Control method of air conditioning equipment and air conditioning equipment

Abstract

The present application relates to the field of equipment control, and specifically, to a control method for air-conditioning equipment and air-conditioning equipment, the method comprising obtaining multiple air outlet temperature values; determining a relatively small air outlet temperature value as an overload target analysis value; judging whether the air-conditioning equipment needs overload protection and the overload protection method according to the overload target analysis value; if overload protection is required and the overload protection method is a compressor frequency limiting method, then determining the fluctuation amplitude of multiple air outlet temperature values; and controlling the compressor operating frequency and the refrigerant flow of the electronic expansion valve according to the overload target analysis value and the fluctuation amplitude. Delaying the timing of judging the need for overload protection from the actual timing of the need for overload protection helps to delay the adjustment of the compressor operating frequency, thereby helping to ensure the heating capacity of the air-conditioning equipment, so that the temperature of the environment in which the air-conditioning equipment is located is easy to reach the user's set temperature, and the heating effect of the air-conditioning equipment is ensured.

Description

Technical Field

[0001] The present application relates to the field of equipment control, and in particular, to a control method for air-conditioning equipment and air-conditioning equipment. Background Art

[0002] Air conditioning equipment refers to equipment that can heat airflow to increase its temperature, such as air conditioners. Taking air conditioning as an example, when the air conditioner is heating, the temperature of the indoor heat exchanger is high. When the temperature of the indoor heat exchanger exceeds the preset temperature threshold, the air conditioner is considered to be in an overload state. In the overload state, the reliability of air conditioning components will decrease. Currently, the overload problem is solved by reducing the operating frequency of the compressor. However, the reduction in the operating frequency of the compressor will cause the temperature of the airflow output by the air conditioner to drop, making it impossible for the temperature in the environment where the air conditioner is located to reach the user's set temperature, resulting in a low heating effect and a reduced user experience. Summary of the invention

[0003] The present application provides a control method for air-conditioning equipment and air-conditioning equipment, so as to at least solve the technical problem that poor heating effect leads to reduced user experience.

[0004] According to a first aspect of an embodiment of the present application, a control method for an air-conditioning device is provided, wherein the air-conditioning device is provided with a plurality of temperature sensors for collecting air outlet temperatures at different positions of an air outlet or at different air outlets, and the method comprises:

[0005] Acquire the outlet air temperature values ​​collected by at least two of the temperature sensors to obtain a plurality of outlet air temperature values;

[0006] Comparing the sizes of the multiple air outlet temperature values, and selecting a relatively small air outlet temperature value from the multiple air outlet temperature values ​​as the overload target analysis value; the relatively small air outlet temperature value is smaller than the maximum value of the multiple air outlet temperature values, and greater than or equal to the minimum value of the multiple air outlet temperature values;

[0007] Determine whether the air-conditioning equipment needs to be overload protected and the overload protection method according to the overload target analysis value; the overload protection method includes a compressor frequency limiting method, a compressor frequency reducing method, and a compressor shutdown method;

[0008] If overload protection is required and the overload protection mode is a compressor frequency limiting mode, determining the fluctuation amplitudes of the multiple air outlet temperature values;

[0009] The operating frequency of the compressor and the refrigerant flow rate of the electronic expansion valve are controlled according to the overload target analysis value and the fluctuation amplitude.

[0010] Optionally, the relatively small air outlet temperature value is a minimum value among the multiple air outlet temperature values;

[0011] The determining of the fluctuation ranges of the plurality of air outlet temperature values ​​comprises:

[0012] The fluctuation range of the plurality of air outlet temperature values ​​is determined according to a difference between a maximum value and a minimum value among the plurality of air outlet temperature values.

[0013] Optionally, judging whether the air-conditioning equipment needs to be overload protected and the overload protection method according to the overload target analysis value includes:

[0014] Whether the air-conditioning equipment needs to be overload protected and the overload protection method are determined according to the magnitude relationship between the overload target analysis value and the preset temperature threshold, wherein the temperature threshold includes a load frequency limiting temperature, a load frequency reduction temperature and a load shutdown temperature; the load frequency limiting temperature is lower than the load frequency reduction temperature, and the load frequency reduction temperature is lower than the load shutdown temperature;

[0015] When the overload target analysis value is greater than or equal to the load frequency limiting temperature and less than the load frequency reduction temperature, the overload protection mode is the compressor frequency limiting mode.

[0016] Optionally, when the overload protection mode is the compressor frequency limiting mode,

[0017] The controlling the compressor operating frequency and the electronic expansion valve refrigerant flow rate according to the overload target analysis value and the fluctuation amplitude includes:

[0018] If the overload target analysis value is greater than or equal to the load frequency limit temperature, and the fluctuation amplitude is less than the preset temperature difference threshold, then stop increasing the compressor operating frequency;

[0019] If the overload target analysis value is greater than or equal to the load frequency limit temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is controlled to decrease and the electronic expansion valve refrigerant flow is increased according to the preset flow adjustment parameters.

[0020] Optionally, the method further comprises:

[0021] When the overload target analysis value is less than the load frequency reduction temperature,

[0022] Obtaining a load warning temperature, wherein the load warning temperature is less than the load frequency limit temperature;

[0023] If the overload target analysis value is less than the load warning temperature, and the fluctuation amplitude is less than the preset temperature difference threshold, the compressor operating frequency and the refrigerant flow rate are adjusted according to the preset heating parameters, wherein the heating parameters are the parameters of the air-conditioning equipment during normal heating;

[0024] If the overload target analysis value is less than the load warning temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is adjusted according to the heating parameter and the refrigerant flow of the electronic expansion valve is increased according to the preset flow adjustment parameter;

[0025] If the overload target analysis value is greater than or equal to the load warning temperature but less than the load frequency limit temperature, and the fluctuation amplitude is less than the temperature difference threshold, the compressor operating frequency is controlled to increase and the increasing speed is less than the increasing speed of the compressor operating frequency when the air-conditioning equipment is heating normally;

[0026] If the overload target analysis value is greater than or equal to the load warning temperature but less than the load frequency limit temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is controlled to increase and the increase rate is lower than the increase rate of the compressor operating frequency when the air-conditioning equipment is normally heating, and the refrigerant flow of the electronic expansion valve is increased according to the preset flow adjustment parameters.

