Air conditioner and control method of air conditioner

Abstract

The application discloses an air conditioner and a control method thereof. The air conditioner comprises a shell, a heat exchanger, a heat exchanger fan, a fresh air volute, a fresh air fan, a mixed air cavity shell connected with the shell and arranged at a position close to a heat exchange air outlet of the mixed air cavity shell, at least one end of the mixed air cavity shell connected with a fresh air outlet, a mixed air inlet and a mixed air outlet arranged on the mixed air cavity shell, the mixed air inlet arranged on one side of the mixed air cavity shell close to the heat exchange air outlet, the mixed air outlet arranged on the other side of the mixed air cavity shell away from the heat exchange air outlet, a mixed air temperature sensor arranged in the mixed air cavity shell and used for detecting a temperature value of air flow in the mixed air cavity shell, and a controller configured to control the heat exchanger fan to start running and the fresh air fan to stop running, so that part of the heat exchange air flow enters the mixed air cavity shell through the mixed air inlet, and the mixed air outlet is closed or opened at a small angle.

Description

Technical Field

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

[0002] With the advancement of technology and the improvement of people's living standards, people are increasingly pursuing smart and healthy lifestyles. Traditional air conditioners that only provide heating and cooling (including dehumidification) functions are gradually failing to meet user needs. Moreover, most traditional air conditioners use closed-circulation airflow. Long-term closed-circulation airflow is prone to breeding bacteria, which to a certain extent affects user health and well-being, for example, may cause symptoms such as colds and air-conditioning sickness. Therefore, how to ensure indoor air quality and meet user comfort requirements while using air conditioners for heating or cooling has gradually become an important research direction.

[0003] The temperatures of fresh air and air-conditioned air are opposite. "Hot air in summer and cold air in winter" is a pain point for users of many models of fresh air air conditioners. When the temperature difference between indoor and outdoor environments is large, the temperature of fresh air is significantly different from the indoor temperature. Therefore, when the fresh air is turned on, users will feel two airflows of different temperatures, which will cause obvious discomfort and reduce the user experience.

[0004] In the related art, existing fresh air mixed air air conditioners can improve the freshness of indoor air, but the cooling / heating between fresh air and conditioned air in the fresh air chamber is insufficient, which can easily cause large fluctuations in indoor temperature and cause human discomfort. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an air conditioner that fully mixes the cooling or heating fresh air with the heat exchange air before releasing it into the room, achieving a constant temperature fresh air effect, avoiding large indoor temperature fluctuations, and effectively improving user comfort.

[0006] The invention also provides a control method for the air conditioner.

[0007] The air conditioner according to the first embodiment of the present invention comprises: a shell, provided with a heat exchange air inlet and a heat exchange air outlet; a heat exchanger, arranged inside the shell; a heat exchange fan, arranged inside the shell, and the heat exchange air flow formed by the heat exchange of the heat exchanger is output outward from the heat exchange air outlet under the operation drive of the heat exchange fan; a fresh air volute, arranged in the shell, one end of which is provided with a fresh air mixed air inlet, and the other end is provided with a fresh air mixed air outlet; the fresh air fan is arranged inside the fresh air volute, and the outdoor air is output from the fresh air mixed air outlet to the outside through the fresh air mixed air inlet. The air inlet is introduced into the interior of the fresh air volute, and the fresh air flow is output to the outside through the fresh air mixed air outlet; the air mixing chamber shell is connected to the shell and is arranged on the air mixing chamber shell near the heat exchange air outlet; at least one end of the air mixing chamber shell is connected to the fresh air mixed air outlet, so that part of the air flow transported by the fresh air mixed air outlet enters the interior of the air mixing chamber shell; the air mixing chamber shell is provided with a mixed air inlet and a mixed air outlet, and the mixed air inlet is arranged on one side of the air mixing chamber shell near the heat exchange air outlet, The mixed air outlet is arranged on the side of the mixed air chamber shell away from the heat exchange air outlet; the mixed air temperature sensor is arranged inside the mixed air chamber shell, and is used to detect the temperature value of the air flow in the mixed air chamber shell; the controller is configured to control the heat exchange fan to start and run and the fresh air fan to stop running, open the mixed air inlet, so that part of the heat exchange air flow enters the interior of the mixed air chamber shell from the heat exchange air outlet through the mixed air inlet, and the mixed air outlet is closed or the opening angle is reduced to limit the air outlet of the mixed air outlet amount; after the heat exchange fan starts running, the fresh air fan is controlled to start running again, so that the fresh air flow enters the mixed air cavity shell from the fresh air mixed air outlet and is mixed with the heat exchange air flow contained in the mixed air cavity shell; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold value, the mixed air outlet is controlled to be opened or opened at a larger angle to increase the air outlet volume of the mixed air outlet, wherein the larger the opening angle of the mixed air outlet is, the greater the speed of the fresh air fan is controlled to be.

[0008] According to the air conditioner of the embodiment of the present invention, after the air conditioner is started, the user can instruct the air conditioner to turn on the fresh air mixing function, so that the controller controls the heat exchange fan to start running, and the fresh air fan to stop running, and controls the mixed air outlet to close or open the mixed air outlet at a smaller angle. Under this condition, the mixed air inlet is controlled to open so that the heat exchange airflow enters the mixed air chamber shell, and then the fresh air fan is controlled to restart running so that the fresh air flow and the heat exchange airflow are fully mixed in the mixed air chamber shell. When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than the preset threshold, the mixed air outlet is opened, so that the fresh air that meets the temperature requirements can be released into the room, thereby improving the freshness of the indoor air while achieving the effect of constant temperature fresh air, avoiding the problem of large indoor temperature fluctuations, thereby effectively improving the user's comfort.

[0009] According to some embodiments of the present invention, when the mixed air outlet is fully opened or opened at the maximum angle, the speed of the fresh air fan increases to the highest level; and when the mixed air outlet is fully closed or opened at the minimum angle, the speed of the fresh air fan decreases to the lowest level.

[0010] According to some embodiments of the present invention, the controller is specifically configured to control the opening angle of the mixed air outlet to gradually increase to fully open, and control the speed of the fresh air fan to gradually increase to the highest level when it determines that the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold.

[0011] According to some embodiments of the present invention, the controller is specifically configured to control the mixed air outlet to open or open at a larger angle when it determines that the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than a preset threshold value, so as to increase the air outlet volume of the mixed air outlet; and when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is greater than a preset threshold value, control the mixed air outlet to close or the opening angle to become smaller to limit the air outlet volume of the mixed air outlet, wherein the smaller the opening angle at the mixed air outlet, the smaller the speed of the fresh air fan is controlled.

[0012] According to some embodiments of the present invention, the controller is specifically configured to control the mixed air outlet to open or open at a larger angle to increase the air volume of the mixed air outlet when it determines that the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than a preset threshold value; and when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is greater than a preset threshold value, the opening angle of the mixed air outlet is controlled to gradually become smaller to completely closed, and the speed of the fresh air fan is controlled to gradually decrease to the lowest gear.

[0013] According to some embodiments of the present application, the controller is specifically configured to, when the mixed air outlet is switched from being open to being closed or being open at a smaller angle, control the rotation speed of the fresh air fan to decrease to the lowest gear; and after a time T2, control the heat exchange fan to start running and the fresh air fan to stop running, open the mixed air inlet, so that part of the heat exchange airflow enters the inside of the mixed air casing from the heat exchange outlet through the mixed air inlet, and the mixed air outlet is closed or opened at a smaller angle to limit the air outlet amount of the mixed air outlet; after the heat exchange fan starts running, control the fresh air fan to start running again, so that the fresh air flow enters the mixed air casing from the fresh air outlet and mixes with the heat exchange airflow contained in the mixed air casing; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than a preset threshold value, control the mixed air outlet to be open or open at a larger angle to increase the air outlet amount of the mixed air outlet.

