CN110285550B

CN110285550B - Air conditioner, operation control method thereof and computer readable storage medium

Info

Publication number: CN110285550B
Application number: CN201910578089.2A
Authority: CN
Inventors: 王立友; 马焕桥
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-12-22
Anticipated expiration: 2039-06-28
Also published as: CN110285550A

Abstract

The invention provides an air conditioner, an operation control method thereof and a computer readable storage medium. Wherein, the air conditioner includes: a compressor; the economizer is connected with the compressor through a pipeline; the injection valve is arranged on the pipeline; a memory for storing a computer program; a processor for executing a computer program to implement: acquiring at least one operating parameter and an outdoor environment temperature parameter of the air conditioner based on the starting of the compressor and the condition that the air conditioner is in a heating mode; controlling to open the injection valve based on the condition that any one of at least one operation parameter and the outdoor environment temperature parameter is in a set interval corresponding to the parameter, and recording the parameter as a specific parameter; whether to close the injection valve is determined based on at least one of the operating parameter and the remaining parameters of the outdoor ambient temperature parameter, excluding the specific parameter. The air conditioner has low failure rate and can stably run for a long time under the low-temperature working condition.

Description

Air conditioner, operation control method thereof and computer readable storage medium

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner, an air conditioner operation control method and a computer readable storage medium.

Background

In recent years, the atmosphere on which people live is seriously damaged by the super-concentration haze in the north, the daily life of people is threatened all the time, and the environment is improved to an extent that the environment is not slow enough, so that the 'coal-to-electricity' is gradually valued by the nation and is widely popularized by users. In order to realize the ambitious goal of 'blue sky guard war', a higher technical level is specially provided for 'coal changes electricity' series products, the products can stably run particularly in an ultralow temperature (-30 ℃) environment, and higher requirements are provided for ultralow temperature working condition heating capacity and energy efficiency.

With the improvement of living standard and the enhancement of energy-saving consciousness of people, the air conditioner has the characteristics of energy conservation, flexible control, easy installation and maintenance and the like, and has been moved into general families and is more and more widely applied. However, in a low temperature state, due to the low evaporation temperature, the evaporator is prone to frost formation, and other factors, the heat absorbed by the refrigerant from the air is greatly reduced, the heating effect is deteriorated, and the use effect of the user is affected. In the related art, the above problems are solved by adding an economizer and a control valve in an air conditioner. However, the existing air conditioner cannot ensure that the control valve is closed in time according to the actual operation condition of the air conditioner, so that the operation failure rate of the compressor and the air conditioner is high, and the normal operation of the air conditioner cannot be ensured.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the present invention proposes an air conditioner.

A second aspect of the present invention provides an air conditioner operation control method.

A third aspect of the invention provides a computer-readable storage medium.

In view of the above, a first aspect of the present invention provides an air conditioner, including: a compressor; the economizer is connected with the compressor through a pipeline; the injection valve is arranged on the pipeline; a memory for storing a computer program; a processor for executing a computer program to implement: acquiring at least one operating parameter and an outdoor environment temperature parameter of the air conditioner based on the starting of the compressor and the condition that the air conditioner is in a heating mode; controlling to open the injection valve based on the condition that any one of at least one operation parameter and the outdoor environment temperature parameter is in a set interval corresponding to the parameter, and recording the parameter as a specific parameter; whether to close the injection valve is determined based on at least one of the operating parameter and the remaining parameters of the outdoor ambient temperature parameter, excluding the specific parameter.

The invention provides an air conditioner comprising: a compressor, an economizer, an injection valve, a memory, and a processor. Through setting up the economizer for the economizer is connected with the compressor through the pipeline, and like this, when the injection valve was opened, the gaseous refrigerant after the economizer separation can direct injection to the compressor in, has improved the effect of air injection enthalpy addition, can improve the super-cooled rate of system simultaneously, strengthens the heat transfer ability of unit, improves air conditioning system because the not enough problem of heat transfer ability that low temperature leads to, thereby improves whole air conditioning system's heat transfer effect. In addition, when the injection valve is closed, the gaseous refrigerant separated by the economizer is blocked and cannot enter the compressor. Therefore, the opening and closing of the injection valve can be set in a targeted manner according to the specific actual use condition of the air conditioner, so that the purpose of controlling the on-off of the economizer and the compressor is achieved.

Further, the processor is for executing the computer program to implement: at least one operating parameter and an outdoor environment temperature parameter of the air conditioner are obtained based on the compressor being turned on and the air conditioner being in a heating mode. When the air conditioner is in a cooling mode, in a defrosting process, in a standby mode and in a shutdown mode, the injection valve is in a closed state. And only when the conditions that the compressor is started and the air conditioner is in a heating mode are met, at least one operating parameter and an outdoor environment temperature parameter of the air conditioner can be obtained, and effective data support is further provided for subsequently starting the injection valve. The arrangement can avoid the condition that the running parameters and the outdoor environment temperature parameters of the air conditioner are obtained under the condition that the compressor is started and the air conditioner is out of a heating mode, so that the effectiveness and the purposiveness of enhanced vapor injection can be ensured. The situations that the air conditioner has operation faults and energy consumption is increased due to the fact that the economizer is communicated with the compressor in a wrong mode are avoided.

Further, the processor is for executing the computer program to implement: and controlling to open the injection valve based on the condition that any one of at least one operation parameter and the outdoor environment temperature parameter is in the set interval corresponding to the parameter, and recording the parameter as a specific parameter, namely, taking the actual operation parameter of the air conditioner and the outdoor environment temperature parameter as the basis for opening the injection valve together, and controlling to open the injection valve as long as any one of the at least one operation parameter and the outdoor environment temperature parameter is in the set interval corresponding to the parameter. The setting combines the self running condition of the air conditioner with the outdoor environment condition, enriches the conditions and basis for controlling the opening of the injection valve, and further ensures that the opening of the injection valve has practical and feasible significance.

Further, the processor is for executing the computer program to implement: whether to close the injection valve is determined based on at least one of the operating parameter and the remaining parameters of the outdoor ambient temperature parameter, excluding the specific parameter. The setting is combined with the setting for controlling the opening of the injection valve, so that the opening and closing of the injection valve are controlled on the basis of the combination of the self operation parameter and the outdoor environment temperature parameter of the air conditioner, and therefore, the condition that the compressor and the air conditioner are in a specific condition (such as higher outdoor environment temperature, lower operation frequency of the compressor, higher operation pressure of the air conditioner and higher three-phase current of the compressor) to open the injection valve to cause the compressor and the air conditioner to break down can be avoided, and the condition that the air conditioner fails to be caused by not closing the injection valve in time according to the current operation condition of the air conditioner can be avoided.

The structure setting of air conditioner has guaranteed that the injection valve is opened and the validity of closing, has promoted the accurate nature and the reliability of air conditioner operation control, so, has the effect that improves air conditioner low temperature heating capacity and efficiency, can ensure the long-term steady operation of unit under the low temperature operating mode.

According to the air conditioner of the invention, the following additional technical features can be provided:

in the above technical solution, preferably, the at least one operation parameter includes any one of or a combination of the following: the running frequency of the compressor, the running pressure of the air conditioner and the three-phase current of the compressor.

In the technical scheme, when at least one operation parameter is one, the operation parameter is any one of the following parameters: the running frequency of the compressor, the running pressure of the air conditioner and the three-phase current of the compressor. When at least one operation parameter is multiple, the multiple operation parameters are multiple parameters among the operation frequency of the compressor, the operation pressure of the air conditioner, and the three-phase current of the compressor, for example, the number of the operation parameters is two, two operation parameters are the operation frequency of the compressor and the operation pressure of the air conditioner, respectively, and for example, the number of the operation parameters is three, and three operation parameters are the operation frequency of the compressor, the operation pressure of the air conditioner, and the three-phase current of the compressor, which are not exemplified herein.

In any of the above technical solutions, preferably, the processor executes a process of controlling to open the injection valve based on a condition that one of the at least one operation parameter and the outdoor environment temperature parameter is in a setting range corresponding to the one parameter, and the process includes: determining that the running frequency is in a first set frequency interval based on at least one running parameter comprising the running frequency of the compressor, and controlling to open the injection valve; or determining that the operating pressure is in a first set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and controlling to open the injection valve; or determining that any phase current in the three-phase current is in a first set current interval based on at least one operation parameter including the three-phase current of the compressor, and controlling to open the injection valve; or determining that the outdoor environment temperature parameter is in a first set temperature interval, and controlling to open the injection valve.

