CN104913403A - Motor cooling structure, air conditioner and motor cooling method - Google Patents
Motor cooling structure, air conditioner and motor cooling method Download PDFInfo
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- CN104913403A CN104913403A CN201510319199.9A CN201510319199A CN104913403A CN 104913403 A CN104913403 A CN 104913403A CN 201510319199 A CN201510319199 A CN 201510319199A CN 104913403 A CN104913403 A CN 104913403A
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- motor
- refrigerant pipe
- conditioner
- air
- refrigerant
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a motor cooling structure, an air conditioner and a motor cooling method. The motor cooling structure comprises a motor, a motor temperature sensor, a coolant pipe, an electromagnetic valve, and a controller; the motor temperature sensor is used for detecting operating temperature of the motor; the first end of the coolant pipe is connected to an outlet main line of a condenser of the air conditioner, and the second end thereof is connected to a gas-liquid separator of the air conditioner; the electromagnetic valve is disposed on the coolant pipe and is used for controlling connection or disconnection of the coolant pipe; the controller is used for adjusting the operating state of the electromagnetic valve according to the motor operating temperature detected by the motor temperature sensor. According to the technical scheme, the operating temperature of the motor can be set as basis of judgment on opening or not opening the electromagnetic valve, motor cooling control is more flexible and practical, and the motor can be cooled via coolant flowing out of the condenser when the temperature of the motor is too high, motor cooling cost is saved, and user experience is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of motor radiating structure, a kind of air-conditioner and a kind of motor radiating method.
Background technology
At present, along with the raising of people's living standard and the enhancing of awareness of saving energy, vast average family come into by convertible frequency air-conditioner, and obtains applying more and more widely.Existing air-conditioner is all generally the fin taking to open on the surface of motor different modes, carrys out the method for cooling motor with the air quantity flowing through its surface.The features such as direct current variable frequency motor is energy-conservation with it, flexible, the easy installation and maintenance of control, are applied in air-conditioning system more and more, are substantially increased heat transfer effect and the service efficiency of air-conditioning system.
But, along with the rising of indoor and outdoor temperature, the increase of motor speed, caloric value is also larger, being in this state for a long time can make the operating efficiency of motor reduce, also motor may be burnt out time serious, the effectiveness comparison of this forced-convection heat transfer is poor, when air-conditioner runs when some are severe, amount that the motor feels hot can continue to rise, finally motor is likely caused to burn out, due to the heating quantitative limitation of motor, the mode such as Limited Current and rotation speed of fan often taked by convertible frequency air-conditioner, with reduce motor be in operation produce heat, the energy of motor is caused not to be effectively utilized like this, affect the normal operation of air-conditioning, also the safety and reliability that air-conditioning uses can be reduced.
Therefore, how while guarantee air-conditioning normally runs, effectively for electric motor temperature reduction dispels the heat, become current problem demanding prompt solution.
Summary of the invention
The present invention, just based on the problems referred to above, proposes a kind of new technical scheme, while can ensureing that air-conditioning normally runs, is electric motor temperature reduction heat radiation effectively.
For this reason, one object of the present invention is to propose a kind of motor radiating structure.
Another object of the present invention is to propose a kind of air-conditioner, has above-mentioned motor radiating structure.
Another object of the present invention is to propose a kind of motor radiating method, uses above-mentioned motor radiating structure.
For achieving the above object, the embodiment of a first aspect of the present invention proposes a kind of motor radiating structure, for air-conditioner, comprising: motor, for driving described air-conditioner work; Motor temperature sensor, is connected to described motor, for detecting the operating temperature of described motor; Refrigerant pipe, is arranged on described motor, and the first end of described refrigerant pipe is connected to the outlet main line of the condenser of described air-conditioner, and the second end of described refrigerant pipe is connected to the gas-liquid separator of described air-conditioner; Magnetic valve, be arranged on described refrigerant pipe, for controlling the break-make of described refrigerant pipe, wherein, when described refrigerant pipe conducting, the refrigerant of described air-conditioner enters described refrigerant pipe from described outlet main line through described first end, and is flowing into described gas-liquid separator by described second end after described motor; Controller, is connected to described motor temperature sensor and described magnetic valve, and the operating temperature for the described motor detected according to described motor temperature sensor adjusts the duty of described magnetic valve.
