Air source heat pump unit control method and device, storage medium and electronic equipment

Abstract

The application discloses an air source heat pump unit control method and device, a storage medium and electronic equipment, relates to the technical field of heat pumps, and comprises the following steps: adjusting the main valve opening degree of a main line expansion valve according to a preset main valve reliable condition met by an integral machine current value, a heat exchange temperature difference value and an exhaust temperature value; after the main valve opening degree is adjusted, adjusting the air supplementing expansion valve opening degree and an air supplementing valve opening degree limit range of an air supplementing expansion valve according to a preset air supplementing valve reliable condition met by an exhaust superheat value; and optimizing and adjusting the air supplementing valve opening degree in the air supplementing valve opening degree limit range with the maximum target unit performance as an optimization target. The application can effectively realize the global balance of the unit performance and reliability of the air source heat pump unit.

Description

Technical Field

[0001] This application relates to the field of heat pump technology, specifically to a control method, device, storage medium, and electronic equipment for an air source heat pump unit. Background Technology

[0002] In air-source heat pump units with a single-unit, two-stage air supply structure, an economizer is provided to improve the performance of the air-source heat pump unit under conditions such as low-temperature heating. However, current related technologies typically employ relatively rigid air supply adjustment methods based on a single temperature parameter. Under wide temperature ranges and variable load conditions, insufficient or excessive air supply can easily occur, failing to achieve a global balance between unit performance and reliability. Summary of the Invention

[0003] This application provides a control scheme for an air source heat pump unit, which effectively achieves a global balance between the unit performance and reliability of an air source heat pump unit with a single-unit two-stage air replenishment structure by dynamically and reliably adjusting the replenishment air volume.

[0004] The embodiments of this application provide the following technical solutions: According to one embodiment of this application, a control method for an air source heat pump unit includes: adjusting the main valve opening of the main expansion valve based on preset main valve reliability conditions satisfied by the overall unit current value, heat exchange temperature difference value, and exhaust temperature value; after the main valve opening is adjusted, adjusting the make-up valve opening and make-up valve opening limit range of the make-up expansion valve based on preset make-up valve reliability conditions satisfied by the exhaust superheat value; and optimizing the make-up valve opening within the make-up valve opening limit range with maximizing the target unit performance as the optimization objective.

[0005] In some embodiments of this application, adjusting the opening degree and opening limit range of the gas supply expansion valve according to the preset gas supply valve reliability conditions satisfied by the exhaust superheat value includes: when the exhaust superheat value is greater than a preset first superheat value, increasing the opening degree of the gas supply valve by a third degree and raising the lower limit of the opening limit range of the gas supply valve; when the exhaust superheat value is less than a preset second superheat value, decreasing the opening degree of the gas supply valve by a fourth degree and lowering the upper limit of the opening limit range of the gas supply valve.

[0006] In some embodiments of this application, adjusting the main valve opening of the main expansion valve according to the preset main valve reliability conditions satisfied by the overall machine current value, heat exchange temperature difference value, and exhaust temperature value includes: increasing the main valve opening by a first degree when the overall machine current value is greater than a preset first current value, or the heat exchange temperature difference value is greater than a preset first temperature difference value, or the exhaust temperature value is greater than a preset first temperature value; and decreasing the main valve opening by a second degree when the overall machine current value is less than a preset second current value or the exhaust temperature value is less than a preset second temperature value.

[0007] In some embodiments of this application, after adjusting the main valve opening of the main expansion valve, the method further includes: when the overall current value is greater than a preset first current value, or the heat exchange temperature difference value is greater than a preset first temperature difference value, or the exhaust temperature value is greater than a preset first temperature value, increasing the lower limit of the main valve opening limit range; and when the overall current value is less than a preset second current value or the exhaust temperature value is less than a preset second temperature value, decreasing the upper limit of the main valve opening limit range.

[0008] In some embodiments of this application, the target unit performance includes: when the temperature difference between the set temperature value and the outlet water temperature value is greater than or equal to a preset temperature difference threshold, the target unit performance is heating performance; when the temperature difference is less than the preset temperature difference threshold, the target unit performance is energy-saving performance.

