CN104848489A - Control method for air conditioner - Google Patents
Control method for air conditioner Download PDFInfo
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- CN104848489A CN104848489A CN201510250998.5A CN201510250998A CN104848489A CN 104848489 A CN104848489 A CN 104848489A CN 201510250998 A CN201510250998 A CN 201510250998A CN 104848489 A CN104848489 A CN 104848489A
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- control method
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Classifications
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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
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F2110/00—Control inputs relating to air properties
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- 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)
Abstract
The invention discloses a control method for an air conditioner. The control method for the air conditioner includes steps that starting a main cylinder, and controlling a first control valve to locate at the maximum opening degree so as to open an auxiliary cylinder; detecting the running current I of a variable-volume compressor, and judging whether the running current I is larger than a set current value IB; when the running current I is larger than the set current value IB, reducing the opening degree of the first control valve by a first preset opening degree at each time, when the running current I is less than or equal to the set current value, keeping the opening degree of the first control valve. According to the control method for the air conditioner, through detecting the running current I, comparing the running current I with the set current value IB, controlling the opening degree of the first control valve according to the comparison result and changing the refrigerant quantity output to a subsequent heat exchange device from the auxiliary cylinder to gently control an indoor temperature, the reliability of the variable-volume compressor can be improved, and the comfort can be improved in a certain degree.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of control method of air-conditioner.
Background technology
At present, on air-conditioner, application has constant speed positive displacement compressor, and this positive displacement compressor has two cylinders.In correlation technique, when air-conditioner is opened, open master cylinder, then judge indoor demand, open as required or suspend auxiliary cylinder, but this method is when the auxiliary cylinder of start-stop, and indoor temperature change generated in case is comparatively large, cannot control gently, reduce Consumer's Experience.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the present invention proposes a kind of control method of air-conditioner, and the control method of this air-conditioner can carry out mild control to the temperature of indoor, thus improves comfortableness to a certain extent.
According to the control method of the air-conditioner of the embodiment of the present invention, described air-conditioner comprises positive displacement compressor, first control valve adjustable with aperture, described positive displacement compressor has exhaust outlet, gas returning port, blow vent, master cylinder and auxiliary cylinder, described blow vent is communicated with the slide plate chamber of described auxiliary cylinder, the second control valve is in series with between described gas returning port and described blow vent, the two ends of described first control valve are connected with described blow vent with described exhaust outlet, described control method comprises the steps: S1: open described master cylinder, the aperture controlling described first control valve is maximum to open described auxiliary cylinder, S2: the running current I detecting described positive displacement compressor, and judge whether running current I is greater than setting current value IB, S3: when described running current I > sets current value IB, the aperture of described first control valve reduces the first predetermined aperture at every turn, as described running current I≤setting current value IB, keeps the aperture of the first control valve constant.
According to the control method of the air-conditioner of the embodiment of the present invention, first master cylinder is opened, and the aperture controlling the first control valve is maximum to open auxiliary cylinder, then detect the running current I of positive displacement compressor and judge whether running current I is greater than setting current value IB, if running current I is greater than setting current value IB, then the aperture of the first control valve is reduced the first predetermined aperture at every turn, if running current I is less than or equal to setting current value IB, then keep the aperture of the first control valve constant.Therefore, the control method of the air-conditioner of the embodiment of the present invention can by detecting running current I and running current I and setting current value IB being compared, the aperture of the first control valve is controlled according to comparative result, thus regulate auxiliary cylinder to output to the amount of the refrigerant in follow-up exchange piece, and then mild control is carried out to the temperature of indoor, improve comfortableness to a certain extent.
According to some embodiments of the present invention, also comprise the steps: S4 after step s 3: detect indoor environment temperature T1, and judge whether indoor environment temperature T1 is greater than design temperature Ts; S5: as described indoor environment temperature T1 > design temperature Ts, then keep the aperture of described first control valve; As indoor environment temperature T1≤design temperature Ts, detect the aperture of described first control valve, if described first control valve is in open mode, the aperture of described first control valve is reduced the second predetermined aperture, if described first control valve is closed, keep closed condition.
Preferably, in step sl, after the described master cylinder of unlatching, delay predetermined time opens described first control valve to open described auxiliary cylinder.
Alternatively, the span of the described scheduled time is 0s ~ 60s.
Alternatively, described first control valve is electric expansion valve or magnetic valve.