Motor radiating structure according to an embodiment of the invention, a branch road is drawn at the condensator outlet of air-conditioner, this branch road and refrigerant pipe, refrigerant pipe is connected to the gas-liquid separator of air-conditioner through the motor of air-conditioner, simultaneously, refrigerant pipe is also provided with magnetic valve, and is provided with motor temperature sensor on motor, detect the operating temperature of motor.Like this, when detecting that the operating temperature of motor is too high, namely when the operating temperature of motor exceedes predetermined temperature threshold, by controller opens solenoid valve, when magnetic valve is opened, the part refrigerant of condenser will flow to refrigerant pipe as branch road from the outlet main line of condenser, through magnetic valve and capillary, refrigerant arrives motor after capillary-compensated, thus through motor be motor heat absorption, refrigerant after heat absorption flows into gas-liquid separator through refrigerant pipe again, to re-circulate to the compressor of air-conditioner, so constantly circulation, just can realize the thermolysis to motor.When detecting that the operating temperature of motor does not exceed predetermined temperature threshold, can shut electromagnetic valve, refrigerant would not flow through refrigerant pipe, can stop lowering the temperature to motor.By this technical scheme, the operating temperature of motor can be set to the basis for estimation of whether opens solenoid valve, make to have more flexibility and practicality to the control of motor radiating, thus the refrigerant flowing out condenser can be utilized to lower the temperature for motor radiating when motor temperature is too high, save the cost for electric motor temperature reduction heat radiation, and effectively reduce the operating temperature of motor, thus the running current of air-conditioner need not be limited because motor temperature is too high or reduce fan blade rotating speed, the efficiency of motor is played to greatest extent, improves Consumer's Experience.Meanwhile, refrigerant is also re-circulated to gas-liquid separator and the compressor of air-conditioner by this motor radiating structure, avoids the waste of refrigerant, has saved the job costs of air-conditioner.
In addition, the motor radiating structure provided according to the above embodiment of the present invention also has following additional technical feature:
According to one embodiment of present invention, described refrigerant pipe coiling or embedding are arranged on the surface of described motor.
Motor radiating structure according to an embodiment of the invention, refrigerant pipe coiling or embedding are arranged on the surface of motor, the surface area of refrigerant pipe can be increased, namely the contact area of refrigerant pipe and motor is increased, thus the utilization rate that can promote refrigerant, with the radiating efficiency of lifting motor, certainly, the form that refrigerant pipe also can adapt to actual needs with other matches with motor.
According to one embodiment of present invention, also comprising: expansion valve, between described condenser and described motor, being arranged on described outlet main line or on described refrigerant pipe, for controlling the flow of described refrigerant.
Motor radiating structure according to an embodiment of the invention, need to arrange the expansion valve controlling cold medium flux between condenser and motor, to avoid the normal refrigeration affecting air-conditioner because cold medium flux is excessive, and avoid the radiating efficiency reducing motor because cold medium flux is too small.
According to one embodiment of present invention, when described expansion valve is Temp. expansion valve, motor temperature is higher, and the aperture of described Temp. expansion valve is larger.
Motor radiating structure according to an embodiment of the invention, expansion valve is preferably Temp. expansion valve, like this, when the temperature in air-conditioner is higher, be illustrated as motor radiating and need more refrigerant, and the aperture of Temp. expansion valve just raises with temperature and increases, and has adapted to the heat radiation needs of motor, otherwise, temperature in air-conditioner is lower, and the heat radiation of motor needs less, and the aperture of Temp. expansion valve is also less, therefore, Temp. expansion valve can adapt to the actual demand of user further.Certainly, expansion valve also can be the expansion valve of other types in addition as required.
According to one embodiment of present invention, also comprise: capillary, connect with described magnetic valve, for carrying out throttling to the described refrigerant flowing into described motor radiating structure.
Motor radiating structure according to an embodiment of the invention, capillary can be individual layer capillary structure or multilayer capillary structure, connects with magnetic valve, and its capillary structure can play throttling action, thus the convenient flow controlling refrigerant.In addition, the length of capillary can be arranged according to actual needs.
According to one embodiment of present invention, the cross sectional shape of described refrigerant pipe is circular or polygon.
Motor radiating structure according to an embodiment of the invention, the cross sectional shape of refrigerant pipe can be circular or polygon, also can be other shapes in addition as required, wherein, the limit number of the cross sectional shape of refrigerant pipe is more or shape is more tortuous, the contact area of itself and refrigerant is larger, better to the cooling effect of motor.
According to one embodiment of present invention, described motor is provided with fan blade, producing air quantity when described fan blade rotates is described motor radiating.
Motor radiating structure according to an embodiment of the invention, can produce air-flow when fan blade rotates, the air-flow of flowing can be motor radiating.Can ensure still to realize motor radiating demand when refrigerant pipe breaks down, for the normal work of air-conditioner provides guarantee by arranging fan blade.
According to one embodiment of present invention, also comprise: motor base, be arranged on below described motor, for placing described motor.
