Air conditioner and fresh air heating control method thereof

Abstract

The invention discloses an air conditioner and a method for controlling fresh air heating of the air conditioner. The air conditioner comprises: a housing; a heat exchanger; a fan; a fresh air module; a fresh air heating module; an indoor temperature sensor; a temperature sensor inside an air outlet cavity; an outdoor humidity sensor; and a controller. The controller is configured to: when the air conditioner is turned on and the fresh air module starts to work, judge the size of the indoor temperature and the temperature inside the air outlet cavity, and judge the size between the outdoor humidity and a first humidity threshold value. When the indoor temperature is not lower than the temperature inside the air outlet cavity, control the fresh air heating module to be turned off; when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold value, control the fresh air heating module to selectively operate at different powers. Thus, the controller can control the fresh air heating module to selectively heat the outdoor fresh air according to the indoor temperature, the temperature inside the air outlet cavity and the outdoor humidity, so that the temperature of the outdoor fresh air is higher than the dew point temperature, and avoid condensation of the outdoor fresh air inside the air outlet cavity.

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 purpose of the present invention is to provide an air conditioner, which can selectively control the operation of the fresh air heating module according to the temperature inside the air outlet cavity, the indoor temperature and the outdoor humidity, so that the temperature of the outdoor fresh air is higher than the dew point temperature when passing through the inside of the air outlet cavity, thereby avoiding condensation of the outdoor fresh air inside the air outlet cavity and improving the user experience of indoor users.

[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 indoors 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 indoor temperature sensor, wherein the indoor temperature sensor is used to detect the indoor temperature; a temperature sensor inside the air outlet cavity, wherein the temperature sensor inside the air outlet cavity is used to detect the temperature of the air outlet cavity The temperature inside the air cavity; an outdoor humidity sensor, which is used to detect the outdoor humidity; a controller, which is electrically connected to the indoor temperature sensor, the temperature sensor inside the air outlet cavity, the outdoor humidity sensor and the fresh air heating module respectively, and the controller is configured to: when the air conditioner is turned on and the fresh air module starts working, judge the size of the indoor temperature and the temperature inside the air outlet cavity, and judge the size between the outdoor humidity and a first humidity threshold; when the indoor temperature is not lower than the temperature inside the air outlet cavity, control the fresh air heating module to be turned off; when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, control the fresh air heating module to selectively operate at different powers.

[0007] Therefore, the controller can control the operation of the fresh air heating module according to the indoor temperature, the temperature inside the air outlet cavity and the outdoor humidity, and selectively heat the outdoor fresh air so that the temperature of the outdoor fresh air is higher than the dew point temperature, thereby avoiding condensation of the outdoor fresh air inside the air outlet cavity and improving the user experience.

[0008] In some examples of the present invention, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the controller is configured to: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold and less than a second humidity threshold, control the fresh air heating module to operate at a first power.

[0009] In some examples of the present invention, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the controller is configured to: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a second humidity threshold, control the fresh air heating module to operate at a second power, wherein the second power is greater than the first power.

[0010] In some examples of the present invention, the controller is further configured to control the fresh air heating module to be turned off when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is not greater than a first humidity threshold.

[0011] In some examples of the present invention, the first humidity threshold is H1, and H1 satisfies the relationship: 25%RH≤H1≤35%RH.

[0012] In some examples of the present invention, the second humidity threshold is H2, and H2 satisfies the relationship: 75%RH≤H2≤85%RH.

[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, the indoor temperature and the temperature inside the air outlet cavity are judged, and the size between the outdoor humidity and a first humidity threshold is judged; when the indoor temperature is not lower than the temperature inside the air outlet cavity, the fresh air heating module is turned off; when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the fresh air heating module selectively operates at different powers.

[0014] In some examples of the present invention, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the fresh air heating module selectively operates at different powers and further includes: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold and less than a second humidity threshold, the fresh air heating module operates at a first power.

[0015] In some examples of the present invention, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the fresh air heating module selectively operates at different powers and further includes: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a second humidity threshold, the fresh air heating module operates at a second power, wherein the second power is greater than the first power.