[0027] Optionally, after controlling the compressor operating frequency to increase and the increasing speed is lower than the increasing speed of the compressor operating frequency when the air conditioning equipment is normally heating, the method further includes:

[0028] Increasing the speed of the indoor fan of the air conditioner, wherein if the speed of the indoor fan is at the highest level, increasing the speed of the indoor fan according to a preset speed correction value;

[0029] After a preset time threshold, the outlet air temperature value is re-obtained. If the re-obtained outlet air temperature value is still between the load warning temperature and the load frequency limit temperature, the speed of the indoor fan is increased again according to the speed correction value and the number of times the speed is increased is accumulated;

[0030] If the accumulated number of times reaches a preset number threshold or the accumulated increased rotation speed reaches a rotation speed threshold, the rotation speed is stopped from being increased and the indoor fan is operated at the current rotation speed.

[0031] Optionally, increasing the refrigerant flow of the electronic expansion valve according to a preset flow adjustment parameter includes:

[0032] The opening of the electronic expansion valve on the refrigerant flow path is increased according to the flow adjustment parameters.

[0033] Optionally, after increasing the opening of the electronic expansion valve on the refrigerant flow path according to the flow adjustment parameter, the method further includes:

[0034] Re-acquire multiple air outlet temperature values ​​and determine the minimum value and the maximum temperature difference value among the multiple air outlet temperature values ​​re-acquired to obtain a minimum verification temperature value and a maximum verification temperature difference value;

[0035] If the minimum verification temperature value is less than the overload target analysis value, calculating the difference between the overload target analysis value and the minimum verification temperature value to obtain a verification difference;

[0036] If the verification difference exceeds a preset difference threshold, adjusting the opening of the electronic expansion valve to the previous opening;

[0037] If the minimum verification temperature value is greater than or equal to the overload target analysis value, or if the verification difference does not exceed the difference threshold, then determine whether the maximum verification temperature difference value is between the fluctuation amplitude and the temperature difference threshold. If so, increase the opening of the electronic expansion valve again according to the flow regulation parameter to iteratively determine the minimum verification temperature value and the maximum verification temperature difference value, until the iteratively determined maximum verification temperature difference value is less than the temperature difference threshold, and stop increasing the opening of the electronic expansion valve.

[0038] Optionally, the method further comprises:

[0039] When the overload target analysis value is greater than or equal to the load frequency reduction temperature and less than the load shutdown temperature, the overload protection mode is the compressor frequency reduction mode;

[0040] Wherein, the compressor frequency reduction method includes controlling the compressor operating frequency to decrease;

[0041] When the load target analysis value is greater than or equal to the load shutdown temperature, the overload protection mode is the compressor shutdown mode;

[0042] The compressor shutdown method includes controlling the operating frequency of the compressor to decrease until the compressor stops.

[0043] According to a second aspect of an embodiment of the present application, an air-conditioning device is provided, wherein the air-conditioning device is provided with a plurality of temperature sensors for collecting air outlet temperatures at different positions of the air outlet or at different air outlets, and the air-conditioning device adopts the control method of the above-mentioned air-conditioning device.

[0044] Optionally, the air conditioning equipment includes an air conditioner.

[0045] In the embodiment of the present application, on the one hand, the overload target analysis value used to determine whether the air-conditioning equipment needs overload protection is the outlet air temperature at the outlet position, rather than the temperature of the indoor heat exchanger, so that the timing of determining the need for overload protection is delayed from the actual timing of the need for overload protection, which helps to delay the adjustment of the compressor operating frequency, thereby helping to ensure the heating capacity of the air-conditioning equipment, so that the temperature of the environment in which the air-conditioning equipment is located is easy to reach the user's set temperature, ensuring the heating effect of the air-conditioning equipment and improving the user experience. On the other hand, in addition to adjusting the compressor operating frequency, the refrigerant flow rate of the electronic expansion valve is also adjusted. The change in the refrigerant flow rate of the electronic expansion valve will affect the uniformity of the air flow temperature output by the air-conditioning equipment, which helps to improve the uniformity of the air flow temperature output by the air-conditioning equipment, improve the heating effect and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 The present invention is a flow chart of a method for controlling an air conditioning device in an embodiment.

[0047] Figure 2 is another flow chart of a method for controlling an air conditioning device in an embodiment.

[0048] Figure 3 It is a schematic diagram of the structure of an air conditioning device in an embodiment.

[0049] Marking instructions: 1. Upper air outlet; 11. Upper temperature sensor; 2. Middle air outlet; 22. Middle temperature sensor; 3. Lower air outlet; 33. Lower temperature sensor. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0052] According to an embodiment of the present application, an embodiment of a control method for air-conditioning equipment is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0053] When the air conditioner is operating in heating mode under low temperature conditions, in order to ensure the long-term reliability of the air conditioner, when the whole machine is operating under overload conditions, that is, when the temperature of the indoor heat exchanger coil rises to the preset overload pipe temperature, the overload protection problem is often solved by limiting the increase of the compressor operating frequency or reducing the compressor operating frequency. This can easily lead to a reduction in heating capacity due to overload frequency reduction when the indoor ambient temperature has not yet reached the set temperature of the air conditioner, affecting the user's comfort experience.

[0054] The embodiment of the present application provides a control method for air conditioning equipment, which can be applied to air conditioning, by setting multiple temperature sensors on the air outlet side of the air conditioner to detect the air outlet temperature of the indoor unit of the air conditioner. When the air conditioner is in heating operation, the temperature sensor that detects the lowest air outlet temperature is used as a condition for judging whether to enter the overload protection action, which can delay entering the overload protection mode and improve the heating capacity. At the same time, the temperature difference between the air outlet temperatures is compared. If the temperature difference is ≥ the preset temperature difference, the indoor air outlet temperature difference is reduced by adjusting the air conditioner operation parameters to improve the uniformity of the heating air outlet temperature.

