Method and device for regulating the rotational speed of a fan

Abstract

The application discloses a fan rotating speed adjusting method and device, relates to the technical field of control, and can improve the rotating speed adjusting accuracy of a fan. The method can be applied to a heat pump system, and the method comprises the following steps: determining whether a variable-frequency fan is in a wind speed correction mode based on a real-time environment temperature; in the case that the variable-frequency fan is in the wind speed correction mode, acquiring an initial expected target rotating speed of the variable-frequency fan, and determining a rotating speed correction coefficient based on a rotating speed correction parameter and a preset correction rule; the rotating speed correction parameter comprises at least one of a real-time working frequency of a compressor, a real-time water inlet temperature of a heat exchanger and a real-time exhaust temperature of the compressor; the heat exchanger is used for heat exchange with water; correcting the initial expected target rotating speed based on the rotating speed correction coefficient to obtain an actual expected target rotating speed, and adjusting a current rotating speed of the variable-frequency fan to the actual expected target rotating speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control, in particular to a fan rotating speed adjusting method and device. BACKGROUND

[0002] At present, there are two kinds of fans for heat pump systems, one is a constant speed fan, and the other is a variable speed fan. Among them, the rotating speed of the constant speed fan is constant, and the rotating speed is not affected by the working condition and is relatively high. Therefore, the energy consumption of the constant speed fan is too high and the noise is large when the unit is running. Therefore, the existing heat pump system generally uses a variable speed fan.

[0003] In the prior art, the variable speed fan adopts direct current frequency conversion technology, provides multiple operating gears, and different operating gears correspond to different rotating speeds to adapt to different working conditions. However, the existing rotating speed control scheme of the variable speed fan can only realize simple hierarchical speed variation according to the environmental temperature, and cannot realize accurate adjustment. Therefore, it is urgent to propose a rotating speed control scheme of the fan with higher adjustment accuracy. SUMMARY

[0004] The present application provides a fan rotating speed adjusting method and device, which can improve the adjustment accuracy of the fan rotating speed.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] In a first aspect, the present application provides a fan rotating speed adjusting method, which can be applied to a heat pump system. The method comprises: determining whether a variable speed fan is in a wind speed correction mode based on a real-time environmental temperature; obtaining an initial expected target rotating speed of the variable speed fan and determining a rotating speed correction coefficient based on a rotating speed correction parameter and a preset correction rule, when the variable speed fan is in the wind speed correction mode; the rotating speed correction parameter comprises at least one of a real-time working frequency of a compressor, a real-time water inlet temperature of a heat exchanger, and a real-time exhaust temperature of the compressor; the heat exchanger is used for heat exchange with water; correcting the initial expected target rotating speed based on the rotating speed correction coefficient to obtain an actual expected target rotating speed, and adjusting the current rotating speed of the variable speed fan to the actual expected target rotating speed.

[0007] In the technical solution provided in the present application, considering that the real-time working frequency of the compressor, the real-time water inlet temperature of the heat exchanger, and the real-time exhaust temperature of the compressor (i.e., the speed correction parameter in the present application) during the operation of the heat pump system will affect the matching accuracy of the speed of the variable frequency fan and the operating condition of the heat pump, therefore, the present application further adjusts the speed of the variable frequency fan based on the speed correction parameter in addition to the existing speed regulation scheme of the variable frequency fan (for example, determining the initial expected target speed based on the ambient temperature). Specifically, after obtaining the initial expected target speed of the variable frequency fan through the existing regulation scheme, the speed correction coefficient is determined based on the speed correction parameter and the preset correction rule, then the initial expected target speed is corrected based on the speed correction coefficient to obtain the actual expected target speed, and the current speed of the variable frequency fan is adjusted to the actual expected target speed. In addition, since the matching accuracy of the speed of the variable frequency fan and the operating condition of the heat pump is not affected by the speed correction parameter under some ambient temperatures, the present application can first determine whether the matching accuracy of the speed of the variable frequency fan and the operating condition of the heat pump is affected by the speed correction parameter under the real-time ambient temperature, if affected, it is determined that the variable frequency fan is in the speed correction mode, and then the initial expected target speed is obtained and corrected.

[0008] In summary, it can be seen that in the technical solution provided in the present application, the speed correction coefficient is determined through the speed correction parameter, and the actual expected target speed is obtained by correcting the initial expected target speed through the speed correction coefficient. Since the speed correction parameter will affect the matching accuracy of the speed of the variable frequency fan and the operating condition of the heat pump, the corrected actual expected target speed can more accurately match the operating condition of the heat pump. Therefore, the present application can improve the regulation accuracy of the fan speed.

[0009] Optionally, the preset correction rule includes a first correction rule, and determining the speed correction coefficient based on the speed correction parameter and the preset correction rule includes: determining the current operating stage of the compressor; and in the case that the current operating stage is an initial starting stage, determining the speed correction coefficient based on the real-time working frequency of the compressor and the first correction rule.

[0010] Optionally, the preset correction rule further includes a second correction rule and a third correction rule, and after determining the current operating stage of the compressor, the method further includes:

[0011] In a case where the current operation stage is the stable operation stage, it is determined whether the real-time exhaust temperature of the compressor meets a predetermined temperature condition; in a case where the real-time exhaust temperature of the compressor meets the temperature condition, the speed correction coefficient is determined based on the real-time water inlet temperature of the heat exchanger and a second correction rule; in a case where the real-time exhaust temperature of the compressor does not meet the temperature condition, the speed correction coefficient is determined based on the real-time water inlet temperature of the heat exchanger, the real-time exhaust temperature of the compressor and a third correction rule.

[0012] Optionally, the first correction rule comprises: determining the speed correction coefficient based on the target operating frequency of the compressor, the real-time operating frequency of the compressor and a predetermined frequency compensation coefficient;

[0013] And / or, the second correction rule comprises: determining, from each first candidate temperature interval, a first target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger, and determining, as the speed correction coefficient, a correction coefficient corresponding to the first target temperature interval;

[0014] And / or, the third correction rule comprises: determining, from each second candidate temperature interval, a second target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger, and determining, from each third candidate temperature interval, a third target temperature interval corresponding to the real-time exhaust temperature of the compressor, and determining, as the speed correction coefficient, a correction coefficient corresponding to the second target temperature interval and the third target temperature interval.

[0015] Optionally, determining whether the variable frequency fan is in the wind speed correction mode based on the real-time environment temperature comprises:

[0016] Determining whether the real-time environment temperature meets a linear temperature control condition corresponding to the current operating mode; wherein the linear temperature control condition is that the real-time environment temperature is greater than or equal to a minimum environment temperature corresponding to the current operating mode and the real-time environment temperature is less than or equal to a maximum environment temperature corresponding to the current operating mode; the current operating mode comprises a heating mode or a cooling mode;

[0017] If the real-time environment temperature meets the linear temperature control condition, it is determined that the variable frequency fan is in the wind speed correction mode.

[0018] Optionally, obtaining an initial expected target speed of the variable frequency fan comprises:

[0019] Determining the initial expected target speed based on the real-time environment temperature, the minimum environment temperature, the maximum environment temperature, a minimum fan speed corresponding to the current operating mode and a maximum fan speed corresponding to the current operating mode.

[0020] Optionally, in a case where the current operating mode is the heating mode, after determining whether the real-time environment temperature meets the linear temperature control condition corresponding to the current operating mode, the method further comprises:

[0021] If the real-time ambient temperature does not satisfy the linear temperature control condition, it is determined whether the real-time ambient temperature is less than the minimum ambient temperature; if the real-time ambient temperature is less than the minimum ambient temperature, the current speed of the variable frequency fan is adjusted based on the maximum fan speed;

[0022] And / or, in the case where the current working mode is the cooling mode, after it is determined whether the real-time ambient temperature satisfies the linear temperature control condition corresponding to the current working mode, the method further comprises:

[0023] If the real-time ambient temperature does not satisfy the linear temperature control condition, it is determined whether the real-time ambient temperature is greater than the maximum ambient temperature; if the real-time ambient temperature is greater than the maximum ambient temperature, the current speed of the variable frequency fan is adjusted based on the maximum fan speed.

[0024] Optionally, in the case where the current working mode is the heating mode, after it is determined whether the real-time ambient temperature is less than the minimum ambient temperature, the method further comprises: if the real-time ambient temperature is greater than the minimum ambient temperature, it is determined whether the real-time ambient temperature is greater than a first temperature; if the real-time ambient temperature is less than or equal to the first temperature, the current speed of the variable frequency fan is adjusted based on the minimum fan speed; if the real-time ambient temperature is greater than the first temperature, the variable frequency fan is controlled to stop running; the first temperature is determined according to the maximum ambient temperature and a first preset temperature;

[0025] And / or, in the case where the current working mode is the cooling mode, after it is determined whether the real-time ambient temperature is greater than the maximum ambient temperature, the method further comprises: if the real-time ambient temperature is less than the maximum ambient temperature, it is determined whether the real-time ambient temperature is less than a second temperature; if the real-time ambient temperature is greater than or equal to the second temperature, the current speed of the variable frequency fan is adjusted based on the minimum fan speed; if the real-time ambient temperature is less than the second temperature, the variable frequency fan is controlled to stop running; the second temperature is determined according to the minimum ambient temperature and a second preset temperature.

[0026] Optionally, in the case where the current working mode is the heating mode, after the variable frequency fan is controlled to stop running, the method further comprises: in the case where it is monitored that the real-time ambient temperature is less than or equal to a third temperature, the variable frequency fan is controlled to restart running; wherein the third temperature is determined according to the first temperature and a third preset temperature.

[0027] And / or, in the case where the current working mode is the cooling mode, after the variable frequency fan is controlled to stop running, the method further comprises: in the case where it is monitored that the real-time ambient temperature is greater than or equal to a fourth temperature, the variable frequency fan is controlled to restart running; wherein the fourth temperature is determined according to the second temperature and a fourth preset temperature.

[0028] In a second aspect, the application provides a device for adjusting a rotational speed of a fan, which is configured in a heat pump system, and the device comprises: a mode determining module configured to determine whether a variable-frequency fan is in a wind speed correction mode based on a real-time ambient temperature; a correction coefficient determining module configured to, in a case where the variable-frequency fan is in the wind speed correction mode, acquire an initial expected target rotational speed of the variable-frequency fan, and determine a rotational speed correction coefficient based on a rotational speed correction parameter and a preset correction rule; the rotational speed correction parameter comprises at least one of a real-time working frequency of a compressor, a real-time water inlet temperature of a heat exchanger, and a real-time exhaust temperature of the compressor; the heat exchanger is configured to exchange heat with water; and a correction adjusting module configured to correct the initial expected target rotational speed based on the rotational speed correction coefficient to obtain an actual expected target rotational speed, and adjust a current rotational speed of the variable-frequency fan to the actual expected target rotational speed.

[0029] Optionally, the preset correction rule comprises a first correction rule, and the correction coefficient determining module is specifically configured to:

[0030] determine a current running stage of the compressor; and in a case where the current running stage is an initial starting stage, determine the rotational speed correction coefficient based on the real-time working frequency of the compressor and the first correction rule.

[0031] Optionally, the preset correction rule further comprises a second correction rule and a third correction rule, and the determining module is further configured to:

[0032] after determining the current running stage of the compressor, in a case where the current running stage is a stable running stage, determine whether the real-time exhaust temperature of the compressor meets a predetermined temperature condition; in a case where the real-time exhaust temperature of the compressor meets the temperature condition, determine the rotational speed correction coefficient based on the real-time water inlet temperature of the heat exchanger and the second correction rule; and in a case where the real-time exhaust temperature of the compressor does not meet the temperature condition, determine the rotational speed correction coefficient based on the real-time water inlet temperature of the heat exchanger, the real-time exhaust temperature of the compressor, and the third correction rule.

[0033] Optionally, the first correction rule comprises: determining the rotational speed correction coefficient based on a target working frequency of the compressor, the real-time working frequency of the compressor, and a predetermined frequency compensation coefficient.

[0034] And / or, the second correction rule comprises: determining a first target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger from each first candidate temperature interval, and determining a correction coefficient corresponding to the first target temperature interval as the rotational speed correction coefficient.

[0035] And / or, the third correction rule comprises: determining a second target temperature interval corresponding to the real-time inlet water temperature of the heat exchanger from the second candidate temperature intervals, and determining a third target temperature interval corresponding to the real-time exhaust temperature of the compressor from the third candidate temperature intervals, and determining a correction coefficient corresponding to the second target temperature interval and the third target temperature interval as the rotation speed correction coefficient.

[0036] Optionally, the mode determining module is specifically configured to:

[0037] determine whether the real-time environment temperature satisfies a linear temperature control condition corresponding to the current working mode, wherein the linear temperature control condition is that the real-time environment temperature is greater than or equal to a minimum environment temperature corresponding to the current working mode and less than or equal to a maximum environment temperature corresponding to the current working mode, and the current working mode comprises a heating mode or a cooling mode;

[0038] if the real-time environment temperature satisfies the linear temperature control condition, determine that the variable frequency fan is in the wind speed correction mode.

[0039] Optionally, the correction coefficient determining module is specifically further configured to: determine the initial expected target rotation speed based on the real-time environment temperature, the minimum environment temperature, the maximum environment temperature, a minimum fan rotation speed corresponding to the current working mode, and a maximum fan rotation speed corresponding to the current working mode.

[0040] Optionally, in the case that the current working mode is the heating mode, the device further comprises a control adjustment module, and the control adjustment module is further configured to: after determining whether the real-time environment temperature satisfies the linear temperature control condition corresponding to the current working mode, if the real-time environment temperature does not satisfy the linear temperature control condition, determine whether the real-time environment temperature is less than the minimum environment temperature, and if the real-time environment temperature is less than the minimum environment temperature, adjust the current rotation speed of the variable frequency fan based on the maximum fan rotation speed.

[0041] And / or, in the case that the current working mode is the cooling mode, the device further comprises a control adjustment module, and the control adjustment module is further configured to: if the real-time environment temperature does not satisfy the linear temperature control condition, determine whether the real-time environment temperature is greater than the maximum environment temperature, and if the real-time environment temperature is greater than the maximum environment temperature, adjust the current rotation speed of the variable frequency fan based on the maximum fan rotation speed.

[0042] Optionally, in the case that the current working mode is the heating mode, the control adjustment module is further configured to: after determining whether the real-time environment temperature is less than the minimum environment temperature, if the real-time environment temperature is greater than the minimum environment temperature, determine whether the real-time environment temperature is greater than a first temperature, if the real-time environment temperature is less than or equal to the first temperature, adjust the current rotation speed of the variable frequency fan based on the minimum fan rotation speed, and if the real-time environment temperature is greater than the first temperature, control the variable frequency fan to stop running, and the first temperature is determined according to the maximum environment temperature and a first preset temperature.

[0043] And / or, in a case where the current working mode is the cooling mode, the control adjustment module is further configured to: after determining whether the real-time ambient temperature is greater than the maximum ambient temperature, if the real-time ambient temperature is less than the maximum ambient temperature, determining whether the real-time ambient temperature is less than a second temperature; if the real-time ambient temperature is greater than or equal to the second temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; if the real-time ambient temperature is less than the second temperature, controlling the variable frequency fan to stop running; and the second temperature is determined according to the minimum ambient temperature and a second preset temperature.

[0044] Optionally, in a case where the current working mode is the heating mode, the control adjustment module is further configured to, after controlling the variable frequency fan to stop running, in a case where it is monitored that the real-time ambient temperature is less than or equal to a third temperature, controlling the variable frequency fan to restart running; wherein the third temperature is determined according to the first temperature and a third preset temperature.

[0045] And / or, in a case where the current working mode is the cooling mode, the control adjustment module is further configured to, after controlling the variable frequency fan to stop running, in a case where it is monitored that the real-time ambient temperature is greater than or equal to a fourth temperature, controlling the variable frequency fan to restart running; wherein the fourth temperature is determined according to the second temperature and a fourth preset temperature.

[0046] The description of the second aspect in the present application can refer to the detailed description of the first aspect; and the beneficial effects of the description of the second aspect can refer to the beneficial effect analysis of the first aspect, which will not be repeated here.

[0047] In the present application, the names of the above-mentioned devices or functional modules do not constitute a limitation, and in actual implementation, these devices or functional modules can appear with other names. As long as the functions of each device or functional module are similar to those in the present application, they belong to the scope of the present application and its equivalent technologies.

[0048] These aspects or other aspects of the present application will be more apparent in the following description. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 A structural schematic diagram of a heat pump system provided by an embodiment of the present application;

[0050] Figure 2 A flowchart of a method for adjusting a fan rotating speed provided by an embodiment of the present application;

[0051] Figure 3 A flowchart of another method for adjusting a fan rotating speed provided by an embodiment of the present application;

[0052] Figure 4A flowchart of another method for adjusting the rotation speed of a fan is provided in the embodiments of the present application.

[0053] Figure 5 A structural diagram of a device for adjusting the rotation speed of a fan is provided in the embodiments of the present application. DETAILED DESCRIPTION

[0054] The method and device for adjusting the rotation speed of a fan provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0055] The term "and / or" in the present document merely describes an association relationship of associated objects, and indicates that there can be three relationships, for example, A and / or B can represent three cases of A alone, A and B together, and B alone.

[0056] The terms "first" and "second" and the like in the description of the present application and the accompanying drawings are used to distinguish different objects or different treatments of the same object, and are not used to describe a specific order of the objects.

[0057] In addition, the terms "comprising" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but can optionally include other steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0058] It should be noted that in the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Rather, the use of the words "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0059] In the description of the present application, unless otherwise specified, "a plurality of" means two or more.

[0060] At present, the fan of the heat pump system mainly has two kinds, one is a constant speed fan, and the other is a variable frequency fan with adjustable rotating speed. Among them, the rotating speed of the constant speed fan is a constant rotating speed, and the rotating speed is not affected by the working condition and is relatively high. In this way, the energy consumption of the constant speed fan is too high and the noise is large when the unit is running. Based on this, the existing heat pump system generally uses a variable frequency fan. In the prior art, the variable frequency fan adopts a direct current variable frequency technology, and a plurality of operating gears are provided, and different operating gears correspond to different rotating speeds to adapt to different working conditions. However, the existing rotating speed regulation scheme of the variable frequency fan can only realize simple level variable speed according to the environmental temperature, and cannot realize accurate regulation. Therefore, it is urgent to propose a fan rotating speed regulation scheme with higher regulation accuracy.

[0061] In view of the problems existing in the prior art, the embodiment of the present application provides a fan rotating speed regulation method. The method determines a rotating speed correction coefficient through a rotating speed correction parameter, and corrects an initial expected target rotating speed through the rotating speed correction coefficient to obtain an actual expected target rotating speed. The corrected actual expected target rotating speed can more accurately match the heat pump operating condition. Therefore, the present application can improve the regulation accuracy of the fan rotating speed.

[0062] The fan rotating speed regulation method provided by the embodiment of the present application can be executed by the fan rotating speed regulation device provided by the embodiment of the present application. The device can be realized by software and / or hardware, and integrated in an electronic device executing the method. For example, the electronic device can be a main control chip in a heat pump system.

[0063] The fan rotating speed regulation method provided by the embodiment of the present application can be applied to a heat pump system. For example, the heat pump system can be a heat pump system as shown in Figure 1 FIG. 1 is a structural schematic diagram of a heat pump system provided by the embodiment of the present application. The working mode of the heat pump system can be a heating mode, Figure 1 The direction of the arrow in the figure is the flow direction of the refrigerant in the heating mode. As Figure 1 shown, the heat pump system includes a compressor, a high-pressure switch, a four-way valve, a heat exchanger, a liquid accumulator, an expansion valve, an evaporator, a variable frequency fan, and a low-pressure switch. The working principle of the heat pump system in the heating mode is as follows: the compressor compresses the refrigerant into a high-temperature and high-pressure gas, which is pumped to the heat exchanger (serving as a condenser) through the D port and the C port of the four-way valve; the heat exchanger can exchange heat with the pumped gas and water to convert it into a gas-liquid mixture; the gas-liquid mixture can be throttled and depressurized through the liquid accumulator and the expansion valve, and then sent to the evaporator, which exchanges heat with the outside air through the variable frequency fan to absorb heat from the air; then, the refrigerant can return to the compressor through the E port and the S port of the four-way valve to form a cycle. The rotating speed of the variable frequency fan directly affects the heat exchange efficiency of the heat pump system, so the regulation of the rotating speed of the variable frequency fan directly affects the performance of the entire heat pump system.

[0064] It should be noted that, Figure 1 The heat pump system shown in the embodiments of the present application is only one common heat pump system in the prior art, and does not constitute a structural limitation on the heat pump system. In actual applications, the heat pump system can also have other structures. In addition, Figure 1 Only the key equipment of the heat pump system is introduced in the embodiments of the present application. In actual applications, the heat pump system can also include other equipment, such as a master control chip.

[0065] The method for adjusting the rotation speed of the fan provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

[0066] Referring to Figure 2 , the method for adjusting the rotation speed of the fan provided by the embodiments of the present application includes S201-S203:

[0067] S201, determining whether the variable frequency fan is in a wind speed correction mode based on a real-time environment temperature.

[0068] In one possible implementation, as Figure 1 shown, a temperature sensor can be arranged at the evaporator to collect the real-time environment temperature. For example, after the real-time environment temperature is obtained, it can be determined based on a pre-set rule whether the rotation speed correction parameter will affect the matching accuracy of the rotation speed of the variable frequency fan and the heat pump operating condition under the real-time environment temperature. If it affects, it is determined that the variable frequency fan is in the wind speed correction mode. If it does not affect, it is determined that the variable frequency fan is not in the wind speed correction mode.

[0069] Among them, the rotation speed correction parameter includes at least one of the real-time working frequency of the compressor, the real-time water inlet temperature of the heat exchanger, and the real-time exhaust temperature of the compressor; for example, as Figure 1 shown, a temperature sensor can be arranged at the water inlet pipe of the heat exchanger to collect the real-time water inlet temperature of the heat exchanger, and a temperature sensor can be arranged at the exhaust position of the compressor to collect the real-time exhaust temperature of the compressor. The heat exchanger is used for heat exchange with water, as Figure 1 shown, in the heating mode, the heat exchanger can be a condenser.

[0070] Optionally, determining whether the variable frequency fan is in the wind speed correction mode based on the real-time environment temperature includes: determining whether the real-time environment temperature meets a linear temperature control condition corresponding to the current working mode; if the real-time environment temperature meets the linear temperature control condition, it is determined that the variable frequency fan is in the wind speed correction mode.

[0071] The linear temperature control condition is that the real-time environment temperature is greater than or equal to the minimum environment temperature corresponding to the current working mode and less than or equal to the maximum environment temperature corresponding to the current working mode. The current working mode includes a heating mode or a cooling mode. For example, the minimum environment temperature corresponding to the heating mode is 10°, and the maximum environment temperature corresponding to the heating mode is 30°. In actual application, the minimum environment temperature corresponding to the heating mode and the minimum environment temperature corresponding to the cooling mode can be the same or different, and the maximum environment temperature corresponding to the heating mode and the maximum environment temperature corresponding to the cooling mode can be the same or different. The maximum environment temperature and the minimum environment temperature under different working modes are adaptively set by the staff according to the application scenario of the heat pump system, and the embodiments of the present application do not limit this.

[0072] In the embodiments of the present application, whether the speed correction parameter will affect the matching accuracy of the speed of the variable frequency fan and the operating condition of the heat pump can be tested in advance under different environment temperatures, and the linear temperature control condition is obtained through the test. In this way, during the operation of the heat pump system, it can be quickly determined whether the variable frequency fan is in the wind speed correction mode according to the linear temperature control condition, thereby further improving the overall performance of the heat pump system.

[0073] S202, in the case that the variable frequency fan is in the wind speed correction mode, obtaining an initial expected target speed of the variable frequency fan, and determining a speed correction coefficient based on the speed correction parameter and a preset correction rule.

[0074] The initial expected target speed can be a speed obtained by an existing speed control scheme for the variable frequency fan, for example, different environment temperature intervals correspond to different initial expected target speeds.

[0075] Optionally, obtaining the initial expected target speed of the variable frequency fan includes: determining the initial expected target speed based on the real-time environment temperature, the minimum environment temperature, the maximum environment temperature, the minimum fan speed corresponding to the current working mode, and the maximum fan speed corresponding to the current working mode.

[0076] In the heating mode, the minimum environment temperature corresponds to the maximum fan speed, and the maximum environment temperature corresponds to the minimum fan speed. In the cooling mode, the maximum environment temperature corresponds to the maximum fan speed, and the minimum environment temperature corresponds to the minimum fan speed.

[0077] In one possible implementation, the initial expected target speed can be determined by an interpolation method. For example, in the heating mode, the initial expected target speed n1 can be determined by the following expression (1), and in the cooling mode, the initial expected target speed n1 can be determined by the following expression (2):

[0078]

[0079] wherein, t1 represents the real-time ambient temperature, t2 represents the minimum ambient temperature in the heating mode, t3 represents the maximum ambient temperature in the heating mode, n2 represents the maximum fan speed in the heating mode, n3 represents the minimum fan speed in the heating mode, t4 represents the minimum ambient temperature in the cooling mode, t5 represents the maximum ambient temperature in the cooling mode, n4 represents the maximum fan speed in the cooling mode, and n5 represents the minimum fan speed in the cooling mode.

[0080] The existing speed regulation scheme of the variable frequency fan can only realize simple hierarchical speed regulation according to the ambient temperature, and cannot realize accurate regulation of the variable frequency fan speed. In the embodiment of the present application, the minimum ambient temperature, the maximum ambient temperature, the minimum fan speed, and the maximum fan speed can be combined to determine a more accurate initial expected target speed by interpolation method, so as to realize stepless regulation of the variable frequency fan speed.

[0081] The preset correction rule can be a rule for determining the speed correction coefficient according to the speed correction parameter. In a possible implementation, different speed correction parameters can correspond to different speed correction coefficients.

[0082] Optionally, the preset correction rule includes a first correction rule, and the speed correction coefficient is determined based on the speed correction parameter and the preset correction rule, including: determining the current operating stage of the compressor; in the case that the current operating stage is an initial start-up stage, determining the speed correction coefficient based on the real-time working frequency of the compressor and the first correction rule.

[0083] In a possible implementation, the first correction rule includes: determining the speed correction coefficient based on the target working frequency of the compressor, the real-time working frequency of the compressor, and a predetermined frequency compensation coefficient. For example, the speed correction coefficient b can be determined by the following expression (3):

[0084] b=1-(a*(1-fc / fm))(3)

[0085] wherein, fc represents the real-time working frequency of the compressor, fm represents the target working frequency of the compressor, and a represents the frequency compensation coefficient, for example, a can be between 0.6 and 1.

[0086] In the initial start-up phase of the compressor, as the real-time working frequency of the compressor is continuously increasing, the real-time working frequency is getting closer to the target working frequency of the compressor. As can be seen from expression (3), as fc is getting closer to fm, the speed correction coefficient b is getting larger, and the speed correction coefficient b is a value greater than 0 and less than 1. Then, if the initial expected target speed is corrected based on the speed correction coefficient b to obtain the actual expected target speed, as the real-time working frequency of the compressor is continuously increasing, the actual expected target speed will also be getting larger, gradually approaching the initial expected target speed. When the real-time working frequency reaches the target working frequency, the actual expected target speed also reaches the initial expected target speed. Wherein, the actual expected target speed = the initial expected target speed * b. For example, if a = 1, fc / fm = 0.1, then b = 0.1, when fc increases to fc / fm = 1, b = 1, and the actual expected target speed reaches the initial expected target speed.

[0087] In the embodiment of the application, it is considered that in the initial start-up phase of the compressor, the frequency of the compressor is unstable, and if the initial expected target speed is directly used as the actual expected target speed in this phase, energy will be wasted (specifically, in this phase, the real-time working frequency of the compressor is continuously increasing, and if the fixed initial expected target speed is directly used for operation, the speed cannot be adapted to the real-time working frequency, and a part of the fan energy of the heat pump system cannot be utilized). Therefore, in the case that the current operation phase is the initial start-up phase, the speed correction coefficient can be determined in combination with the real-time working frequency of the compressor, so that the fan speed can be well adapted to the real-time working frequency of the compressor, and the overall performance of the heat pump system is improved.

[0088] Optionally, the preset correction rule further includes a second correction rule and a third correction rule, and after determining the current operation phase of the compressor, the method further includes: in the case that the current operation phase is a stable running phase, determining whether the real-time exhaust temperature of the compressor meets a pre-determined temperature condition; in the case that the real-time exhaust temperature of the compressor meets the temperature condition, determining the speed correction coefficient based on the real-time water inlet temperature of the heat exchanger and the second correction rule; in the case that the real-time exhaust temperature of the compressor does not meet the temperature condition, determining the speed correction coefficient based on the real-time water inlet temperature of the heat exchanger, the real-time exhaust temperature of the compressor, and the third correction rule.

[0089] The temperature condition can be a pre-determined condition, for example, the temperature condition can be that the real-time exhaust temperature of the compressor is in a pre-set temperature range.

[0090] In a possible implementation, the second correction rule comprises: determining a first target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger from the first candidate temperature intervals, and determining the correction coefficient corresponding to the first target temperature interval as the rotation speed correction coefficient.

[0091] For example, the first candidate temperature intervals can include three temperature intervals of [5℃-20℃), [20℃-40℃), and [40℃-60℃], and the three temperature intervals correspond to different correction coefficients A1, A2, and A3.

[0092] The real-time water inlet temperature of the heat exchanger is an important operating parameter in the heat pump system, and also affects the heat exchange efficiency of the heat pump system. Based on this, in the embodiment of the application, the initial expected target rotation speed can be corrected in combination with the real-time water inlet temperature of the heat exchanger after the compressor is stably running, so as to improve the heat exchange efficiency of the heat pump system. For example, in the heating mode, the higher the real-time water inlet temperature of the heat exchanger, the smaller the temperature difference inside the heat exchanger, and the less the heat absorbed, and the less the heat exchange amount. At this time, the fan rotation speed can be increased by correcting the initial expected target rotation speed, so as to increase the heat exchange amount between the evaporator and the outside air, and realize the matching of the working condition.

[0093] In a possible implementation, the third correction rule comprises: determining a second target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger from the second candidate temperature intervals, and determining a third target temperature interval corresponding to the real-time discharge temperature of the compressor from the third candidate temperature intervals, and determining the correction coefficient corresponding to the second target temperature interval and the third target temperature interval as the rotation speed correction coefficient.

[0094] The first candidate temperature intervals, the second candidate temperature intervals, and the third candidate temperature intervals are all temperature intervals set in advance; the second candidate temperature intervals can be the same as or different from the first candidate temperature intervals.

[0095] The rotation speed correction coefficient=A*B, wherein A represents the correction coefficient corresponding to the second target temperature interval, and B represents the correction coefficient corresponding to the third target temperature interval.

[0096] In the embodiment of the application, in the complex working condition (the real-time discharge temperature of the compressor does not meet the temperature condition), the initial expected target rotation speed can be corrected in combination with the real-time discharge temperature of the compressor and the real-time water inlet temperature of the heat exchanger, so that the exhaust gas superheat degree can be maintained within a reasonable range, the stability of the heat pump system can be ensured, and the long-term reliability of the heat pump system can be improved.

[0097] Optionally, in the case that the current working mode is the heating mode, after determining whether the real-time environment temperature satisfies the linear temperature control condition corresponding to the current working mode, the method further comprises: if the real-time environment temperature does not satisfy the linear temperature control condition, determining whether the real-time environment temperature is less than the minimum environment temperature; if the real-time environment temperature is less than the minimum environment temperature, adjusting the current rotating speed of the variable frequency fan based on the maximum fan rotating speed; and / or, in the case that the current working mode is the cooling mode, after determining whether the real-time environment temperature satisfies the linear temperature control condition corresponding to the current working mode, the method further comprises: if the real-time environment temperature does not satisfy the linear temperature control condition, determining whether the real-time environment temperature is greater than the maximum environment temperature; if the real-time environment temperature is greater than the maximum environment temperature, adjusting the current rotating speed of the variable frequency fan based on the maximum fan rotating speed.

[0098] In the heating mode, when the real-time environment temperature is less than the minimum environment temperature, the temperature difference is large, which indicates that the heat provided by the environment to the heat pump system is less, at this time, the rotating speed of the fan can be adjusted to the maximum to increase the heat exchange efficiency between the evaporator and the environment. Conversely, in the cooling mode, when the real-time environment temperature is greater than the maximum environment temperature, the temperature difference is large, at this time, the rotating speed of the fan can be adjusted to the maximum to increase the heat exchange efficiency between the evaporator and the environment.

[0099] Optionally, in the case that the current working mode is the heating mode, after determining whether the real-time environment temperature is less than the minimum environment temperature, the method further comprises: if the real-time environment temperature is greater than the minimum environment temperature, determining whether the real-time environment temperature is greater than a first temperature; if the real-time environment temperature is less than or equal to the first temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; if the real-time environment temperature is greater than the first temperature, controlling the variable frequency fan to stop running; the first temperature is determined according to the maximum environment temperature and a first preset temperature; and / or, in the case that the current working mode is the cooling mode, after determining whether the real-time environment temperature is greater than the maximum environment temperature, the method further comprises: if the real-time environment temperature is less than the maximum environment temperature, determining whether the real-time environment temperature is less than a second temperature; if the real-time environment temperature is greater than or equal to the second temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; if the real-time environment temperature is less than the second temperature, controlling the variable frequency fan to stop running; the second temperature is determined according to the minimum environment temperature and a second preset temperature.

[0100] The first temperature = the maximum environment temperature + the first preset temperature, and the first preset temperature can be a pre-set stop-fan temperature difference corresponding to the heating mode. The second temperature = the minimum environment temperature - the second preset temperature, and the first preset temperature can be a pre-set stop-fan temperature difference corresponding to the cooling mode.

[0101] In the heating mode, if the real-time environment temperature does not satisfy the linear temperature control condition and is greater than the minimum environment temperature, it indicates that the real-time environment temperature is greater than the maximum environment temperature, if the real-time environment temperature is greater than the maximum environment temperature, it indicates that the environment temperature is already high enough, that is, the heat that can be absorbed from the environment by the heat pump system is already high enough, and there is no need to speed up the air flow rate, at this time, the fan speed can be adjusted to the minimum, reducing the heat exchange efficiency between the evaporator and the environment. In addition, if the real-time environment temperature is greater than the maximum environment temperature and less than or equal to the first temperature, it indicates that although the real-time environment temperature is very high, it is still within the error allowable range of the maximum environment temperature, and the minimum fan speed can still be used. However, if the real-time environment temperature exceeds the error allowable range of the maximum environment temperature, that is, the real-time environment temperature is greater than the first temperature, the variable frequency fan can be directly controlled to stop running. The control and adjustment principle of the cooling mode is similar to that of the heating mode, which can be referred to the control and adjustment principle of the heating mode and will not be described in detail.

[0102] Optionally, in the case where the current working mode is the heating mode, after the variable frequency fan is controlled to stop running, the method further comprises: controlling the variable frequency fan to restart running in the case where the real-time environment temperature is less than or equal to the third temperature; wherein the third temperature is determined according to the first temperature and a third preset temperature; and / or, in the case where the current working mode is the cooling mode, after the variable frequency fan is controlled to stop running, the method further comprises: controlling the variable frequency fan to restart running in the case where the real-time environment temperature is greater than or equal to the fourth temperature; wherein the fourth temperature is determined according to the second temperature and a fourth preset temperature.

[0103] In a possible implementation, the third temperature = the first temperature - the third preset temperature, and the third preset temperature can be a pre-set wind stop return difference corresponding to the heating mode; the fourth temperature = the second temperature + the fourth preset temperature, and the fourth preset temperature can be a pre-set wind stop return difference corresponding to the cooling mode.

[0104] In the heating mode, after the variable frequency fan stops running, the real-time environment temperature will gradually decrease, when it decreases to the first temperature, the variable frequency fan needs to be restarted, because the adjustment feedback needs a certain time, therefore, in the embodiment of the application, the wind stop return difference can be set to start the variable frequency fan in advance before it decreases to the first temperature, so as to offset the error of the adjustment feedback. The restarting process of the cooling mode is similar to that of the heating mode, which can be referred to the restarting process of the heating mode and will not be described in detail.

[0105] S203, correcting the initial expected target speed based on the speed correction coefficient to obtain an actual expected target speed, and adjusting the current speed of the variable frequency fan to the actual expected target speed.

[0106] For example, the actual expected target speed = the initial expected target speed * the speed correction coefficient.

[0107] In a possible implementation, when adjusting the current rotating speed of the variable frequency fan to the actual expected target rotating speed, the current rotating speed of the variable frequency fan can be directly adjusted to the actual expected target rotating speed at one time, or the current rotating speed of the variable frequency fan can be adjusted to the actual expected target rotating speed through multiple adjustments in a step-by-step manner.

[0108] In the method for adjusting the rotating speed of the fan provided in the embodiments of the present application, it is considered that the real-time working frequency of the compressor, the real-time water inlet temperature of the heat exchanger, and the real-time exhaust temperature of the compressor (i.e., the rotating speed correction parameter in the present application) during the operation of the heat pump system will affect the matching accuracy of the rotating speed of the variable frequency fan and the heat pump operation condition. Therefore, on the basis of the existing rotating speed control scheme of the variable frequency fan (for example, determining the initial expected target rotating speed based on the ambient temperature), the rotating speed of the variable frequency fan is further adjusted in combination with the rotating speed correction parameter. Specifically, after the initial expected target rotating speed of the variable frequency fan is obtained through the existing control scheme, the rotating speed correction coefficient is determined based on the rotating speed correction parameter and a preset correction rule. Then, the initial expected target rotating speed is corrected based on the rotating speed correction coefficient to obtain the actual expected target rotating speed, and the current rotating speed of the variable frequency fan is adjusted to the actual expected target rotating speed. In addition, since the matching accuracy of the rotating speed of the variable frequency fan and the heat pump operation condition is not affected by the rotating speed correction parameter under some ambient temperatures, it is determined whether the matching accuracy of the rotating speed of the variable frequency fan and the heat pump operation condition is affected by the rotating speed correction parameter under the real-time ambient temperature. If affected, it is determined that the variable frequency fan is in the rotating speed correction mode, and then the initial expected target rotating speed is obtained and corrected.

[0109] As can be seen, in the technical scheme provided in the present application, the rotating speed correction coefficient is determined through the rotating speed correction parameter, and the initial expected target rotating speed is corrected to obtain the actual expected target rotating speed through the rotating speed correction coefficient. Since the rotating speed correction parameter will affect the matching accuracy of the rotating speed of the variable frequency fan and the heat pump operation condition, the corrected actual expected target rotating speed can more accurately match the heat pump operation condition. Therefore, the present application can improve the adjustment accuracy of the rotating speed of the fan.

[0110] In summary, as shown in Figure 3 The embodiments of the present application also provide a method for adjusting the rotating speed of a fan, which can be applied to the heat pump system as shown in Figure 1 That is, the method for adjusting the rotating speed of a fan provided in the present application is applied to the heat pump system as shown in Figure 3 The method for adjusting the rotating speed of a fan provided in the present application is applied to the heat pump system as shown in

[0111] S300, obtaining the current working mode of the heat pump system.

[0112] S301, determine whether the real-time ambient temperature meets the linear temperature control condition corresponding to the current working mode.

[0113] If it is determined that the real-time ambient temperature meets the linear temperature control condition corresponding to the current working mode, step S302 is performed; if it is determined that the real-time ambient temperature does not meet the linear temperature control condition corresponding to the current working mode, step S307 is performed.

[0114] S302, determine that the variable frequency fan is in the wind speed correction mode, and determine the initial expected target speed based on the real-time ambient temperature, the minimum ambient temperature, the maximum ambient temperature, the minimum fan speed corresponding to the current working mode, and the maximum fan speed corresponding to the current working mode.

[0115] S303, determine whether the current running stage of the compressor is the initial start-up stage.

[0116] If the current running stage is the initial start-up stage, step S304 is performed; if the current running stage is the stable running stage, step S305 is performed.

[0117] S304, determine the speed correction coefficient based on the real-time working frequency of the compressor and the first correction rule.

[0118] After step S304, step S306 is performed.

[0119] S305, determine whether the real-time exhaust gas temperature of the compressor meets the predetermined temperature condition; if the real-time exhaust gas temperature of the compressor meets the temperature condition, determine the speed correction coefficient based on the real-time water inlet temperature of the heat exchanger and the second correction rule; if the real-time exhaust gas temperature of the compressor does not meet the temperature condition, determine the speed correction coefficient based on the real-time water inlet temperature of the heat exchanger, the real-time exhaust gas temperature of the compressor, and the third correction rule.

[0120] S306, correct the initial expected target speed based on the speed correction coefficient to obtain the actual expected target speed, and adjust the current speed of the variable frequency fan to the actual expected target speed.

[0121] S307, determine whether the real-time ambient temperature is less than the minimum ambient temperature; if the real-time ambient temperature is less than the minimum ambient temperature, adjust the current speed of the variable frequency fan based on the maximum fan speed; if the real-time ambient temperature is greater than the minimum ambient temperature, determine whether the real-time ambient temperature is greater than the first temperature; if the real-time ambient temperature is less than or equal to the first temperature, adjust the current speed of the variable frequency fan based on the minimum fan speed; if the real-time ambient temperature is greater than the first temperature, control the variable frequency fan to stop running.

[0122] S308, in the case that the real-time ambient temperature is less than or equal to the third temperature, controlling the variable frequency fan to restart operation.

[0123] As Figure 4 shown, the embodiment of the present application also provides a method for adjusting the rotating speed of the fan, the corresponding current working mode of the method being the refrigeration mode, the method comprising:

[0124] S400, acquiring the current working mode of the heat pump system.

[0125] S401, determining whether the real-time ambient temperature satisfies the linear temperature control condition corresponding to the current working mode.

[0126] In the case that the real-time ambient temperature satisfies the linear temperature control condition corresponding to the current working mode, step S402 is executed; in the case that the real-time ambient temperature does not satisfy the linear temperature control condition corresponding to the current working mode, step S407 is executed.

[0127] S402, determining that the variable frequency fan is in the wind speed correction mode, and determining the initial expected target rotating speed based on the real-time ambient temperature, the minimum ambient temperature, the maximum ambient temperature, the minimum fan rotating speed corresponding to the current working mode, and the maximum fan rotating speed corresponding to the current working mode.

[0128] S403, determining whether the current operating stage of the compressor is the initial start-up stage.

[0129] In the case that the current operating stage is the initial start-up stage, step S404 is executed; in the case that the current operating stage is the stable operation stage, step S405 is executed.

[0130] S404, determining the rotating speed correction coefficient based on the real-time working frequency of the compressor and the first correction rule.

[0131] After step S404, step S406 is executed.

[0132] S405, determining whether the real-time exhaust gas temperature of the compressor satisfies the predetermined temperature condition; in the case that the real-time exhaust gas temperature of the compressor satisfies the temperature condition, determining the rotating speed correction coefficient based on the real-time water inlet temperature of the heat exchanger and the second correction rule; in the case that the real-time exhaust gas temperature of the compressor does not satisfy the temperature condition, determining the rotating speed correction coefficient based on the real-time water inlet temperature of the heat exchanger, the real-time exhaust gas temperature of the compressor, and the third correction rule.

[0133] S406, correcting the initial expected target rotating speed based on the rotating speed correction coefficient to obtain the actual expected target rotating speed, and adjusting the current rotating speed of the variable frequency fan to the actual expected target rotating speed.

[0134] S407, determining whether the real-time ambient temperature is greater than the maximum ambient temperature; if the real-time ambient temperature is greater than the maximum ambient temperature, adjusting the current rotating speed of the variable frequency fan based on the maximum fan rotating speed; if the real-time ambient temperature is less than the maximum ambient temperature, determining whether the real-time ambient temperature is less than the second temperature; if the real-time ambient temperature is greater than or equal to the second temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; if the real-time ambient temperature is less than the second temperature, controlling the variable frequency fan to stop running.

[0135] S408, in the case that it is monitored that the real-time ambient temperature is greater than or equal to the fourth temperature, controlling the variable frequency fan to restart running.

[0136] As shown in the method embodiment, the present application embodiment further provides a fan rotating speed adjusting device configured in a heat pump system, which can include: a mode determining module 11, a correction coefficient determining module 21, and a correction adjusting module 31. Figure 5

[0137] The mode determining module 11 performs S101 in the above method embodiment, the correction coefficient determining module 21 performs S102 in the above method embodiment, and the correction adjusting module 31 performs S103 in the above method embodiment.

[0138] Specifically, the mode determining module 11 is configured to determine whether the variable frequency fan is in a wind speed correction mode based on a real-time ambient temperature; the correction coefficient determining module 21 is configured to, in the case that the variable frequency fan is in the wind speed correction mode, acquire an initial expected target rotating speed of the variable frequency fan, and determine a rotating speed correction coefficient based on a rotating speed correction parameter and a preset correction rule; the rotating speed correction parameter includes at least one of a real-time working frequency of a compressor, a real-time water inlet temperature of a heat exchanger, and a real-time exhaust temperature of the compressor; the heat exchanger is configured to exchange heat with water; and the correction adjusting module 31 is configured to correct the initial expected target rotating speed based on the rotating speed correction coefficient to obtain an actual expected target rotating speed, and adjust a current rotating speed of the variable frequency fan to the actual expected target rotating speed.

[0139] Optionally, the preset correction rule includes a first correction rule, and the correction coefficient determining module 21 is specifically configured to:

[0140] determine a current running stage of the compressor; in the case that the current running stage is an initial starting stage, determine the rotating speed correction coefficient based on the real-time working frequency of the compressor and the first correction rule.

[0141] Optionally, the preset correction rule further includes a second correction rule and a third correction rule, and the determining module is further configured to:

[0142] ​After determining the current operation stage of the compressor, in the case that the current operation stage is the stable operation stage, it is determined whether the real-time exhaust temperature of the compressor meets a predetermined temperature condition; in the case that the real-time exhaust temperature of the compressor meets the temperature condition, the speed correction coefficient is determined based on the real-time water inlet temperature of the heat exchanger and a second correction rule; in the case that the real-time exhaust temperature of the compressor does not meet the temperature condition, the speed correction coefficient is determined based on the real-time water inlet temperature of the heat exchanger, the real-time exhaust temperature of the compressor and a third correction rule.

[0143] Optionally, the first correction rule comprises: determining the speed correction coefficient based on the target working frequency of the compressor, the real-time working frequency of the compressor and a predetermined frequency compensation coefficient.

[0144] And / or, the second correction rule comprises: determining a first target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger from each first candidate temperature interval, and determining the correction coefficient corresponding to the first target temperature interval as the speed correction coefficient.

[0145] And / or, the third correction rule comprises: determining a second target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger from each second candidate temperature interval, and determining a third target temperature interval corresponding to the real-time exhaust temperature of the compressor from each third candidate temperature interval, and determining the correction coefficient corresponding to the second target temperature interval and the third target temperature interval as the speed correction coefficient.

[0146] Optionally, the mode determination module 11 is specifically configured to:

[0147] determine whether the real-time environment temperature meets a linear temperature control condition corresponding to the current working mode; wherein the linear temperature control condition is that the real-time environment temperature is greater than or equal to a minimum environment temperature corresponding to the current working mode and less than or equal to a maximum environment temperature corresponding to the current working mode; and the current working mode comprises a heating mode or a cooling mode.

[0148] If the real-time environment temperature meets the linear temperature control condition, it is determined that the variable frequency fan is in the wind speed correction mode.

[0149] Optionally, the correction coefficient determination module 21 is specifically further configured to: determine the initial expected target speed based on the real-time environment temperature, the minimum environment temperature, the maximum environment temperature, the minimum fan speed corresponding to the current working mode and the maximum fan speed corresponding to the current working mode.

[0150] Optionally, in the case that the current working mode is the heating mode, the device further comprises a control adjustment module, and the control adjustment module is further configured to: after determining whether the real-time environment temperature satisfies the linear temperature control condition corresponding to the current working mode, if the real-time environment temperature does not satisfy the linear temperature control condition, determining whether the real-time environment temperature is less than the minimum environment temperature; and if the real-time environment temperature is less than the minimum environment temperature, adjusting the current rotating speed of the variable frequency fan based on the maximum fan rotating speed.

[0151] Optionally, in the case that the current working mode is the cooling mode, the device further comprises a control adjustment module, and the control adjustment module is further configured to: if the real-time environment temperature does not satisfy the linear temperature control condition, determining whether the real-time environment temperature is greater than the maximum environment temperature; and if the real-time environment temperature is greater than the maximum environment temperature, adjusting the current rotating speed of the variable frequency fan based on the maximum fan rotating speed.

[0152] Optionally, in the case that the current working mode is the heating mode, the control adjustment module is further configured to: after determining whether the real-time environment temperature is less than the minimum environment temperature, if the real-time environment temperature is greater than the minimum environment temperature, determining whether the real-time environment temperature is greater than a first temperature; if the real-time environment temperature is less than or equal to the first temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; and if the real-time environment temperature is greater than the first temperature, controlling the variable frequency fan to stop running; and the first temperature is determined according to the maximum environment temperature and a first preset temperature.

[0153] Optionally, in the case that the current working mode is the cooling mode, the control adjustment module is further configured to: after determining whether the real-time environment temperature is greater than the maximum environment temperature, if the real-time environment temperature is less than the maximum environment temperature, determining whether the real-time environment temperature is less than a second temperature; if the real-time environment temperature is greater than or equal to the second temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; and if the real-time environment temperature is less than the second temperature, controlling the variable frequency fan to stop running; and the second temperature is determined according to the minimum environment temperature and a second preset temperature.

[0154] Optionally, in the case that the current working mode is the heating mode, the control adjustment module is further configured to: after controlling the variable frequency fan to stop running, in the case that the real-time environment temperature is monitored to be less than or equal to a third temperature, controlling the variable frequency fan to restart running; and the third temperature is determined according to the first temperature and a third preset temperature.

[0155] Optionally, in the case that the current working mode is the cooling mode, the control adjustment module is further configured to: after controlling the variable frequency fan to stop running, in the case that the real-time environment temperature is monitored to be greater than or equal to a fourth temperature, controlling the variable frequency fan to restart running; and the fourth temperature is determined according to the second temperature and a fourth preset temperature.

