CN100381762C - Engine driven air conditioner and control method therefor - Google Patents
Engine driven air conditioner and control method therefor Download PDFInfo
- Publication number
- CN100381762C CN100381762C CNB2005100659240A CN200510065924A CN100381762C CN 100381762 C CN100381762 C CN 100381762C CN B2005100659240 A CNB2005100659240 A CN B2005100659240A CN 200510065924 A CN200510065924 A CN 200510065924A CN 100381762 C CN100381762 C CN 100381762C
- Authority
- CN
- China
- Prior art keywords
- engine
- valve opening
- information
- load
- air conditioner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/026—Compressor control by controlling unloaders
- F25B2600/0261—Compressor control by controlling unloaders external to the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/17—Speeds
- F25B2700/171—Speeds of the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/025—Motor control arrangements
Abstract
In an engine driving type air conditioner (100) and a method of controlling the air conditioner, information on at least one of the rotational number of an engine (10), the opening degree of a fuel adjusting valve (35) and the opening degree of a throttle (36) is achieved, it is judged on the basis of the information thus achieved whether the engine (10) to be controlled in accordance with an air conditioning load is under overload state or not, and engine load reducing control of reducing the load of the engine is carried out if it is judged that the engine is under overload state.
Description
Technical field
The present invention relates to the control break engine speed, make the engine-driven type air conditioning device and the control method thereof of carrying out operation of air conditioner by the refrigerant circulation of this engine-driven compressor discharge, and relate to the excess load control of engine.
Background technology
In the past, by the compressor of the motor driven outdoor unit that gas etc. is acted as a fuel, compression refrigerant also made the so-called engine-driven type air conditioning device of its circulation be familiar with by everybody.
With good grounds air conditioner load control break engine speed in this engine-driven type air conditioning device, the temperature that the refrigerant exit of outlet pressure, suction pressure and the heat exchanger of measuring compressor is arranged, ask the shaft power of compressor according to this measurement result, judge according to this shaft power whether engine is (for example Patent Document 1) of over burdening state.Afterwards, if judge it is overload state, then throttle expansion valve etc. avoids reducing engine life to reduce the load of engine.
[Patent Document 1] spy opens flat 6-137701 communique
Summary of the invention
But, when above-mentioned such shaft power according to compressor is calculated engine load, must consider the volume efficiency and the dynamic efficiency of compressor.But the volume efficiency of compressor and dynamic efficiency are not certain, by the difference that generations such as the rotary speed of compressor and refrigerant pressure can not be ignored, have the problem of the load that is difficult to calculate accurately engine.
Therefore, the object of the present invention is to provide and a kind ofly can judge correctly whether engine is in overload state, avoid the engine-driven type air conditioning device and the control method thereof of the overload state of engine rightly.
In order to address the above problem, engine-driven type air conditioning device of the present invention is according to air conditioner load control break engine speed, the refrigerant of being discharged by this engine-driven compressor is circulated between outdoor heat converter and indoor heat converter and carries out operation of air conditioner.It comprises: decision maker, its obtain described engine rotating speed, fuel adjusting valve opening, throttle valve opening all information or wherein any, judge according to the information that obtains whether the described engine according to air conditioner load control is in overload state; Control device, if it judges that described engine is in overload state, the engine load that then reduces the load of described engine reduces control.According to this invention, since obtain engine rotating speed, fuel adjusting valve opening, throttle valve opening all information or wherein any, judge according to the information that obtains whether the described engine according to air conditioner load control is in overload state, so can judge the load of engine, judge whether indirectly to compare with shaft power and can judge accurately whether engine is in overload state for the existing product of overload state according to compressor according to the current state of a control of engine.
In foregoing invention, has storage device, the rotating speed of its image conversion and storage engine, the fuel adjusting valve opening, all information of throttle valve opening or the torque value of any and described engine wherein, the voltage that igniting requires and at least one of excess air ratio, described decision maker also can be with reference to the information that is stored in the storage device, according to the described information that obtains, the torque value of specific described engine, the voltage that igniting requires and at least one of excess air ratio, according to the comparison of this particular value and predefined setting value, judge whether described engine is in overload state.
