Dynamic frequency control method and device, compressor and storage medium

Abstract

The invention provides a frequency dynamic control method and device, a compressor and a storage medium, and relates to the technical field of heat pumps. According to the scheme, corresponding environment temperature intervals are set corresponding to environment temperatures, and the maximum operation frequency of the compressor in each environment temperature interval is set in combination with the environment temperatures and the water return temperature; therefore, the compressor can dynamically adjust the operation frequency according to changes of the environment temperature and the return water temperature, safety and efficiency of the system are guaranteed, the situation that the compressor excessively operates under specific conditions or cannot reach the optimal state is avoided, and reduction of the temperature adjusting capacity of the compressor can be effectively reduced.

Description

Technical Field

[0001] This application relates to the technical field of heat pumps, and particularly to a method and device for dynamic frequency control, a compressor, and a storage medium. Background Art

[0002] A heat pump system is a device that uses high-level energy to make heat flow from a low-temperature heat source (such as air) to a high-temperature heat source. For example, a heat pump system includes equipment such as a compressor and a heat exchanger. The traditional control logic of a heat pump system mainly limits the maximum frequency of the compressor based on a single parameter. That is, in the traditional control scheme, the adjustment of the maximum frequency of the compressor does not comprehensively consider external environmental factors, such as ambient temperature and return water temperature.

[0003] Therefore, the traditional scheme may cause the compressor to operate excessively or fail to reach the optimal state under specific conditions, which not only affects the operation of the heat pump system but also increases the instability of the heat pump system and the risk of compressor damage. For example, under the conditions of low ambient temperature and low return water temperature, the evaporator (i.e., a type of heat exchanger) may frost, resulting in a gradual decrease in the low-pressure pressure of the system and even a decrease in the heating capacity of the system. Summary of the Invention

[0004] This application provides a method and device for dynamic frequency control, a compressor, and a storage medium. This solution can combine the ambient temperature and the return water temperature to dynamically adjust the operating frequency of the compressor to ensure the safety and efficiency of the system.

[0005] In a first aspect, this application provides a method for dynamic frequency control, which is applied to a compressor in a heat pump system. The compressor is provided with multiple ambient temperature ranges corresponding to the ambient temperature, and the same ambient temperature range has corresponding maximum and minimum values for different temperature adjustment modes. The method includes:

[0006] Obtain the current ambient temperature, return water temperature, and the selected temperature adjustment mode;

[0007] When the temperature adjustment mode is determined, determine the target ambient temperature range corresponding to the current ambient temperature according to the obtained ambient temperature, the maximum and minimum values of each ambient temperature range;

[0008] If the target ambient temperature range is the first ambient temperature range, use the fixed frequency corresponding to the temperature adjustment mode as the maximum operating frequency of the compressor;

[0009] If the target ambient temperature range is the second ambient temperature range, determine the maximum operating frequency of the compressor according to the ambient temperature and the return water temperature;

[0010] If the target ambient temperature range is the third ambient temperature range, determine the maximum operating frequency of the compressor according to the return water temperature.

[0011] In a second aspect, the present application further provides a frequency dynamic control device, which is applied to a compressor in a heat pump system. The compressor is provided with a plurality of ambient temperature ranges corresponding to the ambient temperature, and the same ambient temperature range corresponds to different temperature adjustment modes with corresponding maximum and minimum values. The device includes:

[0012] An information acquisition module configured to acquire the current ambient temperature, return water temperature, and the selected temperature adjustment mode;

[0013] An interval determination module configured to, when the temperature adjustment mode is determined, determine the target ambient temperature range corresponding to the current ambient temperature according to the acquired ambient temperature, the maximum and minimum values of each ambient temperature range;

[0014] A first frequency configuration module configured to, if the target ambient temperature range is the first ambient temperature range, use the fixed frequency corresponding to the temperature adjustment mode as the maximum operating frequency of the compressor;

[0015] A second frequency configuration module configured to, if the target ambient temperature range is the second ambient temperature range, determine the maximum operating frequency of the compressor according to the ambient temperature and the return water temperature;

[0016] A third frequency configuration module configured to, if the target ambient temperature range is the third ambient temperature range, determine the maximum operating frequency of the compressor according to the return water temperature.

[0017] In a third aspect, the present application further provides a compressor, which includes:

[0018] One or more processors;

[0019] A storage device for storing one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the frequency dynamic control method as described above.

[0020] In a fourth aspect, the present application further provides a storage medium storing computer-executable instructions, which are used to execute the frequency dynamic control method as described above when executed by a processor.

