedure sequence is standby, waits order to be launched;
(2) when starting unit refrigeration, CPU processing centers send startup refrigeration mode, by output unit that enabling signal is defeated Go out to driver element, driver element compressor then according to signal enabling refrigeration system, respective valves, pump and other are electronic Part;When driver element driven, then collecting unit starts the cycle over collection, will accordingly gather information input to CPU treatment in The heart;CPU processing centers judge whether compressor starts according to input gathered data;Collecting unit circle collection, by gathered data Input CPU processing centers, CPU processing centers are carried out plus unloading output according to input data to compressor, are held by driver element OK;When temperature collecting cell collects cold water turnover water temperature over-high, CPU processing centers then compressor unloading operation, by driving Unit is performed;
(3) when use condition reaches unit carries service condition entirely, CPU processing centers send the full carrying row letter of compressor Number, driver element starts the full carrying row of refrigeration compressor;Collecting unit circle collection, CPU processing centers are input into by gathered data, CPU processing centers carry out loading output according to input data to compressor, are performed by driver element;
(4) when compressor high oil temperature, CPU processing centers start the valve and switch in compressor return oil system, Fluid is lowered the temperature by the oil cooler in compressor return oil system;Collecting unit circle collection, CPU is input into by gathered data Processing center, CPU processing centers are judged that when oil temperature reaches reasonable interval, then CPU sends compressor according to input data Oil return system silence signal, is performed by driver element;
(5) in the middle of during pressure tonifying Qi, CPU processing centers send signal, and driver element control is pressed in air compensating system in starting Valve and switch, while collecting unit starts the cycle over collection, will accordingly gather information input to CPU processing centers;Work as oil pressure When reaching reasonable interval, then CPU sends middle pressure air compensating system silence signal, is performed by driver element.
The beneficial effects of the utility model are:The utility model overcomes existing General low temperature handpiece Water Chilling Units leaving water temperature not Low, the inefficient and energy-saving effect of unit operation is not substantially and the poor problem of ammonia machine security;Relative to conventional rack, this Utility model has carried out Curve guide impeller from set structure and control method, can effectively improve unit in low temperature water outlet Water outlet scope, improve unit operation stability, meet temperature in use, improve the efficiency of unit, expand the use condition of unit. The Energy Efficiency Ratio of unit is improved, saving energy consumption reduces financial cost.
Brief description of the drawings
Fig. 1 is the structure principle chart of the utility model screw ultralow temperature single machine two-stage machine set system.
Fig. 2 is the flow chart of the utility model screw ultralow temperature single machine two-stage machine set system control method.
Fig. 3 is the implementation structure chart of driver element in the utility model control system.
In figure, 1, refrigeration single machine compression with double stage machine 2, oil eliminator 3, First Heat Exchanger 4, the first stop valve 5, warp Ji device 6, liquid-sighting glass 7, filter 8, the first magnetic valve 9, the first expansion valve 10, the second magnetic valve 11, the second expansion valve 12nd, the second heat exchanger 13, gas-liquid separator 14, pressure gauge 15, pressure switch 16, second stop valve the 17, first oil filtering Device 18, the 3rd magnetic valve 19, oil cooler 20, the second oil strainer 21, oily flow switch 22, temperature sensor 23, Oily liquid-sighting glass 24, the 4th expansion valve 25, the 5th magnetic valve 26, the 4th magnetic valve 27, the 3rd expansion valve 28, pressure sensing Device.
Specific embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
As shown in figure 1, the utility model is achieved in that the screw ultralow temperature single machine two-stage machine set system includes Refrigeration system and compressor return oil system, it is structurally characterized in that it also includes being mended for the middle pressure of the compressor tonifying Qi in refrigeration system Gas system, and the control control system being connected with refrigeration system, compressor return oil system and middle pressure air compensating system respectively.
