CN105783310B

CN105783310B - Heating and air conditioner and its control method

Info

Publication number: CN105783310B
Application number: CN201610286093.8A
Authority: CN
Inventors: 李金波; 刘湍顺; 杨亚新; 陈明瑜; 任超; 孙兴; 曾祥兵
Original assignee: Midea Group Co Ltd; Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2016-04-29
Filing date: 2016-04-29
Publication date: 2019-07-30
Anticipated expiration: 2036-04-29
Also published as: CN105783310A

Abstract

The invention discloses a kind of heating and air conditioner and its control methods.Heating and air conditioner includes: duplex cylinder compressor, commutation component, outdoor heat exchanger, indoor heat exchanger, gas-liquid separator, refrigerant radiator, the air entry of first cylinder is connected to the first liquid storage device, and the value range of the delivery space ratio of the second cylinder and the first cylinder is 1%~10%；The component that commutates includes the first valve port to the 4th valve port, and the 4th valve port is connected with the first liquid storage device；Gas-liquid separator includes gas vent, first interface and second interface, gas vent is connected with the second cylinder, it is in series with the adjustable first throttle element of aperture between first interface and outdoor heat exchanger, adjustable second restricting element of aperture is in series between second interface and indoor heat exchanger.Refrigerant radiator tandem is between first throttle element and first interface；Or refrigerant radiator tandem is between the second restricting element and second interface.Heating and air conditioner of the invention, effectively improves energy efficiency of air conditioner.

Description

Heating and air conditioner and its control method

Technical field

The present invention relates to refrigerating fields, more particularly, to a kind of heating and air conditioner and its control method.

Background technique

Current air-conditioning refrigeration system does not optimize circulation to the gaseous refrigerant after throttling and into before evaporator Design causes gaseous refrigerant to influence evaporator heat exchange performance, and increases compressor compresses power consumption, to influence air conditioner Efficiency is horizontal.The heating capacity water of air-conditioning system at low and ultra-low temperatures can be improved in air injection enthalpy-increasing and Two-stage Compression technology It is flat, but for the cooling condition that air-conditioning is commonly used, efficiency is promoted very limited.

Summary of the invention

The present invention is directed to solve at least some of the technical problems in related technologies.

For this purpose, the present invention proposes a kind of heating and air conditioner, energy efficiency of air conditioner can effectively improve, effectively facilitate energy conservation and subtract Row.

The present invention also proposes a kind of control method of above-mentioned heating and air conditioner.

Heating and air conditioner according to an embodiment of the present invention, comprising: duplex cylinder compressor, the duplex cylinder compressor include shell Body, the first cylinder, the second cylinder and the first liquid storage device, the shell are equipped with exhaust outlet, first cylinder and described second Cylinder is respectively provided in the shell, and first liquid storage device is located at outside the shell, the air entry of first cylinder and institute State the connection of the first liquid storage device, the value range of the delivery space ratio of second cylinder and first cylinder is 1%~ 10%；Commutate component, and the commutation component includes the first valve port to the 4th valve port, first valve port and the second valve port and third One of connection in valve port, the 4th valve port are connected to another in second valve port and the third valve port, First valve port is connected with the exhaust outlet, and the 4th valve port is connected with first liquid storage device；Outdoor heat exchanger and room Interior heat exchanger, the first end of the outdoor heat exchanger are connected with second valve port, the first end of the indoor heat exchanger and institute Third valve port is stated to be connected；Gas-liquid separator, the gas-liquid separator include gas vent, first interface and second interface, described Gas vent is connected with the air entry of second cylinder, and the first interface is connected with the second end of the outdoor heat exchanger, The second interface is connected with the second end of the indoor heat exchanger, connects between the first interface and the outdoor heat exchanger There is the adjustable first throttle element of aperture, aperture adjustable second is in series between the second interface and the indoor heat exchanger Restricting element；Refrigerant radiator for radiating to electric control element, the refrigerant radiator tandem is in the first throttle Between element and the first interface；Or the refrigerant radiator tandem is in second restricting element and the second interface Between.

Heating and air conditioner according to an embodiment of the present invention can effectively improve sky by the way that above-mentioned duplex cylinder compressor is arranged Device efficiency is adjusted, energy-saving and emission-reduction are effectively facilitated, while by setting gas-liquid separator, heat exchange efficiency can be improved, reduce compressor Compression power consumption further increases air conditioner ability and efficiency, further through setting refrigerant radiator, can have to electric control element Effect cooling.

In some embodiments of the invention, the first throttle element is electric expansion valve, second restricting element For electric expansion valve.

In some embodiments of the invention, electricity is in series between the gas vent and the air entry of second cylinder Magnet valve.

In some embodiments of the invention, the value range of gas-liquid separator volume is 100mL-500mL.

In some embodiments of the invention, heating and air conditioner further includes the control being connected in parallel with the refrigerant radiator Valve processed, when refrigeration the control valve cut-off refrigerant circulation, refrigerant flows through the control valve when heating.

Further, the control valve is from second restricting element to single on the direction of the first throttle element To the check valve of conducting.

In some embodiments of the invention, the duplex cylinder compressor further includes the second liquid storage being located at outside the shell Device, second liquid storage device are connected between the gas vent and the air entry of second cylinder.

Preferably, the volume of first liquid storage device is greater than the volume of the second liquid storage device.

The control method of heating and air conditioner according to an embodiment of the present invention, heating and air conditioner are above-mentioned according to the present invention The heating and air conditioner of embodiment, when heating and air conditioner is run, in the first throttle element and second restricting element Restricting element positioned at upstream is level-one restricting element, is located at downstream in the first throttle element and second restricting element Restricting element be two-step throttle element, the control method includes the following steps: first according to inspection to the first test object Survey result adjusts the aperture of the level-one restricting element to aperture is set, then according to the testing result tune to the second test object The aperture of the whole two-step throttle element is less than the two-step throttle to aperture, the setting aperture of the level-one restricting element is set The setting aperture of element, the testing result of first test object are different from the testing result of second test object；Its Described in the first test object include outdoor environment temperature, the running frequency of duplex cylinder compressor, the delivery temperature of exhaust outlet, exhaust Mouthful pressure at expulsion, from the gas vent be discharged refrigerant intermediate pressure, from the gas vent be discharged refrigerant in Between at least one of temperature；Second test object includes outdoor environment temperature, the running frequency of duplex cylinder compressor, exhaust Mouthful delivery temperature, the pressure at expulsion of exhaust outlet, the refrigerant being discharged from the gas vent intermediate pressure, go out from the gas At least one of the medium temperature of refrigerant of mouth discharge.

The control method of heating and air conditioner according to an embodiment of the present invention, by the aperture for first adjusting level-one restricting element Then the aperture of two-step throttle element is adjusted again, so that the efficiency of system is optimal.

In some embodiments of the invention, first test object and second test object are outdoor environment Level-one throttling member is calculated according to the outdoor environment temperature T4 and running frequency F that detect in temperature T4 and running frequency F Then the setting aperture of part and two-step throttle element adjusts corresponding level-one restricting element and two-step throttle member according to setting aperture The aperture of part.

In some embodiments of the invention, first test object is outdoor environment temperature T4 and running frequency F, first The setting aperture of level-one restricting element is first calculated according to the outdoor environment temperature T4 and the running frequency F, then root The aperture of the level-one restricting element is adjusted according to setting aperture；Second test object is outdoor environment temperature T4, runs frequency Rate F and pressure at expulsion；Or second test object is outdoor environment temperature T4, running frequency F and delivery temperature, first root Setting pressure at expulsion or setting delivery temperature is calculated according to the outdoor environment temperature T4 and the running frequency F, then According to it is actually detected to pressure at expulsion or delivery temperature adjustment two-step throttle element aperture so that the exhaust detected Pressure or delivery temperature reach setting pressure at expulsion or setting delivery temperature.

