CN111397168A - Control method and device of air conditioning system, control equipment, medium and air conditioning system - Google Patents

Abstract

The invention relates to a control method, a control device, a medium and an air conditioning system of the air conditioning system, and the current working parameters of the air conditioning system are obtained; determining a relative relationship between the current working parameter and a reference working parameter; and controlling the compressor to work under the condition that the reference exhaust temperature is adjusted to the target exhaust temperature according to the relative relation, and/or controlling the compressor to work under the condition that the reference frequency upper limit is adjusted to the target frequency upper limit. Therefore, the upper limit of the exhaust temperature and/or the frequency of the compressor of the air-conditioning system meets the requirement under the length of the current connecting pipe, the accumulation of the refrigerant in the flash evaporator is reduced, the phenomenon that the compressor has broken the air supply and absorbs the air and carries the liquid is reduced, and the running reliability of the air-conditioning system is high.

Description

Control method, device, control device, medium and air-conditioning system for air-conditioning system

technical field

The present invention relates to the technical field of air conditioning, and in particular, to a control method, device, control device, medium and air conditioning system of an air conditioning system.

Background technique

In the two-stage compression system, the general enthalpy injection method is a flash evaporator. After the liquid refrigerant flows out of the condenser, it is throttled by the electronic expansion valve to generate a part of the gas, and is injected into the compressor from the enthalpy increasing pipe by means of the flash evaporator. Increase the enthalpy of compressor air supply. If the liquid level in the flash evaporator is too high, it is easy to cause the suction of the compressor to be filled with liquid, which will affect the compressor itself and the entire air conditioning system.

In some occasions, due to location constraints, it is necessary to consider shortening or lengthening the connecting pipe (the pipe connected between the condenser and the evaporator) during the installation of the air-conditioning system to meet the needs. When the connecting pipe is shortened or lengthened, it is necessary to change the The amount of refrigerant injected to achieve the same cooling effect as when using standard connecting pipes. When the length of the connecting pipe is shortened or lengthened, if the target exhaust gas or frequency upper limit setting of the compressor is unreasonable, more refrigerant may be accumulated in the flash evaporator, resulting in the suction of liquid in the process of compressor air supply and enthalpy increase. , which in turn makes the operation reliability of the air conditioning system not high.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an air-conditioning system control method, device, control device, medium and air-conditioning system that can improve the operational reliability of the air-conditioning system in view of the low operational reliability of the air-conditioning system in the conventional technology.

A control method of an air conditioning system, the method comprising:

Obtain the current working parameters of the air conditioning system;

determining the relative relationship between the current working parameter and the reference working parameter;

According to the relative relationship, the compressor is controlled to operate from the reference exhaust gas temperature to the target exhaust gas temperature, and/or the compressor is controlled to operate from the upper limit of the reference frequency to the upper limit of the target frequency.

In one embodiment, the step controls the compressor to operate from the reference discharge temperature to the target discharge temperature according to the relative relationship, and/or controls the compressor to operate from the reference frequency upper limit to the target frequency upper limit include:

According to the relative relationship, the compressor is controlled to operate at the target exhaust gas temperature from the reference exhaust gas temperature, and the compressor is controlled from the reference frequency upper limit to operate under the target frequency upper limit.

In one embodiment, the current working parameters include a first current working parameter and a second current working parameter;

The step of determining the relative relationship between the current working parameter and the reference working parameter includes:

determining a first relative relationship between the first current operating parameter and a first reference operating parameter and a second relative relationship between the second current operating parameter and a second reference operating parameter;

The step of controlling the compressor to operate from the reference exhaust temperature to the target exhaust temperature according to the relative relationship, and/or controlling the compressor to operate from the upper limit of the reference frequency to the upper limit of the target frequency, includes:

According to the first relative relationship and the second relative relationship, the compressor is controlled from the reference exhaust gas temperature to operate at the target exhaust gas temperature, and/or the compressor is controlled from the reference frequency The upper limit is adjusted to work under the upper limit of the target frequency.

In one embodiment, the first current working parameter is the current temperature difference of the current connecting pipe, and the second current working parameter is the current working current of the compressor;

The current temperature difference is the absolute value of the difference between the refrigerant inlet temperature of the current connection pipe and the refrigerant outlet temperature of the current connection pipe.

