CN105402961A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN105402961A CN105402961A CN201510963415.3A CN201510963415A CN105402961A CN 105402961 A CN105402961 A CN 105402961A CN 201510963415 A CN201510963415 A CN 201510963415A CN 105402961 A CN105402961 A CN 105402961A
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- control module
- temperature
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- expansion valve
- air
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a control method thereof. The air conditioner comprises a refrigerant flow pipeline, an electronic control module, a heat radiating module and a control module, wherein the refrigerant flow pipeline is formed by sequentially connecting a compressor, a condenser, a throttling element and an evaporator; the heat radiating module comprises a refrigerant pipe and a first electronic expansion valve which are connected in series, and the first electronic expansion valve is connected with the inlet end of the refrigerant pipe; the heat radiating module is connected in parallel to the refrigerant flow pipeline arranged between the condenser and the evaporator and provided with the throttling element and is close to the electronic control module, so that the heat of the electronic control module is radiated by virtue of a refrigerant flowing through the refrigerant pipe; and the control module is electrically connected with the first electronic expansion valve and is used for acquiring the temperature value of the electronic control module and regulating the aperture of the first electronic expansion valve according to the temperature value, so that the temperature of the electronic control module is kept within the preset range. By using the air conditioner provided by the invention, the temperature of the electronic control module can be kept within the preset range, so that system refrigerating capacity waste caused by excessively cooling the electronic control module is avoided.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of air-conditioner and control method thereof.
Background technology
At present, convertible frequency air-conditioner is commercially more and more universal, comprises some worst hot case areas, the utilization of convertible frequency air-conditioner is also more and more extensive, but under high-temperature refrigeration operating mode, the temperature of convertible frequency air-conditioner electronic control module is also very high, and the heat dissipation problem how solving electronic control module is extremely important.The main flow way that present stage addresses this problem mainly contains both direction, and one is the fin infinitely strengthening electronic control module, and two is utilize refrigerant pipe heat dissipation technology to dispel the heat to electronic control module.But the first way radiating effect is not very desirable, therefore, refrigerant pipe heat dissipation technology is widely used.But most variations is instantly all directly be connected in refrigerant flow by refrigerant pipe radiating module, continuously to electronic control module conveying cold, even if electronic control module is reduced to safe temperature, still conveying cold is continued, and the conveying capacity of cold can not reduce, the cold of system is therefore caused to waste.
Summary of the invention
In order to solve the problems of the technologies described above one of at least, one object of the present invention is to provide one can effectively to electronic control module radiating and cooling, and the air-conditioner that the temperature of electronic control module can be controlled in preset range.
Another object of the present invention is the control method providing a kind of above-mentioned air-conditioner.
To achieve these goals, the embodiment of first aspect present invention provides a kind of air-conditioner, comprises and to be connected successively the refrigerant flow formed by compressor, condenser, restricting element and evaporimeter, also comprise: electronic control module; Radiating module, described radiating module comprises refrigerant pipe and first electric expansion valve of serial connection, described first electric expansion valve is connected with the arrival end of described refrigerant pipe, in refrigerant flow between the described radiating module parallel connection described condenser of access and described evaporimeter, and be attempted by the refrigerant flow being provided with described restricting element between described condenser and described evaporimeter, described radiating module, near described electronic control module, is the heat radiation of described electronic control module to utilize the refrigerant flowing through described refrigerant pipe; And control module, be electrically connected with described first electric expansion valve, for obtaining the temperature value of described electronic control module, and regulate the aperture of described first electric expansion valve according to described temperature value, maintaining in preset range to make the temperature of described electronic control module.
The air-conditioner that the embodiment of first aspect present invention provides, by access refrigerant pipe in parallel and the first electric expansion valve in the refrigerant flow that is provided with restricting element between condenser with evaporimeter, the refrigerant then with lower temperature can flow in refrigerant pipe, cold flowed to the electronic control module near refrigerant pipe by refrigerant pipe, make electronic control module accelerate heat radiation; And control module can regulate the aperture of the first electric expansion valve according to the temperature of electronic control module, and then regulate the coolant quantity entering refrigerant pipe, refrigerant pipe is made to flow to the cold of electronic control module adjusted, and then control the radiating rate of electronic control module, so that the temperature of electronic control module is maintained in default safe temperature range, and can not fall too low, thus avoid to electronic control module lower the temperature excessively cause cold waste.