[0009] In some embodiments of this application, after optimizing the opening of the make-up air valve within the limit range of the make-up air valve opening with the optimization goal of maximizing the performance of the target unit, the method further includes: updating a preset operating parameter table based on the actual operating parameters when the performance of the target unit is maximized, the opening of the main valve and the opening of the make-up air valve, so that when the air source heat pump unit is started up next time, the main expansion valve and the make-up air expansion valve are adjusted to the initial opening according to the preset operating parameter table.

[0010] According to one embodiment of this application, an air source heat pump unit control device includes: a main valve adjustment module, used to: adjust the main valve opening of the main expansion valve according to preset main valve reliability conditions satisfied by the overall unit current value, heat exchange temperature difference value, and exhaust temperature value; a make-up air valve adjustment module, used to: after the main valve opening is adjusted, adjust the make-up air valve opening and the make-up air valve opening limit range according to preset make-up air valve reliability conditions satisfied by the exhaust superheat value; and a performance optimization module, used to: optimize the make-up air valve opening within the make-up air valve opening limit range, with maximizing the target unit performance as the optimization objective.

[0011] In some embodiments of this application, when adjusting the opening degree and opening limit range of the air supply expansion valve according to the preset air supply valve reliability conditions satisfied by the exhaust superheat value, the air supply valve adjustment module is used to: increase the opening degree of the air supply valve by a third degree and raise the lower limit of the opening limit range of the air supply valve when the exhaust superheat value is greater than a preset first superheat value; and decrease the opening degree of the air supply valve by a fourth degree and lower the upper limit of the opening limit range of the air supply valve when the exhaust superheat value is less than a preset second superheat value.

[0012] According to another embodiment of this application, a storage medium stores a computer program thereon, which, when executed by a processor of an electronic device, causes the electronic device to perform the methods described in the embodiments of this application.

[0013] According to another embodiment of this application, an electronic device may include: a memory storing a computer program; and a processor reading the computer program stored in the memory to execute the methods described in the embodiments of this application.

[0014] According to another embodiment of this application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the methods provided in the various optional implementations described in the embodiments of this application.

[0015] In this embodiment, the main valve opening of the main expansion valve is adjusted according to the preset main valve reliability conditions satisfied by the overall unit current value, heat exchange temperature difference value, and exhaust temperature value. After the main valve opening is adjusted, the replenishment valve opening and the replenishment valve opening limit range are adjusted according to the preset replenishment valve reliability conditions satisfied by the exhaust superheat value. Within the replenishment valve opening limit range, the replenishment valve opening is optimized and adjusted with the goal of maximizing the performance of the target unit.

[0016] In this embodiment of the application, the main valve opening of the main expansion valve is adjusted according to the overall unit current value, heat exchange temperature difference value, and exhaust temperature value to ensure reliable main valve opening. Based on the reliable main valve opening, the opening of the make-up air expansion valve and its opening limit range are further adjusted according to the exhaust superheat value to ensure reliable make-up air valve opening and obtain a reliable make-up air valve opening limit range. Furthermore, within this make-up air valve opening limit range, the opening of the make-up air valve is optimized through performance optimization, ensuring reliable adjustment of the make-up air volume while optimizing the target unit performance. Under wide temperature range and variable load conditions, a global balance between unit performance and reliability can be effectively achieved. Especially under low-temperature heating conditions, a global balance between heating performance / energy saving performance and reliability can be effectively achieved. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The diagram schematically illustrates the system structure of an air source heat pump unit with a single-unit two-stage air replenishment structure according to an embodiment of this application.

[0019] Figure 2 A flowchart of an air source heat pump unit control method according to an embodiment of this application is shown.

[0020] Figure 3 A control flowchart of an air source heat pump unit according to an embodiment of this application is shown in one scenario.

[0021] Figure 4 A block diagram of an air source heat pump unit control device according to an embodiment of this application is shown.

