Air conditioner and control method thereof

Abstract

The invention provides an air conditioner and a control method thereof.The air conditioner comprises a refrigerant circulation loop and a controller, and the controller is configured to determine a time constant, an air conditioner output capacity calculation equation and a delay response expression; the output capacity of the air conditioner is determined according to the time constant, the air conditioner output capacity calculation equation and the delay response expression; and the output capacity of the air conditioner is sent to the user terminal. By introducing the concept of the time constant, according to the time constant, the air conditioner output capacity calculation equation and the delay response expression, the numerical value of the air conditioner operation capacity can be calculated and fed back to a user through the user terminal, and therefore the operation capacity of the air conditioner can be accurately detected under the condition that an additional detection device does not need to be added. The effect of detecting the operation capacity of the air conditioner is achieved, the cost of the air conditioner is reduced, operation data are simple, the calculation accuracy is high, a user can accurately know the operation state and performance of the air conditioner in real time, and then the satisfaction degree of the user can be improved.

Description

Technical Field

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

[0002] Air conditioners are a widely used electrical appliance in our daily lives. They play a vital role in regulating indoor temperature, providing users with a healthy and comfortable indoor environment that meets their normal work, living, and learning needs. Currently, with the advancement of air conditioning technology, the real-time capacity calculation of conventional air conditioners has become increasingly problematic. Existing methods primarily focus on calculating air conditioner operating capacity: adding temperature and pressure detection devices to the inlet and outlet of the indoor unit evaporator to calculate the evaporator's inlet and outlet enthalpies, calculating the air conditioner's capacity using the enthalpy difference method, and detecting the air enthalpy values ​​at the inlet and outlet of the air conditioner to calculate the air conditioner's capacity using the air enthalpy difference method.

[0003] Both of the above methods of calculating capacity involve calculating fluid enthalpy. However, detecting temperature and pressure to obtain enthalpy requires adding temperature and pressure detection devices at the inlet / outlet of the evaporator, while using an electronic expansion valve to infer the mass flow rate. The enthalpy difference method is used to accurately calculate the air conditioner capacity. This is costly and requires high computing power and memory of the machine. Summary of the Invention

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

[0005] To this end, one purpose of the present invention is to propose an air conditioner that can detect the operating capacity of the air conditioner without adding additional detection devices, thereby reducing the cost of the air conditioner. The calculation data is simple and the calculation accuracy is high, so that users can accurately understand the operating status and performance of the air conditioner in real time, which is conducive to improving user satisfaction.

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

[0007] In order to achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes an air conditioner, which includes: a refrigerant circulation loop, so that the refrigerant performs a refrigeration cycle in a loop composed of a compressor, a condenser, an expansion valve, and an evaporator, wherein one of the condenser and the evaporator is an outdoor heat exchanger and the other is an indoor heat exchanger; a controller, wherein the controller is configured to: determine a time constant, an air conditioner output capacity calculation equation and a delayed response expression, and determine the output capacity of the air conditioner based on the time constant, the air conditioner output capacity calculation equation and the delayed response expression; and send the output capacity of the air conditioner to a user terminal.

[0008] According to the air conditioner of the embodiment of the present invention, by introducing the concept of time constant, the numerical value of the air conditioner operating capacity can be calculated according to the time constant, the air conditioner output capacity calculation equation and the delayed response expression, and fed back to the user through the user terminal, thereby achieving the effect of detecting the air conditioner operating capacity without adding additional detection devices, reducing the cost of the air conditioner, and the calculation data is simple and the calculation accuracy is high, so that the user can accurately understand the operating status and performance of the air conditioner in real time, which is conducive to improving user satisfaction.

[0009] In some embodiments, when determining the time constant, the controller is specifically configured to perform the following equation:

[0010]

[0011] M=ρV;

[0012] Where T is the time constant, M is the indoor air mass, C is the specific heat of air, A is the indoor room area, K is the heat transfer coefficient, ρ is the indoor air density, and V is the indoor room volume.

[0013] In some embodiments, when determining the output capacity of the air conditioner based on the time constant, the air conditioner output capacity calculation equation and the delayed response expression, the controller is specifically configured to: introduce the time constant into the air conditioner output capacity calculation equation to obtain a first expression containing the time constant; determine the output capacity of the air conditioner based on the first expression and the delayed response expression.

[0014] In some embodiments, the air conditioner further includes a return air temperature sensor and an indoor coil temperature sensor, wherein the return air temperature sensor is used to detect the return air temperature, and the indoor coil temperature sensor is used to detect the instantaneous evaporation temperature of the indoor coil. When determining the air conditioner output capacity calculation equation, the controller is specifically configured to execute the following formula:

[0015] Q=AK(T a -T e );

[0016] Wherein, Q is the output capacity of the air conditioner, A is the area of ​​the indoor room, K is the heat transfer coefficient, T a is the return air temperature, T e is the instantaneous evaporating temperature of the indoor coil.

[0017] In some embodiments, when the time constant is introduced into the air conditioner output capacity calculation equation to obtain a first expression containing the time constant, the controller is specifically configured to execute the following equation:

[0018]

[0019] Wherein, Q is the output capacity of the air conditioner, M is the indoor air quality, C is the air specific heat, T is the time constant, T a is the return air temperature, T e is the instantaneous evaporating temperature of the indoor coil.

[0020] In some embodiments, when determining the output capacity of the air conditioner based on the first expression and the delayed response expression, the controller is specifically configured to: determine the time constant based on the delayed response expression; substitute the time constant into the first expression to obtain the output capacity of the air conditioner.

[0021] In some embodiments, the delayed response expression is:

[0022]

[0023] Among them, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, Gain is the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency of the compressor changes, and T is the time constant.

[0024] In some embodiments, when determining the time constant according to the delay response expression, the controller is specifically configured to perform the following calculation:

[0025]

[0026] Wherein, T is the time constant, Gain is the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency of the compressor changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature.

[0027] In some embodiments, the time constant is substituted into the first expression to obtain the output capacity of the air conditioner. The controller is specifically configured to execute the following equation:

[0028]

[0029] Wherein, Gain is the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency of the compressor changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, M is the indoor air quality, C is the air specific heat, T a is the return air temperature, Te is the instantaneous evaporating temperature of the indoor coil.

[0030] In order to achieve the above-mentioned purpose, an embodiment of the second aspect of the present invention proposes a control method for an air conditioner, which includes the following steps: determining a time constant, an air conditioner output capacity calculation equation and a delayed response expression; determining the output capacity of the air conditioner based on the time constant, the air conditioner output capacity calculation equation and the delayed response expression; and sending the output capacity of the air conditioner to a user terminal.

[0031] According to the control method of the air conditioner in the embodiment of the present invention, by introducing the concept of time constant, the numerical value of the air conditioner operating capacity can be calculated according to the time constant, the air conditioner output capacity calculation equation and the delayed response expression, and the value is fed back to the user through the user terminal, thereby achieving the effect of detecting the air conditioner operating capacity without adding additional detection devices, reducing the cost of the air conditioner, and the calculation data is simple and the calculation accuracy is high, so that the user can accurately understand the operating status and performance of the air conditioner in real time, which is conducive to improving user satisfaction.

[0032] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0034] Figure 1 is a schematic diagram of a refrigeration cycle system of an air conditioner according to an embodiment of the present invention;

[0035] Figure 2 is a schematic structural diagram of a controller according to an embodiment of the present invention;

[0036] Figure 3 is a structural diagram of an air conditioner according to an embodiment of the present invention;

[0037] Figure 4 is a schematic diagram of determining the output capacity of an air conditioner based on a time constant, an air conditioner output capacity calculation equation, and a delayed response expression according to one embodiment of the present invention;

[0038] Figure 5 is a schematic diagram of a flow chart for calculating the output capacity of an air conditioner according to an embodiment of the present invention;

[0039] Figure 6 is a flowchart of a method for controlling an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] like Figure 1 As shown, one of the indoor and outdoor heat exchangers is a condenser and the other is an evaporator. In the present invention, the air conditioner 1 performs a refrigeration cycle of the air conditioner 1 by using a compressor, a condenser, an expansion valve, an evaporator, and a four-way valve. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0045] The compressor compresses the high-temperature, high-pressure refrigerant gas entering through the return pipe and discharges the compressed refrigerant through the exhaust pipe. The discharged refrigerant gas flows into the condenser through the condenser inlet pipe. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0046] 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 1 functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner 1 functions as a cooler in a cooling mode.

[0047] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser and discharged through the condenser outlet pipe into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. Throughout this cycle, the air conditioner 1 can regulate the temperature of the indoor space.

[0048] In the embodiment shown in this application, air conditioner 1 further includes a controller 71. Controller 71 is a device that generates an operation control signal based on an instruction opcode and a timing signal, thereby instructing air conditioner 1 to execute the control instruction. For example, in response to a power-on or power-off instruction received from a user, controller 71 may execute an operation related to the object selected by the power-on or power-off instruction.

[0049] The embodiment of the present application also provides a hardware structure diagram of a controller 71, such as Figure 2 As shown, the controller 71 includes a processor 83 and, optionally, a memory 82 and a communication interface 84 connected to the processor 83. The processor 83, the memory 82 and the communication interface 84 are connected via a bus 81.

[0050] The processor 83 may be a central processing unit (CPU), a general-purpose processor (GP), a network processor (NP), a digital signal processor (DSP), a microprocessor (MCU), a microcontroller (MCU), a programmable logic device (PLD), or any combination thereof. The processor 83 may also be any other device having a processing function, such as a circuit, a device, or a software module. The processor 83 may also include multiple CPUs, and the processor 83 may be a single-core (single CPU) processor 83 or a multi-core (multi CPU) processor 83. The processor 83 herein may refer to one or more devices, circuits, or processing cores for processing data (e.g., computer program instructions).

[0051] The memory 82 can be a read-only memory 82 (ROM) or other types of static storage devices that can store static information and instructions, a random access memory 82 (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory 82 (EEPROM), a compact disc read-only memory (CD ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, and the present embodiment of the application does not impose any restrictions on this. The memory 82 can exist independently or be integrated with the processor 83. Among them, the memory 82 can contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, thereby realizing the control method of the air conditioner 1 provided in the embodiment of the present application.

[0052] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.). The communication interface 84 can be a module, a circuit, a transceiver or any device that can achieve communication.

[0053] The bus 81 may be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81. The bus 81 may be divided into an address bus 81, a data bus 81, a control bus 81, and the like.

[0054] The following combination Figure 3-Figure 6 An air conditioner 1 and a control method thereof according to an embodiment of the present invention are described.

[0055] In some embodiments, as Figure 3 As shown, the air conditioner 1 includes: a refrigerant circulation circuit 10, which allows the refrigerant to undergo a refrigeration cycle in a circuit composed of a compressor, a condenser, an expansion valve, an evaporator and a four-way valve. One of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger.

[0056] In some embodiments, as Figure 3 As shown, the air conditioner 11 also includes: a controller 71, which is configured to: determine the time constant, the air conditioner 1 output capacity calculation equation and the delay response expression, and determine the output capacity of the air conditioner 1 based on the time constant, the air conditioner 1 output capacity calculation equation and the delay response expression; and send the output capacity of the air conditioner 1 to the user terminal.

[0057] Specifically, during the operation of the air conditioner 1, the output capacity of the air conditioner 1 can be determined by determining a time constant, an output capacity calculation equation for the air conditioner 1, and a delayed response expression. The time constant represents the time required for the return air temperature of the air conditioner to reach equilibrium with the target temperature. That is, when the indoor return air temperature differs from the set target temperature, the time required to adjust the output capacity of the air conditioner 1 by adjusting the compressor frequency to adjust the output capacity of the air conditioner 1 so that the return air temperature reaches the set target temperature. The output capacity calculation equation for the air conditioner 1 can be a mathematical model that represents the cooling or heating capacity of the air conditioner 1 under different conditions. The output capacity calculation equation for the air conditioner 1 can be used to evaluate the performance of the air conditioner 1 under different conditions and determine the optimal output setting accordingly. The delayed response expression represents the dynamic process of adjusting the output capacity of the air conditioner 1 by adjusting the compressor frequency to adjust the output capacity of the air conditioner 1 so that the return air temperature reaches the set target temperature. Further, after determining the output capacity of the air conditioner 1, the controller 71 can send the output capacity of the air conditioner 1 to a user terminal, such as but not limited to a smartphone, tablet computer, or smart home system, so that the user can understand the operating status and performance of the air conditioner 1 in real time, thereby enhancing the user experience and improving user satisfaction.

[0058] According to the air conditioner 1 of the embodiment of the present invention, by introducing the concept of time constant, the numerical value of the operating capacity of the air conditioner 1 can be calculated according to the time constant, the calculation equation of the output capacity of the air conditioner 1 and the delayed response expression, and fed back to the user through the user terminal, thereby achieving the effect of detecting the operating capacity of the air conditioner 1 without adding additional detection devices, reducing the cost of the air conditioner 1, and the calculation data is simple and the calculation accuracy is high, so that the user can accurately understand the operating status and performance of the air conditioner 1 in real time, which is conducive to improving user satisfaction.

[0059] In one embodiment of the present invention, when determining the time constant, the controller 71 is specifically configured to execute the following equation:

[0060]

[0061] M=ρV;

[0062] Where T is the time constant, M is the indoor air mass, C is the specific heat of air, A is the indoor room area, K is the heat transfer coefficient, ρ is the indoor air density, and V is the indoor room volume.

[0063] Specifically, according to the principle of non-steady-state heat conduction, when determining the time constant, the specific formula is as shown above, where T is the time constant, which is used to indicate the time required for the return air temperature of the air conditioner to reach equilibrium with the target temperature; M is the indoor air mass. Generally, the larger the value of M, the greater the air mass, and the longer it takes for the return air temperature of the air conditioner to reach equilibrium with the target temperature. M can be calculated by ρV, where ρ is the indoor air density, that is, the air mass per unit volume, and V is the indoor room volume; C is the specific heat of air, that is, the amount of heat required or released when the air temperature changes; A is the area of ​​the indoor room, which is used to determine the range of heat transfer on the surface of the indoor room when the air conditioner exchanges heat with the indoor air; K is the heat transfer coefficient, and AK is used to indicate the heat transfer rate between the air conditioner and the indoor air.

[0064] In one embodiment of the present invention, Figure 4 As shown, when determining the output capacity of the air conditioner 1 based on the time constant, the output capacity calculation equation of the air conditioner 1 and the delayed response expression, the controller 71 is specifically configured to: introduce the time constant into the output capacity calculation equation of the air conditioner 1 to obtain a first expression containing the time constant; determine the output capacity of the air conditioner 1 based on the first expression and the delayed response expression.

[0065] Specifically, when determining the output capacity of air conditioner 1 based on the time constant, the output capacity calculation equation for air conditioner 1, and the delayed response expression, the time constant can be introduced into the output capacity calculation equation for air conditioner 1. That is, the time required for the return air temperature to reach equilibrium with the target temperature is introduced into the original output capacity calculation equation for air conditioner 1, thereby obtaining a modified first expression including the time constant. Furthermore, after obtaining the first expression including the time constant, controller 71 can determine the output capacity of air conditioner 1 under given time constant and delayed response conditions through calculation and analysis based on the first expression and the delayed response expression. It is understood that during the delay period, the output capacity of air conditioner 1 may not reach the ideal level. By comprehensively analyzing the first expression and the delayed response expression, controller 71 can more accurately assess the actual output capacity that air conditioner 1 can provide under a given time delay, ensuring that users can dynamically adjust air conditioner 1 in real time based on the current output capacity of air conditioner 1 to provide the desired cooling or heating effect, thereby improving customer experience and satisfaction.

[0066] In one embodiment of the present invention, the air conditioner 1 further includes a return air temperature sensor and an indoor coil temperature sensor. The return air temperature sensor is used to detect the return air temperature, and the indoor coil temperature sensor is used to detect the instantaneous evaporation temperature of the indoor coil. When determining the calculation equation for the output capacity of the air conditioner 1, the controller 71 is specifically configured to execute the following formula:

[0067] Q=AK(T a -T e );

[0068] Among them, Q is the output capacity of air conditioner 1, A is the indoor room area, K is the heat transfer coefficient, T a is the return air temperature, T e It is the instantaneous evaporation temperature of the indoor coil.

[0069] Specifically, the air conditioner 1 is provided with a return air temperature sensor and an indoor coil temperature sensor, wherein the return air temperature sensor is used to detect the return air temperature of the air conditioner 1, that is, the temperature of the indoor air after being processed by the air conditioner 1 and re-entering the room, which can reflect the current state of the indoor environment, and the indoor coil temperature sensor is used to detect the instantaneous evaporation temperature of the indoor coil, that is, the real-time monitoring value of the evaporation temperature of the indoor coil during the operation of the air conditioner 1. Further, when determining the calculation equation of the output capacity of the air conditioner 1, the specific formula is as shown above, wherein Q is the output capacity of the air conditioner 1, which is used to represent the amount of heat that the air conditioner 1 can transfer per unit time, that is, the cooling or heating capacity; A is the indoor room area, which is used to determine the range of heat transfer on the room surface; K is the heat transfer coefficient; AK is used to represent the heat transfer rate between the air conditioner and the indoor air; T a is the return air temperature, T e is the instantaneous evaporation temperature of the indoor coil, and the difference between the two is used to indicate the heat exchange capability between the air conditioner 1 and the indoor air.

[0070] In one embodiment of the present invention, when the time constant is introduced into the output capacity calculation equation of the air conditioner 1 to obtain a first expression containing the time constant, the controller 71 is specifically configured to execute the following equation:

[0071]

[0072] Among them, Q is the output capacity of air conditioner 1, M is the indoor air quality, C is the air specific heat, T is the time constant, T a is the return air temperature, T e It is the instantaneous evaporation temperature of the indoor coil.

[0073] Specifically, when the time constant is introduced into the calculation equation for the output capacity of the air conditioner 1, the first expression containing the time constant is obtained. The specific formula is as shown above, where Q is the output capacity of the air conditioner 1, which is used to represent the amount of heat that the air conditioner 1 can transfer per unit time, that is, the cooling or heating capacity; M is the indoor air quality. Generally speaking, the larger the value of M, the greater the air quality, and the longer it takes for the indoor temperature to reach the equilibrium point; C is the specific heat of air, that is, the amount of heat required or released when the air temperature changes; T is the time constant, which is used to represent the time required for the return air temperature of the air conditioner to reach equilibrium with the target temperature; T a is the return air temperature, that is, the temperature of the indoor air after being processed by the air conditioner 1 and entering the room again, which can reflect the current state of the indoor environment. e is the instantaneous evaporation temperature of the indoor coil, i.e., the real-time monitoring value of the evaporation temperature of the indoor coil during the operation of the air conditioner 1. It can be understood that after determining the time constant time, the time constant formula can be transformed to obtain After the time constant is introduced into the output capacity calculation equation of the air conditioner 1, the above-mentioned first expression containing the time constant can be obtained. The first expression containing the time constant can still be used to calculate the output capacity of the air conditioner.

[0074] In one embodiment of the present invention, when determining the output capacity of the air conditioner 1 based on the first expression and the delayed response expression, the controller 71 is specifically configured to: determine the time constant based on the delayed response expression; substitute the time constant into the first expression to obtain the output capacity of the air conditioner 1.

[0075] Specifically, when determining the output capacity of the air conditioner 1 according to the first expression and the delayed response expression, the time constant can be determined according to the delayed response expression. Specifically, the delayed response expression is used to represent the dynamic process of adjusting the output capacity of the air conditioner 1 by adjusting the compressor frequency so that the return air temperature reaches the set target temperature. By calculating and analyzing the delayed response expression, the controller 71 can determine the current time constant of the air conditioner 1; further, after determining the time constant, the time constant can be substituted into the first expression to obtain the output capacity of the air conditioner 1 according to the first expression, so as to ensure that the user can dynamically adjust the air conditioner 1 in real time according to the output capacity of the current air conditioner 1 to provide the required cooling or heating effect, thereby improving the customer experience and satisfaction. That is, according to the principle of non-steady-state heat conduction, the embodiment of the present invention introduces a time constant, and the time constant has a calculation relationship with the delayed response and the output capacity. Therefore, the time constant is used as a bridge. After determining the time constant according to the delayed response expression, the time constant is substituted into the first expression to obtain the output capacity of the air conditioner 1.

[0076] In one embodiment of the present invention, the delayed response expression is:

[0077]

[0078] Among them, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, Gain is the final change in the evaporating temperature of the indoor coil when the compressor unit frequency changes, and T is the time constant.

[0079] Specifically, the delayed response expression is as shown above, where T e is the instantaneous evaporation temperature of the indoor coil, that is, the real-time evaporation temperature of the indoor coil during the operation of the air conditioner 1; T ei is the initial coil temperature, i.e., the evaporating temperature of the indoor coil before the compressor frequency is adjusted; Gain is the final change in the evaporating temperature of the indoor coil per unit change in the compressor frequency, which determines the extent of the impact of the compressor frequency adjustment on the evaporating temperature of the indoor coil; T is the time constant, which represents the time required for the air conditioner's return air temperature to reach equilibrium with the target temperature, i.e., the time required for the evaporating temperature of the indoor coil to reach a steady-state value. It can be understood that the delayed response expression represents the dynamic process of adjusting the output capacity of air conditioner 1 by adjusting the compressor frequency to achieve the set target temperature of the return air temperature, i.e., the process by which the indoor coil evaporating temperature gradually approaches the steady-state value after the compressor frequency adjustment.

[0080] In one embodiment of the present invention, when determining the time constant according to the delayed response expression, the controller 71 is specifically configured to execute the following equation:

[0081]

[0082] Where T is the time constant, Gain is the final change in the evaporation temperature of the indoor coil when the compressor unit frequency changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature.

[0083] Specifically, when determining the time constant based on the delay response expression, the delay response expression can be sorted out to obtain the above formula. Specifically, the following transformations can be performed. First, the delay response expression can be transformed into Solve the terms individually, that is Then, taking the logarithm of both sides, we can get Finally, the Taking the inverse of the term, we can get

[0084] In one embodiment of the present invention, the time constant is substituted into the first expression to obtain the output capacity of the air conditioner 1. The controller 71 is specifically configured to execute the following equation:

[0085]

[0086] Where Gain is the final change in the evaporation temperature of the indoor coil when the compressor unit frequency changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, M is the indoor air quality, C is the air specific heat, T a is the return air temperature, T e It is the instantaneous evaporation temperature of the indoor coil.

[0087] Specifically, if Figure 5 As shown, by substituting the time constant into the first expression, the output capacity of the air conditioner 1 can be obtained. The specific formula is shown above, where Gain is the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency of the compressor changes. It can be tested in advance through experiments, that is, adjusting the compressor frequency, recording the change in the evaporation temperature of the indoor coil, and obtaining the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency changes. It can be preset in the controller 71 of the air conditioner 1 before the air conditioner 1 is started; M is the indoor air quality, which is related to the space where the air conditioner 1 is installed. It can be preset in the controller 71 of the air conditioner 1 when the air conditioner 1 is installed; C is the specific heat of air, which is preset in the controller 71 of the air conditioner 1. Further, after the air conditioner 1 is turned on, the initial coil temperature T of the air conditioner 1 can be detected and obtained. ei , and obtain the instant evaporation temperature T of the indoor coil in real time e And the return air temperature T a , and calculate according to the output capacity formula of the air conditioner 1, the output capacity of the air conditioner 1 can be obtained, so that the controller 71 can send the output capacity of the air conditioner 1 to the user terminal, so that the user can understand the operating status and performance of the air conditioner 1 in real time, thereby enhancing the user's usage experience and improving user satisfaction.

[0088] According to the air conditioner 1 of the embodiment of the present invention, by introducing the concept of time constant, the numerical value of the operating capacity of the air conditioner 1 can be calculated according to the time constant, the calculation equation of the output capacity of the air conditioner 1 and the delayed response expression, and fed back to the user through the user terminal, thereby achieving the effect of detecting the operating capacity of the air conditioner 1 without adding additional detection devices, reducing the cost of the air conditioner 1, and the calculation data is simple and the calculation accuracy is high, so that the user can accurately understand the operating status and performance of the air conditioner 1 in real time, which is conducive to improving user satisfaction.

[0089] Reference below Figure 6A method for controlling an air conditioner according to an embodiment of the present invention is described.

[0090] like Figure 6 As shown, the air conditioner control method according to the embodiment of the present invention at least includes steps S1 to S3.

[0091] Step S1, determining the time constant, the air conditioner output capacity calculation equation and the delayed response expression.

[0092] Step S2, determining the output capacity of the air conditioner according to the time constant, the air conditioner output capacity calculation equation and the delayed response expression.

[0093] Step S3: Send the output capacity of the air conditioner to the user terminal.

[0094] In some embodiments, the time constant expression is:

[0095]

[0096] M=ρV;

[0097] Where T is the time constant, M is the indoor air mass, C is the specific heat of air, A is the indoor room area, K is the heat transfer coefficient, ρ is the indoor air density, and V is the indoor room volume.

[0098] In some embodiments, when determining the output capacity of the air conditioner based on the time constant, the air conditioner output capacity calculation equation and the delayed response expression, it specifically includes: introducing the time constant into the air conditioner output capacity calculation equation to obtain a first expression containing the time constant; determining the output capacity of the air conditioner based on the first expression and the delayed response expression.

[0099] In some embodiments, the air conditioner output capacity calculation equation is:

[0100] Q=AK(T a -T e );

[0101] Among them, Q is the output capacity of the air conditioner, A is the indoor room area, K is the heat transfer coefficient, T a is the return air temperature, T e It is the instantaneous evaporation temperature of the indoor coil.

[0102] In some embodiments, the time constant is introduced into the air conditioner output capacity calculation equation, and the first expression containing the time constant is obtained as follows:

[0103]

[0104] Among them, Q is the output capacity of the air conditioner, M is the indoor air quality, C is the air specific heat, T is the time constant, T ais the return air temperature, T e It is the instantaneous evaporation temperature of the indoor coil.

[0105] In some embodiments, when determining the output capacity of the air conditioner according to the first expression and the delayed response expression, it specifically includes: determining a time constant according to the delayed response expression; substituting the time constant into the first expression to obtain the output capacity of the air conditioner.

[0106] In some embodiments, the delayed response expression is:

[0107]

[0108] Among them, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, Gain is the final change in the evaporating temperature of the indoor coil when the compressor unit frequency changes, and T is the time constant.

[0109] In some embodiments, when determining the time constant according to the delay response expression, the specific formula is:

[0110]

[0111] Where T is the time constant, Gain is the final change in the evaporation temperature of the indoor coil when the compressor unit frequency changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature.

[0112] In some embodiments, substituting the time constant into the first expression, the expression for the output capacity of the air conditioner is obtained as follows:

[0113]

[0114] Where Gain is the final change in the evaporation temperature of the indoor coil when the compressor unit frequency changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, M is the indoor air quality, C is the air specific heat, T a is the return air temperature, T e It is the instantaneous evaporation temperature of the indoor coil.

[0115] It should be noted that when controlling the air conditioner, its specific implementation method is similar to the specific implementation method of the air conditioner in any of the above-mentioned embodiments of the present invention. Therefore, for a detailed exemplary description of the control process of the air conditioner, please refer to the aforementioned relevant description part about the air conditioner. In order to reduce redundancy, it will not be repeated here.

[0116] According to the control method of the air conditioner in the embodiment of the present invention, by introducing the concept of time constant, the numerical value of the air conditioner operating capacity can be calculated according to the time constant, the air conditioner output capacity calculation equation and the delayed response expression, and the value is fed back to the user through the user terminal, thereby achieving the effect of detecting the air conditioner operating capacity without adding additional detection devices, reducing the cost of the air conditioner, and the calculation data is simple and the calculation accuracy is high, so that the user can accurately understand the operating status and performance of the air conditioner in real time, which is conducive to improving user satisfaction.

[0117] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0118] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that: include: A refrigerant circulation loop, wherein the refrigerant performs a refrigeration cycle in a loop consisting of a compressor, a condenser, an expansion valve, an evaporator, and a four-way valve, wherein one of the condenser and the evaporator is an outdoor heat exchanger and the other is an indoor heat exchanger; a controller configured to determine a time constant, an air conditioner output capacity calculation equation, and a delayed response expression, and determine the output capacity of the air conditioner based on the time constant, the air conditioner output capacity calculation equation, and the delayed response expression; The output capacity of the air conditioner is sent to a user terminal.

2. The air conditioner according to claim 1, characterized in that When determining the time constant, the controller is specifically configured to perform the following calculation: M=ρV; Where T is the time constant, M is the indoor air mass, C is the specific heat of air, A is the indoor room area, K is the heat transfer coefficient, ρ is the indoor air density, and V is the indoor room volume.

3. The air conditioner according to claim 2, characterized in that When determining the output capacity of the air conditioner according to the time constant, the air conditioner output capacity calculation equation and the delayed response expression, the controller is specifically configured as follows: Introducing the time constant into the air conditioner output capacity calculation equation to obtain a first expression containing the time constant; The output capacity of the air conditioner is determined based on the first expression and the delayed response expression.

4. The air conditioner according to claim 3, characterized in that The air conditioner further includes a return air temperature sensor and an indoor coil temperature sensor. The return air temperature sensor is used to detect the return air temperature, and the indoor coil temperature sensor is used to detect the instantaneous evaporation temperature of the indoor coil. When determining the air conditioner output capacity calculation equation, the controller is specifically configured to execute the following formula: Q=AK(T e -T e ); Wherein, Q is the output capacity of the air conditioner, A is the area of ​​the indoor room, K is the heat transfer coefficient, T a is the return air temperature, T e is the instantaneous evaporating temperature of the indoor coil.

5. The air conditioner according to claim 4, characterized in that When the time constant is introduced into the air conditioner output capacity calculation equation to obtain a first expression containing the time constant, the controller is specifically configured to execute the following equation: Wherein, Q is the output capacity of the air conditioner, M is the indoor air quality, C is the air specific heat, T is the time constant, T a is the return air temperature, T e is the instantaneous evaporating temperature of the indoor coil.

6. The air conditioner according to claim 5, characterized in that When determining the output capacity of the air conditioner according to the first expression and the delayed response expression, the controller is specifically configured as follows: determining the time constant according to the delayed response expression; Substituting the time constant into the first expression, the output capacity of the air conditioner is obtained.

7. The air conditioner according to claim 5, characterized in that The delayed response expression is: Among them, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, Gain is the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency of the compressor changes, and T is the time constant.

8. The air conditioner according to claim 7, characterized in that When determining the time constant according to the delay response expression, the controller is specifically configured to execute the following formula: Wherein, T is the time constant, Gain is the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency of the compressor changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature.

9. The air conditioner according to claim 8, characterized in that Substituting the time constant into the first expression to obtain the output capacity of the air conditioner, the controller is specifically configured to execute the following equation: Wherein, Gain is the final change amplitude of the evaporation temperature of the indoor coil when the unit frequency of the compressor changes, T e is the instantaneous evaporation temperature of the indoor coil, T ei is the initial coil temperature, M is the indoor air quality, C is the air specific heat, T a is the return air temperature, T e is the instantaneous evaporating temperature of the indoor coil.

10. A method for controlling an air conditioner, characterized in that: For the air conditioner according to any one of claims 1 to 9, the method comprises the following steps: Determine the time constant, air conditioner output capacity calculation equation and delayed response expression; Determining the output capacity of the air conditioner according to the time constant, the air conditioner output capacity calculation equation and the delayed response expression; The output capacity of the air conditioner is sent to a user terminal.

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