Air conditioner, control method and storage medium

Abstract

The invention provides an air conditioner, a control method and a storage medium. An indoor unit comprises an indoor unit shell, and a fresh air outlet is formed in the indoor unit shell; the fresh air module is installed on the indoor unit and provided with an indoor side air opening and an outdoor side air opening which are arranged in a spaced mode. The outdoor unit comprises an outdoor unit shell and an outdoor heat exchanger installed in the outdoor unit shell, and a heat exchange opening opposite to the outdoor heat exchanger is formed in the outdoor unit shell. The fresh air pipeline is provided with a first communicating port and a second communicating port which are arranged at intervals; wherein the fresh air module has a fresh air inducing state and a defrosting state; when the fresh air module is in a fresh air inducing state, air enters from the outdoor side air port, and air exits from the indoor side air port; and when the fresh air module is in the defrosting state, air is discharged from the outdoor side air port, and air is fed from the indoor side air port. Through the technical scheme provided by the invention, the technical problem that in the prior art, defrosting is carried out only through the air conditioner entering the defrosting mode, and consequently the use comfort is poor can be solved.

Description

Technical Field

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

[0002] Currently, air conditioners have both cooling and heating functions. During heating, due to the low temperature of the refrigerant in the condenser, moisture in the environment easily condenses into frost on the condenser, affecting the air conditioner's heating performance. Although air conditioner production standards prohibit condenser frost under rated heating conditions, frost on the condenser during heating is still unavoidable due to differences in installation and experimental conditions, as well as problems that arise over time due to problems such as condenser obstruction, poor ventilation, and insufficient refrigerant.

[0003] To address this, existing defrosting methods use a temperature detection device to control the air conditioner to enter defrost mode when defrosting is required. This mode activates cooling to circulate the refrigerant along the cooling path, shutting down the external and internal fans and the auxiliary heater, and using the high-temperature refrigerant discharged from the compressor to melt the frost on the condenser. However, this defrosting method prevents the air conditioner from providing indoor heating, resulting in poor indoor comfort. Summary of the Invention

[0004] The main purpose of the present invention is to provide an air conditioner, a control method and a storage medium to solve the technical problem in the prior art that defrosting by only entering the defrost mode of the air conditioner easily leads to poor user comfort.

[0005] In order to achieve the above object, according to one aspect of the present invention, there is provided an air conditioner, comprising:

[0006] The indoor unit comprises an indoor unit housing, wherein the indoor unit housing is provided with a fresh air outlet;

[0007] A fresh air module is installed on the indoor unit, and the fresh air module has an indoor air outlet and an outdoor air outlet spaced apart from each other, and the indoor air outlet is 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 in the outdoor unit housing, the outdoor unit housing is provided with a heat exchange port arranged opposite to the outdoor heat exchanger; the fresh air duct has a first communication port and a second communication port arranged at intervals, the first communication port is connected to the outdoor air port, and the second communication port is located on the side of the heat exchange port or is arranged toward the heat exchange port;

[0009] Among them, 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, the outdoor side air outlet intakes air and the indoor side air outlet discharges air; when the fresh air module is in the defrosting state, the outdoor side air outlet discharges air and the indoor side air outlet intakes air.

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

[0011] A fresh air fan, which has a first rotation state and a second rotation state with opposite rotation 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 defrosting state, the fresh air fan is in the second rotation state.

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

[0013] Furthermore, the fresh air duct further has a fresh air intake port, which is located on the outdoor side of the fresh air duct, and the fresh air intake port is spaced apart from the second communication port; when the fresh air module is in the fresh air state, the second communication port is closed and the fresh air intake port is opened.

[0014] Furthermore, the fresh air intake port 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 part and a communication part connected to each other. The second communication port is provided at one end of the pipe body part away from the communication part. The communication part includes a mounting plate, a first side plate and a second side plate connected in sequence. The mounting plate is mounted on the outdoor unit housing and is located at the side of the heat exchange port;

[0016] Among them, the first side plate and the mounting plate are arranged at a preset angle, and the second communication port is provided on the first side plate; and / or,

[0017] The second side plate is arranged opposite to the mounting plate, and the fresh air intake port is provided on the second side plate.