Particularly, described second control valve is from described gas returning port to the check valve of one-way conduction on the direction of described blow vent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the air-conditioner according to the embodiment of the present invention;
Fig. 2 is the flow chart of the control method of air-conditioner according to the embodiment of the present invention;
Fig. 3 is the flow chart of the control method of air-conditioner according to the specific embodiment of the invention.
Reference numeral:
100: air-conditioner;
11: master cylinder; 12: auxiliary cylinder; A: exhaust outlet; B: gas returning port; B ': blow vent
2: commutation assembly; D: the first valve port; C: the second valve port; E: the three valve port; S: the four valve port;
3: outdoor heat exchanger; 4: indoor heat exchanger; 5: restricting element;
6: the first control valves; 7: the second control valves;
8: gas-liquid separator;
91: the first three-way pipes; 92: the second three-way pipes; 93: the three three-way pipes.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", term should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
The control method of the air-conditioner proposed according to the embodiment of the present invention is described with reference to the accompanying drawings.
First with reference to figure 1 describe the control method that the embodiment of the present invention proposes the structure of applicable air-conditioner 100.
As shown in Figure 1, air-conditioner 100 can comprise: positive displacement compressor, commutation assembly 2, outdoor heat exchanger 3, indoor heat exchanger 4, restricting element 5, first control valve 6, second control valve 7, first three-way pipe 91, second three-way pipe 92 and the 3rd three-way pipe 93.Be understandable that, air-conditioner 100 also comprises controller, and controller and positive displacement compressor, commutate assembly 2, first control valve 6 and the second control valve 7 are connected to control the running status of each parts.
As shown in Figure 1, positive displacement compressor has exhaust outlet A, gas returning port B, blow vent B ', master cylinder 11 and auxiliary cylinder 12.As shown in Figure 1, blow vent B ' can be communicated with the slide plate chamber of auxiliary cylinder 12, thus, refrigerant after master cylinder 11 compresses can be discharged from exhaust outlet A, auxiliary cylinder 12 can be utilized to assist master cylinder 11 pairs of refrigerants to compress, thus increase the amount of refrigerant in follow-up heat-exchange system, improve heat exchange efficiency, after completing follow-up heat exchange, refrigerant can flow back to positive displacement compressor from gas returning port B, realizes circulation.
Commutation assembly 2 can have the first valve port D, the second valve port C, the 3rd valve port E and the 4th valve port S.Specifically, as shown in Figure 1, first valve port D can be communicated with one of them in the 3rd valve port E with the second valve port C, 4th valve port S can be communicated with another in the 3rd valve port E with the second valve port C, and the first valve port D is connected with blow vent B ' with the exhaust outlet A of positive displacement compressor, 4th valve port S is connected with gas returning port B, like this, high pressure refrigerant through positive displacement compressor compression can flow to the first valve port D of commutation assembly 2 after exhaust outlet A discharge, and discharge from the second valve port C or the 3rd valve port E, flow to follow-up exchange piece, when refrigerant flows back to positive displacement compressor, the 4th valve port S can be flowed to from the second valve port C and the 3rd valve port E, and flow to gas returning port B from the 4th valve port S, and then flow back to compressor, realize recycling of refrigerant.
As preferred embodiment, commutation assembly 2 can be cross valve, thus can make the simple and compact for structure of air-conditioner 100.Certainly, be understandable that, commutation assembly 2 can also be formed as other structures, and can carry out commutating as long as have the first valve port D to the 4th valve port S, to this, the present invention does not do concrete restriction.
As shown in Figure 1, one end of outdoor heat exchanger 3 can be connected with the second valve port C, the first end of indoor heat exchanger 4 can be connected with the 3rd valve port E, and, restricting element 5 can be in series with between the other end of outdoor heat exchanger 3 and the second end of indoor heat exchanger 4, like this, when air-conditioner 100 running refrigerating, refrigerant after positive displacement compressor compression can flow into outdoor heat exchanger 3 from the second valve port C, indoor heat exchanger 4 is flowed to after restricting element 5 reducing pressure by regulating flow, then commutation assembly 2 can be got back to from the 3rd valve port E, and then flow back to positive displacement compressor from the 4th valve port S, complete kind of refrigeration cycle, as shown in the solid arrow in Fig. 1.
And when air-conditioner 100 operation heats, refrigerant after positive displacement compressor compression can flow into indoor heat exchanger 4 from the 3rd valve port E through the first end of indoor heat exchanger 4, indoor heat exchanger 4 second end flow out after through restricting element 5 reducing pressure by regulating flow, then outdoor heat exchanger 3 is flowed to, then commutation assembly 2 is flowed into, flow back to positive displacement compressor from the 4th valve port S again, complete and heat circulation, as shown in the dotted arrow in Fig. 1.
