Control method and device for water pump gears in heat pump unit and heat pump unit

Abstract

The invention relates to a control method and device for water pump gears in a heat pump unit and the heat pump unit, and the method comprises the steps that under the condition that an energy-saving mode of the heat pump unit is started, the energy efficiency value corresponding to the heat pump unit under each gear in the process that the gear of a water pump in the heat pump unit is downshifted from the Nth gear to the Mth gear is obtained, wherein the Nth gear is the current gear of the water pump; the next gear of the Mth gear is a gear for turning on a water flow protection switch, or the Mth gear is the lowest gear of the water pump; n and M are positive integers, and N is greater than M; determining the maximum energy efficiency value from all the obtained energy efficiency values; and controlling the gear of the water pump to be consistent with the gear corresponding to the maximum energy efficiency value. By means of the air source heat pump control method and device, the problem that when an air source heat pump unit operates, a water pump always keeps the highest gear, and consequently a large amount of power is consumed is solved.

Description

Technical Field

[0001] The present application relates to the field of water pump control in a heat pump unit, and in particular to a method and device for controlling a water pump gear position in a heat pump unit, and a heat pump unit. Background Art

[0002] The current air source heat pump unit, regardless of how the external load changes or what the user requires, always maintains the highest gear of the water pump, which will cause it to operate at the highest gear when such a large water flow is not needed, using excessive energy to promote the flow of the medium, resulting in a large amount of power consumption and expensive operating costs. There is currently no effective solution to the above problems in the relevant technology. Summary of the invention

[0003] The present application provides a method and device for controlling the gear position of a water pump in a heat pump unit, and a heat pump unit, so as to solve the problem in the related art that when the air source heat pump unit is running, the water pump always maintains the highest gear position, resulting in a large amount of electricity consumption.

[0004] In a first aspect, the present application provides a method for controlling the gear of a water pump in a heat pump unit, comprising: when the energy-saving mode of the heat pump unit is started, obtaining the energy efficiency value corresponding to the heat pump unit at each gear in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear, wherein the Nth gear is the current gear of the water pump; the next gear of the Mth gear is the gear for turning on the water flow protection switch, or the Mth gear is the lowest gear 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 the energy efficiency values ​​obtained; and controlling the gear of the water pump to be consistent with the gear corresponding to the maximum energy efficiency value.

[0005] Optionally, in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear, the energy efficiency value corresponding to the heat pump unit at each gear includes: S11, when the water pump is in the Nth gear and the water flow protection switch is not turned on, obtaining the Nth energy efficiency value of the heat pump unit; S12, reducing the gear of the water pump by one gear, 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-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, reducing N-1 to M in sequence, and executing steps S12 to S14 once for each reduction by 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 is switched from the energy-saving mode to the silent mode, the gear of the water pump is successively reduced until the gear before the water flow protection is turned on, and the gear before the water flow protection switch is turned on is determined as the water pump operating gear of the heat pump unit; or, when the heat pump unit is switched from the energy-saving operation mode to the silent mode, during the process of reducing the gear of the water pump to the lowest gear in sequence, the water flow protection switch has not been turned on, then the lowest gear is determined as the water pump operating gear of the heat pump unit.

[0008] Optionally, the method also includes: when the heat pump unit switches from the energy-saving mode to the normal mode, the set temperature of the heat pump unit is sequentially reduced from the first temperature value, and during each temperature value reduction process, the gear of the water pump is sequentially reduced from the highest gear to the lowest gear or the gear before the water flow protection is turned on, and the energy efficiency value of the heat pump unit is obtained each time the water pump gear is adjusted during each temperature reduction process until the temperature is reduced 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; the maximum energy efficiency value is determined from the obtained energy efficiency values, 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 gear corresponding to the maximum energy efficiency value is determined as the operating gear of the current water pump.

[0009] Optionally, the set temperature of the heat pump unit is successively reduced from the first temperature value, and the gear of the water pump is successively reduced from the highest gear to the lowest gear or the gear before the water flow protection is turned on during each temperature reduction process, and the energy efficiency value of the heat pump unit is obtained each time the water pump gear is adjusted during each temperature reduction process until the temperature is reduced to the second temperature value, including: S21, setting the set temperature of the heat pump unit to the first temperature value; S22, reducing the gear of the water pump from the highest gear to the lowest gear or the gear before the water flow protection is turned on, and the energy efficiency value of the heat pump unit is obtained each time the water pump gear is adjusted during each temperature reduction process until the temperature is reduced to the second temperature value. S23, execute S21 and S22 once each time the temperature value is reduced by one degree until the temperature is reduced to the second temperature value.

