Air conditioner, control method, and storage medium

Abstract

The application provides an air conditioner, a control method and a storage medium, comprising: an indoor unit comprising an indoor unit shell, the indoor unit shell being provided with a fresh air outlet; a fresh air module being installed on the indoor unit, the fresh air module having an indoor side air outlet and an outdoor side air outlet which are spaced apart; an outdoor unit comprising an outdoor unit shell and an outdoor heat exchanger installed in the outdoor unit shell, the outdoor unit shell being provided with a heat exchange opening opposite to the outdoor heat exchanger; a fresh air duct having a first communication opening and a second communication opening which are spaced apart; wherein the fresh air module has a fresh air introducing state and a defrosting state; when the fresh air module is in the fresh air introducing state, the outdoor side air outlet takes in air and the indoor side air outlet takes out air; when the fresh air module is in the defrosting state, the outdoor side air outlet takes out air and the indoor side air outlet takes in air. Through the technical scheme provided by the application, the technical problem that the use comfort is poor due to the fact that only the air conditioner enters the defrosting mode to defrost in the prior art can be solved.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more specifically, to an air conditioner, a control method, and a storage medium. Background Technology

[0002] Currently, air conditioners have both cooling and heating functions. When heating, because the refrigerant temperature inside the condenser is low, moisture in the environment easily condenses into frost on the condenser, affecting the air conditioner's heating performance. Although air conditioner manufacturing standards prohibit condenser frost formation under rated heating conditions, due to differences in installation and testing conditions, as well as problems that arise after long-term use such as condenser blockage, poor ventilation, and insufficient refrigerant, frost formation on the condenser is still unavoidable when air conditioners are heating.

[0003] Therefore, the existing defrosting method involves controlling the air conditioner to enter defrosting mode when the temperature detection device determines that defrosting is needed. This involves cooling to circulate the refrigerant along the cooling path, shutting off the outdoor fan, indoor fan, and auxiliary heater, and using the high-temperature refrigerant discharged from the compressor to melt the frost on the condenser. However, when using this method for defrosting, the air conditioner cannot provide heating to the room, resulting in poor indoor comfort. Summary of the Invention

[0004] The main objective of this invention is to provide an air conditioner, a control method, and a storage medium to solve the technical problem that defrosting by simply entering defrost mode in the existing technology can easily lead to poor user comfort.

[0005] To achieve the above objectives, according to one aspect of the present invention, an air conditioner is provided, comprising:

[0006] An indoor unit, including an indoor unit housing, wherein a fresh air outlet is provided on the indoor unit housing;

[0007] A fresh air module is installed on the indoor unit. The fresh air module has indoor side air vents and outdoor side air vents that are spaced apart. The indoor side air vents are arranged opposite to the fresh air outlet.

[0008] An outdoor unit and a fresh air duct, wherein the outdoor unit includes an outdoor unit housing and an outdoor heat exchanger installed inside the outdoor unit housing, and the outdoor unit housing is provided with a heat exchange port opposite to the outdoor heat exchanger; the fresh air duct has a first connecting port and a second connecting port arranged at intervals, the first connecting port being connected to the outdoor side air outlet, and the second connecting port being located on the side of the heat exchange port or facing the heat exchange port.

[0009] The fresh air module has a fresh air intake state and a defrosting state; when the fresh air module is in the fresh air intake state, air is drawn in through the outdoor air vent and air is discharged through the indoor air vent; when the fresh air module is in the defrosting state, air is discharged through the outdoor air vent and air is drawn in through the indoor air vent.

[0010] Furthermore, the fresh air module also includes:

[0011] The fresh air fan has a first rotation state and a second rotation state with opposite directions; when the fresh air module is in the fresh air intake state, the fresh air fan is in the first rotation state; when the fresh air module is in the defrost state, the fresh air fan is in the second rotation state.

[0012] Furthermore, the second connection port is located on the side of the heat exchange port, and the axis of the second connection port is inclined at a preset angle to the axis of the heat exchange port, or is perpendicular to, parallel to, or coincides with the axis of the heat exchange port.

[0013] Furthermore, the fresh air duct also has a fresh air inlet, which is located on the outdoor side of the fresh air duct and is spaced apart from the second connecting port; when the fresh air module is in the fresh air state, the second connecting port is closed and the fresh air inlet is open.

[0014] Furthermore, the fresh air inlet is located on the side of the fresh air duct away from the outdoor heat exchanger.

