Control methods and devices for water pump speed in heat pump units; heat pump units

Abstract

This application relates to a method and apparatus for controlling the water pump speed in a heat pump unit, and the heat pump unit itself. The method includes: when the energy-saving mode of the heat pump unit is activated, acquiring the energy efficiency value corresponding to each speed of the heat pump unit as the water pump speed decreases from speed N to speed M, wherein speed N is the current speed of the water pump; the next speed after speed M is either the speed at which the water flow protection switch is activated, or speed M is the lowest speed of the water pump; N and M are both positive integers, and N is greater than M; determining the maximum energy efficiency value from all acquired energy efficiency values; and controlling the water pump speed to be consistent with the speed corresponding to the maximum energy efficiency value. This application solves the problem in related technologies where the water pump always maintains the highest speed when the air source heat pump unit is running, resulting in excessive power consumption.

Description

Technical Field

[0001] This application relates to the field of water pump control in heat pump units, and more particularly to a method and device for controlling the water pump speed in a heat pump unit, and a heat pump unit. Background Technology

[0002] Current air source heat pump units maintain the highest pump speed regardless of changes in external load or user demands. This results in excessive energy consumption and high operating costs because the pump continues to operate at its highest speed even when such a large water flow is not required. There is currently no effective solution to these problems in the technology. Summary of the Invention

[0003] This application provides a method and device for controlling the water pump speed in a heat pump unit, and a heat pump unit, to solve the problem in related technologies where the water pump always maintains the highest speed when the air source heat pump unit is running, resulting in a large amount of power consumption.

[0004] In a first aspect, this application provides a method for controlling the pump speed in a heat pump unit, comprising: when the energy-saving mode of the heat pump unit is activated, acquiring the energy efficiency value corresponding to the heat pump unit at each speed as the pump speed in the heat pump unit decreases from the Nth speed to the Mth speed, wherein the Nth speed is the current speed of the pump; the next speed after the Mth speed is the speed at which the water flow protection switch is turned on, or the Mth speed is the lowest speed of the pump; N and M are both positive integers, and N is greater than M; determining the maximum energy efficiency value from all acquired energy efficiency values; and controlling the pump speed to be consistent with the speed corresponding to the maximum energy efficiency value.

[0005] Optionally, during the process of downgrading the pump speed in the heat pump unit from the Nth speed to the Mth speed, the energy efficiency value corresponding to the heat pump unit at each speed includes: S11, when the pump is at the Nth speed and the water flow protection switch is not turned on, obtaining the Nth energy efficiency value of the heat pump unit; S12, downgrading the pump speed by one speed and determining whether the water flow protection switch is turned on; S13, when the water flow protection switch is not turned on, obtaining the (N-1)th energy efficiency value of the heat pump unit; S14, when the water flow protection switch is turned on, stopping the acquisition of the energy efficiency value of the heat pump unit; S15, decreasing N-1 sequentially to M, executing steps S12 to S14 once for each reduction of 1, until the Mth energy efficiency value of the heat pump unit is obtained.

[0006] Optionally, obtaining the energy efficiency value of the heat pump unit includes: obtaining the current heating energy of the heat pump unit and the current power of the heat pump unit; and determining the ratio of the heating energy to the power as the energy efficiency value.

[0007] Optionally, the method includes: when the heat pump unit switches from energy-saving mode to silent mode, sequentially reducing the speed of the water pump until the speed before the water flow protection switch is activated, and determining the speed before the water flow protection switch is activated as the water pump operating speed of the heat pump unit; or, when the heat pump unit switches from energy-saving mode to silent mode, if the water flow protection switch is not activated during the process of sequentially reducing the speed of the water pump to the lowest speed, then the lowest speed is determined as the water pump operating speed of the heat pump unit.

[0008] Optionally, the method further includes: when the heat pump unit switches from energy-saving mode to normal mode, sequentially reducing the set temperature of the heat pump unit from a first temperature value, and sequentially reducing the pump speed from the highest level to the lowest level or the level before the water flow protection is activated during each temperature reduction process; acquiring the energy efficiency value of the heat pump unit during each pump speed adjustment during each temperature reduction process until the temperature drops to a second temperature value, wherein the first temperature value is the maximum temperature value within a preset temperature range, and the second temperature value is the minimum temperature value within the preset temperature range; determining the maximum energy efficiency value from the acquired energy efficiency value, and determining the temperature value corresponding to the maximum energy efficiency value as the current set temperature of the heat pump unit, and determining the pump speed corresponding to the maximum energy efficiency value as the current operating speed of the water pump.

