WO2021004486A1

WO2021004486A1 - Air conditioning device control method and air conditioning device

Info

Publication number: WO2021004486A1
Application number: PCT/CN2020/100886
Authority: WO
Inventors: 肖克强; 韩涛; 郝红波
Original assignee: 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2019-07-09
Filing date: 2020-07-08
Publication date: 2021-01-14
Also published as: CN112212480A; CN112212480B

Abstract

An air conditioning device control method, applied to a heating mode, and comprising the following steps: at startup, controlling a compressor to be up-converted to a natural frequency for running, and enabling an outdoor fan to work at a highest set rotating speed, and an electronic expansion valve to be started to a target opening degree; determining an outdoor environment temperature interval of an outdoor environment temperature in real time, and controlling, according to the determined outdoor environment temperature interval, the compressor to be up-converted to a corrected oil return frequency corresponding to the outdoor environment temperature interval; determining whether timing of a first timer reaches an effective timing duration; and when the timing of the first timer reaches the effective timing duration, controlling, according to the determined outdoor environment temperature interval, the compressor to be up-converted to a target frequency corresponding to the outdoor environment temperature interval. Also disclosed is an air conditioning device. In many cases, the present invention can achieve the purpose of quickly reaching a desired heating effect, and has the advantage of high comfort.

Description

Control method of air conditioning equipment and air conditioning equipment

Technical field

The invention belongs to the technical field of air conditioning, and specifically relates to a control method of an air conditioning device, and an air conditioning device adopting the control method.

Background technique

Heat pump equipment, such as a heat pump air conditioner, is a device that transfers heat energy from a low-level heat source to a high-level heat source. It can convert the low-grade heat energy in the natural air into high-grade heat energy that can be utilized through mechanical work. The main components of heat pump air conditioners include compressor, condenser, throttle and evaporator. When heating in winter, the four-way valve is in the heat pump working position, the high-pressure refrigerant vapor discharged from the compressor enters the indoor heat exchanger, and the indoor heat exchanger works in a condensing state. The refrigerant vapor condenses and releases latent heat to heat the indoor air to achieve indoor heating purposes. The condensed commercial refrigerant flows through the throttling device and then enters the outdoor heat exchanger. The outdoor heat exchanger works in the evaporation state. The refrigerant absorbs external heat and evaporates, and the evaporated vapor enters the compressor through the compressor suction port to complete the heating cycle.

In the existing heat pump air conditioner, after the start-up, the compressor will first increase the frequency to the first oil return platform to run for a period of time, and then adjust to the second oil return platform to run to avoid the refrigerant from taking too much compressor lubrication The oil causes the compressor to fail, and each oil return platform corresponds to a set oil return frequency. This process will extend the time to eliminate the temperature deviation in the room. In order to prevent the supply air of too low temperature from being sent into the air-conditioned room to affect the user experience, in the prior art, the guide plate of the indoor unit is usually set to work in a cold wind-proof position until the indoor coil temperature rises to the set temperature and the air guide plate is controlled to return Normal air supply position. The whole process takes 2-5 minutes, long waiting time and poor user experience.

The above-mentioned information disclosed in the background art is only used to increase the understanding of the background art of the application, and therefore, it may include the prior art that does not constitute the prior art known to those of ordinary skill in the art.

Summary of the invention

Aiming at the problems of long waiting time for starting the heat pump air conditioner and poor user experience in the prior art, the present invention provides a method for controlling air conditioning equipment.

A control method of air conditioning equipment, applied to heating mode; including the following steps:

When starting, control the compressor to run at the natural frequency, the outdoor fan works at the highest set speed, and the electronic expansion valve opens to the target opening;

Determine the outdoor environment temperature interval where the real-time outdoor environment temperature is located, and control the compressor to increase the frequency to the corrected oil return frequency corresponding to the outdoor environment temperature interval according to the determined outdoor environment temperature interval;

Determine whether the timing of the first timer reaches the effective timing duration;

When the timing of the first timer reaches the effective timing duration, the frequency of the compressor is controlled to increase to a target frequency corresponding to the outdoor environmental temperature interval according to the determined outdoor environmental temperature interval.