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

[0019] A first wind baffle, which is movably arranged at the second communication port to block or avoid the second communication port; and / or,

[0020] A second wind baffle, which is movably arranged at the fresh air intake port to block or avoid the fresh air intake port.

[0021] Further, the indoor unit further includes an air duct module for providing heat-exchanged air to the room.

[0022] Wherein, the fresh air chamber of the fresh air module is not communicated with the heat exchange chamber of the air duct module; or,

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

[0024] The fresh air chamber of the fresh air module can be selectively communicated or disconnected from the heat exchange chamber of the air duct module; when the fresh air module is in the fresh air intake state, the fresh air chamber of the fresh air module is communicated with the heat exchange chamber of the air duct module; when the fresh air module is in the defrosting state, the fresh air chamber of the fresh air module is disconnected from the heat exchange chamber of the air duct module.

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

[0026] Obtaining the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions;

[0027] Determining, according to the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions, whether to control the fresh air module of the air conditioner to switch to the fresh air intake state or the defrosting state.

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

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

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

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

[0032] Further, the controlling, according to the indoor and outdoor temperature conditions, the fresh air module of the air conditioner to switch to the fresh air intake state or the defrosting state includes:

[0033] Obtain the indoor-outdoor temperature difference value △t and the outdoor temperature T, and compare the indoor-outdoor temperature difference △t with a preset indoor-outdoor temperature difference △t0, and compare the outdoor temperature T with a preset outdoor temperature T0;

[0034] When T < T0 and △t > △t0, control the fresh air module to switch to the defrost state.

[0035] Furthermore, the control method further includes:

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

[0037] Adjust the rotation speed of the fresh air fan of the fresh air module in the defrost state according to the rotation speed of the outdoor fan.

[0038] Furthermore, the adjusting the rotation speed of the fresh air fan of the fresh air module in the defrost state according to the rotation speed of the outdoor fan includes:

[0039] When the rotation speed of the outdoor fan is operating at the first high wind speed gear, control the fresh air fan to operate at the second high wind speed gear;

[0040] When the rotation speed of the outdoor fan is operating at the first medium wind speed gear, control the fresh air fan to operate at the second medium wind speed gear;

[0041] When the rotation speed of the outdoor fan is operating at the first low wind speed gear, control the fresh air fan to operate at the second low wind speed gear;

[0042] Wherein, the rotation speed of the first high wind speed gear is greater than the rotation speed of the first medium wind speed gear, and the rotation speed of the first medium wind speed gear is greater than the rotation speed of the first low wind speed gear; the rotation speed of the second high wind speed gear is greater than the rotation speed of the second medium wind speed gear, and the rotation speed of the second medium wind speed gear is greater than the rotation speed of the second low wind speed gear.

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

[0044] Applying the technical solution of the present invention, the present invention takes real-time detection of indoor and outdoor air temperatures, judges through a control module, if the conditions for frosting of the outdoor heat exchanger are met, adjusts the fresh air fan direction, leads the high-temperature indoor gas to the outdoor heat exchanger, improves the heat exchange sustainability of the outdoor heat exchanger, solves the problem that the air conditioner is prone to frosting in the low-temperature heating mode, and avoids affecting the operation of the air conditioner. The present invention detects the ambient temperature, when the outdoor temperature is low, controls the fresh air fan load, adjusts the fresh air from being introduced into the room to being discharged outdoors, solves the problem of poor comfort caused by the air conditioner introducing fresh air, and achieves the technical effect of comfortable fresh air. Brief Description of the Drawings

[0045] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0046] Figure 1 shows a schematic structural diagram of an air conditioner provided according to an embodiment of the present invention;

[0047] Figure 2 shows a schematic diagram of the air flow direction when the fresh air module provided according to an embodiment of the present invention is in the state of introducing fresh air;

[0048] Figure 3 shows a schematic diagram of the air flow direction when the fresh air module provided according to an embodiment of the present invention is in the defrosting state;

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

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

[0051] Among them, the above-mentioned drawings include the following reference numerals:

[0052] 10, indoor unit; 11, indoor unit housing; 111, fresh air outlet;

[0053] 20, fresh air module; 21, indoor side air outlet; 22, outdoor side air outlet; 23, fresh air fan;