Specifically, the electronic control module of existing air-conditioner, fin radiating effect is undesirable, and refrigerant pipe heat dissipation technology can cause system cold to be wasted; And air-conditioner provided by the invention, be intended to the temperature of electronic control module be controlled, in the safe temperature range preset, its safe operation can be ensured like this, energy consumption can not be caused again to waste.Particularly, by in the refrigerant flow of connecting system in parallel for refrigerant pipe, and to connect the first electric expansion valve at the arrival end of refrigerant pipe, the coolant quantity entered in refrigerant pipe effectively can be controlled by the aperture controlling the first electric expansion valve, and then carry cold according to the actual temperature of electronic control module, thus both ensure that the safe operation of electronic control module, turn avoid the waste to system cold.More specifically, after refrigerant flows out from condenser, there is lower temperature, a part enters in the refrigerant flow of system and enters evaporimeter through restricting element, a part enters radiating module, carries cold by refrigerant pipe to electronic control module, makes electronic control module accelerate heat radiation, and refrigerant pipe to electronic control module conveying cold number directly related with the coolant quantity flowing through refrigerant pipe, therefore control module can effectively regulate the coolant quantity entering refrigerant pipe by the aperture of adjustment first electric expansion valve, and then regulate refrigerant pipe to flow to the cold of electronic control module, control the radiating rate of electronic control module, and the foundation regulated is the actual temperature of electronic control module, thus can the temperature of electronic control module be maintained in default safe temperature range, make electronic control module temperature-constant operation in safe temperature range, and can not fall too low, namely the thermostatically controlled object of electronic control module is realized, as for control module, it can be the independent control module for controlling the first electric expansion valve, also can be integrated in the control module of air-conditioner.
It should be noted that, cold refers to the capacity of water of the absorption heat that cryogenic object has, and the temperature of object is lower, and the ability absorbing heat is larger, then the cold had is more.
In addition, the air-conditioner in above-described embodiment provided by the invention can also have following additional technical feature:
In technique scheme, described control module comprises: detecting unit, for detecting the temperature of described electronic control module, and sends temperature value; And performance element, being connected with described semiconductor cooler with described detecting unit, for receiving described temperature value, and regulating the aperture of described first electric expansion valve according to described temperature value.
Control module comprises detecting unit and performance element, detecting unit accurately detects the temperature of electronic control module, as regulation and control foundation, performance element is according to the aperture of regulation and control according to corresponding adjustment first electric expansion valve, the cold that refrigerant pipe is exported and the actual needs of electronic control module match, thus the temperature of electronic control module is maintained in default temperature range, realize thermostatically controlled object.Particularly, detecting unit can be temperature sensor, infrared sensor equitemperature checkout gear.
In above-mentioned arbitrary technical scheme, described air-conditioner also comprises: high temperature protection module, for detecting the temperature of described electronic control module in real time, and when the temperature of described electronic control module meets or exceeds set temperature value, controls the shutdown of described air-conditioner.
When temperature due to electronic control module is too high; electric control element may be burned soon; therefore by arranging high temperature protection module; the temperature of electronic control module is monitored in real time; under any circumstance, as long as the temperature of electronic control module meets or exceeds set temperature value, air-conditioner is directly shut down protection; to avoid electric control element to be burned, thus effective superheat protecting function is served to air-conditioner.
In above-mentioned arbitrary technical scheme, described air-conditioner also comprises: the second electric expansion valve, be arranged in the refrigerant flow be in parallel with described radiating module, and be electrically connected with described control module, described control module controls the aperture of described first electric expansion valve and described second electric expansion valve, to regulate the temperature of described electronic control module.
Second electric expansion valve is set in the refrigerant flow in parallel with radiating module, then can control to enter the coolant quantity in system refrigerant flow by the aperture of control second electric expansion valve, indirectly regulating action can be played to the coolant quantity entered in refrigerant pipe, therefore can be distributed more accurately with the refrigerant entered in system refrigerant flow entering refrigerant pipe by the aperture of Comprehensive Control two electric expansion valves, more reasonably to distribute system cold and to utilize, thus reduce further the waste to system cold.
In above-mentioned arbitrary technical scheme, described air-conditioner also comprises: blower fan, be electrically connected with described control module, described control module controls described blower fan and rotates or stop, and on described electronic control module and the described refrigerant pipe air-out direction that is positioned at described blower fan or air draught direction.
Utilize blower fan to accelerate air flowing, the radiating rate of electronic control module can be improved further; Utilize control module to control rotation or the stopping of blower fan, the radiating rate of electronic control module can be regulated to a certain extent, concrete adjustment process is determined according to the temperature of electronic control module, like this, to control the coolant quantity in refrigerant pipe, be auxiliary to control blower fan, realized the temperature-constant operation of electronic control module by Comprehensive Control, better effects if, reliability is higher.
In above-mentioned arbitrary technical scheme, described air-conditioner is transducer air conditioning, and described electronic control module is frequency conversion electrical control module.
