CN105698426A - Air conditioning system and control method of air conditioning system - Google Patents

Air conditioning system and control method of air conditioning system Download PDF

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Publication number
CN105698426A
CN105698426A CN201610122018.8A CN201610122018A CN105698426A CN 105698426 A CN105698426 A CN 105698426A CN 201610122018 A CN201610122018 A CN 201610122018A CN 105698426 A CN105698426 A CN 105698426A
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CN
China
Prior art keywords
valve
control valve
air
conditioning system
positive displacement
Prior art date
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Pending
Application number
CN201610122018.8A
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Chinese (zh)
Inventor
周训
林竹
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
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Priority to CN201610122018.8A priority Critical patent/CN105698426A/en
Publication of CN105698426A publication Critical patent/CN105698426A/en
Pending legal-status Critical Current

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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
    • F25B1/00Compression machines, plants or systems with non-reversible cycle
    • F25B1/06Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure
    • F25B1/08Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure using vapour under 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
    • F25B13/00Compression machines, plants 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
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • 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, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741Compression machines, plants 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
    • F25B2600/00Control issues
    • F25B2600/25Control of valves

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

The invention discloses an air conditioning system and a control method of the air conditioning system. The air conditioning system comprises a jet variable capacitance compressor, a reversing assembly, two heat exchangers and a flash evaporator, wherein a first air suction opening in the jet variable capacitance compressor is communicated with a liquid storage device; a first channel is connected between a second air suction opening and an air exhaust opening; a first control valve is connected in series onto the first channel; the liquid storage device is communicated with the second air suction opening through a second channel; a second control valve is connected in series onto the second channel; the first control valve and the second control valve are alternatively opened to ensure communication between the second air suction opening and the air exhaust opening or an air return opening; the first air suction opening and the second suction opening are respectively communicated with the air suction channels of two air cylinders of a compression mechanism; and the compression mechanism is designed to operate in a single-cylinder or dual-cylinder manner. According to the air conditioning system provided by the invention, a dual-rotor enhanced vapor injection mode can be utilized at medium-high frequency, so as to realize high-capacity output; and the dual-rotor enhanced vapor injection mode is replaced by a mode of single-rotor enthalpy increasing by vapor supplement at low frequency, so as to realize low power and high energy efficiency.

Description

The control method of air conditioning system and air conditioning system
Technical field
The present invention relates to technical field of refrigeration equipment, especially relate to the control method of a kind of air conditioning system and air conditioning system。
Background technology
Since household inverter air conditioner releases market, because it can realize quickly regulating and energy-conservation of room temperature, obtain being widely recognized as of user。But being as the development of society, household inverter air conditioner is had higher requirement by people, for instance require: in southern high-temperature hot area, it may be achieved the powerful refrigeration of superhigh temperature;In low-temperature cold area, the north, it may be achieved ultralow temperature is powerful to be heated。Due to common household inverter air conditioner many uses single-rotor compressor, its bent axle single load bearing causes compressor assembly uneven so that vibration and noise are all relatively big, especially vibrates more prominent during compressor low-frequency operation, has a strong impact on complete machine reliability of operation。Because the restriction of vibration and noise, using the air-conditioner of single-rotor compressor, it is too high that its operation highest frequency can not promote, and thus makes the ability output of air-conditioner can not reach user's requirement。If adopting common two-spool compressor, although can partly solve problem above, but when superhigh temperature refrigeration and ultralow temperature heat, along with the increase of compressor pressure ratios, cylinder leakage rate also increases, and the overall performance of system sharply declines, and is unfavorable for energy-conservation。
Summary of the invention
It is contemplated that at least solve one of technical problem of existence in prior art。For this, the invention reside in a kind of air conditioning system of proposition, described air conditioning system can the output of big ability, high energy efficiency even running at low frequency under medium-high frequency。
The present invention also proposes the control method of a kind of above-mentioned air conditioning system。