In foregoing invention, have storage device, its storage is according to all information of the rotating speed of engine, fuel adjusting valve opening, throttle valve opening or wherein any calculates at least one computing formula of the torque value of described engine, voltage that igniting requires and excess air ratio.Described decision maker also can use the computing formula that is stored in the storage device, according to the described information that obtains, the voltage that the torque value of specific described engine, igniting require and at least one of excess air ratio, according to the comparison of this particular value and predefined setting value, judge whether described engine is in overload state.
In foregoing invention, described control device is if judge that described engine is in overload state, preferably carry out at least one in the following adjusting, promptly in described outdoor heat converter and indoor heat converter, regulate the aperture of the expansion valve corresponding with the heat exchanger of bringing into play function as evaporimeter, adjusting is regulated the rotating speed of described engine or the aperture that adjusting is located at the by-passing valve of the bypass pipe between refrigerant high-voltage section and the refrigerant low voltage section as the rotary speed of the cooling fan of the heat exchange of condenser performance function in described outdoor heat converter and indoor heat converter.At this moment, described control device should change regulate lower limit with as the corresponding expansion valve of the heat exchanger of evaporimeter performance function the time according to air conditioner load, the higher limit the when lower limit the when higher limit when regulating the rotary speed as the cooling fan of the heat exchange of described condenser performance function, the described engine speed of adjusting or the aperture of regulating described by-passing valve.
The present invention, according to air conditioner load control break engine speed, the refrigerant of being discharged by this engine-driven compressor is circulated between outdoor heat converter and indoor heat converter and carry out in the control method of engine-driven type air conditioning device of operation of air conditioner, obtain the rotating speed of described engine, the fuel adjusting valve opening, all information of throttle valve opening or wherein any, judge according to the information that obtains whether the described engine according to air conditioner load control is in overload state, if judge that described engine is in overload state, the engine load that just reduces the load of described engine reduces control.According to this invention, since obtain engine rotating speed, fuel adjusting valve opening, throttle valve opening all information or wherein any, according to the information that obtains, whether judgement is in overload state according to the described engine of air conditioner load control, so can judge the load of engine according to the current state of a control of engine, judge whether indirectly to compare with shaft power, can judge accurately whether engine is in overload state for the existing product of overload state according to compressor.
The present invention since obtain engine rotating speed, fuel adjusting valve opening, throttle valve opening all information or wherein any, according to the information that obtains, whether judgement is in overload state according to the described engine of air conditioner load control, if judge that described engine is in overload state, the engine load that just reduces the load of engine reduces control, so can judge the load of engine according to the current state of a control of engine.Therefore, judge whether indirectly to compare, can judge accurately whether engine is in overload state, can suitably avoid the overload state of engine for the existing product of overload state with shaft power according to compressor.
Description of drawings
Fig. 1 is the figure of structure of the engine-driven type air conditioning device of expression present embodiment;
Fig. 2 represents the block diagram of control device structure;
Fig. 3 is the figure of database of descriptions;
Fig. 4 is that expression reduces the flow chart that engine load is handled.
The specific embodiment
Below, with reference to accompanying drawing in detail embodiments of the present invention are described in detail.
Fig. 1 is the figure of structure of the engine-driven type air conditioning device 100 of expression present embodiment.This engine-driven type air conditioning device 100 is to use an outdoor unit 1 and Duo Tai (for example two) indoor unit 2a, 2b the coolant piping of being made up of flue 3a and liquid line 3b (pipe arrangement between the unit) 3 to connect and compose.In addition, engine-driven type air conditioning device 100 comprises the control device 4 of the control driven air conditioner 100 that turns round and the operating portion 5 that carries out the operations such as running indication of this control device 4.
This operating portion 5 is the so-called remote controls that carry out the running of indoor unit 2a, 2b or stop, or carries out the remote control etc. of the affirmation of the various settings of these indoor units 2a, 2b and outdoor unit 1 and operating condition.Make the structure of the few replacement refrigerant R410a circulation of the refrigerant ability height, the pressure loss that in engine-driven type air conditioning device 100, make unit volume in present embodiment.