[0014] According to some embodiments of the present application, further comprising: a first mixed air plate rotatably connected at the mixed air inlet, and the opening and closing of the part of the heat exchange airflow flowing out of the heat exchange outlet into the mixed air casing is realized by the rotation of the first mixed air plate; and a second mixed air plate rotatably connected at the mixed air outlet, and the opening and closing of the fresh air flow and / or the heat exchange airflow in the mixed air casing flowing out of the mixed air outlet is realized by the rotation of the second mixed air plate.

[0015] According to the control method of the air conditioner of the second aspect of the present application, the fresh air function of the air conditioner is opened after the air conditioner is started,

[0016] The heat exchange fan starts running and the fresh air fan stops running, the mixed air inlet is opened, so that part of the heat exchange airflow enters the inside of the mixed air casing from the heat exchange outlet through the mixed air inlet, and the mixed air outlet is closed or opened at a smaller angle to limit the air outlet amount of the mixed air outlet; after the heat exchange fan starts running, the fresh air fan starts running again, so that the fresh air flow enters the mixed air casing from the fresh air outlet and mixes with the heat exchange airflow contained in the mixed air casing; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than a preset threshold value, the mixed air outlet is opened or opened at a larger angle to increase the air outlet amount of the mixed air outlet, wherein the larger the opening angle of the mixed air outlet, the greater the rotation speed of the fresh air fan.

[0017] According to some embodiments of the present application, when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than a preset threshold value, the mixed air outlet is controlled to be opened or opened at a larger angle to increase the air volume of the mixed air outlet; and when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is greater than the preset threshold value, the mixed air outlet is controlled to be closed or opened at a smaller angle to limit the air volume of the mixed air outlet, wherein the smaller the opening angle of the mixed air outlet, the smaller the rotating speed of the fresh air fan is controlled.

[0018] According to some embodiments of the present application, when the mixed air outlet is switched from being opened to being closed or opened at a smaller angle, the rotating speed of the fresh air fan is reduced to the lowest gear, and after a time T2, the air conditioner is operated according to the control method of the air conditioner, wherein T2>0.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0021] Figure 1 is a structural schematic diagram of an air conditioner according to an embodiment of the present application;

[0022] Figure 2 is a structural schematic diagram of an air conditioner according to an embodiment of the present application;

[0023] Figure 3 is an air outlet schematic diagram of an air conditioner according to an embodiment of the present application with the heat exchange fan turned on;

[0024] Figure 4 is a partial enlarged schematic diagram of an air conditioner according to an embodiment of the present application with the heat exchange fan turned on;

[0025] Figure 5 is an air outlet schematic diagram of an air conditioner according to an embodiment of the present application with the first mixed air plate opened;

[0026] Figure 6 is a partial enlarged schematic diagram of an air conditioner according to an embodiment of the present application with the first mixed air plate opened;

[0027] Figure 7 is an air outlet schematic diagram of an air conditioner according to an embodiment of the present application with the fresh air fan turned on and the second mixed air plate opened;

[0028] Figure 8is a partial enlarged view of the air conditioner according to the embodiment of the present application opening the fresh air fan and opening the second mixing air baffle;

[0029] Figure 9 is an air outlet schematic view when the rotation speed of the fresh air fan in the air conditioner according to the embodiment of the present application gradually reduces to a low rotation speed and the second mixing air baffle gradually closes;

[0030] Figure 10 is a partial enlarged view when the rotation speed of the fresh air fan in the air conditioner according to the embodiment of the present application gradually reduces to a low rotation speed and the second mixing air baffle gradually closes;

[0031] Figure 11 is a timing flow chart when the air conditioner according to the embodiment of the present application opens the fresh air function;

[0032] Figure 12 is a cooperation schematic view of the rotation speed of the fresh air fan and the opening area of the second mixing air baffle according to the embodiment of the present application.

[0033] Reference signs:

[0034] 100, air conditioner; 10, shell; 11, heat exchange air duct; 12, heat exchanger; 13, heat exchange fan; 14, heat exchange air outlet; 15, heat exchange air baffle; 21, fresh air volute; 22, fresh air fan; 23, mixing air cavity shell; 24, mixing air inlet; 25, mixing air outlet; 26, fresh air mixing air inlet; 27, fresh air mixing air outlet; 30, second mixing air baffle; 40, first mixing air baffle; 50, connecting pipe. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and the embodiments of the present application are described in detail below.

[0036] The embodiments of the present application are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and the embodiments of the present application are described in detail below. Figures 1-12 The air conditioner 100 according to the embodiment of the present application is described below, and the present application also proposes a control method of the air conditioner 100.

[0037] As shown in Figures 1-3 The air conditioner 100 includes a shell 10, a heat exchanger 12, a heat exchange fan 13, a fresh air volute 21 and a fresh air fan 22.

[0038] The housing 10 is provided with a heat exchange inlet (not shown in the drawings) and a heat exchange outlet 14. The heat exchanger 12 and the heat exchange fan 13 are both disposed within the housing 10. The heat exchange airflow formed by heat exchange in the heat exchanger 12 is output outward through the heat exchange outlet 14 under the operation of the heat exchange fan 13. In this way, the operation of the heat exchange fan 13 draws airflow from the exterior of the housing 10 into the interior of the housing 10 through the heat exchange inlet, where it undergoes heat exchange in the heat exchanger 12 to form a heat exchange airflow. The heat exchange airflow is then output outward through the heat exchange outlet 14 under the operation of the heat exchange fan 13, thereby achieving the effect of cooling or heating the indoor airflow to achieve the desired comfortable temperature for the user. In addition, a heat exchange air duct 11 is provided in the heat exchanger 12, and the heat exchange air duct 11 is used for the passage of hot exchange air. The heat exchange air duct 11 corresponds to the heat exchanger 12, and the heat exchange air duct 11 is connected to the heat exchange air outlet 14, so that after the indoor air enters the shell 10, it is heat-exchanged by the heat exchanger 12 to form hot exchange air, and then released into the room through the heat exchange air outlet 14 to achieve the cooling and heating effects of the air conditioner 100.

[0039] In addition, a fresh air volute 21 is arranged in the housing 10, and a fresh air mixed air inlet 26 is arranged at one end of the fresh air volute 21, and a fresh air mixed air outlet 27 is arranged at the other end of the fresh air volute 21. Among them, the fresh air volute 21 is usually arranged at one end of the air conditioner 100 to facilitate the introduction of outdoor fresh air. The fresh air fan 22 is arranged inside the fresh air volute 21, and introduces the outdoor air flow into the fresh air volute 21 through the fresh air mixed air inlet 26, and outputs the fresh air flow outward through the fresh air mixed air outlet 27. In this way, the outdoor air flow is introduced into the fresh air volute 21 through the fresh air mixed air inlet 26 through the driving operation of the fresh air fan 22, and the fresh air fan 22 filters the incoming fresh air flow and outputs the fresh air flow outward through the fresh air mixed air outlet 27, which can improve the freshness of the indoor air and achieve the fresh air effect of the air conditioner 100.

[0040] In addition, the air conditioner 100 further includes: an air mixing chamber housing 23, a first air mixing plate 40, a second air mixing plate 30, an air mixing temperature sensor (not shown in the drawings) and a controller (not shown in the drawings).

[0041] The air mixing chamber housing 23 is connected to the housing 10 and is disposed adjacent to the heat exchange outlet 14. At least one end of the air mixing chamber housing 23 is connected to the fresh air mixed air outlet 27, so that a portion of the airflow delivered by the fresh air mixed air outlet 27 enters the interior of the air mixing chamber housing 23. Furthermore, an air mixing inlet 24 and an air mixing outlet 25 are disposed on the air mixing chamber housing 23. The air mixing inlet 24 is disposed on a side of the air mixing chamber housing 23 adjacent to the heat exchange outlet 14, and the air mixing outlet 25 is disposed on a side of the air mixing chamber housing 23 away from the heat exchange outlet 14. In this way, a mixed air inlet 24 is provided on the side of the mixed air chamber shell 23 adjacent to the heat exchange air outlet 14, so that part of the mixed air flow can enter the mixed air chamber shell 23 through the mixed air inlet 24, and the mixed air chamber shell 23 is also connected with the fresh air mixed air outlet 27 of the fresh air volute 21, so that the fresh air flow can enter the mixed air chamber shell 23. When the fresh air flow and the heat exchange air flow enter the mixed air chamber shell 23 and are mixed, the effect of constant temperature fresh air can be achieved. In this way, the temperature of the mixed air flow blown out from the mixed air outlet 25 is not much different from the indoor temperature, which can effectively improve the problem of large indoor temperature fluctuations caused by the introduction of fresh air.

