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

Abstract

The application discloses a heat recovery air conditioner control method and device, a heat recovery air conditioner and a storage medium, and belongs to the technical field of air conditioners. The application obtains an outdoor environment temperature and a target gear of a compressor in the outdoor unit when the heat recovery air conditioner is in a starting state; controls a fan of the outdoor unit to initialize operation according to the outdoor environment temperature and the target gear; obtains pressure information of the outdoor unit and a water tank temperature of the indoor water tank after the fan of the outdoor unit initializes operation, and adjusts a fan gear of the fan of the outdoor unit according to the pressure information and the water tank temperature. In this way, there are two cold condensing devices in the partial heat recovery mode, so that the heat exchange demand of the outdoor unit is small, and the fan gear is adjusted in time based on the information of the water tank and the outdoor unit to optimize the fan control, so that the operation cost can be reduced.

Description

TECHNICAL FIELD

[0001] 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

[0002] A heat recovery air conditioner is an air conditioner that can simultaneously meet long-regulation hot water and air conditioning refrigeration or heating. There are two operation modes for each component to run alone and the same scene, and there are also partial heat recovery and full heat recovery in the same scene. When the refrigeration and hot water demand are simultaneously turned on, the heat recovery air conditioner can reduce the influence on the outdoor unit heat exchange, but the control of the fan is not accurate enough, resulting in unnecessary consumption during operation.

[0003] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The main purpose of the present application is to provide a heat recovery air conditioner control method and device, a heat recovery air conditioner, and a storage medium, which aims to solve the technical problem of high operation consumption caused by the inaccurate fan control in the partial heat recovery mode of the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides a heat recovery air conditioner control method, which 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 with the indoor water tank, and each indoor unit is connected with the outdoor unit.

[0006] The heat recovery air conditioner control method comprises:

[0007] When the heat recovery air conditioner is in a starting state, the outdoor environment temperature and the target gear of the compressor in the outdoor unit are obtained;

[0008] The fan of the outdoor unit is controlled to initialize operation according to the outdoor environment temperature and the target gear;

[0009] After the initialization 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 fan of the outdoor unit is adjusted according to the pressure information and the water tank temperature.

[0010] Optionally, the control of the fan of the outdoor unit to initialize operation according to the outdoor environment temperature and the target gear comprises:

[0011] The target temperature interval in which the outdoor environment temperature is located is determined;

[0012] The frequency ratio is determined according to the target gear and the preset maximum frequency.

[0013] query an initial frequency from an initial frequency and frequency ratio lookup table according to the target temperature interval and the frequency ratio;

[0014] control the fan of the outdoor unit to initialize running according to the initialization frequency.

[0015] Optionally, after the fan of the outdoor unit is controlled to initialize running according to the outdoor environment temperature and the target gear, the method further comprises:

[0016] when the initialization running time of the fan of the outdoor unit reaches a preset time threshold, ending the initialization running;

[0017] or,

[0018] when the high-pressure temperature of the outdoor unit and the initialization running time satisfy an initialization exit condition, ending the initialization running.

[0019] Optionally, the adjusting the fan gear of the fan of the outdoor unit according to the pressure information and the water tank temperature comprises:

[0020] determining a high-pressure saturation temperature according to the pressure information;

[0021] determining a first temperature threshold and a second temperature threshold according to the water tank temperature;

[0022] adjusting the fan gear of the fan of the outdoor unit according to the high-pressure saturation temperature, the first temperature threshold and the second temperature threshold.

[0023] Optionally, the adjusting the fan gear of the fan of the outdoor unit according to the high-pressure saturation temperature, the first temperature threshold and the second temperature threshold comprises:

[0024] determining a temperature comparison interval according to the first temperature threshold and the second temperature threshold;

[0025] comparing the high-pressure saturation temperature with the temperature comparison interval, and determining a change gear according to a comparison result;

[0026] adjusting the fan gear of the fan of the outdoor unit according to the change gear.

