CN109579356A - A kind of temperature control multi-connected machine heat pump system and control method with heat recovery function - Google Patents
A kind of temperature control multi-connected machine heat pump system and control method with heat recovery function Download PDFInfo
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- CN109579356A CN109579356A CN201811573057.5A CN201811573057A CN109579356A CN 109579356 A CN109579356 A CN 109579356A CN 201811573057 A CN201811573057 A CN 201811573057A CN 109579356 A CN109579356 A CN 109579356A
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- solenoid valve
- temperature
- valve
- heat pump
- interface
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Classifications
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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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
A kind of temperature control multi-connected machine heat pump system and control method with heat recovery function provided by the present invention, including multi-connected machine heat pump refrigeration system and water tank, first solenoid valve, second solenoid valve, third solenoid valve, 4th solenoid valve, 5th solenoid valve and the 6th solenoid valve, electric-controlled box and the first electric expansion valve, above-mentioned component constitutes the heat pump heat recovery module and auxiliary heat-exchanging module of system, by the way that multiple solenoid valves are arranged to replace on-off into different refrigerant flows, the heat in heat pump refrigerating is not only realized into recuperation of heat effective for heating water, it also solves current multi-connected machine heat pump system together and is difficult to control raising liquid pipe degree of supercooling, compressor return air make a slip of the tongue temperature and reduce electronic control module temperature problem.
Description
Technical field
The present invention relates to the technical fields of heat pump system, refer in particular to a kind of temperature control multi-connected machine heat with heat recovery function
Pumping system and control method.
Background technique
Multi-connected machine heat pump system since its flexible control method and simple mounting means are widely used by people, but
In its independent cooling, since the heating capacity in whole process is directly by being placed in outdoor outdoor unit row outwardly, in this way, not
The energy consumption of outdoor fan is increased only, the heat for also generating refrigeration is expelled directly out to cause energy waste, in addition, multi-connected machine system
System electronic control module temperature height then limits the use scope of compressor, and the electronic control module of major part multi-line system leans on blower at present
Or refrigerant is cooling to cool down to module, this mode be exactly heat transfer into system, and in gas-liquid separator due to
Overheat of compressor degree is insufficient, and the generally outer machine condenser of multi-connected machine degree of supercooling is subcooled, Yao Tigao degree of supercooling then need waste compared with
More condenser areas causes more cost to outer machine, if in addition, compressor return air temperature is lower easily at low temperatures
Compressor is caused to return liquid phenomenon, it is common practice that give compressor electric heating, not only waste of energy, also causes heat pump system efficiency
It is low, refrigeration effect be deteriorated the problems such as.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of temperature control multi-connected machine with heat recovery function
Heat pump system and control method.
In order to achieve the above purpose, a kind of temperature control multi-connected machine heat pump system with heat recovery function provided by the present invention
System, including evaporator, condenser, the first frequency-changeable compressor, the second frequency-changeable compressor, four-way valve, multi-joint indoor units, outdoor change
Hot device, subcooler, gas-liquid separator, wherein in the evaporator setting can heat exchange first flow path and second flow path；It is described
Four-way valve includes tetra- interfaces of A, B, C, D, and the subcooler includes tetra- interfaces of E, F, G, H, second frequency-changeable compressor
One end of output end and outdoor heat exchanger is communicated with the interface A of four-way valve and interface B respectively, the other end of the outdoor heat exchanger
And one end of multi-joint indoor units is communicated with the interface E of subcooler and interface F respectively, interface D and interface C points of the four-way valve
It is not communicated with the other end of multi-joint indoor units and gas-liquid separator, the input of the gas-liquid separator and the second frequency-changeable compressor
End communicates, further include have water tank, the first solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve and
6th solenoid valve, electric-controlled box and the first electric expansion valve, wherein be equipped with the first heat exchanger tube and described in the inside of the electric-controlled box
The outer interface G and gas-liquid separator to connect subcooler of electric-controlled box, the outside of the water tank are stretched out in first heat exchanger tube both ends respectively
Delivery outlet and the input port of water tank are separately connected by the second heat exchanger tube being preset with, and second heat exchanger tube circulates through
Condenser, the both ends of first solenoid valve are communicated with the interface A of the output end of the second frequency-changeable compressor and four-way valve respectively；On
It states component and constitutes the heat pump heat recovery module and auxiliary heat-exchanging module of system；
The composition of the heat pump heat recovery module connects: one end phase of the output end of first frequency-changeable compressor and condenser
Logical, the first flow path both ends of the evaporator are communicated with the input terminal of the first frequency-changeable compressor and condenser respectively, the evaporation
The second flow path both ends of device are communicated with third solenoid valve and second solenoid valve respectively, and the second solenoid valve and the second frequency conversion are compressed
Machine output end communicates, and the third solenoid valve is communicated with the interface A of four-way valve；
The composition of the auxiliary heat-exchanging module connects: the 4th solenoid valve is located at the interface A of third solenoid valve and four-way valve
Between, the both ends of first electric expansion valve are communicated with the interface H of third solenoid valve and subcooler respectively, and the two of the electric-controlled box
End communicated respectively with the interface G and gas-liquid separator of subcooler, the both ends of the 6th solenoid valve respectively with third solenoid valve and
Electric-controlled box communicates, and the 5th solenoid valve is communicated with the interface A and electric-controlled box of four-way valve respectively, gas-liquid separator and the 5th solenoid valve phase
It is logical.