[0009] Optionally, the set temperature of the heat pump unit is sequentially reduced from a first temperature value, and the pump speed is sequentially reduced from the highest level to the lowest level or the level before the water flow protection is activated during each temperature reduction, and the energy efficiency value of the heat pump unit is obtained for each pump speed adjustment during each temperature reduction until the temperature drops to a second temperature value, including: S21, setting the set temperature of the heat pump unit to the first temperature value; S22, sequentially reducing the pump speed from the highest level to the lowest level or the level before the water flow protection is activated, and obtaining the energy efficiency value of the heat pump unit for each pump speed adjustment; S23, executing S21 and S22 once for each degree of temperature reduction, until the temperature drops to the second temperature value.

[0010] Secondly, this application provides a control device for the water pump speed in a heat pump unit, comprising: a first processing module, configured to, when the energy-saving mode of the heat pump unit is activated, acquire the energy efficiency value corresponding to each speed of the heat pump unit as the water pump speed decreases from the Nth speed to the Mth speed, wherein the Nth speed is the current speed of the water pump; the next speed after the Mth speed is the speed at which the water flow protection switch is turned on, or the Mth speed is the lowest speed of the water pump; N and M are both positive integers, and N is greater than M; a determining module, configured to determine the maximum energy efficiency value from all acquired energy efficiency values; and a control module, configured to control the water pump speed to be consistent with the speed corresponding to the maximum energy efficiency value.

[0011] Optionally, the first processing module is used to perform the following steps: S11, when the water pump is at the Nth gear and the water flow protection switch is not turned on, obtain the Nth energy efficiency value of the heat pump unit; S12, reduce the gear of the water pump by one gear and determine whether the water flow protection switch is turned on; S13, when the water flow protection switch is not turned on, obtain the N-1th energy efficiency value of the heat pump unit; S14, when the water flow protection switch is turned on, stop obtaining the energy efficiency value of the heat pump unit; S15, decrease N-1 sequentially to M, and execute steps S12 to S14 once for each decrease of 1, until the Mth energy efficiency value of the heat pump unit is obtained.

[0012] Thirdly, this application provides a heat pump unit, including: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to execute the water pump speed control method in the heat pump unit described in the first aspect of this application.

[0013] Fourthly, this application also provides a computer storage medium storing computer-executable instructions for executing the water pump speed control method in the heat pump unit described in the first aspect of this application.

[0014] Compared with the prior art, the technical solution provided in this application has the following advantages: In this application embodiment, the current speed of the water pump in the heat pump unit can be sequentially reduced to find the water pump speed corresponding to the highest energy efficiency value when the water flow protection switch is not turned on. The speed of the water pump in the heat pump unit is then controlled based on the found speed. It can be seen that in this application embodiment, by reducing the water pump speed through energy efficiency value comparison, while meeting basic requirements (water flow protection switch not turned on), the speed of the water pump in the heat pump unit can be controlled at the speed corresponding to the highest energy efficiency value. This saves power consumption while ensuring the normal operation of the heat pump unit, solving the problem in related technologies where the water pump always maintains the highest speed, leading to excessive power consumption. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 A flowchart illustrating a method for controlling the water pump speed in a heat pump unit, as provided in this application embodiment;

[0019] Figure 2 This is one of the optional flowcharts for a method of controlling the water pump speed in a heat pump unit provided in an embodiment of this application;

[0020] Figure 3 A second optional flowchart of a method for controlling the water pump speed in a heat pump unit provided in an embodiment of this application;

[0021] Figure 4 A flowchart of a method for intelligently adjusting water pump speed based on energy efficiency provided in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the structure for controlling the water pump speed in a heat pump unit provided in an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0026] To address the problem of excessive power consumption caused by the water pump always operating at its highest speed in related technologies when air-source heat pump units are running, this application provides a method for controlling the water pump speed in a heat pump unit, such as... Figure 1 As shown, the steps of this method include:

[0027] Step 101: When the energy-saving mode of the heat pump unit is activated, obtain the energy efficiency value of the heat pump unit at each speed as the water pump speed in the heat pump unit decreases from speed N to speed M. Here, speed N is the current speed of the water pump; the next speed after speed M is the speed at which the water flow protection switch is turned on, or speed M is the lowest speed of the water pump; N and M are both positive integers, and N is greater than M.