[0016] In some examples of the present invention, after determining the size of the indoor temperature and the temperature inside the air outlet cavity, and determining the size between the outdoor humidity and a first humidity threshold, it also includes: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is not greater than the first humidity threshold, the fresh air heating module is turned off.

[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 partial flow chart of a fresh air heating control method for an air conditioner according to an embodiment of the present invention;

[0022] Figure 4 is a partial flow chart of a fresh air heating control method for an air conditioner according to an embodiment of the present invention;

[0023] Figure 5 is a partial flow chart of a fresh air heating control method for an air conditioner according to an embodiment of the present invention;

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

[0025] Figure 7 is a partial flow chart of step S3 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 1 As 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 indoor temperature sensor, an air outlet cavity inner temperature sensor, an outdoor humidity 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 indoor temperature sensor, the temperature sensor inside the air outlet cavity, the outdoor humidity 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, it judges the size of the indoor temperature and the temperature inside the air outlet cavity, and judges the size between the outdoor humidity and a first humidity threshold. When the indoor temperature is not lower than the temperature inside the air outlet cavity, the fresh air heating module is controlled to be turned off; when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the fresh air heating module is controlled to operate selectively at different powers.

[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, so as 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, thereby ensuring 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 air outlet chamber made of plastic is generally not wrapped with thermal insulation materials such as sponge, the indoor temperature and the temperature inside the air outlet chamber will affect the temperature difference on the surface of the air outlet chamber, and outdoor fresh air with appropriate humidity is prone to condensation when passing through the surface of the air outlet chamber with temperature difference. 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 indoor temperature, the temperature inside the air outlet chamber and the outdoor humidity need to be considered when the air conditioner is working.

[0033] By setting an indoor temperature sensor, a temperature sensor inside the air outlet cavity and an outdoor humidity sensor, the indoor temperature sensor can detect the indoor temperature, the temperature sensor inside the air outlet cavity can detect the temperature inside the air outlet cavity, the outdoor humidity sensor can detect the outdoor humidity, and the air conditioner can also include a storage unit, which can pre-store a first humidity threshold and the operating power of the fresh air heating module.

[0034] Furthermore, by electrically connecting the indoor temperature sensor, the temperature sensor inside the air outlet cavity, the outdoor humidity sensor and the storage unit to the controller respectively, and electrically connecting the controller to the fresh air heating module, the controller can obtain the indoor temperature detected by the indoor temperature sensor, the temperature inside the air outlet cavity detected by the temperature sensor inside the air outlet cavity, and the outdoor humidity detected by the outdoor humidity sensor, and the controller can obtain the first humidity threshold from the storage unit. By configuring the controller, the controller can correspondingly judge the size of the indoor temperature and the temperature inside the air outlet cavity, and judge the size between the outdoor humidity and the first humidity threshold, so as to judge whether there is a condensation risk inside the air outlet cavity, and control the operation of the fresh air heating module according to the judgment result, so that the fresh air heating module can operate at different powers under different conditions, and thus selectively heat the outdoor fresh air.

[0035] When the indoor temperature is not lower than the temperature inside the air outlet cavity, it means that there is no risk of condensation of the outdoor fresh air inside the air outlet cavity. 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 inside of the air outlet cavity and ensuring the user experience, it can avoid the consumption of excess power, thereby avoiding energy waste and ensuring the environmental friendliness of the air conditioner.

[0036] When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, it means that there is a temperature difference on the surface of the air outlet cavity and the humidity of the outdoor fresh air is also large. There is a risk of condensation in the outdoor fresh air inside the air outlet cavity. In this case, the fresh air heating module can be controlled to operate selectively at different powers. In this way, the actual operating power of the fresh air heating module can be matched with the indoor temperature and the temperature inside the air outlet cavity 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 power of the fresh air module can be matched with the outdoor humidity and the first humidity threshold, that is, the outdoor fresh air can be selectively heated to ensure that the temperature of the outdoor fresh air flowing to the inside of the air outlet cavity is above the dew point temperature, thereby preventing condensation in the outdoor fresh air inside the air outlet cavity. This can improve the adaptability of the air conditioner to high temperature and high humidity weather in summer, ensure the comfort of indoor users, and make the air conditioner more intelligent and reliable.