It further, further include oil eliminator, wherein one end of the oil eliminator is defeated with second frequency-changeable compressor
Exit port communicates, and the other end of the oil eliminator is communicated with the first solenoid valve and second solenoid valve respectively.
Further, the second electric expansion valve is equipped between the condenser and the evaporator.
Further, third electric expansion valve is equipped between the interface E and outdoor heat exchanger of the subcooler.
Further, primary low sensor is equipped between the second frequency-changeable compressor input terminal and gas-liquid separator.
Further, further include the coolant-temperature gage detector for having in water tank and being used for real-time monitoring water temperature, be set to electric-controlled box
Inside is used for real for the automatically controlled temperature detector of real-time monitoring electric-controlled box internal element temperature and inside gas-liquid separator
When monitor gas-liquid separator internal temperature vapor-liquid temperature detector.
A kind of control method of the temperature control multi-connected machine heat pump system with heat recovery function, defines the coolant-temperature gage detector
Real-time monitoring water temperature is real time temperature T1, and required water temperature is set temperature T1s, the automatically controlled temperature detector real-time monitoring electricity
Control box internal temperature is real time temperature T2, sets controlled electric-controlled box internal temperature as T2s, the vapor-liquid temperature detector is real
When monitoring gas-liquid separator internal temperature be real time temperature T3, low-pressure temperature correspond at primary low sensor as Tpe, system according to
Compared with size between real time temperature T1 and set temperature T1s, corresponding starting or the first frequency-changeable compressor of closing are to start
Or close heat pump heat recovery module；Compared with the size between real time temperature T2 and set temperature T2s, real time temperature T3 with it is low
Size between pressure temperature Tpe compares, corresponding the 4th solenoid valve controlled in auxiliary heat-exchanging module, the 5th solenoid valve, the 6th electricity
The opening and closing of magnet valve and the aperture for adjusting the first electric expansion valve；
If set temperature T1s is greater than real time temperature T1, the first solenoid valve is closed, opens second solenoid valve and third solenoid valve,
System starts the first frequency-changeable compressor, and heat pump heat recovery module starts to heat work, until set temperature T1s is less than or equal in fact
Shi Wendu T1 closes the first solenoid valve, opens second solenoid valve and third solenoid valve, and system stops starting the first frequency conversion compression
Machine, heat pump heat recovery module stop heating work；
If real time temperature T2 is greater than set temperature T2s and adds Y value at this time, the first solenoid valve and the 4th solenoid valve are closed, opens second
Solenoid valve and third solenoid valve adjust the first electronic expansion valve opening；Until real time temperature T2 is less than or equal to a certain setting temperature
Degree T2s adds X value, opens the 6th solenoid valve；
If the difference between real time temperature T3 and low-pressure temperature Tpe is less than or equal to setting value Z, the first solenoid valve, the 4th electricity are closed
Magnet valve and the 5th solenoid valve open second solenoid valve, third solenoid valve；Until difference between real time temperature T3 and low-pressure temperature Tpe
When greater than a certain setting value T, the first solenoid valve, the 4th solenoid valve are closed, opens second solenoid valve, third solenoid valve and the 5th electricity
Magnet valve.
Further, add Y value greater than set temperature T2s as real time temperature T2 and be less than or equal to set temperature T2s and add X value
When, add X value to be gradually reduced with set temperature T2s in system operation, set temperature T2s adds Y value to be gradually reduced, first electricity
The valve body aperture and detection time of sub- expansion valve close the 4th electromagnetism when X value is negative value with Y value in variation of successively decreasing step by step
Valve, the valve body aperture of first electric expansion valve are negative value.
Further, in system operation, if the difference between real time temperature T3 and low-pressure temperature Tpe is greater than the set value T and is less than
When setting value Z, as setting value T and setting value Z are gradually increased, the valve body folding time of the 5th solenoid valve is in be incremented by step by step
Variation.
Further, in system operation, set temperature T1s is less than or equal to real time temperature T1, and real time temperature T2 is less than or waits
Add X value in a certain set temperature T2s, when difference is greater than a certain setting value T between real time temperature T3 and preset temperature Tpe, closes the
One solenoid valve and the 4th solenoid valve open second solenoid valve, third solenoid valve, the 5th solenoid valve and the 6th solenoid valve.
The present invention uses above-mentioned scheme, the beneficial effect is that: the present invention is by between hot-water heating system and heat pump system
Multiple solenoid valves are set with alternately on-off at different refrigerant flows, not only by the heat in heat pump refrigerating effective for heating water
Realize recuperation of heat, also by associated adjustment valve with combine multi-connected machine heat recovery and multi-line system with to high temperature electronic control module into
Row cooling, promoted heat pump system degree of supercooling and promoted the degree of superheat, solve together current multi-connected machine heat pump system be difficult to control mention
High liquid pipe degree of supercooling, compressor return air make a slip of the tongue and temperature and reduce electronic control module temperature problem, and there is energy saving, structure simply may be used
The advantages that leaning on, maintaining easily.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is coolant-temperature gage detector control flow chart of the invention.