[0021] The solution of the present application sets corresponding ambient temperature ranges according to the ambient temperature, and combines the ambient temperature and the return water temperature to set the maximum operating frequency of the compressor within each ambient temperature range, so that the compressor can dynamically adjust the operating frequency according to the changes in the ambient temperature and the return water temperature, thereby ensuring the safety and efficiency of the system, avoiding the situation that the compressor over-runs or fails to reach the optimal state under specific conditions, and effectively reducing the decline of the temperature adjustment ability of the compressor. Description of the Drawings

[0022] Figure 1 Schematic diagram of the steps of the frequency dynamic control method provided by an embodiment of the present application;

[0023] Figure 2 Schematic diagram of the steps of determining the compressor frequency provided by an embodiment of the present application;

[0024] Figure 3 Schematic diagram of adjusting the maximum operating frequency of the compressor in the heating mode provided by an embodiment of the present application;

[0025] Figure 4 Schematic diagram of adjusting the maximum operating frequency of the compressor in the cooling mode provided by an embodiment of the present application;

[0026] Figure 5 Schematic diagram of the structure of the frequency dynamic control device provided by an embodiment of the present application;

[0027] Figure 6 Schematic diagram of the structure of the compressor provided by an embodiment of the present application. Detailed implementation manners

[0028] The following further elaborates on the embodiments of the present application in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the embodiments of the present application, rather than limiting the embodiments of the present application. Additionally, it should be noted that for the sake of description, only parts related to the embodiments of the present application are shown in the accompanying drawings rather than all the structures. Those skilled in the art should be able to think that as long as the technical features do not conflict with each other, any combination of technical features can constitute an alternative implementation manner.

[0029] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after. In the description of the present application, "multiple" means two or more, and "several" means one or more.

[0030] A heat pump system is a device that uses high-level energy to make heat flow from a low-temperature heat source (air) to a high-temperature heat source. In a heat pump system, there are components such as a compressor, an outdoor heat exchanger, an indoor heat exchanger, an electronic expansion valve, and a four-way reversing valve. When the heat pump system is heating in winter, the four-way reversing valve controls the refrigerant to flow out from the exhaust port of the compressor and sequentially pass through the indoor heat exchanger, the electronic expansion valve, and the outdoor heat exchanger, and finally return to the suction port of the compressor. At this time, the outdoor heat exchanger acts as an evaporator to absorb the heat from the outdoor environment, and the indoor heat exchanger acts as a condenser to release heat to the indoor environment. During the heating process of the heat pump system, the water vapor in the outdoor environment will frost when it encounters the relatively low-temperature outer surface of the outdoor heat exchanger. When the frost layer on the outer surface of the outdoor heat exchanger accumulates to a certain thickness, it will affect the heating effect of the heat pump system.

[0031] In a heat pump system, in the traditional solution, the operating frequency of the compressor is limited based on a single parameter. However, under specific conditions, it is difficult for the above solution to make the compressor reach the optimal operating state or may cause the compressor to operate excessively. For example, in the case of low ambient temperature and low return water temperature, the evaporator, which is the outdoor heat exchanger, may frost. When the evaporator frosts, the low-pressure pressure of the system gradually decreases, the heating capacity of the heat pump system decreases, and the heating effect of the heat pump system is poor. And it is easy to occur that the compressor operates excessively to ensure the heating effect.

[0032] In response to this, the present application provides a frequency dynamic control method. This method can be applied to the compressor of a heat pump system. Moreover, the compressor is provided with five ambient temperature intervals corresponding to the ambient temperature. For example, corresponding to the ambient temperature, the compressor is provided with a first ambient temperature interval, a second ambient temperature interval, and a third ambient temperature interval. And the same ambient temperature interval corresponds to different temperature adjustment modes with corresponding maximum and minimum values. The temperature adjustment modes include a heating mode and a cooling mode, that is, the same ambient temperature interval can be set with the same maximum and minimum values or different maximum and minimum values in the heating mode and the cooling mode. Figure 1 The following is a schematic diagram of the steps of the frequency dynamic control method provided by an embodiment of the present application. The specific steps are as follows:

[0033] Step S110: Obtain the current ambient temperature, return water temperature, and the selected temperature adjustment mode.

[0034] It is understandable that multiple temperature sensors are provided in the heat pump system, such as a temperature sensor for detecting the ambient temperature, a temperature sensor for detecting the return water temperature, etc. Thus, based on the processor, the data detected by the above temperature sensors is collected and analyzed, and then the current ambient temperature and return water temperature are determined. Of course, it can be imagined that the temperature adjustment mode includes a heating mode and a cooling mode, and the specific mode selection is determined according to the user's selection or system setting. The processor can obtain the specific mode determined by the user's selection or system setting.

[0035] Step S120: When the temperature adjustment mode is determined, based on the obtained ambient temperature, the maximum and minimum values of each ambient temperature range, determine the target ambient temperature range corresponding to the current ambient temperature.

[0036] For the heating mode and the cooling mode, the compressor can set different range sizes according to the corresponding control requirements, so that the same ambient temperature range has different maximum and minimum values under different temperature adjustment modes. Therefore, after the temperature adjustment mode is determined, correspondingly, the size of each ambient temperature range can also be determined. The compressor can determine the target ambient temperature range where the currently obtained ambient temperature is located according to the comparison result of the current ambient temperature with the maximum and minimum values of each ambient temperature range.