In the technical scheme, the operation frequency is determined to be in a first set frequency interval based on at least one operation parameter including the operation frequency of the compressor, and the injection valve is controlled to be opened. When a compressor (such as a variable frequency compressor) of a unit operates at a low frequency, an injection medium enters, certain impact is caused on internal components of the compressor, and normal operation of the compressor operating at a low speed is influenced, so that a compressor fault or an application program step-out fault can be reported. Therefore, when the operating frequency of the compressor is required to be greater than or equal to the lower limit value of the first set frequency interval, the injection valve is controlled to be opened, so that the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner under the condition of ensuring the normal operation of the air conditioner are realized, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one operating parameter including an operating pressure of the air conditioner, it is determined that the operating pressure (e.g., a high pressure) is in a first set pressure interval, and the injection valve is controlled to be opened. Because the operating pressure of the air conditioner is higher when the unit is under the working conditions of high water outlet temperature and near critical temperature, if the injection valve is opened at the moment, the operating pressure of the system is increased to the upper protection limit of the pressure switch of the air conditioner due to the entering of the injection medium, and the fault protection is realized. Therefore, when the operating pressure of the air conditioner is less than or equal to the upper limit value of the first set pressure interval, the injection valve is controlled to be opened, so that the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner under the condition of ensuring the normal operation of the air conditioner are realized, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on the fact that the at least one operation parameter comprises three-phase currents of the compressor, it is determined that any phase current of the three-phase currents is in a first set current interval, and the injection valve is controlled to be opened. Because the value of the three-phase current Ia/Ib/Ic of the running compressor is high when the air conditioner runs under certain working condition conditions, if the injection valve is opened at the moment, the load of the running compressor is increased due to the entering of an injection medium, so that the three-phase current Ia/Ib/Ic exceeds the current value monitored by the printed circuit board to carry out fault protection, the injection valve is controlled to be opened only when the three-phase current Ia/Ib/Ic of the compressor is less than or equal to the upper limit value of the first set current interval, therefore, the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner under the condition of ensuring the normal running of the air conditioner are realized, and the long-term stable running of the unit under the low-temperature working condition is.

Further, the outdoor environment temperature parameter is determined to be in a first set temperature interval, and the injection valve is controlled to be opened. When the outdoor environment temperature is larger than or equal to a certain temperature value, the system pressure, the current and other numerical values of the air conditioner in operation are very high at this time, if the injection medium enters, the current is possibly protected too much, and the system pressure of the air conditioner is protected too much, so that the injection valve is controlled to be opened when the outdoor environment temperature parameter is smaller than or equal to the upper limit value of the first set temperature interval, therefore, the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner under the condition of ensuring the normal operation of the air conditioner are realized, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Meanwhile, the self-operation parameters and the outdoor environment temperature parameters of the air conditioner are jointly used as the basis for opening or not opening the injection valve, so that the injection valve can be opened in a targeted, timely and reasonable manner according to the actual operation condition and the outdoor environment temperature condition of the air conditioner, and the accuracy and the reliability of the operation control of the air conditioner are improved.

In any of the above solutions, preferably, the processor performs the process of determining whether to close the injection valve according to at least one of the operating parameter and the outdoor environment temperature parameter, except for the specific parameter, including: determining that the operation frequency is in a second set frequency interval based on at least one operation parameter comprising the operation frequency of the compressor, and closing the injection valve, wherein the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval; or determining that the operating pressure is in a second set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and closing the injection valve, wherein the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval; or determining that one phase of current in the three-phase current is in a second set current interval based on at least one operation parameter including the three-phase current of the compressor, and closing the injection valve, wherein the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval; or determining that the outdoor environment temperature parameter is in a second set temperature interval, and closing the injection valve, wherein the upper limit value of the first set temperature interval is smaller than the lower limit value of the second set temperature interval.

In the technical scheme, the operation frequency is determined to be in a second set frequency interval based on at least one operation parameter including the operation frequency of the compressor, and the injection valve is closed. That is, the injection valve is opened only when the operating frequency of the compressor is equal to or higher than the lower limit value of the first set frequency interval, and the injection valve is closed when the operating frequency of the compressor is equal to or lower than the upper limit value of the second set frequency interval, and the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval. The arrangement avoids the situation that the compressor cannot normally run due to the fact that the injection valve is opened when the compressor runs under the low frequency. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one operating parameter including an operating pressure of the air conditioner, it is determined that the operating pressure (e.g., high pressure) is in a second set pressure interval, and the injection valve is closed. That is, the injection valve is opened only when the operating pressure of the air conditioner is equal to or lower than the upper limit value of the first set pressure interval, and the injection valve is closed only when the operating pressure of the air conditioner is equal to or higher than the lower limit value of the second set pressure interval, so that the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval. The arrangement avoids the situation that the air conditioner cannot normally operate due to the fact that the injection valve is opened when the air conditioner operates under the working conditions of high water outlet temperature and near critical temperature. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on the at least one operating parameter including three-phase currents of the compressor, it is determined that one of the three-phase currents is in a second set current interval, and the injection valve is closed. That is, when one phase current of the three-phase currents of the compressor is less than or equal to the upper limit value of the first set current interval, the injection valve can be opened, and when one phase current of the three-phase currents of the compressor is greater than or equal to the lower limit value of the second set current interval, the injection valve is closed, and the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval. The arrangement avoids the situation that the air conditioner cannot normally run due to the fact that the injection valve is opened when the three-phase current value of the compressor is higher. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, the outdoor environment temperature parameter is determined to be in a second set temperature interval, and the injection valve is closed. That is, the injection valve is opened only when the outdoor environment temperature parameter is less than or equal to the upper limit value of the first set temperature interval, and the injection valve is closed when the outdoor environment temperature parameter is greater than or equal to the lower limit value of the second set temperature interval, and the upper limit value of the first set temperature interval is smaller than the lower limit value of the second set temperature interval. This setting has avoided opening the injection valve when numerical values such as system pressure, electric current of air conditioner operation are higher, and then the condition that leads to the unable normal operating of air conditioner takes place. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Meanwhile, the self-operation parameters and the outdoor environment temperature parameters of the air conditioner are jointly used as the basis for closing the injection valve, so that the injection valve can be closed in a targeted, timely and reasonable manner according to the actual operation condition and the outdoor environment temperature condition of the air conditioner, and the accuracy and the reliability of the operation control of the air conditioner are improved.

In any of the above technical solutions, preferably, before the processor obtains at least one operating parameter of the air conditioner and the outdoor environment temperature parameter, the method further includes: and determining that the operating frequency of the compressor is in a preset operating frequency interval, and continuously operating for a set time.

In the technical scheme, the operation frequency of the compressor is determined to be in a preset operation frequency interval, and the compressor is continuously operated for a set time, namely, the operation frequency of the compressor is ensured to be in a stable state (for example, the operation frequency is not in an ascending stage or a descending stage), and then at least one operation parameter of the air conditioner and an outdoor environment temperature parameter are obtained, so that the effectiveness, the stability and the reliability of the subsequently obtained parameters can be ensured, and reliable and effective data guarantee is provided for the normal operation of the air conditioner.

In any one of the above technical solutions, preferably, the air conditioner further includes: an indoor heat exchanger; an outdoor heat exchanger; the economizer is communicated with the indoor heat exchanger, the compressor and the outdoor heat exchanger; the first flow control valve is arranged on a pipeline connecting the economizer and the outdoor heat exchanger; and the second flow control valve is arranged on a pipeline connecting the economizer and the indoor heat exchanger.

In this technical solution, the air conditioner further includes: indoor heat exchanger, outdoor heat exchanger, first flow control valve and second flow control valve. When the air conditioner is in a heating mode, high-pressure refrigerant coming out of the compressor enters the indoor heat exchanger, so that heat supply to a room is realized. Two refrigerant branches are divided from a main flow path from the indoor heat exchanger and enter the economizer in a throttled state (a second flow control valve enters the economizer) and an unthrottled state (the refrigerant directly enters the economizer), and the refrigerant which is not throttled enters the economizer after releasing heat in the economizer, is converged with the refrigerant of the main flow path through the first flow control valve and enters the outdoor heat exchanger. The throttled bypass refrigerant is further cooled in the economizer by thermal expansion to reduce the temperature of the un-throttled refrigerant and injected into the compressor as a gaseous refrigerant. The structure improves the effect of enhanced vapor injection, can improve the supercooling degree of the system, enhances the heat exchange capacity of the unit, and improves the problem that the air conditioner is insufficient in heat exchange capacity due to low temperature, thereby improving the heat exchange effect of the whole air conditioning system.