Air conditioning system according to the present invention, including: jet positive displacement compressor, described jet positive displacement compressor includes housing, reservoir and the compression mechanism being located in described housing, described housing is provided with air vent, first air entry, second air entry and gas supplementing opening, described reservoir has gas returning port, described first air entry connects with described reservoir, it is connected to first passage between described second air entry and described air vent, described first passage is in series with the first control valve, described reservoir is connected with described second air entry by second channel, described second channel is in series with the second control valve, described first controls valve controls valve alternately unlatching so that described second air entry connects with described air vent or described gas returning port with described second, described first air entry connects with the air intake passage of two cylinders of described compression mechanism respectively with described second air entry, described compression mechanism is configured to run or twin-tub operation by single cylinder;Commutation assembly, described commutation assembly has the first valve port to the 4th valve port, one of them connection in described first valve port and the second valve port and the 3rd valve port, described 4th valve port connects with another in described second valve port and described 3rd valve port, described first valve port is connected with described air vent, and described 4th valve port is connected with described gas returning port;Two heat exchangers, the first end of said two heat exchanger is connected with described second valve port and described 3rd valve port respectively;Flash vessel, described flash vessel has gas outlet and two gateways, described gas outlet is connected with described gas supplementing opening, and said two gateway is connected with the second end of said two heat exchanger respectively, is in series with restricting element between each described gateway and corresponding described heat exchanger。
Air conditioning system according to the present invention, it is possible to use double-spool jet to increase enthalpy pattern when medium-high frequency, it is achieved big ability output, reduces vibration of compressor, reduces complete machine noise;Can also be single rotor Gas-supplying enthalpy-increasing pattern in low frequency time-varying birotor Gas-supplying enthalpy-increasing pattern, it is achieved low-power, high energy efficiency。
In some embodiments of the invention, described air conditioning system also includes the 3rd control valve, and the described 3rd controls valve is connected between described gas outlet and described gas supplementing opening。
Alternatively, described commutation assembly is cross valve。
Alternatively, each described restricting element is electric expansion valve。
Alternatively, described first controls valve and described second control valve respectively Unidirectional solenoid valve。
The control method of the air conditioning system according to the present invention, the ruuning situation according to described air conditioning system, when high frequency, control described first and control valve closedown and the second control valve unlatching, described jet positive displacement compressor uses birotor pattern;When low frequency, controlling described first control valve and open and described second control valve closedown, described jet positive displacement compressor uses single rotor pattern。
In some embodiments of the invention, described control method comprises the steps:
Step 1: preset correspondence first frequency value F1, single rotor pattern correspondence second frequency value F2 during described jet positive displacement compressor birotor pattern;
Step 2: detecting the actual motion frequency f of described jet positive displacement compressor, detection the first control valve and described second controls the running status of valve,
When described first controls valve closedown and described second control valve opens, jet positive displacement compressor is birotor pattern, enters step 3;When described first control valve is opened and described second controls valve closedown, described jet positive displacement compressor is single rotor pattern, enters step 4;
Step 3: compare f and F1, as f >=F1, keeps described first to control valve and described second and controls the running status of valve;As f < F1, controlling the first control valve and open and described second control valve closedown, described jet positive displacement compressor switches to single rotor pattern, and described jet positive displacement compressor frequency is adjusted to F2 simultaneously;
Step 4: compare f and F2, as f≤F2, keeps described first to control valve and described second and controls the running status of valve;As f > F2, controlling described first and control valve closedown and described second control valve unlatching, described jet positive displacement compressor switches to single rotor pattern, and described jet positive displacement compressor frequency is adjusted to F1 simultaneously。
Further, the span of described first frequency value F1 is 4Hz~40Hz, and the span of described second frequency value F2 is 8Hz~40Hz。
The additional aspect of the present invention and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention。
Accompanying drawing explanation
Fig. 1 is the schematic diagram when refrigeration mode of the air conditioning system according to embodiments of the present invention;