In some embodiments of the invention, multiple outdoor temperature sections are preset, each outdoor temperature section is corresponding The aperture of different restricting elements, the first test object is outdoor environment temperature T4, according to the actually detected outdoor environment temperature arrived The aperture of the corresponding opening value adjustment level-one restricting element in outdoor temperature section where spending T4；Second test object is room External environment temperature T4, running frequency F and pressure at expulsion；Or second test object is outdoor environment temperature T4, operation frequency Rate F and delivery temperature, first according to the outdoor environment temperature T4 and the running frequency F be calculated setting pressure at expulsion or Person sets delivery temperature, then according to the actually detected pressure at expulsion arrived or the aperture of delivery temperature adjustment two-step throttle element So that the pressure at expulsion or delivery temperature that detect reach setting pressure at expulsion or setting delivery temperature.

In some embodiments of the invention, medium temperature or default intermediate pressure, first test object are preset For intermediate pressure, perhaps medium temperature adjusts level-one restricting element according to the actually detected intermediate pressure arrived or medium temperature Aperture is so that the intermediate pressure or medium temperature that detect reach default intermediate pressure or default medium temperature；Described Two test objects are outdoor environment temperature T4, running frequency F and pressure at expulsion；Or second test object is outdoor environment Temperature T4, running frequency F and delivery temperature are calculated according to the outdoor environment temperature T4 and the running frequency F first Setting pressure at expulsion perhaps sets delivery temperature and then adjusts second level according to the actually detected pressure at expulsion arrived or delivery temperature The aperture of restricting element is so that the pressure at expulsion or delivery temperature that detect reach setting pressure at expulsion or setting exhaust temperature Degree.

In some embodiments of the invention, medium temperature or default intermediate pressure, first test object are preset For intermediate pressure, perhaps medium temperature adjusts level-one restricting element according to the actually detected intermediate pressure arrived or medium temperature Aperture is so that the intermediate pressure or medium temperature that detect reach default intermediate pressure or default medium temperature；Described Two test objects are outdoor environment temperature T4 and running frequency F, first according to the outdoor environment temperature T4 and operation frequency The setting aperture of two-step throttle element is calculated in rate F, and the aperture of the two-step throttle element is then adjusted according to setting aperture.

In some embodiments of the invention, multiple outdoor temperature sections are preset, each outdoor temperature section is corresponding The aperture of different restricting elements, the first test object is outdoor environment temperature T4, according to the actually detected outdoor environment temperature arrived The aperture of the corresponding opening value adjustment level-one restricting element in outdoor temperature section where spending T4；Second test object is room Second level is calculated according to the outdoor environment temperature T4 and the running frequency F first in external environment temperature T4 and running frequency F Then the setting aperture of restricting element adjusts the aperture of the two-step throttle element according to setting aperture.

Detailed description of the invention

Fig. 1 is the schematic diagram according to the heating and air conditioner of first embodiment of the invention；

Fig. 2 is the schematic diagram according to the heating and air conditioner of second embodiment of the invention；

Fig. 3 is the schematic diagram according to the heating and air conditioner of third embodiment of the invention；

Fig. 4 is the schematic diagram according to the heating and air conditioner of four embodiment of the invention；

Fig. 5 is the schematic diagram according to the heating and air conditioner equipped with the second liquid storage device of the embodiment of the present invention；

Fig. 6 is the schematic diagram according to the heating and air conditioner for being equipped with solenoid valve and the second liquid storage device of the embodiment of the present invention；

Fig. 7 is the schematic diagram according to the duplex cylinder compressor of the embodiment of the present invention；

Fig. 8 is the flow chart of control method when being freezed according to the heating and air conditioner of the embodiment of the present invention；

Fig. 9 is the flow chart of control method when being heated according to the heating and air conditioner of the embodiment of the present invention.

Appended drawing reference:

Heating and air conditioner 100,

Duplex cylinder compressor 1, shell 10, the first cylinder 11, the second cylinder 12, the first liquid storage device 13, the second liquid storage device 14, row Port 15,

Commutate component 2, the first valve port D, the second valve port C, third valve port E, the 4th valve port S,

Outdoor heat exchanger 3, indoor heat exchanger 4,

Gas-liquid separator 5, gas vent m, first interface f, second interface g,

First throttle element 6, the second restricting element 7,

Control valve 8, refrigerant radiator 9,

Solenoid valve 20.

Specific embodiment

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to The embodiment of attached drawing description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.

In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected or can communicate each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly.For this field For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

Heating and air conditioner 100 according to an embodiment of the present invention is described in detail below with reference to Fig. 1-Fig. 7, wherein cold-warm type is empty Adjust device 100 that there is refrigeration mode and heating mode.

As shown in Fig. 1-Fig. 7, heating and air conditioner 100 according to an embodiment of the present invention, comprising: duplex cylinder compressor 1, commutation Component 2, outdoor heat exchanger 3 and indoor heat exchanger 4, gas-liquid separator 5, first throttle element 6, the second restricting element 7 and refrigerant Radiator 9.Wherein duplex cylinder compressor 1 includes shell 10, the first cylinder 11, the second cylinder 12 and the first liquid storage device 13, shell 10 It is equipped with exhaust outlet 15, the first cylinder 11 and the second cylinder 12 are respectively provided in shell 10, and the first liquid storage device 13 is located at shell 10 Outside, the air entry of the first cylinder 11 is connected to the first liquid storage device 13.That is, the first cylinder 11 and the second cylinder 12 carry out solely Vertical compression process, the compressed refrigerant being discharged from the first cylinder 11 and the compressed refrigerant difference being discharged from the second cylinder 12 It is drained into shell 10 and is then discharged from exhaust outlet 15.

The value range of the delivery space ratio of second cylinder 12 and the first cylinder 11 is 1%~10%.Further, The value range of the delivery space ratio of two cylinders 12 and the first cylinder 11 is 1%~9%, it is preferable that the second cylinder 12 and the The value range of the delivery space ratio of one cylinder 11 is 4%~9%.Such as second the exhaust of cylinder 12 and the first cylinder 11 hold Product ratio can be the parameters such as 4%, 5%, 8% or 8.5%.

The component 2 that commutates includes the first valve port D to the 4th valve port S, in the first valve port D and the second valve port C and third valve port E One of connection, the 4th valve port S are connected to another in the second valve port C and the third valve port E, the first valve port D and row Port 15 is connected, and the 4th valve port S is connected with the first liquid storage device 13.The first end of outdoor heat exchanger 3 is connected with the second valve port C, room The first end of interior heat exchanger 4 is connected with third valve port E.Specifically, when heating and air conditioner 100 is freezed, the first valve port D and the Two valve port C are connected to and third valve port E is connected to the 4th valve port S, when heating and air conditioner 100 heats, the first valve port D and third Valve port E is connected to and the second valve port C is connected to the 4th valve port S.Preferably, commutation component 2 is four-way valve.

Gas-liquid separator 5 includes gas vent m, first interface f and second interface g, gas vent m and the second cylinder 12 Air entry is connected, and first interface f is connected with the second end of outdoor heat exchanger 3, the second end of second interface g and indoor heat exchanger 4 It is connected, the adjustable first throttle element 6 of aperture, second interface g and interior is in series between first interface f and outdoor heat exchanger 3 Adjustable second restricting element 7 of aperture is in series between heat exchanger 4.Optionally, first throttle element 6 is electric expansion valve, the Two restricting elements 7 are electric expansion valve, it is of course possible to which understanding, first throttle element 6 and the second restricting element 7 can be with It is the adjustable element of other apertures such as heating power expansion valve.

