CN112665098A - Air conditioner pipeline pressure control method, controller and air conditioner - Google Patents
Air conditioner pipeline pressure control method, controller and air conditioner Download PDFInfo
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Abstract
The application relates to an air conditioner pipeline pressure control method, a controller and an air conditioner, wherein the air conditioner pipeline pressure control method comprises the steps of determining an operation mode of the air conditioner and obtaining a pressure value of an outdoor unit connecting pipe; the operation mode of the air conditioner comprises a cooling mode and a heating mode; and controlling the unit according to the current operation mode and the preset value range of the pressure value so as to maintain the pressure of the air-conditioning pipeline within a safe range. This application is through increasing pressure measurement at the off-premises station, a pressure for detecting system operation back, can update the old connecting line of online continuous project of many online, because old pipeline probably is according to the operating pressure design of refrigerant such as R22, normal R410A refrigerant system design pressure is greater than R22 refrigerant system design pressure, increase pipeline pressure measurement, can guarantee that the pressure adjustment during the system operation does not surpass the maximum pressure that the connecting pipe can bear, avoid appearing refrigerant leakage and other safety problems.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner pipeline pressure control method, a controller and an air conditioner.
Background
The multi-split air conditioner is a type of central air conditioner, commonly called as 'one split multi', and refers to a primary refrigerant air conditioning system in which one outdoor unit is connected with two or more indoor units through a pipe, the outdoor side adopts an air cooling heat exchange mode, and the indoor side adopts a direct evaporation heat exchange mode. The multi-split system is widely applied to small and medium-sized buildings and part of public buildings at present. The multi-split air conditioner integrates multiple technologies, such as a one-to-multiple technology, an intelligent control technology, a multiple health technology, an energy-saving technology, a network control technology and the like, and meets the requirements of consumers on comfort, convenience and the like. The commercial multi-split air-conditioning system is developed to date, the former generation of R22 multi-split air-conditioning system is put into use for more than ten years, and the invention of performance, energy efficiency and reliability thereof is obviously behind the current R410A multi-split air-conditioning system. At present, the market has great R22 multi-online updating requirement.
In the related art, since the piping of the multi-split air conditioning system is complicated, if the R410A multi-split air conditioning system uses old piping of the R22 system, the built-in structure of the owner needs to be destroyed, and the work load is large and the cost is high. If the original piping system is to be reserved, the pressure of the refrigerant coming out of the outdoor unit cannot be controlled within the piping pressure-bearing range, and if the pressure of the refrigerant exceeds the piping pressure-bearing range, the refrigerant leakage is caused to cause a safety problem.
Disclosure of Invention
In view of the above, an object of the present invention is to overcome the disadvantages of the prior art, and to provide a method, a controller and an air conditioner for controlling pressure of an air conditioning pipeline, so as to solve the problem of refrigerant leakage caused by refrigerant pressure exceeding a pressure-bearing range of a piping when an old piping of an R22 system is used by an R410A multi-split system to retain an original piping system in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: an air conditioner pipeline pressure control method comprises the following steps:
determining an operation mode of an air conditioner and acquiring a pressure value of an outdoor unit connecting pipe; the operation mode of the air conditioner comprises a cooling mode and a heating mode;
and controlling the unit according to the current operation mode and the preset value range of the pressure value so as to maintain the pressure of the air-conditioning pipeline within a safe range.
Further, the obtaining the pressure value includes:
and acquiring a pressure value detected by a high-pressure sensor configured on the air conditioner outdoor unit.
Further, the controlling the unit according to the current operation mode and the preset value range where the pressure value is located includes:
a first regulating valve is arranged on an exhaust pipeline connected with the indoor unit and the outdoor unit, and a second regulating valve is arranged on an air return pipeline;
when the operation mode is a refrigeration mode, if the pressure value is less than or equal to a first preset value, the unit normally operates without adjustment; if the pressure value is greater than the first preset value and less than or equal to the second preset value, the first regulating valve is reduced by a preset step number; if the pressure value is larger than a second preset value, increasing the number of preset steps of the second regulating valve;
when the operation mode is the heating mode, if the pressure value is less than or equal to a third preset value, the unit normally operates without adjustment; if the pressure value is greater than a third preset value and less than or equal to a first preset value, reducing the frequency of the compressor; and if the pressure value is greater than a first preset value, controlling the compressor to stop working.