[0028] In this embodiment, the heat pump unit can be an air source heat pump unit. Furthermore, the water pump in this embodiment has multiple speed settings, such as six speed settings, where the sixth speed is the highest and the first speed is the lowest. Therefore, if N is currently 6, the water pump in the heat pump unit is at the sixth speed setting. The value of M needs to be determined based on actual needs. If the speed is continuously reduced to the lowest setting (first speed), and the water flow protection switch is not activated, then M is 1, representing the first speed setting. If the water pump speed is reduced to the second speed setting, and the water flow protection switch is activated, then M is 3, representing the third speed setting.

[0029] Furthermore, in this embodiment, if the water flow rate of the heat pump unit is too low, the heat exchanger may be damaged due to water shortage, thus affecting the safe operation of the unit. To avoid this situation, the unit will shut down, i.e., activate the water flow protection switch. In other words, the water flow protection switch in this embodiment is used to protect the heat pump unit under special circumstances.

[0030] Step 102: Determine the maximum energy efficiency value from all the obtained energy efficiency values;

[0031] In this embodiment, the energy efficiency value is a ratio representing the current heating energy of the heat pump unit to the unit's power. A higher ratio indicates a higher heating efficiency. If the current energy efficiency value is high, and the water pump is at a low speed and the water flow protection switch is not activated, it indicates that the current heat pump unit has a high cost-effectiveness in terms of electricity consumption.

[0032] Step 103: Control the water pump to be at the same speed as the speed corresponding to the maximum energy efficiency value.

[0033] Through steps 101 to 103 described above, in this embodiment of the application, the current speed of the water pump in the heat pump unit can be sequentially reduced to find the water pump speed corresponding to the highest energy efficiency value when the water flow protection switch is not turned on. The speed of the water pump in the heat pump unit is then controlled based on the found speed. Therefore, in this embodiment of the application, by reducing the water pump speed through energy efficiency value comparison, while meeting basic requirements (water flow protection switch not turned on), the speed of the water pump in the heat pump unit can be controlled at the speed corresponding to the highest energy efficiency value. This saves electricity consumption while ensuring the normal operation of the heat pump unit, solving the problem in related technologies where the water pump always maintains the highest speed, leading to excessive electricity consumption when the air source heat pump unit is running.

[0034] In this embodiment, during the downshifting process of the water pump, the energy efficiency value before and after each downshift is compared to determine which of the two downshifts has a higher energy efficiency value. The downshifting continues to determine the final maximum energy efficiency value until the water flow protection switch is activated or the pump is downshifted to its lowest setting. Based on this, the method for obtaining the energy efficiency value of the heat pump unit at each downshifting speed from the Nth to the Mth speed in step 101 of this embodiment can further include:

[0035] S11, when the water pump is in the Nth gear and the water flow protection switch is not turned on, obtain the Nth energy efficiency value of the heat pump unit;

[0036] S12, reduce the pump speed by one level and check if the water flow protection switch is turned on;

[0037] S13, when the water flow protection switch is not turned on, obtain the N-1th energy efficiency value of the heat pump unit;

[0038] S14, when the water flow protection switch is turned on, stop acquiring the energy efficiency value of the heat pump unit;

[0039] S15, reduce N-1 sequentially to M, and execute steps S12 to S14 once for each reduction of 1, until the Mth energy efficiency value of the heat pump unit is obtained.