[0055] Among them, the indoor heat exchanger coil is a heat exchange device used in HVAC systems. In the air handling system, it is a type of fin-tube heat exchanger, mainly used for condensation and evaporation heat exchange processes in air conditioning. The coil is mainly composed of tubes and fins. A tube-fin gap is formed between the fins and the tubes. The air passes through the gap between the fins and the tubes to achieve heat exchange. In an application scenario, the indoor heat exchanger coil temperature can also be understood as the indoor heat exchanger temperature. A temperature sensor is arranged on the bend of the indoor heat exchanger to detect the indoor heat exchanger temperature.

[0056] It should be noted that the indoor heat exchanger temperature or the indoor heat exchanger coil temperature is the temperature that directly reflects whether the air conditioner is overloaded. The air outlet temperature of the air conditioner indoor unit indicates the air flow temperature at the air outlet. Since the air flow from the indoor heat exchanger to the air outlet will consume heat, the air outlet temperature will be lower than the indoor heat exchanger temperature, that is, the air outlet temperature will be lower than the indoor heat exchanger coil temperature. In this way, using the air outlet temperature to judge whether the air conditioner is overloaded will produce a delay effect, making it difficult for the air conditioner to immediately limit or reduce the compressor operating frequency when the indoor heat exchanger or the indoor heat exchanger coil is just overloaded. This helps to improve the heating capacity and heating effect of the air conditioner, meet user needs, and improve user experience.

[0057] In order to facilitate further understanding of the control method provided in this embodiment, Figure 1 As shown, the method is applied to air conditioning equipment, and the air conditioning equipment is provided with multiple temperature sensors for collecting the air outlet temperatures at different positions or different air outlets. The method comprises:

[0058] S101. Acquire air outlet temperature values ​​collected by at least two temperature sensors to obtain a plurality of air outlet temperature values.

[0059] That is, the multiple outlet air temperature values ​​at least include outlet air temperature values ​​collected by two different temperature sensors. That is, the multiple outlet air temperature values ​​at least include two outlet air temperature values. In some embodiments, the number of the multiple outlet air temperature values ​​may be equal to or less than the number of temperature sensors. For example, three temperature sensors A, B, and C are provided. When obtaining the outlet air temperature value, the values ​​collected by A and C are obtained respectively, and the outlet air temperature value a and the outlet air temperature value b are obtained.

[0060] It should be noted that multiple air outlet temperature values ​​cannot all be collected by the same temperature sensor.

[0061] S102: Compare the multiple air outlet temperature values, and select a relatively smaller air outlet temperature value from the multiple air outlet temperature values ​​as an overload target analysis value.

[0062] The relatively small air outlet temperature value is smaller than the maximum value among the multiple air outlet temperature values, and greater than or equal to the minimum value among the multiple air outlet temperature values.

[0063] The overload target analysis value refers to a value used to determine whether the air-conditioning equipment is in an overload state, which may be one of multiple air outlet temperature values ​​or a value calculated from multiple air outlet temperature values.

[0064] S103: Determine whether the air-conditioning equipment needs to be protected from overload and the overload protection method according to the overload target analysis value.

[0065] The overload protection mode includes a compressor frequency limiting mode, a compressor frequency reducing mode, and a compressor stopping mode.

[0066] Since the overload target analysis value is the outlet air temperature of the air conditioner, it is possible to determine whether the air conditioner is in an overheated state through this value. If it is in an overheated state, it proves that the air conditioner is overloaded. Therefore, it is possible to determine whether overload protection is required and further determine the overload protection method.

[0067] The overload protection method refers to a means to solve or reduce the problem of overload of the air-conditioning equipment. For example, the overload protection method is to control the air-conditioning equipment to shut down, so that the temperature of the air-conditioning equipment drops and the overload state is eliminated.

[0068] S104: If overload protection is required and the overload protection mode is a compressor frequency limiting mode, determine the fluctuation amplitudes of the multiple air outlet temperature values.

[0069] In one embodiment, the overload protection method includes a compressor frequency limiting method, wherein the compressor frequency limiting method refers to a method of limiting the operating frequency of the compressor.

[0070] The fluctuation amplitude refers to the degree of difference between multiple outlet air temperature values. Specifically, the fluctuation amplitude can be determined by calculating the difference between multiple outlet air temperature values. The fluctuation amplitude can reflect the temperature difference of the air temperature, and it is convenient to determine whether the outlet air temperature of the air conditioner is uniform according to the temperature difference. For example, when the fluctuation amplitude is large, it indicates that the outlet air temperature is uneven, otherwise it indicates that the outlet air temperature is uniform.

[0071] Preferably, the fluctuation amplitude of multiple air outlet temperature values ​​refers to the maximum difference between multiple air outlet temperature values. Specifically, the difference between any two air outlet temperature values ​​among the multiple air outlet temperature values ​​can be calculated to obtain multiple differences, and the maximum difference is taken as the fluctuation amplitude. For example, the multiple air outlet temperature values ​​include 62 degrees Celsius collected by temperature sensor A, 63 set degrees collected by temperature sensor B, and 64.5 set degrees collected by temperature sensor C. Using 62-63=-1, taking the absolute value to obtain the first temperature difference value of 1, using 62-64.5=-2.5, taking the absolute value to obtain the second temperature difference value of 2.5, using 63-64.5=-1.5, taking the absolute value to obtain the third temperature difference value of 1.5. Comparing the sizes of 1, 2.5 and 1.5 again, the fluctuation amplitude is 2.5.

[0072] S105. Controlling the compressor operating frequency and the refrigerant flow rate of the electronic expansion valve according to the overload target analysis value and the fluctuation amplitude.

[0073] It should be noted that, taking air conditioning as an example, changes in the operating frequency of the compressor will affect the temperature of the air conditioning equipment, thereby affecting the outlet air temperature value. Specifically, when the operating frequency of the compressor decreases, the temperature of the air conditioning equipment will also decrease, and the outlet air temperature value will decrease accordingly; when the operating frequency of the compressor increases, the temperature of the air conditioning equipment will also increase, and the outlet air temperature value will increase accordingly. Therefore, if overload protection is required, the temperature of the air conditioning equipment can be reduced by limiting the increase in the operating frequency of the compressor or reducing the operating frequency of the compressor, so that the air conditioning equipment can be restored to the load state of the normal load, that is, out of the overload state. Changes in the refrigerant flow rate will affect the uniformity of the outlet air temperature. Specifically, when the outlet air temperature uniformity is poor, the refrigerant flow rate can be increased so that the airflow in different outlets can fully exchange heat with the heat exchanger, and the temperature difference of the airflow is reduced. On the contrary, if the refrigerant flow rate is reduced, it is easy to cause the outlet air temperature uniformity to deteriorate, and increase the difference between multiple outlet air temperature values.