The utility model in the specific implementation, by following frame mode realized by its each crucial building block, The refrigeration system includes refrigeration single machine compression with double stage machine 1 and along the refrigerant outlet of refrigeration single machine compression with double stage machine 1 to entering Mouthful the oil eliminator 2 contacted successively of pipeline, First Heat Exchanger 3, the first stop valve 4, economizer 5, the second heat exchanger 12 it is gentle Liquid/gas separator 13;Also be connected with successively on the pipeline that the economizer 5 is connected with the second heat exchanger 12 liquid-sighting glass 6, filter 7, First magnetic valve 8 and the first expansion valve 9, first expansion valve 9 again with series winding the second magnetic valve 10 and the second expansion valve 11 It is in parallel;The refrigeration system is the cooling cycle system for being exported to entrance from refrigeration single machine compression with double stage machine 1, and refrigerating fluid is passed through successively Cross oil eliminator 2, First Heat Exchanger 3, the first stop valve 4, economizer 5, the second heat exchanger 12 and gas-liquid separator 13 and return to system The entrance of cold single machine compression with double stage machine 1, the refrigeration flow quantity of refrigeration system and monitoring pass through liquid-sighting glass 6, filter 7, first Magnetic valve 8, the first expansion valve 9, the second magnetic valve 10 and the second expansion valve 11 are controlled, when implementing, the compression in refrigeration system Pump and stop valve, magnetic valve, expansion valve in machine, oil eliminator 2 are connected with control system control.
The compressor return oil system is included along the oil-out of oil eliminator 2 to the oil inlet of single machine compression with double stage machine 1 that freezes Pipeline is connected in the second stop valve 16, the first oil strainer 17, the oil strainer 20 of oil cooler 19 and second successively;Described first The 3rd magnetic valve 18 in parallel of oil cooler 19;Pipe between second oil strainer 20 and the oil inlet of refrigeration single machine compression with double stage machine 1 Oily flow switch 21, temperature sensor 22 and oily liquid-sighting glass 23 are also connected with road successively;The compressor return oil system is mainly used In the cooling of compressor fluid, it is to avoid the reliability of the too high influence work of fluid;The high-temperature oil liquid of oil eliminator 2 passes sequentially through Two stop valves 16, the first oil strainer 17,19 and second oil strainer of oil cooler 20 return to refrigeration single machine compression with double stage machine 1, The flow control of fluid is realized with monitoring by oily flow switch 21, temperature sensor 22 and oily liquid-sighting glass 23, when implementing, pressure Stop valve, magnetic valve and oily flow switch 21 in contracting machine oil return system are connected with control system control.
Medium pressure air compensating system includes pressing tonifying Qi import to the first stop valve 4 to go out along refrigeration single machine compression with double stage machine 1 Mouthful pipeline the 3rd expansion valve 27 and the 4th magnetic valve 26 contacted successively, the 4th magnetic valve 26 also with the refrigerant of economizer 5 Entrance is connected, and it is swollen to be also connected with the 5th magnetic valve 25 and the 4th successively on the pipeline that is connected with economizer 5 of the 4th magnetic valve 26 Swollen valve 24;The outlet of the 5th magnetic valve 25 and the import of the 4th magnetic valve 26 are also exported and passed through with the first stop valve 4 The refrigerant inlet of Ji device 5 passes through pipeline connection;Pressed in the refrigeration single machine compression with double stage machine 1 tonifying Qi import also with economizer 5 Gas returning port connection.It can be in time the fluid tonifying Qi supercharging in compressor operating on low voltage that air compensating system is pressed in this, improve refrigeration The efficiency and reliability of system work, when the oil pressure of the single machine compression with double stage machine 1 that freezes is relatively low, part oil gas is no longer pass through Second heat exchanger 12, but directly exported by the first stop valve 4 and the return compressor of economizer 5, by the 4th expansion valve 24th, the 5th magnetic valve 25, the 4th magnetic valve 26 and the 3rd expansion valve 27 control flow so that the work of refrigeration single machine compression with double stage machine 1 Make under suitable oil pressure state, the efficiency and security of system work can be significantly improved;When implementing, middle pressure air compensating system In magnetic valve and expansion valve with control system control be connected.
