CN105910229B - A kind of air-conditioner set throttling control method and air-conditioner set - Google Patents

A kind of air-conditioner set throttling control method and air-conditioner set Download PDF

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Publication number
CN105910229B
CN105910229B CN201610275960.8A CN201610275960A CN105910229B CN 105910229 B CN105910229 B CN 105910229B CN 201610275960 A CN201610275960 A CN 201610275960A CN 105910229 B CN105910229 B CN 105910229B
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China
Prior art keywords
value
throttling
setting value
expansion valve
electric expansion
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CN105910229A (en
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张捷
安普光
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Qingdao Haier Air Conditioning Electric Co Ltd
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Qingdao Haier Air Conditioning Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

The invention discloses a kind of air-conditioner set throttling control method and air-conditioner set, air-conditioner set includes compressor, condenser, evaporator, throttling execution unit and throttling control unit；Throttling execution unit is connected in the connecting line of condenser and evaporator；Throttling execution unit includes first throttle pipeline in parallel, the second throttling pipeline, third throttling pipeline, is provided with electric expansion valve on first throttle pipeline, is provided with solenoid valve on the second throttle pipe road, abacus is arranged on third throttle pipe road.Method includes: to obtain actually detected value;More actually detected value and high setting value, the size of low setting value, control electric expansion valve and solenoid valve according to comparison result.The present invention passes through orifice plate, electric expansion valve, solenoid valve is in parallel, and aperture control is carried out to electric expansion valve and switch control is carried out to solenoid valve, it increases flow and adjusts control range, improve flow regulating power, improve the stability and safety of unit operation.

Description

A kind of air-conditioner set throttling control method and air-conditioner set
Technical field
The invention belongs to air-conditioning technical fields, specifically, being to be related to the throttling of a kind of air-conditioner set and the air-conditioner set Control method.
Background technique
For large-scale heat pump unit, because it includes two kinds of operating conditions of refrigeration and heating, cold medium flux is poor when two kinds of operating conditions are run It is different larger, the orifice size of the orifice throttle generallyd use be it is immutable, cause the flow regulating power of unit poor.
Summary of the invention
The present invention provides a kind of air-conditioner set throttling control method and air-conditioner sets, solve flow regulating power difference Problem.
It is achieved in order to solve the above technical problems, the present invention adopts the following technical solutions:
A kind of air-conditioner set throttles control method, and the air-conditioner set includes that compressor, condenser, evaporator, throttling are held Row component and throttling control unit；The throttling execution unit is connected in the connecting line of condenser and evaporator；The section Stream execution unit includes first throttle pipeline in parallel, the second throttling pipeline, third throttling pipeline, in the first throttle pipeline On be provided with electric expansion valve, be provided with solenoid valve on second throttle pipe road, be arranged on third throttle pipe road Abacus；
The throttling control method includes:
(1) the throttling control unit obtains actually detected value;
The actually detected value is one of suction superheat angle value, discharge superheat angle value, level value；
(2) the throttling control unit actually detected value and high setting value, the size of low setting value, and according to Comparison result controls the aperture of electric expansion valve and the switch of solenoid valve；
(21) when the actually detected value is one of suction superheat angle value, discharge superheat angle value, level value, and institute When stating the level value before level value flows through throttling execution unit for the refrigerant in condenser and evaporator joint pipe road:
If low setting value≤actually detected value≤high setting value, controls electric expansion valve and solenoid valve keeps current shape State；
If actually detected value is greater than high setting value, judge whether the aperture of electric expansion valve is maximum opening value, if It is no, then increase electronic expansion valve opening；If so, opening solenoid valve；
If actually detected value is less than low setting value, judge whether the aperture of electric expansion valve is minimum opening value, if It is no, then reduce electronic expansion valve opening；If so, closing solenoid valve；
(22) when the actually detected value is level value, and the level value is in condenser and evaporator joint pipe road When refrigerant flows through the level value after throttling execution unit:
If low setting value≤actually detected value≤high setting value, controls electric expansion valve and solenoid valve keeps current shape State；
If actually detected value is less than low setting value, judge whether the aperture of electric expansion valve is maximum opening value, if It is no, then increase electronic expansion valve opening；If so, opening solenoid valve；
If actually detected value is greater than high setting value, judge whether the aperture of electric expansion valve is minimum opening value, if It is no, then reduce electronic expansion valve opening；If so, closing solenoid valve；
The high setting value is the high setting value of corresponding suction superheat, the high setting value of discharge superheat, the setting of liquid level height Value；The low setting value is the low setting value of corresponding suction superheat, the low setting value of discharge superheat, the low setting value of liquid level.