[0054] 30, outdoor unit; 31, outdoor unit housing; 311, heat exchange port; 32, outdoor heat exchanger;

[0055] 40, fresh air duct; 41, first communication port; 42, second communication port; 43, fresh air inlet; 44, pipe body part; 45, connecting part; 451, mounting plate; 452, first side plate; 453, second side plate. Detailed Description of the Embodiments

[0056] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0057] As Figures 1 to 4As shown in the figure, 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, and a fresh air outlet 111 is provided on the indoor unit housing 11. The 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, and the indoor side air outlet 21 is arranged opposite to the fresh air outlet 111. The outdoor unit 30 and the fresh air duct 40. The outdoor unit 30 includes an outdoor unit housing 31 and an outdoor heat exchanger 32 installed in the outdoor unit housing 31. A heat exchange port 311 opposite to the outdoor heat exchanger 32 is provided on the outdoor unit housing 31. The fresh air duct 40 has a first communication port 41 and a second communication port 42 arranged at intervals. The first communication port 41 is communicated with the outdoor side air outlet 22, and the second communication port 42 is located at the side of the heat exchange port 311 or is arranged facing the heat exchange port 311. Among them, the fresh air module 20 has a fresh air introduction state and a defrosting state. When the fresh air module 20 is in the fresh air introduction state, the outdoor side air outlet 22 intakes air and the indoor side air outlet 21 discharges air. When the fresh air module 20 is in the defrosting state, the outdoor side air outlet 22 discharges air and the indoor side air outlet 21 intakes air.

[0058] When using the air conditioner provided by the embodiment of the present invention to defrost the frost on the outdoor heat exchanger 32, the fresh air module 20 is set to the defrosting state, and the air flows out through the outdoor side air outlet 22 and intakes air through the indoor side air outlet 21. In this way, the air flowing out through the outdoor side air outlet 22 can flow out through the second communication port 42 of the fresh air duct 40, so that the indoor air with a higher temperature in the room can be vertically directed to the outdoor heat exchanger 32 through the heat exchange port 311, thereby facilitating the defrosting effect on the outdoor heat exchanger 32 by the indoor air with a higher temperature. By the above method, the number of times the air conditioner enters the defrosting mode can be reduced, and it is even possible that the air conditioner does not need to enter the defrosting mode, thereby avoiding the situation that the air conditioner cannot operate normally for heating due to entering the defrosting mode more frequently, resulting in the inability to continuously supply heat to the room, and further resulting in poor use comfort. Therefore, through the air conditioner provided by this embodiment, the technical problem that only entering the defrosting mode by the air conditioner in the prior art easily leads to poor use comfort can be solved.

[0059] Specifically, the switching between the fresh air introduction state and the defrosting state of the fresh air module 20 is achieved by switching the air flow direction of the fresh air module 20. When in the fresh air introduction state, the fresh air module 20 is used to introduce fresh air from the outside into the room to improve the comfort of the indoor air. When in the defrosting state, the fresh air module 20 is used to introduce the hot air in the room to the outdoor heat exchanger 32 to improve the defrosting effect on the outdoor heat exchanger 32.

[0060] In this embodiment, the fresh air module 20 further includes a fresh air fan 23, and the fresh air fan 23 has a first rotation state and a second rotation state with opposite rotation directions; when the fresh air module 20 is in the state of introducing fresh air, 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 such a setting, it is only necessary to switch the rotation state of the fresh air fan 23 to achieve the switching between the fresh air introduction state and the defrosting state of the fresh air fan 23, which is convenient for switching the state of the fresh air fan 23, and thus facilitates ensuring stable fresh air introduction or defrosting.

[0061] It should be noted that when the fresh air fan 23 is in the first rotation state, the fresh air fan 23 rotates forward (clockwise or counterclockwise); when the fresh air fan 23 is in the second rotation state, the fresh air fan 23 rotates backward (counterclockwise or clockwise). Specifically, when the fresh air fan 23 rotates forward, the corresponding motor rotates forward, which means that the fresh air fan motor starts to rotate forward, and the air circulation channel is in the way of taking in air from the outdoor side air outlet 22 and discharging air from the indoor side air outlet 21, sucking in outdoor fresh air and discharging indoor air through gaps such as doors and windows, forming air replacement. When the fresh air fan 23 rotates backward, the corresponding motor rotates in reverse: it means that the fresh air fan motor starts to rotate in reverse, and the air circulation channel is in the way of taking in air from the indoor side air outlet 21 and discharging air from the outdoor side air outlet 22, discharging indoor air through the air duct, forming a slightly negative pressure area indoors, and sucking in outdoor fresh air through gaps such as doors and windows, forming air replacement.