Fig. 3 is vapor-liquid temperature detection part control flow chart of the invention.
Fig. 4 is automatically controlled temperature detection part control flow chart of the invention.
Wherein, the first solenoid valve of 1-, 2- second solenoid valve, 3- third solenoid valve, the 4th solenoid valve of 4-, the 5th electromagnetism of 5-
Valve, 6- gas-liquid separator, 61- vapor-liquid temperature detector, 7- subcooler, 8- electric-controlled box, the automatically controlled temperature detector of 81-, 82- first
Heat exchanger tube, the first electric expansion valve of 9-, 10- primary low sensor, the first frequency-changeable compressor of 11-, the 6th solenoid valve of 12-, 13- water
Case, 131- coolant-temperature gage detector, the second heat exchanger tube of 132-, 14- water pump, 15- condenser, 16- evaporator, the second electronics of 17- are swollen
Swollen valve, 18- pair high pressure sensor, 19- secondary depression sensor, 20- four-way valve, 21- outdoor heat exchanger, 22- third electronic expansion
Valve, 23- indoor heat exchanger, the second frequency-changeable compressor of 24-, 25- oil eliminator.
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 the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Referring to attached drawing 1, in the present embodiment, a kind of temperature control multi-connected machine heat pump system with heat recovery function is main to wrap
Include evaporator 16, condenser 15, the first frequency-changeable compressor 11, the second frequency-changeable compressor 24, four-way valve 20, oil eliminator 25, more
Join indoor units, outdoor heat exchanger 21, subcooler 7, gas-liquid separator 6, water tank 13, the first solenoid valve 1, second solenoid valve 2, the
Three solenoid valves 3, the 4th solenoid valve 4, the 5th solenoid valve 5 and the 6th solenoid valve 12, electric-controlled box 8 and the first electric expansion valve 9,
In, be provided in the evaporator 16 can heat exchange first flow path and second flow path, the four-way valve 20 include A, B, C, D tetra-
A interface, the subcooler 7 include tetra- interfaces of E, F, G, H, and multi-joint indoor units are connected in parallel by multiple indoor heat exchangers 23
(in the present embodiment the number of indoor heat exchanger 23 be three, in addition, 23 number of indoor heat exchanger can according to actual needs and
It is fixed), specifically, 24 output end of the second frequency-changeable compressor is communicated with the interface A of four-way valve 20, oil eliminator 25 is set to the second frequency conversion
Between compressor 24 and four-way valve 20, that is, the output end and four-way with the second frequency-changeable compressor 24 respectively of the both ends of oil eliminator 25
The interface A of valve 20 is connected, the both ends of outdoor heat exchanger 21 respectively with the interface B of four-way valve 20 and any indoor heat exchanger 23
One end communicate, wherein subcooler 7 be set between outdoor heat exchanger 21 and any indoor heat exchanger 23, the interface of the subcooler 7
E and interface F are communicated with one end of one end of outdoor heat exchanger 21 and any indoor heat exchanger 23 respectively, further, outdoor heat exchange
Third electric expansion valve 22 is equipped between device 21 and the interface E of subcooler 7, by the way that the aperture of electric expansion valve is arranged to supercooling
Degree be adjusted to the refrigerant in pipeline carry out decompression cooling (subcooler 7 and electric expansion valve are component commonly used in the art,
Technical staff can be known by the relevant technologies handbook, not repeat herein its principle), any indoor heat exchanger 23 it is another
End communicated with the interface D of four-way valve 20, in addition, the both ends of gas-liquid separator 6 respectively with the interface C of four-way valve 20 and the second frequency conversion
The input terminal of compressor 24 communicates, and further, primary low is equipped between gas-liquid separator 6 and the input terminal of the second frequency-changeable compressor 24
Sensor 10, in addition, in the present embodiment, 1 both ends of the first solenoid valve respectively with 24 output end of the second frequency-changeable compressor and four-way
The interface A of valve 20 is communicated (since oil eliminator 25 is between the second frequency-changeable compressor 24 and four-way valve 20, that is, the first solenoid valve 1
Both ends are communicated with the interface A of oil eliminator 25 and four-way valve 20 respectively), by the opening and closing of the first solenoid valve 1 with control connection or
Block whether the refrigerant through 24 output end of the second frequency-changeable compressor enters at the interface A of four-way valve 20；In addition, in the present embodiment
In, the outside of water tank 13 passes through delivery outlet and input port that the second heat exchanger tube 132 being preset with is separately connected water tank 13, the water
13 equipped at outlet port of case is provided with water pump 14, wherein circulates through condenser 15 the second heat exchanger tube more than 132 times, passing through water pump 14 will
Water in water tank 13 is extracted to the second heat exchanger tube 132, and is flow back into water tank 13 after heating in condenser 15 to obtain institute
Need hot water, the inside of the electric-controlled box 8 be equipped with the first heat exchanger tube 82 and 82 both ends of the first heat exchanger tube stretch out respectively it is automatically controlled
The outer interface G and gas-liquid separator 6 to be connected to subcooler 7 of box 8, so that the refrigerant through subcooler 7 can pass through the first heat exchanger tube 82
It exchanges heat with 8 internal element of electric-controlled box, to reduce by 8 internal element temperature of electric-controlled box, above-mentioned component constitutes the heat pump of system
Heat recovery module and auxiliary heat-exchanging module.