[0074] In other words, the refrigerant flow rate will only be adjusted when the compressor frequency limiting method is used. If other overload protection methods are used, the refrigerant flow rate will no longer be adjusted, and only the compressor operating frequency will be adjusted. The main reason is that when the compressor operating frequency is reduced or even the compressor is controlled to shut down, the reduction in the compressor operating frequency will cause the heating capacity of the air-conditioning equipment to deteriorate. If the refrigerant flow rate is adjusted at this time to improve the uniformity of the outlet air temperature, the heating capacity of the air-conditioning equipment will be further deteriorated, reducing the user experience. Specifically, the deterioration of the heating capacity is manifested in, for example, a decrease in the outlet air temperature and a slower increase in the efficiency of the indoor ambient temperature.

[0075] Through the above content, on the one hand, the overload target analysis value used to determine whether the air-conditioning equipment needs overload protection is the outlet air temperature at the outlet position, rather than the temperature of the indoor heat exchanger, so that the timing of judging the need for overload protection is delayed from the actual timing of the need for overload protection, which helps to delay the adjustment of the compressor operating frequency, thereby helping to ensure the heating capacity of the air-conditioning equipment, so that the temperature of the environment in which the air-conditioning equipment is located is easy to reach the user's set temperature, ensuring the heating effect of the air-conditioning equipment and improving the user experience. On the other hand, in addition to adjusting the compressor operating frequency, the refrigerant flow of the electronic expansion valve is also adjusted. The change in the refrigerant flow of the electronic expansion valve will affect the uniformity of the air flow temperature output by the air-conditioning equipment, which helps to improve the uniformity of the air flow temperature output by the air-conditioning equipment, improve the heating effect and user experience.

[0076] In another embodiment of the present application, the relatively small air outlet temperature value is the minimum value among the multiple air outlet temperature values;

[0077] The determining of the fluctuation ranges of the plurality of air outlet temperature values ​​comprises:

[0078] The fluctuation range of the plurality of air outlet temperature values ​​is determined according to a difference between a maximum value and a minimum value among the plurality of air outlet temperature values.

[0079] In another embodiment of the present application, judging whether the air-conditioning equipment needs to be overload protected and the overload protection method according to the overload target analysis value includes:

[0080] Whether the air-conditioning equipment needs to be overload protected and the overload protection method are determined according to the magnitude relationship between the overload target analysis value and the preset temperature threshold, wherein the temperature threshold includes a load frequency limiting temperature, a load frequency reduction temperature and a load shutdown temperature; the load frequency limiting temperature is lower than the load frequency reduction temperature, and the load frequency reduction temperature is lower than the load shutdown temperature;

[0081] When the overload target analysis value is greater than or equal to the load frequency limiting temperature and less than the load frequency reduction temperature, the overload protection mode is the compressor frequency limiting mode.

[0082] A temperature threshold is preset, which is used to determine whether the air-conditioning equipment is overloaded and the degree of overload. Different overload programs correspond to different load protection methods. Therefore, after obtaining the overload target analysis value and the temperature threshold, the overload condition of the air-conditioning equipment can be determined by comparing the sizes.

[0083] Among them, the load frequency limit temperature plays a role in limiting the increase in the compressor operating frequency. That is to say, when the outlet air temperature reaches the load frequency limit temperature, it is necessary to limit the increase in the compressor operating frequency. Specifically, the compressor operating frequency can be kept unchanged. The load frequency reduction temperature plays a role in reducing the compressor operating frequency. That is to say, when the outlet air temperature reaches the load frequency reduction temperature, it is necessary to reduce the compressor operating frequency, rather than simply limiting the increase in the compressor operating frequency. The load shutdown temperature plays a role in controlling the compressor shutdown. That is to say, when the outlet air temperature reaches the load shutdown temperature, it is difficult to adjust the load state of the air-conditioning equipment to normal load by reducing the compressor operating frequency. At this time, it is necessary to control the compressor shutdown, that is, to make the compressor operating frequency zero, so as to adjust the load state of the air-conditioning equipment to normal load.

[0084] Preferably, in one embodiment, the load frequency limiting temperature is, for example, 60 degrees Celsius, the load frequency reduction temperature is, for example, 64 degrees Celsius, and the load shutdown temperature is, for example, 66 degrees Celsius.

[0085] Among them, the compressor frequency limiting mode refers to a protection mode that keeps the operating frequency of the compressor unchanged.

[0086] Through the above content, the load protection mode of the air-conditioning equipment is distinguished by using the preset temperature threshold, which helps to adopt different overload protection modes for different overload states of the air-conditioning equipment and improve the control effect of the air-conditioning equipment.

[0087] In another embodiment of the present application, when the overload protection mode is the compressor frequency limiting mode,

[0088] like Figure 2 As shown, the control of the compressor operating frequency and the electronic expansion valve refrigerant flow rate according to the overload target analysis value and the fluctuation amplitude includes:

[0089] If the overload target analysis value is greater than or equal to the load frequency limit temperature, and the fluctuation amplitude is less than the preset temperature difference threshold, then stop increasing the compressor operating frequency;

[0090] If the overload target analysis value is greater than or equal to the load frequency limit temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is controlled to decrease and the electronic expansion valve refrigerant flow is increased according to the preset flow adjustment parameters.

[0091] That is to say, when the air-conditioning equipment is in normal heating operation, the operating frequency of the compressor will be gradually increased. When the air-conditioning equipment is overloaded by using the compressor frequency limiting method, the increase in the operating frequency of the compressor is stopped and the fluctuation amplitude, that is, the uniformity of the air output, is considered at the same time. This helps to ensure the heating effect of the air-conditioning while protecting the air-conditioning equipment.

