CN203010850U - Control circuit of air conditioner outdoor fan and air conditioner - Google Patents
Control circuit of air conditioner outdoor fan and air conditioner Download PDFInfo
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- CN203010850U CN203010850U CN 201220737709 CN201220737709U CN203010850U CN 203010850 U CN203010850 U CN 203010850U CN 201220737709 CN201220737709 CN 201220737709 CN 201220737709 U CN201220737709 U CN 201220737709U CN 203010850 U CN203010850 U CN 203010850U
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Abstract
The utility model discloses a control circuit of an air conditioner outdoor fan and an air conditioner. The control circuit of the air conditioner outdoor fan and the air conditioner comprise a controller which is arranged in an air conditioner outdoor machine, a driving circuit and an outdoor fan, wherein a gauge which is used for detecting the wind direction of the environment is further arranged on the outdoor machine. A detection signal is generated by the gauge and is output to the controller, a control signal is generated by the controller according to the wind direction of the environment and is output to the driving circuit, and the rotating direction of the outdoor fan is adjusted through the driving circuit. According to the air conditioner, the running state of the air conditioner outdoor fan can be automatically adjusted according to the wind direction and wind speed of the external environment. By adjusting of the rotating direction and rotating speed of the air conditioner outdoor fan, natural resources can be fully utilized by a system, so that high-efficient running of the air conditioner is achieved while heat exchange efficiency is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of air conditioner and refrigeration engineering, specifically speaking relates to a circuit structure and adopt the air conditioner of this outdoor fan control circuit design that are used for implementing control to the outdoor fan of air conditioner.
Background
Most of the current air conditioner products include an indoor unit and an outdoor unit. The outdoor unit is responsible for cooling or heating, and the indoor unit is responsible for conveying cold air or hot air to the indoor to reach the effect of cooling or rising temperature.
In the process of cooling or heating operation of the outdoor unit, heat released by the heat exchanger needs to be rapidly dissipated to the air by the outdoor fan. For the traditional outdoor fan of the air conditioner, the turning directions are all fixed, namely, the air is sucked from the air inlet of the outdoor unit, and the air is discharged from the air outlet; the rotating speed of the outdoor fan is only controlled by the running condition of the air conditioner, and is not influenced by the external wind direction and the wind speed. The traditional control method of the outdoor fan of the air conditioner has the following defects:
(1) if the external environmental wind direction is opposite to the wind outlet direction of the outdoor fan, that is, the external wind blows to the air outlet of the outdoor unit, as shown in fig. 1, the wind volume passing through the heat exchanger is greatly reduced, the heat exchange effect of the outdoor unit is deteriorated, and the refrigeration or heating effect is affected;
(2) if the external environmental wind direction is opposite to the wind outlet direction of the outdoor fan, that is, the external wind blows to the air inlet of the outdoor unit, as shown in fig. 2, the wind passing through the heat exchanger may be sufficient as the environmental wind quantity increases, but at this time, the outdoor fan still operates, so that useless work is generated, and the energy is wasted.
Disclosure of Invention
An object of the utility model is to provide a can be according to the air direction automatic change air-conditioner outdoor fan control circuit that air-conditioner outdoor fan turned to realize the high-efficient operation of air conditioner.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
the outdoor fan control circuit of the air conditioner comprises a controller, a driving circuit and an outdoor fan which are arranged in an outdoor unit of the air conditioner, wherein a measuring instrument used for detecting the environmental wind direction is further arranged on the outdoor unit, the measuring instrument generates a detection signal and outputs the detection signal to the controller, the controller generates a control signal according to the environmental wind direction and outputs the control signal to the driving circuit, and the steering of the outdoor fan is adjusted through the driving circuit.
When the outdoor fan is a three-phase alternating-current fan, the outdoor fan can be connected with the frequency converter through a reversing switch in the driving circuit to receive a three-phase alternating-current power supply output by the frequency converter; the reversing switch receives a switch control signal output by the controller, and adjusts the steering of the outdoor fan by changing the phase sequence of the three-phase alternating-current power supply.
In order to realize the adjustment of the rotating speed of the outdoor fan and enable the rotating speed of the outdoor fan to be automatically adjusted according to the ambient wind speed so as to achieve the design purpose of reducing the power consumption of the whole air conditioner, the outdoor unit is further provided with a wind speed detection device, a wind speed detection signal is generated according to the ambient wind speed and is output to the controller, the controller is connected with the frequency converter, and the rotating speed of the outdoor fan is adjusted by changing the frequency of a three-phase alternating current power supply output by the frequency converter.
