Standby control method and device for air source heat pump air conditioner, air source heat pump air conditioner and computer readable storage medium

Abstract

The invention relates to the technical field of air conditioners, and discloses a standby control method for an air source heat pump air conditioner, which comprises the following steps: acquiring an outlet water temperature change rate under the condition that a heating operation mode responds to a standby instruction; under the condition that the change rate of the outlet water temperature is smaller than a first threshold value, a target regulation object and a corresponding regulation strategy are determined according to the running state of the compressor and the change stage of the outlet water temperature; and the target regulation and control object is controlled to execute the corresponding regulation and control strategy, so that the air source heat pump air conditioner enters a standby state. According to the method, when the change rate of the outlet water temperature is smaller than a first threshold value, a proper regulation and control object and a regulation and control strategy are determined and executed in combination with the running state of a compressor and the change stage of the outlet water temperature. Therefore, the unit is promoted to reach a standby condition; therefore, the air conditioning unit is easy to enter a standby state, and long-time continuous operation is avoided. The invention further discloses a standby control device for the air source heat pump air conditioner, the air source heat pump air conditioner and a computer storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, for example, to a standby control method and device for an air source heat pump air conditioner, an air source heat pump air conditioner, and a computer storage medium. Background Art

[0002] For an air source heat pump air conditioner, the standby control logic during heating is that when the difference between the actual water outlet temperature and the set water outlet temperature is greater than a preset value, the air conditioner enters the standby state. When the air conditioner is operating in the heating mode, users do not want the air conditioner to run for 24 hours. However, when the heat load of the air conditioner is small, or the environment where the air conditioner is located is a long-term low-temperature environment, the indoor temperature rises slowly, and it is difficult for the air conditioner to reach the standby condition. In addition, when the actual water outlet temperature is close to the set water outlet temperature, the compressor frequency is reduced, and the output capacity of the air conditioner is weakened, making it even more difficult to enter the standby condition.

[0003] A related technology discloses a control method for an air conditioner unit, which obtains the water outlet temperature Tewo and the set target temperature Td; calculates the difference △T = Tewo - Td; determines whether △T is within the set difference range; if not, determines whether the water temperature change rate is within the set change rate range; if not, determines whether the compressor start / stop frequency is within the set start / stop frequency range; if not, determines the compressor additional start / reduced stop interval time according to △T, the water temperature change rate, and the compressor start / stop frequency, and controls one of the compressors in the stop / start state to start / stop after the additional start / reduced stop interval time arrives; comprehensively considers the difference △T, the water temperature change rate, and the compressor start / stop frequency, and controls the start and stop of the compressors in the unit, so as to avoid frequent startup of the compressor caused by too fast feedback of the water temperature.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related technologies:

[0005] The related technology is for the refrigeration working condition and is applicable to multi-unit air conditioners. There is no mention in the related technology on how a single-unit air conditioner enters the standby condition under the heating working condition.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preamble to the subsequent detailed description.

[0008] Embodiments of the present disclosure provide a standby control method and device for an air source heat pump air conditioner, an air source heat pump air conditioner, and a computer storage medium, so that the air source heat pump air conditioner can easily enter the standby state under the heating condition.

[0009] In some embodiments, the method includes: under the heating condition, obtaining the change rate of the water outlet temperature; when the change rate of the water outlet temperature is less than a first threshold, determining a target regulation object and a corresponding regulation strategy according to the operating state of the compressor and the change stage of the water outlet temperature; the target regulation objects include the compressor and the water pump; controlling the target regulation object to execute the corresponding regulation strategy so that the air source heat pump air conditioner enters the standby state.

[0010] Optionally, determining the target regulation object according to the operating state of the compressor and the change stage of the water outlet temperature includes: when the operating state of the compressor is in the frequency reduction state or the frequency holding state, if the change stage of the water outlet temperature is the rising stage, determining the target regulation object as the compressor; if the change stage of the water outlet temperature is the falling stage or the frequency holding stage, determining the target regulation objects as the water pump and the compressor; when the operating state of the compressor is in the frequency increase state, determining the target regulation object as the compressor.

[0011] Here, if the change stage of the water outlet temperature is the rising stage, regulating the compressor can increase the change rate of the water outlet temperature, so the target regulation object is the compressor. If the change stage of the water outlet temperature is the falling stage or the holding stage, the compressor cannot meet the indoor demand after reducing the frequency or maintaining the frequency. Therefore, the target regulation objects are the compressor and the water pump. While maintaining the compressor frequency or increasing the compressor frequency, adjusting the water flow rate can increase the change rate of the water outlet temperature, which helps to meet the standby conditions. When the operating state of the compressor is in the frequency increase state, adjusting the compressor frequency can improve the heating capacity relatively faster than adjusting the flow rate. Therefore, the air conditioner unit is also more likely to enter the standby conditions. In addition, adjusting the water volume will cause a large fluctuation in the indoor temperature. Therefore, when the target regulation object can be selected, adjusting the compressor is given priority. This can minimize the fluctuation of the indoor temperature while prompting the air conditioner unit to enter the standby state.