[0027] Optionally, after the adjusting the fan gear of the fan of the outdoor unit according to the pressure information and the water tank temperature, the method further comprises:

[0028] when the indoor unit load changes, obtaining an outdoor unit capacity and a number of indoor units with energy demand;

[0029] determining an indoor unit total capacity according to the number of indoor units with energy demand.

[0030] adjusting a fan gear of the outdoor unit according to the required total capacity of the indoor unit and the capacity of the outdoor unit.

[0031] Optionally, the adjusting a fan gear of the outdoor unit according to the required total capacity of the indoor unit and the capacity of the outdoor unit comprises:

[0032] determining an indoor-outdoor capacity ratio according to the required total capacity of the indoor unit and the capacity of the outdoor unit;

[0033] determining a ratio fluctuation parameter according to the indoor-outdoor capacity ratio;

[0034] adjusting a fan gear of the outdoor unit according to the ratio fluctuation parameter and a preset fluctuation threshold.

[0035] In addition, to achieve the above object, the present application further provides a heat recovery air conditioner control device, which comprises:

[0036] a data acquisition module, configured to acquire an outdoor environment temperature and a target gear of a compressor in the outdoor unit when the heat recovery air conditioner is in a starting state;

[0037] an initialization module, configured to control a fan of the outdoor unit to perform an initialization operation according to the outdoor environment temperature and the target gear;

[0038] a gear adjustment module, configured to acquire pressure information of the outdoor unit and a water tank temperature after the initialization operation of the fan of the outdoor unit is completed, and adjust a fan gear of the fan of the outdoor unit according to the pressure information and the water tank temperature.

[0039] In addition, to achieve the above object, the present application further provides a heat recovery air conditioner, which comprises a memory, a processor and a heat recovery air conditioner control program stored in the memory and running on the processor, and the heat recovery air conditioner control program is configured to implement the heat recovery air conditioner control method as described above.

[0040] In addition, to achieve the above object, the present application further provides a storage medium, which stores a heat recovery air conditioner control program, and the heat recovery air conditioner control program is executed by a processor to implement the heat recovery air conditioner control method as described above.

[0041] This invention, when the heat recovery air conditioner is in the start-up state, acquires the outdoor ambient temperature and the target speed of the compressor in the outdoor unit; controls the outdoor unit's fan to perform initial operation based on the outdoor ambient temperature and the target speed; after the outdoor unit's fan initial operation is completed, acquires the outdoor unit's pressure information and the water tank temperature of the indoor water tank, and adjusts the outdoor unit's fan speed based on the pressure information and water tank temperature. In this way, the fan is first initialized based on the outdoor ambient temperature and the compressor's target speed, and then the outdoor unit's fan speed is adjusted in real time based on the outdoor unit's pressure information and the indoor water tank temperature during the operation of the heat recovery air conditioner. In some heat recovery modes, there are two condensing units, so the heat exchange requirement of the outdoor unit is relatively small. In this case, timely adjustment of the fan speed based on the water tank and outdoor temperature information optimizes fan control and reduces operating costs. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of a heat recovery air conditioner in the hardware operating environment involved in the embodiments of the present invention;

[0043] Figure 2 This is a flowchart illustrating the first embodiment of the heat recovery air conditioner control method of the present invention;

[0044] Figure 3 This is a schematic diagram of the system structure in one embodiment of the heat recovery air conditioner control method of the present invention;

[0045] Figure 4 This is a flowchart illustrating the second embodiment of the heat recovery air conditioner control method of the present invention;

[0046] Figure 5 This is a flowchart illustrating the third embodiment of the heat recovery air conditioner control method of the present invention;

[0047] Figure 6 This is a structural block diagram of the first embodiment of the heat recovery air conditioner control device of the present invention.

[0048] Explanation of icon numbers:

[0049]

[0050] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0052] Reference Figure 1 , Figure 1A structure schematic diagram of a heat recovery air conditioner for a hardware running environment involved in an embodiment of the present application is shown.

