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 the outdoor environment temperature of the heat recovery air conditioner and the operation frequency ratio of the compressor, and the operation frequency ratio is the ratio of the target frequency of the compressor to the maximum operation frequency; determines the initial fan frequency according to the outdoor environment temperature and the operation frequency ratio; obtains the saturation temperature corresponding to the condensing pressure, and the energy demand information of each indoor unit and the water tank; when the saturation temperature, the energy demand information and the initial fan frequency meet the hot water demand condition, the operation frequency of the fan is adjusted. In this way, the frequency of the fan is adjusted in combination with the outdoor environment temperature and the real-time operation frequency of the compressor during the operation of the heat recovery air conditioner, and the operation frequency of the fan is adjusted in combination with the energy demand change of the water tank and each indoor unit, so that the air conditioner comfort or the heating water efficiency is improved.

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] In the process of heat recovery air conditioner operation in a heating plus hot water mixed mode, fan control is controlled according to the air conditioner heating mode, and only the condenser pipe temperature of the indoor side air conditioner in the heating mode is adjusted. The fan control cannot be efficiently and energy-savingly operated when the air conditioner is heating water.

[0003] In the process of heat recovery air conditioner operation in a heating plus hot water mixed mode, the pressure control is different from that in the heating mode. If the fan control is controlled according to the air conditioner heating mode, the efficiency of heating water is low, and it is difficult to reach the preset high water temperature.

[0004] 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

[0005] 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 problems that the heat recovery air conditioner according to the air conditioner heating mode control will cause low heating water efficiency and difficulty in reaching the preset water temperature.

[0006] To achieve the above-mentioned purpose, the present application provides a heat recovery air conditioner control method, which is applied to a heat recovery air conditioner, the heat recovery air conditioner comprises a water tank, an outdoor unit and a plurality of indoor units, each indoor unit is connected with the outdoor unit, and the water tank is connected with the outdoor unit.

[0007] The heat recovery air conditioner control method comprises:

[0008] Obtaining the outdoor environment temperature of the heat recovery air conditioner and the operating frequency ratio of the compressor, the operating frequency ratio being the ratio of the target frequency of the compressor to the maximum operating frequency;

[0009] Determining an initial fan frequency according to the outdoor environment temperature and the operating frequency ratio;

[0010] Obtaining the saturation temperature corresponding to the condensing pressure, and the energy demand information of each indoor unit and the water tank;

[0011] When the saturation temperature, the energy demand information and the initial fan frequency meet the hot water demand condition, adjusting the operating frequency of the fan.

[0012] Optionally, the initial fan frequency is determined according to the outdoor environment temperature and the operating frequency ratio, comprising:

[0013] comparing the outdoor environment temperature with a temperature comparison threshold, to obtain an environment temperature comparison result;

[0014] comparing the running frequency ratio with a ratio comparison threshold, to obtain a ratio comparison result;

[0015] determining an initial fan frequency according to the environment temperature comparison result and the ratio comparison result.

[0016] Optionally, when the saturation temperature, the energy demand information and the initial fan frequency satisfy a hot water demand condition, adjusting a running frequency of the fan, comprises:

[0017] when the saturation temperature satisfies a frequency control condition, judging whether the energy demand information and the initial fan frequency satisfy a frequency adjustment condition;

[0018] when the energy demand information and the initial fan frequency satisfy the frequency adjustment condition, judging whether the energy demand information satisfies a hot water making condition;

[0019] adjusting the running frequency of the fan according to a judgment result.

[0020] Optionally, when the saturation temperature satisfies the frequency control condition, judging whether the energy demand information and the initial fan frequency satisfy the frequency adjustment condition, comprises:

[0021] when the saturation temperature is greater than or equal to a first temperature threshold, and a fan running time is greater than or equal to a first time threshold, judging whether the initial fan frequency satisfies the frequency control condition;

[0022] or,

[0023] when the fan running time is greater than or equal to a second time threshold, judging whether the initial fan frequency satisfies the frequency control condition.