[0040] For steps 11 to S15 above, in a specific example, taking N as 6, the energy efficiency value is obtained when the water pump is at the sixth speed setting. Then, the water pump speed is reduced to determine whether the current water flow protection switch is on when the water pump is at the fifth speed setting. If it is on, the sixth speed setting is the most energy-efficient setting. If the water flow protection switch is not on, the energy efficiency values ​​of the heat pump unit at the sixth and fifth speed settings need to be compared to determine the higher energy efficiency value. Then, the speed is reduced again, and the above process is repeated until the current water pump speed is the lowest setting or before the water flow protection switch is activated. Each speed reduction determines the corresponding energy efficiency value, thereby determining the highest energy efficiency value. That is, the water pump speed corresponding to the highest energy efficiency value is the most energy-efficient setting.

[0041] In this embodiment, the user can adjust the mode according to actual needs. The above example shows that the user's need is energy saving, so the heat pump unit is set to energy-saving mode. In some scenarios, the user needs the heat pump unit to operate in normal mode. In normal mode, the user typically sets a preset temperature range to represent the desired temperature. The heat pump unit can then be set for each temperature value within this preset range, and the energy efficiency value of the heat pump unit corresponding to different pump speeds at each temperature value is determined. The temperature value and speed with the highest energy efficiency are then found. This method can meet the user's needs while further saving electricity. Based on this, as... Figure 2 As shown, the method in this application embodiment may further include:

[0042] Step 201: When the heat pump unit switches from energy-saving mode to normal mode, the set temperature of the heat pump unit is gradually reduced from the first temperature value, and the water pump speed is gradually reduced from the highest level to the lowest level or the level before the water flow protection is activated during each temperature reduction process. The energy efficiency value of the heat pump unit is obtained for each water pump speed adjustment during each temperature reduction process until the temperature drops to the second temperature value. The first temperature value is the maximum temperature value within the preset temperature range, and the second temperature value is the minimum temperature value within the preset temperature range.

[0043] Step 202: Determine the maximum energy efficiency value from the obtained energy efficiency value, and determine the temperature value corresponding to the maximum energy efficiency value as the set temperature of the current heat pump unit, and determine the operating level of the current water pump by determining the water pump level corresponding to the maximum energy efficiency value.

[0044] In this specific example, the water pump in the heat pump unit has speed settings from level six to level one, with level six being the highest and level one the lowest. The current preset range is 25℃ to 29℃, meaning the first temperature value is 29℃. Therefore, with the heat pump unit set at 29℃, the water pump speed is adjusted sequentially from the highest to the lowest, or to the level before the water flow protection switch is activated. Each speed adjustment yields the corresponding energy efficiency value for the heat pump unit. Then, the set temperature is set to 28℃, and a similar process is performed for 29℃, determining the energy efficiency values ​​for different water pump speeds at that temperature. This process is repeated for 27℃ to 25℃, until all energy efficiency values ​​for different speeds are determined for each temperature value. Finally, the highest energy efficiency value is selected from these values. The temperature and water pump speed corresponding to this highest energy efficiency value are the current set temperature and the actual water pump speed at that temperature. It should be noted that if there are multiple maximum energy efficiency values, the lowest setting is determined from the water pump settings corresponding to those maximum energy efficiency values. This method can meet the user's temperature requirements while further saving electricity.

[0045] The method described in step 201 above, which involves sequentially lowering the set temperature of the heat pump unit from the first temperature value, and sequentially lowering the water pump speed from the highest speed to the lowest speed or the speed before the water flow protection is activated during each temperature decrease, and obtaining the energy efficiency value of the heat pump unit at each water pump speed adjustment during each temperature decrease until the temperature decreases to the second temperature value, may further include:

[0046] S21, set the heat pump unit's set temperature to the first temperature value;

[0047] S22, reduce the water pump speed from the highest level to the lowest level or the level before the water flow protection is activated, and record the energy efficiency value of the heat pump unit each time the water pump speed is adjusted.

[0048] S23: For each degree the temperature decreases, S21 and S22 are executed once, until the temperature decreases to the second temperature value.

[0049] As can be seen, in this embodiment of the application, for each temperature value within a preset temperature range, the water pump speed will be adjusted sequentially from the highest to the lowest or to the speed before the water flow protection switch is turned on, thereby determining the highest energy efficiency value, which can further save energy while meeting user needs.

