CN106766365A - Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning - Google Patents

Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning Download PDF

Info

Publication number
CN106766365A
CN106766365A CN201611070535.1A CN201611070535A CN106766365A CN 106766365 A CN106766365 A CN 106766365A CN 201611070535 A CN201611070535 A CN 201611070535A CN 106766365 A CN106766365 A CN 106766365A
Authority
CN
China
Prior art keywords
heat exchanger
frequency
frequency conversion
heater
changeable compressor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611070535.1A
Other languages
Chinese (zh)
Inventor
李钱生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, Guangdong Midea HVAC Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201611070535.1A priority Critical patent/CN106766365A/en
Publication of CN106766365A publication Critical patent/CN106766365A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/029Control issues
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/031Sensor arrangements
    • F25B2313/0313Pressure sensors near the outdoor heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/031Sensor arrangements
    • F25B2313/0314Temperature sensors near the indoor heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/19Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2103Temperatures near a heat exchanger

Abstract

The present invention relates to air-conditioning VFC field, more particularly to frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning.Frequency conversion air-cooled heat pump water chiller-heater system includes:Frequency-changeable compressor, indoor heat exchanger, outdoor heat exchanger, three is in series to heat loop or refrigerating circuit;Outdoor heat exchanger is furnished with frequency conversion fan;The water outlet side of indoor heat exchanger sets leaving water temperature sensors;Frequency-changeable compressor, frequency conversion fan, leaving water temperature sensors are connected with controller respectively.Its control method includes:In loop or refrigerating circuit is heated, the leaving water temperature of indoor heat exchanger is detected;Leaving water temperature is compared with given threshold, running frequency is determined according to comparative result.The present invention uses the cooperation of frequency-changeable compressor and frequency conversion fan, with reference to the leaving water temperature of indoor heat exchanger, the frequency conversion function mode of frequency-changeable compressor is determined, with the stable regulation when adapting to high load capacity, underload, relatively continuous fluctuating temperature is formed, the comfortableness that user uses is improve.