For refrigerant radiator 9 for radiating to electric control element, refrigerant radiator 9 is connected on first throttle element and first Between interface f；Or refrigerant radiator 9 is connected between the second restricting element 7 and second interface g.It is understood that refrigerant As long as the structure of radiator 9 can be varied refrigerant that can circulate, such as refrigerant radiator 9 may include wriggling to prolong The metal tube stretched.

When heating and air conditioner 100 is freezed, the high temperature and pressure refrigerant being discharged from the exhaust outlet 15 of duplex cylinder compressor 1 passes through First valve port D and the second valve port C are drained into outdoor heat exchanger 3 and carry out condensation heat dissipation, and the liquid being discharged from outdoor heat exchanger 3 is cold Matchmaker is drained into gas-liquid separator 5 from first interface f after the level-one reducing pressure by regulating flow of first throttle element 6 and carries out gas-liquid point From the intermediate pressure gaseous coolant separated is drained into the second cylinder 12 from gas vent m to be compressed.

The intermediate pressure liquid refrigerant being discharged from the second interface g of gas-liquid separator 5 passes through the second level of the second restricting element 7 It is drained into indoor heat exchanger 4 and is exchanged heat to reduce indoor environment temperature after reducing pressure by regulating flow, is discharged from indoor heat exchanger 4 cold Matchmaker is drained into the first liquid storage device 13 by third valve port E and the 4th valve port S, and the refrigerant being discharged from the first liquid storage device 13 is drained into It is compressed in first cylinder 11.

When refrigeration, when refrigerant radiator 9 is connected between first throttle element 6 and first interface f, from first throttle member The refrigerant after a reducing pressure by regulating flow that part 6 is discharged is flowed into radiate with electric control element in refrigerant radiator 9, from cold The refrigerant that matchmaker's radiator 9 flows out is drained into gas-liquid separator 5, so as to reduce the temperature of electric control element.When refrigerant radiates When device 9 is connected between the second restricting element 7 and second interface g, the reducing pressure by regulating flow of process being discharged from gas-liquid separator 5 is simultaneously Liquid refrigerants by gas-liquid separation is entered to radiate with electric control element in refrigerant radiator 9, so as to reduce electricity Control the temperature of element.

When heating and air conditioner 100 heats, the high temperature and pressure refrigerant being discharged from the exhaust outlet 15 of duplex cylinder compressor 1 passes through First valve port D and third valve port E, which is drained into indoor heat exchanger 4, carries out condensation heat dissipation to increase indoor environment temperature, from interior The high-pressure liquid refrigerant that heat exchanger 4 is discharged is drained into gas from second interface g after the level-one reducing pressure by regulating flow of the second restricting element 7 Gas-liquid separation is carried out in liquid/gas separator 5, the intermediate pressure gaseous coolant separated is drained into the second cylinder 12 from gas vent m Inside compressed.

The intermediate pressure liquid refrigerant being discharged from the first interface f of gas-liquid separator 5 passes through the second level of first throttle element 6 Be drained into outdoor heat exchanger 3 and exchange heat after reducing pressure by regulating flow, the refrigerant being discharged from outdoor heat exchanger 3 by the second valve port C and 4th valve port S is drained into the first liquid storage device 13, and the refrigerant being discharged from the first liquid storage device 13, which is drained into the first cylinder 11, to carry out Compression.

When heating, when refrigerant radiator 9 is connected between first throttle element 6 and first interface f, from gas-liquid separator Reducing pressure by regulating flow of process and the liquid refrigerants Jing Guo gas-liquid separation for 5 discharges enter refrigerant radiator 9 it is interior with automatically controlled member Part radiates, so as to reduce the temperature of electric control element.When refrigerant radiator 9 is connected on the second restricting element 7 and second When between interface g, the refrigerant after a reducing pressure by regulating flow being discharged from the second restricting element 7 is flowed into refrigerant radiator 9 To radiate with electric control element, the refrigerant flowed out from refrigerant radiator 9 is drained into gas-liquid separator 5, so as to reduce The temperature of electric control element.

From this analysis, the refrigerant of different pressures state has respectively entered first when heating and air conditioner 100 is run In cylinder 11 and the second cylinder 12,12 complete independently compression process of the first cylinder 11 and the second cylinder is discharged from the first cylinder 11 Compressed refrigerant and being discharged to from the compressed refrigerant that the second cylinder 12 is discharged mixed in shell 10 after from 15 row of exhaust outlet Out, simultaneously because the value range of the delivery space ratio of the second cylinder 12 and the first cylinder 11 is 1%~10%, flow is less And the higher refrigerant of pressure state is drained into lesser second cylinder 12 of delivery space and is compressed, so as to improve energy Effect, energy-saving and emission-reduction.

Simultaneously by being equipped with gas-liquid separator 5 between outdoor heat exchanger 3 and indoor heat exchanger 4, thus gas-liquid separator 5 It is expelled back into the second cylinder 12 and compresses after a part of gaseous coolant is separated, be flowed into room when thus reducing refrigeration Gas content in the refrigerant of interior heat exchanger 4 and while reducing heating, are flowed into the gas content in the refrigerant of outdoor heat exchanger 3, Reduce influence of the gaseous coolant to the heat exchange property of indoor heat exchanger 4 or outdoor heat exchanger 3 as evaporator, so as to To improve heat exchange efficiency, compressor compresses power consumption is reduced.

Heating and air conditioner 100 according to an embodiment of the present invention can be mentioned effectively by the way that above-mentioned duplex cylinder compressor 1 is arranged High energy efficiency of air conditioner effectively facilitates energy-saving and emission-reduction, while by setting gas-liquid separator 5, heat exchange efficiency can be improved, reduce pressure Contracting machine compression power consumption further increases air conditioner ability and efficiency, and since refrigerant radiator 9 is arranged, can be to electric control element Carry out effective temperature-reducing.

As shown in fig. 6, in some embodiments of the invention, being gone here and there between gas vent m and the air entry of the second cylinder 12 It is associated with solenoid valve 20, it, can be with by closing solenoid valve 20 thus when the liquid coolant in gas-liquid separator 5 exceeds safety levels It avoids liquid refrigerants from entering in the second cylinder 12, so as to avoid duplex cylinder compressor 1 that liquid hammer occurs, extends duplex cylinder compressor 1 service life.It is possible to further which liquid level sensor is being arranged on gas-liquid separator 5, pass through the detection of liquid level sensor As a result the open and-shut mode of solenoid valve 20 is controlled.

In some embodiments of the invention, the value range of the volume of gas-liquid separator 5 is 100mL-500mL.

In some embodiments of the invention, as shown in Figure 5 and Figure 6, duplex cylinder compressor 1 further includes being located at outside shell 10 Second liquid storage device 14, the second liquid storage device 14 are connected between gas vent m and the air entry of the second cylinder 12.To pass through setting There is the second liquid storage device 14, further gas-liquid separation can be carried out to the refrigerant being discharged from the gas vent m of gas-liquid separator 5, it can It is returned in the second cylinder 12 with further avoiding liquid coolant, to avoid duplex cylinder compressor 1 that liquid hit phenomenon occurs, improves twin-tub The service life of compressor 1.

In further embodiment of the present invention, the volume of the first liquid storage device 13 is greater than the volume of the second liquid storage device 14.From And under the premise of guaranteeing the decrement of the second cylinder 12, by making the volume of the second liquid storage device 14 smaller, can reduce into This.Preferably, the volume of the second liquid storage device 14 is not more than the half of 13 volume of the first liquid storage device.

