CN108168018B - Heating control method for air conditioner - Google Patents
Heating control method for air conditioner Download PDFInfo
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- CN108168018B CN108168018B CN201711124351.3A CN201711124351A CN108168018B CN 108168018 B CN108168018 B CN 108168018B CN 201711124351 A CN201711124351 A CN 201711124351A CN 108168018 B CN108168018 B CN 108168018B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a heating control method of an air conditioner, wherein the air conditioner has a heating mode, and the control method comprises the following steps: when the air conditioner works in a heating mode and receives an instruction of starting an energy-saving function, continuously detecting the ambient temperature Ti of the indoor environment where an indoor unit of the air conditioner is located, and adjusting the rotating speed n of an internal fan of the indoor unit and the frequency f of a compressor of an outdoor unit of the air conditioner according to the ambient temperature Ti; wherein the rotation speed n of the inner fan is increased along with the increase of the ambient temperature Ti, and the frequency f of the compressor is reduced along with the increase of the ambient temperature Ti. The control method controls the rotating speed of an inner fan of the indoor unit to correspondingly increase along with the increase of the indoor temperature, and reduces the frequency of the compressor of the outdoor unit, thereby increasing the air volume of indoor heat exchange, reducing the heat exchange pressure of the whole heat exchange system of the air conditioner in the refrigeration process, and reducing the energy consumption of the compressor, so that the integral power of the air conditioner is correspondingly reduced.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a control method for controlling the heating operation of an air conditioner.
Background
At present, the energy-saving subject of the air-conditioning industry is always a hot subject of research, and national macro policy, air-conditioning manufacturers and various research institutions encourage the research of energy conservation and emission reduction. Most of the energy-saving technologies of the existing air conditioners relate to the energy-saving technologies of various elements of the air conditioner, such as a compressor and a motor, and various energy-saving technologies in the aspects of air conditioning refrigeration, but meanwhile, the requirements of users on household air conditioners are more various, the energy-saving technology only in the refrigeration operation cannot meet the requirements of the air conditioner in different seasons, and an effective energy-saving method is also lacked in the aspects of heating and energy saving.
Disclosure of Invention
The invention aims to provide a heating control method of an air conditioner with lower energy consumption.
A further object of the present invention is to improve the heat exchange efficiency and comfort of air conditioning heating.
In particular, the present invention provides a heating control method of an air conditioner having a heating mode, the control method comprising:
when the air conditioner works in the heating mode and receives an instruction of starting an energy-saving function, continuously detecting the ambient temperature Ti of the indoor environment where an indoor unit of the air conditioner is located, and adjusting the rotating speed n of an internal fan of the indoor unit and the frequency f of a compressor of an outdoor unit of the air conditioner according to the ambient temperature Ti; wherein
The inner fan speed n increases with an increase in the ambient temperature Ti, and the compressor frequency f decreases with an increase in the ambient temperature Ti.
Further, after the air conditioner works in the heating mode and the energy-saving function is started, controlling the rotating speed n of the inner fan to linearly increase along with the increase of the ambient temperature Ti; and
controlling the compressor frequency f of the outdoor unit to linearly decrease as the ambient temperature Ti increases.
Further, the calculation formula of the rotation speed change of the rotation speed n of the inner fan is as follows:
n＝int(a×Ti+b)
wherein n is a numerical value taking the rotating speed per minute as a unit, Ti is a numerical value taking the centigrade degree as a unit, a is a rotating speed coefficient with the value range of 20.4-26.0, and b is a first calibration coefficient with the value range of 500-650.
Further, the calculation formula of the frequency variation of the compressor frequency f is as follows:
f＝A×Ti+B
wherein f is a numerical value in hertz, Ti is a numerical value in centigrade, A is a frequency coefficient with a value range of-2.2 to-1.2, and B is a second calibration coefficient with a value range of 96 to 107.
Further, when the ambient temperature Ti is greater than a preset upper limit temperature threshold Tmax of the ambient temperature, the ambient temperature Ti in the rotation speed calculation formula and the frequency calculation formula is selected as the upper limit temperature threshold Tmax; and is
Tmax is a number in degrees celsius.
Further, when the ambient temperature Ti is less than a lower limit temperature threshold Tmin of a preset ambient temperature, the ambient temperature Ti in the rotation speed calculation formula and the frequency calculation formula is selected as the lower limit temperature threshold Tmin; and is
Tmin is a numerical value in degrees celsius.
Further, the control method further includes: and when the air conditioner works in the heating mode and receives an instruction of starting the energy-saving function, the current ambient temperature Ti is obtained again at intervals of a preset updating period.