[0050] In this embodiment, the user can adjust the mode according to actual needs. The user's need is energy saving, so the heat pump unit is set to energy-saving mode. In some scenarios, the user needs the heat pump unit to operate in silent mode. In silent mode, the noise level of the current heat pump unit is prioritized; therefore, it is only necessary to reduce the water pump speed to the lowest setting or before the water flow protection switch is activated. Based on this, as... Figure 3 As shown, the method steps in this application embodiment further include:

[0051] Step 301: When the heat pump unit switches from energy-saving mode to silent mode, the water pump speed is sequentially reduced until the speed before the water flow protection switch is activated, and the speed before the water flow protection switch is activated is set as the water pump operating speed of the heat pump unit; or,

[0052] Step 302: When the heat pump unit switches from energy-saving operation mode to silent mode, if the water flow protection switch does not turn on during the process of gradually reducing the water pump speed to the lowest speed, then the lowest speed is determined as the water pump operation speed of the heat pump unit.

[0053] In a specific example, if the current water pump setting is the sixth level, the pump will be lowered sequentially. If the flow protection switch activates at the second level, the third level will be set as the operating level. If the flow protection switch does not activate even when the pump is lowered to the first level, the first level will be set as the operating level. Therefore, in silent mode, simply lowering the pump to the lowest level or the level before the flow protection switch activates will suffice. This method also reduces power consumption to some extent in silent mode.

[0054] In this embodiment of the application, the method for obtaining the energy efficiency value of the heat pump unit involved in step 102 above may further include:

[0055] Step 31: Obtain the heating energy and power of the current heat pump unit;

[0056] Step 32: Determine the ratio of heating energy to power as the energy efficiency value.

[0057] The present application will now be explained in detail with reference to specific embodiments of the present application. These specific embodiments provide a method for intelligently adjusting water pump speeds based on energy efficiency, such as... Figure 4 As shown, the steps of this method include:

[0058] Step 401, determine user needs;

[0059] Step 402, the user's requirement is energy saving;

[0060] Step 403, the user's requirement is to mute;

[0061] Step 404: When the user's requirement is energy saving, the unit detects the capacity Qn and power Pn of the current water pump speed n, and calculates the energy efficiency COPn = Qn / Pn.

[0062] Step 405: Downshift one gear from the current gear n;

[0063] Step 406: Determine whether the water pump has activated the flow switch protection; if yes, proceed to step 415; otherwise, proceed to step 407.

[0064] Step 407: Continue to test the pump's capacity Qm and power Pm at speed m, and calculate COPm = Qm / Pm.

[0065] Step 408: If the water flow protection switch does not report, compare COPn and COPm.

[0066] Step 409: If COPn is large, determine whether the current pump speed m is lower than 1; if it is lower than 1, proceed to step 405; if it is higher than 1, proceed to step 405.

[0067] Step 410: If COPm is large, compare all COPm values ​​and take the maximum value.

[0068] Step 411: If the user's requirement is to mute, determine whether the current gear is lower than gear 1; if yes, proceed to step 415; otherwise, proceed to step 412.

[0069] Step 412: Is the water pump's water flow protection switch turned on? If not, proceed to step 413; if yes, proceed to step 414.

[0070] Step 413: Decrease the current gear by one and return to step 411;

[0071] Step 414: Increment the current gear by one and proceed to step 415;

[0072] Step 415: Determine the most energy-efficient setting.

[0073] Through the above steps, it can be seen that when the user's requirement for the air source heat pump to produce hot water is energy saving, the unit detects the capacity Qn and power Pn of the current water pump level n, and calculates the energy efficiency COPn = Qn / Pn. Based on the current level n, lower the level by one level: level m, and determine whether the water pump reports the water flow switch protection. If it does not report the water flow protection switch, continue to detect the capacity Qm and power Pm of the water pump level m, and calculate COPm = Qm / Pm. If it reports the water flow protection switch, determine that the highest energy efficiency level is level n, and the water pump level n is the most energy-efficient level of the unit. If it does not report the water flow protection switch, compare COPn and COPm. If COPn is larger, determine whether the current water pump level m is lower than level 1. If it is higher than level 1, return to step (3); if it is not higher than level 1, determine that the highest energy efficiency level is level n, and the water pump level n is the most energy-efficient level of the unit. If the COPM is large, compare all COPM values ​​and take the maximum value until the required energy efficiency level is determined. The highest energy efficiency level is determined to be level m, and the water pump level m is the most energy-efficient level for the unit.

