CN109668355A - A kind of Heat Exchanger in Refrigeration System gas circuit variable switching device and its control method - Google Patents
A kind of Heat Exchanger in Refrigeration System gas circuit variable switching device and its control method Download PDFInfo
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- CN109668355A CN109668355A CN201811504899.5A CN201811504899A CN109668355A CN 109668355 A CN109668355 A CN 109668355A CN 201811504899 A CN201811504899 A CN 201811504899A CN 109668355 A CN109668355 A CN 109668355A
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- heat exchanger
- refrigeration system
- switching device
- gas circuit
- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device and its control methods, wherein the Heat Exchanger in Refrigeration System gas circuit variable switching device includes four-way valve, First Heat Exchanger, the second heat exchanger and solenoid valve；The Heat Exchanger in Refrigeration System gas circuit variable switching device and its control method can pass through the switching of gas circuit, Variable Control, the refrigeration system that must be fixedly arranged at a range especially suitable for air quantity or water flow and heat exchanging quantitative change amount is needed to be controlled are carried out to through the gas-liquid content in the obtained gas-liquid mixed refrigerant that exchanges heat.
Description
Technical field
The present invention relates to refrigeration technology fields, switch in particular to a kind of Heat Exchanger in Refrigeration System gas circuit variable and fill
It sets and its control method.
Background technique
Heat exchanger used in present refrigeration system is broadly divided into air-cooled, two kinds of water cooling, mainly dependence change air quantity
And water flow meets the heat-exchanging state demands of system needs.But when the heat exchanger of refrigeration system is because of the spy of usage type
As soon as different property, air quantity or water flow must be fixedly arranged at a range and have the demand of heat exchange amount variable, it is not available above method
To realize variable.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching devices
And its control method, the Heat Exchanger in Refrigeration System gas circuit variable switching device and its control method can by the switching of gas circuit,
Variable Control is carried out to through the gas-liquid content in the obtained gas-liquid mixed refrigerant that exchanges heat；The Heat Exchanger in Refrigeration System gas circuit becomes
It is simple to measure switching device structure, it is reliable for operation, it can be overlapped combination according to demand, it is necessary especially suitable for air quantity or water flow
The refrigeration system for being fixed on a range and heat exchanging quantitative change amount being needed to be controlled.
Correspondingly, the embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device and its controlling parties
Method, the Heat Exchanger in Refrigeration System gas circuit variable switching device include four-way valve, First Heat Exchanger, the second heat exchanger and electromagnetism
Valve；Wherein, the intake valve port of the four-way valve is connect with gas source, and the first switching valve port of four-way valve is connect with First Heat Exchanger,
Second switching valve port of four-way valve is connect with one end of the second heat exchanger, the other end of the second heat exchanger and the intermediate valve of four-way valve
Mouth connection；
The Heat Exchanger in Refrigeration System gas circuit variable switching device is provided with recovery pipe, and the recovery pipe setting is the
On pipeline between two heat exchangers and the second switching valve port, the solenoid valve is arranged in the recovery pipe.
Optional embodiment, the Heat Exchanger in Refrigeration System gas circuit variable switching device are optionally provided with two kinds of work
Mode, respectively monodromy heat pattern and double heat exchange modes.
Optional embodiment, under monodromy heat pattern, the four-way valve is failure to actuate, the intake valve port of the four-way valve with
First switching valve port connection；Intake valve port, first switching valve port of the gas of gas source through four-way valve flow into First Heat Exchanger and carry out
Heat exchange, the gas-liquid mixture obtained after heat exchange are flowed out from the outlet of First Heat Exchanger；
Second heat exchanger is in idle state, and the solenoid valve in the recovery pipe is in the open state.
Optional embodiment, under double heat exchange modes, the four-way valve events, the intake valve port of the four-way valve and
Two switching valve ports are connected to, and the solenoid valve in the recovery pipe is in closed state；
Intake valve port, second switching valve port of the gas of gas source through four-way valve flow into the second heat exchanger and carry out level-one heat exchange；
The intermediate valve port of the four-way valve is connected to the first switching valve port, obtains gas-liquid mixture from the second heat exchange after level-one exchanges heat
The outlet of device is flowed out, and intermediate valve port, the first switching valve port through four-way valve flow into First Heat Exchanger and carry out secondary heat exchange, through second level
The gas-liquid mixture obtained after heat exchange is flowed out from the outlet of First Heat Exchanger.
The embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device, the refrigeration system heat exchange
Device gas circuit variable switching device by the movement of four-way valve, can the gas-liquid content to the gas-liquid mixed refrigerant carry out variable control
System；The Heat Exchanger in Refrigeration System gas circuit variable switching device structure is simple, reliable for operation, can be overlapped group according to demand
It closes, the refrigeration system that must be fixedly arranged at a range especially suitable for air quantity or water flow and heat exchanging quantitative change amount is needed to be controlled
System.
Correspondingly, the embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device composite module,
The Heat Exchanger in Refrigeration System gas circuit variable switching device composite module is switched by multiple Heat Exchanger in Refrigeration System gas circuit variables to be filled
Set composition.
Correspondingly, the embodiment of the invention provides a kind of controlling parties of Heat Exchanger in Refrigeration System gas circuit variable switching device
Method, the control method include:
According to the demand of refrigeration system heat exchange amount, touch screen is controlled by refrigeration system and selects Heat Exchanger in Refrigeration System gas circuit
The operating mode of variable switching device；
By the solenoid valve in PLC controls Heat Exchanger in Refrigeration System gas circuit variable switching device, make electricity
Magnet valve is powered；Or
By the four-way valve in PLC controls Heat Exchanger in Refrigeration System gas circuit variable switching device, make four
Port valve is powered.
Optional embodiment, it is described to select Heat Exchanger in Refrigeration System gas circuit variable to cut by refrigeration system control touch screen
The operating mode of changing device, comprising:
Touch screen, which is controlled, by refrigeration system selects monodromy hot loop mode or double heat-exchanging loop modes；
The refrigeration system control touch screen issues corresponding instruction to programmable logic controller (PLC) according to the selected mode
In.
Optional embodiment, the output type of the programmable logic controller (PLC) are relay output, pass through control the
One relay controls the power on/off of solenoid valve, controls the power on/off of four-way valve by the second relay of control；
First relay includes the first relay coil and the first relay normally open contact, the first relay line
Circle connects on the output pin of programmable controller, and first relay normally open contact is connected on the electrical circuit where solenoid valve
In；
Second relay includes the second relay coil and the second relay normally open contact, the second relay line
Circle connects on the output pin of programmable controller, and second relay normally open contact is connected on the electrical circuit where solenoid valve
In.
Optional embodiment, it is described to be switched by PLC controls Heat Exchanger in Refrigeration System gas circuit variable
Solenoid valve in device, makes solenoid valves, comprising:
When controlling touch screen selection monodromy hot loop mode by refrigeration system, the refrigeration system control touch screen is issued
Monodromy heat pattern instructs in programmable logic controller (PLC) accordingly；
Programmable logic controller (PLC) connects the output pin circuit where the first relay coil according to instruction, first after
Electric apparatus coil obtain it is electric, the first relay normally open contact closure, connect the electrical circuit of solenoid valve, solenoid valve obtains electric.
Optional embodiment, it is described to be switched by PLC controls Heat Exchanger in Refrigeration System gas circuit variable
Four-way valve in device, makes four-way valve be powered, comprising:
When controlling touch screen selection pair heat-exchanging loop mode by refrigeration system, the refrigeration system control touch screen is issued
Double heat exchange modes instruct in programmable logic controller (PLC) accordingly；
Programmable logic controller (PLC) connects the output pin circuit where the second relay coil according to instruction, second after
Electric apparatus coil obtain it is electric, the second relay normally open contact closure, connect the electrical circuit of four-way valve, four-way valve obtains electric.
The embodiment of the present invention provides a kind of control method of Heat Exchanger in Refrigeration System gas circuit variable switching device, in the control
In method processed, the refrigeration system control touch screen provides operation interface for user, and the Heat Exchanger in Refrigeration System gas circuit becomes
Amount switching device is provided with two modes of monodromy hot loop and double heat-exchanging loops, and user selects corresponding according to refrigeration system heat exchange amount
Mode；The programmable logic controller (PLC) of refrigeration system is arrived in the instruction that the refrigeration system control touch screen issues corresponding modes
In, programmable logic controller (PLC) is to controlling；The programmable logic controller (PLC) controls the finger of touch screen according to refrigeration system
It enables, by relay to two critical elements (four-way valve and solenoid valve) in Heat Exchanger in Refrigeration System gas circuit variable switching device
Power on/off is controlled；The four-way valve and solenoid valve carry out power on/off according to the selected mode, make Heat Exchanger in Refrigeration System gas
Road variable switching device operates normally.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it is clear that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure composition schematic diagram of Heat Exchanger in Refrigeration System gas circuit variable switching device in the embodiment of the present invention；
Fig. 2 be in the embodiment of the present invention Heat Exchanger in Refrigeration System gas circuit variable switching device under monodromy hot loop mode
Pneumatic diagram；
Fig. 3 be in the embodiment of the present invention Heat Exchanger in Refrigeration System gas circuit variable switching device under double heat-exchanging loop modes
Pneumatic diagram；
Fig. 4 is that the structure composition of Heat Exchanger in Refrigeration System gas circuit variable switching device composite module in the embodiment of the present invention is shown
It is intended to.