In the present embodiment, heat pump heat recovery module forms are as follows: the output end and condenser 15 of the first frequency-changeable compressor 11
One end communicate, the first flow path both ends of evaporator 16 respectively with 15 phase of the input terminal of the first frequency-changeable compressor 11 and condenser
Logical, the second flow path both ends of evaporator 16 are communicated with third solenoid valve 3 and second solenoid valve 2 respectively, wherein second electromagnetism
Valve 2 communicated with 24 output end of the second frequency-changeable compressor (since oil eliminator 25 is communicated with 24 output end of the second frequency-changeable compressor,
That is, actually second solenoid valve 2 is communicated with oil eliminator 25), third solenoid valve 3 is communicated with the interface A of four-way valve 20；Into one
Step is equipped with secondary high pressure sensor 18, evaporator in the present embodiment, between the output end and condenser 15 of the first frequency-changeable compressor 11
The second electric expansion valve 17,16 first flow path of evaporator and the first frequency-changeable compressor 11 are equipped between 16 first flow path and condenser 15
Input terminal between be equipped with secondary depression sensor 19.
Further, in the present embodiment, auxiliary heat-exchanging module composition connection are as follows: distinguish at the both ends of the 4th solenoid valve 4
Communicated with the interface A of third solenoid valve 3 and four-way valve 20, the both ends of the first electric expansion valve 9 respectively with third solenoid valve 3 and mistake
The interface H of cooler 7 is communicated, the both ends of the electric-controlled box 8 by the first heat exchanger tube 82 respectively with the interface G and gas-liquid of subcooler 7
Separator 6 communicates, and the both ends of the 6th solenoid valve 12 are communicated with third solenoid valve 3 and electric-controlled box 8 respectively, the 5th solenoid valve 5 difference
It is communicated with the interface A of four-way valve 20 and electric-controlled box 8, gas-liquid separator 6 is communicated with the 5th solenoid valve 5.
In addition, further including thering is the coolant-temperature gage in water tank 13 and for real-time monitoring water temperature to detect in the present embodiment
Device 131 is used for the automatically controlled temperature detector 81 of 8 internal element temperature of real-time monitoring electric-controlled box and is set to inside electric-controlled box 8
The vapor-liquid temperature detector 61 of 6 internal temperature of real-time monitoring gas-liquid separator is used for inside gas-liquid separator 6, wherein define institute
Stating 131 real-time monitoring water temperature of coolant-temperature gage detector is real time temperature T1, and required water temperature is set temperature T1s, the electric control temperature
Degree 81 real-time monitoring electric-controlled box of detector, 8 internal temperature be real time temperature T2, set controlled 8 internal temperature of electric-controlled box as
T2s, 61 real-time monitoring gas-liquid separator of vapor-liquid temperature detector, 6 internal temperature are real time temperature T3, primary low sensor
It is that Tpe(Tpe value is calculated according to refrigerant through Pe value at primary low sensor 10 that low-pressure temperature is corresponded at 10), system is according to reality
Compared with size between Shi Wendu T1 and set temperature T1s, corresponding starting or the first frequency-changeable compressor of closing 11 are to start
Or close heat pump heat recovery module；Compared with according to the size between real time temperature T2 and set temperature T2s, real time temperature T3 with it is low
Size between pressure temperature Tpe compares, corresponding the 4th solenoid valve 4 controlled in auxiliary heat-exchanging module, the 5th solenoid valve 5 and the 6th
The opening and closing of solenoid valve 12 and the aperture for adjusting the first electric expansion valve 9；For the understanding convenient for technical staff to the present embodiment, below
The present embodiment is illustrated in conjunction with specific example:
As shown in Figs 1-4, system brings into operation, wherein if coolant-temperature gage detector 131 detects that set temperature T1s is greater than in real time
When temperature T1, system starts the first frequency-changeable compressor 11, and heat pump heat recovery module starts to heat work；The first solenoid valve 1 is closed,
Second solenoid valve 2 and third solenoid valve 3 are opened, at this point, being in the refrigerant mistake of high temperature and pressure through 11 output end of the first frequency-changeable compressor
Secondary high pressure sensor 18 simultaneously flows to condenser 15 and carries out condensation heat release, that is, to following in the second heat exchanger tube 132 in condenser 15
Ring water is heated, and recirculated water flows back into water tank 13 through water pump 14 to reach heating water purpose, while refrigerant is through condenser 15
It is condensed into liquid afterwards and the first flow path evaporation for flowing to evaporator 16 after 17 reducing pressure by regulating flow of the second electric expansion valve is cold in gaseous state
Secondary depression sensor 19 is crossed after matchmaker and flow to 11 input terminal of the first frequency-changeable compressor, is recycled with this, and through the second frequency-changeable compressor
24 output ends flow to second solenoid valve 2 and the second flow path through evaporator 16 in the refrigerant of high temperature and pressure after oil eliminator 25,
The refrigerant of high temperature and pressure carries out heat exchange with the refrigerant through 16 first flow path of evaporator in the second flow path of evaporator 16 at this time,
The heat through 16 second flow path refrigerant of evaporator is absorbed using the refrigerant in 16 first flow path of evaporator, to improve heat pump
The refrigerant degree of superheat and reduction compression ratio of heat recovery module refrigerant circulation and the first frequency-changeable compressor 11, and then improve first