[0042] By controlling the opening and closing of the mixed air outlet 25 and the mixed air inlet 24 , different air outlet modes can be achieved.

[0043] For example, when the heat exchange fan 13 is turned on and the mixed air inlet 24 is closed, the heat exchange airflow cannot enter the mixed air chamber housing 23, so the heat exchange airflow can be blown out from the heat exchange air outlet 14, and the air conditioner 100 operates in the heat exchange air mode; and / or when the fresh air fan 22 is turned on and the mixed air outlet 25 is opened, the fresh air flow can be blown out from the mixed air outlet 25, and the air conditioner 100 operates in the fresh air mode. In this case, the heat exchange mode and the fresh air mode operate independently.

[0044] For another example, when the heat exchange fan 13 is turned on and the mixed air inlet 24 is opened, under the operation of the heat exchange fan 13, part of the heat exchange air flow can enter the mixed air chamber shell 23 from the mixed air inlet 24. In this case, the fresh air fan 22 can be turned on to allow the fresh air flow to also enter the mixed air chamber shell 23, so as to achieve the mixing of the fresh air flow and the heat exchange air flow. Then, the mixed air outlet 25 is opened to release the mixed air flow of the fresh air flow and the heat exchange air flow into the room, that is, the air conditioner 100 operates in the fresh air mixed air mode, which can achieve a constant temperature on the one hand. As for the effect of fresh air, the temperature of the mixed air flow is very close to the indoor temperature, which improves the problem of large indoor temperature fluctuations caused by the introduction of fresh air; on the other hand, the large amount of hot air generated by the heat exchanger 12 will make the air pressure in the heat exchange duct 11 relatively high, and then opening the mixed air inlet 24 can form a significant difference with the air pressure in the mixed air chamber shell 23, so that a large amount of hot air is conducive to quickly entering the mixed air chamber shell 23, so that after the fresh air fan 22 is turned on, it is fully mixed with the fresh air in the mixed air chamber shell 23, and the effect of constant temperature fresh air is better.

[0045] Further, the mixed air temperature sensor is arranged inside the mixed air cavity 23 for detecting the temperature value of the air flow in the mixed air cavity 23. In this way, when the fresh air flow and the heat exchange air flow both enter the mixed air cavity 23 for mixing, the mixed air temperature sensor is used to detect whether the temperature value of the mixed air flow meets the indoor temperature requirement, and the mixed air outlet 25 is opened only when the indoor temperature requirement is met, so that the blown air flow meets the comfort requirement of the human body, effectively preventing the fresh air from being directly blown out from the mixed air outlet 25 without being fully mixed with the heat exchange air, resulting in a large difference between the temperature of the fresh air released into the room and the indoor temperature, causing the user's physical discomfort.

[0046] In combination with FIGS. 1-3, Figure 11 and Figure 12 As shown, the controller is configured to control the heat exchange air fan 13 to start running, and the fresh air fan 22 to stop running, and open the mixed air inlet 24, so that part of the heat exchange air flow enters the inside of the mixed air cavity 23 from the heat exchange outlet 14 through the mixed air inlet 24, and control the mixed air outlet 25 to be closed or to reduce the opening angle, so as to limit the air volume of the mixed air outlet 25; after the heat exchange air fan 13 starts running, control the fresh air fan 22 to start running again, so that the fresh air flow enters the mixed air cavity 23 from the fresh air mixed air outlet 27, and mixes with the heat exchange air flow contained in the mixed air cavity 23; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold value, control the mixed air outlet 25 to be opened or opened at a larger angle, so as to increase the air volume of the mixed air outlet 25, wherein the larger the opening angle of the mixed air outlet 25, the greater the rotating speed of the fresh air fan 22.

[0047] That is, in the running of the air conditioner 100, if the fresh air mixed air function needs to be run, the controller controls the heat exchange air fan 13 to start running, and the fresh air fan 22 to stop running, so that the heat exchange air flow is generated under the rotation of the heat exchange air fan 13, and the mixed air inlet 24 is opened, at this time, the air pressure in the mixed air cavity 23 is lower than the air pressure in the heat exchange air duct 11, so that the heat exchange air flow can quickly enter the mixed air cavity 23. It should be noted that in this process, the mixed air outlet 25 is in a closed state or the opening angle of the mixed air outlet 25 is reduced, so as to limit the air volume of the mixed air outlet 25. Then, after the heat exchange air fan 13 starts running, the fresh air fan 22 is controlled to start running again, so that the fresh air flow can enter the mixed air cavity 23 from the fresh air mixed air outlet 27, and mix with the heat exchange air flow entering the mixed air cavity 23. In this way, since the mixed air outlet 25 is in a closed state or the opening angle of the mixed air outlet 25 is reduced, it can be ensured that the heat exchange air flow and the fresh air flow entering the mixed air cavity 23 are fully mixed.

[0048] Furthermore, the mixed air temperature sensor detects the mixed air temperature within the mixed air chamber housing 23. When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold, it indicates that the mixed air flow has met the indoor temperature condition. At this time, the mixed air outlet 25 is controlled to open or open the mixed air outlet 25 at a larger angle, allowing the mixed air flow to be released into the room through the mixed air outlet 25. In this way, the mixed air flow that meets the indoor temperature requirement can be released into the room, meeting the human comfort requirement and solving the problem of large indoor temperature fluctuations caused by insufficient cooling or heating between the fresh air and the heated air in the mixed air chamber housing 23.

[0049] Among them, after the mixed air outlet 25 is opened, the larger the opening angle of the mixed air outlet 25, the larger the speed of the fresh air fan 22 is controlled to be. Similarly, the smaller the opening angle of the mixed air outlet 25, the smaller the speed of the fresh air fan 22 is controlled to be. It can be understood that when the opening angle of the mixed air outlet 25 gradually increases, the speed of the fresh air fan 22 gradually increases, which can speed up the efficiency of the mixed air of fresh air and heat exchange air blowing into the room, so that the mixed air flow can be quickly released into the room. Conversely, when the opening angle of the mixed air outlet 25 gradually decreases, the speed of the fresh air fan 22 gradually decreases accordingly, which can slow down the efficiency of the mixed air of fresh air and heat exchange air blowing into the room. In this way, the effect of constant temperature fresh air can be achieved, and the output efficiency of the fresh air fan 22 can be optimized, thereby avoiding power loss of the fresh air fan 22.

[0050] Therefore, after the air conditioner 100 is started, the user can instruct the air conditioner 100 to turn on the fresh air mixing function, so the controller controls the heat exchange fan 13 to start running, and the fresh air fan 22 to stop running, and closes the mixed air outlet 25 or opens the mixed air outlet 25 at a smaller angle. Under this condition, the controller controls the mixed air inlet 24 to open or open at a larger angle to allow the heat exchange air flow to enter the mixed air chamber shell 23, and then controls the fresh air fan 22 to restart running so that the fresh air flow and the heat exchange air flow are fully mixed in the mixed air chamber shell 23. When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than the preset threshold, the mixed air outlet 25 is opened, so that the fresh air that meets the temperature requirements can be released into the room, thereby improving the freshness of the indoor air while achieving the effect of constant temperature fresh air, avoiding the problem of large indoor temperature fluctuations, thereby effectively improving the user's comfort.