[0037] Therefore, by configuring the controller, the controller can judge the size of the indoor temperature and the temperature inside the air outlet cavity, as well as the size between the outdoor humidity and the first humidity threshold, and can control the fresh air heating module to be turned off according to the judgment result, or selectively operate at different powers, thereby ensuring that the temperature of the outdoor fresh air inside the air outlet cavity is higher than the dew point temperature, preventing condensation of the outdoor fresh air inside the air outlet cavity, improving the user experience, and making the air conditioner more intelligent and reliable.

[0038] Further, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the controller is configured to: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold and less than the second humidity threshold, control the fresh air heating module to operate at the first power. Specifically, the storage unit also stores a second humidity threshold, the second humidity threshold is greater than the first humidity threshold, when the controller determines that the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the controller can be further configured so that the controller corresponds to the relationship between the outdoor humidity and the first humidity threshold and the second humidity threshold. If it is determined that the outdoor humidity is greater than the first humidity threshold and less than the second humidity threshold, it means that the humidity of the outdoor fresh air is medium at this time, and the risk level of condensation when the outdoor fresh air flows inside the air outlet cavity is also medium. At this time, the fresh air heating module can be controlled to operate at the first power. In this way, on the one hand, the outdoor fresh air can be heated by the fresh air heating module to increase the temperature of the outdoor fresh air, ensure that the temperature of the outdoor fresh air is higher than the dew point temperature, and avoid condensation of the outdoor fresh air inside the air outlet cavity. On the other hand, it can also avoid the fresh air heating module working at a higher power, resulting in energy waste.

[0039] Further, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the controller is configured to: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the second humidity threshold, control the fresh air heating module to operate at the second power, wherein the second power is greater than the first power. Specifically, when the controller determines that the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the controller can be further configured so that the controller correspondingly determines the relationship between the outdoor humidity and the first humidity threshold and the second humidity threshold. If it is determined that the outdoor humidity is greater than the second humidity threshold, it means that the humidity of the outdoor fresh air is high at this time, and the risk of condensation when the outdoor fresh air flows inside the air outlet cavity is also high. At this time, the fresh air heating module can be controlled to operate at the second power greater than the first power, so that the fresh air heating module can heat the outdoor fresh air in a timely and efficient manner, 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 inside the air outlet cavity, and improving the user's comfort.

[0040] In this way, through further configuration of the controller, when the indoor temperature is lower than the temperature inside the air outlet chamber and the outdoor humidity is greater than the first humidity threshold, the operating power of the fresh air heating module can be more matched with the outdoor humidity, so that the operation of the fresh air heating module can be more intelligent and reliable, and the heating of the outdoor fresh air by the fresh air heating module can be more controllable, thereby improving the working performance of the air conditioner, avoiding condensation of the outdoor fresh air on the inside of the fresh air duct, and improving the user experience.

[0041] Among them, the first power can be set to 500W, and the second power can be set to 250W, so that the settings of the first power and the second power can be more reasonable, and the controller can control the operating power of the fresh air heating module more reasonably, so that the heating of the outdoor fresh air by the fresh air heating module can be better matched with the outdoor humidity, and the heating of the outdoor fresh air by the fresh air heating module can be further made more reasonable and efficient, which can not only effectively avoid the condensation of the outdoor fresh air on the inner side of the air outlet cavity and improve the user experience, but also ensure the energy utilization rate of the air conditioner and avoid energy waste. It should be noted that the first power and the second power can be adjusted as needed, so that the heating efficiency of the fresh air heating module can be adjusted according to actual needs to improve the working efficiency of the air conditioner.

[0042] Furthermore, the controller can also be configured to: when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is not greater than the first humidity threshold, control the fresh air heating module to turn off. Specifically, when the controller determines that the indoor temperature is lower than the temperature inside the air outlet cavity, and determines that the outdoor humidity is not greater than the first humidity threshold, it means that the humidity of the outdoor fresh air is low at this time. Even if the indoor temperature is lower than the temperature inside the air outlet cavity, there is no risk of condensation of the outdoor fresh air inside the air outlet cavity. The outdoor fresh air can be introduced normally without heating the outdoor fresh air. In this case, through further configuration of the controller, the controller can control the fresh air heating module to turn off. In this way, while ensuring that the outdoor fresh air will not condense inside the air outlet cavity and the user experience is guaranteed, it can also avoid the consumption of excess power, thereby avoiding energy waste and ensuring the environmental friendliness of the air conditioner.