Motor radiating structure according to an embodiment of the invention, motor base can be used to place motor, makes motor firm, increases the security of motor and air-conditioner.
According to one embodiment of present invention, the quantity of described refrigerant pipe is one or more.
Motor radiating structure according to an embodiment of the invention, the quantity of refrigerant pipe can be single, thus reduces the cost of air-conditioner, and when user's request, in order to ensure the radiating effect of motor, can also arrange multiple refrigerant pipe, to increase heat dissipation capacity.
Second aspect present invention embodiment provides a kind of air-conditioner, and this air-conditioner has the motor radiating structure that first aspect present invention any embodiment provides, and therefore this air-conditioner has whole beneficial effects of the motor radiating structure that above-mentioned any embodiment provides.
Third aspect present invention embodiment provides a kind of motor radiating method, use the motor radiating structure that first aspect present invention embodiment provides, for the air-conditioner that second aspect present invention embodiment provides, comprising: the operating temperature being detected the motor of described air-conditioner by motor temperature sensor; According to testing result, determine whether the duty of the magnetic valve adjusted in described motor radiating structure, for determining whether, the refrigerant of the condenser from described air-conditioner is imported the refrigerant pipe be connected with the outlet main line of described condenser, wherein, described refrigerant pipe is arranged on described motor.
Motor radiating method according to an embodiment of the invention, when detecting that the operating temperature of motor is too high, namely when the operating temperature of motor exceedes predetermined temperature threshold, by controller opens solenoid valve, when magnetic valve is opened, the part refrigerant of condenser will flow to refrigerant pipe as branch road from the outlet main line of condenser, through magnetic valve and capillary, refrigerant arrives motor after capillary-compensated, thus through motor be motor heat absorption, refrigerant after heat absorption flows into gas-liquid separator through refrigerant pipe again, to re-circulate to the compressor of air-conditioner, so constantly circulation, just can realize the thermolysis to motor.When detecting that the operating temperature of motor does not exceed predetermined temperature threshold, can shut electromagnetic valve, refrigerant would not flow through refrigerant pipe, can stop lowering the temperature to motor.By this technical scheme, the operating temperature of motor can be set to the basis for estimation of whether opens solenoid valve, make to have more flexibility and practicality to the control of motor radiating, thus the refrigerant flowing out condenser can be utilized to lower the temperature for motor radiating when motor temperature is too high, save the cost for electric motor temperature reduction heat radiation, and effectively reduce the operating temperature of motor, thus the running current of air-conditioner need not be limited because motor temperature is too high or reduce fan blade rotating speed, the efficiency of motor is played to greatest extent, improves Consumer's Experience.Meanwhile, refrigerant is also re-circulated to gas-liquid separator and the compressor of air-conditioner by this motor radiating structure, avoids the waste of refrigerant, has saved the job costs of air-conditioner.
According to one embodiment of present invention, described according to testing result, determine whether the duty of the magnetic valve adjusted in described motor radiating structure, specifically comprise: when the operating temperature that described testing result is described motor is more than or equal to predetermined temperature threshold, the duty of described magnetic valve is set to opening, with refrigerant described in conducting, it is described motor radiating; When the operating temperature that described testing result is described motor continues to be less than described predetermined temperature threshold in the first prefixed time interval, the duty of described magnetic valve is set to closed condition, and not allowing described refrigerant to flow into described refrigerant pipe is described motor radiating.
Motor radiating method according to an embodiment of the invention, specifically, predetermined threshold can be set for the operating temperature of motor, when the operating temperature of motor being detected higher than predetermined threshold, illustrate that air-conditioner operating pressure is larger, power of motor is too high, high temperature can be produced, therefore, now can opens solenoid valve, the refrigerant flowed out by condenser imports refrigerant pipe, refrigerant flow through refrigerant pipe and electric disc around or inlay part time, namely can be motor to cool, thus improve the radiating effect of motor while the operating efficiency of not sacrificing air-conditioner.And if the operating temperature of motor continues to be less than the first scheduled time threshold value in the first predetermined time interval, illustrate that the operating pressure of air-conditioner is little, without the need to being that motor carries out temperature with high efficiency by refrigerant, then shut electromagnetic valve, avoids the waste of refrigerant cold.
According to one embodiment of present invention, also comprise: when the time detecting that described magnetic valve is in described opening is more than or equal to the second predetermined time interval, the duty of described magnetic valve is set to described closed condition, and not allowing described refrigerant to flow into described refrigerant pipe is described motor radiating.