[0037] Step S130: If the target ambient temperature range is the first ambient temperature range, use the fixed frequency corresponding to the temperature adjustment mode as the maximum operating frequency of the compressor.

[0038] Step S140: If the target ambient temperature range is the second ambient temperature range, determine the maximum operating frequency of the compressor according to the ambient temperature and the return water temperature.

[0039] Step S150: If the target ambient temperature range is the third ambient temperature range, determine the maximum operating frequency of the compressor according to the return water temperature.

[0040] It is understandable that the compressor has different control schemes for the operating frequencies of the compressor in different ambient temperature ranges. For the case where the target ambient temperature range is the first ambient temperature range, the compressor operates at a fixed frequency and uses this fixed frequency as the maximum operating frequency. It should be noted that within the first ambient temperature range, the fixed frequency selected by the compressor is related to the temperature adjustment mode.

[0041] For the case where the target ambient temperature range is the second ambient temperature range, the compressor needs to determine its maximum operating frequency at this ambient temperature according to the ambient temperature and the return water temperature. That is, within the second ambient temperature range, the maximum operating frequency of the compressor is related to the ambient temperature and the return water temperature.

[0042] For the case where the target ambient temperature range is the third ambient temperature range, the compressor needs to determine the maximum operating frequency of the compressor according to the return water temperature. For example, different return water temperatures correspond to different preset compressor frequencies, and in the third ambient temperature range, the preset compressor frequency corresponding to the current return water temperature is used as the maximum operating frequency of the current compressor.

[0043] Of course, it can be conceived that in the same temperature adjustment mode, as the ambient temperature changes, the compressor also adjusts the maximum operating frequency of the compressor according to the change of the return water temperature, so that the compressor frequency can change dynamically, thereby meeting the corresponding control requirements.

[0044] From the above solution, it can be seen that the solution of the present application can combine the ambient temperature and the return water temperature to dynamically adjust the operating frequency of the compressor, so that the compressor can dynamically adjust the operating frequency in the case of changes in the ambient temperature and the return water temperature, to ensure the safety and efficiency of the system, and can perform temperature adjustment more efficiently, can meet the user's usage requirements, and can also make the equipment operate more stably and last longer.

[0045] In one embodiment, the compressor is provided with different preset compressor frequencies corresponding to different return water temperatures in the second ambient temperature range and the third ambient temperature range, and when the return water temperature is fixed, the maximum operating frequency of the compressor has a linear relationship with the ambient temperature. Figure 2 The following is a schematic diagram of the steps for determining the compressor frequency provided by an embodiment of the present application, and the specific steps are as follows:

[0046] Step S210: Select the preset compressor frequency corresponding to the return water temperature, and use the preset compressor frequency as the frequency value selected by the target endpoint of the second ambient temperature range.

[0047] Step S220: According to the preset compressor frequency and the fixed frequency corresponding to the temperature adjustment mode in the first ambient temperature range, determine the coefficient of the linear relationship between the ambient temperature and the maximum operating frequency at the current return water temperature, so as to determine the operating frequencies corresponding to the ambient temperatures in the second ambient temperature range.

[0048] Step S230: Based on the ambient temperature, select the operating frequency corresponding to the ambient temperature as the maximum operating frequency of the compressor.

[0049] It can be understood that in some embodiments, as the ambient temperature changes, the adjustment of the compressor frequency is a dynamic and continuous process, and the compressor frequencies corresponding to the common endpoints of two adjacent ambient temperature ranges are the same. Therefore, when the second ambient temperature range is an adjacent range of the first ambient temperature range, the maximum operating frequency of the compressor corresponding to one endpoint of the second ambient temperature range is equal to the fixed frequency set in the first ambient temperature range.

[0050] Moreover, within the second ambient temperature range, the compressor determines the frequency value corresponding to the target endpoint of the second ambient temperature range according to the preset compressor frequencies corresponding to the respective return water temperatures. For example, taking the case where the value range of the second ambient temperature range is greater than that of the first ambient temperature range as an example, the frequency corresponding to one endpoint of the second ambient temperature range (i.e., the endpoint with the smallest value) is the fixed frequency set for the first ambient temperature range, while the frequency corresponding to the target endpoint of the second ambient temperature range (i.e., the endpoint with the largest value) is the preset compressor frequency corresponding to the current return water temperature.

[0051] When the frequency values corresponding to the two endpoints of the second ambient temperature range are determined, correspondingly, the coefficients of the linear relationship within the second ambient temperature range and the third ambient temperature range can be determined. Furthermore, in combination with the maximum operating frequencies of the compressor corresponding to the interval endpoints, the operating frequencies corresponding to the respective ambient temperatures within the second ambient temperature range or the third ambient temperature range can also be determined. Therefore, the compressor can determine the operating frequency corresponding to the current ambient temperature according to the linear relationship, and thus use this operating frequency as the maximum operating frequency of the compressor.

[0052] For example, taking x 1 and x 2 to represent the ambient temperature values of the two endpoints of the second ambient temperature range, and taking y 1 and y 2 to represent the frequency values corresponding to the two endpoints respectively, where y 1 corresponds to the value of the fixed frequency, and y 2 corresponds to the preset compressor frequency corresponding to the current return water temperature. Therefore, when the values of the two endpoints of the second ambient temperature range are both determined, the maximum operating frequency y of the compressor corresponding to the ambient temperature x can be determined according to the following formula:

[0053]

[0054] It should be noted that different return water temperatures correspond to different preset compressor frequencies, and correspondingly, different return water temperatures correspond to different linear relationships. In some embodiments, when the return water temperature changes, the compressor needs to re-determine the corresponding linear relationship according to the preset compressor frequency corresponding to the changed return water temperature. That is, within the second ambient temperature range or the third ambient temperature range, the compressor determines the linear relationships corresponding to the respective return water temperatures. When the return water temperature changes, the compressor needs to re-determine the selected linear relationship according to the current return water temperature, and then determine the current maximum operating frequency of the compressor according to the current ambient temperature in the re-determined linear relationship.

[0055] Therefore, for the control of the maximum operating frequency of the compressor, the compressor can determine the linear relationship between the maximum operating frequency of the compressor and the ambient temperature within the interval according to the ambient temperature, the return water temperature, and the corresponding frequency values, so as to dynamically control the maximum operating frequency of the compressor, enabling the compressor to adapt to the changes in the ambient temperature and the return water temperature, and then dynamically adjusting the operating frequency, so that the compressor can operate more efficiently, meet the safety and efficiency requirements of the system, avoid the situation that the compressor over-operates or fails to reach the optimal state under specific conditions, and effectively reduce the decline of the temperature regulation ability of the compressor.

[0056] In some embodiments, the second ambient temperature interval includes a first sub-interval and a second sub-interval, and the two sub-intervals are respectively different ambient temperature intervals. For example, all the values within the first sub-interval are greater than the first ambient temperature interval, and all the values within the second sub-interval are less than the first ambient temperature interval. Correspondingly, within the first sub-interval and the second sub-interval, the linear relationship between the ambient temperature and the maximum operating frequency determined according to the solution provided in the above embodiments can be considered. It should be noted that the coefficients in the linear relationships between the ambient temperature and the maximum operating frequency determined within the first sub-interval and the second sub-interval can be different.

[0057] In one embodiment, the compressor is provided with a temperature control range corresponding to the return water temperature, and within the temperature control range, each return water temperature corresponds to a different preset compressor frequency. Within the third ambient temperature interval, the compressor determines the maximum operating frequency according to the return water temperature. Specifically, if the current return water temperature is within the temperature control range, the compressor selects the preset compressor frequency corresponding to the return water temperature as the maximum operating frequency of the compressor. If the current return water temperature is outside the temperature control range and when the return water temperature is greater than all the temperature values within the temperature control range, the compressor uses the preset compressor frequency corresponding to the maximum value within the temperature control range (i.e., the return water temperature with the largest value) as the maximum operating frequency of the compressor.

[0058] It should be noted that in another embodiment, if the current return water temperature is outside the temperature control range and when the return water temperature is less than all the temperature values within the temperature control range, the compressor uses the preset compressor frequency corresponding to the minimum value within the temperature control range (i.e., the return water temperature with the smallest value) as the maximum operating frequency of the compressor.

[0059] In some embodiments, when the third ambient temperature range is a high temperature range, the preset compressor frequencies corresponding to the return water temperatures within the temperature control range set within the third ambient temperature range are all less than the fixed frequency corresponding to the current temperature adjustment mode. That is, in the case of the same temperature adjustment mode, when the ambient temperature is within the third ambient temperature range, that is, when the ambient temperature is high, correspondingly, the operating frequency selected by the compressor is less than the fixed frequency selected when the ambient temperature is within the first ambient temperature range in this temperature adjustment mode, so as to prevent the compressor operating frequency from being too high and affecting the operation of the equipment in high temperature conditions.

[0060] In the case of a high ambient temperature, the higher the operating frequency of the compressor, the higher the temperature inside the compressor, and the components on the drive board inside the compressor are likely to be damaged due to high temperature. In this regard, in some embodiments, the compressor is preset with a frequency upper limit value corresponding to the temperature tolerance characteristics of the components. The temperature tolerance characteristics of the components are used as parameters of the components, which are used to inform the user of the temperature range in which the components work. The above frequency upper limit value corresponds to the frequency when the temperature reaches the maximum value within the temperature range. Therefore, in the case where the target ambient temperature range is the third ambient temperature range, the compressor determines the value of the maximum operating frequency of the compressor determined according to the return water temperature based on the frequency upper limit value.

[0061] For example, in one embodiment, after determining the maximum operating frequency of the compressor according to the return water temperature, compare the maximum operating frequency with the frequency upper limit value to determine whether the maximum operating frequency exceeds the frequency upper limit value, that is, determine whether the maximum operating frequency is greater than the frequency upper limit value.

[0062] When the maximum operating frequency exceeds the frequency upper limit value, the compressor uses the frequency upper limit value as the value of the maximum operating frequency of the compressor; when the maximum operating frequency does not exceed the frequency upper limit value, the compressor uses the value of the maximum operating frequency of the compressor determined according to the return water temperature.

[0063] It should be noted that in some embodiments, the compressor can also directly select the frequency upper limit value as the maximum operating frequency of the compressor.

[0064] In some embodiments, the third ambient temperature range includes a third sub-range and a fourth sub-range. Different temperature control ranges can be set corresponding to the third sub-range and the fourth sub-range, and the preset compressor frequencies corresponding to the return water temperatures within each temperature control range can also be set to different frequency values.

[0065] In one embodiment, the second ambient temperature range includes a first sub-range and a second sub-range, and the third ambient temperature range includes a third sub-range and a fourth sub-range. Arranged in ascending order, that is, the order in which the ambient temperature gradually increases, the above ambient temperature ranges are the fourth sub-range, the second sub-range, the first ambient temperature range, the first sub-range, and the third sub-range in sequence.

[0066] It can be conceived that within the first sub-interval and the second sub-interval, the linear relationship between the ambient temperature and the maximum operating frequency at the corresponding return water temperature is different. Exemplarily, the dynamic control of the maximum operating frequency of the compressor is described in the heating mode. Of course, for the cooling mode, the dynamic control of the maximum operating frequency of the compressor can also be carried out in the same way. Figure 3 The figure is a schematic diagram of the adjustment of the maximum operating frequency of the compressor in the heating mode provided by an embodiment of the present application. In the figure, the horizontal axis represents the ambient temperature, and the vertical axis represents the maximum operating frequency of the compressor in the heating mode.

[0067] As shown in the figure, H47 is the highest return water temperature within the temperature control range in the heating mode, and H46 is the lowest return water temperature within the temperature control range in the heating mode; H25 is the target frequency at low temperature in the heating mode, and H50 is another target frequency at low temperature in the heating mode; H28 is the target frequency at high ambient temperature in the heating mode, and H51 is another target frequency at high temperature in the heating mode. That is, the above-mentioned target frequencies H25, H28, H50, and H51 are all preset compressor frequencies.

[0068] Moreover, H24, H23, H26, and H27 represent the temperature values corresponding to the endpoint values of the interval. It can be conceived that H23 - H26 corresponds to the first ambient temperature interval, H26 - H27 corresponds to the first sub-interval in the second ambient temperature interval, H24 - H23 corresponds to the second sub-interval in the second ambient temperature interval, the range greater than H27 corresponds to the third sub-interval in the third ambient temperature interval, and the range less than H24 corresponds to the fourth sub-interval in the third ambient temperature interval.

[0069] Therefore, within the first ambient temperature interval, the compressor uses the fixed frequency H08 as the maximum operating frequency of the compressor. In the third and fourth sub-intervals, the compressor uses the operating frequency corresponding to the current return water temperature as the maximum operating frequency of the compressor. For example, within the third sub-interval, the current return water temperature is H47, and correspondingly, the compressor uses the target frequency H28 corresponding to the return water temperature H47 as the maximum operating frequency of the compressor. For example, within the fourth sub-interval, the current return water temperature is H46, and correspondingly, the compressor uses the target frequency H25 corresponding to the return water temperature H46 as the maximum operating frequency of the compressor.

[0070] Within the second ambient temperature range, different preset compressor frequencies are set corresponding to different return water temperatures, such as the target frequencies H25, H28, H50, H51, etc. in the figure. Therefore, when the interval endpoints and the corresponding frequency values are determined, the linear relationship between the ambient temperature and the maximum operating frequency of the compressor within the first sub-interval of the second ambient temperature range can also be determined; similarly, the linear relationship between the ambient temperature and the maximum operating frequency of the compressor within the second sub-interval of the second ambient temperature range can also be determined.

[0071] It can be seen from this that in some embodiments, in the heating mode, the compressor can operate according to Figure 3 the relationship between the ambient temperature and the maximum operating frequency of the compressor as shown, in combination with the ambient temperature and the return water temperature, so as to dynamically control the operating frequency of the compressor in each ambient temperature range, enabling the compressor to operate efficiently.

[0072] Figure 4 FIG. is a schematic diagram of adjusting the maximum operating frequency of the compressor in the refrigeration mode provided by an embodiment of the present application. In the figure, the horizontal axis represents the ambient temperature, and the vertical axis represents the maximum operating frequency of the compressor in the refrigeration mode.

[0073] As shown in the figure, H45 is the highest return water temperature within the temperature control range in the refrigeration mode, and H44 is the lowest return water temperature within the temperature control range in the refrigeration mode; H19 is the target frequency at low temperature in the refrigeration mode, and H48 is another target frequency at low temperature in the refrigeration mode; H22 is the target frequency at high temperature in the refrigeration mode, and H49 is another target frequency at high temperature in the refrigeration mode. That is, the above-mentioned target frequencies H19, H22, H48, and H49 are all preset compressor frequencies.

[0074] Moreover, H18, H17, H20, and H21 represent the temperature values corresponding to the endpoint values of the intervals. It can be imagined that H17 - H20 correspond to the first ambient temperature range, H20 - H21 correspond to the first sub-interval of the second ambient temperature range, H18 - H17 correspond to the second sub-interval of the second ambient temperature range, the range greater than H21 corresponds to the third sub-interval of the third ambient temperature range, and the range less than H18 corresponds to the fourth sub-interval of the third ambient temperature range.

[0075] Therefore, within the first ambient temperature range, the compressor uses a fixed frequency H09 as the maximum operating frequency of the compressor. In the third sub-range and the fourth sub-range, the compressor uses the operating frequency corresponding to the current return water temperature as the maximum operating frequency of the compressor. For example, within the third sub-range, the current return water temperature is H44, and correspondingly, the compressor uses the target frequency H49 corresponding to the return water temperature H44 as the maximum operating frequency of the compressor. For example, within the fourth sub-range, the current return water temperature is H45, and correspondingly, the compressor uses the target frequency H48 corresponding to the return water temperature H45 as the maximum operating frequency of the compressor.

[0076] Within the second ambient temperature range, different preset compressor frequencies are set corresponding to different return water temperatures, such as the target frequencies H19, H48, H22, H48, etc. in the figure. Therefore, when the interval endpoints and the corresponding frequency values are determined, the linear relationship between the ambient temperature and the maximum operating frequency of the compressor within the first sub-range of the second ambient temperature range can also be determined; similarly, the linear relationship between the ambient temperature and the maximum operating frequency of the compressor within the second sub-range of the second ambient temperature range can also be determined.

[0077] Figure 5 The figure is a schematic structural diagram of a frequency dynamic control device provided by an embodiment of the present application. The device is applied to a compressor in a heat pump system. The compressor is provided with multiple ambient temperature ranges corresponding to the ambient temperature, and the same ambient temperature range has corresponding maximum and minimum values for different temperature adjustment modes. The frequency dynamic control device is used to execute the frequency dynamic control method provided by the above embodiment, and has function modules and beneficial effects corresponding to the execution method. As shown in the figure, the device includes an information acquisition module 401, an interval determination module 402, a first frequency configuration module 403, a second frequency configuration module 404, and a third frequency configuration module 405.

[0078] Among them, the information acquisition module 401 is configured to acquire the current ambient temperature, return water temperature, and the selected temperature adjustment mode; the interval determination module 402 is configured to determine the target ambient temperature range corresponding to the current ambient temperature according to the acquired ambient temperature, the maximum and minimum values of each ambient temperature range when the temperature adjustment mode is determined; the first frequency configuration module 403 is configured to use the fixed frequency corresponding to the temperature adjustment mode as the maximum operating frequency of the compressor if the target ambient temperature range is the first ambient temperature range; the second frequency configuration module 404 is configured to determine the maximum operating frequency of the compressor according to the ambient temperature and the return water temperature if the target ambient temperature range is the second ambient temperature range; the third frequency configuration module 405 is configured to determine the maximum operating frequency of the compressor according to the return water temperature if the target ambient temperature range is the third ambient temperature range.

[0079] Based on the above embodiments, within the second ambient temperature range, different return water temperatures correspond to different preset compressor frequencies, and the second frequency configuration module 404 is further configured to:

[0080] Select the preset compressor frequency corresponding to the return water temperature, and use the preset compressor frequency as the frequency value selected for the target endpoint of the second ambient temperature range;

[0081] According to the preset compressor frequency and the fixed frequency corresponding to the temperature adjustment mode in the first ambient temperature range, determine the coefficient of the linear relationship between the ambient temperature and the maximum operating frequency at the current return water temperature, so as to determine the operating frequencies corresponding to each ambient temperature in the second ambient temperature range;

[0082] Based on the ambient temperature, select the operating frequency corresponding to the ambient temperature as the maximum operating frequency of the compressor.

[0083] Based on the above embodiments, the second frequency configuration module 404 is further configured to:

[0084] In the case where the return water temperature changes, according to the preset compressor frequency corresponding to the changed return water temperature, re-determine the linear relationship between the maximum operating frequency of the compressor and the ambient temperature.