Preferably, the wind speed detection device is preferably built in the measuring instrument, that is, a wind speed/direction measuring instrument is selected and installed on the outdoor unit, so as to detect the environmental wind direction and the wind speed.
In order to ensure that the detection result generated by the measuring instrument is accurate and avoid being influenced by the air outlet of the outdoor fan, the measuring instrument is preferably installed outside the outdoor unit casing and on the top plate of the casing.
Preferably, the measuring instrument is preferably mounted at a middle portion of a top plate of the housing.
Based on above-mentioned air-conditioner outdoor fan control circuit, the utility model also provides an air conditioner, including indoor set and off-premises station be provided with controller, drive circuit and outdoor fan in the off-premises station still be provided with the measuring apparatu that is used for detecting the environment wind direction on the off-premises station, the measuring apparatu generates detection signal output to controller, the controller generates control signal output to drive circuit according to the environment wind direction, adjusts turning to of outdoor fan through drive circuit to realize the air-out direction of outdoor fan and along with the change of environment wind direction automatically regulated's design purpose, with the high-efficient operation of realization air conditioner.
Furthermore, the air outlet and the air inlet are respectively arranged on the front panel and the back panel of the casing on the outdoor unit.
Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model discloses an air conditioner can be according to the running state of external environment wind direction adjustment air conditioner outdoor fan, and messenger's system can make full use of natural resources, realizes the high-efficient operation of air conditioner. When the ambient wind direction is opposite to the air outlet wind direction of the traditional air conditioner, the outdoor fan is controlled to stop or reversely rotate, so that the air quantity can be prevented from being reduced, even the air quantity can be improved, and the heat exchanger can fully exchange heat; when the environment wind direction is opposite to the air outlet wind direction of the traditional air conditioner, the outdoor fan is controlled to stop or the rotating speed of the outdoor fan is reduced, the heat exchange efficiency is ensured, and meanwhile, the running power of the whole air conditioner can be reduced, and the efficient and energy-saving effects are achieved.
Other features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the invention, which is to be read in connection with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of the wind direction when the ambient wind direction is aligned with the wind outlet direction when the outdoor fan is aligned forwardly;
FIG. 2 is a schematic view of the wind direction when the ambient wind direction is consistent with the wind direction of the outlet wind when the outdoor fan rotates forward;
FIG. 3 is a schematic diagram of the wind direction when the ambient wind direction is not aligned with and consistent with the wind direction of the outlet wind when the outdoor fan rotates forward;
fig. 4 is a schematic view illustrating an installation position of an embodiment of a wind speed/direction measuring instrument on an outdoor unit of an air conditioner;
FIG. 5 is a top view of FIG. 4;
fig. 6 is a schematic circuit block diagram of an embodiment of an outdoor fan control circuit of an air conditioner according to the present invention;
FIG. 7 is a control flow diagram of one embodiment of controlling an air conditioner outdoor fan based on ambient wind direction and wind speed;
FIG. 8 is a waveform diagram illustrating the relationship between the ambient wind speed and the rotational speed of the outdoor fan when the outdoor fan is a three-stage speed-adjustable fan and the ambient wind blows from the inlet to the outlet of the outdoor fan;
fig. 9 is a waveform diagram of a corresponding relationship between ambient wind speed and rotational speed of the outdoor fan when the outdoor fan is a three-stage speed-adjustable fan and ambient wind blows from an air outlet of the outdoor fan to an air inlet.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the accompanying drawings.
The embodiment is directed at the current air conditioner, the air outlet direction of the outdoor unit of the air conditioner is fixed, and the outdoor environment wind direction has strong randomness, so that the heat exchange effect of the outdoor unit is influenced.
As shown in fig. 4, in order to realize the intelligent adjustment of the direction of the outdoor fan, in this embodiment, a measuring instrument 2 for detecting the environmental wind direction is added to the outdoor unit of the air conditioner, a detection signal representing the environmental wind direction is generated by the measuring instrument 2 and transmitted to the main control board in the outdoor unit, and then the main control program is used to determine the appropriate air outlet direction of the outdoor fan, so as to realize the direction change control of the outdoor fan.
For the current air conditioner, the air outlet 4 of the outdoor unit is generally disposed on the front panel 3 of the outdoor unit casing, as shown in fig. 4, the air inlet is generally disposed on the back panel of the outdoor unit casing, the outdoor fan 5 is installed in the casing, when the outdoor fan rotates forward, the air is sucked by the air inlet, and the air is discharged from the air outlet 4. In order to avoid the influence of the wind from the outdoor fan 5 on the measuring instrument 2, the measuring instrument 2 is preferably installed outside the outdoor unit casing and on the top plate 1 of the casing to ensure the accuracy of the detection of the ambient wind direction. In view of the overall appearance of the outdoor unit, the measuring instrument 2 is preferably installed at the middle of the top plate 1 of the casing, as shown in fig. 5.