[0012] Optionally, when the target regulation objects are the water pump and the compressor, determining the regulation strategy according to the operating state of the compressor and the change stage of the water outlet temperature includes: determining that the compressor maintains the current operating frequency and determining that the rotational speed of the water pump decreases by a first amplitude; when the latest change rate of the water outlet temperature is less than the first threshold, determining that the rotational speed of the water pump decreases by a second amplitude until the latest change rate of the water outlet temperature is greater than or equal to the first threshold; wherein, the amplitude of the water pump rotational speed adjustment decreases in sequence.

[0013] In this way, the change rate of the outlet water temperature is adjusted by gradually reducing the water flow rate. On the one hand, the gradual adjustment avoids a too large one-time adjustment of the water flow rate, which seriously affects the indoor temperature. On the other hand, the adjustment range of the water flow rate is relatively large in the initial stage, which can avoid adjusting the water flow rate multiple times when the effect of reducing the water flow rate appears.

[0014] Optionally, the target control object is the compressor. According to the operating state of the compressor and the change stage of the outlet water temperature, the control strategy is determined, including: when the operating state of the compressor is in the frequency reduction state or the frequency holding state, it is determined to maintain the current operating frequency of the compressor; and when the latest change rate of the outlet water temperature is less than the first threshold, it is determined that the compressor increases the frequency by the second amplitude until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; when the operating state of the compressor is in the frequency increase state, according to the change stage of the outlet water temperature, the control strategy of the compressor is determined. In this way, a matching control strategy is selected for the change stage of the outlet water temperature. Thus, the air conditioner unit can be more easily brought into the standby condition.

[0015] Optionally, according to the change stage of the outlet water temperature, the control strategy of the compressor is determined, including: when the change stage of the outlet water temperature is the rising stage, it is determined to increase the frequency increase amplitude of the compressor until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; wherein, the adjustment amplitude of the compressor frequency increases in sequence; when the change stage of the outlet water temperature is the falling stage or the holding stage, it is determined to shorten the frequency increase cycle of the compressor until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; wherein, the frequency increase cycle of the compressor shortens in sequence. In this way, the change rate of the outlet water temperature is improved by means of gradual adjustment. While achieving the adjustment target, the large indoor temperature fluctuation caused by overshoot is avoided.

[0016] Optionally, after controlling the target control object to execute the corresponding control strategy, it further includes: when the target control object is the compressor and the operating frequency of the compressor reaches the limit frequency, if the latest change rate of the outlet water temperature is less than the first threshold, control the water pump speed to decrease; when the target control object is the compressor and the water pump, and the water pump speed reaches the limit speed, if the latest change rate of the outlet water temperature is less than the first threshold, control the compressor to increase the frequency and / or shorten the frequency increase cycle. In this way, through the interlock control of the compressor frequency increase and the water flow rate reduction, the adjustment of the change rate of the outlet water temperature is realized, so that the air conditioner unit can enter the standby state.

[0017] Optionally, when the operating frequency of the compressor is in an increasing state, after controlling the compressor to execute the corresponding regulation strategy, it further includes: when the up-frequency adjustment amplitude of the compressor reaches the maximum amplitude, or when the up-frequency period of the compressor reaches the minimum period, controlling the compressor to perform regulation according to the maximum amplitude or the minimum period. In this way, the maximum value of the single-step adjustment of the compressor is restricted, ensuring the stability of the operation of the air-conditioning unit and avoiding damage or faults caused by poor performance. Similarly, the minimum up-frequency period of the compressor is defined to avoid performance degradation caused by frequent adjustment of the compressor.

[0018] In some embodiments, the device includes: a processor and a memory storing program instructions, and the processor is configured to execute the standby control method for an air-source heat pump air conditioner as described above when running the program instructions.

[0019] In some embodiments, the air-source heat pump air conditioner includes: an air-conditioning body; and the standby control device for an air-source heat pump air conditioner as described above, which is installed on the air-conditioning body.

[0020] In some embodiments, the computer-readable storage medium stores program instructions, and when the program instructions are running, they are used to cause a computer to execute the standby control method for an air-source heat pump air conditioner as described above.

[0021] The standby control method and device for an air-source heat pump air conditioner, the air-source heat pump air conditioner, and the computer storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0022] In the embodiments of the present disclosure, when a standby instruction is executed in the heating mode, the change rate of the water outlet temperature is obtained. Based on the magnitude of the change rate of the water outlet temperature and the first threshold, it is determined whether to perform intervention control on the current operating parameters of the air-conditioning unit. If so, the appropriate regulation object and regulation strategy are determined and executed in combination with the operating state of the compressor and the change stage of the water outlet temperature. Thereby, the intervention on the current operating parameters of the air-conditioning unit conforms to the current operating conditions of the unit and can prompt the unit to reach the standby condition. In this way, the air-conditioning unit can easily enter the standby state and avoid continuous operation for a long time.

[0023] The above general description and the following description are only exemplary and explanatory and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

[0025] Figure 1It is a schematic diagram of an air source heat pump air conditioner provided by an embodiment of the present disclosure;

[0026] Figure 2 It is a schematic structural diagram of an outdoor unit of an air source heat pump air conditioner provided by an embodiment of the present disclosure;

[0027] Figure 3 It is a schematic diagram of a standby control method for an air source heat pump air conditioner provided by an embodiment of the present disclosure;

[0028] Figure 4 It is a schematic diagram of another standby control method for an air source heat pump air conditioner provided by an embodiment of the present disclosure;

[0029] Figure 5 It is a schematic diagram of another standby control method for an air source heat pump air conditioner provided by an embodiment of the present disclosure;

[0030] Figure 6 It is a schematic diagram of a standby control device for an air source heat pump air conditioner provided by an embodiment of the present disclosure;

[0031] Figure 7 It is a schematic diagram of another air source heat pump air conditioner provided by an embodiment of the present disclosure.