Further, the following steps are performed when determining the outdoor ambient temperature interval in which the real-time outdoor ambient temperature is located and controlling the compressor to increase the frequency to the corrected oil return frequency corresponding to the outdoor ambient temperature interval according to the determined outdoor ambient temperature interval:

Determine whether the real-time outdoor ambient temperature is less than or equal to the first outdoor ambient temperature threshold; if the real-time outdoor ambient temperature is less than or equal to the first outdoor ambient temperature threshold, then the real-time outdoor ambient temperature is within the first outdoor ambient temperature range, and the compressor is controlled to increase the frequency to the first outdoor ambient temperature. Correct the oil return frequency; or

Determine whether the real-time outdoor ambient temperature is greater than the first outdoor ambient temperature threshold; if the real-time outdoor ambient temperature is greater than the first outdoor ambient temperature threshold, then the real-time outdoor ambient temperature is in the second outdoor ambient temperature range, and the compressor is controlled to increase the frequency to the second correction level Oil frequency

Wherein, the first corrected oil return frequency is greater than the second corrected oil return frequency.

Further, when the timing of the first timer reaches the effective timing duration, the following steps are executed when the compressor is controlled to increase the frequency to the target frequency corresponding to the outdoor ambient temperature interval according to the determined outdoor environment temperature interval:

If the real-time outdoor environment temperature is in the first outdoor environment temperature range, control the compressor to increase the frequency from the first corrected oil return frequency to the highest heating setting frequency;

If the real-time outdoor ambient temperature is in the second outdoor ambient temperature range, it is determined whether the real-time outdoor ambient temperature is less than or equal to the second outdoor ambient temperature threshold; if the real-time outdoor ambient temperature is less than or equal to the second outdoor ambient temperature threshold, the compressor is controlled from the The second corrected oil return frequency is increased to the set maximum frequency corresponding to the real-time outdoor ambient temperature; if the real-time outdoor ambient temperature is greater than the second outdoor ambient temperature threshold, it is determined whether the real-time indoor ambient temperature is less than or equal to the indoor ambient temperature threshold, if If the real-time indoor ambient temperature is less than or equal to the indoor ambient temperature threshold, control the compressor to increase the frequency from the second corrected oil return frequency to the set target frequency;

The second outdoor environment temperature threshold is greater than the first outdoor environment temperature threshold.

Further, before determining the outdoor ambient temperature interval in which the real-time outdoor ambient temperature is located, the following steps are further included:

Determine whether the real-time outdoor ambient temperature is greater than the oil return protection outdoor ambient temperature threshold and whether the real-time indoor ambient temperature is greater than the oil return protection indoor ambient temperature threshold;

If the real-time outdoor ambient temperature is greater than the oil-return protection outdoor ambient temperature threshold and the real-time indoor ambient temperature is greater than the oil-return protection indoor ambient temperature threshold, control the compressor to increase the frequency from the natural frequency to the set maximum frequency limit corresponding to the real-time outdoor ambient temperature frequency.

Further, it is determined whether the indoor heat exchanger coil temperature is less than or equal to the first intervention threshold temperature, and if the indoor heat exchanger coil temperature is less than or equal to the first intervention threshold temperature, the indoor fan is controlled to be in a shutdown state; if the indoor coil temperature is greater than The first intervention threshold temperature controls the indoor fan to operate at the lowest wind speed.

Further, it is determined whether the temperature of the indoor heat exchanger coil is greater than or equal to the second intervention threshold temperature, and if the temperature of the indoor heat exchanger coil is greater than or equal to the second intervention threshold temperature and the time of the second timer reaches the effective time duration, the control room The fan runs at the set wind speed.

Further, when the indoor heat exchanger coil temperature is greater than or equal to the second intervention threshold temperature and the time of the second timer reaches the effective time duration, the air outlet guide plate is controlled to return to the set position from the cold wind prevention position.

Further, when the indoor fan is running, the electric heating device is controlled to turn on until the electric heating shutdown condition is satisfied, and the electric heating device is controlled to turn off.

Further, the compressor runs at the target frequency, and the operation cycle timer starts timing;

When the timing duration of the running cycle timer reaches the effective timing duration, the compressor is controlled to run according to the PID algorithm.

