Auxiliary heating control method and air conditioning system

Abstract

The application provides an auxiliary heating control method and an air conditioning system, comprising: acquiring an outdoor environment temperature during heating operation; when the outdoor environment temperature T Wj is lower than a preset temperature T 预设 , starting auxiliary heating; after the auxiliary heating is started, judging to enter different auxiliary heating power determination procedures according to a current indoor unit air volume; when a real-time rotating speed N1 of the indoor unit is less than or equal to a threshold value, entering a power determination procedure whether the power is too low; when the real-time rotating speed N1 of the indoor unit is greater than the threshold value, entering a power determination procedure whether the power is too high. Through automatic identification of the temperature, the outdoor environment temperature can be accurately acquired, the deviation from the actual environment temperature is reduced, and the auxiliary heating is ensured to be started in time. Meanwhile, the higher the air volume is, the higher the auxiliary heating power is, the power of the auxiliary heating is controlled through the air volume of the indoor unit, different air volume adjustment amplitudes are controlled according to different temperatures, different auxiliary heating powers are matched in different environments, the energy consumption is avoided to be too large, the energy saving and environmental protection effect is achieved, and the user use comfort is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and in particular, relates to a supplementary heating control method and an air conditioning system. BACKGROUND

[0002] At present, the supplementary heating of central air conditioners consumes a lot of energy and has poor comfort, and the existing technology cannot be intelligently controlled to be turned on. Most users use supplementary heating in two aspects: one is to directly control by a remote controller, and the other is to automatically turn on by the air conditioner according to the outdoor coil temperature, the outdoor environment temperature and the like. According to the new national standard, the supplementary heating cannot be automatically turned on when the outdoor environment temperature is above 0℃, but the outdoor coil temperature and the outdoor environment temperature are monitored by a temperature sensing bulb of the unit, and the temperature monitored by the temperature sensing bulb deviates from the actual environment temperature, which may cause the supplementary heating to be not turned on in time, resulting in poor user experience. Moreover, the existing technology lacks control of the supplementary heating power, and the supplementary heating is turned on at full load, which ignores that different supplementary heating powers are required at different environment temperatures, causing excessive energy consumption, affecting user comfort. SUMMARY

[0003] Therefore, the present application aims to provide a supplementary heating control method and an air conditioning system to solve the problems of the existing technology, such as the supplementary heating being not turned on in time, the lack of control of the supplementary heating power, and excessive energy consumption.

[0004] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0005] A supplementary heating control method, comprising:

[0006] acquiring an outdoor environment temperature when heating is performed;

[0007] when the outdoor environment temperature T Wj is lower than a preset temperature T 预设 , turning on the supplementary heating;

[0008] after the supplementary heating is turned on, determining different supplementary heating power determination procedures according to a current indoor unit air volume; when a real-time speed N1 of the indoor unit is less than or equal to a threshold value, entering a power determination procedure of whether the power is too low; when the real-time speed N1 of the indoor unit is greater than the threshold value, entering a power determination procedure of whether the power is too high. Through automatic identification of the temperature, the outdoor environment temperature can be accurately acquired, the deviation from the actual environment temperature is reduced, and the supplementary heating is ensured to be turned on in time. Meanwhile, the higher the air volume is, the higher the supplementary heating power is, the power of the supplementary heating is controlled by the air volume of the indoor unit, and different air volume adjustment amplitudes are controlled according to different temperatures, so that different environment temperatures are matched with different supplementary heating powers, the excessive energy consumption is avoided, the energy saving and environmental protection are achieved, and the user comfort is improved.

[0009] Further, after entering the power too low determination procedure, the real-time speed of the indoor unit is increased according to the temperature difference ΔT between the outlet air temperature and the return air temperature; after entering the power too high determination procedure, the real-time speed of the indoor unit is decreased according to the temperature difference ΔT between the outlet air temperature and the return air temperature. After entering the indoor air volume control, the higher the air volume is, the higher the electric auxiliary heating power is, so the automatic matching adjustment of the electric auxiliary heating power can be realized by controlling the air volume.