Of course, the measuring instrument 2 may be installed in other parts of the outdoor unit, as long as it can ensure sufficient contact with the outdoor environment and avoid the air inlet and the air outlet of the outdoor unit, and the embodiment is not limited to the above example.
The wind direction detection signal detected and output by the measuring instrument 2 is transmitted to the controller on the outdoor unit main control panel, the controller generates a control signal for controlling the outdoor fan to turn according to the environmental wind direction, the control signal is output to the driving circuit, and then the driving control of the outdoor fan is realized through the driving circuit, so that the automatic adjustment of the air outlet direction of the outdoor fan is realized.
In order to enhance the heat exchange effect, when the ambient wind blows to the air outlet of the outdoor unit, that is, the ambient wind direction is opposite to the wind outlet direction when the outdoor fan rotates forward, for example, in the case of the right direction as shown in fig. 1, the outdoor fan is controlled to rotate backward, and the air is sucked from the air outlet and discharged from the air inlet of the outdoor unit. At this time, the ambient air and the air discharged by the outdoor fan are blown to the heat exchanger in the outdoor unit together, so that the air quantity passing through the heat exchanger is increased, and the heat exchange efficiency is improved. On the contrary, when the ambient wind blows toward the air inlet of the outdoor unit, that is, the ambient wind direction is opposite to the air outlet direction when the outdoor fan rotates forward, for example, in the same condition as shown in fig. 2, the outdoor fan is controlled to rotate forward, and the air is sucked from the air inlet of the outdoor unit and is exhausted from the air outlet. At the moment, the ambient wind blows to the heat exchanger in the outdoor unit, the outdoor fan absorbs the heat emitted by the heat exchanger and releases the heat to the outside atmosphere, and the heat exchange speed is accelerated through the double pipes.
In order to meet the reversing requirement of the outdoor fan, for the variable frequency air conditioner, a three-phase alternating current fan can be selected as the outdoor fan and used for radiating heat of the heat exchanger. As shown in fig. 6, in order to realize the driving control of the three-phase ac fan, the present embodiment designs a frequency converter and reversing switches K1 and K2 in the driving circuit. The three-phase alternating current power supply U, V, W output by the frequency converter is transmitted to the power supply end of the three-phase alternating current fan through reversing switches K1 and K2. The reversing switches K1 and K2 are preferably designed by using an ac contactor to perform a circuit, receive switch control signals generated and output by the controller according to the environmental wind direction, and further change the time sequence of a three-phase ac power supply applied to the three-phase ac fan by controlling the switching-on of the reversing switch K1 and the switching-off of the reversing switch K2 (or the switching-on of the reversing switch K2 and the switching-off of the reversing switch K1), so that the reversing control of the three-phase ac fan is realized.
In order to ensure safe power supply, two groups of alternating current contactors K1 and K2 need to be designed in an interlocking manner in circuit design, namely, a normally closed contact of an alternating current contactor K2 is connected in series in a coil power supply loop of an alternating current contactor K1, and a normally closed contact of an alternating current contactor K1 is connected in series in a coil power supply loop of an alternating current contactor K2, so that only one group of time sequence alternating current power supplies are transmitted to a power supply end of a three-phase alternating current fan at the same time, and the three-phase alternating current fan is controlled to rotate forwards or reversely.
In order to improve the heat exchange effect and reduce the power consumption of the outdoor fan, the outdoor unit of this embodiment is further provided with a wind speed detection device, which is preferably embedded in the measuring instrument 2, that is, the wind speed/direction measuring instrument is selected and installed on the top plate 1 of the outdoor unit casing, so as to meet the requirement of synchronous detection of the ambient wind direction and the ambient wind speed.
The wind speed detection signal detected and output by the wind speed/wind direction measuring instrument is transmitted to the outdoor unit controller, the controller generates a rotating speed control signal according to the wind speed, the rotating speed control signal is output to the frequency converter in the driving circuit, the frequency of the alternating current power supply output to the outdoor fan is changed by the frequency converter, and then the rotating speed of the outdoor fan is intelligently adjusted.