[0015] Furthermore, the fresh air duct includes a pipe body and a connecting part connected to each other. A second connecting port is provided at one end of the pipe body away from the connecting part. The connecting part includes a mounting plate, a first side plate and a second side plate connected in sequence. The mounting plate is installed on the outdoor unit casing and located on the side of the heat exchange port.

[0016] Wherein, the first side plate and the mounting plate are set at a preset angle, and the first side plate is provided with the second communication port; and / or,

[0017] The second side plate is disposed opposite to the mounting plate, and the fresh air inlet is provided on the second side plate.

[0018] Furthermore, the fresh air duct also includes:

[0019] A first wind deflector is movably disposed at the second communication opening to block or avoid the second communication opening; and / or,

[0020] The second baffle is movably installed at the fresh air inlet to block or avoid the fresh air inlet.

[0021] Furthermore, the indoor unit also includes an air duct module, which is used to provide heat exchange air to the room;

[0022] In this configuration, the fresh air chamber of the fresh air module is not connected to the heat exchange chamber of the air duct module; or,

[0023] The fresh air chamber of the fresh air module is connected to the heat exchange chamber of the air duct module; or,

[0024] The fresh air cavity of the fresh air module and the heat exchange cavity of the air duct module can be selectively connected or disconnected; when the fresh air module is in the fresh air intake state, the fresh air cavity of the fresh air module is connected to the heat exchange cavity of the air duct module; when the fresh air module is in the defrosting state, the fresh air cavity of the fresh air module is disconnected from the heat exchange cavity of the air duct module.

[0025] According to another aspect of the present invention, a control method for an air conditioner is provided, applicable to the air conditioner provided above, the control method for the air conditioner comprising:

[0026] Obtain the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperatures;

[0027] Based on the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions, determine whether to switch the fresh air module of the air conditioner to fresh air intake mode or defrost mode.

[0028] Further, determining whether to switch the fresh air module of the air conditioner to fresh air intake mode or defrosting mode based on the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions, includes:

[0029] When the air conditioner is in defrost mode, the fresh air module is controlled to be in the defrost state; when the air conditioner is in cooling mode or heating mode, the fresh air module is controlled to be in the fresh air intake state.

[0030] Further, determining whether to switch the fresh air module of the air conditioner to fresh air intake mode or defrosting mode based on the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions, includes:

[0031] When the air conditioner is in heating mode, the fresh air module of the air conditioner is controlled to switch to either the fresh air intake state or the defrosting state according to the indoor and outdoor temperature conditions.

[0032] Furthermore, the step of controlling the air conditioner's fresh air module to switch to the fresh air intake state or the defrosting state based on the indoor and outdoor temperature conditions includes:

[0033] Obtain the indoor-outdoor temperature difference Δt and the outdoor temperature T, and compare the indoor-outdoor temperature difference Δt with the preset indoor-outdoor temperature difference Δt0, and compare the outdoor temperature T with the preset outdoor temperature T0;

[0034] When T < T0 and Δt > Δt0, the fresh air module is controlled to switch to the defrosting state.

[0035] Furthermore, the control method further includes:

[0036] Obtain the rotational speed of the outdoor fan of the air conditioner;

[0037] The rotation speed of the fresh air fan in the fresh air module during the defrosting process is adjusted according to the rotation speed of the outdoor fan.

[0038] Further, adjusting the speed of the fresh air fan of the fresh air module in the defrosting state according to the speed of the outdoor fan includes:

[0039] When the outdoor fan is running at the first high wind speed, the fresh air fan is controlled to run at the second high wind speed.

[0040] When the outdoor fan is running at the first medium wind speed setting, the fresh air fan is controlled to run at the second medium wind speed setting.

[0041] When the outdoor fan is running at the first low wind speed setting, the fresh air fan is controlled to run at the second low wind speed setting.

[0042] Wherein, the rotational speed of the first high windshield is greater than that of the first medium windshield, and the rotational speed of the first medium windshield is greater than that of the first low windshield; the rotational speed of the second high windshield is greater than that of the second medium windshield, and the rotational speed of the second medium windshield is greater than that of the second low windshield.

[0043] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium comprising a stored program, wherein the program executes the control method provided above when it is run.