[0010] Further, when T1≤T Wj <T 预设 , the real-time speed N1 of the indoor unit is less than or equal to the first speed threshold, the power too low determination procedure is entered; when the real-time speed N1 of the indoor unit is greater than the first speed threshold, the power too high determination procedure is entered;

[0011] When T2≤T Wj <T1, the real-time speed N1 of the indoor unit is less than or equal to the second speed threshold, the power too low determination is entered; when the real-time speed N1 of the indoor unit is greater than the second speed threshold, the power too high determination is entered;

[0012] When T Wj <T2, the real-time speed N1 of the indoor unit is less than or equal to the third speed threshold, the power too low determination is entered; when the real-time speed N1 of the indoor unit is greater than the third speed threshold, the power too high determination is entered;

[0013] The first speed threshold < the second speed threshold < the third speed threshold. When the real-time speed N1 of the indoor unit is less than or equal to the speed threshold, it is indicated that there is a possibility of power too low, and the specific determination process needs to be entered to determine whether the power is too low. When the real-time speed N1 of the indoor unit is greater than the speed threshold, it is indicated that there is a possibility of power too high, and the specific determination process needs to be entered to determine whether the power is too high.

[0014] Further, the first speed threshold is set as N 极限 +R1, N 极限 is the minimum indoor unit speed for preventing high temperature protection of the inner disc temperature, R1 is the first adjustment speed; the second speed threshold is set as N 极限 +R2, R2 is the second adjustment speed; and the third speed threshold is N 极限 +R3, R3 is the third adjustment speed, and R1 < R2 < R3. The greater the adjustment speed is, the faster the air volume can be reacted, and then the electric auxiliary heating power can be quickly adjusted. For example, when the outdoor environment temperature is low, the indoor outlet air temperature can be quickly adjusted by speed adjustment to improve user comfort. On the other hand, when the outdoor environment temperature is low, the influence of the indoor fan speed on the electric auxiliary heating power is small, and the adjustment range of the indoor fan speed needs to be appropriately increased.

[0015] Further, when T1≤T Wj <T 预设When the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is not more than the second preset difference T B , the indoor unit real-time rotating speed N1 is increased by R1; and the power over-high determination procedure is that when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is greater than or equal to the first preset difference T A , the indoor unit real-time rotating speed N1 is decreased by R1.

[0016] Further, when T2≤T Wj <T1, the power over-low determination procedure is that when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is not more than the second preset difference T B , the indoor unit real-time rotating speed N1 is increased by R2; and the power over-high determination procedure is that when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is greater than or equal to the first preset difference T A , the indoor unit real-time rotating speed N1 is decreased by R2.

[0017] Further, when T Wj <T2, the power over-low determination procedure is that when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is not more than the second preset difference T B , the indoor unit real-time rotating speed N1 is increased by R3; and the power over-high determination procedure is that when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is greater than or equal to the first preset difference T A , the indoor unit real-time rotating speed N1 is decreased by R3.

[0018] Further, T A is set to 16-18℃, and T B is set to 12-16℃.

[0019] Further, the outdoor environment temperature is acquired by a sensor and / or networked acquisition.

[0020] Compared with the prior art, the auxiliary heating control method has the following advantages:

[0021] Through automatic identification of temperature, the outdoor environment temperature can be accurately obtained, deviation from the actual environment temperature is reduced, and auxiliary heating is ensured to be turned on in time. Meanwhile, the higher the air volume is, the higher the electric auxiliary heating power is. The air volume of the indoor unit is used to control the power of the auxiliary heating, and different air volume adjustment ranges are controlled according to different temperatures, so that different environment matching different auxiliary heating powers are realized, overlarge energy consumption is avoided, energy saving and environmental protection are achieved, and user use comfort is improved.