Fig. 5 is the stream of the control method of one of embodiment of the present invention Heat Exchanger in Refrigeration System gas circuit variable switching device
Journey schematic diagram；
Fig. 6 is the output pin wiring schematic diagram of programmable logic controller (PLC) in the embodiment of the present invention；
Fig. 7 is the operating circuit of solenoid valve in Heat Exchanger in Refrigeration System gas circuit variable switching device in the embodiment of the present invention
Figure；
Fig. 8 is the operating circuit of four-way valve in Heat Exchanger in Refrigeration System gas circuit variable switching device in the embodiment of the present invention
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
In refrigeration systems, refrigerant compression is the gas refrigerant of high temperature and pressure by compressor, the high temperature and pressure
Gas refrigerant carries out condensation liquefaction heat release, because heat exchanger heat transfer effect is limited, the gas refrigeration firstly the need of through heat exchanger
Agent can only be partially converted into liquid refrigerant；In some refrigeration systems, need to the gas-liquid mixed refrigeration obtained after exchanging heat
Gas-liquid content in agent carries out Variable Control.
The embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device, the refrigeration system heat exchange
Device gas circuit variable switching device can by the switching of gas circuit, to through the gas-liquid content in the obtained gas-liquid mixed refrigerant that exchanges heat into
Row Variable Control.
Fig. 1 is the structure composition schematic diagram of Heat Exchanger in Refrigeration System gas circuit variable switching device in the embodiment of the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device, the system
Cooling system heat exchanger gas circuit variable switching device includes four-way valve 1, First Heat Exchanger 2, the second heat exchanger 3 and solenoid valve 4.
Specifically, the setting of four-way valve 1, there are four valve port, respectively intake valve port 11, first switches valve port 12, centre
Valve port 13 and the second switching valve port 14, wherein intake valve port 11 is public inlet end.In embodiments of the present invention, the four-way
Valve 1 is mainly controlled by its internal electromagnetic valve coil: when electromagnetic valve coil no power, the intake valve port 11 and the first switching
Valve port 12 is connected to, and intermediate valve port 13 is connected to the second switching valve port 14；When electromagnetic valve coil is powered, the intake valve port 11 with
Second switching valve port 14 is connected to, and the first switching valve port 12 is connected to intermediate valve port 13.In addition, the first switching valve port 12 and the
The connection of one heat exchanger 2；One end of second heat exchanger 3 is connect with intermediate valve port 13, and the other end and the second switching valve port 14 connect
It connects.
Specifically, the First Heat Exchanger 2 and the second heat exchanger 3 may be alternatively arranged as finned air cooling heat exchanger or set
Pipe heat exchanger or shell-and-tube heat exchanger or brazing plate type heat exchanger.
It should be noted that the finned air cooling heat exchanger is mainly reached by installing fin additional on common base tube
The purpose of augmentation of heat transfer；For finned air cooling heat exchanger because using machinery around piece, radiating fin and heat-dissipating pipe contact surface are big and tight, because
This has the advantages that heat transfer property is good, stable；When gas flows through heat exchange manifold, heat passes through tightly around the fin on pipeline
It is transmitted to by the air between fin, achievees the effect that heat exchange；But the operating pressure of finned air cooling heat exchanger is usually no more than
0.8Mpa, operating temperature are usually no more than 170 DEG C.
It should be noted that described sleeve pipe formula heat exchanger is formed by connecting concentric circles set with two kinds of different standard pipes of size
Shell side is in pipe, outside, and internal is tube side；Two kinds of different mediums can in shell side and tube side reverse flow (or in the same direction) to reach
To the effect of heat exchange；Double pipe heat exchanger have structure is simple, heat transfer area increase and decrease freely, good heat-transfer and facilitate installation
Advantage；But it because double pipe heat exchanger generally passes through welding and is attached two kinds of different standard pipes of size, is connecting
Place is easy to happen leakage, and overhauls, cleans and dismantle all relatively cumbersome.