According to some embodiments of the present invention, restricting element 5 can be capillary, can to the step-down of high pressure coolant throttle by capillary, to realize heat exchange.Certainly, the present invention is not limited to this, and restricting element 5 also can be electric expansion valve, is realized automatic adjustment and the reducing pressure by regulating flow of cold medium flux in air-conditioner 100, can realize the heat exchange effect of refrigerant and environment further by electric expansion valve.
As shown in Figure 1, three mouths of pipe of the first three-way pipe 91 are connected with the first valve port D of the assembly 2 that commutates with one end of exhaust outlet A, the first control valve 6 respectively.Three mouths of pipe of the second three-way pipe 92 are connected with the first end of the second control valve 7 with the other end of blow vent B ', the first control valve 6 respectively, and three mouths of pipe of the 3rd three-way pipe 93 are connected with gas returning port B with commutation the 4th valve port S of assembly 2, the second end of the second control valve 7 respectively.Wherein, the first control valve 6 is electric expansion valve or magnetic valve.Second control valve 7 can be check valve or magnetic valve.When the second control valve 7 is check valve, check valve is one-way conduction on the direction from the 3rd three-way pipe 93 to the second three-way pipe 92, and namely check valve is from gas returning port B to one-way conduction on the direction of blow vent B '.
The aperture of the first control valve 6 can be adjustable, when the first control valve 6 is in open mode, now because exhaust outlet A is communicated with blow vent B ', therefore blow vent B ' is in hyperbaric environment, thus the slide plate chamber in auxiliary cylinder 12 is in hyperbaric environment, slide plate in auxiliary cylinder 12 can only be against on the periphery wall of piston, thus auxiliary cylinder 12 can carry out compressed action.When the first control valve 6 is in closed condition, now because gas returning port B is communicated with blow vent B ', therefore blow vent B ' is in environment under low pressure, thus the slide plate chamber in auxiliary cylinder 12 is in environment under low pressure, slide plate in auxiliary cylinder 12 departs from the periphery wall of piston and coordinates, thus auxiliary cylinder 12 stops compressed action.Thus when the first control valve 6 is opened, by the environment of the aperture adjustment blow vent B ' of adjustment first control valve 6, thus the decrement of auxiliary cylinder 12 can be adjusted, and then adjust the amount of the refrigerant in circulation.
As preferred embodiment, as shown in Figure 1, air-conditioner 100 can also comprise gas-liquid separator 8.Specifically, gas-liquid separator 8 can have gas-liquid entrance and gas vent, and wherein, as shown in Figure 1, gas-liquid entrance can connect with the 4th valve port S-phase, and gas vent can be connected with gas returning port B.Thus; by gas-liquid separator 8, the refrigerant flowing back to positive displacement compressor through the 4th valve port S can be separated; the refrigerant of gaseous state can be flowed out from gas vent; positive displacement compressor is flowed back to further from gas returning port B; thus ensure to only have gaseous coolant to be expelled back in positive displacement compressor; avoid positive displacement compressor generation liquid hit phenomenon, and then to a certain extent for positive displacement compressor provides protection, extend its service life.
Fig. 2 is the flow chart of the control method of air-conditioner according to the embodiment of the present invention.Wherein, this air-conditioner can be the air-conditioner 100 of above-described embodiment description.
As shown in Figure 2, the control method according to the air-conditioner of the embodiment of the present invention comprises the following steps: S1, unlatching master cylinder, the aperture controlling the first control valve is maximum to open auxiliary cylinder.
The running current I of S2, detection positive displacement compressor, and judge whether running current I is greater than setting current value IB, and specifically, controller detects the running current I of positive displacement compressor; Running current I and setting electric current I B is compared.
It should be noted that; before air-conditioner brings into operation; need in controller, arrange setting current value IB; setting current value IB can be a value of the safe current being less than motor in positive displacement compressor, like this, when the current of electric of positive displacement compressor exceedes this current value; controller can carry out subsequent control; thus avoid positive displacement compressor to transship, to a certain extent positive displacement compressor is protected, and then extend its service life.
S3, when running current I > set current value IB time, the aperture of the first control valve reduces the first predetermined aperture at every turn, as running current I≤setting current value IB, keeps the aperture of the first control valve constant.