In order to real-time monitoring system pipeline oil working condition, the utility model is also provided with various pressure and temperature Degree monitoring modular, by pipeline connection between the refrigerant outlet and entrance of the refrigeration single machine compression with double stage machine 1, on the pipeline It is provided with pressure switch 15 and pressure gauge 14;First Heat Exchanger 3 is provided with pressure sensor 28, and second heat exchanger 12 is provided with Temperature sensor 22;The oil cooler 19 is connected with First Heat Exchanger 3 by heat exchanging pipe, and is additionally provided with the heat exchanging pipe Temperature sensor 22;Can so be monitored between the refrigerant outlet of refrigeration single machine compression with double stage machine 1 and entrance by pressure gauge 14 Pressure differential, and by the real-time regulation of pressure switch 15, and temperature sensor 22 is then capable of the shape of real-time monitoring heat exchanger work Condition.
In order to Automated condtrol is better achieved, the utility model is also designed control system, it including CPU at Reason center, collecting unit, input block, communication unit, driver element, output unit, low-tension supply;The input block be by Collecting unit gathers corresponding information input to the module of CPU processing center units;CPU processing centers are that input signal is carried out Diagnosis, then sends instruction, and driver element is controlled by CPU processing centers, and output unit is used to send control signal;Low-tension supply Powered to the low pressure original paper of intelligent controller, it includes rectification circuit and mu balanced circuit;The collecting unit is single by communicating Unit and CPU processing center data links, the collecting unit include temperature sensor 22, pressure sensor 28, flow collection module And analogue collection module, it is used for the collection of external information, be used to judge unit whether the mould that can be opened and open Formula;The driver element is connected between CPU processing centers and electronic part, wherein, electronic part includes refrigeration single machine compression with double stage Switch and valve device on machine 1, pump and pipeline, driver element include Magnetic contactor, relay and thermal protector, such as Shown in Fig. 3.The control system can realize the integrated and intelligent of refrigeration system, compressor return oil system and middle pressure air compensating system Change control so that each system coordination coordinates, not only efficient energy-saving, also more automation, intellectuality.
The utility model is based on above-mentioned screw ultralow temperature single machine two-stage machine set system, also describes a kind of intelligent and high-efficiency Control method, the control method comprises the following steps, as shown in Figure 2:
(1) machine is established in control system by cable, whether detection input block, output unit and communication unit are normal;Detect all Normally, CPU processing centers call subroutine, program is run and is detected;
Collecting unit is worked, and temperature, pressure and the flow signal that will be collected are transmitted by input block and communication unit Judge whether unit can be normally-open according to input signal data to CPU processing centers, CPU processing centers;If abnormal, CPU Processing center sends alarm signal, and display alarm information or fault message on control screen;If all data are normal, control Processing procedure sequence is standby, waits order to be launched;
(2) when starting unit refrigeration, CPU processing centers send startup refrigeration mode, by output unit that enabling signal is defeated Go out to driver element, driver element compressor then according to signal enabling refrigeration system, respective valves, pump and other are electronic Part;When driver element driven, then collecting unit starts the cycle over collection, will accordingly gather information input to CPU treatment in The heart;CPU processing centers judge whether compressor starts according to input gathered data;Collecting unit circle collection, by gathered data Input CPU processing centers, CPU processing centers are carried out plus unloading output according to input data to compressor, are held by driver element OK;When temperature collecting cell collects cold water turnover water temperature over-high, CPU processing centers then compressor unloading operation, by driving Unit is performed;
(3) when use condition reaches unit carries service condition entirely, CPU processing centers send the full carrying row letter of compressor Number, driver element starts the full carrying row of refrigeration compressor;Collecting unit circle collection, CPU processing centers are input into by gathered data, CPU processing centers carry out loading output according to input data to compressor, are performed by driver element;
(4) when compressor high oil temperature, CPU processing centers start the valve and switch in compressor return oil system, Fluid is lowered the temperature by the oil cooler in compressor return oil system;Collecting unit circle collection, CPU is input into by gathered data Processing center, CPU processing centers are judged that when oil temperature reaches reasonable interval, then CPU sends compressor according to input data Oil return system silence signal, is performed by driver element;