In the control method of the air conditioning equipment disclosed in the present invention, the oil return frequency is expected to be corrected based on the current indoor ambient temperature formed based on the real-time outdoor ambient temperature, taking into account the oil return requirements of the compressor and the basic heating requirements of the air conditioner, In the start-up phase, a more reasonable corrected oil return frequency can be obtained through correction and compensation, which further makes the compressor work according to the target frequency corresponding to different outdoor ambient temperature ranges, and can achieve the purpose of quickly achieving the ideal heating effect in various situations.

At the same time, an air conditioning device is also disclosed, which adopts a control method, and the control method includes the following steps:

The air conditioning equipment disclosed in the present invention has the advantage of high adjustment comfort.

After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become clearer.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

Fig. 1 is a flowchart of a specific embodiment of a method for controlling air conditioning equipment disclosed in the present invention;

FIG. 2 is a flowchart of a specific implementation manner when the compressor is controlled to increase the frequency to the corrected oil return frequency corresponding to the outdoor ambient temperature interval in FIG. 1;

FIG. 3 is a flowchart of a specific implementation manner when controlling the compressor in FIG. 1 to increase frequency to a target frequency corresponding to the outdoor ambient temperature range;

Fig. 4 is a flowchart of another specific implementation manner when the compressor is controlled to increase the frequency to the target frequency corresponding to the outdoor ambient temperature range in Fig. 1.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the present invention in detail with reference to the accompanying drawings and embodiments.

The terms "first", "second", "third", etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than describing a specific order. In addition, the terms "including" and "having" and any variations of them represent non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.

In the present invention, "embodiment" means that a specific feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. In the specification, the appearance of the phrase in various positions does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art can understand that the embodiments described herein can be combined with other embodiments.

Fig. 1 is a flowchart of a specific implementation manner of a control method of an air conditioning device. The air conditioning equipment is specifically an air conditioner, especially an inverter air conditioner, which can timely meet the indoor cooling and heating requirements by controlling the refrigerant circulation of the compressor and the refrigerant flow entering the indoor heat exchanger. The compressor is driven by a variable frequency motor, and the speed of the motor can be continuously changed according to the demand of indoor cooling capacity, that is, the frequency of the compressor is adjusted. The flow of refrigerant entering the indoor heat exchanger is also adjusted by the electronic expansion valve. The electronic expansion valve acts according to various preset adjustment targets according to the instructions of the air conditioner controller to quickly adjust the opening degree and quickly control the flow of refrigerant.

The control method provided in this embodiment includes the following steps:

In step S100, when the machine is turned on, the compressor is controlled to run at a natural frequency, the outdoor fan works at the highest set speed, and the electronic expansion valve is opened to the target opening.

Step S102: Determine the outdoor environment temperature interval in which the real-time outdoor environment temperature is located, and control the compressor to increase the frequency to a corrected oil return frequency corresponding to the outdoor environment temperature interval according to the determined outdoor environment temperature interval.

Step S104: It is determined whether the timing of the first timer reaches the effective timing duration.

Step S106: When the timing of the first timer reaches the effective timing duration, control the compressor to increase the frequency to a target frequency corresponding to the outdoor environmental temperature interval according to the determined outdoor environmental temperature interval.

Specifically, when the air conditioner is powered on, it first controls the compressor to start, and drives its operating frequency up to its natural frequency according to a preset open-loop control algorithm. The natural frequency is a preset optimal value. When the compressor works at the natural frequency, the oil return rate of the compressor meets the basic expectations and will not cause shutdown. The natural frequency can be set to 50Hz, and the open loop control algorithm can be set to control the compressor's operating frequency to rise to 50Hz within 4 seconds. At the same time, the outdoor fan is set to work at the highest set speed, and the electronic expansion valve is opened to the target opening. Under this condition, after starting, the air conditioner can quickly work in a relatively stable state, and the refrigerant in the air conditioning system maintains a certain flow and speed, which can ensure a certain return flow rate of the compressor lubricating oil.

Different from the control method in the prior art that remains on the first oil return platform until the preset time is reached, in this embodiment, the compressor frequency is further controlled in accordance with the indoor and outdoor environment, taking into account the compressor oil return demand, and during the start-up phase Reduce the deviation between the indoor ambient temperature and the target temperature as soon as possible. To achieve this goal, further determine the outdoor ambient temperature range where the real-time outdoor ambient temperature is located, and control the compressor to increase the frequency to the corrected oil return frequency corresponding to the outdoor ambient temperature range based on the determined outdoor ambient temperature range.