[0032] Reference numerals:

[0033] 10: Outdoor unit; Compressor 11; 12: Four-way valve; 13: Second heat exchanger; 14: Throttling device; 15: First heat exchanger; 20: Indoor heat exchanger; 30: Water pump; 40: Water tank; 51: Inlet pipe; 52: Outlet pipe; 100: Standby control device for air source heat pump air conditioner; 101: Processor; 103: Communication interface; 102: Memory; 104: Bus; 200: Air source heat pump air conditioner. Detailed implementation manners

[0034] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference and illustration purposes only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0035] In the description, claims, and above-mentioned accompanying drawings of the embodiments of the present disclosure, terms such as "first" and "second" are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0036] Unless otherwise specified, the term "plurality" means two or more.

[0037] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0038] The term "and / or" is a description of the associated relationship of objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0039] The term "corresponding" may refer to an associated relationship or a binding relationship. A corresponding to B means that there is an associated relationship or a binding relationship between A and B.

[0040] Combined Figure 1 、 2 As shown, the air source heat pump air conditioner includes an outdoor unit 10 and a water circulation loop. Among them, the outdoor unit 10 includes a compressor 11, a first heat exchanger 15, a second heat exchanger 13, a four-way valve 12, and a throttling device 14; the compressor 11, the four-way valve 12, the first heat exchanger 15, the throttling device 14, and the second heat exchanger 13 form a refrigerant circulation loop. The water circulation loop includes a water tank 40, a water pump 30, a water inlet pipe 51, a water outlet pipe 52, and an indoor heat exchanger 20. The water circulation loop exchanges heat with the first heat exchanger 15. In the heating mode, the water in the water circulation loop releases heat to the indoor, and then the water with a lower temperature flows to the outdoor unit and exchanges heat with the condenser (i.e., the first heat exchanger) of the outdoor unit. The high-temperature water after absorbing heat releases the heat indoors. By controlling the water pump 30, the water flow rate in the water circulation loop can be adjusted.

[0041] Combined Figure 3 As shown, the embodiments of the present disclosure provide a standby control method for an air source heat pump air conditioner, including:

[0042] S101, when the processor responds to a standby instruction in the heating operation mode, obtain the change rate of the outlet water temperature.

[0043] S102, when the change rate of the outlet water temperature is less than the first threshold, determine the target regulation object and the corresponding regulation strategy according to the operating state of the compressor and the change stage of the outlet water temperature; the target regulation objects include the compressor and the water pump.

[0044] In S103, the processor controls the target regulation object to execute the corresponding regulation strategy, so that the air source heat pump air conditioner enters the standby state.

[0045] Here, a standby instruction is provided on the control terminal of the air source heat pump air conditioner; when the heating mode is running, the user does not want the air conditioner unit to run continuously for a long time. At this time, the standby instruction can be sent through the control terminal to adjust the operation of the air conditioner unit, so as to promote the air conditioner unit to meet the standby conditions and then enter the standby state. Among them, the control terminal can be the remote control of the air conditioner or the APP installed on the user terminal device. The outlet water temperature is the temperature of the high-temperature water flowing out of the outdoor unit; or the temperature of the high-temperature water flowing from the outdoor unit into the indoor unit. The first threshold is a preset value, and its value depends on user needs. The larger the first threshold, the greater the change rate of the outlet water temperature, and the actual outlet water temperature is easy to reach the target outlet water temperature, and the air conditioner unit can enter the standby mode in a shorter time. The smaller the first threshold, the smaller the change rate of the outlet water temperature, and the actual outlet water temperature reaches the target outlet water temperature more slowly, and the air conditioner unit needs a longer time to enter the standby mode. The condition for the air conditioner unit to standby is that the difference between the actual outlet water temperature and the target outlet water temperature is greater than or equal to a constant (this constant is set at the factory).

[0046] Specifically, by detecting the outlet water temperature multiple times, the change rate of the outlet water temperature can be obtained. Compare the change rate of the outlet water temperature with the first threshold. If the change rate of the outlet water temperature is greater than or equal to the first threshold, it indicates that the heating capacity of the air conditioner unit is strong and the air conditioner unit is easy to enter the standby state. In this case, the operation of the air conditioner unit is not intervened. If the change rate of the outlet water temperature is less than the first threshold, it indicates that the heating capacity of the air conditioner unit is weak and it is difficult for the air conditioner unit to enter the standby state. Therefore, in this case, the operation parameters of the air conditioner unit need to be adjusted to make the air conditioner unit meet the standby conditions. More specifically, according to the running frequency state of the compressor and the change stage of the outlet water temperature, the regulation object and the corresponding regulation strategy are determined. The running state of the compressor includes the compressor being in the frequency increasing state, the frequency maintaining state or the frequency decreasing state; the change stage of the outlet water temperature includes the outlet water temperature being in the rising stage, the maintaining stage or the falling stage.