In outdoor unit 1, between refrigerant high-voltage section (the discharge side of compressor 11) and refrigerant low voltage section (holder 15 fronts in the illustrated example), be connected with bypass pipe 17, on this bypass pipe 17, be provided with by-passing valve (motor-driven valve) 18.By regulating the aperture of by-passing valve 18, can regulate by the return amount (the return amount of the suction side of compressor 11) of bypass pipe 17 from the refrigerant of compressor 11 discharges, can be adjusted in the circulation coolant quantity of outdoor unit 1 and indoor unit 2a, 2b circulation.
And then, in this outdoor unit 1, be provided with the liquid line 40 that is used for the liquid refrigerants that the pipe (liquid pipe) 19 in outdoor unit 1 side flows is suitably supplied to holder 15 fronts of the suction side that is located at compressor 11, on this liquid line 40, be provided with liquid valve (motor-driven valve) 41.This liquid valve 41 normally cuts out, and the refrigerant of discharging at compressor 11 surpasses temperature (for example is 115 ℃ etc. according to the kind of refrigerant) time of regulation to be opened, from the pipe 19 of outdoor unit 1 side the low refrigerant of temperature supply with holder 15 in face of example.Therefore, the temperature that is drawn into the gas coolant in the compressor 11 descends, and can prevent that the refrigerant of compressor 11 discharges is overheated.
In indoor unit 2a, 2b, connect and indoor heat converter 20a, 20b, the control of taking in the heat exchange of carrying out indoor room air and refrigerant that these indoor units 2a, 2b are installed flows to indoor expansion valve 21a, the 21b of the coolant quantity of each indoor unit 2a, 2b with each coolant piping.In above-mentioned indoor heat converter 20a, 20b, respectively in abutting connection with the indoor fan 22a, the 22b that dispose to these indoor heat converters 20a, 20b air-supply.
In the combustion chamber of the engine 10 of drive compression machine 11, supply with fuel and Air mixing gas by engine fuel supply device 31.This engine fuel supply device 31 disposes fuel shut off valve 33, zero adjuster 34, fuel control valve 35 and choke valve 36 in turn along fuel supplying tubing 32, and this choke valve 36 is connected with the above-mentioned combustion chamber of engine 10.Fuel shut off valve 33 constitutes the fuel shut off valve mechanism of locking type, and fuel shut off valve 33 complete shut-downs or standard-sized sheet implement to select not leak a state of closing and being communicated with of combustion gas.
Fig. 2 is the block diagram of the structure of expression control device 4.Control device 4 comprises: configuration part 47, and it is set running indication of engine 10 and compressor 11 etc.; EEPPOM (storage device) 42, the various settings of its storage engine-driven type air conditioning device 100 and control with program, control with data and database 50 (Fig. 3) etc.; CPU43, it is according to all with control such as program engine-driven type air conditioning device 100 of the control in the EEPPOM42; RAM44, its temporary transient store various kinds of data; Send acceptance division 45, it is carried out and the communicating by letter of operating portion 5; Interface (I/F) 46, it is used to launch the signal of each one that receives engine-driven type air conditioning device 100.
As long as this control device 4 is operation aforesaid operations portion 5, just can control engine 10, cross valve 12, outdoor expansion valve 14 and outdoor fan 16 in the outdoor unit 1 respectively, control indoor expansion valve 21a, 21b and indoor fan 22a, 22b among indoor unit 2a, the 2b simultaneously respectively.
Particularly, control device 4 is set these aircondition 100 cooling operations or heating running by switching cross valve 12.When soon cross valve 12 switches to cooling operation, refrigerant is mobile as dotted arrow, outdoor heat converter 13 is in condenser, and indoor heat converter 20a, 20b become the cooling operation state as evaporimeter performance function, and each indoor heat converter 20a, 20b make indoor refrigeration.And control device 4 is when switching to the heating side with cross valve 12, refrigerant is mobile as the solid line arrow, indoor heat converter 20a, 20b are in condenser, and outdoor heat converter 13 becomes the heating operating condition as evaporimeter performance function, and each indoor heat converter 20a, 20b make indoor heating.
