Air conditioner and fresh air heating control method thereof

Abstract

The invention discloses an air conditioner and a fresh air heating control method for the air conditioner. The air conditioner comprises: a casing; a heat exchanger; a fan; a fresh air module; a fresh air heating module; an outdoor temperature sensor; an outdoor humidity sensor; a fresh air duct inner wall temperature sensor; and a controller. The controller is configured to: when the air conditioner is turned on and the fresh air module starts to work, determine whether the temperature difference between the outdoor dew point temperature and the indoor part inner wall of the fresh air duct is greater than zero. When the temperature difference between the outdoor dew point temperature and the indoor part inner wall of the fresh air duct is greater than zero, control the operation state of the fresh air heating module according to the temperature difference between the outdoor dew point temperature and the indoor part inner wall of the fresh air duct and the gear position of the fresh air module. Thus, the controller can control the operation state of the fresh air heating module according to the temperature difference between the outdoor dew point temperature and the indoor part inner wall of the fresh air duct and the gear position of the fresh air module, so that the controller can control the fresh air heating module more accurately and reliably, and improve the anti-condensation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner and a fresh air heating control method of the air conditioner. Background Art

[0002] The air conditioner is equipped with a fresh air module, which can introduce outdoor fresh air into the room and complete the air exchange between indoor and outdoor, thereby purifying the indoor air, improving the indoor air quality, and increasing the indoor air oxygen content, ensuring the comfort of indoor users.

[0003] In the related technology, in the process of introducing outdoor fresh air into the room, the outdoor fresh air needs to pass through the fresh air duct. Due to the temperature difference, the outdoor fresh air is prone to condensation on the inner wall of the air outlet cavity, and the condensation water is prone to flow back to the low point of the bend of the fresh air duct and gather, resulting in a "plop plop" sound like boiling water, which will not only bring serious discomfort to indoor users, but also cause blockage of the fresh air duct, affecting the normal operation of the air conditioner. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an air conditioner, which can control the operating state of the fresh air heating module according to the difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module, so that the controller can control the fresh air heating module more accurately and reliably, and improve the anti-condensation effect.

[0005] The present invention further proposes a fresh air heating control method for an air conditioner.

[0006] The air conditioner according to an embodiment of the present invention comprises: a casing; a heat exchanger, wherein the heat exchanger is arranged in the casing; a fan, wherein the fan is arranged in the casing, and the operation of the fan introduces the airflow outside the casing into the casing, and forms a heat exchange airflow through the heat exchanger, and the heat exchange airflow is output to the outside of the casing under the drive of the fan; a fresh air module, wherein the fresh air module comprises a fresh air duct, wherein the fresh air duct is used to introduce outdoor fresh air into the room, and one end of the fresh air duct indoor is connected to an air outlet cavity; a fresh air heating module, wherein the fresh air heating module is arranged at one end of the fresh air duct outdoors; an outdoor temperature sensor, wherein the outdoor temperature sensor is used to detect the outdoor temperature; an outdoor humidity sensor, wherein the outdoor humidity sensor is used to detect the outdoor humidity; a fresh air duct inner wall temperature sensor A sensor, the fresh air duct inner wall temperature sensor is used to detect the temperature of the inner wall of the indoor part of the fresh air duct; a controller, the controller is electrically connected to the outdoor temperature sensor, the outdoor humidity sensor, the fresh air duct inner wall temperature sensor and the fresh air heating module respectively, and the controller is configured as: when the air conditioner is turned on and the fresh air module starts to work, the outdoor dew point temperature is obtained according to the outdoor temperature and the outdoor humidity, and it is determined whether the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero; when the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, the operating state of the fresh air heating module is controlled according to the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module.

[0007] Therefore, the controller can control the operating state of the fresh air heating module according to the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module, so that the controller's control over the fresh air heating module is more accurate and reliable, and the anti-condensation effect is improved.

[0008] In some examples of the present invention, the controller is configured to: generate the fresh air heating module gear coordinate system according to the gear of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the inner wall of the fresh air duct; obtain the heating gear combination value according to the gear of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the inner wall of the fresh air duct; determine the heating gear of the fresh air heating module according to the position of the heating gear combination value in the fresh air heating module gear coordinate system; and control the fresh air heating module to operate at the corresponding heating gear.