Further, before the step (1), the method also includes:
Whether the throttling control unit detection unit load is more than or equal to assumed load；
If so, entering throttling control, the step (1) is executed.
Further, the assumed load is 40%~60%.
Further, the maximum opening value is 70%~90%, and the minimum opening value is 20%~40%.
Further, the high setting value of the suction superheat is 2 DEG C, and the low setting value of the suction superheat is 0 DEG C.
Preferably, the high setting value of the discharge superheat is 2 DEG C, and the low setting value of the discharge superheat is 0 DEG C.
A kind of air-conditioner set, including compressor, condenser, evaporator, throttling execution unit and throttling control unit；It is described Throttling execution unit is connected in the connecting line of condenser and evaporator；The throttling execution unit includes first segment in parallel Flow tube road, the second throttling pipeline, third throttling pipeline, are provided with electric expansion valve on the first throttle pipeline, described Second throttle pipe road is provided with solenoid valve, and abacus is arranged on third throttle pipe road；
The throttling control unit is for obtaining actually detected value;The actually detected value is suction superheat angle value, exhaust One of super heat value, level value；
The throttling control unit is used for the actually detected value and high setting value, the size of low setting value, and root According to the aperture of comparison result control electric expansion valve and the switch of solenoid valve；
When the actually detected value is one of suction superheat angle value, discharge superheat angle value, level value, and the liquid When place value is the level value before the refrigerant in condenser and evaporator joint pipe road flows through throttling execution unit:
The throttling control unit is for controlling electric expansion valve in low setting value≤actually detected value≤high setting value Current state is kept with solenoid valve；
The throttling control unit is used to judge when actually detected value is greater than high setting value that the aperture of electric expansion valve to be No is maximum opening value, if it is not, then the throttling control unit control electric expansion valve increases aperture；If so, the throttling Control unit controls solenoid valve and opens；
The throttling control unit is used to judge when actually detected value is less than low setting value that the aperture of electric expansion valve to be No is minimum opening value, if it is not, then the throttling control unit control electric expansion valve reduces aperture；If so, the throttling Control unit controls solenoid valve and closes；
When the actually detected value is level value, and the level value is the refrigerant in condenser and evaporator joint pipe road When flowing through the level value after throttling execution unit:
The throttling control unit is for controlling electric expansion valve in low setting value≤actually detected value≤high setting value Current state is kept with solenoid valve；
The throttling control unit is used to judge when actually detected value is less than low setting value that the aperture of electric expansion valve to be No is maximum opening value, if it is not, then the throttling control unit control electric expansion valve increases aperture；If so, the throttling Control unit controls solenoid valve and opens；
The throttling control unit is used to judge when actually detected value is greater than high setting value that the aperture of electric expansion valve to be No is minimum opening value, if it is not, then the throttling control unit control electric expansion valve reduces aperture；If so, the throttling Control unit controls solenoid valve and closes；
The high setting value is the high setting value of corresponding suction superheat, the high setting value of discharge superheat, the setting of liquid level height Value；The low setting value is the low setting value of corresponding suction superheat, the low setting value of discharge superheat, the low setting value of liquid level.
Further, the throttling control unit is also used to detect unit load and whether is more than or equal to assumed load, and When more than or equal to assumed load, controlled into throttling.