[0022] Figure 5 A block diagram of an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0023] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments provided herein are merely illustrative of the present disclosure and are not intended to limit the present disclosure. Furthermore, the embodiments provided below are some embodiments for implementing the present disclosure, and not all embodiments for implementing the present disclosure. Unless otherwise specified, the technical solutions described in the embodiments of the present disclosure can be implemented in any combination. It should be noted that, in the embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a method or apparatus that includes a list of elements includes not only the elements expressly described, but also other elements not expressly listed, or elements inherent to implementing the method or apparatus. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other related elements (e.g., steps in the method or units in the apparatus; for example, a unit may be a portion of circuitry, a portion of a processor, a portion of a program or software, etc.) in the method or apparatus that includes that element. For example, the air source heat pump unit control method provided in this disclosure includes a series of steps, but the air source heat pump unit control method provided in this disclosure is not limited to the steps described. Similarly, the air source heat pump unit control device provided in this disclosure includes a series of units, but the device provided in this disclosure is not limited to the units explicitly described, but may also include units that need to be set up to obtain relevant information or to process information. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. It is understood that in the specific implementation of this application, relevant data is involved. When the embodiments in this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0024] In air-source heat pump units with a single-unit, two-stage air supply structure, an economizer is provided to improve the performance of the air-source heat pump unit under conditions such as low-temperature heating. However, current related technologies typically employ relatively rigid air supply adjustment methods based on a single temperature parameter. Under wide temperature ranges and variable load conditions, insufficient or excessive air supply can easily occur, failing to achieve a global balance between unit performance and reliability.

[0025] To address these issues, this application provides a control scheme for air source heat pump units, which can effectively achieve a global balance between the unit performance and reliability of air source heat pump units with a single-unit two-stage air replenishment structure by dynamically and reliably adjusting the replenishment air volume.

[0026] The following is a detailed description of relevant embodiments of the air source heat pump unit control scheme provided in this application.

[0027] Figure 1 This diagram schematically illustrates the system structure of an air-source heat pump unit with a single-unit, two-stage air-fuel injection structure according to an embodiment of this application. The air-source heat pump unit with the single-unit, two-stage air-fuel injection structure may include: an economizer 110 and an air-side heat exchanger 120. The main outlet 111 of the economizer 110 is connected to the air-side heat exchanger 120 via a main connecting pipe 130. A main expansion valve 140 and a subcooling temperature sensor 1170 are also installed on the main connecting pipe 130. Furthermore, the enthalpy-increasing inlet 112 of the economizer 110 is connected to the air-side heat exchanger 120 via an auxiliary connecting pipe 160. An air-fuel injection expansion valve 170 and an enthalpy-increasing inlet temperature sensor 1160 are also installed on the auxiliary connecting pipe 160.

[0028] In addition, the air source heat pump unit may also include a water-side heat exchanger 180, a compressor 190, a four-way valve 1100, and a gas-liquid separator 1110. A high-pressure sensor 1120 and an exhaust temperature sensor 1140 are installed on the connecting pipe between the exhaust end 191 of the compressor 190 and the third end 1103 of the four-way valve 1100. The intake end 192 of the compressor 190 is connected to the gas-liquid separator 1110. An enthalpy-increasing temperature sensor 1150 is installed on the connecting pipe between the enthalpy-increasing end 193 of the compressor 190 and the enthalpy-increasing outlet 114 of the economizer 110. Furthermore, the first end 1101 of the four-way valve 1100 is connected to the gas-liquid separator 1110. The second end 1102 of the four-way valve 1100 is connected to the air-side heat exchanger 120. The fourth end 1104 of the four-way valve 1100 is connected to the water-side heat exchanger 180. An internal bypass temperature sensor 1180 is installed on the connecting pipe between the main outlet 113 of the economizer 110 and the water-side heat exchanger 180.

[0029] Figure 2 A flowchart illustrating an embodiment of an air source heat pump unit control method according to this application is shown. The execution entity of this air source heat pump unit control method can be an electronic device with processing capabilities and / or a server. The electronic device can be the air source heat pump unit itself, a remote control, a wired controller, a mobile phone, a computer, a smartwatch, or other home appliances, etc. The server can be a cloud server or a physical server, etc. The air source heat pump unit can be a unit employing an air source heat pump system, such as a heating unit, modular unit, water heater, multi-split unit, etc.

[0030] For example, in one embodiment of this application, the air source heat pump unit itself can be the executing entity of the air source heat pump unit control method. The air source heat pump unit may include a processor and a memory, and the memory stores a computer program. Thus, the processor in the air source heat pump unit can read the computer program stored in the memory to execute the methods of the various embodiments of this application.

[0031] like Figure 2 As shown, the air source heat pump unit control method may include steps S210 to S230.