In one embodiment, the step controls the compressor to be adjusted from the reference exhaust gas temperature to the target exhaust gas temperature according to the first relative relationship and the second relative relationship, and/or controls Adjusting the compressor from the upper limit of the reference frequency to the upper limit of the target frequency includes:

When the difference value of the current temperature difference minus the reference temperature difference is smaller than the first temperature value, and the difference value of the current current minus the reference current is smaller than the first current value, the target exhaust gas temperature is adjusted to be smaller than the reference exhaust gas temperature air temperature, adjust the upper limit of the target frequency to be greater than the upper limit of the reference frequency;

When the difference value of the current temperature difference minus the reference temperature difference is greater than or equal to the first temperature value and less than the second temperature value, and the difference value of the current current minus the reference current is greater than or equal to the first current value and less than the second current value When , adjust the target exhaust gas temperature to be equal to the reference exhaust gas temperature, and adjust the target frequency upper limit to be equal to the reference frequency upper limit;

When the difference value of the current temperature difference minus the reference temperature difference is greater than or equal to the second temperature value, and the difference value of the current current minus the reference current is greater than or equal to the second current value, adjusting the target exhaust gas temperature to be greater than the The reference exhaust gas temperature is adjusted to be less than the upper limit of the reference frequency by adjusting the upper limit of the target frequency.

In one embodiment, the first current working parameter is the current suction superheat of the compressor, and the second current working parameter is the current working current of the compressor or the current working temperature of the condenser or the compression The current operating power of the machine.

A control device for an air conditioning system, comprising:

The acquisition module is used to acquire the current working parameters of the air-conditioning system;

a determining module, for determining the relative relationship between the current working parameter and the reference working parameter;

The control module is configured to control the compressor to operate from the reference exhaust temperature to the target exhaust temperature according to the relative relationship, and/or to control the compressor to operate from the upper limit of the reference frequency to the upper limit of the target frequency.

In one embodiment, the determining module includes a first determining module and a second determining module,

Wherein, the first determination module is used for determining the first relative relationship between the first current working parameter and the first reference working parameter, and the second determining module is used for determining the second current working parameter and the second reference working parameter The second relative relationship between.

A computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the steps of any of the methods described above are implemented.

A control device includes a memory and a processor, wherein the memory stores a computer program, characterized in that the processor implements the steps of any one of the methods described above when the processor executes the computer program.

An air-conditioning system includes the above-mentioned control device, the air-conditioning system is provided with a compressor, and the control device is connected to the compressor of the air-conditioning system.

The above-mentioned control method, device, control device, medium and air-conditioning system for the air-conditioning system, control the compressor to operate at the target discharge temperature from the reference discharge temperature according to the relative relationship between the current working parameter and the reference working parameter, and/or control the compression The compressor is adjusted from the upper limit of the reference frequency to the upper limit of the target frequency, so that the exhaust temperature and/or the upper frequency limit of the compressor of the air-conditioning system can meet the demand under the current length of the connecting pipe, reduce the accumulation of refrigerant in the flasher, and reduce the number of compressors. In the process of replenishing Zenghan, the air is inhaled with liquid, which makes the operation reliability of the air conditioning system high.

Description of drawings

1 is a schematic flowchart of a control method of an air-conditioning system in one embodiment;

2 is a schematic flowchart of a control method of an air-conditioning system in another embodiment;

3 is a structural block diagram of a control device of an air-conditioning system in one embodiment;

Fig. 4 is the internal structure diagram of the control device in one embodiment;

5 is a schematic diagram of an air conditioning system in one embodiment;

FIG. 6 is a schematic structural diagram of the compressor shown in FIG. 5 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

In one embodiment, as shown in FIG. 1 , a method for controlling an air-conditioning system is provided, and the method is applied to a control device as an example for description, wherein the control device is a device used to control the operation of the air-conditioning system, such as A control board of an air-conditioning system, the method comprising the following steps:

S110: Obtain the current working parameters of the air conditioning system;

The air conditioning system includes a compressor, an outdoor heat exchanger, a throttling mechanism and an indoor heat exchanger which are communicated in sequence. Specifically, the compressor is a two-stage compressor, and the air-conditioning system also includes a flasher. After the liquid refrigerant flows out of the condenser, it is throttled by a throttling mechanism to generate a part of gas, and is injected into the compressor from the enthalpy increasing pipe by means of the flasher. , used to increase the enthalpy of compressor air supply. Wherein, the current working parameter refers to the working parameter of the air-conditioning system at the current moment. Specifically, the control device may acquire the current working parameters of the air conditioning system.