A second aspect of the present invention provides an operation control method for an air conditioner, the air conditioner including a compressor, an economizer, and an injection valve, the injection valve being disposed on a pipeline connecting the compressor and the economizer, the operation control method comprising: acquiring at least one operating parameter and an outdoor environment temperature parameter of the air conditioner based on the starting of the compressor and the condition that the air conditioner is in a heating mode; controlling to open the injection valve based on the condition that any one of at least one operation parameter and the outdoor environment temperature parameter is in a set interval corresponding to the parameter, and recording the parameter as a specific parameter; whether to close the injection valve is determined based on at least one of the operating parameter and the remaining parameters of the outdoor ambient temperature parameter, excluding the specific parameter.

The invention provides an air conditioner operation control method, which is based on the condition that a compressor is started and the air conditioner is in a heating mode, and obtains at least one operation parameter and an outdoor environment temperature parameter of the air conditioner. When the air conditioner is in a cooling mode, in a defrosting process, in a standby mode and in a shutdown mode, the injection valve is in a closed state. And only when the conditions that the compressor is started and the air conditioner is in a heating mode are met, at least one operating parameter and an outdoor environment temperature parameter of the air conditioner can be obtained, and effective data support is further provided for subsequently starting the injection valve. The step arrangement can avoid the condition that the running parameters of the air conditioner and the outdoor environment temperature parameters are obtained under the condition that the compressor is started and the air conditioner is out of the heating mode, so the effectiveness and the purposiveness of the enhanced vapor injection can be ensured. The situations that the air conditioner has operation faults and energy consumption is increased due to the fact that the economizer is communicated with the compressor in a wrong mode are avoided.

Further, based on the condition that any one of the at least one operation parameter and the outdoor environment temperature parameter is in the setting interval corresponding to the parameter, the injection valve is controlled to be opened, and the parameter is recorded as a specific parameter, that is, the actual operation parameter of the air conditioner and the outdoor environment temperature parameter are jointly used as the basis for opening the injection valve, and the injection valve can be controlled to be opened as long as any one of the at least one operation parameter and the outdoor environment temperature parameter is in the setting interval corresponding to the parameter. The step is set to combine the self running condition of the air conditioner with the outdoor environment condition, enriches the conditions and basis for controlling the opening of the injection valve, and further makes the opening of the injection valve have practical and feasible significance.

Further, whether to close the injection valve is determined based on at least one of the operating parameter and the remaining parameters except for the specific parameter among the outdoor ambient temperature parameters. The step is combined with the step of controlling the opening of the injection valve, so that the opening and the closing of the injection valve are controlled on the basis of the combination of the self operation parameter of the air conditioner and the outdoor environment temperature parameter, and therefore, the condition that the compressor and the air conditioner are in a specific condition (such as higher outdoor environment temperature, lower operation frequency of the compressor, higher operation pressure of the air conditioner and higher three-phase current of the compressor) to open the injection valve to cause the compressor and the air conditioner to be in a fault can be avoided, and the condition that the air conditioner is in a fault due to the fact that the injection valve is not closed in time according to the current operation condition of the air conditioner can be avoided.

The air conditioner operation control method ensures the effectiveness of opening and closing of the injection valve, improves the accuracy and reliability of the operation control of the air conditioner, has the effect of improving the low-temperature heating capacity and the energy efficiency of the air conditioner, and can ensure the long-term stable operation of a unit under the low-temperature working condition.

Specifically, in a rare case where two or even more of at least one of the operating parameter of the air conditioner and the outdoor environment temperature parameter are simultaneously in their respective setting sections, that is, the specific parameter is plural, it is determined whether to close the injection valve based on the remaining parameters of the at least one of the operating parameter and the outdoor environment temperature parameter other than the plural specific parameters.

Specifically, the injection valve is a solenoid valve, but of course, the injection valve may be other valve bodies capable of cutting off or opening a pipeline connecting the compressor and the economizer, which is not listed here.

In any of the above technical solutions, preferably, the process of controlling to open the injection valve based on a condition that any one of the at least one operation parameter and the outdoor environment temperature parameter is in a setting interval corresponding to the parameter includes: determining that the running frequency is in a first set frequency interval based on at least one running parameter comprising the running frequency of the compressor, and controlling to open the injection valve; or determining that the operating pressure is in a first set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and controlling to open the injection valve; or determining that one phase of current in the three-phase current is in a first set current interval based on at least one operation parameter including the three-phase current of the compressor, and controlling to open the injection valve; or determining that the outdoor environment temperature parameter is in a first set temperature interval, and controlling to open the injection valve.

Meanwhile, the step sets that the self operation parameter of the air conditioner and the outdoor environment temperature parameter are jointly used as the basis for opening or not opening the injection valve, so that the injection valve can be opened in a targeted, timely and reasonable manner according to the actual operation condition and the outdoor environment temperature condition of the air conditioner, and the accuracy and the reliability of the operation control of the air conditioner are improved.

In any of the above technical solutions, preferably, the step of determining whether to close the injection valve according to at least one of the operating parameter and the outdoor environment temperature parameter, except for the specific parameter, specifically includes: determining that the operation frequency is in a second set frequency interval based on at least one operation parameter comprising the operation frequency of the compressor, and closing the injection valve, wherein the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval; or determining that the operating pressure is in a second set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and closing the injection valve, wherein the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval; or determining that one phase of current in the three-phase current is in a second set current interval based on at least one operation parameter including the three-phase current of the compressor, and closing the injection valve, wherein the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval; or determining that the outdoor environment temperature parameter is in a second set temperature interval, and closing the injection valve, wherein the upper limit value of the first set temperature interval is smaller than the lower limit value of the second set temperature interval.

In the technical scheme, the operation frequency is determined to be in a second set frequency interval based on at least one operation parameter including the operation frequency of the compressor, and the injection valve is closed. That is, the injection valve is opened only when the operating frequency of the compressor is equal to or higher than the lower limit value of the first set frequency interval, and the injection valve is closed when the operating frequency of the compressor is equal to or lower than the upper limit value of the second set frequency interval, and the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval. The step arrangement avoids the situation that the compressor cannot normally run due to the fact that the injection valve is opened when the compressor runs at low frequency. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one operating parameter including an operating pressure of the air conditioner, it is determined that the operating pressure (e.g., high pressure) is in a second set pressure interval, and the injection valve is closed. That is, the injection valve is opened only when the operating pressure of the air conditioner is equal to or lower than the upper limit value of the first set pressure interval, and the injection valve is closed only when the operating pressure of the air conditioner is equal to or higher than the lower limit value of the second set pressure interval, so that the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval. The step arrangement avoids the situation that the air conditioner cannot normally operate due to the fact that the injection valve is opened when the air conditioner operates under the working conditions of high water outlet temperature and near critical temperature. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on the at least one operating parameter including three-phase currents of the compressor, it is determined that one of the three-phase currents is in a second set current interval, and the injection valve is closed. That is, when one phase current of the three-phase currents of the compressor is less than or equal to the upper limit value of the first set current interval, the injection valve can be opened, and when one phase current of the three-phase currents of the compressor is greater than or equal to the lower limit value of the second set current interval, the injection valve is closed, and the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval. The step arrangement avoids the situation that the air conditioner cannot normally run due to the fact that the injection valve is opened when the three-phase current value of the compressor is higher. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

In any of the above technical solutions, preferably, before the step of obtaining at least one operating parameter of the air conditioner and an outdoor environment temperature parameter, the method further includes: and determining that the operating frequency of the compressor is in a preset operating frequency interval, and continuously operating for a set time.

A third aspect of the present invention provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the air conditioner operation control method according to any one of the second aspects, and therefore the computer-readable storage medium has all the advantageous effects of the air conditioner operation control method according to any one of the second aspects.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partial structural view showing an air conditioner according to an embodiment of the present invention;

FIG. 2 shows a schematic diagram of enhanced vapor injection;

fig. 3 is a schematic flow chart illustrating an air conditioner operation control method according to a first embodiment of the present invention;

fig. 4 is a schematic flow chart illustrating an air conditioner operation control method according to a second embodiment of the present invention;

fig. 5 is a flow chart showing a process of controlling an operation of an air conditioner according to the present invention.

Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:

1 air conditioner, 10 compressor, 20 economizer, 30 jet valve, 40 outdoor heat exchanger, 50 first flow control valve, 60 second flow control valve, 70 four-way valve, 80 pressure sensor, 90 low pressure tank, 100 liquid storage tank, 110 filter, 120 low pressure switch, 130 high pressure switch.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The air conditioner 1, an air conditioner operation control method, and a computer-readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 5.

As shown in fig. 1, an embodiment of a first aspect of the present invention proposes an air conditioner 1 including: a compressor 10; the economizer 20, the economizer 20 is connected with the compressor 10 through a pipeline; an injection valve 30 provided in the pipeline; a memory for storing a computer program; a processor for executing a computer program to implement: acquiring at least one operating parameter and an outdoor environment temperature parameter of the air conditioner 1 based on the starting of the compressor 10 and the fact that the air conditioner 1 is in a heating mode; controlling to open the injection valve 30 based on the condition that any one of at least one operation parameter and the outdoor environment temperature parameter is in a set interval corresponding to the parameter, and recording the parameter as a specific parameter; whether to close the injection valve 30 is determined based on at least one of the operating parameters and the remaining parameters except for the specific parameter among the outdoor ambient temperature parameters.

The present invention provides an air conditioner 1 comprising: a compressor 10, an economizer 20, an injection valve 30, a memory, and a processor. Through setting up economizer 20 for economizer 20 is connected with compressor 10 through the pipeline, like this, when injection valve 30 opens, the gaseous refrigerant after economizer 20 separation can directly be jetted to compressor 10 in, has improved the effect of jet enthalpy, can improve the super-cooled rate of system simultaneously, strengthens the heat transfer ability of unit, improves air conditioning system because the not enough problem of heat transfer ability that low temperature leads to, thereby improves whole air conditioning system's heat transfer effect. When the injection valve 30 is closed, the gaseous refrigerant separated by the economizer 20 is blocked and cannot enter the compressor 10. Therefore, the opening and closing of the injection valve 30 can be set in a targeted manner according to the specific practical use condition of the air conditioner 1, so as to achieve the purpose of controlling the on-off of the economizer 20 and the compressor 10.

Further, the processor is for executing the computer program to implement: at least one operating parameter and outdoor ambient temperature parameter of the air conditioner 1 are obtained based on the compressor 10 being turned on and the air conditioner 1 being in the heating mode. The injection valve 30 is in a closed state when the air conditioner 1 is in a cooling mode, during defrosting, when the air conditioner 1 is in a standby mode, and when the air conditioner 1 is in a stop mode. Only when the conditions that the compressor 10 is turned on and the air conditioner 1 is in the heating mode are met, at least one operating parameter and an outdoor environment temperature parameter of the air conditioner 1 are obtained, and effective data support is provided for subsequently turning on the injection valve 30. This arrangement can avoid the occurrence of the situation in which the operating parameters of the air conditioner 1 and the outdoor ambient temperature parameters are obtained under the condition that the compressor 10 is turned on and the air conditioner 1 is out of the heating mode, and therefore, the effectiveness and the purposiveness of enhanced vapor injection can be ensured. The situation that the air conditioner 1 has operation failure and increases energy consumption due to the mistaken communication of the economizer 20 and the compressor 10 is avoided.

Further, the processor is for executing the computer program to implement: the injection valve 30 is controlled to be opened based on the condition that any one of the at least one operation parameter and the outdoor environment temperature parameter is in the setting interval corresponding to the parameter, and the parameter is recorded as a specific parameter, that is, the actual operation parameter of the air conditioner 1 and the outdoor environment temperature parameter are used as the basis for opening the injection valve 30, and the injection valve 30 can be controlled to be opened as long as any one of the at least one operation parameter and the outdoor environment temperature parameter is in the setting interval corresponding to the parameter. The arrangement combines the self-running condition of the air conditioner 1 with the outdoor environment condition, enriches the conditions and basis for controlling the opening of the injection valve 30, and further makes the opening of the injection valve 30 have practical and feasible significance.

Further, the processor is for executing the computer program to implement: whether to close the injection valve 30 is determined based on at least one of the operating parameters and the remaining parameters except for the specific parameter among the outdoor ambient temperature parameters. This setting is combined with the setting of controlling the opening of the injection valve 30 to realize the opening and closing of the injection valve 30 on the basis of the combination of the self-operation parameter of the air conditioner 1 and the outdoor environment temperature parameter, so that the occurrence of the condition that the compressor 10 and the air conditioner 1 are in a failure due to the opening of the injection valve 30 under a specific condition (for example, the outdoor environment temperature is high, the operation frequency of the compressor 10 is low, the operation pressure of the air conditioner 1 is high, and the three-phase current of the compressor 10 is high) and the occurrence of the failure of the compressor 10 and the air conditioner 1 due to the fact that the injection valve 30 is not closed in time according to the current operation condition of the air conditioner 1 can be avoided.

The effectiveness of opening and closing of injection valve 30 has been guaranteed in the structure setting of air conditioner 1, has promoted the accuracy and the reliability of air conditioner 1 operation control, so, has the effect that improves air conditioner 1 low temperature heating capacity and efficiency, can ensure the long-term steady operation of unit under the low temperature operating mode.

Specifically, in a rare case where two or even more of at least one of the operating parameter and the outdoor-environment-temperature parameter of the air conditioner 1 are simultaneously in their respective setting sections, that is, the specific parameters are plural, it is determined whether to close the injection valve 30 based on the remaining parameters of the at least one of the operating parameter and the outdoor-environment-temperature parameter other than the plural specific parameters.

Specifically, the injection valve 30 is a solenoid valve, but the injection valve 30 may be other valve bodies capable of blocking or opening a pipeline connecting the compressor 10 and the economizer 20, which is not illustrated herein.

In one embodiment of the present invention, preferably, the at least one operating parameter comprises any one or a combination of: the operating frequency of the compressor 10, the operating pressure of the air conditioner 1, and the three-phase current of the compressor 10.

In this embodiment, when the at least one operating parameter is one, the operating parameter is any one of the following: the operating frequency of the compressor 10, the operating pressure of the air conditioner 1, and the three-phase current of the compressor 10. When at least one of the operation parameters is plural, the plural operation parameters are plural parameters among the operation frequency of the compressor 10, the operation pressure of the air conditioner 1, and the three-phase current of the compressor 10, for example, the number of the operation parameters is two, the two operation parameters are the operation frequency of the compressor 10 and the operation pressure of the air conditioner 1, respectively, and further, the number of the operation parameters is three, and the three operation parameters are the operation frequency of the compressor 10, the operation pressure of the air conditioner 1, and the three-phase current of the compressor 10, respectively, which is not exemplified herein.

In an embodiment of the present invention, preferably, the processor executes a process of controlling to open the injection valve 30 based on a condition that one of the at least one operating parameter and the outdoor environment temperature parameter is in a setting range corresponding to the one parameter, including: determining that the operating frequency is in a first set frequency interval based on at least one operating parameter including the operating frequency of the compressor 10, and controlling to open the injection valve 30; or on the basis that the at least one operation parameter comprises the operation pressure of the air conditioner 1, determining that the operation pressure is in a first set pressure interval, and controlling to open the injection valve 30; or determining that any phase current of the three-phase currents is in a first set current interval based on at least one operation parameter including the three-phase currents of the compressor 10, and controlling to open the injection valve 30; or determining that the outdoor environment temperature parameter is in the first set temperature interval, and controlling to open the injection valve 30.

