CN115717787A - Air conditioner control method and device and air conditioner - Google Patents
Air conditioner control method and device and air conditioner Download PDFInfo
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- CN115717787A CN115717787A CN202211399369.5A CN202211399369A CN115717787A CN 115717787 A CN115717787 A CN 115717787A CN 202211399369 A CN202211399369 A CN 202211399369A CN 115717787 A CN115717787 A CN 115717787A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000004378 air conditioning Methods 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010257 thawing Methods 0.000 abstract description 31
- 239000007788 liquid Substances 0.000 abstract description 14
- 239000003507 refrigerant Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010977 unit operation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The invention discloses an air conditioner control method, an air conditioner control device and an air conditioner, wherein the air conditioner comprises the following components: compressor, cross valve, outdoor heat exchanger, indoor heat exchanger still include: one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor; the method comprises the following steps: after defrosting of the air conditioner is finished, controlling the compressor to start; detecting parameters of suction pressure and outdoor environment temperature of the compressor; and controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the outdoor environment temperature parameters. The invention solves the problems of heat exchanger frosting and compressor liquid impact caused by too fast low pressure drop of the compressor after air conditioner defrosting in the prior art, and ensures the running reliability of the unit and the indoor comfort after defrosting.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device and an air conditioner.
Background
In the process of heating operation of a heat pump air conditioner, an outdoor heat exchanger frosts, and in the prior art, the defrosting is mostly carried out in a four-way valve reversing mode, namely, the operation mode is switched from heating to refrigerating. Although the defrosting mode is high in efficiency, some technical problems still exist in the defrosting process and are not solved, for example, because the four-way valve is a pilot valve body, when the defrosting switches the operation mode, the compressor needs to be subjected to frequency reduction firstly, and the frequency is increased again after the four-way valve is reversed. The low pressure drops too fast in the frequency increasing process, so that the heat exchanger frosts again, the reliability of the unit is affected along with liquid impact of the compressor, and the lower the outdoor environment temperature parameter is, the more obvious the situation is. Furthermore, if the frequency increase is too slow, the heat load in the room is not supplemented for a long time, and the indoor comfort experience is very poor.
Aiming at the problems of heat exchanger frosting and compressor liquid impact caused by quick low pressure drop of a compressor after air conditioner defrosting in the related art, no effective solution is provided at present.
Disclosure of Invention
The invention provides an air conditioner control method and device and an air conditioner, and at least solves the problems that a heat exchanger frosts and a compressor liquid impact is caused by the fact that a compressor is too fast in low pressure drop after the air conditioner is defrosted in the prior art.
In order to solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioner control method, the air conditioner including: compressor, cross valve, outdoor heat exchanger, indoor heat exchanger still include: one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor; the air conditioner control method comprises the following steps:
after defrosting of the air conditioner is finished, controlling the compressor to start;
detecting parameters of suction pressure and outdoor environment temperature of the compressor;
and controlling the on-off of the bypass branch and the operation of the compressor according to the parameters of the suction pressure and the outdoor environment temperature.
Further, the bypass branch comprises: one end of the exhaust bypass branch is connected with a first connecting point, the other end of the exhaust bypass branch is connected with an exhaust port of the compressor, one end of the suction bypass branch is connected with a second connecting point on the exhaust bypass branch, and the other end of the suction bypass branch is connected with a suction port of the compressor; the air conditioner further includes: the first control valve is positioned between the second connecting point and the air suction port; a second control valve located between the first connection point and the second connection point.
Further, the on-off of the bypass branch and the operation of the compressor are controlled according to the parameters of the suction pressure and the outdoor environment temperature, and the method comprises the following steps:
determining a target pressure value according to the outdoor environment temperature parameter;
and controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the target pressure value.
Further, determining a target pressure value according to the outdoor environment temperature parameter includes:
calculating the dew point temperature of the outdoor environment according to the outdoor environment temperature parameter;
determining a pressure correction value according to the dew point temperature of the outdoor environment;
and calculating a target pressure value according to the outdoor environment dew point temperature and the pressure correction value.