[0047] It can be understood that under the same conditions, the higher the operating frequency of the compressor, the stronger the heating capacity of the air conditioner unit (at this time, the outlet water temperature is generally also in the rising stage, but may also be in the falling stage when the ambient temperature is low). The higher the outlet water temperature, the stronger the heating capacity of the air conditioner unit is also characterized (at this time, the compressor may be in the frequency increasing state or the frequency decreasing state). Therefore, the control object and control strategy are determined by combining the operating state of the compressor and the change stage of the outlet water temperature. As an example, when the outlet water temperature is in the rising stage, regardless of the operating state of the compressor at this time, controlling the compressor to increase the frequency or maintain the frequency can improve the change rate of the outlet water temperature. Therefore, the compressor is used as the target control object at this time, and the control strategy can be determined based on the operating state of the compressor. When the outlet water temperature is in the falling stage, if the compressor is in the frequency increasing state, the target control object is the water pump, and the control strategy is to reduce the water flow rate (when the compressor is in the frequency increasing stage but the outlet water temperature is still in the falling state, the capacity of the air conditioner unit cannot meet the current load, so reducing the water flow rate reduces the load). If the compressor is in the frequency decreasing state, the target control object is the compressor, and the control strategy is for the compressor to increase the frequency or maintain the frequency. In this way, by adjusting the operating parameters of the air conditioner unit, the air conditioner unit can easily reach the standby condition, and then enter the standby state to avoid long-term continuous operation.

[0048] When using the standby control method for an air-source heat pump air conditioner provided by the embodiment of the present disclosure, when executing the standby instruction, the change rate of the outlet water temperature is obtained. Based on the magnitude of the change rate of the outlet water temperature and the first threshold, it is determined whether to perform intervention control on the current operating parameters of the air conditioner unit. If so, the appropriate control object and control strategy are determined and executed by combining the operating state of the compressor and the change stage of the outlet water temperature. Thus, the intervention on the current operating parameters of the air conditioner unit conforms to the current operating conditions of the unit and can prompt the unit to reach the standby condition. In this way, the air conditioner unit can enter the standby state to avoid long-term continuous operation.

[0049] Optionally, in step S102, the processor determines the target control object according to the operating frequency state of the compressor and the change stage of the outlet water temperature, including:

[0050] When the operating state of the compressor is in the frequency decreasing state or the frequency maintaining state, if the change stage of the outlet water temperature is the rising stage, the processor determines that the target control object is the compressor; if the change stage of the outlet water temperature is the falling stage or the maintaining stage, the processor determines that the target control objects are the water pump and the compressor.

[0051] When the operating state of the compressor is in the frequency increasing state, the processor determines that the target control object is the compressor.

[0052] Here, when the outlet water temperature rises and reaches a certain temperature, the compressor will reduce its frequency or operate at the current operating frequency. That is, when the indoor temperature approaches the target temperature, the operating frequency of the compressor will decrease or remain unchanged. In this case, if the change stage of the outlet water temperature is the rising stage, adjusting the compressor can increase the change rate of the outlet water temperature, so the target control object is the compressor. If the change stage of the outlet water temperature is the falling stage or the maintaining stage, it indicates that when the indoor temperature approaches the target temperature, the compressor cannot meet the indoor demand after reducing its frequency or maintaining the frequency. Therefore, the target control objects are the compressor and the water pump. In this way, while maintaining or increasing the frequency of the compressor, adjusting the water flow rate can increase the change rate of the outlet water temperature, which helps to reach the standby condition. When the compressor is in the frequency increasing state, regardless of the change stage of the outlet water temperature, the target control object is determined to be the compressor. This is because when the compressor is in the frequency increasing stage but the change rate of the outlet water temperature is still small, adjusting the frequency of the compressor can improve the heating capacity, that is, increase the change rate of the outlet water temperature. In addition, in this case, adjusting the water volume will cause a large fluctuation in the indoor temperature if the adjustment range is large. Therefore, when the target control object can be selected, adjusting the compressor is given priority. This can minimize the fluctuation of the indoor temperature while prompting the air conditioner unit to enter the standby state.

[0053] Optionally, the target control objects are the water pump and the compressor. In step S102, according to the operating state of the compressor and the change stage of the outlet water temperature, a control strategy is determined, including:

[0054] The processor determines that the compressor maintains its current operating frequency and determines that the rotational speed of the water pump decreases by a first amplitude.

[0055] When the latest change rate of the outlet water temperature is less than the first threshold, the processor determines that the rotational speed of the water pump decreases by a second amplitude until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; where the adjustment amplitude of the rotational speed of the water pump decreases sequentially.