Compared to air-conditioner with fixed frequency, the heat that the frequency conversion electrical control module of transducer air conditioning produces is more, more easily there is superheating phenomenon, thus the aforementioned radiating module of frequency conversion electrical control module installation and the control module that are transducer air conditioning are necessary, significantly can promote the heat-sinking capability of transducer air conditioning, make its operation lasting stability more under worst hot case, and then expand the market competitiveness of transducer air conditioning.
The embodiment of second aspect present invention provides a kind of control method of air-conditioner, comprising as the air-conditioner in above-mentioned first aspect embodiment for controlling: start step: control the first electric expansion valve after start and run the first preset duration with default aperture; Detecting step: the temperature detecting electronic control module, obtains temperature value: regulation and control step: the aperture regulating described first electric expansion valve according to described temperature value, to regulate the temperature of described electronic control module; Recheck step: interval second preset duration, returns execution detecting step.
The control method of the air-conditioner that the embodiment of second aspect present invention provides, can ensure electronic control module safe operation in the temperature range preset, thus avoid the waste to system cold, reliability is high.Particularly, due in the process of start, the workload of electronic control module is larger, easily rise to higher temperature in the short period of time, therefore the first electric expansion valve is first allowed to run a period of time with default aperture after start, default aperture is relatively large aperture, to ensure that refrigerant pipe efficiently can export cold, thus avoids electronic control module temperature in start process to rise to too high; And in the process of air-conditioner even running, then according to the observed temperature of electronic control module, specifically regulate the aperture of the first electric expansion valve, or increase, or reduce, or remain unchanged, to regulate the coolant quantity entering refrigerant pipe, and then the cold regulating refrigerant pipe to export, regulate the radiating rate of electronic control module, make the temperature of electronic control module maintain in default safe temperature range, so both ensure that the safe operation of electronic control module, turn avoid the waste to system cold.
In addition, the control method of the air-conditioner in above-described embodiment provided by the invention can also have following additional technical feature:
In technique scheme, described regulation and control step specifically comprises: judge whether described temperature value is less than the first preset temperature, and when described temperature value is not less than described first preset temperature, the aperture controlling described first electric expansion valve is described default aperture; When described temperature value is less than described first preset temperature, judge whether described temperature value is less than the second preset temperature, when described temperature value is not less than described second preset temperature, the aperture controlling described first electric expansion valve remains unchanged; When described temperature value is less than described second preset temperature, the aperture controlling described first electric expansion valve reduces setting value; Wherein, described first preset temperature is greater than described second preset temperature.
First preset temperature is the higher limit of electronic control module safe operation, and the second preset temperature is the lower limit of electronic control module safe operation.Due to electronic control module be in higher temperature time, exist and burn out the danger of electric elements, consequence is comparatively serious, and when being in lower temperature, then the problem of just energy consumption waste, can not have influence on the normal operation of air-conditioner, affect relatively little; Therefore first judge whether the temperature of electronic control module is less than the first preset temperature, in other words, whether higher than safe range, judge whether electronic control module is in high risk state, to make corresponding control in time, ensure the normal operation of air-conditioner; Ensureing under the prerequisite that air-conditioner normally runs, then judging whether observed temperature is less than the second preset temperature, in other words, whether lower than safe range, then making corresponding control, to avoid the waste of energy consumption; Like this, control procedure is made a distinction between the important and the lesser one, rationally reliably.As for concrete adjustment process, when the temperature value of electronic control module is too high, during beyond preset range, need in refrigerant pipe, to enter more refrigerant, then the aperture of the first electric expansion valve should be comparatively large, is specially default aperture, is certainly not limited to default aperture, to improve the radiating rate of electronic control module, its temperature is reduced in preset range gradually; If the temperature value of electronic control module is in preset range, namely the radiating rate of electronic control module is suitable, and thus the aperture of the first electric expansion valve remains unchanged; If the temperature value of electronic control module is lower than preset range, then need the aperture of reduction first electric expansion valve, specifically can reduce the setting value of fixing, be certainly not limited to the setting value that this is fixing, suitably to reduce the radiating rate of electronic control module, its temperature is gone up gradually in preset range.
In above-mentioned arbitrary technical scheme, the control method of described air-conditioner also comprises: high temperature protection step: the temperature detecting described electronic control module after start in real time, and when the temperature of described electronic control module meets or exceeds the 3rd preset temperature, control the shutdown of described air-conditioner; Wherein said 3rd preset temperature is greater than described first preset temperature.
3rd preset temperature is the higher limit that electronic control module can be run, and when the temperature of electronic control module is increased to this temperature, the possibility that electric control element burns out is larger.Therefore the setting of high temperature protection step; make air-conditioner when the temperature of electronic control module is increased to this temperature; can directly shut down to protect electronic control module; the situation avoiding electric control element to burn out occurs; thus further ensure the safe operation of electronic control module, further increase the security of air-conditioner.