The difference of the indoor temperature that this control device 4 is obtained according to the design temperature of setting with operating portion 5 with indoor temperature transmitter etc., control the aperture (fuel adjusting valve opening, throttle valve opening) of above-mentioned fuel control valve 35 and choke valve 36, the rotating speed of control break engine 10, in addition, according to the difference control outdoor expansion valve 14 of the refrigerant gateway temperature of heat exchanger 13,20a, 20b and the aperture of indoor expansion valve 21a, 21b.
In above-mentioned operation of air conditioner, control device 4 judges whether the engine 10 according to air conditioner load control is overload state, when being in overload state, carry out reduce engine load processing (minimizing of engine load is handled).Under this enforcement state, obtain the information (control information) of so-called current state of a control of engine 10 of engine speed, fuel adjusting valve opening, the throttle valve opening of expression engine 10, with reference to this information comparable data storehouse 50, judge whether engine 10 is overload state.Fig. 3 is the illustration of database 50.
The corresponding torque value that engine speed, fuel adjusting valve opening, throttle valve opening, engine 10 are arranged, the thermal efficiency of engine, the voltage that IG (igniting) requires, the flow and the λ (excess air ratio) of combustion gas of recording and narrating in database 50.Wherein, engine speed, fuel adjusting valve opening, throttle valve opening are the information that engine 10 can be measured in control, and voltage and λ that torque value, IG require are used to judge whether engine 10 is in the information of overload state.That is to say that if torque value is excessive, the durability of engine descends; If the voltage height that IG requires, then the coil life-span reduces; If λ value diminishes and detonation just takes place, causes engine damage, be to be used for what is called to determine the information of the high situation of engine load (load is determined information) in addition, whether the thermal efficiency of engine is to be used to judge that engine economizing when can turn round, with the information of the good velocity of rotation running of the thermal efficiency.And the flow of combustion gas is the control of gas demand and economizes the information that is suitable for using most in the time of turning round.
This database 50 is conduct load on engine for example, add 1,3,5,7,9,11, the torque of 13 (kgm), each torque is made the such fuel metering control valve opening of engine rotation with 1000 (rpm), throttle valve opening, under this state, obtain the fuel adjusting valve opening according to detecting to wait, throttle valve opening, the flow of combustion gas, torque value, the thermal efficiency of engine, the voltage that IG requires, the flow of combustion gas and λ are 1200 (rpm) to engine speed equally, 1400 (rpm) ... 2000 (rpm) also wait the fuel adjusting valve opening of obtaining under each torque according to detecting, throttle valve opening, the flow of combustion gas, the thermal efficiency of engine, the voltage that IG requires, the flow of combustion gas and λ.Make these by image conversion and detect data, be stored among the EEPROM42 of control device 4.The situation that is not limited to survey also can wait with simulation and obtain each value that the operational situation that makes such engine 10 is carried out the situation of various variations, makes above-mentioned database 50 according to these data.
25 Fig. 4 are that expression reduces the flow chart that engine load is handled.
At first, control device 4 is obtained present engine speed, fuel adjusting valve opening, throttle valve opening, with reference to the database 50 that is stored among the EEPROM42, obtain the voltage and the λ (step S1) of present torque value, IG requirement according to the engine speed that obtains, fuel adjusting valve opening, throttle valve opening.At this moment, when voltage that can not require from database 50 direct given torque values, IG and λ, by according to replenishing calculating, obtain the voltage and the λ of torque value, IG requirement with present engine speed, fuel adjusting valve opening, the nearest operational situation of throttle valve opening.
Secondly, control device 4 judges according to voltage and the λ that the torque value of obtaining, IG require whether engine 10 is over burdening state (step S2).Particularly, control device 4 judges whether little than predefined λ lower limit than predefined upper voltage limit value height, λ whether voltage that whether torque value require than predefined torque upper limit value height, IG, wherein each just judges that engine 10 is in the over burdening state as long as meet, if any one does not all meet, judge that then engine 10 is not at the over burdening state.