[0056] Here, when the target control objects are the water pump and the compressor, the control strategy is to maintain the current operating frequency of the compressor and reduce the water flow rate, that is, reduce the rotational speed of the water pump. As described above, the change rate of the outlet water temperature is small, and the compressor is in the frequency reduction or stable state due to the rising outlet water temperature. In this case, the influence of adjusting the operating frequency of the compressor on the change rate of the outlet water temperature is less than the influence of the water flow rate on the change rate of the outlet water temperature. Therefore, it is determined that the rotational speed of the water pump decreases by a first amplitude. If the water flow rate is reduced and then the change rate of the outlet water temperature is obtained again. If the latest change rate of the outlet water temperature is still less than the first threshold, the water flow rate is reduced again until the change rate of the outlet water is greater than or equal to the first threshold. Among them, during the adjustment process of the water flow rate, the adjustment amplitude of the water flow rate gradually decreases. That is, the adjustment amplitude of the corresponding rotational speed of the water pump also decreases sequentially. As an example, the first adjustment of the water flow rate reduces by A1m 3 / h, the water flow rate is reduced by A for the nth adjustment n m 3 / h, then A1 > A2 > …… > A n ; then the reduction amplitudes of the corresponding water pump speeds satisfy R1 > R2 > …… > R n . In this way, by gradually reducing the water flow rate to adjust the change rate of the outlet water temperature, on the one hand, the gradual adjustment avoids excessive one-time adjustment of the water flow rate, which seriously affects the indoor temperature. On the other hand, the adjustment amplitude of the water flow rate is relatively large in the initial stage, which can avoid multiple adjustments of the water flow rate, and at the same time makes the outlet water temperature have an obvious heating effect in the early stage of adjustment.

[0057] Optionally, the first amplitude is determined according to the corresponding relationship between the water flow rate and the water pump speed. The water flow rate is related to the heat output. When adjusting the outlet water temperature, the water flow rate is easy to calculate. After determining the reduction amplitude of the water flow rate, the target water flow rate is determined. Based on the relationship between the target water flow rate and the water pump speed, the target speed is determined, so that the first amplitude of the water pump speed can be determined. Thus, the control of the water flow rate is achieved by controlling the water pump speed.

[0058] Optionally, the target control object is the compressor. In step S102, the processor determines the control strategy according to the operating frequency state of the compressor and the change stage of the outlet water temperature, including:

[0059] When the operating state of the compressor is in the frequency reduction state or the holding state, the processor determines to maintain the current operating frequency of the compressor; and when the change rate of the latest outlet water temperature is less than the first threshold, the processor determines that the compressor increases the frequency at the second amplitude until the change rate of the latest outlet water temperature is greater than or equal to the first threshold.

[0060] When the operating state of the compressor is in the rising state, the processor determines the control strategy of the compressor according to the change stage of the outlet water temperature.

[0061] Here, the control strategy for the compressor as the target control object is described. Specifically, when the operating state of the compressor is in the frequency-down state or the hold state, the control strategy of the compressor is to first maintain the current operating frequency (mainly for the frequency-down state). If the change rate of the outlet water temperature is still less than the first threshold, the compressor performs frequency-up control. When the operating state of the compressor is in the frequency-up state, the control strategy of the compressor is determined in combination with the change stage of the outlet water temperature. Among them, different change stages of the outlet water temperature are provided with matching compressor control strategies. The control strategy of the compressor includes the adjustment of the operating frequency amplitude of the compressor and / or the adjustment of the frequency modulation period of the compressor. As an example, when the change stage of the outlet water temperature is the rising stage, the control strategy of the compressor is to increase the frequency. The rising of the outlet water temperature indicates that the change rate of the outlet water temperature is positive, but the change rate value is less than the first threshold; this shows that the compressor can increase the change rate of the outlet water temperature by increasing the frequency, so the frequency-up amplitude of the compressor can be increased. When the change stage of the outlet water temperature is the falling or hold stage, the control strategy of the compressor is to increase the frequency and increase the frequency-up rate. When the outlet water temperature is in the falling or hold stage, it indicates that the change rate of the outlet water is negative or zero. This shows that the current frequency-up of the compressor cannot effectively improve the change rate of the outlet water temperature, so the frequency-up rate can be increased on the basis of the frequency-up, or the frequency-up amplitude and the frequency-up rate can be increased simultaneously. In this way, a matching control strategy is selected according to the change stage of the outlet water temperature. Thus, it can be easier for the air conditioner unit to enter the standby condition.

[0062] In addition, in some embodiments, when the operating state of the compressor is in the frequency-hold state, it is determined that the compressor increases the frequency at the second amplitude until the latest change rate of the outlet water temperature is greater than or equal to the first threshold. Before adjusting the operating parameters of the air conditioner unit, the compressor is in the operating frequency-hold state. Without changing the operating parameters of the unit, it is meaningless to judge the change rate of the outlet water temperature again. Therefore, in this case, the latest change rate of the outlet water temperature can be obtained after the frequency is reduced. In this way, it also helps to improve the control efficiency.

[0063] Optionally, in step S102, when the operating state of the compressor is in the rising state, the processor determines the control strategy of the compressor according to the change stage of the outlet water temperature, including:

[0064] When the change stage of the outlet water temperature is the rising stage, the processor determines to increase the frequency-up amplitude of the compressor until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; among them, the adjustment amplitude of the compressor frequency increases in turn.

[0065] When the change stage of the outlet water temperature is the falling stage or the hold stage, the processor determines to shorten the frequency-up period of the compressor until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; among them, the frequency-up periods of the compressor are shortened in turn.