The environment temperature in outdoor unit in heating, due to 3 evaporation endothermic of outdoor heat exchanger, where electric control element It is lower, therefore as shown in Figure 3 and Figure 4, in some embodiments of the invention, heating and air conditioner 100 further includes control valve 8, Control valve 8 is connected in parallel with refrigerant radiator 9, and control valve 8 ends the circulation of refrigerant when refrigeration, and refrigerant flows through control valve when heating 8.Optionally, control valve 8 is in the check valve from one-way conduction on the second restricting element 7 to the direction of first throttle element 6.When So it is understood that control valve 8 can be with solenoid valve.

That is, when heating and air conditioner 100 is freezed, since control valve 8 ends the circulation of refrigerant, from first The refrigerant that restricting element 6 or gas-liquid separator 5 are discharged is flowed into refrigerant radiator 9 to exchange heat with electric control element, thus Realize the purpose for reducing the temperature of electric control element.When heating and air conditioner 100 heats, since control valve 8 is connected, from the Two restricting elements 7 most of refrigerant that perhaps gas-liquid separator 5 is discharged passes through the only sub-fraction of control valve 8 or not cold Matchmaker flows through refrigerant radiator 9, so that most of or even whole refrigerants flow to outdoor heat exchanger 3 in heating, changes in temperature can be improved The heating effect of type air conditioner 100.

Heating and air conditioner according to the above embodiment of the present invention (is set rated cooling capacity as 3.5kw, by by inventor The delivery space ratio of two cylinders and the first cylinder is set as efficiency and existing cold-warm type sky 7.6%) under different operating conditions It adjusts the efficiency of device to be at the same conditions compared, obtains following data:

Measurement condition	Prior art efficiency	Technical solution of the present invention efficiency	Promotion ratio
				Specified refrigeration	3.93	4.26	8.40%
Centre refrigeration	5.88	6.18	5.10%
				Specified heating	3.64	3.91	7.42%
Centre heating	5.55	5.89	6.13%
				Low-temperature heating	2.57	2.73	6.23%
APF	4.61	4.92	6.72%

It follows that heating and air conditioner according to an embodiment of the present invention is relative to existing cold-warm type compressor, each work Condition efficiency and whole year efficiency APF are obviously improved.

Inventor is by the cold-warm type air-conditioning of different rated cooling capacities and the embodiment of the present invention of different delivery spaces ratio simultaneously Device is compared with the heating and air conditioner under existing identical operating condition, and discovery efficiency has promotion, such as inventor by examination The heating and air conditioner for issuing after examination and approval the existing embodiment of the present invention (sets rated cooling capacity as 2.6kw, by the second cylinder and the first cylinder Delivery space ratio is set as 9.2%) compared with the heating and air conditioner under existing identical operating condition, and efficiency improves 7.3%.

The control method of heating and air conditioner according to an embodiment of the present invention is described in detail below with reference to Fig. 1-Fig. 9, wherein Heating and air conditioner is the heating and air conditioner according to the above embodiment of the present invention.When heating and air conditioner is run, first throttle Restricting element in element and the second restricting element positioned at upstream is level-one restricting element, first throttle element and the second throttling member Restricting element in part positioned at downstream is two-step throttle element, and in other words, in refrigeration, first throttle element is level-one throttling member Part, the second restricting element are two-step throttle element.In heating, the second restricting element is level-one restricting element, first throttle member Part is two-step throttle element.

Control method according to an embodiment of the present invention includes the following steps: first according to the detection knot to the first test object Fruit adjusts the aperture of level-one restricting element, then opening according to the testing result adjustment two-step throttle element to the second test object Degree, the setting aperture of level-one restricting element are less than the setting aperture of two-step throttle element, the testing result of the first test object and The testing result of second test object is different.It needs to be illustrated, the testing result of the first test object and the second detection The testing result difference of object refer to level-one restricting element and two-step throttle element cannot simultaneously using same state parameter into Row adjusts control, in other words, for adjusting the required relevant parameter of level-one restricting element and for adjusting two-step throttle element Required relevant parameter it is different.

Wherein the first test object includes the exhaust temperature of outdoor environment temperature, the running frequency of duplex cylinder compressor, exhaust outlet Degree, exhaust outlet pressure at expulsion, from gas vent be discharged refrigerant intermediate pressure, from gas vent be discharged refrigerant centre At least one of temperature.Second test object includes the row of outdoor environment temperature, the running frequency of duplex cylinder compressor, exhaust outlet Temperature degree, the pressure at expulsion of exhaust outlet, the intermediate pressure for the refrigerant being discharged from gas vent, the refrigerant that is discharged from gas vent At least one of medium temperature.

That is, as shown in Figure 8 and Figure 9, no matter freezing or heating, in heating and air conditioner operation, acquire Then parameter needed for processing control level-one restricting element and two-step throttle element is all first to adjust level-one according to obtained parameter The aperture of restricting element is until setting aperture, then adjusts the aperture of two-step throttle element until aperture is set, when level-one section again When fluid element and two-step throttle element are adjusted to setting aperture, the aperture of level-one restricting element is less than opening for two-step throttle element Degree.Of course, it should be understood that parameter needed for acquisition process control level-one restricting element and acquisition process control two-step throttle The step of parameter needed for element, can carry out simultaneously or successively carry out.

After the aperture of level-one restricting element and the aperture of two-step throttle element are all satisfied condition, can operation n seconds after, Again the first test object and the second test object are detected, then adjusts level-one restricting element and two-step throttle according to testing result The aperture of element so repeats.Certain repeat condition is without being limited thereto, such as can be after receiving the operational order of user, weight Then the first test object of new detection and the second test object adjust level-one restricting element and two-step throttle member according to testing result The aperture of part.In other words, in refrigeration or heating, condition is all satisfied in the aperture of level-one restricting element and two-step throttle element Afterwards, it can run n seconds or after receiving user operation signal, first throttle element and the second restricting element are being opened The relevant parameter of degree detects judgement again, then according to determining that result adjustment first throttle element and second restricting element open Degree so repeats.

The control method of several specific embodiments according to the present invention is described below.

Embodiment 1:

In this embodiment, the first test object and the second test object are outdoor environment temperature T4 and running frequency F, The setting of level-one restricting element and two-step throttle element is calculated according to the outdoor environment temperature T4 and running frequency F that detect Then aperture adjusts the aperture of corresponding level-one restricting element and two-step throttle element according to setting aperture.

It is understood that calculation formula is located in advance in the electric control element of heating and air conditioner, calculation formula can root It is specifically limited according to actual conditions.

Specifically, when refrigeration, the aperture LA_cool_1 and outdoor environment temperature T4 and running frequency F of first throttle element Between relational expression are as follows: LA_cool_1=a₁·F+b₁T₄+c₁, when the aperture LA_cool_1 of calculating is greater than the first segment of acquisition When the practical aperture of fluid element, the aperture of first throttle element is increased into calculating aperture；Otherwise it turns down.

Relational expression between the aperture LA_cool_2 and outdoor environment temperature T4 and running frequency F of second restricting element are as follows: LA_cool_2=a₂·F+b₂T₄+c₂, when the aperture LA_cool_2 of calculating is greater than the practical aperture of the second restricting element of acquisition When, the aperture of the second restricting element is increased into calculating aperture；Otherwise it turns down.Wherein, 0≤a₁≤ 20,0≤b₁≤ 20, -50≤ c₁≤100；0≤a₂≤ 30,0≤b₂≤ 30, -50≤c₂≤ 150 control coefrficient a, b, c can be 0, when any one is When number is zero, it was demonstrated that the corresponding parameter of the coefficient is on restricting element aperture without influence.

Pass when heating, between the aperture LA_heat_1 and outdoor environment temperature T4 and running frequency F of the second restricting element It is formula are as follows: LA_heat_1=x₁·F+y₁T₄+z₁, when the aperture LA_heat_1 of calculating is greater than the second restricting element of acquisition When practical aperture, the aperture of the second restricting element is increased into calculating aperture；Otherwise it turns down.