Specifically, when controller to running current I and setting electric current I B relatively after, when running current I is greater than setting electric current I B, controller can control the first control valve and the aperture of the first control valve is reduced the first predetermined aperture, such as, first predetermined aperture can be 20 steps, thus reduces the flow that auxiliary cylinder is discharged to the refrigerant of follow-up exchange piece.Like this; on the one hand; the motor load of positive displacement compressor can be reduced, thus avoid motor to be in overload for a long time, provide protection to positive displacement compressor; improve the reliability of positive displacement compressor; on the other hand, the amount of the refrigerant exported by regulating auxiliary cylinder, can also make the adjustment of indoor temperature more tend towards stability; avoid indoor temperature to change suddenly at short notice, thus improve comfort level when regulating temperature.
And when controller to running current I and setting electric current I B relatively after obtain running current I be less than or equal to setting electric current I B result time, keep the aperture of the first control valve constant.Thus, under the prerequisite of positive displacement compressor nonoverload, the decrement of auxiliary cylinder can be ensured, worked by master cylinder and auxiliary cylinder simultaneously, improve the amount of system mesohigh refrigerant, thus improve heat exchange efficiency, make room temperature can reach design temperature more quickly, meet the demand of user.
According to the control method of the air-conditioner of the embodiment of the present invention, by detecting the running current I of positive displacement compressor, and running current I and setting current value IB are compared, whether the aperture controlling the first control valve according to comparative structure changes, thus can under the prerequisite ensureing positive displacement compressor Absorbable organic halogens reliability service, make room temperature change steadily, improve comfortableness.
According to some embodiments of the present invention, the control method of above-mentioned air-conditioner can also comprise:
S4, detection indoor environment temperature T1, and judge whether indoor environment temperature T1 is greater than design temperature Ts.
Particularly, after air-conditioner starts, controller obtains indoor environment temperature T1 and the operational mode of air-conditioner, and compares indoor environment temperature T1 and design temperature Ts according to above-mentioned information, judge whether indoor environment temperature T1 is greater than design temperature Ts, for subsequent control provides foundation.
S5, as indoor environment temperature T1 > design temperature Ts, keep the aperture of the first control valve constant; As indoor environment temperature T1≤design temperature Ts, detect the aperture of the first control valve, if the first control valve is in open mode, the aperture of the first control valve is reduced the second predetermined aperture, if the first control valve is closed, keep closed condition.
Specifically, when air-conditioner be in refrigeration mode time, controller compares the indoor environment temperature T1 detected and design temperature Ts, if indoor environment temperature T1 is greater than the design temperature Ts of user, then keep the aperture of the first control valve constant, make auxiliary cylinder assist master cylinder to continue to compress refrigerant, to ensure the amount of the refrigerant participating in circulation in air-conditioner, ensure that room temperature can reach design temperature more quickly, meet the demand of user.
When being less than or equal to design temperature Ts under the regulating action of indoor temperature T1 at air-conditioner, then represent and reached refrigeration demand, now the opening of the first control valve is detected, if the first control valve is in open mode, then the aperture of the first control valve is reduced the second predetermined aperture, such as, second predetermined aperture can be 10 steps, thus reduce the flow that auxiliary cylinder is discharged to the refrigerant of follow-up exchange piece, reduce air-conditioner to the cooling-down effect of indoor, the adjustment of indoor temperature is more tended towards stability, while improving comfortableness, can electric energy be saved; If the first control valve is in closed condition, then illustrate that auxiliary cylinder has stopped auxiliary master cylinder compression refrigerant, now keep the first control valve to be in closed condition, the electric energy that positive displacement compressor consumes can not only be reduced, and indoor temperature can be regulated preferably, thus improve comfort level.
According to some embodiments of the present invention, in step sl, after unlatching master cylinder, delay predetermined time opens the first control valve, and makes the aperture of the first control valve maximum, assists master cylinder to compress refrigerant to open auxiliary cylinder.Thus the effect of protection can be played to positive displacement compressor.
Be understandable that, before air-conditioner brings into operation, need to set the scheduled time in controller.Alternatively, the scheduled time can be the Default Value of air-conditioner, also can be arranged by User Defined.Thus, when air-conditioner bring into operation carry out heat exchange time, master cylinder open refrigerant is compressed, utilize master cylinder to be delivered in system by high pressure refrigerant and carry out follow-up heat exchange, avoid room temperature significantly to change, thus improve comfort level to a certain extent.Open the first control valve after delay predetermined time, auxiliary cylinder is also compressed refrigerant, worked by master cylinder and auxiliary cylinder simultaneously, the amount of system mesohigh refrigerant can be improved, thus raising heat exchange efficiency, make room temperature can reach design temperature fast, meet the demand of user.