[0051] Furthermore, when the mixed air outlet 25 is fully opened or at its maximum opening angle, the speed of the fresh air fan 22 increases to the highest gear; and when the mixed air outlet 25 is fully closed or at its minimum opening angle, the speed of the fresh air fan 22 decreases to the lowest gear. Thus, as the opening angle of the mixed air outlet 25 gradually increases, the speed of the fresh air fan 22 gradually increases, thereby accelerating the efficiency of the mixed air flow blowing into the room. Furthermore, when the mixed air outlet 25 is fully opened or at its maximum opening angle, the speed of the fresh air fan 22 reaches its highest gear. Driven by the operation of the fresh air fan 22, the mixed air flow release efficiency is maximized, allowing users to fully experience the freshness of the indoor air. At the same time, the release rate of the mixed air flow is maximized, allowing the mixed air flow to be quickly released into the room. On the contrary, when the opening angle of the mixed air outlet 25 gradually decreases, the rotation speed of the fresh air fan 22 gradually decreases, which can slow down the efficiency of the mixed air of fresh air and heat exchange air blowing into the room, and when the mixed air outlet 25 is completely closed or the opening angle is the smallest, the rotation speed of the fresh air fan 22 is the smallest, which can not only achieve the effect of constant temperature fresh air, but also optimize the output efficiency of the fresh air fan 22 to avoid power loss.

[0052] Furthermore, the controller is specifically configured to control the opening angle of the mixed air outlet 25 to gradually increase to fully open when it determines that the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than a preset threshold, and control the rotation speed of the fresh air fan 22 to gradually increase to the highest gear. In this way, when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than the preset threshold, the mixed air flow release condition is met. At this time, the mixed air outlet 25 is controlled to gradually open to the maximum value. At the same time, the rotation speed of the fresh air fan 22 is gradually increased to the highest gear, so that the air volume of the mixed air flow gradually increases to the maximum value, so that the mixed air flow is quickly released into the room, and the user can gradually feel the freshness of the indoor air, which has a good effect of purifying the indoor air. The user will not feel the fresh air suddenly, but will experience it slowly, thereby improving the user's comfort experience and making the output power of the fresh air fan 22 reach a better state.

[0053] Furthermore, the controller is specifically configured to control the heat exchange fan 13 to start running, and the fresh air fan 22 to stop running, open the mixed air inlet 24, so that part of the heat exchange air flow enters the interior of the mixed air chamber shell 23 from the heat exchange air outlet 14 through the mixed air inlet 24, close the mixed air outlet 25 or reduce the opening angle of the mixed air outlet 25 to limit the air outlet volume of the mixed air outlet 25; and after time T1, control the fresh air fan 22 to start running again, so that the fresh air flow enters the mixed air chamber shell 23 from the fresh air mixed air outlet 27 and mixes with the heat exchange air flow contained in the mixed air chamber shell 23, T1>0.

[0054] That is to say, after the heat exchange airflow enters the air mixing chamber shell 23, after time T1, the controller controls the fresh air fan 22 to start again, so that the fresh air and the heat exchange air are fully mixed in the air mixing chamber shell 23. In this way, a certain amount of heat exchange airflow can first enter the air mixing chamber shell 23, so that the heat exchange air in the air mixing chamber shell 23 reaches a reasonable space share. Then, after time T1, the fresh air fan 22 is turned on, so that the generated fresh air flow enters the air mixing chamber shell 23 from the fresh air mixed air outlet 27 of the fresh air volute 21, and is fully mixed with a certain proportion of heat exchange air in the air mixing chamber shell 23. In this way, the mixing ratio between the fresh air and the heat exchange air can be well controlled to achieve a good constant temperature effect on the fresh air.

[0055] If the heat exchange fan 13 and the fresh air fan 22 are turned on at the same time, although the heat exchange air can enter the mixed air chamber shell 23 from the mixed air inlet 24, and the fresh air can enter the mixed air chamber shell 23 from the fresh air mixed air outlet 27 of the fresh air volute 21, the proportion of fresh air and heat exchange air in the mixed air chamber shell 23 cannot be well controlled, which may cause the proportion of fresh air in the mixed air chamber shell 23 to be greater than the proportion of heat exchange air in the mixed air chamber shell 23, thereby affecting the effect of constant temperature fresh air and failing to effectively reduce the difference between the fresh air temperature and the indoor temperature.

[0056] Furthermore, the interval between the entry of the heat exchange airflow into the air mixing chamber 23 and the activation of the fresh air blower 22 can be set within 4 to 6 seconds, so that the fresh air and the heat exchange air form a reasonable ratio within the air mixing chamber 23, thereby allowing the fresh air and the heat exchange air to be fully mixed, achieving a good constant-temperature fresh air effect. If the interval is too short, the amount of heat exchange air entering the air mixing chamber 23 may be too small, and the difference between the fresh air temperature and the indoor temperature may not be effectively reduced. Conversely, if the interval is too long, the amount of heat exchange air entering the air mixing chamber 23 may be too large. Although the effect of constant-temperature fresh air can be achieved, the amount of fresh air discharged will be too small, and the indoor air purification effect may not be effectively achieved.

[0057] Therefore, after the heated air enters the air mixing chamber 23, the fresh air fan 22 is activated after time T1 has passed. This allows the fresh air and heated air to be fully mixed within the air mixing chamber 23, effectively maintaining a constant temperature for the fresh air and alleviating the problem of large indoor temperature fluctuations. Of course, the aforementioned interval can be designed based on the rotational speeds of the heat exchange fan 13 and the fresh air fan 22, as well as other relevant factors such as the opening area of ​​the mixed air inlet 24 and the mixed air outlet 25, to ensure that the fresh air and heated air are fully mixed within the air mixing chamber 23, achieving a constant temperature for the fresh air while ensuring a good fresh air purification effect. That is, time T1 is not specifically limited.

[0058] Further, the controller is specifically configured to control the mixed air outlet 25 to open or open at a larger angle to increase the air volume of the mixed air outlet 25 when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than a preset threshold; and control the mixed air outlet 25 to close or open at a smaller angle to limit the air volume of the mixed air outlet 25 when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is greater than the preset threshold, wherein the smaller the opening angle of the mixed air outlet 25, the smaller the rotating speed of the fresh air fan 22 is controlled. In this way, when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than the preset threshold, the mixed air outlet 25 is controlled to open or open at a larger angle, so that the mixed air flow meeting the temperature condition is quickly released to the indoor, and when the mixed air flow is released for a certain time and the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is greater than the preset threshold, it indicates that the mixed air flow at this time is greatly different from the indoor temperature, which is easy to cause the indoor temperature fluctuation problem, at this time, the mixed air outlet 25 is controlled to close or the opening angle of the mixed air outlet 25 is reduced, so that the air volume of the mixed air flow can be reduced to ensure that the fresh air mixed air released to the indoor meets the comfort requirements of the human body.

[0059] Further, the controller is specifically configured to control the mixed air outlet 25 to open or open at a larger angle to increase the air volume of the mixed air outlet 25 when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than a preset threshold; and control the mixed air outlet 25 to close or open at a smaller angle to limit the air volume of the mixed air outlet 25 when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is greater than the preset threshold, wherein the smaller the opening angle of the mixed air outlet 25, the smaller the rotating speed of the fresh air fan 22 is controlled. In this way, when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than the preset threshold, the mixed air outlet 25 is controlled to open or open at a larger angle, so that the mixed air flow meeting the temperature condition is quickly released to the indoor, and when the mixed air flow is released for a certain time and the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is greater than the preset threshold, it indicates that the mixed air flow at this time is greatly different from the indoor temperature, which is easy to cause the indoor temperature fluctuation problem, at this time, the mixed air outlet 25 is controlled to close or the opening angle of the mixed air outlet 25 is reduced, so that the air volume of the mixed air flow can be reduced to ensure that the fresh air mixed air released to the indoor meets the comfort requirements of the human body.