Of course, the outdoor fan may also adopt a dc fan to perform system design, and the phase sequence and the current magnitude of the power supply transmitted to the dc fan are changed by the driving circuit, so as to adjust the rotation direction and the rotation speed of the dc fan.
Based on the above-mentioned structural design of the outdoor unit of the air conditioner, a detailed description will be given below of a specific control method of the direction and the rotation speed of the outdoor fan of the air conditioner with reference to fig. 7.
And S701, controlling the air conditioner to start to operate, and selecting an operation mode, namely a cooling operation mode or a heating operation mode.
S702, starting a wind speed/wind direction measuring instrument, and detecting the wind direction and the wind speed of the outdoor environment;
in the present embodiment, it is preferable that the detection of the outdoor ambient wind direction is determined by using a component of the ambient wind speed V in the wind outlet direction when the outdoor fan is rotating in the normal direction, as shown in fig. 3. Setting an air outlet on the front panel of the outdoor unit casing and an air inlet on the back panel, of course, the air inlets may also be simultaneously set on the left and right side panels of the casing, setting the air outlet direction when the outdoor fan rotates forward (i.e. the outdoor fan sucks air through the air inlet of the outdoor unit and the corresponding outdoor fan rotates when the air outlet discharges air) as the direction of the X axis, and calculating the component V0 of the ambient wind speed V on the X axis, i.e. V0= V × cos α, where V is the absolute value of the ambient wind speed. If the component V0 is a negative value, it is determined that the ambient air is blown from the air outlet of the outdoor unit to the air inlet, i.e., the direction of the ambient air is opposite to the direction of the air outlet when the outdoor fan rotates forward. Fig. 1 shows a limit situation in which the ambient wind direction is directly opposite to the wind outlet direction when the outdoor fan rotates forward, that is, an included angle between the ambient wind direction and the wind outlet direction is 180 °, at this time, V0= -V, and the wind speed blowing to the outdoor unit is the maximum. If the component V0 is a positive value, it is determined that the ambient air is blown from the air inlet of the outdoor unit to the air outlet, i.e., the direction of the ambient air is opposite to the direction of the air outlet when the outdoor unit is rotating forward. Fig. 2 shows a limit condition that the ambient wind direction is consistent with the wind outlet direction when the outdoor fan rotates forward, that is, an included angle between the ambient wind direction and the wind outlet direction is 0 °, and at this time, V0= V.
The absolute value V of the component V0 is used in the present embodiment for the wind speed of the environmental wind blown into the outdoor unitFAnd (4) performing representation.
S703, determining the steering direction of the outdoor fan according to the environmental wind direction;
in this embodiment, in order to make full use of the ambient air to exchange heat with the heat exchanger in the outdoor unit, when detecting that the ambient air is blown to the air inlet from the air outlet of the outdoor unit, that is, when component V0 is a negative value, the outdoor fan is controlled to reverse, and air is sucked from the air outlet, and the air inlet exhausts air, so that the air outlet direction of the outdoor fan is opposite to the ambient air direction and blows to the heat exchanger together, thereby improving the heat exchange effect.
On the contrary, when it is detected that the ambient wind is blown from the air inlet of the outdoor unit to the air outlet, that is, the component V0 is a positive value, the outdoor fan is controlled to rotate forward, so that the outdoor fan sucks air from the air inlet, and the air outlet discharges air, that is, the air outlet direction is the X-axis direction shown in fig. 3, and at this time, the air outlet direction of the outdoor fan is opposite to the ambient wind direction, so that the heat exchange speed of the heat exchanger can be increased.
S704, determining the rotating speed of the outdoor fan according to the wind speed of the environment wind;
in this embodiment, the types of the outdoor fans selected by different air conditioners are different, some fans are selected by stepless speed change fans, some fans are selected by multistage speed regulation fans, and some fans are selected by single speed fans. Therefore, for different types of outdoor fans, the present embodiment proposes the following preferable speed regulation modes:
(1) when the outdoor fan is a stepless speed change fan, the rotating speed R of the outdoor fan can be calculated by the following formula:
when V isFWhen the content is less than or equal to A,
；
when V isFAnd when the pressure is larger than or equal to A, R =0, namely the outdoor fan is stopped.
Wherein,
a is a preset wind speed value passing through the surface of the heat exchanger to meet the heat exchange requirement of the heat exchanger of the outdoor unit, and the wind speed value A can be obtained through tests. As a preferred design scheme of this embodiment, when ambient wind blows from the air inlet of the outdoor unit to the air outlet, the value of a is preferably between 1.5m/s and 3.0 m/s; when the ambient air is blown to the air inlet from the air outlet of the outdoor unit, the value of A is preferably 4.5-6.0 m/s.