[0044] By applying the technical solution of this invention, real-time detection of indoor and outdoor air temperatures is employed. A control module determines if the conditions for frosting on the outdoor heat exchanger are met, adjusting the direction of the fresh air fan to draw high-temperature indoor air to the outdoor heat exchanger. This improves the heat exchange continuity of the outdoor heat exchanger and solves the problem of frosting easily in low-temperature heating mode, preventing disruption to air conditioner operation. Furthermore, by detecting ambient temperature and controlling the load on the fresh air fan when outdoor temperatures are low, the fresh air is redirected from being introduced into the room to being exhausted outdoors. This solves the problem of poor comfort caused by introducing fresh air into the air conditioner, achieving a comfortable fresh air experience. Attached Figure Description

[0045] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0046] Figure 1 A schematic diagram of the structure of an air conditioner according to an embodiment of the present invention is shown;

[0047] Figure 2 This diagram illustrates the airflow direction of the fresh air module provided according to an embodiment of the present invention when it is in the fresh air intake state;

[0048] Figure 3 This diagram illustrates the airflow direction of the fresh air module in defrost mode according to an embodiment of the present invention.

[0049] Figure 4 An exploded view of a partial structure of an air conditioner according to an embodiment of the present invention is shown;

[0050] Figure 5 A flowchart of a control method provided according to an embodiment of the present invention is shown.

[0051] The above figures include the following reference numerals:

[0052] 10. Indoor unit; 11. Indoor unit casing; 111. Fresh air outlet;

[0053] 20. Fresh air module; 21. Indoor air vent; 22. Outdoor air vent; 23. Fresh air fan;

[0054] 30. Outdoor unit; 31. Outdoor unit casing; 311. Heat exchange port; 32. Outdoor heat exchanger;

[0055] 40. Fresh air duct; 41. First connecting port; 42. Second connecting port; 43. Fresh air inlet; 44. Pipe body; 45. Connecting part; 451. Mounting plate; 452. First side plate; 453. Second side plate. Detailed Implementation

[0056] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] like Figures 1 to 4As shown, Embodiment 1 of the present invention provides an air conditioner, which includes: an indoor unit 10, a fresh air module 20, an outdoor unit 30, and a fresh air duct 40. The indoor unit 10 includes an indoor unit housing 11, on which a fresh air outlet 111 is provided. The fresh air module 20 is installed on the indoor unit 10 and has an indoor side air outlet 21 and an outdoor side air outlet 22 arranged at intervals, with the indoor side air outlet 21 opposite to the fresh air outlet 111. The outdoor unit 30 includes an outdoor unit housing 31 and an outdoor heat exchanger 32 installed inside the outdoor unit housing 31. The outdoor unit housing 31 is provided with a heat exchange port 311 arranged opposite to the outdoor heat exchanger 32. The fresh air duct 40 has a first connecting port 41 and a second connecting port 42 arranged at intervals. The first connecting port 41 communicates with the outdoor side air outlet 22, and the second connecting port 42 is located on the side of the heat exchange port 311 or facing the heat exchange port 311. The fresh air module 20 has a fresh air intake state and a defrosting state. When the fresh air module 20 is in the fresh air intake state, the outdoor air vent 22 intakes air and the indoor air vent 21 exhausts air. When the fresh air module 20 is in the defrosting state, the outdoor air vent 22 exhausts air and the indoor air vent 21 intakes air.

[0058] The air conditioner provided in the embodiments of the present invention, when defrosting the frost on the outdoor heat exchanger 32 is required, puts the fresh air module 20 into a defrosting state, with air outlet 22 and air intake 21. This allows the air exiting through the outdoor air outlet 22 to flow out through the second connecting port 42 of the fresh air duct 40, thereby directing the higher-temperature indoor air vertically to the outdoor heat exchanger 32 via the heat exchange port 311. This facilitates the defrosting effect on the outdoor heat exchanger 32 using the higher-temperature indoor air. This method reduces the number of times the air conditioner enters defrosting mode, and may even eliminate the need for defrosting mode altogether. This avoids the situation where frequent defrosting prevents the air conditioner from operating normally and sustaining indoor heating, resulting in poor user comfort. Therefore, the air conditioner provided in this embodiment solves the technical problem in the prior art where defrosting solely through the air conditioner's defrosting mode leads to poor user comfort.

[0059] Specifically, the switching between the fresh air module 20's fresh air intake state and defrosting state is achieved by switching the airflow direction of the fresh air module 20. When in the fresh air intake state, the fresh air module 20 is used to introduce outdoor fresh air into the room to improve indoor air comfort; when in the defrosting state, the fresh air module 20 is used to introduce indoor hot air to the outdoor heat exchanger 32 to improve the defrosting effect of the outdoor heat exchanger 32.

