Air conditioner

Abstract

The application discloses an air conditioner for adjusting the temperature of a set space to a target temperature, comprising: an indoor unit having: a supply air duct, in which a supply air fan is arranged to form a supply air flow that can be sent into the set space; an indoor heat exchanger for heat exchanging the refrigerant flowing therein with the supply air flow to increase the supply air temperature; and an auxiliary heater for heating the supply air flow to increase the supply air temperature; a control unit, after the supply air fan forms the supply air flow, estimating the real-time temperature deviation of the ambient temperature of the set space compared with the target temperature; and when the real-time temperature deviation is not lower than a set temperature deviation, executing an auxiliary heating mode, first making the compensation heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation, and then adjusting the compensation heat generated by the auxiliary heater to keep the supply air temperature within a target supply air temperature interval. The air conditioner provided by the application has better user comfort when the auxiliary heater is turned on.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, and in particular to an air conditioner. BACKGROUND

[0002] In the existing air conditioner, an auxiliary heating component is arranged to improve the air conditioning effect of the heating function. The auxiliary heating component works at a fixed power, and the indoor fan runs at a speed under a given control mode to achieve the effect of improving the supply air temperature.

[0003] However, due to the large difference in the ambient temperature of the air-conditioned room, the heating effect of the auxiliary heating component is quite different when running at different ambient temperatures, which cannot well meet the user's use demand and achieve the matching user experience.

[0004] The above information disclosed in the background of the application is only used to increase the understanding of the background of the application, and therefore, it can include prior art known to those skilled in the art. SUMMARY

[0005] In order to solve the problem that the heating effect of the auxiliary heating component is quite different when running at different ambient temperatures due to the large difference in the ambient temperature of the air-conditioned room, which cannot well meet the user's use demand and achieve the matching user experience, in some embodiments of the present application, an air conditioner is provided.

[0006] The air conditioner is used to adjust the temperature of a set space to a target temperature. The air conditioner comprises an indoor unit, which further comprises a supply air duct, an indoor heat exchanger and an auxiliary heater; wherein a supply air fan is arranged in the supply air duct to form a supply air flow that can be sent into the set space; the indoor heat exchanger is used to heat exchange the flowing refrigerant therein with the supply air flow to increase the supply air temperature; and the auxiliary heat exchanger is used to heat the supply air flow to increase the supply air temperature.

[0007] In some embodiments of the present application, the air conditioner further comprises a control unit, which, after the supply air fan forms the supply air flow, estimates the real-time temperature deviation of the ambient temperature of the set space compared to the target temperature; and when the real-time temperature deviation is not lower than a set temperature deviation, executes an auxiliary heating mode, first makes the compensation heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation, and then adjusts the compensation heat generated by the auxiliary heater to keep the supply air temperature within the target supply air temperature range.

[0008] In some embodiments of the present application, the auxiliary heater comprises a plurality of independently arranged auxiliary heating components, each auxiliary heating component in the working state can generate compensation heat.

[0009] In some embodiments of the present application, the control unit is configured to execute the auxiliary heating mode, first making the number of auxiliary heating components in the working state negatively correlated with the real-time temperature deviation, and then adjusting the number of auxiliary heating components in the working state to keep the supply air temperature within the target supply air temperature range.

[0010] In some embodiments of the present application, the control unit is configured to execute the auxiliary heating mode, first making the number of auxiliary heating components in the working state negatively correlated with the real-time temperature deviation, and then switching at least one group of auxiliary heating components in the working state to the off state when the supply air temperature exceeds the upper threshold of the temperature range of the target supply air temperature range.

[0011] In some embodiments of the present application, the control unit is configured to execute the auxiliary heating mode, first making the number of auxiliary heating components in the working state negatively correlated with the real-time temperature deviation, and then periodically increasing the real-time rotating speed until the supply air temperature rises to exceed the lower threshold of the temperature range of the target supply air temperature range when the supply air temperature is lower than the lower threshold of the temperature range of the target supply air temperature range.

[0012] In some embodiments of the present application, the control unit is configured to execute the auxiliary heating mode, estimate the real-time rotating speed deviation between the upper threshold of the rotating speed and the real-time rotating speed, and switch at least one group of auxiliary heating components in the off state to the working state until the supply air temperature rises to exceed the lower threshold of the temperature range of the target supply air temperature range or all auxiliary heating components are in the working state when the condition that the real-time rotating speed deviation is the lower threshold of the rotating speed deviation but the supply air temperature does not exceed the lower threshold of the temperature range of the target supply air temperature range is met.

[0013] In some embodiments of the present application, the control unit, when executing the auxiliary heating mode, further performs the following control: when the compensation heat generated by the auxiliary heater reaches the set upper limit value of the compensation heat, the auxiliary heating mode is suspended, and the compensation heat generated by the auxiliary heater is reduced.

[0014] In some embodiments of the present application, the auxiliary heater comprises a plurality of independently arranged auxiliary heating components, each auxiliary heating component in the working state can generate compensation heat; when the compensation heat generated by any auxiliary heating component in the working state reaches the upper limit value of the compensation heat, the auxiliary heating mode is suspended, and the auxiliary heating component reaching the upper limit value of the compensation heat is turned off.

[0015] In some embodiments of the present application, the supply air duct has an adjustable shielding part, which is configured to prevent part of the supply air flow from entering the set space and guide the prevented part of the supply air flow to the auxiliary heater for reheating.

[0016] In some embodiments of the present application, the control unit executes the auxiliary heating mode, and adjusts the angle of the shielding unit when the supply air temperature deviates from the target supply air temperature range, so that the flow rate of the supply air flow is negatively correlated with the deviation of the supply air temperature from the target supply air temperature range, until the supply air temperature is kept within the target supply air temperature range, the shielding unit avoids the supply air duct and no longer prevents the supply air flow from entering the set space.

[0017] In some embodiments of the present application, if the controller suspends the auxiliary heating mode and closes the auxiliary heating assembly that reaches the upper limit of the compensation heat, the controller simultaneously adjusts the angle of the shielding unit and reduces the flow rate of the supply air flow until the temperature of the set space reaches the target temperature.

[0018] In some embodiments of the present application, the controller controls the auxiliary heater to be closed after the temperature of the set space reaches the target temperature.

[0019] Compared with the prior art, the present application has the advantages and positive effects that: in the auxiliary heating mode, the present application first makes the compensation heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation, i.e., adjusts the compensation heat generated by the auxiliary heater based on the heat load of the set space, and then further adjusts the compensation heat generated by the auxiliary heater to keep the supply air temperature within the target supply air temperature range, i.e., adjusts the compensation heat generated by the auxiliary heater again based on the target supply air temperature range, so that the compensation heat generated by the auxiliary heater dynamically responds in the whole control process, and the user's comfort is improved.

[0020] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor based on these drawings.

[0022] Figure 1 Flowchart of the air conditioner provided by some embodiments of the present application;

[0023] Figure 2 Flowchart of the air conditioner provided by some embodiments of the present application;

[0024] Figure 3 Flowchart of the air conditioner provided by some embodiments of the present application;

[0025] Figure 4Flow chart of air conditioner provided by some embodiments of the present application;

[0026] Figure 5 Flow chart of air conditioner provided by some embodiments of the present application;

[0027] Figure 6 Flow chart of air conditioner provided by some embodiments of the present application;

[0028] Figure 7 Flow chart of air conditioner provided by some embodiments of the present application;

[0029] Figure 8 Flow chart of air conditioner provided by some embodiments of the present application;

[0030] Figure 9 Flow chart of air conditioner provided by some embodiments of the present application;

[0031] Figure 10 Structural schematic diagram of air conditioner provided by some embodiments of the present application;

[0032] Figure 11 Structural schematic diagram of air conditioner provided by some embodiments of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0036] In the description of the application, it is required to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of the application. For simplicity of the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0039] One embodiment of the present application provides an air conditioner. The air conditioner is a system that performs a refrigeration cycle of the air conditioner by a compressor, a condenser, a throttling device and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to refrigerate or heat an indoor space.

[0040] From the principle point of view, the low-temperature and low-pressure refrigerant enters the compressor, which compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0041] The throttling device expands the high-temperature and high-pressure liquid-phase refrigerant formed in the condenser into low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the throttling device and returns refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with a material to be cooled using latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of a set space to a target temperature.

[0042] The outdoor unit of the air conditioner refers to a portion of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner refers to a portion of the refrigeration cycle including the indoor heat exchanger, and the throttling device can be provided in the indoor unit and / or the outdoor unit.

[0043] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode; when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0044] In an alternative embodiment, one or more compressors can be provided in each outdoor unit, and the compressor in operation is supplied with alternating current through a frequency conversion device. When the output frequency of the frequency conversion device changes, the rotational speed of the compressor changes, achieving different air conditioning capacities.

[0045] The outdoor unit further includes an outdoor fan and a four-way valve. In addition, other conventional components such as a gas-liquid separator can be provided. The gas-liquid separator is a shell-shaped component for separating refrigerant into gas and liquid, and is usually provided on the suction side of the compressor. The outdoor heat exchanger is configured such that refrigerant flowing through the internal heat exchange pipeline thereof exchanges heat with air (or other medium such as water) guided by the outdoor fan. The outdoor fan can be an axial fan, a cross-flow fan, or other alternative fan forms. The outdoor fan is provided near the outdoor heat exchanger. The four-way valve is a valve that switches the flow direction of the refrigerant according to the operation mode of the air conditioner, i.e., in a cooling mode, the discharge side of the compressor is connected to one end of the outdoor heat exchanger via the four-way valve and piping, and the suction side of the compressor is connected to one end of the indoor heat exchanger via the four-way valve and piping. Thus, the outdoor heat exchanger functions as a condenser, and the indoor heat exchanger functions as an evaporator. Similarly, in a heating mode, the discharge side of the compressor is connected to one end of the indoor heat exchanger via the four-way valve and piping, and the suction side of the compressor is connected to one end of the outdoor heat exchanger via the four-way valve and piping. Thus, the indoor heat exchanger functions as a condenser, and the outdoor heat exchanger functions as an evaporator. The refrigerant circuit of the air conditioner sequentially connects the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger to circulate the refrigerant.

[0046] The outdoor unit contains an outdoor control circuit. This circuit is typically housed in a well-sealed electrical box. The outdoor control circuit includes components such as a processor, storage unit, input / output interfaces, and communication interfaces. The processor can be a dedicated processor, a central processing unit (CPU), etc. The processor can access the storage unit to execute instructions or applications stored therein to achieve relevant functions. The storage unit may include volatile memory and / or non-volatile memory. The input / output interfaces can communicate with various sensors located in the outdoor unit to receive their detection values. These sensors include, but are not limited to, outdoor temperature sensors, compressor suction-side temperature sensors, discharge-side temperature sensors, and discharge-side pressure sensors. The input / output interfaces can also communicate with devices such as frequency converters, compressors, outdoor fans, four-way valves, and expansion valves to output control commands generated by the processor. The communication interfaces can support different wireless communication protocols, such as Wi-Fi, Bluetooth, near-field communication (NFC), and NB-IoT, for communication with other electronic devices. Other electronic devices include, but are not limited to, cloud servers, computers (host computers), smartphones, tablets, PDAs, intelligent control fixtures, wearable devices, and vehicle-mounted devices.

[0047] In one alternative implementation, the air conditioner may include multiple outdoor units; each outdoor unit may operate independently or may be configured to operate in groups, such as two outdoor units as a group, four outdoor units as a group, etc. Each outdoor unit or each group of outdoor units is equipped with a corresponding indoor unit.

[0048] The indoor unit can employ an independent air supply structure, such as a wall-mounted air supply structure, a floor-standing air supply structure, a ducted air supply structure, or an air supply structure embedded in the ceiling, etc. The air supply structure includes a casing, within which air supply ducts are formed, and an air supply fan (also called an indoor fan, such as...). Figure 10 As shown in Figure 18, the air supply fan is installed in the air supply duct, creating an airflow that can be delivered to a designated space. The indoor heat exchanger facilitates heat exchange between the refrigerant flowing within it and the air supply airflow to increase the air supply temperature; the casing has a return air inlet and an air supply outlet (such as...). Figure 11 As shown in Figure 26), the return air inlet is used to draw in air, and the supply air inlet is used to deliver the heat-exchanged air into the designated space.

[0049] In one alternative implementation, the indoor unit is equipped with a wired controller. The wired controller is fixedly installed on the wall of the designated space (e.g., an air-conditioned room). The wired controller is provided with a setting for inputting the set temperature (e.g., temperature). Figure 10 The interface includes buttons for the operating mode (as shown in the image), and a display screen showing the real-time temperature of the set space and the operating status of the air conditioner.

[0050] In an alternative embodiment, the indoor unit is provided with a remote controller in correspondence, the remote controller is in communication connection with the indoor unit, the remote controller is provided with keys for inputting the set temperature and the operation mode, and a display interface for displaying the set space real-time temperature and the air conditioner operation state.

[0051] In an alternative embodiment, the indoor unit is provided with a mobile control terminal in correspondence, the mobile control terminal is in communication connection with the indoor unit, the mobile control terminal has an application interface, the set temperature and the operation mode can be inputted through the application interface, and the real-time temperature of the set space or the operation state can be displayed.

[0052] In an alternative embodiment, the mobile control terminal can be a computer, a tablet computer, a smart phone, a wearable device, etc.

[0053] The indoor control circuit is provided in the indoor unit, and the indoor control circuit is preferably provided with an indoor controller. The indoor controller is configured to display various parameters on the display panel, human-computer interaction, receive and process sampling signals of various sensors, and realize necessary communication functions. The indoor control circuit also includes storage units, processors, input / output interfaces, communication interfaces, and other electrical components.

[0054] The storage unit can include volatile memory and / or non-volatile memory. The storage unit is configured to store instructions or data associated with at least one component of the indoor unit, such as storing an application program. Exemplarily, the application program can be used to adjust the rotation speed (or rotation speed gear) of the air supply fan.

[0055] The indoor processor can be a dedicated processor, a central processing unit, etc. The indoor processor can access the storage unit to execute instructions stored in the storage unit to realize related functions.

[0056] The input / output interface can be in communication connection with various sensors provided in the indoor unit to receive detection values of various sensors provided in the indoor unit. The sensors include but are not limited to an air temperature sensor provided at the return air inlet (as shown in FIG. 12), a humidity sensor provided at the return air inlet, an air temperature sensor provided in the air supply duct (as shown in FIG. 14), and the like. The input / output interface can be a serial communication interface, and the input / output interface can also be in communication connection with indicator lights, buzzers, stepper motors, and other components. The stepper motor is a driving component of the air deflector and also a driving component of the shielding part which will be described in detail below. Figure 10 Figure 10 The communication interface can be a software interface supporting different wireless communication protocols, such as Wi-Fi and Bluetooth, etc.

[0057] The communication interface can be a software interface supporting different wireless communication protocols, such as Wi-Fi and Bluetooth, etc.

[0058] ​The indoor control circuit is further provided with a power supply circuit, which can provide 12V and 5V voltage.

[0059] The outdoor control circuit and the indoor control circuit are in communication connection. In some optional embodiments of the present application, the outdoor control circuit and the indoor control circuit jointly serve as the control unit to perform the control of the air conditioner.

[0060] The indoor unit further comprises an auxiliary heater (as shown in FIG. 22). Figure 10 and 11 The auxiliary heater is an electric heater with a PTC (Positive Temperature Coefficient) element, and the auxiliary heater comprises an electrode for electrifying the PTC element, a heat sink for transferring the heat of the PTC element, a frame for mounting the PTC element, and the like.

[0061] In some embodiments of the present application, as shown in FIG. 21, the control unit first drives the supply fan to form the supply air flow (as shown in step S101 of FIG. 22). After the supply fan forms the supply air flow, the real-time temperature deviation of the environment temperature of the set space from the target temperature is estimated (as shown in step S102 of FIG. 22). The control unit further determines whether the real-time temperature deviation is not lower than the set temperature deviation (as shown in step S103 of FIG. 22), and when the real-time temperature deviation is not lower than the set temperature deviation, the auxiliary heating mode is performed, the compensation heat generated by the auxiliary heater is first negatively correlated with the real-time temperature deviation (as shown in step S104 of FIG. 22), and then the compensation heat generated by the auxiliary heater is adjusted to keep the supply air temperature within the target supply air temperature range (as shown in step S105 of FIG. 22); or when the real-time temperature deviation is lower than the set temperature deviation, the heating operation mode is kept unchanged (as shown in step S106 of FIG. 22). Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1 Figure 1

[0062] In the auxiliary heating mode of the present application, the compensation heat generated by the auxiliary heater is first negatively correlated with the real-time temperature deviation, that is, the compensation heat generated by the auxiliary heater is adjusted based on the heat load of the set space, and then the compensation heat generated by the auxiliary heater is further adjusted to keep the supply air temperature within the target supply air temperature range, that is, the compensation heat generated by the auxiliary heater is adjusted again based on the target supply air temperature range, so that the compensation heat generated by the auxiliary heater dynamically responds in the whole control process, and the comfort of the user is improved.

[0063] In some embodiments of the present application, the auxiliary heater comprises a plurality of independently arranged auxiliary heating assemblies (as shown in FIG. 23). Figure 10 ​​​​​​​Each of the auxiliary heating assemblies in the working state can generate compensation heat. For example, each of the auxiliary heating assemblies is provided with a PTC element, a switching element (e.g. Figure 10 Each of the auxiliary heating assemblies can be independently switched between the working state and the off state by a switch (e.g.

[0064] In some embodiments of the present application, as shown in FIG. 2, the control unit first drives the air supply fan to form an air supply flow (as shown in step S201 of FIG. 2). After the air supply fan forms the air supply flow, the real-time temperature deviation of the environment temperature of the set space from the target temperature is estimated (as shown in step S202 of FIG. 2). The control unit further determines whether the real-time temperature deviation is not lower than the set temperature deviation (as shown in step S203 of FIG. 2), and when the real-time temperature deviation is not lower than the set temperature deviation, the auxiliary heating mode is executed, the number of the auxiliary heating assemblies in the working state is negatively correlated with the real-time temperature deviation (as shown in step S204 of FIG. 2), and then the compensation heat generated by the auxiliary heater is adjusted to keep the air supply temperature within the target air supply temperature range (as shown in step S205 of FIG. 2); or when the real-time temperature deviation is lower than the set temperature deviation, the heating operation mode remains unchanged (as shown in step S206 of FIG. 2). Figure 2 Figure 2 Figure 2 Figure 2 Figure 2 Figure 2

[0065] In some embodiments of the present application, the negative correlation between the number of the auxiliary heating assemblies in the working state and the real-time temperature deviation can be a one-to-one correspondence between the real-time temperature deviation and the number of the auxiliary heating assemblies, and the plurality of auxiliary heating assemblies have the same rated power. For example, when the real-time temperature deviation is above 6℃, all the auxiliary heating assemblies are controlled to be in the working state; when the real-time temperature deviation is above 3℃, half of the auxiliary heating assemblies are controlled to be in the working state; and when the real-time temperature deviation is above 1℃, one auxiliary heating assembly is controlled to be in the working state.

[0066] ​​​​​​In some embodiments of the present application, the number of auxiliary heating assemblies in working state can be dynamically generated when the compensation heat generated by the auxiliary heater is negatively correlated with the real-time temperature deviation. For example, a plurality of combined working modes are pre-stored in the control unit, in each of which a plurality of auxiliary heating assemblies are in different switching states, and the control unit also stores the measured power value corresponding to each combined working mode (which can be calculated based on the measured voltage and current values). Since the compensation heat generated by the auxiliary heater is positively correlated with the measured power value based on Joule's law, the control unit can execute a combined working mode according to the real-time temperature deviation, so that the compensation heat generated by the auxiliary heater is negatively correlated with the real-time temperature deviation. The number of auxiliary heating assemblies in working state in the combined working mode is the heat generated by the dynamically generated auxiliary heating assemblies.

[0067] For example, the PTC elements in each auxiliary heating assembly have different rated powers. For example, the first PTC element in the first auxiliary heating assembly has a relatively high rated power, and the second PTC element in the second auxiliary heating assembly and the third PTC element in the third auxiliary heating assembly have the same but relatively low rated power. The three PTC elements can be in working state or off state, further forming a plurality of combined working modes. The control unit can execute a corresponding combined working mode according to the real-time temperature deviation, so as to meet the data relationship that the compensation heat generated by the auxiliary heater is negatively correlated with the real-time temperature deviation. For example, when the real-time temperature deviation is about 6°C, a corresponding combined working mode is executed; when the real-time temperature deviation is about 5°C, another corresponding combined working mode is executed, and so on. When executing the combined working mode or starting the plurality of auxiliary heating assemblies, the control unit uses a sequential starting mode, in which the auxiliary heating assemblies with higher rated power are started first, so as to avoid excessive impact current generated by the auxiliary heating assemblies with higher rated power, and to prevent the auxiliary heater from exceeding the maximum allowable current due to the last starting of the auxiliary heating assemblies with higher power. In this mode, the current value fluctuates less during the starting process, and the system has better stability.

[0068] As shown in Figure 3 In some embodiments of the present application, the control unit is configured to execute the auxiliary heating mode, so that the number of auxiliary heating assemblies in working state is negatively correlated with the real-time temperature deviation; further determine whether the supply air temperature exceeds the upper threshold of the target supply air temperature range (as shown in step S306 of Figure 3 In some embodiments of the present application, the control unit is configured to execute the auxiliary heating mode, so that the number of auxiliary heating assemblies in working state is negatively correlated with the real-time temperature deviation; further determine whether the supply air temperature exceeds the upper threshold of the target supply air temperature range (as shown in step S306 of Figure 3(As shown in step S307), the supply air temperature is reduced so that it falls back to the target supply air temperature range. In some optional embodiments of this application, the control unit adopts a sequential shutdown method, first shutting down the auxiliary heating component with lower rated power to avoid excessive current fluctuations.

[0069] In some embodiments of this application, the control unit is configured to execute an auxiliary heating mode, first making the number of auxiliary heating components in operation negatively correlated with the real-time temperature deviation, and then, when the supply air temperature is lower than the lower limit threshold of the target supply air temperature range, gradually increasing the real-time rotation speed until the supply air temperature rises to exceed the lower limit threshold of the target supply air temperature range.

[0070] In some embodiments of this application, the control unit is configured to execute an auxiliary heating mode, and when the real-time speed is increased in stages until the real-time speed deviation is the lower limit speed deviation, but the air supply temperature still does not exceed the lower limit threshold of the target air supply temperature range, at least one set of auxiliary heating components that are in the off state are switched to the working state, until the air supply temperature rises to exceed the lower limit threshold of the target air supply temperature range or all auxiliary heating components are in the working state.

[0071] like Figure 4 As shown, in some embodiments of this application, the control unit is configured to execute an auxiliary heating mode. The timing of executing the auxiliary heating mode can be after power-on or when the user triggers the corresponding function in heating mode. In the auxiliary heating mode, the control unit first makes the number of auxiliary heating components in operation negatively correlated with the real-time temperature deviation; it then further determines whether the supply air temperature is lower than the lower limit threshold of the target supply air temperature range (e.g., ...). Figure 4 (As shown in step S408); when the supply air temperature is lower than the lower limit threshold of the target supply air temperature range, the real-time speed deviation between the estimated upper limit threshold of the supply air fan speed and the real-time speed (e.g., ...) is calculated. Figure 4 (See step S409); determine whether the real-time speed deviation is greater than the lower limit speed deviation (e.g., ...) Figure 4 (As shown in step S410); when the real-time speed deviation is greater than the lower limit speed deviation, the real-time speed is increased in stages (e.g., ...). Figure 4 (As shown in step S411); after increasing the real-time speed, it is determined again whether the real-time speed deviation is greater than the lower limit speed deviation (e.g., ...). Figure 4 (See step S412); when the real-time speed deviation is not greater than the lower limit speed deviation, it is determined again whether the supply air temperature is lower than the lower limit threshold of the target supply air temperature range (e.g., ...). Figure 4 (As shown in step S413); if the supply air temperature is still lower than the lower limit threshold of the target supply air temperature range, at least one set of auxiliary heating components that are in the off state will be switched to the working state (e.g.,Figure 4 In the auxiliary heating mode, when the supply air temperature is lower than the lower threshold of the target temperature interval, the control unit first increases the flow of the air flow in the supply air duct that is heated by the auxiliary heater by adjusting the rotation speed of the supply air fan, increases the heat exchange efficiency between the air and the auxiliary heater, and when the supply air temperature is still lower than the lower threshold of the target temperature interval, increases the compensation heat of the auxiliary heater, dynamically keeps the supply air temperature within the target supply air temperature interval, and achieves a comfortable use state. In some optional embodiments of the present application, the control unit starts the auxiliary heating components with the remaining higher rated power in sequence. Figure 5 In the auxiliary heating mode, when the supply air temperature is lower than the lower threshold of the target temperature interval, the control unit first increases the flow of the air flow in the supply air duct that is heated by the auxiliary heater by adjusting the rotation speed of the supply air fan, increases the heat exchange efficiency between the air and the auxiliary heater, and when the supply air temperature is still lower than the lower threshold of the target temperature interval, increases the compensation heat of the auxiliary heater, dynamically keeps the supply air temperature within the target supply air temperature interval, and achieves a comfortable use state. In some optional embodiments of the present application, the control unit starts the auxiliary heating components with the remaining higher rated power in sequence.

[0072] In some embodiments of the present application, the periodically increasing real-time rotation speed is increasing the rotation speed by a set proportion of the real-time rotation speed deviation in the initial state within a set time interval, for example, the increase amplitude of the rotation speed is 20% of the real-time rotation speed deviation in the initial state within each set time interval.

[0073] In some embodiments of the present application, when the control unit executes the auxiliary heating mode, the control unit further executes the following control: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S501); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S502), reducing the priority of the supply air temperature control (as shown in step S503), and further reducing the compensation heat generated by the auxiliary heater (as shown in step S504), i.e., safety is the control target with the highest priority. Figure 5 In some embodiments of the present application, when the control unit executes the auxiliary heating mode, the control unit further executes the following control: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S501); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S502), reducing the priority of the supply air temperature control (as shown in step S503), and further reducing the compensation heat generated by the auxiliary heater (as shown in step S504), i.e., safety is the control target with the highest priority. Figure 5 In some embodiments of the present application, when the control unit executes the auxiliary heating mode, the control unit further executes the following control: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S501); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S502), reducing the priority of the supply air temperature control (as shown in step S503), and further reducing the compensation heat generated by the auxiliary heater (as shown in step S504), i.e., safety is the control target with the highest priority. Figure 6 In some embodiments of the present application, when the control unit executes the auxiliary heating mode, the control unit further executes the following control: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S501); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S502), reducing the priority of the supply air temperature control (as shown in step S503), and further reducing the compensation heat generated by the auxiliary heater (as shown in step S504), i.e., safety is the control target with the highest priority.

[0074] In some embodiments of the present application, when the auxiliary heater is composed of a plurality of auxiliary heating components, the control unit further executes the following control when executing the auxiliary heating mode: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S601); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S602), and further closing the auxiliary heating component that reaches the compensation heat upper limit value (as shown in step S603). Figure 6 In some embodiments of the present application, when the auxiliary heater is composed of a plurality of auxiliary heating components, the control unit further executes the following control when executing the auxiliary heating mode: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S601); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S602), and further closing the auxiliary heating component that reaches the compensation heat upper limit value (as shown in step S603). Figure 6 In some embodiments of the present application, when the auxiliary heater is composed of a plurality of auxiliary heating components, the control unit further executes the following control when executing the auxiliary heating mode: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S601); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S602), and further closing the auxiliary heating component that reaches the compensation heat upper limit value (as shown in step S603). Figure 11 In some embodiments of the present application, when the auxiliary heater is composed of a plurality of auxiliary heating components, the control unit further executes the following control when executing the auxiliary heating mode: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (as shown in step S601); when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, stopping the auxiliary heating mode (as shown in step S602), and further closing the auxiliary heating component that reaches the compensation heat upper limit value (as shown in step S603).

[0075] The heat generated by the auxiliary heater can be detected by a temperature sensor arranged on the auxiliary heater, or can be calculated based on the measured current of the auxiliary heater.

[0076] In some embodiments of this application, when the auxiliary heater consists of multiple auxiliary heating components, the control unit, when executing the auxiliary heating mode, also performs the following control: determining whether the heat compensation generated by the auxiliary heater has reached the set upper limit of the compensation heat; when the compensation heat generated by the auxiliary heater reaches the set upper limit of the compensation heat, stopping the auxiliary heating mode and switching to another combined working mode. In the switched combined working mode, the auxiliary heating component that has reached the upper limit of the compensation heat is in the off state, and among all combined working modes, the difference between the measured power values ​​of the switched combined working mode and the previous combined working mode is the smallest. Using this method, while ensuring safe use, even when the auxiliary heating mode is stopped, a relatively stable heating effect can be maintained, avoiding an excessive decrease in user experience.

[0077] In some embodiments of this application, the air supply duct has an adjustable shielding portion (e.g. Figure 7 (As shown in Figure 28). The obstruction is configured to prevent part of the supply airflow from entering the designated space and to guide the blocked supply airflow to the auxiliary heater for reheating. The obstruction can be a damper at the air outlet, or a plate-shaped or volute-shaped component constructed inside the air supply duct.

[0078] The control unit executes the auxiliary heating mode and determines whether the supply air temperature is higher than the upper limit threshold of the target supply air temperature range (e.g., ...). Figure 7 (As shown in step S701), it is simultaneously determined whether the supply air temperature is lower than the lower limit threshold of the target supply air temperature range (e.g., ...). Figure 7 (As shown in step S702) When the supply air temperature is higher than the upper threshold of the temperature range of the target supply air temperature or lower than the lower threshold of the temperature range, the angle of the shielding part is adjusted so that the flow rate of the supply air is negatively correlated with the deviation of the supply air temperature from the target supply air temperature range, that is, it increases as the deviation of the supply air temperature from the target supply air temperature range decreases (e.g., Figure 7 (As shown in step S703) The obstructed portion of the supply airflow is guided to the auxiliary heater for reheating until the supply air temperature is maintained within the target supply air temperature range (e.g., ...). Figure 8 (As shown in step S704); adjust the angle of the shielding part so that the shielding part avoids the air supply duct and no longer prevents the air supply airflow from entering the set space.

[0079] In some embodiments of this application, such as Figure 8 As shown, if the controller stops the auxiliary heating mode and shuts down the auxiliary heating component that has reached the upper limit of the compensation heat (e.g.) Figure 8 (As shown in steps S801 and S802), the controller simultaneously adjusts the angle of the shielding part to reduce the airflow until the temperature of the set space reaches the target temperature (e.g., Figure 9If the temperature deviation is not within the predetermined range (NO in step S803), the controller determines whether the temperature deviation is greater than the predetermined threshold (step S804). If the temperature deviation is greater than the predetermined threshold (YES in step S804), the controller determines that the temperature deviation is large (step S805). If the temperature deviation is not greater than the predetermined threshold (NO in step S804), the controller determines that the temperature deviation is small (step S806).

[0080] In some embodiments of the present application, as shown in FIG. 9, the controller controls the auxiliary heater to be turned off after the temperature of the set space reaches the target temperature, regardless of whether the auxiliary heating mode is suspended during the entire control process. Figure 9 ​

[0081] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0082] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.​​

Claims

1. An air conditioner for adjusting a temperature of a set space to a target temperature, comprising: an indoor unit having: a supply air duct in which a supply air fan is provided to form a supply air flow that can be supplied to the set space; an indoor heat exchanger for heat exchanging a refrigerant flowing therein with the supply air flow to increase a supply air temperature; and an auxiliary heater for heating the supply air flow to increase the supply air temperature; characterized in that: the auxiliary heater comprises a plurality of independently provided auxiliary heating assemblies, each of which in an operating state can generate compensation heat; further comprising: a control unit configured to, after the supply air fan forms the supply air flow, estimate a real-time temperature deviation of an ambient temperature of the set space from the target temperature, and when the real-time temperature deviation is not lower than a set temperature deviation, execute an auxiliary heating mode, first make the compensation heat generated by the auxiliary heater positively correlated with the real-time temperature deviation, and then adjust the compensation heat generated by the auxiliary heater to keep the supply air temperature within a target supply air temperature range. the control unit is configured to, in the auxiliary heating mode, first make a number of the auxiliary heating assemblies in the operating state positively correlated with the real-time temperature deviation, and then when the supply air temperature is lower than a lower threshold of a temperature range of the target supply air temperature range, stage-by-stage increase a real-time rotating speed of the supply air fan until the supply air temperature increases to be higher than the lower threshold of the temperature range of the target supply air temperature range. the control unit is configured to, in the auxiliary heating mode, estimate a real-time rotating speed deviation between a real-time rotating speed and an upper threshold of the rotating speed, and when a condition that the real-time rotating speed is stage-by-stage increased until the real-time rotating speed deviation is a lower threshold of the rotating speed deviation, but the supply air temperature does not exceed the lower threshold of the temperature range of the target supply air temperature range is met, switch at least one group of the auxiliary heating assemblies in an off state to the operating state until the supply air temperature increases to be higher than the lower threshold of the temperature range of the target supply air temperature range or all the auxiliary heating assemblies are in the operating state.

2. The air conditioner according to claim 1, characterized in that: the control unit is configured to, in the auxiliary heating mode, first make the number of the auxiliary heating assemblies in the operating state positively correlated with the real-time temperature deviation, and then adjust the number of the auxiliary heating assemblies in the operating state to keep the supply air temperature within the target supply air temperature range.

3. The air conditioner according to claim 2, characterized in that: the control unit is configured to, in the auxiliary heating mode, first make the number of the auxiliary heating assemblies in the operating state positively correlated with the real-time temperature deviation, and then when the supply air temperature exceeds an upper threshold of a temperature range of the target supply air temperature range, switch at least one group of the auxiliary heating assemblies in the operating state to the off state.

4. The air conditioner according to claim 1, characterized in that: the control unit, when executing the auxiliary heating mode, further executes the following control: When the compensation heat generated by the auxiliary heater reaches a set upper limit of compensation heat, the auxiliary heating mode is suspended and the compensation heat generated by the auxiliary heater is reduced.

5. The air conditioner of claim 4, wherein: When the compensation heat generated by any one of the auxiliary heating assemblies in operation reaches an upper limit of compensation heat, the auxiliary heating mode is suspended and the auxiliary heating assembly reaching the upper limit of compensation heat is turned off.

6. The air conditioner of any one of claims 1 to 5, wherein: The air supply duct has an adjustable blocking part configured to block part of the air supply flow from entering the set space and direct the blocked part of the air supply flow to the auxiliary heater for re-heating; The control part executes the auxiliary heating mode and adjusts the angle of the blocking part when the air supply temperature deviates from the target air supply temperature range, so that the flow of the air supply flow is positively correlated with the deviation of the air supply temperature from the target air supply temperature range, until the air supply temperature is kept within the target air supply temperature range, the blocking part avoids the air supply duct and no longer blocks the air supply flow from entering the set space.

7. The air conditioner of claim 6, wherein: If the control part suspends the auxiliary heating mode and turns off the auxiliary heating assembly reaching the upper limit of compensation heat, the control part simultaneously adjusts the angle of the blocking part to reduce the flow of the air supply flow until the temperature of the set space reaches the target temperature.

8. The air conditioner of claim 1, wherein: The control part controls the auxiliary heater to be turned off when the temperature of the set space reaches the target temperature.

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