Integral type high temperature frequency conversion heat pump heats air conditioning system
Technical field
The present invention relates to a kind of air conditioning system, specifically a kind of integral type high temperature frequency conversion heat pump heating air conditioning system.
Background technology
Existing high temperature heat pump heats air conditioning unit that is, vapor-compression cycle air source heat pump air-conditioner unit.Unit itself consumes
Part electric energy, most of heat is to absorb surrounding medium -- the heat of in the air, improves temperature by heat-transfer working medium blood circulation
The backward closing barn release heat needing heating.Traditional type heat pump unit mainly by compressor, condenser, vaporizer,
Condenser fan and evaporator fan five part composition.Heat pump unit generally adopts split-type design, that is, compressor, steaming
Send out device, evaporation fan is designed to an off-premises station, condenser and condensation fan form indoor set.Indoor set is heated with high temperature barn
Room commissure, realizes high-temperature heating.The heat pump unit of prior art typically adopts double loop heating, that is, by two functions
Complete heating composes in parallel.Each system can be with independent operating it is also possible to run simultaneously, and control system is according to default control
Parameter processed selects to need the heating of start and stop, with mate barn in different periods needed for heating capacity and the rate of heat addition, reduce
Barn dry-bulb temperature fluctuates.
The high temperature heat pump heating air-conditioning of prior art generally there are following bad:
1st, existing high temperature heat pump heating air-conditioning typically adopts split type, and it is indoor that heat pump condenser is arranged on barn heating, leads to
Cross copper pipe and off-premises station(Vaporizer)Connect.In device installation process, especially extremely inconvenient, erector installed by condenser
Work amount is larger, and the copper pipe of connection condenser and vaporizer is longer, and SR and heat loss are larger.
2nd, existing high temperature heat pump heating air-conditioning heating system dual system typically adopts two invariable frequency compressors, and system A is main
Heating system, system B is auxiliary heating system, and system A and system B complete the control to barn temperature jointly, and dual system is simultaneously
Start, is heated in barn inside, when barn actual temperature is close or slightly exceeds the temperature setting, by start stop system B
Implement the fine setting to heating capacity, to reach the temperature accuracy needed for barn.Frequent start-stop B system is leaned in regulation due to temperature accuracy
Compressor, makes B system compressor operation reliability reduce, and invariable frequency compressor frequent start-stop, and the thermal inertia of system leads to bake
Room temperature fluctuation is big, easily exceeds the temperature accuracy setting, is unfavorable for the realization of baking process.
3rd, existing high temperature heat pump heats air conditioning system, when barn is close to 70 DEG C of high temperature, because condensation temperature is too high, compression
Machine pressure at expulsion and delivery temperature are substantially all close to coolant(R134a)Critical point, compressor load, close to the limit, reduces compressor
Exhaust efficiency, thus be extremely difficult to predetermined barn temperature.
4th, prior art dual system power consumption is big, and product Energy Efficiency Ratio is low(Comprehensive COP is not more than 4), do not meet energy-saving and emission-reduction reason
Read.
Content of the invention
Present invention aim to overcome that the defect that exists of above-mentioned prior art and a kind of integral type high temperature frequency conversion heat of providing
Pump heats air conditioning system.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that:
Integral type high temperature frequency conversion heat pump heat air conditioning system, including frequency conversion second vapor injection screw compressor, plate type heat exchanger,
Fin condenser, evaporator fin, main road heating power expansion valve, normally open type magnetic valve, gas-liquid separator, device for drying and filtering, normally closed
Formula electromagnetic valve, branch road heating power expansion valve, axle stream condensation fan, axle flow evaporator blower fan, pipeline, high pressure detection valve, low pressure detection valve,
High-pressure switch, low pressure switch and liquid-sighting glass;According to the flow direction of cold-producing medium, by pipeline by described frequency conversion
Between QI invigorating screw compressor be connected with described fin condenser, cold-producing medium forms the after described fin condenser condensation
One closed circuit and second circulation loop, described first circulation loop is the import one being sequentially connected described plate type heat exchanger
Return to frequency conversion second vapor injection screw compressor with outlet one, second described closed circuit is to pass sequentially through normally closed type electromagnetism
Valve, branch road heating power expansion valve, the import two of plate type heat exchanger and outlet two, device for drying and filtering, liquid-sighting glass, main road thermal expansion
Frequency conversion second vapor injection scroll compression is returned to after valve, evaporator fin, gas-liquid separator, low pressure detection valve and low pressure switch
Machine;Described axle stream condensation fan is installed and is installed with described fin condenser phase, described axle flow evaporator blower fan and described
Evaporator fin phase is installed.
Preferably, described normally open type magnetic valve air inlet and gas outlet are arranged on device for drying and filtering by pipeline respectively
On the gas outlet of air inlet and main road heating power expansion valve.
Compared with prior art, beneficial effects of the present invention are:
The present invention, in order to overcome the shortcoming of prior art, heats air conditioning system, compression using integral type high temperature frequency conversion heat pump
Machine adopts high temperature heat pump special frequency conversion second vapor injection screw compressor, controls compressor by adjusting compressor operation frequency
Discharge capacity, the heating capacity of dynamic regulation condensation side, thus realize to the control of barn internal temperature it is ensured that the temperature-controlled precision of barn.
In order to ensure the reliability of high temperature mode, the system employs distinctive Gas-supplying enthalpy-increasing mode, and after partial condensation, coolant is through propping up
After the heating power expansion valve reducing pressure by regulating flow of road, enter plate type heat exchanger and carry out heat exchange with another part condensation coolant, reduce further
Condensation refrigerant pressure and temperature, thus ensureing the condensation effect in high temperature for the unit, reduces compressor high temperature load it is ensured that unit
Reliability.