S120: Determine the relative relationship between the current working parameter and the reference working parameter;

Among them, the reference working parameters are the working parameters of the air-conditioning system when the air-conditioning system adopts standard connecting pipes (that is, the pipes connected between the indoor heat exchanger and the outdoor heat exchanger). When the power of the air-conditioning system is determined, the control equipment Benchmark operating parameters can be determined using standard connecting pipes. If the length of the connecting pipe used by the air-conditioning system changes, correspondingly, the amount of refrigerant injected will change, and the working parameters of the air-conditioning system will change. Specifically, the relative relationship may be the magnitude relationship between the current working parameter and the reference working parameter.

S130: Control the compressor to work from the reference exhaust gas temperature to the target exhaust gas temperature according to the relative relationship, and/or control the compressor to work from the upper limit of the reference frequency to the upper limit of the target frequency.

According to the relative relationship, the compressor is controlled to work from the reference discharge temperature to the target discharge temperature, and/or the compressor is controlled to be adjusted from the upper limit of the reference frequency to the upper limit of the target frequency, that is, the control device can control the discharge temperature of the compressor. The target exhaust gas temperature required under the current connecting pipe length is reached, and/or the upper frequency limit of the compressor is controlled to reach the target frequency upper limit required under the current connecting pipe length.

In the control method of the above air-conditioning system, the compressor is controlled to operate at the target exhaust temperature from the reference exhaust temperature according to the relative relationship between the current working parameter and the reference working parameter, and/or the compressor is controlled to be adjusted from the upper limit of the reference frequency to the target frequency. It can work under the upper limit, so that the exhaust temperature and/or frequency upper limit of the compressor of the air conditioning system can meet the requirements of the current connecting pipe length, reduce the accumulation of refrigerant in the flasher, and reduce the suction belt during the compressor air supply. liquid, so that the operation reliability of the air conditioning system is high.

It should be noted here that the target exhaust temperature may be greater than the reference exhaust temperature, may also be lower than the reference exhaust temperature, or may be equal to the reference exhaust temperature; the upper limit of the target frequency may be greater than the upper limit of the reference frequency, or may be smaller than the upper limit of the reference frequency , and may also be equal to the upper limit of the reference frequency.

In one embodiment, step S130 includes:

According to the relative relationship, the compressor is controlled from the reference exhaust temperature to work under the target exhaust temperature, and the compressor is controlled from the upper limit of the reference frequency to the upper limit of the target frequency.

That is, in this embodiment, according to the relative relationship between the current working parameter and the reference working parameter, the compressor is controlled to operate from the reference discharge temperature to the target discharge temperature, and the compressor is controlled to be adjusted from the upper limit of the reference frequency to the upper limit of the target frequency. Work so that both the discharge temperature and the upper frequency limit of the compressor of the air conditioning system meet the requirements under the current length of the connecting pipe.

It can be understood that, in other embodiments, the compressor can be individually controlled to operate at the target exhaust gas temperature from the reference exhaust gas temperature according to the relative relationship between the current working parameters and the reference working parameters, or work according to the current working parameters and the reference temperature. The relative relationship of the parameters individually controls the compressor to work under the upper limit of the reference frequency to the upper limit of the target frequency, which is not limited here.

In one embodiment, the current working parameters include a first current working parameter and a second current working parameter.

Step S120 includes:

A first relative relationship between the first current operating parameter and the first reference operating parameter and a second relative relationship between the second current operating parameter and the second reference operating parameter are determined.

Step S130 includes:

According to the first relative relationship and the second relative relationship, the compressor is controlled to operate from the reference exhaust gas temperature to the target exhaust gas temperature, and/or the compressor is controlled to operate from the upper limit of the reference frequency to the upper limit of the target frequency.