Further, when the operation mode is a cooling mode, the method further comprises the following steps:
and if the pressure value is still greater than the first preset value after the first preset time period passes after the first electromagnetic valve or the second electromagnetic valve is adjusted, adjusting the frequency of the compressor.
Further, the conditioning compressor includes:
when the pressure value is greater than a fifth preset value and less than or equal to a sixth preset value, reducing the frequency of the compressor by a first value;
when the pressure value is larger than a sixth preset value and smaller than or equal to a seventh preset value, reducing the frequency of the compressor by a second value;
when the pressure value is greater than a seventh preset value and less than or equal to an eighth preset value, reducing the frequency of the compressor by a third value;
wherein the first value is less than the second value, and the second value is less than the third value.
Further, still include:
and after the frequency of the compressor is adjusted, if the pressure value still exceeds the first preset value within a second preset time period, controlling the compressor to stop working.
The present application provides a controller comprising:
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of the method of any of the above embodiments.
The application provides an air conditioner, includes: indoor set and off-premises station, the off-premises station includes:
the controller provided in the above embodiment; and
the system comprises a compressor, a high-pressure sensor, an oil separator, a four-way valve, a condenser, a plate type heat exchanger, a vapor-liquid separator and an adjusting module, wherein the compressor, the high-pressure sensor, the oil separator, the four-way valve, the condenser, the plate type heat exchanger, the vapor-liquid separator and the adjusting module are connected to form a refrigerant circulating loop;
the adjusting module is used for adjusting the operation condition of the unit under the control of the controller so as to maintain the pressure of the air conditioning pipeline within a safe range.
Furthermore, the refrigerant circulation loop comprises an exhaust pipeline and an air return pipeline, and the exhaust pipeline and the air return pipeline are respectively provided with a valve for controlling the on-off of the pipeline and a pressure detection device for detecting the pressure of the pipeline.
Further, the adjusting module includes:
the device comprises a first pressure detection device, a second pressure detection device, a first valve, a second valve, a first regulating valve and a second regulating valve;
the first valve and the first pressure detection device are arranged on the exhaust pipeline, and the second valve and the second pressure detection device are arranged on the air return pipeline; the first regulating valve and the second regulating valve are arranged between the condenser and the plate heat exchanger.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the method of the application provides an air conditioner pipeline pressure control method, a controller and an air conditioner, wherein the air conditioner pipeline pressure control method comprises the steps of determining an operation mode of the air conditioner and obtaining a pressure value of an outdoor unit connecting pipe; the operation mode of the air conditioner comprises a cooling mode and a heating mode; and controlling the unit according to the current operation mode and the preset value range of the pressure value so as to maintain the pressure of the air-conditioning pipeline within a safe range. This application is through increasing pressure measurement at the off-premises station, a pressure for detecting system operation back, can update the old connecting line of online continuous project of many online, because old pipeline probably is according to the operating pressure design of refrigerant such as R22, normal R410A refrigerant system design pressure is greater than R22 refrigerant system design pressure, increase pipeline pressure measurement, can guarantee that the pressure adjustment during the system operation does not surpass the maximum pressure that the connecting pipe can bear, avoid appearing refrigerant leakage and other safety problems.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an air conditioner according to the present invention;
FIG. 2 is a schematic flow chart of an air conditioning pipeline pressure control method provided by the invention;
fig. 3 is a schematic mechanism diagram of the controller provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
A specific method for controlling the pressure of the air conditioning circuit provided in the embodiment of the present application is described below with reference to the accompanying drawings.
So as to facilitate better understanding of the scheme of the embodiment of the method of the application. An embodiment of an air conditioner flow path is first provided, as shown in fig. 1, and fig. 1 is a schematic structural diagram of a refrigerant circulation loop between an indoor unit and an outdoor unit provided in the present application.