[0009] In some examples of the present invention, the fresh air heating module gear coordinate system includes a plurality of fresh air heating gear areas, and each of the fresh air heating gear areas includes a plurality of heating gear combination values.

[0010] In some examples of the present invention, a first quadrant of the fresh air heating module gear position coordinate system is provided with a plurality of dividing lines, the plurality of dividing lines are arranged at equal intervals, and the fresh air heating gear position area is defined between two adjacent dividing lines.

[0011] In some examples of the present invention, the controller is configured such that: when the heating gear combination value is located inside the fresh air heating gear area, the heating gear is the gear corresponding to the fresh air heating gear area; when the heating gear combination value is located on the dividing line between two adjacent fresh air heating gear areas, the heating gear is the gear corresponding to the larger one of the two adjacent fresh air heating gear areas.

[0012] In some examples of the present invention, the slopes of the plurality of dividing lines are all -1.

[0013] According to an embodiment of the present invention, a fresh air heating control method for an air conditioner includes: the air conditioner is turned on and the fresh air module starts working, and the outdoor dew point temperature is obtained according to the outdoor temperature and outdoor humidity; it is determined whether the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero; when the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, the operating state of the fresh air heating module is controlled according to the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module.

[0014] In some examples of the present invention, when the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, controlling the operating state of the fresh air heating module according to the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module also includes: generating a fresh air heating module gear position coordinate system according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct; obtaining a heating gear combination value according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct; determining the heating gear of the fresh air heating module according to the position of the heating gear combination value in the fresh air heating module gear coordinate system; and controlling the fresh air heating module to operate at the corresponding heating gear.

[0015] In some examples of the present invention, determining the heating gear of the fresh air heating module according to the position of the heating gear combination value in the fresh air heating module gear coordinate system also includes: when the heating gear combination value is located inside the fresh air heating gear area, the heating gear is the gear corresponding to the fresh air heating gear area; when the heating gear combination value is located on the dividing line between two adjacent fresh air heating gear areas, the heating gear is the gear corresponding to the larger one of the two adjacent fresh air heating gear areas.

[0016] In some examples of the present invention, the first quadrant of the fresh air heating module gear coordinate system is provided with multiple dividing lines, the multiple dividing lines are arranged at equal intervals, the fresh air heating gear area is defined between two adjacent dividing lines, and the slopes of the multiple dividing lines are all -1.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of an air conditioner according to an embodiment of the present invention;

[0020] Figure 2 is a flow chart of a fresh air heating control method for an air conditioner according to an embodiment of the present invention;

[0021] Figure 3 is a flowchart of step S3 according to an embodiment of the present invention;

[0022] Figure 4 is a flowchart of step S3-3 according to an embodiment of the present invention;

[0023] Figure 5 is a partial flow chart of step S3-3 according to an embodiment of the present invention;

[0024] Figure 6 is a partial flow chart of step S3-3 according to an embodiment of the present invention;

[0025] Figure 7 Schematic diagram of a gear position coordinate system of a fresh air heating module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0027] Reference below Figure 1-Figure 7 An air conditioner according to an embodiment of the present invention is described, and the air conditioner may adopt a fresh air heating control method of the air conditioner.

[0028] Combination Figure 1As shown, the air conditioner according to the present invention can mainly include: a casing, a heat exchanger, a fan, a fresh air module, a fresh air heating module, an outdoor temperature sensor, an outdoor humidity sensor, a fresh air duct inner wall temperature sensor and a controller. The heat exchanger and the fan are both arranged in the casing, so that the casing can play a protective role for the heat exchanger and the fan, and can prevent the corrosion of foreign objects from the outside, and the damage of the heat exchanger and the fan structure caused by the impact of external forces, thereby improving the structural reliability of the heat exchanger and the fan, and can improve the structural reliability of the air conditioner, and ensure that the air conditioner can work normally.