By acquiring the first current working parameter and the second current working parameter, and determining the first relative relationship between the first current working parameter and the first reference working parameter and the first relative relationship between the second current working parameter and the second reference working parameter Two relative relationships, according to the first relative relationship and the second relative relationship, the compressor is controlled to operate from the reference exhaust gas temperature to the target exhaust gas temperature, and/or the compressor is controlled to operate from the upper limit of the reference frequency to the upper limit of the target frequency. Ensure the accuracy of control.

It can be understood that, in other embodiments, the current working parameters are not limited to include only two working parameters, but may also include three or more than three working parameters, which are not limited herein.

In the first embodiment, the first current working parameter is the current temperature difference of the current connecting pipe, and the second current working parameter is the current working current of the compressor. The current temperature difference is the absolute value of the difference between the refrigerant inlet temperature of the current connection pipe and the refrigerant outlet temperature of the current connection pipe. Specifically, temperature sensors can be installed at the refrigerant inlet and refrigerant outlet of the current connecting pipe, and the control device obtains the refrigerant inlet temperature and refrigerant outlet temperature by detecting the collected data of the two temperature sensors in real time. An ammeter can also be electrically connected to the compressor, and the control device can obtain the current working current of the compressor by monitoring the collected data of the ammeter in real time.

In the cooling mode, after being compressed by the compressor, a high-temperature and high-pressure gaseous refrigerant is formed, which first enters the outdoor heat exchanger for heat exchange to form a high-pressure liquid refrigerant, and then flows to the indoor heat exchanger for heat exchange to form a low-temperature and low-pressure refrigerant, which flows back to the compressor again. Then in the cooling mode, the above-mentioned current temperature difference is the difference between the refrigerant outlet temperature of the outdoor heat exchanger and the refrigerant inlet temperature of the indoor heat exchanger. In the heating mode, the flow direction of the refrigerant is opposite to that in the cooling mode. In the heating mode, the current temperature difference is the difference between the refrigerant outlet temperature of the indoor heat exchanger and the refrigerant inlet temperature of the outdoor heat exchanger.

As shown in FIG. 2 , when the first current working parameter is the current temperature difference of the current connecting pipe, and the second current working parameter is the current working current of the compressor, step S130 includes:

When the difference between the current temperature difference minus the reference temperature difference is smaller than the first temperature value, and the difference between the current current minus the reference current is smaller than the first current value, the adjustment target exhaust temperature is smaller than the reference exhaust temperature, and the adjustment target frequency upper limit is greater than Base frequency upper limit;

Since the refrigerant will exchange heat with the environment during the flow of the connecting pipe, resulting in a loss of cooling capacity, the length change of the connecting pipe can be determined according to the relationship between the current temperature difference and the reference temperature difference. If the difference between the current temperature difference and the reference temperature difference is smaller than the first temperature value, it proves that the length of the current connecting pipe is short. And there is a linear relationship between the working current of the compressor and the compressor load, that is, the working current of the compressor increases with the increase of the compressor load, that is, the working current of the compressor increases with the increase of the refrigerant injection amount. If the difference between the current current minus the reference current is smaller than the first current value, it proves that the current refrigerant injection amount is less.

It is precisely because the length of the current connecting pipe is short and the current refrigerant injection volume is small, the risk of liquid replenishment of the flash evaporator is small, that is, the risk of causing the liquid level of the flash evaporator to be high is small, so the compressor enthalpy increase port suction The risk of airborne liquids is small. Appropriately reducing the exhaust temperature of the compressor and the upper limit of the frequency of the compressor will not cause the refrigerant level in the flash tank to be too high. Appropriately lowering the exhaust temperature of the compressor is conducive to the improvement of the medium pressure for air supplementation and enthalpy increase, and ensures the energy efficiency of the whole machine in this case; at the same time, appropriately increasing the frequency upper limit of the compressor can effectively increase the cooling capacity of the whole machine.

Specifically, the target exhaust temperature can be adjusted to be less than the reference exhaust temperature and the upper limit of the target frequency can be adjusted to be larger than the upper limit of the reference frequency according to a preset constant, and the preset constant varies according to different models. For example, for 24K and 36K models, target exhaust temperature=(0.85±0.05)*reference exhaust temperature, target frequency upper limit=(1.3±0.1)*reference frequency upper limit.