The real-time outdoor ambient temperature can be obtained by sampling a temperature sensor set on the outdoor heat exchanger, or can be obtained from an external terminal through wireless communication.

In FIGS. 2 and 4, Y means the judgment is yes, and N means the judgment is no.

As shown in Figure 2, the determination of the outdoor ambient temperature range in which the real-time outdoor ambient temperature is located specifically includes the following steps:

In step S200, it is first determined whether the real-time outdoor environment temperature is less than or equal to the first outdoor environment temperature threshold. The first outdoor environment temperature threshold corresponds to a situation where the outdoor environment temperature is low. When the real-time outdoor environment temperature is less than or equal to the first outdoor environment temperature threshold, it can be expected that the indoor environment temperature has a large deviation from the target indoor temperature. According to the traditional control method, it takes a long time for the indoor environment to reach the target indoor temperature. The level of comfort. The first outdoor ambient temperature threshold may preferably be set to 5 degrees Celsius. Step S202: If the real-time outdoor environment temperature is less than or equal to the first outdoor environment temperature threshold, the real-time outdoor environment temperature is in the first outdoor environment temperature range. Taking into account the requirements of compressor oil return and heating comfort during the start-up phase, quickly control the compressor frequency up to a higher first corrected oil return frequency (step S206), so that the refrigerant has a higher flow rate when the temperature is lower . The compressor can play a regulating role to reduce the temperature difference between the room temperature and the target temperature. The first corrected oil return frequency is greater than the natural frequency, and the first corrected oil return frequency is preferably set to 70 Hz, and the rate of frequency up from the natural frequency to the first corrected oil return frequency can be set to 2 Hz/s. In this way, when the outdoor temperature is low, the compressor can work at a relatively high frequency in about 15s after starting.

If the real-time outdoor environment temperature is greater than the first outdoor environment temperature threshold, the outdoor environment temperature is relatively mild. It can be expected that although the indoor environment temperature still has a certain deviation from the target indoor temperature, the time to reach the comfort level is relatively controllable. Therefore, referring to step S204, when the real-time outdoor ambient temperature is greater than the first outdoor ambient temperature threshold, it is determined that the real-time outdoor ambient temperature is in the second outdoor ambient temperature range, taking into account the compressor oil return and comfort requirements, and quickly controlling the compressor rise Frequency to the second corrected oil return frequency (step S208), so that the refrigerant has a relatively moderate flow rate when the temperature is relatively mild. The second corrected oil return frequency is less than the first corrected oil return frequency and greater than the natural frequency. The second corrected oil return frequency is preferably set to 58Hz. The rate of up-frequency from the natural frequency to the second corrected oil return frequency can be set to 2Hz/ s. In this way, when the outdoor temperature is relatively mild, the compressor can work at a reasonable frequency in about 8 seconds after starting.

Control the compressor to increase the frequency to the corrected oil return frequency corresponding to the outdoor ambient temperature range. Control the first timer to start timing, and determine whether the timing of the first timer reaches the effective timing duration.

If the timing of the first timer reaches the effective timing duration, it means that the oil return reaches the predetermined set time. The control objective at this time is only to eliminate the temperature difference between the real-time indoor temperature and the target indoor temperature. Therefore, further, when the time count of the first timer reaches the effective time duration, the compressor is controlled to increase the frequency to the target frequency corresponding to the outdoor environment temperature interval according to the determined outdoor environment temperature interval. The effective time duration of the first timer can be set to 45s.

As shown in Figs. 3 and 4, it is a preferred way to control the compressor to increase the frequency to the target frequency corresponding to the outdoor environment temperature interval according to the determined outdoor environment temperature interval.

Specifically, referring to step S300, if the real-time outdoor ambient temperature is within the first outdoor ambient temperature range, as described above, the real-time outdoor ambient temperature is relatively low, so step S302 is executed to control the compressor to return oil from the first calibration The frequency is directly increased to the highest heating setting frequency, that is, the target frequency corresponding to the first outdoor ambient temperature range, so as to give full play to the regulating ability of the compressor and make the room temperature reach the setting temperature in the shortest time. The maximum heating frequency is set according to the capacity of the compressor, which is a preset fixed value, about 100Hz.