[0029] Furthermore, a heat exchange air inlet and a heat exchange air outlet are provided on the casing. When the air conditioner is working, the airflow outside the casing can be introduced into the casing through the heat exchange air inlet by the operation of the fan, and then formed into a heat exchange airflow through heat exchange in the heat exchanger. The heat exchange airflow can be further output to the outside of the casing through the heat exchange air outlet under the drive of the fan, so that the air conditioner can deliver air with suitable temperature to the room, realize the air conditioner's regulating effect on the indoor temperature, ensure the normal operation of the air conditioner, and meet the user's usage needs.

[0030] Specifically, in the present application, the air conditioner and the outdoor unit of the air conditioner work together, wherein the heat exchanger can be an evaporator or a condenser, and the heat exchanger in the corresponding outdoor unit of the air conditioner is a condenser or an evaporator, and the air conditioner performs the refrigeration cycle of the air conditioner by using a compressor, an expansion valve, a condenser and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been conditioned and heat exchanged. The compressor compresses the refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process. The expansion valve expands the liquid phase refrigerant in a high temperature and high pressure state condensed in the condenser into a low pressure liquid phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low temperature and low pressure state to the compressor. The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the whole cycle, the air conditioner can adjust the temperature of the indoor space. Furthermore, the fan in the air conditioner of the present application can accelerate the flow rate of wind flowing through the heat exchanger, thereby improving the heat exchange efficiency of the heat exchanger and improving the working performance of the air conditioner.

[0031] Furthermore, the fresh air module includes a fresh air duct, one end of the fresh air duct indoors is connected to an air outlet cavity, the fresh air heating module is arranged at one end of the fresh air duct outdoors, and the controller is electrically connected to the outdoor temperature sensor, the outdoor humidity sensor, the fresh air duct inner wall temperature sensor and the fresh air heating module, respectively. The controller can be configured as follows: when the air conditioner is turned on and the fresh air module starts working, the outdoor dew point temperature is obtained according to the outdoor temperature and the outdoor humidity, and it is determined whether the temperature difference between the outdoor dew point temperature and the indoor wall of the fresh air duct is greater than zero; when the temperature difference between the outdoor dew point temperature and the indoor wall of the fresh air duct is greater than zero, the operating state of the fresh air heating module is controlled according to the temperature difference between the outdoor dew point temperature and the indoor wall of the fresh air duct and the gear position of the fresh air module.

[0032] Specifically, when the air conditioner is turned on and the fresh air module starts working, the fresh air module can introduce outdoor fresh air into the fresh air duct, and then transport it to the room through the air outlet chamber to realize the exchange of indoor and outdoor air, thereby purifying the indoor air, improving the indoor air quality, and increasing the oxygen content of the indoor air, which can ensure the comfort of indoor users. However, considering that the air outlet chamber is connected to the indoor environment, and due to space limitations, the surface of the plastic fresh air duct is generally not wrapped with insulation materials such as sponge, and the insulation performance of the fresh air duct is limited. The temperature of the inner wall of the indoor part of the fresh air duct may be lower than the condensation temperature of the outdoor fresh air. At this time, when the outdoor fresh air is introduced into the room, condensation is easy to occur when the outdoor fresh air passes through the inner wall of the fresh air duct, and the condensation water is easy to flow back to the fresh air duct and gather at the low point of the bend of the fresh air duct, causing abnormal noise when the air conditioner is working, and even blocking the fresh air duct, affecting the normal operation of the air conditioner and reducing the user experience of indoor users. Therefore, the temperature of the inner wall of the indoor part of the fresh air duct and the dew point temperature of the outdoor fresh air need to be considered when the air conditioner is working.

[0033] By setting an outdoor temperature sensor, an outdoor humidity sensor and a fresh air duct inner wall temperature sensor, the outdoor temperature sensor can detect the outdoor temperature, and the outdoor humidity sensor can detect the outdoor humidity, wherein the outdoor temperature is the temperature of the outdoor fresh air, the outdoor humidity is the humidity of the indoor fresh air, and the fresh air duct inner wall temperature sensor can detect the temperature of the inner wall of the indoor part of the fresh air duct, and the air conditioner can also include a calculation unit, and the outdoor temperature sensor, the outdoor humidity sensor and the fresh air duct inner wall temperature sensor are all electrically connected to the calculation unit, so that the calculation unit can receive the outdoor temperature detected by the outdoor temperature sensor, the outdoor humidity detected by the outdoor humidity sensor, and the temperature of the inner wall of the indoor part of the fresh air duct detected by the fresh air duct inner wall temperature sensor, and can calculate the outdoor dew point temperature according to the outdoor temperature and outdoor humidity.