[0060] In this embodiment, the fresh air module 20 further includes a fresh air fan 23, which has a first rotation state and a second rotation state with opposite directions. When the fresh air module 20 is in the fresh air intake state, the fresh air fan 23 is in the first rotation state; when the fresh air module 20 is in the defrosting state, the fresh air fan 23 is in the second rotation state. With this configuration, the fresh air intake state and the defrosting state of the fresh air fan 23 can be switched simply by switching the rotation state of the fresh air fan 23, which facilitates the switching of the state of the fresh air fan 23 and thus helps to ensure stable fresh air intake or defrosting.

[0061] It should be noted that when the fresh air fan 23 is in the first rotating state, it rotates in the forward direction (clockwise or counterclockwise); when it is in the second rotating state, it rotates in the reverse direction (clockwise or counterclockwise). Specifically, when the fresh air fan 23 rotates in the forward direction, the motor starts rotating forward, and the air circulation channel draws in fresh outdoor air through the outdoor side air vent 22 and exhausts indoor air through gaps in doors and windows, thus exchanging air. When the fresh air fan 23 rotates in the reverse direction, the motor starts rotating in the reverse direction, and the air circulation channel draws in fresh outdoor air through the indoor side air vent 21 and exhausts indoor air through the outdoor side air vent 22, creating a slight negative pressure zone indoors. Fresh outdoor air is then drawn into the room through gaps in doors and windows, thus exchanging air.

[0062] Specifically, the fresh air module 20 also includes a fresh air housing, and the fresh air fan 23 is installed inside the fresh air housing. Specifically, an indoor air vent 21 and an outdoor air vent 22 can be respectively provided on both sides of the fresh air housing.

[0063] Specifically, in other embodiments, the switching between the fresh air intake state and the defrosting state of the fresh air module 20 can be achieved in different ways. Specifically, the fresh air module 20 can also be configured with two spaced-apart air chambers, one containing a fan and the other containing a different fan. Switching is achieved by combining the opening and closing of the two air chambers with the opening and closing of the corresponding fans. Alternatively, the fresh air module 20 can also include a fan and an exhaust pump. The fan rotates in a single direction, and its rotation is used to achieve the fresh air intake state, while the exhaust pump operates to achieve the defrosting state.

[0064] In this embodiment, the second connecting port 42 is located on the side of the heat exchange port 311. The axis of the second connecting port 42 is inclined at a preset angle to the axis of the heat exchange port 311, or is perpendicular to, parallel to, or coincides with it. This facilitates the introduction of higher-temperature indoor air through the second connecting port 42 to the heat exchange port 311, thereby ensuring the defrosting effect on the heat exchanger at the heat exchange port 311 and enabling the air conditioner to operate normally in heating mode.

[0065] Specifically, the fresh air duct 40 also has a fresh air inlet 43, located on the outdoor side of the fresh air duct 40, and spaced apart from the second connecting port 42. When the fresh air module 20 is in fresh air mode, the second connecting port 42 is closed, and the fresh air inlet 43 is open. This structural arrangement avoids introducing cooler air near the fresh air inlet 43 into the room when the fresh air module 20 is in heating mode, thus preventing a significant drop in indoor air temperature and affecting indoor comfort. Conversely, when the fresh air module 20 is in cooling mode, it also avoids introducing hotter air from the outdoor heat exchanger 32 into the room, thereby also ensuring indoor air comfort to a certain extent.

[0066] Specifically, the fresh air inlet 43 is located on the side of the fresh air duct 40 furthest from the outdoor heat exchanger 32. This ensures that the fresh air inlet 43 is as far away from the outdoor heat exchanger 32 as possible, thereby facilitating the introduction of air from a greater distance from the outdoor heat exchanger 32 into the room. This prevents the temperature of the introduced fresh air from being affected by the heat exchange with the outdoor heat exchanger 32, thus minimizing the occurrence of excessively low temperatures of the introduced fresh air when heating is needed and excessively high temperatures when cooling is needed, thereby ensuring the effectiveness of the fresh air intake.

[0067] In this embodiment, the fresh air duct 40 includes a pipe body 44 and a connecting part 45 connected to each other. A second connecting port 42 is provided at the end of the pipe body 44 away from the connecting part 45. The connecting part 45 includes a mounting plate 451, a first side plate 452 and a second side plate 453 connected in sequence. The mounting plate 451 is mounted on the outdoor unit housing 31 and located on the side of the heat exchange port 311.

[0068] The first side plate 452 and the mounting plate 451 are set at a preset angle, and the first side plate 452 is provided with a second connecting port 42. This structural arrangement makes it easier to optimize the setting position of the second connecting port 42, so that the second connecting port 42 is set as close as possible to the outdoor heat exchanger 32, thereby facilitating the defrosting effect of the outdoor heat exchanger 32.