Further, the on-off of the bypass branch and the operation of the compressor are controlled according to the suction pressure and the target pressure value, and the method comprises the following steps:
judging whether the suction pressure is less than or equal to a target pressure value;
if yes, controlling the compressor to stop starting, and controlling the second control valve to open;
otherwise, controlling the compressor to continue to start.
Further, after controlling the second control valve to open, the method further comprises:
judging whether the suction pressure reaches a preset condition or not;
if yes, controlling the first control valve to open;
otherwise, controlling the second control valve to close and controlling the compressor to continue to start.
Further, after controlling the first control valve to open, the method further comprises:
determining whether an operating frequency of the compressor reaches a target operating frequency;
if yes, controlling the first electromagnetic valve and the second control valve to be closed, and controlling the compressor to continue to start;
otherwise, controlling the compressor to continue to start.
Further, the preset condition includes at least one of: the suction pressure keeps descending trend, and the suction pressure is less than or equal to the target pressure value.
According to another aspect of the embodiments of the present invention, there is provided an air conditioner control device, the air conditioner including: compressor, cross valve, outdoor heat exchanger, indoor heat exchanger still include: one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor; the air conditioning control device includes:
the starting module is used for controlling the starting of the compressor after the defrosting of the air conditioner is finished;
the detection module is used for detecting the suction pressure of the compressor and the outdoor environment temperature parameter;
and the control module is used for controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the outdoor environment temperature parameters.
According to still another aspect of the embodiments of the present invention, there is provided an air conditioner including a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, and further including: one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor; the air conditioner control device described above.
According to still another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning control method as described above when executed by a computer processor.
The invention provides a control scheme for restarting an air conditioning unit after defrosting, which is characterized in that the loading of a compressor and the flow direction of a refrigerant are adjusted by detecting the outdoor temperature and the suction pressure of the compressor, so that the low pressure in the starting process of the compressor is stably controlled, the frosting phenomenon and liquid impact damage to the compressor in the starting process are avoided, the reliable operation of the unit after defrosting and the maximum output of the heat load can be ensured, the control is more reasonable and intelligent, the indoor comfort level is higher, and the problems of frosting of a heat exchanger and liquid impact of the compressor caused by the rapid reduction of the low pressure of the compressor after defrosting of the air conditioner in the prior art are effectively solved.
Drawings
Fig. 1 is an alternative configuration diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is an alternative flowchart of an air conditioner control method according to an embodiment of the present invention;
fig. 3 is another alternative flowchart of an air conditioner control method according to an embodiment of the present invention;
fig. 4 is a block diagram of an alternative configuration of an air conditioning control apparatus according to an embodiment of the present invention.
Description of the reference numerals:
1. a compressor; 2. a four-way valve; 3. an outdoor heat exchanger; 4. an indoor heat exchanger; 5. a first control valve; 6. a second control valve; 7. a throttling device; 8. gas separation; 9. an ambient temperature and humidity sensor; 10. a heating electronic expansion valve; 11. an electronic expansion valve of the indoor unit; 12. an electromagnetic valve 1; 13. a solenoid valve 2.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In preferred embodiment 1 of the present invention, there is provided an air conditioner, as shown in fig. 1, comprising: the system comprises a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 4 and a bypass branch; one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor.
Specifically, the bypass branch comprises an exhaust bypass branch and an air suction bypass branch, one end of the exhaust bypass branch is connected with the first connecting point, the other end of the exhaust bypass branch is connected with an exhaust port of the compressor, one end of the air suction bypass branch is connected with the second connecting point on the exhaust bypass branch, and the other end of the air suction bypass branch is connected with an air suction port of the compressor; the air conditioner further includes: a first control valve 5 located between the second connection point and the suction port; and a second control valve 6 between the first connection point and the second connection point. The control valve can be an electromagnetic valve and can also be replaced by an expansion valve, so that the bypass flow can be more accurately adjusted, and the effect of controlling the size of low pressure is realized. Furthermore, a throttle device 7, for example a capillary tube, is arranged between the discharge of the compressor and the second connection point.
The air conditioner is additionally provided with a bypass branch on the basis of a conventional multi-split system, and the bypass branch is connected with an outdoor heat exchanger and the exhaust side and/or the suction side of a compressor. When heating is needed, high-temperature and high-pressure gas can be bypassed to the outdoor for ventilation, and the high-temperature and high-pressure gas is used for defrosting of an outdoor heat exchanger and improving low pressure.
There is also provided in preferred embodiment 1 of the present invention an air conditioner control method which can be directly applied to an air conditioner as shown in fig. 1. Specifically, fig. 2 shows an alternative flow chart of the method, and as shown in fig. 2, the method includes the following steps S202-S206:
s202: after defrosting of the air conditioner is finished, controlling the compressor to start;
s204: detecting parameters of suction pressure and outdoor environment temperature of the compressor;
s206: and controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the outdoor environment temperature parameters.
In the above embodiment, a control scheme that air conditioning unit restarts after defrosting is provided, through detecting outdoor temperature, compressor suction pressure adjusts compressor loading and refrigerant flow direction, low pressure in the stable control compressor start-up process, avoid appearing frosting phenomenon again and liquid attack damage compressor in the start-up process, can ensure that the reliability operation and the heat load of unit operation carry out the maximum output after the defrosting, control is more reasonable, intelligence, indoor comfort level is higher, the problem that compressor low pressure drops too fast and leads to heat exchanger frosting and compressor liquid attack among the prior art after the air conditioning defrosting effectively has been solved.
As an alternative embodiment of the present invention, the controlling of the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the outdoor environment temperature parameters comprises: determining a target pressure value according to the outdoor environment temperature parameter; and controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the target pressure value. Specifically, determining the target pressure value according to the outdoor environment temperature parameter includes: calculating the dew point temperature of the outdoor environment according to the outdoor environment temperature parameter; determining a pressure correction value according to the dew point temperature of the outdoor environment; and calculating a target pressure value according to the outdoor environment dew point temperature and the pressure correction value.
In the above embodiment, the outdoor environment temperature parameter may include an outdoor environment temperature and an outdoor environment humidity, and the outdoor environment dew-point temperature is calculated from the outdoor environment temperature and the outdoor environment humidity. Considering that most air conditioners do not have the capability of detecting the humidity of the outdoor environment, the humidity can be preset according to the use place and the ambient temperature. The humidity values can be set as follows.
TABLE 1 humidity value-taking table
| Outdoor ambient temperature/. Degree.C | -30～-8 | -7～7 | 8～18 | 18～27 | 27～35 | 35～55 |
| Value of humidity | 75％ | 87％ | 85％ | 80％ | 41％ | 23％ |
After the outdoor environment dew point temperature is determined, the corresponding pressure correction value K may be determined according to a preset correspondence table of the outdoor environment dew point temperature and the pressure correction value. Table 2 below is a table of alternative outdoor ambient dew point temperature versus pressure correction values.
TABLE 2 correction value taking table
| Dew point temperature/deg.C of outdoor environment | -30～-15 | -14～-5 | -5～5 | 5～15 |
| K | K1 | K2 | K3 | K4 |
The K value can be set according to the unit design and the use environment. Under the normal condition, in an ultralow temperature environment, such as below 15 ℃ below zero and below 40% of humidity, the heat exchange capacity of the unit is poor, but frost is not easy to form, and the K value can be set to be larger. In a low-temperature and high-humidity environment, such as about 0 ℃, the humidity is more than 80%, the unit is easy to frost, and the K value can be set to be small.
In an alternative embodiment of the invention, the target pressure value = outdoor ambient dew point temperature — pressure correction value; wherein, the target pressure value is expressed by corresponding saturation temperature, and the unit of K value is also temperature unit.
The method for controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the target pressure value comprises the following steps: judging whether the suction pressure is less than or equal to a target pressure value; if yes, controlling the compressor to stop starting, and controlling the second control valve to open; otherwise, controlling the compressor to continue to start. And the second control valve is opened, and high-temperature and high-pressure gas is bypassed to the outdoor heat exchanger to be used for defrosting and raising the low pressure of the system.
After controlling the second control valve to be opened, judging whether the suction pressure reaches a preset condition; if yes, controlling the first control valve to open; otherwise, controlling the second control valve to close and controlling the compressor to continue to start. The preset condition includes at least one of the following: the suction pressure keeps descending trend, and the suction pressure is less than or equal to the target pressure value. After controlling the first control valve to open, the method further comprises the following steps: determining whether an operating frequency of the compressor reaches a target operating frequency; if yes, controlling the first electromagnetic valve and the second control valve to be closed, and controlling the compressor to be started continuously; otherwise, controlling the compressor to continue to start. And if the low pressure is still continuously reduced after the second control valve is opened or the low pressure does not rise to the target value, the first control valve is opened, the bypass amount of the suction side is increased, the rising of the low pressure is accelerated, the opening state of the control valve is kept after the low pressure continues to rise for a period of time, and the compressor is restored to be loaded.
Another air conditioner control method is further provided in preferred embodiment 1 of the present invention, and specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S301 to S313:
s301, restarting after defrosting;
s302, loading an anti-frosting program;
s303, detecting the low pressure PL of the system; system low pressure PL, i.e. compressor suction pressure;
s304, detecting the environmental temperature and humidity and calculating the dew point temperature T DP (ii) a And calculating the dew-point temperature of the outdoor environment according to the outdoor environment temperature and the outdoor environment humidity. Considering that most air conditioners do not have the capacity of detecting the outdoor environment humidity, the humidity can be preset according to the use place and the environment temperature;
s305, determining a low-voltage correction value K; the K value can be set according to the unit design and the use environment. Under the normal condition, in an ultralow temperature environment, such as below 15 ℃ below zero and below 40% of humidity, the heat exchange capacity of the unit is poor, but frost is not easy to form, and the K value can be set to be larger. In a low-temperature and high-humidity environment, such as about 0 ℃, the humidity is more than 80%, the unit is easy to frost, and the K value can be set to be small;
s306, target low pressure PL' = TDP-K; target low pressure PL', i.e. target pressure value;
s307, judging whether PL is less than or equal to PL' or not; if yes, go to step S308, otherwise go to step S309;
s308, stopping loading the compressor and starting a second control valve; the second control valve is opened, and high-temperature and high-pressure gas is bypassed to the outdoor heat exchanger to be used for defrosting and raising the low pressure of the system;
s309, closing the first control valve and the second control valve, and loading the compressor for 5S according to the conventional logic;
(S310) PL is less than or equal to PL' after the low pressure is continuously reduced for 5S or 10S; judging whether the suction pressure reaches a preset condition, if so, entering step S311, otherwise, entering step S309;
s311, stopping loading the compressor, starting the first control valve, and continuing for 5S; if the low pressure is still continuously reduced after the second control valve is opened or the low pressure does not rise to the target value, the first control valve is opened, the bypass quantity of the suction side is increased, and the low pressure rising is accelerated;
s312, the compressor reaches the target frequency; if yes, go to step S309, otherwise go to step S313; after the first control valve is opened for a period of time, the opening state of the control valve is kept, and the compressor resumes loading;
and S313, opening the first control valve and the second control valve, and loading the compressor for 5S according to the conventional logic.
According to the control scheme, the air conditioning unit is controlled by calculating the environmental dew point temperature through the environmental temperature and humidity, and the unit control and the operation environment are combined, so that the control is more reasonable and intelligent. Meanwhile, the high-temperature and high-pressure gas is bypassed to the front of the heat exchanger and the air suction pipe, the loading rate of the compressor is controlled, and the conditions that the low pressure is reduced too fast, the heat exchanger is frosted and the compressor is damaged due to the fact that the compressor is loaded too fast are avoided.
Example 2
Based on the air conditioner control method provided in the foregoing embodiment 1, in a preferred embodiment 2 of the present invention, an air conditioner control device is further provided, and specifically, fig. 4 shows an alternative structural block diagram of the device, and as shown in fig. 4, the device includes:
a starting module 402, configured to control starting of the compressor after defrosting of the air conditioner is completed;
a detection module 404 connected to the starting module 402 for detecting the suction pressure of the compressor and the outdoor environment temperature parameter;
and the control module 406 is connected with the detection module 404 and is used for controlling the on-off of the bypass branch and the operation of the compressor according to the parameters of the suction pressure and the outdoor environment temperature.
In the above embodiment, a control scheme that air conditioning unit restarts after defrosting is provided, through detecting outdoor temperature, compressor suction pressure adjusts compressor loading and refrigerant flow direction, low pressure in the stable control compressor start-up process, avoid appearing frosting phenomenon again and liquid attack damage compressor in the start-up process, can ensure that the reliability operation and the heat load of unit operation carry out the maximum output after the defrosting, control is more reasonable, intelligence, indoor comfort level is higher, the problem that compressor low pressure drops too fast and leads to heat exchanger frosting and compressor liquid attack among the prior art after the air conditioning defrosting effectively has been solved.
The control module 406 includes: the determining submodule is used for determining a target pressure value according to the outdoor environment temperature parameter; and the control submodule is used for controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the target pressure value.
The determination submodule includes: calculating the dew point temperature of the outdoor environment according to the outdoor environment temperature parameter; determining a pressure correction value according to the dew point temperature of the outdoor environment; and calculating a target pressure value according to the outdoor environment dew point temperature and the pressure correction value.
The bypass branch includes: one end of the exhaust bypass branch is connected with a first connecting point, the other end of the exhaust bypass branch is connected with an exhaust port of the compressor, one end of the suction bypass branch is connected with a second connecting point on the exhaust bypass branch, and the other end of the suction bypass branch is connected with a suction port of the compressor; the air conditioner further includes: a first control valve located between the second connection point and the suction port; a second control valve located between the first connection point and the second connection point.
The control sub-module includes: the first judging unit is used for judging whether the suction pressure is less than or equal to a target pressure value or not; the first control unit is used for controlling the compressor to stop starting and controlling the second control valve to open if the first control unit is used for controlling the compressor to stop starting; otherwise, controlling the compressor to continue to start.
The second judgment unit is used for judging whether the suction pressure reaches a preset condition or not after the second control valve is controlled to be opened; the first control unit is used for controlling the opening of the first control valve if the first control valve is opened; otherwise, controlling the second control valve to close and controlling the compressor to continue to start.
A third judging unit for determining whether the operating frequency of the compressor reaches the target operating frequency after controlling the first control valve to be opened; the third control unit is used for controlling the first electromagnetic valve and the second control valve to be closed and controlling the compressor to be started continuously if the first electromagnetic valve and the second control valve are closed; otherwise, controlling the compressor to continue to start.
Wherein the preset condition at least comprises one of the following conditions: the suction pressure keeps descending trend, and the suction pressure is less than or equal to the target pressure value.
With regard to the apparatus in the above embodiments, the specific manner in which each unit and each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.
Example 3
Based on the air-conditioning control device provided in the above embodiment 2, there is also provided in a preferred embodiment 3 of the present invention an air conditioner, as shown in fig. 1, including a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, a bypass branch, and the air-conditioning control device as in the above embodiment 2.
In the above embodiment, a control scheme that air conditioning unit restarts after defrosting is provided, through detecting outdoor temperature, compressor suction pressure adjusts compressor loading and refrigerant flow direction, low pressure in the stable control compressor start-up process, avoid appearing frosting phenomenon again and liquid attack damage compressor in the start-up process, can ensure that the reliability operation and the heat load of unit operation carry out the maximum output after the defrosting, control is more reasonable, intelligence, indoor comfort level is higher, the problem that compressor low pressure drops too fast and leads to heat exchanger frosting and compressor liquid attack among the prior art after the air conditioning defrosting effectively has been solved.
Example 4
Based on the air-conditioning control method provided in embodiment 1 above, there is also provided in preferred embodiment 4 of the present invention a storage medium containing computer-executable instructions for performing the air-conditioning control method as described above when executed by a computer processor.