[0092] In another embodiment of the present application, Figure 2 As shown, the method also includes:

[0093] When the overload target analysis value is less than the load frequency reduction temperature,

[0094] Obtaining a load warning temperature, wherein the load warning temperature is less than the load frequency limit temperature;

[0095] If the overload target analysis value is less than the load warning temperature, and the fluctuation amplitude is less than the temperature difference threshold, the compressor operating frequency and the refrigerant flow rate are adjusted according to the preset heating parameters, wherein the heating parameters are the parameters of the air-conditioning equipment during normal heating;

[0096] If the overload target analysis value is less than the load warning temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is adjusted according to the heating parameter and the refrigerant flow of the electronic expansion valve is increased according to the preset flow adjustment parameter;

[0097] If the overload target analysis value is greater than or equal to the load warning temperature but less than the load frequency limit temperature, and the fluctuation amplitude is less than the temperature difference threshold, the compressor operating frequency is controlled to increase and the increasing speed is less than the increasing speed of the compressor operating frequency when the air-conditioning equipment is heating normally;

[0098] If the overload target analysis value is greater than or equal to the load warning temperature but less than the load frequency limit temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is controlled to increase and the increase rate is lower than the increase rate of the compressor operating frequency when the air-conditioning equipment is normally heating, and the refrigerant flow of the electronic expansion valve is increased according to the preset flow adjustment parameters.

[0099] Preferably, the load warning temperature plays a warning role, that is, it is used to determine whether the overload target analysis value is close to the load frequency limit temperature. Specifically, when the overload target analysis value is greater than the load warning temperature, it can be determined that the overload target analysis value is close to or close to the load frequency limit temperature. At this time, the compressor operating frequency can be intervened in advance, so that the time node when the air-conditioning equipment enters the overload state is later or it will not enter the overload state.

[0100] Preferably, the load warning temperature is, for example, 55 degrees Celsius, 54 degrees Celsius, or 53 degrees Celsius.

[0101] Among them, when the air conditioner is heating normally, the compressor operating frequency will increase at a certain speed, which can be the default speed set when the air conditioner leaves the factory, or the speed set by the user. For ease of understanding, the increase speed of the compressor operating frequency during normal heating is replaced by V1. V1 can be a variable value or a fixed value, and this embodiment does not specifically limit this.

[0102] When the overload target analysis value is greater than or equal to the load warning temperature but less than the load frequency limit temperature, the compressor operating frequency can be controlled to increase according to a preset increase speed V2, and V2 is less than V1.

[0103] Preferably, V2 increases by n Hz per second or by 1 Hz every a seconds, for example, n can be 1, 2, 5, ..., a can be 30, 40, 50, ..., and this embodiment does not make any specific limitation to this.

[0104] Preferably, the heating parameters may include the compressor operating frequency during normal heating, the increasing speed V1 of the compressor operating frequency during normal heating, and the refrigerant flow rate.

[0105] The flow rate adjustment parameter refers to a parameter set to increase the refrigerant flow rate, and the parameter does not belong to the heating parameter used during normal heating.

[0106] Through the above content, by setting the load warning temperature, the adjustment of the compressor operating frequency is intervened in advance before the air-conditioning equipment is overloaded, so that the air-conditioning equipment can delay entering the overload state, thereby delaying the triggering of the overload protection action, which is beneficial for the air-conditioning equipment to increase the indoor temperature to the user's set temperature, thereby improving the heating effect of the air-conditioning equipment and user experience.

[0107] In another embodiment of the present application, the method further comprises:

[0108] The difference between the load frequency limit temperature and the preset frequency limit temperature correction value is determined to obtain the load warning temperature, wherein the frequency limit temperature correction value is less than the load frequency limit temperature, and the load warning temperature is less than the load frequency limit temperature.

[0109] The frequency limiting temperature correction value is, for example, 5 degrees Celsius, 6 degrees Celsius, 7 degrees Celsius, etc., which is not specifically limited in this embodiment. The load warning temperature can be obtained by subtracting the frequency limiting temperature correction value from the load frequency limiting temperature. For example, 60-5=55 degrees Celsius, where the load frequency limiting temperature=60 degrees Celsius, the frequency limiting temperature correction value=5 degrees Celsius, and the load warning temperature=55 degrees Celsius.

[0110] In another embodiment of the present application, after controlling the compressor operating frequency to increase and the increasing speed is less than the increasing speed of the compressor operating frequency when the air-conditioning equipment is normally heating, the method further includes:

[0111] The speed of the indoor fan of the air-conditioning equipment is increased, wherein if the speed of the indoor fan is at the highest level, the speed of the indoor fan is increased according to a preset speed correction value.

[0112] Specifically, the windshield speed during normal heating is a fixed value, but when the overload target analysis value reaches ≥ the load warning temperature, the speed correction control is triggered. At this time, the speed can be a variable value to correct and compensate the current speed.

[0113] Preferably, the speed correction value R can be 10, 20, 30, etc., which is not specifically limited in this embodiment.

[0114] After the preset time threshold, the outlet air temperature value is obtained again. If the re-obtained outlet air temperature value is still between the load warning temperature and the load frequency limit temperature, the speed of the indoor fan is increased again according to the speed correction value and the number of speed increases is accumulated;

[0115] If the accumulated number of times reaches the preset number threshold or the accumulated increased speed reaches the speed threshold, the speed increase is stopped and the indoor fan is operated at the current speed.

[0116] That is to say, each time the speed is increased, the outlet air temperature value is re-acquired and the threshold interval of the outlet air temperature value is determined. If the outlet air temperature value is between the load warning temperature and the load frequency limit temperature, the speed is increased again until the number of speed increases reaches the number threshold or the speed increases to the speed threshold. If the re-acquired outlet air temperature value is not between the load warning temperature and the load frequency limit temperature during the speed increase, the speed increase can be stopped and the indoor fan can be operated at the current speed.