[0069] Specifically, the second side plate 453 is positioned opposite to the mounting plate 451, and a fresh air inlet 43 is provided on the second side plate 453. This structural arrangement facilitates the optimization of the placement of the fresh air inlet 43, ensuring that the fresh air introduced by the inlet 43 is not affected by the heat exchange of the outdoor heat exchanger 32, avoiding excessive temperature differences between the fresh air and the indoor air, and maximizing the comfort of the introduced fresh air.

[0070] In this embodiment, the fresh air duct 40 further includes a first baffle plate, which is movably disposed at the second connecting port 42 to block or avoid the second connecting port 42. Thus, by controlling the movement of the first baffle plate, the state of the fresh air module 20 can be easily switched.

[0071] The fresh air duct 40 also includes a second baffle plate, which is movably disposed at the fresh air inlet 43 to block or avoid the fresh air inlet 43. With this structural arrangement, the opening and closing of the second connection port 42 and the fresh air inlet 43 can be easily realized according to different states of the fresh air module 20 by controlling the movement of the second baffle plate.

[0072] Specifically, the air conditioner in this embodiment further includes a control module, a first electric drive unit, and a second electric drive unit. The first electric drive unit drives the first baffle to rotate or move to block or avoid obstacles, and the second electric drive unit drives the second baffle to rotate or move to block or avoid obstacles. Both the first and second electric drive units are electrically connected to the control module. The control module controls the first and second electric drive units based on information confirming whether defrosting of the heat exchanger is required, thereby controlling the first and second baffles. This facilitates the opening and closing of the second connection port 42 and the fresh air inlet 43 according to different states of the fresh air module 20.

[0073] In this embodiment, the indoor unit 10 also includes an air duct module, which is used to provide heat exchange air to the room.

[0074] Specifically, in one embodiment, the fresh air cavity of the fresh air module 20 is not connected to the heat exchange cavity of the air duct module, that is, the fresh air module 20 and the air duct module are independently separated structures, so that the fresh air or defrosting air and the air in the heat exchange cavity do not affect each other and proceed independently.

[0075] In another embodiment, the fresh air chamber of the fresh air module 20 is connected to the heat exchange chamber of the duct module. This facilitates ensuring that the air entering the room passes through the heat exchange chamber, reducing the temperature difference between the incoming fresh air and the indoor air, and improving user comfort. Furthermore, during defrosting, it also effectively ensures that the temperature of the air used for defrosting is increased, thereby improving the defrosting effect.

[0076] In another embodiment, the fresh air cavity of the fresh air module 20 and the heat exchange cavity of the duct module can be selectively connected or disconnected. When the fresh air module 20 is in the fresh air intake state, the fresh air cavity of the fresh air module 20 is connected to the heat exchange cavity of the duct module; when the fresh air module 20 is in the defrosting state, the fresh air cavity of the fresh air module 20 is disconnected from the heat exchange cavity of the duct module. This configuration helps to reduce the temperature difference between the fresh air and the indoor air when the fresh air module 20 is in the fresh air intake state, improving user comfort. When the fresh air module 20 is in the defrosting state, it avoids the defrosting air passing through the heat exchange cavity and affecting the temperature of the heat exchange cavity, ensuring that the temperature of the heat exchange cavity is not affected, thereby facilitating the user comfort of the indoor environment.

[0077] Embodiment 2 of the present invention provides a control method for an air conditioner, applicable to the air conditioner provided above. The control method includes: acquiring the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperatures; determining whether to switch the fresh air module 20 of the air conditioner to a fresh air intake state or a defrosting state based on the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperatures. This method facilitates the determination of whether the outdoor heat exchanger 32 of the air conditioner is frosted, and when the outdoor heat exchanger 32 is frosted, switching the fresh air module 20 to a defrosting state; when the outdoor heat exchanger 32 is not frosted, controlling the fresh air module 20 to switch to a fresh air intake state according to the user's settings or the mode settings.

[0078] In one embodiment, determining whether to switch the air conditioner's fresh air module 20 to either fresh air intake or defrost mode based on the air conditioner's operating mode, or the air conditioner's operating mode and indoor / outdoor temperature conditions, includes: controlling the fresh air module 20 to be in defrost mode when the air conditioner is in defrost mode; and controlling the fresh air module 20 to be in fresh air intake mode when the air conditioner is in cooling or heating mode. This method helps to reduce the time the air conditioner spends in defrost mode, thereby reducing the time the air conditioner's heating mode is interrupted, and ultimately improving indoor air comfort.