RHIs the maximum rotational speed of the outdoor fan; this value RHCan be obtained by searching a technical manual of the fan.
RLIs the minimum rotational speed of the outdoor fan; this value RLOr can be obtained by searching a technical manual of the fan.
Considering that the heat exchange requirement of the heat exchanger can be met only by utilizing the ambient wind even if the outdoor fan is not started under the condition that the outdoor ambient wind speed is larger, the embodiment is set as VFWhen the air temperature is more than or equal to A, namely the ambient air blown into the outdoor unit can meet the heat exchange requirement of the heat exchanger of the outdoor unit, the overall power consumption of the air conditioner is reduced by controlling the outdoor fan to stop, and the design requirement of energy conservation and consumption reduction is met.
(2) When the outdoor fan is a multi-stage speed regulation fan (namely, the outdoor fan is controlled to operate at a plurality of different rotating speeds by setting a plurality of gears), the following two rotating speed control strategies can be adopted:
one is as follows: firstly, the rotating speed R of the outdoor fan is calculated by using the rotating speed calculation formula of the stepless speed change fan in the step (1), and then the gear of the outdoor fan is determined according to the rotating speed R. Because the rotating speeds corresponding to different gears of the multistage speed regulation fan are different, if the calculated rotating speed R is just between two gears of wind speeds, the wind speed of the larger gear of the two gears is selected to operate, and the heat exchange requirement is fully ensured.
In the same way, when VFAnd when the power consumption is more than or equal to A, controlling the outdoor fan to stop so as to reduce the power consumption of the whole machine.
The second is that: the environment wind speed is divided into a plurality of intervals, and the outdoor fan is set to operate at different gears according to different intervals. Taking the three-level speed regulation fan as an example for specific explanation, namely, the outdoor fan can operate at three gears of high, medium and low, the specific control strategy is as follows:
if the ambient wind blows from the air inlet of the outdoor unit to the air outlet, that is, the component V0 is a positive value and the ambient wind speed is in an ascending trend, the absolute value V of the component of the ambient wind speed V in the X-axis direction is determined according to the absolute value V of the component of the ambient wind speed V in the X-axis directionFThe gear of the outdoor fan is determined as follows, and is shown in combination with fig. 8:
if the ambient wind speed is low, make VF≤V11，V11If the value is taken between 1.0 and 1.5m/s, setting the gear of the outdoor fan as a high gear, and controlling the outdoor fan to run at a high speed, wherein the rotating speed corresponding to the high gear can be taken within the range of 820 to 880 rpm;
if the ambient wind speed rises, make VFExceeds V11When is, i.e. V11<VF≤V12，V12If the value is taken between 1.5 and 2.0m/s, setting the gear of the outdoor fan as a middle gear, and controlling the outdoor fan to operate at a medium speed, wherein the rotating speed corresponding to the middle gear can be taken within the range of 650 to 720 rpm;
if the ambient wind speed continues to rise, the V is enabledFExceeds V12When is, i.e. V12<VF≤V13，V13If the value is taken between 2.0 and 3.0m/s, setting the gear of the outdoor fan as a low gear, and controlling the outdoor fan to operate at a low speed, wherein the rotating speed corresponding to the low gear can be taken within the range of 450 to 550 rpm;
if the ambient wind speed increases, make VFBeyond V13I.e. VF>V13And controlling the outdoor fan to stop, and directly utilizing the ambient wind to exchange heat for the heat exchanger.
If the ambient wind blows from the air inlet of the outdoor unit to the air outlet, but the ambient wind speed is in a descending trend, the rotating speed control strategy of the outdoor fan is as follows:
if the current outdoor fan is stopped, and VF>V14，V14If the value is between 1.5 and 2.0m/s, the outdoor fan is kept in a shutdown state;
if the ambient wind speed decreases, make VFDown to V14Then controlling the outdoor fan to start, and when V is15<VF≤V14，V15When the value is taken between 1.0 and 1.5m/s, controlling the outdoor fan to operate at a low gear and a low speed;
if the ambient wind speed continues to drop, the V is enabled16<VF≤V15，V16If the value is between 0.5 and 1.0m/s, controlling the outdoor fan to operate at a medium-gear medium speed;
if the ambient wind speed decreases, make VF≤V16And controlling the outdoor fan to run at high speed in high gear.
