Unit control method, device and heat pump unit

Abstract

The present application relates to a kind of unit control method, device and heat pump unit, it relates to heating ventilation air conditioning and refrigeration field, wherein, unit control method includes: obtaining the maximum sound pressure level allowed in the target position and the noise reduction distance between heat pump unit and the target position;Maximum sound power allowed when the heat pump unit operates is determined according to the maximum sound pressure level allowed in the target position and the noise reduction distance;Obtain the target operating parameter that the heat pump unit is allowed to operate under the maximum sound power condition;If detecting noise reduction trigger signal, control the heat pump unit according to the target operating parameter runs.This application embodiment heat pump unit can be in the total sound energy radiated less than the maximum sound power premise according to the target operating parameter of the highest unit energy efficiency, realize the balance of heat pump unit energy efficiency and silence or noise reduction, while reducing noise, maximum degree plays unit energy efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heating, ventilation, air conditioning and refrigeration, and in particular to a unit control method and device and a heat pump unit. BACKGROUND

[0002] A heat pump unit is an energy-saving device that absorbs heat from low-grade heat sources such as air, water or soil and transfers it to a space / medium that needs heating or cooling, while also being able to run in reverse to achieve refrigeration. The noise generated by the heat pump unit when it is running can cause noise pollution in the surrounding environment and affect user experience.

[0003] In some scenarios, users pay more attention to the noise of the unit than to energy efficiency and heating and cooling effects. Currently, the noise reduction function of the heat pump unit is mainly achieved by limiting the capacity of the unit, such as reducing the fan gear and the compressor frequency; but this kind of function depends on the preset gear and frequency limit, and its matching degree with the actual noise situation is low, that is, it is difficult to determine whether the preset gear and frequency limit are reasonable, it is impossible to accurately meet the user's needs in combination with the actual situation, and thus it is difficult to achieve a balance between energy efficiency and noise reduction or silence. SUMMARY

[0004] To solve the above technical problems or at least partially solve the above technical problems, the present application provides a unit control method, device and heat pump unit.

[0005] In a first aspect, the present application provides a unit control method, which comprises:

[0006] obtaining a noise reduction distance between a target position and a heat pump unit and a maximum sound pressure level allowed at the target position;

[0007] determining a maximum sound power allowed when the heat pump unit is running according to the noise reduction distance and the maximum sound pressure level;

[0008] obtaining a target operating parameter allowed for the heat pump unit to run under the condition of the maximum sound power;

[0009] if a noise reduction trigger signal is detected, controlling the heat pump unit to run according to the target operating parameter.

[0010] Optionally, determining the maximum sound power allowed when the heat pump unit is running according to the noise reduction distance and the maximum sound pressure level comprises:

[0011] obtaining a sound pressure at a target position, a reference sound pressure and an acoustic impedance;

[0012] calculating the maximum sound power based on the sound pressure, the noise reduction distance, the maximum sound pressure level, the reference sound pressure, the acoustic impedance and a preset sound power calculation formula.

[0013] Optionally, a target operation parameter of the heat pump unit allowing operation under the maximum sound power condition is acquired, comprising:

[0014] Based on a preset corresponding relationship between sound power and operation parameters of the unit, a unit operation parameter corresponding to the sound power equal to the maximum sound power is determined as a candidate operation parameter;

[0015] The target operation parameter is determined from the candidate operation parameters.

[0016] Optionally, the target operation parameter is determined from the candidate operation parameters, comprising:

[0017] It is determined whether the noise reduction distance is greater than or equal to a first distance threshold;

[0018] If the noise reduction distance is greater than or equal to the first distance threshold, a candidate operation parameter corresponding to a minimum compressor frequency range is determined as the target operation parameter from the candidate operation parameters.

[0019] Optionally, the target operation parameter is determined from the candidate operation parameters, comprising:

[0020] It is determined whether the noise reduction distance is less than or equal to a second distance threshold, the second distance threshold being less than the first distance threshold;

[0021] If the noise reduction distance is less than or equal to the second distance threshold, a candidate operation parameter corresponding to a maximum compressor frequency range is determined as the target operation parameter from the candidate operation parameters.

[0022] Optionally, the target operation parameter is determined from the candidate operation parameters, comprising:

[0023] It is determined whether the noise reduction distance is greater than the second distance threshold and less than the first distance threshold, the second distance threshold being less than the first distance threshold;

[0024] If the noise reduction distance is greater than the second distance threshold and less than the first distance threshold, a first total number of adjustable gears corresponding to a total compressor frequency range of the plurality of candidate operation parameters and a second total number of adjustable gears corresponding to a total wind deflector range are acquired;

[0025] The target operation parameter is determined according to the noise reduction distance, and a size relationship between the first total number of adjustable gears and the second total number of adjustable gears.

[0026] Optionally, the target operation parameter is determined according to the noise reduction distance, and a size relationship between the first total number of adjustable gears and the second total number of adjustable gears, comprising:

[0027] If the first total number of adjustable gears is greater than the second total number of adjustable gears, a first difference between the noise reduction distance and the first distance threshold value is determined, and a second difference between the noise reduction distance and the second distance is determined.

[0028] If the first difference is less than the second difference, a minimum value of the total range of compressor frequencies and any fan gear in the total range of air baffle are determined as the target operating parameter.

[0029] Optionally, the target operating parameter is determined according to the noise reduction distance and a size relationship between the first total number of adjustable gears and the second total number of adjustable gears, comprising:

[0030] If the first total number of adjustable gears is less than the second total number of adjustable gears, a first difference between the noise reduction distance and the first distance threshold value is determined, and a second difference between the noise reduction distance and the second distance is determined.

[0031] If the first difference is greater than the second difference, a maximum value of the total range of compressor frequencies and any fan gear in the total range of air baffle are determined as the target operating parameter.

[0032] In a second aspect, the present application provides a unit control device, comprising:

[0033] A first acquisition module is configured to acquire a noise reduction distance between a target position and a heat pump unit and a maximum sound pressure level allowed at the target position.

[0034] A determination module is configured to determine a maximum sound power allowed when the heat pump unit is running according to the noise reduction distance and the maximum sound pressure level.

[0035] A second acquisition module is configured to acquire a target operating parameter allowed for the heat pump unit to run under the maximum sound power.

[0036] A control module is configured to control the heat pump unit to run according to the target operating parameter if a noise reduction trigger signal is detected.

[0037] Optionally, the determination module comprises:

[0038] An acquisition unit is configured to acquire a sound pressure at a target position, a reference sound pressure and an acoustic impedance.

[0039] A calculation unit is configured to calculate the maximum sound power based on the sound pressure, the noise reduction distance, the maximum sound pressure level, the reference sound pressure, the acoustic impedance and a preset sound power calculation formula.

[0040] Optionally, the second acquisition module comprises:

[0041] The first determining unit is configured to determine, based on a preset corresponding relationship between sound power and unit operation parameters, a unit operation parameter corresponding to sound power equal to the maximum sound power as a candidate operation parameter.

[0042] The second determining unit is configured to determine the target operation parameter from the candidate operation parameters.

[0043] Optionally, the second determining unit comprises:

[0044] The first determining subunit is configured to determine whether the noise reduction distance is greater than or equal to a first distance threshold.

[0045] The second determining subunit is configured to, if the noise reduction distance is greater than or equal to the first distance threshold, determine, from the candidate operation parameters, a candidate operation parameter corresponding to a minimum compressor frequency range as the target operation parameter.

[0046] Optionally, the second determining unit comprises:

[0047] The third determining subunit is configured to determine whether the noise reduction distance is less than or equal to a second distance threshold, the second distance threshold being less than the first distance threshold.

[0048] The fourth determining subunit is configured to, if the noise reduction distance is less than or equal to the second distance threshold, determine, from the candidate operation parameters, a candidate operation parameter corresponding to a maximum compressor frequency range as the target operation parameter.

[0049] Optionally, the second determining unit comprises:

[0050] The fifth determining subunit is configured to determine whether the noise reduction distance is greater than the second distance threshold and less than the first distance threshold, the second distance threshold being less than the first distance threshold.

[0051] The obtaining subunit is configured to, if the noise reduction distance is greater than the second distance threshold and less than the first distance threshold, obtain a first total number of adjustable gears corresponding to a total compressor frequency range of the plurality of candidate operation parameters and a second total number of adjustable gears corresponding to a total wind deflector range.

[0052] The sixth determining subunit is configured to determine the target operation parameter according to the noise reduction distance and a size relationship between the first total number of adjustable gears and the second total number of adjustable gears.

[0053] Optionally, the sixth determining subunit is further configured to:

[0054] If the first total number of adjustable gears is greater than the second total number of adjustable gears, determine a first difference between the noise reduction distance and the first distance threshold and a second difference between the noise reduction distance and the second distance.

[0055] If the first difference value is less than the second difference value, the minimum value of the compressor frequency total range and any one of the fan gears in the total range of the air baffle are determined as the target operation parameter.

[0056] Optionally, the sixth determination subunit is further configured to:

[0057] If the first total number of adjustable gears is less than the second total number of adjustable gears, a first difference value of the noise reduction distance and the first distance threshold value is determined, and a second difference value of the noise reduction distance and the second distance;

[0058] If the first difference value is greater than the second difference value, the maximum value of the compressor frequency total range and any one of the fan gears in the total range of the air baffle are determined as the target operation parameter.

[0059] In a third aspect, the present application provides a heat pump unit, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus;

[0060] The memory is used to store a computer program.

[0061] The processor is used to execute the program stored on the memory, and realize the unit control method of any one of the first aspect.

[0062] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0063] The embodiments of the present application determine the maximum sound power allowed by the heat pump unit during operation according to the noise reduction distance and the maximum sound pressure level, then obtain the target operation parameter allowed by the heat pump unit under the condition of the maximum sound power, and can control the refrigeration unit to operate according to the target operation parameter when the noise reduction trigger signal is detected, and then the heat pump unit can operate according to the target operation parameter that maximizes the unit energy efficiency under the premise that the total sound energy radiated is less than the maximum sound power, so as to balance the energy efficiency of the heat pump unit and the quietness or noise reduction, and maximize the unit energy efficiency while reducing noise. BRIEF DESCRIPTION OF DRAWINGS

[0064] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate one embodiment consistent with the present application and, together with the description, serve to explain the principles of the application.

[0065] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings from these drawings without any creative effort.

[0066] Figure 1 A flow chart of a unit control method provided for an embodiment of the present application;

[0067] Figure 2 A schematic diagram of an actual application scenario provided for an embodiment of the present application;

[0068] Figure 3 A flow chart of a unit control method in an actual application provided for an embodiment of the present application; Figure 1 A flow chart of step S103;

[0069] Figure 4 A flow chart of a unit control method in an actual application provided for an embodiment of the present application;

[0070] Figure 5 A structural diagram of a unit control device provided for an embodiment of the present application;

[0071] Figure 6 A heat pump unit provided for an embodiment of the present application. DETAILED DESCRIPTION

[0072] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0073] In some scenarios, the user's attention to the unit noise even exceeds the energy efficiency and the heating and cooling effect. Currently, the mute function of the heat pump unit is mainly achieved by limiting the unit capacity, such as reducing the fan gear and the compressor frequency; but such functions mostly depend on the preset gear and frequency limit value, and the matching degree with the actual noise condition is low, that is, it is difficult to determine whether the preset gear and frequency limit value is reasonable, it is impossible to accurately meet the user's demand in combination with the actual situation, and thus it is difficult to achieve the balance between energy efficiency and mute. Therefore, the embodiments of the present application provide a unit control method, device and heat pump unit, according to the actual installation position of the unit and the user's requirement for the noise value, combining the sound pressure propagation law, the noise limit value and the constraint condition of the actual noise reduction distance are converted into the limitation of the unit load, and then the maximum load allowed by the unit is determined, and the maximum load is used to limit the logical action of the unit, so that the unit avoids running at a frequency or gear outside the sound power range.

[0074] The embodiments of the present application provide a unit control method for noise control of a heat pump unit (such as a heat pump unit) containing a compressor and a fan, as shown in Figure 1 The method comprises:

[0075] In step S101, a noise reduction distance between a target position and a heat pump unit and a maximum sound pressure level allowed at the target position are obtained.

[0076] In the embodiment of the present application, the target position can refer to a position specified by a user and not affected by noise or less affected by noise (acceptable to the user), such as Figure 2 As shown, the noise reduction distance r can refer to the distance between a noise source and a target position where a user does not want to be disturbed by noise, and the unit is m. The maximum sound pressure level is the maximum noise level specified by the user when the heat pump unit (such as a heat pump unit) is running, and the unit is dB.

[0077] In actual application, the noise reduction distance and the maximum sound pressure level can be set through the control panel of the heat pump unit. When the unit is installed, the installer can set the noise reduction distance and the maximum sound pressure level according to the local regulations or the customer demand and the actual installation position of the heat pump unit.

[0078] In step S102, the maximum sound power allowed when the heat pump unit is running is determined according to the noise reduction distance and the maximum sound pressure level.

[0079] In the embodiment of the present application, the sound power refers to the total sound energy radiated by a sound source per second, which is a position-independent quantity, and is usually measured in watts (W). The sound power reflects the characteristics of the sound source itself, rather than the condition of the sound wave reaching a specific position. The maximum sound power is the maximum value of the total sound energy allowed to be radiated by the unit under a specific working condition.

[0080] In this step, the noise reduction distance and the maximum sound pressure level can be brought into a preset sound power calculation formula to obtain the maximum sound power.

[0081] If the sound wave propagates on the spherical surface at a distance r from the sound source, the relationship between the sound pressure p and the sound power W is: SPL=20log 10 and then SPL=20log 10 / p0), the preset sound power calculation formula is as follows:

[0082] W=(10*SPL*p0) 2 *4πr 2 / Z

[0083] where W is the sound power, SPL is the sound pressure level, the sound pressure level is a logarithmic scale based on the reference sound pressure, p is the sound pressure at the target position, p0 is the reference sound pressure, a constant, and usually 20 μ ​Pa, p is a constant, r is the noise reduction distance, Z is the acoustic impedance, and for the case of air, Z≈410 Rayls / m.

[0084] In an embodiment of the present application, the sound pressure at the target position, the reference sound pressure, and the acoustic impedance can be acquired first, wherein the sound pressure refers to the pressure change of the medium (such as air) during the propagation of sound waves. It is a measure of sound intensity, usually measured in pascals (Pa). The measurement of sound pressure is related to the position, that is, the value of sound pressure may be different at different points.

[0085] Then, the maximum sound power is calculated based on the sound pressure, the noise reduction distance, the maximum sound pressure level, the reference sound pressure, the acoustic impedance, and a preset sound power calculation formula. Specifically, the sound pressure, the noise reduction distance, the maximum sound pressure level (SPL in the above preset sound power calculation formula), the reference sound pressure, and the acoustic impedance are brought into the preset sound power calculation formula to obtain the maximum sound power.

[0086] In step S103, the target operating parameter of the heat pump unit allowed to operate under the maximum sound power condition is acquired.

[0087] After the maximum sound power is determined, the target operating parameter of the heat pump unit can be acquired under the condition that the total sound energy radiated by the heat pump unit during operation is equal to the maximum sound power, that is, when the heat pump unit operates according to the target operating parameter, the total sound energy radiated by the heat pump unit is equal to the maximum sound power. In this case, the unit has the highest energy efficiency.

[0088] In step S104, if the noise reduction trigger signal is detected, the heat pump unit is controlled to operate according to the target operating parameter.

[0089] In this step, after the noise reduction trigger signal is detected, the target operating parameter can be transmitted to the heat pump unit, and the compressor and fan of the heat pump unit can operate according to the target operating parameter.

[0090] In an embodiment of the present application, the noise reduction trigger signal can be triggered when the user manually controls the noise reduction function to be turned on.

[0091] In an embodiment of the present application, the noise reduction trigger signal can be triggered when a specified time is reached. In actual applications, the control panel of the heat pump unit can also be provided with several segments of timing mute function start and stop, timing start and end time points, timing target sound pressure level preset limit value, and timing distance. When the system time runs to the timing start time point, the target sound pressure level limit value automatically becomes the timing preset limit value, and when the system runs to the timing end time point, the target sound pressure level limit value automatically returns to the original value. Through this method, the mute requirements of different time periods in a day can be preset according to user requirements, such as the noise requirement cannot be higher than 55 dB during the day, and the noise requirement cannot be higher than 40 dB during the night. Therefore, the start time can be set to 23:00, the end time can be set to 8:00, and the preset value of the timing target sound pressure level can be set to 40 dB. Furthermore, the user can set the timing distance according to the living habits, such as the user has the habit of studying and working in the study room from 20:00 to 22:00, and the study room is close to the unit. Therefore, the start time can be set to 20:00, the timing distance can be shortened, and the end time can be set to 22:00. When the time is from 20:00 to 22:00, the unit recalculates the required load according to the timing distance, and automatically adjusts the mute gear according to the requirements.

[0092] In an embodiment of the present application, a noise sensor can also be added to the heat pump unit to automatically detect the noise value of the current environment of the heat pump unit. If the noise value exceeds the preset noise threshold, the noise reduction trigger signal is triggered.

[0093] In addition, considering the influence of background noise, in the state of not being turned on, the noise value detected by the noise sensor is the background noise. If the current environment is in a low noise state, that is, the current sound pressure level is less than the maximum sound pressure level currently set, the maximum sound power calculated according to the preset maximum sound pressure level and the noise reduction distance is used for operation. Since the noise sensor is generally installed inside the unit, if the detected background noise value is greater than the noise value generated by the unit itself, it indicates that the unit is in a very noisy environment, that is, the current environment is in a high noise state, that is, the current sound pressure level is greater than the maximum sound pressure level currently set. At this time, the unit can be appropriately controlled to break through the maximum sound pressure level for operation (that is, a new maximum sound power is calculated according to the latest maximum sound pressure level after breaking through and the noise reduction distance for operation), and at this time, even if the unit is turned on and runs appropriately to break through the maximum sound pressure level, the noise generated by the unit after the propagation of the unit shell is easily covered by the background noise, and has little impact on the environment. This embodiment can detect the background noise value through the noise sensor, and compensate and correct the maximum sound pressure level through the background noise value, so as to further improve the energy efficiency of the heat pump unit.

[0094] The embodiment of the present application determines the maximum sound power allowed when the heat pump unit is running according to the noise reduction distance and the maximum sound pressure level, then obtains the target running parameter allowed for the heat pump unit to run under the condition of the maximum sound power, and controls the refrigeration unit to run according to the target running parameter when the noise reduction trigger signal is detected, so that the heat pump unit can run according to the target running parameter which makes the unit have the highest energy efficiency under the premise that the total sound energy radiated is less than the maximum sound power, and the balance between the energy efficiency of the heat pump unit and the silence or noise reduction is achieved, and the unit energy efficiency is maximized while the noise is reduced.

[0095] In another embodiment of the present application, as shown in Figure 3 Step S103 obtains the target running parameter allowed for the heat pump unit to run under the condition of the maximum sound power, including:

[0096] Step S201 determines the unit running parameter corresponding to the sound power equal to the maximum sound power as the candidate running parameter based on the preset corresponding relationship between the sound power and the unit running parameter.

[0097] In the embodiment of the present application, according to the unit action logic and the working condition, the sound pressure p n is measured at a position 1 meter away from the unit in each running state of the unit (for example, when the fan gear is 4 gears and the compressor frequency is 50 Hz). The action logic refers to the action content of the unit, such as the compressor running frequency and the fan gear, etc. The working condition refers to the actual environment temperature, the difference between the target temperature and the actual temperature, etc.

[0098] From the relationship p = W between the sound pressure p and the sound power W, it can be known that the sound power W n of the unit can be calculated from the sound pressure p n (wherein n represents a plurality, meaning that the unit can calculate the value of the corresponding sound power in each state by measuring the sound pressure. Combined with different fan gears and different compressor frequencies, n states can be combined), and the corresponding relationship between the sound power and the unit running parameter is obtained.

[0099] In this step, one or more unit running parameters corresponding to the maximum sound power in the corresponding relationship between the sound power and the unit running parameter can be queried as the candidate running parameter.

[0100] In actual running, the compressor frequency and the fan gear included in the unit running parameter corresponding to each sound power are an interval, that is, the unit running parameter includes the compressor frequency range and the fan gear range.

[0101] Step S202 determines the target running parameter in each of the candidate running parameters.

[0102] In this step, the target operation parameter can be determined in one or more candidate operation parameters according to the noise reduction distance and the compressor frequency range, or the target operation parameter can be determined according to the noise reduction distance, the first total number of adjustable gears corresponding to the total range of compressor frequencies, and the second total number of adjustable gears corresponding to the total range of wind baffles.

[0103] Since the unit operation parameters include the compressor frequency range and the fan gear range, the target operation parameters also include the compressor frequency range and the fan gear range. Further, the compressor frequency and the fan gear can be determined according to the temperature difference between the ambient temperature and the target set temperature, so as to control the heat pump unit.

[0104] Since the source of noise is mainly the operation of the compressor and the fan, the compressor noise is derived from mechanical vibration and pneumatic noise, has a wide frequency spectrum, and contains low and high frequencies. The fan noise comes from the vortex noise generated by the interaction between the blade rotation and the air, the friction and collision sound between mechanical parts, and is mainly medium and high frequency. High-frequency noise decays faster with longer transmission distance and is easily covered by environmental noise. Low-frequency noise decays slowly, and environmental noise is mainly high frequency. Therefore, according to the different characteristics of the compressor and fan noise, when the set distance is long, the silent mode can mainly limit the compressor frequency and secondarily limit the fan gear for load adjustment; when the set distance is short, the fan gear / frequency is mainly limited, and the compressor frequency is secondarily limited for load adjustment. The following specific examples are combined for description. Figure 4

[0105] In an embodiment of the present application, step S202 determines the target operation parameter in each of the candidate operation parameters, including:

[0106] Step S301, determining whether the noise reduction distance is greater than or equal to a first distance threshold. For example, the first distance threshold can be 15m.

[0107] Step S302, if the noise reduction distance is greater than or equal to the first distance threshold, in each of the candidate operation parameters, the candidate operation parameter corresponding to the minimum compressor frequency range is determined as the target operation parameter.

[0108] ​For example, when the noise reduction distance r is greater than 15 meters (Rmax), it is determined that the distance is far, and the mute or noise reduction mode can be mainly limited to the compressor frequency and secondarily limited to the fan gear position for load adjustment. Specifically, if the user sets the maximum sound pressure level SPL to 52 dB and the noise reduction distance r to 20 m, the maximum sound power P1 of the unit to be operated in this scenario can be calculated according to the formula in the foregoing embodiment. According to the foregoing correspondence, one or more candidate operating parameters can be found to make the total sound energy emitted by the unit when operating conform to the maximum sound power P1. For example, the candidate operating parameter 1 has a compressor frequency of 54 Hz and a fan gear position of 4 gears, or the candidate operating parameter 2 has a compressor frequency of 48 Hz and a fan gear position of 5 gears, and the maximum sound power corresponding to the candidate operating parameter 1 and the candidate operating parameter 2 is P1. Since r = 20 is determined to be far, the compressor noise has a greater impact on the overall noise, and at this time, the candidate operating parameter 2 with a smaller compressor frequency range can be selected as the target operating parameter for operation, rather than the candidate operating parameter 1.

[0109] In another embodiment of the present application, step S202 determines the target operating parameter from the candidate operating parameters, including:

[0110] Step S401, determining whether the noise reduction distance is less than or equal to a second distance threshold, for example, the second distance threshold can be 5 m, and the second distance threshold is less than the first distance threshold.

[0111] Step S402, if the noise reduction distance is less than or equal to the second distance threshold, determining the candidate operating parameter corresponding to the maximum compressor frequency range as the target operating parameter from the candidate operating parameters.

[0112] For example, when the noise reduction distance r is less than 5 meters (Rmin), it is determined that the distance is short, and the load adjustment is mainly limited to the fan gear / frequency and secondarily limited to the compressor frequency. Specifically, based on the foregoing specific example, if the user sets the noise reduction distance r to be less than 5 meters, the noise of the fan has a greater impact on the overall noise at this time, and the candidate operating parameter 1 with a larger compressor frequency range is selected for operation rather than the candidate operating parameter 2.

[0113] In another embodiment of the present application, step S202 determines the target operating parameter from the candidate operating parameters, including:

[0114] Step S501, determining whether the noise reduction distance is greater than a second distance threshold and less than a first distance threshold, the second distance threshold being less than the first distance threshold;

[0115] In step S502, if the noise reduction distance is greater than the second distance threshold and less than the first distance threshold, a first total number of adjustable gears corresponding to a total range of compressor frequencies of the plurality of candidate operation parameters and a second total number of adjustable gears corresponding to a total range of air baffle gears are obtained.

[0116] In the embodiments of the present application, when the noise reduction distance r is in the moderate section, the load with a large adjustable amplitude can be selected according to the size of the noise reduction distance r for adjustment. Specifically, in the case where the adjustable amplitude of the compressor is greater than the adjustable amplitude of the fan gear, the target operation parameter is determined by fixing the fan gear and adjusting the compressor frequency. In the case where the adjustable amplitude of the compressor is less than the adjustable amplitude of the fan gear, the target operation parameter is determined by fixing the compressor frequency and adjusting the fan gear.

[0117] In step S503, the target operation parameter is determined according to the noise reduction distance and the size relationship between the first total number of adjustable gears and the second total number of adjustable gears.

[0118] In an embodiment of the present application, step S503 of determining the target operation parameter according to the noise reduction distance and the size relationship between the first total number of adjustable gears and the second total number of adjustable gears comprises:

[0119] If the first total number of adjustable gears is greater than the second total number of adjustable gears, a first difference between the noise reduction distance and the first distance threshold and a second difference between the noise reduction distance and the second distance are determined.

[0120] If the first total number of adjustable gears is greater than the second total number of adjustable gears, it can be determined that the adjustable amplitude of the compressor is greater than the adjustable amplitude of the fan gear. At this time, the target operation parameter is determined by fixing the fan gear and adjusting the compressor frequency.

[0121] If the first difference is less than the second difference, the minimum value of the total range of compressor frequencies and any fan gear in the total range of air baffle gears are determined as the target operation parameter.

[0122] For example, the compressor frequency f is 48-54 Hz, the adjustment step is 1 Hz, the air baffle D is 4-5 gears, the adjustment step is 1 gear, the adjustable range of the compressor (i.e. the first total number of adjustable gears) is greater than the adjustable range of the fan (i.e. the second total number of adjustable gears), and the compressor frequency is selected to be adjusted preferentially.

[0123] Specifically, when the noise reduction distance r approaches the 15 m end, the compressor frequency f is adjusted to 48 Hz synchronously, and the fan gear D is maintained at 5 gears or 4 gears. When the noise reduction distance r approaches the 5 m end, the compressor frequency f is adjusted to 54 Hz synchronously, and the fan gear D is maintained at 5 gears or 4 gears.

[0124] In an embodiment of the present application, step S503 determines the target operation parameter according to the noise reduction distance, and the size relationship between the first total adjustable gear number and the second total adjustable gear number, including:

[0125] If the first total adjustable gear number is less than the second total adjustable gear number, a first difference between the noise reduction distance and the first distance threshold value, and a second difference between the noise reduction distance and the second distance are determined.

[0126] If the first total adjustable gear number is less than the second total adjustable gear number, it can be determined that the adjustable range of the compressor is less than the adjustable range of the fan gear, and at this time, the target operation parameter is determined by fixing the compressor frequency and adjusting the fan gear.

[0127] If the first difference is greater than the second difference, the maximum value of the total range of the compressor frequency and any fan gear in the total range of the wind deflector are determined as the target operation parameter.

[0128] For example, the compressor frequency f is 50-52 Hz, the adjustment step is 1 Hz, the wind deflector D is 3-6 gears, the adjustment step is 1 gear, the adjustable range of the compressor (i.e. the first total adjustable gear number) is less than the adjustable range of the fan (i.e. the second total adjustable gear number), and the fan gear is selected to be adjusted preferentially.

[0129] Specifically, when the noise reduction distance r approaches the 15 m end, the compressor frequency f is maintained at 50 Hz, 51 Hz or 52 Hz, and the fan gear D is adjusted to 3 simultaneously. When the noise reduction distance r approaches the 5 m end, the compressor frequency f is maintained at 50 Hz, 51 Hz or 52 Hz, and the fan gear D is adjusted to 6 simultaneously.

[0130] By this method, the unit load can be automatically adjusted according to the actual working condition, so that the noise emitted by the unit does not exceed the limit. Compared with the method of simply limiting the gear and frequency, the energy efficiency of the unit is maximized while ensuring continuous noise reduction.

[0131] In another embodiment of the present application, a unit control device is also provided, as shown in Figure 5 The device includes:

[0132] A first acquisition module 11 is configured to acquire a noise reduction distance between a target position and a heat pump unit and a maximum sound pressure level allowed at the target position.

[0133] A determination module 12 is configured to determine a maximum sound power allowed when the heat pump unit is running according to the noise reduction distance and the maximum sound pressure level.

[0134] The second acquisition module 13 is configured to acquire a target operation parameter of the heat pump unit allowed to operate under the maximum sound power condition.

[0135] The control module 14 is configured to control the heat pump unit to operate according to the target operation parameter if the noise reduction trigger signal is detected.

[0136] Optionally, the determination module comprises:

[0137] The acquisition unit is configured to acquire a sound pressure at a target position, a reference sound pressure, and an acoustic impedance.

[0138] The calculation unit is configured to calculate the maximum sound power based on the sound pressure, the noise reduction distance, the maximum sound pressure level, the reference sound pressure, the acoustic impedance, and a preset sound power calculation formula.

[0139] Optionally, the second acquisition module comprises:

[0140] The first determination unit is configured to determine, based on a preset corresponding relationship between sound power and unit operation parameters, a unit operation parameter corresponding to sound power equal to the maximum sound power as a candidate operation parameter.

[0141] The second determination unit is configured to determine the target operation parameter from the candidate operation parameters.

[0142] Optionally, the second determination unit comprises:

[0143] The first determination subunit is configured to determine whether the noise reduction distance is greater than or equal to a first distance threshold.

[0144] The second determination subunit is configured to determine, if the noise reduction distance is greater than or equal to the first distance threshold, a candidate operation parameter corresponding to a minimum compressor frequency range as the target operation parameter from the candidate operation parameters.

[0145] Optionally, the second determination unit comprises:

[0146] The third determination subunit is configured to determine whether the noise reduction distance is less than or equal to a second distance threshold, the second distance threshold being less than the first distance threshold.

[0147] The fourth determination subunit is configured to determine, if the noise reduction distance is less than or equal to the second distance threshold, a candidate operation parameter corresponding to a maximum compressor frequency range as the target operation parameter from the candidate operation parameters.

[0148] Optionally, the second determination unit comprises:

[0149] The fifth determining sub-unit is configured to determine whether the noise reduction distance is greater than a second distance threshold and less than a first distance threshold, the second distance threshold being less than the first distance threshold.

[0150] The acquisition sub-unit is configured to acquire a first total number of adjustable gears corresponding to a total compressor frequency range of the plurality of candidate operation parameters and a second total number of adjustable gears corresponding to a total air baffle range, if the noise reduction distance is greater than the second distance threshold and less than the first distance threshold.

[0151] The sixth determining sub-unit is configured to determine the target operation parameter according to the noise reduction distance and a size relationship between the first total number of adjustable gears and the second total number of adjustable gears.

[0152] Optionally, the sixth determining sub-unit is further configured to:

[0153] If the first total number of adjustable gears is greater than the second total number of adjustable gears, determine a first difference between the noise reduction distance and the first distance threshold and a second difference between the noise reduction distance and the second distance.

[0154] If the first difference is less than the second difference, determine a minimum value of the total compressor frequency range and any air baffle gear in the total air baffle range as the target operation parameter.

[0155] Optionally, the sixth determining sub-unit is further configured to:

[0156] If the first total number of adjustable gears is less than the second total number of adjustable gears, determine a first difference between the noise reduction distance and the first distance threshold and a second difference between the noise reduction distance and the second distance.

[0157] If the first difference is greater than the second difference, determine a maximum value of the total compressor frequency range and any air baffle gear in the total air baffle range as the target operation parameter.

[0158] In still another embodiment of the present application, a heat pump unit is also provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus.

[0159] The memory is configured to store a computer program.

[0160] The processor is configured to execute the program stored on the memory, so as to implement the unit control method of any of the preceding method embodiments.

[0161] The heat pump unit provided by the embodiment of the present application, the processor determines the maximum sound power allowed when the heat pump unit operates according to the noise reduction distance and the maximum sound pressure level by executing the program stored on the memory, then obtains the target operating parameter allowed for the heat pump unit to operate under the condition of the maximum sound power, and controls the refrigeration unit to operate according to the target operating parameter when the noise reduction trigger signal is detected, so that the heat pump unit can operate according to the target operating parameter which makes the unit have the highest energy efficiency under the premise that the total sound energy radiated is less than the maximum sound power, and the balance between the energy efficiency of the heat pump unit and the silence or noise reduction is achieved, and the unit energy efficiency is maximized while the noise is reduced.

[0162] The communication bus 1140 of the heat pump unit mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus 1140 can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 6 Only one thick line is used to represent the bus in the figure, but it does not mean that there is only one bus or only one type of bus.

[0163] The communication interface 1120 is used for communication between the heat pump unit and other devices.

[0164] The memory 1130 can include a Random Access Memory (RAM) and can also include a non-volatile memory, such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0165] The processor 1110 mentioned above can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0166] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0167] The above description is merely that of the specific embodiments of the application and as such is not to be taken in a limiting sense. Various modifications and co nti n uations will be evident to those skilled in the art that do not depart from the spirit and scope of the application as defined by the appended claims. The scope of the application should be determined by the scope of the appended claims and their equivalents.

Claims

1. A unit control method, characterized in that: The method comprises: Obtaining the noise reduction distance between the target location and the heat pump unit and the maximum sound pressure level allowed at the target location; Determining the maximum sound power allowed during operation of the heat pump unit according to the noise reduction distance and the maximum sound pressure level; Obtaining target operating parameters of the heat pump unit allowed to operate under the maximum sound power condition; Obtaining target operating parameters of the heat pump unit allowed to operate under the maximum sound power condition, including: Based on a preset correspondence between sound power and unit operating parameters, determining the unit operating parameter corresponding to the sound power equal to the maximum sound power as a candidate operating parameter; determining the target operating parameter among the candidate operating parameters; Determining the target operating parameter from the candidate operating parameters includes: Determining whether the noise reduction distance is greater than or equal to a first distance threshold; If the noise reduction distance is greater than or equal to a first distance threshold, determining, among the candidate operating parameters, a candidate operating parameter corresponding to a minimum compressor frequency range as the target operating parameter; If a noise reduction trigger signal is detected, the heat pump unit is controlled to operate according to the target operating parameters.

2. The unit control method according to claim 1, characterized in that: Determining the maximum sound power allowed during operation of the heat pump unit according to the noise reduction distance and the maximum sound pressure level includes: Acquire the sound pressure, reference sound pressure and acoustic impedance at the target position; The maximum sound power is calculated based on the sound pressure, the noise reduction distance, the maximum sound pressure level, the reference sound pressure, the acoustic impedance, and a preset sound power calculation formula.

3. The unit control method according to claim 1, characterized in that: Determining the target operating parameter from the candidate operating parameters includes: determining whether the noise reduction distance is less than or equal to a second distance threshold, the second distance threshold being less than the first distance threshold; If the noise reduction distance is less than or equal to the second distance threshold, the candidate operating parameter corresponding to the maximum compressor frequency range is determined as the target operating parameter among the candidate operating parameters.

4. The unit control method according to claim 1, characterized in that: Determining the target operating parameter from the candidate operating parameters includes: determining whether the noise reduction distance is greater than a second distance threshold and less than a first distance threshold, the second distance threshold being less than the first distance threshold; If the noise reduction distance is greater than the second distance threshold and less than the first distance threshold, obtaining a first total number of adjustable gears corresponding to a total range of compressor frequencies and a second total number of adjustable gears corresponding to a total range of windshields for the plurality of candidate operating parameters; The target operating parameter is determined according to the noise reduction distance and the size relationship between the first total number of adjustable gears and the second total number of adjustable gears.

5. The unit control method according to claim 4, characterized in that: Determining the target operating parameter according to the noise reduction distance and the relationship between the first total number of adjustable gears and the second total number of adjustable gears includes: If the first total number of adjustable gears is greater than the second total number of adjustable gears, determining a first difference between the noise reduction distance and the first distance threshold, and a second difference between the noise reduction distance and the second distance; If the first difference is smaller than the second difference, the minimum value of the total range of the compressor frequency and any fan gear in the total range of the windshield are determined as target operating parameters.

6. The unit control method according to claim 4, characterized in that: Determining the target operating parameter according to the noise reduction distance and the relationship between the first total number of adjustable gears and the second total number of adjustable gears includes: If the first total number of adjustable gears is less than the second total number of adjustable gears, determining a first difference between the noise reduction distance and the first distance threshold, and a second difference between the noise reduction distance and the second distance; If the first difference is greater than the second difference, the maximum value of the total compressor frequency range and any fan gear in the total windshield range are determined as target operating parameters.

7. A unit control device, characterized in that: The device comprises: A first acquisition module is used to obtain the noise reduction distance between the target position and the heat pump unit and the maximum sound pressure level allowed at the target position; A determination module, configured to determine the maximum sound power allowed during operation of the heat pump unit according to the noise reduction distance and the maximum sound pressure level; A second acquisition module is used to obtain target operating parameters that are allowed to operate the heat pump unit under the maximum sound power condition; The second acquisition module includes: a first determining unit, configured to determine, based on a preset correspondence between sound power and unit operating parameters, a unit operating parameter corresponding to a sound power having a sound power equal to the maximum sound power as a candidate operating parameter; a second determining unit, configured to determine the target operating parameter from among the candidate operating parameters; The second determining unit includes: A first determining subunit, configured to determine whether the noise reduction distance is greater than or equal to a first distance threshold; a second determining subunit, configured to determine, if the noise reduction distance is greater than or equal to a first distance threshold, a candidate operating parameter corresponding to a minimum compressor frequency range among the candidate operating parameters as the target operating parameter; The control module is configured to control the heat pump unit to operate according to the target operating parameters if a noise reduction trigger signal is detected.

8. A heat pump unit, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory for storing computer programs; The processor is configured to implement the unit control method according to any one of claims 1 to 6 when executing the program stored in the memory.

Images