[0022] The application further provides an air conditioning system comprising the auxiliary heating control method.

[0023] The air conditioning system has the same advantages as the auxiliary heating control method relative to the prior art, and details are not repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The auxiliary heating control method flowchart is described in the embodiments of the application. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application are described in detail below with reference to the drawings.

[0026] As shown in the figure, an auxiliary heating control method comprises the following steps:

[0027] S100, heating operation, obtaining outdoor environment temperature

[0028] The outdoor environment temperature is obtained by a sensor and / or networked. The outdoor environment temperature is obtained every predetermined time, and the outdoor environment temperature is continuously updated.

[0029] Specifically, when the outdoor environment temperature is obtained by a sensor, the sensor can be set as an infrared emitter and an infrared receiver. The infrared emitter and the infrared receiver are both arranged on the outdoor unit. The outdoor environment temperature is obtained every first preset time t1, each time of emission and reception lasts for a set time Δt, the average temperature obtained in the set time Δt in the recording area is recorded, and the average temperature is stored in a storage system as a system memory value T Wj . The test value T W of each latest outdoor environment temperature is compared with the system memory value T Wj . When the temperature difference between the test value T W and the system memory value T Wj is greater than data a, or the test value T W and the system memory value T Wj are on both sides of 0℃, the system memory value T Wj is updated, that is, the current test value T W is taken as the latest system memory value, and only the outdoor environment temperature is taken as the system memory value.

[0030] Further, a takes the value of 2-4℃. Preferably, a takes the value of 3℃. The system memory value is updated in the temperature interval, reducing the calculation load of the controller. The setting time Δt is set to 0.5-2min, preferably, Δt is set to 1min.

[0031] Further, the first preset time t1 can be changed according to different regions, different times, different weather conditions (such as sudden severe weather), and different climate regions. Preferably, the first preset time t1 is set to 1h in the region with stable temperature change.

[0032] When the outdoor environment temperature is obtained through networking, a signal is sent to the acquisition module every second preset time t2, the newly obtained local temperature is taken as the latest data of the outdoor environment temperature, the temperature fluctuation obtained multiple times is recorded, and when the temperature fluctuation is greater than the data a, or the temperatures before and after the fluctuation are on both sides of 0℃, the time and temperature of the current fluctuation point are recorded, and the current temperature is taken as the outdoor environment temperature T Wj .

[0033] Further, the second preset time t2 can be changed according to different regions, different times, different weather conditions (such as sudden severe weather), and different climate regions. Preferably, the second preset time t2 is set to 4h in the region with stable temperature change.

[0034] As a preferred embodiment of the present application, for the region with rapid temperature change, two acquisition methods can be used simultaneously to obtain the outdoor environment temperature, and the actual situation can be adjusted and set. For example, an outdoor environment temperature obtained by the sensor is first taken as the memory value, and then the weather forecast in a period of time is obtained by networking. If the weather changes, the first preset time t1 and the setting time Δt of the outdoor sensor for obtaining the outdoor environment temperature are adjusted. For example, if the weather changes, the first preset time is shortened, and the setting time Δt is prolonged, so as to fully ensure the accuracy of the obtained outdoor environment temperature.

[0035] S200, controlling the opening and closing of the auxiliary heating according to the outdoor environment temperature;

[0036] The step S200 includes:

[0037] S210, when the outdoor environment temperature T Wj is not less than the preset temperature T 预设 , the auxiliary heating is turned off. When the outdoor environment temperature is above the preset temperature T 预设 , it means that the environment temperature is not too low, and the heating capacity of the unit is sufficient, so the auxiliary heating does not need to be turned on, which fully saves energy and reduces consumption.

[0038] S220, when the outdoor ambient temperature T Wj is lower than the preset temperature T 预设 , the auxiliary heating is turned on. When the outdoor ambient temperature is lower than the preset temperature T 预设 , it indicates that the ambient temperature is low, and the auxiliary heating needs to be turned on to relieve the heating pressure of the unit and improve the comfort.