[0024] Optionally, when the energy demand information and the initial fan frequency satisfy the frequency adjustment condition, judging whether the energy demand information satisfies the hot water making condition, comprises:

[0025] determining an indoor unit energy demand, a water tank energy demand and an outdoor unit capacity according to the energy demand information;

[0026] determining an energy demand ratio according to the indoor unit energy demand, the water tank energy demand and the outdoor unit capacity;

[0027] when the energy demand ratio is greater than or equal to a ratio threshold, and the initial fan frequency is less than a preset fan frequency threshold, judging whether the energy demand information satisfies the hot water making condition.

[0028] Optionally, the adjusting the operation frequency of the fan comprises:

[0029] The original frequency of the fan is obtained, and a first change frequency is determined according to the saturation temperature;

[0030] The operation frequency of the fan is adjusted according to the first change frequency and the original frequency.

[0031] Optionally, before the obtaining the original frequency of the fan and determining the first change frequency according to the saturation temperature, the method further comprises:

[0032] When the heat recovery air conditioner does not have a hot water demand, the outlet pipe temperature of the heat exchanger of the outdoor unit is obtained, and a second change frequency is determined according to the outlet pipe temperature of the heat exchanger;

[0033] The operation frequency of the fan is adjusted according to the second change frequency.

[0034] In addition, to achieve the above-mentioned purpose, the application further provides a heat recovery air conditioner control device, which comprises:

[0035] In addition, to achieve the above-mentioned purpose, the 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, wherein the heat recovery air conditioner control program is configured to implement the heat recovery air conditioner control method as described above.

[0036] In addition, to achieve the above-mentioned purpose, the application further provides a storage medium, which has a heat recovery air conditioner control program stored thereon, wherein the heat recovery air conditioner control program is implemented as the heat recovery air conditioner control method as described above when executed by a processor.

[0037] The application obtains the ratio of the outdoor environment temperature of the heat recovery air conditioner to the operation frequency of the compressor, wherein the operation frequency ratio is the ratio of the target frequency of the compressor to the maximum operation frequency; determines an initial fan frequency according to the outdoor environment temperature and the operation frequency ratio; obtains the saturation temperature corresponding to the condensing pressure, and the energy demand information of each indoor unit and the water tank; and adjusts the operation frequency of the fan when the saturation temperature, the energy demand information, and the initial fan frequency meet the hot water demand condition. In this way, the frequency of the fan is adjusted in combination with the outdoor environment temperature and the real-time operation frequency of the compressor during the operation of the heat recovery air conditioner, and the operation frequency of the fan is adjusted in combination with the energy demand changes of the water tank and each indoor unit, so as to improve the air conditioning comfort or the hot water efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1is a structural schematic view of a heat recovery air conditioner of a hardware running environment related to an embodiment scheme of the present application.

[0039] Figure 2 is a flow schematic view of a heat recovery air conditioner control method first embodiment of the present application.

[0040] Figure 3 is a flow schematic view of a heat recovery air conditioner control method second embodiment of the present application.

[0041] Figure 4 is a flow schematic view of a heat recovery air conditioner control method third embodiment of the present application.

[0042] Figure 5 is a structural block diagram of a heat recovery air conditioner control device first embodiment of the present application.

[0043] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0044] It should be understood that the specific embodiments described herein are intended to be illustrative only and not limiting of the present application.

[0045] Reference Figure 1 , Figure 1 is a structural schematic view of a heat recovery air conditioner of a hardware running environment related to an embodiment scheme of the present application.

[0046] As Figure 1 shown, 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 between the components. The user interface 1003 can include a display, an input unit such as a keyboard, and can also include a standard wired interface, a wireless interface. The network interface 1004 can optionally include a standard wired interface, 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 magnetic disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0047] Those skilled in the art can understand that Figure 1The structure shown in the figure does not constitute a limitation on the heat recovery air conditioner, and can include more or fewer components than shown, or combine certain components, or different component arrangements.