If judge that engine 10 is in over burdening state (step S2:YES), then control device 4 reduces the engine loading reduction control of engine loading.
Elaborate, control device 4 is at first judged the aperture whether consistent with predefined lower limit L1 (step S3) of the expansion valve (outdoor expansion valve 14 when indoor expansion valve 21a, 21b during cooling operation, heating running) of vaporizer side.Afterwards, with lower limit L1 when inconsistent when bigger than lower limit L1 (), control device 4 reduces an ormal weight (step S4) to expansion valve opening.At this, lower limit L 1 does not make the significantly lower limit of the expansion valve opening of decline of air-conditioning, by reduce expansion valve opening in the scope that air-conditioning is significantly descended, can reduce the internal circulating load of refrigerant, the load of reduction engine.
In the processing of step S5, control device 4 judges whether the velocity of rotation of fan (during cooling operation when outdoor fan 16, heating running indoor fan 22a, 22b) of condenser sides is consistent with predefined higher limit U2, and (than higher limit U2 hour) increases to ormal weight (step S6) with the velocity of rotation of fan when inconsistent.At this, higher limit U2 is set at upper limit velocity of rotation that fan allows or the upper limit velocity of rotation of noise in permissible range that fan produced.By the fan velocity of rotation of such increasing, can improve the load of condensing pressure, reduction engine 10
The velocity of rotation of fan strengthens back control device 4 by transferring to the processing of step S1, and engine 10 judgement once again at every turn is in overload condition, and the velocity of rotation of fan slowly strengthens.Like this, velocity of rotation that engine 10 is in overload condition, fan reach higher limit U2 (step S5: higher limit L2), control device 4 is just transferred to the processing of step S7 when judging.
In the processing of step S7, control device 4 judges whether the rotating speed of engine is consistent with predefined lower limit L3, with lower limit L3 when inconsistent when bigger than lower limit L3 (), regulates engine speed than ormal weight little (step S8).At this, lower limit L3 is set at the engine speed that air-conditioning does not significantly descend.By engine speed is descended, the compression ratio that can reduce compressor 11 is with the load with the minimizing engine.
After the rotating speed of engine 10 descended, control device 4 was by transferring to the processing of step S1, and engine 10 judgement once again at every turn is in overload condition, and the velocity of rotation of engine slowly descends.Like this, velocity of rotation that engine 10 is in overload condition, engine reach lower limit L3 (step S7: lower limit L3), control device 4 is just transferred to the processing of step S9 when judging.
In the processing of step S9, control device 4 judges whether the aperture of by-passing valve 18 is consistent with predefined higher limit L4, when inconsistent (than higher limit L4 hour), makes the opening ratio ormal weight big (step S10) of by-passing valve 18.At this, higher limit L4 is set at the aperture of the by-passing valve that air-conditioning significantly do not descend.By opening by-passing valve 18 like this, the compression ratio that can reduce compressor 11 is to reduce the load of engine.
After opening by-passing valve 18, control device 4 is by transferring to the processing of step S 1, and engine 10 judgement once again at every turn is in overload condition, and the aperture of by-passing valve 18 slowly strengthens.Like this, when judging that engine 10 is in overload condition, finally make the aperture of by-passing valve 18 increase to higher limit L4.
Like this, when engine 10 reaches overload condition, carry out the expansion valve opening adjusting of vaporizer side, the speed adjusting of condenser fan, the adjusting of engine speed, the adjusting of by-passing valve aperture by order, just can make engine 10 get back to common load condition in any stage from overload condition.But, even carry out in all stages, also judge when engine 10 is in overload condition, because there are the unusual situations of some generation such as error in the aperture of the rotating speed of the engine that consideration obtains, the aperture of fuel control valve, choke valve, control device 4 is preferably carried out the processing such as warning of placing regulation.
