CN100386580C - Heat pump air conditioner system and its steam jet control device and method - Google Patents

Heat pump air conditioner system and its steam jet control device and method Download PDF

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Publication number
CN100386580C
CN100386580C CNB2006100349431A CN200610034943A CN100386580C CN 100386580 C CN100386580 C CN 100386580C CN B2006100349431 A CNB2006100349431 A CN B2006100349431A CN 200610034943 A CN200610034943 A CN 200610034943A CN 100386580 C CN100386580 C CN 100386580C
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CN
China
Prior art keywords
compressor
pressure
temperature
expansion valve
electric expansion
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CNB2006100349431A
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Chinese (zh)
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CN1828186A (en
Inventor
苏玉海
刘桂平
孙常权
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珠海格力电器股份有限公司
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Priority to CNB2006100349431A priority Critical patent/CN100386580C/en
Publication of CN1828186A publication Critical patent/CN1828186A/en
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Publication of CN100386580C publication Critical patent/CN100386580C/en

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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
    • 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
    • F25B49/022Compressor control arrangements
    • 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
    • F25B1/00Compression machines, plant, or systems with non-reversible cycle
    • F25B1/10Compression machines, plant, or systems with non-reversible cycle with multi-stage compression
    • 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
    • F25B2313/023Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple indoor units
    • 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
    • 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
    • F25B2400/13Economisers
    • 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
    • F25B2500/00Problems to be solved
    • F25B2500/19Calculation of parameters
    • 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
    • F25B2500/00Problems to be solved
    • F25B2500/31Low ambient temperatures
    • 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
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • F25B2600/027Compressor control by controlling pressure
    • F25B2600/0272Compressor control by controlling pressure the suction pressure
    • 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
    • F25B2700/19Pressures
    • F25B2700/193Pressures of the compressor
    • F25B2700/1931Discharge pressures
    • 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
    • F25B2700/19Pressures
    • F25B2700/193Pressures of the compressor
    • F25B2700/1933Suction pressures
    • 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
    • F25B2700/2115Temperatures of a compressor or the drive means therefor
    • F25B2700/21151Temperatures of a compressor or the drive means therefor at the suction side of the compressor
    • 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
    • F25B2700/2115Temperatures of a compressor or the drive means therefor
    • F25B2700/21152Temperatures of a compressor or the drive means therefor at the discharge side of the compressor

Abstract

The present invention discloses an air conditioning system with a heat pump, which has good heating effect in the working condition of outdoor ultralow temperature. The present invention comprises a compressor, a four-way valve, heat exchangers for an indoor and an outdoor machines, and a main throttling device which are connected by pipelines, wherein the compressor is provided with an air outlet and two air suction inlets; the front and the back parts of the main throttling device are re induced with bypass pipes connected to a second air suction inlet; the air conditioning system comprises a steam-jet controller which comprises at least three sensors and at least one electronic expansion valve; the sensors are respectively positioned at the air outlet and the two air suction inlets of the compressor; the electronic expansion valve is positioned on the bypass pipe. The present invention accurately controls the jet quantity of refrigerant by detecting the pressure of a jet opening of the compressor so as to increase the heating effect and the energy efficiency ratio of a machine set in the working condition of outdoor low temperature, accurately control the opening degree of the electronic expansion valve, reduce the fluctuation spread of indoor temperature, and enhance indoor comfort.