[0032] Step S210: Adjust the main valve opening of the main expansion valve according to the preset main valve reliability conditions met by the overall current value, heat exchange temperature difference value and exhaust temperature value. Step S220: After the main valve opening is adjusted, the gas supply valve opening and the gas supply valve opening limit range are adjusted according to the preset gas supply valve reliability conditions that the exhaust superheat value meets. Step S230: Within the limit range of the air supply valve opening, optimize and adjust the air supply valve opening with the goal of maximizing the performance of the target unit.

[0033] After the air source heat pump unit is started (such as in heating mode), you can first look up the actual operating parameters (such as outdoor ambient temperature, outlet water temperature and exhaust superheat) in the preset operating parameter table to determine the initial opening degree corresponding to them. Then adjust the main expansion valve and the make-up air expansion valve to their initial opening degrees, that is, adjust the main expansion valve to its initial main valve opening degree and adjust the make-up air expansion valve to its initial make-up air valve opening degree.

[0034] Then, the main valve opening of the main expansion valve is reliably adjusted from three perspectives: the overall current value, the heat exchange temperature difference value, and the exhaust temperature value. Specifically, the main valve opening is adjusted according to the preset main valve reliability conditions met by the overall current value, the heat exchange temperature difference value, and the exhaust temperature value, so as to effectively ensure the reliability of the main valve opening.

[0035] The total current value can be the total current value of the air source heat pump unit; the heat exchange temperature difference value can be equal to the outdoor ambient temperature value minus the outdoor coil temperature value or the indoor shell temperature value minus the outlet water temperature value. The outdoor coil temperature value can be the temperature value of the coil of the air-side heat exchanger, and the indoor shell temperature can be the temperature value of the shell of the water-side heat exchanger. The exhaust temperature value is the temperature value of the exhaust gas.

[0036] Then, based on the reliable opening of the main valve, the opening of the gas replenishment valve and the opening limit range of the gas replenishment expansion valve are further reliably adjusted from the perspective of the exhaust superheat value. Specifically, the opening of the gas replenishment valve is adjusted according to the preset reliable conditions of the gas replenishment valve met by the exhaust superheat value, which can further effectively ensure the reliability of the gas replenishment valve opening, that is, to achieve the reliability of the gas replenishment volume.

[0037] Furthermore, based on the preset reliability conditions of the make-up air valve met by the exhaust superheat value, the opening limit range of the make-up air expansion valve is adjusted to ensure the reliability of the make-up air valve opening limit range. Within this reliable make-up air valve opening limit range, the opening of the make-up air valve is optimized with the goal of maximizing the performance of the target unit. This further ensures reliable adjustment of the make-up air volume while optimizing the performance of the target unit, effectively achieving a global balance between unit performance and reliability.

[0038] The preset main valve reliability condition is a pre-set condition that adjusts the main valve opening of the main expansion valve based on the overall machine current value, heat exchange temperature difference value, and exhaust temperature value; the preset air replenishment valve reliability condition is a pre-set condition that adjusts the air replenishment valve opening of the air replenishment expansion valve based on the exhaust superheat value. The exhaust superheat value can be equal to the exhaust temperature value minus the outlet water temperature value.

[0039] In summary, using the method described in this embodiment, the main valve opening of the main expansion valve is adjusted based on the overall unit current value, heat exchange temperature difference value, and exhaust temperature value to ensure reliable main valve opening. Based on the reliable main valve opening, the opening of the make-up air expansion valve and its opening limit range are further adjusted based on the exhaust superheat value to ensure reliable make-up air valve opening and obtain a reliable make-up air valve opening limit range. Furthermore, within this make-up air valve opening limit range, the opening of the make-up air valve is optimized through performance optimization, ensuring reliable adjustment of the make-up air volume while optimizing the target unit performance. Under wide temperature range and variable load conditions, a global balance between unit performance and reliability can be effectively achieved. Especially under low-temperature heating conditions, a global balance between heating performance / energy saving performance and reliability can be effectively achieved.

[0040] The following description Figure 1 Further optional specific embodiments are provided for each step performed when controlling an air source heat pump unit under the example.

[0041] In one embodiment, step S210, adjusting the main valve opening of the main expansion valve according to the preset main valve reliability conditions satisfied by the overall current value, heat exchange temperature difference value, and exhaust temperature value, may include: increasing the main valve opening by a first degree when the overall current value is greater than a preset first current value, or the heat exchange temperature difference value is greater than a preset first temperature difference value, or the exhaust temperature value is greater than a preset first temperature value; and decreasing the main valve opening by a second degree when the overall current value is less than a preset second current value or the exhaust temperature value is less than a preset second temperature value.