[0039] Further, the preset temperature T 预设 is set to -2-2°C, and preferably, the preset temperature T 预设 is set to 0°C.

[0040] S300, after the auxiliary heating is turned on, the indoor unit air volume control is entered, and different auxiliary heating power determination programs are entered according to the current indoor unit air volume. When the indoor unit real-time speed N1 is less than or equal to the threshold value, the power is too low determination program is entered, and when the indoor unit real-time speed N1 is greater than the threshold value, the power is too high determination program is entered.

[0041] After entering the power is too low determination program, the indoor unit real-time speed is increased according to the temperature difference ΔT between the outlet air temperature and the return air temperature; and after entering the power is too high determination program, the indoor unit real-time speed is decreased according to the temperature difference ΔT between the outlet air temperature and the return air temperature.

[0042] Further, after entering the indoor unit air volume control, the higher the air volume, the higher the auxiliary heating power. Therefore, the automatic matching adjustment of the auxiliary heating power can be realized by controlling the air volume.

[0043] Further, the entering of different auxiliary heating power determination programs according to the current indoor unit air volume further comprises:

[0044] S310, when T1≤T Wj <T 预设 , the indoor unit real-time speed N1 is less than or equal to the first speed threshold value, the power is too low determination program is entered; and when the indoor unit real-time speed N1 is greater than the first speed threshold value, the power is too high determination program is entered.

[0045] Wherein, T1 is the first temperature threshold value, which is designed as input during development according to the unit capacity margin, or can be set by professional personnel after sale according to local climate, room selection, and use environment. Generally, when the unit is selected appropriately, the first temperature threshold value T1 is set to -3-4°C, and preferably, the first temperature threshold value T1 is set to -3°C. The first speed threshold value is set to N 极限 +R1, and N 极限 is the minimum indoor unit speed to prevent high temperature protection of the inner disc temperature, which is taken into account during the development of the unit. Preferably, N 极限 is generally 50% of the rated speed of the motor; and R1 is the first adjustment speed, which is taken into account during the development of the unit, and is generally recommended to be set to 20-40 r / min, and preferably, the first adjustment speed R1 is set to 30 r / min.

[0046] When the real-time rotation speed N1 of the indoor unit is less than or equal to N 极限 +R1, it indicates that the power is possibly too low, and a specific determination process needs to be entered to determine whether the power is too low. When the real-time rotation speed N1 of the indoor unit is greater than N 极限 +R1, it indicates that the power is possibly too high, and a specific determination process needs to be entered to determine whether the power is too high.

[0047] In the embodiment, the determination process of whether the power is too low is as follows: within the third preset time t3, whether the real-time rotation speed N1 of the indoor unit is increased is controlled according to the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 .

[0048] Further, within the third preset time t3, when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is not more than the second preset difference T B , the real-time rotation speed N1 of the indoor unit is increased by R1, and the detection of ΔT and N1 is continued and the determination is repeated; within the third preset time t3, when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is greater than the second preset difference T B , the real-time rotation speed N1 of the indoor unit does not need to be adjusted, the detection of ΔT and N1 is continued and the determination is repeated. In this way, the rotation speed is repeatedly increased or decreased, and the auxiliary heating power is timely adjusted according to the temperature. Specifically, when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is not more than the second preset difference T B within the third preset time t3, it indicates that the indoor heating capacity is insufficient, the outlet air temperature T 出 is low, and the rotation speed of the indoor fan needs to be further increased, so as to increase the auxiliary heating power, increase the outlet air temperature, and improve the user comfort; when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is greater than the second preset difference T B within the third preset time t3, it indicates that the indoor heating capacity is sufficient, the outlet air temperature T 出 is high, and the rotation speed of the indoor fan does not need to be increased, that is, the auxiliary heating power does not need to be increased, so as to ensure the user comfort while saving energy and reducing consumption.