Fig. 2 is the schematic diagram when heating mode of the air conditioning system according to embodiments of the present invention;
Fig. 3 is the control flow chart of the control method of air conditioning system according to embodiments of the present invention。
Accompanying drawing labelling:
Air conditioning system 100,
Jet positive displacement compressor 1, air vent a, gas supplementing opening b, the first air entry c, the second air entry d,
Reservoir 11, gas returning port n,
Commutation assembly 2, the first valve port h, the second valve port i, the 3rd valve port j, the 4th valve port k,
First controls valve 31, and second controls valve 32, and the 3rd controls valve 33,
Outdoor heat exchanger 4, indoor heat exchanger 5,
Flash vessel 6, gas outlet r, the first gateway s, the second gateway t,
First throttle element 71, second section fluid element 72,
First passage 81, second channel 82。
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish。The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention。
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention。In order to simplify disclosure of the invention, hereinafter parts and setting to specific examples are described。Certainly, they are only merely illustrative, and are not intended to the restriction present invention。Additionally, the present invention can in different examples repeat reference numerals and/or letter。This repetition is for purposes of simplicity and clarity, the relation between itself not indicating discussed various embodiment and/or arranging。Additionally, the example of the various specific technique that the invention provides and material, but those of ordinary skill in the art are it can be appreciated that the use of the property of can be applicable to of other techniques and/or other materials。
Below with reference to Fig. 1-Fig. 3, air conditioning system 100 according to embodiments of the present invention is described。
As it is shown in figure 1, air conditioning system 100 according to embodiments of the present invention, including: jet positive displacement compressor 1, commutation 2, two heat exchangers of assembly (outdoor heat exchanger 4 as shown in Figure 1 and indoor heat exchanger 5) and flash vessel 6。
Specifically, jet positive displacement compressor 1 includes housing, reservoir 11 and the compression mechanism being located in housing, housing is provided with air vent a, gas supplementing opening b, first air entry c and the second air entry d, reservoir 11 has gas returning port n, first air entry c connects with reservoir 11, it is connected to first passage 81 between second air entry d and air vent a, first passage 81 is in series with the first control valve 31, reservoir 11 is connected with the second air entry d by second channel 82, second channel 82 is in series with the second control valve 32, first controls valve 31 controls valve 31 alternately unlatching so that the second air entry d and air vent a or gas returning port n connects with first, first air entry c and the second air entry d connects with the air intake passage of two cylinders of compression mechanism respectively, compression mechanism is configured to run or twin-tub operation by single cylinder。
As shown in Figure 1, first air entry c connects with reservoir 11 all the time, when the first control valve 31 is opened and the second control valve 32 is cut out, first passage 81 turns on, second channel 82 disconnects, second air entry d connects with air vent a, from air vent a discharge high pressure coolant through first passage 81 enter with in the second air entry d the second cylinder connected, now the second piston idle running is not compressed, coolant in reservoir 11 only enters in the first cylinder communicated therewith from the first air entry c and is compressed, and jet positive displacement compressor 1 single cylinder runs;When the second control valve 32 is opened and the first control valve 31 is cut out, second channel 82 turns on, first passage 81 disconnects, second air entry d connects with gas returning port n, now the coolant in reservoir 11 simultaneously enters in two cylinders compressing mechanism from the first air entry c and the second air entry d respectively and is compressed, and jet positive displacement compressor 1 twin-tub runs。Thus, it is possible to realize jet positive displacement compressor 1 switching between single cylinder runs and twin-tub runs。Need illustrate be, the jet positive displacement compressor 1 of the present invention can adopt the existing compressor with twin-tub operation and single cylinder operation both of which, the single cylinder of compressor runs and twin-tub runs switching principle, the contraction principle of coolant are prior art, are just not described in detail here。
Commutation assembly 2 has the first valve port h, the second valve port i, the 3rd valve port j and the four valve port k, one of them connection in first valve port h and the second valve port i and the 3rd valve port j, another connection in 4th valve port k and the second valve port i and the 3rd valve port j, that is, when the first valve port h and the second valve port i connects, 4th valve port k then connects with the 3rd valve port j, and when the first valve port h and the three valve port j connection, the 4th valve port k then connects with the second valve port i。
First valve port h is connected with air vent a, 4th valve port k is connected with gas returning port n, coolant enters reservoir 11 from the 4th valve port k cooled via return air mouth n of commutation assembly 2 and returns in jet positive displacement compressor 1, forms the coolant of High Temperature High Pressure, be expelled to the first valve port h from air vent a in cylinder after compression。