[0060] And, the controller is specifically configured to control the rotation speed of the fresh air fan 22 to the lowest gear when the mixed air outlet 25 is switched from opening to closing or opening at a smaller angle; and after a time T2, control the heat exchange fan 13 to start running, and the fresh air fan 22 to stop running, open the mixed air inlet 24 to make part of the heat exchange airflow from the heat exchange outlet 14 enter the inside of the mixed air cavity 23 through the mixed air inlet 24, and the mixed air outlet 25 to be closed or open at a smaller angle to limit the air volume of the mixed air outlet 25; the controller is configured to control the fresh air fan 22 to start running again after the heat exchange fan 13 starts running, so that the fresh air flow enters the mixed air cavity 23 from the fresh air mixed air outlet 27 and mixes with the heat exchange airflow contained in the mixed air cavity 23; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than the preset threshold value, open or open at a larger angle the mixed air outlet 25 to increase the air volume of the mixed air outlet 25.

[0061] That is, after the mixed air outlet 25 is opened, the mixed air flow with indoor temperature is released from the mixed air outlet 25 to the indoor, and when it is released for a certain time, the mixed air cavity 23 is not closed because the mixed air outlet 25 of the mixed air cavity 23 is in an open state, so that the fresh air flow and the heat exchange airflow entering the mixed air cavity 23 cannot be fully mixed, so that the temperature of the mixed air flow cannot meet the indoor temperature condition, that is, when the difference between the detected mixed air temperature value and the user set temperature value is greater than the preset threshold value, the mixed air outlet 25 is closed or the opening angle is reduced, so that after the mixed air outlet 25 is closed or the opening angle is reduced, a new air mixed air outlet period is completed, that is, “heat exchange airflow enters mixed air cavity 23-new air flow enters mixed air cavity 23 and mixes with heat exchange airflow-open mixed air outlet 25-close mixed air outlet 25”, and then after a time T2, re-enter the next cycle period, the controller controls the heat exchange fan 13 to start running again, and the fresh air fan 22 to stop running again, closes or reduces the mixed air outlet 25, and opens the mixed air inlet 24 to make part of the heat exchange airflow from the heat exchange outlet 14 enter the inside of the mixed air cavity 23 through the mixed air inlet 24; then control the fresh air fan 22 to start running again to make the fresh air flow enter the mixed air cavity 23 from the fresh air mixed air outlet 27 and mix with the heat exchange airflow contained in the mixed air cavity 23; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than the preset threshold value, open the mixed air outlet 25 to increase the air volume of the mixed air outlet 25.

[0062] Thus, the interval time T2 (T2>0) is set between the last air-out period and the next air-out period, so that the fresh air mixing is intermittent air-out instead of continuous air-out. On the one hand, the fresh air can be released to the indoor when the mixing temperature value of the fresh air and the heat exchange air flow meets the requirement, which can well ensure the air-out temperature quality of the fresh air mixing. On the other hand, the mixed air flow meeting the release condition can be continuously released to the indoor, which improves the freshness of the indoor air and achieves the effect of constant temperature fresh air, avoiding the problem of large indoor temperature fluctuation, thereby effectively improving the comfort of the user. In the continuous periodical cycle, the controller controls the first mixing plate 40 to rotate to the rear of the mixing air inlet 24, which can be in an open state all the time, and controls the heat exchange fan 13 to be in a normal running state all the time, which can reduce the repeated rotation of the first mixing plate 40 and the repeated start of the heat exchange fan 13, and at the same time can ensure that the refrigeration or heating mode is always running.

[0063] Further, the controller is specifically configured to control the mixing air outlet 25 to be closed or opened at a smaller angle after a time T3 after the mixing air outlet 25 is opened or opened at a larger angle, wherein T3>0. That is, after the mixing air outlet 25 is opened, the mixing air outlet 25 is closed or opened at a smaller angle after a time T3, which can ensure that the mixed air flow meeting the indoor temperature requirement is blown to the indoor within the time T3. If the mixing air outlet 25 is not closed after being opened, the fresh air flow introduced from the fresh air volute 21 into the mixing air chamber 23 and the part of the heat exchange air flow introduced from the heat exchange air duct 11 into the mixing air chamber 23 cannot be mixed to the appropriate temperature in the mixing air chamber 23, and will be released to the indoor, which cannot achieve the effect of constant temperature fresh air.

[0064] In the time period from the opening of the mixing air outlet 25 to the closing of the mixing air outlet 25 or the opening at a smaller angle, a large amount of mixed air flow of fresh air and heat exchange air can be blown to the indoor. At this time, the rotation speed of the fresh air fan 22 is increased to the maximum value, so that the user can intuitively feel the effect of fresh air purification and constant temperature fresh air, effectively improving the experience comfort of the user, and ensuring that a large amount of mixed air is continuously and effectively blown out in this time period.

[0065] As Figure 2 and Figure 3As shown, the air mixing system further includes: a first air mixing plate 40 and a second air mixing plate 30. The first air mixing plate 40 is rotatably connected to the air mixing inlet 24. The rotation of the first air mixing plate 40 enables on-off control of the flow of a portion of the heat exchange airflow flowing out of the heat exchange air outlet 14 into the air mixing chamber shell 23. In this way, the rotation of the first air mixing plate 40 can open or close the air mixing inlet 24, allowing the heat exchange airflow to selectively enter the air mixing chamber shell 23 from the air mixing inlet 24. In addition, the second air mixing plate 30 is rotatably connected to the air mixing outlet 25. The rotation of the second air mixing plate 30 enables on-off control of the flow of fresh air and / or heat exchange airflow in the air mixing chamber shell 23 out of the air mixing outlet 25. In this way, by rotating the second air mixing plate 30, the mixed air outlet 25 can be opened or closed, so that the fresh air flow or the heat exchange air flow or the mixed air flow of the fresh air flow and the heat exchange air flow in the air mixing chamber shell 23 can be selectively blown out of the shell 10 from the mixed air outlet 25.

[0066] In addition, the air mixing chamber housing 23 extends in the longitudinal direction of the air conditioner 100; and / or the air mixing inlet 24 is configured in an elongated shape, and the length of the air mixing inlet 24 in the longitudinal direction of the air conditioner 100 is less than the width of the heat exchanger 12 in the longitudinal direction of the air conditioner 100; and / or the air mixing outlet 25 is configured in an elongated shape, and the length of the air mixing outlet 25 in the longitudinal direction of the air conditioner 100 is less than the length of the heat exchanger 12 in the longitudinal direction of the air conditioner 100. In this configuration, the air mixing chamber housing 23 is configured in an elongated shape to match the heat exchanger 12 or the heat exchange duct 11. This allows the heated air in the heat exchange duct 11 to evenly enter the air mixing chamber housing 23 and be fully mixed with the fresh air entering the air mixing chamber housing 23, thereby improving the mixing efficiency of the fresh air and the heated air.

[0067] In addition, the mixed air inlet 24 is constructed into a long strip shape and is reasonably set up. Since the mixed air chamber shell 23 is extended in the length direction of the air conditioner 100, the long strip mixed air inlet 24 can be adapted to the mixed air chamber shell 23, so that the heat exchange air is blown from the mixed air inlet 24 to the mixed air chamber shell 23, so that the wind resistance of the heat exchange air entering the mixed air chamber shell 23 is small and the heat exchange air volume is large. After the mixed air inlet 24 is opened, a large amount of heat exchange air can quickly enter the mixed air chamber shell 23. Specifically, setting the length of the mixed air inlet 24 shorter than the length of the heat exchanger 12 can effectively meet the requirement of a certain amount of heat exchange air entering the mixed air chamber housing 23 through the mixed air inlet 24. If the length of the mixed air inlet 24 is longer than the length of the heat exchanger 12, on the one hand, more heat exchange air will easily enter the mixed air chamber housing 23, resulting in a smaller amount of heat exchange air blown out from the heat exchange air outlet 14, thus changing the air conditioner 100's primary air outlet mode of heat exchange air. On the other hand, a larger mixed air inlet 24 causes unnecessary waste and is not conducive to forming a certain pressure difference between the mixed air chamber housing 23 and the heat exchange air duct 11.