[0079] In another embodiment, determining whether to switch the air conditioner's fresh air module 20 to either fresh air intake or defrost mode based on the air conditioner's operating mode, or the air conditioner's operating mode and indoor / outdoor temperature conditions, includes: when the air conditioner is in heating mode, controlling the air conditioner's fresh air module 20 to switch to either fresh air intake or defrost mode based on indoor / outdoor temperature conditions. This method allows for defrosting via the fresh air module 20 when the outdoor heat exchanger 32 is frosted, avoiding the situation where directly switching the air conditioner to defrost mode would cause the heating mode to stop, thereby improving the air conditioner's operational stability and user comfort.

[0080] Specifically, controlling the fresh air module 20 of the air conditioner to switch to either fresh air intake or defrosting mode based on indoor and outdoor temperature conditions includes: acquiring the indoor-outdoor temperature difference Δt and the outdoor temperature T, comparing the indoor-outdoor temperature difference Δt with a preset indoor-outdoor temperature difference Δt0, and comparing the outdoor temperature T with a preset outdoor temperature T0; when T < T0 and Δt > Δt0, controlling the fresh air module 20 to switch to defrosting mode. This method facilitates improved accuracy in controlling the switching of the fresh air module 20, enabling accurate determination of whether the outdoor heat exchanger 32 is frosted, allowing for initial defrosting of the outdoor heat exchanger 32 via the fresh air module 20. Specifically, Δt0 can be between 10℃ and 17℃, and T0 can be between -8℃ and -2℃. Specifically, the indoor-outdoor temperature difference Δt and Δt0 are values ​​greater than or equal to zero. Preferably, Δt0 can be 15℃, and T0 can be -5℃.

[0081] In all the above embodiments, the control method further includes: acquiring the rotational speed of the outdoor fan of the air conditioner; and adjusting the rotational speed of the fresh air fan 23 of the fresh air module 20 in the defrosting state according to the rotational speed of the outdoor fan. This ensures that the rotational speed of the fresh air fan 23 of the fresh air module 20 is matched with the rotational speed of the outdoor fan, thereby guaranteeing the defrosting effect on the outdoor heat exchanger 32. Specifically, when the rotational speed of the outdoor fan is low, the rotational speed of the fresh air fan 23 is controlled to be low; when the rotational speed of the outdoor fan is high, the rotational speed of the fresh air fan 23 is controlled to be high.

[0082] Specifically, the speed of the fresh air fan 23 in the defrosting state of the fresh air module 20 is adjusted according to the speed of the outdoor fan, including: when the outdoor fan is running at the first high wind speed, the fresh air fan 23 is controlled to run at the second high wind speed; when the outdoor fan is running at the first medium wind speed, the fresh air fan 23 is controlled to run at the second medium wind speed; when the outdoor fan is running at the first low wind speed, the fresh air fan 23 is controlled to run at the second low wind speed; wherein, the speed of the first high wind speed is greater than the speed of the first medium wind speed, the speed of the first medium wind speed is greater than the speed of the first low wind speed; the speed of the second high wind speed is greater than the speed of the second medium wind speed, and the speed of the second medium wind speed is greater than the speed of the second low wind speed. This configuration allows the windshield of the fresh air fan 23 to match that of the outdoor fan. This means that when the outdoor fan operates at a higher speed (corresponding to more severe frosting), the amount of warmer air supplied to the outdoor heat exchanger 32 is increased, effectively improving defrosting efficiency. Conversely, when the outdoor fan operates at a lower speed (corresponding to less severe frosting), the amount of warmer air supplied to the outdoor heat exchanger 32 is reduced to avoid affecting the indoor temperature.

[0083] like Figure 5As shown, the air conditioner is in heating mode, the fresh air unit is on, and the air conditioner detects the outdoor ambient temperature T1. Based on these conditions, the following control method is used:

[0084] First, determine the outdoor temperature T. If the outdoor temperature T ≤ -5℃, the fresh air unit motor starts in reverse, and the air circulation channel is through indoor side air inlet 21 and outdoor side air outlet 22; the control logic principle is as follows:

[0085] When the outdoor temperature T < -5℃, and the indoor temperature is generally above 10℃, the temperature difference is significant, typically greater than 15℃. This can cause a large amount of condensation inside the fresh air unit and at the air outlet due to heat exchange, affecting indoor comfort. Therefore, it is not advisable to directly introduce the condensate into the room; instead, the motor reverse mode is used. When the outdoor temperature T < -5℃, the surface temperature of the outdoor unit's condenser (corresponding to the outdoor heat exchanger 32) is even lower due to heat exchange, making it easier for moisture in the environment to condense into frost on the condenser, affecting the air conditioner's heating performance.

