Air conditioner and control method thereof

Abstract

The application discloses an air conditioner and a control method thereof. The air conditioner judges whether intermittent odor is generated by monitoring environmental humidity, indoor coil temperature, cooling operation time length, heating operation time length and other factors, so as to adjust the air outlet direction of the air deflector, avoid the concentration of odor substances being too high in a local space, and weaken the odor. The air conditioner of the application does not need to increase additional odor detection devices when realizing the odor detection logic, and does not need to be matched with an odor removal device in the process of weakening the odor. Whether the odor is generated can be judged only by the existing monitoring mode of the air conditioner, and the air direction of the air deflector of the air conditioner is controlled, so that the intermittent odor can be weakened, and even the user cannot feel the effect of the odor, the production cost of the air conditioner is saved, and the user experience is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly to an air conditioner and a control method thereof. BACKGROUND

[0002] With the improvement of people's living standards, the use frequency of air conditioners is getting higher and higher, and the user demand is also changing from cooling and heating to more comprehensive comfort. In a relatively closed environment, the odor brought by the air conditioner supply air greatly affects the user's comfort experience. The current solutions to air conditioner odor mainly include using filtering devices, cleaning internal components such as air conditioner heat exchangers, etc. The above-mentioned solutions can solve the odor caused by the accumulation of pollutants or the breeding of mold due to long-term use of the air conditioner to a certain extent. However, once the filtering device is damaged or the air conditioner heat exchanger and other components are not cleaned for a long time, the high-concentration odor gas will directly blow on the user, causing the user experience to decrease. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide an air conditioner and a control method thereof, which can determine whether the air conditioner has intermittent odor by monitoring environmental humidity, indoor coil temperature, cooling operation time and heating operation time, and adjust the air outlet direction of the air deflector to avoid the odor directly blowing on the user, thereby achieving the effect of weakening the odor.

[0004] To achieve the above-mentioned purpose, the embodiments of the present application provide an air conditioner, comprising:

[0005] An indoor unit for heat exchange with indoor air, wherein an indoor heat exchanger is arranged in the indoor unit;

[0006] An outdoor unit for heat exchange with outdoor air, wherein an outdoor heat exchanger, a compressor, a four-way valve and an expansion valve are arranged in the outdoor unit, and the outdoor heat exchanger, the compressor, the four-way valve, the expansion valve and the indoor heat exchanger are connected by pipelines to form a refrigerant circulation loop;

[0007] An indoor coil temperature sensor arranged in the indoor unit for detecting the indoor coil temperature of the indoor heat exchanger;

[0008] An air deflector arranged at the air outlet of the indoor unit for controlling the air direction of the air outlet;

[0009] A controller configured to:

[0010] Obtain the indoor environmental humidity, and when it is detected that the environmental humidity is lower than a preset humidity threshold, obtain the indoor coil temperature sent by the indoor coil temperature sensor;

[0011] accumulate each running time length of the air conditioner when the indoor coil temperature is in several low temperature ranges during the decrease of the indoor coil temperature;

[0012] when the air conditioner meets preset temperature rising conditions, calculate total running time length according to each running time length;

[0013] when the total running time length exceeds preset running time length initial threshold, control the air deflector to operate.

[0014] As an improvement of the above scheme, when the air conditioner meets preset temperature rising conditions, calculating total running time length according to each running time length comprises:

[0015] when the indoor coil temperature is in the rising process, judge whether the indoor coil temperature reaches high temperature threshold;

[0016] when the indoor coil temperature reaches high temperature threshold, accumulate temperature rising time length when the indoor coil temperature rises from the low temperature initial threshold to the high temperature threshold;

[0017] when the temperature rising time length is less than preset temperature rising time length threshold, determine that the air conditioner does not meet odor generation conditions; when the temperature rising time length is greater than or equal to the temperature rising time length threshold, calculate total running time length according to each running time length.

[0018] As an improvement of the above scheme, calculating total running time length according to each running time length comprises:

[0019] obtain weight value corresponding to the low temperature range;

[0020] calculate the product of the weight value corresponding to the low temperature range and the running time length;

[0021] add the products corresponding to several low temperature ranges to obtain the total running time length.

[0022] As an improvement of the above scheme, the air conditioner is preset with several running time length ranges, and each running time length range has its corresponding air deflector wind direction control time length; then, after the total running time length exceeds preset running time length initial threshold, the controller is further used for:

[0023] determine the running time length range corresponding to the total running time length to obtain target wind direction control time length of the air deflector;

[0024] control the air deflector to swing according to preset wind direction swing logic within the target wind direction control time length.

[0025] As an improvement of the above scheme, the air conditioner further comprises:

[0026] A humidity sensor is arranged in the indoor unit to detect the ambient humidity of the indoor environment.

[0027] As an improvement of the above scheme, the air deflector comprises a transverse air deflector and a longitudinal air deflector, and the air direction swinging logic is that the transverse air deflector is lifted upward, and the longitudinal air deflector swings left and right according to a set program.

[0028] To achieve the above object, the embodiment of the present application further provides an air conditioner control method, comprising:

[0029] The ambient humidity is acquired, and when it is detected that the ambient humidity is lower than a preset humidity threshold, the indoor coil temperature is acquired;

[0030] When it is detected that the indoor coil temperature decreases to a preset low temperature initial threshold, the running time length of the air conditioner in each low temperature range when the indoor coil temperature is in the low temperature range during the decrease of the indoor coil temperature is accumulated;

[0031] When the air conditioner meets a preset temperature rising condition, the total running time length is calculated according to the running time length;

[0032] When the total running time length exceeds a preset running time length initial threshold, the air deflector in the air conditioner is controlled to run.

[0033] Compared with the prior art, the air conditioner and the control method thereof disclosed by the embodiment of the present application can determine whether the air conditioner produces intermittent odor by monitoring the ambient humidity, the indoor coil temperature, the cooling running time length and the temperature rising running time length, so as to adjust the air deflection direction of the air deflector, avoid that the concentration of odor substances is too high in a local space, and weaken the odor. The air conditioner of the present application does not need to increase additional odor detection devices when the odor detection logic is implemented, and does not need to be matched with an odor removal device in the process of weakening the odor. Only by using the existing monitoring mode of the air conditioner, whether the odor is produced can be determined, and by controlling the air deflection direction of the air conditioner, the intermittent odor can be weakened, even the user cannot feel the odor, the production cost of the air conditioner is saved, and the user experience is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a structural schematic diagram of an air conditioner provided by the embodiment of the present application;

[0035] Figure 2 is a structural schematic diagram of a refrigeration system in an air conditioner provided by the embodiment of the present application;

[0036] Figure 3 is a structural schematic diagram of an air deflector in an air conditioner provided by the embodiment of the present application;

[0037] Figure 4 is a sectional view of an indoor unit provided by an embodiment of the present application;

[0038] Figure 5 is a first working flow chart of a controller in an air conditioner provided by an embodiment of the present application;

[0039] Figure 6 is a second working flow chart of a controller in an air conditioner provided by an embodiment of the present application;

[0040] Figure 7 is a schematic diagram of a wind guide range of a horizontal air deflector in an air conditioner provided by an embodiment of the present application;

[0041] Figure 8 is a schematic diagram of upward air deflection of a horizontal air deflector in an air conditioner provided by an embodiment of the present application;

[0042] Figure 9 is a schematic diagram of air blowing in a room of an air conditioner provided by an embodiment of the present application;

[0043] Figure 10 is a third working flow chart of a controller in an air conditioner provided by an embodiment of the present application;

[0044] Figure 11 is a complete flow chart of a controller in an air conditioner provided by an embodiment of the present application;

[0045] Figure 12 is a flow chart of an air conditioner control method provided by an embodiment of the present application.

[0046] wherein, 100, indoor unit; 200, outdoor unit; 11, compressor; 12, four-way valve; 13, outdoor heat exchanger; 14, expansion valve; 15, indoor heat exchanger; 16, indoor fan; 17, outdoor fan; 18, outdoor coil temperature sensor; 19, outdoor ambient temperature sensor; 20, indoor coil temperature sensor; 111, horizontal air deflector; 112, vertical air deflector; 10A, air outlet; 10B, air inlet; 101, shell; 102, indoor fan; 1031, coil; 1032, fin. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0048] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise specified.

[0050] In the description of the present application, it needs to be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] Referring to Figure 1 , Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present application. The air conditioner described in the embodiment of the present application comprises an indoor unit 100 and an outdoor unit 200. The indoor unit 100 is used to adjust the temperature and humidity of indoor air. The outdoor unit 200 is connected with the indoor unit 100 through a connection pipe. The outdoor unit 200 is installed outdoors. The indoor unit 100 is installed indoors.

[0052] Referring to Figure 2 , Figure 2 is a structural schematic diagram of a refrigeration system of an air conditioner provided by an embodiment of the present application. The air conditioner comprises a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a throttling device 14, an indoor heat exchanger 15, an indoor fan 16, an outdoor fan 17, an outdoor coil temperature sensor 18, an outdoor environment temperature sensor 19, and an indoor coil temperature sensor 20. Among them, the indoor heat exchanger 15, the indoor fan 16, and the indoor coil temperature sensor 20 are arranged on the indoor unit 100. The compressor 11, the four-way valve 12, the outdoor heat exchanger 13, the throttling device 14, the outdoor fan 17, the outdoor coil temperature sensor 18, and the outdoor environment temperature sensor 19 are arranged on the outdoor unit.

[0053] The air conditioner described in this embodiment of the invention includes cooling and heating modes. In cooling mode, the refrigerant first passes through compressor 11 to become a high-pressure gas, then passes through outdoor heat exchanger 13 (condenser) to condense and release heat, becoming a high-pressure liquid. This high-pressure liquid passes through throttling device 14, becoming a low-temperature, low-pressure liquid. It then passes through indoor heat exchanger 15 (evaporator) to evaporate and absorb heat, becoming a low-temperature, low-pressure gas, and finally returns to compressor 11. In heating mode, the refrigerant first passes through compressor 11 to become a high-pressure gas, then passes through indoor heat exchanger 15 (condenser) to condense and release heat, becoming a high-pressure liquid. This high-pressure liquid passes through expansion valve, becoming a low-temperature, low-pressure liquid. This low-temperature, low-pressure liquid passes through outdoor heat exchanger 13 (evaporator) to evaporate and absorb heat, becoming a low-temperature, low-pressure gas, and finally returns to compressor 11. The outdoor ambient temperature sensor 19 detects the outdoor ambient temperature, and the indoor coil temperature sensor 20 detects the indoor coil temperature of indoor heat exchanger 15.

[0054] For example, the refrigerant flows differently during cooling and heating. In cooling mode, it first flows through the outdoor unit's heat exchanger, where the outdoor unit acts as the condenser and the indoor unit as the evaporator. In heating mode, the refrigerant first flows through the indoor unit's heat exchanger, where the indoor unit acts as the condenser and the outdoor unit as the evaporator. The air conditioner uses a four-way valve to change the refrigerant flow direction during these different modes. Without a four-way valve, the air conditioner could only perform either cooling or heating, and could not switch between cooling and heating modes.

[0055] See Figure 3 , Figure 3 This is a schematic diagram of the structure of the air guide plate in the air conditioner provided in the embodiment of the present invention; at least one horizontal air guide plate 111 extending relatively long in the left-right direction is provided on the air outlet 10A of the air conditioner. Figure 3 The diagram shows one horizontal air guide plate (but there can actually be two or three). These horizontal air guide plates 111 are rotatably mounted on the housing of the indoor unit 100. Deep within the air outlet 10A, there are multiple vertical air guide plates 112 with planes intersecting the left-right direction. A motor drives the vertical air guide plates 112 to rotate left and right around a rotation center extending in the vertical direction (intersecting the left-right direction). These multiple vertical air guide plates 112 adjust the direction of the airflow from the air outlet 10A. There can be multiple horizontal air guide plates 111 and vertical air guide plates 112. During airflow guidance, they rotate along the same trajectory and are nearly parallel to each other, resulting in smooth airflow from the air outlet 10A.

[0056] See Figure 4 , Figure 4is a sectional view of an indoor unit 100 according to an embodiment of the present application, the indoor unit 100 comprising a housing 101, an indoor fan 102, and an indoor heat exchanger 15.

[0057] The housing 101 is in the shape of a box extending in length (hereinafter also referred to as left-right direction) and having a plurality of openings. A plurality of air inlets 10B are provided on a top surface of the housing 101, and indoor air in the vicinity of the air inlets 10B is drawn into the interior of the housing 101 by driving of the indoor fan 102. The indoor air drawn from the air inlets 10B is delivered to the indoor fan 102 through the indoor heat exchanger 15. An air outlet 10A is formed on a bottom surface of the housing 101, and the air outlet 10A is connected to the interior of the housing 101 through a scroll flow path continuous from the indoor fan 102. The indoor air drawn from the air inlets 10B is heat-exchanged by the indoor heat exchanger 15, and then blown out to the interior of the room through the air outlet 10A through the scroll flow path.

[0058] The indoor heat exchanger 15 is composed of a plurality of fins and a coil pipe 1032 penetrating through the plurality of fins 1031, and functions as an evaporator or a radiator according to the operation state of the indoor unit 100, so that heat exchange is performed between refrigerant flowing in the coil pipe and air passing through the indoor heat exchanger 15.

[0059] The indoor fan 102 is located at a substantially central portion inside the housing 101, and is a cross-flow fan in a substantially cylindrical shape extending in the length direction (left-right direction) of the indoor unit 100. By rotatingly driving the indoor fan 102, indoor air is drawn from the air inlets 10B, and conditioned air generated by passing through the indoor heat exchanger 15 after passing through the air filter is blown out to the interior of the room from the air outlet 10A. The greater the rotation speed of the indoor fan 102, the greater the air volume of the conditioned air blown out from the air outlet 10A.

[0060] In the embodiment of the present application, the controller is configured to: acquire an indoor environment humidity, acquire an indoor coil temperature sent by the indoor coil temperature sensor when it is detected that the indoor environment humidity is lower than a preset humidity threshold, accumulate a running time of the air conditioner when the indoor coil temperature is in a plurality of low-temperature ranges during a decrease of the indoor coil temperature when it is detected that the indoor coil temperature decreases to a preset low-temperature initial threshold, calculate a total running time according to the running time when the air conditioner satisfies a preset temperature-rising condition, and control the air deflector to operate when the total running time exceeds a preset running time initial threshold.

[0061] For example, referring to Figure 5, Figure 5 is a first working flow chart of a controller in an air conditioner provided by an embodiment of the present application, and the controller is used to execute steps S11-S20.

[0062] S11, acquire the environment humidity L, and then enter step S12.

[0063] Exemplarily, there are two ways to acquire the environment humidity, one is that the air conditioner product is equipped with a humidity sensor, at this time the air conditioner further comprises a humidity sensor arranged in the indoor unit for detecting the environment humidity of the indoor environment. The environment humidity monitored by the sensor is L1. The other is that the air conditioner product is not equipped with a humidity sensor, then the local environment humidity is acquired from the network channel by positioning the area position, and is converted into the environment humidity L of the indoor.

[0064] S12, judge whether the indoor environment humidity L is lower than the humidity threshold L1, if yes, enter step S13, if not, enter step S20.

[0065] S13, when the indoor environment humidity L is lower than the humidity threshold L1, acquire the indoor coil temperature T sent by the indoor coil temperature sensor, and then enter step S14.

[0066] Exemplarily, the indoor coil temperature can be acquired once every preset time interval, and the preset time interval can be adjusted by the user or pre-set before the air conditioner is factory-produced, such as 10s or other values, which is not limited here. The generation of odor in dry environment will be more obvious than in humid environment, therefore, when the indoor environment humidity is lower than the humidity threshold L1, the detection mode of determining whether the odor is generated by detecting the coil temperature needs to be started.

[0067] S14, judge whether the indoor coil temperature T is reduced to the low temperature initial threshold T0, if yes, enter step S15, if not, return to step S14.

[0068] S15, when the indoor coil temperature T is reduced to the low temperature initial threshold T0, accumulate the running time of the air conditioner when the indoor coil temperature is in several low temperature ranges in the cooling process of the air conditioner, and then enter step S16.

[0069] Exemplarily, for example, the low temperature range has three, which are T1≤T

[0070] It is worth mentioning that the different low temperature ranges are set here for the purpose of obtaining corresponding weights according to the low temperature ranges subsequently, and the total running time calculated subsequently is not simply the sum of the respective running times, but is obtained by summing the products of the weights and the running times, and the weight can determine the proportion of this running time in the subsequent calculation of the total running time, because both the different running times and the temperatures can affect the amount of the odor substances condensed by the indoor heat exchanger as an evaporator, the condensation speed of the odor substances is proportional to the temperature of the evaporator, and the condensation speed of the odor substances is faster as the temperature of the evaporator gradually decreases. For example, when T1≤T0, the heat exchanger temperature is not very low, and the condensation speed of the odor substances in the air is slow, so even if the maintenance time length of T1≤T0 is very long, the odor substances condensed thereby are not too much, and the total running time calculated subsequently cannot be too long simply because the time length is very long, so the weight is introduced to reduce the proportion of this process, so that the total running time calculated subsequently is reasonable.

[0071] S16, determining whether the air conditioner meets a temperature rising condition, if yes, entering step S17, if not, returning to step S16.

[0072] Specifically, the total running time is calculated according to the respective running times when the air conditioner meets a preset temperature rising condition, including: when the air conditioner is in a temperature rising process, determining whether the indoor coil temperature reaches a high temperature threshold; when the indoor coil temperature reaches the high temperature threshold, accumulating a temperature rising time length when the indoor coil temperature rises from the low temperature initial threshold to the high temperature threshold; when the temperature rising time length is less than a preset temperature rising time length threshold, determining that the air conditioner does not meet an odor generation condition; and when the temperature rising time length is greater than or equal to the temperature rising time length threshold, calculating the total running time according to the respective running times.

[0073] For example, referring to Figure 6 , Figure 6 is a second working flowchart of a controller in the air conditioner provided by the embodiment of the application, and the step S16 specifically includes steps S161-S164.

[0074] S161, determining whether the air conditioner is in a temperature rising process, if yes, entering step S162, if not, returning to step S161.

[0075] For example, the temperature rising process is a process in which the indoor coil temperature is detected to suddenly rise from a straight decrease (with a stable process in the middle).

[0076] S162, determining whether the indoor coil temperature T reaches a high temperature threshold TH, if yes, entering step S163, if not, returning to step S162.

[0077] S163、In the case that the indoor coil temperature T reaches the high temperature threshold TH, the temperature rising duration th when the indoor coil temperature T rises from the low temperature initial threshold T0 to the high temperature threshold TH is accumulated, and then step S164 is entered.

[0078] S164、In the case that the temperature rising duration th is greater than or equal to the temperature rising duration threshold Δth, it is determined that the air conditioner does not meet the odor generation condition; in the case that the temperature rising duration th is less than the temperature rising duration threshold Δth, it is determined that there is a risk of blowing out odor at this time, and the subsequent weakening / eliminating odor operation mode needs to be executed, and the total operation duration Δta is calculated according to each operation duration.

[0079] For example, the reasons for the temperature rising process are as follows: 1) when the air conditioner continuously cools to reach the specified temperature or even below the specified temperature, the compressor performs the frequency reduction operation, at this time, the evaporation temperature rises, and the indoor coil temperature rises; 2) when the air conditioner continuously cools to reach the specified temperature or even below the specified temperature, the compressor stops, and the machine automatically runs the air supply mode; 3) when the air conditioner continuously cools to reach the specified temperature or even below the specified temperature, the user adjusts the cooling mode to the air supply mode through the remote controller.

[0080] In the rising process of the indoor coil temperature, due to the odor substances condensed on the air conditioner heat exchanger at low temperature, the odor substances are rapidly released with the rapid rise of the indoor coil temperature, resulting in high concentration of odor substances blown out, especially blown to the user, which will bring the discomfort experience of blowing odor, therefore, in the case that the temperature rising duration th is greater than or equal to the temperature rising duration threshold Δth, the temperature rising speed is too fast at this time, which causes the rapid release of odor substances, so it is determined that there is a risk of blowing out odor at this time, and the subsequent determination logic is entered; in the case that the temperature rising duration th is less than the temperature rising duration threshold Δth, the temperature rising speed is slow at this time, which will not cause the rapid release of odor substances, so it is determined that the air conditioner does not meet the odor generation condition.

[0081] S17、In the case that the air conditioner meets the preset temperature rising condition, the total operation duration Δta is calculated according to each operation duration, and then step S18 is entered.

[0082] S18、In the case that the total operation duration Δta exceeds the preset operation duration initial threshold M0, step S19 is entered; in the case that the total operation duration Δta is less than the preset operation duration initial threshold M0, step S20 is entered.

[0083] S19、In the case that the total operation duration Δta exceeds the preset operation duration initial threshold M0, the operation duration is too long in the process of the low-temperature condensation of odor substances on the indoor heat exchanger at this time, and there are more odor substances condensed on the indoor heat exchanger at low temperature, so it is determined that the odor generation condition is met, and the air deflector is controlled to operate according to the preset air direction swing logic at this time, so as to send the air blown out of the air outlet to the area far away from the user.

[0084] S20, if the total runtime Δta does not exceed the preset runtime initial threshold M0, the odor generation condition is not met, and the control of the air deflector remains the original control logic.

[0085] For example, the air deflector includes a transverse air deflector and a longitudinal air deflector, and the wind direction swing logic is that the transverse air deflector is lifted up, and the longitudinal air deflector swings left and right according to a set program. For example, refer to Figure 7 , Figure 7 FIG. 1 is a schematic diagram of the air deflection range of a transverse air deflector in an air conditioner according to an embodiment of the present application, the transverse air deflector is used to adjust the up-down wind direction of an air outlet, the up-down swing range of the transverse air deflector is from a to b, and after being lifted up by a preset angle, the swing range is reduced to from a to c. At this time, the air outlet 10A is shown in FIG. 2. Figure 8 , Figure 8 FIG. 3 is a schematic diagram of the upwind deflection of a transverse air deflector in an air conditioner according to an embodiment of the present application. The air outlet of the whole room is shown in FIG. 4. Figure 9 , Figure 9 FIG. 5 is a schematic diagram of the air deflection of an air conditioner in a room according to an embodiment of the present application. At this time, the air blown by the air conditioner is far away from the user, and the odor gas is not directly blown to the user. The air containing odor substances with high concentration is sent to an area far away from the user, and is dispersed to reduce the local area concentration. Since the odor substances originally exist in the air, and the swing of the air deflection mechanism avoids the concentration of the odor substances in the local area, the user will not feel the odor, and the comfort experience is improved.

[0086] Further, if the product is equipped with the air-avoiding function, the activity area of the user can be further detected, and then the air supply area of the air deflector is changed to the non-activity area of the user. For example, an infrared detection device is loaded on the indoor unit 100, the non-activity area of the user is determined based on the historical activity area of the user, and the swing of the air deflector is controlled. At this time, the wind direction swing logic is that the air supply area of the transverse air deflector and the vertical air deflector is changed to the non-activity area of the user.

[0087] In the embodiment of the present application, the total runtime is calculated according to each runtime, which includes: obtaining a weight value corresponding to the low temperature range; calculating the product of the weight value corresponding to the low temperature range and the runtime; and adding the products corresponding to the several low temperature ranges to obtain the total runtime.

[0088] For example, refer to Figure 10 , Figure 10 FIG. 7 is a third working flowchart of a controller in an air conditioner according to an embodiment of the present application. The step S7 includes steps S171-S173.

[0089] S171, a weight value corresponding to the low temperature range is obtained, and then step S172 is entered. For example, the weight value corresponding to the low temperature range T1≤T<T0 is k1, the weight value corresponding to the low temperature range T2≤T<T1 is k2, and the weight value corresponding to the low temperature range T<T2 is k3, wherein k3>k2>k1. The values of k1, k2 and k3 can be set by the user or pre-set before the air conditioner is shipped, which is not specifically limited here.

[0090] S172, the product of the weight value corresponding to the low temperature range and the running time is calculated, and then step S173 is entered.

[0091] S173, the products corresponding to several low temperature ranges are added to obtain the total running time Δta. The formula Δta=k1*Δt1+k2*Δt2+k3*Δt3 is met.

[0092] Further, a plurality of running time ranges are pre-set in the air conditioner, and each running time range has a corresponding air deflector wind direction control time; then, after the total running time exceeds the pre-set running time initial threshold, the controller is further configured to: determine the running time range corresponding to the total running time to obtain the target wind direction control time of the air deflector; and control the air deflector to swing according to the pre-set wind direction swing logic within the target wind direction control time.

[0093] For example, the running time range can include: M0≤Δta≤M1, M1<Δta<M2, and M2≤Δta.

[0094] The wind direction control time of the odor weakening / elimination mode is selected through Δta in the following table. If Δta is extremely short and less than the pre-set value M0, the odor weakening / elimination control mode does not need to be performed. The specific total running time and wind direction control time corresponding relationship can be referred to Table 1.

[0095] Table 1: Corresponding relationship between total running time and wind direction control time

[0096] Δt6 range Δt6 < M0 M0 ≤ Δt6 ≤ M1 M1 < Δt6 < M2 M2 ≤ Δta Wind direction control duration / Δtq Δtw Δte

[0097] In the embodiment of the application, Δtq<Δtw<Δte. When the total running time Δta is longer, it means that there are more odor substances condensed on the indoor heat exchanger for a long time, and therefore the wind direction control time needs to be set longer to avoid short-time control of the air deflector leading to

[0098] Further, the above process can refer to Figure 11 , Figure 11 is the complete flowchart of the controller in the air conditioner provided by the embodiment of the application.

[0099] Compared with the prior art, the air conditioner disclosed by the application judges whether intermittent odor is generated by monitoring environmental humidity, indoor coil temperature, cooling operation time length and heating operation time length and the like, so that the air deflector is adjusted to avoid that the concentration of odor substances is too high in a local space, and the intermittent odor is weakened. The air conditioner of the application does not need to increase additional odor detection devices when the odor detection logic is implemented, and does not need to be matched with an odor removal device in the process of weakening the odor, and only by using the existing monitoring mode of the air conditioner, whether the odor is generated or not can be judged, and by controlling the air direction of the air deflector of the air conditioner, the intermittent odor can be weakened, and even the user cannot feel the effect of the odor, the production cost of the air conditioner is saved, and the user experience is optimized.

[0100] Referring to Figure 12 , Figure 12 is a flow chart of an air conditioner control method provided by an embodiment of the application, and the air conditioner control method comprises the following steps:

[0101] S1, acquiring environmental humidity, and acquiring indoor coil temperature when it is detected that the environmental humidity is lower than a preset humidity threshold value;

[0102] S2, when it is detected that the indoor coil temperature is reduced to a preset low temperature initial threshold value, accumulating each operation time length of the air conditioner when the indoor coil temperature is in several low temperature ranges in the cooling process of the air conditioner;

[0103] S3, when the air conditioner meets a preset heating condition, calculating a total operation time length according to each operation time length;

[0104] S4, when the total operation time length exceeds a preset operation time length initial threshold value, controlling an air deflector in the air conditioner to operate.

[0105] Specifically, when the air conditioner meets the preset heating condition, the total operation time length is calculated according to each operation time length, which comprises: when the indoor coil temperature is in a rising process, judging whether the indoor coil temperature reaches a high temperature threshold value; when the indoor coil temperature reaches the high temperature threshold value, accumulating a heating time length when the indoor coil temperature is from the low temperature initial threshold value to the high temperature threshold value; when the heating time length is less than a preset heating time length threshold value, determining that the air conditioner does not meet an odor generation condition; and when the heating time length is greater than or equal to the heating time length threshold value, calculating the total operation time length according to each operation time length.

[0106] Specifically, the total operation time length is calculated according to each operation time length, which comprises: acquiring a weight value corresponding to the low temperature range; calculating the product of the weight value corresponding to the low temperature range and the operation time length; and adding the products corresponding to the several low temperature ranges to obtain the total operation time length.

[0107] Specifically, the air conditioner is provided with a plurality of operation time length ranges, each of which has a corresponding wind direction control time length of the air deflector; the control of the air deflector in the air conditioner according to the preset wind direction swing logic includes: determining the corresponding operation time length range according to the total operation time length to obtain the target wind direction control time length of the air deflector; and controlling the air deflector to swing according to the preset wind direction swing logic within the time range according to the target wind direction control time length.

[0108] Specifically, the air deflector includes a transverse air deflector and a longitudinal air deflector, and the wind direction swing logic is that the transverse air deflector is lifted upward, and the longitudinal air deflector swings left and right according to a preset program.

[0109] It should be noted that the air conditioner and the control method thereof in the embodiments of the present application are implemented by the controller in the air conditioner described in the above embodiments, and will not be described here.

[0110] Compared with the prior art, the air conditioner control method disclosed in the present application judges whether the air conditioner has intermittent odor generation by monitoring environmental humidity, indoor coil temperature, cooling operation time length, heating operation time length and other factors, so as to adjust the air deflector air outlet direction, avoid the concentration of odor substances in the local space being too high, and weaken the odor. The air conditioner of the present application does not need to increase additional odor detection devices when implementing the odor detection logic, and does not need to match an odor removal device in the process of weakening the odor, and only through the existing monitoring mode of the air conditioner, it can be judged whether the odor is generated, and by controlling the wind direction of the air deflector of the air conditioner, the intermittent odor can be weakened, and even the user cannot feel the effect of the odor, thereby saving the production cost of the air conditioner and optimizing the user experience.

[0111] The above is the preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements are also considered to be within the protection scope of the present application.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises: an indoor unit for heat exchange with indoor air, wherein an indoor heat exchanger is arranged in the indoor unit; an outdoor unit for heat exchange with outdoor air, wherein an outdoor heat exchanger, a compressor, a four-way valve and an expansion valve are arranged in the outdoor unit, and the outdoor heat exchanger, the compressor, the four-way valve, the expansion valve and the indoor heat exchanger are connected by pipelines to form a refrigerant circulation loop; an indoor coil temperature sensor arranged in the indoor unit and used for detecting an indoor coil temperature of the indoor heat exchanger; a deflector arranged at an air outlet of the indoor unit and used for controlling a wind direction of the air outlet; a controller configured to: obtain an indoor environment humidity, and obtain the indoor coil temperature sent by the indoor coil temperature sensor when it is detected that the indoor environment humidity is lower than a preset humidity threshold value; accumulate a running time length of the air conditioner in each low-temperature range when the indoor coil temperature is in the low-temperature range during a process of the indoor coil temperature falling to a preset low-temperature initial threshold value when it is detected that the indoor coil temperature falls to the preset low-temperature initial threshold value; calculate a total running time length according to the running time length when the air conditioner meets a preset temperature rising condition; and control the deflector to run when the total running time length exceeds a preset running time length initial threshold value.

2. The air conditioner of claim 1, wherein The calculating the total running time length according to the running time length when the air conditioner meets the preset temperature rising condition comprises: judging whether the indoor coil temperature reaches a high-temperature threshold value when the indoor coil temperature is in a rising process; accumulating a temperature rising time length when the indoor coil temperature rises from the low-temperature initial threshold value to the high-temperature threshold value when the indoor coil temperature reaches the high-temperature threshold value; determining that the air conditioner does not meet an odor generation condition when the temperature rising time length is less than a preset temperature rising time length threshold value, and calculating the total running time length according to the running time length when the temperature rising time length is greater than or equal to the temperature rising time length threshold value.

3. The air conditioner of claim 1, wherein The calculating the total running time length according to the running time length comprises: obtaining a weight value corresponding to the low-temperature range; calculating a product of the weight value corresponding to the low-temperature range and the running time length; and adding the products corresponding to the low-temperature ranges to obtain the total running time length.

4. The air conditioner of claim 1, wherein The air conditioner is preset with a plurality of running time length ranges, and each running time length range has a corresponding wind direction control time length of the deflector; and after the total running time length exceeds the preset running time length initial threshold value, the controller is further configured to: determine a running time length range corresponding to the total running time length to obtain a target wind direction control time length of the deflector; and control the deflector to swing according to a preset wind direction swing logic within the target wind direction control time length.

5. The air conditioner of claim 1, wherein The air conditioner further comprises: an indoor environment humidity sensor arranged in the indoor unit and used for detecting an indoor environment humidity of an indoor environment.

6. The air conditioner of claim 4, wherein The deflector comprises a horizontal deflector and a vertical deflector, and the wind direction swing logic is that the horizontal deflector is lifted upward and the vertical deflector swings left and right according to a preset program.

7. An air conditioner control method characterized by comprising: The air conditioner comprises: obtaining an indoor environment humidity, and obtaining an indoor coil temperature when it is detected that the indoor environment humidity is lower than a preset humidity threshold value. accumulating each running duration of the air conditioner when the indoor coil temperature is in several low-temperature ranges in a process of decreasing of the indoor coil temperature when the indoor coil temperature is detected to decrease to a preset low-temperature initial threshold value; calculating a total running duration according to each running duration when the air conditioner meets a preset temperature rising condition; controlling a deflector in the air conditioner to operate when the total running duration exceeds a preset running duration initial threshold value.

8. The air conditioner control method according to claim 7, wherein The calculating the total running duration according to each running duration when the air conditioner meets the preset temperature rising condition comprises: judging whether the indoor coil temperature reaches a high-temperature threshold value when the indoor coil temperature is in a rising process; accumulating a temperature rising duration when the indoor coil temperature rises from the low-temperature initial threshold value to the high-temperature threshold value when the indoor coil temperature reaches the high-temperature threshold value; determining that the air conditioner does not meet an odor generation condition when the temperature rising duration is less than a preset temperature rising duration threshold value, and calculating the total running duration according to each running duration when the temperature rising duration is greater than or equal to the temperature rising duration threshold value.

9. The air conditioner control method according to claim 8, wherein The calculating the total running duration according to each running duration comprises: obtaining a weight value corresponding to the low-temperature range; calculating a product of the weight value corresponding to the low-temperature range and the running duration; adding the products corresponding to the several low-temperature ranges to obtain the total running duration.

10. The air conditioner control method of claim 8, wherein, The air conditioner is preset with several running duration ranges, and each running duration range has a corresponding deflector wind direction control duration; and the controlling the deflector in the air conditioner to operate according to the preset wind direction swing logic comprises: determining a running duration range corresponding to the total running duration to obtain a target wind direction control duration of the deflector; controlling the deflector to swing according to the preset wind direction swing logic within the target wind direction control duration.

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