Heat recovery air conditioner control method and apparatus, heat recovery air conditioner, and storage medium

Abstract

The present application discloses a heat recovery air conditioner control method and apparatus, a heat recovery air conditioner, and a storage medium. According to the present application, when a heat recovery air conditioner is in a started state, an outdoor environment temperature and a target gear of a compressor in an outdoor unit are acquired; on the basis of the outdoor environment temperature and the target gear, a fan of the outdoor unit is controlled to perform initialization operation; and after the initialization operation of the fan of the outdoor unit is finished, pressure information of the outdoor unit and the water tank temperature of an indoor water tank are acquired, and, on the basis of the pressure information and the water tank temperature, the fan gear of the fan of the outdoor unit is adjusted.

Description

Heat recovery air conditioner control method, device, heat recovery air conditioner and storage medium

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202310986022.9 filed on August 7, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of air conditioners, and in particular to a heat recovery air conditioner control method and device, a heat recovery air conditioner, and a storage medium. Background Art

[0004] A heat recovery air conditioner (HAC) can simultaneously provide long-term hot water and cooling or heating. Each component can operate independently or simultaneously, and within these scenarios, there are two operating modes: partial heat recovery and full heat recovery. While heat recovery A / C systems can reduce the impact on outdoor unit heat exchange when both cooling and hot water are required, they can also provide less precise fan control, resulting in unnecessary heat consumption.

[0005] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art.

[0006] Summary of the Invention

[0007] The main purpose of this application is to provide a heat recovery air conditioner control method, device, heat recovery air conditioner and storage medium, aiming to solve the technical problem that the fan control in some heat recovery modes in the prior art is not precise enough, resulting in high operating consumption.

[0008] To achieve the above-mentioned object, the present application provides a heat recovery air conditioner fan control method, the heat recovery air conditioner fan control method is used for a heat recovery air conditioner, the heat recovery air conditioner includes an indoor water tank, an outdoor unit and a plurality of indoor units, the outdoor unit is connected to the indoor water tank, and each indoor unit is respectively connected to the outdoor unit;

[0009] The heat recovery air conditioner control method includes:

[0010] When the heat recovery air conditioner is in a startup state, obtaining the outdoor ambient temperature and the target gear position of the compressor in the outdoor unit;

[0011] controlling the fan of the outdoor unit to perform initial operation according to the outdoor ambient temperature and the target gear;

[0012] After the fan initialization operation of the outdoor unit is completed, the pressure information of the outdoor unit and the water tank temperature of the indoor water tank are obtained, and the fan gear of the fan of the outdoor unit is adjusted according to the pressure information and the water tank temperature.

[0013] In one embodiment, controlling the fan of the outdoor unit to perform initial operation according to the outdoor ambient temperature and the target gear position includes:

[0014] Determine the target temperature range within which the outdoor ambient temperature falls;

[0015] determining a frequency ratio according to the target gear and a preset maximum frequency;

[0016] querying an initial windshield comparison table according to the target temperature range and the frequency ratio to obtain an initialization frequency;

[0017] The fan of the outdoor unit is controlled to perform initialization operation according to the initialization frequency.

[0018] In one embodiment, after controlling the fan of the outdoor unit to perform initial operation according to the outdoor ambient temperature and the target gear, the method further includes:

[0019] When the initialization operation time of the fan of the outdoor unit reaches a preset time threshold, the initialization operation is terminated;

[0020] or,

[0021] When the high-voltage temperature and the initialization operation time of the outdoor unit meet the initialization exit condition, the initialization operation is terminated.

[0022] In one embodiment, adjusting the fan gear of the outdoor unit's fan according to the pressure information and the water tank temperature includes:

[0023] determining a high-pressure saturation temperature based on the pressure information;

[0024] determining a first temperature threshold and a second temperature threshold according to the water tank temperature;

[0025] The fan gear of the outdoor unit's fan is adjusted according to the high-pressure saturation temperature, the first temperature threshold, and the second temperature threshold.

[0026] In one embodiment, adjusting the fan gear of the outdoor unit fan according to the high-pressure saturation temperature, the first temperature threshold, and the second temperature threshold includes:

[0027] determining a temperature comparison interval according to the first temperature threshold and the second temperature threshold;

[0028] Comparing the high-pressure saturation temperature with the temperature comparison interval, and determining a change in windshield according to the comparison result;

[0029] The fan gear of the outdoor unit's fan is adjusted according to the variable windshield.