[0053] As shown in Figure 1 , the heat recovery air conditioner can 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. The communication bus 1002 is used to realize the connection and communication among the components. The user interface 1003 can include a display, an input unit such as a keyboard, and can further include a standard wired interface and a wireless interface. The network interface 1004 can optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wi-Fi) interface). The memory 1005 can be a high-speed random access memory (RAM) memory or a stable non-volatile memory (NVM), such as a disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0054] Those skilled in the art can understand that Figure 1 the structure shown in the above does not constitute a limitation on the heat recovery air conditioner, and can include more or fewer components than the diagram, or combine certain components, or different component arrangements.

[0055] As shown in Figure 1 , the memory 1005 as a storage medium can include an operating system, a network communication module, a user interface module, and a heat recovery air conditioner control program.

[0056] In the heat recovery air conditioner shown in Figure 1 , the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the heat recovery air conditioner of the present application can be arranged 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 the embodiment of the present application.

[0057] The embodiment of the present application provides a heat recovery air conditioner control method, which refers to Figure 2 , Figure 2 A flowchart of a first embodiment of a heat recovery air conditioner control method of the present application is shown.

[0058] The heat recovery air conditioner control method includes the following steps:

[0059] Step S10: When the heat recovery air conditioner is in a starting state, the outdoor environment temperature and the target gear of the compressor in the outdoor unit are obtained.

[0060] In this embodiment, the execution subject of this embodiment can be the heat recovery air conditioner, which has functions of data processing, data communication, and program running. Of course, it can also be other devices with similar functions, and the implementation condition does not limit this. For the sake of convenience, the heat recovery air conditioner is taken as an example for illustration.

[0061] It should be noted that, as Figure 3 The structure diagram of the heat recovery air conditioner of this embodiment is shown in the scheme of this embodiment. When it is detected that the heat recovery air conditioner is starting, and it is in a partial heat recovery mode, that is, the outdoor unit and the water tank are used as condensing equipment, and the air conditioner indoor unit is used as evaporating equipment. Part of the heat will be dissipated to the environment.

[0062] It should be understood that the heat recovery air conditioner is an air conditioner that can simultaneously meet the long-regulation hot water and air conditioning refrigeration or heating. There are two operation modes of each component running alone and the same scene, and the same scene also has partial heat recovery and full heat recovery. When the heat recovery air conditioner is started at the same time, the heat recovery air conditioner can reduce the influence on the heat exchange of the outdoor unit. In the partial heat recovery mode, there are two cold condensing equipment, and the heat exchange demand of the outdoor unit is small. At this time, the fan control is optimized, and the operation cost can be reduced.

[0063] In specific implementation, the outdoor environment temperature refers to the environment temperature detected by the outdoor unit part, and then the target gear of the compressor of the outdoor unit is obtained. The target gear refers to the initial running gear determined by the heat recovery air conditioner according to the energy demand of the indoor unit and the energy demand of the water tank when starting.

[0064] Step S20: According to the outdoor environment temperature and the target gear, the fan of the outdoor unit is controlled to initialize running.

[0065] It should be noted that the initialization running refers to the process of real-time adjustment of the gear and frequency of the fan before the initialization running. According to the outdoor environment temperature and the target gear, the fan is first controlled to initialize the starting state according to the starting process of the heat recovery air conditioner.

[0066] Further, in order to accurately initialize running, the outdoor environment temperature is first determined according to the outdoor environment temperature, that is, the corresponding temperature interval is determined according to the value range of the outdoor environment temperature.

[0067] It should be understood that after the target temperature interval is determined, the fan frequency corresponding to the target gear is first determined according to the target gear, then the frequency ratio is obtained by dividing the fan frequency corresponding to the target gear by the preset maximum frequency, and finally the initial frequency is determined by querying the initial fan gear table according to the target temperature interval and the frequency ratio, and finally the fan of the outdoor unit is controlled to run at the initial frequency.

[0068] In a specific implementation, the fan gear is defined as X, wherein the conversion relationship between the fan speed (unit: r / min) and the fan frequency is: fan speed = a*X, and a is preferably 50, with a protection range of 5-100 rpm. At any time when the fan is started from 0 revolutions, if the target gear X converts a speed lower than b, the target frequency b is run after running at b speed for 10 s, and b is preferably 400, with a protection range of 150-600 rpm.