[0010] In the second aspect, the present application provides a control device for the gear of a water pump in a heat pump unit, comprising: a first processing module, used to obtain the energy efficiency value corresponding to the heat pump unit at each gear in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear when the energy-saving mode of the heat pump unit is started, wherein the Nth gear is the current gear of the water pump; the next gear of the Mth gear is the gear for turning on the water flow protection switch, or the Mth gear is the lowest gear of the water pump; N and M are both positive integers, and N is greater than M; a determination module, used to determine the maximum energy efficiency value from all acquired energy efficiency values; a control module, used to control the gear of the water pump to be consistent with the gear 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 in the Nth gear and the water flow protection switch is not turned on, obtaining the Nth energy efficiency value of the heat pump unit; S12, reducing the gear of the water pump by one gear 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-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, reducing N-1 to M in sequence, and executing steps S12 to S14 once for each reduction by 1 until the Mth energy efficiency value of the heat pump unit is obtained.

[0012] In a third aspect, the present application provides a heat pump unit, comprising: 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 method for controlling the water pump gear in the heat pump unit described in the first aspect of the present application.

[0013] In a fourth aspect, the present application further provides a computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the method for controlling the water pump gear position in the heat pump unit described in the first aspect of the present application.

[0014] The above technical solution provided by the embodiment of the present application has the following advantages over the prior art: In the embodiment of the present application, the current gear of the water pump in the heat pump unit can be lowered in sequence to find the water pump gear corresponding to the highest energy efficiency value when the water flow protection switch is not turned on, and the gear of the water pump in the heat pump unit is controlled based on the gear found. It can be seen that in the embodiment of the present application, the gear of the water pump is lowered by comparing the energy efficiency value. When the basic requirements (the water flow protection switch is not turned on) are met, the gear of the water pump in the heat pump unit can be controlled with the gear corresponding to the highest energy efficiency value, that is, while saving electricity consumption, the normal operation of the heat pump unit can also be guaranteed, which solves the problem in the related art that when the air source heat pump unit is running, the water pump always maintains the highest gear, resulting in a large amount of electricity consumption. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 A flow chart of a method for controlling a water pump gear position in a heat pump unit provided in an embodiment of the present application;

[0019] Figure 2 One of the optional flow charts of a method for controlling a water pump gear position in a heat pump unit provided in an embodiment of the present application;

[0020] Figure 3 A second optional flow chart of a method for controlling a water pump gear position in a heat pump unit provided in an embodiment of the present application;

[0021] Figure 4 A flow chart of a method for intelligently adjusting a water pump gear position according to energy efficiency provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of the structure of the control of the water pump gear position in the heat pump unit provided in the embodiment of the present application;

[0023] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] In order to solve the problem in the related art that when the air source heat pump unit is running, the water pump always maintains the highest gear position, resulting in a large amount of power consumption, the present application provides a method for controlling the gear position of the water pump in the heat pump unit, such as Figure 1 As shown, the steps of the method include:

[0027] Step 101, when the energy-saving mode of the heat pump unit is started, the energy efficiency value corresponding to each gear of the heat pump unit in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear is obtained, wherein the Nth gear is the current gear of the water pump; the next gear of the Mth gear is the gear for turning on the water flow protection switch, or the Mth gear is the lowest gear of the water pump; N and M are both positive integers, and N is greater than M;

[0028] The heat pump unit in the embodiment of the present application can be an air source heat pump unit in a specific example. In addition, the water pump of the heat pump unit in the embodiment of the present application has multiple gears, such as the water pump gear has six gears, wherein the sixth gear is the highest gear of the water pump, and the first gear is the lowest gear of the water pump. Based on this, if the current value of N is 6, the gear of the water pump in the heat pump unit is the sixth gear, and the value of M needs to be determined according to actual needs. If the gear is always reduced to the lowest gear, that is, the first gear, and the water flow protection switch is not turned on at this time, then the value of M is 1, that is, the first gear. If the gear of the water pump is reduced to the second gear, the water flow protection switch is turned on, then the value of M is 3, that is, the third gear.