Compared with prior art, the control method the advantages and positive effects of the present invention are: air-conditioner set of the invention throttles And air-conditioner set, aperture control and right is carried out by the way that orifice plate, electric expansion valve, solenoid valve is in parallel, and to electric expansion valve Solenoid valve carries out switch control, increases flow and adjusts control range, improves flow regulating power, and meeting flow adjusting needs It asks；When cold medium flux in condenser and evaporator joint pipe road is excessive/too small, the aperture control to electric expansion valve is first passed through System realizes the slow adjusting of cold medium flux, and cold medium flux is avoided to change greatly；Have reached the maximum in the aperture of electric expansion valve/ Minimum opening value, but when cold medium flux is still excessive/too small, then switch control is carried out to solenoid valve, it realizes to cold medium flux Adjusting so that cold medium flux returns in normal range (NR)；By first using electronic expansion valve regulation cold medium flux, then pass through electromagnetism The method of valve regulation cold medium flux avoids cold medium flux variation is very fast, and raising unit is run stability and safety.
After a specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear Chu.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of air-conditioner set proposed by the invention；
Fig. 2 is the flow chart of one embodiment of air-conditioner set throttling control method proposed by the invention；
Fig. 3 is the flow chart of another embodiment of air-conditioner set throttling control method proposed by the invention；
Fig. 4 is the flow chart of the further embodiment of air-conditioner set throttling control method proposed by the invention.
Appended drawing reference:
1, compressor；2, condenser；3, evaporator；4, electric expansion valve；5, solenoid valve；6, orifice plate.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to drawings and examples, Invention is further described in detail.
The present embodiment proposes a kind of air-conditioner set throttling control method and air-conditioner set, and flow regulating power is strong, can expire The throttling demand of unit and big load unit that sufficient operating condition differs greatly improves the stability and safety of air-conditioner set operation Property.The throttling control method of air-conditioner set and the air-conditioner set is illustrated below.
Air-conditioner set mainly includes compressor 1, condenser 2, evaporator 3, throttle execution unit and throttling control unit etc., Shown in Figure 1, by piping connection, throttling execution unit is connected on condenser 2 and steams for compressor 1, condenser 2, evaporator 3 In the connecting line for sending out device 3；Throttling execution unit includes first throttle pipeline in parallel, the second throttling pipeline, third throttle pipe Road is provided with electric expansion valve 4 on first throttle pipeline, is provided with solenoid valve 5 on the second throttle pipe road, throttles in third Abacus 6 is set on pipeline；The operation of the control unit that throttles control electric expansion valve 4 and solenoid valve 5.
The throttling control method of the air-conditioner set specifically includes following step, shown in Figure 2.
Step S11: throttling control unit obtains actually detected value.
Actually detected value is one of suction superheat angle value, discharge superheat angle value or level value；Level value is divided into Two kinds of situations: the refrigerant in condenser and evaporator joint pipe road flows through the level value before throttling execution unit, condenser with Refrigerant in evaporator joint pipe road flows through the level value after throttling execution unit.
The suction superheat angle value of compressor, discharge superheat angle value, condenser and the level value in evaporator joint pipe road Acquisition methods are the prior art, and details are not described herein again.
Step S12: throttling control unit it is more actually detected value with high setting value, the size of low setting value, and according to than Relatively result controls the aperture of electric expansion valve and the switch of solenoid valve.
When entering throttling control, the original state of electric expansion valve and solenoid valve is to close.
When actually detected value is one of suction superheat angle value, discharge superheat angle value, level value, and the level value When flowing through the level value before throttling execution unit for the refrigerant in condenser and evaporator joint pipe road, to electric expansion valve and The control logic of solenoid valve is as follows:
If low setting value≤actually detected value≤high setting value illustrates that refrigerant flows through the flow before throttling execution unit In normal range (NR), then the control unit that throttles controls electric expansion valve and solenoid valve keeps current state.
If actually detected value is greater than high setting value, illustrates that the flow before refrigerant flows through throttling execution unit is excessive, need Reduce refrigerant flow through throttling execution unit before flow, can pass through increase electronic expansion valve opening or/and open solenoid valve It realizes.Throttling control unit judges whether the aperture of electric expansion valve is maximum opening value, if it is not, the control unit control that then throttles Electric expansion valve increases aperture, realizes the fine tuning to cold medium flux, to reduce the flow before refrigerant flows through throttling execution unit； If so, illustrating that the aperture of electric expansion valve has reached maximum opening value, but refrigerant flows through the flow before throttling execution unit still So excessive, then the control unit that throttles controls solenoid valve and opens, to reduce the flow before refrigerant flows through throttling execution unit.