In above-mentioned arbitrary technical scheme, described default aperture is the maximum opening of described electric expansion valve, when described electric expansion valve runs with maximum opening, the temperature of described electronic control module can be made to be reduced to below described first preset temperature.
Default aperture is set to the maximum opening of the first electric expansion valve, initial opening when namely starting shooting, then refrigerant pipe is in the process of starting shooting and when electronic control module is in high temperature risk status, all farthest can carry cold, to ensure that electronic control module is lowered the temperature with the fastest speed, the possibility burnt out by electric control element drops to minimum, thus ensure that the safe operation of electronic control module; Certainly, model and the maximum opening of refrigerant pipe, the first electric expansion valve should be suitable with electronic control module, during can ensure that air-conditioner runs under worst operating mode, the temperature of electronic control module also can be reduced to the first preset temperature by refrigerant pipe, below the higher limit of i.e. safe temperature, putting before this, the temperature of electronic control module could control in safe temperature range by refrigerant pipe and the first electric expansion valve, to ensure its functional reliability.
Additional aspect of the present invention and advantage become obvious by description part below, or are recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of air-conditioner described in some embodiments of the invention;
Fig. 2 is the structural representation of the air-conditioner described in other embodiments of the present invention;
Fig. 3 is the schematic flow sheet of the control method of air-conditioner described in some embodiments of the invention.
Wherein, the corresponding relation in Fig. 1 to Fig. 2 between Reference numeral and component names is:
10 electronic control module, 20 radiating modules, 21 refrigerant pipes, 22 first electric expansion valves, 23 second electric expansion valves, 30 condensers, 40 restricting elements, 50 evaporimeters, 60 compressors;
Wherein, in figure, arrow represents that refrigerant flows to.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Referring to Fig. 1 to Fig. 3, air-conditioner described according to some embodiments of the invention and control method thereof are described.
As depicted in figs. 1 and 2, the air-conditioner that the embodiment of first aspect present invention provides, comprise and to be connected successively the refrigerant flow formed by compressor 60, condenser 30, restricting element 40 and evaporimeter 50, also comprise: electronic control module 10, radiating module 20 and control module (not shown).
Particularly, radiating module 20 comprises refrigerant pipe 21 and first electric expansion valve 22 of serial connection, first electric expansion valve 22 is connected with the arrival end of refrigerant pipe 21, in refrigerant flow between radiating module 20 parallel connection access condenser 30 and evaporimeter 50, and be attempted by the refrigerant flow being provided with restricting element 40 between condenser 30 and evaporimeter 50, radiating module 20, near electronic control module 10, dispels the heat for electronic control module 10 to utilize the refrigerant that flows through refrigerant pipe 21; Control module is electrically connected with the first electric expansion valve 22, for obtaining the temperature value of electronic control module 10, and regulating the aperture of the first electric expansion valve 22 according to temperature value, maintaining in preset range to make the temperature of electronic control module 10.
The air-conditioner that the embodiment of first aspect present invention provides, refrigerant pipe 21 and the first electric expansion valve 22 is accessed by parallel in the refrigerant flow that is provided with restricting element between condenser 30 with evaporimeter 50, the refrigerant then with lower temperature can flow in refrigerant pipe 21, cold flowed to the electronic control module 10 near refrigerant pipe 21 by refrigerant pipe 21, make electronic control module 10 accelerate heat radiation; And control module can regulate the aperture of the first electric expansion valve 22 according to the temperature of electronic control module 10, and then regulate the coolant quantity entering refrigerant pipe 21, refrigerant pipe 21 is made to flow to the cold of electronic control module 10 adjusted, and then control the radiating rate of electronic control module 10, so that the temperature of electronic control module 10 is maintained in default safe temperature range, and can not fall too low, thus avoid to electronic control module 10 lower the temperature excessively cause cold waste.
Particularly, by in the refrigerant flow of connecting system in parallel for refrigerant pipe 21, and to connect the first electric expansion valve 22 at the arrival end of refrigerant pipe 21, can effectively control to enter the coolant quantity in refrigerant pipe 21 by the aperture controlling the first electric expansion valve 22, and then carry cold according to the actual temperature of electronic control module 10, thus both ensure that the safe operation of electronic control module 10, turn avoid the waste to system cold.
More specifically, after refrigerant flows out from condenser 30, there is lower temperature, a part enters in the refrigerant flow of system and enters evaporimeter 50 through restricting element 40, a part enters radiating module 20, carries cold by refrigerant pipe 21 to electronic control module 10, makes electronic control module 10 accelerate heat radiation, and refrigerant pipe 21 carries the number of cold directly related with the coolant quantity flowing through refrigerant pipe 21 to electronic control module 10, therefore control module can effectively regulate the coolant quantity entering refrigerant pipe 21 by the aperture of adjustment first electric expansion valve 22, and then regulate refrigerant pipe 21 to flow to the cold of electronic control module 10, control the radiating rate of electronic control module 10, and the foundation regulated is the actual temperature of electronic control module 10, thus can the temperature of electronic control module 10 be maintained in default safe temperature range, make electronic control module 10 temperature-constant operation in safe temperature range, and can not fall too low, namely the thermostatically controlled object of electronic control module 10 is realized, as for control module, it can be the independent control module for controlling the first electric expansion valve 22, also can be integrated in the control module of air-conditioner.