It should be noted that the shell-and-tube heat exchanger is to close the wall surface restrained in the housing as between heat-transfer area
Wall type heat exchanger；The shell-and-tube heat exchanger has that structure is simple, low cost, flow area is wider and is readily cleaned the excellent of scale
Point, and can use under high temperature and pressure；But shell-and-tube heat exchanger has that heat transfer coefficient is lower, area occupied is big.
It should be noted that the brazing plate type heat exchanger is by a series of sheet metal closed assemblies with certain corrugated shape
A kind of new type high efficient heat exchanger being process by soldering.Thin rectangular shape channel is formed between various plates, is carried out by plate
Heat exchange；Compared with conventional shell-and-tube heat exchanger, in identical flow resistance and power consumption, heat transfer coefficient
It is higher by very much.
Different types of heat exchanger has respective merits and demerits, needs to carry out selection use according to the actual situation；Therefore
In embodiments of the present invention, the type of the First Heat Exchanger 2 and the second heat exchanger 3 is not construed as limiting.
Specifically, the Heat Exchanger in Refrigeration System gas circuit variable switching device is provided with recovery pipe, the recovery pipe
It is arranged on the pipeline between the second heat exchanger 3 and the second switching valve port 14, the solenoid valve 4 is arranged in the recovery pipe
On；In embodiments of the present invention, the solenoid valve 4 is normally closed type direct-acting electromagnetic valve, and the solenoid valve 4 is mainly by its inside
Solenoid controlled: when solenoid valve 4 is powered, electromagnetic coil generates electromagnetic force and closure member is lifted from valve seat, and valve is opened, electricity
Magnet valve 4 is in channel status；When solenoid valve 4 powers off, electromagnetic force disappears, and spring handle closure member is pressed on valve seat, and valve is closed, electricity
Magnet valve 4 is in off state.
The Heat Exchanger in Refrigeration System gas circuit variable switching device is provided with monodromy hot loop mode and double heat-exchanging loop moulds
Formula；It should be noted that in different modes, the working condition of the four-way valve 1 and solenoid valve 4 changes with the switching of mode
Become.
Fig. 2 be in the embodiment of the present invention Heat Exchanger in Refrigeration System gas circuit variable switching device under monodromy hot loop mode
Pneumatic diagram.
As shown in Fig. 2, when Heat Exchanger in Refrigeration System gas circuit variable switching device is monodromy hot loop mode, four-way valve 1
Electromagnetic valve coil no power, intake valve port 11 and the first switching valve port 12 connect, the gas refrigerant of compressor discharge
First Heat Exchanger 2 is flowed into after the intake valve port 11, first of four-way valve 1 switches valve port 12；The gas refrigerant is changed first
It is liquid refrigerant that condensation liquefaction exothermic conversion is carried out in hot device 2, because the heat transfer effect of heat exchanger is limited, through First Heat Exchanger 2
Gas refrigerant after heat exchange can only be partially converted into liquid refrigerant, and the gas-liquid mixed refrigerant is from First Heat Exchanger 2
Outlet outflow.
Under monodromy hot loop mode, intermediate valve port 13 is connected to the second switching valve port 14, and the second heat exchanger 3 is at this time
Idle state；Solenoid valve 4 is powered in recovery pipe at this time, and the valve of solenoid valve is opened, and solenoid valve 4 is in channel status, and second
The gas heat exchange medium and lubricating oil to leave unused in heat exchanger 3 is back in compressor through solenoid valve 4.
Fig. 3 be in the embodiment of the present invention Heat Exchanger in Refrigeration System gas circuit variable switching device under double heat-exchanging loop modes
Pneumatic diagram.
As shown in figure 3, when Heat Exchanger in Refrigeration System gas circuit variable switching device is double heat-exchanging loop modes, compressor row
Gas refrigerant out need to carry out secondary heat exchange in Heat Exchanger in Refrigeration System gas circuit variable switching device.In double heat-exchanging loop moulds
Under formula, the electromagnetic valve coil of the four-way valve 1 is powered, and the intake valve port 11 of four-way valve and the second switching valve port 14 are connected, and first
Switching valve port 12 is connected with intermediate valve port 13；Solenoid valve 4 powers off at this time, and the valve of solenoid valve is closed, and the recovery pipe is in
Off state.