[0034] Furthermore, by electrically connecting the calculation unit to the controller respectively, and electrically connecting the controller to the fresh air heating module, the controller can obtain the temperature of the inner wall of the indoor part of the fresh air duct, and the outdoor dew point temperature. The controller can correspondingly judge whether the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, thereby judging whether there is a risk of condensation on the inner wall of the indoor part of the fresh air duct, and according to the judgment result, control the operating state of the fresh air heating module, so that the fresh air heating module operates at different gears under different conditions, and thus can selectively heat the outdoor fresh air.

[0035] When the controller determines that the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is not greater than zero, it means that there is no condensation risk of the outdoor fresh air on the indoor wall of the indoor part of the fresh air duct. The outdoor fresh air can be introduced normally without heating the outdoor fresh air. In this case, the fresh air heating module can be controlled to be turned off. While ensuring that the outdoor fresh air will not condense on the indoor wall of the indoor part of the fresh air duct and ensuring the user experience, the fresh air heating module can avoid excess power consumption, thereby avoiding energy waste and ensuring the environmental friendliness of the air conditioner.

[0036] When the controller determines that the temperature difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct is greater than zero, it indicates that there is a risk of condensation on the inner wall of the indoor part of the fresh air duct. In this case, the operating state of the fresh air heating module can be controlled accordingly according to the temperature difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct, as well as the gear position of the fresh air module. In this way, while ensuring the normal introduction of outdoor fresh air, ensuring the exchange of indoor and outdoor air, and improving the indoor air quality, the actual operating state of the fresh air heating module can take into account the condensation risk of the outdoor fresh air and the operating state of the fresh air module itself. This can not only ensure that the temperature of the outdoor fresh air flowing to the inside of the fresh air duct is above the dew point temperature, preventing the outdoor fresh air from condensing on the indoor part of the fresh air duct, thereby ensuring the comfort of indoor users, but also make the controller's control over the fresh air heating module more precise, and can more effectively and reliably prevent the outdoor fresh air from condensing on the indoor part of the fresh air duct, thereby improving the working performance of the air conditioner, and making the air conditioner more intelligent and reliable.

[0037] Therefore, by configuring the controller, the controller can obtain the outdoor dew point temperature according to the outdoor temperature and outdoor humidity, determine whether the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, and can control the operating state of the fresh air heating module according to the judgment result, thereby more effectively and reliably preventing the outdoor fresh air from condensing on the inner wall of the indoor part of the fresh air duct, improving the user experience, and making the air conditioner more intelligent and reliable.

[0038] Combination Figure 7As shown, the controller can be configured to: generate a fresh air heating module gear coordinate system according to the gear of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the inner wall of the fresh air duct; obtain a heating gear combination value according to the gear of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the inner wall of the fresh air duct; determine the heating gear of the fresh air heating module at the position of the fresh air heating module gear coordinate system according to the heating gear combination value; and control the fresh air heating module to operate at the corresponding heating gear.

[0039] Specifically, the controller can be further configured so that the controller uses the gear position of the fresh air module as the horizontal coordinate and the temperature difference between the outdoor dew point temperature and the indoor part of the inner wall of the fresh air duct as the vertical coordinate to generate a gear coordinate system of the fresh air heating module. The gear coordinate system is pre-stored in the controller. When the controller controls the operation of the fresh air heating module, the controller can first obtain the current gear position of the fresh air module and the outdoor dew point. The gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the fresh air duct can constitute a heating gear combination value. Then, the controller can determine the heating gear of the fresh air heating module according to the position of the heating gear combination value in the gear coordinate system of the fresh air heating module, so that the fresh air heating module can be controlled to operate at the corresponding heating gear. In this way, the determination of the heating gear of the fresh air heating module can be made simpler and more reliable, so that the control logic of the air conditioner can be made simpler and more reliable, and the anti-condensation effect of the air conditioner on the outdoor fresh air can be better while ensuring the normal introduction of outdoor fresh air and improving the indoor air quality.