[0029] In addition, if the water flow rate of the heat pump unit in the embodiment of the present application is too low, the plate changer will be damaged when the water path is short of water, thereby affecting the safe operation of the unit. In order to avoid this situation, the unit will cut off the operation, that is, turn on the water flow protection switch. That is, the water flow protection switch in the embodiment of the present application is used to protect the heat pump unit under special circumstances.

[0030] Step 102, determining a maximum energy efficiency value from all acquired energy efficiency values;

[0031] In the embodiment of the present application, the energy efficiency value is the ratio of the current heating energy of the heat pump unit to the power of the unit. The higher the ratio, the higher the heating efficiency of the current unit. If the current energy efficiency value is high, and the gear of the water pump is low and the water flow protection switch is not turned on, it means that the current cost performance of the power consumption of the heat pump unit is also high.

[0032] Step 103, controlling the gear position of the water pump to be consistent with the gear position corresponding to the maximum energy efficiency value.

[0033] Through the above steps 101 to 103, in the embodiment of the present application, the current gear of the water pump in the heat pump unit can be lowered in sequence to find the water pump gear corresponding to the highest energy efficiency value when the water flow protection switch is not turned on, and the gear of the water pump in the heat pump unit is controlled based on the gear found. It can be seen that in the embodiment of the present application, the water pump gear is lowered by comparing the energy efficiency value. Under the condition of meeting the basic requirements (the water flow protection switch is not turned on), the gear of the water pump in the heat pump unit can be controlled with the gear corresponding to the highest energy efficiency value, that is, while saving electricity consumption, it can also ensure the normal operation of the heat pump unit, solving the problem in the related art that when the air source heat pump unit is running, the water pump always maintains the highest gear, resulting in a large amount of electricity consumption.

[0034] In the embodiment of the present application, during the downshifting of the water pump gear, each downshift will compare the energy efficiency values ​​before and after the downshift to determine which of the two current gears has a higher energy efficiency value, and then continue to downshift to determine the final highest energy efficiency value until the water flow protection switch is turned on or the water pump is downgraded to the lowest gear. Based on this, the method of obtaining the energy efficiency value corresponding to the heat pump unit at each gear in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear involved in step 101 in the embodiment of the present application can further include:

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

[0036] S12, lowering the gear of the water pump by one gear, and determining whether the water flow protection switch is turned on;

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

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

[0039] S15, reduce N-1 to M in sequence, and execute steps S12 to S14 once every time N is reduced by 1, until the Mth energy efficiency value of the heat pump unit is obtained.

[0040] For the above steps 11 to S15, in a specific example, taking the value of N as 6, the corresponding energy efficiency value is obtained when the water pump is in the sixth gear, and then the water pump is downshifted to determine whether the current water flow protection switch is turned on when the water pump is in the fifth gear. If it is turned on, the sixth gear is directly the most energy-saving gear at present. If the water flow protection is not turned on, it is necessary to compare the energy efficiency value of the heat pump unit when the water pump is in the sixth gear with the water pump in the fifth gear to determine the energy efficiency value with a higher energy efficiency value. Then continue to downshift and repeat the above process until the current water pump gear is the lowest gear, or before the water flow protection is turned on. The corresponding energy efficiency value is determined for each downshift, so as to determine the highest energy efficiency value, that is, the water pump gear corresponding to the highest energy efficiency value is the most energy-saving gear at present.

[0041] In the embodiment of the present application, the user can adjust the corresponding mode according to actual needs. The above is that the user's demand 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 usually sets a preset temperature range to represent the currently required temperature, and the heat pump unit can be set for each temperature value within the preset temperature range, and then determine the energy efficiency value of the heat pump unit corresponding to different water pump gears at each temperature value, and find the temperature value and gear with the highest energy efficiency value. That is, this method can meet user needs while further saving electricity. Based on this, if Figure 2 As shown, the method of the embodiment of the present application may also include:

[0042] Step 201, when the heat pump unit is switched from the energy-saving mode to the normal mode, the set temperature of the heat pump unit is sequentially reduced from the first temperature value, and the gear of the water pump is sequentially reduced from the highest gear to the lowest gear or the gear before the water flow protection is turned on during each temperature reduction process, and the energy efficiency value of the heat pump unit is obtained each time the water pump gear is adjusted during each temperature reduction process until the temperature is reduced 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;

[0043] Step 202, determine the maximum energy efficiency value from the acquired energy efficiency values, determine the temperature value corresponding to the maximum energy efficiency value as the set temperature of the current heat pump unit, and determine the water pump gear corresponding to the maximum energy efficiency value as the operating gear of the current water pump.