Motor radiating method according to an embodiment of the invention, when magnetic valve was opened after the long period, can think that motor has realized required radiating effect, now, in order to not waste the cold of refrigerant, can shut electromagnetic valve, and stop carrying out radiating treatment to motor.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be 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 shows the block diagram of motor radiating structure according to an embodiment of the invention;
Fig. 2 shows the block diagram of air-conditioner according to an embodiment of the invention;
Fig. 3 shows the connection diagram of the motor radiating structure in air-conditioner according to an embodiment of the invention;
Fig. 4 shows the flow chart of motor radiating method according to an embodiment of the invention;
Fig. 5 shows the flow chart of motor radiating method according to another embodiment of the invention.
Wherein, the corresponding relation in Fig. 1 to Fig. 3 between Reference numeral and component names is:
1 air-conditioner, 11 motor radiating structures, 111 motors, 112 motor temperature sensor, 113 refrigerant pipes, 114 magnetic valves, 115 controllers, 116 capillaries, 117 expansion valves, 12 condensers, 13 gas-liquid separators, 14 cross valves, 15 stop valves, 16 compressors, 17 oil eliminators.
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.
Fig. 1 shows the block diagram of motor radiating structure according to an embodiment of the invention.
As shown in Figure 1, motor radiating structure 11 according to an embodiment of the invention, for air-conditioner, comprising: motor 111, for driving air-conditioner work; Motor temperature sensor 112, is connected to motor 111, for detecting the operating temperature of motor 111; Refrigerant pipe 113, is arranged on motor 111, and the first end of refrigerant pipe 113 is connected to the outlet main line of the condenser 12 of air-conditioner, and the second end of refrigerant pipe 113 is connected to the gas-liquid separator 13 of air-conditioner; Magnetic valve 114, is arranged on refrigerant pipe 113, for controlling the break-make of refrigerant pipe 113, wherein, when refrigerant pipe 113 conducting, the refrigerant of air-conditioner enters refrigerant pipe 113 from outlet main line through first end, and is flowing into gas-liquid separator 13 by the second end after motor 111; Controller 115, is connected to motor temperature sensor 112 and magnetic valve 114, and the operating temperature for the motor 111 detected according to motor temperature sensor 112 adjusts the duty of magnetic valve 114.
Motor radiating structure 11 according to an embodiment of the invention, extraction branch road is exported at the condenser 12 of air-conditioner, this branch road and refrigerant pipe 113, refrigerant pipe 113 is connected to the gas-liquid separator 13 of air-conditioner through the motor 111 of air-conditioner, simultaneously, refrigerant pipe 113 is also provided with magnetic valve 114, and is provided with motor temperature sensor 112 on motor 111, detect the operating temperature of motor 111.Like this, when detecting that the operating temperature of motor 111 is too high, namely when the operating temperature of motor 111 exceedes predetermined temperature threshold, by controller 115 opens solenoid valve 114, when magnetic valve 114 is opened, the part refrigerant of condenser 12 will flow to refrigerant pipe 113 as branch road from the outlet main line of condenser 12, through magnetic valve 114 and capillary 116, refrigerant arrives motor 111 after capillary 116 throttling, thus be that motor 111 absorbs heat when through motor 111, refrigerant after heat absorption flows into gas-liquid separator 13 through refrigerant pipe 113 again, to re-circulate to the compressor of air-conditioner, so constantly circulation, just can realize the thermolysis to motor 111.When detecting that the operating temperature of motor 111 does not exceed predetermined temperature threshold, can shut electromagnetic valve 114, refrigerant would not flow through refrigerant pipe 113, can stop lowering the temperature to motor 111.By this technical scheme, the operating temperature of motor 111 can be set to the basis for estimation of whether opens solenoid valve 114, the control to motor 111 dispels the heat is made to have more flexibility and practicality, thus the refrigerant flowing out condenser 12 can be utilized to be motor 111 radiating and cooling when motor 111 temperature is too high, save the cost for motor 111 cooling, and effectively reduce the operating temperature of motor 111, thus the running current of air-conditioner need not be limited because motor 111 temperature is too high or reduce fan blade rotating speed, the efficiency of motor 111 is played to greatest extent, improve Consumer's Experience.Meanwhile, refrigerant is also re-circulated to gas-liquid separator 13 and the compressor of air-conditioner by this motor radiating structure 11, avoids the waste of refrigerant, has saved the job costs of air-conditioner.
In addition, the motor radiating structure 11 provided according to the above embodiment of the present invention also has following additional technical feature:
According to one embodiment of present invention, refrigerant pipe 113 coils or embeds the surface being arranged on motor 111.