Relational expression between the aperture LA_heat_2 and outdoor environment temperature T4 and running frequency F of first throttle element are as follows: LA_heat_2=x₂·F+y₂T₄+z₂, when the aperture LA_heat_2 of calculating is greater than the practical aperture of the first throttle element of acquisition When, the aperture of first throttle element is increased into calculating aperture；Otherwise it turns down.Wherein, 0≤x₁≤ 15,0≤y₁≤ 15, -50≤ z₁≤100；0≤x₂≤ 25,0≤y₂≤ 25, -50≤z₂≤ 150 control coefrficient x, y, z can be 0, when any one is When number is zero, it was demonstrated that the corresponding parameter of the coefficient is on restricting element aperture without influence.

Such as in refrigeration, detects that outdoor environment temperature is 35 DEG C, compressor operating frequency 58Hz, set a₁=1, b₁=1.6, c₁=6；a₂=1.5, b₂=1.6, c₂=17.System calculates first according to collected frequency and T4 value first The aperture of restricting element should be 120, adjust the aperture of first throttle element to 120；Then the second restricting element is calculated Aperture is 160, adjusts the aperture of the second restricting element to 160.After the aperture 200s for maintaining two restricting elements, detection is pressed again Contracting machine running frequency and T4 value；Or the adjustment according to user to air-conditioning, compressor operating frequency and T4 value are detected, to first segment Fluid element and the second restricting element are readjusted.

According to this adjustment mode, equivalent specifications air conditioner, efficiency are high by 6.5% currently on the market for air conditioner Energy Efficiency Ratio.

In heating, detects that outdoor environment temperature is 7 DEG C, compressor operating frequency 72Hz, set x₁=2.0, y₁= 3.0,z₁=22.0；x₂=1, y₂=3.0, z₂=7.0.System calculates the second section according to collected frequency and T4 value first The aperture of fluid element should be 187, adjust the aperture of the second restricting element to 187；Then opening for first throttle element is calculated Degree is 100, adjusts the aperture of first throttle element to 100.After the aperture 200s for maintaining two restricting elements, detection compression again Machine running frequency and T4 value, or the adjustment according to user to air-conditioning detect compressor operating frequency and T4 value, to first throttle Element and the second restricting element are readjusted.

Embodiment 2:

In this embodiment, the first test object is outdoor environment temperature T4 and running frequency F, first according to outdoor environment The setting aperture of level-one restricting element is calculated in temperature T4 and running frequency F, then according to setting aperture adjustment level-one throttling The aperture of element；

Second test object is outdoor environment temperature T4, running frequency F and pressure at expulsion；Or second test object be room External environment temperature T4, running frequency F and delivery temperature, are calculated and set according to outdoor environment temperature T4 and running frequency F first Determine pressure at expulsion and perhaps sets delivery temperature then according to the actually detected pressure at expulsion arrived or delivery temperature adjustment second level section The aperture of fluid element is so that the pressure at expulsion or delivery temperature that detect reach setting pressure at expulsion or setting exhaust temperature Degree.

When the second test object includes delivery temperature, delivery temperature TP and outdoor environment temperature T4 and running frequency F it Between relational expression are as follows: TP_cool=a₂·F+b₂T₄+c₂, when the second test object includes pressure at expulsion, pressure at expulsion P row with Relational expression between outdoor environment temperature T4 and running frequency F are as follows: P row _ cool=a₃·F+b₃T₄+c₃, when collected exhaust When temperature or pressure at expulsion are greater than the setting delivery temperature calculated or setting pressure at expulsion, opening for big second restricting element is opened Degree；Otherwise it turns down.Wherein 0≤a₁≤ 20,0≤b₁≤ 20, -50≤c₁≤ 100,0≤a₂≤ 30,0≤b₂≤ 30, -50≤c₂≤ 150,0≤a₃≤ 30,0≤b₃≤ 30, -50≤c₃≤150.Control coefrficient a, b, c can be 0, when any one coefficient is When zero, it was demonstrated that the corresponding parameter of the coefficient is on restricting element aperture without influence.

Pass when heating, between the aperture LA_heat_1 and outdoor environment temperature T4 and running frequency F of the second restricting element It is formula are as follows: LA_heat_1=x₁·F+y₁T₄+z₁, when the aperture LA_heat_1 of calculating is greater than the second restricting element of acquisition When practical aperture, the aperture increase of the second restricting element is calculated into aperture；Otherwise it turns down.

When the second test object includes delivery temperature, delivery temperature TP and outdoor environment temperature T4 and running frequency F it Between relational expression are as follows: TP_heat=x₂·F+y₂T₄+z₂, when the second test object includes pressure at expulsion, pressure at expulsion P row with Relational expression between outdoor environment temperature T4 and running frequency F are as follows: P row _ heat=x₃·F+y₃T₄+z₃, when collected exhaust When temperature or pressure at expulsion are greater than the setting delivery temperature calculated or setting pressure at expulsion, opening for big first throttle element is opened Degree；Otherwise it turns down.Wherein 0≤x₁≤ 15,0≤y₁≤ 15, -50≤z₁≤ 100,0≤x₂≤ 25,0≤y₂≤ 25, -50≤z₂≤ 150,0≤x₃≤ 25,0≤y₃≤ 25, -50≤z₃≤150.Control coefrficient x, y, z can be 0, when any one coefficient is When zero, it was demonstrated that the corresponding parameter of the coefficient is on restricting element aperture without influence.

Such as in refrigeration, detects that outdoor environment temperature is 35 DEG C, compressor operating frequency 58Hz, set a₁=1, b₁=1.6, c₁=6；a₂=0.5, b₂=0.4, c₂=31；a₃=0.25, b₃=0.2, c₂=3.9.System first is according to collecting Frequency and T4 value, the aperture for calculating first throttle element for 120, should adjust the aperture of first throttle element to 120, so System is according to the frequency and T4 value used afterwards, calculate the corresponding delivery temperature TP_cool of the second restricting element be 74 DEG C or Person's pressure at expulsion P row _ cool is 2.54MPa, at this moment teases and ridicule whole second according to the delivery temperature TP or pressure at expulsion P that detect The aperture of restricting element, when the delivery temperature detected is greater than 74 DEG C (or the pressure at expulsion P row detected is greater than 2.54Mpa) When, gradually increase the aperture (movement of 4 steps can be adjusted by each) of the second restricting element.Maintain the aperture 200s of two restricting elements Afterwards, detect compressor operating frequency and T4 value, or the adjustment according to user to air-conditioning again, detection compressor operating frequency and T4 value readjusts first throttle element and the second restricting element.

When heating, when detecting that outdoor environment temperature is 7 DEG C, compressor operating frequency 72Hz sets x₁=2.0, y₁= 3.0,z₁=22.0；x₂=0.5, y₂=0.4, z₂=30；x₃=0.25, y₃=0.2, z₃=5.System is according to collected first Frequency and T4 value, the aperture for calculating the second restricting element should be 187, adjust the aperture of the second restricting element to 187, then System is according to the frequency and T4 value used, and calculating the corresponding delivery temperature TP_heat of first throttle element is 68.8 DEG C, row Atmospheric pressure P row _ heat is 2.44MPa.At this moment according to delivery temperature TP or pressure at expulsion P the adjustment first throttle member detected The aperture of part, when the delivery temperature detected is greater than 68.8 DEG C (or the pressure at expulsion P row detected is greater than 2.44Mpa), The aperture (movement of 4 steps can be adjusted by each) of first throttle element is gradually increased, otherwise is gradually reduced opening for first throttle element Degree.After the aperture 200s for maintaining two restricting elements, compressor operating frequency and T4 value are detected again, or according to user to sky The adjustment of tune detects compressor operating frequency and T4 value, readjusts to first throttle element and the second restricting element.