[0062] Specifically, the fresh air module 20 further includes a fresh air housing, and the fresh air fan 23 is arranged inside the fresh air housing. Specifically, an indoor side air outlet 21 and an outdoor side air outlet 22 can be respectively arranged on both sides of the fresh air housing.

[0063] Specifically, in other embodiments, the switching between the fresh air introduction state and the defrosting state of the fresh air module 20 can also be achieved in different ways. Specifically, the fresh air module 20 can also be provided with two spaced-apart air cavities, one air cavity is provided with one fan, and the other air cavity is provided with another fan, and the switching is achieved by combining the opening and closing of the two air cavities with the opening and closing of the corresponding fans. Or, the fresh air module 20 can also include a fan and an air extraction pump, the rotation direction of the fan is single, the rotation of the fan is used to achieve the fresh air introduction state, and the operation of the air extraction pump is used to achieve the defrosting state.

[0064] In this embodiment, the second communication port 42 is located at 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. In this way, it is convenient to introduce the air with a higher temperature in the room to the heat exchange port 311 through the second communication port 42, so as to ensure the defrosting effect of the heat exchanger at the heat exchange port 311, and to enable the air conditioner to operate normally in the heating mode.

[0065] Specifically, the fresh air duct 40 further has a fresh air inlet 43. The fresh air inlet 43 is located on the outdoor side of the fresh air duct 40, and the fresh air inlet 43 is arranged at an interval from the second communication port 42; when the fresh air module 20 is in the fresh air state, the second communication port 42 is closed and the fresh air inlet 43 is opened. With such a structural arrangement, it can be avoided that when the fresh air module 20 is in the fresh air introduction state in the heating mode, the relatively cold air near the fresh air inlet 43 is introduced into the room, resulting in a large decrease in the indoor air temperature due to the too low temperature of the introduced indoor air, thereby affecting the comfort of the indoor air. Correspondingly, when the fresh air module 20 is in the fresh air introduction state in the cooling mode, it will also try to avoid introducing the relatively hot air at the outdoor heat exchanger 32 into the room, and thus can also ensure the comfort of the indoor air to a certain extent.

[0066] Specifically, the fresh air inlet 43 is located on the side of the fresh air duct 40 away from the outdoor heat exchanger 32. In this way, it is convenient to make the fresh air inlet 43 as far away from the outdoor heat exchanger 32 as possible, and then it is convenient to introduce the air at a relatively far distance from the outdoor heat exchanger 32 into the room as much as possible. In this way, the temperature of the introduced fresh air will be affected by the heat exchange of the outdoor heat exchanger 32, resulting in a lower or higher temperature. To a certain extent, it can be avoided as much as possible that the temperature of the fresh air introduced into the room is too low when heating is required and the temperature of the fresh air introduced into the room is too high when cooling is required, so as to ensure the fresh air introduction effect.

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

[0068] Wherein, the first side plate 452 and the mounting plate 451 are arranged at a preset angle, and the second communication port 42 is provided on the first side plate 452. With such a structural arrangement, it can be convenient to optimize the setting position of the second communication port 42, and make the second communication port 42 as close to the outdoor heat exchanger 32 as possible, so as to ensure the defrosting effect on the outdoor heat exchanger 32.

[0069] Specifically, the second side plate 453 is disposed opposite to the mounting plate 451, and an air inlet for fresh air 43 is provided on the second side plate 453. With such a structural arrangement, it is convenient to optimize the setting position of the air inlet for fresh air 43, and try to make the fresh air introduced by the air inlet for fresh air 43 not affected by the heat exchange of the outdoor heat exchanger 32, avoid the situation of too large a temperature difference between the fresh air and the indoor air, and ensure the comfort of introducing fresh air as much as possible.