Motor radiating structure 11 according to an embodiment of the invention, refrigerant pipe 113 coils or embeds the surface being arranged on motor 111, the surface area of refrigerant pipe 113 can be increased, namely the contact area of refrigerant pipe 113 and motor 111 is increased, thus the utilization rate that can promote refrigerant, with the radiating efficiency of lifting motor 111, certainly, the form that refrigerant pipe 113 also can adapt to actual needs with other matches with motor 111.
According to one embodiment of present invention, also comprising: expansion valve 117, between condenser 12 and motor 111, being arranged on outlet main line or on refrigerant pipe 113, for controlling the flow of refrigerant.
Motor radiating structure 11 according to an embodiment of the invention, need to arrange the expansion valve 117 controlling cold medium flux between condenser 12 and motor 111, to avoid the normal refrigeration affecting air-conditioner because cold medium flux is excessive, and avoid the radiating efficiency reducing motor 111 because cold medium flux is too small.
According to one embodiment of present invention, when expansion valve 117 is Temp. expansion valve 117, motor 111 temperature is higher, and the aperture of Temp. expansion valve 117 is larger.
Motor radiating structure 11 according to an embodiment of the invention, expansion valve 117 is preferably Temp. expansion valve 117, like this, when the temperature in air-conditioner is higher, be illustrated as motor 111 heat radiation and need more refrigerant, and the aperture of Temp. expansion valve 117 just raises with temperature and increases, the heat radiation needs of motor 111 are adapted to, otherwise, temperature in air-conditioner is lower, and the heat radiation of motor 111 needs less, and the aperture of Temp. expansion valve 117 is also less, therefore, Temp. expansion valve 117 can adapt to the actual demand of user further.Certainly, expansion valve 117 also can be the expansion valve 117 of other types in addition as required.
According to one embodiment of present invention, also comprise: capillary 116, connect with magnetic valve 114, for carrying out throttling to the refrigerant flowing into motor radiating structure 11.
Motor radiating structure 11 according to an embodiment of the invention, capillary 116 can be individual layer capillary structure or multilayer capillary structure, connects with magnetic valve 114, and its capillary structure can play throttling action, thus the convenient flow controlling refrigerant.In addition, the length of capillary 116 can be arranged according to actual needs.
According to one embodiment of present invention, the cross sectional shape of refrigerant pipe 113 is circular or polygon.
Motor radiating structure 11 according to an embodiment of the invention, the cross sectional shape of refrigerant pipe 113 can be circular or polygon, also can be other shapes in addition as required, wherein, the limit number of the cross sectional shape of refrigerant pipe 113 is more or shape is more tortuous, the contact area of itself and refrigerant is larger, better to the cooling effect of motor 111.
According to one embodiment of present invention, motor 111 is provided with fan blade, producing air quantity when fan blade rotates is that motor 111 dispels the heat.
Motor radiating structure 11 according to an embodiment of the invention, can produce air-flow when fan blade rotates, the air-flow of flowing can dispel the heat for motor 111.Can ensure still to realize motor 111 radiating requirements when refrigerant pipe 113 breaks down, for the normal work of air-conditioner provides guarantee by arranging fan blade.
According to one embodiment of present invention, also comprise: motor base, be arranged on below motor 111, for placing motor 111.
Motor radiating structure 11 according to an embodiment of the invention, motor base can be used to place motor 111, makes motor 111 firm, increases the security of motor 111 and air-conditioner.
According to one embodiment of present invention, the quantity of refrigerant pipe 113 is one or more.
Motor radiating structure 11 according to an embodiment of the invention, the quantity of refrigerant pipe 113 can be single, thus reduces the cost of air-conditioner, and when user's request, in order to ensure the radiating effect of motor 111, multiple refrigerant pipe 113 can also be set, to increase heat dissipation capacity.
Fig. 2 shows the block diagram of air-conditioner according to an embodiment of the invention.
As shown in Figure 2, the air-conditioner 1 of one embodiment of the present of invention has the motor radiating structure 11 that any embodiment shown in Fig. 1 provides, therefore, air-conditioner 1 has whole beneficial effects of the motor radiating structure 11 that above-mentioned any embodiment provides, and does not repeat them here.Meanwhile, this air-conditioner 1 also comprises the parts such as compressor, condenser, gas-liquid separator, cross valve, oil eliminator, not shown in fig. 2.
Fig. 3 shows the connection diagram of the motor radiating structure in air-conditioner according to an embodiment of the invention.