11 heating capacity of frequency-changeable compressor and Energy Efficiency Ratio, refrigerant flow to third solenoid valve 3 from the second flow path of evaporator 16；
If set temperature T1s is less than or equal to real time temperature T1, the first solenoid valve 1 is closed, opens second solenoid valve 2 and third electricity
Magnet valve 3, system stop the first frequency-changeable compressor 11 of starting, and heat pump heat recovery module stops heating work；Then the in system operation
Two frequency-changeable compressors, 24 output end flow to second solenoid valve 2 and through evaporator 16 in the refrigerant of high temperature and pressure after oil eliminator 25
Second flow path, then refrigerant flow to third solenoid valve 3 from the second flow path of evaporator 16；
At this point, if 81 real time temperature T2 of automatically controlled temperature detector is greater than set temperature T2s and adds Y value, the first solenoid valve 1 and the are closed
Four solenoid valves 4 open second solenoid valve 2 and third solenoid valve 3, adjust 9 aperture of the first electric expansion valve；Wherein, in this implementation
In example, if Y value is 10, that is,, can be related by opening at this time since 8 internal temperature of electric-controlled box is larger as T2 > T2s+10 DEG C
Restricting element is closed the first solenoid valve 1 and the 4th solenoid valve 4, is opened so that system refrigerant is flow to inside electric-controlled box 8 cools down
Second solenoid valve 2, third solenoid valve 3 and adjusting 9 aperture of the first electric expansion valve, and 9 valve body of the first electric expansion valve is opened at this time
Degree is maximum；Refrigerant refrigerant after third solenoid valve 3 divides two-way, wherein refrigerant carries out condensation heat release by outdoor heat exchanger 21 all the way
It is crossed after third electric expansion valve 22 afterwards after the interface E and interface F that flow through subcooler 7 and flows to any indoor heat exchanger 23 and be evaporated
Refrigeration, then refrigerant crosses the interface D and interface C of four-way valve 20 and flows into the by crossing primary low sensor 10 after gas-liquid separator 6
Two frequency-changeable compressors, 24 input terminal, another way refrigerant flow to the interface H through subcooler 7 after passing through the first electric expansion valve 9 and connect
Electric-controlled box 8(, which is flowed to, after mouthful G supercooling passes through the first heat exchanger tube 82) it is internal with to carrying out cooling and heat dissipation inside electric-controlled box 8；Wherein, cold
Matchmaker flows to gas-liquid separator 6 after electric-controlled box 8 and flows to the input terminal of the second frequency-changeable compressor 24 through primary low sensor 10；Into
One step, when real time temperature T2, which is greater than set temperature T2s, to be added Y value and add X value less than or equal to set temperature T2s, system operation
In add X value to be gradually reduced with set temperature T2s, set temperature T2s adds Y value to be gradually reduced, first electric expansion valve 9
Valve body aperture and detection time are in variation of successively decreasing step by step, specifically, in the present embodiment, as T2s+5 DEG C of < T2≤T2s+10 DEG C
When, 9 valve body of the first electric expansion valve+16P on the basis of original at this time, and detection in every 20 seconds is primary；When T2s+1 DEG C of < T2≤
At T2s+5 DEG C, 9 valve body of the first electric expansion valve+8P on the basis of original at this time, and detection in 10 seconds is primary；As T2s-1 DEG C of < T2
≤ T2s+1 DEG C when, 9 valve body aperture of the first electric expansion valve remains unchanged at this time, until when X value and Y value are negative value, the first electricity
Sub- 9 valve body aperture of expansion valve is negative value, and in the present embodiment, as T2s-4 DEG C of < T2≤T2s-1 DEG C, the first electronics is swollen at this time
Swollen 9 valve body of valve -8P on the basis of original, and detection in 10 seconds is primary；System is according to 8 real time temperature T2 of electric-controlled box and preset temperature
Variation and the corresponding valve body aperture for adjusting the first electric expansion valve 9 and adjustment detection time between T2s and difference, thus according to electricity
The different temperatures inside box 8 is controlled by adjusting valve body aperture flexibly to 8 internal cooling of electric-controlled box；Until real time temperature T2 is less than
Or add X value equal to a certain set temperature T2s, the 4th solenoid valve 4 is closed, the 6th solenoid valve 12 is opened and works as T2 in the present embodiment
≤ T2s-4 DEG C when, since 8 internal temperature of electric-controlled box is lower at this time, it is no longer necessary to which excessive refrigerant reduces by 8 inside temperature of electric-controlled box
Degree can reduce the flow that refrigerant flows into electric-controlled box 8 by increasing refrigerant branch, therefore close the 4th solenoid valve 4, open the 6th
Solenoid valve 12, the refrigerant after third solenoid valve 3 is divided into three parts at this time, a part of refrigerant successively pass through outdoor heat exchanger 21,
Third electric expansion valve 22, the interface E of subcooler 7 and interface F, indoor heat exchanger 23, four-way valve 20, gas-liquid separator 6, master are low
10 to the second frequency-changeable compressor of pressure sensor, 24 input terminal, another part refrigerant is successively through the first electric expansion valve 9, subcooler 7
Interface H and interface G, electric-controlled box 8, gas-liquid separator 6,10 to the second frequency-changeable compressor of primary low sensor, 24 input terminal, remain
The refrigerant of remaining part point successively flows to gas-liquid separator 6 through the 6th solenoid valve 12 and then crosses 10 to the second frequency conversion pressure of primary low sensor
24 input terminal of contracting machine.