Preferably, commutation assembly 2 is cross valve, when air conditioning system 100 adopts refrigeration mode, first valve port h and the second valve port i connection, 3rd valve port j and the four valve port k connection, when air conditioning system 100 adopts heating mode, the first valve port h and the three valve port j connection, the second valve port i and the four valve port k connection。Certainly, the invention is not restricted to this, commutation assembly 2 can also be formed as other elements, as long as having the first valve port h to the 4th valve port k and can realizing commutating。
First end of two heat exchangers (the such as outdoor heat exchanger 4 shown in Fig. 1 and indoor heat exchanger 5) is connected with the second valve port i and the 3rd valve port j respectively。As it is shown in figure 1, the first end 4a and the second valve port i of outdoor heat exchanger 4 are connected, the first end 5a and the three valve port j of indoor heat exchanger 5 is connected。
Flash vessel 6 has gas outlet r and two gateways (such as the first gateway s shown in Fig. 1 and the second gateway t), gas outlet r is connected with gas supplementing opening b, so, can return to jet positive displacement compressor 1 from gas supplementing opening b from the isolated steam state coolant of flash vessel 6 and be compressed, to realize air injection enthalpy-increasing。
Two gateways are connected with the second end of two heat exchangers respectively, are in series with restricting element (such as the first throttle element 71 shown in Fig. 1 and second section fluid element 72) between each gateway and corresponding heat exchanger。As shown in Figure 1, first gateway s is connected with the second end 4b of outdoor heat exchanger 4, it is serially connected with first throttle element 71 between first gateway s and outdoor heat exchanger 4, second gateway t is connected with the second end 5b of indoor heat exchanger 5, and second be serially connected with second section fluid element 72 between gateway t and indoor heat exchanger 5, wherein, first throttle element 71 and second section fluid element 72 all play the effect of reducing pressure by regulating flow。
Preferably, each restricting element can be electric expansion valve。Certainly, the invention is not restricted to this, restricting element can also be the structures such as the combination of capillary tube or capillary tube and electric expansion valve, as long as the effect of reducing pressure by regulating flow can be played。
Air conditioning system 100 according to embodiments of the present invention, it is possible to use double-spool jet to increase enthalpy pattern when medium-high frequency, it is achieved big ability output, reduces vibration of compressor, reduces complete machine noise;Can also be single rotor Gas-supplying enthalpy-increasing pattern in low frequency time-varying birotor Gas-supplying enthalpy-increasing pattern, it is achieved low-power, high energy efficiency。
In one embodiment of the invention, air conditioning system 100 can also include the 3rd control valve 33, and the 3rd controls valve 33 is connected between gas outlet r and gas supplementing opening b。Thus can passing through the 3rd control valve 33 and control whether connection gas outlet r and gas supplementing opening b, the steam state coolant quantity to control to enter jet positive displacement compressor 1 can choose whether to carry out air injection enthalpy-increasing according to practical situation。
In one embodiment of the invention, first controls valve 31 and second controls valve 32 respectively Unidirectional solenoid valve, thus can ensure that coolant one-way flow, thus the refrigerant return being prevented effectively from cylinder。
The control method of air conditioning system 100 according to embodiments of the present invention, the ruuning situation according to air conditioning system 100, when high frequency, control the first control valve 31 cuts out and the second control valve 32 is opened, and jet positive displacement compressor 1 uses birotor pattern;When low frequency, control the first control valve 31 is opened and the second control valve 32 cuts out, and jet positive displacement compressor 1 uses single rotor pattern。
The control method of the air conditioning system 100 according to the present invention, adopts double-spool jet to increase enthalpy operational mode in medium-high frequency system, especially at superhigh temperature and ultralow temperature, realizes the output of big ability during high compression ratio, improves cooling and warming speed;The automatic switchover single rotor air injection enthalpy-increasing operational mode when low frequency, bypass falls a rotor, not only vibrates little, and realizes low-power, when air conditioner load is less, can realize not shutting down work, keep the stability of temperature, and temperature difference fluctuation is little, energy-conservation, comfortable。
Further, described control method comprises the steps:
Step 1: preset correspondence first frequency value F1, single rotor pattern correspondence second frequency value F2 during jet positive displacement compressor 1 birotor pattern;
Step 2: the actual motion frequency f of detection jet positive displacement compressor 1, the running status of detection the first control valve 31 and the second control valve 32,
When the first control valve 31 cuts out and the second control valve 32 opens, jet positive displacement compressor 1 is birotor pattern, enters step 3;When the first control valve 31 is opened and the second control valve 32 is cut out, jet positive displacement compressor 1 is single rotor pattern, enters step 4;