It should be noted that, cold refers to the capacity of water of the absorption heat that cryogenic object has, and the temperature of object is lower, and the ability absorbing heat is larger, then the cold had is more.
In some embodiments of the invention, control module comprises: detecting unit and performance element.
Particularly, for detecting the temperature of electronic control module 10, and temperature value is sent; Performance element is connected with semiconductor cooler with detecting unit, for receiving temperature value, and regulates the aperture of the first electric expansion valve 22 according to temperature value.
In the above-described embodiments, control module comprises detecting unit and performance element, detecting unit accurately detects the temperature of electronic control module 10, as regulation and control foundation, performance element is according to the aperture of regulation and control according to corresponding adjustment first electric expansion valve 22, the cold that refrigerant pipe 21 is exported and the actual needs of electronic control module 10 match, thus the temperature of electronic control module 10 are maintained in default temperature range, realize thermostatically controlled object.Particularly, detecting unit can be temperature sensor, infrared sensor equitemperature checkout gear.
In some embodiments of the invention, air-conditioner also comprises: high temperature protection module (not shown), for detecting the temperature of electronic control module 10 in real time, and when the temperature of electronic control module 10 meets or exceeds set temperature value, controls air-conditioner shutdown.
In the above-described embodiments; when temperature due to electronic control module 10 is too high; electric control element may be burned soon; therefore by arranging high temperature protection module, the temperature of electronic control module 10 is monitored in real time, under any circumstance; as long as the temperature of electronic control module 10 meets or exceeds set temperature value; air-conditioner is directly shut down protection, to avoid electric control element to be burned, thus effective superheat protecting function is served to air-conditioner.
In some embodiments of the invention, as shown in Figure 2, air-conditioner also comprises: the second electric expansion valve 23, be arranged in the refrigerant flow be in parallel with radiating module 20, and be electrically connected with control module, control module controls the aperture of the first electric expansion valve 22 and the second electric expansion valve 23, to regulate the temperature of electronic control module 10.
In the above-described embodiments, second electric expansion valve 23 is set in the refrigerant flow in parallel with radiating module 20, then can control to enter the coolant quantity in system refrigerant flow by the aperture of control second electric expansion valve 23, indirectly regulating action can be played to the coolant quantity entered in refrigerant pipe 21, therefore can be distributed more accurately with the refrigerant entered in system refrigerant flow entering refrigerant pipe 21 by the aperture of Comprehensive Control two electric expansion valves, more reasonably to distribute system cold and to utilize, thus the waste that reduce further system cold.
In some embodiments of the invention, air-conditioner also comprises: blower fan (not shown), be electrically connected with control module, control module controls blower fan and rotates or stop, and on electronic control module 10 and refrigerant pipe 21 air-out direction that is positioned at blower fan or air draught direction.
In the above-described embodiments, utilize blower fan to accelerate air flowing, the radiating rate of electronic control module 10 can be improved further; Utilize control module to control rotation or the stopping of blower fan, the radiating rate of electronic control module 10 can be regulated to a certain extent, concrete adjustment process is determined according to the temperature of electronic control module 10, like this, to control the coolant quantity in refrigerant pipe 21, be auxiliary to control blower fan, realized the temperature-constant operation of electronic control module 10 by Comprehensive Control, better effects if, reliability is higher.
In some embodiments of the invention, air-conditioner is transducer air conditioning, and electronic control module 10 is frequency conversion electrical control module.
In the above-described embodiments, compared to air-conditioner with fixed frequency, the heat that the frequency conversion electrical control module of transducer air conditioning produces is more, more easily there is superheating phenomenon, thus the aforementioned radiating module of frequency conversion electrical control module installation 20 and the control module that are transducer air conditioning are necessary, significantly can promote the heat-sinking capability of transducer air conditioning, make its operation lasting stability more under worst hot case, and then expand the market competitiveness of transducer air conditioning.
As shown in Figure 3, the control method of the air-conditioner that the embodiment of second aspect present invention provides, comprising as the air-conditioner in above-mentioned first aspect embodiment for controlling:
S10, controls the first electric expansion valve 22 and runs the first preset duration with default aperture after start;
S20, detects the temperature of electronic control module 10, obtains temperature value;
S30, regulates the aperture of the first electric expansion valve 22 according to temperature value, to regulate the temperature of electronic control module 10;
S40, interval second preset duration, returns and performs S20.