[0068] Furthermore, the mixed air outlet 25 is constructed in an elongated strip shape, with its length being shorter than that of the heat exchanger 12. This configuration allows the elongated shape of the mixed air outlet 25 to fit snugly within the air mixing chamber housing 23, allowing fresh air to be fully mixed with the heat exchanged air within the air mixing chamber housing 23 before being evenly released from the mixed air outlet 25 into the room. Furthermore, the elongated shape of the mixed air outlet 25 effectively increases the horizontal air delivery range of the fresh air, facilitating its rapid diffusion throughout the room. Furthermore, the user can intuitively see the mixed air outlet 25, effectively enhancing the visualization of the fresh air. This provides the air conditioner 100 with a distinct and differentiated appearance when the fresh air mode is engaged. Furthermore, while ensuring the effective delivery of fresh air, the length of the mixed air outlet 25 is shorter than that of the heat exchanger 12. This arrangement is reasonable and consistent with the placement of the mixed air outlet 25 on the fresh air volute 21. Furthermore, it allows for sufficient mixing of the fresh air and the heated air, reducing the difference between the fresh air temperature and the indoor temperature. If the length of the mixed air outlet 25 were longer than the length of the heat exchange duct 11, the fresh air temperature would not be effectively regulated after mixing with the heated air. In other words, the air conditioner 100 forms an air delivery pattern that primarily utilizes the heat exchange duct 11, supplemented by the mixed air outlet 25.

[0069] In addition, a main fresh air outlet is provided at the lower end of the fresh air volute 21, and one end of the air mixing chamber housing 23 is connected to the main fresh air outlet. In other words, the fresh air is gathered and accelerated in the fresh air volute 21, and then blown from the main fresh air outlet on the fresh air volute 21 to the air mixing chamber housing 23, and finally blown out from the mixed air outlet 25. This prevents the fresh air from passing through other outlet ducts, thus preventing fresh air attenuation. In other words, the fresh air output volume and speed are greater.

[0070] Furthermore, the air conditioner 100 further includes a connecting pipe 50, one end of which is connected to the fresh air volute 21 and the other end of which is connected to the air mixing chamber housing 23. The connecting pipe 50 is bent. With this arrangement, since the fresh air module 20 has a volute structure, the connecting pipe 50 is designed as a bent structure, which allows the air mixing chamber housing 23 to be well connected to the fresh air module 20 through the connecting pipe 50. In this way, outdoor air enters the fresh air module 20, is filtered by the fresh air module 20, and then is blown out of the air outlet 2 through the connecting pipe 50 and the air mixing chamber housing 23 in sequence. The cross-sectional area of ​​the end of the connecting pipe 50 connected to the fresh air volute 21 is smaller than the cross-sectional area of ​​the end of the connecting pipe 50 connected to the air mixing chamber housing 23. That is to say, the connecting pipe 50 is gradually expanding in the connecting direction from the fresh air volute 21 to the mixed air chamber shell 23. In this way, when the fresh air generated in the fresh air volute 21 passes through the connecting pipe 50, the airflow rate of the fresh air can be reduced, so that the fresh air can slowly enter the mixed air chamber shell 23 and be fully mixed with the heat exchange air, and finally be blown out evenly from the mixed air outlet 25, thereby making the fresh air and the heat exchange air more evenly mixed, so as to achieve the effect of improving the fresh air temperature.

[0071] According to the control method of the air conditioner 100 of the second embodiment of the present invention, after the air conditioner 100 is started, the user can choose to turn on the fresh air mixing function of the air conditioner 100, the heat exchange fan 13 starts to run, and the fresh air fan 22 stops running, and the mixed air inlet 24 is opened to allow part of the heat exchange air flow to enter the interior of the mixed air chamber shell 23 from the heat exchange air outlet 14 through the mixed air inlet 24, and the mixed air outlet 25 is closed or opened at a smaller angle to limit the air output of the mixed air outlet 25; After the fan 13 starts running, the fresh air fan 22 starts running again, and the fresh air flow enters the mixed air chamber shell 23 from the fresh air mixed air outlet 27 and mixes with the heat exchange air flow contained in the mixed air chamber shell 23; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than the preset threshold value, the mixed air outlet 25 opens or opens at a larger angle to increase the air outlet volume of the mixed air outlet 25, wherein the larger the opening angle at the mixed air outlet 25, the greater the rotation speed of the fresh air fan 22.

[0072] That is to say, when the air conditioner 100 is running, the user instructs to turn on the fresh air mixing function, then the heat exchange fan 13 starts running, and the fresh air fan 22 stops running, and the mixed air inlet 24 is opened, so that a heat exchange airflow is generated under the rotation of the heat exchange fan 13. At this time, the air pressure in the mixed air chamber shell 23 is lower than the air pressure in the heat exchange air duct 11, so that the heat exchange airflow can quickly enter the mixed air chamber shell 23 through the mixed air inlet 24. It should be noted that during this process, the mixed air outlet 25 is in a closed state or the opening angle of the mixed air outlet 25 is reduced, which can limit the air output of the mixed air outlet 25. After the heat exchange fan 13 starts operating, the fresh air fan 22 starts operating again. This allows fresh air to enter the air mixing chamber 23 from the fresh air mixed air outlet 27 and mix with the heat exchange air entering the air mixing chamber 23. Since the mixed air outlet 25 is closed or its opening angle is reduced, sufficient mixing of the heat exchange air and fresh air entering the air mixing chamber 23 is ensured. Furthermore, a mixed air temperature sensor within the air mixing chamber 23 detects the mixed air temperature within the air mixing chamber 23. When the difference between the detected mixed air temperature and the user-set temperature is less than a preset threshold, the mixed air flow meets the indoor temperature requirement. At this point, the mixed air outlet 25 is controlled to open, allowing the mixed air flow to be released from the mixed air outlet 25 into the room. This allows mixed air that meets the indoor temperature requirement to be released into the room, meeting human comfort requirements and resolving the issue of large indoor temperature fluctuations caused by insufficient cooling or heating between the fresh air and the heat exchange air within the air mixing chamber 23.

[0073] Moreover, after the mixed air outlet 25 is opened, the larger the opening angle of the mixed air outlet 25 is, the higher the speed of the controlled fresh air fan 22 is. Similarly, the smaller the opening angle of the mixed air outlet 25 is, the smaller the speed of the controlled fresh air fan 22 is. It can be understood that when the opening angle of the mixed air outlet 25 is gradually increased, the speed of the fresh air fan 22 is gradually increased, which can speed up the efficiency of the mixed air of the fresh air and the heat exchange air being blown into the room, so that the mixed air flow can be quickly released into the room. Conversely, when the opening angle of the mixed air outlet 25 is gradually decreased, the speed of the fresh air fan 22 is correspondingly decreased, which can slow down the efficiency of the mixed air of the fresh air and the heat exchange air being blown into the room. In this way, the effect of constant temperature fresh air can be achieved, and the output efficiency of the fresh air fan 22 can be optimized, thereby avoiding power loss of the fresh air fan 22.

[0074] Further, when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than a preset threshold value, the mixed air outlet 25 is controlled to be opened or opened at a larger angle to increase the air volume of the mixed air outlet 25; and when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is greater than the preset threshold value, the mixed air outlet 25 is controlled to be closed or opened at a smaller angle to limit the air volume of the mixed air outlet 25, wherein the smaller the opening angle of the mixed air outlet 25, the smaller the control speed of the fresh air fan 22.

[0075] In this way, when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is less than a preset threshold value, the mixed air outlet 25 is controlled to be opened or opened at a larger angle, so that the mixed air flow meeting the temperature condition is quickly released to the indoor, and when the mixed air flow is released for a certain time and the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user set temperature value is greater than the preset threshold value, it indicates that the mixed air flow at this time is greatly different from the indoor temperature, which is easy to cause the indoor temperature fluctuation problem, at this time, the mixed air outlet 25 is controlled to be closed or the opening angle of the mixed air outlet 25 is changed to be smaller, so that the air volume of the mixed air flow can be reduced to ensure that the fresh air mixed air released to the indoor meets the comfort requirements of the human body.