Description

Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning
Technical field
The present invention relates to air-conditioning VFC field, more particularly to frequency conversion air-cooled heat pump water chiller-heater system and its controlling party Method and air-conditioning.
Background technology
It is main using blower fan outside constant speed compressor and constant speed in existing air-cooled heat-pump cold (heat) water dispenser group, determine its simple Structure, cheap price, reliability higher captured most market, but as international community is to the weight of environmental energy Depending on, people to the high request of air conditioning comfortableness, constant speed product is difficult in adapt to the development trend of society in the future.Existing air-cooled heat pump Cold (heat) water system is difficult to the seasonal energy efficiency high of international community's requirement using constant speed compressor and blower fan, is realizing underload Can only be by frequent start-stop compressor during operation, the fluctuating temperature for causing also further have impact on the comfortableness that user uses.
The content of the invention
(1) technical problem to be solved
It is an object of the invention to provide a kind of frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning, to solve The problem of air-cooled heat pump (heat) water dispenser group changed speed operation.
(2) technical scheme
In order to solve the above-mentioned technical problem, the present invention puies forward a kind of frequency conversion air-cooled heat pump water chiller-heater system, and it includes:Frequency conversion pressure Contracting machine, indoor heat exchanger, outdoor heat exchanger, three is in series to heat loop or refrigerating circuit;Wherein, the frequency-changeable compressor It is connected with the indoor heat exchanger, the outdoor heat exchanger by gas exhaust piping and return line;
The outdoor heat exchanger is furnished with frequency conversion fan;The water outlet side of the indoor heat exchanger sets leaving water temperature sensors;
The frequency-changeable compressor, the frequency conversion fan, the leaving water temperature sensors are connected with controller respectively.
It is preferably in certain embodiments, four-way reversing valve and the room is passed through on the gas exhaust piping of the frequency-changeable compressor The connected composition of interior heat exchanger heats loop, or the composition refrigerating circuit that is connected with outdoor heat exchanger.
It is preferably in certain embodiments, gas-liquid separator is set in the return line.
It is preferably in certain embodiments, the pipeline between the indoor heat exchanger and the outdoor heat exchanger and the row Hot-gas bypass is set between air pipe, hot gas bypass solenoid valve is set on the hot-gas bypass.
Be preferably in certain embodiments, in cooling mode, when the indoor heat exchanger and the outdoor heat exchanger it Between pipeline in pressure when being less than given threshold, the hot gas bypass solenoid valve is opened.
It is preferably in certain embodiments, pressure is set on the pipeline between the indoor heat exchanger and the outdoor heat exchanger Force snesor.
It is preferably in certain embodiments, oil eliminator is set on the gas exhaust piping;The separation gas of the oil eliminator Body is exported and heats loop or refrigerating circuit supply to described, and the separation oil export of the oil eliminator accesses the frequency conversion pressure Contracting machine.
It is preferably in certain embodiments, sets more than one between the separation oil export and the frequency-changeable compressor Capillary return duct, sets single-pass magnetic valve on capillary return duct described in wherein at least one.
It is preferably in certain embodiments, the single-pass magnetic valve is opened for discontinuity.
It is preferably in certain embodiments, hot-gas bypass, hot gas is set between the separation oil export and the gas exhaust piping Hot gas bypass solenoid valve is set in bypass.
Present invention also offers a kind of air-conditioning, it includes described frequency conversion air-cooled heat pump water chiller-heater system.
Present invention also offers a kind of control method of the frequency conversion air-cooled heat pump water chiller-heater system, it includes:
In loop or refrigerating circuit is heated, the leaving water temperature of indoor heat exchanger is detected;
The leaving water temperature and given threshold are compared;When the leaving water temperature is less than the given threshold, then Improve the frequency of frequency-changeable compressor and outdoor heat exchanger frequency conversion fan;When the leaving water temperature is more than the given threshold, then Reduce the frequency of frequency-changeable compressor and outdoor heat exchanger frequency conversion fan.
It is preferably in certain embodiments, when in refrigeration mode, starts refrigerating circuit, the control method is also wrapped Include:
Detect the pressure value of pipeline between the indoor heat exchanger and the outdoor heat exchanger;
When the pressure value is less than pressure threshold, start hot gas bypass solenoid valve, changed to the interior from gas exhaust piping Pipeline supply between hot device and the outdoor heat exchanger.
It is preferably in certain embodiments, described control method also includes:
Before the gas of frequency-changeable compressor discharge is supplied to the indoor heat exchanger or outdoor heat exchanger, to the change The gas of frequency compressor discharge carries out oily separation, separates oil and returns to frequency-changeable compressor by more than one capillary return duct;
Magnetic valve is set on the capillary return duct of part, and the magnetic valve discontinuity is opened.
(3) beneficial effect