The control method of the air-conditioner that the embodiment of second aspect present invention provides, can ensure electronic control module 10 safe operation in the temperature range preset, thus avoid the waste to system cold, reliability is high.Particularly, due in the process of start, the workload of electronic control module 10 is larger, easily rise to higher temperature in the short period of time, therefore the first electric expansion valve 22 is first allowed to run a period of time with default aperture after start, default aperture is relatively large aperture, to ensure that refrigerant pipe 21 efficiently can export cold, thus avoids electronic control module 10 temperature in start process to rise to too high; And in the process of air-conditioner even running, then according to the observed temperature of electronic control module 10, specifically regulate the aperture of the first electric expansion valve 22, or increase, or reduce, or remain unchanged, to regulate the coolant quantity entering refrigerant pipe 21, and then the cold regulating refrigerant pipe 21 to export, regulate the radiating rate of electronic control module 10, make the temperature of electronic control module 10 maintain in default safe temperature range, so both ensure that the safe operation of electronic control module 10, turn avoid the waste to system cold.
In some embodiments of the invention, as shown in Figure 3, step S30 specifically comprises:
S302, judges whether temperature value is less than the first preset temperature, when temperature value is not less than the first preset temperature, performs step S304, when temperature value is less than the first preset temperature, and, perform step S306;
S304, controls the aperture of the first electric expansion valve 22 for presetting aperture;
S306, judges whether temperature value is less than the second preset temperature, when temperature value is not less than the second preset temperature, performs step S308, when temperature value is less than the second preset temperature, performs step S310;
S308, the aperture controlling the first electric expansion valve 22 remains unchanged;
S310, the aperture controlling the first electric expansion valve 22 reduces setting value;
Wherein, the first preset temperature is greater than the second preset temperature.
In the above-described embodiments, the first preset temperature is the higher limit of electronic control module 10 safe operation, and the second preset temperature is the lower limit of electronic control module 10 safe operation.Due to electronic control module 10 be in higher temperature time, exist and burn out the danger of electric elements, consequence is comparatively serious, and when being in lower temperature, then the problem of just energy consumption waste, can not have influence on the normal operation of air-conditioner, affect relatively little; Therefore first judge whether the temperature of electronic control module 10 is less than the first preset temperature, in other words, whether higher than safe range, judge whether electronic control module 10 is in high risk state, to make corresponding control in time, ensure the normal operation of air-conditioner; Ensureing under the prerequisite that air-conditioner normally runs, then judging whether observed temperature is less than the second preset temperature, in other words, whether lower than safe range, then making corresponding control, to avoid the waste of energy consumption; Like this, control procedure is made a distinction between the important and the lesser one, rationally reliably.
As for concrete adjustment process, when the temperature value of electronic control module 10 is too high, during beyond preset range, need to enter more refrigerant in refrigerant pipe 21, then the aperture of the first electric expansion valve 22 should be comparatively large, is specially default aperture, is certainly not limited to default aperture, to improve the radiating rate of electronic control module 10, its temperature is reduced in preset range gradually; If the temperature value of electronic control module 10 is in preset range, namely the radiating rate of electronic control module 10 is suitable, and thus the aperture of the first electric expansion valve 22 remains unchanged; If the temperature value of electronic control module 10 is lower than preset range, then need the aperture of reduction first electric expansion valve 22, specifically can reduce the setting value of fixing, be certainly not limited to the setting value that this is fixing, suitably to reduce the radiating rate of electronic control module 10, its temperature is gone up gradually in preset range.
In some embodiments of the invention, as shown in Figure 3, the control method of air-conditioner also comprises:
S50, detects the temperature of electronic control module 10 in real time after start, and when the temperature of electronic control module 10 meets or exceeds the 3rd preset temperature, controls air-conditioner shutdown;
Further, step S50 specifically comprises:
S502, detects the temperature of electronic control module 10 in real time;
S504, judges whether the temperature of electronic control module 10 is less than the 3rd preset temperature, when the temperature of electronic control module 10 is not less than the 3rd preset temperature, performs step S506, when the temperature of electronic control module 10 is less than the 3rd preset temperature, returns and performs step S502;
S506, controls air-conditioner shutdown;
Wherein the 3rd preset temperature is greater than the first preset temperature.
In the above-described embodiments, the 3rd preset temperature is the higher limit that electronic control module 10 can be run, and when the temperature of electronic control module 10 is increased to this temperature, the possibility that electric control element burns out is larger.Therefore the setting of high temperature protection step; make air-conditioner when the temperature of electronic control module 10 is increased to this temperature; can directly shut down to protect electronic control module 10; the situation avoiding electric control element to burn out occurs; thus further ensure the safe operation of electronic control module 10, further increase the security of air-conditioner.