When the difference between the current temperature difference and the reference temperature difference is greater than or equal to the first temperature value and less than the second temperature value, and when the difference between the current current and the reference current is greater than or equal to the first current value and less than the second current value, adjust the target The exhaust temperature is equal to the reference exhaust temperature, and the upper limit of the adjustment target frequency is equal to the upper limit of the reference frequency;

If the difference between the current temperature difference and the reference temperature difference is greater than or equal to the first temperature value and less than the second temperature value, and the difference between the current current minus the reference current is greater than or equal to the first current value and less than the second current value, it proves that the current connection pipe The length of the connecting pipe is moderate (the length of the current connecting pipe is not much different from the length of the reference connecting pipe). , the upper limit of the adjustment target frequency is equal to the upper limit of the reference frequency.

For example, for 24K and 36K models, target exhaust temperature=(1±0.05)*reference exhaust temperature, target frequency upper limit=(1±0.1)*reference frequency upper limit.

When the difference between the current temperature difference and the reference temperature difference is greater than or equal to the second temperature value, and when the difference between the current current and the reference current is greater than or equal to the second current value, the target exhaust gas temperature is adjusted to be greater than the reference exhaust gas temperature, and the target frequency is adjusted The upper limit is less than the base frequency upper limit.

If the difference between the current temperature difference minus the reference temperature difference is greater than or equal to the second temperature value, and the difference between the current current minus the reference current is greater than or equal to the second current value, it proves that the length of the current connecting pipe is longer and the current refrigerant injection volume is larger. It is precisely because the length of the current connecting pipe is long and the current refrigerant injection volume is large, the risk of liquid replenishment of the flash evaporator is high, that is, the risk of causing the liquid level of the flash evaporator to be high is high, so the compressor enthalpy increase port suction There is a high risk of fluids. Then appropriately increase the exhaust temperature of the compressor and increase the upper limit of the frequency of the compressor, so as to avoid the occurrence of excessive liquid level in the flasher.

For example, for 24K and 36K models, target exhaust temperature=(1.2±0.05)*reference exhaust temperature, target frequency upper limit=(0.8±0.1)*reference frequency upper limit.

It should also be noted here that the first temperature value and the second temperature value may be set according to the working conditions, for example, the first temperature value and the second temperature value may be set according to the ambient temperature. In this embodiment, the first temperature value may be set to be less than 1°C, and the second temperature value may be set to be less than 3°C. The first current value and the second current value are different according to different models. For example, for the 24K model and the 36K model, the first current value is set to 6A±0.3A, and the second current value is set to 9A±0.3A.

In the second embodiment, the difference from the first embodiment is that the second current operating parameter is the current power of the compressor.

At this time, step S130 includes:

When the difference between the current temperature difference minus the reference temperature difference is smaller than the first temperature value, and the difference between the current power minus the reference power is smaller than the first power value, the adjustment target exhaust temperature is smaller than the reference exhaust temperature, and the adjustment target frequency upper limit is greater than Base frequency upper limit;

When the difference between the current temperature difference and the reference temperature difference is greater than or equal to the first temperature value and less than the second temperature value, and when the difference between the current power and the reference power is greater than or equal to the first power value and less than the second power value, adjust the target The exhaust temperature is equal to the reference exhaust temperature, and the upper limit of the adjustment target frequency is equal to the upper limit of the reference frequency;

When the difference between the current temperature difference and the reference temperature difference is greater than or equal to the second temperature value, and when the difference between the current power and the reference power is greater than or equal to the second power value, the target exhaust gas temperature is adjusted to be greater than the reference exhaust gas temperature, and the target frequency is adjusted The upper limit is less than the base frequency upper limit.

In the third embodiment, the difference from the second embodiment is that: the first current working parameter is the current suction superheat of the compressor, where the current suction superheat=the suction temperature of the compressor - the low pressure side of the compressor the corresponding saturation temperature. Since the refrigerant will exchange heat with the environment during the flow of the connecting pipe, resulting in a loss of cooling capacity, the length change of the connecting pipe can also be determined according to the relationship between the current suction superheat and the reference suction superheat.