[0043] In some embodiments of the present invention, the first humidity threshold is H1, and H1 satisfies the relationship: 25%RH≤H1≤35%RH. Specifically, the first humidity threshold can be set within a reasonable range, so that after the controller determines that the indoor temperature is lower than the temperature inside the air outlet cavity, it can accurately determine the condensation risk of the outdoor fresh air inside the air outlet cavity by determining the relationship between the outdoor humidity and the first humidity threshold, and correspondingly control the shutdown and operation of the fresh air heating module, thereby ensuring the reliability of the air conditioner and improving the user experience.

[0044] In some embodiments of the present invention, the second humidity threshold is H2, and H2 satisfies the relationship: 75%RH≤H2≤85%RH. Specifically, the second humidity threshold can be set within a reasonable range, so that after the controller determines that the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, it can more accurately determine the condensation risk of the outdoor fresh air inside the air outlet cavity by judging the relationship between the outdoor humidity and the second humidity threshold, and correspondingly control the fresh air heating module to selectively operate at different powers, so that the fresh air heating module heats the outdoor fresh air more reasonably, thereby further improving the reliability of the air conditioner and enhancing the user experience.

[0045] It should be noted that in actual applications, the first humidity threshold and the second humidity threshold can be adjusted as needed to adapt to the user's usage needs in different scenarios, further enhance the intelligence and humanization of the air conditioner, broaden the application scenarios of the air conditioner, and further enhance the user's experience.

[0046] Combination Figure 2-Figure 4 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 indoor temperature and the temperature inside the air outlet cavity are determined, and the difference between the outdoor humidity and the first humidity threshold is determined;

[0048] S2: When the indoor temperature is not lower than the temperature inside the air outlet cavity, the fresh air heating module is turned off;

[0049] S3. When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the fresh air heating module selectively operates at different powers.

[0050] Specifically, when the air conditioner is turned on and the fresh air module starts working, the controller can first obtain the indoor temperature, the temperature inside the air outlet cavity, the outdoor humidity and the first humidity threshold, and then judge the size of the indoor temperature and the temperature inside the air outlet cavity, as well as the size between the outdoor humidity and the first humidity threshold, and selectively control the operation of the fresh air heating module based on the judgment result.

[0051] When the indoor temperature is not lower than the temperature inside the air outlet cavity, the controller determines that there is no condensation risk of the outdoor fresh air inside the air outlet cavity. The controller can control the fresh air heating module to close, 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 energy waste.

[0052] When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the controller determines that there is a risk of condensation in the outdoor fresh air inside the air outlet cavity. The controller can control the fresh air heating module to selectively operate at different powers, thereby heating the outdoor incoming air and effectively controlling the temperature of the outdoor fresh air so that the temperature of the outdoor fresh air is higher than the dew point temperature. Under the premise of ensuring the normal introduction of outdoor fresh air and the exchange of indoor and outdoor air, condensation of outdoor fresh air on the inside of the air outlet cavity can be avoided, thereby ensuring the comfort of indoor users.

[0053] Furthermore, combined with Figure 2 , Figure 6 and Figure 7 As shown, step S3 may mainly include:

[0054] S3-1, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold and less than the second humidity threshold, the fresh air heating module operates at the first power;

[0055] S3-2. When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a second humidity threshold, the fresh air heating module operates at a second power, wherein the second power is greater than the first power.

[0056] Specifically, when it is determined that the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the controller controls the fresh air heating module to selectively operate at different powers, and the controller can further judge the outdoor humidity and the second humidity threshold, and selectively control the operating power of the fresh air heating module according to the judgment result. The second humidity threshold is greater than the first humidity threshold, and the second power is greater than the first power.

[0057] When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold and less than the second humidity threshold, the controller can control the fresh air heating module to operate at the first power, so that the fresh air heating module heats the outdoor fresh air, thereby ensuring the introduction of indoor fresh air and improving the indoor air quality while preventing condensation of outdoor fresh air on the inside of the air outlet cavity, thereby ensuring the comfort of indoor users.