The gas refrigerant of compressor discharge switches valve port 14 through the intake valve port 11, second of four-way valve 1 and flows into the
Two heat exchangers 3 carry out level-one heat exchange, and it is liquid system that the gas refrigerant, which carries out condensation liquefaction exothermic conversion in the second heat exchanger 3,
Cryogen, because the heat transfer effect of heat exchanger is limited, the gas refrigerant after the heat exchange of the second heat exchanger 3 can only be partially converted into liquid
Refrigerant, the gas-liquid mixed refrigerant are flowed out from the outlet of the second heat exchanger 3；The gas-liquid mixed refrigerant is after through centre
Valve port 13, first switches valve port 12 and flows into the progress secondary heat exchange of First Heat Exchanger 2, the gas system in the gas-liquid mixed refrigerant
Cryogen is liquid refrigerant in the further condensation liquefaction exothermic conversion of First Heat Exchanger 2, but the heat transfer effect of heat exchanger is limited, institute
Liquid refrigerant can not be fully converted to by stating gas refrigerant, and the gas-liquid mixed refrigerant is from the outlet of First Heat Exchanger 2
Outflow.
Double heat-exchanging loop modes are compared with monodromy hot loop mode, and the gas refrigerant of the compressor discharge is in double heat exchange
Secondary heat exchange has been carried out under circuit pattern, that is, has carried out time condensation liquidation exothermic reaction, therefore obtained gas-liquid mixed system
The content of gas refrigerant in cryogen is relatively low.
The embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device, the refrigeration system heat exchange
Device gas circuit variable switching device by the movement of four-way valve, can the gas-liquid content to the gas-liquid mixed refrigerant carry out variable control
System；Suitable for some particularity because of usage type, air quantity or water flow in heat exchanger must be fixedly arranged at the same of a range
When, but the refrigeration system for needing heat exchanging quantitative change amount to be controlled.
In addition, the embodiment of the invention also provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device composite module,
The Heat Exchanger in Refrigeration System gas circuit variable switching device composite module is switched by multiple Heat Exchanger in Refrigeration System gas circuit variables to be filled
Set and be composed, can gas-liquid content to the gas-liquid mixed refrigerant obtained after exchanging heat carry out more accurate Variable Control.
Fig. 4 is that the structure composition of Heat Exchanger in Refrigeration System gas circuit variable switching device composite module in the embodiment of the present invention is shown
It is intended to.
As shown in figure 4, the embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device combination dies
Block, the Heat Exchanger in Refrigeration System gas circuit variable switching device composite module are switched by four Heat Exchanger in Refrigeration System gas circuit variables
Device composition；It should be noted that in embodiments of the present invention to the quantity of Heat Exchanger in Refrigeration System gas circuit variable switching device
It is defined and is intended merely to be illustrated Heat Exchanger in Refrigeration System gas circuit variable switching device composite module, actual quantity is answered
It is limited depending on actual needs.
Wherein, four Heat Exchanger in Refrigeration System gas circuit variable switching device is all relatively independent, and four refrigeration systems are changed
The mode of hot device gas circuit variable switching device can carry out independent choice as needed.
Wherein, the public inlet end of each Heat Exchanger in Refrigeration System gas circuit variable switching device both is from same pipe
The outlet side on road, each Heat Exchanger in Refrigeration System gas circuit variable switching device converges at same pipeline；In addition, each refrigeration
Recovery pipe where the solenoid valve of system heat exchanger gas circuit variable switching device also converges at flow to pressure again after same pipeline
In contracting machine.
The embodiment of the invention provides a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device composite modules, by institute
State each Heat Exchanger in Refrigeration System gas circuit variable switching device in Heat Exchanger in Refrigeration System gas circuit variable switching device composite module
Control, it can be achieved that carrying out more accurate Variable Control to the gas-liquid content of the gas-liquid mixed refrigerant obtained after exchanging heat；More
Suitable for some particularity because of usage type, while air quantity or water flow in heat exchanger must be fixedly arranged at a range,
But the refrigeration system for needing heat exchanging quantitative change amount accurately to be controlled.
Fig. 5 is the stream of the control method of one of embodiment of the present invention Heat Exchanger in Refrigeration System gas circuit variable switching device
Journey schematic diagram.
As shown in figure 5, a kind of control method of Heat Exchanger in Refrigeration System gas circuit variable switching device, the control method packet
It includes:
S11: according to the demand of refrigeration system heat exchange amount, touch screen is controlled by refrigeration system and selects Heat Exchanger in Refrigeration System
The operating mode of gas circuit variable switching device.
Before refrigeration system starts running, the demand according to refrigeration system heat exchange amount is needed, is controlled and is touched by refrigeration system
Touch the operating mode of screen selection Heat Exchanger in Refrigeration System gas circuit variable switching device；Wherein, the Heat Exchanger in Refrigeration System gas circuit
Variable switching device provides two kinds of operating modes, respectively monodromy hot loop mode and double heat-exchanging loop modes.