Embodiment 3:

In this embodiment, multiple outdoor temperature sections are preset, each outdoor temperature section corresponds to different restricting elements Aperture, the first test object be outdoor environment temperature T4, the outdoor where the actually detected outdoor environment temperature T4 arrived The aperture of the corresponding opening value adjustment level-one restricting element of temperature range；

Second test object is outdoor environment temperature T4, running frequency F and pressure at expulsion；Or second test object be room External environment temperature T4, running frequency F and delivery temperature, are calculated and set according to outdoor environment temperature T4 and running frequency F first Determine pressure at expulsion and perhaps set delivery temperature and adjust two-step throttle to pressure at expulsion or delivery temperature according to actually detected The aperture of element is so that detect that pressure at expulsion or delivery temperature reach setting pressure at expulsion or setting delivery temperature.

Specifically, when refrigeration, the concrete condition of the aperture of the corresponding first throttle element in different outdoor temperature sections is such as Following table:

T4	Aperture
		10≤T4 < 20	100
20≤T4 < 30	110
		30≤T4 < 40	120
40≤T4 < 50	150
		50≤T4 < 60	180

When the second test object includes delivery temperature, delivery temperature TP and outdoor environment temperature T4 and running frequency F it Between relational expression are as follows: TP_cool=a₁·F+b₁T₄+c₁, when the second test object includes pressure at expulsion, pressure at expulsion P row with Relational expression between outdoor environment temperature T4 and running frequency F are as follows: P row _ cool=a₂·F+b₂T₄+c₂, when collected exhaust When temperature or pressure at expulsion are greater than the setting delivery temperature calculated or setting pressure at expulsion, opening for big second restricting element is opened Degree；Otherwise it turns down.Wherein 0≤a₁≤ 20,0≤b₁≤ 20, -50≤c₁≤ 100,0≤a₂≤ 30,0≤b₂≤ 30, -50≤c₂≤ 150.Control coefrficient a, b, c can be 0, when any one coefficient is zero, it was demonstrated that the corresponding parameter of the coefficient is to throttling Element aperture is without influence.

When heating, the concrete condition of the aperture of corresponding second restricting element in different outdoor temperature sections is as follows:

T4	Aperture
		10≤T4 < 20	160
5≤T4 < 10	180
		- 5≤T4 < 5	200
- 10≤T4 < -5	250
		- 15≤T4 < -10	300

When the second test object includes delivery temperature, delivery temperature TP and outdoor environment temperature T4 and running frequency F it Between relational expression are as follows: TP_heat=x₁·F+y₁T₄+z₁, when the second test object includes pressure at expulsion, pressure at expulsion P row with Relational expression between outdoor environment temperature T4 and running frequency F are as follows: P row _ heat=x₂·F+y₂T₄+z₂, when collected exhaust When temperature or pressure at expulsion are greater than the setting delivery temperature calculated or setting pressure at expulsion, opening for big first throttle element is opened Degree；Otherwise it turns down.Wherein 0≤x₁≤ 25,0≤y₁≤ 25, -50≤z₁≤ 150,0≤x₂≤ 25,0≤y₂≤ 25, -50≤z₂≤ 150.Control coefrficient x, y, z can be 0, when any one coefficient is zero, it was demonstrated that the corresponding parameter of the coefficient is to throttling Element aperture is without influence.

For example, detection outdoor environment temperature is 35 DEG C, compressor operating frequency 58Hz when refrigeration, a is set₁=0.5, b₁ =0.4, c₁=31；a₂=0.25, b₂=0.2, c₂=3.9.System first obtains according to outdoor environment temperature T4 is collected The aperture of one restricting element should be 120, adjust the aperture of first throttle element to 120；Then system is according to frequency and T4 value, Calculate that the corresponding delivery temperature TP_cool of the second restricting element is 74 DEG C or pressure at expulsion P row _ cool is 2.54MPa, this When the aperture of the second restricting element is adjusted according to the delivery temperature TP or pressure at expulsion P that detect, such as the row detected When temperature degree is greater than 74 DEG C (or the pressure at expulsion P row detected is greater than 2.54Mpa), opening for the second restricting element is gradually increased Degree (can adjust the movement of 4 steps by each).After the aperture 200s for maintaining two restricting elements, again detect compressor operating frequency and T4 value, or the adjustment according to user to air-conditioning detect compressor operating frequency and T4 value, to first throttle element and the second section Fluid element is readjusted.

When heating, detects that outdoor environment temperature is 7 DEG C, compressor operating frequency 72Hz, set x₁=0.5, y₁= 0.4,z₁=30；x₂=0.25, y₂=2, z₂=5.System obtains the second section according to collected outdoor environment temperature T4 first The aperture of fluid element should be 180, adjust the aperture of the second restricting element to 180；Then system according to the frequency that uses and T4 value, calculating the corresponding delivery temperature TP_heat of first throttle element is 68.8 DEG C, and pressure at expulsion P row _ heat is 3.7MPa.At this moment according to the aperture of the delivery temperature TP that detects or pressure at expulsion P adjustment first throttle element, when detecting Delivery temperature be greater than 68.8 DEG C (or detect pressure at expulsion P row be greater than 3.7Mpa) when, gradually increase first throttle member The aperture (movement of 4 steps can be adjusted by each) of part, on the contrary it is gradually reduced the aperture of first throttle element.Maintain two restricting elements Aperture 200s after, detect compressor operating frequency and T4 value, or the adjustment according to user to air-conditioning again, detect compressor Running frequency and T4 value, readjust first throttle element and the second restricting element.

Embodiment 4:

In this embodiment, presetting medium temperature, perhaps the first test object of intermediate pressure is intermediate pressure or centre Temperature, according to it is actually detected to intermediate pressure or medium temperature adjustment level-one restricting element aperture so that detecting Intermediate pressure or medium temperature reach default intermediate pressure or default medium temperature.

Second test object is outdoor environment temperature T4, running frequency F and pressure at expulsion；Or second test object be room External environment temperature T4, running frequency F and delivery temperature, are calculated and set according to outdoor environment temperature T4 and running frequency F first Determine pressure at expulsion and perhaps set delivery temperature and adjust two-step throttle to pressure at expulsion or delivery temperature according to actually detected The aperture of element is so that the pressure at expulsion or delivery temperature that detect reach setting pressure at expulsion or setting delivery temperature.

Specifically, when refrigeration, the value interval of preset medium temperature can be 20 DEG C -35 DEG C, preset intermediate pressure Value interval can be 0.8MPa-2.0MPa.When detecting intermediate pressure or medium temperature lower than setting value, open big by the The aperture of one restricting element, on the contrary it turns down.

When heating, the value interval of preset medium temperature can be 20 DEG C -30 DEG C, the value area of preset intermediate pressure Between can be 1.0MPa-2.5MPa.When detecting that intermediate pressure or medium temperature are higher than setting value, big second throttling member is opened The aperture of part, on the contrary it turns down.

Such as when refrigeration, medium temperature is set as 26 DEG C or sets intermediate pressure 1.65MPa, detects outdoor environment temperature Degree is 35 DEG C, compressor operating frequency 58Hz, sets a₁=0.5, b₁=0.4, c₁=31；a₂=0.25, b₂=0.2, c₂= 3.9.Firstly, system is according to collected medium temperature or the aperture of intermediate pressure value adjustment first throttle element.Work as acquisition The medium temperature arrived gradually turns down first throttle element greater than 26 DEG C or when collected intermediate pressure is greater than 1.65MPa Aperture (can adjust the movement of 4 steps by each).Otherwise turn aperture down.Then system calculates the second throttling according to frequency and T4 value The corresponding delivery temperature TP_cool of element is 74 DEG C or pressure at expulsion P row _ cool is 2.54MPa, and at this moment basis detects Delivery temperature TP perhaps pressure at expulsion P adjust the second restricting element aperture when detect delivery temperature be greater than 74 DEG C (or inspection The pressure P row measured is greater than 2.54Mpa) when, gradually increase the aperture (movement of 4 steps can be adjusted by each) of the second restricting element. After the aperture 200s for maintaining two restricting elements, compressor operating frequency and T4 value are detected again, or according to user to air-conditioning Adjustment, detect compressor operating frequency and T4 value, first throttle element and the second restricting element readjusted.