Thirdly, if the ambient wind blows from the air outlet of the outdoor unit to the air inlet, namely the component V0 is a negative value, and the ambient wind speed is in an ascending trend, the absolute value V of the component of the ambient wind speed V in the X-axis direction is determinedFThe gear of the outdoor fan is determined as follows, and is shown in combination with fig. 9:
when ambient wind speed is low, i.e. VF≤V21，V21When the value is taken between 4.0 and 4.5m/s, controlling the outdoor fan to operate at a high speed at a high level;
when the ambient wind speed rises, the V is enabled21<VF≤V22，V22When the value is taken between 4.5m/s and 5.0m/s, controlling the outdoor fan to operate at a medium-gear medium speed;
when the ambient wind speed continues to rise, the V is enabled22<VF≤V23，V23When the value is between 5.0 and 6.0m/s, controlling the outdoor fan to operate at a low gear and a low speed;
and when the ambient wind speed rises sufficiently, i.e. VF>V23When the heat exchanger is in use, the outdoor fan is controlled to stop, and the ambient wind is directly used for heat exchangeThe heat exchanger exchanges heat.
If the ambient wind blows from the air outlet of the outdoor unit to the air inlet and the ambient wind speed is in a descending trend, then
If the current outdoor fan is stopped, and VF>V24，V24When the value is between 4.5 and 5.0m/s, the outdoor fan is kept in a shutdown state, and ambient air is still used for heat exchange of the heat exchanger;
if the ambient wind speed decreases, make VFDown to V24Then the outdoor fan is controlled to start and is at V25<VF≤V24，V25When the value is between 4.0 and 4.5m/s, controlling the outdoor fan to operate at a low gear and a low speed;
when the ambient wind speed is reduced, the V is enabled to be26<VF≤V25，V26When the value is between 3.5 and 4.0m/s, controlling the outdoor fan to operate at a medium-gear medium speed;
and when the ambient wind speed drops to a lower level, i.e. VF≤V26And when the heat exchanger is in use, the outdoor fan is controlled to run at high speed at high level so as to ensure the heat exchange requirement of the heat exchanger.
In order to ensure the reliable and stable operation of the system, the following two points should be considered in the rotation speed control of the outdoor fan:
firstly, to prevent frequent switching of the rotational speed of the outdoor fan, V11Should not be less than V16，V12Should not be less than V15，V13Should not be less than V14，V21Should not be less than V26，V22Should not be less than V25，V23Should not be less than V24. If the outdoor fan is a multi-stage speed-regulating fan or a stepless speed-changing fan, the air speed is allowed to be changed only after the outdoor fan continuously operates for a period of time at a certain air speed.
Secondly, under the condition of reverse rotation of the outdoor fan, the critical condition value V of each interval is set21、V22、V23、V24、V25、V26Should be larger than the critical condition value V of each interval under the condition of positive rotation of the outdoor unit11、V12、V13、V14、V15、V16And at least 2-3 times greater, or even greater. This is mainly due to the following two factors:
a. when the ambient wind direction is opposite to the wind outlet direction when the outdoor fan rotates forwards, the effective wind quantity passing through the outdoor unit heat exchanger is smaller than the effective wind quantity when the ambient wind direction is opposite to the wind outlet direction when the outdoor fan rotates forwards;
b. the refrigerant flow of the outdoor heat exchanger is generally considered during refrigeration, namely when the air conditioner operates in a refrigeration mode, the refrigerant passes through the inner row and the outer row, and the outlet air and the refrigerant flow direction are opposite under the condition that the outdoor fan rotates forwards, and the heat exchange coefficient is large; and under the condition of reverse rotation of the outdoor fan, the flow direction of the outlet air is consistent with that of the refrigerant, and the heat exchange coefficient is small. Therefore, in order to meet the heat exchange requirement, the air quantity needs to be increased. Of course, this can be disregarded in the case of a single row of heat exchangers.