[0040] Furthermore, the fresh air heating module gear coordinate system may include multiple fresh air heating gear areas, and each fresh air heating gear area may include multiple heating gear combination values. Specifically, after the controller generates the gear coordinate system of the fresh air heating module according to the gear of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct, the gear coordinate system of the fresh air heating module can include multiple fresh air heating gear areas, so that each heater gear area corresponds to a fresh air heating gear, the closer the fresh air heating gear area is to the upper right, the larger the fresh air heating gear, and the higher the heating power of the fresh air heating module. Each fresh air heating gear area includes multiple heating gear combination values, so that any heating gear combination value can find the corresponding fresh air heating gear in the gear coordinate system of the fresh air heating module, and multiple heating gear combination values ​​may correspond to the same fresh air heating gear. Therefore, on the premise of ensuring that the controller can accurately determine the corresponding heating gear of the fresh air module in the gear coordinate system of the fresh air heating module through the heating gear combination value, making the determination of the heating gear simpler and more reliable, the setting of the number of heating gears of the fresh air heating module can be made more reasonable, avoiding frequent changes in the heating gear of the fresh air heating module, and further optimizing the control logic of the controller over the fresh air heating module to improve the working performance of the air conditioner.

[0041] Combination Figure 7 As shown, the first quadrant of the fresh air heating module gear coordinate system is provided with a plurality of dividing lines, and the plurality of dividing lines are arranged at equal intervals, and a fresh air heating gear area is defined between two adjacent dividing lines. Specifically, the fresh air heating module gear coordinate system falls in the first quadrant, and by setting a plurality of dividing lines in the first quadrant, the plurality of dividing lines are connected by the combination values ​​on the horizontal axis and the combination values ​​on the vertical axis, and the plurality of dividing lines are arranged at equal intervals, so that a fresh air heating gear area can be defined between two adjacent dividing lines, so that the distribution of the fresh air heating gear area can be made more reasonable, and the matching between the setting of the heating gear and the gear of the fresh air module, as well as the temperature difference between the outdoor dew point temperature and the indoor part of the inner wall of the fresh air duct can be made better, so that the switching of the heating gear of the fresh air heating module can be made more convenient, and the operation of the fresh air heating module can be made more stable and reliable.

[0042] Further, the controller is configured as follows: when the heating gear combination value is located inside the fresh air heating gear area, the heating gear is the gear corresponding to the fresh air heating gear area; when the heating gear combination value is located on the dividing line between two adjacent fresh air heating gear areas, the heating gear is the gear corresponding to the larger one of the two adjacent fresh air heating gear areas.

[0043] Specifically, a fresh air heating gear area is defined between two adjacent dividing lines. When the controller determines the heating gear of the fresh air heating module according to the heating gear combination value, the heating gear combination value may fall inside the fresh air heating gear area or may fall on the dividing line between two adjacent fresh air heating gear areas. Through further configuration of the controller, the controller determines the actual heating gear of the fresh air heating module according to the position of the heating gear combination value in the fresh air heating module gear coordinate system.

[0044] When the heating gear combination value is located inside the fresh air heating gear area, the controller determines the heating gear as the gear corresponding to the fresh air heating gear area; when the heating gear combination value is located on the dividing line between two adjacent fresh air heating gear areas, the controller determines the heating gear as the gear corresponding to the larger one of the two adjacent fresh air heating gear areas. In this way, when the controller controls the fresh air heating module to work in the heating gear, it can not only enable the fresh air heating module to heat the outdoor fresh air more timely and efficiently, increase the temperature of the outdoor fresh air, and ensure that the temperature of the outdoor fresh air is higher than the dew point temperature, thereby avoiding condensation of the outdoor fresh air on the inner wall of the indoor part of the fresh air duct and improving the user's comfort, but also prevent the fresh air heating module from consuming excess electricity resources, avoid energy waste, and ensure the environmental friendliness of the air conditioner. In this way, the determination of the heating gear of the fresh air heating module can be more scientific and reasonable, and the air conditioner can be made more intelligent and reliable.