Further, the control method further includes: and when the air conditioner works in the heating mode and the energy-saving function is started, if the indoor unit receives a control instruction of changing the temperature and/or the wind speed, the energy-saving function is automatically closed.
The control method controls the phase linear rising of the rotating speed of the inner fan of the indoor unit along with the rising of the indoor environment temperature, so that the air volume of indoor heat exchange is gradually increased, and the heat exchange pressure of the whole heat exchange system of the air conditioner in the refrigeration process is reduced.
Furthermore, the control method also controls the frequency of the compressor of the outdoor unit to linearly decrease along with the increase of the indoor environment temperature, so that the overall power of the air conditioner is correspondingly reduced, and the overall heat exchange energy consumption of the indoor unit is reduced.
Further, although the frequency of the compressor is reduced, the heat exchange air volume is continuously increased, so that the heating quantity can be basically ensured not to be obviously changed once the heat exchange air volume is reduced and increased, and the heating effect of the air conditioner is ensured.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic flow chart diagram of a control method according to one embodiment of the present invention;
FIG. 2 is a schematic effect diagram of a control method according to one embodiment of the invention;
FIG. 3 is a graphical illustration of the variation of the inner fan speed and compressor frequency with respect to ambient temperature for a control method according to one embodiment of the present invention.
Detailed Description
An air conditioner may generally include an indoor unit and an outdoor unit. The indoor unit may generally include an inner fan and an indoor heat exchanger. The outdoor unit may generally include a compressor, a four-way valve, a throttle device, an outdoor fan, an outdoor heat exchanger, and the like. Generally, when an air conditioner is operated in a cooling mode, an indoor heat exchanger serves as an evaporator and an outdoor heat exchanger serves as a condenser. Furthermore, when the air conditioner works in a heating mode, the flow direction of the refrigerant can be changed by reversing the four-way valve of the outdoor unit, so that the outdoor heat exchanger becomes an evaporator to absorb heat, and the indoor heat exchanger becomes a condenser to release heat.
The control method of the invention can be used for the air conditioner which runs in the heating mode. The air conditioner can have a default energy-saving mode, and can also realize an energy-saving function under the control of the control method. That is, the air conditioner may have an original energy saving function instruction, or may use a control instruction for starting the control method as an instruction for starting the energy saving function.
Specifically, the control method comprises the steps of continuously detecting the ambient temperature Ti of the indoor environment where an indoor unit of the air conditioner is located after the air conditioner works in a heating mode and receives an instruction of starting an energy-saving function, and adjusting the rotating speed n of an internal fan of the indoor unit and the frequency f of a compressor of an outdoor unit of the air conditioner according to the ambient temperature Ti. In particular, the inner fan speed n increases with increasing ambient temperature Ti and the compressor frequency f decreases with increasing ambient temperature Ti.
That is, after the indoor unit operates in the heating mode, the indoor ambient temperature is higher and higher. The control method controls the rotating speed of the inner fan of the indoor unit to be correspondingly higher and higher, so that the air volume for indoor heat exchange is increased, and the heat exchange pressure of the whole heat exchange system of the air conditioner in the refrigeration process is reduced. Accordingly, unlike some prior art control methods that positively correlate the rotational speed of the inner fan with the frequency of the outdoor compressor, and inevitably correspond to the high-speed operation of the indoor fan when the compressor is operated at high frequency, the control method also controls the frequency of the outdoor compressor to be reduced, so that the overall power of the air conditioner is correspondingly reduced.
Fig. 1 is a schematic flow chart of a control method according to an embodiment of the invention. Referring to fig. 1, the control method specifically includes:
and step S100, the air conditioner enters a heating mode, and the energy-saving function is started.
Step S102, obtaining an ambient temperature Ti.
Step S104, judging whether the environment temperature Ti is larger than or equal to the upper limit temperature threshold Tmax; if yes, go to step S106; if not, go to step S108.
And step S106, selecting the environment temperature Ti as an upper limit temperature threshold Tmax.
Step S108, judging whether the ambient temperature Ti is less than or equal to a lower limit temperature threshold Tmin; if yes, go to step S110; if not, go to step S112.
Step S110; the ambient temperature Ti is selected as the lower temperature threshold Tmin.
And step S112, adjusting the rotating speed n of the internal fan according to the ambient temperature Ti.
And step S114, adjusting the frequency f of the compressor according to the ambient temperature Ti.
Step S116, judging whether the rotation speed n of the internal fan and the frequency f of the compressor keep an updating period unchanged; if yes, returning to execute the step S102; if not, go to step S118.
In step S118, the current operation state is maintained.