Specifically, refrigeration system controls touch screen equipped with refrigeration system, the refrigeration system control touch screen is based on touching
Feel the operation of feedback system induction user；In addition, the refrigeration system control touch screen can be controlled according to the formula of preprogramming
The programmable logic controller (PLC) of refrigeration system.In specific implementation process of the present invention, user controls touch screen by refrigeration system
Monodromy hot loop mode or double heat-exchanging loop modes are selected, refrigeration system controls touch screen and sends phase according to the mode that user selects
The instruction answered is into programmable logic controller (PLC).
S21: by the solenoid valve in PLC controls Heat Exchanger in Refrigeration System gas circuit variable switching device,
Make solenoid valves.
When user, which controls touch screen by refrigeration system, selects monodromy hot loop mode, refrigeration system controls touch screen hair
Send corresponding instruction into programmable logic controller (PLC).It should be noted that programmable logic controller (PLC) (hereinafter referred to as PLC) is
One, using microprocessor as the electronic system device of the digital operation of core, aims at and applies and design in industry spot, it
Using programmable memory, logical operation, sequential control, timing/counting and arithmetic fortune are executed to store inside it
The operational orders such as calculation, and by digital or analog input, output interface, it controls various types of mechanical or produced
Journey；The programmable logic controller (PLC) is by five power supply, central processing unit, memory, input unit and output unit parts
Composition: power supply is used to convert alternating current to direct current required inside PLC, and current major part PLC is using switch-type stabilized electricity
Source power supply；Central processing unit is the control axis of PLC and the core component of PLC, and performance determines the performance of PLC, center
Processor is by controller, arithmetic unit and register group at these circuits are all concentrated on one chip, and address bus, control are passed through
Bus processed is connected with the input/output interface circuit of memory.The effect of central processing unit is to handle and run user program, into
Row logic and mathematical operation, control whole system are allowed to coordinate；Memory is the semiconductor circuit with memory function, its work
With being storage system program, user program, logical variable and some other information, wherein system program is that control PLC realizes each
The program of kind function, is write, and be cured in read-only memory (ROM), user cannot access by PLC manufacturer；Input is single
Member is the input interface that PLC is connected with controlled device, is the bridge that signal enters PLC, its effect, which is that reception is main, enables element, inspection
The signal that element transmits is surveyed, the type of input has direct current input, exchange input, alternating current-direct current input；Output unit is also PLC and quilt
The connecting component between equipment is controlled, its effect is that the output signal of PLC is sent to controlled device, i.e., send central processing unit
Weak electric signal out is converted into level signal, drives the executive component of controlled device, and the type of output has relay output, crystal
Pipe output, brilliant gate output；In specific implementation process of the present invention, refrigeration system control touch screen as input unit and
The type of output is relay output, and programmable logic controller (PLC) controls the instruction of touch screen according to refrigeration system, by corresponding
Relay the power on/off of four-way valve and solenoid valve in Heat Exchanger in Refrigeration System gas circuit variable switching device is controlled.
What it is when user's selection is monodromy hot loop mode, is needed at this time through PLC controls refrigeration system
Solenoid valve in heat exchanger gas circuit variable switching device, makes solenoid valves；Under monodromy hot loop mode, refrigeration system heat exchange
Four-way valve no power in device gas circuit variable switching device.
Fig. 6 is the output pin wiring schematic diagram of programmable logic controller (PLC) in the embodiment of the present invention, and Fig. 7 is implementation of the present invention
In example in Heat Exchanger in Refrigeration System gas circuit variable switching device solenoid valve working circuit diagram.
In specific implementation process of the present invention, the output type of the programmable logic controller (PLC) is relay output, i.e.,
The power on/off of solenoid valve is controlled by control relay.It should be noted that relay is a kind of electric control device, it is when defeated
When entering the variation of amount (energizing quantity) and reaching prescribed requirement, make controlled volume that scheduled Spline smoothing occur in electrical output circuit
A kind of electric appliance；It has control system (also known as input circuit) and is closed by the interaction between control system (also known as output loop)
System, is usually applied in automation control circuit；It is actually to go one kind of control high current running " automatic with low current
Switch ", therefore the effects of play automatic adjustment, safeguard protection, conversion circuit in circuit.
As shown in Figure 6 and Figure 7, first relay includes the first relay coil and the first relay normally open contact,
The interactive relationship of the two is as follows: when the first relay coil is powered, the first relay normally open contact closure；When the first relay
When coil blackout, the first relay normally open contact is disconnected.In addition, first relay coil connects in programmable logic controller (PLC)
One of output pin on (in specific implementation process of the present invention, the first relay coil is connect in programmable logic control
On device Y0 output pin processed), first relay normally open contact is connected in the electrical circuit where solenoid valve.