As shown in fig. 1, the present application provides an air conditioner including: indoor set 1 and off-premises station 2, off-premises station 2 includes:
the system comprises a controller, a compressor 21, a high-pressure sensor 22, an oil separator 23, a four-way valve 24, a condenser 25, a plate heat exchanger 26, a vapor-liquid separator 27 and a regulating module (not shown in the figure), wherein the compressor 21, the high-pressure sensor 22, the oil separator 23, the four-way valve 24, the condenser 25, the plate heat exchanger 26, the vapor-liquid separator 27 and the regulating module are connected to form a refrigerant circulating loop;
the adjusting module is used for adjusting the operation condition of the unit under the control of the controller so as to maintain the pressure of the air conditioning pipeline within a safe range.
Furthermore, the refrigerant circulation loop comprises an exhaust pipeline and an air return pipeline, and the exhaust pipeline and the air return pipeline are respectively provided with a valve for controlling the on-off of the pipeline and a pressure detection device for detecting the pressure of the pipeline.
Further, the adjusting module includes:
a first pressure detection device 201, a second pressure detection device 202, a first valve 203, a second valve 204, a first regulation valve 205, and a second regulation valve 206;
the first valve 203 and the first pressure detection device 201 are arranged on the exhaust pipeline, and the second valve 204 and the second pressure detection device 202 are arranged on the return pipeline; the first regulating valve 205 and the second regulating valve 206 are arranged between the condenser 25 and the plate heat exchanger 26.
An oil return port of the oil separator 23 is connected to an air suction port of the compressor 21, the four-way valve 24 is communicated with the oil separator 23, a high-pressure sensor 22 is arranged on a pipeline between the four-way valve 24 and the oil separator 23, the condenser 25 is connected with the plate heat exchanger 26 through a first regulating valve 205 and a second regulating valve 206, the plate heat exchanger 26 and the condenser 25 are communicated with the four-way valve 24, and an outlet of the gas-liquid separator is communicated with the air suction port of the compressor 21.
The adjusting module provided by the application is used for being controlled by the controller to enable the air conditioner to execute operation control of the unit according to the working state of the unit. The pressure adjustment during the operation of the system is ensured not to exceed the maximum pressure which can be borne by the connecting pipe, and the refrigerant leakage and other safety problems are avoided.
The first regulating valve 205 and the second regulating valve 206 in the dispensing module can correspondingly regulate the pressure of the pipeline, and the first pressure detection device 201 and the second pressure detection device 202 can close the first valve 203 and the second valve 204 when the pressure is abnormal and the first regulating valve 205 and the second regulating valve 206 are not regulated to work, so that the unit is shut down and the pipeline is protected.
As shown in fig. 2, the method for controlling the pressure of the air conditioning pipeline provided in the embodiment of the present application includes:
s101, determining an operation mode of the air conditioner and acquiring a pressure value of a connecting pipe of the outdoor unit 2; the operation mode of the air conditioner comprises a cooling mode and a heating mode;
firstly, the current operation mode of the air conditioner is determined to be a cooling mode or a heating mode, and it should be noted that the operation control is different according to different operation modes. The pressure value of the connecting pipe is collected by the system high pressure sensor 22.
And S102, controlling the unit according to the current operation mode and the preset value range of the pressure value so as to maintain the pressure of the air conditioning pipeline within a safe range.
It can be understood that the pressure value is divided into a plurality of grades, contains a plurality of preset values, and different operation modes and the grade of pressure value are different in different operation modes, and the operating condition of unit is different, and the operating condition of unit includes: normal working state, high-pressure overvoltage working state. Low pressure over pressure operating conditions may also be included. The low pressure overpressure operating condition indicates a lack of refrigerant in the refrigerant circulation loop.
If the unit is in a normal working state, the unit is not required to be adjusted and continues to operate; if the unit has a high-pressure overpressure state, the pressure needs to be regulated and controlled.