(5) in the middle of during pressure tonifying Qi, CPU processing centers send signal, and driver element control is pressed in air compensating system in starting Valve and switch, while collecting unit starts the cycle over collection, will accordingly gather information input to CPU processing centers;Work as oil pressure When reaching reasonable interval, then CPU sends middle pressure air compensating system silence signal, is performed by driver element;
In above-mentioned steps, for process and original that above-mentioned CPU processing centers control compressor operating by driver element Reason, to those skilled in the art, whole process can be implemented with reference to accompanying drawing 1, in detail below in illustrative step (4) completely The control process of middle pressure tonifying Qi in high oil temperature and step (5), during central pressure tonifying Qi, collecting unit passes to fuel injection pressure signal CPU processing centers, CPU processing centers are judged according to the signal, and by driver element control open the 4th magnetic valve 26, 3rd expansion valve 27 and the 5th magnetic valve 25 and the 4th expansion valve 24, now fluid is by the first stop valve 4, the 4th magnetic valve 26 and the 3rd expansion valve 27 also or by the first stop valve 4, economizer 5, the 4th expansion valve 24, five magnetic valves 25, the 4th electromagnetism Valve 26 and the 3rd expansion valve 27 return to compressor, by the folding control flow of control valve, the amount that control oil gas is returned, so that Quick regulation fluid operating pressure, reaches the working condition of best safety.When high oil temperature, collecting unit believes high oil temperature Number CPU processing centers are passed to, CPU processing centers are judged according to the signal, and control to open second by driver element Stop valve 16, the first oil strainer 17, the oil strainer 20 of oil cooler 19 and second, fluid by after oil eliminator 2 by oil cooling But during device 19 returns to refrigeration single machine compression with double stage machine 1 after condensing, so as to reduce the oil of the work of refrigeration single machine compression with double stage machine 1 Liquid temperature degree, while driver element can control fluid stream by the 3rd magnetic valve 18,21 and second stop valve of oily flow switch 16 Amount and path, so that quick regulation oil temperature is interval, comply with the optimum working temperature of the work of refrigeration single machine compression with double stage machine 1.
The utility model General low temperature unit leaving water temperature too high problem well, can only do relative to common unit To -35 DEG C of low temperature water outlet, the utility model unit is minimum when actually used can to accomplish -60 DEG C of water outlets, while unit can temperature Degree operation, Energy Efficiency Ratio is high, and the unsafe factor of ammonia mechanism cold is overcome again;Industrial low-temperature and ultra-low temperature cold water dispenser can be met The freezing function of group, and the civilian low-temperature quick-freezing demand of energy, unit operation are steady, and Energy Efficiency Ratio is high, energy-conserving and environment-protective, full intellectualized Control, is capable of achieving the integrated controls such as left unguarded, automatic running, automatic fault alarm.
Relative to conventional rack, the utility model uses single machine compression with double stage technology, and compression efficiency is high, and handpiece Water Chilling Units are in system The common unit of Energy Efficiency Ratio when cold is high by more than 30%;Unit can preferably give play to machine using the integrated control of system optimization is used The performance of group, improves the operational efficiency of unit;Unit uses intelligentized control method, and control stability is high, high degree of automation, can be real It is existing unattended, effectively reduce and use cost of labor;System with economical and energy saving device run, can with effectively save operating cost, Economic benefit is obvious;Using intelligentized control method, control efficiency is high, saves cost of labor;Intelligentized control method, can automatically select operation Pattern, it is ensured that unit runs under the pattern of energy-conservation all the time;Control is reliable, stable.

Claims (8)

1. a kind of screw ultralow temperature single machine two-stage machine set system, it includes refrigeration system and compressor return oil system, its feature Be that it also includes being the middle pressure air compensating system of the compressor tonifying Qi in refrigeration system, and respectively with refrigeration system, compressor The control control system that oil return system is connected with middle pressure air compensating system.
2. screw ultralow temperature single machine two-stage machine set system as claimed in claim 1, it is characterised in that the refrigeration system bag Include refrigeration single machine compression with double stage machine (1) and along refrigeration single machine compression with double stage machine (1) refrigerant outlet to entrance pipeline according to The oil eliminator (2) of secondary series winding, First Heat Exchanger (3), the first stop valve (4), economizer (5), the second heat exchanger (12) are gentle Liquid/gas separator (13);
Also be connected with successively on the pipeline that the economizer (5) connects with the second heat exchanger (12) liquid-sighting glass (6), filter (7), First magnetic valve (8) and the first expansion valve (9), first expansion valve (9) and with series winding the second magnetic valve (10) and second Expansion valve (11) is in parallel.
