CN107677006B - Control method and system of air conditioner under low-humidity heating working condition - Google Patents
Control method and system of air conditioner under low-humidity heating working condition Download PDFInfo
- Publication number
- CN107677006B CN107677006B CN201710866972.2A CN201710866972A CN107677006B CN 107677006 B CN107677006 B CN 107677006B CN 201710866972 A CN201710866972 A CN 201710866972A CN 107677006 B CN107677006 B CN 107677006B
- Authority
- CN
- China
- Prior art keywords
- frequency
- compressor
- opening degree
- target
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000010438 heat treatment Methods 0.000 title claims abstract description 58
- 230000007613 environmental effect Effects 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 21
- 230000007704 transition Effects 0.000 claims description 26
- 230000001133 acceleration Effects 0.000 claims description 13
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 43
- 238000006243 chemical reaction Methods 0.000 description 15
- 239000010687 lubricating oil Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/112—Fan speed control of evaporator fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioners, in particular to a control method and a control system of an air conditioner under a low-humidity heating working condition. The invention aims to solve the problem that the quick heating effect is poor due to long frequency rising time in the conventional starting frequency rising control method of the air conditioner. To this end, the control method of the present invention includes: acquiring the environmental humidity; when the environmental humidity is not greater than the set humidity, adjusting the expansion valve to a first target opening degree; starting the outer fan in the process of adjusting the expansion valve, and accelerating to a first target rotating speed; and starting the compressor at the same time, before or after the speed of the external fan is increased, and continuously increasing the frequency in stages according to a plurality of set speeds. The control method can greatly shorten the frequency rising time of the compressor while ensuring the normal oil return of the compressor, thereby achieving the purpose of rapid heating, improving the comfort of the air conditioner and improving the user experience.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control system of an air conditioner under a low-humidity heating working condition.
Background
With the increasing living standard, the requirements of people on the quality of life are higher and higher, and the requirements are particularly obvious on household appliances. Taking an air conditioner as an example, in order to meet the requirement of a user for quick heating and bring more comfortable use experience, the existing air conditioner can generally make the compressor quickly increase the frequency to a higher frequency for operation when the air conditioner is just started. When the compressor is operated, refrigerant in the compressor is rapidly discharged to circulate in the pipe system. In the circulation process, the lubricating oil is discharged out of the compressor along with the refrigerant and enters the pipeline, and the dynamic balance of the lubricating oil in the whole system can be maintained only if the discharged part of the lubricating oil smoothly returns to the compressor (namely, oil return), otherwise, the compressor is damaged due to oil shortage. Most of air conditioners in the market at present adopt an arrangement mode of combining an oil separator and an oil return capillary tube, and lubricating oil discharged from a compressor is separated out through the oil separator and then returns to the compressor through the oil return capillary tube. However, in the case of the inverter air conditioner, as the operating frequency of the compressor increases, the discharge speed/velocity of the lubricating oil becomes faster and faster, and when the discharge speed/velocity of the lubricating oil exceeds the maximum oil return speed/velocity of the oil return capillary tube, the oil shortage phenomenon is easily generated. Therefore, in order to ensure normal oil return, during the process of rapidly raising the frequency of the compressor to a high frequency, the compressor is usually forced to operate for a period of time at a certain fixed frequency (oil return frequency), and the frequency raising is continued after the oil return is stable.
Although normal oil return is guaranteed by the arrangement mode, the compressor is forced to continuously run for a period of time on the oil return frequency, so that the frequency rising time of the compressor is too long in the process of quick heating of the air conditioner during starting, the speed of the compressor reaching the maximum working frequency is slowed down, the time for quick heating after the air conditioner is started is increased, the effect of quick heating of the air conditioner is influenced, and poor use experience is brought to a user. That is, the conventional method for controlling the frequency rise of the air conditioner during starting has the problem of poor quick heating effect due to long frequency rise time.
Accordingly, there is a need in the art for a new control method of an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem of the prior art that the quick heating effect is poor due to the long frequency-raising time in the start-up frequency-raising control method of the air conditioner, the invention provides a control method of the air conditioner under the low-humidity heating working condition, which comprises the following steps:
acquiring the environmental humidity;
when the environmental humidity is not greater than the set humidity, adjusting the opening degree of an expansion valve of the air conditioner to a first target opening degree;
in the process of adjusting the opening degree of the expansion valve to the first target opening degree, starting an external fan of the air conditioner, and accelerating to a first target rotating speed according to a set acceleration;
starting a compressor of the air conditioner at the same time, before or after the outer fan starts to increase the speed;
and continuously increasing the frequency of the compressor in stages according to a plurality of increasing frequency speeds.
In a preferable technical solution of the control method of the air conditioner under the low-humidity heating working condition, the control method further includes:
after the frequency is continuously increased in stages, judging whether the frequency of the compressor reaches a first target frequency;
stopping the compressor from increasing frequency when the compressor frequency reaches the first target frequency.
In a preferable embodiment of the method for controlling an air conditioner under the low-humidity heating condition, the step of "adjusting an opening degree of an expansion valve of the air conditioner to a first target opening degree" further includes:
reducing the opening degree of the expansion valve to a reference opening degree according to a set valve closing speed;
when the expansion valve opening degree reaches the reference opening degree, the expansion valve opening degree is increased to the first target opening degree at a set valve opening speed.
In a preferable embodiment of the method for controlling an air conditioner under the low-humidity heating condition, the step of "starting an external fan of the air conditioner while adjusting the opening degree of the expansion valve to the first target opening degree" further includes:
and when the opening degree of the expansion valve reaches the reference opening degree, starting the outer fan.
In a preferred technical solution of the control method of the air conditioner under the low-humidity heating condition, the step of "starting the compressor of the air conditioner while, before, or after the speed of the external air blower starts to increase" further includes:
and starting a compressor of the air conditioner while the outer fan starts to increase the speed.
In a preferred embodiment of the method for controlling an air conditioner under the low-humidity heating condition, "step of stepping and continuously increasing the frequency of the compressor according to a plurality of set speeds" further includes:
enabling the compressor to perform frequency boosting according to a first frequency boosting speed;
judging whether the frequency of the compressor reaches a transition frequency;
when the frequency of the compressor reaches the transition frequency, the compressor is enabled to carry out frequency raising according to a second frequency raising speed;
wherein the transition frequency is less than the first target frequency.
In a preferred technical solution of the control method of the air conditioner under the low-humidity heating working condition, the first frequency increasing speed is greater than the second frequency increasing speed; and/or the first target frequency is a maximum operating frequency of the compressor; and/or the first target rotating speed is the maximum working rotating speed of the outer fan; and/or the first target opening degree is an expansion valve opening degree matching the first target frequency, and/or the set humidity is 60%.
In a preferable technical solution of the control method of the air conditioner under the low-humidity heating working condition, the control method further includes:
acquiring an environmental parameter;
when the environmental parameter reaches a target parameter, the compressor is subjected to frequency reduction to a second target frequency; and is
Reducing the rotating speed of the outer fan to a second target rotating speed; and is
Decreasing the expansion valve opening to a second target opening;
the environment parameter is an environment temperature or the environment humidity, and the target parameter is a target temperature or a target humidity correspondingly.
The invention also provides a control system of the air conditioner under the low-humidity heating working condition, which comprises the following components:
the acquisition module is used for acquiring the environmental humidity;
a first control module, configured to decrease an opening degree of an expansion valve of the air conditioner to a reference opening degree at a set valve closing speed when the ambient humidity is not greater than a set humidity, and increase the opening degree of the expansion valve to a first target opening degree at a set valve opening speed when the opening degree of the expansion valve reaches the reference opening degree;
the second control module is used for starting the outer fan and accelerating the outer fan to a first target rotating speed according to a set acceleration when the opening degree of the expansion valve reaches the reference opening degree;
the third control module is used for starting a compressor of the air conditioner while the external fan starts to increase the speed, continuously increasing the frequency of the compressor in stages according to a plurality of set speeds, and stopping increasing the frequency of the compressor when the frequency of the compressor reaches a first target frequency;
and the judging module is used for judging whether the environment humidity is not greater than the set humidity, whether the expansion valve reaches the reference opening degree, whether the outer fan starts to increase the speed and whether the compressor frequency reaches the first target frequency.
In a preferred embodiment of the control system for an air conditioner under the low-humidity heating condition, the third control module sequentially increases the frequency of the compressor in stages according to a plurality of set speeds in the following manner:
the third control module enables the compressor to carry out frequency increasing according to the first frequency increasing speed;
the judging module judges whether the frequency of the compressor reaches a transition frequency;
when the frequency of the compressor reaches the transition frequency, the third control module enables the compressor to carry out frequency increasing according to a second frequency increasing speed;
wherein the transition frequency is less than the first target frequency; and/or the first up-conversion speed is greater than the second up-conversion speed.
In the preferable technical scheme of the control system of the air conditioner under the low-humidity heating working condition,
the acquisition module is also used for acquiring environmental parameters;
the judging module is also used for judging whether the environmental parameters reach target parameters;
the first control module is further used for reducing the rotating speed of the outer fan to a second target rotating speed when the environmental parameter reaches the target parameter;
the second control module is further used for reducing the opening degree of the expansion valve to a second target opening degree when the environmental parameter reaches the target parameter;
the third control module is further configured to down-convert the compressor to a second target frequency when the environmental parameter reaches the target parameter;
the environment parameter is an environment temperature or the environment humidity, and the target parameter is a target temperature or a target humidity correspondingly.
As can be understood by those skilled in the art, in a preferred embodiment of the present invention, the method for controlling the air conditioner under the low-humidity heating condition includes: acquiring the environmental humidity; when the environmental humidity is not greater than the set humidity, adjusting the opening degree of an expansion valve of the air conditioner to a first target opening degree; in the process of adjusting the opening degree of the expansion valve to a first target opening degree, starting an external fan of the air conditioner, and accelerating to a first target rotating speed according to a set acceleration; starting a compressor of the air conditioner at the same time, before or after the outer fan starts to increase the speed; continuously increasing the frequency of the compressor in stages according to a plurality of frequency increasing speeds; judging whether the frequency of the compressor reaches a first target frequency or not; and stopping the frequency increasing of the compressor when the frequency of the compressor reaches the first target frequency. Preferably, the external fan and the compressor are simultaneously started when the opening degree of the expansion valve is reduced to the reference opening degree. By canceling the continuous operation stage on the oil return frequency in the frequency increasing process of the compressor and continuously increasing the frequency of the compressor in stages at different frequency increasing speeds after the compressor is started, the invention can greatly shorten the frequency increasing time of the compressor, thereby achieving the purpose of rapid heating, improving the comfort of the air conditioner and improving the user experience. The setting method comprises the steps of obtaining the environmental humidity before the compressor is started, reducing the opening of the expansion valve to the reference opening when the environmental humidity is not more than the set humidity, and starting the compressor and the external fan simultaneously when the opening of the expansion valve is reduced to the reference opening, so that the compressor can have the matched opening of the expansion valve before being started, and the condition that the matching degree of the opening of the expansion valve and the compressor is poor after the compressor is started is avoided; on the other hand, the compressor can be started as soon as possible and the frequency of the compressor is increased when the environmental humidity is not high, the step that the outer fan needs to be started for heat dissipation (so as to avoid rapid frosting) before the compressor is started is omitted, the frequency increasing time of the compressor is further shortened, and the heating effect of the compressor after the compressor is started is improved.
Specifically, when the environmental humidity is not more than the set humidity, the expansion valve is firstly reduced to a reference opening degree, the outer fan and the compressor are started simultaneously when the expansion valve reaches the reference opening degree, the outer fan keeps at the rotating speed after reaching the maximum working rotating speed, the compressor is started and then is subjected to frequency boosting according to a first frequency boosting speed, when the frequency of the compressor reaches a transition frequency, the compressor is subjected to frequency boosting according to a second frequency boosting speed, and when the frequency of the compressor reaches a first target frequency, the compressor stops frequency boosting. The transition frequency is smaller than the first target frequency, and the first frequency increasing speed is larger than the second frequency increasing speed. Preferably, the first target frequency is a maximum operating frequency of the compressor. Repeated experiments show that when the environmental humidity is not greater than the set humidity, the opening of the expansion valve is quickly reduced to the reference opening, then the outer fan and the compressor are started simultaneously when the expansion valve reaches the reference opening, the outer fan is accelerated to the maximum working speed, and the frequency of the compressor is increased in two or more stages at the frequency increasing speed of first high and second low.
Drawings
The following describes a control method and system of an air conditioner under a low humidity heating condition according to the present invention with reference to the accompanying drawings. In the drawings:
FIG. 1 is a schematic flow chart of a control method of an air conditioner under a low-humidity heating condition according to the present invention;
FIG. 2 is a schematic diagram comparing the frequency increasing process of the compressor of the control method of the air conditioner under the low humidity heating working condition of the present invention with that of the compressor of the prior art;
fig. 3 is a schematic diagram illustrating control logic of the compressor, the external fan and the expansion valve when the ambient humidity is not greater than 60% according to the control method of the air conditioner under the low-humidity heating condition.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the present invention is described in connection with an embodiment in which the compressor is provided with two frequency-increasing stages, the arrangement is not always the same, and those skilled in the art can apply the method of the present invention to other application scenarios without departing from the principle of the present invention, for example, the compressor may be provided with three or more frequency-increasing stages.
Referring to fig. 1, fig. 1 is a schematic flow chart of a control method of an air conditioner under a low-humidity heating condition according to the present invention.
As shown in fig. 1, in order to solve the problem of poor rapid heating effect caused by long frequency boosting time in the startup frequency boosting control method of the conventional air conditioner, the invention provides a control method of an air conditioner under a low humidity heating working condition, which mainly comprises the following steps:
s100, acquiring environment humidity, namely, after a user presses a starting switch of an air conditioner to start the air conditioner and selects a heating mode, acquiring the environment humidity by the air conditioner through a hygrometer or a humidity sensor and the like, wherein the environment humidity can refer to the relative humidity of an outdoor environment;
s200, when the environmental humidity is not more than the set humidity, adjusting the opening degree of an expansion valve of the air conditioner to a first target opening degree, for example, when the environmental humidity is not more than a certain relative humidity, reducing the opening degree of the expansion valve from 480 steps to a reference opening degree according to a valve closing speed, and then increasing the opening degree of the expansion valve from the reference opening degree to the first target opening degree according to a valve opening speed, preferably, the set humidity is 60%, and the expansion valve is an electronic expansion valve or other expansion valve capable of controlling the opening degree;
it should be noted that the opening adjustment of the electronic expansion valve is driven by the stepping motor, and the minimum angle range of the stepping motor is called one step, so the opening adjustment of the electronic expansion valve is generally measured by "steps". For example, the opening degree of the expansion valve is 200 steps. I.e. the stepper motor drives the expansion valve to rotate to the 200 th angular unit. In general, when the air conditioner is in the closed state, the expansion valve is in a larger opening degree to balance the system pressure, and the opening degree of the expansion valve in the closed state of the air conditioner may be 480 steps. The reference opening is the opening corresponding to the outdoor temperature and the compressor frequency according to the operation mode, and the setting of the reference opening is beneficial to the establishment of system pressure difference, so that the quick cooling and quick heating of the air conditioner are realized. The reference opening degree may be 280 steps according to the present invention. That is, while the outside fan is started, the expansion valve opening degree is first decreased from 480 steps to 280 steps at a valve closing speed of, for example, 200P/s (i.e., 200 steps/sec), and then increased from 280 steps to a first target opening degree at a valve opening speed of, for example, 40P/s (e.g., 400 steps).
S300, in the process of adjusting the opening degree of the expansion valve to a first target opening degree, starting an outer fan of the air conditioner, accelerating to a first target rotating speed according to a set acceleration, preferably, when the opening degree of the expansion valve reaches a reference opening degree, starting the outer fan according to the acceleration which is increased by 1000r/min per second, and reaching the first target rotating speed of 3000r/min in 3 seconds, preferably, the first target rotating speed is the maximum working rotating speed of the outer fan;
s400, starting a compressor of the air conditioner at the same time, before or after the outer fan starts to increase the speed, preferably, starting the compressor of the air conditioner at the same time when the outer fan starts to increase the speed;
s500, continuously increasing the frequency of the compressor in stages according to a plurality of set speeds, for example, after the compressor is started, increasing the frequency of the compressor according to a first frequency increasing speed, and immediately switching to a second frequency increasing speed to continue increasing the frequency after the compressor operates to a certain frequency or operates for a period of time;
s600, judging whether the frequency of the compressor reaches a first target frequency, acquiring the current frequency of the compressor in real time, and comparing the current frequency with the first target frequency;
s700, when the frequency of the compressor reaches the first target frequency, the compressor stops increasing the frequency, and if the current frequency reaches the first target frequency, the compressor is maintained at the first target frequency to continue working. Preferably, the first target opening degree is an expansion valve opening degree that matches a first target frequency of the compressor, that is, the expansion valve opening degree also increases from the reference opening degree to the first target opening degree just during the consecutive upshifting to the first target frequency in stages of the start-up of the compressor.
It can be seen from the above description that, in the control method of the air conditioner of the present invention, when the ambient humidity is not greater than 60%, the expansion valve is started before the compressor, and the compressor and the external fan are started simultaneously when the expansion valve reaches the reference opening, on one hand, the opening of the expansion valve can be matched with the working frequency of the compressor when the compressor is started in advance, thereby avoiding the situation that the opening of the expansion valve is not matched with the compressor when the expansion valve is started together with the compressor, on the other hand, the compressor can be started and frequency-increased as soon as possible when the ambient humidity is not high, the step of starting the external fan for heat dissipation (to avoid rapid frost formation) before the compressor is started is omitted, the frequency-increasing time of the compressor is further shortened, and the heating effect after. The control method for continuously increasing the frequency of the compressor in stages at different frequency increasing speeds after the compressor is started can further shorten the frequency increasing time of the compressor, improve the heating effect of the compressor after the compressor is started and achieve the purpose of rapid heating. In other words, the invention cancels the process of continuous operation on the oil return frequency in the frequency rising process of the compressor, and ensures the normal oil return of the compressor and can complete the quick frequency rising of the compressor at the same time by adjusting the opening degree of the expansion valve to the reference opening degree in advance, starting the outer fan and the compressor and controlling the frequency rising speed of the compressor, thereby solving the problem of poor quick heating effect caused by long frequency rising time in the existing starting frequency rising control method, improving the comfort of the air conditioner and improving the user experience.
Of course, the first target rotation speed is not limited to one form of the maximum working rotation speed, and in the case that the heat dissipation condition of the compressor can be improved, a person skilled in the art can set the first target rotation speed to any reasonable value, so that it meets more specific application scenarios, for example, the first target rotation speed may also be a certain rotation speed value close to the maximum working rotation speed of the external fan or a maximum rotation speed value that the external fan can reach at the external environment temperature. Similarly, the setting of the ambient humidity is not limited to 60%, and those skilled in the art can adjust the setting based on different climatic conditions in different regions, for example, the value can be increased appropriately in dry regions, the set humidity can be set to about 65%, the value can be decreased appropriately in wet regions, the set humidity can be set to about 55%, and the like.
The principles of the present invention are further explained with reference to fig. 2. Fig. 2 is a schematic diagram comparing the frequency increasing process of the compressor of the control method of the air conditioner under the low humidity heating condition of the present invention and the compressor of the prior art. In fig. 2, a solid line represents an up-conversion process of the compressor in the control method of the present invention, and a dotted line represents an up-conversion process of the compressor in the related art.
As shown in fig. 2, in the prior art, a fixed frequency-increasing speed V (e.g. 1Hz/s) is generally adopted for frequency-increasing after the compressor is started, and a first oil-returning frequency f is set during the frequency-increasing process to ensure normal oil-returning of the compressor1And a second oil return frequency f2When the compressor is raised to the first oil return frequency f1When the frequency of the compressor is increased, the frequency of the compressor is increased at the frequency increasing speed V, and the frequency of the compressor is increased at the frequency increasing speed V. Likewise, the frequency of the compressor is increased to a second oil return frequency f2And maintaining the frequency for a period of time to ensure that the compressor continues to increase the frequency after stable oil return until the compressor reaches the maximum frequency fmaxAnd then stopping the frequency raising. As described in the background, such an up-conversion is due to the first oil return frequency f1And a second oil return frequency f2The temperature is maintained for a period of time, so the frequency rising speed of the compressor is seriously influenced, and although the stable oil return of the compressor is ensured, the requirement of rapid heating cannot be well met.
With continued reference to FIG. 2, as a preferred embodiment of the present invention, the continuous up-conversion process of the compressor may be divided into two stages, wherein the first stage compressor operates at a first up-conversion speed V1And performing frequency raising, and entering a second stage when the frequency is raised to the transition frequency. The second stage compressor at a second raising speed V2And performing frequency raising, and stopping frequency raising when the frequency is raised to the first target frequency. Preferably, the transition frequency may be set to the first oil return frequency f1. First raising frequency speed V1Greater than the second up-conversion speed V2For example, the first up-conversion rate may be set to 1.2Hz/s and the second up-conversion rate may be set to 0.5 Hz/s.
That is to say, in the control method of the present invention, S500 may further include the following steps:
s510, enabling the compressor to be at a first frequency increasing speed V1Performing frequency raising, such as raising the frequency of the compressor at a frequency raising speed of 1.2Hz/s by a control system of the air conditioner;
s520, judging whether the frequency of the compressor reaches the transition frequency, if so, setting the transition frequency as a first oil return frequency f1The control system judges whether the current frequency of the compressor reaches the first oil return frequency f1；
S530, reaching the transition frequency f at the compressor frequency1While the compressor is driven at a second up-conversion speed V2Performing frequency raising, e.g. at the control system determining that the current frequency of the compressor reaches f1And continuously increasing the frequency of the compressor according to the frequency increasing speed of 0.5Hz/s so as to continuously increase the frequency on the premise of ensuring the stable oil return of the compressor and finish the rapid heating of the air conditioner.
Preferably, the transition frequency f1Less than a first target frequency set to the maximum operating frequency f of the compressormax。
The control method has the advantages that: by controlling the frequency-raising speed of the compressor in the frequency-raising process, the speed/speed of the lubricating oil discharged from the compressor is correspondingly changed in the frequency-raising process of the compressor at different frequency-raising speeds, so that the oil return speed/speed of the oil return capillary tube is adapted, and the oil return stability of the compressor is ensured. Specifically, by making the compressor at the transition frequency f1The control method for changing the raising frequency speed, i.e. raising frequency in two stages with the raising frequency speed being fast first and slow second, makes the compressor at the first raising frequency speed V1At the time of frequency increase, the speed/rate of the lubricant oil discharged from the compressor reaches or exceeds the oil return speed/rate of the oil return capillary tube, and the lubricant oil in the compressor is gradually reduced. When the transition frequency f is reached1While the compressor is switched to follow the second raising speed V2Increasing the frequency, wherein the lubricant flowing out of the compressor is greatly reduced, the speed/velocity of the lubricant discharged from the compressor is less than the oil return speed/velocity of the oil return capillary tube, and the lubrication in the compressorThe amount of oil is secured. That is, the invention can ensure the normal oil return of the compressor through the change of the frequency raising speed, and simultaneously correspondingly accelerate the frequency raising speed of the compressor by canceling the control mode of the continuous operation stage on the oil return frequency, so that the compressor can be raised to the maximum working frequency more quickly, and then the compressor can be operated at the maximum working frequency, thereby meeting the requirement of the user on quick heating. As is apparent from fig. 2, through repeated experiments by the inventor, the time for the compressor of the present invention to reach the maximum operating frequency is significantly less than the time for the compressor of the prior art to reach the maximum operating frequency.
It should be noted that the above preferred control method and specific values are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can make any type of adjustment on the above parameters without departing from the principle of the present invention, as long as the adjusted technical scheme can improve the condition of raising the frequency raising speed on the premise of ensuring the normal oil return of the compressor. If the frequency raising stage can be further divided into three stages, each stage raises the frequency at different frequency raising speeds (such as fast and slow modes); the transition frequency can also float up and down according to the first oil return frequency; the first target frequency is not the maximum operating frequency of the compressor but a value close to the maximum operating frequency, etc.
In addition, in order to better improve the experience of the user using the air conditioner, when the compressor operates at the maximum operating frequency, the control method of the air conditioner of the present invention may further include the steps of:
s800, acquiring environmental parameters, such as current environmental temperature (such as indoor/outdoor temperature);
s900, when the environmental parameter reaches/approaches the target parameter, the compressor is reduced to a second target frequency, meanwhile, the rotating speed of the outer fan is reduced to the second target rotating speed, and the opening degree of the expansion valve is reduced to the second target opening degree.
The advantages of this arrangement are: after the air conditioner heats rapidly for a period of time, the indoor temperature rises correspondingly, when the indoor temperature of the ring reaches/approaches the temperature set by a user, the compressor does not need to work continuously at the maximum working frequency, the external fan does not need to work at the maximum rotating speed for heat dissipation naturally, and the expansion valve does not need to work at the first target opening matched with the compressor. At this time, the compressor is reduced to the rated working frequency or the working frequency more matched with the current outdoor environment (such as outdoor temperature), the rotating speed of the outer fan is reduced to the rated working rotating speed or the rotating speed matched with the compressor, and the opening degree of the expansion valve is reduced to the opening degree matched with the compressor, so that the normal work of the air conditioner can be ensured, and the working life of the compressor, the outer fan and the expansion valve can be effectively prolonged.
Of course, the environmental parameter and the corresponding target parameter are not all the same, but may be an environmental humidity (such as an outdoor humidity), a target humidity set by a user, and the like.
The invention also provides a control system of the air conditioner under the low-humidity heating working condition, which mainly comprises:
the acquisition module is used for acquiring the environment humidity, and acquiring the relative humidity of the outdoor environment if the air conditioner is started to select a heating mode;
the first control module is used for reducing the opening degree of an expansion valve of the air conditioner to a reference opening degree according to a set valve closing speed when the ambient humidity is not more than the set humidity, and increasing the opening degree of the expansion valve to a first target opening degree according to a set valve opening speed when the opening degree of the expansion valve reaches the reference opening degree;
the second control module is used for starting the external fan when the opening degree of the expansion valve reaches the reference opening degree and accelerating the speed to a first target rotating speed according to the set acceleration;
the third control module is used for starting the compressor while the external fan starts to increase the speed, continuously increasing the frequency of the compressor in stages according to a plurality of set speeds, and stopping increasing the frequency of the compressor when the frequency of the compressor reaches the first target frequency;
and the judging module is used for judging whether the environmental humidity is not more than the set humidity, whether the expansion valve reaches the reference opening degree, whether the outer fan starts to increase the speed and whether the compressor reaches the first target frequency.
The third control module enables the compressor to continuously increase the frequency in stages according to a plurality of set speeds in the following mode:
the third control module makes the compressor at the first frequency raising speed V1Performing frequency boosting;
the judging module judges whether the frequency of the compressor reaches the transition frequency f1；
Reaching a transition frequency f at the compressor frequency1While the third control module makes the compressor at the second frequency-raising speed V2Performing frequency boosting;
preferably, the first up-conversion speed V1Greater than the second up-conversion speed V2Transition frequency f1Less than a first target frequency, and the first target frequency is the maximum operating frequency f of the compressormaxThe first target opening degree is equal to the maximum working frequency fmaxMatched opening degree of the expansion valve.
In addition, the acquisition module is also used for acquiring environmental parameters, such as outdoor/indoor temperature and outdoor/indoor humidity and the like, by adopting a temperature/humidity sensor in real time;
after the acquisition module acquires the environmental parameters, the judgment module is further used for judging whether the environmental parameters reach target parameters, such as target temperature of heating set by a user and the like;
the first control module is also used for reducing the opening of the expansion valve to a second target opening when the environmental parameter reaches the target parameter; the second control module is also used for reducing the rotating speed of the outer fan to a second target rotating speed when the environmental parameter reaches the target parameter; the third control module is also used for reducing the frequency of the compressor to a second target frequency when the environmental parameter reaches the target parameter; if the indoor temperature reaches the target temperature set by the user, the third control module firstly reduces the frequency of the compressor to the rated working frequency, then the second control module reduces the rotating speed of the outer fan to the rated working rotating speed, and the first control module reduces the opening of the expansion valve to the opening matched with the rated working frequency of the compressor.
Those skilled in the art can understand that the physical forms of the first control module, the second control module, the third control module and the judgment module can be independent from each other, and certainly can be functional units integrated on one physical module. The control system of the air conditioner comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the computer program can complete the functions of the first control module, the second control module, the third control module and the judgment module.
The working principle of the air conditioner control method and system under low humidity heating condition of the present invention will be briefly described with reference to fig. 3. Fig. 3 is a schematic diagram illustrating control logic of the compressor, the external fan and the expansion valve when the ambient humidity is not greater than 60% according to the control method of the air conditioner under the low-humidity heating condition.
As shown in fig. 3, when the air conditioner is in the heating mode, the working processes of the external fan, the expansion valve and the compressor may be:
air conditioner start heating → obtaining outdoor relative humidity → when the outdoor relative humidity is not more than 60%, the expansion valve closes at the valve closing speed V21' Slave opening degree B1' Start decrease opening → Via T1After the time interval, the opening degree of the expansion valve reaches a reference opening degree B'2The compressor and the external fan are started simultaneously, and the expansion valve is opened at a valve speed V22' increase opening degree, wherein the compressor is at an increasing speed V11' Up-frequency, external fan according to acceleration a1Increasing the speed and reaching the maximum operating speed n1Operation at maximum operating speed → warp T2The compressor frequency reaches the transition frequency f after a time interval1At an up-conversion speed V12' continuously increasing frequency, the expansion valve continuously according to the valve opening speed V22' increasing opening → meridian T3The compressor frequency reaches the maximum operating frequency f after a time interval2' and stop raising the frequency, the opening degree of the expansion valve reaches and f2' matched B3' and is stabilized at this opening → Trans T4After a time interval, the indoor temperature reaches the set temperature of the user, and the compressor reduces the frequency at a speed V13' Down-conversion while the outer fan is accelerated by an acceleration a2' carry out a reduction of the rotation speed, the expansion valve is closed at a valve closing speed V23' reduced opening → warp T5After a time interval the compressor frequency is reduced to the nominal operating frequency f3' and maintained at this frequency while the outer fan speed is reduced to the rated operating speed n1' and maintained at this frequency, the expansion valve opening is reduced to3'matched B'4And maintained at this frequency.
In the above preferred embodiment, the air conditioner control method mainly includes: acquiring outdoor relative humidity; when the relative humidity is not more than 60%, reducing the opening of the expansion valve to a reference opening according to a set valve closing speed; when the opening degree of the expansion valve reaches a reference opening degree, the compressor and the outer fan are started simultaneously, the outer fan is accelerated to the maximum working rotation speed according to set acceleration, the compressor is continuously accelerated according to a first frequency acceleration speed and a second frequency acceleration speed, and the expansion valve is increased to the opening degree matched with the frequency of the compressor according to a valve opening speed; judging whether the frequency of the compressor reaches the maximum working frequency or not; and stopping raising the frequency when the frequency of the compressor reaches the maximum working frequency, and simultaneously enabling the expansion valve to reach the opening degree matched with the maximum working frequency. Wherein the first frequency increasing speed is larger than the second frequency increasing speed. The control system of the air conditioner comprises a first control module, a second control module, a third control module, a judgment module and a collection module. The expansion valve is adjusted firstly when the relative humidity is not more than 60%, when the opening of the expansion valve is reduced to the reference opening, the compressor and the outer fan are started simultaneously, the opening of the expansion valve is increased to the opening matched with the compressor, and the compressor is subjected to frequency raising in two stages of raising the frequency speed first and then slowly, so that the expansion valve can be matched with the frequency during the starting of the compressor in advance, the compressor is started quickly, normal oil return of the compressor is guaranteed through the change of the raising frequency speed of the compressor, the compressor can be raised to the maximum working frequency quickly, the compressor can operate at the maximum working frequency, the requirement of a user for quick heating is met, and the user experience is improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of an air conditioner under a low-humidity heating working condition is characterized by comprising the following steps:
acquiring the environmental humidity;
when the environmental humidity is not greater than the set humidity, adjusting the opening degree of an expansion valve of the air conditioner to a first target opening degree;
in the process of adjusting the opening degree of the expansion valve to the first target opening degree, starting an external fan of the air conditioner, and accelerating to a first target rotating speed according to a set acceleration;
starting a compressor of the air conditioner at the same time, before or after the outer fan starts to increase the speed;
and continuously increasing the frequency of the compressor in stages according to a plurality of increasing frequency speeds.
2. The control method of the air conditioner under the low-humidity heating working condition according to claim 1, further comprising:
after the frequency is continuously increased in stages, judging whether the frequency of the compressor reaches a first target frequency;
stopping the compressor from increasing frequency when the compressor frequency reaches the first target frequency.
3. The method as claimed in claim 2, wherein the step of adjusting the opening degree of the expansion valve of the air conditioner to a first target opening degree further comprises:
reducing the opening degree of the expansion valve to a reference opening degree according to a set valve closing speed;
when the expansion valve opening degree reaches the reference opening degree, the expansion valve opening degree is increased to the first target opening degree at a set valve opening speed.
4. The method as claimed in claim 3, wherein the step of starting an external fan of the air conditioner in the process of adjusting the opening degree of the expansion valve to the first target opening degree further comprises:
and when the opening degree of the expansion valve reaches the reference opening degree, starting the outer fan.
5. The method for controlling the air conditioner under the low-humidity heating condition according to claim 4, wherein the step of starting the compressor of the air conditioner at the same time, before or after the speed of the external air blower is increased further comprises:
and starting a compressor of the air conditioner while the outer fan starts to increase the speed.
6. The method as claimed in claim 2, wherein the step of "enabling the compressor to continuously increase the frequency in stages at a plurality of set speeds" further comprises:
enabling the compressor to perform frequency boosting according to a first frequency boosting speed;
judging whether the frequency of the compressor reaches a transition frequency;
when the frequency of the compressor reaches the transition frequency, the compressor is enabled to carry out frequency raising according to a second frequency raising speed;
wherein the transition frequency is less than the first target frequency.
7. The control method of the air conditioner under the low humidity heating condition as claimed in claim 6,
the first frequency increasing speed is greater than the second frequency increasing speed; and/or
The first target frequency is a maximum operating frequency of the compressor; and/or
The first target rotating speed is the maximum working rotating speed of the outer fan; and/or
The first target opening degree is an expansion valve opening degree matched with the first target frequency, and/or
The set humidity was 60%.
8. The control method of the air conditioner under the low-humidity heating condition according to any one of claims 1 to 7, further comprising:
acquiring an environmental parameter;
when the environmental parameter reaches a target parameter, the compressor is subjected to frequency reduction to a second target frequency; and is
Reducing the rotating speed of the outer fan to a second target rotating speed; and is
Decreasing the expansion valve opening to a second target opening;
the environment parameter is an environment temperature or the environment humidity, and the target parameter is a target temperature or a target humidity correspondingly.
9. A control system of an air conditioner under a low humidity heating working condition is characterized by comprising:
the acquisition module is used for acquiring the environmental humidity;
a first control module, configured to reduce an opening degree of an expansion valve of the air conditioner to a reference opening degree at a set valve closing speed when the ambient humidity is not greater than a set humidity, and increase the opening degree of the expansion valve to a first target opening degree at a set valve opening speed when the opening degree of the expansion valve reaches the reference opening degree;
the second control module is used for starting an external fan of the air conditioner and accelerating the external fan to a first target rotating speed according to a set acceleration when the opening degree of the expansion valve reaches the reference opening degree;
the third control module is used for starting a compressor of the air conditioner while the external fan starts to increase the speed, continuously increasing the frequency of the compressor in stages according to a plurality of set speeds, and stopping increasing the frequency of the compressor when the frequency of the compressor reaches a first target frequency;
and the judging module is used for judging whether the environment humidity is not greater than the set humidity, whether the opening of the expansion valve reaches the reference opening, whether the outer fan starts to increase the speed and whether the frequency of the compressor reaches the first target frequency.
10. The control system of an air conditioner under low humidity heating condition as claimed in claim 9, wherein the third control module makes the compressor frequency up-converted in stages and continuously according to a plurality of set speeds according to the following manner:
the third control module enables the compressor to carry out frequency increasing according to the first frequency increasing speed;
the judging module judges whether the frequency of the compressor reaches a transition frequency;
when the frequency of the compressor reaches the transition frequency, the third control module enables the compressor to carry out frequency increasing according to a second frequency increasing speed;
wherein the transition frequency is less than the first target frequency; and/or
The first frequency-increasing speed is greater than the second frequency-increasing speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710866972.2A CN107677006B (en) | 2017-09-22 | 2017-09-22 | Control method and system of air conditioner under low-humidity heating working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710866972.2A CN107677006B (en) | 2017-09-22 | 2017-09-22 | Control method and system of air conditioner under low-humidity heating working condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107677006A CN107677006A (en) | 2018-02-09 |
| CN107677006B true CN107677006B (en) | 2020-08-04 |
Family
ID=61137662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710866972.2A Active CN107677006B (en) | 2017-09-22 | 2017-09-22 | Control method and system of air conditioner under low-humidity heating working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107677006B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548292A (en) * | 2018-03-31 | 2018-09-18 | 青岛海尔空调器有限总公司 | The control method of air-conditioning under refrigeration mode |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008057079A1 (en) * | 2006-11-07 | 2008-05-15 | Carrier Corporation | Refrigerant system with pulse width modulation control in combination with expansion device control |
| CN101813343A (en) * | 2010-04-19 | 2010-08-25 | 广东吉荣空调有限公司 | High-precision constant-temperature and humidity air conditioner operated in wide temperature range |
| CN102419041A (en) * | 2011-12-13 | 2012-04-18 | Tcl空调器(中山)有限公司 | Throttle opening degree control method for varied-frequency air-conditioner |
| CN103968497A (en) * | 2013-01-30 | 2014-08-06 | 珠海格力电器股份有限公司 | Method and device for adjusting running frequency of air conditioner compressor and air conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100204838A1 (en) * | 2009-02-12 | 2010-08-12 | Liebert Corporation | Energy efficient air conditioning system and method utilizing variable capacity compressor and sensible heat ratio load matching |
-
2017
- 2017-09-22 CN CN201710866972.2A patent/CN107677006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008057079A1 (en) * | 2006-11-07 | 2008-05-15 | Carrier Corporation | Refrigerant system with pulse width modulation control in combination with expansion device control |
| CN101813343A (en) * | 2010-04-19 | 2010-08-25 | 广东吉荣空调有限公司 | High-precision constant-temperature and humidity air conditioner operated in wide temperature range |
| CN102419041A (en) * | 2011-12-13 | 2012-04-18 | Tcl空调器(中山)有限公司 | Throttle opening degree control method for varied-frequency air-conditioner |
| CN103968497A (en) * | 2013-01-30 | 2014-08-06 | 珠海格力电器股份有限公司 | Method and device for adjusting running frequency of air conditioner compressor and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107677006A (en) | 2018-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107631443B (en) | Control method and system of air conditioner under low-humidity heating working condition | |
| CN107702280B (en) | Control method and system of air conditioner in refrigeration mode | |
| CN107576031B (en) | Control method and system of air conditioner under low-temperature high-humidity heating working condition | |
| CN107631430B (en) | Control method and system of air conditioner under low-temperature heating working condition | |
| CN107702281B (en) | Control method and system of air conditioner under low-temperature low-humidity heating working condition | |
| CN107677005B (en) | Control method and system of air conditioner under low-temperature heating working condition | |
| CN107576016B (en) | Control method and system of air conditioner | |
| CN107726558B (en) | Control method and system of air conditioner under high-humidity heating working condition | |
| CN107576029B (en) | Control method and system of air conditioner under low-temperature low-humidity heating working condition | |
| CN107606835B (en) | Control method and system of air conditioner in refrigeration mode | |
| CN105972772B (en) | The defrosting control method and device of air conditioner | |
| CN107726556B (en) | Control method and system of air conditioner under low-temperature high-humidity heating working condition | |
| CN110030695B (en) | Control method of air conditioner under high-humidity heating working condition | |
| CN108548269B (en) | Control method of air conditioner | |
| CN110057050B (en) | Control method of air conditioner in refrigeration mode | |
| CN107631438B (en) | Control method and system of air conditioner under high-humidity heating working condition | |
| CN107655247B (en) | Control method and system of air conditioner in refrigeration mode | |
| CN108534322B (en) | Starting control method of air conditioner | |
| CN108758998B (en) | Control method of air conditioner | |
| CN110822617A (en) | Control method for air conditioner and air conditioner | |
| CN110500747B (en) | Control method of air conditioner | |
| CN107726557B (en) | Control method and system of air conditioner under low-temperature high-humidity heating working condition | |
| CN110030694B (en) | Control method of air conditioner under low-temperature heating working condition | |
| CN107576113B (en) | Control method and system of air conditioner under high-humidity heating working condition | |
| CN108548304B (en) | Control method of air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200915 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Co-patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201104 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee before: QINGDAO HAIER (JIAOZHOU) AIR CONDITIONER Co.,Ltd. |