CN104879966A - Frequency-variable air conditioner and control method thereof - Google Patents
Frequency-variable air conditioner and control method thereof Download PDFInfo
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- CN104879966A CN104879966A CN201510214552.7A CN201510214552A CN104879966A CN 104879966 A CN104879966 A CN 104879966A CN 201510214552 A CN201510214552 A CN 201510214552A CN 104879966 A CN104879966 A CN 104879966A
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a frequency-variable air conditioner. The frequency-variable air conditioner comprises a frequency-variable compressor, an oil separator, a condenser, an expansion valve and an evaporator which are connected sequentially to form a loop. The frequency-variable air conditioner further comprises an electric check valve, one end of the electric check valve is connected with the oil separator, the other end of the electric check valve is connected with the frequency-variable compressor and the evaporator, and the electric check valve is used for controlling a switch of an oil return passage between the oil separator and the frequency-variable compressor according to running frequency of the frequency-variable compressor. The invention further provides a control method thereof. According to the control method, turning-on and turning-off of the electric check valve are controlled according to the running frequency of the frequency-variable compressor. The frequency-variable air conditioner and the control method thereof have the advantages that the amount of oil return can be increased when the frequency-variable compressor runs at low frequency, and air conditioning energy efficiency ratio of the frequency-variable air conditioner can be increased when the frequency-variable compressor runs at high frequency.
Description
Technical field
The present invention relates to home appliance technical field, particularly relate to a kind of transducer air conditioning and control method thereof.
Background technology
Transducer air conditioning is on the architecture basics of common air-conditioning device, selected frequency-changeable compressor, adds frequency-changing control system, can the running frequency of controlling and adjustment frequency-changeable compressor, makes it to be in best rotary regimes all the time, thus improves Energy Efficiency Ratio.
Frequency-changeable compressor is by the process of refrigerant compression, and inner each moving component lubrication needs to use lubricating oil, otherwise frequency-changeable compressor can because of serious wearing and tearing and overheated and damage.In prior art, for solving air-conditioning oil return difficulty when low-frequency operation, usually increase an oil eliminator at frequency-changeable compressor blast pipe place, after the parts of lubricating oil that the cold-producing medium of discharging from frequency-changeable compressor exhaust outlet carries is separated from cold-producing medium, flow in frequency-changeable compressor.But oil return is out of question when air-conditioner high frequency can be caused like this to run, but can cause energy loss, reduce air-conditioning Energy Efficiency Ratio.
Therefore, recirculating oil quantity when how to increase transducer air conditioning compressor low-frequency operation and improve air-conditioning Energy Efficiency Ratio when transducer air conditioning compressor high frequency runs and become problem demanding prompt solution.
Summary of the invention
The defect that when recirculating oil quantity compressor high frequency that is low and transducer air conditioning runs during compressor low-frequency operation for transducer air conditioning in prior art, air-conditioning Energy Efficiency Ratio is low, the invention provides a kind of transducer air conditioning and control method thereof.
First aspect, the invention provides a kind of transducer air conditioning, comprising: connect successively and the frequency-changeable compressor in formation loop, oil eliminator, condenser, expansion valve and evaporimeter, this air-conditioner also comprises: electric check valve;
One end of described electric check valve is connected with described oil eliminator, and the other end of described electric check valve is connected respectively with described frequency-changeable compressor and described evaporimeter;
Described electric check valve, for controlling the switch of the drainback passage between described oil eliminator and described frequency-changeable compressor according to the running frequency of described frequency-changeable compressor.
Preferably, exhaust gas temperature sensor, high-voltage switch gear and the first filter are installed successively between described frequency-changeable compressor and described oil eliminator.
Preferably, between described condenser and described expansion valve, the second filter is installed.
Preferably, between described electric check valve and described frequency-changeable compressor, low tension switch is installed.
Second aspect, the invention provides a kind of control method of transducer air conditioning, the method comprises:
When transducer air conditioning energising runs, detect the running frequency of the frequency-changeable compressor of described transducer air conditioning;
Judge whether the running frequency of described frequency-changeable compressor is less than preset operating frequency;
If the running frequency of described frequency-changeable compressor is less than described preset operating frequency, then the electric check valve controlling described transducer air conditioning is opened; If the running frequency of described frequency-changeable compressor is more than or equal to preset operating frequency, then the electric check valve controlling described transducer air conditioning cuts out.
Preferably, before the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection, the method also comprises:
Judge whether the energising of described transducer air conditioning reaches the first Preset Time running time, if so, then performs the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection.
Preferably, the method also comprises:
Every the second Preset Time, perform the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection.