[0074] If the user requires quiet operation of the air source heat pump for hot water, first determine if the current pump speed is below level 1. If it is above level 1, check if the current pump speed triggers the water flow protection switch. If it does not, lower the pump speed by one level until the water flow protection switch is triggered. If the water flow protection switch is triggered, continue until the required energy efficiency level is determined. The highest energy efficiency level is the current pump speed, which is the most energy-efficient setting for the unit. If the current pump speed is below level 1, the highest energy efficiency level is determined, and the most energy-efficient setting for the unit is the current pump speed.

[0075] As can be seen, in this embodiment, without affecting the operation of the unit, intelligent adjustments are made at the water pump level to meet different functional needs and user experiences. This allows the unit to provide users with the desired experience in addition to fulfilling normal cooling and heating requirements, enabling the unit to operate at the most energy-efficient water pump setting and reducing operating costs. Simultaneously, it prevents serious consequences such as water flow switch protection failures and unit shutdowns.

[0076] Corresponding to the above Figure 1 This application also provides a control device for the water pump speed in a heat pump unit, such as... Figure 5 As shown, the device includes:

[0077] The first processing module 502 is used to obtain the energy efficiency value of the heat pump unit at each speed as the water pump speed in the heat pump unit is downgraded from the Nth speed to the Mth speed when the energy-saving mode of the heat pump unit is started. Here, the Nth speed is the current speed of the water pump; the next speed after the Mth speed is the speed at which the water flow protection switch is turned on, or the Mth speed is the lowest speed of the water pump; N and M are both positive integers, and N is greater than M.

[0078] The determination module 504 is used to determine the maximum energy efficiency value from all the acquired energy efficiency values;

[0079] The control module 506 is used to control the water pump to be at the same speed as the speed corresponding to the maximum energy efficiency value.

[0080] The apparatus of this application embodiment allows for the sequential reduction of the current pump speed in a heat pump unit to find the pump speed corresponding to the highest energy efficiency value when the water flow protection switch is not activated. The pump speed in the heat pump unit is then controlled based on the found speed. Therefore, in this application embodiment, by reducing the pump speed through energy efficiency comparison, while meeting basic requirements (water flow protection switch not activated), the pump speed in the heat pump unit can be controlled at the speed corresponding to the highest energy efficiency value. This saves electricity consumption while ensuring the normal operation of the heat pump unit, solving the problem in related technologies where the water pump always maintains the highest speed, leading to excessive electricity consumption when the air source heat pump unit is running.

[0081] In an optional embodiment of this application, the first processing module is used to perform the following steps:

[0082] S11, when the water pump is in the Nth gear and the water flow protection switch is not turned on, obtain the Nth energy efficiency value of the heat pump unit;

[0083] S12, reduce the pump speed by one level and check if the water flow protection switch is turned on;

[0084] S13, when the water flow protection switch is not turned on, obtain the N-1th energy efficiency value of the heat pump unit;

[0085] S14, when the water flow protection switch is turned on, stop acquiring the energy efficiency value of the heat pump unit;

[0086] S15, reduce N-1 sequentially to M, and execute steps S12 to S14 once for each reduction of 1, until the Mth energy efficiency value of the heat pump unit is obtained.

[0087] In an optional embodiment of this application, the first processing module in this application embodiment is further configured to obtain the energy efficiency value of the heat pump unit by: obtaining the heating energy of the current heat pump unit and the power of the current heat pump unit; and determining the ratio of heating energy to power as the energy efficiency value.

[0088] In an optional embodiment of this application, the device further includes: a second processing module, configured to sequentially reduce the pump speed until the water flow protection switch is activated when the heat pump unit switches from energy-saving mode to silent mode, and determine the water pump operating speed of the heat pump unit as the water pump operating speed of the heat pump unit; or, a third processing module, configured to determine the lowest speed as the water pump operating speed of the heat pump unit if the water flow protection switch is not activated during the process of sequentially reducing the pump speed to the lowest speed when the heat pump unit switches from energy-saving mode to silent mode.

[0089] In an optional embodiment of this application, the apparatus further includes: a fourth processing module, configured to, when the heat pump unit switches from energy-saving mode to normal mode, sequentially reduce the set temperature of the heat pump unit from a first temperature value, and sequentially reduce the pump speed from the highest level to the lowest level or the level before the water flow protection is activated during each temperature reduction process, and acquire the energy efficiency value of the heat pump unit during each pump speed adjustment during each temperature reduction process until the temperature drops to a second temperature value, wherein the first temperature value is the maximum temperature value within a preset temperature range, and the second temperature value is the minimum temperature value within the preset temperature range; and a fifth processing module, configured to determine the maximum energy efficiency value from the acquired energy efficiency value, determine the temperature value corresponding to the maximum energy efficiency value as the current set temperature of the heat pump unit, and determine the pump speed corresponding to the maximum energy efficiency value as the current operating speed of the water pump.

[0090] In an optional embodiment of this application, the fourth processing module in this application is used to perform the following steps:

[0091] S21, set the heat pump unit's set temperature to the first temperature value;

[0092] S22, reduce the water pump speed from the highest level to the lowest level or the level before the water flow protection is activated, and record the energy efficiency value of the heat pump unit each time the water pump speed is adjusted.

[0093] S23: For each degree the temperature decreases, S21 and S22 are executed once, until the temperature decreases to the second temperature value.

[0094] like Figure 6 As shown in the figure, this application provides an electronic device, including a processor 611, a communication interface 612, a memory 613, and a communication bus 614, wherein the processor 611, the communication interface 612, and the memory 613 communicate with each other through the communication bus 614.

[0095] Memory 613 is used to store computer programs;

[0096] In one embodiment of this application, when the processor 611 executes the program stored in the memory 613, it implements the method for controlling the water pump speed in the heat pump unit provided in any of the aforementioned method embodiments. Its function is similar and will not be described again here.

[0097] It should be noted that the electronic device in this embodiment is built into the heat pump unit and is used to realize intelligent control of the water pump.

[0098] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the method for controlling the water pump speed in a heat pump unit as provided in any of the foregoing method embodiments.

[0099] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0100] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0101] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0102] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for controlling the water pump speed in a heat pump unit, characterized in that, include: When the energy-saving mode of the heat pump unit is activated, the energy efficiency value corresponding to each gear of the heat pump unit is obtained as the pump speed in the heat pump unit decreases from gear N to gear M. Here, gear N is the current gear of the pump; the next gear after gear M is the gear at which the water flow protection switch is turned on, or gear M is the lowest gear of the pump; N and M are both positive integers, and N is greater than M; the energy efficiency value is a ratio representing the current heating energy of the heat pump unit to the power of the unit. The maximum energy efficiency value is determined from all the energy efficiency values ​​obtained; The pump speed is controlled to be consistent with the speed corresponding to the maximum energy efficiency value; The method further includes: When the heat pump unit switches from energy-saving mode to normal mode, the set temperature of the heat pump unit is gradually reduced from the first temperature value, and the water pump speed is gradually reduced from the highest speed to the lowest speed or the speed before the water flow protection is activated during each temperature reduction. The energy efficiency value of the heat pump unit is obtained for each water pump speed adjustment during each temperature reduction until the temperature drops to the second temperature value. The first temperature value is the maximum temperature value within the preset temperature range, and the second temperature value is the minimum temperature value within the preset temperature range. The maximum energy efficiency value is determined from the obtained energy efficiency value, and the temperature value corresponding to the maximum energy efficiency value is determined as the set temperature of the current heat pump unit, and the water pump speed corresponding to the maximum energy efficiency value is determined as the current water pump operating speed. If there are multiple maximum energy efficiency values, the lowest speed is determined from the water pump speeds corresponding to the multiple maximum energy efficiency values.