[0086] Proceed to the next judgment condition; when the outdoor fan is set to high speed, it is determined that the indoor load is large and the heat exchange needs to be increased. At this time, the condenser surface temperature will drop rapidly. In order to ensure that the temperature is above the frost level, more heat is needed, so the motor speed is adjusted to high speed; when the outdoor fan is set to medium speed, the motor speed is adjusted to medium speed; when the outdoor fan is set to low speed, the motor speed is adjusted to low speed; when the outdoor temperature T > -5℃, the fresh air fan motor starts rotating in the forward direction. The air circulation channel draws in fresh outdoor air through the outdoor side air inlet 22 and the indoor side air inlet 21, and exhausts indoor air through gaps in doors and windows, thus forming air exchange.

[0087] When the air conditioner is in cooling mode, the fresh air unit is turned on and the fresh air unit motor starts rotating in the forward direction. The air circulation channel draws in fresh outdoor air through the outdoor side air inlet 22 and the indoor side air inlet 21, and exhausts indoor air through gaps in doors and windows, thus forming an air exchange.

[0088] Embodiment 3 of the present invention provides a computer-readable storage medium, which includes a stored program, wherein the program executes the control method provided above when it runs.

[0089] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: By controlling the load of the fresh air fan, the flow direction of fresh air can be controlled in different environments; in the low-temperature heating mode, the indoor and outdoor air temperatures are detected in real time, and the main control system (corresponding to the control module) determines whether the conditions for condenser frosting are met, and adjusts the direction of the fresh air fan to draw high-temperature indoor air to the condenser, thus solving the risk of condenser frosting and meeting the demand for fresh air introduction; the switching device for the outdoor air duct outlet (including the second connecting port and the fresh air inlet) can realize the switching of the outlet. The following technical problems are solved: the problem of fresh air condensation in the low-temperature heating mode of the fresh air air conditioner is solved; the problem of easy frosting of the outdoor unit condenser in the low-temperature heating mode of the air conditioner is solved.

[0090] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0091] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0092] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0093] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0094] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0095] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An air conditioner, characterized in that, include: The indoor unit (10) includes an indoor unit housing (11) on which a fresh air outlet (111) is provided. A fresh air module (20) is installed on the indoor unit (10). The fresh air module (20) has an indoor side air outlet (21) and an outdoor side air outlet (22) arranged at intervals. The indoor side air outlet (21) is arranged opposite to the fresh air outlet (111). An outdoor unit (30) and a fresh air duct (40) are provided. The outdoor unit (30) includes an outdoor unit housing (31) and an outdoor heat exchanger (32) installed inside the outdoor unit housing (31). The outdoor unit housing (31) is provided with a heat exchange port (311) that is opposite to the outdoor heat exchanger (32). The fresh air duct (40) has a first connecting port (41) and a second connecting port (42) that are spaced apart. The first connecting port (41) is connected to the outdoor side air outlet (22), and the second connecting port (42) is located on the side of the heat exchange port (311) or is provided towards the heat exchange port (311). The fresh air module (20) has a fresh air intake state and a defrost state; when the fresh air module (20) is in the fresh air intake state, the outdoor air vent (22) intakes air and the indoor air vent (21) exhausts air. When the fresh air module (20) is in the defrosting state, the outdoor air outlet (22) discharges air and the indoor air outlet (21) receives air. The fresh air duct (40) also has a fresh air inlet (43), which is located on the outdoor side of the fresh air duct (40). The fresh air inlet (43) is spaced apart from the second connecting port (42). When the fresh air module (20) is in the fresh air state, the second connecting port (42) is closed and the fresh air inlet (43) is open. The fresh air inlet (43) is located on the side of the fresh air duct (40) away from the outdoor heat exchanger (32).

2. The air conditioner according to claim 1, characterized in that, The fresh air module (20) also includes: The fresh air fan (23) has a first rotation state and a second rotation state with opposite directions; when the fresh air module (20) is in the fresh air intake state, the fresh air fan (23) is in the first rotation state; when the fresh air module (20) is in the defrosting state, the fresh air fan (23) is in the second rotation state.

3. The air conditioner according to claim 1, characterized in that, The second communication port (42) is located on the side of the heat exchange port (311). The axis of the second communication port (42) is inclined, perpendicular, parallel or coincident with the axis of the heat exchange port (311) at a preset angle.