When heating, medium temperature is set as 26 DEG C, intermediate pressure 1.6MPa, detects that outdoor environment temperature is 7 DEG C, compression Machine running frequency is 72Hz, sets x₁=0.5, y₁=0.4, z₁=30；x₂=0.25, y₂=2, z₂=5.System first is according to adopting The medium temperature or intermediate pressure value collected adjusts the aperture of the second restricting element.When collected medium temperature is greater than 26 DEG C Or collected intermediate pressure is when being greater than 1.6MPa, gradually increase the second restricting element aperture (can by each to adjust 4 steps dynamic Make).Otherwise turn aperture down.Then system calculates the corresponding exhaust of first throttle element according to the frequency and T4 value that detect Temperature TP_heat is 68.8 DEG C, and pressure at expulsion P row _ heat is 3.7MPa.At this moment according to the delivery temperature TP or row detected Atmospheric pressure P adjusts the aperture of first throttle element, when the delivery temperature detected is greater than 68.8 DEG C of (or exhaust pressures detected Power P row is greater than 3.7Mpa) when, the aperture (movement of 4 steps can be adjusted by each) of first throttle element is gradually increased, otherwise is gradually subtracted The aperture of small first throttle element.After the aperture 200s for maintaining two restricting elements, compressor operating frequency and T4 are detected again Value, or the adjustment according to user to air-conditioning detect compressor operating frequency and T4 value, throttle to first throttle element and second Element is readjusted.

Embodiment 5:

In this embodiment, presetting medium temperature, perhaps the first test object of intermediate pressure is intermediate pressure or centre Temperature, according to it is actually detected to intermediate pressure or medium temperature adjustment level-one restricting element aperture so that detecting Intermediate pressure or medium temperature reach default intermediate pressure or default medium temperature；

Second test object is outdoor environment temperature T4 and running frequency F, first according to outdoor environment temperature T4 and operation The setting aperture of two-step throttle element is calculated in frequency F, then according to the aperture of setting aperture adjustment two-step throttle element.

Specifically, the value interval of preset medium temperature can be 20 DEG C -35 DEG C when refrigeration, preset intermediate pressure Value interval can be 0.8MPa-1.5MPa.When detecting intermediate pressure or temperature lower than setting value, big first throttle is opened The aperture of element, on the contrary it turns down.

Relational expression between the aperture LA_cool_2 and outdoor environment temperature T4 and running frequency F of second restricting element are as follows: LA_cool_2=a₂·F+b₂T₄+c₂, when the aperture LA_cool_2 of calculating is greater than the practical aperture of the second restricting element of acquisition When, the aperture of the second restricting element is increased into calculating aperture；Otherwise it turns down.Wherein, 0≤a₂≤ 30,0≤b₂≤ 30, -50≤ c₂≤ 150, control coefrficient a, b, c can be 0, when any one coefficient is zero, it was demonstrated that the corresponding parameter pair of the coefficient Restricting element aperture is without influence.

When heating, the value interval of preset medium temperature can be 20 DEG C -30 DEG C, the value area of preset intermediate pressure Between can be 1.0MPa-2.5MPa.When detecting that intermediate pressure or temperature are higher than setting value, big second restricting element is opened Aperture, on the contrary it turns down.

Relational expression between the aperture LA_heat_2 and outdoor environment temperature T4 and running frequency F of first throttle element are as follows: LA_heat_2=x₂·F+y₂T₄+z₂, when the aperture LA_heat_2 of calculating is greater than the practical aperture of the first throttle element of acquisition When, the aperture of first throttle element is increased into calculating aperture；Otherwise it turns down.Wherein, 0≤x₂≤ 25,0≤y₂≤ 25, -50 ≤z₂≤ 150, control coefrficient x, y, z can be 0, when any one coefficient is zero, it was demonstrated that the corresponding parameter of the coefficient On restricting element aperture without influence.

Such as when refrigeration, medium temperature is set as 26 DEG C or sets intermediate pressure 1.65MPa, detects outdoor environment temperature Degree is 35 DEG C, compressor operating frequency 58Hz, sets a₂=1.5, b₂=1.6, c₂=17.Firstly, system is according to collected The aperture of medium temperature or intermediate pressure value adjustment first throttle element.When collected medium temperature is greater than 26 DEG C or adopts When the intermediate pressure collected is greater than 1.65MPa, the aperture (movement of 4 steps can be adjusted by each) of first throttle element is gradually turned down. Otherwise turn aperture down.Then system is according to detecting that outdoor environment temperature and compressor operating frequency calculate the second restricting element Set aperture as 160, then adjust the aperture of the second restricting element to 160.After the aperture 200s for maintaining two restricting elements, Again compressor operating frequency and T4 value, or the adjustment according to user to air-conditioning are detected, compressor operating frequency and T4 are detected Value, readjusts first throttle element and the second restricting element.

When heating, medium temperature is set as 26 DEG C, intermediate pressure 1.6MPa, detects that outdoor environment temperature is 7 DEG C, compression Machine running frequency is 72Hz, sets x₂=1, y₂=3.0, z₂=7.0.First system according to collected medium temperature or in Between pressure value adjust the second restricting element aperture.When the intermediate pressure that the medium temperature detected is greater than 26 DEG C or detects When greater than 1.6MPa, the aperture (movement of 4 steps can be adjusted by each) of the second restricting element is gradually increased.Otherwise turn aperture down.So The aperture that first throttle element is calculated afterwards is 100, adjusts the aperture of first throttle element to 100.Maintain two throttling members After the aperture 200s of part, compressor operating frequency and T4 value, or the adjustment according to user to air-conditioning, detection compression are detected again Machine running frequency and T4 value, readjust first throttle element and the second restricting element.

Embodiment 6:

In this embodiment, multiple outdoor temperature sections are preset, each outdoor temperature section corresponds to different restricting elements Aperture, the first test object be outdoor environment temperature T4, the outdoor where the actually detected outdoor environment temperature T4 arrived The aperture of the corresponding opening value adjustment level-one restricting element of temperature range.

Relational expression between the aperture LA_heat_2 and outdoor environment temperature T4 and running frequency F of first throttle element are as follows: LA_heat_2=x₂·F+y₂T₄+z₂, when the aperture LA_heat_2 of calculating is greater than the practical aperture of the first throttle element of acquisition When, the aperture of first throttle element is increased into calculating aperture；Otherwise it turns down.Wherein, 0≤x₂≤ 25,0≤y₂≤ 25, -50≤ z₂≤ 150, control coefrficient x, y, z can be 0, when any one coefficient is zero, it was demonstrated that the corresponding parameter pair of the coefficient Restricting element aperture is without influence.

For example, detecting that outdoor environment temperature is 35 DEG C, compressor operating frequency 58Hz when refrigeration, setting a₂= 1.5,b₂=1.6, c₂=17.Firstly, system obtains opening for first throttle element according to outdoor environment temperature T4 is collected first Degree should be 120, adjust the aperture of first throttle element to 120.Then system is according to detecting outdoor environment temperature and compression What machine running frequency calculated the second restricting element sets aperture as 160, then adjusts the aperture of the second restricting element to 160. After the aperture 200s for maintaining two restricting elements, compressor operating frequency and T4 value are detected again, or according to user to air-conditioning Adjustment, detect compressor operating frequency and T4 value, first throttle element and the second restricting element readjusted.