3. screw ultralow temperature single machine two-stage machine set system as claimed in claim 2, it is characterised in that the compressor oil return System includes being connected in second successively along oil eliminator (2) oil-out to the pipeline of single machine compression with double stage machine (1) oil inlet that freezes Stop valve (16), the first oil strainer (17), oil cooler (19) and the second oil strainer (20);
The 3rd magnetic valve (18) of first oil cooler (19) parallel connection;
Oily stream is also connected with successively on pipeline between second oil strainer (20) and refrigeration single machine compression with double stage machine (1) oil inlet Amount switch (21), temperature sensor (22) and oily liquid-sighting glass (23).
4. screw ultralow temperature single machine two-stage machine set system as claimed in claim 3, it is characterised in that medium pressure tonifying Qi system System includes what the pipeline that pressure tonifying Qi import is exported to the first stop valve (4) along refrigeration single machine compression with double stage machine (1) was contacted successively 3rd expansion valve (27) and the 4th magnetic valve (26), refrigerant inlet of the 4th magnetic valve (26) also with economizer (5) are connected, and The 5th magnetic valve (25) and the 4th expansion valve are also connected with successively on the pipeline that 4th magnetic valve (26) is connected with economizer (5) (24);
The outlet of the 5th magnetic valve (25) and the import of the 4th magnetic valve (26) also with the first stop valve (4) outlet and The refrigerant inlet of economizer (5) passes through pipeline connection;
Gas returning port of the pressure tonifying Qi import also with economizer (5) is connected in refrigeration single machine compression with double stage machine (1).
5. screw ultralow temperature single machine two-stage machine set system as claimed in claim 4, it is characterised in that the refrigeration unit is double Pressure switch (15) and pressure are provided with by pipeline connection, the pipeline between the refrigerant outlet and entrance of level compressor (1) Table (14).
6. screw ultralow temperature single machine two-stage machine set system as claimed in claim 5, it is characterised in that First Heat Exchanger (3) Pressure sensor (28) is provided with, second heat exchanger (12) is provided with temperature sensor (22).
7. screw ultralow temperature single machine two-stage machine set system as claimed in claim 6, it is characterised in that the oil cooler (19) connected by heat exchanging pipe with First Heat Exchanger (3), and temperature sensor (22) is additionally provided with the heat exchanging pipe.
8. screw ultralow temperature single machine two-stage machine set system as claimed in claim 6, it is characterised in that the control system bag Include CPU processing centers, collecting unit, input block, communication unit, driver element, output unit and low-tension supply;
The collecting unit includes temperature sensor by communication unit and CPU processing center data links, the collecting unit (22), pressure sensor (28), flow collection module and analogue collection module;
The driver element is connected between CPU processing centers and electronic part, wherein, electronic part includes refrigeration single machine compression with double stage Switch and valve device on machine (1), pump and pipeline, driver element include Magnetic contactor, relay and thermal protector.
CN201621169737.7U 2016-11-02 2016-11-02 A kind of screw ultralow temperature single machine two-stage machine set system Expired - Fee Related CN206222735U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106403336A (en) * 2016-11-02 2017-02-15 广州欧亚制冷设备制造有限公司 Screw type ultralow temperature one-machine two-stage unit system and control method
CN110411054A (en) * 2019-07-09 2019-11-05 南京天加环境科技有限公司 A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature and control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106403336A (en) * 2016-11-02 2017-02-15 广州欧亚制冷设备制造有限公司 Screw type ultralow temperature one-machine two-stage unit system and control method
CN110411054A (en) * 2019-07-09 2019-11-05 南京天加环境科技有限公司 A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature and control method
CN110411054B (en) * 2019-07-09 2021-02-02 南京天加环境科技有限公司 Gas heat pump air conditioning system capable of reducing temperature of lubricating oil and control method

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