Step 3: compare f and F1, as f >=F1, keeps the running status of the first control valve 31 and the second control valve 32;As f < F1, control the first control valve 31 is opened and the second control valve 32 cuts out, and jet positive displacement compressor 1 switches to single rotor pattern, and jet positive displacement compressor 1 frequency is adjusted to F2 simultaneously;
Step 4: compare f and F2, as f≤F2, keeps the running status of the first control valve 31 and the second control valve 32;As f > F2, control the first control valve 31 cuts out and the second control valve 32 is opened, and jet positive displacement compressor 1 switches to birotor pattern, and jet positive displacement compressor 1 frequency is adjusted to F1 simultaneously。
Preferably, the span of first frequency value F1 is 4Hz~40Hz, and the span of second frequency value F2 is 8Hz~40Hz。Thus, it is possible to improve the efficiency of jet positive displacement compressor 1。
Below with reference to Fig. 1-Fig. 3, the air conditioning system 100 according to one specific embodiment of the present invention is described。
With reference to Fig. 1, air conditioning system 100 includes jet positive displacement compressor 1, commutation assembly 2, outdoor heat exchanger 4, indoor heat exchanger 5, flash vessel 6, first throttle element 71, second section fluid element 72, first passage 81, second channel the 82, first control valve the 31, second control valve 32 and the 3rd control valve 33。Wherein, commutation assembly 2 is cross valve, and first throttle element 71 and second section fluid element 72 are electric expansion valve, and the first control valve 31 and the second control valve 32 are Unidirectional solenoid valve。
Specifically, as it is shown in figure 1, jet positive displacement compressor 1 includes housing, reservoir 11 and compression mechanism, housing is provided with air vent a, gas supplementing opening b, the first air entry c and the second air entry d, and reservoir 11 is provided with gas returning port n;Cross valve has the first valve port h, the second valve port i, the 3rd valve port j and the four valve port k, and flash vessel 6 has gas outlet r, the first gateway s and the second gateway t。
Wherein, the first air entry c connects with the air intake passage of reservoir 11 and the first cylinder, the air intake passage connection of the second air entry d and the second cylinder;Second air entry d and air vent a is connected by first passage 81, and first passage 81 is serially connected with the first control valve 31, and the second air entry d is connected by second channel 82 with reservoir 11, and second channel 82 is serially connected with the second control valve 32;First valve port h of cross valve is connected with air vent a;Second valve port i is connected with the first end 4a of outdoor heat exchanger 4, and the 3rd valve port j is connected with the first end 5a of indoor heat exchanger 5, and the 4th valve port k is connected with gas returning port n;The 3rd control valve 33 it is serially connected with between the gas outlet r and gas supplementing opening b of flash vessel 6, it is serially connected with first throttle element 71 between first gateway s and the second end 4b of outdoor heat exchanger 4, between the second gateway t and the second end 5b of indoor heat exchanger 5, concatenates second section fluid element 72。
As it is shown in figure 1, when air conditioning system 100 is refrigeration mode, the first valve port h and the second valve port i conducting of cross valve and the 4th valve port k and the 3rd valve port j turn on。
The flow direction of coolant is as follows: enter into condensation outdoor heat exchanger 4 from the air vent a of the jet positive displacement compressor 1 High Temperature High Pressure coolant discharged through the first valve port h and the second valve port i of cross valve, coolant carries out the second end 4b of heat exchanger 4 outdoor after heat exchange in outdoor heat exchanger 4 and discharges with outdoor environment, the liquid phase coolant being then discharged out is through the reducing pressure by regulating flow of first throttle element 71, gas-liquid two-phase coolant after throttling enters flash vessel 6 from the first gateway s, and carries out gas-liquid separation in flash vessel 6。
From flash vessel 6, isolated steam state coolant flows through the 3rd control valve 33 from gas outlet r, returns to jet positive displacement compressor 1 from gas supplementing opening b, discharges from the air vent a of jet positive displacement compressor 1 and proceed circulation after overcompression。
From flash vessel 6, isolated liquid refrigerants flows out from the second gateway t, then coolant enters in indoor heat exchanger 5 after the reducing pressure by regulating flow of second section fluid element 72, coolant carries out heat exchange with indoor environment in indoor heat exchanger 5 and undergoes phase transition, and indoor environment is freezed, user is made to obtain cryogenic temperature, the gas phase refrigerant that heat exchanger 5 is discharged indoor is through the 3rd valve port j and the four valve port k of cross valve, then enters reservoir 11 from gas returning port n, completes kind of refrigeration cycle。
As in figure 2 it is shown, when air conditioning system 100 is heating mode, the first valve port h and the three valve port j conducting of cross valve and the 4th valve port k and the second valve port i turn on。