If actually detected value is less than low setting value, illustrates that the flow before refrigerant flows through throttling execution unit is too small, need Increase refrigerant flow through throttling execution unit before flow, can pass through reduce electronic expansion valve opening or/and close solenoid valve It realizes.Throttling control unit judges whether the aperture of electric expansion valve is minimum opening value, if it is not, the control unit control that then throttles Electric expansion valve reduces aperture, realizes the fine tuning to cold medium flux, to increase the flow before refrigerant flows through throttling execution unit； If so, illustrating that the aperture of electric expansion valve has reached minimum opening value, but refrigerant flows through the flow before throttling execution unit still So too small, then the control unit that throttles controls solenoid valve and closes, to increase the flow before refrigerant flows through throttling execution unit.
When it is actually detected value be level value, and the level value be condenser flowed through with the refrigerant in evaporator joint pipe road Throttle execution unit after level value when, it is as follows to the control logic of electric expansion valve and solenoid valve:
If low setting value≤actually detected value≤high setting value illustrates that refrigerant flows through the flow after throttling execution unit In normal range (NR), then the control unit that throttles controls electric expansion valve and solenoid valve keeps current state.
If actually detected value is less than low setting value, illustrates that the flow after refrigerant flows through throttling execution unit is too small, need Increase refrigerant flow through throttling execution unit after flow, can pass through increase electronic expansion valve opening or/and open solenoid valve It realizes.Throttling control unit judges whether the aperture of electric expansion valve is maximum opening value, if it is not, the control unit control that then throttles Electric expansion valve increases aperture, realizes the fine tuning to cold medium flux, to increase the flow after refrigerant flows through throttling execution unit； If so, illustrating that the aperture of electric expansion valve has reached maximum opening value, but refrigerant flows through the flow after throttling execution unit still So too small, then the control unit that throttles controls solenoid valve and opens, to increase the flow after refrigerant flows through throttling execution unit.
If actually detected value is greater than high setting value, illustrates that the flow after refrigerant flows through throttling execution unit is excessive, need Reduce refrigerant and flow through flow after throttling execution unit, can pass through reduce electronic expansion valve opening or/to close solenoid valve real It is existing.Throttling control unit judges whether the aperture of electric expansion valve is minimum opening value, if it is not, the control unit control electricity that then throttles Sub- expansion valve reduces aperture, realizes the fine tuning to cold medium flux, to reduce the flow after refrigerant flows through throttling execution unit；If It is to illustrate that the aperture of electric expansion valve has reached minimum opening value, but refrigerant flows through the flow after throttling execution unit still Excessive, then the control unit that throttles controls solenoid valve and closes, to reduce the flow after refrigerant flows through throttling execution unit.
In the present embodiment, the high setting value is the high setting value of corresponding suction superheat, the setting of discharge superheat height Value, the high setting value of liquid level；The low setting value is the low setting value of corresponding suction superheat, the low setting value of discharge superheat, liquid The low setting value in position.That is, high setting value is the high setting value of suction superheat, low to set when actually detected value is suction superheat angle value Definite value is the low setting value of suction superheat；When actually detected value is discharge superheat angle value, high setting value is that discharge superheat is high Setting value, low setting value are the low setting value of discharge superheat；When actually detected value is level value, high setting value is that liquid level height is set Definite value, low setting value are the low setting value of liquid level.
The air-conditioner set throttling control method and air-conditioner set of the present embodiment, by by orifice plate, electric expansion valve, solenoid valve Parallel connection, and aperture control is carried out to electric expansion valve and switch control is carried out to solenoid valve, it increases flow and adjusts control model It encloses, improves flow regulating power, meet flow regulatory demand；The scope of application is wider, for example, meeting big load cold water Flow regulatory demand of the flow regulatory demand and heat pump unit of unit under various working, it is easy to promote and utilize.