In this embodiment, the injection valve 30 is controlled to be opened based on at least one of the operating parameters including the operating frequency of the compressor 10, the operating frequency being determined to be in a first set frequency interval. When the compressor 10 (e.g., inverter compressor) of the unit operates at a low frequency, the injected medium enters, and has a certain impact on the internal components of the compressor 10, which affects the normal operation of the compressor 10 operating at a low speed, and therefore, a fault of the compressor 10 or an out-of-step fault of an application program can be reported. Therefore, when the operating frequency of the compressor 10 is greater than or equal to the lower limit value of the first set frequency interval, the injection valve 30 is controlled to be opened, so that the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner 1 under the condition of ensuring the normal operation of the air conditioner 1 are achieved, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one of the operating parameters including the operating pressure of the air conditioner 1, it is determined that the operating pressure (e.g., high pressure) is in the first set pressure interval, and the injection valve 30 is controlled to be opened. Because the operating pressure of the air conditioner 1 is higher when the unit is under the working conditions of high outlet water temperature and near critical temperature, if the injection valve 30 is opened at this time, the operating pressure of the system is increased to the upper protection limit of the pressure switch of the air conditioner 1 due to the entering of the injection medium, and the fault protection is realized. Therefore, when the high-pressure of the air conditioner 1 is less than or equal to the upper limit value of the first set pressure interval, the injection valve 30 is controlled to be opened, so that the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner 1 under the condition of ensuring the normal operation of the air conditioner 1 are realized, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one of the operating parameters including three-phase currents of the compressor 10, it is determined that any one of the three-phase currents is in the first set current interval, and the injection valve 30 is controlled to be opened. Because the value of the three-phase current Ia/Ib/Ic of the running compressor 10 is high when the air conditioner 1 runs under certain working condition conditions, if the injection valve 30 is opened at the moment, the load of the running compressor 10 is increased due to the entering of the injection medium, so that the three-phase current Ia/Ib/Ic exceeds the current value monitored by the printed circuit board to realize fault protection, the injection valve 30 is controlled to be opened only when the three-phase current Ia/Ib/Ic of the compressor 10 is less than or equal to the upper limit value of the first set current interval, therefore, the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner 1 under the condition of ensuring the normal running of the air conditioner 1 are realized, and the long-term stable running of the unit under the low-temperature working condition is further.

Further, it is determined that the outdoor ambient temperature parameter is in the first set temperature range, and the injection valve 30 is controlled to be opened. Because the system pressure, the current and other numerical values of the operation of the air conditioner 1 are very high when the outdoor environment temperature is greater than or equal to a certain temperature value, if the injection medium enters at this time, the current is possibly protected too much, and the system pressure of the air conditioner 1 is protected too much, the injection valve 30 is controlled to be opened only when the outdoor environment temperature parameter is less than or equal to the upper limit value of the first set temperature interval, so that the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner 1 under the condition of ensuring the normal operation of the air conditioner 1 are realized, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Meanwhile, the self-operation parameters and the outdoor environment temperature parameters of the air conditioner 1 are used as the basis for judging whether the injection valve 30 is opened or not, so that the injection valve 30 can be opened in a targeted, timely and reasonable manner according to the actual operation condition and the outdoor environment temperature condition of the air conditioner 1, and the accuracy and the reliability of the operation control of the air conditioner 1 are improved.

Specifically, the operating frequency of the compressor 10 is included based on at least one operating parameter, wherein the number of the operating parameters may be one or more. When the number of the operation parameters is one, the operation parameter is an operation frequency of the compressor 10, and when the number of the operation parameters is plural, one of the plural operation parameters is an operation frequency of the compressor 10. Several other cases are similar to the above examples, but not exemplified here.

Specifically, the specific values of the first set frequency interval, the first set pressure interval, the first set current interval and the first set temperature interval are determined by means of experiments and simulation analysis.

In one embodiment of the present invention, preferably, the processor performs the process of determining whether to close the injection valve 30 according to at least one of the operation parameter and the outdoor ambient temperature parameter, except for a specific parameter, including: determining that the operation frequency is in a second set frequency interval based on at least one operation parameter including the operation frequency of the compressor 10, and closing the injection valve 30, wherein the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval; or based on at least one operation parameter including the operation pressure of the air conditioner 1, determining that the operation pressure is in a second set pressure interval, and closing the injection valve 30, wherein the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval; or determining that one phase of the three-phase currents is in a second set current interval based on at least one operation parameter including the three-phase currents of the compressor 10, and closing the injection valve 30, wherein the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval; or determining that the outdoor environment temperature parameter is in a second set temperature interval, and closing the injection valve 30, wherein the upper limit value of the first set temperature interval is smaller than the lower limit value of the second set temperature interval.

In this embodiment, based on at least one operating parameter including the operating frequency of compressor 10, it is determined that the operating frequency is in the second set frequency interval, and injection valve 30 is closed. That is, the injection valve 30 is opened only when the operating frequency of the compressor 10 is equal to or higher than the lower limit value of the first set frequency interval, and the injection valve 30 is closed when the operating frequency of the compressor 10 is equal to or lower than the upper limit value of the second set frequency interval, and the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval. This arrangement prevents the injection valve 30 from being opened when the compressor 10 is operated at a low frequency, thereby preventing the compressor 10 from being normally operated. Meanwhile, the basis for closing the injection valve 30 is reasonably set, so that the injection valve 30 can be timely and effectively closed according to the actual operation condition of the air conditioner 1, the condition of refrigerant backflow at the compressor 10 can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one operating parameter including the operating pressure of the air conditioner 1, it is determined that the operating pressure (e.g., high pressure) is in the second set pressure interval, and the injection valve 30 is closed. That is, the injection valve 30 is opened only when the high pressure of the air conditioner 1 is equal to or lower than the upper limit value of the first set pressure section, and the injection valve 30 is closed when the high pressure of the air conditioner 1 is equal to or higher than the lower limit value of the second set pressure section, so that the upper limit value of the first set pressure section is smaller than the lower limit value of the second set pressure section. This arrangement prevents the air conditioner 1 from opening the injection valve 30 when operating under the conditions of high outlet water temperature and near critical temperature, and thus prevents the air conditioner 1 from operating normally. Meanwhile, the basis for closing the injection valve 30 is reasonably set, so that the injection valve 30 can be timely and effectively closed according to the actual operation condition of the air conditioner 1, the condition of refrigerant backflow at the compressor 10 can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, it is determined that one of the three-phase currents is in the second set current interval based on at least one operating parameter including the three-phase currents of the compressor 10, and the injection valve 30 is closed. That is, the injection valve 30 is opened only when one phase current of the three-phase currents of the compressor 10 is equal to or less than the upper limit value of the first set current section, and the injection valve 30 is closed when one phase current of the three-phase currents of the compressor 10 is equal to or more than the lower limit value of the second set current section, and the upper limit value of the first set current section is smaller than the lower limit value of the second set current section. This arrangement prevents the occurrence of a situation in which the air conditioner 1 cannot normally operate because the injection valve 30 is opened when the three-phase current value of the compressor 10 is excessively high. Meanwhile, the basis for closing the injection valve 30 is reasonably set, so that the injection valve 30 can be timely and effectively closed according to the actual operation condition of the air conditioner 1, the condition of refrigerant backflow at the compressor 10 can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, it is determined that the outdoor ambient temperature parameter is in the second set temperature interval, the injection valve 30 is closed. That is, the injection valve 30 is opened only when the outdoor environment temperature parameter is less than or equal to the upper limit value of the first set temperature interval, and the injection valve 30 is closed when the outdoor environment temperature parameter is greater than or equal to the lower limit value of the second set temperature interval, so that the upper limit value of the first set temperature interval is less than the lower limit value of the second set temperature interval. This setting has avoided opening injection valve 30 when numerical values such as the system pressure of air conditioner 1 operation, electric current are higher, and then the condition that leads to air conditioner 1 unable normal operating takes place. Meanwhile, the basis for closing the injection valve 30 is reasonably set, so that the injection valve 30 can be timely and effectively closed according to the actual operation condition of the air conditioner 1, the condition of refrigerant backflow at the compressor 10 can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Meanwhile, the self-operation parameters and the outdoor environment temperature parameters of the air conditioner 1 are used as the basis for judging whether the injection valve 30 is closed or not, so that the injection valve 30 can be closed in a targeted, timely and reasonable manner according to the actual operation condition and the outdoor environment temperature condition of the air conditioner 1, and the accuracy and the reliability of the operation control of the air conditioner 1 are improved.

Specifically, the specific values of the second set frequency interval, the second set pressure interval, the second set current interval and the second set temperature interval are determined by means of experiments and simulation analysis.

In a specific embodiment, the number of the at least one operation parameter is three, and the number of the at least one operation parameter is the operation frequency of the compressor 10, the operation pressure of the air conditioner 1, and the three-phase current of the compressor 10. Wherein it is determined that the outdoor ambient temperature parameter is less than or equal to the upper limit value of the first set temperature interval, the injection valve 30 is opened. When it is determined that the operating frequency of the compressor 10 is equal to or lower than the upper limit value of the second set frequency section (in this case, the operating pressure of the air conditioner 1 is lower than the lower limit value of the second set pressure section, and one phase current of the three-phase currents of the compressor 10 is lower than the lower limit value of the second set current section) during the operation of the air conditioner 1, the injection valve 30 is closed.