[0117] Through the above content, when controlling the increase speed of the compressor operating frequency, the speed of the indoor fan is also increased synchronously. The increase in the indoor fan speed is beneficial to increase the air outlet temperature and air outlet speed, thereby raising the indoor temperature to the user's set temperature more quickly, meeting user needs and improving user experience.

[0118] In another embodiment of the present application, increasing the refrigerant flow rate according to a preset flow adjustment parameter includes:

[0119] Increase the opening of the electronic expansion valve on the refrigerant flow path according to the flow adjustment parameters.

[0120] Among them, an electronic expansion valve is arranged on the refrigerant flow path, and the larger the opening of the electronic expansion valve is, the greater the refrigerant flow rate is.

[0121] Preferably, the flow rate regulation parameter includes k, so that when the opening is increased according to the flow rate regulation parameter, the opening is increased by k steps each time, and k can take integer values ​​of 10, 20, 30, etc.

[0122] Through the above content, the refrigerant flow rate is adjusted by controlling the opening of the electronic expansion valve, which is simple and quick.

[0123] In another embodiment of the present application, after increasing the opening of the electronic expansion valve on the refrigerant flow path according to the flow adjustment parameter, the method further includes:

[0124] Re-acquire multiple air outlet temperature values ​​and determine the minimum value and the maximum temperature difference value among the multiple air outlet temperature values ​​re-acquired to obtain a minimum verification temperature value and a maximum verification temperature difference value;

[0125] If the minimum verification temperature value is less than the overload target analysis value, the difference between the overload target analysis value and the minimum verification temperature value is calculated to obtain the verification difference;

[0126] If the verification difference exceeds the preset difference threshold, the opening of the electronic expansion valve is adjusted to the last opening;

[0127] If the minimum verification temperature value is greater than or equal to the overload target analysis value, or if the verification difference does not exceed the difference threshold, then determine whether the maximum verification temperature difference value is between the fluctuation amplitude and the temperature difference threshold. If so, increase the opening of the electronic expansion valve again according to the flow adjustment parameter to iteratively determine the minimum verification temperature value and the maximum verification temperature difference value until the iteratively determined maximum verification temperature difference value is less than the temperature difference threshold, and stop increasing the opening of the electronic expansion valve.

[0128] That is to say, after adjusting the opening, run for m seconds (m can be 30, 40, 50... etc.), then re-acquire multiple air outlet temperature values, and judge whether the air outlet temperature becomes more uniform and whether the uniformity meets the standard based on the re-acquired multiple air outlet temperature values. If it meets the standard, the opening will no longer be increased. If it does not meet the standard, the opening will continue to be increased to iteratively control the opening.

[0129] Through the above content, after adjusting the opening of the electronic expansion valve, the uniformity of the outlet air temperature is checked by re-obtaining multiple outlet air temperature values, and the outlet air temperature is made uniform by using an iterative control method, which helps to improve the user experience.

[0130] In another embodiment of the present application, the method further comprises:

[0131] When the overload target analysis value is greater than or equal to the load frequency reduction temperature and less than the load shutdown temperature, the overload protection mode is the compressor frequency reduction mode;

[0132] Wherein, the compressor frequency reduction method includes controlling the compressor operating frequency to decrease;

[0133] When the load target analysis value is greater than or equal to the load shutdown temperature, the overload protection mode is the compressor shutdown mode;

[0134] The compressor shutdown method includes controlling the operating frequency of the compressor to decrease until the compressor stops.

[0135] Through the above content, when the overload target analysis value is greater than or equal to the load frequency reduction temperature, the compressor operating frequency is either controlled to decrease, or the compressor operating frequency is controlled to decrease until the compressor stops, thereby protecting the air-conditioning equipment.

[0136] For ease of understanding, an air conditioner is taken as an example of air conditioning equipment.

[0137] During the heating operation of the air conditioner, the indoor heat exchanger undergoes continuous condensation and heat exchange, and the internal temperature of the indoor unit gradually rises. When the internal temperature of the indoor unit rises to a certain level, the whole machine reaches an overload state. Long-term overload operation will affect the reliability of the components of the whole machine. In order to ensure the long-term reliability of the whole machine, the existing technical solution uses the coil temperature of the indoor heat exchanger as the judgment condition for entering the overload protection. When the pipe temperature reaches the preset overload pipe temperature, it is judged to enter the overload protection state. At this time, the program will limit the frequency increase or control the frequency decrease to reduce the internal temperature of the indoor unit until the pipe temperature is lower than the preset overload protection temperature and then exit the overload protection action. The disadvantage of this technical solution is that when the indoor ambient temperature has not reached the air conditioner set temperature, the heating overload protection pipe temperature is reached, triggering the frequency limit or frequency reduction, resulting in a decrease in heating capacity, affecting the user's comfort experience.

[0138] In order to solve the above-mentioned air conditioning heating problem, the present invention sets a plurality of temperature sensors on the air outlet side, and uses one of the detected relatively lowest air outlet temperature as the judgment condition for entering the overload protection, thereby extending the time for entering the heating overload limit frequency reduction protection. The air conditioner indoor unit of the present invention is evenly provided with three temperature sensors, upper, middle and lower, on the air outlet side to detect the indoor air outlet temperature. During heating operation, the air outlet temperatures of the upper, middle and lower air outlets are obtained, and the relatively lowest air outlet temperature is selected as the judgment condition for entering the overload protection. When it is detected that the indoor air outlet temperature is ≥ the preset overload frequency reduction temperature T1 (which can be an integer value of 60°C), the compressor frequency is controlled to maintain the status quo and not continue to increase the frequency. When it is detected that the indoor air outlet temperature is ≥ the preset overload frequency reduction temperature T2 (which can be an integer value of 64°C), the compressor frequency is controlled to decrease. When the indoor air outlet temperature is detected to be ≥ the preset overload shutdown temperature T3 (which can be an integer value of 66°C), the air conditioner is controlled to shut down. Among them, the preset overload frequency limit temperature T1 < the preset overload frequency reduction temperature T2 < the preset overload shutdown temperature T3.