And above-mentioned lower limit L1, higher limit L2, lower limit L3 and higher limit L4 are set at expansion valve opening, the speed of condenser fan, engine speed, the by-passing valve aperture that air-conditioning is significantly descended, but if these are worth as fixed value, for example set if make above-mentioned lower limit L1 be fit to the big situation of air conditioner load, air conditioner load hour, even producing and making expansion valve opening is the value lower than lower limit L1, also can not make air-conditioning significantly descend, can reduce the situation of engine load etc., the regulated quantity of engine load is restricted.
Therefore, present embodiment control device 4 is controlled according to present air conditioner load change lower limit L1, higher limit L2, lower limit L3 and higher limit L4.Particularly, control device 4 is for example obtained the discharge temperature of indoor unit 2a, 2b according to temperature sensor 23a, 23b, and each value that changes L1～L4 according to discharge temperature is controlled.For example in when refrigeration, judge discharge temperature whether meet be less than or equal to 8 ℃, 8 ℃～12 ℃, 12 ℃～16 ℃, the arbitrary condition during more than or equal to 16 ℃, according to each value of each condition change L1～L4.Therefore can be in the scope that air-conditioning is significantly descended, extensively guarantee aperture, the condenser fan of evaporator expansion valve speed, engine speed, by-passing valve aperture respectively change width, promptly, can fully guarantee the regulated quantity of engine load, can make engine 10 avoid overload condition more effectively.
As above illustrated, in the engine-driven type air conditioning device 100 of present embodiment, by judging according to engine speed, fuel adjusting valve opening, by-passing valve aperture whether engine 10 is in overload condition, can judge engine load according to the present state of a control of engine, compare with judge the existing product whether engine is in overload condition indirectly according to the shaft power of compressor, can judge accurately whether engine 10 is in overload condition.
When engine is overload condition, be throttled to lower limit L1, the speed of condenser fan is increased to higher limit L2, engine speed is reduced to lower limit L3, the aperture of by-passing valve 18 is increased to higher limit L4 by aperture the vaporizer side expansion valve, reduce the load of engine in this order, generally can preferentially carry out the control of the aperture of the vaporizer side expansion valve when reducing engine load, carried out, the load of engine is reduced, and can make engine 10 avoid overload condition effectively.
And then each value owing to change above-mentioned L1～L4 in real time according to air conditioner load can make air-conditioning not descend significantly, guarantee that the regulated quantity of engine load is wide, can make engine 10 avoid overload condition more effectively.
More than one embodiment of the present invention is illustrated, but the invention is not restricted to this.For example, be not limited to represent in the above-described embodiment, respectively set value and the pipe arrangement formation, can suitably change without departing from the spirit and scope of the present invention.
For example in the present embodiment, to obtaining the whole of engine speed, fuel adjusting valve opening, throttle valve opening, judge that according to this information whether engine 10 is that the situation of overload state has been carried out illustration, but also can obtain engine speed, in the fuel adjusting valve opening, throttle valve opening any judge according to this information whether engine 10 is overload state.Because this situation also judges by the virtual condition (state of a control) of engine 10 whether engine 10 is overload state, compare with judge the existing product whether engine is in overload condition indirectly according to the shaft power of compressor, can judge accurately whether engine is in overload condition.
In the present embodiment, have engine speed though make, the fuel adjusting valve opening, throttle valve opening, the torque value of engine 10, the thermal efficiency of engine, the voltage that IG requires, the storage device of the flow of combustion gas and the storage of λ image conversion, but also can have following storage device, promptly, it omits the thermal efficiency of engine and the flow of combustion gas, and the artificial intelligence network of the information processing mechanism that memory by using imitation human brain structure is made, measure engine speed in advance by study, the fuel adjusting valve opening, throttle valve opening, torque value, the thermal efficiency of engine, the experimental data that voltage that IG requires and λ obtain is from engine speed, the fuel adjusting valve opening, throttle valve opening whole or any are calculated torque value, the formula of the voltage that IG requires and at least one among the λ.The use amount that can suppress EEPROM42 in view of the above.
In the present embodiment, when engine 10 is overload condition, by the expansion valve opening that order is carried out vaporizer side regulate, the speed of condenser fan is regulated, the situation of the adjusting of the adjusting of engine speed, by-passing valve aperture has been made illustration, but may not all carry out these engine loadings and reduce control, also can carry out one or more controls.