[0066] Here, when the operating state of the compressor is in the rising state, corresponding compressor control strategies are set for the water outlet temperature in the rising stage and the water outlet temperature in the falling or maintaining stage, respectively. Specifically, when the water outlet temperature is in the rising stage, the frequency increase amplitude of the compressor is increased, so as to accelerate the change rate of the rising water outlet temperature. Among them, the frequency increase amplitude adjusted each time is different, and the frequency increase amplitude shows an increasing trend. As an example, the initial frequency increase amplitude of the compressor is 1 rps, and the subsequent frequency increase is increased by 1 rps as the increment. Then the second frequency increase amplitude is 2 rps, and so on. When the water outlet temperature is in the falling or maintaining stage, while maintaining the actual frequency modulation amplitude of the compressor, the adjustment period is shortened. Among them, the shortened period shows a gradually decreasing trend. As an example, the initial frequency modulation period of the compressor is 120 s, and the shortening amplitude is 5 s. Then the second frequency modulation period is 115 s, and so on. In this way, by means of gradual adjustment, the change rate of the water outlet temperature is improved. While achieving the adjustment target, large fluctuations in the indoor temperature caused by overshoot are avoided.

[0067] Combined with Figure 4 As shown, the embodiments of the present disclosure provide another standby control method for an air source heat pump air conditioner, including:

[0068] S101, when the processor is in the heating operation mode and responds to the standby instruction, obtain the change rate of the water outlet temperature.

[0069] S102, when the change rate of the water outlet temperature is less than the first threshold, determine the target control object and the corresponding control strategy according to the operating frequency state of the compressor and the change stage of the water outlet temperature; the target control objects include the compressor and the water pump.

[0070] S103, the processor controls the target control object to execute the corresponding control strategy so that the air source heat pump air conditioner enters the standby state.

[0071] S204, when the target control object is the compressor and the operating frequency of the compressor reaches the limit frequency, if the latest change rate of the water outlet temperature is less than the first threshold, control the water pump speed to decrease.

[0072] S205, when the target control objects are the compressor and the water pump and the water pump speed reaches the limit speed, if the latest change rate of the water outlet temperature is less than the first threshold, control the compressor to increase the frequency and / or shorten the frequency increase period.

[0073] Here, when the target regulation object is the compressor, if the operating frequency of the compressor reaches the limit frequency after running the above regulation strategy, and the latest outlet water temperature change rate is still less than the first threshold, the water pump speed is controlled to decrease, that is, the water flow rate is controlled to decrease. Among them, the limit frequency is the maximum rated frequency of the compressor, or it can be the maximum operating frequency allowed for the compressor during safe operation. Similarly, when the target regulation objects are the compressor and the water pump, and the water pump speed reaches the limit speed and the latest outlet water temperature change rate is still less than the first threshold, the compressor is controlled to increase the frequency and / or shorten the frequency increase cycle. Among them, the limit speed refers to the minimum allowable speed of the water pump, that is, the water flow rate has a minimum value. In this way, through the linkage control of increasing the compressor frequency and reducing the water flow rate, the regulation of the outlet water temperature change rate is achieved, enabling the air-conditioning unit to enter the standby state.

[0074] Optionally, the value range of the limit frequency is from 100 rps to 120 rps, and the lower limit value of the water flow rate is 0.6 to 0.8 of the rated flow rate. As an example, the limit frequency is 110 rps, and the lower limit value of the water flow rate is 0.75 of the rated flow rate. And based on the corresponding relationship between the water flow rate and the water pump speed, the corresponding limit speed of the water pump can be determined. In this way, during the standby control process of the air-conditioning unit, the performance of the unit is not affected, and unit failures or damages are avoided.

[0075] Optionally, after step S204 or S205, it further includes:

[0076] The processor controls the air conditioner to restore to the operating parameters before regulation and corrects the first threshold.

[0077] After a preset duration, the processor regulates the compressor and the water pump according to the outlet water temperature change rate and the corrected first threshold. Among them, the corrected first threshold is less than the first threshold.

[0078] Here, as described above, the first threshold is set by the user based on requirements. In some scenarios, the first threshold set by the user cannot reach the standby condition under the linkage control of regulating the compressor frequency and the water flow rate. In this case, first control the air conditioner to restore the previous operating parameters. At the same time, downward correct the first threshold. The corrected first threshold becomes smaller, that is, the requirement for the outlet water temperature change rate decreases, and the outlet water temperature reaches the standby condition through a longer time. In this way, the problem that the requirement for the outlet water temperature change rate of the air-conditioning unit is too high and the performance of the air-conditioning unit cannot make the outlet water temperature reach the standby condition in a short time is avoided.

[0079] Optionally, the value range of the first threshold is [0.05 °C / min, 0.35 °C / min], and the first threshold can be divided into multiple gears. As an example, the relationship between the gears and the first threshold is shown in Table 1.

[0080] Table 1

[0081]

[0082]

[0083] In this way, the user can select a gear based on the demand, so as to set the time interval for the air conditioner unit to enter the standby state. In addition, when correcting the first threshold, it can be corrected sequentially based on the gear. If the current gear is gear 6, the corrected gear is gear 5.

[0084] Combined with Figure 5 As shown, an embodiment of the present disclosure provides another standby control method for an air source heat pump air conditioner, including:

[0085] S101, when the processor is in the heating operation mode and responds to the standby instruction, obtain the rate of change of the outlet water temperature.