The flow direction of coolant is as follows: from the air vent a of the jet positive displacement compressor 1 high pressure gaseous coolant discharged, enter in indoor heat exchanger 5 through the first valve port h and the three valve port j of cross valve, the coolant of the High Temperature High Pressure in indoor heat exchanger 5 and indoor environment carry out phase-change heat-exchange, so that indoor environment is heated, the liquid phase coolant that heat exchanger 5 is discharged indoor carries out first time throttling through second section fluid element 72, gas-liquid two-phase mixing coolant after throttling enters in flash vessel 6, and coolant is carried out gas-liquid separation by flash vessel 6。
From flash vessel 6, isolated steam state coolant flows through the 3rd control valve 33 from gas outlet r, returns to jet positive displacement compressor 1 from gas supplementing opening b, discharges from the air vent a of jet positive displacement compressor 1 and proceed circulation after overcompression。
From flash vessel 6, isolated liquid refrigerants flows out from the first gateway s, enter into after first throttle element 71 second throttle blood pressure lowering in outdoor heat exchanger 4, after refrigerant evaporation heat exchange in outdoor heat exchanger 4, the second valve port i and the four valve port k through cross valve, enter reservoir 11 from gas returning port n, complete to heat circulation。
As it is shown on figure 3, air conditioning system 100 is when freezing and heating, single birotor switching mode of jet positive displacement compressor 1 is as follows:
Step 1: set correspondence first frequency value F1, single rotor pattern correspondence second frequency value F2 during jet positive displacement compressor 1 birotor pattern;And the span of first frequency value F1 is 4Hz~40Hz, the span of second frequency value F2 is 8Hz~40Hz。
Step 2: the actual motion frequency of detection jet positive displacement compressor 1 is f, the running status of detection the first control valve 31 and the second control valve 32,
When the first control valve 31 cuts out and the second control valve 32 opens, first passage 81 disconnects, second channel 82 connects, second air entry d connects with reservoir 11, now, coolant enters compression in cylinder by the first air entry c and the second air entry d, jet positive displacement compressor 1 is birotor mode operation, enters step 3;When the first control valve 31 is opened and the second control valve 32 is cut out, first passage 81 connects, second channel 82 disconnects, and the second air entry d connects with air vent a, now, coolant only enters compression in cylinder by the first air entry c, and jet positive displacement compressor 1 is single rotor mode operation, enters step 4;
Step 3: compare f and F1, as f >=F1, keeps the running status of the first control valve 31 and the second control valve 32, keeps jet positive displacement compressor 1 birotor mode operation;As f < F1, control the first control valve 31 is opened and the second control valve 32 cuts out, and the second air entry d connects with air vent a, and jet positive displacement compressor 1 switches to single rotor pattern, and jet positive displacement compressor 1 frequency is adjusted to F2 simultaneously;
Step 4: compare f and F2, as f≤F2, keeps the running status of the first control valve 31 and the second control valve 32, keeps jet positive displacement compressor 1 single rotor mode operation;As f > F2, control the first control valve 31 cuts out and the second control valve 32 is opened, and the second air entry d connects with reservoir 11, and jet positive displacement compressor 1 switches to birotor pattern, and jet positive displacement compressor 1 frequency is adjusted to F1 simultaneously。
Air conditioning system 100 according to embodiments of the present invention, have employed the jet positive displacement compressor 1 of variable capacity, adopt double-spool jet to increase enthalpy operational mode in medium-high frequency air conditioning system 100, especially at superhigh temperature and ultralow temperature, realize the output of big ability during high compression ratio, improve cooling and warming speed;Automatically switching single rotor air injection enthalpy-increasing operational mode at low frequency spatiotemporal adjusting system 100, bypass falls a rotor, not only vibrates little; and realize low-power, when air conditioner load is less, can realize not shutting down work; keeping the stability of temperature, temperature difference fluctuation is little, energy-conservation, comfortable。
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, " interior ", " outward " be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention。
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic。Thus, define " first ", the feature of " second " can express or implicitly include one or more these features。In describing the invention, " multiple " are meant that two or more, unless otherwise expressly limited specifically。
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral;Can be mechanically connected, it is also possible to be electrical connection, it is also possible to be communication;Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals。For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be。
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact。And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature。Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature。
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention。In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example。And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner。Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art。