The air-conditioner set throttling control method and air-conditioner set of the present embodiment, in condenser and evaporator joint pipe road When cold medium flux is excessive/too small, the slow adjusting for realizing cold medium flux to the aperture control of electric expansion valve is first passed through, is avoided cold Matchmaker's changes in flow rate is larger；Have reached the maximum/minimum opening value in the aperture of electric expansion valve, but cold medium flux still mistake Greatly/it is too small when, then switch control is carried out to solenoid valve, adjusting to cold medium flux is realized, so that cold medium flux returns to normal model In enclosing；By first using electronic expansion valve regulation cold medium flux, then by the method for electromagnetism valve regulation cold medium flux, avoid cold Matchmaker's changes in flow rate is very fast, improves the stability and safety of unit operation.
Since orifice plate itself can meet the flow regulatory demand of underload, in order to reduce the burden of unit, energy consumption is reduced, Energy waste is avoided, before step S11, whether throttling control unit detection unit load is more than or equal to assumed load.
If so, unit load is higher load condition, controlled into throttling, executes step S11；
If it is not, then unit load is low load condition, throttling control/do not enter throttling control is exited, it is no matter actually detected It is worth and how is high setting value, the size relation of low setting value, electric expansion valve and solenoid valve is all in closed state.
In the present embodiment, assumed load is 40%~60%, is low load condition when unit load < assumed load, It only needs orifice plate that can meet the flow regulatory demand of unit, reduces the burden of throttling control unit, reduce energy consumption, avoid energy Source waste.In the present embodiment, assumed load is preferably 50%, not only reduces energy consumption, but also meets the flow adjusting need of unit It asks.Certainly, assumed load can be selected according to the actual situation, however it is not limited to the example above.
Maximum opening value, minimum opening value, the high setting value of suction superheat, the low setting value of suction superheat, discharge superheat The selection for spending the low setting value of high setting value, discharge superheat can be selected according to specific actual conditions.
In the present embodiment, maximum opening value is 70%~90%, preferably 80%.
In the present embodiment, minimum opening value is 20%~40%, preferably 30%.
In the present embodiment, the high setting value of suction superheat is 2 DEG C, and the low setting value of suction superheat is 0 DEG C.Discharge superheat Spending high setting value is 2 DEG C, and the low setting value of discharge superheat is 0 DEG C.
In the following, specifically tell about when actually detected value be suction superheat angle value, discharge superheat angle value, level value wherein One of, and the level value flows through the level value before throttling execution unit for the refrigerant in condenser and evaporator joint pipe road When, the specific steps for the control method that throttles are shown in Figure 3.
Step S21: throttling control unit judges whether unit load is more than or equal to assumed load.
If so, unit load is higher load condition, controlled into throttling, executes step S22.
If it is not, then unit load is low load condition, exit/do not enter throttling control.No matter actually detected value is set with height How are definite value, the size relation of low setting value, and electric expansion valve and solenoid valve are all in closed state.
Step S22: throttling control unit obtains actually detected value.
Actually detected value is one of suction superheat angle value, discharge superheat angle value, level value, and the level value is Refrigerant in condenser and evaporator joint pipe road flows through the level value before throttling execution unit.
Step S23: throttling control unit judges whether actually detected value is greater than high setting value.
If so, thening follow the steps S24.
If it is not, thening follow the steps S27.
Step S24: throttling control unit judges whether the aperture of electric expansion valve is maximum opening value.
If it is not, thening follow the steps S25.
If so, thening follow the steps S26.
Step S25: throttling control unit control electric expansion valve increases aperture, and return step S21.
Step S26: throttling control unit control solenoid valve is opened, and return step S21.
Step S27: throttling control unit judges whether actually detected value is less than low setting value.
If it is not, thening follow the steps S28.
If so, thening follow the steps S29.
Step S28: throttling control unit control electric expansion valve and solenoid valve keep current state, and return step S21.
Step S29: throttling control unit judges whether the aperture of electric expansion valve is minimum opening value.
If it is not, thening follow the steps S30.
If so, thening follow the steps S31.
Step S30: throttling control unit control electric expansion valve reduces aperture, and return step S21.
Step S31: throttling control unit control solenoid valve is closed, and return step S21.
In the following, specifically telling about when actually detected value is level value, and the level value is that condenser and evaporator connect When refrigerant in adapter tube road flows through the level value after throttling execution unit, the specific steps for the control method that throttles, institute referring to fig. 4 Show.