The working principle of the air conditioner pipeline pressure control method is as follows: this application is through increasing pressure detection device in the liquid pipe of off-premises station 2 and trachea department, a pressure after the detecting system operation, can update the old connecting line of many online continuous projects, because old pipeline probably is according to the operating pressure design of refrigerant such as R22, normal R410A refrigerant system design pressure is greater than R22 refrigerant system design pressure, increase pipeline pressure detection device, can guarantee that the pressure adjustment during the system operation does not surpass the maximum pressure that the connecting pipe can bear, avoid appearing refrigerant leakage and other safety problems.
In some embodiments, the obtaining a pressure value includes:
the pressure value detected by the high pressure sensor 22 provided in the outdoor unit 2 is acquired.
In some embodiments, the determining the working state of the unit according to the current operation mode and the pressure value includes:
when the operation mode is a refrigeration mode, if the pressure value is less than or equal to a first preset value, the unit is in a normal operation state; if the pressure value is greater than a first preset value and less than or equal to a second preset value, the unit is in a high-pressure overvoltage operation state; if the pressure value is larger than a second preset value, the unit is in a high-pressure overvoltage operation state;
when the operation mode is a heating mode, if the pressure value is greater than a third preset value and less than or equal to the third preset value, the unit is in a normal operation state; if the pressure value is greater than a third preset value and less than or equal to a first preset value, the unit is in a high-pressure overvoltage operation state; and if the pressure value is greater than the first preset value, the unit is in a high-pressure overpressure operation state.
In specific applications, the pressure condition can be determined according to the pressure value detected by the high pressure sensor 22, and the operation states of the units are different according to different ranges of the pressure value in a plurality of preset values. And the third preset value comprises a first sub-preset value and a second sub-preset value, and the first sub-preset value is smaller than the second sub-preset value. The first preset value is smaller than the second preset value, the second preset value is smaller than the third preset value, and the first preset value, the second preset value and the third preset value are different levels. And in the refrigerating mode, the pressure range smaller than the first preset value is a safe pressure range. In the heating mode, the levels smaller than or equal to the first sub-preset value, larger than the first sub-preset value and smaller than or equal to the second sub-preset value, and larger than the third preset value and smaller than or equal to the first preset value are different.
The controlling the unit according to the current operation mode and the preset value range where the pressure value is located comprises the following steps:
a first regulating valve 205 is arranged on an exhaust pipeline connecting the indoor unit 1 and the outdoor unit 2, and a second regulating valve 206 is arranged on a return pipeline;
when the operation mode is a refrigeration mode, if the pressure value is less than or equal to a first preset value, the unit normally operates without adjustment; if the pressure value is greater than the first preset value and less than or equal to the second preset value, the first regulating valve 205 is adjusted to be smaller by a preset step number; if the pressure value is greater than a second preset value, increasing the second regulating valve 206 by a preset number of steps;
when the operation mode is the heating mode, if the pressure value is less than or equal to the first sub-preset value, the unit normally operates without adjustment; if the pressure value is greater than the first sub-preset value and less than or equal to the second sub-preset value, the unit normally operates without adjustment; if the pressure value is greater than the third preset value and less than or equal to the first preset value, reducing the frequency of the compressor 21; and if the pressure value is greater than the first preset value, controlling the compressor 21 to stop working.
It should be noted that, in the heating mode, although the pressure value is greater than the first sub-preset value and less than or equal to the second sub-preset value, the unit normally operates without adjustment, but approaches the high-pressure and overpressure state. The preset number of steps for decreasing the first regulating valve 205 is different from the preset number of steps for increasing the second regulating valve 206, the preset number of steps is not fixed, and the number of steps for adjusting is different according to the difference of pressure values.
Preferably, when the operation mode is a cooling mode, the method further comprises:
and if the pressure value is still greater than the first preset value after the first preset time period passes after the first electromagnetic valve and the second electromagnetic valve are adjusted, adjusting the frequency of the compressor 21.