[0045] Furthermore, the slopes of multiple dividing lines are all -1. Specifically, by setting the slopes of multiple dividing lines to -1, the gear position of the fresh air module on the dividing line is correlated with the temperature difference between the outdoor dew point temperature and the indoor part of the fresh air duct inner wall, and the ratio is -1, and the fresh air heating gear area is defined between adjacent dividing lines. When the controller determines the actual heating gear position of the fresh air heating module according to the heating gear combination value in the position of the heating gear combination value in the fresh air heating module gear coordinate system, a balance can be achieved between the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the fresh air duct inner wall, so that the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the fresh air duct inner wall can be fully considered, that is, the actual operation state of the fresh air heating module can be further guaranteed to take into account the condensation risk of the outdoor fresh air and the operation state of the fresh air module itself, and then the setting of the dividing line in the gear coordinate system of the fresh air heating module can be further optimized, so that the determination of the heating gear position of the fresh air heating module is more scientific and more reliable.

[0046] Combination Figure 2 As shown, the fresh air heating control method of the air conditioner according to the embodiment of the present invention may include the following steps:

[0047] S1, the air conditioner is turned on and the fresh air module starts working, and the outdoor dew point temperature is obtained according to the outdoor temperature and outdoor humidity;

[0048] S2, determining whether the temperature difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct is greater than zero;

[0049] S3. When the temperature difference between the outdoor dew point temperature and the inner wall temperature of the indoor part of the fresh air duct is greater than zero, the operation state of the fresh air heating module is controlled according to the temperature difference between the outdoor dew point temperature and the inner wall temperature of the indoor part of the fresh air duct and the gear position of the fresh air module.

[0050] Specifically, when the air conditioner is turned on and the fresh air module starts working, the controller can first obtain the outdoor temperature, outdoor humidity and the temperature of the inner wall of the indoor part of the fresh air duct, and then calculate the outdoor dew point temperature based on the outdoor temperature and outdoor humidity, and determine whether the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, and based on the judgment result, selectively control the operation of the fresh air heating module and control the operating status of the fresh air heating module.

[0051] When the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is not greater than zero, the controller determines that there is no condensation risk of the outdoor fresh air on the inner wall of the indoor part of the fresh air duct. At this time, the controller can control the fresh air heating module to turn off, so that the air conditioner can normally introduce outdoor fresh air and complete the indoor and outdoor air exchange, thereby purifying the indoor air, improving the indoor air quality, and increasing the indoor air oxygen content, ensuring the comfort of indoor users and avoiding the waste of excess energy generated by the fresh air heating module.

[0052] When the difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct is greater than zero, the controller determines that there is a risk of condensation on the indoor part of the fresh air in the fresh air. The controller can control the operating state of the fresh air heating module according to the difference between the outdoor dew point temperature and the temperature of the indoor part of the fresh air duct, as well as the gear position of the fresh air module. On the premise of ensuring the normal introduction of outdoor fresh air and the exchange of indoor and outdoor air, the actual operating state of the fresh air heating module can take into account the condensation risk of the outdoor fresh air and the operating state of the fresh air module itself, thereby not only preventing the outdoor fresh air from condensing on the indoor part of the fresh air duct, but also making the controller's control over the fresh air heating module more precise, and more effectively and reliably preventing the outdoor fresh air from condensing on the indoor part of the fresh air duct, thereby improving the working performance of the air conditioner, making the air conditioner more intelligent and reliable, and improving the comfort of indoor users.

[0053] Furthermore, combined with Figure 3 As shown, step S3 may mainly include:

[0054] S3-1. Generate a fresh air heating module gear position coordinate system according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct;

[0055] S3-2, obtaining a heating gear combination value according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct;

[0056] S3-3, determining the heating gear of the fresh air heating module according to the heating gear combination value at the position of the fresh air heating module gear coordinate system;

[0057] S3-4, control the fresh air heating module to operate at the corresponding heating gear.