Referring to step S400 and step S402, if the real-time outdoor ambient temperature is within the second outdoor ambient temperature range, it is further determined whether the real-time outdoor ambient temperature is less than or equal to the second outdoor ambient temperature threshold. The second outdoor ambient temperature threshold is greater than the first outdoor ambient temperature threshold, which corresponds to a situation where the outdoor ambient temperature is relatively high, and is preferably the minimum value corresponding to the recommended target indoor temperature in the heating mode. In this embodiment, it is set to 18 degrees Celsius. If the real-time outdoor ambient temperature is less than or equal to the second outdoor ambient temperature threshold, it means that in the current outdoor environment, there is still a certain probability that the real-time indoor temperature and the target indoor temperature still have a certain deviation. Therefore, step S406 is executed to control the compressor to return from the second calibration. The oil frequency is increased to the set maximum frequency limit corresponding to the real-time outdoor ambient temperature, that is, a target frequency corresponding to the second outdoor ambient temperature interval, so that the indoor temperature reaches the target indoor temperature as soon as possible. The set maximum frequency limit corresponding to the real-time outdoor ambient temperature can be obtained from a pre-stored data table. The data table restricts the one-to-one correspondence between the outdoor ambient temperature and the set maximum frequency limit, which is the combination of the technical personnel’s air conditioning capabilities, The compressor model and different environmental conditions are obtained through a large number of experiments. The lower the outdoor environment temperature, the higher the set maximum frequency limit.

Referring to step S404, if the real-time outdoor ambient temperature is greater than the second outdoor ambient temperature threshold, it indicates that the current ambient temperature is relatively high, and it is further determined whether the real-time indoor ambient temperature is less than or equal to the indoor ambient temperature threshold. The indoor ambient temperature threshold corresponds to the intermediate value of the recommended target indoor temperature, and in this embodiment, it is set to 20 degrees Celsius. Referring to step S408, if the real-time indoor ambient temperature is less than or equal to the indoor ambient temperature threshold, the compressor is controlled to increase the frequency from the second corrected oil return frequency to the set target frequency. The target frequency is preferably set to 80 Hz, so that the air conditioner can eliminate small temperature deviations in a short time, achieve an ideal control effect, and avoid additional energy consumption.

In the control method disclosed in the foregoing embodiment, the oil return frequency is expected to be corrected based on the current indoor ambient temperature formed based on the real-time outdoor ambient temperature, taking into account the compressor’s oil return requirements and the air conditioner’s basic heating requirements. Through correction and compensation, a more reasonable correction oil return frequency is obtained, which further makes the compressor work according to the target frequency corresponding to different outdoor ambient temperature ranges, and can achieve the purpose of quickly achieving the ideal heating effect in various situations.

If the indoor and outdoor temperatures are high, the compressor lubricating oil will usually maintain an ideal flow state. If comfort is the highest priority control target, in this state, it is preferable to prevent the compressor from increasing the frequency to the oil return platform, so as not to sacrifice the heating capacity when the frequency is increased to the oil return platform and maintained. Therefore, as a preferred embodiment, before determining the outdoor ambient temperature interval where the real-time ambient temperature is located, the following steps are further included:

Determine whether the real-time outdoor ambient temperature is greater than the oil return protection outdoor ambient temperature threshold and whether the real-time indoor ambient temperature is greater than the oil return protection indoor ambient temperature threshold. If the real-time outdoor ambient temperature is greater than the oil-return protection outdoor ambient temperature threshold and the real-time indoor ambient temperature is greater than the oil-return protection indoor ambient temperature threshold, the indoor and outdoor temperatures are both high, and the compressor is controlled to increase its frequency from the natural frequency directly to the real-time outdoor environment Set the highest frequency limit corresponding to the temperature, and use this as the target frequency, without raising the frequency to the oil return platform. Similarly, the set maximum frequency limit frequency corresponding to the real-time outdoor ambient temperature can be obtained from the pre-stored data table. The data table restricts the one-to-one correspondence between the outdoor ambient temperature and the set maximum frequency limit frequency, which is a combination of technical personnel Air conditioning capacity, compressor model and different environmental conditions are obtained through a large number of experiments. Preferably, the outdoor environmental temperature threshold of the oil return protection can be set to 18 degrees Celsius, and the temperature threshold of the oil return protection indoor environment can be set to 20 degrees Celsius.