When heating, detects that outdoor environment temperature is 7 DEG C, compressor operating frequency 72Hz, set x₂=1, y₂=3.0, z₂=7.0.System first show that the aperture of the second restricting element should be 180, adjusts according to collected outdoor environment temperature T4 The aperture of whole second restricting element is to 180；Then the aperture that first throttle element is calculated is 100, adjustment first throttle member The aperture of part is to 100.After the aperture 200s for maintaining two restricting elements, compressor operating frequency and T4 value are detected again, or Adjustment according to user to air-conditioning detects compressor operating frequency and T4 value, to first throttle element and the second restricting element into Row is readjusted.

It is understood that the specific example explanation that above-mentioned six embodiments are merely given as, the control of the embodiment of the present invention Method is not limited to above-mentioned six kinds, such as can be by the tune of the aperture of level-one restricting element and two-step throttle element in six kinds of examples Section mode carries out random combine；Or the compressor operating frequency in above-described embodiment can also by it is actually detected to outdoor ring Border temperature obtains, such as presets multiple outdoor environment temperature sections, and multiple outdoor environment temperature sections correspond to different compressors Running frequency.

In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below " One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.

Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims

1. a kind of control method of heating and air conditioner, which is characterized in that

Heating and air conditioner, comprising: duplex cylinder compressor, the duplex cylinder compressor include shell, the first cylinder, the second cylinder and One liquid storage device, the shell are equipped with exhaust outlet, and first cylinder and second cylinder are respectively provided in the shell, institute The first liquid storage device to be stated to be located at outside the shell, the air entry of first cylinder is connected to first liquid storage device, and described second The value range of the delivery space ratio of cylinder and first cylinder is 1%~9%；Commutate component, the commutation component packet Including the first valve port to the 4th valve port, first valve port is connected to one of in the second valve port and third valve port, and described Four valve ports are connected to another in second valve port and the third valve port, first valve port and the exhaust outlet phase Even, the 4th valve port is connected with first liquid storage device；Outdoor heat exchanger and indoor heat exchanger, the of the outdoor heat exchanger One end is connected with second valve port, and the first end of the indoor heat exchanger is connected with the third valve port；Gas-liquid separator, institute Stating gas-liquid separator includes gas vent, first interface and second interface, the air-breathing of the gas vent and second cylinder Mouth is connected, and the first interface is connected with the second end of the outdoor heat exchanger, the second interface and the indoor heat exchanger Second end be connected, the adjustable first throttle element of aperture, institute are in series between the first interface and the outdoor heat exchanger It states and is in series with adjustable second restricting element of aperture between second interface and the indoor heat exchanger；For being carried out to electric control element The refrigerant radiator of heat dissipation, the refrigerant radiator tandem is between the first throttle element and the first interface；Or The refrigerant radiator tandem is between second restricting element and the second interface；

When heating and air conditioner is run, the restricting element of upstream is located in the first throttle element and second restricting element For level-one restricting element, the restricting element in the first throttle element and second restricting element positioned at downstream is second level section Fluid element；

The control method includes the following steps: that adjusting the level-one according to the testing result to the first test object first throttles The aperture of element is to aperture is set, and then basis adjusts opening for the two-step throttle element to the testing result of the second test object Degree to setting aperture, the setting aperture of the level-one restricting element less than the two-step throttle element setting aperture, described the The testing result of one test object is different from the testing result of second test object；

Wherein first test object includes the exhaust temperature of outdoor environment temperature, the running frequency of duplex cylinder compressor, exhaust outlet Degree, exhaust outlet pressure at expulsion, from the gas vent be discharged refrigerant intermediate pressure, from the gas vent be discharged it is cold At least one of medium temperature of matchmaker；

Second test object includes outdoor environment temperature, the running frequency of duplex cylinder compressor, the delivery temperature of exhaust outlet, row The pressure at expulsion of port, the intermediate pressure for the refrigerant being discharged from the gas vent, the refrigerant that is discharged from the gas vent At least one of medium temperature.

2. the control method of heating and air conditioner according to claim 1, which is characterized in that first test object is Outdoor environment temperature T4 and running frequency F is calculated one according to the outdoor environment temperature T4 and the running frequency F first Then the setting aperture of grade restricting element adjusts the aperture of the level-one restricting element according to setting aperture；

Second test object is outdoor environment temperature T4, running frequency F and pressure at expulsion；Or second test object For outdoor environment temperature T4, running frequency F and delivery temperature, first according to the outdoor environment temperature T4 and the running frequency F is calculated setting pressure at expulsion and perhaps sets delivery temperature then according to the actually detected pressure at expulsion arrived or exhaust temperature Degree adjustment two-step throttle element aperture so that the pressure at expulsion or delivery temperature that detect reach setting pressure at expulsion or Set delivery temperature.

3. the control method of heating and air conditioner according to claim 1, which is characterized in that preset multiple outdoor temperature areas Between, each outdoor temperature section corresponds to the aperture of different restricting elements,

First test object is outdoor environment temperature T4, the outdoor temperature where the actually detected outdoor environment temperature T4 arrived The aperture of the corresponding opening value adjustment level-one restricting element in section；

4. the control method of heating and air conditioner according to claim 1, which is characterized in that default medium temperature is pre- If intermediate pressure, first test object is intermediate pressure or medium temperature, according to the actually detected intermediate pressure arrived or The aperture of person's medium temperature adjustment level-one restricting element so that the intermediate pressure or medium temperature that detect reach default in Between pressure or default medium temperature；

5. the control method of heating and air conditioner according to claim 1, which is characterized in that default medium temperature is pre- If intermediate pressure, first test object is intermediate pressure or medium temperature, according to the actually detected intermediate pressure arrived or The aperture of person's medium temperature adjustment level-one restricting element so that the intermediate pressure or medium temperature that detect reach default in Between pressure or default medium temperature；

Second test object is outdoor environment temperature T4 and running frequency F, first according to the outdoor environment temperature T4 and The setting aperture of two-step throttle element is calculated in the running frequency F, then adjusts the two-step throttle according to setting aperture The aperture of element.

6. the control method of heating and air conditioner according to claim 1, which is characterized in that preset multiple outdoor temperature areas Between, each outdoor temperature section corresponds to the aperture of different restricting elements,

7. the control method of heating and air conditioner according to claim 1, which is characterized in that the first throttle element is Electric expansion valve, second restricting element are electric expansion valve.

8. the control method of heating and air conditioner according to claim 1, which is characterized in that the gas vent and described Solenoid valve is in series between the air entry of second cylinder.

9. the control method of heating and air conditioner according to claim 1, which is characterized in that the appearance of the gas-liquid separator Long-pending value range is 100mL-500mL.

10. the control method of heating and air conditioner according to claim 1, which is characterized in that further include and the refrigerant The control valve that radiator is connected in parallel, when refrigeration the control valve cut-off refrigerant circulation, refrigerant flows through the control when heating Valve.

11. the control method of heating and air conditioner according to claim 10, which is characterized in that the control valve be from The check valve of one-way conduction on second restricting element to the direction of the first throttle element.

12. the control method of heating and air conditioner described in any one of -11 according to claim 1, which is characterized in that described double Cylinder compressor further includes the second liquid storage device being located at outside the shell, and second liquid storage device is connected on the gas vent and institute Between the air entry for stating the second cylinder.

13. the control method of heating and air conditioner according to claim 12, which is characterized in that first liquid storage device Volume is greater than the volume of second liquid storage device.