[0058] Specifically, when the controller determines that the difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct is greater than zero, and controls the operating state of the fresh air heating module according to the difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module, the controller can first use the gear position of the fresh air module as the horizontal coordinate and the temperature difference between the outdoor dew point temperature and the temperature of the inner wall of the indoor part of the fresh air duct as the vertical coordinate to generate the gear coordinate system of the fresh air heating module, and then obtain the current gear position of the fresh air module and the outdoor dew point, and obtain the heating gear combination value according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the indoor part of the fresh air duct, and then determine the heating gear of the fresh air heating module according to the position of the heating gear combination value in the gear coordinate system of the fresh air heating module, so that the fresh air heating module can be controlled to operate at the corresponding heating gear, and the heating gear of the fresh air heating module can be determined more scientifically while ensuring the normal introduction of outdoor fresh air and improving the indoor air quality, so that the air conditioner can have a better anti-condensation effect on outdoor fresh air.

[0059] Combination Figure 4-Figure 6 As shown, step S3-3 may also include:

[0060] S3-3-1. When the heating gear combination value is within the fresh air heating gear area, the heating gear is the gear corresponding to the fresh air heating gear area;

[0061] S3-3-2. When the heating gear combination value is located on the dividing line between two adjacent fresh air heating gear areas, the heating gear is the gear corresponding to the larger one of the two adjacent fresh air heating gear areas.

[0062] Specifically, when the controller determines the heating gear of the fresh air heating module according to the position of the heating gear combination value in the gear coordinate system of the fresh air heating module, the controller can first determine the position of the heating gear combination value in the gear coordinate system of the fresh air heating module, and determine the actual heating gear of the fresh air heating module according to the heating gear combination value being located inside the fresh air heating gear area, or the heating gear combination value being located on the dividing line between two adjacent fresh air heating gear areas.

[0063] When the heating gear combination value is within the fresh air heating gear area, the heating gear of the fresh air heating module can be directly determined as the gear corresponding to the fresh air heating gear area, and the controller can control the fresh air heating module to operate at this heating gear, thereby making the determination of the heating gear simpler and more reliable, preventing the fresh air heating module from consuming excess electricity resources, avoiding energy waste, and ensuring the environmental friendliness of the air conditioner.

[0064] When the heating gear combination value is on the dividing line between two adjacent fresh air heating gear areas, the heating gear of the fresh air heating module can be determined as the gear corresponding to the larger one of the two adjacent fresh air heating gear areas. This can ensure that the fresh air heating module heats the outdoor fresh air more promptly and efficiently, and ensure that the temperature of the outdoor fresh air is higher than the dew point temperature, thereby avoiding condensation of the outdoor fresh air on the inner wall of the indoor part of the fresh air duct, thereby improving user comfort.

[0065] In this way, the heating gear of the fresh air heating module can be determined more scientifically and reasonably, making the air conditioner more intelligent and reliable.

[0066] Combination Figure 7 As shown, the first quadrant of the fresh air heating module gear coordinate system is provided with multiple dividing lines, and the multiple dividing lines are equidistantly spaced, and the fresh air heating gear area is defined between two adjacent dividing lines, and the slopes of the multiple dividing lines are all -1. Such a setting can optimize the design of the fresh air heating module gear coordinate system, and make the setting and distribution of the fresh air heating gear area more reasonable. Therefore, when the controller determines the heating gear of the fresh air heating module according to the heating gear combination value at the position of the fresh air heating module gear coordinate system, the heating gear of the fresh air heating module can be better matched with the gear of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct, so that the setting of the heating gear is more reasonable and scientific, thereby further improving the anti-condensation effect of the air conditioner and improving the working performance of the air conditioner.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0069] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that: include: chassis; a heat exchanger, the heat exchanger being disposed in the casing; A fan, the fan being arranged in the casing, the operation of the fan introducing the airflow outside the casing into the casing, and forming a heat exchange airflow through the heat exchanger, and the heat exchange airflow is output to the outside of the casing under the drive of the fan; A fresh air module, the fresh air module comprising a fresh air duct, the fresh air duct is used to introduce outdoor fresh air into the room, one end of the fresh air duct indoors is connected to an air outlet cavity; A fresh air heating module, the fresh air heating module is arranged at one end outside the fresh air duct; An outdoor temperature sensor, wherein the outdoor temperature sensor is used to detect the outdoor temperature; An outdoor humidity sensor, wherein the outdoor humidity sensor is used to detect outdoor humidity; A fresh air duct inner wall temperature sensor, the fresh air duct inner wall temperature sensor is used to detect the temperature of the inner wall of the indoor part of the fresh air duct; A controller, wherein the controller is electrically connected to the outdoor temperature sensor, the outdoor humidity sensor, the fresh air duct inner wall temperature sensor and the fresh air heating module respectively, and the controller is configured as follows: When the air conditioner is turned on and the fresh air module starts working, the outdoor dew point temperature is obtained according to the outdoor temperature and the outdoor humidity, and it is determined whether the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero. When the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, the operation state of the fresh air heating module is controlled according to the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module, specifically: Generate the fresh air heating module gear position coordinate system according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct; Obtaining a heating gear combination value according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct; Determining the heating gear of the fresh air heating module according to the position of the heating gear combination value in the fresh air heating module gear coordinate system; The fresh air heating module is controlled to operate at a corresponding heating gear.