[0069] It should be noted that the fan starts to enter the initial fan gear according to the ambient temperature, and is maintained for 2 min. Specifically, the initial fan gear table is shown in Table 1.

[0070] Table 1

[0071]

[0072] wherein x1 < x2 < x3 < x4 < x5 < x6 < x7, and the maximum and minimum speeds of different outdoor units are selected. The preferred value 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 is the ratio of the current target frequency to the maximum frequency running at the current T4 temperature. a1 < a2 < a3 < a4 < a1 is preferably 20%, with a protection range of 10-30%; a2 is preferably 40%, with a protection range of 30-55%; a3 is preferably 60%, with a protection range of 45-70%; a4 is preferably 80%, with a protection range of 60-90%.

[0073] In this way, the process of initializing the fan control based on the initial fan gear table is realized, and the fan frequency optimal for the ambient temperature can be selected for running.

[0074] Further, in order to exit in time after the initial running for the next process, after step S10, a judgment step is further performed, that is, when the time of the fan of the outdoor unit for the initial running reaches the preset time threshold, or the high-pressure temperature and the initial running time meet the initial exit condition, the initial running is automatically ended and exited.

[0075] It should be understood that the condition for exiting the initialization is that the oil return stage initialization time in the heating mode reaches 20s, and the 20s is the preset time threshold, which can also be any other arbitrary set time threshold, and the embodiment does not limit this. Another condition is that the initial running time in the cooling operation reaches 2min or

Tc≥56℃ and initialization time≥20s

[0076] Step S30: After the initial running of the fan of the outdoor unit is ended, 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.

[0077] In a specific implementation, after the initial running of the fan is ended, the pressure information of the outdoor unit and the water tank temperature corresponding to the indoor water tank are obtained, so that the running state of the heat recovery air conditioner can be grasped at any time according to the pressure information and the water tank temperature, and the fan frequency can be adjusted in real time, so that the running effect of the heat recovery air conditioner can be ensured under the premise of saving cost.

[0078] The embodiment realizes that the fan is initially run according to the outdoor environment 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 running of the heat recovery air conditioner. In the partial heat recovery mode, there are two cold condensing devices, so the heat exchange demand of the outdoor unit is small. At this time, the fan gear is adjusted in time based on the information of the water tank and the outdoor unit to optimize the fan control, which can reduce the running cost.

[0079] Reference Figure 4 , Figure 4 The figure is a flowchart of a second embodiment of a heat recovery air conditioner control method of the application.

[0080] Based on the above first embodiment, the heat recovery air conditioner control method of the embodiment comprises the following steps in step S30:

[0081] Step S301: determining a high-pressure saturation temperature according to the pressure information.

[0082] It should be noted that the high-pressure saturation temperature refers to the saturation temperature at the pressure determined according to the pressure information, which is converted from the pressure signal received by the pressure sensor, and is referred to as the high-pressure temperature Tc.

[0083] Step S302: determining a first temperature threshold and a second temperature threshold according to the water tank temperature.

[0084] It should be understood that the first temperature threshold and the second temperature threshold refer to 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℃, and the protection range is 45-60℃.

[0085] Step S303: adjusting the fan gear of the outdoor unit according to the high-pressure saturation temperature, the first temperature threshold, and the second temperature threshold.

[0086] In a specific implementation, after determining the high-pressure saturation temperature, the fan gear of the outdoor unit is determined in combination with the first temperature threshold and the second temperature threshold.

[0087] Further, in order to accurately adjust the fan gear, first, a temperature comparison interval is constructed according to the first temperature threshold and the second temperature threshold, specifically, the temperature comparison interval is three intervals formed by 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.