As shown in Figure 3, in air-conditioner 1, magnetic valve 114 is arranged on refrigerant pipe 113, and refrigerant pipe 113 one end is connected to motor 111, and the other end is connected to gas-liquid separator 13.Wherein, after magnetic valve 114 is connected with capillary 116, in parallel with through the condensed primary flow path of condenser 12, the entrance of magnetic valve 114 is between expansion valve 117 and stop valve 15, or between condenser 12 and expansion valve 117, or be positioned at condenser 12 and export in the primary flow path of optional position.The refrigerant pipe 113 of motor cooling branch road is wound around or is embedded on motor 111, the port of export of branch road is positioned on gas-liquid separator 13 entrance pipe, motor temperature sensor 112 is arranged on motor 111, the temperature of motor 111 can be detected, compressor 16 is connected with oil eliminator 17, oil eliminator 17 is connected to cross valve 14, and refrigerant can flow through compressor 16, oil eliminator 17, cross valve 14 successively.
When the unit of air-conditioner 1 receives power-on command, compressor 16 is opened, and automatically controlled mainboard moment detects motor temperature Td, when satisfy condition Td >=e time, wherein, e is predetermined temperature threshold, and wherein, e >=75 DEG C, magnetic valve 114 receives motor cooling order and opens.Refrigerant is out divided into two-way afterwards from condenser 12, one road is flowed out from primary flow path pipe and is entered evaporation side, one tunnel enters motor cooling branch road through magnetic valve 114 and capillary 116, after capillary 116 pairs of further throttlings of branch road refrigerant, refrigerant arrives motor 111, motor 111 is dispelled the heat, absorbs the refrigerant of the heat of motor 111, after the gaseous coolant after cross valve 14 converges, enter gas-liquid separator 13 with from evaporation side.When detecting that motor temperature Td≤e continues to reach n minute or magnetic valve 114 continues opening time t >=c minute, wherein, 3min≤n≤15min, 3min≤c≤15min, magnetic valve 114 cuts out, and exits motor cooling order, wherein, n is the first predetermined time interval, and c is the second predetermined time interval.
Fig. 4 shows the flow chart of motor radiating method according to an embodiment of the invention.
As shown in Figure 4, motor radiating method according to an embodiment of the invention, uses the motor radiating structure 11 that above-mentioned any embodiment provides, for air-conditioner 1, comprising:
Step 402, detects the operating temperature of the motor of air-conditioner by motor temperature sensor.
Step 404, according to testing result, determining whether the duty of the magnetic valve adjusted in motor radiating structure, for determining whether, the refrigerant of the condenser from air-conditioner being imported the refrigerant pipe be connected with the outlet main line of condenser, wherein, refrigerant pipe is arranged on motor.
Motor radiating method according to an embodiment of the invention, when detecting that the operating temperature of motor is too high, namely when the operating temperature of motor exceedes predetermined temperature threshold, by controller opens solenoid valve, when magnetic valve is opened, the part refrigerant of condenser will flow to refrigerant pipe as branch road from the outlet main line of condenser, through magnetic valve and capillary, refrigerant arrives motor after capillary-compensated, thus through motor be motor heat absorption, refrigerant after heat absorption flows into gas-liquid separator through refrigerant pipe again, to re-circulate to the compressor of air-conditioner, so constantly circulation, just can realize the thermolysis to motor.When detecting that the operating temperature of motor does not exceed predetermined temperature threshold, can shut electromagnetic valve, refrigerant would not flow through refrigerant pipe, can stop lowering the temperature to motor.By this technical scheme, the operating temperature of motor can be set to the basis for estimation of whether opens solenoid valve, make to have more flexibility and practicality to the control of motor radiating, thus the refrigerant flowing out condenser can be utilized to lower the temperature for motor radiating when motor temperature is too high, save the cost for electric motor temperature reduction heat radiation, and effectively reduce the operating temperature of motor, thus the running current of air-conditioner need not be limited because motor temperature is too high or reduce fan blade rotating speed, the efficiency of motor is played to greatest extent, improves Consumer's Experience.Meanwhile, refrigerant is also re-circulated to gas-liquid separator and the compressor of air-conditioner by this motor radiating structure, avoids the waste of refrigerant, has saved the job costs of air-conditioner.
According to one embodiment of present invention, step 404 specifically comprises: when the operating temperature that testing result is motor is more than or equal to predetermined temperature threshold, the duty of magnetic valve is set to opening, with conducting refrigerant, is motor radiating; When the operating temperature that testing result is motor continues to be less than predetermined temperature threshold in the first prefixed time interval, the duty of magnetic valve is set to closed condition, not allowing refrigerant to flow into refrigerant pipe is motor radiating.