Description

A kind of heat pump type air conditioning system and vapour injection control device and control method
Technical field
The present invention relates to the air source heat pump air-conditioner field, refer more particularly to the heat pump type air conditioning system that under outdoor ultralow temperature operating mode, has good heating effect.
Background technology
At present, the normal air source heat pump air-conditioner of selling on the market, under the operating mode of outdoor low temperature, the heating capacity decay is very serious, even can't normally start operation, therefore at the northern China cold district, air source heat pump air-conditioner can only use at transition season, almost can't satisfy basic heat demand in case enter cold winter air source heat pump air-conditioner.As everyone knows, the traditional central heating mode of northern China is based on coal-fired, combustion gas, and these heating systems all can't reach the requirement of social development at energy-saving and environmental protection, secure context.So need a kind of super low temperature heat pump air-conditioning unit of exploitation to be used for replacing the traditional central heating mode of northern China.
Summary of the invention
The present invention has overcome shortcoming of the prior art, and a kind of heat pump type air conditioning system that can have good heating effect under outdoor ultralow temperature operating mode is provided.
The present invention also provides a kind of and can realize spraying to the vapour injection control device of heat pump air conditioner compressor vapour injection amount control.
In addition, the present invention also provides a kind of control method of vapour injection control device.
In order to solve the problems of the technologies described above, be achieved through the following technical solutions:
A kind of heat pump type air conditioning system, comprise compressor, cross valve, indoor set heat exchanger and off-premises station heat exchanger, main throttling arrangement, each parts connects by pipeline, described compressor has a gas outlet and two air entries, before or after described main throttling arrangement, draw a bypass pipe is arranged, insert second air entry of described compressor, described air-conditioning system comprises a vapour injection control device, described vapour injection control device comprises at least three sensors and at least one electric expansion valve, described sensor lays respectively at described compressor one gas outlet and described two air entries, and described electric expansion valve is positioned on the described bypass pipe.
Also between main throttling arrangement and outdoor heat exchanger, be connected to a reservoir in the described system.
Described bypass pipe is provided with a coil pipe.
Described coil pipe places in the described reservoir.
Be connected to a secondary cooling coil between described reservoir and the outdoor heat exchanger.
In the described system, between main throttling arrangement and outdoor heat exchanger, be provided with an auxiliary throttling arrangement.
Described sensor is pressure sensor or temperature sensor.
A kind of vapour injection control device, be applied to a kind of heat pump type air conditioning system, among described system, comprise that one has the compressor of two air entries and a gas outlet, cross valve, indoor set heat exchanger and off-premises station heat exchanger, main throttling arrangement, each parts forms a cooling and warming circulation, before or after described main throttling arrangement, draw a bypass pipe is arranged, described vapour injection control device comprises at least three sensors and at least one electric expansion valve, described sensor lays respectively at described compressor one gas outlet and described two air entries, and described electric expansion valve is positioned on the described bypass pipe.
A kind of control method of vapour injection control device, described method detects the state of turnover compressor gas by the air entry that is arranged on described compressor, the sensor of gas outlet, control the aperture of the electric expansion valve that is connected with second air entry according to the variation of described turnover compressor gas state, thereby control the emitted dose of described steam.
Described sensor is a pressure sensor, and described method comprises following process:
(1) described pressure sensor detects the pressure of compressor first air entry, second air entry and gas outlet gas respectively, corresponds to P Low, P Spray, P High
(2) according to the relation of pressure and temperature, try to achieve P Low, P Spray, P HighCorresponding temperature is respectively T Low, T Spray, T High
(3) the intermediate pressure P in the described compressor operating process of calculating In, According to the relation of pressure and temperature, trying to achieve corresponding temperature is T In
(4) calculate the pressure temperature difference T corresponding that ejects from described compressor second air entry with the actual pressure differential of compressor intermediate pressure Actual, Δ T Actual=T Spray-T In
(5) the aperture variable quantity N=Δ T of described electric expansion valve Target-Δ T Actual, wherein, Δ T TargetThe temperature difference for the target pressure reduction correspondence set;
(6) the actual aperture of electric expansion valve be original aperture of electric expansion valve and aperture variable quantity N and.
Described sensor is a temperature sensor, and described method comprises following process:
(1) described temperature sensor detects the temperature of compressor first air entry, second air entry and gas outlet gas respectively, corresponds to T Low, T Spray, T High
(2) according to the relation of pressure and temperature, try to achieve T Low, T Spray, T HighCorresponding pressure is respectively P Low, P Spray, P High