[0044] In this regard, in a specific example, the gear of the water pump in the heat pump unit is from the sixth gear to the first gear, the sixth gear is the highest gear, the first gear is the lowest gear, and the current preset range is 25°C to 29°C, that is, the first temperature value is 29°C. Therefore, when the set temperature of the heat pump unit is 29°C, the gear of the water pump is adjusted from the highest gear to the lowest gear in sequence, or adjusted to the gear before the water flow protection switch is turned on, and the energy efficiency value of the corresponding heat pump unit is obtained each time the gear is adjusted. Then set the set temperature to 28°C, and then perform similar operations as 29°C, and determine the energy efficiency values ​​of different water pump gears at the current temperature, and so on for 27°C to 25°C, until all energy efficiency values ​​corresponding to different gears for each temperature value are determined, and then the highest energy efficiency value is selected from the determined energy efficiency values. The temperature and water pump gear corresponding to the highest energy efficiency value are the current set temperature that needs to be set and the actual gear of the water pump at the current temperature. It should be noted that if there are multiple highest energy efficiency values, the lowest gear is determined from the water pump gears corresponding to the multiple highest energy efficiency values. This method can meet the user's temperature requirements while further saving power consumption.

[0045] For the above step 201, the setting temperature of the heat pump unit is sequentially reduced from the first temperature value, and the gear of the water pump is sequentially reduced from the highest gear to the lowest gear or the gear before the water flow protection is turned on during each temperature reduction process, and the energy efficiency value of the heat pump unit is obtained each time the water pump gear is adjusted during each temperature reduction process until the temperature is reduced to the second temperature value. The method may further include:

[0046] S21, setting the set temperature of the heat pump unit to a first temperature value;

[0047] S22, lowering the gear of the water pump from the highest gear to the lowest gear or the gear before the water flow protection is turned on, and calculating the energy efficiency value of the heat pump unit each time the gear of the water pump is adjusted;

[0048] S23, each time the temperature value is reduced by one degree, S21 and S22 are executed once until the temperature is reduced to the second temperature value.

[0049] It can be seen that in the embodiment of the present application, for each temperature value in the preset temperature range, the water pump gear will be adjusted from the highest to the lowest or to the gear before the water flow protection switch is turned on, so as to determine the highest energy efficiency value, which can further save energy consumption while meeting user needs.

[0050] In the embodiment of the present application, the user can adjust the corresponding mode according to actual needs. The above is that the user's demand 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 priority is the noise of the current heat pump unit, so it is only necessary to reduce the water pump gear to the lowest gear or before the water flow protection switch is turned on. Based on this, if Figure 3 As shown, the method steps of the embodiment of the present application also include:

[0051] Step 301, when the heat pump unit is switched from the energy-saving mode to the silent mode, the gear of the water pump is successively reduced until the gear before the water flow protection switch is turned on, and the gear before the water flow protection switch is turned on is determined as the water pump operation gear of the heat pump unit; or,

[0052] Step 302, when the heat pump unit switches from the energy-saving operation mode to the silent mode, in the process of successively reducing the gear of the water pump to the lowest gear, if the water flow protection switch has not been turned on, the lowest gear is determined as the water pump operation gear of the heat pump unit.

[0053] In this regard, in a specific example, if the current water pump gear is the sixth gear, downshift in sequence. If the water flow protection switch is turned on in the second gear, the third gear is set as the running gear of the water pump. If the water flow protection switch is not turned on after downshifting to the first gear, the first gear is set as the running gear of the water pump. It can be seen that in silent mode, it is only necessary to lower the gear to the lowest gear or the gear before the water flow protection switch is turned on. In this way, in silent mode, power consumption can also be reduced to a certain extent.