[0049] In the embodiment, the determination process of whether the power is too high is as follows: within the third preset time t3, whether the real-time rotation speed N1 of the indoor unit is decreased is controlled according to the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 .

[0050] Further, within the third preset time t3, the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is greater than or equal to the first preset difference T A , the indoor unit real-time speed N1 is reduced by R1, and the detection of ΔT and N1 is continued, and the cycle determination is performed; within the third preset time t3, the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is less than the first preset difference T A , the power over-low determination procedure is entered, and the cycle determination is performed. The purpose of cyclically reducing or increasing the speed is achieved, and the timely adjustment of the auxiliary heating power according to the temperature is achieved. Specifically, within the third preset time t3, when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is greater than or equal to the first preset difference T A , it indicates that the outlet air temperature is high, and in order to ensure the comfort of indoor users and save energy, the indoor unit real-time speed N1 needs to be reduced; within the third preset time t3, when the temperature difference ΔT between the outlet air temperature T 出 and the return air temperature T 回 is less than the first preset difference T A , it indicates that the outlet air temperature is low, and the power over-low determination needs to be entered, and whether the indoor unit real-time speed N1 needs to be increased is further determined according to the power.

[0051] S320, when T2≤T Wj <T1, the indoor unit real-time speed N1 is less than or equal to the second speed threshold, the power over-low determination is entered; and when the indoor unit real-time speed N1 is greater than the second speed threshold, the power over-high determination is entered.

[0052] Wherein, T2 is the second temperature threshold, which is designed to be input according to the capacity margin of the unit during development, or can be set by a professional person after sale according to the local climate, room selection, and use environment. Generally, when the unit is properly selected, the second temperature threshold T2 is set to -5 to -8℃, and preferably, the second temperature threshold T2 is set to -6℃. The second speed threshold is set to N 极限 +R2, N 极限 is the minimum indoor unit speed for preventing high-temperature protection of the inner disc temperature, which is taken into account during the development of the unit, and preferably, N 极限 is generally 50% of the rated speed of the motor; and R2 is the second adjustment speed, which is taken into account during the development of the unit, and generally is recommended to be set to 40-60r / min, and preferably, the second adjustment speed R2 is set to 50r / min.

[0053] When the indoor unit real-time speed N1>N 极限 +R2, it indicates that there may be a power over-high condition, and the specific determination process needs to be entered to determine whether the power is over-high. When the indoor unit real-time speed N1≤N极限 R2, it indicates that there may be a case of power being too low, and a specific determination process needs to be entered to determine whether the power is too low.

[0054] In the embodiment, the power being too low determination procedure is that, within the third preset time t3, according to the temperature difference value AT between the outlet air temperature T 出 and the return air temperature T 回 , it is controlled whether to increase the real-time speed N1 of the indoor unit.

[0055] Further, within the third preset time t3, the temperature difference value AT between the outlet air temperature T 出 and the return air temperature T 回 does not exceed the second preset difference value T B , the real-time speed N1 of the indoor unit is increased by R2, and the AT and N1 are continuously detected and determined in a cycle; within the third preset time t3, the temperature difference value AT between the outlet air temperature T 出 and the return air temperature T 回 is greater than the second preset difference value T B , the real-time speed N1 of the indoor unit does not need to be adjusted, and the AT and N1 are continuously detected and determined in a cycle. The purpose of cyclically increasing or decreasing the speed is achieved, and the auxiliary heating power is timely adjusted according to the temperature. Specifically, when the temperature difference value AT between the outlet air temperature T 出 and the return air temperature T 回 does not exceed the second preset difference value T B within the third preset time t3, it indicates that the indoor heating capacity is insufficient, the outlet air temperature T 出 is low, and the indoor fan speed needs to be further increased, and the electric auxiliary heating power needs to be increased to increase the outlet air temperature and improve the user comfort; when the temperature difference value AT between the outlet air temperature T 出 and the return air temperature T 回 is greater than the second preset difference value T B within the third preset time t3, it indicates that the indoor heating capacity is sufficient, the outlet air temperature T 出 is high, and the indoor fan speed does not need to be increased, that is, the electric auxiliary heating power does not need to be increased, which ensures the user comfort while saving energy and reducing consumption.