[0088] It should be noted that the high-pressure saturation temperature is compared with the three value ranges of the temperature comparison interval, so as to determine the change gear, specifically, 1) when the actual high-pressure temperature Tc < K1℃, △X = Tc - K1; 2) when the actual high-pressure temperature Tc > K2℃, △X = (Tc - K2) * 2; 3) when K1℃ ≤ actual high-pressure Tc ≤ K2℃, △X = 0. Tw is the water tank water temperature, which can be detected by a temperature sensor, c is preferably 18, and the protection range is 5-25; d is preferably 18, and the protection range is 5-25.

[0089] It should be understood that, any time when Tc is detected Tc1, the outdoor fan is immediately adjusted to the highest operating gear without period limit; then when Tc is restored to Tc1, normal control is resumed. Any time when Tc is detected Tc3, the outdoor fan is immediately adjusted to 0 without period limit; at this time, the fan stops and then starts to meet Tc is greater than or equal to Tc4.

[0090] In this way, accurate adjustment of the outdoor fan based on the water tank temperature is realized, and consumption and cost are reduced

[0091] The fan control of the embodiment is related to the water temperature of the water tank and the high pressure, and intelligent automatic adjustment can be realized, automatic cost reduction is realized, and power consumption is adjusted according to actual needs.

[0092] Reference Figure 5 , Figure 5 It is a flowchart of a third embodiment of a heat recovery air conditioner control method of the application.

[0093] Based on the above-mentioned first embodiment, the heat recovery air conditioner control method of the embodiment further comprises, after the step S30:

[0094] Step S31: When the indoor unit load changes, the outdoor unit capacity and the number of indoor units with energy demand are obtained.

[0095] It should be noted that in most scenarios, conventional control can quickly reach balance through adjustment means. However, when the indoor unit load changes greatly, the adjustment of the fan lags behind the pressure change, and the feedforward means is added at the beginning of the load change. Recalculate the damper, which can avoid the sudden change of system pressure in the fan control process.

[0096] It should be understood that when the indoor unit load changes, the number of indoor units with energy demand changes, the number of indoor units with energy demand increases or decreases.

[0097] In specific implementation, the outdoor unit capacity refers to the total power consumption and energy demand of the outdoor unit.

[0098] Step S32: Determine the total capacity of the indoor unit energy demand based on the number of indoor units with energy demand.

[0099] It should be noted that after the number of indoor units with energy demand is determined, the total capacity of the sum of the energy demands of each indoor unit is determined based on the number of indoor units with energy demand.

[0100] Step S33: Adjust the fan gear of the outdoor fan according to the total capacity of the indoor unit energy demand and the outdoor unit capacity.

[0101] It should be understood that after the total capacity of the indoor unit energy demand is determined, the outdoor fan is adjusted in combination with the capacity of the outdoor unit.

[0102] Further, in order to accurately adjust the fan gear to adapt to the changes of the capacity and the load, first, the capacity ratio of the indoor unit to the outdoor unit is determined according to the total capacity of the indoor unit and the capacity of the outdoor unit, and Ccb is defined as the total capacity of the indoor unit / capacity of the outdoor unit.

[0103] In a specific implementation, when Ccb fluctuates from low to high ≥ e: the initial fan gear is recalculated according to the new state. Ccb fluctuates from low to high = (Ccb of the last period-Ccb of the current period) / Ccb of the last period, where e is the fluctuation parameter of the ratio; if the initial fan gear calculated under the current condition ≥ the current fan operating gear, 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 fan gear calculated under the current condition < 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. The preferred value of d is 20%, and the protection range is 15-50%.

[0104] In this embodiment, when the load of the indoor unit changes little, the fan gear is stabilized through conventional adjustment. When the load of the indoor unit changes greatly, the feedforward adjustment method is increased or decreased at the beginning of the load change. The fan gear is recalculated to avoid the sudden change of the system pressure in the fan control process.

[0105] In addition, the embodiment of the present application also provides a storage medium, wherein the storage medium stores a heat recovery air conditioner control program, and the heat recovery air conditioner control program is executed by a processor to realize the steps of the heat recovery air conditioner control method as described above.