The technical scheme that the present invention is provided, using the cooperation of frequency-changeable compressor and frequency conversion fan, with reference to indoor heat exchanger Leaving water temperature, determines the frequency conversion function mode of frequency-changeable compressor, with the stable regulation when adapting to high load capacity, underload, Relatively continuous fluctuating temperature is formed, the comfortableness that user uses is improve.
On the other hand, hot-gas bypass is set between the pipeline and gas exhaust piping between indoor heat exchanger and outdoor heat exchanger, with During regulation low load operation, the hypotony problem between indoor heat exchanger and outdoor heat exchanger.
On the other hand, oil eliminator is set on gas exhaust piping, can to low load operation when, oil return is bad asks for regulation Topic.
Brief description of the drawings
Fig. 1 is frequency conversion air-cooled heat pump water chiller-heater system schematic in one embodiment of the invention;
Fig. 2 is air-conditioning schematic diagram in one embodiment of the invention.
Accompanying drawing is marked:
1 frequency-changeable compressor;2 outdoor heat exchangers;3 indoor heat exchangers;4 frequency conversion fans;5 choke valves;6 oil eliminators;7 hot gas Bypass;8 hot gas bypass solenoid valves;9 high-voltage switch gears;10 low tension switches;11 capillary return ducts;12 returning-oil temperature sensors;13 gas Liquid/gas separator;T4 environment temperature sensors;T3 air side heat exchanger pipe temperature sensors;Tz air side heat exchanger outlet temperature sensors; Tin inflow temperature sensors;Tout leaving water temperature sensors;The antifreeze temperature sensors of T6;T7C1, T7C2 delivery temperature are sensed Device;TL suction temperature sensors;SV4 single-pass magnetic valves.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.Following instance For illustrating the present invention, but it is not limited to the scope of the present invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected;Can Being to mechanically connect, or electrically connect;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi Two connections of element internal.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
Because machinery, to frequency-changeable compressor start and stop, causes regulation discontinuous in current underload, high load capacity operation of air conditioner, use Uncomfortable problem is felt at family, and the present invention provides frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning.
Product, method etc. will be described in detail by basic engineering, extension design and alternative design below.
A kind of air-conditioning frequency conversion air-cooled heat pump water chiller-heater system, as shown in figure 1, it is main by frequency-changeable compressor 1, indoor heat exchange Device 3, outdoor heat exchanger 2 are constituted, wherein frequency-changeable compressor, indoor heat exchanger 3 (water-side heat), outdoor heat exchanger 2 (change by wind side Hot device) three constitutes the series circulation path of refrigeration mode or heating mode, i.e. refrigerating circuit or heats loop.Under heating mode (heating loop), the high temperature and high pressure gas of frequency-changeable compressor discharge initially enter indoor heat exchanger 3 and (serve as condenser, perform cold Solidifying function), heat exchange, room air is warmed, and the refrigerant after being condensed (serves as evaporator, perform evaporation into outdoor heat exchanger 2 Function), gas returns to frequency-changeable compressor after evaporation, is compressed to high temperature and high pressure gas, realizes that heats a circulation.Refrigeration mode Under (refrigerating circuit), frequency-changeable compressor discharge high temperature and high pressure gas initially enter outdoor heat exchanger 2 (serve as condenser, perform Condensation function), the refrigerant after being condensed gets in heat exchanger 3 (serving as evaporator, perform vaporization function), heat exchange, Interior Space Gas is lowered the temperature, and the gas after evaporation returns to frequency-changeable compressor, is compressed to high temperature and high pressure gas, realizes a kind of refrigeration cycle.
Real-time Collection temperature everywhere for convenience, convenient regulation, frequency-changeable compressor sets frequency-changeable compressor head temperature and passes Sensor, gas exhaust piping is setting exhaust gas temperature sensor T7C1, T7C2 close to frequency-changeable compressor exhaust ports, in outdoor heat exchanger Environment temperature sensor T4 and air side heat exchanger pipe temperature sensor T3 is set on 2, indoors heat exchanger 3 and outdoor heat exchanger 2 it Between pipeline be also provided with air side heat exchanger outlet temperature sensor Tz, the water inlet of indoor heat exchanger 3 at the outdoor heat exchanger 2 Inflow temperature sensor Tin is set at mouthful, and water outlet sets in leaving water temperature sensors Tout, indoor heat exchanger 3 and also sets up Antifreeze temperature sensor T6, sets suction temperature sensor TL in return line.Above-mentioned various temperature sensors with control Device is connected.High-voltage switch gear 9 is also provided with gas exhaust piping, low tension switch 10 is also provided with return line.
Wherein, common exhaust pipe road and return line in loop or refrigerating circuit is heated, frequency-changeable compressor 1 is by exhaust Pipeline and return line are connected with indoor heat exchanger 3, outdoor heat exchanger 2;In order to realize to frequency conversion fan 4 and frequency-changeable compressor 1 VFC, the water outlet side of indoor heat exchanger 3 sets leaving water temperature sensors Tout, frequency-changeable compressor 1, frequency conversion fan 4, goes out Water temperature sensor Tout is connected with controller respectively, after controller receives leaving water temperature value, according to the leaving water temperature value and setting Determine temperature threshold, determine how regulation running frequency.(specific adjusting method, the control method that see below).
Gas exhaust piping mentioned above, return line pass through four-way reversing valve and indoor heat exchanger 3 or outdoor heat exchanger 2 are connected, and composition heats loop or refrigerating circuit.In certain embodiments, in order to improve return-air effect, set in return line Gas-liquid separator 13.
When being run under refrigeration mode, underload based on frequency-changeable compressor 1, frequency conversion fan 4, indoor heat exchanger 3 and outdoor Easily there is the relatively low situation of air pressure after refrigeration throttling in pipeline between heat exchanger 2, in order to avoid such case, the pipeline with Hot-gas bypass 7 is set between gas exhaust piping, hot gas bypass solenoid valve 8 is set on hot-gas bypass 7.Once detect indoor heat exchanger 3 And air pressure between outdoor heat exchanger 2 is relatively low, opens hot gas bypass solenoid valve 8, to realize that effective atmosphere is supplemented.I.e. in refrigeration mould Under formula, when pressure is less than given threshold in the pipeline between indoor heat exchanger 3 and outdoor heat exchanger 2, hot gas bypass solenoid valve 8 Open.
In order to effectively obtain the atmospheric pressure value of the pipeline between indoor heat exchanger 3 and outdoor heat exchanger 2, the section on the pipeline Stream valve 5 exit sets pressure sensor.
In view of often occurring the bad problem of oil return during low load operation, therefore, set on gas exhaust piping Oil eliminator 6;The separated gas outlet of oil eliminator 6 goes out to loop or refrigerating circuit supply, the separation oil of oil eliminator 6 is heated Mouth accesses frequency-changeable compressor 1.
In order to send the oil after separation back to frequency-changeable compressor again, set between oil export and frequency-changeable compressor 1 being separated More than one capillary return duct 11, which part capillary return duct 11 is unimpeded state, between other capillary return ducts 11 are Disconnection is opened, and is controlled by single-pass magnetic valve SV4.Single-pass magnetic valve SV4 is opened for discontinuity.Such as:Periodically open.Capillary is returned Returning-oil temperature sensor 12 can also be set in flow tube.
In certain embodiments, when oil is separated and hot-gas bypass 7 simultaneously in the presence of, separate and set between oil export and gas exhaust piping Hot-gas bypass 7 is put, hot gas bypass solenoid valve 8 is set on hot-gas bypass 7.
Above-mentioned frequency conversion air-cooled heat pump water chiller-heater system is applied to air-conditioning, as shown in Fig. 2 new air-conditioning will be obtained.
A kind of control method is provided with reference to frequency conversion air-cooled heat pump water chiller-heater system mentioned above, its step includes:
Step 110, in loop or refrigerating circuit is heated, detects the leaving water temperature of indoor heat exchanger;
Step 120, leaving water temperature is compared with given threshold;
When leaving water temperature is less than given threshold, then the frequency of frequency-changeable compressor and outdoor heat exchanger frequency conversion fan is improved; When leaving water temperature is more than given threshold, then the frequency of frequency-changeable compressor and outdoor heat exchanger frequency conversion fan is reduced.
Such as:Set temperature value is 7 DEG C, when leaving water temperature is more than 7 DEG C, reduces the fortune of frequency-changeable compressor and frequency conversion fan Turn frequency, when leaving water temperature is less than 7 DEG C, improve the operating frequency of frequency-changeable compressor and frequency conversion fan.
In addition, after the selection of refrigeration or heating mode is received, corresponding mode operation can be entered, when in refrigeration mode When, start refrigerating circuit, now, in addition to performing step 110 and step 120, when especially starting low-frequency operation, in addition it is also necessary to carry out Following steps:
Step 200, the pressure value of pipeline between detection indoor heat exchanger and outdoor heat exchanger;
When pressure value is less than pressure threshold, start hot gas bypass solenoid valve, from gas exhaust piping to indoor heat exchanger and room Pipeline supply between external heat exchanger.
In addition, under heating mode or refrigeration mode, in low-frequency operation, with reference to oil eliminator, in frequency-changeable compressor row The gas for going out also needs to carry out following steps before being supplied to indoor heat exchanger or outdoor heat exchanger:
Step 300, the gas to frequency-changeable compressor discharge carries out oily separation, separates oil and is flowed back by more than one capillary Pipe returns to frequency-changeable compressor;Part capillary return duct will directly separate oil feeding frequency-changeable compressor, be set on the capillary return duct of part Magnetic valve is put, magnetic valve discontinuity is opened.
Step 310, in cooling mode, the pressure value of pipeline between detection indoor heat exchanger and outdoor heat exchanger;
The step is based on air exit and indoor heat exchanger (water cooling heat exchanger) and outdoor heat exchanger (wind in oil eliminator Cold heat exchanger) hot-gas bypass between connecting path.
When pressure value is less than pressure threshold, start hot gas bypass solenoid valve, from gas exhaust piping to indoor heat exchanger and room Pipeline supply between external heat exchanger.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.

Claims (14)

1. a kind of frequency conversion air-cooled heat pump water chiller-heater system, it is characterised in that including:Frequency-changeable compressor, indoor heat exchanger, outdoor are changed Hot device, three is in series to heat loop or refrigerating circuit;Wherein, the frequency-changeable compressor passes through gas exhaust piping and return line It is connected with the indoor heat exchanger, the outdoor heat exchanger;
The outdoor heat exchanger is furnished with frequency conversion fan;The water outlet side of the indoor heat exchanger sets leaving water temperature sensors;
The frequency-changeable compressor, the frequency conversion fan, the leaving water temperature sensors are connected with controller respectively.
2. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 1, it is characterised in that the exhaust of the frequency-changeable compressor Loop is heated by the four-way reversing valve composition that is connected with the indoor heat exchanger on pipeline, or the composition system that is connected with outdoor heat exchanger Cold loop.
3. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 1, it is characterised in that gas is set in the return line Liquid/gas separator.
4. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 1, it is characterised in that the indoor heat exchanger and described Hot-gas bypass is set between the pipeline and the gas exhaust piping between outdoor heat exchanger, hot-gas bypass electricity is set on the hot-gas bypass Magnet valve.
5. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 4, it is characterised in that in cooling mode, when described When pressure is less than given threshold in pipeline between indoor heat exchanger and the outdoor heat exchanger, the hot gas bypass solenoid valve is opened Open.
6. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 4, it is characterised in that the indoor heat exchanger and described Pressure sensor is set on pipeline between outdoor heat exchanger.
7. the frequency conversion air-cooled heat pump water chiller-heater system as described in claim any one of 1-6, it is characterised in that the gas exhaust piping Upper setting oil eliminator;The separated gas outlet of the oil eliminator heats loop or refrigerating circuit supply, institute to described The separation oil export for stating oil eliminator accesses the frequency-changeable compressor.
8. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 7, it is characterised in that the separation oil export and described More than one capillary return duct is set between frequency-changeable compressor, single-pass electricity is set on capillary return duct described in wherein at least one Magnet valve.
9. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 8, it is characterised in that the single-pass magnetic valve is interruption Property open.
10. frequency conversion air-cooled heat pump water chiller-heater system as claimed in claim 7, it is characterised in that the separation oil export and institute Hot-gas bypass is set between stating gas exhaust piping, hot gas bypass solenoid valve is set on hot-gas bypass.
11. a kind of air-conditionings, it is characterised in that including the frequency conversion air-cooled heat pump water chiller-heater system described in claim any one of 1-10 System.
A kind of 12. control methods of the frequency conversion air-cooled heat pump water chiller-heater system as described in claim any one of 1-10, its feature exists In, including:
In loop or refrigerating circuit is heated, the leaving water temperature of indoor heat exchanger is detected;
The leaving water temperature and given threshold are compared;When the leaving water temperature is less than the given threshold, then improve The frequency of frequency-changeable compressor and outdoor heat exchanger frequency conversion fan;When the leaving water temperature is more than the given threshold, then reduce The frequency of frequency-changeable compressor and outdoor heat exchanger frequency conversion fan.
13. control methods as claimed in claim 12, it is characterised in that when in refrigeration mode, start refrigerating circuit, institute Stating control method also includes:
Detect the pressure value of pipeline between the indoor heat exchanger and the outdoor heat exchanger;
When the pressure value is less than pressure threshold, start hot gas bypass solenoid valve, from gas exhaust piping to the indoor heat exchanger And the pipeline supply between the outdoor heat exchanger.
14. control method as described in claim 12 or 13, it is characterised in that also include:
Before the gas of frequency-changeable compressor discharge is supplied to the indoor heat exchanger or outdoor heat exchanger, to the frequency conversion pressure The gas of contracting machine discharge carries out oily separation, separates oil and returns to frequency-changeable compressor by more than one capillary return duct;
Magnetic valve is set on the capillary return duct of part, and the magnetic valve discontinuity is opened.
CN201611070535.1A 2016-11-28 2016-11-28 Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning Pending CN106766365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611070535.1A CN106766365A (en) 2016-11-28 2016-11-28 Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611070535.1A CN106766365A (en) 2016-11-28 2016-11-28 Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning

Publications (1)

Publication Number Publication Date
CN106766365A true CN106766365A (en) 2017-05-31

Family

ID=58904239

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611070535.1A Pending CN106766365A (en) 2016-11-28 2016-11-28 Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning

Country Status (1)

Country Link
CN (1) CN106766365A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107576107A (en) * 2017-07-18 2018-01-12 广东美的暖通设备有限公司 A kind of method for preventing heat exchanger from freezing, system and air cooling module unit
CN108131806A (en) * 2017-12-21 2018-06-08 海信(山东)空调有限公司 Temprature control method and line control machine
CN109059376A (en) * 2018-08-13 2018-12-21 珠海格力电器股份有限公司 A kind of full frequency conversion heat pump system constant temperature water supply control method and system
CN112484248A (en) * 2020-11-02 2021-03-12 珠海格力电器股份有限公司 Air conditioner device control method and device and air conditioner

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718248A (en) * 1986-05-05 1988-01-12 Stephen Fisher Four element refrigeration heat pump and geothermal control systems
CN2428737Y (en) * 2000-04-14 2001-05-02 清华大学 Small frequency-variable wind-cooling heat-pump water-cooling-heating machine group
CN101070996A (en) * 2006-05-12 2007-11-14 上海久源新能源科技有限公司 Heat pump water heater with low temeprature environment fast start device
EP1972871A2 (en) * 2007-03-19 2008-09-24 Mitsubishi Electric Corporation Hot water system
CN203163329U (en) * 2013-03-11 2013-08-28 广东美的制冷设备有限公司 Air conditioner
CN103471299A (en) * 2013-08-30 2013-12-25 青岛海信日立空调系统有限公司 Multi-connected air-conditioner oil control system and oil control method
CN104011483A (en) * 2011-12-27 2014-08-27 三菱电机株式会社 Air Conditioner
CN104067064A (en) * 2012-04-06 2014-09-24 三菱重工业株式会社 Control device, method, and program, and multi-type air conditioning system comprising same
CN105758066A (en) * 2016-04-25 2016-07-13 广东美的暖通设备有限公司 Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system
CN105823213A (en) * 2016-05-13 2016-08-03 艾欧史密斯(中国)热水器有限公司 Heat-pump water heater

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4718248A (en) * 1986-05-05 1988-01-12 Stephen Fisher Four element refrigeration heat pump and geothermal control systems
CN2428737Y (en) * 2000-04-14 2001-05-02 清华大学 Small frequency-variable wind-cooling heat-pump water-cooling-heating machine group
CN101070996A (en) * 2006-05-12 2007-11-14 上海久源新能源科技有限公司 Heat pump water heater with low temeprature environment fast start device
EP1972871A2 (en) * 2007-03-19 2008-09-24 Mitsubishi Electric Corporation Hot water system
CN104011483A (en) * 2011-12-27 2014-08-27 三菱电机株式会社 Air Conditioner
CN104067064A (en) * 2012-04-06 2014-09-24 三菱重工业株式会社 Control device, method, and program, and multi-type air conditioning system comprising same
CN203163329U (en) * 2013-03-11 2013-08-28 广东美的制冷设备有限公司 Air conditioner
CN103471299A (en) * 2013-08-30 2013-12-25 青岛海信日立空调系统有限公司 Multi-connected air-conditioner oil control system and oil control method
CN105758066A (en) * 2016-04-25 2016-07-13 广东美的暖通设备有限公司 Outdoor unit of variable refrigerant flow air-conditioning system and variable refrigerant flow air-conditioning system
CN105823213A (en) * 2016-05-13 2016-08-03 艾欧史密斯(中国)热水器有限公司 Heat-pump water heater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107576107A (en) * 2017-07-18 2018-01-12 广东美的暖通设备有限公司 A kind of method for preventing heat exchanger from freezing, system and air cooling module unit
CN108131806A (en) * 2017-12-21 2018-06-08 海信(山东)空调有限公司 Temprature control method and line control machine
CN109059376A (en) * 2018-08-13 2018-12-21 珠海格力电器股份有限公司 A kind of full frequency conversion heat pump system constant temperature water supply control method and system
CN112484248A (en) * 2020-11-02 2021-03-12 珠海格力电器股份有限公司 Air conditioner device control method and device and air conditioner

Similar Documents

Publication Publication Date Title
CN106766366A (en) Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning
CN106766365A (en) Frequency conversion air-cooled heat pump water chiller-heater system and its control method and air-conditioning
CN102927715B (en) Multiple-on-line heat pump air-conditioning system and method for controlling multiple-on-line heat pump air-conditioning system
CN103994598B (en) Pure electric vehicle heat pump
CN104729029A (en) Air conditioning system and control method thereof
CN104729163B (en) Air-conditioning system and its defrosting control method
CN104567135A (en) Air conditioning device
CN203533802U (en) Air-conditioning system
CN201547994U (en) Air conditioner
CN103216981A (en) Frostless air handling unit and proportion-integration-differential control method thereof
CN101726132A (en) Air conditioner
CN101545689B (en) Air conditioning apparatus
CN106608157A (en) Air conditioner system and air conditioner control method
US20200116391A1 (en) Furnace for a rooftop unit
CN106642787A (en) Refrigerating or heating pump system with adjustable refrigerant circulation quantity
CN106379133A (en) Energy storage device of heat pump type double-energy storage electric vehicle air conditioner
CN103842743B (en) Heat pump
CN204154039U (en) Aircondition
CN206556168U (en) Energy-efficient air energy two-shipper heat pump type air conditioning system
CN103615836A (en) Screw type total heat recovery air cooled heat pump air conditioning unit
CN203595316U (en) Screw rod type total heat recovery air-cooled heat pump air conditioning unit
JP2005016881A (en) Air conditioning system
CN107044699A (en) A kind of intelligent water cold mould thermostatic and humidistatic air conditioning unit and its temperature and humidity regulation method
CN106642470A (en) Water-cooling type thermostatic and humidity-static air conditioner
CN2508167Y (en) Condensed heat recovering device for central conditioning system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170531

RJ01 Rejection of invention patent application after publication