In some embodiments of the invention, default aperture is the maximum opening of electric expansion valve, when electric expansion valve runs with maximum opening, the temperature of electronic control module 10 can be made to be reduced to below the first preset temperature.
In the above-described embodiments, default aperture is set to the maximum opening of the first electric expansion valve 22, initial opening when namely starting shooting, then refrigerant pipe 21 is in the process of starting shooting and when electronic control module 10 is in high temperature risk status, all farthest can carry cold, to ensure that electronic control module 10 is with the cooling of the fastest speed, the possibility burnt out by electric control element drops to minimum, thus ensure that the safe operation of electronic control module 10; Certainly, model and the maximum opening of refrigerant pipe 21, first electric expansion valve 22 should be suitable with electronic control module 10, during can ensure that air-conditioner runs under worst operating mode, the temperature of electronic control module 10 also can be reduced to the first preset temperature by refrigerant pipe 21, below the higher limit of i.e. safe temperature, putting before this, the temperature of electronic control module 10 could control in safe temperature range by refrigerant pipe 21 and the first electric expansion valve 22, to ensure its functional reliability.
In one particular embodiment of the present invention, air-conditioner is transducer air conditioning, and electronic control module 10 is frequency conversion electrical control module, and the first preset duration is 3min, and the second preset duration is 20s; And/or the first preset temperature is 80 DEG C, the second preset temperature is 77 DEG C, and the 3rd preset temperature is 85 DEG C; And/or, the maximum opening of setting value to be Lmax/20, Lmax be the first electric expansion valve 22.
Experience shows, the temperature of electronic control module 10 is at [77 DEG C, 80 DEG C) between time, get final product safe operation, therefore arrange [77 DEG C, 80 DEG C) be default safe temperature range, and temperature is when reaching 85 DEG C even higher, the risk that electric control element burns out is comparatively large, therefore the 3rd preset temperature is set to 85 DEG C, to ensure that electric control element can not burn out.
Certainly; those skilled in the art is to be understood that; different air-conditioners, the composition of its electronic control module 10 is different, and material also may be different; therefore also difference is existed to the ability to bear of temperature; therefore, the first preset temperature, the second preset temperature and the 3rd preset temperature are not limited to above-mentioned numerical value, can be other numerical value; but these technical schemes all do not depart from design philosophy of the present invention and aim, therefore also in protection scope of the present invention.
Through a large amount of tests, when first preset duration is set to 3min, namely when the first electric expansion valve 22 runs 3min with larger setting aperture, effectively can ensure that electronic control module 10 is started shooting in the process of operation under various operating mode, temperature can not reach 80 DEG C, thus effectively ensure that the safe operation of electronic control module 10 in start process; When second preset duration is set to 20s, namely in the process of air-conditioner even running, interval 20s does one-time detection and adjustment, can ensure that the temperature of electronic control module 10 fluctuates in preset range, or fluctuate in the edge of preset range, and can not rise too high or fall too low, so slightly adjust and can get back in preset range, avoid simultaneously and detect and the too frequent and energy consumption waste that causes of regulation and control.
But; those skilled in the art is to be understood that; the factors such as the temperature of the model of the radiating rate of electronic control module 10 and the signal of refrigerant pipe 21, the first electric expansion valve 22 and aperture, external environment are all relevant; therefore; first preset duration and the second preset duration are not limited to 3min and 20s; should specifically arrange as the case may be, but these technical schemes do not depart from design philosophy of the present invention and aim, thus in protection scope of the present invention yet.
Proved by test of many times, setting value is set to Lmax/20, the temperature of electronic control module 10 can be made to go up gradually in preset temperature range, and the aperture of the first electric expansion valve 21 can be reduced to 0, namely, when the temperature of frequency conversion electrical control module is too low, the first electric expansion valve 22 can be made to close.
Certainly; those skilled in the art is to be understood that; this is also relevant with the model of refrigerant pipe 21, the factor such as the model of the first electric expansion valve 22 and the temperature of aperture and external environment; therefore; setting value is also not limited to Lmax/20; should specifically arrange as the case may be, but these technical schemes do not depart from design philosophy of the present invention and aim yet, therefore in protection scope of the present invention yet.
In sum, air-conditioner provided by the invention, by access refrigerant pipe in parallel and the first electric expansion valve in the refrigerant flow that is provided with restricting element between condenser with evaporimeter, the refrigerant then with lower temperature can flow in refrigerant pipe, cold flowed to the electronic control module near refrigerant pipe by refrigerant pipe, make electronic control module accelerate heat radiation; And control module can regulate the aperture of the first electric expansion valve according to the temperature of electronic control module, and then regulate the coolant quantity entering refrigerant pipe, refrigerant pipe is made to flow to the cold of electronic control module adjusted, and then control the radiating rate of electronic control module, so that the temperature of electronic control module is maintained in default safe temperature range, and can not fall too low, thus avoid to electronic control module lower the temperature excessively cause cold waste.