[0056] In the embodiment, the power being too high determination procedure is that, within the third preset time t3, according to the temperature difference value AT between the outlet air temperature T 出 and the return air temperature T 回 , it is controlled whether to decrease the real-time speed N1 of the indoor unit.

[0057] Further, within the third preset time t3, the temperature difference value AT between the outlet air temperature T 出 and the return air temperature T 回 is greater than or equal to the first preset difference value T A, the indoor unit real-time speed N1 is reduced by R2, the detection of AT and N1 is continued, and the cycle determination is performed; when the temperature difference AT between the outlet air temperature T 出 and the return air temperature T 回 is less than the first preset difference T A , the power over-low determination procedure is entered, and the cycle determination is performed. The purpose of cycle reduction or increase of the speed is achieved, and the timely adjustment of the auxiliary heating power according to the temperature is achieved. Specifically, when the temperature difference AT between the outlet air temperature T 出 and the return air temperature T 回 is greater than or equal to the first preset difference T A , it is indicated that the outlet air temperature is high, and the indoor unit real-time speed N1 needs to be reduced to ensure the comfort of the indoor user and energy saving. When the temperature difference AT between the outlet air temperature T 出 and the return air temperature T 回 is less than the first preset difference T A , it is indicated that the outlet air temperature is low, and the power over-low determination is entered, and whether the indoor unit real-time speed N1 needs to be increased is further determined according to the power.

[0058] S330, when T Wj <T2, the indoor unit real-time speed N1 is less than or equal to the third speed threshold, the power over-low determination is entered, and the power over-high determination is entered when the indoor unit real-time speed N1 is greater than the third speed threshold.

[0059] The third speed threshold is N 极限 +R3, T2 and N 极限 are the same as in step S320. R3 is the third adjustment speed, which is counted when the unit is developed. It is generally recommended to be set to 60-70 r / min, and preferably, the third adjustment speed R3 is set to 70 r / min.

[0060] When the indoor unit real-time speed N1>N 极限 +R3, it is indicated that the power over-high condition may exist, and the specific determination process needs to be entered to determine whether the power is over-high. When the indoor unit real-time speed N1≤N 极限 +R3, it is indicated that the power over-low condition may exist, and the specific determination process needs to be entered to determine whether the power is over-low.

[0061] In the embodiment, the power over-low determination procedure is that: within the third preset time t3, whether the indoor unit real-time speed N1 is increased is controlled according to the temperature difference AT between the outlet air temperature T 出 and the return air temperature T 回 .

[0062] Further, within the third preset time t3, whether the indoor unit real-time speed N1 is increased is controlled according to the temperature difference AT between the outlet air temperature T 出 and the return air temperature T回 The temperature difference ΔT does not exceed the second preset difference T B At that time, the indoor unit's real-time speed N1 increases by R3, and ΔT and N1 are continuously monitored and cyclically determined; within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT is greater than the second preset difference T. B At this time, there is no need to adjust the real-time indoor unit speed N1; instead, ΔT and N1 are continuously monitored and cyclically determined. This achieves the purpose of cyclically increasing or decreasing the speed, thereby enabling timely adjustment of auxiliary heating power based on temperature. Specifically, when the outlet air temperature T reaches a certain value within the third preset time t3, the system will continuously monitor ΔT and N1. 出 With return air temperature T 回 The temperature difference ΔT does not exceed the second preset difference T B When the temperature T is high, it indicates that the indoor heating capacity is insufficient and the outlet air temperature is low. 出 The temperature is too low, so the internal fan speed needs to be increased to improve the electric auxiliary heating power, thereby increasing the outlet air temperature and improving user comfort; when the outlet air temperature T is within the third preset time t3, 出 With return air temperature T 回 The temperature difference ΔT is greater than the second preset difference T. B When the temperature is high enough, it indicates that the indoor heating capacity is sufficient and the outlet air temperature T is within acceptable limits. 出 The speed is relatively high, so there is no need to increase the internal fan speed, which means there is no need to increase the electric auxiliary heating power. This ensures user comfort while saving energy and reducing consumption.