[0086] S102, when the rate of change of the outlet water temperature is less than the first threshold, determine the target regulation object and the corresponding regulation strategy according to the operating frequency state of the compressor and the change stage of the outlet water temperature; the target regulation object includes the compressor and the water pump.

[0087] S103, the processor controls the target regulation object to execute the corresponding regulation strategy so that the air source heat pump air conditioner enters the standby state.

[0088] S304, when the operating frequency of the compressor is in the rising state, if the up-frequency adjustment amplitude of the compressor reaches the maximum amplitude, or the up-frequency cycle of the compressor reaches the minimum cycle, control the compressor to perform regulation according to the maximum amplitude or the minimum cycle.

[0089] Here, during the regulation process of the operating frequency of the compressor, the maximum up-frequency adjustment amplitude and the minimum up-frequency cycle of the compressor are limited. Taking the maximum up-frequency adjustment amplitude as an example, after multiple up-frequency adjustments, if the up-frequency adjustment amplitude reaches the maximum value, then the subsequent up-frequency adjustment process will always be adjusted at the maximum amplitude. As an example, the maximum amplitude is 5 rps, the initial up-frequency amplitude is 1 rps and the increase amplitude is 1 rps each time; then at the fifth up-frequency, the adjustment amplitude reaches 5 rps. Then in the subsequent up-frequency adjustment process, the up-frequency adjustment amplitude will always remain at 5 rps and will not increase. In this way, the maximum value of the single-step adjustment of the compressor is limited, ensuring the stable operation of the air conditioner unit and avoiding damage or failure caused by poor performance. Similarly, the minimum up-frequency cycle of the compressor is limited. As an example, the initial frequency modulation cycle of the compressor is 120 s, with a shortening amplitude of 10 s, and the minimum up-frequency cycle is 60 s. After several adjustments, the up-frequency cycle reaches 60 s, and then the subsequent adjustments will always be up-frequency at this minimum cycle. In this way, it is avoided that the performance deteriorates due to frequent adjustment of the compressor.

[0090] Another standby control method for an air source heat pump air conditioner provided by an embodiment of the present disclosure includes:

[0091] Step 1), in the heating operation mode, respond to a standby instruction and determine a first threshold; obtain the change rate of the water outlet temperature; determine whether the change rate of the water outlet temperature is less than the first threshold. If so, execute Step 2) or Step 3). If not, exit the current control.

[0092] Step 2), when the compressor is in the frequency increasing state, determine whether the water outlet temperature is in the rising stage; if so, increase the frequency increasing amplitude of the compressor until the latest change rate of the water outlet temperature is greater than or equal to the first threshold; wherein, the adjustment amplitude of the compressor frequency increases in sequence; if not, shorten the frequency increasing period of the compressor until the latest change rate of the water outlet temperature is greater than or equal to the first threshold; wherein, the frequency increasing period of the compressor shortens in sequence.

[0093] Step 3), when the compressor is in the frequency decreasing or maintaining the operating frequency state, determine whether the water outlet temperature is in the rising stage; if so, maintain the current operating frequency of the compressor; and when the latest change rate of the water outlet temperature is less than the first threshold, control the compressor to increase the frequency at a second amplitude until the latest change rate of the water outlet temperature is greater than or equal to the first threshold; if not, control the compressor to maintain the current operating frequency, and control the rotational speed of the water pump to decrease at a first amplitude; when the latest change rate of the water outlet temperature is less than the first threshold, determine that the rotational speed of the water pump decreases at a second amplitude until the latest change rate of the water outlet temperature is greater than or equal to the first threshold; wherein, the adjustment amplitude of the rotational speed of the water pump decreases in sequence.

[0094] Step 4), during the execution of Step 2) and 3), if the operating frequency of the compressor reaches the limit frequency and the latest change rate of the water outlet temperature is less than the first threshold, control the rotational speed of the water pump to decrease. If the rotational speed of the water pump reaches the limit speed and the latest change rate of the water outlet temperature is less than the first threshold, control the compressor to increase the frequency and / or shorten the frequency increasing period.

[0095] Combined with Figure 6 As shown, an embodiment of the present disclosure provides a standby control device 100 for an air source heat pump air conditioner, including a processor 101 and a memory 102. Optionally, the device 100 may further include a communication interface 103 and a bus 104. Wherein, the processor 101, the communication interface 103, and the memory 102 can complete communication with each other through the bus 104. The communication interface 103 can be used for information transmission. The processor 101 can call the logical instructions in the memory 102 to execute the standby control method for the air source heat pump air conditioner in the above embodiment.

[0096] In addition, when the logical instructions in the above-mentioned memory 102 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.

[0097] As a computer-readable storage medium, the memory 102 can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 101 executes functional applications and data processing by running the program instructions / modules stored in the memory 102, that is, implements the standby control method for the air source heat pump air conditioner in the above embodiments.

[0098] The memory 102 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 102 may include a high-speed random access memory and may also include a non-volatile memory.