4. The air conditioner according to claim 1, characterized in that, The fresh air duct (40) includes a pipe body (44) and a connecting part (45) connected to each other. The pipe body (44) is provided with a second connecting port (42) at one end away from the connecting part (45). The connecting part (45) includes a mounting plate (451), a first side plate (452) and a second side plate (453) connected in sequence. The mounting plate (451) is installed on the outdoor unit housing (31) and located on the side of the heat exchange port (311). Wherein, the first side plate (452) and the mounting plate (451) are set at a preset angle, and the first side plate (452) is provided with the second communication port (42); and / or, The second side plate (453) is disposed opposite to the mounting plate (451), and the fresh air inlet (43) is disposed on the second side plate (453).

5. The air conditioner according to claim 1, characterized in that, The fresh air duct (40) also includes: A first windbreak is movably disposed at the second communication port (42) to block or avoid the second communication port (42); and / or, The second wind deflector is movably disposed at the fresh air inlet (43) to block or avoid the fresh air inlet (43).

6. The air conditioner according to claim 1, characterized in that, The indoor unit (10) also includes an air duct module, which is used to provide heat exchange air to the room; In this configuration, the fresh air cavity of the fresh air module (20) is not connected to the heat exchange cavity of the air duct module; or, The fresh air cavity of the fresh air module (20) is connected to the heat exchange cavity of the air duct module; or, The fresh air cavity of the fresh air module (20) and the heat exchange cavity of the air duct module can be selectively connected or disconnected; when the fresh air module (20) is in the fresh air intake state, the fresh air cavity of the fresh air module (20) is connected to the heat exchange cavity of the air duct module; when the fresh air module (20) is in the defrosting state, the fresh air cavity of the fresh air module (20) is disconnected from the heat exchange cavity of the air duct module.

7. A control method for an air conditioner, characterized in that, The air conditioner applicable to any one of claims 1 to 6, the control method of the air conditioner comprising: Obtain the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperatures; Based on the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions, determine whether to switch the fresh air module of the air conditioner to fresh air intake mode or defrost mode.

8. The control method for an air conditioner according to claim 7, characterized in that, The step of determining whether to switch the fresh air module of the air conditioner to fresh air intake mode or defrost mode based on the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions, includes: When the air conditioner is in defrost mode, the fresh air module is controlled to be in the defrost state; when the air conditioner is in cooling mode or heating mode, the fresh air module is controlled to be in the fresh air intake state.

9. The control method for an air conditioner according to claim 7, characterized in that, The step of determining whether to switch the fresh air module of the air conditioner to fresh air intake mode or defrost mode based on the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions, includes: When the air conditioner is in heating mode, the fresh air module of the air conditioner is controlled to switch to either the fresh air intake state or the defrosting state according to the indoor and outdoor temperature conditions.

10. The control method for an air conditioner according to claim 9, characterized in that, The step of controlling the fresh air module of the air conditioner to switch to the fresh air intake state or the defrosting state based on the indoor and outdoor temperature conditions includes: Obtain the indoor-outdoor temperature difference Δt and the outdoor temperature T, and compare the indoor-outdoor temperature difference Δt with the preset indoor-outdoor temperature difference Δt0, and compare the outdoor temperature T with the preset outdoor temperature T0; When T < T0 and Δt > Δt0, the fresh air module is controlled to switch to the defrosting state.

11. The control method for an air conditioner according to claim 7, characterized in that, The control method further includes: Obtain the rotational speed of the outdoor fan of the air conditioner; The rotation speed of the fresh air fan in the fresh air module during the defrosting process is adjusted according to the rotation speed of the outdoor fan.

12. The control method for an air conditioner according to claim 11, characterized in that, The step of adjusting the speed of the fresh air fan of the fresh air module in the defrosting state according to the speed of the outdoor fan includes: When the outdoor fan is running at the first high wind speed, the fresh air fan is controlled to run at the second high wind speed. When the outdoor fan is running at the first medium wind speed setting, the fresh air fan is controlled to run at the second medium wind speed setting. When the outdoor fan is running at the first low wind speed setting, the fresh air fan is controlled to run at the second low wind speed setting. Specifically, the rotational speed of the first high windshield is greater than that of the first medium windshield, and the rotational speed of the first medium windshield is greater than that of the first low windshield; the rotational speed of the second high windshield is greater than that of the second medium windshield, and the rotational speed of the second medium windshield is greater than that of the second low windshield.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program, when executed, performs the control method according to any one of claims 7 to 12.

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