[0048] 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.

[0049] In Figure 1 The network interface 1004 of the heat recovery air conditioner 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 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 application.

[0050] The embodiment of the application provides a heat recovery air conditioner control method, which refers to Figure 2 , Figure 2 The flowchart of a first embodiment of a heat recovery air conditioner control method of the application.

[0051] In this embodiment, the heat recovery air conditioner control method comprises the following steps:

[0052] Step S10: acquiring an outdoor environment temperature of the heat recovery air conditioner and a running frequency ratio of the compressor, the running frequency ratio being a ratio of a target frequency of the compressor to a maximum running frequency.

[0053] In this embodiment, the execution subject of the 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 application does not limit this. For ease of description, the heat recovery air conditioner is taken as an example for description.

[0054] It should be noted that in the scheme of this embodiment, the heat recovery air conditioner adopts a mode of simultaneous heating and heating water, in which mode, the outdoor environment temperature of the outdoor unit of the air conditioner is first collected by a temperature sensor, and then the running frequency ratio of the compressor is acquired. Specifically, the running frequency ratio is a ratio of a target frequency to a maximum running frequency, the fan is started and runs at a preset fan frequency H, and the preset fan frequency H value is defined to be related to the outdoor environment temperature and the target compressor frequency Z of the air conditioner. A is defined as a percentage obtained by dividing the target frequency of the compressor by the maximum running frequency of the compressor, that is, the running frequency ratio.

[0055] Step S20: determining an initial fan frequency according to the outdoor environment temperature and the operation frequency ratio.

[0056] It should be understood that the initial fan frequency refers to the initial operation frequency of the fan set by the heat recovery air conditioner when starting operation.

[0057] Further, in order to accurately determine the initial fan frequency, firstly, the outdoor environment temperature is compared with the temperature comparison threshold value to obtain an environment temperature comparison result, then the operation frequency ratio is compared with the ratio comparison threshold value to obtain another comparison result, and finally the initial fan frequency is set in combination with the environment temperature comparison result and the ratio comparison result.

[0058] In a specific implementation, when the outdoor environment temperature C1 is greater than t1, the A value is greater than 0 and less than A1%, the fan frequency H is H1; the A value is greater than or equal to A1 and less than A2%, the fan frequency H is H2; the A value is greater than or equal to A2 and less than A3%, the fan frequency H is H3; the A value is greater than or equal to A3 and less than A4%, the fan frequency H is H4; and the A value is greater than or equal to A4 and less than A5%, the fan frequency H is H5.

[0059] When the outdoor environment temperature C1 is greater than t2 and less than t1, the A value is greater than 0 and less than A1%, the fan frequency H is H6; the A value is greater than or equal to A1 and less than A2%, the fan frequency H is H7; the A value is greater than or equal to A2 and less than A3%, the fan frequency H is H8; the A value is greater than or equal to A3 and less than A4%, the fan frequency H is H9; and the A value is greater than or equal to A4 and less than A5%, the fan frequency H is H10.

[0060] When the outdoor environment temperature C1 is greater than t3 and less than t2, the A value is greater than 0 and less than A1%, the fan frequency H is H11; the A value is greater than or equal to A1 and less than A2%, the fan frequency H is H12; the A value is greater than or equal to A2 and less than A3%, the fan frequency H is H13; the A value is greater than or equal to A3 and less than A4%, the fan frequency H is H14; and the A value is greater than or equal to A4 and less than A5%, the fan frequency H is H15.

[0061] When the outdoor environment temperature C1 is less than t3, the A value is greater than 0 and less than A1%, the fan frequency H is H16; the A value is greater than or equal to A1 and less than A2%, the fan frequency H is H17; the A value is greater than or equal to A2 and less than A3%, the fan frequency H is H18; the A value is greater than or equal to A3 and less than A4%, the fan frequency H is H19; and the A value is greater than or equal to A4 and less than A5%, the fan frequency H is H20.

[0062] In this way, the initial fan frequency is accurately determined, so that the initial operation frequency of the fan is more in line with the actual situation of the ambient temperature and the compressor frequency.

[0063] Step S30: obtaining a saturated temperature corresponding to the condensing pressure, and energy demand information of each indoor unit and the water tank.

[0064] It should be noted that the saturated temperature refers to the saturated temperature corresponding to the condensing pressure detected by the pressure sensor. The energy demand information of each indoor unit and the water tank refers to the energy demand of each indoor unit for heating and the related information of the water energy demand of the water tank for heating.

[0065] Step S40: adjusting the operation frequency of the fan when the saturated temperature, the energy demand information and the initial fan frequency meet the hot water demand condition.

[0066] It should be understood that the hot water demand condition includes three judgment conditions. First, it is judged whether the saturated temperature meets the frequency control condition. After the saturated temperature meets the frequency control condition, the energy demand information and the initial fan frequency are introduced to judge whether the energy demand information and the initial fan frequency meet the frequency adjustment condition. Under the premise that the frequency adjustment condition is met and the energy demand information meets the heating water condition, the operation frequency of the fan can be adjusted. That is, when the frequency control condition, the frequency adjustment condition and the heating water condition are all met, the operation frequency of the fan can be adjusted.

[0067] In this embodiment, the frequency of the fan is adjusted by combining the outdoor ambient temperature and the real-time operation frequency of the compressor during the operation of the heat recovery air conditioner, and the operation frequency of the fan is adjusted by combining the energy demand changes of the water tank and each indoor unit, so as to improve the air conditioning comfort or the heating water efficiency.

[0068] Reference Figure 3 , Figure 3 The flowchart of the second embodiment of the heat recovery air conditioner control method of the present application is shown.

[0069] Based on the above-mentioned first embodiment, the heat recovery air conditioner control method of the present application comprises the following steps in the step S40:

[0070] Step S401: judging whether the energy demand information and the initial fan frequency meet the frequency adjustment condition when the saturated temperature meets the frequency control condition.

[0071] It should be noted that it is first judged whether the saturated temperature meets the frequency control condition. Specifically, when the saturated temperature meets the frequency control condition, the next step of judging whether the energy demand information and the initial fan frequency meet the frequency adjustment condition is entered.

[0072] Further, in order to accurately determine whether the saturation temperature meets the frequency control condition, if the saturation temperature B corresponding to the condensing pressure detected by the pressure sensor is greater than or equal to t4 and the fan running time T is greater than or equal to T1, the air conditioner fan control enters the judgment of whether the energy demand information and the initial fan frequency meet the frequency adjustment condition; if not, it is determined whether the fan running time T is greater than or equal to T2, if yes, the fan control enters the fourth step control; if not, continue to run according to the fan frequency H, and simultaneously continue to determine whether the saturation temperature meets the frequency control condition, wherein t4 is the first temperature threshold, T1 is the first time threshold, and T2 is the second time threshold.

[0073] Step S402: When the energy demand information and the initial fan frequency meet the frequency adjustment condition, it is determined whether the energy demand information meets the hot water heating condition.

[0074] It should be understood that when the first judgment condition frequency control condition is met, the frequency adjustment condition is determined according to the indoor unit energy demand, the water tank energy demand, the outdoor unit capacity and the initial fan frequency in the energy demand information.

[0075] Further, in order to determine whether the frequency adjustment condition is met, the indoor unit energy demand, the water tank energy demand and the outdoor unit capacity are determined according to the energy demand information, the capacity demand percentage C is defined as the sum of the energy demands of the indoor unit and the water tank divided by the outdoor unit capacity of the air conditioner, the interval time T3 is recorded to calculate the C value, the current C value is defined as C (current), the C value before T3 time is defined as C (before T3), C (change) = C (current) - C (before T3) is defined, and it is determined whether C (change) is greater than or equal to D, wherein C is the energy demand ratio, and D is the ratio threshold. When it is determined that the energy demand ratio is greater than or equal to the ratio threshold, it is determined whether the current fan running H (current) is greater than or equal to the preset fan frequency threshold H; if yes, the current fan running is operated according to the preset fan frequency threshold H, and it is determined whether the energy demand information meets the hot water heating condition after the duration T4; if not, it is determined whether the energy demand information meets the hot water heating condition. When the energy demand ratio is less than the ratio threshold, it is directly determined whether the hot water heating condition is met.

[0076] Step S403: Adjusting the running frequency of the fan according to the judgment result.

[0077] In specific implementation, the judgment result refers to whether there is hot water heating energy demand of the water tank at the current time, and the running frequency adjustment mode of the fan is determined according to whether the hot water heating energy demand exists.

[0078] The embodiment determines the running state and the running parameter of the heat recovery air conditioner through three judgment conditions, so as to accurately determine the adjustment mode of the running frequency of the fan.

[0079] Reference Figure 4 , Figure 4The flowchart of the third embodiment of the heat recovery air conditioner control method.

[0080] Based on the first embodiment, the heat recovery air conditioner control method of the present application comprises the following steps in the step S40:

[0081] Step S41: Obtain the original frequency of the fan, and determine the first change frequency according to the saturation temperature.

[0082] It should be noted that the original frequency of the current fan, that is, the current operating frequency HH1, is obtained first. It is determined whether the current fan operating frequency is H21 frequency. If yes, the fan detection adjustment cycle time is T5; if no, the fan detection adjustment cycle time is T6.

[0083] It should be understood that the fan operating frequency HH=original frequency HH1+first change frequency△H; the current condensing pressure corresponding saturation temperature B is less than or equal to tc1, then△H=tc1+e1-B; the current condensing pressure corresponding saturation temperature B is greater than tc1 and less than or equal to tc2, then△H=e2; the current condensing pressure corresponding saturation temperature B is greater than tc2 and less than or equal to tc3, then△H=(tc3+e3-B)*f; the current condensing pressure corresponding saturation temperature B is greater than tc3, then△H=original frequency HH1*(g-1).

[0084] Step S42: Adjust the operating frequency of the fan according to the first change frequency and the original frequency.

[0085] In specific implementation, after determining the first change frequency, the first change frequency and the original frequency are added to obtain the frequency to which the fan needs to be adjusted, and then the fan is adjusted.

[0086] Further, when there is no heating water demand in the water tank, different calculation methods need to be used to adjust the fan operating frequency. Specifically, the fan operating frequency HH=original frequency HH1+second change frequency△H; the current outdoor heat exchanger outlet pipe temperature I is less than or equal to ti1, then△H=ti1-I; the current outdoor heat exchanger outlet pipe temperature I is greater than ti1 and less than ti2, then△H=j; the current outdoor heat exchanger outlet pipe temperature I is greater than or equal to ti3, then△H=(ti2-B)*k.

[0087] It should be noted that the second change frequency and the original frequency are finally added to obtain the target position to which the fan operating frequency needs to be adjusted.

[0088] In specific implementation, in the process of real-time adjustment of the operating frequency of the fan, it is also necessary to determine in real time whether the condensing pressure corresponding saturation temperature B is greater than or equal to M value, then the fan operating frequency HH=H21+n.

[0089] It should be understood that in the present embodiment and each of the above-described parameters: A1, A2, A3, A4, A5, H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14, H15, H16, H17, H18, H19, H20, H21, t1, t2, t3, t4, T1, T2, T3, T4, T5, T6, D, tc1, tc2, tc3, e1, e2, e3, f, g, ti1, ti2, ti3, j, k are parameters preset in the program, and can be any value.

[0090] The present embodiment makes the adjustment of the frequency of the fan closer to the specific situation of the need by setting the adjustment mode of the frequency of the fan for whether the water tank and the heat recovery air conditioner have the demand for heating water, and guarantees the effect of heating and heating water.

[0091] In addition, the present embodiment further provides a storage medium, and the storage medium has a heat recovery air conditioner control program stored thereon, and the heat recovery air conditioner control program realizes the steps of the heat recovery air conditioner control method as described above when executed by a processor.

[0092] Since the present storage medium adopts all the technical solutions of the above-described embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-described embodiments, which will not be repeated here.

[0093] Reference Figure 5 , Figure 5 is a structural block diagram of the first embodiment of the heat recovery air conditioner control device of the present application.

[0094] As Figure 5 shown, the heat recovery air conditioner control device provided by the present embodiment comprises:

[0095] The data acquisition module 10 is configured to acquire the outdoor environment temperature of the heat recovery air conditioner and a running frequency ratio of the compressor, and the running frequency ratio is a ratio of a target frequency of the compressor to a maximum running frequency.

[0096] In the present embodiment, the execution subject of the present 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 present embodiment does not limit this. For the convenience of description, the present embodiment is described by taking the heat recovery air conditioner as an example.

[0097] It should be noted that in the scheme of the embodiment, the heat recovery air conditioner adopts a mode in which heating and hot water production are simultaneously performed. In this mode, the outdoor environment temperature of the outdoor unit of the air conditioner is first collected by a temperature sensor, and then the operation frequency ratio of the compressor is obtained. Specifically, the operation frequency ratio is the ratio of the target frequency to the maximum operation frequency, the fan is started and operates at a preset fan frequency H, and the preset fan frequency H value is defined in relation to the outdoor environment temperature and the target compressor frequency Z of the air conditioner. A is defined as the percentage of the target frequency of the compressor divided by the maximum operation frequency of the compressor, that is, the operation frequency ratio.

[0098] The frequency calculation module 20 is configured to determine the initial fan frequency according to the outdoor environment temperature and the operation frequency ratio.

[0099] It should be understood that the initial fan frequency refers to the initial operation frequency of the fan set by the heat recovery air conditioner when it starts to operate.

[0100] Further, in order to accurately determine the initial fan frequency, first, the outdoor environment temperature is compared with the temperature comparison threshold to obtain an environment temperature comparison result, then the operation frequency ratio is compared with the ratio comparison threshold to obtain another comparison result, and finally the initial fan frequency is set in combination with the environment temperature comparison result and the ratio comparison result.

[0101] In a specific implementation, when the outdoor environment temperature C1 is greater than t1, the value of A is greater than 0 and less than A1%, the fan frequency H is H1; the value of A is greater than or equal to A1 and less than A2%, the fan frequency H is H2; the value of A is greater than or equal to A2 and less than A3%, the fan frequency H is H3; the value of A is greater than or equal to A3 and less than A4%, the fan frequency H is H4; the value of A is greater than or equal to A4 and less than A5%, the fan frequency H is H5.

[0102] When the outdoor environment temperature C1 is greater than t2 and less than t1, the value of A is greater than 0 and less than A1%, the fan frequency H is H6; the value of A is greater than or equal to A1 and less than A2%, the fan frequency H is H7; the value of A is greater than or equal to A2 and less than A3%, the fan frequency H is H8; the value of A is greater than or equal to A3 and less than A4%, the fan frequency H is H9; the value of A is greater than or equal to A4 and less than A5%, the fan frequency H is H10.

[0103] When the outdoor environment temperature C1 is greater than t3 and less than t2, the value of A is greater than 0 and less than A1%, the fan frequency H is H11; the value of A is greater than or equal to A1 and less than A2%, the fan frequency H is H12; the value of A is greater than or equal to A2 and less than A3%, the fan frequency H is H13; the value of A is greater than or equal to A3 and less than A4%, the fan frequency H is H14; the value of A is greater than or equal to A4 and less than A5%, the fan frequency H is H15.

[0104] When the outdoor environment temperature C1 is less than t3, the value of A is greater than 0 and less than A1%, the frequency H of the fan is H16; the value of A is greater than or equal to A1 and less than A2%, the frequency H of the fan is H17; the value of A is greater than or equal to A2 and less than A3%, the frequency H of the fan is H18; the value of A is greater than or equal to A3 and less than A4%, the frequency H of the fan is H19; the value of A is greater than or equal to A4 and less than A5%, the frequency H of the fan is H20.

[0105] In this way, the initial fan frequency is accurately determined, so that the initial operation frequency of the fan is more in line with the actual situation of the environment temperature and the compressor frequency.

[0106] The information acquisition module 30 is configured to acquire a saturated temperature corresponding to the condensing pressure and energy demand information of each indoor unit and the water tank.

[0107] It should be noted that the saturated temperature refers to the saturated temperature corresponding to the condensing pressure detected by the pressure sensor. The energy demand information of each indoor unit and the water tank refers to the relevant information of the energy demand of each indoor unit for heating and the energy demand of the water tank for heating water.

[0108] The frequency adjustment module 40 is configured to adjust the operation frequency of the fan when the saturated temperature, the energy demand information and the initial fan frequency satisfy the hot water demand condition.

[0109] It should be understood that the hot water demand condition includes three judgment conditions. First, it is judged whether the saturated temperature satisfies the frequency control condition. After the saturated temperature satisfies the frequency control condition, the energy demand information and the initial fan frequency are introduced to judge whether the energy demand information and the initial fan frequency satisfy the frequency adjustment condition. On the premise that the frequency adjustment condition is satisfied and the energy demand information satisfies the heating water condition, the process of adjusting the operation frequency of the fan is entered. That is, when the frequency control condition, the frequency adjustment condition and the heating water condition are all satisfied, the operation frequency of the fan can be adjusted.

[0110] The embodiment adjusts the frequency of the fan by combining the outdoor environment temperature and the real-time operation frequency of the compressor during the operation of the heat recovery air conditioner, and adjusts the operation frequency of the fan by combining the energy demand changes of the water tank and each indoor unit, so as to improve the air conditioning comfort or the heating water efficiency.

[0111] 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 according to the needs, and the present application does not limit it.

[0112] It should be noted that the above-described workflow is merely illustrative and does not limit the scope of protection of the present application. In actual applications, a person skilled in the art can select part or all of the above-described workflow to achieve the purpose of the embodiment according to actual needs, which is not limited herein.

[0113] In addition, technical details not described in detail in the present embodiment can be found in the heat recovery air conditioner control method provided by any embodiment of the present application, which will not be described here.

[0114] In addition, it should be noted that in this document, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or system. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article or system that includes the element.

[0115] The above-mentioned embodiment numbers of the present application are only for description, not representing the advantages and disadvantages of the embodiments.

[0116] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and necessary general hardware platforms, of course, they 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 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, an optical disk) and includes a number of instructions to make a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) execute the methods described in various embodiments of the present application.

[0117] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A heat recovery air conditioner control method, characterized by, The heat recovery air conditioner control method is applied to a heat recovery air conditioner, the heat recovery air conditioner comprising a water tank, an outdoor unit and a plurality of indoor units, each indoor unit being connected with the outdoor unit, and the water tank being connected with the outdoor unit; The heat recovery air conditioner control method comprises: obtaining an outdoor environment temperature of the heat recovery air conditioner and a running frequency ratio of a compressor, the running frequency ratio being a ratio of a target frequency of the compressor to a maximum running frequency; determining an initial fan frequency according to the outdoor environment temperature and the running frequency ratio; obtaining a saturation temperature corresponding to a condensing pressure, and energy demand information of each indoor unit and the water tank; adjusting a running frequency of the fan when the saturation temperature, the energy demand information and the initial fan frequency satisfy a hot water demand condition; the adjusting of the running frequency of the fan when the saturation temperature, the energy demand information and the initial fan frequency satisfy the hot water demand condition comprises: judging whether the energy demand information and the initial fan frequency satisfy a frequency adjustment condition when the saturation temperature satisfies a frequency control condition; judging whether the energy demand information satisfies a hot water heating condition when the energy demand information and the initial fan frequency satisfy the frequency adjustment condition; adjusting the running frequency of the fan according to a judgment result.