Motor radiating method according to an embodiment of the invention, specifically, predetermined threshold can be set for the operating temperature of motor, when the operating temperature of motor being detected higher than predetermined threshold, illustrate that air-conditioner operating pressure is larger, power of motor is too high, high temperature can be produced, therefore, now can opens solenoid valve, the refrigerant flowed out by condenser imports refrigerant pipe, refrigerant flow through refrigerant pipe and electric disc around or inlay part time, namely can be motor to cool, thus improve the radiating effect of motor while the operating efficiency of not sacrificing air-conditioner.And if the operating temperature of motor continues to be less than the first scheduled time threshold value in the first predetermined time interval, illustrate that the operating pressure of air-conditioner is little, without the need to being that motor carries out temperature with high efficiency by refrigerant, then shut electromagnetic valve, avoids the waste of refrigerant cold.
According to one embodiment of present invention, also comprise: when the time detecting that magnetic valve is in opening is more than or equal to the second predetermined time interval, the duty of magnetic valve is set to closed condition, not allowing refrigerant to flow into refrigerant pipe is motor radiating.
Motor radiating method according to an embodiment of the invention, when magnetic valve was opened after the long period, can think that motor has realized required radiating effect, now, in order to not waste the cold of refrigerant, can shut electromagnetic valve, and stop carrying out radiating treatment to motor.
Fig. 5 shows the flow chart of motor radiating method according to another embodiment of the invention.
As shown in Figure 5, motor radiating method according to another embodiment of the invention, comprising:
Step 502, detects the work temperature d of motor.
Step 504, judges whether the work temperature d >=e of motor, and wherein, e is predetermined temperature threshold, and e >=75 DEG C, when judged result is for being, enter step 506, when judged result is no, returns step 502.
Step 506, opens solenoid valve, so that the refrigerant in condenser is imported refrigerant pipe, is motor radiating.
Step 508, judges whether following condition at least meets one: motor temperature Td≤e continues to reach n minute; Magnetic valve 114 continues opening time t >=c minute, and wherein, n is the first predetermined time interval, and 3min≤n≤15min, c is the second predetermined time interval, 3min≤c≤15min.When judged result is for being, entering step 510, when judged result is no, returning step 506.
Step 510, shut electromagnetic valve also returns step 502, to forbid that refrigerant flows into refrigerant pipe, stops as motor radiating.
More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, the operating temperature of motor can be set to the basis for estimation of whether opens solenoid valve, make to have more flexibility and practicality to the control of motor radiating, thus the refrigerant flowing out condenser can be utilized to lower the temperature for motor radiating when motor temperature is too high, save the cost for electric motor temperature reduction heat radiation, and effectively reduce the operating temperature of motor, thus the running current of air-conditioner need not be limited because motor temperature is too high or reduce fan blade rotating speed, the efficiency of motor is played to greatest extent, improve Consumer's Experience.Meanwhile, refrigerant is also re-circulated to gas-liquid separator and the compressor of air-conditioner by this motor radiating structure, avoids the waste of refrigerant, has saved the job costs of air-conditioner.
In the present invention, term " first ", " second ", " the 3rd " object only for describing, and instruction or hint relative importance can not be interpreted as; Term " multiple " represents two or more; Term " is connected ", " connection " etc. all should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, 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 ", " another 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. a motor radiating structure, for air-conditioner, is characterized in that, comprising:
Motor, for driving described air-conditioner work;
Motor temperature sensor, is connected to described motor, for detecting the operating temperature of described motor;
Refrigerant pipe, is arranged on described motor, and the first end of described refrigerant pipe is connected to the outlet main line of the condenser of described air-conditioner, and the second end of described refrigerant pipe is connected to the gas-liquid separator of described air-conditioner;
Magnetic valve, be arranged on described refrigerant pipe, for controlling the break-make of described refrigerant pipe, wherein, when described refrigerant pipe conducting, the refrigerant of described air-conditioner enters described refrigerant pipe from described outlet main line through described first end, and is flowing into described gas-liquid separator by described second end after described motor;
Controller, is connected to described motor temperature sensor and described magnetic valve, and the operating temperature for the described motor detected according to described motor temperature sensor adjusts the duty of described magnetic valve.
2. motor radiating structure according to claim 1, is characterized in that, described refrigerant pipe coiling or embedding are arranged on the surface of described motor.
3. motor radiating structure according to claim 2, is characterized in that, also comprises:
Expansion valve, between described condenser and described motor, is arranged on described outlet main line or on described refrigerant pipe, for controlling the flow of described refrigerant.
4. motor radiating structure according to claim 3, is characterized in that, when described expansion valve is Temp. expansion valve, motor temperature is higher, and the aperture of described Temp. expansion valve is larger.
5. motor radiating structure according to claim 4, is characterized in that, also comprises:
Capillary, connects with described magnetic valve, for carrying out throttling to the described refrigerant flowing into described motor radiating structure.