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

[0055] Step 31, obtaining the heating energy of the current heat pump unit and the 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 is explained below in conjunction with a specific implementation of an embodiment of the present application. The specific implementation provides a method for intelligently adjusting the gear position of a water pump according to energy efficiency, such as Figure 4 As shown, the steps of the method include:

[0058] Step 401, determining user needs;

[0059] Step 402, the user demand is energy saving;

[0060] Step 403: the user needs to mute the sound;

[0061] Step 404, when the user demand is energy saving, the unit detects the capacity Qn and power Pn of the current water pump gear n, and calculates the energy efficiency COPn=Qn / Pn;

[0062] Step 405, downgrade one gear based on the current gear position n;

[0063] Step 406, determine whether the water pump turns on the water flow switch protection; if yes, execute step 415, if not, execute step 407;

[0064] Step 407, continue to detect the capacity Qm and power Pm of the water pump gear m, and calculate COPm=Qm / Pm

[0065] Step 408, do not report the water flow protection switch, and judge and compare COPn and COPm;

[0066] Step 409, if COPn is large, determine whether the current water pump gear position m is lower than gear 1; if it is lower than gear 1, execute step 409; if it is higher than gear 1, execute step 405;

[0067] Step 410, if the COPm is large, compare all COPms and take the maximum value;

[0068] Step 411, when the user needs to mute, determine whether the current gear is lower than the 1st gear; if yes, execute step 415, if not, execute step 412;

[0069] Step 412, whether the water pump turns on the water flow protection switch, if not, go to step 413, if yes, go to step 414;

[0070] Step 413, the current gear is reduced by one and the process returns to step 411;

[0071] Step 414, increase the current gear by one and execute step 415;

[0072] Step 415, determine the most energy-efficient gear.

[0073] Through the above steps, it can be seen that when the user's requirement for air source heat pump hot water is energy saving, the unit detects the capacity Qn and power Pn of the current water pump gear n, and calculates the energy efficiency COPn = Qn / Pn. Based on the current gear n, it is reduced by one gear: gear m, and it is determined whether the water pump reports the water flow switch protection. If the water flow protection switch is not reported, the capacity Qm and power Pm of the water pump gear m are continued to be detected, and COPm = Qm / Pm is calculated. If the water flow protection switch is reported, it is determined that the gear with the highest energy efficiency is gear n, and the water pump gear n is the most energy-saving gear of the unit. If the water flow protection switch is not reported, it is determined and compared with COPn and COPm. If COPn is larger, it is determined whether the current water pump gear m is lower than gear 1. If it is higher than gear 1, it returns to step (3); if it is not higher than gear 1, it is determined that the gear with the highest energy efficiency is gear n, and the water pump gear n is the most energy-saving gear of the unit. If the COPm is large, compare all COPms and take the maximum value until the gear corresponding to the required energy efficiency is determined. It is determined that the gear with the highest energy efficiency is gear m, and the water pump gear m is the most energy-saving gear of the unit.

[0074] When the user requires the air source heat pump to be silent when making hot water, first determine whether the current water pump gear is lower than gear 1. If it is higher than gear 1, determine whether the current water pump gear reports the water flow protection switch. If it does not report the water flow protection switch, the current water pump gear is reduced by one gear until the water flow protection switch is reported. If the water flow protection switch is reported, the gear corresponding to the required energy efficiency is determined, and the gear with the highest energy efficiency is determined to be the current gear, and the current water pump gear is the most energy-saving gear of the unit; if it is not higher than gear 1, determine that the gear with the highest energy efficiency is the current gear, and the current water pump gear is the most energy-saving gear of the unit.

[0075] It can be seen that in the embodiment of the present application, under the premise of not affecting the operation of the unit, the water pump level is intelligently adjusted according to the different functional requirements and experiences of the user, so that the unit can provide the user with the desired experience in addition to meeting the normal cooling and heating requirements, and the unit can operate according to the most energy-saving water pump gear to reduce the operating cost. At the same time, it can prevent serious consequences such as water flow switch protection and unit shutdown.

[0076] Corresponding to the above Figure 1 The present application also provides a device for controlling the water pump gear position in a heat pump unit, such as Figure 5 As shown, the device comprises:

[0077] The first processing module 502 is used to obtain the energy efficiency value corresponding to each gear of the heat pump unit in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear when the energy-saving mode of the heat pump unit is started, wherein the Nth gear is the current gear of the water pump; the next gear of the Mth gear is the gear for turning on the water flow protection switch, or the Mth gear is the lowest gear of the water pump; N and M are both positive integers, and N is greater than M;

[0078] A determination module 504, configured to determine a maximum energy efficiency value from all acquired energy efficiency values;

[0079] The control module 506 is used to control the gear position of the water pump to be consistent with the gear position corresponding to the maximum energy efficiency value.