The conditioning compressor 21 includes:
when the pressure value is greater than a fifth preset value and less than or equal to a sixth preset value, reducing the frequency of the compressor 21 by a first value;
when the pressure value is greater than a sixth preset value and less than or equal to a seventh preset value, reducing the frequency of the compressor 21 by a second value;
when the pressure value is greater than a seventh preset value and less than or equal to an eighth preset value, reducing the frequency of the compressor 21 by a third value;
wherein the first value is less than the second value, and the second value is less than the third value.
In some embodiments, the air conditioner pipeline pressure control method provided by the present application further includes:
after adjusting the compressor 21, if the pressure value still exceeds the first preset value within a second preset time period, controlling the compressor 21 to stop working.
The present application provides a specific example of an embodiment,
in the cooling mode:
when the pressure value of the high-pressure sensor 22 is less than or equal to aMPa, the unit normally works without adjustment;
when the pressure value of the high-pressure sensor 22 after the oil content is more than aMPa and less than or equal to bMPa, the step number of the first regulating valve 205 is reduced by x steps on the original basis, the working state of the second regulating valve 206 and the compressor 21 is unchanged, the pressure loss in front of the first valve 203 is increased, and the pressure of the first valve 203 is reduced to a safe range;
when bMPa is less than the pressure value of the high-pressure sensor 22 after oil separation, the step number of the second regulating valve 206 is increased by y steps on the original basis, the working states of the first regulating valve 205 and the compressor 21 are unchanged, and a part of pressure on the high-pressure side is unloaded to low pressure, so that the pressure of a small valve is ensured to be in a safe range;
if the pressure at the first valve 203 cannot be controlled within the safe range by the above two methods, the first regulating valve 205 and the second regulating valve 206 are not adjusted, and the operation condition of the compressor 21 is adjusted, that is, the frequency of the compressor 21 is decreased, and the adjustment method of the compressor 21 is as shown in the following table 1:
TABLE 1 compressor modulation
It should be noted that: A. b, C size relationship: a is more than B and less than C.
After the frequency of the compressor 21 is adjusted, if the refrigerant pressure at the outlet of the outdoor unit 2 is detected to exceed the aMPa for t minutes, the compressor 21 is controlled to stop working, and the system is stopped and protected.
A heating mode:
if the pressure value of a high-pressure sensor 22 at an oil separation outlet is less than or equal to fMPa, the system normally operates;
when the pressure value of the high-pressure sensor 22 at the oil separation outlet is greater than fMPa and less than or equal to gMPa, the frequency of the compressor 21 is maintained so as to maintain the current capacity of the system;
when the gMPa is less than the pressure value of the high-pressure sensor 22 at the oil separation outlet and less than or equal to aMPa, reducing the frequency of the compressor 21 to reduce the capacity of the system;
and when the pressure value of the high-pressure sensor 22 at the oil separation outlet is more than aMPa, stopping the system for protection.
In some embodiments, as shown in fig. 3, the present application provides a controller 3 comprising:
a memory 301 having an executable program stored thereon;
a processor 302 for executing the executable program in the memory 301 to perform the following steps:
determining the operation mode of the air conditioner and acquiring the pressure value of a connecting pipe of the outdoor unit 2; the operation mode of the air conditioner comprises a cooling mode and a heating mode;
and controlling the unit according to the current operation mode and the preset value range of the pressure value so as to maintain the pressure of the air-conditioning pipeline within a safe range.
In summary, the present invention provides an air conditioner pipeline pressure control method, a controller and an air conditioner, where the air conditioner pipeline pressure control method includes determining an operation mode of the air conditioner and obtaining a pressure value of an outdoor unit connecting pipe; the operation mode of the air conditioner comprises a cooling mode and a heating mode; and controlling the unit according to the current operation mode and the preset value range of the pressure value so as to maintain the pressure of the air-conditioning pipeline within a safe range. This application is through increasing pressure measurement at the off-premises station, a pressure for detecting system operation back, can update the old connecting line of online continuous project of many online, because old pipeline probably is according to the operating pressure design of refrigerant such as R22, normal R410A refrigerant system design pressure is greater than R22 refrigerant system design pressure, increase pipeline pressure measurement, can guarantee that the pressure adjustment during the system operation does not surpass the maximum pressure that the connecting pipe can bear, avoid appearing refrigerant leakage and other safety problems.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. An air conditioner pipeline pressure control method is characterized by comprising the following steps:
determining an operation mode of an air conditioner and acquiring a pressure value of an outdoor unit connecting pipe; the operation mode of the air conditioner comprises a cooling mode and a heating mode;
and controlling the unit according to the current operation mode and the preset value range of the pressure value so as to maintain the pressure of the air-conditioning pipeline within a safe range.