(3) the intermediate pressure P in the described compressor operating process of calculating In, According to the relation of pressure and temperature, trying to achieve corresponding temperature is T In
(4) calculate the pressure temperature difference T corresponding that ejects from described compressor second air entry with the actual pressure differential of compressor intermediate pressure Actual, Δ T Actual=T Spray-T In
(5) the aperture variable quantity N=Δ T of described electric expansion valve Target-Δ T Actual, wherein, Δ T TargetThe temperature difference for the target pressure reduction correspondence set;
(6) the actual aperture of electric expansion valve be original aperture of electric expansion valve and aperture variable quantity N and.
Compared with prior art, the invention provides a kind of heat pump type air conditioning system that can under outdoor ultralow temperature operating mode, have good heating effect.Adopt the refrigerant vapour of steam injection system control compressor injection intermediate pressure, and compressor ejector refrigeration dosage is reached optimum value by the pressure control of jet (compressor second air entry).Identically with common heat-pump air-conditioner group under nominal situation freeze, heating operation; When outdoor environment temperature reduces, during the heating capacity decay, steam injection system plays a role in the unit, compressor is sprayed the saturated refrigerant gas of intermediate pressure, in inner twin-stage compression, heating capacity and the Energy Efficiency Ratio of raising unit under outdoor worst cold case of realizing of compressor.Simultaneously, in the system delivery temperature of compressor pressure ratios and unit all in reasonable range, stable, reliable; Unit adopts the intelligent defrosting pattern, whether enters the defrost operation by system high pressure control unit, can accomplish the stage of " frostless do not change ".
The present invention is applied in the heat pump air conditioner unit, accurately controls the refrigerant injection amount by detecting compressor jet pressure, improves heating effect and the Energy Efficiency Ratio of unit under outdoor worst cold case; Unit defrost number of times and time are significantly reduced, and the unit operation heating effect is higher, and is more energy-conservation; Accurately the control electronic expansion valve opening reduces the fluctuations in indoor temperature amplitude, and indoor comfort strengthens.
Description of drawings
Fig. 1 is the principle schematic of heat pump type air conditioning system embodiment one;
Fig. 2 is a heat pump type air conditioning system heating operation pressure-enthalpy chart;
Fig. 3 is the principle schematic of heat pump type air conditioning system embodiment three.
The specific embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Embodiment one:
See also Fig. 1, the inner expression heat pump type air conditioning system that divides of frame of broken lines among Fig. 1, the flow direction of cold-producing medium when the solid line of band arrow represents that heat pump type air conditioning system heats among the figure.A kind of heat pump type air conditioning system, comprise compressor 11, gas-liquid separator 12, cross valve 13, indoor set heat exchanger 19, off-premises station heat exchanger 14, secondary cooling coil 16, reservoir 17, main throttling arrangement 15A, auxiliary throttling arrangement 15, link together by copper pipe between each parts and form a cooling and warming circulation.Wherein, compressor 11 comprises a gas outlet 113 and first air entry 111,112 two air entries of second air entry.Compressor 11 is the air injection enthalpy-increasing digital scroll compressor, and main throttling arrangement 15A is an electric expansion valve.
Described system comprises that also one draws behind main throttling arrangement 15A, be connected into the bypass pipe of compressor 11 second air entries 112, is connected with a coil pipe 18 on described bypass pipe, and described coil pipe 18 places in the described reservoir 17.
Described system also comprises a vapour injection control device, and described vapour injection control device comprises that three pressure sensors and 21, three pressure sensors of an electric expansion valve are respectively low pressure sensor 201, high pressure sensor 202, expulsion pressure sensor 203.High pressure sensor 202 places the gas outlet 113 of compressor 11, and low pressure sensor 201 places first air entry 111 of compressor 11, and expulsion pressure sensor 203 places second air entry 112 of compressor 11, and electric expansion valve 21 is arranged on the described bypass pipe.When the heat pump type air conditioning system processing heats state, the cold-producing medium that flows out from indoor set heat exchanger 19 is divided into two-way, a part is through the electric expansion valve 21 on the described bypass pipe and place coil pipe 18 in the reservoir 17, is sucked by second air entry 112 of compressor 11 then; Another part cold-producing medium then directly enters reservoir, through secondary cooling coil 16 of off-premises station and the outer machine heat exchanger 14 of auxiliary throttling arrangement 15 inlet chambers.
The operation principle of vapour injection control device is: detect the pressure of turnover compressor gas by the air entry that is arranged on compressor, the pressure sensor of gas outlet, the aperture of the electric expansion valve that is connected with second air entry is controlled in variation according to turnover compressor gas pressure, thereby controls the emitted dose of steam.Specifically comprise following process:
(1) pressure sensor detects the pressure of compressor first air entry, second air entry and gas outlet gas respectively, corresponds to P Low, P Spray, P High
(2) according to the relation of pressure and temperature, try to achieve P Low, P Spray, P HighCorresponding temperature is respectively T Low, T Spray, T High