After the compressor runs at the target frequency, the operating cycle timer starts counting. When the timing duration of the running cycle timer reaches the effective timing duration, the compressor is controlled to run according to the PID algorithm. The duration of the operation cycle timer is preferably 30 minutes.

On the user side, the control method also provides protection against cold wind. Specifically, when the air conditioner is turned on, the air guide plate of the air outlet of the air conditioner is controlled to rotate to the cold wind prevention position, that is, the air is sent upward to prevent the cold wind from blowing directly on the user. During the operation of the air conditioner, continuously determine whether the indoor heat exchanger coil temperature is less than or equal to the first intervention threshold temperature. If the indoor heat exchanger coil temperature is less than or equal to the first intervention threshold temperature, the indoor fan is controlled to be in a shutdown state; If the indoor coil temperature is greater than the first intervention threshold temperature, the indoor fan is controlled to operate at the lowest wind speed. Preferably, the first intervention threshold temperature is 25 degrees Celsius. In the process of cold wind protection and control, it is further continued to determine whether the indoor heat exchanger coil temperature is greater than or equal to the second intervention threshold temperature, if the indoor heat exchanger coil temperature is greater than or equal to the second intervention threshold temperature and the second timer When the timing reaches the effective timing duration, the indoor fan is controlled to run at the set wind speed. That is, when the second intervention threshold temperature reaches the ideal state, the indoor fan is controlled to operate normally. The second intervention threshold temperature is preferably set to 37 degrees Celsius. At the same time, when the indoor heat exchanger coil temperature is greater than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration, the air outlet guide plate is controlled to return to the set position from the cold wind prevention position. The effective time duration of the second timer is preferably set to 10s to avoid miscontrol caused by the temperature fluctuation of the indoor coil.

As an auxiliary control method, when the indoor fan is running, the electric heating device is controlled to turn on until the electric heating shutdown condition is met, and the electric heating device is controlled to turn off. The electric heating shut-off conditions include the indoor coil temperature for 10 seconds or more, or the outdoor ambient temperature is greater than or equal to 0 degrees Celsius, or the indoor ambient temperature is greater than or equal to 24 degrees Celsius, or the compressor discharge temperature reaches the set target discharge temperature , Or the user actively turns off the electric heating.

The invention also discloses an air conditioning equipment, which adopts a control method. For the control method, reference may be made to the detailed description of any one of the foregoing embodiments and the description of the accompanying drawings in the specification, which will not be repeated here. The air conditioning equipment adopting the above control method can achieve the same technical effect.

An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium is stored in a computer program for electronic data exchange, and the computer program causes the air conditioner to perform part or all of the steps of any method described in the above method embodiment.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the above-mentioned units or modules is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one physical space, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, the technical solutions of the foregoing embodiments can still be described. The recorded technical solutions are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

A control method of air conditioning equipment, applied to a heating mode; wherein, the control method of the air conditioning equipment includes the following steps:

When starting, control the compressor to run at the natural frequency, the outdoor fan works at the highest set speed, and the electronic expansion valve opens to the target opening;

Determine the outdoor environment temperature interval where the real-time outdoor environment temperature is located, and control the compressor to increase the frequency to the corrected oil return frequency corresponding to the outdoor environment temperature interval according to the determined outdoor environment temperature interval;

Determine whether the timing of the first timer reaches the effective timing duration;

When the timing of the first timer reaches the effective timing duration, the frequency of the compressor is controlled to increase to a target frequency corresponding to the outdoor environmental temperature interval according to the determined outdoor environmental temperature interval.
The control method of the air conditioning equipment according to claim 1, wherein:

The following steps are performed when determining the outdoor ambient temperature range where the real-time outdoor ambient temperature is located and controlling the compressor to increase the frequency to the corrected oil return frequency corresponding to the outdoor ambient temperature range according to the determined outdoor ambient temperature range:

Determine whether the real-time outdoor ambient temperature is less than or equal to the first outdoor ambient temperature threshold; if the real-time outdoor ambient temperature is less than or equal to the first outdoor ambient temperature threshold, then the real-time outdoor ambient temperature is within the first outdoor ambient temperature range, and the compressor is controlled to increase the frequency to the first outdoor ambient temperature. Correct the oil return frequency; or