Claims (6)
1. engine-driven type air conditioning device, its according to air conditioner load control break engine speed, the refrigerant of being discharged by this engine-driven compressor is circulated carry out operation of air conditioner between outdoor heat converter and indoor heat converter, it is characterized in that, comprise: decision maker, its obtain described engine rotating speed, fuel adjusting valve opening, throttle valve opening all information or wherein any, judge according to the information that obtains whether the described engine according to air conditioner load control is in overload state; Control device, if it judges that described engine is in overload state, the engine load that then reduces the load of described engine reduces control.
2. engine-driven type air conditioning device as claimed in claim 1, it is characterized in that, has storage device, the rotating speed of its image conversion storage engine, the fuel adjusting valve opening, all information of throttle valve opening or the torque value of any and described engine wherein, the voltage that igniting requires and at least one of excess air ratio, described decision maker with reference to the information in the storage device of being stored in according to the described information that obtains, the torque value of specific described engine, the voltage that igniting requires and at least one of excess air ratio, according to the comparison of this particular value and predefined setting value, judge whether described engine is in overload state.
3. engine-driven type air conditioning device as claimed in claim 1, it is characterized in that, has storage device, its storage and according to the rotating speed of engine, the fuel adjusting valve opening, any calculates the torque value of described engine all information of throttle valve opening or its, the computing formula of the voltage that igniting requires and at least one of excess air ratio, described decision maker uses the computing formula that is stored in the storage device, according to the described information that obtains, the torque value of specific described engine, the voltage that igniting requires and at least one of excess air ratio, according to the comparison of this particular value and predefined setting value, judge whether described engine is in overload state.
4. as each described engine-driven type air conditioning device in the claim 1 to 3, it is characterized in that, described control device then carries out the adjusting of the aperture of expansion valve corresponding with the heat exchanger of bringing into play function as evaporimeter in described outdoor heat converter and the indoor heat converter if judge that described engine is in overload state, in described outdoor heat converter and indoor heat converter as the adjusting of the rotary speed of the cooling fan of the heat exchange of condenser performance function, the adjusting of described engine speed or be located at the refrigerant high-voltage section and the refrigerant low voltage section between the adjusting of aperture of by-passing valve of bypass pipe at least one.
5. engine-driven type air conditioning device as claimed in claim 4, it is characterized in that the higher limit when described control device changes lower limit when regulating as the corresponding expansion valve opening of the heat exchanger of evaporimeter performance function, the aperture adjusting of higher limit, lower limit when described engine speed is regulated or described by-passing valve when regulating as the rotary speed of the cooling fan of the heat exchange of described condenser performance function according to air conditioner load.
6. the control method of an engine-driven type air conditioning device, it is according to the variable control engine speed of air conditioner load, make from the refrigerant of discharging and between outdoor heat converter and indoor heat converter, circulate by this engine-driven compressor, carry out operation of air conditioner, it is characterized in that, obtain the rotating speed of described engine, the fuel adjusting valve opening, all information of throttle valve opening or wherein any, according to the information that obtains, whether judgement is in overload state according to the described engine of air conditioner load control, if judge that described engine is in overload state, the engine load that then reduces the load of described engine reduces control.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004217047 | 2004-07-26 | ||
| JP217047/04 | 2004-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727793A CN1727793A (en) | 2006-02-01 |