[0076] And, when the mixed air outlet 25 is switched from being open to being closed or being open at a smaller angle, the rotation speed of the fresh air fan 22 is reduced to the lowest gear, and after a time T2, the air conditioner 100 is operated according to the above-mentioned control method of the air conditioner 100, wherein T2>0. That is, after the mixed air outlet 25 is opened, the mixed air flow that satisfies the indoor temperature is released from the mixed air outlet 25 to the indoor, and after being released for a certain time, since the mixed air outlet 25 of the mixed air cavity 23 is in an open state, the mixed air cavity 23 is not closed, so that the fresh air flow and the heat exchange flow entering the mixed air cavity 23 are not fully mixed, so that the temperature of the mixed air flow cannot satisfy the indoor temperature condition, that is, when the difference between the detected mixed air temperature value and the user-set temperature value is greater than the preset threshold value, the mixed air outlet 25 is controlled to be closed or the opening angle is reduced, so that after the mixed air outlet 25 is closed or the opening angle is reduced, a fresh air mixing air outlet period is completed, that is, “heat exchange air flow enters the mixed air cavity 23-fresh air flow enters the mixed air cavity 23 and mixes with the heat exchange air flow-open the mixed air outlet 25-close the mixed air outlet 25”, and then after a time T2, a next cycle period is entered, the controller controls the heat exchange fan 13 to start operating again, and the fresh air fan 22 stops operating again, the mixed air outlet 25 is closed or reduced, and the mixed air inlet 24 is opened, so that part of the heat exchange air flow enters the inside of the mixed air cavity 23 from the heat exchange outlet 14 through the mixed air inlet 24; then the fresh air fan 22 is controlled to start operating again, so that the fresh air flow enters the mixed air cavity 23 from the fresh air mixing outlet 27 and mixes with the heat exchange air flow contained in the mixed air cavity 23; when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than the preset threshold value, the mixed air outlet 25 is opened to increase the air outlet amount of the mixed air outlet 25.

[0077] Thus, the interval time T2 (T2>0) between the last air outlet period and the next air outlet period is set, so that the fresh air mixing is intermittent air outlet rather than continuous air outlet, on the one hand, the fresh air can be released to the indoor when the mixed air temperature value of the fresh air and the heat exchange air flow meets the requirement, so that the air outlet temperature quality of the fresh air mixing can be well guaranteed, on the other hand, the mixed air flow that meets the release condition can be continuously released to the indoor, so that the freshness of the indoor air is improved, the constant-temperature fresh air effect is achieved, and the problem of large indoor temperature fluctuation is avoided, thereby effectively improving the comfort of the user. In the continuous cycle, the controller controls the first mixed air plate 40 to rotate to the mixed air inlet 24, which can be always in an open state, and controls the heat exchange fan 13 to be always in a normal operating state, so that the repeated rotation of the first mixed air plate 40 and the repeated start of the heat exchange fan 13 can be reduced, and the refrigeration or heating mode can be always operated.

[0078] According to the above-mentioned control method, the following operation method can be referred to:

[0079] like Figure 7 As shown, in the heat exchange air (cooling, heating) mode, the heat exchange fan 13 and the heat exchange air guide plate 15 are normally turned on. At this time, the user instructs to turn on the fresh air function. After the air conditioner 100 receives the instruction,

[0080] Action 1: The first air mixing plate 40 is opened, the fresh air blower 22 stops running, and the second air mixing plate 30 closes the mixed air outlet 25 or opens the mixed air outlet 25 at a small angle. At this time, the air pressure in the air mixing chamber shell 23 is lower than the air pressure in the heat exchange duct 11, and the hot exchange air quickly enters the air mixing chamber shell 23;

[0081] Action 2: After 5 seconds, the fresh air fan 22 is turned on and runs at a low wind speed. The fresh air enters the air mixing chamber shell 23 and mixes with the heat exchange air for heat exchange.

[0082] Action three: When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than the preset threshold, the second air mixing plate 30 gradually rotates to the position where the mixed air outlet 25 is open or the mixed air outlet 25 is opened at a larger angle. The larger the opening angle of the second air mixing plate 30 at the mixed air outlet 25, the greater the speed of the fresh air fan 22.

[0083] Action 4: After 5 seconds, the second air mixing plate 30 rotates to a position where the mixed air outlet 25 is closed or the mixed air outlet 25 is opened at a smaller angle. The larger the closing angle of the second air mixing plate 30 at the mixed air outlet 25 is, the lower the speed of the fresh air fan 22 is.

[0084] Action 5: After 5 seconds, repeat the process from action 1 to action 4.

[0085] In an embodiment of the present invention, the rotation speed of the fresh air fan 22 can be divided into at least three gears, including: a first gear, a second gear and a third gear. After the fresh air fan 22 is turned on, the fresh air fan 22 is in the first gear, that is, low-speed operation. After the fresh air fan 22 runs for 5s, the second air mixing plate 30 is gradually opened, and the rotation speed of the fresh air fan 22 is gradually increased. When the second air mixing plate 30 is opened to one-half, the fresh air fan 22 is increased to the second gear, that is, medium-speed operation. When the second air mixing plate 30 is fully opened, the fresh air fan 22 is increased to the third gear, that is, high-speed operation; After running for 5 seconds, the second air mixing plate 30 is gradually closed, and the rotation speed of the fresh air fan 22 is gradually reduced. When the second air mixing plate 30 is closed to one-half, the fresh air fan 22 is reduced from the third gear to the second gear, that is, medium speed operation. When the second air mixing plate 30 is completely closed, the fresh air fan 22 is reduced to the first gear, that is, low speed operation, thereby achieving the gradual increase in the rotation speed of the fresh air fan 22 from the start of the second air mixing plate 30 to the full opening of the mixed air outlet 25, and the gradual decrease in the rotation speed of the fresh air fan 22 from the full opening of the mixed air outlet 25 to the full closing of the mixed air outlet 25.

[0086] Therefore, by following the above-mentioned process cycle of action 1 to action 5, the air conditioner 100 can continuously blow out mixed air that is a thorough mixture of fresh air and heat exchange air, thereby effectively solving the problem of large indoor temperature fluctuations.

[0087] Of course, the above-described operating method is only one embodiment of the present invention, and the specific time value is not limited. It can be set based on the air output of the heat exchange fan 13 and the rotation speed of the fresh air fan 22, as well as the area of ​​the mixed air inlet 24 and the mixed air outlet 25. This allows the fresh air and the heat exchange air to be fully mixed in the mixed air chamber housing 23 to achieve the effect of constant temperature fresh air, making the indoor air temperature suitable and the air fresh and healthy. When the air conditioner 100 is turned on for cooling or heating, the heat exchange air function can also be taken into account. At the same time, the fresh air and the heat exchange air can be fully mixed in the mixed air chamber housing 23, while improving the freshness of the indoor air, achieving the effect of constant temperature fresh air, avoiding the problem of large indoor temperature fluctuations, and effectively improving the user's comfort.