2. The method of claim 1, wherein said obtaining a pressure value comprises:
and acquiring a pressure value detected by a high-pressure sensor configured on the air conditioner outdoor unit.
3. The method according to claim 1, wherein the controlling the unit according to the current operation mode and the preset value range of the pressure value comprises:
a first regulating valve is arranged on an exhaust pipeline connected with the indoor unit and the outdoor unit, and a second regulating valve is arranged on an air return pipeline;
when the operation mode is a refrigeration mode, if the pressure value is less than or equal to a first preset value, the unit normally operates without adjustment; if the pressure value is greater than the first preset value and less than or equal to the second preset value, the first regulating valve is reduced by a preset step number; if the pressure value is larger than a second preset value, increasing the number of preset steps of the second regulating valve;
when the operation mode is the heating mode, if the pressure value is less than or equal to a third preset value, the unit normally operates without adjustment; if the pressure value is greater than a third preset value and less than or equal to a first preset value, reducing the frequency of the compressor; and if the pressure value is greater than a first preset value, controlling the compressor to stop working.
4. The method of claim 3, wherein when the operating mode is a cooling mode, further comprising:
and if the pressure value is still greater than the first preset value after the first preset time period passes after the first electromagnetic valve or the second electromagnetic valve is adjusted, adjusting the frequency of the compressor.
5. The method of claim 4, wherein the conditioning the compressor comprises:
when the pressure value is greater than a fifth preset value and less than or equal to a sixth preset value, reducing the frequency of the compressor by a first value;
when the pressure value is larger than a sixth preset value and smaller than or equal to a seventh preset value, reducing the frequency of the compressor by a second value;
when the pressure value is greater than a seventh preset value and less than or equal to an eighth preset value, reducing the frequency of the compressor by a third value;
wherein the first value is less than the second value, and the second value is less than the third value.
6. The method of claim 5, further comprising:
and after the frequency of the compressor is adjusted, if the pressure value still exceeds the first preset value within a second preset time period, controlling the compressor to stop working.
7. A controller, comprising:
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of the method of any one of claims 1-6.
8. An air conditioner, comprising: indoor set and off-premises station, the off-premises station includes:
the controller of claim 7; and
the system comprises a compressor, a high-pressure sensor, an oil separator, a four-way valve, a condenser, a plate type heat exchanger, a vapor-liquid separator and an adjusting module, wherein the compressor, the high-pressure sensor, the oil separator, the four-way valve, the condenser, the plate type heat exchanger, the vapor-liquid separator and the adjusting module are connected to form a refrigerant circulating loop;
the adjusting module is used for adjusting the operation condition of the unit under the control of the controller so as to maintain the pressure of the air conditioning pipeline within a safe range.
9. The air conditioner according to claim 8,
the refrigerant circulation loop comprises an exhaust pipeline and an air return pipeline, wherein valves for controlling the on-off of the pipelines and a pressure detection device for detecting the pressure of the pipelines are arranged on the exhaust pipeline and the air return pipeline.
10. The air conditioner of claim 9, wherein the conditioning module comprises:
the device comprises a first pressure detection device, a second pressure detection device, a first valve, a second valve, a first regulating valve and a second regulating valve;
the first valve and the first pressure detection device are arranged on the exhaust pipeline, and the second valve and the second pressure detection device are arranged on the air return pipeline; the first regulating valve and the second regulating valve are arranged between the condenser and the plate heat exchanger.
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