| CN100381762C true CN100381762C (en) | 2008-04-16 |
Family
ID=35427828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100659240A Active CN100381762C (en) | 2004-07-26 | 2005-04-15 | Engine driven air conditioner and control method therefor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1632735B1 (en) |
| KR (1) | KR100681973B1 (en) |
| CN (1) | CN100381762C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313340A (en) * | 2011-03-30 | 2012-01-11 | 上海本家空调系统有限公司 | Heat energy drive type air conditioner device and control method thereof |
| GB2513943B (en) * | 2013-05-03 | 2015-11-04 | Control Tech Ltd | Method and system for cooling a device |
| JP6401658B2 (en) * | 2015-05-08 | 2018-10-10 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN104819595B (en) * | 2015-05-12 | 2017-11-07 | 广东美的暖通设备有限公司 | refrigeration system, control method and device and air conditioner |
| CN112926868B (en) * | 2021-03-11 | 2024-04-09 | 郑州畅威物联网科技有限公司 | Voltage regulating equipment load state evaluation method, equipment and readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043555A (en) * | 1988-12-16 | 1990-07-04 | 三洋电机株式会社 | Heat pump system |
| JPH06137701A (en) * | 1992-10-21 | 1994-05-20 | Sanyo Electric Co Ltd | Operation control method for engine driven air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5454229A (en) * | 1994-05-18 | 1995-10-03 | Thermo King Corporation | Refrigeration unit control with shutdown evaluation and automatic restart |
| KR100235699B1 (en) * | 1996-12-06 | 1999-12-15 | 정몽규 | Car airconditioner |
| JP3973441B2 (en) * | 2002-02-08 | 2007-09-12 | 三洋電機株式会社 | Air conditioner |
-
2005
- 2005-04-15 CN CNB2005100659240A patent/CN100381762C/en active Active
- 2005-07-19 EP EP05015661.1A patent/EP1632735B1/en not_active Expired - Fee Related
- 2005-07-25 KR KR1020050067170A patent/KR100681973B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043555A (en) * | 1988-12-16 | 1990-07-04 | 三洋电机株式会社 | Heat pump system |
| JPH06137701A (en) * | 1992-10-21 | 1994-05-20 | Sanyo Electric Co Ltd | Operation control method for engine driven air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1632735A2 (en) | 2006-03-08 |
| KR20060046731A (en) | 2006-05-17 |
| EP1632735A3 (en) | 2014-04-02 |
| EP1632735B1 (en) | 2017-03-29 |
| CN1727793A (en) | 2006-02-01 |
| KR100681973B1 (en) | 2007-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4683725A (en) | Air conditioner for automotive vehicles capable of cooling intake air supplied to an internal combustion engine | |
| US7380407B2 (en) | Multi air conditioning system and method for operating the same | |
| CN105627615B (en) | The control method of air-conditioning system and air-conditioning system | |
| CN100381762C (en) | Engine driven air conditioner and control method therefor | |
| CN101896773A (en) | Control device for HVAC systems with inlet and outlet flow control devices | |
| CN105757798B (en) | The control method of air-conditioning system and air-conditioning system | |
| AU2014227781A1 (en) | System and apparatus for integrated HVACR and other energy efficiency and demand response | |
| CN101986050B (en) | Method for controlling air-conditioner in variable volume modular unit | |
| WO2020220581A1 (en) | Air conditioning system | |
| WO2021208523A1 (en) | Oil return control method for compressor of air conditioning system in refrigeration mode | |
| JP4622296B2 (en) | Combined power source heat pump air conditioner | |
| US9464838B2 (en) | Method of controlling heat pump system of electric vehicle | |
| CN112815571B (en) | Rotating speed regulation control method and system for gas heat pump engine driving compressor | |
| JP2005282986A (en) | Internal combustion engine-driven heat pump type air conditioner | |
| JP4557828B2 (en) | Engine-driven air conditioner and control method thereof | |
| JP2971082B2 (en) | Gas turbine equipment and operation method thereof | |
| KR100796838B1 (en) | Engine Controlling Device and Engine Driving Type Heat Pump Device Using the Same | |
| GB2288460A (en) | A combined heating, cooling and electrical power generating system | |
| CN113654217B (en) | Control method of air conditioner | |
| JP4056286B2 (en) | Control device for engine drive device | |
| CN212278706U (en) | Constant temperature dehumidification refrigerating plant | |
| Westphalen et al. | Energy Efficient Rooftop Air-Conditioner | |
| CN115854542A (en) | Air conditioner and fresh air control method of air conditioner | |
| CN116399015A (en) | Control method for one-to-many air conditioning system and one-to-many air conditioning system | |
| JPS6342185B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |