Mute control method and device for multi-split equipment, multi-split equipment and storage medium

Abstract

The invention discloses a muting control method and device for multi-split equipment, the multi-split equipment and a storage medium, and relates to the technical field of multi-split equipment control. In response to a muting control instruction, the current operation mode of the multi-split equipment, water temperature data of a water tank of a heat recovery unit and the current outdoor environment temperature are obtained; determining a target temperature interval where the current outdoor environment temperature is located based on the current operation mode and the current outdoor environment temperature; and at least one of a heat recovery unit water tank, an outdoor unit and a compressor is controlled according to at least one of the water temperature data, the current operation mode and the target temperature interval, so that mute control over the multi-split equipment is achieved. By controlling at least one of the water tank of the heat recovery unit, the outdoor unit, the fan rotating speed of the outdoor unit and the compressor, the problem of neighborhood complaints caused by noise of the outdoor unit of the heat recovery air conditioner is effectively solved, and the user experience and the refrigerating and heating effect are improved on the premise that it is guaranteed that the noise of the outdoor unit does not disturb residents.

Description

Technical Field

[0001] The present application relates to the technical field of multi-connected unit device control, and particularly to a silent control method, device, multi-connected unit device and storage medium for multi-connected unit devices. Background Art

[0002] With the increasing popularity of air conditioner installation and the limited reserved air conditioner installation positions in buildings, the problem of outdoor unit noise during the use of air conditioners has become increasingly prominent, affecting the living and life feelings of neighbors and causing neighborhood complaints and contradictions. Currently, there are more and more multi-connected unit air conditioners equipped with terminals. The user's usage scenarios can be equipped with air conditioner indoor unit terminals and water tanks. This heat pump system can not only provide air conditioning services for different rooms, but also provide domestic hot water services. Specifically, one outdoor unit is paired with multiple air conditioner indoor units and a hydraulic module terminal. The hydraulic module terminal is connected to an external disk water tank. The system provides air conditioning services through the air conditioner indoor unit and hot water services through the water tank.

[0003] The silent function of ordinary one-to-many devices can achieve silent cooling and heating, but when the air conditioner is in the cooling or heating mode or the water tank is in the domestic hot water heating mode, it is impossible to ensure the domestic hot water heating effect while being silent. Summary of the Invention

[0004] The main purpose of the present application is to provide a silent control method, device, multi-connected unit device and storage medium for multi-connected unit devices, aiming to solve the technical problem that the current one-to-many multi-connected unit devices cannot ensure the domestic hot water heating effect while performing silent control.

[0005] To achieve the above object, the present application proposes a silent control method for a multi-connected unit device. The multi-connected unit device includes: a heat recovery unit water tank, an outdoor unit, an electronic expansion valve, and an indoor unit group that are connected in sequence to form a loop. The indoor unit group includes multiple indoor units, and the electronic expansion valve includes a main electronic expansion valve;

[0006] The silent control method for the multi-connected unit device includes:

[0007] In response to a silent control instruction, obtain the current operating mode of the multi-connected unit device, the water temperature data of the heat recovery unit water tank, and the current outdoor ambient temperature;

[0008] Based on the current operating mode and the current outdoor ambient temperature, determine the target temperature range where the current outdoor ambient temperature is located;

[0009] Control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range to achieve silent control of the multi-connected unit device.

[0010] In one embodiment, the step of controlling at least one of the water tank of the heat recovery unit, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range includes:

[0011] When the current operating mode is the first mode of air conditioner refrigeration and hot water production in the water tank of the heat recovery unit, obtain the first mode operating time of operating in the first mode;

[0012] When the first mode operating time is greater than or equal to the first preset operating time, obtain the water temperature at the lower part of the water tank according to the water temperature data, and obtain the saturation temperature value corresponding to the high pressure;

[0013] When the water temperature difference between the water temperature at the lower part of the water tank and the saturation temperature value is greater than the preset water temperature difference or the water temperature difference is less than or equal to the preset water temperature difference but the duration is less than the preset time threshold, obtain the frequency limit value and the fan speed limit value corresponding to the target temperature range;

[0014] Control the operating frequency of the compressor and the fan speed of the outdoor unit respectively through the frequency limit value and the fan speed limit value.

[0015] In one embodiment, the step of controlling the operating frequency of the compressor and the fan speed of the outdoor unit respectively through the frequency limit value and the fan speed limit value includes:

[0016] Obtain the maximum refrigeration operating frequency of the compressor;

[0017] Determine the frequency limit range according to the frequency limit value, and determine the speed limit range according to the fan speed limit value;

[0018] Calculate the first target frequency control range through the maximum refrigeration operating frequency and the frequency limit range;

[0019] Control the operating frequency of the compressor to operate within the first target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

[0020] In one embodiment, the step of controlling at least one of the water tank of the heat recovery unit, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range includes:

[0021] When the current operating mode is the second mode of air conditioner heating and hot water production in the water tank of the heat recovery unit, obtain the mode priority;

[0022] Control at least one of the water tank of the heat recovery unit, the outdoor unit, and the compressor according to at least one of the mode priority, the water temperature data, and the target temperature range.

[0023] In one embodiment, the step of controlling at least one of the water tank of the heat recovery unit, the outdoor unit, and the compressor according to at least one of the mode priority, the water temperature data, and the target temperature range includes:

[0024] Obtain the current water temperature according to the water temperature data;

[0025] When the current water temperature is less than the preset water temperature threshold, obtain the frequency limit value and the fan speed limit value corresponding to the target temperature range;

[0026] Control the operating frequency of the compressor and the fan speed of the outdoor unit respectively according to the frequency limit value and the fan speed limit value through the mode priority.

[0027] In one embodiment, the step of controlling the operating frequency of the compressor and the fan speed of the outdoor unit respectively according to the frequency limit value and the fan speed limit value through the mode priority includes:

[0028] When the mode priority is air conditioner priority, obtain the maximum heating operating frequency of the compressor;

[0029] Determine the frequency limit range according to the frequency limit value, and determine the speed limit range according to the fan speed limit value;

[0030] Calculate the second target frequency control range through the maximum heating operating frequency and the frequency limit range;

[0031] Control the operating frequency of the compressor to operate within the second target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

[0032] In one embodiment, the step of controlling the operating frequency of the compressor and the fan speed of the outdoor unit respectively according to the frequency limit value and the fan speed limit value through the mode priority includes:

[0033] When the mode priority is hot water priority, obtain the maximum hot water heating operating frequency of the compressor;

[0034] Determine the frequency limit range according to the frequency limit value, and determine the speed limit range according to the fan speed limit value;

[0035] Calculate a third target frequency control range based on the maximum frequency of the hot water production operation and the frequency limit range;

[0036] Control the operating frequency of the compressor to operate within the third target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

[0037] In one embodiment, after the step of obtaining the current water temperature according to the water temperature data, the method further includes:

[0038] Obtain the water temperature at the lower part of the water tank according to the water temperature data, and obtain the saturation temperature value corresponding to the high pressure;

[0039] When the current water temperature is greater than or equal to a preset water temperature threshold, control the heat pump to turn on simultaneously for heating and hot water production;

[0040] In the case where the heat pump is turned on simultaneously, obtain the operation time of the second mode operating in the second mode;

[0041] When the operation time of the second mode is greater than or equal to a second preset operation time, the water temperature difference between the water temperature at the lower part of the water tank and the saturation temperature value is less than or equal to a preset water temperature difference, and the duration is greater than or equal to a preset time threshold, control the outdoor unit to switch to the heating mode, and control the electric heating of the heat recovery unit water tank to be turned on.

[0042] In one embodiment, the step of determining the target temperature range where the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature includes:

[0043] Obtain the historical outdoor ambient temperature within a preset time period, and determine the current change trend of the outdoor ambient temperature according to the historical outdoor ambient temperature and the current outdoor ambient temperature;

[0044] Determine a plurality of temperature ranges corresponding to the current operating mode;

[0045] Determine the target temperature range where the current outdoor ambient temperature is located from the plurality of temperature ranges according to the current change trend and the current outdoor ambient temperature.

[0046] In addition, to achieve the above object, the present application also proposes a mute control device for a multi-connected unit device, and the mute control device for the multi-connected unit device includes:

[0047] An acquisition module, configured to obtain the current operating mode of the multi-connected unit device, the water temperature data of the heat recovery unit water tank, and the current outdoor ambient temperature in response to a mute control instruction;

[0048] A determination module, configured to determine the target temperature range where the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature;

[0049] A control module, configured to control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range, so as to achieve silent control of the multi-connected unit device.

[0050] In addition, to achieve the above object, the present application also provides a multi-connected unit device, which includes: a heat recovery unit water tank, an outdoor unit, an electronic expansion valve, and an indoor unit that are connected in sequence to form a loop. The indoor unit includes a plurality of indoor units, and the electronic expansion valve includes a main electronic expansion valve;

[0051] The multi-connected unit device further includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. The computer program is configured to implement the steps of the silent control method of the multi-connected unit device as described above.

[0052] In addition, to achieve the above object, the present application also provides a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium, and when the computer program is executed by a processor, it implements the steps of the silent control method of the multi-connected unit device as described above.

[0053] In addition, to achieve the above object, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the steps of the silent control method of the multi-connected unit device as described above.

[0054] One or more technical solutions proposed by the present application, in response to a silent control instruction, obtain the current operating mode of the multi-connected unit device, the water temperature data of the heat recovery unit water tank, and the current outdoor ambient temperature; determine the target temperature range where the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature; control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range, so as to achieve silent control of the multi-connected unit device. By controlling at least one of the heat recovery unit water tank, the outdoor unit, the fan speed of the outdoor unit, and the compressor, the problem of neighborhood complaints caused by the noise of the outdoor unit of the heat recovery air conditioner is effectively improved, and on the premise of ensuring that the noise of the outdoor unit does not disturb the residents, the user experience and the refrigeration and hot water supply effects are improved. Description of the Drawings

[0055] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments that conform to the present application, and are used together with the specification to explain the principles of the present application.

[0056] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0057] Figure 1 It is a schematic flow chart provided for the first embodiment of the silent control method of the multi-connected unit device of the present application;

[0058] Figure 2 It is a schematic structural diagram of the multi-connected unit device of the present application;

[0059] Figure 3 It is another schematic structural diagram of the multi-connected unit device of the present application;

[0060] Figure 4 It is a schematic diagram of multiple temperature ranges obtained by dividing according to the outdoor ambient temperature corresponding to the first mode of the air conditioner for refrigeration and the hot water tank of the heat recovery unit for making hot water in an embodiment of the silent control method of the multi-connected unit device of the present application;

[0061] Figure 5 It is a schematic diagram of multiple temperature ranges obtained by dividing according to the outdoor ambient temperature corresponding to the second mode of the air conditioner for heating and the hot water tank of the heat recovery unit for making hot water in an embodiment of the silent control method of the multi-connected unit device of the present application;

[0062] Figure 6 It is a schematic flow chart provided for the second embodiment of the silent control method of the multi-connected unit device of the present application;

[0063] Figures 7a - 7c It is a schematic circuit structure diagram of the first mode of the air conditioner for refrigeration and the hot water tank of the heat recovery unit for making hot water in an embodiment of the silent control method of the multi-connected unit device of the present application;

[0064] Figures 8a - 8c It is another schematic circuit structure diagram of the first mode of the air conditioner for refrigeration and the hot water tank of the heat recovery unit for making hot water in an embodiment of the silent control method of the multi-connected unit device of the present application;

[0065] Figure 9 It is a schematic flow chart provided for the third embodiment of the silent control method of the multi-connected unit device of the present application;

[0066] Figures 10a - 10b It is a schematic circuit structure diagram of the second mode of the air conditioner for heating and the hot water tank of the heat recovery unit for making hot water with air conditioner priority in an embodiment of the silent control method of the multi-connected unit device of the present application;

[0067] Figures 11a - 11bAnother circuit structure diagram of the second mode in which the air conditioner heats up, the heat recovery unit water tank makes hot water, and the air conditioner has priority, provided by an embodiment of the silent control method of the multi-connected device of the present application;

[0068] Figures 12a - 12b Circuit structure diagram of the second mode in which the air conditioner heats up, the heat recovery unit water tank makes hot water, and the hot water has priority, provided by an embodiment of the silent control method of the multi-connected device of the present application;

[0069] Figures 13a - 13b Another circuit structure diagram of the second mode in which the air conditioner heats up, the heat recovery unit water tank makes hot water, and the hot water has priority, provided by an embodiment of the silent control method of the multi-connected device of the present application;

[0070] Figure 14 Module structure diagram of the silent control device of the multi-connected device in the embodiment of the present application.

[0071] Explanation of the reference numerals in the drawings:

[0072] Heat recovery unit water tank 10, three-way valve 20, outdoor unit 30, electronic expansion valve 40, indoor unit 50, compressor 60, four-way valve 70;

[0073] First three-way valve 201, second three-way valve 202, third three-way valve 203;

[0074] Main electronic expansion valve 401, first electronic expansion valve 402, second electronic expansion valve 403, third electronic expansion valve 404, fourth electronic expansion valve 405, first solenoid valve SV1, second solenoid valve SV2;

[0075] First indoor unit 501, second indoor unit 502, third indoor unit 503.

[0076] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0077] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0078] In order to better understand the technical solutions of the present application, the following will be described in detail in conjunction with the drawings in the specification and the specific implementation manners.

[0079] The main solution of the embodiment of the present application is: in response to a mute control instruction, obtain the current operating mode of the multi-connected device, the water temperature data of the water tank of the heat recovery unit, and the current outdoor ambient temperature; determine the target temperature range where the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature; control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range to achieve mute control of the multi-connected device.

[0080] Since the mute function of ordinary one-to-many devices in the prior art can achieve cooling and heating muting, but when the air conditioner is in cooling or heating and the water tank is in the heating mode, it is impossible to ensure the hot water production effect while muting.

[0081] The present application provides a solution, mainly a control method for the mute function of the outdoor unit in the cooling + hot water production mode and the heating + hot water production mode, to achieve the mute function of the outdoor unit, improve the user's noise experience, and ensure the user's cooling demand. Through the comprehensive control of the coupled indoor unit, outdoor unit, compressor, and water tank, intelligent optimization control of outdoor unit mute noise reduction and cooling or heating and hot water production effect is achieved.

[0082] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, a multi-connected device, etc. that can implement the above functions. Hereinafter, the multi-connected device will be taken as an example to illustrate this embodiment and the following embodiments.

[0083] Based on this, the embodiment of the present application provides a mute control method for a multi-connected device, referring to Figure 1 , Figure 1 is a schematic flowchart of the first embodiment of the mute control method for the multi-connected device of the present application.

[0084] In this embodiment, the mute control method for the multi-connected device is applied to a multi-connected device, as Figure 2 shown, Figure 2It is a structural schematic diagram of a multi-connected unit. The multi-connected unit mainly consists of a heat recovery unit water tank 10, a three-way valve 20, an outdoor unit 30, an electronic expansion valve 40, and an indoor unit 50 that are connected in sequence to form a loop. The electronic expansion valve 40 includes a main electronic expansion valve 401, and the three-way valve 20 is also connected to a compressor 60. A high-pressure sensor and three three-way valves are connected in series on the exhaust pipe of the compressor 60. The three-way valve 20 includes a first three-way valve 201, a second three-way valve 202, and a third three-way valve 203. The first three-way valve 201, the second three-way valve 202, and the third three-way valve 203 are all connected to the outdoor unit 30 and the compressor 60. The electronic expansion valve 40 further includes a first electronic expansion valve 402, a second electronic expansion valve 403, a third electronic expansion valve 404, and a fourth electronic expansion valve 405. The indoor unit 50 includes a first indoor unit 501, a second indoor unit 502, and a third indoor unit 503. The first ends of the first electronic expansion valve 402, the second electronic expansion valve 403, the third electronic expansion valve 404, and the fourth electronic expansion valve 405 are all connected to the main electronic expansion valve 401. The second end of the first electronic expansion valve 402 is connected to the first indoor unit 501. The second end of the second electronic expansion valve 403 is connected to the second indoor unit 502. The second end of the third electronic expansion valve 404 is connected to the third indoor unit 503. The second end of the fourth electronic expansion valve 405 is connected to the heat recovery unit water tank 10. Temperature sensors are provided at the outlets or inlets of each indoor unit and the outdoor unit 30, and the temperature data of the indoor unit and the outdoor unit can be collected. Stop valves are provided between each indoor unit and the corresponding electronic expansion valve 40, and stop valves are also provided between each indoor unit and the corresponding three-way valve 20 and between the heat recovery unit water tank 10 and the corresponding three-way valve 20. The first three-way valve 201, the second three-way valve 202, and the third three-way valve 203 can be conducted in two ways. The first three-way valve 201 can be conducted in two ways: D→C and C→S. The second three-way valve 202 and the third three-way valve 203 can be conducted in two ways: D→E and E→D. The D interface of the first three-way valve 201 is connected to the exhaust, the C interface is connected to the outdoor unit heat exchanger, and the S is connected to the compressor suction. The D interface of the second three-way valve 202 is connected to the exhaust, the E interface is connected to the indoor unit heat exchanger, and the S is connected to the compressor suction.

[0085] As Figure 3 shown, Figure 3Another structural schematic diagram of a multi-connected unit device. The multi-connected unit device mainly consists of a heat recovery unit water tank 10, a four-way valve 70, an outdoor unit 30, an electronic expansion valve 40, and an indoor unit unit 50 that are connected in sequence to form a loop. The four-way valve 70 is also connected to a compressor 60. A high-pressure sensor is connected in series on the exhaust pipe of the compressor 60, and then it is divided into two paths. One path is connected in series with a first solenoid valve SV1 and then connected to the D port of the four-way valve 70; the C of the four-way valve 70 is connected to the outdoor unit 30, and the S port of the four-way valve 70 is connected to the suction of the compressor 60; the E port of the four-way valve 70 is connected to the indoor unit unit 50. The other path of the main circuit is connected in series with a second solenoid valve SV2 and then connected to the heat recovery unit water tank 10. The water tank outlet of the heat recovery unit water tank 10 is connected to the electronic expansion valve, and then it converges with the outlet of the condenser through the main electronic expansion valve 401, and then is connected to the first electronic expansion valve 402, the second electronic expansion valve 403, and the third electronic expansion valve 404 corresponding to N - 1 indoor units, and then flows through the evaporator of the indoor unit, and finally converges back to the E port of the four-way valve 70.

[0086] In this embodiment, the silent control method of the multi-connected unit device includes steps S10 to S30:

[0087] Step S10: In response to a silent control instruction, obtain the current operating mode of the multi-connected unit device, the water temperature data of the heat recovery unit water tank, and the current outdoor ambient temperature.

[0088] It should be noted that this embodiment mainly controls the silent function of the outdoor unit of the multi-connected unit device in the cooling + hot water heating mode and the heating + hot water heating mode. Cooling means the air conditioner cools, heating means the air conditioner heats, and the hot water heating mode means the hot water heating mode of the heat recovery unit water tank.

[0089] It should be noted that the multi-connected unit device is a one-to-N device. For example, one-to-four, that is, one outdoor unit and four indoor units. At this time, the heat recovery unit water tank acts as one indoor unit. It should be noted that the multi-connected unit device can include 5 large modes, namely cooling, heating, hot water heating, cooling + hot water heating, and heating + hot water heating modes. Among them, the cooling + hot water heating mode has 3 small modes, namely the full recovery mode 1 of the cooling + hot water heating mode, the full recovery mode 2 of the cooling + hot water heating mode, and the partial recovery mode of the cooling + hot water heating mode; the heating + hot water heating is divided into two priorities, air conditioner priority and hot water priority. In the case of air conditioner priority, when the water temperature is low, the heat pump is used for heating and the electric heater is used for hot water heating. When the water temperature is high, the heat pump heats and produces hot water at the same time; in the case of hot water priority, when the water temperature is low, the heat pump is used for hot water heating and the air conditioner is in standby. When the water temperature is high, the heat pump heats and produces hot water at the same time.

[0090] In the specific implementation, the mute control command is initiated by the user. When any indoor unit in the indoor unit group receives this command, the outdoor unit of the air conditioner can be controlled to enter the mute function. However, in order to ensure the hot water making effect of the water heater, the water tank of the heat recovery unit also needs to be controlled accordingly.

[0091] The mute function is triggered by the indoor unit. The general principle is:

[0092] 1. When there is no master indoor unit, any indoor unit that receives a mute command can put the unit into mute mode; any indoor unit that receives a cancel mute command can make the unit exit the mute mode;

[0093] 2. When there is a master indoor unit, if the master indoor unit receives a mute command to put the unit into the mute function, the unit can only exit the mute function when the master indoor unit sends a command to cancel the mute function.

[0094] 3. The mute function can be removed by power off or shutdown;

[0095] 4. In order to ensure the air conditioning or hot water effect, it takes a while for the outdoor unit to start processing the command after the unit receives the mute function, and the indoor unit of the air conditioner responds immediately and operates the wind shield and air guide plate.

[0096] In this embodiment, the current operating mode of the multi-split device includes cooling + hot water making mode and heating + hot water making mode. The water temperature data of the water tank of the heat recovery unit includes the current water temperature of the water tank and the water temperature under the water tank. The water temperature under the water tank can be detected by a temperature sensing package arranged at the bottom of the water tank. The current outdoor ambient temperature T4 can be obtained in real time by a temperature sensor arranged outdoors.

[0097] Step S20: determining a target temperature interval of the current outdoor ambient temperature based on the current operating mode and the current outdoor ambient temperature.

[0098] It should be noted that the target temperature range is the temperature range of the outdoor ambient temperature determined according to the current operating mode and the current outdoor ambient temperature. It can be divided into multiple temperature ranges in advance, and the specific temperature range, i.e., the target temperature range, is selected according to the current outdoor ambient temperature detected.

[0099] In different operating modes, different temperature ranges can be set, such as Figure 4 As shown, Figure 4Schematic diagram of multiple temperature ranges divided according to the outdoor ambient temperature corresponding to the first mode of heating water in the water tank of an air conditioner refrigeration and heat recovery unit. For example, it is divided into 3 temperature ranges, and the number of temperature ranges can be adjusted according to the unit design requirements, including range A1, range B1, and range C1. According to different change trends of the outdoor ambient temperature, it is divided into an upward trend and a downward trend. The temperature ranges corresponding to the outdoor ambient temperature with an upward trend are determined by being greater than or equal to, and the temperature ranges corresponding to the outdoor ambient temperature with a downward trend are determined by being less than. If the change trend of the outdoor ambient temperature is an upward trend, when the current outdoor ambient temperature T4 is greater than or equal to T4_COOL_OUTQ1, it is in range A1. When the current outdoor ambient temperature is greater than or equal to T4_COOL_OUTQ2 and less than T4_COOL_OUTQ1, the range it is in is range B1. When the current outdoor ambient temperature T4 is less than T4_COOL_OUTQ2, the range it is in is range C1. If the change trend of the outdoor ambient temperature is a downward trend, when the current outdoor ambient temperature T4 is less than T4_COOL_OUTQ2 - t, it is in range C1. When the current outdoor ambient temperature is greater than or equal to T4_COOL_OUTQ2 - t and less than T4_COOL_OUTQ1 - t, the range it is in is range B1. When the current outdoor ambient temperature T4 is greater than or equal to T4_COOL_OUTQ1 - t, the range it is in is range A1. In specific implementation, t is the dead band temperature, generally taking 1 - 2 °C. Specifically, T4_COOL_OUTQ1 > T4_COOL_OUTQ1 - t > T4_COOL_OUTQ2 > T4_COOL_OUTQ2 - t.

[0100] The recommended value of T4_COOL_OUTQ1 is 40 °C, and the range is 35 - 45 °C. The recommended value of T4_COOL_OUTQ2 is 30 °C, and the range is 25 - 32 °C. For the downward range, a dead band of 2 °C is subtracted from the above temperatures, that is, t = 2.

[0101] As Figure 5 shown, Figure 5Schematic diagram of multiple temperature ranges obtained by dividing according to the outdoor ambient temperature corresponding to the second mode of making hot water in the water tank of the air conditioner heating and heat recovery unit. For example, it is divided into 3 temperature ranges, and the number of temperature ranges can be adjusted according to the unit design requirements, including range A2, range B2, range C2, and range D2. According to different change trends of the outdoor ambient temperature, it is divided into an upward trend and a downward trend. The temperature ranges corresponding to the outdoor ambient temperature with an upward trend are determined by greater than or equal to, and the temperature ranges corresponding to the outdoor ambient temperature with a downward trend are determined by less than. If the change trend of the outdoor ambient temperature is an upward trend, when the current outdoor ambient temperature T4 is greater than or equal to T4_HEAT_OUTQ1 / T4_Tank_OUTQ1, it is in range A2. When the current outdoor ambient temperature is greater than or equal to T4_HEAT_OUTQ2 / T4_Tank_OUTQ2 and less than T4_HEAT_OUTQ1 / , the range it is in is range B2. When the current outdoor ambient temperature is less than T4_HEAT_OUTQ2 / T4_Tank_OUTQ2, the range it is in is range C2. If the change trend of the outdoor ambient temperature is a downward trend, when the current outdoor ambient temperature T4 is less than T4_HEAT_OUTQ2-t / T4_Tank_OUTQ2-t, it is in range C2. When the current outdoor ambient temperature is greater than or equal to T4_HEAT_OUTQ2-t / T4_Tank_OUTQ2-t and less than T4_HEAT_OUTQ1-t / T4_Tank_OUTQ1-t, the range it is in is range B2. When the current outdoor ambient temperature T4 is greater than or equal to T4_HEAT_OUTQ1-t / T4_Tank_OUTQ1-t, the range it is in is range A2. In a specific implementation, t is the dead band temperature, generally taken as 1-2°C. Specifically, T4_HEAT_OUTQ1 / T4_Tank_OUTQ1 > T4_HEAT_OUTQ1-t / T4_Tank_OUTQ1-t > T4_HEAT_OUTQ2 / T4_Tank_OUTQ2 > T4_HEAT_OUTQ2-t / T4_Tank_OUTQ2-t. Among them, the recommended value of T4_HEAT_OUTQ1 or T4_Tank_OUTQ1 is 15°C, and the range is 12-18°C. The recommended value of T4_HEAT_OUTQ2 or T4_Tank_OUTQ2 is 5°C, and the range is 2-8°C;

[0102] In a feasible implementation manner, step S20 may include steps S21 to S23:

[0103] Step S21: Obtain the historical outdoor ambient temperature within a preset time period, and determine the current change trend of the outdoor ambient temperature according to the historical outdoor ambient temperature and the current outdoor ambient temperature.

[0104] It should be noted that the preset time can be set to 30 min, 60 min, etc. For example, by statistically analyzing the historical outdoor ambient temperature within 30 min, the current change trend of the outdoor ambient temperature can be determined. The current change trend includes an upward trend and a downward trend.

[0105] Step S22: Determine a plurality of corresponding temperature ranges according to the current operating mode.

[0106] In a specific implementation, for example, if the current operating mode is the first mode, the corresponding Figure 3 plurality of temperature ranges include range A1, B1, and C1. For example, if the current operating mode is the second mode, the corresponding Figure 3 plurality of temperature ranges include range A2, B2, and C2.

[0107] Step S23: Determine the target temperature range in which the current outdoor ambient temperature is located from the plurality of temperature ranges according to the current change trend and the current outdoor ambient temperature.

[0108] In a specific implementation, the target temperature range in which T4 is located can be determined from the plurality of temperature ranges A1, B1, and C1 according to the current change trend and the current outdoor ambient temperature. For example, for the plurality of temperature ranges A1, B1, and C1, if the current change trend of T4 is an upward trend and T4 is greater than or equal to T4_HEAT_OUTQ1, the target temperature range is range A1.

[0109] Step S30: Control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range to achieve silent control of the multi-connected unit device.

[0110] It should be noted that in different water temperature data, different operating modes, and different temperature ranges, the corresponding control processes and controlled objects are different. For example, it can be determined whether to control the water tank according to the current operating mode and water temperature data, or it can be determined whether to control the outdoor unit and the compressor according to the current operating mode and water temperature data, and specific control of the outdoor unit and the compressor is performed according to the target temperature range. For example, the operating frequency of the compressor and / or the fan speed of the outdoor unit are adjusted according to the values within the target temperature range, so as to control the noise of the outdoor unit and achieve silent control of the multi-connected unit device.

[0111] This embodiment provides a mute control method for a multi-connected unit. In response to a mute control instruction, the current operating mode of the multi-connected unit, the water temperature data of the water tank of the heat recovery unit, and the current outdoor ambient temperature are obtained. A target temperature range where the current outdoor ambient temperature is located is determined based on the current operating mode and the current outdoor ambient temperature. At least one of the water tank of the heat recovery unit, the outdoor unit, and the compressor is controlled according to at least one of the water temperature data, the current operating mode, and the target temperature range to achieve mute control of the multi-connected unit. By controlling at least one of the water tank of the heat recovery unit, the outdoor unit, the fan speed of the outdoor unit, and the compressor, the problem of neighborhood complaints caused by the noise of the outdoor unit of the heat recovery air conditioner is effectively improved, and the user experience and the refrigeration and hot water supply effects are improved on the premise that the noise of the outdoor unit does not disturb the residents.

[0112] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar content as that in the above-mentioned first embodiment can be referred to the above introduction and will not be repeated hereinafter. On this basis, please refer to Figure 6 , step S30 includes steps S301 to S304:

[0113] Step S301: When the current operating mode is the first mode of air conditioner refrigeration and hot water production in the water tank of the heat recovery unit, obtain the operating time of the first mode operating in the first mode.

[0114] It should be noted that the first mode is the mode of air conditioner refrigeration operation and hot water production operation in the water tank of the heat recovery unit. At this time, the operating time of the first mode operating in the first mode can be obtained first, so as to judge whether the indoor unit and the outdoor unit have reached a relatively stable state, that is, whether the air conditioner has achieved the refrigeration effect and whether the water tank of the heat recovery unit has reached the hot water production effect set by the user.

[0115] Based on the above Figure 2 structural schematic diagram of the multi-connected unit, as Figure 7a , Figure 7b and Figure 7c shown, Figures 7a - 7c is the circuit structure schematic diagram of the first mode of air conditioner refrigeration and hot water production in the water tank of the heat recovery unit, Figure 7a is the circuit structure schematic diagram of the heat recovery mode 1 of the multi-connected unit in air conditioner refrigeration and hot water production in the water tank of the heat recovery unit. At this time, the outdoor unit can be regarded as an indoor unit in the refrigeration mode. The condition for entering the outdoor unit mute function is that any one of the indoor units receives the outdoor unit mute instruction. At this time, the turned-on indoor unit operates according to the current operating mode unchanged, that is, normal refrigeration operation. At this time, mute control is performed on the outdoor unit, and at the same time, the water tank of the heat recovery unit is controlled. First, control the water tank of the heat recovery unit to continue operating in the mode of air conditioner refrigeration and hot water production in the water tank of the heat recovery unit, that is, normal hot water production mode work. Figure 7bIt is a schematic diagram of the circuit structure in heat recovery mode 2 for a multi-connected unit to produce hot water in the water tank of an air conditioner's refrigeration and heat recovery unit. At this time, only the compressor in the outdoor unit is running, and the outdoor unit fan is not operating. Figure 7c It is a schematic diagram of the circuit structure in heat recovery mode 3 for a multi-connected unit to produce hot water in the water tank of an air conditioner's refrigeration and heat recovery unit. In this mode, the indoor units are generally in a fully open state, and both the outdoor unit and the water tank are equivalent to condensers. When the outdoor unit mute function is activated, there will mainly be insufficient cooling capacity. Therefore, the water tank of the heat recovery unit can be controlled to continue operating in the mode of the air conditioner's refrigeration and heat recovery unit producing hot water in the water tank, that is, operating in the normal hot water production mode. Based on the above Figure 3 schematic diagram of the multi-connected unit structure, as Figure 8a 、 Figure 8b and Figure 8c shown, Figures 8a - 8c It is another schematic diagram of the circuit structure in the first mode for an air conditioner's refrigeration and heat recovery unit to produce hot water in the water tank. Figure 8a It is another schematic diagram of the circuit structure in heat recovery mode 1 for a multi-connected unit to produce hot water in the water tank of an air conditioner's refrigeration and heat recovery unit. At this time, the outdoor unit can be regarded as an indoor unit in the cooling mode. The condition for entering the outdoor unit mute function is that any one of the indoor units receives the outdoor unit mute command. At this time, the activated indoor units operate according to the current operating mode unchanged, that is, normal refrigeration operation. At this time, mute control is performed on the outdoor unit, and at the same time, control is performed on the water tank of the heat recovery unit. First, the water tank of the heat recovery unit is controlled to continue operating in the mode of the air conditioner's refrigeration and heat recovery unit producing hot water in the water tank, that is, operating in the normal hot water production mode. Figure 8b It is a schematic diagram of the circuit structure in heat recovery mode 2 for a multi-connected unit to produce hot water in the water tank of an air conditioner's refrigeration and heat recovery unit. At this time, only the compressor in the outdoor unit is running, and the outdoor unit fan is not operating. Figure 8c It is a schematic diagram of the circuit structure in heat recovery mode 3 for a multi-connected unit to produce hot water in the water tank of an air conditioner's refrigeration and heat recovery unit. In this mode, the indoor units are generally in a fully open state, and both the outdoor unit and the water tank are equivalent to condensers. When the outdoor unit mute function is activated, there will mainly be insufficient cooling capacity. Therefore, the water tank of the heat recovery unit can be controlled to continue operating in the mode of the air conditioner's refrigeration and heat recovery unit producing hot water in the water tank, that is, operating in the normal hot water production mode.

[0116] Step S302: When the operation time in the first mode is greater than or equal to the first preset operation time, obtain the water temperature at the bottom of the water tank according to the water temperature data, and obtain the saturation temperature value corresponding to the high pressure.

[0117] It should be noted that the first preset operation time CoolW_Tog_time represents the critical time when the indoor unit and the outdoor unit operate to reach a relatively stable state. If the operation time of the first mode is less than the first preset operation time, the operation time of the first mode can be continuously detected without adjusting the control of the water tank, the outdoor unit or the compressor.

[0118] The range of the first preset operation time is 15 - 40 min. In this embodiment, 30 min is taken as an example for illustration. If the operation time of the first mode is greater than or equal to CoolW_Tog_time, that is, the operation time of the first mode is greater than or equal to 30 min, it can be further determined whether the hot water production capacity of the water tank is affected. Therefore, the water temperature T5L at the bottom of the water tank can be obtained according to the water temperature data, and the saturation temperature value Tc corresponding to the high pressure detected by the high-pressure sensor can be obtained.

[0119] Step S303: When the temperature difference between the water temperature at the bottom of the water tank and the saturation temperature value is greater than the preset temperature difference or the temperature difference is less than or equal to the preset temperature difference but the duration is less than the preset time threshold, obtain the frequency limit value and the fan speed limit value corresponding to the target temperature range.

[0120] It should be noted that the temperature difference can be calculated based on the water temperature T5L at the bottom of the water tank and the saturation temperature value Tc. The preset temperature difference ΔT can be set to a relatively small value, and the range is 0.5 - 1.5 °C. For example, if ΔT is set to 1 °C, it can be determined whether Tc - T5L is less than or equal to ΔT. The setting range of the preset time threshold is 5 - 20 min. For example, the preset time threshold t1 is set to 10 min.

[0121] If Tc - T5L > ΔT, it indicates that the heating effect of the water tank is not greatly affected or the heating effect of the water tank is not bad at this time. Therefore, the compressor and the outdoor fan can be further controlled to reduce the operation noise. If Tc - T5L ≤ ΔT but the duration does not exceed 10 min, it indicates that the heating effect of the water tank is fluctuating, but it does not continuously operate with a poor heating effect. Therefore, the compressor and the outdoor fan can also be further controlled to reduce the operation noise, and the corresponding frequency limit value and fan speed value can be obtained according to the outdoor ambient temperature and the target temperature range corresponding to the current operation mode.

[0122] It should be noted that in the first mode, the interval control is as follows: In area C1, the maximum frequency FREQ_C1 and the maximum speed limit FANSPD_C1 are set as follows; in area B1, the maximum frequency FREQ_B1 and the maximum speed limit FANSPD_B1 are set as follows; in area A1, the maximum frequency FREQ_A1 and the maximum speed limit FANSPD_A1 are set as follows. Therefore, the frequency limit value and the fan speed limit value can be obtained according to the target interval. For example, if the target interval is A1, the frequency limit value is FREQ_A1, and the fan speed limit value is FANSPD_A1.

[0123] In a feasible implementation, if the heating effect of the water tank for making hot water is very poor, the heating function of the water tank needs to be considered at this time. Therefore, after step S302, it further includes: when the temperature difference between the water temperature at the bottom of the water tank and the saturation temperature value is less than or equal to the preset water temperature difference and the duration is greater than or equal to the preset time threshold, control the outdoor unit to switch to the cooling mode, and control the electric heating of the water tank of the heat recovery unit to be turned on.

[0124] It should be noted that if Tc - T5L ≤ ΔT and the duration exceeds 10 minutes, it indicates that the heating effect of the water tank is very poor at this time. To ensure the heating function of the water tank, the outdoor unit can be directly switched to the cooling mode at this time, and at the same time, control the electric heating of the water tank of the heat recovery unit to be turned on, that is, control the heat pump to stop making hot water and switch to electric heating to make hot water, so as to improve the heating effect of the water tank.

[0125] Step S304: Control the operating frequency of the compressor and the fan speed of the outdoor unit respectively through the frequency limit value and the fan speed limit value.

[0126] In specific implementation, the operating frequency of the compressor can be adjusted through the frequency limit value, and the fan speed of the outdoor unit can be adjusted according to the fan speed limit value. For example, the operating frequency of the compressor is limited to operate below the frequency limit value, and the fan speed is limited to operate below the fan speed limit value.

[0127] In specific implementation, the working range of the operating frequency of the compressor can also be set according to the frequency limit value and the working range of the fan speed can be set according to the fan speed limit value, so as to achieve a better noise control effect.

[0128] In a feasible implementation, step S304 may include steps A11 to A14:

[0129] Step A11: Obtain the maximum refrigeration operating frequency of the compressor.

[0130] It should be noted that the maximum refrigeration operating frequency Fmax1 of the compressor is the maximum operating frequency set for the compressor to operate in the cooling mode, and it can be obtained according to the model of the compressor.

[0131] Step A12: Determine the frequency limit range according to the frequency limit value, and determine the speed limit range according to the fan speed limit value.

[0132] It should be noted that the frequency limit range during the operation of the compressor can be determined according to the frequency limit value. For example, if the frequency limit value is FREQ_A1, the frequency limit range during the operation of the compressor is set to 65% - 80%, and the speed limit range is set according to the fan speed limit value. For example, if the fan speed limit value is FANSPD_A1, the speed limit range is 660 - 800.

[0133] Step A13: Calculate the first target frequency control range through the maximum refrigeration operation frequency and the frequency limit range.

[0134] In a specific implementation, the first target frequency control range for controlling the compressor can be calculated according to Fmax1 and the frequency limit range. The first target frequency control range = Fmax1 * the frequency limit range. For example, if the frequency limit range is 65% - 80%, the first target frequency control range is Fmax1 * 65% - Fmax1 * 80%.

[0135] As shown in Table 1, Table 1 is the compressor adjustment and outdoor fan speed adjustment table when the current operation mode is the first mode.

[0136] Table 1

[0137]

[0138] Table 1 also has recommended values for compressor adjustment and fan speed adjustment. For example, if the frequency limit range is 65% - 80%, the frequency limit can be selected as 70%. Therefore, the value of the frequency adjustment for the compressor is Fmax1 * 70%. For example, if the fan speed limit range is 660 - 800, the recommended value of 720 can be selected to adjust the fan speed. The recommended values of the compressor frequency and the fan speed can be adjusted according to requirements.

[0139] Step A14: Control the operating frequency of the compressor to operate within the first target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

[0140] In a specific implementation, the operating frequency of the compressor can be controlled to operate within the first target frequency control range, and at the same time, the fan speed of the outdoor unit can be controlled to operate within the speed limit range. The recommended value can be further set according to the first target frequency control range, and the recommended value can be set according to the speed limit range, so as to control the compressor to operate at the frequency of the set recommended value and control the fan to operate at the speed of the set recommended value.

[0141] When the current operating mode is the first mode of air conditioner refrigeration and hot water production in the water tank of the heat recovery unit, obtain the operating time of the first mode operating in the first mode; when the operating time of the first mode is greater than or equal to the first preset operating time, obtain the water temperature at the lower part of the water tank according to the water temperature data, and obtain the saturation temperature value corresponding to the high pressure; when the water temperature difference between the water temperature at the lower part of the water tank and the saturation temperature value is greater than the preset water temperature difference or the water temperature difference is less than or equal to the preset water temperature difference but the duration is less than the preset time threshold, obtain the frequency limit value and the fan speed limit value corresponding to the target temperature range; control the operating frequency of the compressor and the fan speed of the outdoor unit through the frequency limit value and the fan speed limit value respectively. When adjusting the compressor and the fan to achieve silent control, the hot water production effect of the water tank is also considered, so as to reduce the noise of the compressor and the fan on the premise that the hot water production of the water tank is not affected, and avoid the problem of insufficient hot water production capacity caused by silent control.

[0142] Based on the first embodiment of the present application, in the third embodiment of the present application, the same or similar content as in the above-mentioned first embodiment can be referred to the above introduction and will not be repeated hereinafter. On this basis, please refer to Figure 9 , step S30 includes steps S301' to S302':

[0143] Step S301': When the current operating mode is the second mode of air conditioner heating and hot water production in the water tank of the heat recovery unit, obtain the mode priority.

[0144] It should be noted that the second mode is the mode of air conditioner heating operation and hot water production operation in the water tank of the heat recovery unit. In the second mode, it is further divided into air conditioner priority and hot water priority. Therefore, the mode priority can be obtained, and the mode priority includes air conditioner priority or hot water priority.

[0145] Step S302': Control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the mode priority, the water temperature data, and the target temperature range.

[0146] In specific implementation, when in different mode priorities, the heating control of the water tank is different. Therefore, specifically, one or more of the water tank, the outdoor unit, and the compressor can be controlled according to one or more of the mode priority, the water temperature data, and the target temperature range.

[0147] In a feasible implementation manner, step S302' may include steps B11 to B13:

[0148] Step B11: Obtain the current water temperature according to the water temperature data;

[0149] It should be noted that the current water temperature is the average water temperature in the water tank, which can be directly detected by a temperature sensor or calculated from the temperatures detected by sensors set at various places in the water tank.

[0150] It should be understood that a preset water temperature threshold Tk1 can be set in advance. The preset water temperature threshold can indicate whether the current water temperature is a low water temperature or not. Therefore, the current water temperature Tk can be compared with the preset water temperature threshold Tk1 to determine whether the current water temperature is a low water temperature. The range of the preset water temperature threshold Tk1 can be set to 32 - 40 °C. For example, the recommended value of Tk1 is 36 °C.

[0151] Step B12: When the current water temperature is less than the preset water temperature threshold, obtain the frequency limit value and the fan speed limit value corresponding to the target temperature range;

[0152] In a specific implementation, if the current water temperature Tk is less than the preset water temperature threshold Tk1, it means that the current water temperature is a low water temperature. Therefore, the frequency reduction and fan speed reduction can be normally adjusted according to the current outdoor ambient temperature, and the frequency limit value and the fan speed limit value corresponding to the target temperature range can be obtained.

[0153] It should be noted that in the second mode, the interval control is as follows: In area C2, the maximum frequency FREQ_C2 and the maximum speed limit FANSPD_C2 are set as follows; in area B2, the maximum frequency FREQ_B2 and the maximum speed limit FANSPD_B2 are set as follows; in area A2, the maximum frequency FREQ_A2 and the maximum speed limit FANSPD_A2 are set as follows. Therefore, the frequency limit value and the fan speed limit value can be obtained according to the target interval. For example, if the target interval is A2, the frequency limit value is FREQ_A2 and the fan speed limit value is FANSPD_A2.

[0154] Step B13: Control the operating frequency of the compressor and the fan speed of the outdoor unit respectively through the frequency limit value and the fan speed limit value according to the mode priority.

[0155] In a specific implementation, the operating frequency of the compressor and the fan speed of the outdoor unit can be further adjusted and controlled according to the specific mode priority through the frequency limit value and the fan speed limit value, so as to achieve the mute control of the multi-connected unit equipment.

[0156] In a feasible implementation manner, step B13 may include:

[0157] When the mode priority is air conditioner priority, obtain the maximum heating operating frequency of the compressor;

[0158] Determine the frequency limit range according to the frequency limit value and determine the speed limit range according to the fan speed limit value;

[0159] Calculate the second target frequency control range based on the maximum heating operation frequency and the frequency limit range;

[0160] Control the operating frequency of the compressor to operate within the second target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

[0161] It should be noted that based on the above Figure 2 schematic diagram of the heat exchange equipment structure, as Figure 10a and Figure 10b shown, Figures 10a - 10b is the schematic diagram of the circuit structure of the second mode where the air conditioner heats up and the water tank of the heat recovery unit makes hot water with the air conditioner being prioritized, Figure 10a is the schematic diagram of the circuit structure of the air conditioner heat pump heating and the water tank of the heat recovery unit making hot water by electric heating, Figure 10b is the schematic diagram of the circuit structure of the air conditioner heating and the water tank of the heat recovery unit making hot water by heat pump. Based on the above Figure 3 schematic diagram of the heat exchange equipment structure, as Figure 11a and Figure 11b shown, Figure 11a and Figure 11b are the schematic diagrams of the circuit structure of the second mode where the air conditioner heats up and the water tank of the heat recovery unit makes hot water with the air conditioner being prioritized, Figure 11a is the schematic diagram of the circuit structure of the air conditioner heat pump heating and the water tank of the heat recovery unit making hot water by electric heating, Figure 11b is the schematic diagram of the circuit structure of the air conditioner heating and the water tank of the heat recovery unit making hot water by heat pump.

[0162] The maximum heating operation frequency Fmax2 of the compressor is the maximum operation frequency set for the air conditioner to operate preferentially in the heating mode, and can be obtained according to the model of the compressor.

[0163] It should be noted that the frequency limit range during the operation of the compressor can be determined according to the frequency limit value. For example, if the frequency limit value is FREQ_A2, then the frequency limit range during the operation of the compressor is set to 15% - 30%, and the speed limit range is set according to the fan speed limit value. For example, if the fan speed limit value is FANSPD_A2, then the speed limit range is 300 - 600.

[0164] In a specific implementation, the second target frequency control range for controlling the compressor can be calculated based on Fmax2 and the frequency limit range. The second target frequency control range = Fmax2 * the frequency limit range. For example, if the frequency limit range is 15% - 30%, then the second target frequency control range is Fmax2 * 15% - Fmax2 * 30%.

[0165] As shown in Table 2, Table 2 is a compressor regulation and external fan speed regulation table when the current operating mode is the second mode and air conditioning has priority.

[0166] Table 2

[0167]

[0168] Table 2 also sets recommended values for compressor regulation and fan speed regulation. For example, if the frequency limit range is 15% - 30%, a frequency limit of 20% can be selected. Thus, the value of the frequency regulation for the compressor is Fmax2 * 20%. For example, if the fan speed limit range is 300 - 600, a recommended value of 400 can be selected to regulate the fan speed. The recommended values of the compressor frequency and the fan speed can be adjusted according to requirements.

[0169] In specific implementation, the operating frequency of the compressor can be controlled to operate within the second target frequency control range, and at the same time, the fan speed of the outdoor unit can be controlled to operate within the speed limit range. The recommended values can be further set according to the second target frequency control range and the speed limit range, so as to control the compressor to operate at the frequency of the set recommended value and control the fan to operate at the speed of the set recommended value.

[0170] In a feasible implementation manner, step B13 may further include:

[0171] When the mode priority is hot water priority, obtain the maximum frequency of the compressor for hot water production operation;

[0172] Determine the frequency limit range according to the frequency limit value, and determine the speed limit range according to the fan speed limit value;

[0173] Calculate the third target frequency control range through the maximum frequency of the hot water production operation and the frequency limit range;

[0174] Control the operating frequency of the compressor to operate within the third target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

[0175] It should be noted that based on the Figure 2 structural schematic diagram of the heat exchange equipment above, as Figure 12a and Figure 12b shown, Figures 12a - 12b is the circuit structure schematic diagram of the second mode of the air conditioner for heating and the heat recovery unit water tank for making hot water with hot water priority, Figure 12a is the circuit structure schematic diagram of the heat recovery unit water tank for making hot water, Figure 12b is the circuit structure schematic diagram of the air conditioner for heating and the heat recovery unit water tank for making hot water by heat pump. Based on the Figure 3 structural schematic diagram of the heat exchange equipment above, as Figure 13a andFigure 13b As shown in Figures 13a - 13b Fig. is a schematic circuit diagram of the second mode in which the air conditioner heats and the water tank of the heat recovery unit makes hot water with hot water priority Figure 13a Fig. is a schematic circuit diagram of the water tank of the heat recovery unit making hot water Figure 13b Fig. is a schematic circuit diagram of the air conditioner heating and the water tank of the heat recovery unit making hot water by heat pump

[0176] The maximum hot water production operation frequency Fmax3 of the compressor is the maximum operation frequency of the compressor for making hot water set in the hot water priority operation in the heating mode, and can be obtained according to the model of the compressor

[0177] It should be noted that the frequency limit range during the operation of the compressor can be determined according to the frequency limit value. For example, if the frequency limit value is FREQ_A2, the frequency limit range during the operation of the compressor is set to 15% - 30%, and the speed limit range is set according to the fan speed limit value. For example, if the fan speed limit value is FANSPD_A2, the speed limit range is 300 - 600

[0178] In specific implementation, the third target frequency control range for controlling the compressor can be calculated according to Fmax3 and the frequency limit range. The third target frequency control range = Fmax3 * frequency limit range. For example, if the frequency limit range is 15% - 30%, the third target frequency control range is Fmax3 * 15% - Fmax3 * 30%

[0179] As shown in Table 3, Table 3 is the compressor adjustment and outdoor fan speed adjustment table when the current operation mode is the second mode and hot water is given priority

[0180] Table 3

[0181]

[0182] Table 2 also sets recommended values for compressor adjustment and fan speed adjustment. For example, if the frequency limit range is 15% - 30%, the frequency limit can be selected as 20%. Therefore, the value of the frequency adjustment for the compressor is Fmax3 * 20%. For example, if the fan speed limit range is 300 - 600, the recommended value of 400 can be selected to adjust the fan speed. The recommended values of the compressor frequency and the fan speed can be adjusted according to requirements

[0183] In specific implementation, the operation frequency of the compressor can be controlled to operate within the third target frequency control range, and at the same time, the fan speed of the outdoor unit can be controlled to operate within the speed limit range. The recommended value can be further set according to the third target frequency control range, and the recommended value can be set according to the speed limit range, so as to control the compressor to operate at the frequency of the set recommended value and control the fan to operate at the speed of the set recommended value

[0184] It should be noted that if the current water temperature of the water tank is not low, the heat pump can be controlled to operate simultaneously, and it is further determined whether the water tank needs to be controlled. Therefore, after step B11, the following steps are also included:

[0185] Obtain the lower water temperature of the water tank according to the water temperature data, and obtain the saturation temperature value corresponding to the high pressure; when the current water temperature is greater than or equal to the preset water temperature threshold, control the heat pump to operate simultaneously for heating and making hot water; when the heat pump operates simultaneously, obtain the operation time of the second mode operating in the second mode; when the operation time of the second mode is greater than or equal to the second preset operation time, the water temperature difference between the lower water temperature of the water tank and the saturation temperature value is less than or equal to the preset water temperature difference, and the duration is greater than or equal to the preset time threshold, control the outdoor unit to switch to the heating mode, and control the heat recovery unit water tank to turn on the electric heating.

[0186] In a specific implementation, the heat pump can also be controlled according to the relationship between the water temperature difference between the lower water temperature of the water tank and the saturation temperature value and the preset water temperature threshold. When the current water temperature is greater than or equal to the preset water temperature threshold, it indicates that the current water temperature is not low. Therefore, the heat pump can be controlled to operate simultaneously, and after it is turned on, the operation time of the second mode of heating + making hot water is detected in real time. The second preset operation time range can be set to 15 - 40 minutes, for example, set to 20 minutes. If the operation time of the second mode is greater than or equal to 20 minutes, it can be determined whether the water temperature difference between the lower water temperature of the water tank and the saturation temperature value is less than or equal to the preset water temperature difference ΔT and the duration is greater than or equal to the preset time threshold t1. If so, the outdoor unit is directly converted into the heating mode, and at the same time, the heat recovery unit water tank is controlled to turn on the electric heating. This is mainly because the heating effect of the water tank is very poor at this time, so the heat pump hot water production is withdrawn and converted into electric heating hot water production.

[0187] In this embodiment, when the current operation mode is the second mode of air conditioner heating and heat recovery unit water tank making hot water, the mode priority is obtained; at least one of the heat recovery unit water tank, the outdoor unit, and the compressor is controlled according to at least one of the mode priority, the water temperature data, and the target temperature range. By considering the priority in different modes, at least one of the heat recovery unit water tank, the outdoor unit, and the compressor is further controlled according to the mode priority, which not only improves the mute performance of the multi-connected unit device, but also ensures the heating effect of the air conditioner and the hot water production capacity of the heat recovery unit water tank, providing a more comfortable and energy-saving use experience for users.

[0188] It should be noted that the above examples are only for understanding the present application and do not constitute a limitation on the mute control method of the multi-connected unit device of the present application. Based on this technical concept, more forms of simple transformation are within the protection scope of the present application.

[0189] The present application also provides a silent control device for a multi-connected unit. Referring to FIG. 10, the silent control device for the multi-connected unit includes:

[0190] An acquisition module 10, configured to acquire the current operating mode of the multi-connected unit, the water temperature data of the heat recovery unit water tank, and the current outdoor ambient temperature in response to a silent control instruction;

[0191] A determination module 20, configured to determine a target temperature range where the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature;

[0192] A control module 30, configured to control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range to achieve silent control of the multi-connected unit.

[0193] The silent control device for the multi-connected unit provided by the present application adopts the silent control method for the multi-connected unit in the above embodiment, and can solve the technical problem that the current multi-connected unit with one outdoor unit and multiple indoor units cannot ensure the hot water production effect while performing silent control. Compared with the prior art, the beneficial effects of the silent control device for the multi-connected unit provided by the present application are the same as those of the silent control method for the multi-connected unit provided by the above embodiment, and other technical features in the silent control device for the multi-connected unit are the same as those disclosed in the above embodiment method, and will not be elaborated herein.

[0194] The present application provides a multi-connected unit, which includes: a heat recovery unit water tank, an outdoor unit, an electronic expansion valve, and an indoor unit group that are sequentially connected to form a loop. The indoor unit group includes a plurality of indoor units, and the electronic expansion valve includes a main electronic expansion valve;

[0195] The multi-connected unit further includes at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the silent control method for the multi-connected unit in the first embodiment above.

[0196] The multi-connected unit provided by the present application adopts the silent control method for the multi-connected unit in the above embodiment, and can solve the technical problem that the current multi-connected unit with one outdoor unit and multiple indoor units cannot ensure the hot water production effect while performing silent control. Compared with the prior art, the beneficial effects of the multi-connected unit provided by the present application are the same as those of the silent control method for the multi-connected unit provided by the above embodiment, and other technical features in the multi-connected unit are the same as those disclosed in the above embodiment method, and will not be elaborated herein.

[0197] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0198] As described above, the above are only specific embodiments of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, and all should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

[0199] This application provides a computer-readable storage medium with computer-readable program instructions (i.e., computer programs) stored thereon, and the computer-readable program instructions are used to execute the silent control method of the multi-connected device in the above embodiments.

[0200] The computer-readable storage medium provided by this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, RAM (Random Access Memory), ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory or flash memory), optical fibers, CD-ROM (CD-Read Only Memory, portable compact disk read-only memory), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or combined with an instruction execution system, device, or device. The program code contained on the computer-readable storage medium can be transmitted by any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0201] The above computer-readable storage medium can be included in the multi-connected device; it can also exist separately and not be assembled into the multi-connected device.

[0202] The above computer-readable storage medium carries one or more programs, which, when executed by the multi-connected device, cause the multi-connected device to: in response to a mute control instruction, obtain the current operating mode of the multi-connected device, the water temperature data of the water tank of the heat recovery unit, and the current outdoor ambient temperature; determine the target temperature range in which the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature; control at least one of the water tank of the heat recovery unit, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range to achieve the mute control of the multi-connected device.

[0203] Computer program code for performing the operations of the present application may be written in one or more programming languages or combinations thereof. The programming languages include object-oriented programming languages such as Java, Smalltalk, C++, and also include conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a LAN (Local Area Network) or a WAN (Wide Area Network), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0204] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0205] The modules involved in the embodiments of the present application can be implemented in software or in hardware. Among them, the name of the module does not constitute a limitation to the unit itself in some cases.

[0206] The readable storage medium provided by the present application is a computer-readable storage medium, and the computer-readable storage medium stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned silent control method of the multi-connected device, which can solve the technical problem that the multi-connected device with one outdoor unit and multiple indoor units cannot ensure the hot water heating effect while performing silent control. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as those of the silent control method of the multi-connected device provided by the above embodiments, and will not be elaborated here.

[0207] The present application also provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps of the silent control method of the multi-connected device as described above are implemented.

[0208] The computer program product provided by the present application can solve the technical problem that the multi-connected device with one outdoor unit and multiple indoor units cannot ensure the hot water heating effect while performing silent control. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as those of the silent control method of the multi-connected device provided by the above embodiments, and will not be elaborated here.

[0209] The above are only some embodiments of the present application, and do not limit the patent scope of the present application accordingly. All equivalent structural transformations made under the technical concept of the present application by using the content of the specification and drawings of the present application, or directly / indirectly applied to other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A silent control method for a multi-connected unit device, characterized in that, The multi-connected unit device includes: a heat recovery unit water tank, an outdoor unit, an electronic expansion valve, and an indoor unit group that are sequentially connected to form a loop. The indoor unit group includes a plurality of indoor units, and the electronic expansion valve includes a main electronic expansion valve; The silent control method of the multi-connected unit device includes: In response to a silent control instruction, obtaining the current operating mode of the multi-connected unit device, the water temperature data of the heat recovery unit water tank, and the current outdoor ambient temperature; Based on the current operating mode and the current outdoor ambient temperature, determining the target temperature range where the current outdoor ambient temperature is located; Controlling at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range to achieve silent control of the multi-connected unit device.

2. The method according to claim 1, wherein The step of controlling at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range includes: When the current operating mode is the first mode of air conditioner refrigeration and heat recovery unit water tank hot water production, obtaining the first mode operating time of operating in the first mode; When the first mode operating time is greater than or equal to the first preset operating time, obtaining the water temperature of the lower part of the water tank according to the water temperature data, and obtaining the saturation temperature value corresponding to the high pressure; When the water temperature difference between the water temperature of the lower part of the water tank and the saturation temperature value is greater than the preset water temperature difference or the water temperature difference is less than or equal to the preset water temperature difference but the duration is less than the preset time threshold, obtaining the frequency limit value and the fan speed limit value corresponding to the target temperature range; Controlling the operating frequency of the compressor and the fan speed of the outdoor unit respectively through the frequency limit value and the fan speed limit value.

3. The method according to claim 2, wherein The step of controlling the operating frequency of the compressor and the fan speed of the outdoor unit respectively through the frequency limit value and the fan speed limit value includes: Obtaining the maximum refrigeration operating frequency of the compressor; Determining the frequency limit range according to the frequency limit value and determining the speed limit range according to the fan speed limit value; Calculating the first target frequency control range through the maximum refrigeration operating frequency and the frequency limit range; Controlling the operating frequency of the compressor to operate within the first target frequency control range and controlling the fan speed of the outdoor unit to operate within the speed limit range.

4. The method according to claim 2, wherein After the step of obtaining the water temperature of the lower part of the water tank according to the water temperature data and obtaining the saturation temperature value corresponding to the high pressure when the first mode operating time is greater than or equal to the first preset operating time, it further includes: When the water temperature difference between the water temperature of the lower part of the water tank and the saturation temperature value is less than or equal to the preset water temperature difference and the duration is greater than or equal to the preset time threshold, controlling the outdoor unit to switch to the refrigeration mode and controlling the heat recovery unit water tank to turn on the electric heating.

5. The method according to claim 1, characterized in that, The step of controlling at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range includes: When the current operating mode is the second mode of the air conditioner for heating and the water tank of the heat recovery unit for making hot water, obtain the mode priority; Control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the mode priority, the water temperature data, and the target temperature range.

6. The method according to claim 5, characterized in that, The step of controlling at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the mode priority, the water temperature data, and the target temperature range includes: Obtain the current water temperature according to the water temperature data; When the current water temperature is less than the preset water temperature threshold, obtain the frequency limit value and the fan speed limit value corresponding to the target temperature range; Control the operating frequency of the compressor and the fan speed of the outdoor unit respectively according to the mode priority through the frequency limit value and the fan speed limit value.

7. The method according to claim 6, wherein The step of controlling the operating frequency of the compressor and the fan speed of the outdoor unit respectively according to the mode priority through the frequency limit value and the fan speed limit value includes: When the mode priority is air conditioner priority, obtain the maximum heating operating frequency of the compressor; Determine the frequency limit range according to the frequency limit value, and determine the speed limit range according to the fan speed limit value; Calculate the second target frequency control range through the maximum heating operating frequency and the frequency limit range; Control the operating frequency of the compressor to operate within the second target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

8. The method according to claim 6, wherein The step of controlling the operating frequency of the compressor and the fan speed of the outdoor unit respectively according to the mode priority through the frequency limit value and the fan speed limit value includes: When the mode priority is hot water priority, obtain the maximum hot water making operating frequency of the compressor; Determine the frequency limit range according to the frequency limit value, and determine the speed limit range according to the fan speed limit value; Calculate the third target frequency control range through the maximum hot water making operating frequency and the frequency limit range; Control the operating frequency of the compressor to operate within the third target frequency control range, and control the fan speed of the outdoor unit to operate within the speed limit range.

9. The method according to claim 6, characterized in that, After the step of obtaining the current water temperature according to the water temperature data, it further includes: Obtain the water temperature of the lower part of the water tank according to the water temperature data, and obtain the saturation temperature value corresponding to the high pressure; When the current water temperature is greater than or equal to the preset water temperature threshold, control the heat pump to operate simultaneously for heating and making hot water; In the case of the heat pump operating simultaneously, obtain the second mode operating time of operating in the second mode; When the second mode operating time is greater than or equal to the second preset operating time, the water temperature difference between the water temperature of the lower part of the water tank and the saturation temperature value is less than or equal to the preset water temperature difference, and the duration is greater than or equal to the preset time threshold, control the outdoor unit to switch to the heating mode, and control the heat recovery unit water tank to turn on the electric heating.

10. The method according to any one of claims 1 to 9, characterized in that, The step of determining a target temperature range where the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature includes: Obtaining the historical outdoor ambient temperature within a preset time period, and determining the current change trend of the outdoor ambient temperature according to the historical outdoor ambient temperature and the current outdoor ambient temperature; Determining a plurality of corresponding temperature ranges according to the current operating mode; Determining the target temperature range where the current outdoor ambient temperature is located from the plurality of temperature ranges according to the current change trend and the current outdoor ambient temperature.

11. A mute control device for a multi-connected unit, characterized in that, The device includes: An acquisition module, configured to obtain the current operating mode of the multi-connected unit device, the water temperature data of the heat recovery unit water tank, and the current outdoor ambient temperature in response to a mute control instruction; A determination module, configured to determine a target temperature range where the current outdoor ambient temperature is located based on the current operating mode and the current outdoor ambient temperature; A control module, configured to control at least one of the heat recovery unit water tank, the outdoor unit, and the compressor according to at least one of the water temperature data, the current operating mode, and the target temperature range, so as to implement mute control of the multi-connected unit device.

12. A multi-connected unit device, characterized in that, The multi-connected unit device includes: a heat recovery unit water tank, an outdoor unit, an electronic expansion valve, and an indoor unit that are sequentially connected to form a loop. The indoor unit includes a plurality of indoor units, and the electronic expansion valve includes a main electronic expansion valve; The multi-connected unit device further includes: a memory, a processor, and a computer program stored on the memory and executable on the processor. The computer program is configured to implement the steps of the mute control method of the multi-connected unit device according to any one of claims 1 to 10.

13. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the mute control method of the multi-connected unit device according to any one of claims 1 to 10 are implemented.

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