Step S41: throttling control unit judges whether unit load is more than or equal to assumed load.
If so, unit load is higher load condition, controlled into throttling, executes step S42.
If it is not, then unit load is low load condition, exit/do not enter throttling control.No matter actually detected value is set with height How are definite value, the size relation of low setting value, and electric expansion valve and solenoid valve are all in closed state.
Step S42: throttling control unit obtains actually detected value.
Actually detected value is level value, and the level value flows through section for the refrigerant in condenser and evaporator joint pipe road Flow the level value after execution unit.
Step S43: throttling control unit judges whether actually detected value is less than low setting value.
If so, thening follow the steps S44.
If it is not, thening follow the steps S47.
Step S44: throttling control unit judges whether the aperture of electric expansion valve is maximum opening value.
If it is not, thening follow the steps S45.
If so, thening follow the steps S46.
Step S45: throttling control unit control electric expansion valve increases aperture, and return step S41.
Step S46: throttling control unit control solenoid valve is opened, and return step S41.
Step S47: throttling control unit judges whether actually detected value is greater than high setting value.
If it is not, thening follow the steps S48.
If so, thening follow the steps S49.
Step S48: throttling control unit control electric expansion valve and solenoid valve keep current state, and return step S41.
Step S49: throttling control unit judges whether the aperture of electric expansion valve is minimum opening value.
If it is not, thening follow the steps S50.
If so, thening follow the steps S51.
Step S50: throttling control unit control electric expansion valve reduces aperture, and return step S41.
Step S51: throttling control unit control solenoid valve is closed, and return step S41.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although referring to aforementioned reality Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.

Claims (8)

  1. The control method 1. a kind of air-conditioner set throttles, it is characterised in that: the air-conditioner set includes compressor, condenser, evaporation Device, throttling execution unit and throttling control unit；The throttling execution unit is connected on the connecting line of condenser and evaporator In；The throttling execution unit includes first throttle pipeline in parallel, the second throttling pipeline, third throttling pipeline, described the One throttle pipe road is provided with electric expansion valve, is provided with solenoid valve on second throttle pipe road, throttles in the third Abacus is set on pipeline；
    The throttling control method includes:
    (1) the throttling control unit obtains actually detected value;
    The actually detected value is one of suction superheat angle value, discharge superheat angle value, level value；
    (2) the throttling control unit actually detected value and high setting value, the size of low setting value, and according to comparing As a result the aperture of electric expansion valve and the switch of solenoid valve are controlled；
    (21) when the actually detected value is one of suction superheat angle value, discharge superheat angle value, level value, and the liquid When place value is the level value before the refrigerant in condenser and evaporator joint pipe road flows through throttling execution unit:
    If low setting value≤actually detected value≤high setting value, controls electric expansion valve and solenoid valve keeps current state；
    If actually detected value is greater than high setting value, judge whether the aperture of electric expansion valve is maximum opening value, if it is not, then Increase electronic expansion valve opening；If so, opening solenoid valve；
    If actually detected value is less than low setting value, judge whether the aperture of electric expansion valve is minimum opening value, if it is not, then Reduce electronic expansion valve opening；If so, closing solenoid valve；
    (22) when the actually detected value is level value, and the level value is the refrigerant in condenser and evaporator joint pipe road When flowing through the level value after throttling execution unit:
    If low setting value≤actually detected value≤high setting value, controls electric expansion valve and solenoid valve keeps current state；
    If actually detected value is less than low setting value, judge whether the aperture of electric expansion valve is maximum opening value, if it is not, then Increase electronic expansion valve opening；If so, opening solenoid valve；
    If actually detected value is greater than high setting value, judge whether the aperture of electric expansion valve is minimum opening value, if it is not, then Reduce electronic expansion valve opening；If so, closing solenoid valve；
    The high setting value is the high setting value of corresponding suction superheat, the high setting value of discharge superheat, the high setting value of liquid level；Institute Stating low setting value is the low setting value of corresponding suction superheat, the low setting value of discharge superheat, the low setting value of liquid level.