In a specific embodiment, the number of the at least one operation parameter is three, and the number of the at least one operation parameter is the operation frequency of the compressor 10, the operation pressure of the air conditioner 1, and the three-phase current of the compressor 10. Here, it is determined that the operating frequency of the compressor 10 is equal to or greater than the lower limit value of the first set frequency interval, and thus the injection valve 30 is opened. During the operation of the air conditioner 1, the operation pressure of the air conditioner 1 is equal to or higher than the lower limit value of the second set pressure section, and one phase current of the three-phase currents of the compressor 10 is equal to or lower than the upper limit value of the first set current section (in this case, the outdoor environment temperature parameter is smaller than the lower limit value of the second set temperature section), so the injection valve 30 is closed. In addition, it is rare that the operation pressure of the air conditioner 1 is equal to or higher than the lower limit value of the second set pressure section, and one-phase current of the three-phase currents of the compressor 10 is equal to or lower than the upper limit value of the first set current section. Of course, theoretically, the operating pressure of the air conditioner 1 is greater than or equal to the lower limit value of the second set pressure interval, the phase current of the three-phase current of the compressor 10 is less than or equal to the upper limit value of the first set current interval, and the outdoor environment temperature parameter is greater than or equal to the lower limit value of the second set temperature interval. This is not an example.

Specifically, the operating frequency of the compressor 10 is included based on at least one operating parameter, wherein the number of the operating parameters may be one or more. When the number of parameters other than the specific parameter among the at least one operation parameter and the outdoor ambient temperature parameter is one, the operation parameter is the operation frequency of the compressor 10. When the number of the at least one operation parameter and the parameters other than the specific parameter among the outdoor ambient temperature parameters is plural, one of the plural operation parameters is the operation frequency of the compressor 10. Several other cases are similar to the above examples, but not exemplified here.

In an embodiment of the present invention, before the processor performs the acquiring of the at least one operating parameter of the air conditioner 1 and the outdoor environment temperature parameter, the processor further includes: it is determined that the operating frequency of the compressor 10 is within the preset operating frequency interval and the operation is continued for a set time period.

In this embodiment, it is determined that the operating frequency of the compressor 10 is within the preset operating frequency range, and the operation is continued for a set duration, that is, it is ensured that the operating frequency of the compressor 10 is in a stable state (for example, the operating frequency is not in an ascending stage or a descending stage), and then at least one operating parameter of the air conditioner 1 and the outdoor environment temperature parameter are obtained, so that the effectiveness, stability and reliability of subsequently obtained parameters can be ensured, and reliable and effective data guarantee is provided for the normal operation of the air conditioner 1.

In one embodiment of the present invention, preferably, as shown in fig. 1, the air conditioner 1 further includes: an indoor heat exchanger; an outdoor heat exchanger 40; the economizer 20 is communicated with the indoor heat exchanger, the compressor 10 and the outdoor heat exchanger 40; a first flow control valve 50 provided on a pipe connecting the economizer 20 and the outdoor heat exchanger 40; and a second flow control valve 60 provided on a pipe connecting the economizer 20 and the indoor heat exchanger.

In this embodiment, the air conditioner 1 further includes: indoor heat exchanger, outdoor heat exchanger 40, first flow control valve 50 and second flow control valve 60. When the air conditioner 1 is in a heating mode, the high-pressure refrigerant from the compressor 10 enters the indoor heat exchanger, so that heat supply to a room is realized. Two refrigerant branches are divided from a main flow path from the indoor heat exchanger and enter the economizer 20 in a throttled state (the second flow control valve 60 enters the economizer 20) and an unthrottled state (the refrigerant directly enters the economizer 20), and the unthrottled refrigerant is converged with the refrigerant of the main flow path through the first flow control valve 50 and enters the outdoor heat exchanger 40 after releasing heat in the economizer 20. The throttled bypass refrigerant is further cooled in the economizer 20 by thermal expansion to lower the temperature of the unthrottled refrigerant and is injected into the compressor 10 as a gaseous refrigerant. This structure setting has improved the effect of air entrainment enthalpy, can improve the super-cooled rate of system simultaneously, strengthens the heat transfer ability of unit, improves air conditioner 1 because the not enough problem of heat transfer ability that the low temperature leads to improve whole air conditioning system's heat transfer effect.

In a specific embodiment, as shown in fig. 1, an air conditioner 1 includes: a compressor 10, an economizer 20 (e.g., a plate economizer), an injection valve 30, an outdoor heat exchanger 40, a first flow control valve 50, a second flow control valve 60, a four-way valve 70, a pressure sensor 80, a low pressure tank 90, a reservoir tank 100, a filter 110, a pressure switch, and a high pressure switch 130. The economizer 20 is communicated with the indoor heat exchanger, the compressor 10 and the outdoor heat exchanger 40; a first flow control valve 50 provided on a pipe connecting the economizer 20 and the outdoor heat exchanger 40; a second flow control valve 60 provided on a pipe connecting the economizer 20 and the indoor heat exchanger; four ports of the four-way valve 70 are respectively communicated with the compressor 10, the indoor heat exchanger, the outdoor heat exchanger 40 and the low-pressure tank 90; the pressure sensor 80 is disposed on a pipe connecting the four-way valve 70 and the indoor heat exchanger; the low pressure tank 90 is in communication with the compressor 10; the liquid storage tank 100 is communicated with the indoor heat exchanger; the filter 110 is disposed on a pipe connecting the indoor heat exchanger and the economizer 20, and on a pipe connecting the economizer 20 and the outdoor heat exchanger 40; the low pressure switch 120 is disposed on a pipe connecting the low pressure tank 90 and the compressor 10; the high-pressure switch 130 is provided on a line connecting the compressor 10 and the four-way valve 70. Among them, the pressure sensor 80 is used for detecting the operating pressure of the air conditioner 1; the first flow control valve 50 and the second flow control valve 60 function as a throttle; the four-way valve 70 is used to adjust the flow direction of the refrigerant.

In addition, the direction of the arrow indicates the flowing direction of the refrigerant, and when the air conditioner 1 is in the heating mode, the high-pressure refrigerant coming out of the compressor 10 enters the indoor heat exchanger, so that heat supply to the room is realized. Two refrigerant branches are divided from a main flow path from the indoor heat exchanger and enter the economizer 20 in a throttled state (the second flow control valve 60 enters the economizer 20) and an unthrottled state (the refrigerant directly enters the economizer 20), and the unthrottled refrigerant is converged with the refrigerant of the main flow path through the first flow control valve 50 and enters the outdoor heat exchanger 40 after releasing heat in the economizer 20. The throttled bypass refrigerant is further cooled in the economizer 20 by thermal expansion to lower the temperature of the unthrottled refrigerant and is injected into the compressor 10 as a gaseous refrigerant. This structure setting has improved the effect of air entrainment enthalpy, can improve the super-cooled rate of system simultaneously, strengthens the heat transfer ability of unit, improves air conditioner 1 because the not enough problem of heat transfer ability that the low temperature leads to improve whole air conditioning system's heat transfer effect.

As shown in fig. 2, fig. 2 is a schematic diagram of enhanced vapor injection, where main refrigerant paths are shown from 3 to 5, refrigerant paths flowing through the second flow control valve are shown from 4 to 4 ', refrigerant paths flowing through the first flow control valve are shown from 5 to 5 ', refrigerant paths of the paths are shown from 4 ' to 2 ' enter the compressor for compression, main refrigerant paths are shown from 5 ' to 1 enter the compressor for compression, and 2 ' and 1 converge from 2 to 3 ' to complete a cycle process.

Fig. 3 is a schematic flowchart illustrating an air conditioner operation control method according to a first embodiment of the present invention.

As shown in fig. 3, an air conditioner operation control method according to a first embodiment of a second aspect of the present invention includes:

s302, acquiring at least one operating parameter and outdoor environment temperature parameter of the air conditioner based on the starting of the compressor and the fact that the air conditioner is in a heating mode;

s304, controlling to open the injection valve based on the condition that any one of at least one operation parameter and the outdoor environment temperature parameter is in a set interval corresponding to the parameter, and recording the parameter as a specific parameter;

and S306, determining whether to close the injection valve according to the at least one operation parameter and the rest parameters except the specific parameter in the outdoor environment temperature parameter.