Determine whether the real-time outdoor ambient temperature is greater than the first outdoor ambient temperature threshold; if the real-time outdoor ambient temperature is greater than the first outdoor ambient temperature threshold, then the real-time outdoor ambient temperature is in the second outdoor ambient temperature range, and the compressor is controlled to increase the frequency to the second correction level Oil frequency

Wherein, the first corrected oil return frequency is greater than the second corrected oil return frequency.
The control method of air conditioning equipment according to claim 2, wherein:

When the timing of the first timer reaches the effective timing duration, the following steps are executed when the compressor is controlled to increase the frequency to the target frequency corresponding to the outdoor ambient temperature interval according to the determined outdoor environment temperature interval:

If the real-time outdoor environment temperature is in the first outdoor environment temperature range, control the compressor to increase the frequency from the first corrected oil return frequency to the highest heating setting frequency;

If the real-time outdoor ambient temperature is in the second outdoor ambient temperature range, it is determined whether the real-time outdoor ambient temperature is less than or equal to the second outdoor ambient temperature threshold; if the real-time outdoor ambient temperature is less than or equal to the second outdoor ambient temperature threshold, the compressor is controlled from the The second corrected oil return frequency is increased to the set maximum frequency corresponding to the real-time outdoor ambient temperature; if the real-time outdoor ambient temperature is greater than the second outdoor ambient temperature threshold, it is determined whether the real-time indoor ambient temperature is less than or equal to the indoor ambient temperature threshold, if If the real-time indoor environment temperature is less than or equal to the indoor environment temperature threshold, control the compressor to increase the frequency from the second corrected oil return frequency to the set target frequency;

The second outdoor environment temperature threshold is greater than the first outdoor environment temperature threshold.
The control method of air conditioning equipment according to any one of claims 1 to 3, wherein before determining the outdoor ambient temperature interval in which the real-time outdoor ambient temperature is located, the method further comprises the following steps:

Determine whether the real-time outdoor ambient temperature is greater than the oil return protection outdoor ambient temperature threshold and whether the real-time indoor ambient temperature is greater than the oil return protection indoor ambient temperature threshold;

If the real-time outdoor ambient temperature is greater than the oil-return protection outdoor ambient temperature threshold and the real-time indoor ambient temperature is greater than the oil-return protection indoor ambient temperature threshold, control the compressor to increase the frequency from the natural frequency to the set maximum frequency limit corresponding to the real-time outdoor ambient temperature frequency.
The control method of the air conditioning equipment according to claim 4, wherein:

Determine whether the temperature of the indoor heat exchanger coil is less than or equal to the first intervention threshold temperature. If the temperature of the indoor heat exchanger coil is less than or equal to the first intervention threshold temperature, the indoor fan is controlled to stop; if the indoor coil temperature is greater than the first intervention Threshold temperature, the indoor fan is controlled to run at the lowest wind speed.
The control method of the air conditioning equipment according to claim 5, wherein:

Determine whether the temperature of the indoor heat exchanger coil is greater than or equal to the second intervention threshold temperature. If the temperature of the indoor heat exchanger coil is greater than or equal to the second intervention threshold temperature and the second timer reaches the effective time duration, the indoor fan is controlled according to the setting Run at constant wind speed.
The control method of the air conditioning equipment according to claim 6, wherein:

When the indoor heat exchanger coil temperature is greater than or equal to the second intervention threshold temperature and the timing of the second timer reaches the effective timing duration, the air outlet guide plate is controlled to return to the set position from the cold wind prevention position.
The control method of the air conditioning equipment according to claim 7, wherein:

When the indoor fan is running, the electric heating device is controlled to turn on until the electric heating shutdown condition is met, and the electric heating device is controlled to turn off.
The control method of the air conditioning equipment according to claim 8, wherein:

The compressor runs at the target frequency, and the running cycle timer starts timing;

When the timing duration of the running cycle timer reaches the effective timing duration, the compressor is controlled to run according to the PID algorithm.
An air conditioning device, wherein the air conditioning device adopts the control method according to any one of claims 1 to 9.