6. motor radiating structure according to any one of claim 1 to 5, is characterized in that, the quantity of described refrigerant pipe is one or more.
7. an air-conditioner, is characterized in that, comprises the motor radiating structure according to any one of claim 1 to 6.
8. a motor radiating method, uses the motor radiating structure according to any one of claim 1 to 6, for air-conditioner, it is characterized in that, comprising:
The operating temperature of the motor of described air-conditioner is detected by motor temperature sensor;
According to testing result, determine whether the duty of the magnetic valve adjusted in described motor radiating structure, for determining whether, the refrigerant of the condenser from described air-conditioner is imported the refrigerant pipe be connected with the outlet main line of described condenser, wherein, described refrigerant pipe is arranged on described motor.
9. motor radiating method according to claim 8, is characterized in that, described according to testing result, determines whether the duty of the magnetic valve adjusted in described motor radiating structure, specifically comprises:
When the operating temperature that described testing result is described motor is more than or equal to predetermined temperature threshold, the duty of described magnetic valve being set to opening, with refrigerant described in conducting, is described motor radiating;
When the operating temperature that described testing result is described motor continues to be less than described predetermined temperature threshold in the first prefixed time interval, the duty of described magnetic valve is set to closed condition, and not allowing described refrigerant to flow into described refrigerant pipe is described motor radiating.
10. motor radiating method according to claim 9, is characterized in that, also comprise:
When the time detecting that described magnetic valve is in described opening is more than or equal to the second predetermined time interval, the duty of described magnetic valve is set to described closed condition, and not allowing described refrigerant to flow into described refrigerant pipe is described motor radiating.
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| CN201510319199.9A CN104913403A (en) | 2015-06-11 | 2015-06-11 | Motor cooling structure, air conditioner and motor cooling method |
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| CN105871141A (en) * | 2016-06-02 | 2016-08-17 | 广西正源电机有限公司 | Efficient three-phase asynchronous variable-frequency speed regulating electric motor |
| CN107228455A (en) * | 2017-06-09 | 2017-10-03 | 青岛海尔空调器有限总公司 | A kind of air conditioner and control method |
| CN107846114A (en) * | 2017-10-27 | 2018-03-27 | 青岛海信日立空调系统有限公司 | Electric machine radiator and air conditioner |
| CN109945390A (en) * | 2019-03-29 | 2019-06-28 | 广东美的制冷设备有限公司 | Air conditioner and its high-temperature protection method and device |
| CN111442417A (en) * | 2020-04-09 | 2020-07-24 | 广东美的制冷设备有限公司 | Air conditioner, control method and control device thereof, and computer readable storage medium |
| US10782057B2 (en) | 2017-12-29 | 2020-09-22 | Johnson Controls Technology Company | Motor temperature control technique with temperature override |
| CN111829107A (en) * | 2019-04-16 | 2020-10-27 | 维谛技术有限公司 | Cooling device, method and air conditioning system |
| CN111895524A (en) * | 2020-08-12 | 2020-11-06 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
| CN112611120A (en) * | 2020-12-23 | 2021-04-06 | 南通常测机电设备有限公司 | Water chiller for new energy motor and adjusting method thereof |
| CN112653293A (en) * | 2020-12-10 | 2021-04-13 | 珠海格力电器股份有限公司 | Temperature control equipment, motor refrigerant cold heat dissipation method, device, equipment and storage medium |
| CN115183392A (en) * | 2022-07-08 | 2022-10-14 | 广东美的制冷设备有限公司 | Multi-split air conditioning system, heat dissipation control method thereof and computer readable storage medium |
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| CN105871141A (en) * | 2016-06-02 | 2016-08-17 | 广西正源电机有限公司 | Efficient three-phase asynchronous variable-frequency speed regulating electric motor |
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| CN112653293A (en) * | 2020-12-10 | 2021-04-13 | 珠海格力电器股份有限公司 | Temperature control equipment, motor refrigerant cold heat dissipation method, device, equipment and storage medium |
| CN112653293B (en) * | 2020-12-10 | 2022-03-18 | 珠海格力电器股份有限公司 | Temperature control equipment, motor refrigerant cold heat dissipation method, device, equipment and storage medium |
| CN112611120A (en) * | 2020-12-23 | 2021-04-06 | 南通常测机电设备有限公司 | Water chiller for new energy motor and adjusting method thereof |
| CN115183392A (en) * | 2022-07-08 | 2022-10-14 | 广东美的制冷设备有限公司 | Multi-split air conditioning system, heat dissipation control method thereof and computer readable storage medium |
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