2. The method according to claim 1, characterized in that, During the process of downgrading the water pump speed in the heat pump unit from speed N to speed M, the energy efficiency value corresponding to the heat pump unit at each speed includes: S11, when the water pump is in the Nth gear and the water flow protection switch is not turned on, obtain the Nth energy efficiency value of the heat pump unit; S12, reduce the speed of the water pump by one level, and determine whether the water flow protection switch is turned on; S13, when the water flow protection switch is not turned on, obtain the N-1th energy efficiency value of the heat pump unit; S14, when the water flow protection switch is turned on, stop acquiring the energy efficiency value of the heat pump unit; S15, reduce N-1 sequentially to M, and execute steps S12 to S14 once for each reduction of 1, until the Mth energy efficiency value of the heat pump unit is obtained.

3. The method according to claim 2, characterized in that, Obtaining the energy efficiency value of the heat pump unit includes: Obtain the heating energy and power of the current heat pump unit; The ratio of the heating energy to the power is determined as the energy efficiency value.

4. The method according to claim 1, characterized in that, The method includes: When the heat pump unit switches from energy-saving mode to silent mode, the pump speed is sequentially reduced until the speed before the water flow protection switch is activated, and the speed before the water flow protection switch is set as the operating speed of the heat pump unit; or, When the heat pump unit switches from energy-saving operation mode to silent mode, and the water flow protection switch remains closed while the water pump speed is sequentially reduced to the lowest speed, the lowest speed is determined as the water pump operating speed of the heat pump unit.

5. A control device for the water pump speed in a heat pump unit, characterized in that, include: The first processing module is used to, when the energy-saving mode of the heat pump unit is activated, obtain the energy efficiency value corresponding to each gear of the heat pump unit as the pump speed in the heat pump unit decreases from gear N to gear M. Here, gear N is the current gear of the pump; the next gear after gear M is the gear at which the water flow protection switch is activated, or gear M is the lowest gear of the pump; N and M are both positive integers, and N is greater than M; the energy efficiency value is a ratio representing the current heating energy of the heat pump unit to the power of the unit. The determination module is used to determine the maximum energy efficiency value from all the acquired energy efficiency values; The control module is used to control the water pump to be at the same speed as the speed corresponding to the maximum energy efficiency value. The fourth processing module is used to, when the heat pump unit switches from energy-saving mode to normal mode, sequentially reduce the set temperature of the heat pump unit from the first temperature value, and in each temperature reduction process, sequentially reduce the water pump speed from the highest level to the lowest level or the level before the water flow protection is activated, and obtain the energy efficiency value of the heat pump unit at each water pump speed adjustment in each temperature reduction process until the temperature drops to the second temperature value, wherein the first temperature value is the maximum temperature value within the preset temperature range, and the second temperature value is the minimum temperature value within the preset temperature range; The fifth processing module is used to determine the maximum energy efficiency value from the obtained energy efficiency value, and to determine the temperature value corresponding to the maximum energy efficiency value as the set temperature of the current heat pump unit, and to determine the operating level of the current water pump based on the water pump level corresponding to the maximum energy efficiency value. If there are multiple maximum energy efficiency values, the lowest speed is determined from the water pump speeds corresponding to the multiple maximum energy efficiency values.

6. The apparatus according to claim 5, characterized in that, The first processing module is used to perform the following steps: S11, when the water pump is in the Nth gear and the water flow protection switch is not turned on, obtain the Nth energy efficiency value of the heat pump unit; S12, reduce the speed of the water pump by one level, and determine whether the water flow protection switch is turned on; S13, when the water flow protection switch is not turned on, obtain the N-1th energy efficiency value of the heat pump unit; S14, when the water flow protection switch is turned on, stop acquiring the energy efficiency value of the heat pump unit; S15, reduce N-1 sequentially to M, and execute steps S12 to S14 once for each reduction of 1, until the Mth energy efficiency value of the heat pump unit is obtained.

7. A heat pump unit, the heat pump unit comprising electronic equipment, said electronic equipment including: At least one communication interface; At least one bus connected to the at least one communication interface; At least one processor connected to the at least one bus; At least one memory connected to the at least one bus, wherein the processor is configured to execute the method for controlling the pump speed in a heat pump unit according to any one of claims 1 to 4.

8. A computer storage medium storing computer-executable instructions, said computer-executable instructions being used to execute the method for controlling the water pump speed in a heat pump unit according to any one of claims 1 to 4.

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