[0063] In this embodiment, the procedure for determining whether the power is too high is as follows: within a third preset time t3, based on the outlet air temperature T 出 With return air temperature T 回 The temperature difference value ΔT controls whether to reduce the real-time speed N1 of the indoor unit.

[0064] Furthermore, within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT is greater than or equal to the first preset difference T. A At that time, the indoor unit's real-time speed N1 decreases by R3, and ΔT and N1 are continuously monitored and cyclically determined; within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT is less than the first preset difference T A When the power is too low, a cyclical judgment process is initiated. This aims to cyclically reduce or increase the rotational speed, thereby achieving timely adjustment of the auxiliary heating power based on temperature. Specifically, within the third preset time t3, when the outlet air temperature T... 出 With return air temperature T 回 The temperature difference ΔT is greater than or equal to the first preset difference T. AWhen the air outlet temperature is high, it indicates that the indoor unit's real-time speed N1 needs to be reduced to ensure indoor user comfort and energy conservation. When the air outlet temperature T reaches the third preset time t3, it indicates that the air outlet temperature is high. 出 With return air temperature T 回 The temperature difference ΔT is less than the first preset difference T A If the air outlet temperature is low, it indicates that the power is too low and it is necessary to determine whether the power is too low. Further determination based on the power indicates whether the real-time speed N1 of the indoor unit needs to be increased.

[0065] In this embodiment, R1 < R2 < R3. The lower the outdoor ambient temperature, the higher the adjustment speed of the indoor fan. On the one hand, a higher adjustment speed allows for a faster airflow response, thereby quickly adjusting the electric auxiliary heating power. For example, when the outdoor ambient temperature is low, the indoor air outlet temperature can be quickly adjusted by adjusting the speed to improve user comfort. On the other hand, when the outdoor ambient temperature is low, the impact of the indoor fan speed on the electric auxiliary heating power becomes smaller, requiring an appropriate increase in the adjustment range of the indoor fan speed.

[0066] Furthermore, the first preset difference T A The difference T between the second preset value B These are the upper and lower limits of the recommended temperature difference range for the indoor unit's outlet and return air temperatures, respectively, T. A Set to 16-18℃, preferably, T A Set to 17℃; T B Set to 12-16℃, preferred, preferred, T B Set to 13℃.

[0067] Furthermore, the third preset time t3 is set to 10-20s, with the preferred setting being 20s, to prevent excessively rapid changes and fully ensure the accuracy of temperature difference acquisition.

[0068] The auxiliary heating control method provided by this invention can accurately obtain the outdoor ambient temperature through automatic temperature recognition, reducing the deviation from the actual ambient temperature and ensuring timely activation of the auxiliary heating. Simultaneously, the higher the airflow, the higher the electric auxiliary heating power. The power of the auxiliary heating is controlled by the indoor unit's airflow, and different airflow adjustment ranges are controlled according to different temperatures. This allows for matching different auxiliary heating power to different environments, avoiding excessive energy consumption, achieving energy saving and environmental protection, and improving user comfort.

[0069] As part of an embodiment of the present invention, an air conditioning system is also provided, comprising an indoor unit and an outdoor unit. An indoor fan is installed inside the indoor unit, and a sensor for acquiring the outdoor ambient temperature is installed on the outdoor unit. The air conditioning system is capable of executing the auxiliary heating control method described above.

[0070] Although the present application has been disclosed with reference to the above embodiments, the application is not limited to the above embodiments. It will be apparent to those skilled in the art that various modifications and changes can be made thereto without departing from the spirit and scope of the application. The scope of the application should be limited only by the appended claims.