[0106] Since the storage medium adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0107] Reference Figure 6 , Figure 6 is a structure block diagram of the first embodiment of the heat recovery air conditioner control device of the present application.

[0108] As Figure 6 shown, the heat recovery air conditioner control device provided by the embodiment of the present application comprises:

[0109] A data acquisition module 10 is configured to acquire the outdoor environment temperature and the target gear of the compressor in the outdoor unit when the heat recovery air conditioner is in a starting state.

[0110] In the embodiment, the execution subject of the embodiment can be the heat recovery air conditioner, which has functions of data processing, data communication, program running, etc. Of course, it can also be other devices with similar functions, which are not limited in the embodiment. For the convenience of description, the heat recovery air conditioner is taken as an example for description.

[0111] It should be noted that, as Figure 3 Fig. 1 is a structural schematic diagram of the heat recovery air conditioner in the embodiment, in the scheme of the embodiment, when it is detected that the heat recovery air conditioner is starting, and in the partial heat recovery mode, that is, the outdoor unit and the water tank are used as condensing devices, and the air conditioner indoor unit is used as an evaporating device. Part of the heat is dissipated to the environment.

[0112] It should be understood that the heat recovery air conditioner is an air conditioner that can simultaneously meet the long-regulation hot water and air conditioning refrigeration or heating. There are two operation modes of each component running alone and the same scene, and the same scene also has partial heat recovery and full heat recovery. When the refrigeration and hot water demand are started at the same time, the heat recovery air conditioner can reduce the influence on the outdoor unit heat exchange, and in the partial heat recovery mode, there are two cold condensing devices, and the outdoor unit heat exchange demand is small, at this time, the fan control is optimized, and the operation cost can be reduced.

[0113] In specific implementation, the outdoor environment temperature refers to the environment temperature detected by the outdoor unit part, and then the target gear of the compressor of the outdoor unit is obtained, wherein the target gear refers to the initial running gear of the heat recovery air conditioner determined according to the energy demand of the indoor unit and the energy demand of the water tank when starting.

[0114] The initialization module 20 is configured to control the fan of the outdoor unit to perform initial running according to the outdoor environment temperature and the target gear.

[0115] It should be noted that the initial running refers to that before the process of real-time adjustment of the gear and frequency of the fan, the fan is first controlled to perform initial starting state according to the outdoor environment temperature and the target gear according to the starting process of the heat recovery air conditioner.

[0116] Further, in order to accurately perform the initial running, the temperature interval of the outdoor environment temperature is first determined according to the outdoor environment temperature, that is, the corresponding temperature interval is determined according to the value range of the outdoor environment temperature.

[0117] It should be understood that after the target temperature interval is determined, the fan frequency corresponding to the target gear is first determined according to the target gear, then the frequency ratio is obtained by dividing the fan frequency corresponding to the target gear by the preset maximum frequency, and finally the initial frequency is determined by querying the initial wind gear table according to the target temperature interval and the frequency ratio, and finally the fan of the outdoor unit is controlled to perform initial running according to the initial frequency.

[0118] In a specific implementation, the fan gear is defined as X, wherein the conversion relationship between the fan speed (unit: r / min) and the fan frequency is: fan speed = a*X, a is preferably 50, and the protection range is 5-100 rpm. At any time when the fan is started from 0 revolutions, if the target gear X converts a speed lower than b, the target frequency b is run at b speed for 10s.

[0119] It should be noted that the fan starts to enter the initial fan gear according to the ambient temperature and is maintained for 2 min. Specifically, the initial fan gear table is shown in Table 1.

[0120] wherein x1 < x2 < x3 < x4 < x5 < x6 < x7, and the maximum and minimum speeds of different outdoor units are selected. The preferred value cannot be given. Toa1 < Toa2 < Toa3 < Toa4 < Toa5 < Toa6, Toa1 is preferably 5°C, and the protection range is 0-10°C; Toa2 is preferably 15°C, and the protection range is 5-20°C; Toa3 is preferably 20°C, and the protection range is 10-30°C; Toa4 is preferably 30°C, and the protection range is 20-38°C; Toa5 is preferably 40°C, and the protection range is 30-45°C; Toa6 is preferably 45°C, and the protection range is 40-50°C. T4CoolMaxFre4 is the ratio of the current target frequency to the maximum frequency operated at the current T4 temperature. a1 < a2 < a3 < a4 < a1 is preferably 20%, and the protection range is 10-30%; a2 is preferably 40%, and the protection range is 30-55%; a3 is preferably 60%, and the protection range is 45-70%; a4 is preferably 80%, and the protection range is 60-90%.