Meanwhile if the difference measured in gas-liquid separator 6 between real time temperature T3 and low-pressure temperature Tpe at this time is less than or equal to set
When definite value Z, the first solenoid valve 1, the 4th solenoid valve 4 and the 5th solenoid valve 5 are closed, opens second solenoid valve 2, third solenoid valve 3；
Specifically, in the present embodiment, setting value Z is -2, that is, when T3-TPe≤- 2 DEG C, shows refrigerant at gas-liquid separator 6 at this time
Temperature is lower, and the second frequency-changeable compressor 24 is easily made to generate back liquid phenomenon, by closing the first solenoid valve 1, the 4th solenoid valve 4 and the
Five solenoid valves 5 open second solenoid valve 2 and third solenoid valve 3, then refrigerant flow electromagnetism to related above-mentioned T2 and T2s relationship
It is identical to increase the cold medium flux through gas-liquid separator 6 to improve at gas-liquid separator 6 that valve and electric expansion valve open situation
Refrigerant temperature, if the difference between real time temperature T3 and low-pressure temperature Tpe is greater than the set value T and is less than setting value Z, with setting
Value T is gradually increased with setting value Z, and the valve body of the 5th solenoid valve 5 opens and closes the time in incremental variations step by step, specifically, at this
In embodiment, when -2 DEG C 2 DEG C of < T3-TPe <, the first solenoid valve 1, the 4th solenoid valve 4 are closed, opens second solenoid valve 2, the
Three solenoid valves 3 and the 5th solenoid valve 5, and the 5th solenoid valve 5 is opened 5 seconds and is closed 15 seconds；When 2 DEG C 5 DEG C of < T3-TPe <, first is closed
Solenoid valve 1, the 4th solenoid valve 4 open second solenoid valve 2, third solenoid valve 3 and the 5th solenoid valve 5, and the 5th solenoid valve 5 is opened
It closes 10 seconds within 10 seconds；Until closing the first solenoid valve when difference is greater than a certain setting value T between real time temperature T3 and low-pressure temperature Tpe
1, the 4th solenoid valve 4 opens second solenoid valve 2, third solenoid valve 3 and the 5th solenoid valve 5；Wherein, in the present embodiment, when 5
When DEG C < T3-TPe, to prevent 24 suction temperature of the second frequency-changeable compressor excessively high, at this point, closing the first solenoid valve 1, the 4th electromagnetism
Valve 4, opening second solenoid valve 2, third solenoid valve 3 and the 5th solenoid valve 5 due to the unlatching of the 5th solenoid valve 5 made electric-controlled box
Refrigerant inside 8 divides two-way, wherein flowing to gas-liquid separator 6 all the way eventually flows to 24 input terminal of the second frequency-changeable compressor, it is another
The 5th solenoid valve 5 is passed by, the refrigerant for then crossing the 5th solenoid valve 5 is divided into two parts, and a portion refrigerant flows to gas-liquid separation
Device 6, another part refrigerant flow to the interface A of four-way valve 20, flow into gas-liquid point by the opening and closing of the 5th solenoid valve 5 to adjust refrigerant
In a certain range, further, in system operation, setting is warm for degree of supercooling to maintain in gas-liquid separator 6 for flow from device 6
It spends T1s and is less than or equal to real time temperature T1, real time temperature T2 is less than or equal to a certain set temperature T2s and adds X value, real time temperature T3
When difference is greater than a certain setting value T between preset temperature Tpe, the first solenoid valve 1 and the 4th solenoid valve 4 are closed, opens the second electricity
Magnet valve 2, third solenoid valve 3, the 5th solenoid valve 5 and the 6th solenoid valve 12, in the present embodiment, as T1 >=setting value T1s and T2
≤ T2s-4 DEG C and 5 DEG C of < T3-TPe when, since 8 internal temperature of electric-controlled box is lower at this time and 6 degree of supercooling of gas-liquid separator is higher,
The first solenoid valve 1 and the 4th solenoid valve 4 are closed, second solenoid valve 2, third solenoid valve 3, the 5th solenoid valve 5, the 6th electromagnetism are opened
Valve 12 and the first electric expansion valve 9 make refrigerant pass through related valve body and restricting element with dynamic regulation electric-controlled box 8 and gas-liquid separation
6 internal temperature of device, it is sectional-regulated to the progress of system throttles element according to 8 temperature of electric-controlled box and 6 temperature of gas-liquid separator, thus
Under the premise of guaranteeing 24 reliability service of the second frequency-changeable compressor, the aperture because of restricting elements such as electric expansion valves is effectively prevent not conform to
System capability caused by managing is deteriorated, the problems such as bias current, noise occurs, in addition, the present invention is combining current multi-connected machine heat recovery
With multi-line system with high-leveled and difficult with cooling to electric-controlled box temperature, liquid pipe degree of supercooling, compressor return air temperature of making a slip of the tongue are difficult to adjust
Problem is solved, and is had many advantages, such as energy saving, simple and reliable for structure, is maintained easily.