At this time, step S130 includes:

When the difference between the current temperature intake superheat minus the reference intake superheat is smaller than the first superheat value, and the difference between the current power minus the reference power is smaller than the first power value, adjust the target exhaust temperature to be less than the reference exhaust temperature Air temperature, adjust the target frequency upper limit is greater than the reference frequency upper limit;

When the difference between the current temperature intake superheat minus the reference intake superheat is greater than or equal to the first superheat value and less than the second superheat value, and the difference between the current power minus the reference power is greater than or equal to the first power value and When it is less than the second power value, the adjustment target exhaust temperature is equal to the reference exhaust temperature, and the adjustment target frequency upper limit is equal to the reference frequency upper limit;

When the difference between the current temperature intake superheat minus the reference intake superheat is greater than or equal to the second superheat value, and when the difference between the current power minus the reference power is greater than or equal to the second power value, adjust the target exhaust gas temperature to be greater than or equal to Baseline exhaust temperature, adjust the upper limit of target frequency to be less than the upper limit of reference frequency.

In the fourth embodiment, the difference from the third embodiment is that the second current working parameter is the current subcooling degree of the condenser, and the subcooling degree of the condenser increases with the increase of the refrigerant injection amount.

At this time, step S130 includes:

When the difference between the current subcooling degree minus the reference subcooling degree is smaller than the first subcooling degree value, and the difference between the current power minus the reference power is smaller than the first power value, adjust the target exhaust gas temperature to be smaller than the reference exhaust gas temperature , the upper limit of the adjustment target frequency is greater than the upper limit of the reference frequency;

When the difference between the current subcooling degree minus the reference subcooling degree is greater than or equal to the first subcooling degree value and less than the second subcooling degree value, and the difference value of the current power minus the reference power is greater than or equal to the first power value and less than At the second power value, adjust the target exhaust temperature to be equal to the reference exhaust temperature, and adjust the upper limit of the target frequency to be equal to the upper limit of the reference frequency;

When the difference between the current subcooling degree minus the reference subcooling degree is greater than or equal to the second subcooling degree value, and when the difference between the current power minus the reference power is greater than or equal to the second power value, adjust the target exhaust gas temperature to be greater than the reference exhaust gas temperature If the air temperature is adjusted, the upper limit of the target frequency is less than the upper limit of the reference frequency.

In one embodiment, as shown in FIG. 3, a control device for an air conditioning system is provided, including: an acquisition module 200, a determination module 300, and a control module 400, wherein the acquisition module 200 is used to acquire current working parameters of the air conditioning system . The determining module 300 is used to determine the relative relationship between the current working parameter and the reference working parameter. The control module 400 is configured to control the compressor to operate from the reference discharge temperature to the target discharge temperature according to the relative relationship, and/or to control the compressor to operate from the reference frequency upper limit to the target frequency upper limit.

The control device of the above-mentioned air conditioning system, according to the relative relationship between the current working parameter and the reference working parameter, controls the compressor to be adjusted from the reference exhaust gas temperature to the target exhaust gas temperature, and/or controls the compressor to be adjusted from the upper limit of the reference frequency to the upper limit of the target frequency It can work under the air-conditioning system, so that the exhaust temperature and/or frequency upper limit of the compressor of the air-conditioning system can meet the requirements of the current connecting pipe length, reduce the accumulation of refrigerant in the flasher, and reduce the suction of the compressor during the air supply process. , so that the operation reliability of the air conditioning system is high.

In one embodiment, the determination module 300 includes a first determination module and a second determination module. The first determination module is used to determine the first relative relationship between the first current working parameter and the first reference working parameter, and the second determination module is used to determine the first relative relationship between the second current working parameter and the second reference working parameter. Two relative relationship.

By acquiring the first current working parameter and the second current working parameter, and determining the first relative relationship between the first current working parameter and the first reference working parameter and the first relative relationship between the second current working parameter and the second reference working parameter Two relative relationships, according to the first relative relationship and the second relative relationship, the compressor is controlled to operate from the reference exhaust temperature to the target exhaust temperature, and/or the compressor is controlled to be adjusted from the upper limit of the reference frequency to the upper limit of the target frequency to operate, The accuracy of the control can be guaranteed.

Specifically, the first current working parameter is the current suction superheat degree of the compressor or the current temperature difference of the current connecting pipe, and the second current working parameter is the current working current of the compressor, the current subcooling degree of the condenser and the current temperature difference of the compressor. One of the working power.

