Air conditioner

Abstract

The air conditioner comprises a refrigerant circulation loop, an indoor fan, an indoor environment temperature sensor, a coil pipe temperature sensor and a controller, and the controller is configured to determine a first expected surface temperature corresponding to the air conditioner based on the indoor environment temperature and preset humidity when a first preset condition is met, the first preset condition comprises that in the refrigeration mode or the dehumidification mode, the indoor environment temperature does not exceed the sum value of the set temperature and the first preset temperature difference value; and the operation state of the indoor fan is controlled based on the first difference value between the indoor coil pipe temperature and the first expected surface temperature or the frequency of the compressor, so that the stability of the indoor temperature is guaranteed under the condition that condensate water on the surface of the indoor heat exchanger is kept non-volatile. The problem that the user comfort and peculiar smell control are contradictory in the air supply stage of a traditional air conditioner is solved, and the user comfort is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and more particularly to an air conditioner. Background Art

[0002] During the refrigeration operation of the air conditioner, condensed water will appear on the surface of the indoor heat exchanger of the indoor unit. The condensed water has a certain adsorption effect on odor gases, and can temporarily reduce the odor problem in the room. However, when the indoor temperature reaches the set temperature, the outdoor unit of the air conditioner will stop working, and the indoor unit will switch to the "air supply" mode. In this mode, the condensed water on the indoor heat exchanger will gradually evaporate, and the previously adsorbed odor gases will also be released and discharged into the indoor environment, resulting in a decrease in air quality and user comfort.

[0003] In the prior art, the air conditioner is usually kept running in the refrigeration operation to maintain the condensed water on the indoor heat exchanger from evaporating. However, this method will make the indoor temperature lower than the expected set temperature, resulting in the indoor temperature not accurately matching the user's set value, and the user being in a low-temperature environment, thus leading to a decrease in user comfort and experience. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, an object of the present invention is to provide an air conditioner that can ensure the stability of the indoor temperature under the condition of maintaining the condensed water on the surface of the indoor heat exchanger from volatilizing, solve the problem of the contradiction between user comfort and odor control in the air supply stage of traditional air conditioners, and improve user comfort.

[0006] To this end, a second object of the present invention is to provide a control method for an air conditioner.

[0007] To achieve the above object, an embodiment of the first aspect of the present invention provides an air conditioner, including a refrigerant circulation circuit that enables the refrigerant to perform a refrigeration cycle in a circuit composed of a compressor, a condenser, a throttling component, an evaporator, and a four-way valve. One of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger; An indoor fan for driving indoor air to pass through the indoor heat exchanger by rotation, so that the refrigerant exchanges heat with the indoor air; An indoor ambient temperature sensor for detecting the indoor ambient temperature; A coil temperature sensor disposed on the indoor heat exchanger for detecting the indoor coil temperature; A controller, and the controller is configured to: When the first preset condition is satisfied, determine the first expected surface temperature corresponding to the air conditioner based on the indoor ambient temperature and the preset humidity, where the first preset condition includes: in the cooling mode or the dehumidifying mode, the indoor ambient temperature does not exceed the sum of the set temperature and the first preset temperature difference. Control the operating state of the indoor fan based on the first difference between the indoor coil temperature and the first expected surface temperature or the frequency of the compressor.

[0008] According to the air conditioner of the embodiment of the present invention, when the air conditioner is in the cooling or dehumidifying mode, the corresponding expected surface temperature can be determined according to the indoor ambient temperature and the preset humidity, so that the operating state of the indoor fan can be dynamically adjusted according to the frequency of the compressor of the indoor fan and the difference between the expected surface temperature and the indoor coil temperature, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensate water on the surface of the indoor heat exchanger from volatilizing, solve the problem of the contradiction between user comfort and odor control caused by the traditional air conditioner in the air supply stage, and improve the user comfort.

[0009] In some embodiments, when controlling the operating state of the indoor fan based on the first difference between the indoor coil temperature and the first expected surface temperature or the frequency of the compressor, the controller is configured to: obtain the current wind speed gear of the indoor fan; determine the corresponding first preset difference range based on the current wind speed gear, where different wind speed gears are pre-calibrated with their corresponding first preset difference ranges; when the frequency of the compressor does not exceed the preset frequency threshold or the first difference is within the first preset difference range, control the indoor fan to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to the first target wind speed gear.

[0010] The above technical solution has the following beneficial effects: By controlling the wind speed gear of the indoor fan according to the frequency of the compressor, the rapid rise of the indoor coil temperature and the resulting condensate water volatilization can be avoided, and by controlling the wind speed gear of the indoor fan with the first difference, the condensate water volatilization caused by the large deviation between the indoor coil temperature and the expected temperature can be avoided.

[0011] In some embodiments, the first target wind speed gear includes: the wind speed gear corresponding to the first preset condition that first appears during the process of reducing the gear, or the first wind speed gear preset in advance, where the first preset condition includes: the frequency of the compressor exceeds the preset frequency threshold and the first difference is not within the first preset difference range.

[0012] The above technical solution has the following beneficial effects: By accurately determining the first target wind speed gear, the operation state of the indoor fan can be accurately controlled to solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage.

[0013] In some embodiments, the air conditioner further includes a wind guiding component. During the process of controlling the indoor fan to gradually decrease from the current wind speed gear at a preset time interval, the controller is further configured to: If the first target gear is the first wind speed gear, control the indoor fan to operate at the first wind speed gear for a first preset time. If the frequency of the compressor does not exceed the preset frequency threshold or the first difference is within the first preset difference range, control the wind guiding component to move to a preset position, and the preset position is the position where the wind guiding component needs to move when the air conditioner turns on the anti-cold wind function.

[0014] The above technical solution has the following beneficial effects: By controlling the wind guiding component to move to the position where the wind guiding component needs to move when the air conditioner turns on the anti-cold wind function, it is possible to avoid blowing the volatilized odor towards the user and affecting the user's comfort.

[0015] In some embodiments, during the process of controlling the indoor fan to gradually decrease from the current wind speed gear at a preset time interval, the controller is further configured to: When the indoor environmental temperature exceeds the sum value of the set temperature and the first preset temperature difference and the duration reaches a second preset time, control the indoor fan to gradually increase the gear, and control the indoor fan to operate at each gear for the first preset time until it reaches the first preset gear, and then control the wind guiding component to move to a target position, where the target position includes: the position set by the user for the wind guiding component, or the initial position of the wind guiding component before moving to the preset position.

[0016] The above technical solution has the following beneficial effects: By controlling the indoor fan to gradually increase the gear and controlling the indoor fan to operate at each gear for the first preset time, it is possible to avoid causing instantaneous temperature fluctuations and resulting in the re-volatilization of condensed water, which has a negative impact on the user. At the same time, controlling the wind guiding component to move to the target position can further improve the user's comfort.

[0017] In some embodiments, during the process of controlling the indoor fan to gradually increase the gear, the controller is further configured to: When the indoor environmental temperature exceeds the sum value of the set temperature and the second preset temperature difference and the duration reaches a second preset time, control the indoor fan to directly increase to the first preset gear and control the wind guiding component to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

[0018] The above technical solution has the following beneficial effects: directly adjust the indoor fan to the first preset gear, and control the air deflector assembly to move to the target position, so as to quickly enhance the heat exchange efficiency by maximizing the fan speed and improve the user's comfort to the greatest extent.

[0019] In some embodiments, when determining the first desired surface temperature corresponding to the air conditioner based on the indoor environmental temperature and the preset humidity, the controller is configured to: based on the indoor environmental temperature and the preset humidity, obtain the first desired surface temperature corresponding to the air conditioner according to the indoor environmental temperature - preset humidity - first desired surface temperature mapping relationship pre-stored in the controller, wherein the indoor environmental temperature - preset humidity - first desired surface temperature mapping relationship includes multiple different corresponding relationships between the indoor environmental temperature, the preset humidity, and the first desired surface temperature.

[0020] The above technical solution has the following beneficial effects: through the indoor environmental temperature - preset humidity - first desired surface temperature mapping relationship pre-stored in the controller, the first desired surface temperature can be accurately obtained, and then the operating state of the indoor fan can be controlled according to the indoor coil temperature and the first desired surface temperature, so as to solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage.

[0021] In some embodiments, the air conditioner further includes: a humidity sensor for obtaining the indoor humidity; the controller is configured to: when the second preset condition is satisfied, determine the second desired surface temperature corresponding to the air conditioner based on the indoor environmental temperature and the indoor humidity, wherein the second preset condition includes: in the cooling mode or the dehumidifying mode, the indoor environmental temperature does not exceed the sum value of the set temperature and the first preset temperature difference, and the indoor humidity does not exceed the preset humidity threshold; control the operating state of the indoor fan based on the second difference between the indoor coil temperature and the second desired surface temperature or the frequency of the compressor.

[0022] The above technical solution has the following beneficial effects: by setting a humidity sensor, the corresponding desired surface temperature can be determined according to the indoor environmental temperature and humidity when the air conditioner is in the cooling or dehumidifying mode, so that the operating state of the indoor fan can be dynamically adjusted according to the frequency of the compressor of the indoor fan and the difference between the desired surface temperature and the indoor coil temperature, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensate water on the surface of the indoor heat exchanger from volatilizing, solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage, and improve the user's comfort.

[0023] In some embodiments, when controlling the operating state of the indoor fan based on the second difference between the indoor coil temperature and the second desired surface temperature or the frequency of the compressor, the controller is configured to: obtain the current wind speed gear of the indoor fan; determine the corresponding second preset difference range based on the current wind speed gear, where different wind speed gears are pre-calibrated with their corresponding second preset difference ranges; when the frequency of the compressor does not exceed a preset frequency threshold or the second difference is within the second preset difference range, control the indoor fan to gradually decrease from the current wind speed gear at preset time intervals until it decreases to the second target wind speed gear.

[0024] The above technical solution has the following beneficial effects: By controlling the wind speed gear of the indoor fan according to the frequency of the compressor, it is possible to avoid the rapid rise of the indoor coil temperature, which may cause the volatilization of condensate. And by controlling the wind speed gear of the indoor fan through the second difference, it is possible to avoid the volatilization of condensate caused by a large deviation between the indoor coil temperature and the desired temperature.

[0025] In some embodiments, the second target wind speed gear includes: the wind speed gear corresponding to the first occurrence of meeting the second preset condition during the process of decreasing the gear, or a preset second wind speed gear, where the second preset condition includes: the frequency of the compressor exceeds the preset frequency threshold and the second difference is not within the second preset difference range.

[0026] The above technical solution has the following beneficial effects: By accurately determining the second target wind speed gear, the operating state of the indoor fan can be accurately controlled to solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage.

[0027] In some embodiments, the air conditioner further includes a wind guiding component. During the process of controlling the indoor fan to gradually decrease from the current wind speed gear at preset time intervals, the controller is configured to: if the second target gear is the second wind speed gear, control the indoor fan to keep running at the second wind speed gear for a first preset time, and then if the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range, control the wind guiding component to move to a preset position, where the preset position is the position where the wind guiding component needs to move when the air conditioner turns on the anti-cold wind function.

[0028] The above technical solution has the following beneficial effects: By controlling the wind guiding component to move to the position where the wind guiding component needs to move when the air conditioner turns on the anti-cold wind function, it is possible to avoid blowing the volatilized odor towards the user and affecting the user's comfort.

[0029] In some embodiments, during the process of controlling the indoor fan to gradually decrease from the current wind speed gear at preset time intervals, the controller is configured to: when the duration that the indoor environmental temperature exceeds the sum value of the set temperature and the first preset temperature reaches the second preset time, or the duration that the indoor temperature exceeds the preset humidity threshold reaches the third preset time, control the indoor fan to gradually increase the gear, and control the indoor fan to maintain operation at each gear for the first preset time until reaching the second preset gear, and then control the air deflector assembly to move to the target position, where the target position includes: the position set by the user for the air deflector assembly, or the initial position of the air deflector assembly before moving to the preset position.

[0030] The above technical solution has the following beneficial effects: By controlling the indoor fan to gradually increase the gear and controlling the indoor fan to maintain operation at each gear for the first preset time, it is possible to avoid causing instantaneous temperature fluctuations that lead to the re-evaporation of condensed water, which has a negative impact on users. At the same time, controlling the air deflector assembly to move to the target position can further improve the comfort of users.

[0031] In some embodiments, during the process of controlling the indoor fan to gradually increase the gear, the controller is further configured to: when the indoor environmental temperature exceeds the sum value of the set temperature and the second preset difference and the duration reaches the second preset time, control the indoor fan to directly increase to the second preset gear and control the air deflector assembly to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

[0032] The above technical solution has the following beneficial effects: Controlling the indoor fan to directly increase to the second preset gear and controlling the air deflector assembly to move to the target position can quickly enhance the heat exchange efficiency by maximizing the fan speed, so as to maximize the comfort of users.

[0033] In some embodiments, when determining the second expected surface temperature corresponding to the air conditioner based on the indoor environmental temperature and the indoor humidity, the controller is configured to: obtain the second expected surface temperature corresponding to the air conditioner according to the indoor environmental temperature and the indoor humidity based on the indoor environmental temperature-humidity-second expected surface temperature mapping relationship pre-stored in the controller, where the indoor environmental temperature-humidity-second expected surface temperature mapping relationship includes multiple different corresponding relationships between the indoor environmental temperature, humidity, and the second expected surface temperature.

[0034] The above technical solution has the following beneficial effects: Through the indoor environment temperature-humidity-second desired surface temperature mapping relationship pre-stored in the controller, the second desired surface temperature can be accurately obtained, so as to control the operating state of the indoor fan according to the indoor coil temperature and the second desired surface temperature, so as to solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage.

[0035] To achieve the above object, an embodiment of the second aspect of the present invention provides a control method for an air conditioner, the method comprising the following steps: when a first preset condition is satisfied, determining a first desired surface temperature corresponding to the air conditioner based on the indoor environment temperature and a preset humidity, wherein the first preset condition includes: in the cooling mode or the dehumidification mode, the indoor environment temperature does not exceed the sum of the set temperature and the first preset temperature difference; controlling the operating state of the indoor fan based on a first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor.

[0036] According to the control method of the air conditioner in the embodiment of the present invention, when the air conditioner is in the cooling or dehumidification mode, the corresponding desired surface temperature can be determined according to the indoor environment temperature and the preset humidity, so that the operating state of the indoor fan can be dynamically adjusted according to the frequency of the compressor of the indoor fan and the difference between the desired surface temperature and the indoor coil temperature, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensed water on the surface of the indoor heat exchanger from volatilizing, solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage, and improve the user comfort.

[0037] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein: Figure 1 is a schematic diagram of a refrigeration cycle system of an air conditioner according to an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of a controller according to an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of an air conditioner according to another embodiment of the present invention; Figure 5 is a schematic diagram of the structure when the air guiding assembly moves to a preset position according to an embodiment of the present invention; Figure 6 Schematic structural diagram of the air guiding component moving to the target position according to an embodiment of the present invention; Figure 7 Schematic flow diagram of the control method of the air conditioner according to an embodiment of the present invention; Figure 8 Schematic flow diagram of controlling the operating state of the indoor fan based on the first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor according to an embodiment of the present invention; Figure 9 Schematic flow diagram of the control method of the air conditioner according to another embodiment of the present invention; Figure 10 Schematic flow diagram of controlling the operating state of the indoor fan based on the second difference between the indoor coil temperature and the second desired surface temperature or the frequency of the compressor according to an embodiment of the present invention. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0041] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] As Figure 1 shown, in the present invention, the air conditioner 1 performs a refrigeration cycle by using a compressor, a condenser, an evaporator, and a four-way valve. The refrigeration cycle includes a series of processes involving compression, condensation, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

[0044] The compressor compresses the refrigerant gas in a high-temperature and high-pressure state that enters from the suction pipe and discharges the compressed refrigerant gas through the discharge pipe. The discharged refrigerant gas flows into the condenser from the condenser inlet pipe. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0045] The evaporator evaporates the refrigerant that expands in the throttling device and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant to perform heat exchange with the material to be cooled. During the entire cycle, the air conditioner 1 can adjust the temperature of the indoor space.

[0046] Combined Figure 2 and Figure 4 shown, the air conditioner 1 in the present application includes an indoor fan 12 and an outdoor fan 13. The indoor fan 12 and the outdoor fan 13 can be set as an integrated machine or a split machine. The indoor fan 12 can be set as a wall-mounted type, a ceiling type, a duct type, etc., and the indoor fan 12 is installed on the top or ceiling of the indoor room.

[0047] Taking the indoor wall-mounted unit as an example, the indoor wall-mounted unit is usually installed at positions such as the indoor wall surface. Again, for example, the indoor cabinet (not shown in the figure) is also a form of the indoor fan 12 of the indoor fan 12.

[0048] Taking the split machine as an example, the air conditioner 1 includes an indoor fan 12 and an outdoor fan 13. Among them, the outdoor fan 13 is usually set outdoors and is used for heat exchange with the indoor environment.

[0049] In addition, the air conditioner 1 is equipped with a controller 71 to control the operation of each component inside the air conditioner 1, so that each component of the air conditioner 1 operates to achieve each predetermined function of the air conditioner 1. Among them, a control device 200 is also attached to the air conditioner 1. Exemplarily, the control device 200 is specifically set as a remote controller, and the remote controller has a function of communicating with the controller 71 using, for example, infrared rays or other communication methods. The remote controller is used for users to perform various controls on the air conditioner 1, realizing the interaction between the user and the air conditioner 1.

[0050] In the embodiment of the present application, the indoor fan 12 of the air conditioner 1 is arranged at the top or upper part of the room. Generally speaking, the installation height of the indoor fan 12 is higher than the user's activity area. The indoor fan 12 includes an air return port 17 and an air outlet 16 communicating with the room. Indoor air passes through the air return port 17 into the indoor fan 12 and flows back into the room through the air outlet 16.

[0051] At the position of the air outlet 16, a wind deflector 2 is provided. The wind deflector 2 adjusts the outflow direction of the air flowing through the air outlet 12 by changing its relative rotation angle with respect to the air outlet 16, thereby affecting the air temperature stratification in the room.

[0052] The embodiment of the present application also provides a schematic diagram of the hardware structure of the controller 71, as Figure 3 shown. The controller 71 includes a processor 83. Optionally, it further includes a memory 82 and a communication interface 84 connected to the processor 83. The processor 83, the memory 82, and the communication interface 84 are connected through a bus 81.

[0053] The processor 83 can be a central processing unit 83 (CPU), a general-purpose processor 83, a network processor 83 (NP), a digital signal processor 83 (DSP), a microprocessor 83, a microcontroller 83, a programmable logic device (PLD), or any combination thereof. The processor 83 can also be any other device with processing functions, such as a circuit, a device, or a software module. The processor 83 can also include multiple CPUs, and the processor 83 can be a single-core (single-CPU) processor 83 or a multi-core (multi-CPU) processor 83. Here, the processor 83 can refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).

[0054] The memory 82 can be a read-only memory (ROM), or other types of static storage devices that can store static information and instructions, a random access memory (RAM), or other types of dynamic storage devices that can store information and instructions. It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. The embodiments of the present application do not impose any restrictions on this. The memory 82 can exist independently or be integrated with the processor 83. Among them, the memory 82 can contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, so as to implement the control method of the air conditioner 1 provided by the embodiments of the present application.

[0055] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The communication interface 84 can be a module, a circuit, a transceiver, or any device capable of implementing communication.

[0056] The bus 81 can be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81, etc. The bus 81 can be divided into an address bus 81, a data bus 81, a control bus 81, etc.

[0057] The following will be combined with Figures 4 - 10 to describe the air conditioner 1 and its control method according to the embodiments of the present invention.

[0058] In some embodiments, as Figure 4 shown, the air conditioner 1 includes: a refrigerant circulation circuit 10. The refrigerant circulation circuit enables the refrigerant to perform a refrigeration cycle in a circuit composed of a compressor, a condenser, a throttling device, and an evaporator. One of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger.

[0059] In some embodiments, as Figure 4 shown, the air conditioner 1 may include: an indoor fan 12, configured to drive indoor air to pass through the indoor heat exchanger by rotation, so that the refrigerant exchanges heat with the indoor air.

[0060] In some embodiments, as Figure 4 shown, the air conditioner 1 may include: an indoor ambient temperature sensor 14, configured to detect the indoor ambient temperature.

[0061] In some embodiments, as Figure 4 shown, the air conditioner 1 may include: a coil temperature sensor 15, disposed on the indoor heat exchanger, configured to detect the indoor coil temperature.

[0062] In some embodiments, as Figure 4 shown, the air conditioner 1 may include: a controller 71, the controller 71 being configured to: when a first preset condition is satisfied, determine a first desired surface temperature corresponding to the air conditioner 1 based on the indoor ambient temperature and a preset humidity, wherein the first preset condition includes: in a cooling mode or a dehumidifying mode, the indoor ambient temperature does not exceed the sum value of the set temperature and a first preset temperature difference; control the operating state of the indoor fan 12 based on a first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor.

[0063] Specifically, during the operation of the air conditioner 1, when the air conditioner 1 is in a cooling mode or a dehumidifying mode, there will be a situation where condensed water appears on the surface of the indoor heat exchanger of the indoor unit. When the indoor unit switches to the "air supply" mode, the condensed water on the indoor heat exchanger will start to gradually evaporate, and the odor gas adsorbed by the condensed water will also be released accordingly, affecting the user experience. Based on this, the air conditioner can be continuously operated in the cooling operation to maintain the condensed water on the indoor heat exchanger from evaporating. At this time, to avoid the negative impact brought by the temperature reduction, when the indoor ambient temperature does not exceed the sum value of the set temperature and the first preset temperature difference, that is, when the first preset condition is satisfied, the air conditioner 1 can be controlled to enter the anti-odor mode. At this time, the first desired surface temperature corresponding to the air conditioner 1 can be determined based on the indoor ambient temperature and the preset humidity.

[0064] In a specific embodiment, the preset humidity, the set temperature, and the first preset temperature difference can be set according to the actual situation or experimental theory.

[0065] Further, since the surface of the indoor heat exchanger will continuously be covered with condensed water when the air conditioner 1 is in the refrigeration or dehumidification mode, adsorbing and fixing the possible odor gases, in order to prevent them from volatilizing into the air, the operating state of the indoor fan 12 can be controlled according to the difference between the indoor coil temperature and the desired surface temperature or the frequency of the compressor, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensed water on the surface of the indoor heat exchanger from volatilizing.

[0066] According to the air conditioner 1 of the embodiment of the present invention, when the air conditioner is in the refrigeration or dehumidification mode, the corresponding desired surface temperature can be determined according to the indoor environmental temperature and the preset humidity. Thus, the operating state of the indoor fan 12 can be dynamically adjusted according to the frequency of the compressor of the indoor fan 12 and the difference between the desired surface temperature and the indoor coil temperature, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensed water on the surface of the indoor heat exchanger from volatilizing, solve the problem of the contradiction between user comfort and odor control caused by the traditional air conditioner in the air supply stage, and improve the user comfort. In an embodiment of the present invention, when controlling the operating state of the indoor fan 12 based on the first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor, the controller 71 is configured to: obtain the current wind speed gear of the indoor fan 12; Determine the corresponding first preset difference range based on the current wind speed gear, where different wind speed gears are pre-calibrated with their corresponding first preset difference ranges; When the frequency of the compressor does not exceed the preset frequency threshold or the first difference is within the first preset difference range, control the indoor fan 12 to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to the first target wind speed gear.

[0067] Specifically, when controlling the operating state of the indoor fan 12, the current wind speed gear of the indoor fan 12 (such as ultra-high wind, high wind, medium wind, low wind, etc.) can be obtained, and the obtaining method includes but is not limited to reading the wind speed gear on the dashboard.

[0068] Further, since different wind speed gears correspond to different preset difference ranges regarding the difference between the indoor coil temperature and the first desired surface temperature, that is, each wind speed gear has a pre-calibrated first preset difference range. Therefore, after obtaining the current wind speed gear of the indoor fan 12, the corresponding first preset difference range can be determined based on the current wind speed gear. For example, as shown in Table 1, the first preset difference range corresponding to the ultra-high wind gear is 0 - 4, and the first preset difference range corresponding to the high wind is 0 - 3, and so on until the first preset difference range corresponding to the medium wind.

[0069]

[0070] Table 1 Further, when the frequency of the compressor does not exceed a preset frequency threshold, it indicates that the current refrigeration demand has decreased. If the wind speed gear of the indoor fan 12 is too high, it will cause the temperature of the indoor coil to rise too quickly, resulting in the evaporation of condensate. At this time, the indoor fan 12 can be controlled to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to the first target wind speed gear. When the first difference is within the first preset difference range, it indicates that the deviation between the corresponding indoor coil temperature and the first desired surface temperature is small at the current wind speed gear. To avoid increasing the deviation between the indoor coil temperature and the first desired surface temperature, the indoor fan 12 can also be controlled to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to the first target wind speed gear.

[0071] In an embodiment of the present invention, the first target wind speed gear includes: the wind speed gear corresponding to the first preset condition that first appears during the process of reducing the gear, or a preset first wind speed gear, where the first preset condition includes: the frequency of the compressor exceeds the preset frequency threshold and the first difference is not within the first preset difference range.

[0072] Specifically, the first target wind speed gear can be the wind speed gear corresponding to the first appearance of the frequency of the compressor exceeding the preset frequency threshold and the first difference not being within the first preset difference range during the process of reducing the gear, or it can be the preset first wind speed gear.

[0073] For example, assume that the current wind speed gear of the indoor fan 12 is the ultra-high wind gear, and the first difference is between 0 and 4. Then, the wind speed gear of the indoor fan 12 can be controlled to become the high wind gear and operate for the first preset time. At this time, it is judged whether the frequency of the compressor and the first difference meet the first preset condition. If so, it can be determined that the current wind speed gear is the first target wind speed gear. At this time, the indoor fan 12 can be controlled to maintain the current wind speed gear operation. If not, the indoor fan 12 can be controlled to reduce the gear to the high wind gear and operate for the first preset time, and then re-judge whether it meets the first preset condition, that is, whether the first difference at this time is not within the first preset difference range corresponding to the high wind gear, that is, between 0 and 3, and whether the frequency of the compressor exceeds the preset frequency threshold. If so, continue to downshift until the first target wind speed gear appears or downshift to the first wind speed gear preset by the user.

[0074] In a specific embodiment, the first wind speed gear is the low wind gear.

[0075] In an embodiment of the present invention, the air conditioner 1 further includes an air guiding component. Combine Figure 5As shown, during the process in which the indoor fan 12 decreases step by step from the current wind speed gear according to a preset time interval, the controller 71 is further configured to: if the first target gear is the first wind speed gear, control the indoor fan 12 to operate at the first wind speed gear for a first preset time. Then, if the frequency of the compressor does not exceed a preset frequency threshold or the first difference is within a first preset difference range, control the air deflector assembly to move to a preset position, where the preset position is the position to which the air deflector assembly needs to move when the air conditioner 1 turns on the cold air prevention function.

[0076] Specifically, in the air conditioner 1, there is also provided an air deflector assembly, including but not limited to an air deflector. During the process in which the indoor fan 12 decreases step by step from the current wind speed gear according to a preset time interval, if the first target gear is the first wind speed gear, that is, the gear preset by the user, the indoor fan 12 can be controlled to operate at the first wind speed gear for a first preset time. Then, it is determined again whether the frequency of the compressor does not exceed the preset frequency threshold or the first difference is within the first preset difference range. If so, it means that the operating load of the compressor is low, and the indoor fan 12 operates at the current speed, and there are still problems such as too fast a rise in the indoor coil temperature and volatilization of condensate. At the same time, there are problems such as an increase in the deviation between the indoor coil temperature and the first desired surface temperature and volatilization of condensate. At this time, the air deflector assembly can be controlled to move to the position where the air deflector assembly needs to move when the air conditioner 1 turns on the cold air prevention function, so as to prevent the volatilized odor from being blown towards the user and affecting the comfort of the user.

[0077] In one embodiment of the present invention, in combination with Figure 6 As shown, during the process in which the indoor fan 12 decreases step by step from the current wind speed gear according to a preset time interval, the controller 71 is further configured to: when the indoor ambient temperature exceeds the sum of the set temperature and the first preset temperature difference and the duration reaches a second preset time, control the indoor fan 12 to increase the gear step by step, and control the indoor fan 12 to operate at each gear for a first preset time until it reaches the first preset gear, and then control the air deflector assembly to move to a target position, where the target position includes: the position set by the user for the air deflector assembly, or the initial position of the air deflector assembly before moving to the preset position.

[0078] Specifically, during the process in which the indoor fan 12 decreases step by step from the current wind speed gear according to a preset time interval, the change of the indoor ambient temperature can also be monitored in real time. When the indoor ambient temperature exceeds the sum of the set temperature and the first preset temperature difference and the duration reaches a second preset time, it means that at the current indoor ambient temperature, the possibility of volatilization of condensate on the surface of the indoor heat exchanger is small. At this time, it is possible to prepare to exit the anti-odor mode. Specifically, the indoor fan 12 can be controlled to increase the gear step by step, and the indoor fan 12 is controlled to operate at each gear for a first preset time to avoid causing instantaneous temperature fluctuations that lead to the volatilization of condensate again and bringing negative impacts to the user.

[0079] Further, in the process of gradually increasing the gear, after reaching the first preset gear, the air guiding component can be controlled to move to the position set by the user for the air guiding component, or the initial position of the air guiding component before moving to the preset position. It can be understood that, assuming that the user has previously set the air guiding component to face a specific direction, the controller 71 will move the air guiding plate to this position. If there is no user setting, it will return to the initial position of the air guiding component before moving to the cold air prevention position.

[0080] In an embodiment of the present invention, in the process of controlling the indoor fan 12 to gradually increase the gear, the controller 71 is further configured to: when the indoor environmental temperature exceeds the sum value of the set temperature and the second preset temperature difference and the duration reaches the second preset time, control the indoor fan 12 to directly increase to the first preset gear and control the air guiding component to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

[0081] Specifically, in the process of controlling the indoor fan 12 to gradually increase the gear, if the indoor environmental temperature exceeds the sum value of the set temperature and the second preset temperature difference and the duration reaches the second preset time, it indicates that there is no situation of condensate volatilization at this time and the peculiar smell will not be blown out. At this time, the indoor fan 12 can be controlled to directly increase to the first preset gear and the air guiding component can be controlled to move to the target position, so as to quickly enhance the heat exchange efficiency by maximizing the fan speed and improve the user's comfort to the greatest extent. It can be understood that the second preset temperature difference is greater than the first preset temperature difference, that is, when the indoor environmental temperature exceeds the sum value of the set temperature and the second preset temperature difference, it can be clearly indicated that the anti-odor operation can be not performed at this time.

[0082] In an embodiment of the present invention, when determining the first expected surface temperature corresponding to the air conditioner 1 based on the indoor environmental temperature and the preset humidity, the controller 71 is configured to: based on the indoor environmental temperature and the preset humidity, obtain the first expected surface temperature corresponding to the air conditioner 1 according to the indoor environmental temperature - preset humidity - first expected surface temperature mapping relationship pre-stored in the controller 71, where the indoor environmental temperature - preset humidity - first expected surface temperature mapping relationship includes multiple different corresponding relationships between the indoor environmental temperature, the preset humidity, and the first expected surface temperature.

[0083] Specifically, in the process of determining the first desired surface temperature corresponding to the air conditioner 1 based on the indoor ambient temperature and the preset humidity, when the controller 71 obtains the indoor ambient temperature and the preset humidity, it starts to obtain the first desired surface temperature corresponding to the indoor ambient temperature and the preset humidity through a preset algorithm based on the pre-stored mapping relationship of indoor ambient temperature - preset humidity - first desired surface temperature. It can be understood that the pre-stored mapping relationship of indoor ambient temperature - preset humidity - first desired surface temperature includes multiple sets of corresponding relationships of indoor ambient temperature - preset humidity - first desired surface temperature, that is, each indoor ambient temperature and preset humidity has a corresponding first desired surface temperature.

[0084] In a specific embodiment, the mapping relationship of indoor ambient temperature - preset humidity - first desired surface temperature is shown in Table 2.

[0085] Table 2 Among them, if the indoor ambient temperature is greater than T_air1, then T_air1 shall prevail; if the indoor ambient temperature is less than T_air3, then T_air3 shall prevail, and the value of the indoor ambient temperature is rounded down, for example, 25.5°C is taken as 25°C, and the value range of T_air1 to T_air3 is 25°C to 27°C.

[0086] In an embodiment of the present invention, the air conditioner 1 further includes: a humidity sensor for obtaining the indoor humidity; the controller 71 is configured to: when the second preset condition is satisfied, determine the second desired surface temperature corresponding to the air conditioner 1 based on the indoor ambient temperature and the indoor humidity, wherein the second preset condition includes: in the cooling mode or the dehumidification mode, the indoor ambient temperature does not exceed the sum value of the set temperature and the first preset temperature difference, and the indoor humidity does not exceed the preset humidity threshold; Control the operating state of the indoor fan 12 based on the second difference between the indoor coil temperature and the second desired surface temperature or the frequency of the compressor.

[0087] Specifically, the air conditioner 1 can also be provided with a humidity sensor for obtaining the indoor humidity. During the operation of the air conditioner 1, if the air conditioner 1 is in the cooling mode or the dehumidifying mode, and the indoor ambient temperature does not exceed the sum of the set temperature and the first preset temperature difference, and the indoor humidity does not exceed the preset humidity threshold, that is, when the second preset condition is met, the air conditioner 1 can be controlled to enter the anti-odor mode. At this time, the second desired surface temperature corresponding to the air conditioner 1 can be determined based on the indoor ambient temperature and the indoor humidity. It can be understood that, in the case of setting a humidity sensor, the opening time of the anti-odor mode can be determined more accurately, so as to more accurately dynamically adjust the operating state of the indoor fan 12, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensate water on the surface of the indoor heat exchanger from volatilizing, and solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage, and improve user comfort.

[0088] Furthermore, since the surface of the indoor heat exchanger will continuously cover condensate water during the cooling or dehumidifying of the air conditioner 1, adsorb and fix the possible odor gases, and in order to prevent them from volatilizing into the air, the operating state of the indoor fan 12 can be controlled according to the difference between the indoor coil temperature and the desired surface temperature or the frequency of the compressor, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensate water on the surface of the indoor heat exchanger from volatilizing.

[0089] In an embodiment of the present invention, when controlling the operating state of the indoor fan 12 based on the second difference between the indoor coil temperature and the second desired surface temperature or the frequency of the compressor, the controller 71 is configured to: obtain the current wind speed gear of the indoor fan 12; Determine the corresponding second preset difference range based on the current wind speed gear, where different wind speed gears are pre-calibrated with their corresponding second preset difference ranges; When the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range, control the indoor fan 12 to gradually decrease from the current wind speed gear at a preset time interval until it decreases to the second target wind speed gear.

[0090] Specifically, when controlling the operating state of the indoor fan 12, the current wind speed gear of the indoor fan 12 (such as ultra-high wind, high wind, medium wind, low wind, etc.) can be obtained, and the obtaining method includes but is not limited to reading the wind speed gear on the dashboard.

[0091] Further, due to the addition of the humidity sensor, and different wind speed gears corresponding to different preset difference value ranges of the difference between the indoor coil temperature and the second desired surface temperature, that is, each wind speed gear has a pre-calibrated second preset difference value range. Therefore, after obtaining the current wind speed gear of the indoor fan 12, the corresponding second preset difference value range can be determined based on the current wind speed gear. For example, as shown in Table 3, the second preset difference value range corresponding to the ultra-high wind speed gear is 0-4, and the second preset difference value range corresponding to the high wind is 0-3, and so on until the second preset difference value ranges corresponding to the medium-low and low winds.

[0092]

[0093] Table 3 Further, when the frequency of the compressor does not exceed the preset frequency threshold, it indicates that the current refrigeration demand has decreased. An excessively high wind speed gear of the indoor fan 12 will cause the indoor coil temperature to rise too quickly, resulting in the evaporation of condensate. At this time, the indoor fan 12 can be controlled to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to the third target wind speed gear; and when the second difference value is within the second preset difference value range, it indicates that the deviation between the corresponding indoor coil temperature and the second desired surface temperature is small at the current wind speed gear. To avoid increasing the deviation between the indoor coil temperature and the second desired surface temperature, the indoor fan 12 can also be controlled to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to the second target wind speed gear.

[0094] In an embodiment of the present invention, the second target wind speed gear includes: the wind speed gear corresponding to the first occurrence of meeting the second preset condition during the process of reducing the gear, or the preset second wind speed gear, where the second preset condition includes: the frequency of the compressor exceeds the preset frequency threshold and the second difference value is not within the second preset difference value range.

[0095] Specifically, the second target wind speed gear can be the wind speed gear corresponding to the first occurrence of the frequency of the compressor exceeding the preset frequency threshold and the second difference value not being within the second preset difference value range during the process of reducing the gear, or it can also be the preset second wind speed gear.

[0096] For example, assume that the current wind speed gear of the indoor fan 12 is the ultra-high wind speed gear, and the second difference is between 0 and 4. Then, the wind speed gear of the indoor fan 12 can be controlled to become the high wind speed gear and run for the first preset time. At this time, it is judged whether the frequency of the compressor and the second difference meet the second preset condition. If so, the current wind speed gear can be determined as the second target wind speed gear. At this time, the indoor fan 12 can be controlled to maintain the current wind speed gear. If not, the indoor fan 12 can be controlled to lower the gear to the high wind speed gear and run for the first preset time, and then it is judged again whether the second preset condition is met, that is, whether the second difference at this time is not within the second preset difference range corresponding to the high wind speed gear, that is, between 0 and 3, and whether the frequency of the compressor exceeds the preset frequency threshold. If so, continue to downshift until the second target wind speed gear appears or downshift to the second wind speed gear preset by the user.

[0097] In a specific embodiment, the second wind speed gear is the wind speed gear corresponding to (low wind + very low wind speed) / 2. It can be understood that since a humidity sensor is provided, the real-time indoor humidity can be accurately obtained. Therefore, the second wind speed gear can be controlled to be lower medium-low and low wind speed gears to achieve precise control of the indoor fan 12.

[0098] In an embodiment of the present invention, the air conditioner 1 further includes a wind guiding component. Combining Figure 5 As shown, in the process of controlling the indoor fan 12 to gradually decrease from the current wind speed gear at a preset time interval, the controller 71 is configured to: if the second target gear is the second wind speed gear, then control the indoor fan 12 to maintain operation at the second wind speed gear for the first preset time. If the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range, then control the wind guiding component to move to the preset position, and the preset position is the position where the wind guiding component needs to move when the air conditioner 1 turns on the anti-cold wind function.

[0099] Specifically, a wind guiding component is also provided in the air conditioner 1, including but not limited to a wind guiding plate. In the process of controlling the indoor fan 12 to gradually decrease from the current wind speed gear at a preset time interval, if the second target gear is the second wind speed gear, that is, the gear preset by the user, then the indoor fan 12 can be controlled to maintain operation at the second wind speed gear for the first preset time, and then it is judged again whether the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range. If so, it means that the operation load of the compressor is low, and the indoor fan 12 runs at the current speed. There is still a problem that the temperature of the indoor coil rises too fast and the condensate volatilizes. At the same time, there is a problem that the deviation between the temperature of the indoor coil and the second expected surface temperature increases and the condensate volatilizes. At this time, the wind guiding component can be controlled to move to the position where the wind guiding component needs to move when the air conditioner 1 turns on the anti-cold wind function, so as to avoid blowing the volatilized odor to the user and affecting the comfort of the user.

[0100] In an embodiment of the present invention, in combination with Figure 6 As shown, during the process that the indoor fan 12 in the control room gradually decreases from the current wind speed gear according to a preset time interval, the controller 71 is configured to: when the duration that the indoor environmental temperature exceeds the sum value of the set temperature and the first preset temperature difference reaches the second preset time, or the duration that the indoor temperature exceeds the preset humidity threshold reaches the third preset time, control the indoor fan 12 to gradually increase the gear, and control the indoor fan 12 to maintain operation at each gear for the first preset time until reaching the second preset gear, and then control the air deflector assembly to move to the target position, where the target position includes: the position set by the user for the air deflector assembly, or the initial position of the air deflector assembly before moving to the preset position.

[0101] Specifically, during the process that the indoor fan 12 gradually decreases from the current wind speed gear according to a preset time interval, the changes in the indoor environmental temperature and the indoor humidity can also be monitored in real time. When the indoor environmental temperature exceeds the sum value of the set temperature and the first preset temperature difference and the duration reaches the second preset time, or the duration that the indoor temperature exceeds the preset humidity threshold reaches the third preset time, it indicates that under the current indoor environmental temperature or the current indoor humidity, the possibility of the condensation water on the surface of the indoor heat exchanger volatilizing is small. At this time, it is possible to prepare to exit the anti-odor mode. Specifically, the indoor fan 12 can be controlled to gradually increase the gear, and the indoor fan 12 is controlled to maintain operation at each gear for the first preset time to avoid causing instantaneous temperature fluctuations that cause the condensation water to volatilize again and bring negative impacts to the user.

[0102] Furthermore, during the process of gradually increasing the gear, after reaching the second preset gear, the air deflector assembly can be controlled to move to the position set by the user for the air deflector assembly, or the initial position of the air deflector assembly before moving to the preset position. It can be understood that assuming the user previously set the air deflector assembly to face a specific direction, the controller 71 will move the air deflector to this position. If there is no user setting, it will return to the initial position of the air deflector assembly before moving to the anti-cold air position.

[0103] In an embodiment of the present invention, during the process that the controller 71 gradually increases the gear of the indoor fan 12, the controller 71 is further configured to: when the indoor environmental temperature exceeds the sum value of the set temperature and the second preset difference and the duration reaches the second preset time, control the indoor fan 12 to directly increase to the second preset gear, and control the air deflector assembly to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

[0104] Specifically, during the process of gradually increasing the gear of the indoor fan 12 in the control room, if the indoor environmental temperature exceeds the sum of the set temperature and the second preset temperature difference, and the duration reaches the second preset time, it indicates that there is no volatilization of the condensate water at this time, and the peculiar smell will not be blown out. At this time, the indoor fan 12 can be directly controlled to be increased to the second preset gear, and the air guiding component is controlled to move to the target position, so as to quickly enhance the heat exchange efficiency by maximizing the fan speed, so as to improve the user's comfort to the greatest extent. It can be understood that the second preset temperature difference is greater than the first preset temperature difference, that is, when the indoor environmental temperature exceeds the sum of the set temperature and the second preset temperature difference, it can be clearly indicated that the anti-peculiar smell operation can not be carried out at this time.

[0105] In an embodiment of the present invention, when determining the second desired surface temperature corresponding to the air conditioner 1 based on the indoor environmental temperature and the indoor humidity, the controller 71 is configured to: based on the indoor environmental temperature and the indoor humidity, obtain the second desired surface temperature corresponding to the air conditioner 1 based on the indoor environmental temperature-humidity-second desired surface temperature mapping relationship pre-stored in the controller 71, wherein the indoor environmental temperature-humidity-second desired surface temperature mapping relationship includes multiple different corresponding relationships between the indoor environmental temperature-humidity-second desired surface temperature.

[0106] Specifically, during the process of determining the second desired surface temperature corresponding to the air conditioner 1 based on the indoor environmental temperature and the preset humidity, when the controller 71 obtains the indoor environmental temperature and the indoor humidity, it starts to obtain the second desired surface temperature corresponding to the indoor environmental temperature and the humidity based on the pre-stored indoor environmental temperature-humidity-second desired surface temperature mapping relationship through a preset algorithm. It can be understood that the pre-stored indoor environmental temperature-humidity-second desired surface temperature mapping relationship includes multiple corresponding relationships between the indoor environmental temperature-humidity-second desired surface temperature, that is, each indoor environmental temperature and humidity has a corresponding second desired surface temperature.

[0107] In a specific embodiment, the indoor environmental temperature-humidity-second desired surface temperature mapping relationship is shown in Table 4

[0108] Table 4 Among them, if the indoor environmental temperature is greater than T_air1, then T_air1 shall prevail; if the indoor environmental temperature is less than T_air3, then T_air3 shall prevail; if the humidity is greater than RH5, then RH5 shall prevail; if the humidity is less than RH1, then RH1 shall prevail, and the values of the indoor environmental temperature and humidity are rounded down, such as 25.5°C is taken as 25°C, and 35%RH is taken as 30%RH, and the value range of T_air1~T_air3 is 25°C~27°C. The value range of RH1~RH5 is 30%~70%.

[0109] According to the air conditioner 1 of the embodiment of the present invention, when the air conditioner is in the cooling or dehumidifying mode, the corresponding desired surface temperature can be determined according to the indoor environmental temperature and the preset humidity. Thus, the operating state of the indoor fan 12 can be dynamically adjusted according to the frequency of the compressor of the indoor fan 12 and the difference between the desired surface temperature and the indoor coil temperature, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensed water on the surface of the indoor heat exchanger from volatilizing, solve the problem of the contradiction between user comfort and odor control caused by the traditional air conditioner during the air supply stage, and improve the user comfort. Further, when the air conditioner 1 is provided with a humidity sensor, the corresponding desired surface temperature can be determined more accurately according to the indoor environmental temperature and the indoor real-time humidity, so that the operating state of the indoor fan 12 can be adjusted more accurately dynamically, further maintaining the condensed water on the surface of the indoor heat exchanger from volatilizing, ensuring the stability of the indoor temperature, and improving the user comfort. Further, after the indoor fan 12 is controlled to be reduced to the target wind speed gear, when the frequency of the compressor does not exceed the preset frequency threshold or the difference between the desired surface temperature and the indoor coil temperature is within the preset difference range, the operating position of the air guide assembly can be controlled to avoid blowing the volatilized odor towards the user, thereby further improving the user comfort.

[0110] As Figure 7 shown, the control method of the air conditioner of the embodiment of the present invention at least includes step S1-step S2.

[0111] Step S1, when the first preset condition is satisfied, determine the first desired surface temperature corresponding to the air conditioner based on the indoor environmental temperature and the preset humidity, wherein the first preset condition includes: in the cooling mode or the dehumidifying mode, the indoor environmental temperature does not exceed the sum value of the set temperature and the difference value of the first preset temperature.

[0112] Step S2, control the operating state of the indoor fan based on the first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor.

[0113] In some embodiments, as Figure 8 shown, controlling the operating state of the indoor fan based on the first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor specifically includes: obtaining the current wind speed gear of the indoor fan; determining the corresponding first preset difference range based on the current wind speed gear, wherein different wind speed gears are pre-calibrated with their corresponding first preset difference ranges; when the frequency of the compressor does not exceed the preset frequency threshold or the first difference is within the first preset difference range, control the indoor fan to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to the first target wind speed gear.

[0114] In some embodiments, the first target wind speed gear includes: the wind speed gear corresponding to the first one that appears during the process of reducing the gear and satisfying the first preset condition, or the preset first wind speed gear, where the first preset condition includes: the frequency of the compressor exceeds a preset frequency threshold and the first difference is not within the first preset difference range.

[0115] In some embodiments, the air conditioner further includes an air deflector assembly. During the process of controlling the indoor fan to gradually reduce from the current wind speed gear at a preset time interval, it further includes: if the first target gear is the first wind speed gear, then control the indoor fan to keep running at the first wind speed gear for a first preset time. If the frequency of the compressor does not exceed the preset frequency threshold or the first difference is within the first preset difference range, then control the air deflector assembly to move to a preset position, and the preset position is the position where the air deflector assembly needs to move when the air conditioner turns on the cold air prevention function.

[0116] In some embodiments, during the process of controlling the indoor fan to gradually reduce from the current wind speed gear at a preset time interval, it further includes: when the indoor ambient temperature exceeds the sum of the set temperature and the first preset temperature difference and the duration reaches a second preset time, control the indoor fan to gradually increase the gear, and control the indoor fan to keep running at each gear for a first preset time until reaching the first preset gear, and then control the air deflector assembly to move to a target position, where the target position includes: the position set by the user for the air deflector assembly, or the initial position of the air deflector assembly before moving to the preset position.

[0117] In some embodiments, during the process of controlling the indoor fan to gradually increase the gear, it further includes: when the indoor ambient temperature exceeds the sum of the set temperature and the second preset temperature difference and the duration reaches a second preset time, control the indoor fan to directly increase to the first preset gear and control the air deflector assembly to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

[0118] In some embodiments, determining the first expected surface temperature corresponding to the air conditioner based on the indoor ambient temperature and the preset humidity specifically includes: according to the indoor ambient temperature and the preset humidity, based on the indoor ambient temperature - preset humidity - first expected surface temperature mapping relationship pre-stored in the controller, obtaining the first expected surface temperature corresponding to the air conditioner, where the indoor ambient temperature - preset humidity - first expected surface temperature mapping relationship includes multiple different corresponding relationships between the indoor ambient temperature - preset humidity - first expected surface temperature.

[0119] In some embodiments, the air conditioner further includes: a humidity sensor for obtaining the indoor humidity, in combination with Figure 9As shown, the control method of the air conditioner further includes: when the second preset condition is satisfied, determining the second desired surface temperature corresponding to the air conditioner based on the indoor environmental temperature and the indoor humidity, where the second preset condition includes: in the cooling mode or the dehumidifying mode, the indoor environmental temperature does not exceed the sum of the set temperature and the first preset temperature, and the indoor humidity does not exceed the preset humidity threshold; controlling the operating state of the indoor fan based on the second difference between the indoor coil temperature and the second desired surface temperature or the frequency of the compressor.

[0120] In some embodiments, in combination with Figure 10 As shown, controlling the operating state of the indoor fan based on the second difference between the indoor coil temperature and the second desired surface temperature or the frequency of the compressor specifically includes: obtaining the current wind speed gear of the indoor fan; determining the corresponding second preset difference range based on the current wind speed gear, where different wind speed gears are pre-calibrated with their corresponding second preset difference ranges; when the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range, controlling the indoor fan to gradually decrease the gear from the current wind speed gear at a preset time interval until it decreases to the second target wind speed gear.

[0121] In some embodiments, the second target wind speed gear includes: the wind speed gear corresponding to the first occurrence of the satisfaction of the second preset condition during the process of decreasing the gear, or the preset second wind speed gear, where the second preset condition includes: the frequency of the compressor exceeds the preset frequency threshold and the second difference is not within the second preset difference range.

[0122] In some embodiments, the air conditioner further includes a wind deflector assembly. During the process of controlling the indoor fan to gradually decrease from the current wind speed gear at a preset time interval, it further includes: if the second target gear is the second wind speed gear, controlling the indoor fan to keep running at the second wind speed gear for the first preset time, and if the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range, controlling the wind deflector assembly to move to the preset position, and the preset position is the position where the wind deflector assembly needs to move when the air conditioner turns on the anti-cold wind function.

[0123] In some embodiments, during the process of controlling the indoor fan to gradually decrease from the current wind speed gear at a preset time interval, it further includes: when the duration for which the indoor environmental temperature exceeds the sum of the set temperature and the first preset temperature reaches the second preset time, or the duration for which the indoor temperature exceeds the preset humidity threshold reaches the third preset time, controlling the indoor fan to gradually increase the gear, and controlling the indoor fan to keep running at each gear for the first preset time until it reaches the second preset gear, and then controlling the wind deflector assembly to move to the target position, and the target position includes: the position set by the user for the wind deflector assembly, or the initial position of the wind deflector assembly before it moves to the preset position.

[0124] In some embodiments, during the process of gradually increasing the indoor fan to a higher gear, it further includes: when the indoor environmental temperature exceeds the sum of the set temperature and the second preset difference and lasts for the second preset time, controlling the indoor fan to directly increase to the second preset gear and controlling the air deflector assembly to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

[0125] In some embodiments, determining the corresponding second desired surface temperature of the air conditioner based on the indoor environmental temperature and the indoor humidity specifically includes: according to the indoor environmental temperature and the indoor humidity, based on the indoor environmental temperature-humidity-second desired surface temperature mapping relationship pre-stored in the controller, obtaining the corresponding second desired surface temperature of the air conditioner, where the indoor environmental temperature-humidity-second desired surface temperature mapping relationship includes multiple different corresponding relationships between the indoor environmental temperature, humidity, and second desired surface temperature.

[0126] It should be noted that when controlling this air conditioner, its specific implementation method is similar to that of the air conditioner in any of the above embodiments of the present invention. Therefore, for a detailed exemplary description of the control process of this air conditioner, reference can be made to the relevant description part of the air conditioner mentioned above. To reduce redundancy, it will not be repeated here.

[0127] According to the control method of the air conditioner of the embodiment of the present invention, the corresponding desired surface temperature can be determined according to the indoor environmental temperature and the preset humidity when the air conditioner is in the cooling or dehumidifying mode. Thus, the operating state of the indoor fan can be dynamically adjusted according to the frequency of the compressor of the indoor fan and the difference between the desired surface temperature and the indoor coil temperature, so as to ensure the stability of the indoor temperature under the condition of maintaining the condensate water on the surface of the indoor heat exchanger from volatilizing, solve the problem of the contradiction between user comfort and odor control caused by traditional air conditioners during the air supply stage, and improve user comfort.

[0128] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0129] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that, Comprising: A refrigerant circulation circuit that enables the refrigerant to perform a refrigeration cycle in a circuit composed of a compressor, a condenser, a throttling component, an evaporator, and a four-way valve. One of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger; An indoor fan for driving indoor air to pass through the indoor heat exchanger by rotation, so that the refrigerant exchanges heat with the indoor air; An indoor ambient temperature sensor for detecting the indoor ambient temperature; A coil temperature sensor disposed on the indoor heat exchanger for detecting the indoor coil temperature; A controller, the controller being configured to: When a first preset condition is met, determine a first desired surface temperature corresponding to the air conditioner based on the indoor ambient temperature and a preset humidity, where the first preset condition includes: in a refrigeration mode or a dehumidification mode, the indoor ambient temperature does not exceed the sum of the set temperature and a first preset temperature difference; Control the operating state of the indoor fan based on a first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor.

2. The air conditioner according to claim 1, wherein When controlling the operating state of the indoor fan based on a first difference between the indoor coil temperature and the first desired surface temperature or the frequency of the compressor, the controller is configured to: Obtain the current wind speed gear of the indoor fan; Determine a corresponding first preset difference range based on the current wind speed gear, where different wind speed gears are pre-calibrated with their corresponding first preset difference ranges; When the frequency of the compressor does not exceed a preset frequency threshold or the first difference is within the first preset difference range, control the indoor fan to gradually reduce the gear from the current wind speed gear at a preset time interval until it is reduced to a first target wind speed gear.

3. The air conditioner according to claim 2, wherein The first target wind speed gear includes: the wind speed gear corresponding to the first preset condition that first appears during the process of reducing the gear, or a preset first wind speed gear, where the first preset condition includes: the frequency of the compressor exceeds the preset frequency threshold and the first difference is not within the first preset difference range.

4. The air conditioner according to claim 3, characterized in that, The air conditioner further includes an air guiding component. During the process of controlling the indoor fan to gradually reduce the gear from the current wind speed gear at a preset time interval, the controller is further configured to: If the first target gear is the first wind speed gear, control the indoor fan to maintain operation at the first wind speed gear for a first preset time. If the frequency of the compressor does not exceed the preset frequency threshold or the first difference is within the first preset difference range, control the air guiding component to move to a preset position, and the preset position is the position where the air guiding component needs to move when the air conditioner turns on the anti-cold wind function.

5. The air conditioner according to claim 4, characterized in that, During the process of controlling the indoor fan to gradually reduce the gear from the current wind speed gear at a preset time interval, the controller is further configured to: When the indoor environment temperature exceeds the sum value of the set temperature and the first preset temperature difference, and the duration reaches the second preset time, control the indoor fan to gradually increase the gear, and control the indoor fan to maintain operation for the first preset time at each gear until reaching the first preset gear, and then control the air deflector assembly to move to the target position, where the target position includes: the position set by the user for the air deflector assembly, or the initial position of the air deflector assembly before moving to the preset position.

6. The air conditioner according to claim 5, characterized in that, During the process of controlling the indoor fan to gradually increase the gear, the controller is further configured to: When the indoor environment temperature exceeds the sum value of the set temperature and the second preset temperature difference, and the duration reaches the second preset time, control the indoor fan to directly increase to the first preset gear, and control the air deflector assembly to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

7. The air conditioner according to claim 1, wherein, When determining the first expected surface temperature corresponding to the air conditioner based on the indoor environment temperature and the preset humidity, the controller is configured to: According to the indoor environment temperature and the preset humidity, based on the indoor environment temperature - preset humidity - first expected surface temperature mapping relationship pre-stored in the controller, obtain the first expected surface temperature corresponding to the air conditioner, where the indoor environment temperature - preset humidity - first expected surface temperature mapping relationship includes multiple different corresponding relationships between the indoor environment temperature - preset humidity - first expected surface temperature.

8. The air conditioner according to claim 1, wherein The air conditioner further includes: a humidity sensor for obtaining the indoor humidity; the controller is configured to: When the second preset condition is satisfied, determine the second expected surface temperature corresponding to the air conditioner based on the indoor environment temperature and the indoor humidity, where the second preset condition includes: in the cooling mode or the dehumidifying mode, the indoor environment temperature does not exceed the sum value of the set temperature and the first preset temperature difference, and the indoor humidity does not exceed the preset humidity threshold; Control the operating state of the indoor fan based on the second difference between the indoor coil temperature and the second expected surface temperature or the frequency of the compressor.

9. The air conditioner according to claim 8, wherein When controlling the operating state of the indoor fan based on the second difference between the indoor coil temperature and the second expected surface temperature or the frequency of the compressor, the controller is configured to: Obtain the current wind speed gear of the indoor fan; Determine the corresponding second preset difference range based on the current wind speed gear, where different wind speed gears are pre-calibrated with their corresponding second preset difference ranges; When the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range, control the indoor fan to gradually decrease the gear from the current wind speed gear at a preset time interval until it decreases to the second target wind speed gear.

10. The air conditioner according to claim 9, wherein, The second target wind speed gear includes: the wind speed gear corresponding to the first occurrence that satisfies the second preset condition during the process of reducing the gear, or a preset second wind speed gear, where the second preset condition includes: the frequency of the compressor exceeds a preset frequency threshold and the second difference is not within the second preset difference range.

11. The air conditioner according to claim 10, characterized in that, During the process of controlling the indoor fan to gradually reduce the gear from the current wind speed gear at a preset time interval, the controller is configured to: If the second target gear is the second wind speed gear, then control the indoor fan to keep running at the second wind speed gear for a first preset time. If the frequency of the compressor does not exceed the preset frequency threshold or the second difference is within the second preset difference range, then control the air deflector assembly to move to a preset position, and the preset position is the position where the air deflector assembly needs to move when the air conditioner turns on the cold air prevention function.

12. The air conditioner according to claim 10, characterized in that, The air conditioner further includes an air deflector assembly. During the process of controlling the indoor fan to gradually reduce the gear from the current wind speed gear at a preset time interval, the controller is configured to: When the duration that the indoor environmental temperature exceeds the sum value of the set temperature and the first preset temperature difference reaches a second preset time, or the duration that the indoor temperature exceeds the preset humidity threshold reaches a third preset time, control the indoor fan to gradually increase the gear, and control the indoor fan to keep running at each gear for the first preset time. After reaching the second preset gear, control the air deflector assembly to move to a target position, and the target position includes: the position set by the user for the air deflector assembly, or the initial position of the air deflector assembly before moving to the preset position.

13. The air conditioner according to claim 12, characterized in that, During the process of controlling the indoor fan to gradually increase the gear, the controller is further configured to: When the indoor environmental temperature exceeds the sum value of the set temperature and the second preset difference and the duration reaches the second preset time, control the indoor fan to directly increase to the second preset gear, and control the air deflector assembly to move to the target position, where the second preset temperature difference is greater than the first preset temperature difference.

14. The air conditioner according to claim 13, characterized in that, When determining the second desired surface temperature corresponding to the air conditioner based on the indoor environmental temperature and the indoor humidity, the controller is configured to: According to the indoor environmental temperature and the indoor humidity, based on the indoor environmental temperature-humidity-second desired surface temperature mapping relationship pre-stored in the controller, obtain the second desired surface temperature corresponding to the air conditioner, where the indoor environmental temperature-humidity-second desired surface temperature mapping relationship includes multiple different corresponding relationships between the indoor environmental temperature-humidity-second desired surface temperature.

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