In the present invention, term " first ", " second " object only for describing, and instruction or hint relative importance can not be interpreted as; Term " multiple " then refers to two or more, unless otherwise clear and definite restriction.The term such as term " installation ", " being connected ", " connection ", " fixing " all should be interpreted broadly, and such as, " connection " can be fixedly connected with, and also can be removably connect, or connects integratedly; " being connected " can be directly be connected, and also indirectly can be connected by intermediary.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 description of this description, specific features, structure, material or feature that the description of term " embodiment ", " some embodiments ", " specific embodiment " 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, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an air-conditioner, comprises and to be connected successively the refrigerant flow formed by compressor, condenser, restricting element and evaporimeter, it is characterized in that, also comprise:
Electronic control module;
Radiating module, described radiating module comprises refrigerant pipe and first electric expansion valve of serial connection, described first electric expansion valve is connected with the arrival end of described refrigerant pipe, in refrigerant flow between the described radiating module parallel connection described condenser of access and described evaporimeter, and be attempted by the refrigerant flow being provided with described restricting element between described condenser and described evaporimeter, described radiating module, near described electronic control module, is the heat radiation of described electronic control module to utilize the refrigerant flowing through described refrigerant pipe; With
Control module, is electrically connected with described first electric expansion valve, for obtaining the temperature value of described electronic control module, and regulating the aperture of described first electric expansion valve according to described temperature value, maintaining in preset range to make the temperature of described electronic control module.
2. air-conditioner according to claim 1, is characterized in that,
Described control module comprises:
Detecting unit, for detecting the temperature of described electronic control module, and sends temperature value; With
Performance element, is connected with described first electric expansion valve with described detecting unit, for receiving described temperature value, and regulates the aperture of described first electric expansion valve according to described temperature value.
3. air-conditioner according to claim 1, is characterized in that, also comprises:
High temperature protection module, for detecting the temperature of described electronic control module in real time, and when the temperature of described electronic control module meets or exceeds set temperature value, controlling described air-conditioner and shutting down.
4. air-conditioner according to any one of claim 1 to 3, is characterized in that, also comprises:
Second electric expansion valve, be arranged in the refrigerant flow be in parallel with described radiating module, and be electrically connected with described control module, described control module controls the aperture of described first electric expansion valve and described second electric expansion valve, to regulate the temperature of described electronic control module.
5. air-conditioner according to claim 4, is characterized in that, also comprises:
Blower fan, is electrically connected with described control module, and described control module controls described blower fan and rotates or stop, and on described electronic control module and the described refrigerant pipe air-out direction that is positioned at described blower fan or air draught direction.
6. air-conditioner according to any one of claim 1 to 3, is characterized in that,
Described air-conditioner is transducer air conditioning, and described electronic control module is frequency conversion electrical control module.
7. a control method for air-conditioner, for controlling the air-conditioner according to any one of the claims 1 to 6, is characterized in that, comprising:
Start step: control the first electric expansion valve after start and run the first preset duration with default aperture;
Detecting step: the temperature detecting electronic control module, obtains temperature value:
Regulation and control step: the aperture regulating described first electric expansion valve according to described temperature value, to regulate the temperature of described electronic control module;
Recheck step: interval second preset duration, returns execution detecting step.
8. the control method of air-conditioner according to claim 7, is characterized in that,
Described regulation and control step specifically comprises:
Judge whether described temperature value is less than the first preset temperature, when described temperature value is not less than described first preset temperature, the aperture controlling described first electric expansion valve is described default aperture;
When described temperature value is less than described first preset temperature, judge whether described temperature value is less than the second preset temperature, when described temperature value is not less than described second preset temperature, the aperture controlling described first electric expansion valve remains unchanged;
When described temperature value is less than described second preset temperature, the aperture controlling described first electric expansion valve reduces setting value;
Wherein, described first preset temperature is greater than described second preset temperature.
9. the control method of air-conditioner according to claim 8, is characterized in that, also comprises:
High temperature protection step: the temperature detecting described electronic control module after start in real time, and when the temperature of described electronic control module meets or exceeds the 3rd preset temperature, control the shutdown of described air-conditioner;
Wherein said 3rd preset temperature is greater than described first preset temperature.
10. the control method of air-conditioner according to claim 8 or claim 9, is characterized in that,
Described default aperture is the maximum opening of described electric expansion valve, when described electric expansion valve runs with maximum opening, the temperature of described electronic control module can be made to be reduced to below described first preset temperature.
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