(3) When the outdoor fan is a single-speed fan, that is, the fan can only operate at a unique fixed rotation speed, the operation mode of the fan can be controlled according to the second control strategy of the multistage speed regulation fan in the step (2), the difference is that the judgment is performed under the conditions of shutdown and high-speed operation, and when the judgment is high, medium and low gears, the operation is performed according to the outdoor fan. Namely, it is
If the ambient wind blows from the air inlet of the outdoor unit to the air outlet, that is, the component V0 is a positive value, and the ambient wind speed is in an increasing trend, then
When ambient wind speed is low, i.e. VF≤V13，V13When the value is taken between 2.0m/s and 3.0m/s, controlling the outdoor fan to start to operate;
when the ambient wind speed rises, the V is enabledF>V13When the heat exchanger is in use, the outdoor fan is controlled to stop, and the ambient air is directly utilized to exchange heat for the heat exchanger;
if the ambient wind blows from the air inlet of the outdoor unit to the air outlet and the ambient wind speed is in a descending trend, the ambient wind speed is controlled to be lower than the air inlet of the outdoor unit
If the current outdoor fan is stopped, and VF>V14，V14If the value is between 1.5 and 2.0m/s, the outdoor fan is kept in a shutdown state;
if the ambient wind speed decreases, make VFDown to V14Controlling an outdoor fan to start and operate, and exchanging heat for the heat exchanger together with ambient wind;
thirdly, if the ambient wind blows from the air outlet of the outdoor unit to the air inlet, namely the component V0 is negative and the ambient wind speed is in an ascending trend, then
When the ambient wind speed is lower, VF≤V23，V23When the value is taken between 5.0m/s and 6.0m/s, controlling an outdoor fan to start to operate and operate at a fixed rotating speed;
when the ambient wind speed rises, the V is enabledF>V23When the outdoor unit is in use, the outdoor fan is controlled to stop, and the ambient air directly exchanges heat with the heat exchanger of the outdoor unit;
if the ambient wind blows from the air outlet of the outdoor unit to the air inlet and the ambient wind speed is in a descending trend, then
If the current outdoor fan is stopped, and VF>V24，V24If the value is between 4.5 and 5.0m/s, the outdoor fan is kept in a shutdown state;
if the ambient wind speed decreases, make VFDown to V24And controlling the outdoor fan to start and operate to blow air and exchange heat for the heat exchanger.
S705, judging whether a stop instruction is received or not, and if the stop instruction is not received, returning to the step S703 to circularly execute the steering and rotating speed control of the outdoor fan; and if a shutdown instruction is received, controlling the whole outdoor unit to shut down.
The embodiment aims at the working environment of the outdoor unit of the air conditioner, and the control strategy is designed for the rotating speed and the steering of the outdoor fan, so that the power consumption of the outdoor unit can be effectively reduced on the premise of meeting the heat exchange requirement of the heat exchanger of the outdoor unit, and the efficient operation of an air conditioner product is realized.
Of course, the above description is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an air-conditioner outdoor fan control circuit, is including setting up controller, drive circuit and the outdoor fan in the air-conditioner outdoor machine which characterized in that: the outdoor unit is also provided with a measuring instrument for detecting the environmental wind direction, the measuring instrument generates a detection signal and outputs the detection signal to the controller, the controller generates a control signal according to the environmental wind direction and outputs the control signal to the driving circuit, and the steering of the outdoor fan is adjusted through the driving circuit.
2. The outdoor fan control circuit of air conditioner according to claim 1, characterized in that: the outdoor fan is a three-phase alternating current fan, is connected with the frequency converter through a reversing switch in the driving circuit and receives a three-phase alternating current power supply output by the frequency converter; the reversing switch receives a switch control signal output by the controller, and adjusts the steering of the outdoor fan by changing the phase sequence of the three-phase alternating-current power supply.
3. The outdoor fan control circuit of air conditioner according to claim 2, characterized in that: the outdoor unit is also provided with a wind speed detection device which generates a wind speed detection signal according to the ambient wind speed and outputs the wind speed detection signal to the controller, the controller is connected with the frequency converter, and the rotating speed of the outdoor fan is adjusted by changing the frequency of the three-phase alternating current power supply output by the frequency converter.
4. The outdoor fan control circuit of claim 3, wherein: the wind speed detection device is arranged in the measuring instrument.
5. The outdoor fan control circuit of air conditioner according to any one of claims 1 to 4, wherein: the measuring instrument is arranged outside the outdoor unit casing and is positioned on the top plate of the casing.
6. The outdoor fan control circuit of air conditioner according to claim 5, characterized in that: the measuring instrument is arranged in the middle of the top plate of the machine shell.
7. An air conditioner, includes indoor set and off-premises station, be provided with controller, drive circuit and outdoor fan in the off-premises station, its characterized in that: the outdoor unit is also provided with a measuring instrument for detecting the environmental wind direction, the measuring instrument generates a detection signal and outputs the detection signal to the controller, the controller generates a control signal according to the environmental wind direction and outputs the control signal to the driving circuit, and the steering of the outdoor fan is adjusted through the driving circuit.
8. The air conditioner according to claim 7, wherein: the outdoor unit is also provided with a wind speed detection device which generates a wind speed detection signal according to the ambient wind speed and outputs the wind speed detection signal to the controller, and the controller controls the driving circuit to adjust the rotating speed of the outdoor fan.
9. The air conditioner according to claim 8, wherein: the wind speed detection device is arranged in the measuring instrument, and the measuring instrument is arranged outside the outdoor unit casing and is positioned on the top plate of the casing.
10. The air conditioner according to any one of claims 7 to 9, wherein: and the air outlet and the air inlet are respectively arranged on the front panel and the back panel of the shell on the outdoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220737709 CN203010850U (en) | 2012-12-28 | 2012-12-28 | Control circuit of air conditioner outdoor fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220737709 CN203010850U (en) | 2012-12-28 | 2012-12-28 | Control circuit of air conditioner outdoor fan and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203010850U true CN203010850U (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220737709 Expired - Fee Related CN203010850U (en) | 2012-12-28 | 2012-12-28 | Control circuit of air conditioner outdoor fan and air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN203010850U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317696A (en) * | 2018-02-10 | 2018-07-24 | 广东美的制冷设备有限公司 | Control method, device and the computer readable storage medium of air conditioner |
| CN109114750A (en) * | 2018-07-10 | 2019-01-01 | 青岛海尔空调器有限总公司 | Control method, device and the computer readable storage medium of air-conditioner outdoor unit |
| CN109282432A (en) * | 2018-09-19 | 2019-01-29 | 珠海格力电器股份有限公司 | Fan downwind starting control method and device and air conditioning unit |
| CN111322736A (en) * | 2020-03-10 | 2020-06-23 | 青岛海尔空调器有限总公司 | Air conditioner external unit control method and device and air conditioner system |
| CN111780351A (en) * | 2020-06-19 | 2020-10-16 | 宁波奥克斯电气股份有限公司 | Outdoor fan control method, device, air conditioner and storage medium |
| EP3547524A4 (en) * | 2016-11-28 | 2020-11-11 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | CURRENT CONVERSION DEVICE |
| CN111998514A (en) * | 2020-09-08 | 2020-11-27 | 佛山市顺德区美的电子科技有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
| CN112229038A (en) * | 2019-07-15 | 2021-01-15 | 青岛海尔空调器有限总公司 | Control method for air conditioner and air conditioner |
| CN115218406A (en) * | 2022-06-23 | 2022-10-21 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| CN116146514A (en) * | 2022-09-27 | 2023-05-23 | 上海莘汭驱动技术有限公司 | Fluid Dynamic State Adjustment Method Based on Axial Flow Fan |
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- 2012-12-28 CN CN 201220737709 patent/CN203010850U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3547524A4 (en) * | 2016-11-28 | 2020-11-11 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | CURRENT CONVERSION DEVICE |
| CN108317696A (en) * | 2018-02-10 | 2018-07-24 | 广东美的制冷设备有限公司 | Control method, device and the computer readable storage medium of air conditioner |
| CN109114750A (en) * | 2018-07-10 | 2019-01-01 | 青岛海尔空调器有限总公司 | Control method, device and the computer readable storage medium of air-conditioner outdoor unit |
| CN109282432A (en) * | 2018-09-19 | 2019-01-29 | 珠海格力电器股份有限公司 | Fan downwind starting control method and device and air conditioning unit |
| CN112229038A (en) * | 2019-07-15 | 2021-01-15 | 青岛海尔空调器有限总公司 | Control method for air conditioner and air conditioner |
| CN112229038B (en) * | 2019-07-15 | 2021-10-29 | 青岛海尔空调器有限总公司 | Control method of air conditioner and air conditioner |
| CN111322736A (en) * | 2020-03-10 | 2020-06-23 | 青岛海尔空调器有限总公司 | Air conditioner external unit control method and device and air conditioner system |
| CN111780351A (en) * | 2020-06-19 | 2020-10-16 | 宁波奥克斯电气股份有限公司 | Outdoor fan control method, device, air conditioner and storage medium |
| CN111780351B (en) * | 2020-06-19 | 2022-07-12 | 宁波奥克斯电气股份有限公司 | Outdoor fan control method, device, air conditioner and storage medium |
| CN111998514A (en) * | 2020-09-08 | 2020-11-27 | 佛山市顺德区美的电子科技有限公司 | Control method of air conditioner, air conditioner and computer readable storage medium |
| CN115218406A (en) * | 2022-06-23 | 2022-10-21 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| CN116146514A (en) * | 2022-09-27 | 2023-05-23 | 上海莘汭驱动技术有限公司 | Fluid Dynamic State Adjustment Method Based on Axial Flow Fan |
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