[0070] In this embodiment, the fresh air duct 40 further includes a first wind baffle, which is movably disposed at the second communication port 42 to block or avoid the second communication port 42. In this way, by controlling the movement of the first wind baffle, it is convenient to realize the switching of the state of the fresh air module 20.

[0071] The fresh air duct 40 further includes a second wind baffle, which is movably disposed at the air inlet for fresh air 43 to block or avoid the air inlet for fresh air 43. With such a structural arrangement, by controlling the movement of the second wind baffle, it is convenient to realize the opening and closing of the second communication port 42 and the air inlet for fresh air 43 according to different states of the fresh air module 20.

[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 wind baffle to rotate or move to block or avoid, and the second electric drive unit drives the second wind baffle to rotate or move to block or avoid. The first electric drive unit and the second electric drive unit are both electrically connected to the control module. The control module controls the first electric drive unit and the second electric drive unit according to the confirmed information on whether defrosting of the heat exchanger is required, so as to realize the control of the first wind baffle and the second wind baffle, and further facilitate the opening and closing of the second communication port 42 and the air inlet for fresh air 43 according to different states of the fresh air module 20.

[0073] In this embodiment, the indoor unit 10 further includes an air duct module for providing heat exchange air to the room.

[0074] Specifically, in one embodiment, the fresh air chamber of the fresh air module 20 is not communicated with the heat exchange chamber 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 does not affect the air in the heat exchange chamber, and they proceed separately.

[0075] In another embodiment, the fresh air chamber of the fresh air module 20 is communicated with the heat exchange chamber of the air duct module. In this way, it is convenient to ensure that the air entering the room can pass through the heat exchange chamber, reduce the temperature difference between the fresh air entering the room and the indoor air, and improve the use comfort. In addition, in the defrosting state, it is also convenient to effectively ensure the increase of the temperature of the air used for defrosting, thereby improving the defrosting effect.

[0076] In yet another embodiment, the fresh air cavity of the fresh air module 20 can be selectively connected or disconnected from the heat exchange cavity of the air duct module; 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. With such a setting, it is convenient 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 the comfort of use. When the fresh air module 20 is in the defrosting state, it avoids the situation that the defrosting air affects the temperature of the heat exchange cavity, ensuring that the temperature of the heat exchange cavity is not affected, and thus facilitating the guarantee of the comfort of indoor users.

[0077] Embodiment 2 of the present invention provides a control method for an air conditioner, which is applicable to the air conditioner provided above. The control method of the air conditioner includes: obtaining the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions; determining whether to control the fresh air module 20 of the air conditioner to switch to the fresh air intake state or the defrosting state according to the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions. With such a method, it is convenient to determine whether the outdoor heat exchanger 32 of the air conditioner is frosted, and when the outdoor heat exchanger 32 is frosted, switch the fresh air module 20 to the defrosting state; when the outdoor heat exchanger 32 is not frosted, control the fresh air module 20 to switch to the fresh air intake state according to the user's setting or the mode setting.

[0078] In one embodiment, determining whether to control the fresh air module 20 of the air conditioner to switch to the fresh air intake state or the defrosting state according to 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 the defrosting mode, controlling the fresh air module 20 to be in the defrosting state; when the air conditioner is in the cooling mode or the heating mode, controlling the fresh air module 20 to be in the fresh air intake state. With such a method, it is convenient to reduce the time for the air conditioner to be in the defrosting mode, so as to reduce the interruption time of the heating mode of the air conditioner, and thus facilitate the improvement of the indoor air comfort.

[0079] In another embodiment, determining whether to control the fresh air module 20 of the air conditioner to switch to the fresh air intake state or the defrosting state according to 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 the heating mode, controlling the fresh air module 20 of the air conditioner to switch to the fresh air intake state or the defrosting state according to the indoor and outdoor temperature conditions. With such a method, it is possible to first perform defrosting treatment through the defrosting state of the fresh air module 20 when the outdoor heat exchanger 32 is frosted, avoiding the situation that the heating mode is aborted by directly switching the air conditioner to the defrosting mode, thereby improving the operating stability of the air conditioner and also improving the comfort of use for users.