2. The heat recovery air conditioner control method according to claim 1, wherein the determining of the initial fan frequency according to the outdoor environment temperature and the running frequency ratio comprises: comparing the outdoor environment temperature with a temperature comparison threshold to obtain an environment temperature comparison result; comparing the running frequency ratio with a ratio comparison threshold to obtain a ratio comparison result; determining the initial fan frequency according to the environment temperature comparison result and the ratio comparison result.

3. The heat recovery air conditioner control method according to claim 1, wherein the judging of whether the energy demand information and the initial fan frequency satisfy the frequency adjustment condition when the saturation temperature satisfies the frequency control condition comprises: judging whether the energy demand information and the initial fan frequency satisfy the frequency adjustment condition when the saturation temperature is greater than or equal to a first temperature threshold and a fan running time is greater than or equal to a first time threshold; or, judging whether the energy demand information and the initial fan frequency satisfy the frequency adjustment condition when the fan running time is greater than or equal to a second time threshold.

4. The heat recovery air conditioner control method of claim 1, wherein, the judging of whether the energy demand information satisfies the hot water heating condition when the energy demand information and the initial fan frequency satisfy the frequency adjustment condition comprises: determining indoor unit energy demand, water tank energy demand and outdoor unit capacity according to the energy demand information; determining an energy demand ratio according to the indoor unit energy demand, the water tank energy demand and the outdoor unit capacity; judging whether the energy demand information satisfies the hot water heating condition when the energy demand ratio is greater than or equal to a ratio threshold and the initial fan frequency is less than a preset fan frequency threshold.

5. The heat recovery air conditioner control method according to claim 1, wherein the adjusting of the running frequency of the fan comprises: obtaining an original frequency of the fan and determining a first change frequency according to the saturation temperature; adjusting the running frequency of the fan according to the first change frequency and the original frequency.

6. The heat recovery air conditioner control method according to claim 5, wherein before the obtaining of the original frequency of the fan and the determining of the first change frequency according to the saturation temperature, the method further comprises: In the absence of a hot water demand, the temperature of the heat exchanger outlet pipe of the outdoor unit is obtained, and a second variable frequency is determined according to the temperature of the heat exchanger outlet pipe; The operating frequency of the fan is adjusted according to the second variable frequency.

7. A heat recovery air conditioner control device, characterized by comprising: The heat recovery air conditioner control device comprises: A data acquisition module is configured to obtain an outdoor environment temperature of the heat recovery air conditioner and a compressor operating frequency ratio, wherein the operating frequency ratio is a ratio of a target frequency of the compressor to a maximum operating frequency; A frequency calculation module is configured to determine an initial fan frequency according to the outdoor environment temperature and the operating frequency ratio; An information acquisition module is configured to obtain a saturated temperature corresponding to a condensing pressure, and energy demand information of each indoor unit and a water tank; A frequency adjustment module is configured to adjust the operating frequency of the fan when the saturated temperature, the energy demand information, and the initial fan frequency satisfy a hot water demand condition; The frequency adjustment module is further configured to determine whether the energy demand information and the initial fan frequency satisfy a frequency adjustment condition when the saturated temperature satisfies a frequency control condition; determine whether the energy demand information satisfies a hot water demand condition when the energy demand information and the initial fan frequency satisfy the frequency adjustment condition; and adjust the operating frequency of the fan according to the determination results.

8. A heat recovery air conditioner characterized by comprising: The heat recovery air conditioner 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 according to any one of claims 1 to 6.

9. A storage medium, characterized by The storage medium stores a heat recovery air conditioner control program, and the heat recovery air conditioner control program is executed by the processor to implement the heat recovery air conditioner control method according to any one of claims 1 to 6.

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