According to specific embodiments more of the present invention, the span of the scheduled time can be 0s-60s, such as, the scheduled time can be 40s, by setting the scheduled time of 40s, the rate of change that room temperature can be avoided to start when changing is too large, makes air-conditioner comparatively mild to the adjustment of indoor temperature, thus improves the comfort level of user to a certain extent.
Below in conjunction with Fig. 3, the step of the control method of the air-conditioner of a concrete example according to the present invention is described in detail.Before air-conditioner brings into operation, the timer in controller resets, and need arrange scheduled time t1, setting current value IB, the first predetermined aperture, design temperature Ts and the second predetermined aperture etc.
S001, after air-conditioner runs, opens master cylinder, by master cylinder compression refrigerant, realizes heat exchange.
S002, during timer.
S003, judges whether the duration t that master cylinder runs is greater than scheduled time t1.If so, step S004 is performed; If not, execution step S002 is returned.
S004, the first control valve standard-sized sheet, makes auxiliary cylinder start auxiliary master cylinder and compresses refrigerant, increases the amount of the refrigerant in heat-exchange system.
S005, detects the running current I of positive displacement compressor.
S006, judges whether the running current I of positive displacement compressor is greater than setting current value IB.If so, step S007 is performed; If not, step S008 is performed.
S007, the first control valve reduces the first predetermined aperture, exports refrigerant in system to, returns step S005, continue the running current I detecting positive displacement compressor to reduce auxiliary cylinder.
S008, keeps the aperture of the first control valve constant.
S009, detects indoor environment temperature T1.
S010, judges whether indoor environment temperature T1 is greater than design temperature Ts.If so, step S008 is returned; If not, step S011 is performed.
S011, detects the aperture of the first control valve.
S012, judges whether the first control valve is in opening.If so, step S013 is performed; If not, step S008 is returned.
S013, the aperture of the first control valve reduces the second predetermined aperture, reduces auxiliary cylinder and exports refrigerant in system to, then return step S009, continues to detect indoor environment temperature TI.
In sum, according to the control method of the air-conditioner of the embodiment of the present invention, first master cylinder is opened, the aperture controlling the first control valve after delay scheduled time is maximum to open auxiliary cylinder, then detect the running current I of positive displacement compressor and running current I and setting current value IB are compared, if running current I is greater than setting current value IB, the aperture of the first control valve reduces the first predetermined aperture at every turn, to improve the reliability of positive displacement compressor; If running current I is less than or equal to setting current value IB, then keep the aperture of the first control valve constant.When air-conditioner is in refrigeration mode, can also compare indoor environment temperature T1 and design temperature Ts, when indoor environment temperature is greater than design temperature, keep the aperture of the first control valve, and when indoor environment temperature is less than or equal to design temperature, detect the aperture of the first control valve, if the first control valve is in open mode, then the aperture of the first control valve is reduced the second predetermined aperture, to reduce the amount that auxiliary cylinder is transported to the high pressure refrigerant in system, if the first control valve is in closed condition, then keep closing.Therefore, the control method of the air-conditioner of the embodiment of the present invention can not only improve the reliability of compressor, and the adjustment of indoor temperature can be made more to tend towards stability, thus improves comfortableness.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (6)
1. the control method of an air-conditioner, it is characterized in that, described air-conditioner comprises positive displacement compressor and adjustable the first control valve of aperture, described positive displacement compressor has exhaust outlet, gas returning port, blow vent, master cylinder and auxiliary cylinder, described blow vent is communicated with the slide plate chamber of described auxiliary cylinder, be in series with the second control valve between described gas returning port and described blow vent, the two ends of described first control valve are connected with described blow vent with described exhaust outlet, and described control method comprises the steps:
S1: open described master cylinder, the aperture controlling described first control valve is maximum to open described auxiliary cylinder;
S2: the running current I detecting described positive displacement compressor, and judge whether running current I is greater than setting current value IB;
S3: when described running current I > sets current value IB, the aperture of described first control valve reduces the first predetermined aperture at every turn, as described running current I≤setting current value IB, keeps the aperture of the first control valve constant.