[0080] Through the device of the embodiment of the present application, the current gear of the water pump in the heat pump unit can be lowered in sequence to find the water pump gear corresponding to the highest energy efficiency value when the water flow protection switch is not turned on, and the gear of the water pump in the heat pump unit is controlled based on the gear found. It can be seen that in the embodiment of the present application, the water pump gear is lowered by comparing the energy efficiency value. When the basic requirements (the water flow protection switch is not turned on) are met, the gear of the water pump in the heat pump unit can be controlled with the gear corresponding to the highest energy efficiency value, that is, while saving electricity consumption, it can also ensure the normal operation of the heat pump unit, solving the problem in the related art that when the air source heat pump unit is running, the water pump always maintains the highest gear, resulting in a large amount of electricity consumption.

[0081] In an optional implementation manner of the embodiment of the present application, the first processing module in the embodiment of the present application 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, obtaining the Nth energy efficiency value of the heat pump unit;

[0083] S12, lowering the gear of the water pump by one gear, and determining whether the water flow protection switch is turned on;

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

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

[0086] S15, reduce N-1 to M in sequence, and execute steps S12 to S14 once every time N is reduced by 1, until the Mth energy efficiency value of the heat pump unit is obtained.

[0087] In an optional implementation of an embodiment of the present application, the first processing module in the embodiment of the present application is also used to obtain the energy efficiency value of the heat pump unit in the following manner: obtain the heating energy of the current heat pump unit, and the power of the current heat pump unit; determine the ratio of the heating energy to the power as the energy efficiency value.

[0088] In an optional implementation manner of the embodiment of the present application, the device in the embodiment of the present application also includes: a second processing module, which is used to reduce the gear of the water pump in sequence when the heat pump unit is switched from the energy-saving mode to the silent mode, until the gear before the water flow protection is turned on, and the gear before the water flow protection switch is turned on is determined as the water pump operating gear of the heat pump unit; or, a third processing module, which is used to reduce the gear of the water pump in sequence to the lowest gear when the heat pump unit is switched from the energy-saving operation mode to the silent mode, and if the water flow protection switch has not been turned on, the lowest gear is determined as the water pump operating gear of the heat pump unit.

[0089] In an optional implementation manner of the embodiment of the present application, the device in the embodiment of the present application also includes: a fourth processing module, which is used to reduce the set temperature of the heat pump unit from the first temperature value in sequence when the heat pump unit switches from the energy-saving mode to the normal mode, and reduce the gear of the water pump from the highest gear to the lowest gear or the gear before the water flow protection is turned on in sequence during each temperature value reduction, and obtain the energy efficiency value of the heat pump unit when the water pump gear is adjusted each time during each temperature reduction process until the temperature is reduced 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; a fifth processing module, which is used to determine the maximum energy efficiency value from the acquired energy efficiency values, 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 water pump gear corresponding to the maximum energy efficiency value as the operating gear of the current water pump.

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

[0091] S21, setting the set temperature of the heat pump unit to a first temperature value;

[0092] S22, lowering the gear of the water pump from the highest gear to the lowest gear or the gear before the water flow protection is turned on, and calculating the energy efficiency value of the heat pump unit each time the gear of the water pump is adjusted;

[0093] S23, each time the temperature value is reduced by one degree, S21 and S22 are executed once until the temperature is reduced to the second temperature value.

[0094] like Figure 6 As shown, an embodiment of the present 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, used for storing computer programs;

[0096] In one embodiment of the present application, the processor 611 is used to execute the program stored in the memory 613 to implement the method for controlling the water pump gear in the heat pump unit provided by any of the aforementioned method embodiments, and its role is similar and will not be repeated here.

[0097] It should be noted that the electronic device in the embodiment of the present application is built into the heat pump unit to achieve intelligent control of the water pump.

[0098] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for controlling the water pump gear position in a heat pump unit provided in any of the aforementioned method embodiments are implemented.

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

[0100] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0101] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0102] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for controlling the gear position of a water pump in a heat pump unit, characterized in that: include: When the energy-saving mode of the heat pump unit is started, the energy efficiency value corresponding to the heat pump unit at each gear is obtained in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear, wherein the Nth gear is the current gear of the water pump; the next gear of the Mth gear is the gear for turning on the water flow protection switch, or the Mth gear is the lowest gear of the water pump; N and M are both positive integers, and N is greater than M; Determine the maximum energy efficiency value from all the energy efficiency values ​​obtained; The gear position of the water pump is controlled to be consistent with the gear position corresponding to the maximum energy efficiency value.