[0156] It should be noted that the fan speed adjusting device provided by the embodiments of the present application and the fan speed adjusting method proposed in the foregoing embodiments belong to the same concept, and the technical details not described in detail in the embodiments can be seen from the foregoing embodiments, and the beneficial effects possessed by the foregoing embodiments are also applicable in the embodiments.

[0157] The above merely provides specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any change or replacement within the technical scope disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of regulating the rotational speed of a fan, characterized by, The method is applied to a heat pump system, and comprises the following steps: determining whether a variable frequency fan is in a wind speed correction mode based on a real-time ambient temperature; in a case where the variable frequency fan is in the wind speed correction mode, obtaining an initial expected target rotating speed of the variable frequency fan, and determining a rotating speed correction coefficient based on a rotating speed correction parameter and a preset correction rule; the rotating speed correction parameter comprises at least one of a real-time working frequency of a compressor, a real-time water inlet temperature of a heat exchanger, and a real-time exhaust temperature of the compressor; the heat exchanger is used for heat exchange with water; correcting the initial expected target rotating speed based on the rotating speed correction coefficient to obtain an actual expected target rotating speed, and adjusting a current rotating speed of the variable frequency fan to the actual expected target rotating speed; the preset correction rule comprises a first correction rule, and the determining of the rotating speed correction coefficient based on the rotating speed correction parameter and the preset correction rule comprises the following steps: determining a current operating stage of the compressor; in a case where the current operating stage is an initial starting stage, determining the rotating speed correction coefficient based on the real-time working frequency of the compressor and the first correction rule; the preset correction rule further comprises a second correction rule and a third correction rule, and after the determining of the current operating stage of the compressor, the method further comprises the following steps: in a case where the current operating stage is a stable running stage, determining whether the real-time exhaust temperature of the compressor meets a predetermined temperature condition; in a case where the real-time exhaust temperature of the compressor meets the temperature condition, determining the rotating speed correction coefficient based on the real-time water inlet temperature of the heat exchanger and the second correction rule; in a case where the real-time exhaust temperature of the compressor does not meet the temperature condition, determining the rotating speed correction coefficient based on the real-time water inlet temperature of the heat exchanger, the real-time exhaust temperature of the compressor and the third correction rule; the first correction rule comprises: determining the rotating speed correction coefficient based on a target working frequency of the compressor, the real-time working frequency of the compressor and a predetermined frequency compensation coefficient; and / or, the second correction rule comprises: determining a first target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger from each first candidate temperature interval, and determining a correction coefficient corresponding to the first target temperature interval as the rotating speed correction coefficient; and / or, the third correction rule comprises: determining a second target temperature interval corresponding to the real-time water inlet temperature of the heat exchanger from each second candidate temperature interval, and determining a third target temperature interval corresponding to the real-time exhaust temperature of the compressor from each third candidate temperature interval, and determining a correction coefficient corresponding to the second target temperature interval and the third target temperature interval as the rotating speed correction coefficient.

2. The method of claim 1, wherein the determining of whether the variable frequency fan is in the wind speed correction mode based on the real-time ambient temperature comprises the following steps: determining whether the real-time ambient temperature meets a linear temperature control condition corresponding to the current working mode, wherein the linear temperature control condition is that the real-time ambient temperature is greater than or equal to a minimum ambient temperature corresponding to the current working mode and less than or equal to a maximum ambient temperature corresponding to the current working mode; the current working mode includes a heating mode or a cooling mode; if the real-time ambient temperature meets the linear temperature control condition, determining that the variable frequency fan is in the wind speed correction mode.

3. The method of claim 2, wherein The obtaining of the initial expected target rotating speed of the variable frequency fan comprises: determining the initial expected target rotating speed based on the real-time ambient temperature, the minimum ambient temperature, the maximum ambient temperature, a minimum fan rotating speed corresponding to the current working mode, and a maximum fan rotating speed corresponding to the current working mode.

4. The method of claim 3, wherein In the case where the current working mode is the heating mode, after the determination of whether the real-time ambient temperature meets the linear temperature control condition corresponding to the current working mode, the method further comprises: if the real-time ambient temperature does not meet the linear temperature control condition, determining whether the real-time ambient temperature is less than the minimum ambient temperature; if the real-time ambient temperature is less than the minimum ambient temperature, adjusting the current rotating speed of the variable frequency fan based on the maximum fan rotating speed; and / or, in the case where the current working mode is the cooling mode, after the determination of whether the real-time ambient temperature meets the linear temperature control condition corresponding to the current working mode, the method further comprises: if the real-time ambient temperature does not meet the linear temperature control condition, determining whether the real-time ambient temperature is greater than the maximum ambient temperature; if the real-time ambient temperature is greater than the maximum ambient temperature, adjusting the current rotating speed of the variable frequency fan based on the maximum fan rotating speed.

5. The method of claim 4, wherein In the case where the current working mode is the heating mode, after the determination of whether the real-time ambient temperature is less than the minimum ambient temperature, the method further comprises: if the real-time ambient temperature is greater than the minimum ambient temperature, determining whether the real-time ambient temperature is greater than a first temperature; if the real-time ambient temperature is less than or equal to the first temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; if the real-time ambient temperature is greater than the first temperature, controlling the variable frequency fan to stop running; the first temperature is determined according to the maximum ambient temperature and a first preset temperature; and / or, in the case where the current working mode is the cooling mode, after the determination of whether the real-time ambient temperature is greater than the maximum ambient temperature, the method further comprises: if the real-time ambient temperature is less than the maximum ambient temperature, determining whether the real-time ambient temperature is less than a second temperature; if the real-time ambient temperature is greater than or equal to the second temperature, adjusting the current rotating speed of the variable frequency fan based on the minimum fan rotating speed; if the real-time ambient temperature is less than the second temperature, controlling the variable frequency fan to stop running; the second temperature is determined according to the minimum ambient temperature and a second preset temperature.

6. The method of claim 5, wherein In a case where the current working mode is the heating mode, after the control of stopping the operation of the variable frequency fan, the method further comprises: in a case where it is monitored that the real-time environment temperature is less than or equal to a third temperature, controlling the variable frequency fan to restart operation; wherein the third temperature is determined according to the first temperature and a third preset temperature. And / or, in a case where the current working mode is the cooling mode, after the control of stopping the operation of the variable frequency fan, the method further comprises: in a case where it is monitored that the real-time environment temperature is greater than or equal to a fourth temperature, controlling the variable frequency fan to restart operation; wherein the fourth temperature is determined according to the second temperature and a fourth preset temperature.

7. A device for regulating the rotational speed of a fan, which is controlled by the method for regulating the rotational speed of a fan according to any one of claims 1 to 6, characterized in that, The device is configured in a heat pump system, and the device comprises: A mode determination module is configured to determine whether the variable frequency fan is in a wind speed correction mode based on a real-time environment temperature. A correction coefficient determination module is configured to, in a case where the variable frequency fan is in the wind speed correction mode, acquire an initial expected target rotating speed of the variable frequency fan, and determine a rotating speed correction coefficient based on a rotating speed correction parameter and a preset correction rule; the rotating speed correction parameter comprises at least one of a real-time working frequency of a compressor, a real-time water inlet temperature of a heat exchanger, and a real-time exhaust temperature of the compressor; the heat exchanger is configured to exchange heat with water; A correction adjustment module is configured to correct the initial expected target rotating speed based on the rotating speed correction coefficient to obtain an actual expected target rotating speed, and adjust a current rotating speed of the variable frequency fan to the actual expected target rotating speed.

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