2. the control method of air-conditioner according to claim 1, is characterized in that, also comprises the steps: after step s 3
S4: detect indoor environment temperature T1, and judge whether indoor environment temperature T1 is greater than design temperature Ts;
S5: as described indoor environment temperature T1 > design temperature Ts, then keep the aperture of described first control valve;
As indoor environment temperature T1≤design temperature Ts, detect the aperture of described first control valve, if described first control valve is in open mode, the aperture of described first control valve is reduced the second predetermined aperture, if described first control valve is closed, keep closed condition.
3. the control method of air-conditioner according to claim 1, is characterized in that, in step sl, after the described master cylinder of unlatching, delay predetermined time opens described first control valve to open described auxiliary cylinder.
4. the control method of air-conditioner according to claim 3, is characterized in that, the span of the described scheduled time is 0s ~ 60s.
5. the control method of air-conditioner according to claim 1, is characterized in that, described first control valve is electric expansion valve or magnetic valve.
6. the control method of air-conditioner according to claim 1, is characterized in that, described second control valve is from described gas returning port to the check valve of one-way conduction on the direction of described blow vent.
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| CN201510250998.5A CN104848489B (en) | 2015-05-15 | 2015-05-15 | The control method of air conditioner |
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| CN201510250998.5A CN104848489B (en) | 2015-05-15 | 2015-05-15 | The control method of air conditioner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864980A (en) * | 2016-04-25 | 2016-08-17 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN106500266A (en) * | 2016-10-27 | 2017-03-15 | 广东美的制冷设备有限公司 | The control method and device of air-conditioner and its duplex cylinder compressor |
| CN106801977A (en) * | 2017-01-09 | 2017-06-06 | 美的集团股份有限公司 | A kind of adjusting method of conditioners running conditions, system and air-conditioner |
| CN106895550A (en) * | 2017-02-06 | 2017-06-27 | 广东美的暖通设备有限公司 | The guard method of motor overload and system |
| CN107289591A (en) * | 2017-06-30 | 2017-10-24 | 广东美的制冷设备有限公司 | Control method, control system, air conditioner and the computer installation of air conditioner |
| CN107702270A (en) * | 2017-10-11 | 2018-02-16 | 珠海格力电器股份有限公司 | Control method for electronic expansion valve and device, air-conditioning |
| CN110006138A (en) * | 2019-03-01 | 2019-07-12 | 青岛海尔空调电子有限公司 | Prevent the control method and control system of the compressor liquid hammer of air conditioner |
| CN111141004A (en) * | 2020-01-07 | 2020-05-12 | 宁波奥克斯电气股份有限公司 | Control method and device of air conditioner and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864980A (en) * | 2016-04-25 | 2016-08-17 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN105864980B (en) * | 2016-04-25 | 2019-03-12 | 广东美的制冷设备有限公司 | Air conditioner and its control method |
| CN106500266A (en) * | 2016-10-27 | 2017-03-15 | 广东美的制冷设备有限公司 | The control method and device of air-conditioner and its duplex cylinder compressor |
| CN106801977A (en) * | 2017-01-09 | 2017-06-06 | 美的集团股份有限公司 | A kind of adjusting method of conditioners running conditions, system and air-conditioner |
| CN106801977B (en) * | 2017-01-09 | 2019-03-15 | 美的集团股份有限公司 | A kind of adjusting method of conditioners running conditions, system and air conditioner |
| CN106895550A (en) * | 2017-02-06 | 2017-06-27 | 广东美的暖通设备有限公司 | The guard method of motor overload and system |
| CN107289591A (en) * | 2017-06-30 | 2017-10-24 | 广东美的制冷设备有限公司 | Control method, control system, air conditioner and the computer installation of air conditioner |
| CN107702270A (en) * | 2017-10-11 | 2018-02-16 | 珠海格力电器股份有限公司 | Control method for electronic expansion valve and device, air-conditioning |
| CN110006138A (en) * | 2019-03-01 | 2019-07-12 | 青岛海尔空调电子有限公司 | Prevent the control method and control system of the compressor liquid hammer of air conditioner |
| CN110006138B (en) * | 2019-03-01 | 2022-10-25 | 青岛海尔空调电子有限公司 | Control method and control system for preventing compressor of air conditioner from liquid impact |
| CN111141004A (en) * | 2020-01-07 | 2020-05-12 | 宁波奥克斯电气股份有限公司 | Control method and device of air conditioner and air conditioner |
| CN111141004B (en) * | 2020-01-07 | 2022-01-25 | 宁波奥克斯电气股份有限公司 | Control method and device of air conditioner and air conditioner |
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