In the above embodiment, a control scheme that air conditioning unit restarts after defrosting is provided, through detecting outdoor temperature, compressor suction pressure adjusts compressor loading and refrigerant flow direction, low pressure in the stable control compressor start-up process, avoid appearing frosting phenomenon again and liquid attack damage compressor in the start-up process, can ensure that the reliability operation and the heat load of unit operation carry out the maximum output after the defrosting, control is more reasonable, intelligence, indoor comfort level is higher, the problem that compressor low pressure drops too fast and leads to heat exchanger frosting and compressor liquid attack among the prior art after the air conditioning defrosting effectively has been solved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (11)
1. An air conditioner control method, the air conditioner comprising: compressor, cross valve, outdoor heat exchanger, indoor heat exchanger, its characterized in that, the air conditioner still includes: one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor; the air conditioner control method includes:
after the air conditioner is defrosted, controlling the compressor to start;
detecting suction pressure and outdoor environment temperature parameters of the compressor;
and controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the outdoor environment temperature parameters.
2. The method of claim 1, wherein the bypass branch comprises: one end of the exhaust bypass branch is connected with the first connecting point, the other end of the exhaust bypass branch is connected with an exhaust port of the compressor, one end of the air suction bypass branch is connected with a second connecting point on the exhaust bypass branch, and the other end of the air suction bypass branch is connected with an air suction port of the compressor; the air conditioner further includes: a first control valve located between the second connection point and the suction port; a second control valve located between the first connection point and the second connection point.
3. The method of claim 2, wherein controlling the opening and closing of the bypass branch and the operation of the compressor based on the suction pressure and the outdoor ambient temperature parameters comprises:
determining a target pressure value according to the outdoor environment temperature parameter;
and controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the target pressure value.
4. The method of claim 3, wherein determining a target pressure value based on the outdoor ambient temperature parameter comprises:
calculating the dew point temperature of the outdoor environment according to the outdoor environment temperature parameter;
determining a pressure correction value according to the outdoor environment dew point temperature;
and calculating the target pressure value according to the outdoor environment dew point temperature and the pressure correction value.
5. The method of claim 3, wherein controlling the bypass branch on/off and the operation of the compressor based on the suction pressure and the target pressure value comprises:
judging whether the suction pressure is less than or equal to the target pressure value or not;
if yes, controlling the compressor to stop starting, and controlling the second control valve to be opened;
otherwise, controlling the compressor to continue to start.
6. The method of claim 5, further comprising, after controlling the second control valve to open:
judging whether the suction pressure reaches a preset condition or not;
if yes, controlling the first control valve to open;
otherwise, controlling the second control valve to close and controlling the compressor to continue to start.
7. The method of claim 6, further comprising, after controlling the first control valve to open:
determining whether an operating frequency of the compressor reaches a target operating frequency;
if yes, controlling the first electromagnetic valve and the second control valve to be closed, and controlling the compressor to continue to start;
otherwise, controlling the compressor to start continuously.
8. The method of claim 6, wherein the preset condition comprises at least one of: the suction pressure keeps a descending trend, and the suction pressure is less than or equal to the target pressure value.
9. An air conditioner control device, an air conditioner comprising: compressor, cross valve, outdoor heat exchanger, indoor heat exchanger, its characterized in that, the air conditioner still includes: one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor; the air conditioning control device includes:
the starting module is used for controlling the compressor to start after the air conditioner is defrosted;
the detection module is used for detecting the suction pressure of the compressor and the outdoor environment temperature parameter;
and the control module is used for controlling the on-off of the bypass branch and the operation of the compressor according to the suction pressure and the outdoor environment temperature parameters.
10. The utility model provides an air conditioner, includes compressor, cross valve, outdoor heat exchanger, indoor heat exchanger, its characterized in that still includes: one end of the bypass branch is connected with a first connecting point on a pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the other end of the bypass branch is respectively connected with an air suction port and an air exhaust port of the compressor; the air conditioning control apparatus according to claim 9.
11. A storage medium containing computer-executable instructions for performing the air conditioning control method of any one of claims 1 to 8 when executed by a computer processor.
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| CN202211399369.5A CN115717787A (en) | 2022-11-09 | 2022-11-09 | Air conditioner control method and device and air conditioner |
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| CN202211399369.5A CN115717787A (en) | 2022-11-09 | 2022-11-09 | Air conditioner control method and device and air conditioner |
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