[0085] Based on the above embodiments, a temperature control range is set corresponding to the return water temperature, and different preset compressor frequencies correspond to each return water temperature within the temperature control range. The third frequency configuration module 405 is further configured to:

[0086] If the current return water temperature is within the temperature control range, select the preset compressor frequency corresponding to the return water temperature as the maximum operating frequency of the compressor;

[0087] If the current return water temperature is outside the temperature control range, then when the return water temperature is greater than all the temperature values within the temperature control range, use the preset compressor frequency corresponding to the maximum value within the temperature control range as the maximum operating frequency of the compressor;

[0088] Or, if the current return water temperature is within the temperature control range, select the preset compressor frequency corresponding to the return water temperature as the maximum operating frequency of the compressor;

[0089] If the current return water temperature is outside the temperature control range, then when the return water temperature is less than all the temperature values within the temperature control range, use the preset compressor frequency corresponding to the minimum value within the temperature control range as the maximum operating frequency of the compressor.

[0090] Based on the above embodiments, the third frequency configuration module 405 is further configured to:

[0091] In the third ambient temperature range, different temperature control ranges are set corresponding to the return water temperature. And when the third ambient temperature range is a high temperature range, the preset compressor frequencies for each return water temperature within the temperature control range are all less than the fixed frequency corresponding to the current temperature adjustment mode.

[0092] Based on the above embodiments, the compressor is also preset with a frequency upper limit value corresponding to the temperature tolerance characteristics of the components. The device further includes a frequency limiting module, and the frequency limiting module is configured to:

[0093] When the target ambient temperature range is the third ambient temperature range, based on the frequency upper limit value, determine the value of the maximum operating frequency of the compressor determined according to the return water temperature.

[0094] Based on the above embodiments, the frequency limiting module is further configured to:

[0095] Judge whether the maximum operating frequency of the compressor determined according to the return water temperature exceeds the frequency upper limit value;

[0096] If the maximum operating frequency exceeds the frequency upper limit value, then use the frequency upper limit value as the value of the maximum operating frequency of the compressor;

[0097] If the maximum operating frequency does not exceed the frequency upper limit value, then use the value of the maximum operating frequency of the compressor determined according to the return water temperature.

[0098] It should be noted that in the embodiments of the above frequency dynamic control device, each module is only divided according to the functional logic, but is not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of each module are only for the convenience of distinguishing from each other and do not limit the protection scope of the present application.

[0099] Figure 6 This is a schematic structural diagram of a compressor provided by an embodiment of the present application. This device is used to execute the frequency dynamic control method provided by the above embodiments, and has the corresponding functional modules and beneficial effects for executing the method. As shown in the figure, the compressor includes a processor 501, a memory 502, an input device 503, and an output device 504. The number of processors 501 can be one or more. In the figure, one processor 501 is taken as an example; the processor 501, the memory 502, the input device 503, and the output device 504 can be connected through a bus or other means. In the figure, connection through a bus is taken as an example. The memory 502, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the frequency dynamic control method in the embodiments of the present application. The processor 501 executes corresponding various functional applications and data processing by running the software programs, instructions, and modules stored in the memory 502, that is, implements the above frequency dynamic control method.

[0100] The memory 502 may mainly include a program storage area and a data storage area. Among them, the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data recorded or created during use, etc. In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the memory 502 may further include a memory remotely provided with respect to the processor 501, and these remotely provided memories may be connected to the terminal device through a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0101] The input device 503 may be used to input corresponding digital or character information to the processor 501, and generate key signal inputs related to the user settings and function controls of the device; the output device 504 may be used to send or display key signal outputs related to the user settings and function controls of the device.

[0102] The embodiment of the present application also provides a storage medium storing computer-executable instructions, and the computer-executable instructions are used to perform related operations in the frequency dynamic control method provided in any embodiment of the present application when executed by a processor.

[0103] Computer-readable storage media include permanent and non-permanent, removable and non-removable media and may be implemented by any method or technology for information storage. The information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tapes, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to store information accessible by a computing device.

[0104] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising the element.

[0105] Note that the above is only a preferred embodiment of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments only. Without departing from the concept of the present application, more other equivalent embodiments can be included, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A frequency dynamic control method, characterized in that, it is applied to a compressor in a heat pump system. The compressor is provided with a plurality of ambient temperature ranges corresponding to the ambient temperature. Different temperature adjustment modes corresponding to the same ambient temperature range have corresponding maximum and minimum values. The method includes: Obtaining the current ambient temperature, return water temperature, and the selected temperature adjustment mode; When the temperature adjustment mode is determined, determining the target ambient temperature range corresponding to the current ambient temperature according to the obtained ambient temperature, the maximum and minimum values of each ambient temperature range; If the target ambient temperature range is the first ambient temperature range, using the fixed frequency corresponding to the temperature adjustment mode as the maximum operating frequency of the compressor; If the target ambient temperature range is the second ambient temperature range, determining the maximum operating frequency of the compressor according to the ambient temperature and the return water temperature; If the target ambient temperature range is the third ambient temperature range, determining the maximum operating frequency of the compressor according to the return water temperature.

2. The frequency dynamic control method according to claim 1, characterized in that, within the second ambient temperature range, different return water temperatures correspond to different preset compressor frequencies; the step of if the target ambient temperature range is the second ambient temperature range, determining the maximum operating frequency of the compressor according to the ambient temperature and the return water temperature includes: Selecting the preset compressor frequency corresponding to the return water temperature and using the preset compressor frequency as the frequency value selected by the target endpoint of the second ambient temperature range; According to the preset compressor frequency and the fixed frequency corresponding to the temperature adjustment mode in the first ambient temperature range, determining the coefficient of the linear relationship between the ambient temperature and the maximum operating frequency at the current return water temperature to determine the operating frequencies corresponding to each ambient temperature within the second ambient temperature range; Based on the ambient temperature, selecting the operating frequency corresponding to the ambient temperature as the maximum operating frequency of the compressor.

3. The frequency dynamic control method according to claim 2, characterized in that, the method further includes: When the return water temperature changes, re-determining the linear relationship between the maximum operating frequency of the compressor and the ambient temperature according to the preset compressor frequency corresponding to the changed return water temperature.

4. The frequency dynamic control method according to claim 1, characterized in that, a temperature control range is set corresponding to the return water temperature, and different preset compressor frequencies correspond to different return water temperatures within the temperature control range; the step of if the target ambient temperature range is the third ambient temperature range, determining the maximum operating frequency of the compressor according to the return water temperature includes: If the current return water temperature is within the temperature control range, selecting the preset compressor frequency corresponding to the return water temperature as the maximum operating frequency of the compressor; If the current return water temperature is outside the temperature control range, then when the return water temperature is greater than all the temperature values within the temperature control range, the preset compressor frequency corresponding to the maximum value within the temperature control range is used as the maximum operating frequency of the compressor; Or, if the current return water temperature is within the temperature control range, the preset compressor frequency corresponding to the return water temperature is selected as the maximum operating frequency of the compressor; If the current return water temperature is outside the temperature control range, then when the return water temperature is less than all the temperature values within the temperature control range, the preset compressor frequency corresponding to the minimum value within the temperature control range is used as the maximum operating frequency of the compressor.

5. The frequency dynamic control method according to claim 4, characterized in that different temperature control ranges are set corresponding to the return water temperature within the third ambient temperature range, and in the case where the third ambient temperature range is a high temperature range, the preset compressor frequencies of each return water temperature within the temperature control range are all less than the fixed frequency corresponding to the current temperature adjustment mode.

6. The frequency dynamic control method according to claim 1, characterized in that the compressor is also preset with a frequency upper limit value corresponding to the temperature tolerance characteristics of the components, and the method further includes: in the case where the target ambient temperature range is the third ambient temperature range, based on the frequency upper limit value, determining the value of the maximum operating frequency of the compressor determined according to the return water temperature.

7. The frequency dynamic control method according to claim 6, characterized in that the step of, in the case where the target ambient temperature range is the third ambient temperature range, based on the frequency upper limit value, determining the value of the maximum operating frequency of the compressor determined according to the return water temperature includes: judging whether the maximum operating frequency of the compressor determined according to the return water temperature exceeds the frequency upper limit value; if the maximum operating frequency exceeds the frequency upper limit value, then using the frequency upper limit value as the value of the maximum operating frequency of the compressor; if the maximum operating frequency does not exceed the frequency upper limit value, then using the value of the maximum operating frequency of the compressor determined according to the return water temperature.

8. A frequency dynamic control device, characterized in that it is applied to a compressor in a heat pump system, the compressor is provided with a plurality of ambient temperature ranges corresponding to the ambient temperature, and the same ambient temperature range has corresponding maximum and minimum values for different temperature adjustment modes. The device includes: an information acquisition module configured to acquire the current ambient temperature, return water temperature, and the selected temperature adjustment mode; an interval determination module configured to, in the case where the temperature adjustment mode is determined, determine the target ambient temperature range corresponding to the current ambient temperature according to the acquired ambient temperature, the maximum and minimum values of each ambient temperature range; a first frequency configuration module configured to, if the target ambient temperature range is the first ambient temperature range, use the fixed frequency corresponding to the temperature adjustment mode as the maximum operating frequency of the compressor; The second frequency configuration module is configured to determine the maximum operating frequency of the compressor according to the ambient temperature and the return water temperature if the target ambient temperature range is the second ambient temperature range; The third frequency configuration module is configured to determine the maximum operating frequency of the compressor according to the return water temperature if the target ambient temperature range is the third ambient temperature range.

9. A compressor, Characterized in that, Comprising: One or more processors; A storage device for storing one or more programs, which when executed by one or more of the processors cause the one or more processors to implement the frequency dynamic control method according to any one of claims 1-7.

10. A storage medium storing computer-executable instructions, Characterized in that, The computer-executable instructions are used to execute the frequency dynamic control method according to any one of claims 1-7 when executed by a processor.

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