[0080] Specifically, controlling the fresh air module 20 of the air conditioner to switch to the fresh air intake state or the defrosting state according to the indoor and outdoor temperature conditions includes: obtaining the indoor-outdoor temperature difference value Δt and the outdoor temperature T, comparing the indoor-outdoor temperature difference Δt with the preset indoor-outdoor temperature difference Δt0, and comparing the outdoor temperature T with the preset outdoor temperature T0; when T < T0 and Δt > Δt0, controlling the fresh air module 20 to switch to the defrosting state. By adopting such a method, it is possible to further improve the accuracy of the switching control of the fresh air module 20, so as to accurately determine whether the outdoor heat exchanger 32 is in a frosting state, and so as to first process it through the defrosting state of the fresh air module 20 when the outdoor heat exchanger 32 needs defrosting. Specifically, Δt0 can be 10°C to 17°C, and T0 is -8°C to -2°C. Specifically, the indoor-outdoor temperature difference values Δt and Δt0 are values greater than or equal to zero. Preferably, Δt0 can be 15°C, and T0 is -5°C.

[0081] In all of the above embodiments, the control method further includes: obtaining the rotation speed of the outdoor fan of the air conditioner; adjusting the rotation speed of the fresh air fan 23 of the fresh air module 20 in the defrosting state according to the rotation speed of the outdoor fan. In this way, it is possible to make the rotation speed of the fresh air fan 23 of the fresh air module 20 adapt to the rotation speed of the outdoor fan, so as to ensure the defrosting effect on the outdoor heat exchanger 32. Specifically, when the rotation speed of the outdoor fan is low, control the rotation speed of the fresh air fan 23 to be low; when the rotation speed of the outdoor fan is high, control the rotation speed of the fresh air fan 23 to be high.

[0082] Specifically, adjusting the rotation speed of the fresh air fan 23 of the fresh air module 20 in the defrosting state according to the rotation speed of the outdoor fan includes: when the rotation speed of the outdoor fan is operating at the first high wind speed gear, controlling the fresh air fan 23 to operate at the second high wind speed gear; when the rotation speed of the outdoor fan is operating at the first medium wind speed gear, controlling the fresh air fan 23 to operate at the second medium wind speed gear; when the rotation speed of the outdoor fan is operating at the first low wind speed gear, controlling the fresh air fan 23 to operate at the second low wind speed gear; where the rotation speed of the first high wind speed gear is greater than the rotation speed of the first medium wind speed gear, and the rotation speed of the first medium wind speed gear is greater than the rotation speed of the first low wind speed gear; the rotation speed of the second high wind speed gear is greater than the rotation speed of the second medium wind speed gear, and the rotation speed of the second medium wind speed gear is greater than the rotation speed of the second low wind speed gear. By adopting such a setting, it is possible to make the wind speed gear of the fresh air fan 23 adapt to the wind speed gear of the outdoor fan, so as to correspondingly increase the relatively hot air introduced into the outdoor heat exchanger 32 from the indoor when the rotation speed of the outdoor fan is high (corresponding to a generally more serious frosting situation), and thus effectively improve the defrosting effect on the outdoor heat exchanger 32. When the rotation speed of the outdoor fan is low (corresponding to a generally lighter frosting situation), correspondingly reduce the relatively hot air introduced into the outdoor heat exchanger 32 from the outdoor to avoid affecting the indoor temperature.

[0083] As Figure 5As shown, the air conditioner operates in heating mode and the fresh air unit is turned on. The air conditioner detects the outdoor ambient temperature T1 and makes a judgment based on the above conditions. The specific control method is as follows:

[0084] First, judge the outdoor temperature T. When the outdoor temperature T ≤ -5°C, the fresh air unit motor starts to rotate in reverse, and the air circulation passage is in the mode of taking in air from the indoor side air outlet 21 and discharging air from the outdoor side air outlet 22. The control logic principle is as follows:

[0085] When the outdoor temperature T < -5°C, generally the indoor temperature is above 10°C, and the temperature difference is relatively large, generally greater than 15°C. This will cause a large amount of condensed water to appear inside the fresh air component and at the air outlet due to heat exchange, and it will also affect indoor comfort. Therefore, it is not suitable to directly introduce it into the room, so the motor reverse rotation mode is adopted. When the outdoor temperature T < -5°C, the surface temperature of the condenser of the outdoor unit 30 (corresponding to the outdoor heat exchanger 32) is lower due to heat exchange, and the moisture in the environment is easily condensed into frost on the condenser, affecting the heating of the air conditioner.