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: these embodiments can being carried out multiple change, amendment, replacement and modification when without departing from principles of the invention and objective, the scope of the present invention is limited by claim and equivalent thereof。

Claims (8)

1. an air conditioning system, it is characterised in that including:
Jet positive displacement compressor, described jet positive displacement compressor includes housing, reservoir and the compression mechanism being located in described housing, described housing is provided with air vent, first air entry, second air entry and gas supplementing opening, described reservoir has gas returning port, described first air entry connects with described reservoir, it is connected to first passage between described second air entry and described air vent, described first passage is in series with the first control valve, described reservoir is connected with described second air entry by second channel, described second channel is in series with the second control valve, described first controls valve controls valve alternately unlatching so that described second air entry connects with described air vent or described gas returning port with described second, described first air entry connects with the air intake passage of two cylinders of described compression mechanism respectively with described second air entry, described compression mechanism is configured to run or twin-tub operation by single cylinder;
Commutation assembly, described commutation assembly has the first valve port to the 4th valve port, one of them connection in described first valve port and the second valve port and the 3rd valve port, described 4th valve port connects with another in described second valve port and described 3rd valve port, described first valve port is connected with described air vent, and described 4th valve port is connected with described gas returning port;
Two heat exchangers, the first end of said two heat exchanger is connected with described second valve port and described 3rd valve port respectively;
Flash vessel, described flash vessel has gas outlet and two gateways, described gas outlet is connected with described gas supplementing opening, and said two gateway is connected with the second end of said two heat exchanger respectively, is in series with restricting element between each described gateway and corresponding described heat exchanger。
2. air conditioning system according to claim 1, it is characterised in that also include the 3rd control valve, the described 3rd controls valve is connected between described gas outlet and described gas supplementing opening。
3. air conditioning system according to claim 1, it is characterised in that described commutation assembly is cross valve。
4. air conditioning system according to claim 1, it is characterised in that each described restricting element is electric expansion valve。
5. air conditioning system according to claim 1, it is characterised in that described first controls valve and described second controls valve respectively Unidirectional solenoid valve。
6. the control method of the air conditioning system according to any one of claim 1-5, it is characterized in that, the ruuning situation according to described air conditioning system, when high frequency, controlling described first and control valve closedown and the second control valve unlatching, described jet positive displacement compressor uses birotor pattern;When low frequency, controlling described first control valve and open and described second control valve closedown, described jet positive displacement compressor uses single rotor pattern。
7. the control method of air conditioning system according to claim 6, it is characterised in that comprise the steps:
Step 1: preset correspondence first frequency value F1, single rotor pattern correspondence second frequency value F2 during described jet positive displacement compressor birotor pattern;
Step 2: detecting the actual motion frequency f of described jet positive displacement compressor, detection the first control valve and described second controls the running status of valve,
When described first controls valve closedown and described second control valve opens, jet positive displacement compressor is birotor pattern, enters step 3;When described first control valve is opened and described second controls valve closedown, described jet positive displacement compressor is single rotor pattern, enters step 4;
Step 3: compare f and F1, as f >=F1, keeps described first to control valve and described second and controls the running status of valve;As f < F1, controlling the first control valve and open and described second control valve closedown, described jet positive displacement compressor switches to single rotor pattern, and described jet positive displacement compressor frequency is adjusted to F2 simultaneously;
Step 4: compare f and F2, as f≤F2, keeps described first to control valve and described second and controls the running status of valve;As f > F2, controlling described first and control valve closedown and described second control valve unlatching, described jet positive displacement compressor switches to birotor pattern, and described jet positive displacement compressor frequency is adjusted to F1 simultaneously。
8. the control method of air conditioning system according to claim 7, it is characterised in that the span of described first frequency value F1 is 4Hz~40Hz, the span of described second frequency value F2 is 8Hz~40Hz。
CN201610122018.8A 2016-03-03 2016-03-03 Air conditioning system and control method of air conditioning system Pending CN105698426A (en)

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