  2. The control method 2. air-conditioner set according to claim 1 throttles, it is characterised in that: before the step (1), institute State method further include:
    Whether the throttling control unit detection unit load is more than or equal to assumed load；
    If so, entering throttling control, the step (1) is executed.
  3. The control method 3. air-conditioner set according to claim 2 throttles, it is characterised in that: the assumed load is 40%~ 60%。
  4. The control method 4. air-conditioner set according to claim 1 throttles, it is characterised in that: the maximum opening value is 70% ~90%, the minimum opening value is 20%~40%.
  5. The control method 5. air-conditioner set according to claim 1 throttles, it is characterised in that: the suction superheat height setting Value is 2 DEG C, and the low setting value of the suction superheat is 0 DEG C.
  6. The control method 6. air-conditioner set according to claim 1 throttles, it is characterised in that: the discharge superheat height setting Value is 2 DEG C, and the low setting value of the discharge superheat is 0 DEG C.
  7. 7. a kind of air-conditioner set, it is characterised in that: including compressor, condenser, evaporator, throttling execution unit and throttling control Unit；The throttling execution unit is connected in the connecting line of condenser and evaporator；The throttling execution unit includes simultaneously The first throttle pipeline of connection, the second throttling pipeline, third throttling pipeline, are provided with electronic expansion on the first throttle pipeline Valve is provided with solenoid valve on second throttle pipe road, and abacus is arranged on third throttle pipe road；
    The throttling control unit is for obtaining actually detected value;The actually detected value is suction superheat angle value, discharge superheat One of angle value, level value；
    The throttling control unit for it is more described it is actually detected value with high setting value, the size of low setting value, and according to than Relatively result controls the aperture of electric expansion valve and the switch of solenoid valve；
    When the actually detected value is one of suction superheat angle value, discharge superheat angle value, level value, and the level value When flowing through the level value before throttling execution unit for the refrigerant in condenser and evaporator joint pipe road:
    The throttling control unit is used to control electric expansion valve and electricity in low setting value≤actually detected value≤high setting value Magnet valve keeps current state；
    The throttling control unit be used to judge when actually detected value is greater than high setting value electric expansion valve aperture whether be Maximum opening value, if it is not, then the throttling control unit control electric expansion valve increases aperture；If so, the throttling control Unit controls solenoid valve and opens；
    The throttling control unit be used to judge when actually detected value is less than low setting value electric expansion valve aperture whether be Minimum opening value, if it is not, then the throttling control unit control electric expansion valve reduces aperture；If so, the throttling control Unit controls solenoid valve and closes；
    When it is described it is actually detected value be level value, and the level value be condenser flowed through with the refrigerant in evaporator joint pipe road Throttle execution unit after level value when:
    The throttling control unit is used to control electric expansion valve and electricity in low setting value≤actually detected value≤high setting value Magnet valve keeps current state；
    The throttling control unit be used to judge when actually detected value is less than low setting value electric expansion valve aperture whether be Maximum opening value, if it is not, then the throttling control unit control electric expansion valve increases aperture；If so, the throttling control Unit controls solenoid valve and opens；
    The throttling control unit be used to judge when actually detected value is greater than high setting value electric expansion valve aperture whether be Minimum opening value, if it is not, then the throttling control unit control electric expansion valve reduces aperture；If so, the throttling control Unit controls solenoid valve and closes；
    The high setting value is the high setting value of corresponding suction superheat, the high setting value of discharge superheat, the high setting value of liquid level；Institute Stating low setting value is the low setting value of corresponding suction superheat, the low setting value of discharge superheat, the low setting value of liquid level.
  8. 8. air-conditioner set according to claim 7, it is characterised in that: it is negative that the throttling control unit is also used to detect unit Whether lotus is more than or equal to assumed load, and when being more than or equal to assumed load, controls into throttling.
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CN107270518B (en) * 2017-07-26 2020-05-05 美的集团武汉制冷设备有限公司 Air conditioning system, and control device and method of air conditioning system
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CN107449110B (en) * 2017-07-26 2020-07-28 美的集团武汉制冷设备有限公司 Air conditioning system, and control device and method of air conditioning system
CN107906813A (en) * 2017-10-31 2018-04-13 广东美的暖通设备有限公司 The control method and air conditioner of air conditioner
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