[0058] When the indoor temperature is lower than the temperature inside the air outlet chamber and the outdoor humidity is greater than the second humidity threshold, the controller can control the fresh air heating module to operate at the second power, so that the fresh air heating module can heat the outdoor fresh air in a timely and efficient manner, thereby ensuring the introduction of indoor fresh air and improving the indoor air quality. On the premise of this, it can further effectively prevent the outdoor fresh air from condensing on the inside of the air outlet chamber, thereby improving the working efficiency of the fresh air heating module and enhancing the user experience.

[0059] In this way, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold, the operation of the fresh air heating module can be better matched with the outdoor humidity, the fresh air heating control method of the air conditioner can be made more scientific and reasonable, the air conditioner can be made more intelligent and reliable, and the working performance of the air conditioner can be improved.

[0060] Combination Figure 2 and Figure 7 As shown, after step S1, the fresh air heating control method of the air conditioner may further include: S4, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is not greater than the first humidity threshold, the fresh air heating module is turned off. Specifically, when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is not greater than the first humidity threshold, the controller determines that there is no condensation risk of the outdoor fresh air inside the air outlet cavity, and the controller may control the fresh air heating module to be turned 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. The fresh air heating control method of the air conditioner can be further improved to ensure the comfort of indoor users and avoid energy waste.

[0061] 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.

[0062] 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.

[0063] 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 indoor temperature sensor, wherein the indoor temperature sensor is used to detect the indoor temperature; A temperature sensor inside the air outlet cavity, the temperature sensor inside the air outlet cavity is used to detect the temperature inside the air outlet cavity; An outdoor humidity sensor, wherein the outdoor humidity sensor is used to detect outdoor humidity; A controller, wherein the controller is electrically connected to the indoor temperature sensor, the temperature sensor inside the air outlet cavity, the outdoor humidity 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 to work, the indoor temperature and the temperature inside the air outlet cavity are judged, as well as the difference between the outdoor humidity and the first humidity threshold value. When the indoor temperature is not lower than the temperature inside the air outlet cavity, the fresh air heating module is controlled to be turned off; when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than the first humidity threshold value, the fresh air heating module is controlled to selectively operate at different powers; When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the controller is configured to: When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold and less than a second humidity threshold, controlling the fresh air heating module to operate at a first power; When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a second humidity threshold, the fresh air heating module is controlled to operate at a second power, wherein the second power is greater than the first power.

2. The air conditioner according to claim 1, characterized in that: The controller is further configured to control the fresh air heating module to be turned off when the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is not greater than a first humidity threshold.

3. The air conditioner according to claim 1, characterized in that: The first humidity threshold is H1, and H1 satisfies the relationship: 25%RH≤H1≤35%RH.

4. The air conditioner according to claim 1, characterized in that: The second humidity threshold is H2, and H2 satisfies the relationship: 75%RH≤H2≤85%RH.

5. A method for controlling fresh air heating of an air conditioner, applicable to the air conditioner according to any one of claims 1 to 4, characterized in that: include: The air conditioner is turned on and the fresh air module starts to work, and the indoor temperature and the temperature inside the air outlet cavity are determined, and the difference between the outdoor humidity and the first humidity threshold is determined; When the indoor temperature is not lower than the temperature inside the air outlet cavity, the fresh air heating module is turned off; When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the fresh air heating module selectively operates at different powers.

6. The fresh air heating control method of the air conditioner according to claim 5, characterized in that: When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the fresh air heating module selectively operates at different powers, further comprising: When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold and less than a second humidity threshold, the fresh air heating module operates at a first power.

7. The fresh air heating control method of the air conditioner according to claim 6, characterized in that: When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a first humidity threshold, the fresh air heating module selectively operates at different powers, further comprising: When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is greater than a second humidity threshold, the fresh air heating module operates at a second power, wherein the second power is greater than the first power.

8. The fresh air heating control method of the air conditioner according to claim 5, characterized in that: After determining the size of the indoor temperature and the temperature inside the air outlet cavity, and determining the size between the outdoor humidity and the first humidity threshold, the method further includes: When the indoor temperature is lower than the temperature inside the air outlet cavity and the outdoor humidity is not greater than a first humidity threshold, the fresh air heating module is turned off.

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