[0121] In this way, the process of initializing the fan based on the initial fan gear table is realized, and the fan frequency optimal for the ambient temperature can be selected for operation.

[0122] Further, in order to exit in time after initialization and run the next process, after step S10, a judgment step is also performed, that is, when the fan of the outdoor unit is initialized to run for a preset time threshold, or the high-pressure temperature and the initialization running time meet the initialization exit condition, the initialization running is automatically ended and exited.

[0123] It should be understood that the condition for exiting the initialization is that the heating mode oil return stage initialization time reaches 20s, wherein the 20s is the preset time threshold, which can also be any other arbitrarily set time threshold, and the embodiment does not limit this. Another condition is that the initialization exit condition is met: the refrigeration operation initialization running time reaches 2min or

Tc≥56℃ and initialization time≥20s

[0124] The gear adjustment module 30 is configured to obtain the pressure information of the outdoor unit and the water tank temperature after the initialization running of the fan of the outdoor unit ends, and adjust the fan gear of the fan of the outdoor unit according to the pressure information and the water tank temperature.

[0125] In a specific implementation, after the initialization running of the fan ends, the pressure information of the outdoor unit and the water tank temperature corresponding to the indoor water tank are obtained, so that the running state of the heat recovery air conditioner can be grasped at any time according to the pressure information and the water tank temperature, and the fan frequency can be adjusted in real time, thereby saving the cost on the premise of ensuring the running effect of the heat recovery air conditioner.

[0126] The embodiment realizes that the fan is initialized to run according to the outdoor environment 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 running of the heat recovery air conditioner. In the partial heat recovery mode, there are two cold condensing devices, so the heat exchange demand of the outdoor unit is small. At this time, the fan gear is adjusted in real time based on the information of the water tank and the outdoor unit to optimize the fan control, which can reduce the running cost.

[0127] It should be understood that the above is only for illustration, and does not constitute any limitation on the technical solutions of the present application. In specific applications, those skilled in the art can set it up according to the needs, and the present application does not limit this.

[0128] It should be noted that the above-described workflow is only illustrative and does not limit the scope of protection of the present application. In actual application, those skilled in the art can select part or all of them to achieve the purpose of the embodiment scheme according to the actual needs, which is not limited here.

[0129] In addition, technical details not described in detail in the embodiment can be referred to the heat recovery air conditioner control method provided by any embodiment of the present application, which will not be described here.

[0130] Moreover, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including" "comprising" or "having" and variations thereof herein is intended to encompass the presence of successor, equivalent, and similar terms, to the extent not doing so would adversely render teachings of the present application ambiguous. The use of the term "including" and "comprising" and variations thereof are intended to be broad and encompass the terms "consisting of" and "consisting essentially of" to the extent not doing so would materially alter the meaning of the description herein.

[0131] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0132] Those skilled in the art can clearly understand the above-mentioned embodiment method from the description of the above embodiments, which can be realized by software and necessary general hardware platform, of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application 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, an optical disk), and includes a plurality of instructions for making a terminal device (which can be a mobile phone, a computer, a server, or a network device) execute the method described in each embodiment of the present application.

[0133] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the specification and drawings of the present application, is also included in the patent protection scope of the present application.