In one embodiment of the present invention, preferably, the at least one operating parameter comprises any one or a combination of: the running frequency of the compressor, the running pressure of the air conditioner and the three-phase current of the compressor.

In this embodiment, when the at least one operating parameter is one, the operating parameter is any one of the following: the running frequency of the compressor, the running pressure of the air conditioner and the three-phase current of the compressor. When at least one operation parameter is multiple, the multiple operation parameters are multiple parameters among the operation frequency of the compressor, the operation pressure of the air conditioner, and the three-phase current of the compressor, for example, the number of the operation parameters is two, two operation parameters are the operation frequency of the compressor and the operation pressure of the air conditioner, respectively, and for example, the number of the operation parameters is three, and three operation parameters are the operation frequency of the compressor, the operation pressure of the air conditioner, and the three-phase current of the compressor, which are not exemplified herein.

In an embodiment of the present invention, preferably, the process of controlling to open the injection valve based on a condition that any one of the at least one operating parameter and the outdoor environment temperature parameter is in a setting range corresponding to the parameter includes: determining that the running frequency is in a first set frequency interval based on at least one running parameter comprising the running frequency of the compressor, and controlling to open the injection valve; or determining that the operating pressure is in a first set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and controlling to open the injection valve; or determining that one phase of current in the three-phase current is in a first set current interval based on at least one operation parameter including the three-phase current of the compressor, and controlling to open the injection valve; or determining that the outdoor environment temperature parameter is in a first set temperature interval, and controlling to open the injection valve.

In this embodiment, the opening of the injection valve is controlled based on at least one operating parameter including an operating frequency of the compressor, the operating frequency being determined to be in a first set frequency interval. When a compressor (such as a variable frequency compressor) of a unit operates at a low frequency, an injection medium enters, certain impact is caused on internal components of the compressor, and normal operation of the compressor operating at a low speed is influenced, so that a compressor fault or an application program step-out fault can be reported. Therefore, when the operating frequency of the compressor is required to be greater than or equal to the lower limit value of the first set frequency interval, the injection valve is controlled to be opened, so that the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner under the condition of ensuring the normal operation of the air conditioner are realized, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one operating parameter including an operating pressure of the air conditioner, it is determined that the operating pressure (e.g., a high pressure) is in a first set pressure interval, and the injection valve is controlled to be opened. Because the operating pressure of the air conditioner is higher when the unit is under the working conditions of high water outlet temperature and near critical temperature, if the injection valve is opened at the moment, the operating pressure of the system is increased to the upper protection limit of the pressure switch of the air conditioner due to the entering of the injection medium, and the fault protection is realized. Therefore, when the high-pressure of the air conditioner is smaller than or equal to the upper limit value of the first set pressure interval, the injection valve is controlled to be opened, so that the effects of improving the low-temperature heating capacity and the energy efficiency of the air conditioner under the condition of ensuring the normal operation of the air conditioner are realized, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Specifically, the operation frequency of the compressor is included based on at least one operation parameter, wherein the number of the operation parameters may be one or more. When the number of the operation parameters is one, the operation parameter is an operation frequency of the compressor, and when the number of the operation parameters is plural, one of the plurality of operation parameters is the operation frequency of the compressor. Several other cases are similar to the above examples, but not exemplified here.

In one embodiment of the present invention, preferably, the step of determining whether to close the injection valve according to at least one of the operating parameter and the outdoor environment temperature parameter, except for the specific parameter, includes: determining that the operation frequency is in a second set frequency interval based on at least one operation parameter comprising the operation frequency of the compressor, and closing the injection valve, wherein the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval; or determining that the operating pressure is in a second set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and closing the injection valve, wherein the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval; or determining that one phase of current in the three-phase current is in a second set current interval based on at least one operation parameter including the three-phase current of the compressor, and closing the injection valve, wherein the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval; or determining that the outdoor environment temperature parameter is in a second set temperature interval, and closing the injection valve, wherein the upper limit value of the first set temperature interval is smaller than the lower limit value of the second set temperature interval.

In this embodiment, the injection valve is closed based on at least one operating parameter including an operating frequency of the compressor, the operating frequency being determined to be in a second set frequency interval. That is, the injection valve is opened only when the operating frequency of the compressor is equal to or higher than the lower limit value of the first set frequency interval, and the injection valve is closed when the operating frequency of the compressor is equal to or lower than the upper limit value of the second set frequency interval, and the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval. The step arrangement avoids the situation that the compressor cannot normally run due to the fact that the injection valve is opened when the compressor runs at low frequency. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

Further, based on at least one operating parameter including an operating pressure of the air conditioner, it is determined that the operating pressure (e.g., high pressure) is in a second set pressure interval, and the injection valve is closed. That is, the injection valve is opened only when the high pressure of the air conditioner is equal to or lower than the upper limit value of the first set pressure interval, and the injection valve is closed when the high pressure of the air conditioner is equal to or higher than the lower limit value of the second set pressure interval, so that the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval. The step arrangement avoids the situation that the air conditioner cannot normally operate due to the fact that the injection valve is opened when the air conditioner operates under the working conditions of high water outlet temperature and near critical temperature. Meanwhile, the basis for closing the injection valve is reasonably set, so that the injection valve can be timely and effectively closed according to the actual running condition of the air conditioner, the condition of refrigerant backflow at the compressor can be prevented, and the long-term stable operation of the unit under the low-temperature working condition is further ensured.

In a specific embodiment, the number of the at least one operation parameter is three, and the number of the at least one operation parameter is the operation frequency of the compressor, the operation pressure of the air conditioner and the three-phase current of the compressor. And determining that the outdoor environment temperature parameter is less than or equal to the upper limit value of the first set temperature interval, and opening the injection valve. When the operation frequency of the compressor is determined to be less than or equal to the upper limit value of the second set frequency interval (at the moment, the operation pressure of the air conditioner is less than the lower limit value of the second set pressure interval, and one-phase current in three-phase current of the compressor is less than the lower limit value of the second set current interval) in the operation of the air conditioner, so that the injection valve is closed.

In a specific embodiment, the number of the at least one operation parameter is three, and the number of the at least one operation parameter is the operation frequency of the compressor, the operation pressure of the air conditioner and the three-phase current of the compressor. And determining that the running frequency of the compressor is greater than or equal to the lower limit value of the first set frequency interval, and opening the injection valve. During the operation of the air conditioner, the operation pressure of the air conditioner is greater than or equal to the lower limit value of the second set pressure interval, and one phase current of the three-phase currents of the compressor is less than or equal to the upper limit value of the first set current interval (at this moment, the outdoor environment temperature parameter is less than the lower limit value of the second set temperature interval), so the injection valve is closed. In addition, the condition that the operation pressure of the air conditioner is larger than or equal to the lower limit value of the second set pressure interval and the phase current of one phase of the three-phase current of the compressor is smaller than or equal to the upper limit value of the first set current interval is rarely occurred at the same time. Of course, in theory, the operating pressure of the air conditioner is greater than or equal to the lower limit value of the second set pressure interval, one phase current of the three-phase currents of the compressor is less than or equal to the upper limit value of the first set current interval, and the outdoor environment temperature parameter is greater than or equal to the lower limit value of the second set temperature interval. This is not an example.

Specifically, the operation frequency of the compressor is included based on at least one operation parameter, wherein the number of the operation parameters may be one or more. When the number of the at least one operation parameter and the parameters other than the specific parameter among the outdoor ambient temperature parameters is one, the operation parameter is an operation frequency of the compressor. When the number of the at least one operation parameter and the parameters except for the specific parameter among the outdoor ambient temperature parameters is plural, one of the plural operation parameters is an operation frequency of the compressor. Several other cases are similar to the above examples, but not exemplified here.

Fig. 4 is a schematic flowchart illustrating an air conditioner operation control method according to a second embodiment of the present invention.