[0086] Enter the next judgment condition; when the outdoor fan is set to high speed, it is judged that the indoor load is large and more heat exchange is required. At this time, the surface temperature of the condenser will quickly decrease. To ensure that the temperature is higher than the frosting temperature, more heat is needed, so the motor speed is adjusted to high speed operation; when the outdoor fan is set to medium speed, the motor speed is adjusted to medium speed operation; when the outdoor fan is set to low speed, the motor speed is adjusted to low speed operation; when the outdoor temperature T > -5°C, the fresh air unit motor starts to rotate forward, and the air circulation passage is in the mode of taking in air from the outdoor side air outlet 22 and discharging air from the indoor side air outlet 21, sucking in outdoor fresh air and discharging indoor air through gaps such as doors and windows to form air replacement.

[0087] When the air conditioner operates in cooling mode and the fresh air unit is turned on, the fresh air unit motor starts to rotate forward, and the air circulation passage is in the mode of taking in air from the outdoor side air outlet 22 and discharging air from the indoor side air outlet 21, sucking in outdoor fresh air and discharging indoor air through gaps such as doors and windows to form air replacement.

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

[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 control of different fresh air flow directions in different environments is realized; in the low-temperature heating mode, the indoor and outdoor air temperatures are detected in real time, and through the judgment of the main control system (corresponding to the control module), if the condition for the condenser to frost is reached, the fresh air fan direction is adjusted, and the high-temperature air on the indoor side is led out to the condenser to solve the frosting risk of the condenser, and at the same time meet the demand for introducing fresh air; the switching device at the outdoor end air duct air outlet (including the second communication port and the fresh air intake port) can realize the air outlet switching. The following technical problems are solved: the problem of fresh air condensation in the fresh air air conditioner in the low-temperature heating mode is solved; the problem that the outdoor unit condenser is prone to frosting in the low-temperature heating mode of the air conditioner is solved.

[0090] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" 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 arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0092] In the description of the present application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the outline of each component itself.

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

[0094] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present application.

[0095] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air conditioner, characterized in that, Comprising: An indoor unit (10), including an indoor unit housing (11), and a fresh air outlet (111) is provided on the indoor unit housing (11); A fresh air module (20), installed on the indoor unit (10), the fresh air module (20) having an indoor side air outlet (21) and an outdoor side air outlet (22) arranged at intervals, and 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), the outdoor unit (30) including an outdoor unit housing (31) and an outdoor heat exchanger (32) installed inside the outdoor unit housing (31), and a heat exchange port (311) arranged opposite to the outdoor heat exchanger (32) is provided on the outdoor unit housing (31); the fresh air duct (40) has a first communication port (41) and a second communication port (42) arranged at intervals, the first communication port (41) is communicated with the outdoor side air outlet (22), and the second communication port (42) is located at the side of the heat exchange port (311) or is arranged facing the heat exchange port (311); Wherein, the fresh air module (20) has a fresh air introduction state and a defrosting state; when the fresh air module (20) is in the fresh air introduction state, the outdoor side air outlet (22) intakes air and the indoor side air outlet (21) discharges air; when the fresh air module (20) is in the defrosting state, the outdoor side air outlet (22) discharges air and the indoor side air outlet (21) intakes air.

2. The air conditioner according to claim 1, characterized in that The fresh air module (20) further includes: A fresh air fan (23), the fresh air fan (23) having a first rotation state and a second rotation state with opposite rotation directions; when the fresh air module (20) is in the fresh air introduction 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 at the side of the heat exchange port (311), and the axis of the second communication port (42) is inclined at a preset angle with respect to the axis of the heat exchange port (311) or is perpendicular or parallel or coincident.

4. The air conditioner according to claim 1, wherein The fresh air duct (40) further has a fresh air intake port (43), the fresh air intake port (43) is located on the outdoor side of the fresh air duct (40), and the fresh air intake port (43) is arranged at intervals with the second communication port (42); when the fresh air module (20) is in the fresh air state, the second communication port (42) is closed and the fresh air intake port (43) is opened.