[0088] 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" and the like to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0089] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0090] 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 invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An air conditioner, comprising: The shell is provided with a heat exchange air inlet and a heat exchange air outlet; a heat exchanger, disposed inside the shell; A heat exchange fan is arranged inside the housing, and the heat exchange airflow formed by the heat exchange of the heat exchanger is output outward from the heat exchange air outlet under the operation drive of the heat exchange fan; A fresh air volute is arranged in the shell, with a fresh air mixed air inlet at one end and a fresh air mixed air outlet at the other end; A fresh air fan is provided inside the fresh air volute, introducing outdoor air into the fresh air volute through the fresh air mixing air inlet, and outputting fresh air outward through the fresh air mixing air outlet; It is characterized by further comprising: An air mixing chamber shell connected to the housing and arranged on the air mixing chamber shell adjacent to the heat exchange air outlet; At least one end of the air mixing chamber shell is connected to the fresh air mixing outlet, so that part of the airflow delivered by the fresh air mixing outlet enters the interior of the air mixing chamber shell; An air mixing inlet and an air mixing outlet are provided on the air mixing chamber shell, wherein the air mixing inlet is provided on a side of the air mixing chamber shell adjacent to the heat exchange outlet, and the air mixing outlet is provided on a side of the air mixing chamber shell away from the heat exchange outlet; a mixed air temperature sensor, disposed inside the air mixing chamber housing, for detecting the temperature of the air flow in the air mixing chamber housing; a controller configured to control the heat exchange fan to start and the fresh air fan to stop, open the mixed air inlet, so that part of the heat exchange air flow enters the interior of the mixed air chamber shell from the heat exchange air outlet through the mixed air inlet, and reduce the opening angle of the mixed air outlet to limit the air output of the mixed air outlet; After the heat exchange fan is started, the fresh air fan is controlled to restart so that the fresh air flows from the fresh air mixing outlet into the air mixing chamber shell and is mixed with the heat exchange air contained in the air mixing chamber shell; When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than a preset threshold, the mixed air outlet is controlled to open at a larger angle to increase the air outlet volume of the mixed air outlet, wherein the larger the opening angle of the mixed air outlet is, the greater the speed of the fresh air fan is controlled to be.

2. The air conditioner according to claim 1, characterized in that When the mixed air outlet is opened at the maximum angle, the rotation speed of the fresh air fan is increased to the highest gear; and When the opening angle of the mixed air outlet is the smallest, the rotation speed of the fresh air fan is reduced to the lowest gear.

3. The air conditioner according to claim 1, characterized in that The controller is specifically configured to control the opening angle of the mixed air outlet to gradually increase to fully open, and control the speed of the fresh air fan to gradually increase to the highest level when it determines that the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold.

4. The air conditioner according to claim 1, wherein: The controller is specifically configured to control the mixed air outlet to open at a larger angle to increase the air volume of the mixed air outlet when it is determined that the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold value; And when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is greater than a preset threshold, the opening angle of the mixed air outlet is controlled to become smaller to limit the air outlet volume of the mixed air outlet, wherein the smaller the opening angle of the mixed air outlet, the smaller the speed of the fresh air fan is controlled.

5. The air conditioner according to claim 4, characterized in that The controller is specifically configured to control the mixed air outlet to open at a larger angle to increase the air volume of the mixed air outlet when it is determined that the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold value; When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is greater than the preset threshold, the opening angle of the mixed air outlet is controlled to gradually decrease to completely closed, and the speed of the fresh air fan is controlled to gradually decrease to the lowest gear.

6. The air conditioner according to claim 4, characterized in that The controller is specifically configured to control the speed of the fresh air fan to be reduced to the lowest gear when the mixed air outlet is switched from open to closed or opened at a smaller angle; After time T2, the heat exchange fan is controlled to start and the fresh air fan is stopped, the mixed air inlet is opened, so that part of the heat exchange air flow enters the interior of the mixed air chamber shell from the heat exchange air outlet through the mixed air inlet, and the opening angle of the mixed air outlet is reduced to limit the air output of the mixed air outlet; After the heat exchange fan is started, the fresh air fan is controlled to restart so that the fresh air flows from the fresh air outlet into the air mixing chamber shell and is mixed with the heat exchange air contained in the air mixing chamber shell; When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the user-set temperature value is less than a preset threshold, the mixed air outlet is controlled to open at a larger angle to increase the air output of the mixed air outlet.

7. The air conditioner according to claim 1, wherein: Also includes: a first air mixing plate rotatably connected to the air mixing inlet, and the rotation of the first air mixing plate is used to control the flow of a portion of the heat exchange airflow flowing out of the heat exchange air outlet into the air mixing chamber shell; as well as, The second air mixing plate is rotatably connected to the air mixing outlet. The rotation of the second air mixing plate can realize on-off control of the fresh air flow and / or heat exchange air flow in the air mixing cavity shell flowing out from the air mixing outlet.

8. A method for controlling an air conditioner according to any one of claims 1 to 7, characterized in that: include: After the air conditioner is started, the fresh air function of the air conditioner can be turned on. The heat exchange fan is started and the fresh air fan is stopped, the mixed air inlet is opened to allow part of the heat exchange air flow to enter the interior of the mixed air chamber shell from the heat exchange air outlet through the mixed air inlet, and the opening angle of the mixed air outlet is reduced to limit the air output of the mixed air outlet; After the heat exchange fan is started, the fresh air fan is restarted to allow the fresh air to flow from the fresh air mixing outlet into the air mixing chamber shell and mix with the heat exchange air contained in the air mixing chamber shell. When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than a preset threshold, the mixed air outlet is opened at a larger angle to increase the air outlet volume of the mixed air outlet, wherein the larger the opening angle of the mixed air outlet is, the greater the speed of the fresh air fan is controlled.

9. The air conditioner control method according to claim 8, characterized in that: When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than a preset threshold, the mixed air outlet is controlled to open at a larger angle to increase the air flow of the mixed air outlet; And when the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is greater than a preset threshold, the opening angle of the mixed air outlet is controlled to become smaller to limit the air outlet volume of the mixed air outlet, wherein the smaller the opening angle of the mixed air outlet, the smaller the speed of the fresh air fan is controlled.

10. The air conditioner control method according to claim 9, characterized in that: When the mixed air outlet switches from open to closed or opens at a smaller angle, the speed of the fresh air fan is reduced to the lowest gear, and after time T2, the air conditioner operates according to the control method of the air conditioner in claim 9, wherein T2>0.

11. An air conditioner, comprising: The shell is provided with a heat exchange air inlet and a heat exchange air outlet; a heat exchanger, disposed inside the shell; A heat exchange fan is arranged inside the housing, and the heat exchange airflow formed by the heat exchange of the heat exchanger is output outward from the heat exchange air outlet under the operation drive of the heat exchange fan; A fresh air volute is arranged in the shell, with a fresh air mixed air inlet at one end and a fresh air mixed air outlet at the other end; A fresh air fan is provided inside the fresh air volute, introducing outdoor air into the fresh air volute through the fresh air mixing air inlet, and outputting fresh air outward through the fresh air mixing air outlet; It is characterized by further comprising: An air mixing chamber shell connected to the housing and arranged on the air mixing chamber shell adjacent to the heat exchange air outlet; At least one end of the air mixing chamber shell is connected to the fresh air mixing outlet, so that part of the airflow delivered by the fresh air mixing outlet enters the interior of the air mixing chamber shell; An air mixing inlet and an air mixing outlet are provided on the air mixing chamber shell, wherein the air mixing inlet is provided on a side of the air mixing chamber shell adjacent to the heat exchange outlet, and the air mixing outlet is provided on a side of the air mixing chamber shell away from the heat exchange outlet; a mixed air temperature sensor, disposed inside the air mixing chamber housing, for detecting the temperature of the air flow in the air mixing chamber housing; a controller configured to control the heat exchange fan to start and the fresh air fan to stop, open the mixed air inlet to allow part of the heat exchange air flow to enter the interior of the mixed air chamber shell from the heat exchange air outlet through the mixed air inlet, and close the mixed air outlet to limit the air output of the mixed air outlet; After the heat exchange fan is started, the fresh air fan is controlled to restart so that the fresh air flows from the fresh air mixing outlet into the air mixing chamber shell and is mixed with the heat exchange air contained in the air mixing chamber shell; When the difference between the mixed air temperature value detected by the mixed air temperature sensor and the temperature value set by the user is less than a preset threshold, the mixed air outlet is controlled to open to increase the air outlet volume of the mixed air outlet, wherein the larger the opening angle of the mixed air outlet is, the greater the speed of the fresh air fan is controlled to be.

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