The third aspect, the invention provides a kind of control system of transducer air conditioning, and this system comprises:
Detecting unit, for when transducer air conditioning energising runs, detects the running frequency of the frequency-changeable compressor of described transducer air conditioning;
First judging unit, for judging whether the running frequency of described frequency-changeable compressor is less than preset operating frequency;
Control unit, for when the running frequency of described frequency-changeable compressor is less than described preset operating frequency, the electric check valve controlling described transducer air conditioning is opened; When the running frequency of described frequency-changeable compressor is more than or equal to preset operating frequency, the electric check valve controlling described transducer air conditioning cuts out.
Preferably, described system also comprises: the second judging unit, for judging whether the energising of described transducer air conditioning reaches the first Preset Time running time, when the energising of described transducer air conditioning reaches the first Preset Time running time, described detecting unit performs the step of the running frequency of the frequency-changeable compressor detecting described transducer air conditioning.
Preferably, described system also comprises: timing unit, and for timing, every the second Preset Time, described detecting unit performs the step of the running frequency of the frequency-changeable compressor detecting described transducer air conditioning.
As shown from the above technical solution, the invention provides a kind of transducer air conditioning and control method thereof, by arranging electric check valve on the drainback passage of oil eliminator and frequency-changeable compressor, determine whether to need the lubricating oil in the steam of being discharged by frequency-changeable compressor to be separated according to the running frequency of frequency-changeable compressor, thus recirculating oil quantity when effectively increasing transducer air conditioning compressor low-frequency operation and improve air-conditioning Energy Efficiency Ratio when transducer air conditioning compressor high frequency runs.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these figure.
Fig. 1 is the structural representation of a kind of transducer air conditioning that one embodiment of the invention provides;
Fig. 2 is the schematic flow sheet of the control method of a kind of transducer air conditioning that one embodiment of the invention provides;
Fig. 3 is the schematic flow sheet of the control method of a kind of transducer air conditioning that another embodiment of the present invention provides;
Fig. 4 is the structural representation of the control system of a kind of transducer air conditioning that another embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, be the structural representation of a kind of transducer air conditioning that one embodiment of the invention provides, this transducer air conditioning comprises: connect successively and the frequency-changeable compressor 1 in formation loop, oil eliminator 2, condenser 3, expansion valve 4 and evaporimeter 5.
In the present embodiment, this air-conditioner also comprises: electric check valve 6.As shown in Figure 1, one end of described electric check valve 6 is connected with described oil eliminator 2, and the other end of described electric check valve is connected respectively with described frequency-changeable compressor 1 and described evaporimeter 5.
Described electric check valve 6, for controlling the switch of the drainback passage between described oil eliminator 2 and described frequency-changeable compressor 1 according to the running frequency of described frequency-changeable compressor.
Specifically, the oil return operation principle that transducer air conditioning shown in Fig. 1 is in refrigeration mode is as follows: the gaseous refrigerant of the HTHP of discharging from the blast pipe 1a of compressor 1 carries vaporific lubricating oil and enters oil eliminator 2, by the centrifugation of oil eliminator 2, there is the bottom of oil eliminator 2 in the lubricating oil separated, the cold-producing medium separated is through condenser 3, evaporimeter 5 delivered to by expansion valve 4, the high pressure low temperature liquid that evaporimeter 5 receives condenser 3 controls the cold-producing medium of the low-pressure low-temperature liquid state after throttling through expansion valve 4, the cold-producing medium flash evapn of low-pressure low-temperature liquid state changes steam into and absorbs the heat of cooled medium, by fan, cold air is discharged.
And when the running frequency of transducer air conditioning compressor 1 is less than preset frequency, open electric check valve 6, the lubricating oil in the steam of being discharged by oil eliminator 2 pairs of compressors is separated, thus is got back in compressor 1 by drainback passage.When the running frequency of frequency converting air-conditioner compressor 1 is more than or equal to preset frequency, the recirculating oil quantity of transducer air conditioning is large, close electric check valve 6, namely the lubricating oil in the steam of compressor discharge is not separated, directly delivers to evaporimeter by condenser 3, expansion valve 4 and be back to frequency-changeable compressor 1.So, recirculating oil quantity when effectively can increase transducer air conditioning compressor low-frequency operation and improve air-conditioning Energy Efficiency Ratio when transducer air conditioning compressor high frequency runs.
In the present embodiment, as shown in Figure 1, between the exhaust outlet 1a of described frequency-changeable compressor 1 and described oil eliminator 2, exhaust gas temperature sensor 9, high-voltage switch gear 7 and the first filter 10 are installed successively.Wherein, exhaust gas temperature sensor 9, for detecting the temperature of the gas of frequency-changeable compressor 1 discharge, if when temperature is higher than the scope allowed, then controls frequency-changeable compressor 1 and quits work; High-voltage switch gear 7 is for detecting the pressure at expulsion of frequency-changeable compressor 1, if pressure at expulsion is greater than high pressure preset value, then high-voltage switch gear 7 is closed, and quits work to make frequency-changeable compressor 1; First filter 10 is for removing the impurity in gaseous refrigerant and mist lubrication oil.