(3) the intermediate pressure P in the calculating compressor operating process In, According to the relation of pressure and temperature, trying to achieve corresponding temperature is T In
(4) calculate the pressure temperature difference T corresponding that ejects from compressor second air entry with the actual pressure differential of compressor intermediate pressure Actual, Δ T Actual=T Spray-T In
(5) the aperture variable quantity N=Δ T of electric expansion valve Target-Δ T Actual, wherein, Δ T TargetThe temperature difference for the target pressure reduction correspondence set;
(6) the actual aperture of electric expansion valve be original aperture of electric expansion valve and aperture variable quantity N and.
Introduce the course of work of heat pump type air conditioning system below by Fig. 2, the 1-9 among Fig. 1 is the state point corresponding with Fig. 2.System is under outdoor worst cold case during heating operation, compressor is compressed to the refrigerant gas (state point 1) of the low-temp low-pressure that is evaporated from the off-premises station heat exchanger state point 2 of intermediate pressure, gas (state point 9) with the intermediate pressure that sucks from compressor second air entry in the scroll plate of compressor is mixed into state point 10, continues then by the gas of compressor boil down to HTHP (state point 3); The refrigerant liquid (state point 4) that the refrigerant gas of HTHP is cooled in the indoor set heat exchanger and is condensed into HTHP, highly pressurised liquid is gas-liquid mixture (state point 5) by indoor set electric expansion valve 15A throttling step-down; This moment, cold-producing medium was divided into two-way, a part enters the interior coil pipe of reservoir through the electric expansion valve throttling for the intermediate pressure refrigerant gas-liquid mixture, the outer cold-producing medium heat of vaporization of absorption coil is that intermediate pressure saturated vapor (state point 9) is sucked by compressor second air entry, another part cold-producing medium then directly enters in the container between reservoir shell and the coil pipe, carries out heat exchange with cold-producing medium in the coil pipe and emits heat and be condensed into subcooled liquid (state point 6) through the secondary cooling coil of off-premises station; Subcooled liquid is throttled to state point 7 by the off-premises station electric expansion valve, and the outer machine heat exchanger of inlet chamber is evaporated to state point 1 and is sucked by the compressor air entry then, finishes one and heats circulation.
The operation principle of whole heat pump type air conditioning system is: identically with common heat-pump air-conditioner group under nominal situation freeze, heating operation; When outdoor environment temperature reduces, during the heating capacity decay, the vapour injection control device plays a role in the unit, compressor is sprayed the saturated refrigerant gas of intermediate pressure, in inner twin-stage compression, heating capacity and the Energy Efficiency Ratio of raising unit under outdoor worst cold case of realizing of compressor.Simultaneously, the delivery temperature of compressor pressure ratios and unit is all in reasonable range in the system, and the reliability of unit operation is reliable and stable through a large amount of experimental verifications; Unit adopts the intelligent defrosting pattern, whether enters the defrost operation by system high pressure control unit, can accomplish the stage of " frostless do not change ".
Embodiment two:
The difference of present embodiment and embodiment one is that the sensor that the vapour injection control device in the present embodiment adopts is a temperature sensor, adopt the operation principle of the vapour injection control device of temperature sensor to be: to detect the temperature of turnover compressor gas by the air entry that is arranged on compressor, the temperature sensor of gas outlet, the aperture of the electric expansion valve that control is connected with second air entry according to turnover compressor gas variation of temperature, thereby the emitted dose of control steam.Specifically comprise following process:
(1) temperature sensor detects the temperature of compressor first air entry, second air entry and gas outlet gas respectively, corresponds to T Low, T Spray, T High
(2) according to the relation of pressure and temperature, try to achieve T Low, T Spray, T HighCorresponding pressure is respectively P Low, P Spray, P High
(3) the intermediate pressure P in the calculating compressor operating process In, According to the relation of pressure and temperature, trying to achieve corresponding temperature is T In
(4) calculate the pressure temperature difference T corresponding that ejects from compressor second air entry with the actual pressure differential of compressor intermediate pressure Actual, Δ T Actual=T Spray-T In
(5) the aperture variable quantity N=Δ T of electric expansion valve Target-Δ T Actual, wherein, Δ T TargetThe temperature difference for the target pressure reduction correspondence set;
(6) the actual aperture of electric expansion valve be original aperture of electric expansion valve and aperture variable quantity N and.
Embodiment three:
As shown in Figure 3, the difference of present embodiment and embodiment one is, secondary cooling coil 16, reservoir 17 are not set in the present embodiment system, does not also have coil pipe 18 on bypass pipe.In addition, described bypass pipe can directly be drawn from the outlet of indoor set heat exchanger.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only.Can replace with common capillary as the throttling arrangement electric expansion valve, indoor set can be one; In addition, described bypass pipe can directly be drawn from the outlet of indoor set heat exchanger.Therefore, do not break away from any modification or partial replacement of spirit and scope of the invention, all should be encompassed in the middle of the claim scope of the present invention.

Claims (11)

1. heat pump type air conditioning system, comprise compressor, cross valve, indoor set heat exchanger and off-premises station heat exchanger, main throttling arrangement, each parts connects by pipeline, described compressor has a gas outlet and two air entries, before or after described main throttling arrangement, draw a bypass pipe is arranged, insert second air entry of described compressor, it is characterized in that, described air-conditioning system comprises a vapour injection control device, described vapour injection control device comprises at least three sensors and at least one electric expansion valve, described sensor lays respectively at described compressor one gas outlet and described two air entries, and described electric expansion valve is positioned on the described bypass pipe.
2. heat pump type air conditioning system according to claim 1 is characterized in that, also is connected to a reservoir in the described system between main throttling arrangement and outdoor heat exchanger.
3. heat pump type air conditioning system according to claim 2 is characterized in that described bypass pipe is provided with a coil pipe.
4. heat pump type air conditioning system according to claim 3 is characterized in that described coil pipe places in the described reservoir.
5. according to claim 2 or 3 or 4 described heat pump type air conditioning systems, it is characterized in that, be connected to a secondary cooling coil between described reservoir and the outdoor heat exchanger.
6. according to claim 1 or 2 or 3 or 4 described heat pump type air conditioning systems, it is characterized in that, in the described system, between main throttling arrangement and outdoor heat exchanger, be provided with an auxiliary throttling arrangement.
7. according to claim 1 or 2 or 3 or 4 described heat pump type air conditioning systems, it is characterized in that described sensor is pressure sensor or temperature sensor.
8. vapour injection control device, be applied to a kind of heat pump type air conditioning system, among described system, comprise that one has the compressor of two air entries and a gas outlet, cross valve, indoor set heat exchanger and off-premises station heat exchanger, main throttling arrangement, each parts forms a cooling and warming circulation, before or after described main throttling arrangement, draw a bypass pipe is arranged, it is characterized in that, described vapour injection control device comprises at least three sensors and at least one electric expansion valve, described sensor lays respectively at described compressor one gas outlet and described two air entries, and described electric expansion valve is positioned on the described bypass pipe.
9. the control method of the described vapour injection control device of claim 8, it is characterized in that, described method detects the state of turnover compressor gas by the air entry that is arranged on described compressor, the sensor of gas outlet, control the aperture of the electric expansion valve that is connected with second air entry according to the variation of described turnover compressor gas state, thereby control the emitted dose of described steam.
10. the control method of vapour injection control device according to claim 9 is characterized in that, described sensor is a pressure sensor, and described method comprises following process:
(1) described pressure sensor detects the pressure of compressor first air entry, second air entry and gas outlet gas respectively, corresponds to P Low, P Spray, P High
(2) according to the relation of pressure and temperature, try to achieve P Low, P Spray, P HighCorresponding temperature is respectively T Low, T Spray, T High
(3) the intermediate pressure P in the described compressor operating process of calculating In, According to the relation of pressure and temperature, trying to achieve corresponding temperature is T In
(4) calculate the pressure temperature difference T corresponding that ejects from described compressor second air entry with the actual pressure differential of compressor intermediate pressure Actual, Δ T Actual=T Spray-T In
(5) the aperture variable quantity N=Δ T of described electric expansion valve Target-Δ T Actual, wherein, Δ T TargetThe temperature difference for the target pressure reduction correspondence set;
(6) the actual aperture of electric expansion valve be original aperture of electric expansion valve and aperture variable quantity N and.
11. the control method of vapour injection control device according to claim 9 is characterized in that, described sensor is a temperature sensor, and described method comprises following process:
(1) described temperature sensor detects the temperature of compressor first air entry, second air entry and gas outlet gas respectively, corresponds to T Low, T Spray, T High
(2) according to the relation of pressure and temperature, try to achieve T Low, T Spray, T HighCorresponding pressure is respectively P Low, P Spray, P High
(3) the intermediate pressure P in the described compressor operating process of calculating In, According to the relation of pressure and temperature, trying to achieve corresponding temperature is T In
(4) calculate the pressure temperature difference T corresponding that ejects from described compressor second air entry with the actual pressure differential of compressor intermediate pressure Actual, Δ T Actual=T Spray-T In
(5) the aperture variable quantity N=Δ T of described electric expansion valve Target-Δ T Actual, wherein, Δ T TargetThe temperature difference for the target pressure reduction correspondence set;
(6) the actual aperture of electric expansion valve be original aperture of electric expansion valve and aperture variable quantity N and.
CNB2006100349431A 2006-04-11 2006-04-11 Heat pump air conditioner system and its steam jet control device and method CN100386580C (en)