2. The air conditioner according to claim 1, characterized in that: The fresh air heating module gear coordinate system includes a plurality of fresh air heating gear areas, and each of the fresh air heating gear areas includes a plurality of heating gear combination values.

3. The air conditioner according to claim 2, characterized in that: The first quadrant of the fresh air heating module gear position coordinate system is provided with a plurality of dividing lines, the plurality of dividing lines are arranged at equal intervals, and the fresh air heating gear position area is defined between two adjacent dividing lines.

4. The air conditioner according to claim 3, characterized in that: The controller is configured such that: when the heating gear combination value is located inside the fresh air heating gear area, the heating gear is the gear corresponding to the fresh air heating gear area; when the heating gear combination value is located on the dividing line between two adjacent fresh air heating gear areas, the heating gear is the gear corresponding to the larger one of the two adjacent fresh air heating gear areas.

5. The air conditioner according to claim 3, characterized in that: The slopes of the plurality of dividing lines are all -1.

6. A method for controlling fresh air heating of an air conditioner, applied to the air conditioner according to any one of claims 1 to 5, characterized in that: include: The air conditioner is turned on and the fresh air module starts working, and the outdoor dew point temperature is obtained according to the outdoor temperature and outdoor humidity; Determine whether the temperature difference between the outdoor dew point temperature and the inner wall temperature of the indoor part of the fresh air duct is greater than zero; When the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, the operating state of the fresh air heating module is controlled according to the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module.

7. The fresh air heating control method of the air conditioner according to claim 6, characterized in that: When the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct is greater than zero, controlling the operating state of the fresh air heating module according to the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct and the gear position of the fresh air module also includes: Generate a fresh air heating module gear position coordinate system according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct; Obtaining a heating gear combination value according to the gear position of the fresh air module and the temperature difference between the outdoor dew point temperature and the inner wall of the indoor part of the fresh air duct; Determining the heating gear of the fresh air heating module according to the position of the heating gear combination value in the fresh air heating module gear coordinate system; The fresh air heating module is controlled to operate at a corresponding heating gear.

8. The fresh air heating control method of the air conditioner according to claim 7, characterized in that: The fresh air heating module gear coordinate system includes a plurality of fresh air heating gear areas, and determining the heating gear of the fresh air heating module according to the position of the heating gear combination value at the fresh air heating module gear coordinate system also includes: When the heating gear combination value is located inside the fresh air heating gear area, the heating gear is the gear corresponding to the fresh air heating gear area; When the heating gear combination value is located on the dividing line between two adjacent fresh air heating gear areas, the heating gear is the gear corresponding to the larger one of the two adjacent fresh air heating gear areas.

9. The fresh air heating control method of the air conditioner according to claim 8, characterized in that: The first quadrant of the fresh air heating module gear position coordinate system is provided with a plurality of dividing lines, the plurality of dividing lines are arranged at equal intervals, the fresh air heating gear position area is defined between two adjacent dividing lines, and the slopes of the plurality of dividing lines are all -1.

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