In the present embodiment, the second filter 11 is installed between described condenser 3 and described expansion valve 4.Second filter 11 is for removing the impurity in the cold-producing medium of low-pressure low-temperature liquid state.
In the present embodiment, between described electric check valve 6 and the air inlet 1b of described frequency-changeable compressor 1, low tension switch 8 is installed.Low tension switch 8 is for detecting the back pressure of frequency-changeable compressor 1, if back pressure is less than low pressure preset value, then low tension switch 7 is closed, and quits work to make frequency-changeable compressor 1.
As shown in Figure 2, the schematic flow sheet of the control method of a kind of transducer air conditioning provided for another embodiment of the present invention, the method comprises the steps:
S1: when transducer air conditioning energising runs, detect the running frequency of the frequency-changeable compressor of described transducer air conditioning.
S2: judge whether the running frequency of described frequency-changeable compressor is less than preset operating frequency.
In this step, preset operating frequency is arranged according to the actual power of inverter air conditioner, and such as, for the air-conditioning of 5, when the running frequency of compressor 1 is 60HZ, oil return effect is best, therefore preset operating frequency can be set to 60HZ.
S3: if the running frequency of described frequency-changeable compressor is less than described preset operating frequency, then the electric check valve controlling described transducer air conditioning is opened; If the running frequency of described frequency-changeable compressor is more than or equal to preset operating frequency, then the electric check valve controlling described transducer air conditioning cuts out.
Specifically, the running frequency of frequency-changeable compressor is higher, and refrigerant system capacity is larger, and recirculating oil quantity is larger; Otherwise the running frequency of frequency-changeable compressor is lower, refrigeration system cooling system amount is less, and recirculating oil quantity is less.Then when the running frequency of frequency-changeable compressor is less than preset operating frequency, open electric check valve, the lubricating oil bottom oil eliminator is got back in compressor, increases recirculating oil quantity; And when the running frequency of frequency converting air-conditioner compressor is more than or equal to preset operating frequency, the recirculating oil quantity of transducer air conditioning is large, then close electric check valve.
In this enforcement, before the running frequency of the frequency-changeable compressor of the described transducer air conditioning of the detection in step S1, the method also comprises the steps:
Judge whether the energising of described transducer air conditioning reaches the first Preset Time running time, if so, then continue the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection performing step S1.
Specifically, when transducer air conditioning has just started energising operation, because running frequency is also unstable, then the running frequency detecting compressor is not needed to control the opening and closing of electric check valve.When transducer air conditioning energising operation reaches certain hour, then start the running frequency detecting transducer air conditioning compressor.
In the present embodiment, the method also comprises the steps:
Every the second Preset Time, perform the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection of step S1.
In order to be illustrated more clearly in technical scheme of the present invention, below by one more specifically embodiment the control method of transducer air conditioning is described, as shown in Figure 3, the method comprises the steps:
S10: judge whether the energising of transducer air conditioning is greater than the first Preset Time running time, if so, then goes to step S20, otherwise goes to step S10.
S20: the running frequency detecting the frequency-changeable compressor of described transducer air conditioning.
S30: judge whether the running frequency of described frequency-changeable compressor is less than preset operating frequency, if so, then goes to step S40, otherwise goes to step S50.
S40: the electric check valve controlling described transducer air conditioning is opened, and goes to step S60.
S50: the electric check valve controlling described transducer air conditioning cuts out, and goes to step S60.
S60: judge whether to reach the second Preset Time, if so, then go to step S20, otherwise go to step S60.
Present embodiments provide a kind of control method of transducer air conditioning, determine whether to need the lubricating oil in the steam of being discharged by frequency-changeable compressor to be separated according to the running frequency of frequency-changeable compressor, thus recirculating oil quantity when effectively increasing transducer air conditioning compressor low-frequency operation and improve air-conditioning Energy Efficiency Ratio when transducer air conditioning compressor high frequency runs.
As shown in Figure 4, another embodiment of the present invention provides a kind of structural representation of control system of transducer air conditioning, and this system comprises: detecting unit 401, first judging unit 402 and control unit 403.
Wherein, detecting unit 401, for when transducer air conditioning energising runs, detects the running frequency of the frequency-changeable compressor of described transducer air conditioning.First judging unit 402, for judging whether the running frequency of described frequency-changeable compressor is less than preset operating frequency.Control unit 403, for when the running frequency of described frequency-changeable compressor is less than described preset operating frequency, the electric check valve controlling described transducer air conditioning is opened; When the running frequency of described frequency-changeable compressor is more than or equal to preset operating frequency, the electric check valve controlling described transducer air conditioning cuts out.