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Application Number Priority Date Filing Date Title
CNB2006100349431A CN100386580C (en) 2006-04-11 2006-04-11 Heat pump air conditioner system and its steam jet control device and method

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
CNB2006100349431A CN100386580C (en) 2006-04-11 2006-04-11 Heat pump air conditioner system and its steam jet control device and method
PL07720698T PL2009369T3 (en) 2006-04-11 2007-04-06 A heat pump air condition system, and the steam jet system and the control method thereof
EP07720698.5A EP2009369B1 (en) 2006-04-11 2007-04-06 A heat pump air condition system, and the steam jet system and the control method thereof
PCT/CN2007/001125 WO2007115494A1 (en) 2006-04-11 2007-04-06 A heat pump air condition system, and the steam jet system and the control method thereof
TR2018/20044T TR201820044T4 (en) 2006-04-11 2007-04-06 II KLÍMA pump system and the related control system and steam jet METHOD
ES07720698T ES2705478T3 (en) 2006-04-11 2007-04-06 An air conditioning system with heat pump, and the steam jet system and the control method thereof
RU2008143066/06A RU2426956C2 (en) 2006-04-11 2007-04-06 Air conditioning system with use of heat pump and control method of above system

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TR201820044T4 (en) 2019-02-21
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RU2008143066A (en) 2010-05-10
WO2007115494A1 (en) 2007-10-18
EP2009369B1 (en) 2018-10-31
EP2009369A1 (en) 2008-12-31
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CN1828186A (en) 2006-09-06
PL2009369T3 (en) 2019-05-31

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