[0099] Combined Figure 7 As shown, the embodiments of the present disclosure provide an air source heat pump air conditioner 200, including: an air conditioner body, and the above-mentioned standby control device 100 for the air source heat pump air conditioner. The standby control device 100 for the air source heat pump air conditioner is installed on the air conditioner body. The installation relationship described here is not limited to being placed inside the product body, but also includes installation connections with other components of the air conditioner 100, including but not limited to physical connections, electrical connections, or signal transmission connections, etc. Those skilled in the art can understand that the standby control device 100 for the air source heat pump air conditioner can be adapted to a feasible product body, and then implement other feasible embodiments.

[0100] The embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are set to execute the above-mentioned standby control method for the air source heat pump air conditioner.

[0101] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, for example: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc, etc., which are various media that can store program codes.

[0102] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. Embodiments merely represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terms used in this application are only for describing embodiments and do not limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups of these. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, or apparatus including the element. Herein, each embodiment may focus on the differences from other embodiments, and the same or similar parts among the embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts may refer to the description of the method parts.

[0103] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner may depend on the specific application and design constraints of the technical solution. The skilled person may use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0104] In the embodiments disclosed in this article, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, in the embodiments of the present disclosure, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0105] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the blocks can also occur in a different order from that marked in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks can also occur in a different order from that disclosed in the description. Sometimes, there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. Each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A standby control method for an air source heat pump air conditioner, characterized in that Including: When in the heating operation mode in response to a standby instruction, obtain the change rate of the outlet water temperature; When the change rate of the outlet water temperature is less than the first threshold, determine the target regulation object and the corresponding regulation strategy according to the operating state of the compressor and the change stage of the outlet water temperature; The target regulation objects include the compressor and the water pump; Control the target regulation object to execute the corresponding regulation strategy so that the air source heat pump air conditioner enters the standby state.

2. The method according to claim 1, characterized in that, Determine the target regulation object according to the operating state of the compressor and the change stage of the outlet water temperature, including: When the operating state of the compressor is in the frequency reduction state or the frequency holding state, if the change stage of the outlet water temperature is the rising stage, determine the target regulation object as the compressor; if the change stage of the outlet water temperature is the falling stage or the holding stage, determine the target regulation objects as the water pump and the compressor; When the operating state of the compressor is in the frequency increase state, determine the target regulation object as the compressor.

3. The method according to claim 2, wherein The target regulation objects are the water pump and the compressor. Determine the regulation strategy according to the operating state of the compressor and the change stage of the outlet water temperature, including: Determine that the compressor maintains the current operating frequency, and determine that the rotational speed of the water pump decreases by the first amplitude; When the latest change rate of the outlet water temperature is less than the first threshold, determine that the rotational speed of the water pump decreases by the second amplitude until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; Wherein, the amplitude of the water pump rotational speed adjustment decreases in sequence.

4. The method according to claim 2, characterized in that The target regulation object is the compressor. Determine the regulation strategy according to the operating state of the compressor and the change stage of the outlet water temperature, including: When the operating state of the compressor is in the frequency reduction state or the frequency holding state, determine to maintain the current operating frequency of the compressor; and when the latest change rate of the outlet water temperature is less than the first threshold, determine that the compressor increases the frequency by the second amplitude until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; When the operating state of the compressor is in the frequency increase state, determine the regulation strategy of the compressor according to the change stage of the outlet water temperature.

5. The method according to claim 4, characterized in that Determine the regulation strategy of the compressor according to the change stage of the outlet water temperature, including: When the change stage of the outlet water temperature is the rising stage, determine to increase the frequency increase amplitude of the compressor until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; wherein, the amplitude of the compressor frequency adjustment increases in sequence; When the change stage of the outlet water temperature is the falling stage or the holding stage, determine to shorten the frequency increase cycle of the compressor until the latest change rate of the outlet water temperature is greater than or equal to the first threshold; wherein, the frequency increase cycle of the compressor shortens in sequence.

6. The method according to any one of claims 1 to 5, characterized in that After controlling the target regulation object to execute the corresponding regulation strategy, it further includes: When the target regulation object is the compressor and the operating frequency of the compressor reaches the limit frequency, if the latest change rate of the outlet water temperature is less than the first threshold, control the rotational speed of the water pump to decrease; When the target regulation objects are the compressor and the water pump and the rotational speed of the water pump reaches the limit rotational speed, if the latest change rate of the outlet water temperature is less than the first threshold, control the compressor to increase the frequency and / or shorten the frequency increase cycle.

7. The method according to any one of claims 1 to 6, characterized in that, When the operating frequency of the compressor is in an increasing state, after controlling the compressor to execute the corresponding regulation strategy, it further includes: When the frequency increase adjustment amplitude of the compressor reaches the maximum amplitude, or when the frequency increase cycle of the compressor reaches the minimum cycle, control the compressor to perform regulation according to the maximum amplitude or the minimum cycle.

8. A standby control device for an air source heat pump air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute the standby control method for an air source heat pump air conditioner according to any one of claims 1 to 7 when running the program instructions.

9. An air source heat pump air conditioner, characterized in that, It includes: An air conditioner body; The standby control device for an air source heat pump air conditioner according to claim 8, which is installed on the air conditioner body.

10. A computer-readable storage medium storing program instructions, characterized in that, When the program instructions are running, they are used to cause the computer to execute the standby control method for an air source heat pump air conditioner according to any one of claims 1 to 7.

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