The embodiment of the above is only presently preferred embodiments of the present invention, not does limit in any form to the present invention
System.Anyone skilled in the art utilizes the skill of the disclosure above without departing from the scope of the technical proposal of the invention
Art content makes more possible variations and retouching to technical solution of the present invention, or modification is equivalent embodiment of the invention.
Therefore all contents without departing from technical solution of the present invention, equivalent equivalence changes, should all be covered by made by thinking according to the present invention
In protection scope of the present invention.
Claims (10)
1. a kind of temperature control multi-connected machine heat pump system with heat recovery function, including evaporator (16), condenser (15), the first change
Frequency compressor (11), the second frequency-changeable compressor (24), four-way valve (20), multi-joint indoor units, outdoor heat exchanger (21), subcooler
(7), gas-liquid separator (6), wherein in the evaporator (16) setting can heat exchange first flow path and second flow path；It is described
Four-way valve (20) includes tetra- interfaces of A, B, C, D, and the subcooler (7) includes tetra- interfaces of E, F, G, H, the second frequency conversion pressure
The output end of contracting machine (24) and one end of outdoor heat exchanger (21) are communicated with the interface A of four-way valve (20) and interface B respectively, described
The other end of outdoor heat exchanger (21) and one end of multi-joint indoor units are communicated with the interface E of subcooler (7) and interface F respectively,
The interface D and interface C of the four-way valve (20) are communicated with the other end of multi-joint indoor units and gas-liquid separator (6) respectively, institute
Gas-liquid separator (6) is stated to communicate with the input terminal of the second frequency-changeable compressor (24), it is characterised in that: further include have water tank (13),
First solenoid valve (1), second solenoid valve (2), third solenoid valve (3), the 4th solenoid valve (4), the 5th solenoid valve (5) and the 6th electricity
Magnet valve (12), electric-controlled box (8) and the first electric expansion valve (9), wherein be equipped with the first heat exchange in the inside of the electric-controlled box (8)
Electric-controlled box (8) is stretched out outside to be connected to the interface G and gas-liquid of subcooler (7) in pipe (82) and first heat exchanger tube (82) both ends respectively
Separator (6), the outside of the water tank (13) pass through the output that the second heat exchanger tube (132) being preset with is separately connected water tank (13)
Mouth and input port, and second heat exchanger tube (132) circulates through condenser (15), the both ends of first solenoid valve (1)
It is communicated respectively with the interface A of the output end of the second frequency-changeable compressor (24) and four-way valve (20)；Above-mentioned component constitutes system
Heat pump heat recovery module and auxiliary heat-exchanging module；
The composition of the heat pump heat recovery module connects: the output end of first frequency-changeable compressor (11) and condenser (15)
One end communicate, the first flow path both ends of the evaporator (16) respectively with the input terminal of the first frequency-changeable compressor (10) and condensation
Device (15) communicates, the second flow path both ends of the evaporator (16) respectively with third solenoid valve (3) and second solenoid valve (2) phase
Logical, the second solenoid valve (2) communicates with the second frequency-changeable compressor (24) output end, the third solenoid valve (3) and four-way valve
(20) interface A is communicated；
The composition of the auxiliary heat-exchanging module connects: the 4th solenoid valve (4) is located at third solenoid valve (3) and four-way valve
(20) between interface A, the both ends of first electric expansion valve (9) interface with third solenoid valve (3) and subcooler (7) respectively
H is communicated, and the both ends of the electric-controlled box (8) are communicated with the interface G of subcooler (7) and gas-liquid separator (6) respectively, the 6th electricity
The both ends of magnet valve (12) are communicated with third solenoid valve (3) and electric-controlled box (8) respectively, the 5th solenoid valve (5) respectively with four-way valve
(20) interface A and electric-controlled box (8) is communicated, and gas-liquid separator (6) is communicated with the 5th solenoid valve (5).
2. a kind of temperature control multi-connected machine heat pump system with heat recovery function according to claim 1, it is characterised in that: also
Including oil eliminator (25), wherein the output end of one end of the oil eliminator (25) and second frequency-changeable compressor (24)
Mouth communicates, and the other end of the oil eliminator (25) is communicated with the first solenoid valve (1) and second solenoid valve (2) respectively.
3. a kind of temperature control multi-connected machine heat pump system with heat recovery function according to claim 1, it is characterised in that:
The second electric expansion valve (17) are equipped between the condenser (15) and the evaporator (16).
4. a kind of temperature control multi-connected machine heat pump system with heat recovery function according to claim 1, it is characterised in that:
Third electric expansion valve (22) are equipped between the interface E and outdoor heat exchanger (21) of the subcooler (7).
5. a kind of temperature control multi-connected machine heat pump system with heat recovery function according to claim 1, it is characterised in that:
Primary low sensor (10) are equipped between second frequency-changeable compressor (24) input terminal and gas-liquid separator (6).
6. a kind of temperature control multi-connected machine heat pump system with heat recovery function according to claim 1, it is characterised in that:
Further include the coolant-temperature gage detector (131) for having in water tank (13) and being used for real-time monitoring water temperature, be set to electric-controlled box (8) inside
For the automatically controlled temperature detector (81) of real-time monitoring electric-controlled box (8) internal element temperature and set on gas-liquid separator (6) inside
Vapor-liquid temperature detector (61) for real-time monitoring gas-liquid separator (6) internal temperature.
7. a kind of a kind of temperature control multi-connected machine heat pump system with heat recovery function as claimed in any one of claims 1 to 6
Control method, it is characterised in that: defining coolant-temperature gage detector (131) the real-time monitoring water temperature is real time temperature T1, required
Water temperature is set temperature T1s, and automatically controlled temperature detector (81) real-time monitoring electric-controlled box (8) internal temperature is real time temperature
T2, sets controlled electric-controlled box (8) internal temperature as T2s, vapor-liquid temperature detector (61) the real-time monitoring gas-liquid separation
Device (6) internal temperature is real time temperature T3, and it is Tpe that low-pressure temperature is corresponded at primary low sensor (10), and system is according to real-time temperature
Spend T1 compared with the size between set temperature T1s, corresponding starting or close the first frequency-changeable compressor (11) to starting or
Close heat pump heat recovery module；Compared with the size between real time temperature T2 and set temperature T2s, real time temperature T3 and low pressure
Size between temperature Tpe compares, corresponding the 4th solenoid valve (4) controlled in auxiliary heat-exchanging module, the 5th solenoid valve (5), the
The opening and closing of six solenoid valves (12) and the aperture for adjusting the first electric expansion valve (9)；
If set temperature T1s is greater than real time temperature T1, close the first solenoid valve (1), opens second solenoid valve (2) and third electricity
Magnet valve (3), system start the first frequency-changeable compressor (11), and heat pump heat recovery module starts to heat work, until set temperature T1s
It less than or equal to real time temperature T1, closes the first solenoid valve (1), opens second solenoid valve (2) and third solenoid valve (3), system
Stop starting the first frequency-changeable compressor (11), heat pump heat recovery module stops heating work；
If real time temperature T2 is greater than set temperature T2s and adds Y value at this time, the first solenoid valve (1) and the 4th solenoid valve (4) are closed, is beaten
Second solenoid valve (2) and third solenoid valve (3) are opened, the first electric expansion valve (9) aperture is adjusted；Until real time temperature T2 be less than or
Add X value equal to a certain set temperature T2s, opens the 6th solenoid valve (12)；
If the difference between real time temperature T3 and low-pressure temperature Tpe is less than or equal to setting value Z at this time, the first solenoid valve is closed
(1), the 4th solenoid valve (4) and the 5th solenoid valve (5) open second solenoid valve (2), third solenoid valve (3)；Until real time temperature
When difference is greater than a certain setting value T between T3 and low-pressure temperature Tpe, the first solenoid valve (1), the 4th solenoid valve (4) are closed, opens the
Two solenoid valves (2), third solenoid valve (3) and the 5th solenoid valve (5).
8. a kind of control method of temperature control multi-connected machine heat pump system with heat recovery function according to claim 7,
It is characterized in that: when real time temperature T2, which is greater than set temperature T2s, to be added Y value and add X value less than or equal to set temperature T2s, system
As set temperature T2s adds X value to be gradually reduced, set temperature T2s adds Y value to be gradually reduced, first electronic expansion in operation
The valve body aperture and detection time of valve (9) close the 4th solenoid valve when X value is negative value with Y value in variation of successively decreasing step by step
(4), the valve body aperture of first electric expansion valve (9) is negative value.
9. a kind of control method of temperature control multi-connected machine heat pump system with heat recovery function according to claim 7,
It is characterized in that: in system operation, if the difference between real time temperature T3 and low-pressure temperature Tpe is greater than the set value T and is less than setting value Z
When, as setting value T and setting value Z are gradually increased, the valve body folding time of the 5th solenoid valve (5) becomes in incremental step by step
Change.
10. a kind of control method of temperature control multi-connected machine heat pump system with heat recovery function according to claim 7,
Be characterized in that: in system operation, if set temperature T1s is less than or equal to real time temperature T1, real time temperature T2 is less than or equal to certain
One set temperature T2s adds X value, when difference is greater than a certain setting value T between real time temperature T3 and preset temperature Tpe, closes the first electricity
Magnet valve (1) and the 4th solenoid valve (4) open second solenoid valve (2), third solenoid valve (3), the 5th solenoid valve (5) and the 6th electricity
Magnet valve (12).
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| CN201811573057.5A CN109579356B (en) | 2018-12-21 | 2018-12-21 | Temperature control multi-online heat pump system with heat recovery function and control method |
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