In one embodiment, as shown in FIG. 4, a control device is provided, the control device including a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the control device is used to provide computing and control capabilities. The memory of the control device includes a non-volatile storage medium and an internal memory. The nonvolatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the execution of the operating system and computer programs in the non-volatile storage medium. The network interface of the control device is used to communicate with external terminals through a network connection. The computer program implements a control method of an air conditioning system when executed by a processor. The display screen of the control device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the control device can be a touch layer covered on the display screen, or a button, a trackball or a touchpad set on the shell of the control device , or an external keyboard, trackpad, or mouse.

Those skilled in the art can understand that this is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer equipment to which the solution of the present application is applied. The specific computer device may include more than those shown in the figure. or fewer components, or combine certain components, or have a different arrangement of components.

In one embodiment, a control device is provided, including a memory and a processor, where a computer program is stored in the memory, and the processor implements the steps of the aforementioned air-conditioning system control method when the processor executes the computer program.

The above-mentioned control device, because it realizes the steps of the aforementioned air-conditioning system control method, in the same way, can reduce the accumulation of refrigerant in the flasher, reduce the suction and liquid in the process of compressor air supply, and make the operation reliability of the air-conditioning system high. .

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of the aforementioned air-conditioning system control method.

The above-mentioned computer-readable storage medium can realize the steps of the aforementioned control method of the air-conditioning system, and similarly, it can reduce the accumulation of the refrigerant in the flasher, and reduce the inhalation with liquid in the process of compressor air supply and Zenghan, so that the air-conditioning system can be operated. High operational reliability.

In one embodiment, an air-conditioning system is provided, comprising the aforementioned control device, the air-conditioning system is provided with a compressor, and the control device is connected to the compressor of the air-conditioning system.

The above-mentioned air-conditioning system adopts the steps of the above-mentioned control device to execute the above-mentioned control method of the air-conditioning system. Similarly, the accumulation of the refrigerant in the flasher can be reduced, and the suction of the air-conditioning system can be reduced. high operational reliability.

The air-conditioning system 100 includes components required for cooling or heating. Specifically, as shown in FIG. 5 , the air conditioning system 100 includes a compressor 10 , a four-way valve 20 , an outdoor heat exchanger 30 , a flash evaporator 40 , a connecting pipe 50 , an enthalpy increasing pipe 60 , an enthalpy increasing valve 70 , and a first throttle The mechanism 80 , the second throttle mechanism 90 and the indoor heat exchanger 110 . The compressor 10 has an exhaust port 11, a suction port 12 and an enthalpy increasing port 13 (refer to FIG. 6), and the four-way valve 20 has a first valve port 21, a second valve port 22, a third valve port 23 and a fourth valve mouth 24. The exhaust port 11 of the compressor 10 is communicated with the first valve port 21 of the four-way valve 20, and the two ends of the outdoor heat exchanger 30 are respectively communicated with the second valve port 22 of the four-way valve 20 and one end of the connecting pipe 50. The evaporator 40 is assembled on the connecting pipe 50, the connecting pipe 50 is divided into a first section and a second section by the flash evaporator 40, the first throttling mechanism 80 is assembled on the first section, and the second throttling mechanism 90 is assembled on the second section The two ends of the indoor heat exchanger 110 are respectively communicated with the other end of the connecting pipe 50 and the third valve port 23 of the four-way valve 20 , the suction port 12 of the compressor 10 and the fourth valve port 24 of the four-way valve 20 Connected. The enthalpy increasing pipe 60 is communicated between the flasher 40 and the enthalpy increasing port 13 of the compressor 10 , and the enthalpy increasing valve 70 is assembled on the enthalpy increasing pipe 60 .

Further, the air-conditioning system 100 further includes a gas-liquid separator 120, which is arranged between the fourth valve port 24 of the four-way valve 20 and the suction port 12 of the compressor 10 for realizing gas-liquid separation.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage In the medium, when the computer program is executed, it may include the processes of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database or other medium used in the various embodiments provided in this application may include non-volatile and/or volatile memory. Nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Road (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims (11)

1. A method of controlling an air conditioning system, the method comprising:

acquiring current working parameters of an air conditioning system;

determining a relative relationship between the current working parameter and a reference working parameter;

and controlling the compressor to work under the condition that the reference exhaust temperature is adjusted to the target exhaust temperature according to the relative relation, and/or controlling the compressor to work under the condition that the reference frequency upper limit is adjusted to the target frequency upper limit.