Claims

1. An auxiliary heating control method, characterized in that, include: The outdoor ambient temperature is obtained during heating operation; outdoor ambient temperature T Wj Below the preset temperature T 预设 At this time, turn on the auxiliary heating; After auxiliary heating is activated, the system enters different auxiliary heating power determination programs based on the current indoor unit airflow; when T1≤T Wj <T 预设 When the real-time speed N1 of the indoor unit is less than or equal to the first speed threshold, the system enters the power low determination procedure; when the real-time speed N1 of the indoor unit is greater than the first speed threshold, the system enters the power high determination procedure. In T2≤T Wj When the indoor unit's real-time speed N1 is less than or equal to the second speed threshold, the system enters the power low-power determination procedure; when the indoor unit's real-time speed N1 is greater than the second speed threshold, the system enters the power high-power determination procedure. In T Wj <T2, when the real-time indoor unit speed N1 is less than or equal to the third speed threshold, the power is entered into the low power determination procedure; when the real-time indoor unit speed N1 is greater than the third speed threshold, the power is entered into the high power determination procedure. Wherein, the first speed threshold < the second speed threshold < the third speed threshold; After entering the low power determination program, the indoor unit's real-time speed is controlled based on the temperature difference ΔT between the outlet air temperature and the return air temperature; after entering the high power determination program, the indoor unit's real-time speed is controlled based on the temperature difference ΔT between the outlet air temperature and the return air temperature.

2. The auxiliary heating control method according to claim 1, characterized in that, The first speed threshold is set to N 极限 +R1, N 极限 To achieve the minimum indoor unit speed required to protect the inner panel temperature from high temperatures, R1 is the first adjustment speed; the second speed threshold is set to N. 极限 +R2, where R2 is the second adjustment speed; the third speed threshold is N. 极限 +R3, where R3 is the third adjustable speed, and R1 < R2 < R3.

3. The auxiliary heating control method according to claim 1, characterized in that, In T1≤T Wj <T 预设 The procedure for determining whether the power is too low is as follows: within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT does not exceed the second preset difference T B At that time, the indoor unit's real-time speed N1 increases by R1; the power over-limit determination procedure is as follows: within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT is greater than or equal to the first preset difference T. A At that time, the real-time speed N1 of the indoor unit decreases by R1.

4. The auxiliary heating control method according to claim 1, characterized in that, In T2≤T Wj When the power is less than T1, the procedure for determining whether the power is too low is as follows: within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT does not exceed the second preset difference T B At that time, the indoor unit's real-time speed N1 increases by R2; the power over-limit determination procedure is as follows: within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT is greater than or equal to the first preset difference T. A At that time, the real-time speed N1 of the indoor unit decreases by R2.

5. The auxiliary heating control method according to claim 1, characterized in that, In T Wj When the power is less than T2, the procedure for determining whether the power is too low is as follows: within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT does not exceed the second preset difference T B At that time, the indoor unit's real-time speed N1 increases by R3; the power over-limit determination procedure is as follows: within the third preset time t3, the outlet air temperature T 出 With return air temperature T 回 The temperature difference ΔT is greater than or equal to the first preset difference T. A At that time, the real-time speed N1 of the indoor unit decreases by R3.

6. The auxiliary heating control method according to claim 3, 4, or 5, characterized in that, T A Set to 16~18℃, T B Set to 12~16℃.

7. The auxiliary heating control method according to claim 1, characterized in that, Outdoor ambient temperature is acquired via sensors and / or network connection.

8. An air conditioning system, characterized in that, The air conditioning system is capable of performing the auxiliary heating control method according to any one of claims 1 to 7, wherein the air conditioning system includes an indoor unit and an outdoor unit, an indoor fan is installed inside the indoor unit, and a sensor for acquiring the outdoor ambient temperature is installed on the outdoor unit.

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