Step S120, whether the air conditioner receives a control instruction for changing heating temperature and/or air supply speed or not; if yes, go to step S122; if not, the process continues to step S118.
And step S122, exiting the energy-saving function.
Fig. 2 is a schematic effect diagram of a control method according to an embodiment of the present invention.
Referring to fig. 2, the indoor unit performing energy-saving heating by using the control method of the present invention can reduce the system power to a certain extent in a short heating operation time (after 10 minutes or more). Particularly, when the indoor unit is controlled by the control method to perform heating operation for a long time (greater than or equal to 30 minutes), the system power is obviously reduced, namely, when the indoor unit is started for a period of time and enters stable operation, the system power is greatly reduced, and the energy consumption required by heating is obviously reduced. Although the motor power is correspondingly increased due to the increase of the rotating speed of the inner fan of the indoor unit, the power of the motor of the inner fan is very small, generally only 10-50W, and the part of the air conditioner power reduction caused by the reduction of the pressure of the whole heat exchange system and the reduction of the frequency of the compressor is far larger than the part of the air conditioner motor power increase, so that the air conditioner power can be reduced on the whole, and the energy-saving effect of the air conditioner is greatly enhanced.
Further, although the frequency of the compressor is reduced, the heat exchange air volume is continuously increased, so that the heating quantity can be basically ensured not to be obviously changed once the heat exchange air volume is reduced and increased, and the heating effect of the air conditioner is ensured.
FIG. 3 is a graphical illustration of the variation of the inner fan speed and compressor frequency with respect to ambient temperature for a control method in accordance with one embodiment of the present invention.
Referring to fig. 3, in some embodiments of the present invention, when the air conditioner operates in the heating mode and the energy saving function is turned on, the control method shown in steps S112 and S114 may specifically be: the rotation speed n of the inner fan is controlled to linearly increase with the increase of the ambient temperature Ti, and the frequency f of the compressor of the outdoor unit is controlled to linearly decrease with the increase of the ambient temperature Ti.
Specifically, the calculation formula of the rotation speed change of the rotation speed n of the inner fan is as follows:
n＝int(a×Ti+b)
wherein n is a numerical value in units of rotation speed per minute (namely rmp), Ti is a numerical value in units of centigrade, a is a rotation speed coefficient with a value range of 20.4-26.0, and b is a first calibration coefficient with a value range of 500-650. int is a function that rounds the value down to the nearest integer.
Further, in some embodiments of the present invention, the control method may further include: when the ambient temperature Ti is less than 15 ℃, the value of the rotation speed coefficient a is preferentially selected to be a value with a value range close to the lower limit. For example a speed factor of less than 23.5, in particular 20.4, 22.1, 23.0, etc. The value of the first calibration coefficient b is preferably selected to be a value whose value range is close to the lower limit, for example, the value of the first calibration coefficient is smaller than 575, specifically, 550, 560, 570, and the like. When the ambient temperature Ti is more than or equal to 15 ℃, the value of the rotation speed coefficient a is preferentially selected to be a value with a value range close to the upper limit. Such as a speed factor greater than or equal to 23.5. Specifically, the examples include 24.0, 24.7, 25.2, and 26.0. The value of the first calibration coefficient b is preferably selected to be a value whose value range is close to the upper limit, for example, a rotation speed coefficient greater than or equal to 575, specifically, 600, 630, 650, and the like. That is, when the indoor ambient temperature is low (Ti is less than 15 ℃), to ensure the outlet air temperature, the rotation speed of the air conditioner indoor unit can be controlled to be kept at a higher speed value which is not too high and is changed slowly, thereby avoiding the discomfort of the user. Further, when the indoor environment temperature is high (Ti is greater than or equal to 15 ℃), the energy-saving effect can be ensured as much as possible by properly increasing the rotating speed of the inner fan, so that the pressure of the whole heat exchange system is reduced, and energy conservation is realized.
Further, the calculation formula of the frequency variation of the compressor frequency f is:
f＝A×Ti+B
wherein f is a numerical value in hertz, A is a frequency coefficient with a value range of-2.2 to-1.2, B is a second calibration coefficient with a value range of 96 to 107, and the precision of the frequency f of the press can be one bit (namely 0.1) behind a decimal point.
Further, in some embodiments of the present invention, the control method may further include: when the ambient temperature Ti is less than 15 ℃, the value of the frequency coefficient A is preferentially selected to be a value with a value range close to the upper limit. For example, a frequency coefficient greater than-1.7, specifically-1.5, -1.3, -1.2, etc. The value of the second calibration coefficient B is preferably selected to be a value whose value range is close to the upper limit, for example, a second calibration coefficient greater than 101, specifically 105, 106, 107, and the like. When the ambient temperature Ti is greater than or equal to 15 ℃, the value of the frequency coefficient a is preferably selected to be a value whose value range is close to the lower limit, for example, a frequency coefficient less than or equal to-1.7, specifically, such as-2.2, -2.0, -1.9, etc. The value of the second calibration coefficient B is preferably selected to be a value whose value range is close to the lower limit, for example, the value of the second calibration coefficient is less than or equal to 101, specifically, 96, 97, 99, and the like. That is, when the indoor ambient temperature is low (Ti is less than 15 ℃), the frequency of the air conditioning compressor is kept at a low frequency value, but not low enough, so as to ensure the heating capacity while reducing the energy consumption. Further, when the indoor ambient temperature is high (Ti is 15 ℃ or higher), the frequency of the press can be appropriately adjusted downward to maximize the energy saving effect. Because the ambient temperature is higher at this moment, and interior fan is controlled to have higher rotational speed relatively, consequently the heating capacity of indoor set can not change by a wide margin this moment, and the user can not produce uncomfortable sense.
In some embodiments of the present invention, the control method in steps S104 to S106 may specifically be that when the ambient temperature Ti is greater than a preset upper limit temperature threshold Tmax of the ambient temperature, the ambient temperature Ti in the rotation speed calculation formula and the frequency calculation formula is selected as the upper limit temperature threshold Tmax. Specifically, Tmax is a number in degrees celsius and may be any value between 25 and 35, such as 25, 30, 35, etc. That is, the upper temperature threshold may be 25 ℃, 30 ℃, 35 ℃ or the like. Preferably, the upper threshold may be selected to be 30 ℃. At this time, when the ambient temperature rises to 30 ℃ or exceeds 30 ℃, the ambient temperature value Ti for adjusting the rotation speed of the inner fan and the frequency of the compressor may be directly selected to be 30.
In some embodiments of the present invention, the control method in steps S108 to S110 may specifically be that when the ambient temperature Ti is less than a preset lower limit temperature threshold Tmin of the ambient temperature, the ambient temperature Ti in the rotation speed calculation formula and the frequency calculation formula is selected as the lower limit temperature threshold Tmin. Specifically, Tmin is a numerical value in degrees celsius, and may be any value between 0 and 10, such as 3, 5, 7, etc. That is, the lower temperature threshold may be 3 ℃, 5 ℃, 7 ℃ or the like. Preferably, the lower threshold may be selected to be 5 ℃. At this time, when the ambient temperature is decreased to 5 ℃ or less than 5 ℃, the ambient temperature value Ti for adjusting the rotation speed of the inner fan and the frequency of the compressor may be directly selected to be 5.
The upper limit temperature threshold value of the invention is set to ensure that the rotating speed of the indoor unit of the air conditioner does not exceed the rotating speed corresponding to the maximum noise of the indoor unit. The lower limit temperature threshold value is set to ensure that the frequency of the compressor is not too high, and the running frequency of the compressor is prevented from exceeding the normal working frequency range of the compressor, so that the service life of the compressor is prolonged.
The control method of the invention ensures that the lower the rotating speed of the indoor unit in heating operation, the higher the air outlet temperature of the indoor unit in the same indoor environment temperature; the higher the rotating speed of the indoor unit is, the lower the outlet air temperature is. That is, when the indoor environment temperature Ti is low, the rotating speed of the indoor unit is relatively low, and at the moment, the air outlet temperature is high, so people cannot feel cold wind. When the indoor environment temperature Ti is high, the rotating speed of the indoor unit is relatively high, and at the moment, the air outlet temperature of the air conditioner is relatively low (on the premise that the indoor environment temperature is the same), but people still have no cold wind blowing feeling due to the fact that the indoor environment temperature Ti is high. That is to say, along with the increase of the indoor environment temperature, the rotating speed of the indoor unit is increased linearly and gradually, the air outlet temperature of the air conditioner is basically not changed greatly in a certain continuous time period, the feeling of blowing cold air is avoided for users, and the heating comfort is improved.
In some embodiments of the invention, the control method further comprises: when the air conditioner works in a heating mode and receives an instruction for starting the energy-saving function, the current ambient temperature Ti is obtained again at intervals of a preset updating period. Specifically, one update cycle in step S116 may be any time value between 5S and 1 min. For example, 10s, 20s, 30s, 40s, 50s, etc. may be used. Since a large abrupt change in the indoor ambient temperature is unlikely to occur within a period of, for example, 30s, a large abrupt change in the internal fan rotation speed and the compressor frequency is unlikely to occur. Therefore, the rotating speed of the inner fan is ensured to be gradually and slowly changed, and the attention of a user cannot be attracted.
In some embodiments of the present invention, when the air conditioner operates in the heating mode and the energy saving function is turned on, if the indoor unit receives a control command to change the temperature and/or change the wind speed, the energy saving function is automatically turned off. That is, through step S120, when the user does not satisfy the heat exchange efficiency of the air conditioner under the energy saving function, the desired heat exchange temperature and the air blowing intensity may be set through manual adjustment. At the moment, the air conditioner can automatically stop the energy-saving function without additional operation of a user, so that the heat exchange intensity required by the user can be achieved in the shortest time, the air conditioner can continuously run, and different requirements of the user are met.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (5)
1. A heating control method of an air conditioner having a heating mode, the control method comprising:
when the air conditioner works in the heating mode and receives an instruction of starting an energy-saving function, continuously detecting the ambient temperature Ti of the indoor environment where an indoor unit of the air conditioner is located, and adjusting the rotating speed n of an internal fan of the indoor unit and the frequency f of a compressor of an outdoor unit of the air conditioner according to the ambient temperature Ti; wherein
The inner fan speed n increases with increasing ambient temperature Ti and the compressor frequency f decreases with increasing ambient temperature Ti, wherein,
when the air conditioner works in the heating mode and the energy-saving function is started, controlling the rotating speed n of the inner fan to increase linearly along with the increase of the ambient temperature Ti; and
controlling the compressor frequency f of the outdoor unit to linearly decrease as the ambient temperature Ti increases, wherein,
the calculation formula of the rotating speed change of the rotating speed n of the inner fan is as follows:
n＝int(a×Ti+b)
wherein n is a value in units of revolutions per minute, Ti is a value in degrees Celsius, a is a rotation rate coefficient ranging from 20.4 to 26.0, b is a first calibration coefficient ranging from 500 to 650, and
the calculation formula of the frequency change of the compressor frequency f is as follows:
f＝A×Ti+B
wherein f is a numerical value in hertz, Ti is a numerical value in centigrade, A is a frequency coefficient with a value range of-2.2 to-1.2, and B is a second calibration coefficient with a value range of 96 to 107.
2. The control method according to claim 1, wherein
When the ambient temperature Ti is greater than a preset upper limit temperature threshold Tmax of the ambient temperature, selecting the ambient temperature Ti in the rotating speed calculation formula and the frequency calculation formula as the upper limit temperature threshold Tmax; and is
Tmax is a number in degrees celsius.
3. The control method according to claim 1, wherein:
when the ambient temperature Ti is smaller than a lower limit temperature threshold Tmin of a preset ambient temperature, selecting the ambient temperature Ti in the rotating speed calculation formula and the frequency calculation formula as the lower limit temperature threshold Tmin; and is
Tmin is a numerical value in degrees celsius.
4. The control method according to claim 1, further comprising:
and when the air conditioner works in the heating mode and receives an instruction of starting the energy-saving function, the current ambient temperature Ti is obtained again at intervals of a preset updating period.
5. The control method according to claim 1, further comprising:
and when the air conditioner works in the heating mode and the energy-saving function is started, if the indoor unit receives a control instruction of changing the temperature and/or the wind speed, the energy-saving function is automatically closed.
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| CN111976413B (en) * | 2019-05-21 | 2022-03-22 | 长城汽车股份有限公司 | Vehicle air conditioner control device and method, vehicle air conditioner and vehicle |
| CN110332668B (en) * | 2019-07-12 | 2021-06-11 | 宁波奥克斯电气股份有限公司 | Heating mode control method and system and air conditioner |
| CN110329037B (en) * | 2019-07-30 | 2020-12-22 | 青岛海立电机有限公司 | Control method of parking air conditioner |
| CN111023428B (en) * | 2019-12-26 | 2022-01-25 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
| CN114576826B (en) * | 2020-11-30 | 2023-11-07 | 广东美的制冷设备有限公司 | Operation control method and device for air conditioner, air conditioner and storage medium |
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| CN1341830A (en) * | 2000-09-04 | 2002-03-27 | 煜丰科技股份有限公司 | Control method capable of utilizing tube discharge temp. to control air-conditioner energy and its equipment |
| CN106594963A (en) * | 2016-11-04 | 2017-04-26 | 珠海格力电器股份有限公司 | Air conditioner control method and control device and air conditioner |
| CN106765982A (en) * | 2017-01-09 | 2017-05-31 | 美的集团股份有限公司 | Air conditioner chamber's inner blower control method and device |
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