[0030] In one embodiment, after adjusting the fan gear of the outdoor unit fan according to the pressure information and the water tank temperature, the method further includes:

[0031] When the indoor unit load changes, obtain the outdoor unit capacity and the number of indoor units with energy demand;

[0032] Determining the total capacity of indoor energy requirements based on the number of indoor units with energy requirements;

[0033] The fan gear of the outdoor unit fan is adjusted according to the total capacity required by the indoor functions and the capacity of the outdoor unit.

[0034] In one embodiment, adjusting the fan gear of the outdoor unit fan according to the required total capacity of the indoor functions and the capacity of the outdoor unit includes:

[0035] Determining an internal / external capacity ratio based on the total capacity required for the indoor functions and the capacity of the outdoor unit;

[0036] determining a ratio fluctuation parameter according to the internal and external capacity ratio;

[0037] The fan gear of the outdoor unit's fan is adjusted according to the ratio fluctuation parameter and a preset fluctuation threshold.

[0038] In addition, to achieve the above-mentioned purpose, the present application also proposes a heat recovery air conditioner control device, the heat recovery air conditioner control device comprising:

[0039] A data acquisition module, configured to acquire the outdoor ambient temperature and the target gear position of the compressor in the outdoor unit when the heat recovery air conditioner is in a startup state;

[0040] an initialization module, configured to control the fan of the outdoor unit to perform initialization operation according to the outdoor ambient temperature and the target gear position;

[0041] The gear adjustment module is used to obtain the pressure information and water tank temperature of the outdoor unit after the initialization operation of the outdoor unit fan is completed, and adjust the fan gear of the outdoor unit fan according to the pressure information and the water tank temperature.

[0042] In addition, to achieve the above-mentioned purpose, the present application also proposes a heat recovery air conditioner, wherein the heat recovery air conditioner X includes: a memory, a processor, and a heat recovery air conditioner control program stored in the memory and running on the processor, wherein the heat recovery air conditioner control program is configured to implement the heat recovery air conditioner control method described above.

[0043] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, on which a heat recovery air conditioner control program is stored. When the heat recovery air conditioner control program is executed by a processor, the heat recovery air conditioner control method described above is implemented.

[0044] In this application, when the heat recovery air conditioner is in the startup state, the outdoor ambient temperature and the target gear of the compressor in the outdoor unit are obtained; the fan of the outdoor unit is controlled to perform initial operation based on the outdoor ambient temperature and the target gear; after the initial operation of the fan of the outdoor unit is completed, the pressure information of the outdoor unit and the water tank temperature of the indoor water tank are obtained, and the fan gear of the outdoor unit fan is adjusted based on the pressure information and the water tank temperature. In this way, the fan is first initialized based on the outdoor ambient temperature and the target gear of the compressor, and then the fan gear of the outdoor unit is adjusted in real time based on the pressure information of the outdoor unit and the temperature of the indoor water tank during the operation of the heat recovery air conditioner. In partial heat recovery mode, there are two cold condensing devices, so the heat exchange demand for the outdoor unit is relatively small. At this time, the fan gear is adjusted in a timely manner based on the water tank and outdoor information to optimize the fan control, which can reduce operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] FIG1 is a schematic structural diagram of a heat recovery air conditioner in a hardware operating environment according to an embodiment of the present application;

[0046] FIG2 is a flow chart of a first embodiment of a heat recovery air conditioner control method of the present application;

[0047] FIG3 is a schematic diagram of the system structure of an embodiment of the heat recovery air conditioner control method of the present application;

[0048] FIG4 is a flow chart of a second embodiment of a heat recovery air conditioner control method of the present application;

[0049] FIG5 is a flow chart of a third embodiment of a heat recovery air conditioner control method of the present application;

[0050] FIG6 is a structural block diagram of the first embodiment of the heat recovery air conditioner control device of the present application.

[0051] Description of Figure Numbers:

[0052] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0054] Refer to Figure 1, which is a schematic structural diagram of a heat recovery air conditioner in a hardware operating environment according to an embodiment of the present application.

[0055] As shown in Figure 1, the heat recovery air conditioner may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may include a standard wired interface and a wireless interface (such as a wireless fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) memory, or a stable non-volatile memory (NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0056] Those skilled in the art will appreciate that the structure shown in FIG1 does not limit the heat recovery air conditioner and may include more or fewer components than shown, or a combination of certain components, or a different arrangement of components.

[0057] As shown in FIG1 , the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a heat recovery air conditioner control program.

[0058] In the heat recovery air conditioner shown in Figure 1, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the heat recovery air conditioner of this application can be set in the heat recovery air conditioner, and the heat recovery air conditioner calls the heat recovery air conditioner control program stored in the memory 1005 through the processor 1001, and executes the heat recovery air conditioner control method provided by this application.

[0059] The present application provides a heat recovery air conditioner control method. Referring to FIG. 2 , FIG. 2 is a flow chart of a first embodiment of the heat recovery air conditioner control method of the present application.

[0060] In one embodiment, the heat recovery air conditioner control method includes the following steps:

[0061] Step S10: When the heat recovery air conditioner is in the startup state, obtain the outdoor ambient temperature and the target gear position of the compressor in the outdoor unit.

[0062] In one embodiment, the execution subject of this application may be the heat recovery air conditioner described above, which has functions such as data processing, data communication, and program execution. Of course, other devices with similar functions may also be used, and these implementation conditions do not limit this. For ease of explanation, this embodiment uses a heat recovery air conditioner as an example.

[0063] It should be noted that FIG3 is a schematic diagram of the structure of the heat recovery air conditioner of the present application. In one embodiment, when it is detected that the heat recovery air conditioner is being started and is in partial heat recovery mode, that is, the outdoor unit and water tank act as condensing equipment and the indoor unit of the air conditioner acts as an evaporating equipment, some heat will be dissipated into the environment.

[0064] A heat recovery air conditioner (HAC) can simultaneously provide long-term hot water production and cooling or heating. Each component can operate independently or simultaneously, with partial heat recovery and full heat recovery operating modes within these scenarios. A heat recovery AAC can minimize the impact on outdoor unit heat exchange when both cooling and hot water are required. In partial heat recovery mode, two condensing units operate, minimizing the demand for outdoor unit heat exchange. This optimizes fan control and reduces operating costs.

[0065] In one embodiment, the outdoor ambient temperature refers to the ambient temperature detected by the outdoor unit, and then the target gear of the compressor of the outdoor unit is obtained, wherein the target gear refers to the initial operating gear determined by the heat recovery air conditioner when it is started according to the energy demand of the indoor unit and the energy demand of the water tank.

[0066] Step S20: controlling the fan of the outdoor unit to perform initial operation according to the outdoor ambient temperature and the target gear.

[0067] It should be noted that the initialization operation means that before the real-time adjustment of the fan gear and frequency is performed, the fan is first controlled to enter the initial startup state according to the startup process of the heat recovery air conditioner based on the outdoor ambient temperature and the target gear.

[0068] In order to accurately perform the initialization operation, firstly, the temperature range of the outdoor ambient temperature is determined according to the outdoor ambient temperature, that is, the temperature range corresponding to the value range of the outdoor ambient temperature is determined.

[0069] After determining the target temperature range, first determine the fan frequency of the corresponding gear according to the target gear, then divide the fan frequency corresponding to the target gear by the preset maximum frequency to obtain the frequency ratio, and finally query the initial windshield comparison table according to the target temperature range and frequency ratio to determine the initialization frequency. Finally, control the outdoor unit fan to initialize and run according to the initialization frequency.

[0070] In one embodiment, the fan gear is defined as X, where the conversion relationship between fan speed (unit: r / min) and fan frequency is: fan speed = a*X, where a is preferably 50 and has a protection range of 5-100 rpm. Whenever the fan is turned on from 0, if the speed converted from the target gear X is lower than b, it must run at speed b for 10 seconds before switching to the target frequency b, which is preferably 400 and has a protection range of 150-600 rpm.

[0071] It should be noted that the fan starts and enters the initialization fan gear according to the ambient temperature and maintains it for 2 minutes. Specifically, the initial wind gear comparison table is shown in Table 1.

[0072] Table 1

[0073] Where x1 < x2 < x3 < x4 < x5 < x6 < x7 is selected based on the maximum and minimum speeds of different outdoor units. Optimal values ​​cannot be given. Toa1 < Toa2 < Toa3 < Toa4 < Toa5 < Toa6: Toa1 is preferably 5°C, with a protection range of 0-10°C; Toa2 is preferably 15°C, with a protection range of 5-20°C; Toa3 is preferably 20°C, with a protection range of 10-30°C; Toa4 is preferably 30°C, with a protection range of 20-38°C; Toa5 is preferably 40°C, with a protection range of 30-45°C; Toa6 is preferably 45°C, with a protection range of 40-50°C. T4CoolMaxFre4: The ratio of the current target frequency to the maximum operating frequency at the current T4 temperature. a1<a2<a3<a4<; a1 preferably takes a value of 20%, with a protection range of 10-30%; a2 preferably takes a value of 40%, with a protection range of 30-55%; a3 preferably takes a value of 60%, with a protection range of 45-70%; a4 preferably takes a value of 80%, with a protection range of 60-90%.

[0074] In this way, the process of initializing the control of the fan based on the initial windshield comparison table is realized, and the fan frequency that is optimal for the ambient temperature can be selected for operation.

[0075] In order to exit in time after the initialization operation to proceed to the next process, a judgment step is performed after step S10, that is, when the initialization operation time of the outdoor unit fan reaches the preset time threshold, or the high-pressure temperature and the initialization operation time meet the initialization exit conditions, the initialization operation is automatically ended and exited.

[0076] The condition for exiting initialization is: the initialization time of the oil return phase in heating mode reaches 20 seconds. The 20 seconds is a preset time threshold, which can also be any other set time threshold and is not limited by this application. Another condition is to meet the initialization exit condition: the initialization run time in cooling mode reaches 2 minutes or [Tc ≥ 56°C and initialization time ≥ 20 seconds] to exit initialization control. Initialization is exited if either or both conditions are met.

[0077] In this way, it is possible to judge and exit the initialization control through multiple conditions, so that the heat recovery air conditioner can exit the initialization control in time and enter the step of adjusting the fan frequency in real time.

[0078] Step S30: After the fan initialization operation of the outdoor unit is completed, the pressure information of the outdoor unit and the water tank temperature of the indoor water tank are obtained, and the fan gear of the fan of the outdoor unit is adjusted according to the pressure information and the water tank temperature.

[0079] In one embodiment, after the initialization operation of the fan is completed, the pressure information of the outdoor unit and the water tank temperature corresponding to the indoor water tank are obtained, so that the operating status of the heat recovery air conditioner can be constantly grasped according to the pressure information and the water tank temperature and the fan frequency can be adjusted in real time, thereby saving costs while ensuring the operating effect of the heat recovery air conditioner.

[0080] The present application realizes that the fan is first initialized to operate according to the outdoor ambient temperature and the target gear of the compressor, and then the fan gear of the outdoor unit is adjusted in real time according to the pressure information of the outdoor unit and the temperature of the indoor water tank during the operation of the heat recovery air conditioner. In the partial heat recovery mode, there are two cold condensing devices, so the demand for heat exchange of the outdoor unit is relatively small. At this time, the fan gear is adjusted in time based on the information of the water tank and the outdoor to optimize the fan control, which can reduce the operating cost.

[0081] Refer to FIG4 , which is a flow chart of a second embodiment of a heat recovery air conditioner control method of the present application.

[0082] Based on the first embodiment, in one embodiment, the heat recovery air conditioner control method includes, in step S30, the following steps:

[0083] Step S301: determining the high-pressure saturation temperature according to the pressure information.

[0084] It should be noted that the high-pressure saturation temperature refers to the pressure signal received by the pressure sensor determined based on the pressure information, which is converted into the saturation temperature under this pressure, called the high-pressure temperature Tc.

[0085] Step S302: determining a first temperature threshold and a second temperature threshold according to the water tank temperature.

[0086] The first temperature threshold and the second temperature threshold refer to the temperature thresholds calculated according to the water tank temperature. The first temperature threshold is K1=Tw+c, and K1 min ≤K1≤K1 max K2=Tw+d, and K2 min ≤K2≤K2 max K1 min The preferred value is 35℃, and the protection range is 30-45℃; K1 max The preferred value is 50℃, and the protection range is 45-60℃; K2 min The preferred value is 38℃, and the protection range is 30-45℃; K2 max The preferred value is 53°C, and the protection range is 45-60°C.

[0087] Step S303: adjusting the fan gear of the outdoor unit's fan according to the high-pressure saturation temperature, the first temperature threshold, and the second temperature threshold.

[0088] In one embodiment, after the high-pressure saturation temperature is determined, the gear position of the outdoor unit's fan is determined in combination with the first temperature threshold and the second temperature threshold.

[0089] In order to accurately adjust the fan gear, a temperature comparison interval is first constructed based on the first temperature threshold and the second temperature threshold. Specifically, the temperature comparison interval is three intervals composed of K1 and K2, which are less than K1, greater than K2, and greater than or equal to K1 and less than or equal to K2.

[0090] It should be noted that the high-pressure saturation temperature is compared with the three value ranges of the thermometer comparison interval to determine the variable windshield. Specifically, 1) when the actual high-pressure temperature Tc is less than K1°C, ΔX = Tc-K1; 2) when the actual high-pressure temperature Tc is greater than K2°C, ΔX = (Tc-K2)*2; 3) when K1°C ≤ actual high-pressure Tc ≤ K2°C, ΔX = 0. Tw is the water temperature in the water tank, which can be detected by the temperature sensor. c is preferably 18, with a protection range of 5-25. d is preferably 18, with a protection range of 5-25.

[0091] If Tc ≥ Tc1 is detected at any time, the outdoor fan is immediately adjusted to the highest operating gear without cycle restrictions; normal control is then restored when Tc ≤ Tc1. If Tc ≤ Tc3 is detected at any time, the outdoor fan is immediately adjusted to 0 without cycle restrictions; in this case, the fan must meet Tc ≥ Tc4 before it can be restarted after stopping.

[0092] In this way, the outdoor fan can be adjusted accurately based on the water tank temperature, reducing consumption and costs.

[0093] The fan control of this embodiment is related to the high-pressure pressure and the water temperature of the water tank, and can achieve intelligent automatic adjustment, thereby automatically reducing costs and adjusting power consumption according to actual needs.

[0094] Refer to FIG5 , which is a flow chart of a third embodiment of a heat recovery air conditioner control method of the present application.

[0095] Based on the first embodiment, in one embodiment, the heat recovery air conditioner control method further includes, after step S30:

[0096] Step S31: When the load of the indoor unit changes, the capacity of the outdoor unit and the number of indoor units with energy demand are obtained.

[0097] It should be noted that in most scenarios, conventional control can quickly achieve balance through adjustment. However, when indoor unit load fluctuates significantly, fan adjustment lags behind pressure changes. Adding a feedforward mechanism to recalculate the windage at the beginning of the load change can avoid sudden changes in system pressure during fan control.

[0098] When the indoor unit load changes, the number of indoor units with energy demand changes, and the number of indoor units that start running and have energy demand increases or decreases.

[0099] In one embodiment, the capacity of the outdoor unit refers to the power consumption and total energy demand of the outdoor unit.

[0100] Step S32: Determine the total capacity of indoor function energy requirements according to the number of indoor units with energy requirements.

[0101] It should be noted that, after the number of indoor units with energy demand is determined, the total capacity of the total energy demand of each indoor function is determined based on the number of indoor units with energy demand.

[0102] Step S33: adjusting the fan gear of the outdoor unit fan according to the total capacity required by the indoor functions and the capacity of the outdoor unit.

[0103] After determining the total capacity required by the indoor unit, adjust the outdoor unit's fan based on the outdoor unit's capacity.

[0104] In order to accurately adjust the fan gear to adapt to changes in energy demand and load, first determine the internal and external capacity ratio based on the total capacity of the indoor function and the capacity of the outdoor unit, and define Ccb = total capacity of the indoor unit with energy demand / capacity of the outdoor unit.

[0105] In one embodiment, when Ccb fluctuates from low to high by ≥ e: the initial wind speed is recalculated according to the new state. Ccb fluctuates from low to high = (Ccb of the previous cycle - current Ccb) / Ccb of the previous cycle, where e is the ratio fluctuation parameter; i. If the initial wind speed of the fan calculated under the current conditions is ≥ the current fan operating wind speed, the fan is operated according to the initial frequency, and the fan frequency is adjusted according to the above pressure after 40s. If the initial wind speed of the fan calculated under the current conditions is < the current fan operating frequency, the fan frequency is adjusted according to the above pressure. When Ccb fluctuates from low to high < e or Ccb fluctuates from high to low, the fan gear is adjusted according to the above pressure. d preferably takes a value of 20%, and the protection range is 15-50%.

[0106] This application stabilizes the windshield through conventional adjustments when the indoor unit load changes slightly. When the indoor unit load changes significantly, the application recalculates the windshield at the beginning of the load change by increasing or decreasing the feedforward adjustment method, thus avoiding sudden changes in system pressure during the fan control process.

[0107] In addition, the present application also proposes a storage medium on which a heat recovery air conditioner control program is stored. When the heat recovery air conditioner control program is executed by a processor, the steps of the heat recovery air conditioner control method described above are implemented.

[0108] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0109] 6 , which is a structural block diagram of a first embodiment of a heat recovery air conditioner control device according to the present application.

[0110] As shown in FIG6 , the heat recovery air conditioner control device proposed in this application includes:

[0111] The data acquisition module 10 is used to acquire the outdoor ambient temperature and the target gear position of the compressor in the outdoor unit when the heat recovery air conditioner is in the startup state.

[0112] In one embodiment, the execution subject of this application may be the heat recovery air conditioner described above, which has functions such as data processing, data communication, and program execution. Of course, other devices with similar functions may also be used, and these implementation conditions do not limit this. For ease of explanation, this embodiment uses a heat recovery air conditioner as an example.

[0113] It should be noted that FIG3 is a schematic diagram of the structure of the heat recovery air conditioner of the present application. In one embodiment, when it is detected that the heat recovery air conditioner is being started and is in partial heat recovery mode, that is, the outdoor unit and water tank act as condensing equipment and the indoor unit of the air conditioner acts as an evaporating equipment, some heat will be dissipated into the environment.

[0114] A heat recovery air conditioner (HAC) can simultaneously provide long-term hot water production and cooling or heating. Each component can operate independently or simultaneously, with partial heat recovery and full heat recovery operating modes within these scenarios. A heat recovery AAC can minimize the impact on outdoor unit heat exchange when both cooling and hot water are required. In partial heat recovery mode, two condensing units operate, minimizing the demand for outdoor unit heat exchange. This optimizes fan control and reduces operating costs.

[0115] In one embodiment, the outdoor ambient temperature refers to the ambient temperature detected by the outdoor unit, and then the target gear of the compressor of the outdoor unit is obtained, wherein the target gear refers to the initial operating gear determined by the heat recovery air conditioner when it is started according to the energy demand of the indoor unit and the energy demand of the water tank.

[0116] The initialization module 20 is used to control the fan of the outdoor unit to perform initialization operation according to the outdoor ambient temperature and the target gear.

[0117] It should be noted that the initialization operation means that before the real-time adjustment of the fan gear and frequency is performed, the fan is first controlled to enter the initial startup state according to the startup process of the heat recovery air conditioner based on the outdoor ambient temperature and the target gear.

[0118] In order to accurately perform the initialization operation, firstly, the temperature range of the outdoor ambient temperature is determined according to the outdoor ambient temperature, that is, the temperature range corresponding to the value range of the outdoor ambient temperature is determined.

[0119] After determining the target temperature range, first determine the fan frequency of the corresponding gear according to the target gear, then divide the fan frequency corresponding to the target gear by the preset maximum frequency to obtain the frequency ratio, and finally query the initial windshield comparison table according to the target temperature range and frequency ratio to determine the initialization frequency. Finally, control the outdoor unit fan to initialize and run according to the initialization frequency.

[0120] In one embodiment, the fan gear is defined as X, where the conversion relationship between fan speed (unit: r / min) and fan frequency is: fan speed = a*X, where a is preferably 50 and has a protection range of 5-100 rpm. Whenever the fan is turned on from 0, if the speed converted from the target gear X is lower than b, it must run at speed b for 10 seconds before switching to the target frequency b, which is preferably 400 and has a protection range of 150-600 rpm.

[0121] It should be noted that the fan starts and enters the initialization fan gear according to the ambient temperature and maintains it for 2 minutes. Specifically, the initial wind gear comparison table is shown in Table 1.

[0122] Where x1 < x2 < x3 < x4 < x5 < x6 < x7 is selected based on the maximum and minimum speeds of different outdoor units. Optimal values ​​cannot be given. Toa1 < Toa2 < Toa3 < Toa4 < Toa5 < Toa6: Toa1 is preferably 5°C, with a protection range of 0-10°C; Toa2 is preferably 15°C, with a protection range of 5-20°C; Toa3 is preferably 20°C, with a protection range of 10-30°C; Toa4 is preferably 30°C, with a protection range of 20-38°C; Toa5 is preferably 40°C, with a protection range of 30-45°C; Toa6 is preferably 45°C, with a protection range of 40-50°C. T4CoolMaxFre4: The ratio of the current target frequency to the maximum operating frequency at the current T4 temperature. a1<a2<a3<a4<; a1 preferably takes a value of 20%, with a protection range of 10-30%; a2 preferably takes a value of 40%, with a protection range of 30-55%; a3 preferably takes a value of 60%, with a protection range of 45-70%; a4 preferably takes a value of 80%, with a protection range of 60-90%.

[0123] In this way, the process of initializing the control of the fan based on the initial windshield comparison table is realized, and the fan frequency that is optimal for the ambient temperature can be selected for operation.

[0124] In order to exit in time after the initialization operation to proceed to the next process, a judgment step is performed after step S10, that is, when the initialization operation time of the outdoor unit fan reaches the preset time threshold, or the high-pressure temperature and the initialization operation time meet the initialization exit conditions, the initialization operation is automatically ended and exited.

[0125] The condition for exiting initialization is: the initialization time during the oil return phase of heating mode reaches 20 seconds. The 20 seconds is a preset time threshold, but it can also be any other set time threshold, which is not limited by this application. Another condition for exiting initialization is that the initialization run time in cooling mode reaches 2 minutes or [Tc ≥ 56°C and initialization time ≥ 20 seconds] to exit initialization control. Initialization is exited if either or both conditions are met.

[0126] In this way, it is possible to judge and exit the initialization control through multiple conditions, so that the heat recovery air conditioner can exit the initialization control in time and enter the step of adjusting the fan frequency in real time.

[0127] The gear adjustment module 30 is used to obtain the pressure information and water tank temperature of the outdoor unit after the initialization operation of the outdoor unit fan is completed, and adjust the fan gear of the outdoor unit fan according to the pressure information and the water tank temperature.

[0128] In one embodiment, after the initialization operation of the fan is completed, the pressure information of the outdoor unit and the water tank temperature corresponding to the indoor water tank are obtained, so that the operating status of the heat recovery air conditioner can be constantly grasped according to the pressure information and the water tank temperature and the fan frequency can be adjusted in real time, thereby saving costs while ensuring the operating effect of the heat recovery air conditioner.

[0129] The present application realizes that the fan is first initialized to operate according to the outdoor ambient temperature and the target gear of the compressor, and then the fan gear of the outdoor unit is adjusted in real time according to the pressure information of the outdoor unit and the temperature of the indoor water tank during the operation of the heat recovery air conditioner. In the partial heat recovery mode, there are two cold condensing devices, so the demand for heat exchange of the outdoor unit is relatively small. At this time, the fan gear is adjusted in time based on the information of the water tank and the outdoor to optimize the fan control, which can reduce the operating cost.

[0130] The above is only an example and does not constitute any limitation to the technical solution of the present application. In specific applications, technicians in this field can make settings as needed, and the present application does not impose any restrictions on this.

[0131] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this application. In actual applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of this embodiment scheme, and no restrictions are imposed here.

[0132] In addition, for technical details not fully described in one embodiment, please refer to the heat recovery air conditioner control method provided in any embodiment of the present application, and will not be repeated here.

[0133] In addition, it should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0134] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0135] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0136] The above are merely optional embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heat recovery air conditioner control method, wherein: The heat recovery air conditioner fan control method is used for a heat recovery air conditioner, wherein the heat recovery air conditioner comprises an indoor water tank, an outdoor unit and a plurality of indoor units, wherein the outdoor unit is connected to the indoor water tank, and each indoor unit is respectively connected to the outdoor unit; The heat recovery air conditioner control method comprises: When the heat recovery air conditioner is in a startup state, obtaining the outdoor ambient temperature and the target gear position of the compressor in the outdoor unit; Controlling the fan of the outdoor unit to perform initialization operation according to the outdoor ambient temperature and the target gear position; After the fan initialization operation of the outdoor unit is completed, the pressure information of the outdoor unit and the water tank temperature of the indoor water tank are obtained, and the fan gear of the fan of the outdoor unit is adjusted according to the pressure information and the water tank temperature.

2. The heat recovery air conditioner control method according to claim 1, wherein: The step of controlling the fan of the outdoor unit to perform initial operation according to the outdoor ambient temperature and the target gear position includes: Determine a target temperature range within which the outdoor ambient temperature is located; determining a frequency ratio according to the target gear and a preset maximum frequency; According to the target temperature range and the frequency ratio, an initial windshield comparison table is searched to obtain an initialization frequency; The fan of the outdoor unit is controlled to perform initialization operation according to the initialization frequency.

3. The heat recovery air conditioner control method according to claim 1, wherein: After the fan of the outdoor unit is controlled to perform initial operation according to the outdoor ambient temperature and the target gear, the method further includes: When the initialization operation time of the fan of the outdoor unit reaches a preset time threshold, the initialization operation is terminated; or, When the high-pressure temperature and the initialization operation time of the outdoor unit meet the initialization exit condition, the initialization operation is terminated.

4. The heat recovery air conditioner control method according to claim 1, wherein: The step of adjusting the fan gear position of the fan of the outdoor unit according to the pressure information and the water tank temperature includes: determining a high pressure saturation temperature according to the pressure information; Determining a first temperature threshold and a second temperature threshold according to the water tank temperature; The fan gear of the fan of the outdoor unit is adjusted according to the high-pressure saturation temperature, the first temperature threshold, and the second temperature threshold.

5. The heat recovery air conditioner control method according to claim 4, wherein: The step of adjusting the fan gear of the outdoor unit according to the high-pressure saturation temperature, the first temperature threshold, and the second temperature threshold comprises: determining a temperature comparison interval according to the first temperature threshold and the second temperature threshold; Comparing the high pressure saturation temperature with the temperature comparison interval, and determining a change in the windshield according to the comparison result; The fan gear position of the fan of the outdoor unit is adjusted according to the variable windshield.

6. The heat recovery air conditioner control method according to any one of claims 1 to 5, wherein: After adjusting the fan gear of the fan of the outdoor unit according to the pressure information and the water tank temperature, the method further includes: When the load of the indoor unit changes, the capacity of the outdoor unit and the number of indoor units with energy demand are obtained; Determining the total capacity of indoor energy demand according to the number of indoor units with energy demand; The fan gear position of the fan of the outdoor unit is adjusted according to the total capacity required by the indoor functions and the capacity of the outdoor unit.

7. The heat recovery air conditioner control method according to claim 6, wherein: The step of adjusting the fan gear position of the fan of the outdoor unit according to the total capacity required by the indoor functions and the capacity of the outdoor unit includes: Determining the internal and external capacity ratio according to the total capacity required for the indoor functions and the capacity of the outdoor unit; Determining a ratio fluctuation parameter according to the internal and external capacity ratio; The fan gear of the fan of the outdoor unit is adjusted according to the ratio fluctuation parameter and the preset fluctuation threshold.

8. A heat recovery air conditioner control device, wherein: The heat recovery air conditioner control device comprises: A data acquisition module, used for acquiring the outdoor ambient temperature and the target gear position of the compressor in the outdoor unit when the heat recovery air conditioner is in the startup state; An initialization module, used for controlling the fan of the outdoor unit to perform initialization operation according to the outdoor ambient temperature and the target gear position; The gear adjustment module is used to obtain the pressure information and water tank temperature of the outdoor unit after the initialization operation of the fan of the outdoor unit is completed, and adjust the fan gear of the fan of the outdoor unit according to the pressure information and the water tank temperature.

9. A heat recovery air conditioner, wherein: The heat recovery air conditioner includes: a memory, a processor, and a heat recovery air conditioner control program stored in the memory and running on the processor, wherein the heat recovery air conditioner control program is configured to implement the heat recovery air conditioner control method according to any one of claims 1 to 7.

10. A storage medium, wherein: The storage medium stores a heat recovery air conditioner control program, and when the heat recovery air conditioner control program is executed by the processor, the heat recovery air conditioner control method according to any one of claims 1 to 7 is implemented.

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