Specifically, when user selects monodromy hot loop mode on refrigeration system control touch screen, refrigeration system at this time
Control touch screen sends out monodromy heat pattern and instructs accordingly；After programmable logic controller (PLC) receives corresponding instruction, according to
The Y0 output pin circuit where the first relay coil is connected in instruction, and the first relay coil obtains electric at this time；First relay
Coil obtain it is electric after, the first relay normally open contact closure, connect solenoid valve where electrical circuit, solenoid valves movement.
S31: by the four-way valve in PLC controls Heat Exchanger in Refrigeration System gas circuit variable switching device,
Four-way valve is set to be powered.
What it is when user's selection is double heat-exchanging loop modes, is needed at this time through PLC controls refrigeration system
Four-way valve in heat exchanger gas circuit variable switching device, makes four-way valve be powered；Under double heat-exchanging loop modes, refrigeration system heat exchange
Solenoid valve no power in device gas circuit variable switching device.
Fig. 8 is the operating circuit of four-way valve in Heat Exchanger in Refrigeration System gas circuit variable switching device in the embodiment of the present invention
Figure.
As shown in Figure 6 and Figure 8, second relay includes the second relay coil and the second relay normally open contact,
The interactive relationship of the two is as follows: when the second relay coil is powered, the second relay normally open contact closure；When the second relay
When coil blackout, the second relay normally open contact is disconnected.In addition, second relay coil connects in programmable logic controller (PLC)
One of output pin on (in specific implementation process of the present invention, the first relay coil is connect in programmable logic control
On device Y1 output pin processed), second relay normally open contact is connected in the electrical circuit where four-way valve.
Specifically, when user selects double heat-exchanging loop modes on refrigeration system control touch screen, refrigeration system at this time
Control touch screen sends out double heat exchange modes and instructs accordingly；After programmable logic controller (PLC) receives corresponding instruction, according to
The Y1 output pin circuit where the second relay coil is connected in instruction, and the second relay coil obtains electric at this time；Second relay
Coil obtain it is electric after, the second relay normally open contact closure, connect four-way valve where electrical circuit, four-way valve energization movement.
The embodiment of the present invention provides a kind of control method of Heat Exchanger in Refrigeration System gas circuit variable switching device, in the control
In method processed, the refrigeration system control touch screen provides operation interface for user, and the Heat Exchanger in Refrigeration System gas circuit becomes
Amount switching device is provided with two modes of monodromy hot loop and double heat-exchanging loops, and user selects corresponding according to refrigeration system heat exchange amount
Mode；The programmable logic controller (PLC) of refrigeration system is arrived in the instruction that the refrigeration system control touch screen issues corresponding modes
In, programmable logic controller (PLC) is to controlling；The programmable logic controller (PLC) controls the finger of touch screen according to refrigeration system
It enables, by relay to two critical elements (four-way valve and solenoid valve) in Heat Exchanger in Refrigeration System gas circuit variable switching device
Power on/off is controlled；The four-way valve and solenoid valve carry out power on/off according to the selected mode, make Heat Exchanger in Refrigeration System gas
Road variable switching device operates normally.
In addition, be provided for the embodiments of the invention above a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device and its
Control method is described in detail, and should use specific case herein and be explained the principle of the present invention and embodiment
It states, the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile for this field
Those skilled in the art, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up institute
It states, the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device, which is characterized in that the Heat Exchanger in Refrigeration System gas circuit becomes
Measuring switching device includes four-way valve, First Heat Exchanger, the second heat exchanger and solenoid valve；Wherein, the intake valve of the four-way valve
Mouth is connect with gas source, and the first switching valve port of four-way valve is connect with First Heat Exchanger, the second switching valve port and second of four-way valve
One end of heat exchanger connects, and the other end of the second heat exchanger and the intermediate valve port of four-way valve connect；
The Heat Exchanger in Refrigeration System gas circuit variable switching device is provided with recovery pipe, and the recovery pipe setting is changed second
On pipeline between hot device and the second switching valve port, the solenoid valve is arranged in the recovery pipe.
2. Heat Exchanger in Refrigeration System gas circuit variable switching device according to claim 1, which is characterized in that the refrigeration system
System heat exchanger gas circuit variable switching device is optionally provided with two kinds of operating modes, respectively monodromy heat pattern and double heat exchange moulds
Formula.