[0139] Synchronously, the maximum temperature difference between the upper, middle and lower air outlet temperatures is obtained. When the maximum air outlet temperature difference △T1 is greater than the preset temperature difference T4 (which can be an integer value of 8°C, 9°C, 10°C, ...), it indicates that the air outlet temperature of the air conditioner is uneven, and the uneven air outlet problem can be improved by adjusting the refrigerant flow rate. At this time, the opening of the electronic expansion valve can be controlled to increase by n steps (n can be an integer value of 10, 20, ...), and the maximum temperature difference △T2 can be obtained again after running for m seconds (m can be an integer value of 30, 40, 50, ...). If the maximum temperature difference △T2 is less than the first obtained temperature difference △T1 and greater than the preset temperature difference T4, the opening of the electronic expansion valve can be controlled to increase by n steps (n can be an integer value of 10, 20, ...) until the maximum air outlet temperature difference △T is less than the preset temperature difference T4. However, if during the period of increasing the opening of the electronic expansion valve, it is detected that the air outlet temperature is significantly lower than the previous detected temperature by T5℃ (T5 can be an integer value of 3, 4, 5, ...), it means that the heating capacity has decreased. Stop increasing the opening and restore it to the previous opening.

[0140] When the air conditioner is in stable heating operation, when the outlet air temperature is detected to be ≥ the preset overload frequency limit temperature T1, and the maximum outlet air temperature difference is ≤ the preset temperature difference, the overload protection action is entered, and the frequency is controlled to stop increasing until the outlet air temperature continues to rise to the preset overload frequency reduction temperature T2, and then the frequency is controlled to decrease until the outlet air temperature is < the preset overload frequency limit temperature T1; if the maximum outlet air temperature difference is > the preset temperature difference, in addition to entering the overload protection action as mentioned above, the opening of the electronic expansion valve needs to be increased by n steps to improve the uneven air outlet problem, and the outlet air temperature is obtained again after running for m seconds. If the outlet air temperature is obviously T5℃ lower than the previous detected temperature, the opening is stopped from increasing and restored to the previous opening.

[0141] When the preset overload frequency limit temperature T1-t1 is detected ≤ outlet temperature < preset overload frequency limit temperature T1 (t1 is the frequency limit temperature correction value, taking an integer of 5℃, 6℃, 7℃, ...), and the maximum outlet temperature difference ≤ the preset temperature difference, in order to delay the overload protection action, the compressor operating frequency can be controlled to increase by 1Hz per a second (a can be 30, 40, 50, ...), and the indoor fan speed can be increased to enhance heat exchange. If the indoor fan speed is already at the highest level, the control is increased by R speed (R can be 10, 20, 30, ...) on this basis. After running for m seconds, the outlet temperature is obtained again. If the outlet temperature is still > the preset overload frequency limit temperature, If the outlet air temperature is still greater than the preset overload frequency limit temperature T1-t1, the speed of the indoor fan is increased by R steps again. This cycle is repeated b times (b can be an integer of 3, 4, 5, ...). If the outlet air temperature is still greater than the preset overload frequency limit temperature T1-t1, the speed increase is stopped and the fan is operated at the existing speed to avoid excessive temperature rise caused by excessive indoor fan speed, which affects the reliability of components. If the maximum outlet air temperature difference is greater than the preset temperature difference, in addition to the above-mentioned delayed overload protection action, the opening of the electronic expansion valve needs to be increased by n steps to improve the uneven air outlet. After running for m seconds, the outlet air temperature is obtained again. If the outlet air temperature is obviously lower than the previous detected temperature by T5℃, the opening is stopped from being increased and restored to the previous opening.

[0142] When the detected air outlet temperature is less than the preset overload frequency limiting temperature T1-t1, and the maximum air outlet temperature difference is less than or equal to the preset temperature difference, each system parameter operates normally for heating according to the program settings; if the maximum air outlet temperature difference is greater than the preset temperature difference, under the condition that other system parameters operate normally according to the program settings, the opening of the electronic expansion valve needs to be increased by n steps to improve the uneven air outlet problem, and the air outlet temperature is obtained again after running for m seconds. If the air outlet temperature is obviously T5℃ lower than the previous detected temperature, stop increasing the opening and restore it to the previous opening.

[0143] An embodiment of the present application also provides an air-conditioning device, which is provided with multiple temperature sensors for collecting air outlet temperatures at different positions of the air outlet or at different air outlets, and the air-conditioning device adopts the control method of the above-mentioned air-conditioning device.

[0144] Preferably, if Figure 2 As shown, the air outlet includes an upper air outlet 1 , a middle air outlet 2 and a lower air outlet 3 , and the temperature sensors include an upper temperature sensor 11 arranged at the upper air outlet 1 , a middle temperature sensor 22 arranged at the middle air outlet 2 and a lower temperature sensor 33 arranged at the lower air outlet 3 .

[0145] Optionally, the air conditioning device includes an air conditioner.

[0146] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0147] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0148] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0149] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0150] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0151] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.

[0152] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling an air conditioning device, characterized in that: The air conditioning device is provided with a plurality of temperature sensors for collecting the air outlet temperatures at different positions of the air outlet or at different air outlets, and the method comprises: Acquire the outlet air temperature values ​​collected by at least two of the temperature sensors to obtain a plurality of outlet air temperature values; Comparing the sizes of the multiple air outlet temperature values, and selecting a relatively small air outlet temperature value from the multiple air outlet temperature values ​​as the overload target analysis value; the relatively small air outlet temperature value is smaller than the maximum value of the multiple air outlet temperature values, and greater than or equal to the minimum value of the multiple air outlet temperature values; Determine whether the air-conditioning equipment needs to be overload protected and the overload protection method according to the overload target analysis value; the overload protection method includes a compressor frequency limiting method, a compressor frequency reducing method, and a compressor shutdown method; If overload protection is required and the overload protection mode is a compressor frequency limiting mode, determining the fluctuation amplitudes of the multiple air outlet temperature values; The operating frequency of the compressor and the refrigerant flow rate of the electronic expansion valve are controlled according to the overload target analysis value and the fluctuation amplitude.

2. The control method of the air conditioning equipment according to claim 1, characterized in that: The relatively small air outlet temperature value is the minimum value among the multiple air outlet temperature values; The determining of the fluctuation ranges of the plurality of air outlet temperature values ​​comprises: The fluctuation range of the plurality of air outlet temperature values ​​is determined according to a difference between a maximum value and a minimum value among the plurality of air outlet temperature values.

3. The control method of the air conditioning equipment according to claim 2, characterized in that: The determining whether the air conditioning equipment needs to be overload protected and the overload protection method according to the overload target analysis value includes: Whether the air-conditioning equipment needs to be overload protected and the overload protection method are determined according to the magnitude relationship between the overload target analysis value and the preset temperature threshold, wherein the temperature threshold includes a load frequency limiting temperature, a load frequency reduction temperature and a load shutdown temperature; the load frequency limiting temperature is lower than the load frequency reduction temperature, and the load frequency reduction temperature is lower than the load shutdown temperature; Among them, when the overload target analysis value is greater than or equal to the load frequency limiting temperature and less than the load frequency reduction temperature, the overload protection mode is the compressor frequency limiting mode.

4. The control method of the air conditioning equipment according to claim 3, characterized in that: When the overload protection mode is the compressor frequency limiting mode, The controlling the compressor operating frequency and the electronic expansion valve refrigerant flow rate according to the overload target analysis value and the fluctuation amplitude includes: If the overload target analysis value is greater than or equal to the load frequency limit temperature, and the fluctuation amplitude is less than the preset temperature difference threshold, then stop increasing the compressor operating frequency; If the overload target analysis value is greater than or equal to the load frequency limit temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is controlled to decrease and the electronic expansion valve refrigerant flow is increased according to the preset flow adjustment parameters.

5. The control method of the air conditioning equipment according to claim 3, characterized in that: The method further comprises: When the overload target analysis value is less than the load frequency reduction temperature, Obtaining a load warning temperature, wherein the load warning temperature is less than the load frequency limit temperature; If the overload target analysis value is less than the load warning temperature, and the fluctuation amplitude is less than the preset temperature difference threshold, the compressor operating frequency and the refrigerant flow rate are adjusted according to the preset heating parameters, wherein the heating parameters are the parameters of the air-conditioning equipment during normal heating; If the overload target analysis value is less than the load warning temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is adjusted according to the heating parameter and the refrigerant flow of the electronic expansion valve is increased according to the preset flow adjustment parameter; If the overload target analysis value is greater than or equal to the load warning temperature but less than the load frequency limit temperature, and the fluctuation amplitude is less than the temperature difference threshold, the compressor operating frequency is controlled to increase and the increasing speed is less than the increasing speed of the compressor operating frequency when the air-conditioning equipment is heating normally; If the overload target analysis value is greater than or equal to the load warning temperature but less than the load frequency limit temperature, and the fluctuation amplitude is greater than or equal to the temperature difference threshold, the compressor operating frequency is controlled to increase and the increase rate is lower than the increase rate of the compressor operating frequency when the air-conditioning equipment is normally heating, and the refrigerant flow of the electronic expansion valve is increased according to the preset flow adjustment parameters.

6. The control method of the air conditioning equipment according to claim 5, characterized in that: After controlling the compressor operating frequency to increase and the increasing speed is lower than the increasing speed of the compressor operating frequency when the air conditioning equipment is normally heating, the method further includes: Increasing the speed of the indoor fan of the air conditioner, wherein if the speed of the indoor fan is at the highest level, increasing the speed of the indoor fan according to a preset speed correction value; After a preset time threshold, the outlet air temperature value is re-obtained. If the re-obtained outlet air temperature value is still between the load warning temperature and the load frequency limit temperature, the speed of the indoor fan is increased again according to the speed correction value and the number of times the speed is increased is accumulated; If the accumulated number of times reaches a preset number threshold or the accumulated increased rotational speed reaches a rotational speed threshold, the rotational speed is stopped from being increased and the indoor fan is operated at the current rotational speed.

7. The control method of the air conditioning equipment according to claim 4 or 5, characterized in that: Increasing the refrigerant flow of the electronic expansion valve according to the preset flow adjustment parameters includes: The opening of the electronic expansion valve on the refrigerant flow path is increased according to the flow adjustment parameters.

8. The control method of the air conditioning equipment according to claim 7, characterized in that: After increasing the opening of the electronic expansion valve on the refrigerant flow path according to the flow adjustment parameter, the method further includes: Re-acquire multiple air outlet temperature values ​​and determine the minimum value and the maximum temperature difference value among the multiple air outlet temperature values ​​re-acquired to obtain a minimum verification temperature value and a maximum verification temperature difference value; If the minimum verification temperature value is less than the overload target analysis value, calculating the difference between the overload target analysis value and the minimum verification temperature value to obtain a verification difference; If the verification difference exceeds a preset difference threshold, adjusting the opening of the electronic expansion valve to the previous opening; If the minimum verification temperature value is greater than or equal to the overload target analysis value, or if the verification difference does not exceed the difference threshold, then determine whether the maximum verification temperature difference value is between the fluctuation amplitude and the temperature difference threshold. If so, increase the opening of the electronic expansion valve again according to the flow regulation parameter to iteratively determine the minimum verification temperature value and the maximum verification temperature difference value, until the iteratively determined maximum verification temperature difference value is less than the temperature difference threshold, and stop increasing the opening of the electronic expansion valve.

9. The control method of the air conditioning equipment according to claim 3, characterized in that: The method further comprises: When the overload target analysis value is greater than or equal to the load frequency reduction temperature and less than the load shutdown temperature, the overload protection mode is the compressor frequency reduction mode; Wherein, the compressor frequency reduction method includes controlling the compressor operating frequency to decrease; When the load target analysis value is greater than or equal to the load shutdown temperature, the overload protection mode is the compressor shutdown mode; The compressor shutdown method includes controlling the operating frequency of the compressor to decrease until the compressor stops.

10. An air conditioning device, characterized in that: The air conditioning equipment is provided with a plurality of temperature sensors for collecting air outlet temperatures at different positions of the air outlet or at different air outlets. The air conditioning equipment adopts the control method for the air conditioning equipment according to any one of claims 1 to 9.

11. The air conditioning device according to claim 10, characterized in that: The air conditioning device includes an air conditioner.

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