In the present embodiment, described system also comprises: the second judging unit, for judging whether the energising of described transducer air conditioning reaches the first Preset Time running time.
Particularly, when the second judging unit judges whether the energising of described transducer air conditioning reaches the first Preset Time running time, detecting unit 401 performs the step of the running frequency of the frequency-changeable compressor detecting described transducer air conditioning.
In the present embodiment, described system also comprises: timing unit, and for timing, every the second Preset Time, described detecting unit 401 performs the step of the running frequency of the frequency-changeable compressor detecting described transducer air conditioning.
For system embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that; It still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a transducer air conditioning, comprising: connect successively and the frequency-changeable compressor in formation loop, oil eliminator, condenser, expansion valve and evaporimeter, it is characterized in that, this air-conditioner also comprises: electric check valve;
One end of described electric check valve is connected with described oil eliminator, and the other end of described electric check valve is connected respectively with described frequency-changeable compressor and described evaporimeter;
Described electric check valve, for controlling the switch of the drainback passage between described oil eliminator and described frequency-changeable compressor according to the running frequency of described frequency-changeable compressor.
2. transducer air conditioning according to claim 1, is characterized in that, is provided with exhaust gas temperature sensor, high-voltage switch gear and the first filter between described frequency-changeable compressor and described oil eliminator successively.
3. transducer air conditioning according to claim 1, is characterized in that, is provided with the second filter between described condenser and described expansion valve.
4. transducer air conditioning according to claim 1, is characterized in that, is provided with low tension switch between described electric check valve and described frequency-changeable compressor.
5. a control method for transducer air conditioning, is characterized in that, the method comprises:
When transducer air conditioning energising runs, detect the running frequency of the frequency-changeable compressor of described transducer air conditioning;
Judge whether the running frequency of described frequency-changeable compressor is less than preset operating frequency;
If the running frequency of described frequency-changeable compressor is less than described preset operating frequency, then the electric check valve controlling described transducer air conditioning is opened; If the running frequency of described frequency-changeable compressor is more than or equal to preset operating frequency, then the electric check valve controlling described transducer air conditioning cuts out.
6. the control method of transducer air conditioning according to claim 5, is characterized in that, before the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection, the method also comprises:
Judge whether the energising of described transducer air conditioning reaches the first Preset Time running time, if so, then performs the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection.
7. the control method of transducer air conditioning according to claim 5, is characterized in that, the method also comprises:
Every the second Preset Time, perform the step of the running frequency of the frequency-changeable compressor of the described transducer air conditioning of described detection.
8. a control system for transducer air conditioning, is characterized in that, this system comprises:
Detecting unit, for when transducer air conditioning energising runs, detects the running frequency of the frequency-changeable compressor of described transducer air conditioning;
First judging unit, for judging whether the running frequency of described frequency-changeable compressor is less than preset operating frequency;
Control unit, for when the running frequency of described frequency-changeable compressor is less than described preset operating frequency, the electric check valve controlling described transducer air conditioning is opened; When the running frequency of described frequency-changeable compressor is more than or equal to preset operating frequency, the electric check valve controlling described transducer air conditioning cuts out.
9. system according to claim 8, it is characterized in that, described system also comprises: the second judging unit, for judging whether the energising of described transducer air conditioning reaches the first Preset Time running time, when the energising of described transducer air conditioning reaches the first Preset Time running time, described detecting unit performs the step of the running frequency of the frequency-changeable compressor detecting described transducer air conditioning.
10. system according to claim 8, is characterized in that, described system also comprises: timing unit, and for timing, every the second Preset Time, described detecting unit performs the step of the running frequency of the frequency-changeable compressor detecting described transducer air conditioning.
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| CN201510214552.7A CN104879966A (en) | 2015-04-29 | 2015-04-29 | Frequency-variable air conditioner and control method thereof |
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| CN107339836A (en) * | 2017-06-13 | 2017-11-10 | 珠海格力电器股份有限公司 | Frequency converter unit and oil return control method and device thereof |
| CN107339836B (en) * | 2017-06-13 | 2019-09-24 | 珠海格力电器股份有限公司 | Frequency converter unit and oil return control method and device thereof |
| WO2020052234A1 (en) * | 2018-09-11 | 2020-03-19 | 青岛海信日立空调系统有限公司 | Compressor oil return control method and apparatus |
| CN110657550A (en) * | 2019-10-21 | 2020-01-07 | 宁波奥克斯电气股份有限公司 | A kind of compressor oil return control method, device and air conditioner |
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