3. Heat Exchanger in Refrigeration System gas circuit variable switching device according to claim 2, which is characterized in that in monodromy hot-die
Under formula, the four-way valve is failure to actuate, and the intake valve port of the four-way valve is connected to the first switching valve port；The gas of gas source is through four-way
The intake valve port of valve, the first switching valve port flow into First Heat Exchanger and exchange heat, and the gas-liquid mixture obtained after heat exchange is from first
It flows out the outlet of heat exchanger；
Second heat exchanger is in idle state, and the solenoid valve in the recovery pipe is in the open state.
4. Heat Exchanger in Refrigeration System gas circuit variable switching device according to claim 2, which is characterized in that in double heat exchange moulds
Under formula, the four-way valve events, the intake valve port of the four-way valve is connected to the second switching valve port, the electricity in the recovery pipe
Magnet valve is in closed state；
Intake valve port, second switching valve port of the gas of gas source through four-way valve flow into the second heat exchanger and carry out level-one heat exchange；It is described
The intermediate valve port of four-way valve is connected to the first switching valve port, obtains gas-liquid mixture from the second heat exchanger after level-one exchanges heat
Outlet outflow, intermediate valve port, the first switching valve port through four-way valve flow into First Heat Exchanger and carry out secondary heat exchange, through secondary heat exchange
The gas-liquid mixture obtained afterwards is flowed out from the outlet of First Heat Exchanger.
5. a kind of Heat Exchanger in Refrigeration System gas circuit variable switching device composite module, which is characterized in that the refrigeration system heat exchange
Device gas circuit variable switching device composite module is as multiple Heat Exchanger in Refrigeration System gas as described in Claims 1-4 any one
Road variable switching device composition.
6. a kind of control based on the Heat Exchanger in Refrigeration System gas circuit variable switching device as described in claim 1 to 5 any one
Method processed, which is characterized in that the control method includes:
According to the demand of refrigeration system heat exchange amount, touch screen is controlled by refrigeration system and selects Heat Exchanger in Refrigeration System gas circuit variable
The operating mode of switching device；
By the solenoid valve in PLC controls Heat Exchanger in Refrigeration System gas circuit variable switching device, make solenoid valve
It is powered；Or
By the four-way valve in PLC controls Heat Exchanger in Refrigeration System gas circuit variable switching device, make four-way valve
It is powered.
7. control method according to claim 6, which is characterized in that described to control touch screen selection system by refrigeration system
The operating mode of cooling system heat exchanger gas circuit variable switching device, comprising:
Touch screen, which is controlled, by refrigeration system selects monodromy hot loop mode or double heat-exchanging loop modes；
The refrigeration system control touch screen issues corresponding instruction into programmable logic controller (PLC) according to the selected mode.
8. control method according to claim 7, which is characterized in that the output type of the programmable logic controller (PLC) is
Relay output, the power on/off of solenoid valve is controlled by the first relay of control, controls four by the second relay of control
The power on/off of port valve；
First relay includes the first relay coil and the first relay normally open contact, and first relay coil connects
On the output pin of programmable controller, first relay normally open contact is connected in the electrical circuit where solenoid valve；
Second relay includes the second relay coil and the second relay normally open contact, and second relay coil connects
On the output pin of programmable controller, second relay normally open contact is connected in the electrical circuit where solenoid valve.
9. control method according to claim 8, which is characterized in that described to be freezed by PLC controls
Solenoid valve in system heat exchanger gas circuit variable switching device, makes solenoid valves, comprising:
When controlling touch screen selection monodromy hot loop mode by refrigeration system, the refrigeration system control touch screen issues monodromy
Heat pattern instructs in programmable logic controller (PLC) accordingly；
Programmable logic controller (PLC) connects the output pin circuit where the first relay coil, the first relay according to instruction
Coil obtain it is electric, the first relay normally open contact closure, connect the electrical circuit of solenoid valve, solenoid valve obtains electric.
10. control method according to claim 8, which is characterized in that described by PLC controls system
Four-way valve in cooling system heat exchanger gas circuit variable switching device, makes four-way valve be powered, comprising:
When controlling touch screen selection pair heat-exchanging loop mode by refrigeration system, the refrigeration system control touch screen issues double changes
Heat pattern instructs in programmable logic controller (PLC) accordingly；
Programmable logic controller (PLC) connects the output pin circuit where the second relay coil, the second relay according to instruction
Coil obtain it is electric, the second relay normally open contact closure, connect the electrical circuit of four-way valve, four-way valve obtains electric.
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Cited By (1)
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| CN112631345A (en) * | 2019-10-08 | 2021-04-09 | 芜湖美的厨卫电器制造有限公司 | Water temperature control device and method and wall-mounted boiler |
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