Claims

1. A control method for a heat recovery air conditioner, characterized in that, The heat recovery air conditioner control method is used in a heat recovery air conditioner, which includes an indoor water tank, an outdoor unit, and multiple indoor units. The outdoor unit is connected to the indoor water tank, and each indoor unit is connected to the outdoor unit. The heat recovery air conditioner control method includes: When the heat recovery air conditioner is in the start-up state, the outdoor ambient temperature and the target speed of the compressor in the outdoor unit are obtained; The outdoor unit's fan is initialized based on the outdoor ambient temperature and the target gear setting. After the outdoor unit's fan initialization operation is completed, the pressure information of the outdoor unit and the water temperature of the indoor water tank are obtained, and the fan speed of the outdoor unit is adjusted according to the pressure information and the water temperature.

2. The heat recovery air conditioner control method as described in claim 1, characterized in that, The step of controlling the outdoor unit's fan to initialize operation based on the outdoor ambient temperature and the target gear position includes: Determine the target temperature range within which the outdoor ambient temperature falls; The frequency ratio is determined based on the target gear and the preset maximum frequency. The initial frequency is obtained by consulting the initial windshield lookup table based on the target temperature range and the frequency ratio. The outdoor unit's fan is controlled to initialize and run at the initialization frequency.

3. The heat recovery air conditioner control method as described in claim 1, characterized in that, After the initialization operation of the outdoor unit's fan is controlled according to the outdoor ambient temperature and the target gear, the method further includes: When the initialization operation time of the outdoor unit's fan reaches a preset time threshold, the initialization operation ends. or, When the high-pressure temperature and initialization running time of the outdoor unit meet the initialization exit conditions, the initialization operation ends.

4. The heat recovery air conditioner control method as described in claim 1, characterized in that, The step of adjusting the fan speed of the outdoor unit based on the pressure information and the water tank temperature includes: Determine the high-pressure saturation temperature based on the pressure information; Determine the first temperature threshold and the second temperature threshold based on the water tank temperature; The fan speed 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 as described in claim 4, characterized in that, The step of adjusting the fan speed of the outdoor unit based on the high-pressure saturation temperature, the first temperature threshold, and the second temperature threshold includes: A temperature comparison range is determined based on the first temperature threshold and the second temperature threshold; The high-pressure saturation temperature is compared with the temperature comparison range, and the windshield is adjusted based on the comparison result. Adjust the fan speed of the outdoor unit according to the change in the windshield.

6. The heat recovery air conditioner control method according to any one of claims 1 to 5, characterized in that, After adjusting the fan speed of the outdoor unit based on the pressure information and the water tank temperature, the method further includes: When the indoor unit load changes, obtain the outdoor unit capacity and the number of indoor units with energy requirements; The total energy requirement of the indoor units is determined based on the number of indoor units with energy demand. Adjust the fan speed of the outdoor unit according to the total required capacity of the indoor unit and the capacity of the outdoor unit.

7. The heat recovery air conditioner control method as described in claim 6, characterized in that, The step of adjusting the fan speed of the outdoor unit according to the total required capacity of the indoor unit and the capacity of the outdoor unit includes: The ratio of indoor to outdoor capacity is determined based on the total required capacity of the indoor unit and the capacity of the outdoor unit. Determine the ratio fluctuation parameter based on the internal and external capacity ratio; The fan speed of the outdoor unit is adjusted according to the ratio fluctuation parameter and the preset fluctuation threshold.

8. A control device for a heat recovery air conditioner, characterized in that, The heat recovery air conditioner control device includes: The data acquisition module is used to acquire the outdoor ambient temperature and the target speed of the compressor in the outdoor unit when the heat recovery air conditioner is in the start-up state. An initialization module is used to control the outdoor unit's fan to perform initial operation based on the outdoor ambient temperature and the target gear. The speed adjustment module is used to obtain the pressure information and water tank temperature of the outdoor unit after the initial operation of the outdoor unit's fan is completed, and to adjust the fan speed of the outdoor unit's fan according to the pressure information and the water tank temperature.

9. A heat recovery air conditioner, characterized in that, 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, the heat recovery air conditioner control program being configured to implement the heat recovery air conditioner control method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a heat recovery air conditioner control program, which, when executed by a processor, implements the heat recovery air conditioner control method as described in any one of claims 1 to 7.

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