Air conditioner

Abstract

The invention discloses an air conditioner, which is used for adjusting the temperature of a set space to a target temperature, and comprises an indoor unit, which is provided with an air supply duct in which an air supply fan is arranged to form an air supply flow capable of being sent into the set space; the indoor heat exchanger is used for enabling a refrigerant flowing in the indoor heat exchanger to exchange heat with the air supply airflow so as to increase the air supply temperature; the auxiliary heater is used for heating the blowing air flow to increase the blowing temperature; a control unit that estimates a real-time temperature deviation between an ambient temperature of the set space and a target temperature after the blower fan forms the blowing air flow; and when the real-time temperature deviation is not lower than the set temperature deviation, an auxiliary heating mode is executed, compensation heat generated by an auxiliary heater is made to be in negative correlation with the real-time temperature deviation, and then the compensation heat generated by the auxiliary heater is adjusted so that the air supply temperature can be kept within the target air supply temperature interval. The air conditioner provided by the invention has better user comfort when the auxiliary heater is started.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0002] The existing air conditioner is provided with an auxiliary heating component 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 predetermined control mode to achieve the effect of increasing the air supply temperature.

[0003] However, due to the large differences in ambient temperature in air-conditioned rooms, the heating effects of the auxiliary heating components vary greatly when operating at different ambient temperatures, and cannot meet the user's usage needs well and achieve a matching user experience.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of the large difference in ambient temperature between air-conditioned rooms, when operating at different ambient temperatures, the heating effect of the auxiliary heating component varies greatly, which cannot meet the user's usage needs well and achieve a 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 includes an indoor unit, which further includes an air supply duct, an indoor heat exchanger and an auxiliary heater; wherein the air supply duct is provided with an air supply fan to form an air supply airflow that can be sent into the set space; the indoor heat exchanger is used to make the flowing refrigerant therein exchange heat with the air supply airflow to increase the air supply temperature; and the auxiliary heat exchanger is used to heat the air supply airflow to increase the air supply temperature.

[0007] In some embodiments of the present application, the air conditioner also includes a control unit, which estimates the real-time temperature deviation of the ambient temperature of the set space compared to the target temperature after the air supply fan forms an air supply airflow; and when the real-time temperature deviation is not lower than the set temperature deviation, executes an auxiliary heating mode, first making the compensating heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation, and then adjusting the compensating 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 includes a plurality of independently arranged auxiliary heating components, and each auxiliary heating component in a working state can generate compensation heat.

[0009] In some embodiments of the present 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 adjusting the number of auxiliary heating components in operation 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 an auxiliary heating mode, first making the number of auxiliary heating components in operation negatively correlated with the real-time temperature deviation, and then switching at least one group of auxiliary heating components in operation to an off state when the supply air temperature exceeds an upper threshold value of a temperature range of a target supply air temperature range.

[0011] In some embodiments of the present 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 temperature range of the target supply air temperature range; the real-time rotation speed is increased in stages until the supply air temperature rises to exceed the lower limit 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 an auxiliary heating mode, estimate the real-time speed deviation between the upper speed threshold and the real-time speed, and when the condition of gradually increasing the real-time speed until the real-time speed deviation is the lower speed deviation, but the supply air temperature does not exceed the lower limit threshold of the temperature range of the target supply air temperature range is met, at least one group of auxiliary heating components that are in a closed state are switched to a working state until the supply air temperature rises to a temperature range exceeding the lower limit threshold of the target supply air temperature range or all auxiliary heating components are in a working state.

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

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

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

[0016] In some embodiments of the present application, the control unit executes an auxiliary heating mode and adjusts the angle of the shielding portion 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 remains within the target supply air temperature range, the shielding portion 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 terminates the auxiliary heating mode and turns off the auxiliary heating component that reaches the upper limit of the compensation heat, the controller simultaneously adjusts the angle of the shielding portion to reduce 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 turn off after the temperature of the setting space reaches the target temperature.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are: in the auxiliary heating mode, the present invention first makes the compensating heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation, that is, the compensating heat generated by the auxiliary heater is adjusted once based on the heat load of the set space, and then the compensating 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 compensating heat generated by the auxiliary heater is adjusted again based on the target supply air temperature range, so that the compensating heat generated by the auxiliary heater responds dynamically during the entire control process, thereby improving the user's comfort.

[0020] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A flow chart of an air conditioner provided by some embodiments of the present invention; Figure 2 A flow chart of an air conditioner provided by some embodiments of the present invention; Figure 3 A flow chart of an air conditioner provided by some embodiments of the present invention; Figure 4 A flow chart of an air conditioner provided by some embodiments of the present invention; Figure 5A flow chart of an air conditioner provided by some embodiments of the present invention; Figure 6 A flow chart of an air conditioner provided by some embodiments of the present invention; Figure 7 A flow chart of an air conditioner provided by some embodiments of the present invention; Figure 8 A flow chart of an air conditioner provided by some embodiments of the present invention; Fig. 9 A flow chart of an air conditioner provided by some embodiments of the present invention; Fig.10 A schematic diagram of the structure of an air conditioner provided by some embodiments of the present invention; Fig.11 A schematic diagram of the structure of an air conditioner provided in some embodiments of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0029] 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 through 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 cool or heat an indoor space.

[0030] From a principle perspective, low-temperature, low-pressure refrigerant enters the compressor, which compresses it into high-temperature, high-pressure refrigerant gas 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.

[0031] The throttling device expands the high-temperature and high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded 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 cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the entire cycle, the air conditioner can adjust the temperature of the set space to the target temperature.

[0032] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner refers to the part of the refrigeration cycle including the indoor heat exchanger, and the throttling device may be provided in the indoor unit and / or the outdoor unit.

[0033] 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.

[0034] In an optional implementation, one or more compressors may be provided in each outdoor unit, and AC power is supplied to the working compressors through a frequency conversion device. When the output frequency of the frequency conversion device changes, the speed of the compressor changes, thereby achieving different air conditioning capacities.

[0035] The outdoor unit is also provided with an outdoor fan and a four-way valve. In addition, other conventional components such as a gas-liquid separator may also be provided. The gas-liquid separator is a shell-shaped component used to separate the refrigerant into gas and liquid, and is usually provided on the suction side of the compressor. The outdoor heat exchanger is configured to exchange heat between the refrigerant flowing through its internal heat exchange pipeline and the air (or other medium, such as water) guided by the outdoor fan. The outdoor fan may be an axial flow fan, a cross-flow fan or other optional 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, that is, in the cooling mode, the discharge side of the compressor is connected to one end of the outdoor heat exchanger via a four-way valve or other pipeline, and the suction side of the compressor is connected to one end of the indoor heat exchanger via a four-way valve or other pipeline; thus, the outdoor heat exchanger functions as a condenser, and the indoor heat exchanger functions as an evaporator. Similarly, in the heating mode, the discharge side of the compressor is connected to one end of the indoor heat exchanger via a four-way valve and piping, and the suction side of the compressor is connected to one end of the outdoor heat exchanger via a 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, outdoor heat exchanger, expansion valve, and indoor heat exchanger to circulate the refrigerant.

[0036] An outdoor control circuit is provided in the outdoor unit. The outdoor control circuit is usually provided in an electrical box with good sealing performance. The outdoor control circuit includes components such as a processor, a storage unit, an input / output interface, and a communication interface. The processor may be a dedicated processor, a central processing unit (CPU), etc. The processor may access the storage unit to execute instructions or applications stored in the storage unit to realize related functions. The storage unit may include a volatile memory and / or a non-volatile memory. The input / output interface may be connected to various sensors provided in the outdoor unit in communication to receive detection values ​​of various sensors provided in the outdoor unit. Sensors include but are not limited to outdoor temperature sensors, temperature sensors on the suction side of the compressor, temperature sensors on the discharge side, and pressure sensors on the discharge side. The input / output interface may be connected to frequency conversion modules, compressors, outdoor fans, four-way valves, expansion valves, and other devices in communication to output control instructions generated by the processor to them. The communication interface may support different wireless communication protocols, such as Wi-Fi, Bluetooth, near field communication, and NB-IoT, etc., to communicate with other electronic devices. Other electronic devices include but are not limited to cloud servers, computers (host computers), smart phones, tablet computers, PDAs, intelligent control tools, wearable devices and vehicle-mounted devices, etc.

[0037] In an optional embodiment, the air conditioner may include multiple outdoor units; each outdoor unit may work independently or in groups, such as two outdoor units in one group, four outdoor units in one group, etc. Each outdoor unit or each group of outdoor units is equipped with a corresponding indoor unit.

[0038] The indoor unit can adopt an independent air supply structure, such as a wall-mounted air supply structure, a floor-standing air supply structure, a duct-type air supply structure, or an air supply structure embedded in the ceiling. The air supply structure includes a shell, an air supply duct is formed in the shell, and an air supply fan (also called an indoor fan, such as Fig.10 18) is arranged in the air supply duct, and the air supply fan can form an air supply airflow in the air supply duct that can be sent into the set space. The indoor heat exchanger is used to make the refrigerant flowing in the indoor heat exchanger exchange heat with the air supply airflow to increase the air supply temperature; the shell has a return air port and an air supply port (as shown in FIG. Fig.11 As shown in 26 in the figure), the return air inlet is used to inhale air, and the supply air inlet is used to deliver the air after heat exchange into the set space.

[0039] In an optional embodiment, the indoor unit is matched with a wired controller. The wired controller is fixedly installed on the wall of a set space (such as an air-conditioned room). The wired controller is provided with a function for inputting a set temperature (such as Fig.10 The display interface includes the buttons for setting the real-time temperature of the set space and the operating status of the air conditioner.

[0040] In an optional embodiment, the indoor unit is matched with a corresponding remote control, which is communicated with the indoor unit. The remote control is provided with buttons for inputting set temperature and operation mode, as well as a display interface for displaying the real-time temperature of the set space and the operating status of the air conditioner.

[0041] In an optional embodiment, the indoor unit is matched with a mobile control terminal, which is communicated with the indoor unit. The mobile control terminal has an application interface, through which the set temperature and operation mode can be input and the real-time temperature or operation status of the set space can be displayed.

[0042] In an optional implementation, the mobile control terminal may be a computer, a tablet computer, a smart phone, a wearable device, etc.

[0043] The indoor unit is provided with an indoor control circuit, and the indoor control circuit is preferably provided with an indoor controller. The indoor controller is configured to display various parameters on a display panel, human-computer interaction, receive and process sampling signals of various sensors, and realize necessary communication functions. The indoor control circuit also includes electrical components such as a storage unit, a processor, an input / output interface, and a communication interface.

[0044] The storage unit may include a volatile memory and / or a 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. Exemplarily, the application may be used to adjust the speed (or speed gear) of the air supply fan.

[0045] The indoor processor may be a dedicated processor, a central processing unit, etc. The indoor processor may access the storage unit to execute instructions stored in the storage unit to implement relevant functions.

[0046] The input / output interface can be connected to various sensors installed in the indoor unit to receive the detection values ​​of various sensors installed in the indoor unit. The sensors include but are not limited to air temperature sensors installed at the return air outlet (such as Fig.10 12), a humidity sensor disposed at the return air outlet, and an air temperature sensor disposed in the air supply duct (as shown in FIG. Fig.10 14 in the figure), etc. The input / output interface may be a serial communication interface, and the input / output interface may also be connected to components such as indicator lights, buzzers, and stepper motors for communication. The stepper motor is a driving component of the air guide plate, and is also a driving component of the shielding part to be described in detail below.

[0047] The communication interface may be a software interface that supports different wireless communication protocols, such as Wi-Fi and Bluetooth.

[0048] The indoor control circuit is also provided with a power supply circuit which can provide 12V and 5V voltages.

[0049] 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 are used together as a control unit to control the air conditioner.

[0050] The indoor unit also includes an auxiliary heater (such as Fig.10 and 11 22). The auxiliary heater is an electric heater having a PTC (Positive Temperature Coefficient) element, and the auxiliary heater includes: an electrode for energizing the PTC element; a heat sink for transferring heat from the PTC element; a frame for mounting the PTC element, and other parts.

[0051] In some embodiments of the present application, Figure 1 As shown, the control unit first drives the air supply fan to form an air supply airflow (such as Figure 1 After the air supply fan forms the air supply airflow, the real-time temperature deviation of the ambient temperature of the set space compared to the target temperature is estimated (such as Figure 1 The control unit further determines whether the real-time temperature deviation is not lower than the set temperature deviation (such as Figure 1 As shown in step S103 in the figure), and when the real-time temperature deviation is not lower than the set temperature deviation, the auxiliary heating mode is executed, firstly making the compensation heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation (such as Figure 1 Then, the compensation heat generated by the auxiliary heater is adjusted to keep the supply air temperature within the target supply air temperature range (such as Figure 1 or when the real-time temperature deviation is lower than the set temperature difference, the heating operation mode is kept unchanged (such as Figure 1 (as shown in step S106).

[0052] In the auxiliary heating mode, the present invention first makes the compensating heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation, that is, the compensating heat generated by the auxiliary heater is adjusted once based on the heat load of the set space, and then the compensating 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 compensating heat generated by the auxiliary heater is adjusted again based on the target supply air temperature range, so that the compensating heat generated by the auxiliary heater responds dynamically during the entire control process, thereby improving the user's comfort.

[0053] In some embodiments of the present application, the auxiliary heater includes a plurality of independently arranged auxiliary heating components (such as Fig.10As shown in 22, each auxiliary heating component in working state can generate compensation heat. For example, each auxiliary heating component has a PTC element, a switch element (such as Fig.10 24) is arranged corresponding to the PCT element so that each auxiliary heating component can be independently switched between the working state and the closed state.

[0054] In some embodiments of the present application, Figure 2 As shown, the control unit first drives the air supply fan to form an air supply airflow (such as Figure 2 After the air supply fan forms the air supply airflow, the real-time temperature deviation of the ambient temperature of the set space compared to the target temperature is estimated (such as Figure 2 The control unit further determines whether the real-time temperature deviation is not lower than the set temperature deviation (such as Figure 2 As shown in step S203 in the figure), and when the real-time temperature deviation is not lower than the set temperature deviation, the auxiliary heating mode is executed, firstly making the number of auxiliary heating components in working state negatively correlated with the real-time temperature deviation (such as Figure 2 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 S205 in 2); or when the real-time temperature deviation is lower than the set temperature difference, the heating operation mode is kept unchanged (as shown in step S206 in 2). Figure 2 (as shown in step S206).

[0055] In some embodiments of the present application, the number of auxiliary heating components in operation is negatively correlated with the real-time temperature deviation, which can be a one-to-one correspondence between the real-time temperature deviation and the number of auxiliary heating components, and multiple auxiliary heating components have the same rated power. For example, when the real-time temperature deviation is above 6°C, all auxiliary heating components are controlled to be in operation; when the real-time temperature deviation is above 3°C, half of the auxiliary heating components are controlled to be in operation; when the real-time temperature deviation is above 1°C, one auxiliary heating component is controlled to be in operation.

[0056] In some embodiments of the present application, when the compensation heat generated by the auxiliary heater is negatively correlated with the real-time temperature deviation, the number of auxiliary heating components in working state can be dynamically generated. Exemplarily, a plurality of combined working modes are pre-stored in the control unit, and a plurality of auxiliary heating components in each combined working mode are in different switch states respectively. The control unit also stores the measured power value corresponding to the combined working mode (exemplarily, it can be calculated based on the measured voltage value and current value). 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 components in working state in the combined working mode is the heat of the dynamically generated auxiliary heating components.

[0057] Exemplarily, 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, 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. All three PTC elements can be in working state or off state, and further, multiple combined working modes can be formed, and the control unit can execute a corresponding combined working mode according to the real-time temperature deviation 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 multiple auxiliary heating assemblies, the control unit adopts a sequential start-up method, first starting the auxiliary heating assembly with a higher rated power, avoiding the auxiliary heating assembly with a higher rated power from generating excessive impact current, and also preventing the auxiliary heating assembly with a higher power from being started last, causing the auxiliary heater to exceed the maximum allowable current. In this way, the current value fluctuates less during the startup process, and the system stability is better.

[0058] like Figure 3 As shown, 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 working state negatively correlated with the real-time temperature deviation; further determining whether the supply air temperature exceeds the upper temperature interval threshold value of the target supply air temperature interval (such as Figure 3 As shown in step S306 in the figure), when the air supply temperature exceeds the upper threshold of the temperature interval of the target air supply temperature interval, at least one set of auxiliary heating components in the working state is switched to the off state (such as Figure 3In some optional embodiments of the present application, the control unit adopts a sequential shutdown method to first shut down the auxiliary heating components with lower rated power to avoid excessive fluctuations in current.

[0059] In some embodiments of the present 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 temperature range of the target supply air temperature range, the real-time rotation speed is increased in stages until the supply air temperature rises to exceed the lower limit threshold of the temperature range of the target supply air temperature range.

[0060] In some embodiments of the present application, the control unit is configured to execute an auxiliary heating mode, and when the real-time speed deviation is gradually increased until the real-time speed deviation is a lower speed deviation, but the supply air temperature still does not exceed the lower limit threshold of the temperature range of the target supply air temperature range, at least one group of auxiliary heating components that are in a closed state are switched to a working state until the supply air temperature rises to exceed the lower limit threshold of the temperature range of the target supply air temperature range or all auxiliary heating components are in a working state.

[0061] like Figure 4 As shown, in some embodiments of the present application, the control unit is configured to execute the auxiliary heating mode, and the time point for executing the auxiliary heating mode can be after the machine is turned on, or when the user triggers the corresponding function in the heating mode. In the auxiliary heating mode, the control unit first makes the number of auxiliary heating components in the working state negatively correlated with the real-time temperature deviation; further determines whether the supply air temperature is lower than the lower limit threshold of the temperature range of the target supply air temperature range (such as Figure 4 When the air supply temperature is lower than the lower limit threshold of the temperature range of the target air supply temperature range, the real-time speed deviation between the upper limit threshold of the speed of the air supply fan and the real-time speed is estimated (such as Figure 4 As shown in step S409); determine whether the real-time speed deviation is greater than the lower speed deviation (such as Figure 4 When the real-time speed deviation is greater than the lower speed deviation, the real-time speed is increased in stages (such as Figure 4 After the real-time speed is increased, it is determined again whether the real-time speed deviation is greater than the lower speed deviation (such as Figure 4 In step S412); when the real-time speed deviation is not greater than the lower speed deviation, it is determined again whether the supply air temperature is lower than the lower limit threshold value of the temperature range of the target supply air temperature range (such as Figure 4 If the air supply temperature is still lower than the lower limit threshold of the target air supply temperature range, at least one set of auxiliary heating components in the off state is switched to the working state (such as Figure 4 or when the air supply temperature is no longer lower than the lower limit threshold of the temperature range of the target air supply temperature range, the current control mode is maintained unchanged (eg Figure 4 That is, in the auxiliary heating mode, when the supply air temperature is lower than the lower limit threshold of the temperature range of the target temperature range, the flow rate of the supply air flow in the supply air duct, which is increased by the auxiliary heater to increase the supply air temperature, is first increased by adjusting the speed of the supply air fan, thereby improving the heat exchange efficiency between the air and the auxiliary heater, and when the supply air temperature is still lower than the lower limit threshold of the temperature range of the target temperature range, the compensation heat of the auxiliary heat exchanger is increased, so that the supply air temperature is dynamically maintained within the target supply air temperature range to achieve a comfortable use state. In some optional embodiments of the present application, the control unit adopts a sequential start-up method to first start the remaining auxiliary heating components with higher rated power.

[0062] In some embodiments of the present application, the real-time speed is increased in stages by increasing the speed according to a set ratio of the real-time speed deviation in the initial state within a set time interval. For example, within each set time interval, the speed increase is 20% of the real-time speed deviation in the initial state.

[0063] In some embodiments of the present application, when the control unit executes the auxiliary heating mode, it also executes the following control: determining whether the compensation heat generated by the auxiliary heater reaches a set compensation heat upper limit value (such as Figure 5 When the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit, the auxiliary heating mode is terminated and the priority of the air supply temperature control is reduced (such as Figure 5 As shown in step S502, further reducing the compensation heat generated by the auxiliary heater (such as Figure 5 As shown in step S503 in the figure), that is, safety is taken as the control target with the highest priority.

[0064] In some embodiments of the present application, when the auxiliary heater is composed of a plurality of auxiliary heating components, the control unit further performs the following control when executing the auxiliary heating mode: determining whether the heat compensation generated by the auxiliary heater reaches a set compensation heat upper limit value (such as Figure 6 When the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit, the auxiliary heating mode is terminated (eg Figure 6 As shown in step S602, the auxiliary heating component that reaches the upper limit of the compensation heat is further turned off (such as Figure 6 (as shown in step S603).

[0065] The heat generated by the auxiliary heater may be detected by a temperature sensor disposed on the auxiliary heater, or may be estimated based on the actual current measured by the auxiliary heater.

[0066] In some embodiments of the present application, when the auxiliary heater is composed of multiple auxiliary heating components, the control unit also performs the following control when executing the auxiliary heating mode: determine whether the heat compensation generated by the auxiliary heater reaches the set compensation heat upper limit value; when the compensation heat generated by the auxiliary heater reaches the set compensation heat upper limit value, terminate the auxiliary heating mode and switch to another combined working mode. In the combined working mode after switching, the auxiliary heating component that reaches the compensation heat upper limit value is in a closed state and in all combined working modes, the difference between the measured power values ​​of the combined working mode after switching and the combined working mode before switching is the smallest. In this way, while ensuring safe use, even if the auxiliary heating mode is terminated, a relatively stable heating effect can be maintained to avoid excessive reduction in user experience.

[0067] In some embodiments of the present application, the air supply duct has an adjustable shielding portion (such as Fig.11 28). The shielding portion is configured to block part of the air supply airflow from entering the set space and guide the blocked part of the air supply airflow to the auxiliary heater for reheating. The shielding portion can be a damper at the air supply port, or a plate-shaped or volute-shaped component constructed inside the air supply duct.

[0068] The control unit executes the auxiliary heating mode and determines whether the air supply temperature is higher than the upper limit threshold of the temperature range of the target air supply temperature range (such as Figure 7 As shown in step S701, it is determined whether the air supply temperature is lower than the lower limit threshold of the temperature range of the target air supply temperature range (such as Figure 7 As shown in step S702, when the supply air temperature is higher than the upper limit threshold of the temperature interval of the target supply air temperature or lower than the lower limit threshold of the temperature interval, the angle of the shielding portion is adjusted 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 interval, that is, it increases as the deviation of the supply air temperature from the target supply air temperature interval decreases (such as Figure 7 As shown in step S703, the shielding portion guides the blocked part of the supply air flow to the auxiliary heater for reheating until the supply air temperature is maintained within the target supply air temperature range (such as Figure 7 As shown in step S704); adjust the angle of the shielding portion so that the shielding portion avoids the air supply duct and no longer prevents the air supply airflow from entering the set space.

[0069] In some embodiments of the present application, Figure 8 As shown, if the controller terminates the auxiliary heating mode and turns off the auxiliary heating component that has reached the upper limit of the compensation heat (such as Figure 8 As shown in steps S801 and S802 in the figure), the controller simultaneously adjusts the angle of the shielding portion to reduce the flow rate of the air supply airflow until the temperature of the set space reaches the target temperature (such as Figure 8As shown in step S803 in the figure, a large amount of supply air flow with temperature deviation is prevented from entering the set space.

[0070] In some embodiments of the present application, Fig. 9 As shown, regardless of whether the auxiliary heating mode is terminated during the entire control process, the controller controls the auxiliary heater to turn off after the temperature of the set space reaches the target temperature (such as Fig. 9 7 and 8).

[0071] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0072] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioner for adjusting the temperature of a set space to a target temperature, comprising: An indoor unit having: an air supply duct, in which an air supply fan is provided to form an air supply airflow that can be delivered into the set space; an indoor heat exchanger, which is used to allow the refrigerant flowing therein to exchange heat with the supply air flow to increase the supply air temperature; and an auxiliary heater, which is used to heat the supply air flow to increase the supply air temperature; It is characterized by further comprising: A control unit, wherein after the air supply fan forms the supply airflow, the control unit 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 the set temperature deviation, an auxiliary heating mode is executed, firstly making the compensating heat generated by the auxiliary heater negatively correlated with the real-time temperature deviation, and then adjusting the compensating heat generated by the auxiliary heater to keep the supply air temperature within the target supply air temperature range.

2. The air conditioner according to claim 1, characterized in that: The auxiliary heater comprises a plurality of independently arranged auxiliary heating components, and each of the auxiliary heating components in working state can generate compensation heat; The control unit is configured to execute the auxiliary heating mode, first making the number of the auxiliary heating components in operation negatively correlated with the real-time temperature deviation, and then adjusting the number of the auxiliary heating components in operation 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 execute the auxiliary heating mode, first making the number of the auxiliary heating components in a working state negatively correlated with the real-time temperature deviation, and then switching at least one group of the auxiliary heating components in a working state to a closed state when the supply air temperature exceeds the temperature range upper limit threshold of the target supply air temperature range.

4. The air conditioner according to claim 3, characterized in that: The control unit is configured to execute an auxiliary heating mode, first making the number of the 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 temperature range 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 temperature range of the target supply air temperature range.

5. The air conditioner according to claim 4, characterized in that: The control unit is configured to execute the auxiliary heating mode, estimate the real-time speed deviation between the upper speed threshold and the real-time speed, and when the condition of gradually increasing the real-time speed until the real-time speed deviation is the lower speed deviation but the supply air temperature does not exceed the lower limit threshold of the temperature range of the target supply air temperature range is met, switch at least one group of the auxiliary heating components that are in the off state to the working state until the supply air temperature rises to exceed the lower limit threshold of the temperature range of the target supply air temperature range or all the auxiliary heating components are in the working state.

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

7. The air conditioner according to claim 6, characterized in that: The auxiliary heater comprises a plurality of independently arranged auxiliary heating components, and each of the auxiliary heating components in working state can generate compensation heat; When the compensation heat generated by any one of the auxiliary heating components in operation reaches the upper limit of the compensation heat, the auxiliary heating mode is terminated, and the auxiliary heating component that has reached the upper limit of the compensation heat is turned off.

8. The air conditioner according to any one of claims 1 to 7, characterized in that: The air supply duct has an adjustable shielding portion, and the shielding portion is configured to block part of the air supply airflow from entering the set space and guide the blocked part of the air supply airflow to the auxiliary heater for reheating; The control unit executes an auxiliary heating mode and adjusts the angle of the shielding portion 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 amount of the supply air temperature from the target supply air temperature range, until the supply air temperature is maintained within the target supply air temperature range, the shielding portion avoids the supply air duct and no longer prevents the supply air flow from entering the set space.

9. The air conditioner according to claim 8, characterized in that: If the controller terminates the auxiliary heating mode and turns off the auxiliary heating component that has reached the upper limit of the compensation heat, the controller simultaneously adjusts the angle of the shielding portion to reduce the flow rate of the supply air flow until the temperature of the set space reaches the target temperature.

10. The air conditioner according to claim 1, characterized in that: The controller controls the auxiliary heater to be turned off after the temperature of the setting space reaches the target temperature.

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