2. The method according to claim 1, characterized in that In the process of obtaining the gear of the water pump in the heat pump unit downshifting from the Nth gear to the Mth gear, the energy efficiency value corresponding to the heat pump unit at each gear includes: S11, when the water pump is in the Nth gear position and the water flow protection switch is not turned on, obtaining the Nth energy efficiency value of the heat pump unit; S12, lowering the gear of the water pump by one gear, 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-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, reduce N-1 to M in sequence, and execute steps S12 to S14 once every time N is reduced by 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, including: Obtaining the current heating energy of the heat pump unit and the current power of the 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 comprises: When the heat pump unit is switched from the energy-saving mode to the silent mode, the gear of the water pump is successively reduced until the gear before the water flow protection switch is turned on, and the gear before the water flow protection switch is turned on is determined as the water pump operating gear of the heat pump unit; or When the heat pump unit switches from the energy-saving operation mode to the silent mode, the water pump gear is successively reduced to the lowest gear, and the water flow protection switch has not been turned on, then the lowest gear is determined as the water pump operation gear of the heat pump unit.

5. The method according to claim 1, characterized in that The method further comprises: When the heat pump unit is switched from the energy-saving mode to the normal mode, the set temperature of the heat pump unit is sequentially reduced from the first temperature value, and the gear of the water pump is sequentially reduced from the highest gear to the lowest gear or the gear before the water flow protection is turned on during each temperature reduction process, and the energy efficiency value of the heat pump unit is obtained each time the water pump gear is adjusted during each temperature reduction process until the temperature is reduced 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 maximum energy efficiency value is determined from the acquired energy efficiency values, 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 gear corresponding to the maximum energy efficiency value is determined as the operating gear of the current water pump.

6. The method according to claim 5, characterized in that The set temperature of the heat pump unit is sequentially reduced from the first temperature value, and the gear of the water pump is sequentially reduced from the highest gear to the lowest gear or the gear before the water flow protection is turned on during each temperature reduction process, and the energy efficiency value of the heat pump unit is obtained each time the water pump gear is adjusted during each temperature reduction process until the temperature is reduced to the second temperature value, including: S21, setting the set temperature of the heat pump unit to a first temperature value; S22, lowering the gear of the water pump from the highest gear to the lowest gear or the gear before the water flow protection is turned on, and calculating the energy efficiency value of the heat pump unit each time the gear of the water pump is adjusted; S23, each time the temperature value is reduced by one degree, S21 and S22 are executed once until the temperature is reduced to the second temperature value.

7. A water pump gear control device in a heat pump unit, characterized in that: include: The first processing module is used for obtaining, when the energy-saving mode of the heat pump unit is started, the energy efficiency value corresponding to the heat pump unit at each gear in the process of downshifting the gear of the water pump in the heat pump unit from the Nth gear to the Mth gear, wherein the Nth gear is the current gear of the water pump; the next gear of the Mth gear is the gear for turning on the water flow protection switch, or the Mth gear is the lowest gear of the water pump; N and M are both positive integers, and N is greater than M; A determination module, used for determining a maximum energy efficiency value from all acquired energy efficiency values; A control module is used to control the gear position of the water pump to be consistent with the gear position corresponding to the maximum energy efficiency value.

8. The device according to claim 7, characterized in that The first processing module is used to perform the following steps: S11, when the water pump is in the Nth gear position and the water flow protection switch is not turned on, obtaining the Nth energy efficiency value of the heat pump unit; S12, lowering the gear of the water pump by one gear, 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-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, reduce N-1 to M in sequence, and execute steps S12 to S14 once every time N is reduced by 1, until the Mth energy efficiency value of the heat pump unit is obtained.

9. A heat pump unit, the heat pump unit comprising electronic equipment, the electronic equipment comprising: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor coupled 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 water pump gear position in the heat pump unit according to any one of claims 1 to 6.

10. A computer storage medium storing computer executable instructions, wherein the computer executable instructions are used to execute the method for controlling the gear position of a water pump in a heat pump unit according to any one of claims 1 to 6.

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