Brief description
Fig. 1 is that integral type high temperature frequency conversion heat pump of the present invention heats air conditioning system connection diagram.
In figure:1- frequency conversion second vapor injection screw compressor;2- plate type heat exchanger;3- fin condenser;4- evaporator fin;
5- main road heating power expansion valve;6- normally open type magnetic valve;7- gas-liquid separator;8- device for drying and filtering;9- normally closed solenoid valve;10-
Branch road heating power expansion valve;11- axle stream condensation fan;12- axle flow evaporator blower fan;13- pipeline;14- high pressure detects valve;15- low pressure
Detection valve;16- high-pressure switch;17- low pressure switchs;18- liquid-sighting glass.
Specific embodiment
Referring to shown in accompanying drawing 1, integral type high temperature frequency conversion heat pump heats air conditioning system, including frequency conversion second vapor injection scroll compression
Machine 1, plate type heat exchanger 2, fin condenser 3, evaporator fin 4, main road heating power expansion valve 5, normally open type magnetic valve 6, gas-liquid are divided
From device 7, device for drying and filtering 8, normally closed solenoid valve 9, branch road heating power expansion valve 10, axle stream condensation fan 11, axle flow evaporator blower fan
12nd, pipeline 13, high pressure detection valve 14, low pressure detection valve 15, high-pressure switch 16, low pressure switch 17 and liquid-sighting glass 18;
According to the flow direction of cold-producing medium, by pipeline 13 by described frequency conversion second vapor injection screw compressor 1 and described fin cold
Condenser 3 is connected, and cold-producing medium forms first circulation loop and second circulation loop, institute after described fin condenser 3 condensation
The first circulation loop stated is to be sequentially connected described import one 2-1 of plate type heat exchanger 2 and outlet one 2-2 to return in the middle of frequency conversion
QI invigorating screw compressor 1, described second closed circuit be pass sequentially through normally closed solenoid valve 9, branch road heating power expansion valve 10,
Import two 2-3 of plate type heat exchanger 2 and outlet two 2-4, device for drying and filtering 8, liquid-sighting glass 18, main road heating power expansion valve 5, fin steam
Frequency conversion second vapor injection screw compressor 1 is returned to after sending out device 4, gas-liquid separator 7, low pressure detection valve 15 and low pressure switch 17;
Described axle stream condensation fan 11 is installed and is mutually installed with described fin condenser 3, described axle flow evaporator blower fan 12 with described
Evaporator fin 4 mutually install.
Preferably, described normally open type magnetic valve 6 air inlet and gas outlet are arranged on dry filter by pipeline 13 respectively
On the gas outlet of the air inlet of device 8 and main road heating power expansion valve 5.
The operation principle of the present invention is as follows:
The gas coolant of the High Temperature High Pressure that frequency conversion second vapor injection screw compressor 1 is discharged, passes sequentially through high-pressure switch
16th, high pressure detection valve 14 enters fin condenser 3, and in the presence of axle stream condensation fan 11, the gas coolant of High Temperature High Pressure exists
Undergo phase transition in fin condenser 3 and be condensed into high-pressure gas-liquid mixture, through the condensed high-pressure gas-liquid mixture of fin condenser 3
Form first circulation loop and second circulation loop, described first circulation loop is that a part of high-pressure gas-liquid mixture directly enters
Enter import one 2-1 of plate type heat exchanger 2, return to frequency conversion second vapor injection screw compressor in outlet one 2-2 by plate type heat exchanger 2
In 1;It is swollen that described second circulation loop is that a part of high-pressure gas-liquid mixture passes sequentially through normally closed solenoid valve 9, branch road heating power
Swollen valve 10, import two 2-3 of plate type heat exchanger 2 and outlet two 2-4, device for drying and filtering 8, liquid-sighting glass 18, main road heating power expansion valve
5th, return to frequency conversion second vapor injection after evaporator fin 4, gas-liquid separator 7, low pressure detection valve 15 and low pressure switch 17 to be vortexed
In compressor 1.In first circulation loop, high-pressure gas-liquid mixture is evaporated forming gaseous refrigerant in plate type heat exchanger 2
Flow back to frequency conversion second vapor injection screw compressor 1.In second circulation loop, high-pressure gas-liquid mixture is carried out in plate type heat exchanger 2
Evaporation carries out throttling again by main road heating power expansion valve 5 after forming gaseous refrigerant and forms liquid refrigerant, liquid refrigerant
During by evaporator fin 4, in the presence of axle flow evaporator blower fan 12, produce evaporative phase-change, absorb amount of heat and become gaseous state
Cold-producing medium;Gaseous refrigerant now returns to change after passing through gas-liquid separator 7, low pressure detection valve 15 and low pressure switch 17 again
In frequency second vapor injection screw compressor 1.
Integral type high temperature frequency conversion heat pump heating air conditioning system of the present invention is in order to ensure system because putting down moment after hang-up
Weighing apparatus high and low pressure side pressure, starts as early as possible, and the air inlet of device for drying and filtering 8 is in parallel with the gas outlet of main road heating power expansion valve 5 even
Connect a normally open type magnetic valve 6, to realize the rapid regulation to pressure.Simultaneously for the safety of protection system, in system also
Devise high pressure detection valve 14, low pressure detection valve 15, high-pressure switch 16, low pressure switch 17 and liquid-sighting glass 18.