Air conditioner and control method therefor

Abstract

Provided are an air conditioner and a control method therefor. The air conditioner comprises an outdoor unit, an indoor unit and a controller. The outdoor unit comprises a compressor. The controller is configured to: in response to a received power-on instruction, detect a current operation mode of the air conditioner; acquire at least one of a current outdoor environment temperature, an actual outlet water temperature, a set outlet water temperature, an inlet water temperature and a rated capacity of the indoor unit; calculate an initial capacity requirement of the compressor; calculate a target frequency of the compressor; and determine a corresponding power-on control instruction from a preset control library, and, according to the matched power-on control instruction, control the frequency of the compressor to be adjusted to the target frequency.

Description

Air conditioner and control method thereof

[0001] This application claims priority to Chinese patent application No. 202311599378.3 filed on November 27, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to an air conditioner and a control method thereof. Background Art

[0003] Air conditioners are widely used to regulate indoor temperature and consist of an indoor unit and an outdoor unit. The indoor unit is located indoors and is used to exchange heat with the indoor air. The outdoor unit includes a compressor, which compresses low-temperature or low-pressure refrigerant into high-temperature, high-pressure refrigerant and outputs it to a heat exchanger for heat exchange between the refrigerant and the air.

[0004] Summary of the Invention

[0005] In one aspect, an air conditioner is provided. The air conditioner includes an outdoor unit and an indoor unit. The indoor unit includes a first heat exchanger. The outdoor unit includes a second heat exchanger, an expansion valve, and a compressor. The compressor, the first heat exchanger, the expansion valve, the second heat exchanger, and the compressor are sequentially connected to form a refrigerant circuit. One of the first heat exchanger and the second heat exchanger is a condenser, and the other is an evaporator. At least a portion of the circulation pipeline is disposed through the condenser, and the circulation pipeline is configured to exchange heat with the condenser to heat the medium within the circulation pipeline via the condenser. The controller is connected to the compressor and is configured to: detect the current operating mode of the air conditioner in response to a received power-on instruction; obtain at least one of the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and the rated capacity of the indoor unit, and calculate the initial capacity requirement of the compressor based on the current operating mode of the air conditioner, the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and at least one of the rated capacity of the indoor unit; calculate the target frequency of the compressor based on the initial capacity requirement of the compressor; determine the corresponding startup control instruction in a preset control library based on the target frequency of the compressor, and control the frequency of the compressor to be adjusted to the target frequency based on the matched startup control instruction.

[0006] On the other hand, a method for controlling an air conditioner is provided. The air conditioner includes an outdoor unit and an indoor unit. The indoor unit includes a first heat exchanger. The outdoor unit includes a second heat exchanger, an expansion valve, and a compressor. The compressor, the first heat exchanger, the expansion valve, the second heat exchanger, and the compressor are connected in sequence to form a refrigerant circuit. One of the first heat exchanger and the second heat exchanger is a condenser, and the other is an evaporator. At least a portion of the circulation pipeline is provided through the condenser, and the circulation pipeline is configured to perform heat exchange with the condenser so as to heat the medium in the circulation pipeline through the condenser. The controller is connected to the compressor. The method includes: detecting the current operating mode of the air conditioner in response to a received power-on instruction; obtaining at least one of the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and the rated capacity of the indoor unit, and calculating the initial capacity requirement of the compressor based on the current operating mode of the air conditioner, the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and at least one of the rated capacity of the indoor unit; calculating the target frequency of the compressor based on the initial capacity requirement of the compressor; determining a corresponding startup control instruction in a preset control library based on the target frequency of the compressor, and controlling the frequency of the compressor to adjust to the target frequency based on the matched startup control instruction. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG1A is a structural diagram of an air conditioner according to some embodiments;

[0008] FIG1B is a schematic diagram of an air conditioner according to some embodiments;

[0009] FIG1C is a block diagram of an air conditioner according to some embodiments;

[0010] FIG2 is a schematic diagram of a refrigerant circuit according to some embodiments;

[0011] FIG3A is a schematic diagram of a refrigerant circuit and a circulation pipeline according to some embodiments;

[0012] FIG3B is a schematic diagram of a circulation circuit according to some embodiments;

[0013] FIG4 is another block diagram of an air conditioner according to some embodiments;

[0014] FIG5 is a flow chart of steps performed by a controller according to some embodiments;

[0015] FIG6 is another flow chart of steps performed by a controller according to some embodiments;

[0016] FIG7 is another flow chart of steps performed by a controller according to some embodiments;

[0017] FIG8 is another flow chart of steps performed by a controller according to some embodiments;

[0018] FIG9A is another flow chart of steps performed by a controller according to some embodiments;

[0019] FIG9B is another flow chart of steps performed by a controller according to some embodiments;

[0020] FIG9C is another flow chart of steps performed by a controller according to some embodiments;

[0021] FIG9D is another flow chart of steps performed by a controller according to some embodiments;

[0022] FIG9E is another flow chart of steps performed by a controller according to some embodiments;

[0023] FIG. 10 is another flow chart illustrating steps performed by a controller according to some embodiments. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe some embodiments of the present disclosure in conjunction with the accompanying drawings. However, the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0025] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0026] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0027] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0028] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0029] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0030] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0031] Typically, when the air conditioner is operating in cooling mode and heating mode, the controller of the air conditioner determines the frequency of the compressor based on the temperature difference between the set indoor ambient temperature and the actual indoor ambient temperature. For example, when the temperature difference becomes larger, the controller controls the frequency of the compressor to increase, the speed of the compressor to increase, and the compressor is loaded, thereby increasing the output power of the compressor; for another example, when the temperature difference becomes smaller, the controller controls the frequency of the compressor to decrease, the speed of the compressor to decrease, and the compressor is unloaded, thereby reducing the output power of the compressor. Alternatively, the controller of the air conditioner controls the loading and unloading of the compressor based on the actual outlet water temperature, and does not control the frequency of the compressor based on the set outlet water temperature. In this way, the frequency control of the compressor is difficult to meet actual needs. The actual outlet water temperature is the temperature of the refrigerant (refrigerating medium) (such as water) flowing out of the outlet of the heat exchanger. The set outlet water temperature is set by the user or is the initial set outlet water temperature saved when the air conditioner leaves the factory, and can be saved in the controller.

[0032] To address the aforementioned issues, some embodiments of the present disclosure provide an air conditioner 1000 and a control method thereof. By linking compressor frequency control with the outdoor ambient temperature, the actual outlet water temperature, and the set outlet water temperature, while also taking into account the rate of change of the set outlet water temperature and the actual outlet water temperature, the compressor frequency control effect is more consistent with actual conditions.

[0033] 1A and 1B , an air conditioner 1000 includes an indoor unit 100. The indoor unit 100 is installed indoors and performs heat exchange with indoor air.

[0034] As shown in FIG1B , the indoor unit 100 includes a first heat exchanger 101 (indoor heat exchanger). The first heat exchanger 101 is configured to exchange heat between the indoor air and the refrigerant transmitted through the first heat exchanger 101. For example, in the first mode (cooling mode) of the air conditioner 1000, the first heat exchanger 101 operates as an evaporator, causing the refrigerant to absorb heat from the indoor air through the first heat exchanger 101 and evaporate. In the second mode (heating mode) of the air conditioner 1000, the first heat exchanger 101 operates as a condenser, causing the refrigerant to dissipate heat to the indoor air through the first heat exchanger 101 and condense. A coil is provided within the first heat exchanger 101, which is connected to the refrigerant circuit. The refrigerant flows through the coil of the first heat exchanger 101 to exchange heat with the indoor air.

[0035] As shown in FIG1B , the indoor unit 100 includes an indoor fan 102. The indoor fan 102 is configured to draw indoor air into the indoor unit 100 through the indoor air inlet of the indoor unit 100 and to deliver the indoor air, after heat exchange with the first heat exchanger 101, through the indoor air outlet of the indoor unit 100. The indoor fan 102 provides power for the flow of indoor air.

[0036] In some embodiments, as shown in FIG1A , the air conditioner 1000 further includes an outdoor unit 200. The indoor unit 100 and the outdoor unit 200 are connected by a pipeline to transmit refrigerant.

[0037] It should be noted that, since the indoor unit 100 in FIG. 1A is located indoors and the outdoor unit 200 is located outdoors, the outdoor unit 200 is indicated by a dotted line in FIG. 1A .

[0038] 1B , the outdoor unit 200 includes a compressor 201. The compressor 201 is configured to compress the refrigerant so that the low-pressure refrigerant is compressed to form a high-pressure refrigerant.

[0039] As shown in FIG1B , the outdoor unit 200 further includes a second heat exchanger 202 (outdoor heat exchanger). The second heat exchanger 202 is configured to perform heat exchange between outdoor air and the refrigerant transmitted in the second heat exchanger 202. For example, in the first mode of the air conditioner 1000, the second heat exchanger 202 operates as a condenser, so that the refrigerant compressed by the compressor 201 dissipates heat to the outdoor air through the second heat exchanger 202 and condenses; in the second mode of the air conditioner 1000, the second heat exchanger 202 operates as an evaporator, so that the decompressed refrigerant absorbs heat from the outdoor air through the second heat exchanger 202 and evaporates. A coil is provided in the second heat exchanger 202, which is connected to the refrigerant circuit. The refrigerant flows in the coil of the second heat exchanger 202 to exchange heat with the outdoor air.

[0040] As shown in Figure 1B , the outdoor unit 200 further includes an outdoor fan 203. The outdoor fan 203 is configured to draw outdoor air into the outdoor unit 200 through the second air inlet of the outdoor unit 200 and to deliver the outdoor air, after heat exchange with the second heat exchanger 202, through the second air outlet. The outdoor fan 203 provides power to move the outdoor air, causing the outdoor air to flow through the second heat exchanger 202 and exchange heat with the refrigerant in the second heat exchanger 202.

[0041] 1B , the outdoor unit 200 further includes a four-way valve 205. The four-way valve 205 is connected to the refrigerant circuit and is configured to switch the flow direction of the refrigerant in the refrigerant circuit so that the air conditioner 1000 operates in the first mode or the second mode.

[0042] As shown in Figure 1B, the outdoor unit 200 also includes an expansion valve 204. The expansion valve 204 is connected between the second heat exchanger 202 and the first heat exchanger 101. The opening of the expansion valve 204 regulates the pressure of the refrigerant flowing through the second heat exchanger 202 and the indoor unit 100, thereby adjusting the refrigerant flow between the second heat exchanger 202 and the first heat exchanger 101. The flow rate and pressure of the refrigerant flowing between the second heat exchanger 202 and the first heat exchanger 101 affect the heat exchange performance of the second heat exchanger 202 and the indoor unit 100. The opening of the expansion valve 204 is adjustable to control the flow rate and pressure of the refrigerant flowing through the expansion valve 204. For example, the expansion valve 204 expands the liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant.

[0043] It should be noted that some embodiments of the present disclosure are described by taking the expansion valve 204 as being disposed in the outdoor unit 200 as an example. Of course, in some embodiments, the expansion valve 204 may also be disposed in the indoor unit 100.

[0044] In some embodiments, as shown in FIG1C , the air conditioner 1000 further includes a refrigerant circuit 300. By circulating the refrigerant in the refrigerant circuit 300, a vapor compression refrigeration cycle (Vapor Compression Refrigeration System) can be formed. Pipes are connected to the indoor unit 100 and the outdoor unit 200 to form the refrigerant circuit 300 for circulating the refrigerant.

[0045] In some embodiments, as shown in FIG2 , a compressor 201, a first heat exchanger 101, an expansion valve 204, a second heat exchanger 202, and a compressor 201 connected in sequence form a refrigerant circuit 300. The refrigerant circulates in the refrigerant circuit 300 and exchanges heat with the air through the second heat exchanger 202 and the first heat exchanger 101, respectively, to achieve the first mode or the second mode of the air conditioner 1000.

[0046] In some embodiments, as shown in FIG3A , the air conditioner 1000 further includes an evaporator 500. The air conditioner 1000 further includes a condenser 600. The evaporator 500 may be one of the first heat exchanger 101 and the second heat exchanger 202, and the condenser 600 may be the other of the first heat exchanger 101 and the second heat exchanger 202. The compressor 201, the condenser 600, the expansion valve 204, and the evaporator 500, which are sequentially connected by pipelines, form a refrigerant circuit 300.

[0047] In some embodiments, as shown in FIG3A , the air conditioner 1000 further includes a circulation line 700 (hot water circulation). At least a portion of the circulation line 700 passes through the condenser 600. The circulation line 700 is configured to exchange heat with the condenser 600, thereby heating the coolant (medium) within the circulation line 700 through the condenser 600. For example, the coolant is water.

[0048] As shown in FIG3A , condenser 600 includes a water inlet 601. Condenser 600 also includes a water outlet 602. Circulation line 700 is connected to one end of condenser 600 via water inlet 601 and to the other end of condenser 600 via water outlet 602. Thus, the brine in circulation line 700 flows into condenser 600 via water inlet 601 and out of condenser 600 via water outlet 602.

[0049] In some embodiments, as shown in FIG3B , air conditioner 1000 further includes a container 800 . Container 800 is configured to hold domestic water. For example, container 800 may include a water tank. The brine flowing out of condenser 600 through outlet 602 undergoes heat exchange with the domestic water within container 800 to heat the domestic water, thereby producing hot water. The cooled brine then flows back to condenser 600 via circulation line 700 , forming a brine circulation system.

[0050] In some embodiments, as shown in FIG3B and FIG4, the air conditioner 1000 further includes a first temperature sensor 701. The first temperature sensor 701 is provided at the water inlet 601 and is configured to detect the inlet water temperature T Wi . Water inlet temperature T Wi is the temperature of the coolant flowing from the circulation pipeline 700 into the water inlet 601.

[0051] In some embodiments, as shown in FIG3A and FIG3B , the air conditioner 1000 further includes a second temperature sensor 702. The second temperature sensor 702 is provided at the water outlet 602 and is configured to detect the actual outlet water temperature T wo . Actual water outlet temperature T wo The temperature of the coolant flowing out of the water outlet 602 from the circulation pipeline 700.

[0052] In some embodiments, as shown in FIG3A , the air conditioner 1000 further includes a third temperature sensor 703. The third temperature sensor 703 is provided in the outdoor unit 200 and is configured to detect the current outdoor ambient temperature T R .

[0053] In some embodiments of the present disclosure, the air conditioner 1000 not only has an air conditioning function but also has a hot water production function. Since the air conditioner 1000 can provide hot water via the circulation line 700, the operating mode of the air conditioner 1000 includes a third mode (hot water production mode). When the air conditioner 1000 operates in the third mode, the air conditioner 1000 produces hot water.

[0054] It should be noted that the third mode of the air conditioner 1000 actually operates in the second mode of the air conditioner 1000. The third mode can achieve precise control of hot water temperature and energy consumption, and concentrate heat and output it to the circulation pipeline 700.

[0055] It should be noted that when the air conditioner 1000 operates in the first mode, the first heat exchanger 101 serves as the evaporator 500, and the second heat exchanger 202 serves as the condenser 600. When the air conditioner 1000 operates in the second mode, the first heat exchanger 101 serves as the condenser 600, and the second heat exchanger 202 serves as the evaporator 500. When the air conditioner 1000 operates in the third mode, the first heat exchanger 101 serves as the condenser 600, and the second heat exchanger 202 serves as the evaporator 500. The brine exchanges heat with the refrigerant in the condenser 600 before exchanging heat with the domestic water in the container 800.

[0056] It should be noted that the air conditioner 1000 can be understood as a combined heat pump system including hot water and air conditioning. When the air conditioner 1000 operates in the third mode, it can be understood as an air-to-energy heat pump. For example, when the air conditioner 1000 operates in the third mode, the compressor 201 compresses the refrigerant and outputs the refrigerant to the condenser 600. The brine in the circulation line 700 exchanges heat with the refrigerant in the condenser 600 to heat the brine in the circulation line 700. Afterwards, the brine in the circulation line 700 exchanges heat with domestic water to heat the domestic water. In this process, the air-to-energy heat pump itself does not generate heat energy, but relies on electrical energy to operate. Under the action of the air-energy heat pump, the compressor 201 completes the pressure and temperature increase of the gaseous refrigerant. After the gaseous refrigerant enters the condenser 600, it releases heat, is cooled and converted into liquid refrigerant. After the liquid refrigerant flows to the evaporator 500, the liquid refrigerant quickly absorbs heat and evaporates, and is converted into gaseous refrigerant. The air around the evaporator 500 will continuously transfer low-temperature heat. The air-energy heat pump compresses and cools the air and releases it again to dissipate heat. The air-energy heat pump can be considered as the power system corresponding to the third mode. The power consumption of the air-energy heat pump is much lower than the power consumption of directly controlling the water temperature and room temperature through electricity. Therefore, the air-energy heat pump can save energy.

[0057] 1C and 4 , the air conditioner 1000 further includes a controller 400. The controller 400 is connected to the compressor 201, the first temperature sensor 701, the second temperature sensor 702, and the third temperature sensor 703, respectively.

[0058] The controller 400 includes a processor. The processor may include a central processing unit (CPU), a microprocessor (Microprocessor), or an application-specific integrated circuit (ASIC), and may be configured to perform the corresponding operations described in the controller 400 when the processor executes a program stored in a non-transitory computer-readable medium coupled to the controller 400.

[0059] In some embodiments, as shown in FIG. 5 , the controller 400 is configured to perform steps 111 to 114 .

[0060] In step 111 , in response to the received power-on command, the current operating mode of the air conditioner 1000 is detected.

[0061] In step 112, the current outdoor ambient temperature T is obtained. R , actual water outlet temperature T wo , set the outlet water temperature T ws , Rated capacity CAP of indoor unit 100 rate And the water inlet temperature T Wi At least one of .

[0062] It should be noted that the rated capacity CAP of the indoor unit 100 is rate It includes the rated heating capacity or the rated cooling capacity of the indoor unit 100.

[0063] In step 113 , the target frequency of the compressor 201 is calculated according to the initial capacity requirement of the compressor 201 .

[0064] It should be noted that the initial capacity requirement of the compressor 201 is at least based on the rated capacity CAP of the indoor unit 100. rate The determined parameters and the initial capacity requirement of the compressor 201 affect the frequency of the compressor 201 .

[0065] In step 114 , a corresponding start-up control instruction is determined in a preset control library according to the target frequency of the compressor 201 , and the frequency of the compressor 201 is controlled to be adjusted to the target frequency according to the matched start-up control instruction.

[0066] It should be noted that the startup control instruction may include a proportional control strategy, an integral control strategy, a derivative control strategy, or a proportional-integral-derivative control (PID) strategy.

[0067] It should be noted that between step 112 and step 113, the controller 400 is further configured to obtain multiple parameters (such as the current outdoor environment temperature T R , actual water outlet temperature T wo , set the outlet water temperature T ws , Rated capacity CAP of indoor unit 100 rate And the water inlet temperature T Wi ) to calculate the initial capacity requirement of compressor 201.

[0068] For example, as shown in FIG6 , the controller 400 is further configured to execute steps 211 to 217 .

[0069] In step 211, it is determined whether a power-on command of the air conditioner 1000 is received. If "yes", step 212 is executed; if "no", step 211 is continued.

[0070] When the air conditioner 1000 is turned off, the detection of the power-on instruction of the air conditioner 1000 continues until the air conditioner 1000 is turned on.

[0071] In step 212, the current operating mode of the air conditioner 1000 is detected.

[0072] It should be noted that the operating modes of the air conditioner 1000 include the first mode, the second mode and the third mode.

[0073] In step 213, the current outdoor ambient temperature T is obtained. R , actual water outlet temperature T wo , set the outlet water temperature T ws , Rated capacity CAP of indoor unit 100 rate And the water inlet temperature T Wi At least one of .

[0074] In step 214 , the initial capacity requirement of the compressor 201 is calculated.

[0075] According to the current outdoor ambient temperature T R , actual water outlet temperature T wo , set the outlet water temperature T ws, Rated capacity CAP of indoor unit 100 rate And the water inlet temperature T Wi At least one of them corresponds to calculating the initial capacity requirement of the compressor 201.

[0076] In step 215 , the target frequency of the compressor 201 is calculated according to the initial capacity requirement.

[0077] In step 216 , a corresponding start control instruction is matched in a preset control library according to the target frequency.

[0078] Different startup control instructions are determined according to the range of the target frequency to correspondingly start the compressor 201 , thereby increasing the startup stability of the compressor 201 .

[0079] In step 217 , the frequency of the compressor 201 is controlled to be adjusted to the target frequency according to the matched startup control instruction.

[0080] It should be noted that, for step 214, according to the current outdoor ambient temperature T R , actual water outlet temperature T wo , set the outlet water temperature T ws , Rated capacity CAP of indoor unit 100 rate And the water inlet temperature T Wi At least one of the above is used to calculate the initial capacity requirement of compressor 201. The process of calculating the initial capacity requirement of compressor 201 varies depending on the operating mode. FIG7 illustrates the process of calculating the initial capacity requirement of compressor 201 when air conditioner 1000 is operating in the first mode or the second mode. FIG7 illustrates the process of calculating the initial capacity requirement of compressor 201 when air conditioner 1000 is operating in the first mode or the second mode.

[0081] In some embodiments, as shown in FIG. 7 , the controller 400 is further configured to execute steps 311 to 319 .

[0082] In step 311 , the current operation mode of the air conditioner 1000 is detected.

[0083] In step 312 , it is determined whether the current operating mode of the air conditioner 1000 is the first mode or the second mode. If yes, step 313 is executed; if no, step 319 is executed.

[0084] In step 313, the current outdoor ambient temperature T is obtained. R , actual water outlet temperature T wo , set the outlet water temperature T ws , water inlet temperature T Wi and a first sub-rated capacity of the indoor unit 100 .

[0085] It should be noted that the rated capacity CAP of the indoor unit 100 is rate The first sub-rated capacity includes the rated cooling capacity CAPC of the indoor unit 100. rate Or the first sub-rated heating capacity CAPH of the indoor unit 100 rate1 . First mode and rated cooling capacity CAPC rate Correspondingly, the second mode and the first sub-rated heating capacity CAPH rate1 correspond.

[0086] In step 314, according to the inlet water temperature T Wi Determine the inlet water temperature T in the first parameter library Wi The corresponding first correction coefficient K TW .

[0087] It should be noted that different water inlet temperatures T Wi Corresponding to different first correction coefficients K TW (Water temperature correction coefficient). Different operating modes correspond to different first parameter libraries. For example, when the air conditioner 1000 operates in the first mode, according to Table 1 and the inlet water temperature T Wi Match the first correction coefficient K in the first parameter library TW When the air conditioner 1000 operates in the second mode, according to Table 2 and the water inlet temperature T Wi Match the first correction coefficient K in the first parameter library TW .

[0088] Table 1 The first parameter library corresponding to the first mode

[0089] Table 2 The first parameter library corresponding to the second mode

[0090] In step 315, the actual outlet water temperature T is calculated. Wo and set water outlet temperature T Ws The water temperature difference ΔT W .

[0091] In step 316, according to the water temperature difference ΔT W Determine the water temperature difference ΔT in the second parameter library W The corresponding second correction coefficient K △T .

[0092] It should be noted that different water temperature differences ΔT W Corresponding to different second correction coefficients K △T (Temperature difference correction coefficient). Different operating modes correspond to different second parameter libraries.

[0093] In the first operating mode of the air conditioner 1000, according to Table 3 and the water temperature difference ΔT W Determine the second correction coefficient K △T The first shutdown temperature difference T OFFSETC1 When the air conditioner 1000 is in the first mode, the outlet water temperature T is set. ws For example, when the air conditioner 1000 is running in the first mode, the outlet water temperature is set to 7°C and the shutdown temperature is set to 6°C, then the first shutdown temperature difference T OFFSETC1 The difference between the set water outlet temperature and the temperature required for shutdown is 1°C.

[0094] When the air conditioner 1000 operates in the second mode, according to Table 4 and the water temperature difference ΔT W Determine the second correction coefficient K △T , the second shutdown temperature difference T OFFSETC2 When the air conditioner 1000 is in the second mode, the outlet water temperature T is set. ws For example, when the air conditioner 1000 is running in the second mode, the outlet water temperature is set to 55°C and the shutdown temperature is 56°C, then the second shutdown temperature difference T OFFSETC2 The difference between the set water outlet temperature and the temperature required for shutdown is 1°C.

[0095] It should be noted that when the air conditioner 1000 completes cooling, heating or preparing hot water, the air conditioner 1000 can be shut down.

[0096] Table 3 The second parameter library corresponding to the first mode

[0097] Table 4 The second parameter library corresponding to the second mode

[0098] In step 317, according to the current outdoor ambient temperature T R Determine the current outdoor ambient temperature T in the third parameter library R The corresponding third correction coefficient K TR .

[0099] It should be noted that different current outdoor ambient temperatures T R Corresponding to different third correction coefficients K TR (Temperature difference correction coefficient). Different operating modes correspond to different third parameter libraries. When the air conditioner 1000 operates in the first mode, according to Table 5 and the current outdoor ambient temperature T R Determine the third correction coefficient K TR In the second operation mode of the air conditioner 1000, according to Table 6 and the current outdoor ambient temperature T R Determine the third correction coefficient K TR .

[0100] Table 5 The third parameter library corresponding to the first mode

[0101] Table 6 The third parameter library in the second mode

[0102] In step 318 , the initial capacity requirement CAP of the compressor 201 is calculated.

[0103] Calculate the rated capacity CAP of the indoor unit 100 rate , the first correction coefficient K TW , the second correction coefficient K △T And the third correction coefficient K TR The product of the initial capacity requirement CAP of the compressor 201 (CAP = CAP rate ×K △T ×K TR ×K TW ).

[0104] Taking the second type of air conditioner with a heating capacity of 10000W as an example, when the ambient temperature is 30℃ and the water temperature difference is ΔT W When the temperature is ≤-7°C and the water inlet temperature is >23°C, in the first operation mode of the indoor unit 100, the initial capacity requirement of the compressor 201 is CAPC=10000*0.85*1*1.2*0.5W=5100 W. Here, 0.85 is the empirical coefficient corresponding to the cooling mode of the air conditioner 1000.

[0105] Taking the second type of air conditioner with a heating capacity of 10000W as an example, when the ambient temperature is 30℃ and the water temperature difference is ΔT W ≤-7℃, water inlet temperature T Wi When the temperature is greater than 45°C, in the first operation mode of the indoor unit 100, the initial capacity requirement of the compressor 201 is CAPH=10000*1*1.2*0.5W=6000W.

[0106] In step 319 , other control flows are executed.

[0107] In the case where the air conditioner 1000 does not execute the first mode or the second mode, the air conditioner 1000 may execute the third mode, and thus, the controller 400 executes other control processes.

[0108] FIG8 corresponds to the calculation process of the initial capacity requirement of the compressor 201 when the air conditioner 1000 operates in the third mode.

[0109] In some embodiments, as shown in FIG. 8 , the controller 400 is further configured to execute steps 411 to 419 .

[0110] In step 411 , the current operation mode of the air conditioner 1000 is detected.

[0111] In step 412 , it is determined whether the current operating mode of the air conditioner 1000 is the third mode. If yes, step 413 is executed; if no, step 419 is executed.

[0112] In step 413, the current outdoor ambient temperature T is obtained. R , actual water outlet temperature T wo , set the outlet water temperature T ws And the rated capacity CAP of the indoor unit 100 rate .

[0113] It should be noted that the rated capacity CAP of the indoor unit 100 is rate Includes second sub-rated capacity CAPH rate2 The third mode and the second sub-rated heating capacity CAPH rate2 Corresponding to the second sub-rated heating capacity CAPH rate2 With the first rated heating capacity CAPH rate1 different 。

[0114] In step 414, the heating capacity CAPH of the second sub-quota is calculated. rate2 Determine the second sub-rated heating capacity CAPH in the fourth parameter library rate2 The corresponding fourth correction coefficient K Tk (Hot water correction factor).

[0115] It should be noted that different second sub-rated heating capacity CAPH rate2 Corresponding to different fourth correction coefficients K Tk In the third operating mode of the air conditioner 1000, according to Table 7 and the second sub-rated heating capacity CAPH rate2 Determine the fourth correction coefficient K Tk .

[0116] Table 7 The fourth parameter library corresponding to the third mode

[0117] In step 415, the actual outlet water temperature T is calculated. Wo and set water outlet temperature T Ws The water temperature difference ΔT W .

[0118] In step 416, according to the water temperature difference ΔT W Determine the water temperature difference ΔT in the second parameter library W The corresponding second correction coefficient K △T .

[0119] When the air conditioner 1000 operates in the third mode, according to Table 8 and the water temperature difference ΔT W Different second correction coefficients are determined in a second parameter library.

[0120] Table 8 The second parameter library corresponding to the third mode

[0121] In step 417, according to the current outdoor ambient temperature T R Determine the current outdoor ambient temperature T in the third parameter library R The corresponding third correction coefficient K TR .

[0122] In the third operating mode of the air conditioner 1000, according to Table 9 and the current outdoor ambient temperature T R Determine the third correction coefficient K TR .

[0123] Table 9 The third parameter library corresponding to the third mode

[0124] In step 418 , the initial capacity requirement CAP of the compressor 201 is calculated.

[0125] Calculate the rated capacity CAP of the indoor unit 100 rate , the fourth correction coefficient K Tk , the second correction coefficient K △T And the third correction coefficient K TR The product of the initial capacity requirement of the compressor 201 (CAP = CAP rate ×K △T ×K TR ×K Tk ).

[0126] By setting different initial capacity requirement calculation steps for the compressor 201 for different operating modes, the air conditioner 1000 can be operated in different modes according to the outdoor ambient temperature T R , actual water outlet temperature T Wo and set water outlet temperature T Ws The water temperature difference ΔT W , the first correction coefficient K TW , water inlet temperature T Wi As well as parameters such as the rated capacity of the indoor unit 100, the initial capacity requirement of the compressor 201 is accurately calculated.

[0127] In step 419 , other control flows are executed.

[0128] In the case that the air conditioner 1000 does not execute the third mode, the air conditioner 1000 may execute the first mode or the second mode, and thus, the controller 400 executes other control processes.

[0129] In some embodiments, the target frequency Fre_aim of the compressor 201 is the sum of the product of the target parameter Capacity and the mode coefficient Kao and the compensation coefficient Kbo (Fre_aim=Capacity×Kao+Kbo).

[0130] The target parameter Capacity is the rated capacity CAP of the indoor unit 100 rate Ratio to 100 (Capacity = CAP / 100).

[0131] Kao is the mode coefficient corresponding to the operating mode. For example, KaoC is the mode coefficient corresponding to the first mode. The KaoC of the first air conditioner is 0.5, the KaoC of the second air conditioner is 0.4, and the KaoC of the third air conditioner is 0.3. KaoH is the mode coefficient corresponding to the second mode. The KaoH of the first air conditioner is 0.5, the KaoH of the second air conditioner is 0.4, and the KaoH of the third air conditioner is 0.3. KaoDWH is the mode coefficient corresponding to the third mode. The KaoDWH of the first air conditioner is 0.5, the KaoDWH of the second air conditioner is 0.4, and the KaoDWH of the third air conditioner is 0.3.

[0132] Kbo represents the compensation coefficient corresponding to the operating mode. For example, KboC represents the compensation coefficient corresponding to the first mode. The KboC for the first air conditioner is 15, the KboC for the second air conditioner is 14, and the KboC for the third air conditioner is 13. KboH represents the compensation coefficient corresponding to the second mode. The KboC for the first air conditioner is 15, the KboC for the second air conditioner is 14, and the KboC for the third air conditioner is 13. KboDHW represents the compensation coefficient corresponding to the third mode. The KboDHW for the first air conditioner is 15, the KboDHW for the second air conditioner is 14, and the KboDHW for the third air conditioner is 13. By matching different coefficients to different modes, the target frequency of compressor 201 is accurately calculated.

[0133] Taking the second type of air conditioner with a heating capacity of 10,000 W as an example, when the second type of air conditioner operates in the second mode, the target frequency of compressor 201 is Fre_aim = 0.4 * 6000 / 100 + 14 = 38 Hz. It should be noted that the heating capacity is estimated here using the air conditioner 1000 just after it is turned on as an example. For example, when the air conditioner 1000 is just turned on, the heating capacity of the air conditioner 1000 is 6,000 W.

[0134] In some embodiments, the control functions of the controller 400 can be divided into the wired controller, the indoor unit 100 and the outdoor unit 200. The wired controller is configured to receive a power-on command, detect an operating mode and pre-store a set water outlet temperature.

[0135] In some embodiments, as shown in FIG. 9A , the controller 400 is further configured to execute steps 521 to 526 .

[0136] In step 521 , the power-on command, operation mode, and set outlet water temperature are sent to the indoor unit 100 .

[0137] For example, the wired controller sends a power-on command, an operating mode, and a set water outlet temperature to the indoor unit 100 .

[0138] After the control section in the indoor unit 100 calculates the initial capacity requirement of the compressor 201 , it calculates the target frequency of the compressor 201 .

[0139] In step 522 , the target frequency of the compressor 201 is matched to a proportional-integral-derivative control (PID) strategy of the compressor 201 .

[0140] For example, after the control part of the indoor unit 100 calculates the target frequency, the proportional integral derivative control rule of the compressor 201 is determined, and the control part of the indoor unit 100 matches the target frequency of the compressor 201 to the proportional integral derivative control strategy of the compressor 201.

[0141] In step 523 , the target frequency of the compressor 201 and the proportional-integral-derivative control strategy of the compressor 201 are sent to the outdoor unit 200 , respectively.

[0142] In step 524 , the operating frequency of the compressor 201 is adjusted to the target frequency.

[0143] For example, after the outdoor unit 200 obtains the target frequency of the compressor 201, the control unit in the outdoor unit 200 adjusts the load or unload of the compressor 201. During the frequency adjustment process, to enhance the safety of the compressor 201 operation, the compressor 201 needs to be operated for a period of time at different specific frequencies according to the operating instructions of the compressor 201. These specific frequencies of the compressor 201 are also called protection platforms.

[0144] In step 525, it is determined whether the actual outlet water temperature reaches the set outlet water temperature. If "yes", step 526 is executed. If "no", the process returns to step 522.

[0145] It should be noted that after adjusting the frequency of the compressor 201, the controller 400 needs to determine whether the actual outlet water temperature reaches the set outlet water temperature. When the actual outlet water temperature is less than or equal to the set outlet water temperature, the target frequency of the compressor 201 and the proportional-integral-differential control rule of the compressor 201 are determined again, and the frequency of the compressor 201 is continuously regulated until the set outlet water temperature is reached.

[0146] In step 526 , the adjustment of the frequency of the compressor 201 is ended.

[0147] In some embodiments, during the process of adjusting the frequency of the compressor 201 to the target frequency, the controller 400 needs to first adjust the frequency of the compressor 201 to an intermediate value between the current operating frequency and the target frequency and maintain it for a predetermined time, and then adjust the frequency of the compressor 201 to the target frequency.

[0148] For example, as shown in FIG. 9B , the controller 400 is further configured to execute steps 511 to 513 .

[0149] In step 511 , it is determined whether the first target frequency of the compressor 201 is within a first preset interval.

[0150] For example, the minimum value of the first preset interval is greater than 40 Hz and less than or equal to 50 Hz. This facilitates frequency regulation of compressor 201 and increases the operational stability of compressor 201. For example, the minimum value of the first preset interval is 40 Hz, 42 Hz, 45 Hz, 48 Hz, or 50 Hz. For example, the first preset interval is between 45 Hz and 50 Hz.

[0151] In step 512 , the operating frequency of the compressor 201 is controlled to be adjusted to a first preset frequency at a first rate, and the first preset frequency is maintained for a first duration.

[0152] It should be noted that the first preset frequency is between the current operating frequency of the compressor 201 and the target frequency.

[0153] For example, if the target frequency is greater than the current operating frequency of the compressor 201 , the compressor 201 needs to increase the frequency, and the first preset frequency is greater than the current operating frequency of the compressor 201 and less than the first target frequency.

[0154] For another example, if the target frequency is lower than the current operating frequency of the compressor 201 , the compressor 201 needs to reduce the frequency, and the first preset frequency is higher than the first target frequency and lower than the current operating frequency of the compressor 201 .

[0155] Taking the frequency increase of the compressor 201 as an example, for example, the current operating frequency of the compressor 201 is 46 Hz, the first preset frequency is 48 Hz, the target frequency is 49 Hz, the first rate is 1 Hz / s, and the first duration is 60 s.

[0156] In step 513 , the operating frequency of the compressor 201 is controlled to be adjusted to the first target frequency at a second rate.

[0157] It should be noted that the second rate is less than the first rate. For example, the second rate is 0.5 Hz / s.

[0158] When the first target frequency of the compressor 201 is in the first preset range, the compressor 201 is controlled to adjust the operating frequency to 48 Hz at a first rate, and after maintaining it for 60 seconds, the compressor 201 is controlled to adjust the operating frequency to the first target frequency at a second rate.

[0159] For example, during the frequency increase process of compressor 201, the first preset frequency is greater than the current operating frequency of compressor 201 and less than the target frequency. If the operating frequency of compressor 201 is less than the first preset frequency (e.g., 48 Hz), the frequency increase rate of compressor 201 is 1 Hz / s. If the operating frequency of compressor 201 is greater than or equal to the first preset frequency, the frequency increase rate of compressor 201 is 0.5 Hz / s.

[0160] For another example, during the frequency reduction process of compressor 201, the first preset frequency is greater than the target frequency and less than the current operating frequency of compressor 201. When the operating frequency of compressor 201 is greater than or equal to the first preset frequency (e.g., 48 Hz), the frequency reduction rate of compressor 201 is 1 Hz / s. When the operating frequency of compressor 201 is less than the first preset frequency, the frequency reduction rate of compressor 201 is 0.5 Hz / s.

[0161] The above is explained using the example of the first preset frequency being 48 Hz, the first preset interval being an interval with a minimum value exceeding 40 Hz (e.g., 45 Hz to 50 Hz), and the first duration being 60 s. Of course, the first preset frequency, the first preset interval, and the first duration can also be set according to actual needs.

[0162] In some embodiments of the present disclosure, the frequency of the compressor 201 is first adjusted to a first preset frequency at a first rate and maintained in stable operation for a first period of time. After the compressor 201 operates stably, the operating frequency of the compressor 201 is adjusted to the target frequency at a second rate to increase the stability of the operation of the compressor 201.

[0163] In some embodiments, as shown in FIG. 9C , the controller 400 is further configured to execute steps 611 to 613 .

[0164] In step 611 , it is determined whether the second target frequency of the compressor 201 is within a second preset interval.

[0165] It should be noted that the minimum value of the second preset interval is greater than the maximum value of the first preset interval. For example, the minimum value of the second preset interval is greater than 50 Hz and less than or equal to 70 Hz. This facilitates frequency regulation of the compressor 201 and increases the operational stability of the compressor 201. For example, the minimum value of the second preset interval is 55 Hz, 56 Hz, 60 Hz, 65 Hz, or 70 Hz. This allows the second preset interval to be separated from the first preset interval. For example, the second preset interval is 55 Hz to 60 Hz.

[0166] In step 612 , the operating frequency of the compressor 201 is controlled to be adjusted to a second preset frequency at a third rate, and the second preset frequency is maintained for a second duration.

[0167] It should be noted that the second preset frequency is between the current operating frequency of the compressor 201 and the second target frequency.

[0168] For example, if the target frequency is greater than the current operating frequency of the compressor 201 , the compressor 201 needs to increase the frequency, and the second preset frequency is greater than the current operating frequency of the compressor 201 and less than the second target frequency.

[0169] For another example, if the target frequency is lower than the current operating frequency of the compressor 201 , the compressor 201 needs to reduce the frequency, and the second preset frequency is higher than the second target frequency and lower than the current operating frequency of the compressor 201 .

[0170] Taking the frequency increase of the compressor 201 as an example, for example, the current operating frequency of the compressor 201 is 55 Hz, the second preset frequency is 58 Hz, the second target frequency is 59 Hz, the third rate is 1 Hz / s, and the second duration is 80 s.

[0171] In step 613 , the operating frequency of the compressor 201 is controlled to be adjusted to the second target frequency at a fourth rate.

[0172] It should be noted that the fourth rate is less than the third rate. For example, the fourth rate is 0.5 Hz / s.

[0173] When the second target frequency of the compressor 201 is in the second preset range, the compressor 201 is controlled to adjust the operating frequency to 58 Hz at a third rate, and after maintaining it for 80 seconds, the compressor 201 is controlled to adjust the operating frequency to the second target frequency at a fourth rate.

[0174] For example, during the frequency increase process of compressor 201, if the second preset frequency is greater than the current operating frequency of compressor 201 and less than the target frequency, and the operating frequency of compressor 201 is less than the second preset frequency (e.g., 58 Hz), the frequency increase rate of compressor 201 is 1 Hz / s. If the operating frequency of compressor 201 is greater than or equal to the second preset frequency, the frequency increase rate of compressor 201 is 0.5 Hz / s.

[0175] For another example, during the frequency reduction process of compressor 201, if the second preset frequency is greater than the target frequency and less than the current operating frequency of compressor 201, and the operating frequency of compressor 201 is greater than or equal to the second preset frequency (e.g., 58 Hz), the frequency reduction rate of compressor 201 is 1 Hz / s. If the operating frequency of compressor 201 is less than the second preset frequency, the frequency reduction rate of compressor 201 is 0.5 Hz / s.

[0176] The above is explained using the second preset frequency of 58 Hz, the second preset interval of the interval with a minimum value exceeding 50 Hz (e.g., 55 Hz to 60 Hz), and the second duration of 80 s as an example. Of course, the second preset frequency, the second preset interval, and the second duration can also be set according to actual needs.

[0177] In some embodiments of the present disclosure, the frequency of the compressor 201 is first adjusted to a second preset frequency at a third rate and maintained in stable operation for a second period of time. The second preset interval is separated from the first preset interval, and the second period of time is greater than the first period of time. After the compressor 201 operates stably, the operating frequency of the compressor 201 is adjusted to the target frequency at a fourth rate. In this way, the stability of the operation of the compressor 201 can be increased when the operating frequency of the compressor 201 is high.

[0178] In some embodiments, as shown in FIG. 9D , the controller 400 is further configured to execute steps 711 to 713 .

[0179] In step 711 , it is determined whether the third target frequency of the compressor 201 is within a third preset interval.

[0180] It should be noted that the minimum value of the third preset interval is greater than the maximum value of the second preset interval. For example, the minimum value of the third preset interval is greater than 60 Hz and less than or equal to 90 Hz. This facilitates frequency regulation of the compressor 201 and increases the operational stability of the compressor 201. For example, the minimum value of the second preset interval is 70 Hz, 75 Hz, 80 Hz, 85 Hz, or 90 Hz. This allows the third preset interval to be separated from the second preset interval. For example, the second preset interval is 70 Hz to 80 Hz.

[0181] In step 712 , the operating frequency of the compressor 201 is controlled to be adjusted to a third preset frequency at a fifth rate, and the third preset frequency is maintained for a third duration.

[0182] It should be noted that the third preset frequency is between the current operating frequency of the compressor 201 and the third target frequency.

[0183] For example, if the target frequency is greater than the current operating frequency of the compressor 201 , the compressor 201 needs to increase the frequency, and the third preset frequency is greater than the current operating frequency of the compressor 201 and less than the third target frequency.

[0184] For another example, if the target frequency is lower than the current operating frequency of the compressor 201 , the compressor 201 needs to reduce the frequency, and the third preset frequency is higher than the third target frequency and lower than the current operating frequency of the compressor 201 .

[0185] Taking the frequency increase of the compressor 201 as an example, for example, the current operating frequency of the compressor 201 is 76 Hz, the third preset frequency is 78 Hz, the second target frequency is 79 Hz, the fifth rate is 1 Hz / s, and the third duration is 90 s.

[0186] In step 713 , the operating frequency of the compressor 201 is controlled to be adjusted to the third target frequency at a sixth rate.

[0187] It should be noted that the sixth rate is smaller than the fifth rate. For example, the fourth rate is 0.5 Hz / s.

[0188] When the first target frequency of the compressor 201 is in the third preset range, the compressor 201 is controlled to adjust the operating frequency to 78 Hz at the fifth rate, and after maintaining it for 90 seconds, the compressor 201 is controlled to adjust the operating frequency to the third target frequency at the sixth rate.

[0189] For example, during the frequency increase process of compressor 201, the first preset frequency is greater than the current operating frequency of compressor 201 and less than the target frequency. If the operating frequency of compressor 201 is less than the third preset frequency (e.g., 78 Hz), the frequency increase rate of compressor 201 is 1 Hz / s. If the operating frequency of compressor 201 is greater than or equal to the third preset frequency, the frequency increase rate of compressor 201 is 0.5 Hz / s.

[0190] For another example, during the frequency reduction process of compressor 201, the first preset frequency is greater than the target frequency and less than the current operating frequency of compressor 201. When the operating frequency of compressor 201 is greater than or equal to the third preset frequency (e.g., 78 Hz), the frequency reduction rate of compressor 201 is 1 Hz / s. When the operating frequency of compressor 201 is less than the third preset frequency, the frequency reduction rate of compressor 201 is 0.5 Hz / s.

[0191] The above is explained using the example of the third preset frequency being 78 Hz, the third preset interval being an interval with a minimum value exceeding 60 Hz (e.g., 70 Hz to 80 Hz), and the third duration being 90 s. Of course, the third preset frequency, the third preset interval, and the third duration can also be set according to actual needs.

[0192] In some embodiments of the present disclosure, the frequency of the compressor 201 is first adjusted to a third preset frequency at a fifth rate and maintained in stable operation for a third period of time, the third preset interval is separated from the second preset interval, and the third period of time is greater than the second period of time. After the compressor 201 operates stably, the operating frequency of the compressor 201 is adjusted to the target frequency at a sixth rate. In this way, the stability of the operation of the compressor 201 can be increased when the operating frequency of the compressor 201 is higher.

[0193] In some embodiments, as shown in FIG. 9E , the controller 400 is further configured to execute steps 811 to 813 .

[0194] In step 811, the current outdoor environment T is determined. R The current operating frequency of the compressor 201 is outside the Kth frequency interval and is within the Kth temperature interval.

[0195] It should be noted that the Kth temperature interval is set corresponding to the Kth frequency interval.

[0196] In step 812 , the frequency value closest to the current operating frequency of the compressor 201 in the Kth frequency interval is used as the target frequency of the compressor 201 .

[0197] In step 813, the current outdoor ambient temperature T is re-detected. R .

[0198] It should be noted that the minimum frequency value of compressor 201 is F_LOW, and the maximum frequency value is F_HIGH. The minimum and maximum frequencies of compressor 201, F_LOW, and F_HIGH, are factory-set parameters. During the frequency increase and decrease of compressor 201, the frequency of compressor 201 is between the minimum and maximum frequencies, F_LOW and F_HIGH.

[0199] In some embodiments, in different operating modes of the air conditioner 1000, different outdoor ambient temperature intervals correspond to different frequency intervals to protect the compressor 201. For example, M temperature intervals correspond to M frequency intervals.

[0200] When the current outdoor ambient temperature is within the Kth temperature interval, the frequency of the compressor 201 is controlled in the frequency interval corresponding to the Kth temperature interval (eg, the Kth frequency interval). K=1, 2, ..., M, where M is the number of temperature intervals set in the operation mode.

[0201] If the current operating frequency of the compressor 201 is outside the Kth frequency interval, the value with the smallest difference from the current operating frequency of the compressor 201 within the Kth frequency interval is used as the target frequency of the compressor 201. The frequency value closest to the current operating frequency of the compressor 201 within the Kth frequency interval is used as the operating frequency of the compressor 201, and the current outdoor ambient temperature T is re-detected. R After adjusting the frequency of the compressor 201, re-detect the current outdoor ambient temperature T R , and judge the outdoor ambient temperature T R The temperature range.

[0202] It should be noted that different operating modes correspond to different frequency ranges.

[0203] By configuring different frequency ranges for the compressor 201 in different temperature ranges and adjusting the frequency of the compressor 201 according to the set operating frequency ranges, the operation of the compressor 201 is protected.

[0204] In some embodiments, as shown in FIG. 10 , the controller 400 is further configured to execute steps 1001 to 1008 .

[0205] In step 1001 , the operating frequency of the compressor 201 is controlled to be adjusted to a target frequency.

[0206] In step 1002, the current water temperature difference ΔT is calculated. W (n).

[0207] For example, the controller 400 calculates the actual outlet water temperature T wo and set water outlet temperature T ws Current water temperature difference ΔT W (n)(ΔT W (n) = T wo (n)-T ws (n)).

[0208] In step 1003, according to the current water temperature difference ΔT W (n) Determine the difference ΔT from the current water temperature in the adjustment cycle library W (n) The corresponding adjustment period T s .

[0209] For example, the controller 400 controls the water temperature according to the current water temperature difference ΔT W(n) Match the adjustment period T in the adjustment period library corresponding to the operation mode s .

[0210] It should be noted that different operation modes are configured with different adjustment cycle libraries, and the adjustment cycle library includes the current water temperature difference ΔT W (n) and adjustment period T s The corresponding relationship.

[0211] Table 10 Adjustment cycle library

[0212] For example, according to Table 10, match the current water temperature difference ΔT W (n) The corresponding adjustment period T s , and adjust the compressor 201.

[0213] In step 1004, the current rate of change v(n) is calculated.

[0214] The current water temperature difference ΔT W (n) Difference ΔT from the previous current water temperature W The difference between (n-1) is used as the current rate of change v(n)(v(n)=ΔT W (n)-ΔT W (n-1)).

[0215] In step 1005, according to the current water temperature difference ΔT W (n), the current rate of change v(n) is determined in the amplitude adjustment library and the current water temperature difference ΔT W (n), the frequency change amplitude ΔF corresponding to the current change rate v(n).

[0216] According to the current water temperature difference ΔT W (n) and the current change rate v(n) match the corresponding frequency change amplitude ΔF in the amplitude adjustment library corresponding to the operating mode.

[0217] It should be noted that different operation modes are configured with different amplitude adjustment libraries ΔF, and each amplitude adjustment library includes each current water temperature difference ΔT W (n), the corresponding relationship between the current change rate v(n) and the frequency change amplitude ΔF.

[0218] Table 11 Amplitude adjustment library corresponding to the first mode

[0219] When the air conditioner 1000 operates in the first mode, the frequency change amplitude ΔF is matched according to Table 11. WWhen (n) is a value between two temperature points, a linear interpolation calculation is performed between the two temperature points to determine the frequency change amplitude ΔF. The initial previous current water temperature difference is 0.

[0220] Table 12 Amplitude adjustment library corresponding to the second mode

[0221] When the air conditioner 1000 operates in the second mode, the frequency change amplitude ΔF is matched according to Table 12. W When (n) is a value between two temperature points, a linear interpolation calculation is performed between the two temperature points to determine the frequency change amplitude ΔF. The initial previous current water temperature difference is 0.

[0222] Table 13 Amplitude adjustment library corresponding to the third mode

[0223] When the air conditioner 1000 operates in the second mode, the frequency change amplitude ΔF is matched according to Table 13. W When (n) is a value between two temperature points, a linear interpolation calculation is performed between the two temperature points to determine the frequency change amplitude ΔF. The initial previous current water temperature difference is 0.

[0224] In step 1006 , the operating time of the compressor 201 at the target frequency is calculated.

[0225] For example, the outdoor unit 200 further includes a timer configured to detect the operating time of the compressor 201 at the target frequency. The controller 400 determines the operating time of the compressor 201 at the target frequency by acquiring data from the timer.

[0226] In step 1007 , it is determined whether the running time T is greater than or equal to the adjustment period Ts. If yes, step 1008 is executed; if no, the process returns to step 1006 .

[0227] In step 1008 , the target frequency is updated with the frequency change amplitude ΔF, and the process returns to step 1001 .

[0228] It should be noted that the updated target frequency f(n) is the sum of the target frequency before the change and the frequency change amplitude ΔF (f(n)=f(n-1)+ΔF, f(n-1) is the target frequency before the change). Recalculate the current water temperature difference ΔT W (n), adjustment period Ts and frequency variation amplitude ΔF.

[0229] After the compressor 201 runs at the target frequency, the compressor frequency change value ΔF sent by the indoor unit 100 is received. The updated target frequency f(n) is the sum of the target frequency before the change and the frequency change amplitude ΔF. The frequency adjustment cycle is based on the adjustment cycle corresponding to the updated target frequency f(n), and the target frequency of the compressor 201 is continuously controlled until the current water temperature difference ΔT is finally calculated. W (n) and the current change rate v(n) are respectively 0, at this time, the outlet water temperature reaches the set outlet water temperature, and maintains stability and the output frequency change amplitude is 0, completing the adjustment of the frequency of the compressor 201.

[0230] It should be noted that by continuously performing proportional-integral-derivative control on the compressor 201 , the operational stability of the compressor 201 can be maintained.

[0231] It should be noted that the sequence numbers of the steps in some embodiments of the present disclosure are only for the purpose of facilitating the description of some embodiments of the present disclosure and should not be construed as limiting the order of the steps. The order of execution of the steps can be determined based on actual needs and is not limited to the order of the steps in some embodiments of the present disclosure. Steps may also be deleted as needed.

[0232] Some embodiments of the present disclosure further provide a method for controlling an air conditioner having a structure similar to that of the air conditioner 1000 , for example, the air conditioner includes an indoor unit 100 , an outdoor unit 200 , a refrigerant circuit 300 , a controller 400 , and a circulation pipeline 700 .

[0233] In some embodiments, the method includes: detecting the current operating mode of the air conditioner in response to a received power-on command; obtaining at least one of the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and the rated capacity of the indoor unit, and calculating the initial capacity requirement of the compressor based on the current operating mode of the air conditioner, the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and at least one of the rated capacity of the indoor unit; calculating the target frequency of the compressor based on the initial capacity requirement of the compressor; determining a corresponding start-up control instruction in a preset control library based on the target frequency of the compressor, and controlling the frequency of the compressor to adjust to the target frequency based on the determined start-up control instruction.

[0234] In some embodiments, the condenser includes a water inlet and a water outlet, the circulation pipeline is connected to the water inlet and the water outlet respectively, and the air conditioner also includes a first temperature sensor, which is arranged at the water inlet and is configured to detect the inlet water temperature; the operating mode includes a first mode and a second mode; when the air conditioner operates in the first mode, the first heat exchanger is the evaporator, and the second heat exchanger is the condenser; when the air conditioner operates in the second mode, the first heat exchanger is the condenser, and the second heat exchanger is the evaporator; the rated capacity of the indoor unit includes a first sub-rated capacity, and the first sub-rated capacity includes the rated cooling capacity of the indoor unit or the first sub-rated heating capacity of the indoor unit; the first mode corresponds to the rated cooling capacity; the second mode corresponds to the first sub-rated heating capacity.

[0235] In some embodiments, the obtaining of at least one of the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature, and the rated capacity of the indoor unit, and calculating the initial capacity requirement of the compressor according to the current operating mode of the air conditioner, the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature, and at least one of the rated capacity of the indoor unit include: obtaining the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature, and the first sub-rated capacity when the air conditioner operates in a target mode; the target mode includes the first mode or the second mode; and according to the The first correction coefficient corresponding to the inlet water temperature is determined in the first parameter library; the water temperature difference between the actual outlet water temperature and the set outlet water temperature is calculated; the second correction coefficient corresponding to the water temperature difference is determined in the second parameter library according to the water temperature difference; the third correction coefficient corresponding to the current outdoor ambient temperature is determined in the third parameter library according to the current outdoor ambient temperature; the initial capacity requirement of the compressor is determined according to the first sub-rated capacity of the indoor unit, the first correction coefficient, the second correction coefficient and the third correction coefficient; the first parameter library, the second parameter library and the third parameter library corresponding to different operating modes are different.

[0236] In some embodiments, the operating mode further includes a third mode; the rated capacity of the indoor unit includes a second sub-rated heating capacity; and the second sub-rated heating capacity corresponds to the third mode.

[0237] In some embodiments, the obtaining of at least one of the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature, and the rated capacity of the indoor unit, and calculating the initial capacity requirement of the compressor according to the current operating mode of the air conditioner, the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature, and at least one of the rated capacity of the indoor unit, comprises: when the air conditioner operates in the third mode, obtaining the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature, and the second sub-rated heating capacity; and calculating the initial capacity requirement of the compressor according to the second sub-rated heating capacity of the indoor unit; and calculating the initial capacity requirement of the compressor according to the second sub-rated heating capacity of the indoor unit. The rated heating capacity is determined in the fourth parameter library by a fourth correction coefficient corresponding to the second rated heating capacity of the indoor unit; the water temperature difference between the actual outlet water temperature and the set outlet water temperature is calculated; the corresponding fifth correction coefficient is determined in the fifth parameter library according to the water temperature difference; the corresponding sixth correction coefficient is determined in the sixth parameter library according to the current outdoor ambient temperature; the initial capacity requirement of the compressor is determined according to the second sub-rated heating capacity, the fourth correction coefficient, the fifth correction coefficient and the sixth correction coefficient; the fourth parameter library, the fifth parameter library and the sixth parameter library corresponding to different operating modes are different.

[0238] In some embodiments, calculating the target frequency of the compressor based on the initial capacity requirement of the compressor includes: determining the target frequency of the compressor based on the rated capacity of the indoor unit corresponding to the operating mode, the mode parameters corresponding to the operating mode, and the compensation coefficient corresponding to the operating mode.

[0239] In some embodiments, matching a corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to operate to the target frequency according to the matched startup control instruction includes: when the first target frequency of the compressor is within a first preset interval, controlling the operating frequency of the compressor to adjust to a first preset frequency at a first rate; and after the compressor operates at the first preset frequency for a first period of time, controlling the operating frequency of the compressor to adjust to the first target frequency at a second rate, wherein the second rate is less than the first rate.

[0240] In some embodiments, matching a corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to operate to the target frequency according to the matched startup control instruction includes: controlling the operating frequency of the compressor to adjust to the second preset frequency at a third rate when the second target frequency of the compressor is within a second preset interval; and after the compressor operates at the second preset frequency for a second period of time, controlling the operating frequency of the compressor to adjust to the second target frequency at a fourth rate. The fourth rate is less than the third rate, and a minimum value of the second preset interval is greater than a maximum value of the first preset interval.

[0241] In some embodiments, matching the corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to operate to the target frequency according to the matched startup control instruction also includes: when the third target frequency of the compressor is within a third preset interval, controlling the compressor to increase the operating frequency to a third preset frequency at a fifth rate; after the compressor operates at the third preset frequency for a third period of time, controlling the compressor to adjust the operating frequency to the third target frequency at a sixth rate; the maximum value of the second preset interval is less than the minimum value of the third preset interval.

[0242] In some embodiments, matching the corresponding start-up control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to operate to the target frequency according to the matched start-up control instruction also includes: determining that the current outdoor environment is in the Kth temperature interval and the current operating frequency of the compressor is outside the Kth frequency interval; taking the frequency value in the Kth frequency interval closest to the current operating frequency of the compressor as the target frequency of the compressor; re-detecting the current outdoor environment temperature; the Kth temperature interval corresponds to the Kth frequency interval, K=1,2,…,M, M is the number of temperature intervals or the number of frequency intervals set in the operating mode.

[0243] In some embodiments, matching a corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to operate to the target frequency according to the matched startup control instruction further includes: controlling the compressor operating frequency to adjust to the target frequency; calculating the current water temperature difference between the actual outlet water temperature and the set outlet water temperature; determining an adjustment period corresponding to the current water temperature difference in an adjustment period library according to the current water temperature difference; calculating the difference between the current water temperature difference and the previous current water temperature difference as the current rate of change; determining a frequency change amplitude corresponding to the current water temperature difference and the current rate of change in an amplitude adjustment library according to the current water temperature difference and the current rate of change; after the compressor operates at the target frequency to the adjustment period, updating the target frequency according to the frequency change amplitude, and recalculating the current water temperature difference, the adjustment period, and the frequency change amplitude. The previous current water temperature difference during initial heating is 0.

[0244] In some embodiments, the method further includes: sending the power-on instruction, the operating mode, and the set outlet water temperature to the indoor unit; determining the target frequency of the compressor and the proportional-integral-differential control rule of the compressor; sending the target frequency of the compressor and the proportional-integral-differential control rule of the compressor to the outdoor unit, respectively; adjusting the operating frequency of the compressor to the target frequency; if the actual outlet water temperature is lower than the set outlet water temperature, determining the target frequency of the compressor and the proportional-integral-differential control rule of the compressor again; if the actual outlet water temperature is greater than or equal to the set outlet water temperature, ending the adjustment of the frequency of the compressor.

[0245] It should be noted that the control method of the air conditioner provided in some embodiments of the present disclosure is the same as all the process steps executed by the controller 400 in the air conditioner 1000 provided in the above embodiment. The working principles and beneficial effects of the two correspond to each other, so they will not be repeated here.

[0246] It should be noted that any one of the technical solutions disclosed in the present disclosure can solve one or more of the above-mentioned technical problems and achieve certain purposes to a certain extent; multiple technical disclosures can also be combined into an overall solution to solve one or more of the above-mentioned technical problems and achieve certain invention purposes; some of the technical disclosures can also be selected to be combined into an overall solution, while adopting related technologies and deteriorated solutions, but the deterioration trend can be compensated by the means disclosed in this technology, and one or more of the above-mentioned technical problems can be solved to a certain extent as a whole and achieve certain invention purposes; each technical disclosure combined into a complete technical solution constitutes an organic and inseparable overall solution, which solves technical problems as a whole and achieves certain invention purposes.

[0247] Any technical disclosure in this disclosure, as well as the recombination of multiple technical disclosures, can form a complete technical solution and can solve one or more of the above-mentioned technical problems and achieve the purpose of the invention. They all belong to the content of this disclosure and are the content that is directly and unambiguously determined based on the content of this disclosure.

[0248] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

1. An air conditioner, comprising: Indoor unit, including: a first heat exchanger; Outdoor unit, including: A second heat exchanger; expansion valve; and A compressor, wherein the compressor, the first heat exchanger, the expansion valve, the second heat exchanger and the compressor are connected in sequence to form a refrigerant circuit; wherein one of the first heat exchanger and the second heat exchanger is a condenser and the other is an evaporator; a circulation pipeline, at least a portion of which passes through the condenser, and the circulation pipeline is configured to perform heat exchange with the condenser so as to heat a medium in the circulation pipeline through the condenser; and A controller is connected to the compressor and is configured to: In response to the received power-on command, detecting a current operating mode of the air conditioner; Acquire at least one of a current outdoor ambient temperature, an actual water outlet temperature, a set water outlet temperature, a water inlet temperature, and a rated capacity of the indoor unit, and calculate an initial capacity requirement of the compressor according to a current operation mode of the air conditioner, the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature, and at least one of the rated capacity of the indoor unit; calculating a target frequency of the compressor according to an initial capacity requirement of the compressor; A corresponding start-up control instruction is determined in a preset control library according to the target frequency of the compressor, and the frequency of the compressor is controlled to be adjusted to the target frequency according to the determined start-up control instruction.

2. The air conditioner according to claim 1, wherein: The condenser includes a water inlet and a water outlet, the circulation pipeline is connected to the water inlet and the water outlet respectively, the air conditioner also includes a first temperature sensor, the first temperature sensor is arranged at the water inlet, and is configured to detect the inlet water temperature; the operation mode includes a first mode and a second mode; when the air conditioner operates in the first mode, the first heat exchanger is the evaporator, and the second heat exchanger is the condenser; when the air conditioner operates in the second mode, the first heat exchanger is the condenser, and the second heat exchanger is the evaporator; the rated capacity of the indoor unit includes a first sub-rated capacity, and the first sub-rated capacity includes a rated cooling capacity of the indoor unit or a first sub-rated heating capacity of the indoor unit; the first mode corresponds to the rated cooling capacity; the second mode corresponds to the first sub-rated heating capacity; The controller is also configured to: In the case where the air conditioner is running in a target mode, obtaining the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature and the first sub-rated capacity; the target mode includes the first mode or the second mode; Determine a first correction coefficient corresponding to the inlet water temperature in a first parameter library according to the inlet water temperature; Calculating the water temperature difference between the actual water outlet temperature and the set water outlet temperature; Determining a second correction coefficient corresponding to the water temperature difference in a second parameter library according to the water temperature difference; Determining a third correction coefficient corresponding to the current outdoor ambient temperature in a third parameter library according to the current outdoor ambient temperature; determining an initial capacity requirement of the compressor according to the first sub-rated capacity of the indoor unit, the first correction coefficient, the second correction coefficient, and the third correction coefficient; Among them, the first parameter library, the second parameter library and the third parameter library corresponding to different operating modes are different.

3. The air conditioner according to claim 1 or 2, wherein: The operation mode further includes a third mode; the rated capacity of the indoor unit includes a second sub-rated heating capacity; the second sub-rated heating capacity corresponds to the third mode; and the controller is further configured as: When the air conditioner operates in the third mode, obtaining the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature and the second sub-rated heating capacity; determining a fourth correction coefficient corresponding to the second rated heating capacity of the indoor unit in a fourth parameter library according to the second rated heating capacity of the indoor unit; Calculating the water temperature difference between the actual water outlet temperature and the set water outlet temperature; Determining a corresponding fifth correction coefficient in a fifth parameter library according to the water temperature difference; Determining a corresponding sixth correction coefficient in a sixth parameter library according to the current outdoor ambient temperature; determining an initial capacity requirement of the compressor according to the second sub-rated heating capacity, the fourth correction factor, the fifth correction factor, and the sixth correction factor; Among them, the fourth parameter library, the fifth parameter library and the sixth parameter library corresponding to different operating modes are different.

4. The air conditioner according to any one of claims 1 to 3, wherein: The controller is further configured to determine a target frequency of the compressor according to a rated capacity of the indoor unit corresponding to the operation mode, a mode parameter corresponding to the operation mode, and a compensation coefficient corresponding to the operation mode.

5. The air conditioner according to any one of claims 1 to 4, wherein: The controller is also configured to: When the first target frequency of the compressor is within a first preset interval, controlling the operating frequency of the compressor to be adjusted to the first preset frequency at a first rate; After the compressor operates at the first preset frequency for a first period of time, the operating frequency of the compressor is controlled to be adjusted to the first target frequency at a second rate; wherein the second rate is less than the first rate.

6. The air conditioner according to claim 5, wherein: The controller is also configured to: When the second target frequency of the compressor is within the second preset interval, controlling the operating frequency of the compressor to be adjusted to the second preset frequency at a third rate; After the compressor operates at the second preset frequency for a second period of time, controlling the operating frequency of the compressor to be adjusted to the second target frequency at a fourth rate; The fourth rate is lower than the third rate, and the minimum value of the second preset interval is greater than the maximum value of the first preset interval.

7. The air conditioner according to claim 6, wherein: The controller is also configured to: When the third target frequency of the compressor is within a third preset interval, controlling the operating frequency of the compressor to be adjusted to the third preset frequency at a fifth rate; After the compressor operates at the third preset frequency for a third period of time, controlling the operating frequency of the compressor to be adjusted to the third target frequency at a sixth rate; The sixth rate is smaller than the fifth rate, and the minimum value of the third preset interval is larger than the maximum value of the second preset interval.

8. The air conditioner according to any one of claims 1 to 7, wherein: The controller is also configured to: Determining that the current outdoor environment is within a Kth temperature interval and the current operating frequency of the compressor is outside the Kth frequency interval; Taking the frequency value closest to the current operating frequency of the compressor in the Kth frequency interval as the target frequency of the compressor; Re-detecting the current outdoor ambient temperature; The Kth temperature interval corresponds to the Kth frequency interval, K=1, 2, ..., M, and M is the number of temperature intervals or the number of frequency intervals set in the operating mode.

9. The air conditioner according to any one of claims 1 to 8, wherein: The controller is also configured to: Controlling the operating frequency of the compressor to be adjusted to the target frequency; Calculating the current water temperature difference between the actual water outlet temperature and the set water outlet temperature; Determining an adjustment period corresponding to the current water temperature difference in an adjustment period library according to the current water temperature difference; Calculate the difference between the current water temperature difference and the previous current water temperature difference as the current change rate; Determine, in an amplitude adjustment library, a frequency change amplitude corresponding to the current water temperature difference and the current change rate according to the current water temperature difference and the current change rate; After the compressor runs at the target frequency to the adjustment period, the target frequency is updated according to the frequency change amplitude, and the current water temperature difference, the adjustment period and the frequency change amplitude are recalculated; Among them, the previous current water temperature difference during initial heating is 0.

10. The air conditioner according to any one of claims 1 to 9, wherein: The controller is also configured to: Sending the power-on instruction, the operation mode, and the set water outlet temperature to the indoor unit; Determining a target frequency of the compressor and a proportional-integral-derivative control rule of the compressor; sending the target frequency of the compressor and the proportional-integral-differential control rule of the compressor to the outdoor unit respectively; adjusting the operating frequency of the compressor to the target frequency; If the actual outlet water temperature is lower than the set outlet water temperature, re-determining the target frequency of the compressor and the proportional-integral-differential control rule of the compressor; If the actual outlet water temperature is greater than or equal to the set outlet water temperature, the frequency adjustment of the compressor is terminated.

11. The air conditioner according to any one of claims 1 to 10, further comprising: an expansion valve, provided in the indoor unit or the outdoor unit; Wherein, the compressor, the first heat exchanger, the expansion valve, the second heat exchanger and the compressor are connected in sequence to form a refrigerant circuit; a second temperature sensor, disposed at the water outlet, connected to the controller, and configured to detect the actual water outlet temperature; and The third temperature sensor is provided in the outdoor unit, connected to the controller, and configured to detect the current outdoor ambient temperature.

12. A method for controlling an air conditioner, wherein: The air conditioner comprises: Indoor unit, including: a first heat exchanger; Outdoor unit, including: A second heat exchanger; expansion valve; and A compressor, wherein the compressor, the first heat exchanger, the expansion valve, the second heat exchanger and the compressor are connected in sequence to form a refrigerant circuit; wherein one of the first heat exchanger and the second heat exchanger is a condenser and the other is an evaporator; a circulation pipeline, at least a portion of which passes through the condenser, and the circulation pipeline is configured to perform heat exchange with the condenser so as to heat a medium in the circulation pipeline through the condenser; and A controller connected to the compressor; Wherein, the method comprises: In response to the received power-on command, detecting a current operating mode of the air conditioner; Acquire at least one of a current outdoor ambient temperature, an actual water outlet temperature, a set water outlet temperature, a water inlet temperature, and a rated capacity of the indoor unit, and calculate an initial capacity requirement of the compressor according to a current operation mode of the air conditioner, the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature, and at least one of the rated capacity of the indoor unit; calculating a target frequency of the compressor according to an initial capacity requirement of the compressor; A corresponding start-up control instruction is determined in a preset control library according to the target frequency of the compressor, and the frequency of the compressor is controlled to be adjusted to the target frequency according to the determined start-up control instruction.

13. The control method of the air conditioner according to claim 12, wherein: The condenser includes a water inlet and a water outlet, the circulation pipeline is connected to the water inlet and the water outlet respectively, the air conditioner also includes a first temperature sensor, the first temperature sensor is arranged at the water inlet, and is configured to detect the inlet water temperature; the operation mode includes a first mode and a second mode; when the air conditioner operates in the first mode, the first heat exchanger is the evaporator, and the second heat exchanger is the condenser; when the air conditioner operates in the second mode, the first heat exchanger is the condenser, and the second heat exchanger is the evaporator; the rated capacity of the indoor unit includes a first sub-rated capacity, and the first sub-rated capacity includes a rated cooling capacity of the indoor unit or a first sub-rated heating capacity of the indoor unit; the first mode corresponds to the rated cooling capacity; the second mode corresponds to the first sub-rated heating capacity; The step of obtaining at least one of the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature, and the rated capacity of the indoor unit, and calculating the initial capacity requirement of the compressor according to the current operation mode of the air conditioner, the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature, and at least one of the rated capacity of the indoor unit comprises: In the case where the air conditioner is running in a target mode, obtaining the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature and the first sub-rated capacity; the target mode includes the first mode or the second mode; Determine a first correction coefficient corresponding to the inlet water temperature in a first parameter library according to the inlet water temperature; Calculating the water temperature difference between the actual water outlet temperature and the set water outlet temperature; Determining a second correction coefficient corresponding to the water temperature difference in a second parameter library according to the water temperature difference; Determining a third correction coefficient corresponding to the current outdoor ambient temperature in a third parameter library according to the current outdoor ambient temperature; determining an initial capacity requirement of the compressor according to the first sub-rated capacity of the indoor unit, the first correction coefficient, the second correction coefficient, and the third correction coefficient; Among them, the first parameter library, the second parameter library and the third parameter library corresponding to different operating modes are different.

14. The control method of the air conditioner according to claim 12 or 13, wherein: The operation mode also includes a third mode; the rated capacity of the indoor unit includes a second sub-rated heating capacity; the second sub-rated heating capacity corresponds to the third mode; wherein the obtaining of at least one of the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and the rated capacity of the indoor unit, and calculating the initial capacity requirement of the compressor according to the current operation mode of the air conditioner, the current outdoor ambient temperature, the actual water outlet temperature, the set water outlet temperature, the water inlet temperature and at least one of the rated capacity of the indoor unit, comprises: When the air conditioner operates in the third mode, the current outdoor ambient temperature, the actual outlet water temperature, the set outlet water temperature, the inlet water temperature and the second sub-rated heating capacity are obtained; and a fourth correction coefficient corresponding to the second rated heating capacity of the indoor unit is determined in a fourth parameter library according to the second rated heating capacity of the indoor unit; Calculating the water temperature difference between the actual water outlet temperature and the set water outlet temperature; Determining a corresponding fifth correction coefficient in a fifth parameter library according to the water temperature difference; Determining a corresponding sixth correction coefficient in a sixth parameter library according to the current outdoor ambient temperature; determining an initial capacity requirement of the compressor according to the second sub-rated heating capacity, the fourth correction factor, the fifth correction factor, and the sixth correction factor; Among them, the fourth parameter library, the fifth parameter library and the sixth parameter library corresponding to different operating modes are different.

15. The method for controlling an air conditioner according to any one of claims 12 to 14, wherein: The calculating the target frequency of the compressor according to the initial capacity requirement of the compressor comprises: The target frequency of the compressor is determined according to the rated capacity of the indoor unit corresponding to the operation mode, the mode parameter corresponding to the operation mode, and the compensation coefficient corresponding to the operation mode.

16. The method for controlling an air conditioner according to any one of claims 12 to 15, wherein: The step of matching a corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to run to the target frequency according to the matched startup control instruction comprises: When the first target frequency of the compressor is within a first preset interval, controlling the operating frequency of the compressor to be adjusted to the first preset frequency at a first rate; After the compressor operates at the first preset frequency for a first period of time, the operating frequency of the compressor is controlled to be adjusted to the first target frequency at a second rate; wherein the second rate is less than the first rate.

17. The control method of the air conditioner according to claim 16, wherein: The step of matching a corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to run to the target frequency according to the matched startup control instruction comprises: When the second target frequency of the compressor is within the second preset interval, controlling the operating frequency of the compressor to be adjusted to the second preset frequency at a third rate; After the compressor operates at the second preset frequency for a second period of time, controlling the operating frequency of the compressor to be adjusted to the second target frequency at a fourth rate; The fourth rate is lower than the third rate, and the minimum value of the second preset interval is greater than the maximum value of the first preset interval.

18. The method for controlling an air conditioner according to claim 17, wherein: The step of matching a corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to run to the target frequency according to the matched startup control instruction further comprises: When the third target frequency of the compressor is within a third preset interval, controlling the compressor to increase the operating frequency to the third preset frequency at a fifth rate; After the compressor operates at the third preset frequency for a third period of time, controlling the compressor to adjust the operating frequency to the third target frequency at a sixth rate; The maximum value of the second preset interval is smaller than the minimum value of the third preset interval.

19. The method for controlling an air conditioner according to any one of claims 12 to 18, wherein: The step of matching a corresponding startup control instruction in a preset control library according to the target frequency of the compressor, and controlling the compressor to run to the target frequency according to the matched startup control instruction further comprises: Determining that the current outdoor environment is within a Kth temperature interval and the current operating frequency of the compressor is outside the Kth frequency interval; Taking the frequency value closest to the current operating frequency of the compressor in the Kth frequency interval as the target frequency of the compressor; Re-detecting the current outdoor ambient temperature; The Kth temperature interval corresponds to the Kth frequency interval, K=1, 2, ..., M, and M is the number of temperature intervals or the number of frequency intervals set in the operating mode.

20. The control method of an air conditioner according to any one of claims 12 to 19, wherein the corresponding startup control instruction is matched in a preset control library according to the target frequency of the compressor, and the compressor is controlled to run to the target frequency according to the matched startup control instruction, further comprising: Controlling the operating frequency of the compressor to be adjusted to the target frequency; Calculating the current water temperature difference between the actual water outlet temperature and the set water outlet temperature; Determining an adjustment period corresponding to the current water temperature difference in an adjustment period library according to the current water temperature difference; Calculate the difference between the current water temperature difference and the previous current water temperature difference as the current change rate; Determine, in an amplitude adjustment library, a frequency change amplitude corresponding to the current water temperature difference and the current change rate according to the current water temperature difference and the current change rate; After the compressor runs at the target frequency to the adjustment period, the target frequency is updated according to the frequency change amplitude, and the current water temperature difference, the adjustment period and the frequency change amplitude are recalculated; Among them, the previous current water temperature difference during initial heating is 0.

21. The method for controlling an air conditioner according to any one of claims 12 to 20, further comprising: Sending the power-on instruction, the operation mode, and the set water outlet temperature to the indoor unit; Determining a target frequency of the compressor and a proportional-integral-derivative control rule of the compressor; sending the target frequency of the compressor and the proportional-integral-differential control rule of the compressor to the outdoor unit respectively; adjusting the operating frequency of the compressor to the target frequency; If the actual outlet water temperature is lower than the set outlet water temperature, re-determining the target frequency of the compressor and the proportional-integral-differential control rule of the compressor; If the actual outlet water temperature is greater than or equal to the set outlet water temperature, the frequency adjustment of the compressor is terminated.

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