As shown in fig. 4, an air conditioner operation control method according to a second embodiment of a second aspect of the present invention includes:

s402, determining that the running frequency of the compressor is in a preset running frequency interval and the running is continued for a set time length based on the fact that the compressor is started and the air conditioner is in a heating mode, and acquiring at least one running parameter of the air conditioner and an outdoor environment temperature parameter;

s404, determining that the running frequency is in a first set frequency interval based on at least one running parameter including the running frequency of the compressor, and controlling to open the injection valve; or determining that the operating pressure is in a first set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and controlling to open the injection valve; or determining that one phase of current in the three-phase current is in a first set current interval based on at least one operation parameter including the three-phase current of the compressor, and controlling to open the injection valve; or determining that the outdoor environment temperature parameter is in a first set temperature interval, and controlling to open the injection valve; recording the parameters as specific parameters;

s406, determining that the operation frequency is in a second set frequency interval based on at least one operation parameter including the operation frequency of the compressor, and closing the injection valve, wherein the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval; or determining that the operating pressure is in a second set pressure interval based on at least one operating parameter including the operating pressure of the air conditioner, and closing the injection valve, wherein the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval; or determining that one phase of current in the three-phase current is in a second set current interval based on at least one operation parameter including the three-phase current of the compressor, and closing the injection valve, wherein the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval; or determining that the outdoor environment temperature parameter is in a second set temperature interval, and closing the injection valve, wherein the upper limit value of the first set temperature interval is smaller than the lower limit value of the second set temperature interval.

In this embodiment, it is determined that the operating frequency of the compressor is within the preset operating frequency range, and the compressor is continuously operated for a set duration, that is, the operating frequency of the compressor is ensured to be in a stable state (for example, the operating frequency is not in an ascending stage or a descending stage), and then at least one operating parameter of the air conditioner and the outdoor environment temperature parameter are obtained, so that the effectiveness, stability and reliability of subsequently obtained parameters can be ensured, and reliable and effective data guarantee is provided for the normal operation of the air conditioner.

In a specific embodiment, a process of performing control by applying the air conditioner operation control method provided by the present invention is shown in fig. 5:

s502, the air conditioner is in a heating mode;

s504, the compressor is started, and the steps are shifted to S506, S518, S530 and S542;

s506, acquiring the running frequency of the compressor, and turning to the steps S508 and S514;

s508, monitoring that the running frequency of the compressor is larger than or equal to the lower limit value of a first set frequency interval;

s510, opening an injection valve;

s512, continuously monitoring the outdoor environment temperature, the operation pressure of the air conditioner and the three-phase current of the compressor in the operation process, and further judging whether to close the injection valve;

s514, monitoring the operation frequency of the compressor to be less than or equal to the upper limit value of a second set frequency interval;

s516, closing the injection valve;

s518, acquiring the outdoor environment temperature, and turning to the steps S520 and S526;

s520, monitoring the outdoor environment temperature to be less than or equal to the upper limit value of a first set temperature interval;

s522, opening an injection valve;

s524, continuously monitoring the running frequency of the compressor, the running pressure of the air conditioner and the three-phase current of the compressor in the running process, and further judging whether to close the injection valve;

s526, monitoring that the outdoor environment temperature is larger than or equal to the lower limit value of a second set temperature interval;

s528, closing the injection valve;

s530, acquiring the operating pressure of the air conditioner, and turning to steps S532 and S538;

s532, monitoring the operating pressure of the air conditioner to be less than or equal to the upper limit value of a first set pressure interval;

s534, opening the injection valve;

s536, continuously monitoring the running frequency of the compressor, the outdoor environment temperature and the three-phase current of the compressor in the running process, and further judging whether to close the injection valve;

s538, monitoring that the outdoor environment temperature parameter is larger than or equal to a lower limit value of a second set temperature interval;

s540, closing the injection valve;

s542, acquiring three-phase current of the compressor, and turning to steps S544 and S550;

s544, monitoring that one phase current in three-phase currents of the compressor is less than or equal to the upper limit value of a first set current interval;

s546, opening an injection valve;

s548, continuously monitoring the running frequency of the compressor, the outdoor environment temperature and the running pressure of the air conditioner in the running process, and further judging whether to close the injection valve;

s550, monitoring that one phase current in the three-phase currents of the compressor is larger than or equal to the lower limit value of a second set current interval;

s552, close the injection valve.

A third aspect according to an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the air conditioner operation control method according to any one of the second aspects, and therefore, has all the advantageous effects of the air conditioner operation control method according to any one of the above-described embodiments.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 invention. 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.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air conditioner, comprising:

a compressor;

the economizer is connected with the compressor through a pipeline;

an injection valve provided on the pipe;

a memory for storing a computer program;

a processor for executing the computer program to implement:

acquiring at least one operating parameter and an outdoor environment temperature parameter of the air conditioner based on the starting of the compressor and the fact that the air conditioner is in a heating mode;

controlling to open the injection valve based on the condition that any one of the at least one operation parameter and the outdoor environment temperature parameter is in a set interval corresponding to the parameter, and recording the parameter as a specific parameter;

determining whether to close the injection valve according to the at least one operating parameter and the rest of the outdoor environment temperature parameters except the specific parameter;

the at least one operating parameter comprises any one or a combination of: the air conditioner comprises an air conditioner, a compressor, an air conditioner and a control system, wherein the air conditioner comprises a compressor, an air conditioner and a compressor, and the operation frequency of the compressor, the operation pressure of the air conditioner and the three-phase current of the compressor are controlled by the control system.

2. The air conditioner according to claim 1,

the processor executes the condition that any one of the at least one operation parameter and the outdoor environment temperature parameter is in the set interval corresponding to the parameter, and the process of controlling and opening the injection valve comprises the following steps:

determining that the operating frequency is in a first set frequency interval based on the at least one operating parameter comprising the operating frequency of the compressor, and controlling to open the injection valve; or

Determining that the operating pressure is in a first set pressure interval based on the at least one operating parameter comprising the operating pressure of the air conditioner, and controlling to open the injection valve; or

Determining that one phase of the three-phase current is in a first set current interval based on the at least one operating parameter comprising the three-phase current of the compressor, and controlling to open the injection valve; or

And determining that the outdoor environment temperature parameter is in a first set temperature interval, and controlling to open the injection valve.

3. The air conditioner according to claim 2,

the processor performing the process of determining whether to close the injection valve according to the at least one operating parameter and the remaining parameters except the specific parameter among the outdoor environment temperature parameters includes:

determining that the operating frequency is in a second set frequency interval based on the at least one operating parameter comprising the operating frequency of the compressor, and closing the injection valve, wherein the lower limit value of the first set frequency interval is greater than the upper limit value of the second set frequency interval; or

Determining that the operating pressure is in a second set pressure interval based on the at least one operating parameter comprising the operating pressure of the air conditioner, and closing the injection valve, wherein the upper limit value of the first set pressure interval is smaller than the lower limit value of the second set pressure interval; or

Determining that one phase of the three-phase currents is in a second set current interval based on the at least one operating parameter comprising the three-phase currents of the compressor, and closing the injection valve, wherein the upper limit value of the first set current interval is smaller than the lower limit value of the second set current interval; or

And determining that the outdoor environment temperature parameter is in a second set temperature interval, and closing the injection valve, wherein the upper limit value of the first set temperature interval is smaller than the lower limit value of the second set temperature interval.

4. The air conditioner according to any one of claims 1 to 3,

before the processor executes the step of obtaining at least one operating parameter and outdoor environment temperature parameter of the air conditioner, the method further comprises the following steps:

and determining that the operating frequency of the compressor is in a preset operating frequency interval, and continuously operating for a set time.

5. The air conditioner according to any one of claims 1 to 3, further comprising:

an indoor heat exchanger;

an outdoor heat exchanger;

the economizer is communicated with the indoor heat exchanger, the compressor and the outdoor heat exchanger;

the first flow control valve is arranged on a pipeline connecting the economizer and the outdoor heat exchanger;

and the second flow control valve is arranged on a pipeline connecting the economizer and the indoor heat exchanger.

6. An operation control method of an air conditioner is characterized in that the air conditioner comprises a compressor, an economizer and an injection valve, the injection valve is arranged on a pipeline connecting the compressor and the economizer, and the operation control method of the air conditioner comprises the following steps:

7. The air conditioner operation control method according to claim 6,

the process of controlling the opening of the injection valve based on the condition that any one of the at least one operating parameter and the outdoor environment temperature parameter is in the set interval corresponding to the parameter comprises the following steps:

8. The air conditioner operation control method according to claim 7,

the step of determining whether to close the injection valve according to the at least one operating parameter and the remaining parameters of the outdoor environment temperature parameter other than the specific parameter may specifically include:

9. The air conditioner operation control method according to any one of claims 6 to 8,

before the step of obtaining at least one operating parameter of the air conditioner and the outdoor environment temperature parameter, the method further comprises the following steps:

10. A computer-readable storage medium on which a computer program is stored, the computer program realizing the air conditioner operation control method according to any one of claims 6 to 9 when executed by a processor.