2. The control method of an air conditioning system according to claim 1, wherein the step of controlling the compressor to operate with the reference discharge temperature adjusted to the target discharge temperature and/or the step of controlling the compressor to operate with the reference upper frequency limit adjusted to the target upper frequency limit according to the relative relationship comprises:

and controlling the compressor to work under the condition that the reference exhaust temperature is adjusted to the target exhaust temperature according to the relative relation, and controlling the compressor to work under the condition that the reference upper frequency limit is adjusted to the target upper frequency limit.

3. The control method of an air conditioning system according to claim 1 or 2, wherein the current operating parameters include a first current operating parameter and a second current operating parameter;

said step of determining a relative relationship between said current operating parameter and a reference operating parameter comprises:

determining a first relative relationship between the first current working parameter and a first reference working parameter and a second relative relationship between the second current working parameter and a second reference working parameter;

the step of controlling the compressor to work under the condition that the reference exhaust temperature is adjusted to the target exhaust temperature according to the relative relation, and/or the step of controlling the compressor to work under the condition that the reference frequency upper limit is adjusted to the target frequency upper limit comprises the following steps:

and controlling the compressor to work under the condition that the reference exhaust temperature is adjusted to the target exhaust temperature according to the first relative relation and the second relative relation, and/or controlling the compressor to work under the condition that the reference upper frequency limit is adjusted to the target upper frequency limit.

4. The control method of an air conditioning system according to claim 3, wherein the first current operating parameter is a current temperature difference of a current connection pipe, and the second current operating parameter is a current operating current of the compressor;

the current temperature difference is an absolute value of a difference value between the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe.

5. The method of claim 4, wherein the step of controlling the compressor to operate with the reference discharge temperature adjusted to the target discharge temperature according to the first relative relationship and the second relative relationship, and/or the step of controlling the compressor to operate with the reference upper frequency limit adjusted to the target upper frequency limit comprises:

when the difference value of subtracting the reference temperature difference from the current temperature difference is smaller than a first temperature value and the difference value of subtracting the reference current from the current is smaller than a first current value, adjusting the target exhaust temperature to be smaller than the reference exhaust temperature and adjusting the target upper frequency limit to be larger than the reference upper frequency limit;

when the difference value of the current temperature difference minus the reference temperature difference is greater than or equal to a first temperature value and smaller than a second temperature value, and the difference value of the current minus the reference current is greater than or equal to a first current value and smaller than a second current value, adjusting the target exhaust temperature to be equal to the reference exhaust temperature, and adjusting the target frequency upper limit to be equal to the reference frequency upper limit;

and when the difference value of the current temperature difference minus the reference temperature difference is larger than or equal to a second temperature value and the difference value of the current minus the reference current is larger than or equal to a second current value, adjusting the target exhaust temperature to be larger than the reference exhaust temperature and adjusting the target frequency upper limit to be smaller than the reference frequency upper limit.

6. The control method of an air conditioning system according to claim 3, wherein the first current operating parameter is a current suction superheat of the compressor, and the second current operating parameter is a current operating current of the compressor or a current operating temperature of the condenser or a current operating power of the compressor.

7. A control device of an air conditioning system, characterized by comprising:

the acquisition module is used for acquiring the current working parameters of the air conditioning system;

the determining module is used for determining the relative relationship between the current working parameter and a reference working parameter;

and the control module is used for controlling the compressor to work under the condition that the reference exhaust temperature is adjusted to the target exhaust temperature according to the relative relation, and/or controlling the compressor to work under the condition that the reference frequency upper limit is adjusted to the target frequency upper limit.

8. The control device of an air conditioning system according to claim 7, wherein the determination module includes a first determination module and a second determination module,

the first determining module is used for determining a first relative relationship between a first current working parameter and a first reference working parameter, and the second determining module is used for determining a second relative relationship between a second current working parameter and a second reference working parameter.

9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.

10. A control device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 6 when executing the computer program.

11. An air conditioning system, characterized in that it comprises a control device according to claim 10, which is provided with a compressor, which control device is connected to the compressor of the air conditioning system.

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