5. The air conditioner according to claim 4, characterized in that, The fresh air intake port (43) is located on the side of the fresh air duct (40) away from the outdoor heat exchanger (32).

6. The air conditioner according to claim 4, characterized in that, The fresh air duct (40) includes a pipe body part (44) and a connecting part (45) connected to each other. One end of the pipe body part (44) far from the connecting part (45) is provided with the second connecting port (42). 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 is located at the side of the heat exchange port (311). Wherein, the first side plate (452) and the mounting plate (451) are arranged at a preset angle, and the second connecting port (42) is provided on the first side plate (452); and / or, The second side plate (453) is arranged opposite to the mounting plate (451), and the fresh air inlet (43) is provided on the second side plate (453).

7. The air conditioner according to claim 4, wherein, The fresh air duct (40) further includes: A first wind baffle, movably arranged at the second connecting port (42) to block or avoid the second connecting port (42); and / or, A second wind baffle, movably arranged at the fresh air inlet (43) to block or avoid the fresh air inlet (43).

8. The air conditioner according to claim 1, characterized in that, The indoor unit (10) further includes an air duct module for providing heat exchange air to the room; Wherein, 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) can be selectively connected or disconnected from the heat exchange cavity of the air duct module; 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.

9. A control method for an air conditioner, characterized in that, Applicable to the air conditioner according to any one of claims 1 to 8, the control method of the air conditioner includes: Obtaining the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions; Determining whether to switch the fresh air module of the air conditioner to the fresh air intake state or the defrosting state according to the operating mode of the air conditioner, or the operating mode of the air conditioner and the indoor and outdoor temperature conditions.

10. The control method of the air conditioner according to claim 9, characterized in that, The determining whether to switch the fresh air module of the air conditioner to the fresh air intake state or the defrosting state according to 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 the defrosting mode, controlling the fresh air module to be in the defrosting state; when the air conditioner is in the cooling mode or the heating mode, controlling the fresh air module to be in the fresh air intake state.

11. The control method of the air conditioner according to claim 9, characterized in that, The determining whether to switch the fresh air module of the air conditioner to the fresh air intake state or the defrosting state according to 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 the heating mode, control the fresh air module of the air conditioner to switch to the fresh air intake state or the defrosting state according to the indoor and outdoor temperature conditions.

12. The control method of the air conditioner according to claim 11, wherein, The control of the fresh air module of the air conditioner to switch to the fresh air intake state or the defrosting state according to the indoor and outdoor temperature conditions includes: Obtain the indoor-outdoor temperature difference value △t and the outdoor temperature T, and compare the indoor-outdoor temperature difference △t with a preset indoor-outdoor temperature difference △t0, and compare the outdoor temperature T with a preset outdoor temperature T0; When T < T0 and △t > △t0, control the fresh air module to switch to the defrosting state.

13. The control method of the air conditioner according to claim 9, characterized in that, The control method further includes: Obtain the rotation speed of the outdoor fan of the air conditioner; Adjust the rotation speed of the fresh air fan of the fresh air module in the defrosting state according to the rotation speed of the outdoor fan.

14. The control method of the air conditioner according to claim 13, wherein, The adjustment of the rotation speed of the fresh air fan of the fresh air module in the defrosting state according to the rotation speed of the outdoor fan includes: When the rotation speed of the outdoor fan is in the first high wind gear operation, control the fresh air fan to operate in the second high wind gear; When the rotation speed of the outdoor fan is in the first medium wind gear operation, control the fresh air fan to operate in the second medium wind gear; When the rotation speed of the outdoor fan is in the first low wind gear operation, control the fresh air fan to operate in the second low wind gear; Wherein, the rotation speed of the first high wind gear is greater than the rotation speed of the first medium wind gear, and the rotation speed of the first medium wind gear is greater than the rotation speed of the first low wind gear; the rotation speed of the second high wind gear is greater than the rotation speed of the second medium wind gear, and the rotation speed of the second medium wind gear is greater than the rotation speed of the second low wind gear.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program, when running, executes the control method according to any one of claims 9 to 14.

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