[0042] In this embodiment, the preset main valve reliability conditions that satisfy the overall current value, heat exchange temperature difference value, and exhaust temperature value include "the first main valve reliability condition of increasing the main valve opening by a first degree" and "the second main valve reliability condition of decreasing the main valve opening by a second degree".

[0043] When the overall current value exceeds the preset first current value A1, or the heat exchange temperature difference exceeds the preset first temperature difference value B1, or the exhaust temperature exceeds the preset first temperature value C1, the first main valve reliability condition is met. At this time, it can be determined from these three perspectives that the air source heat pump unit is in an overload operation state. Therefore, increasing the main valve opening by the first opening M1 can reduce the operating load of the air source heat pump unit, thereby effectively ensuring the reliability of the main valve opening.

[0044] When the overall current value is less than the preset second current value A2 or the exhaust temperature value is less than the preset second temperature value C2, the reliability condition of the second main valve is met. At this time, it can be determined from these two perspectives that the capacity of the air source heat pump unit is not fully utilized. Therefore, reducing the main valve opening by the second opening M2 can improve the operating efficiency of the air source heat pump unit, thereby effectively ensuring the reliability of the main valve opening.

[0045] Optionally, in other embodiments, step S210, adjusting the main valve opening of the main expansion valve according to the preset main valve reliability conditions satisfied by the overall current value, heat exchange temperature difference value, and exhaust temperature value, may include: increasing the main valve opening by a first degree when at least two of the following conditions are met: the overall current value is greater than a preset first current value, the heat exchange temperature difference value is greater than a preset first temperature difference value, and the exhaust temperature value is greater than a preset first temperature value; and decreasing the main valve opening by a second degree when the overall current value is less than a preset second current value and the exhaust temperature value is less than a preset second temperature value.

[0046] The preset first current value A1, preset first temperature difference value B1, and preset first temperature value C1 can be preset threshold values, and this application does not impose any special limitations on them. In addition, in one embodiment, the first opening degree M1 can be a preset unique opening degree used to increase the main valve opening degree, and the second opening degree M2 can be a preset unique opening degree used to decrease the main valve opening degree.

[0047] Furthermore, in one approach, a preset range for the actual operating parameters, the preset range for the overall machine current value, the preset range for the heat exchange temperature difference value, and the preset range for the exhaust temperature value can be determined from a preset first opening adjustment table, along with a preset first sub-opening corresponding to these preset ranges, and this preset first sub-opening is defined as the first opening. Similarly, a preset range for the actual operating parameters, the preset range for the overall machine current value, the preset range for the heat exchange temperature difference value, and the preset range for the exhaust temperature value can be determined from a preset first opening reduction adjustment table, along with a preset second sub-opening corresponding to these preset ranges, and this preset second sub-opening is defined as the second opening.

[0048] The preset first opening adjustment table can preset different preset ranges corresponding to the preset first sub-opening; the preset first opening adjustment table can also preset different preset ranges corresponding to the preset second sub-opening. In this way, the preset first sub-opening can be dynamically determined as the first opening based on actual operating parameters, overall machine current, heat exchange temperature difference, and exhaust temperature, or the preset second sub-opening can be dynamically determined as the second opening, further improving the reliability of the main valve opening.

[0049] Furthermore, after, during, or before adjusting the main valve opening of the main expansion valve, the following may be included: when the overall current value is greater than a preset first current value, or the heat exchange temperature difference value is greater than a preset first temperature difference value, or the exhaust temperature value is greater than a preset first temperature value, the lower limit of the main valve opening limit range is increased; when the overall current value is less than a preset second current value or the exhaust temperature value is less than a preset second temperature value, the upper limit of the main valve opening limit range is decreased.

[0050] The preset operating parameter table can be used to set the main valve opening limit range, which means that the main valve opening will be limited within this limit range. This main valve opening limit range will be dynamically updated as the overall current value, heat exchange temperature difference value, and exhaust temperature value meet the preset main valve reliability conditions.

[0051] Specifically, when the overall current value exceeds a preset first current value, or the heat exchange temperature difference exceeds a preset first temperature difference value, or the exhaust temperature exceeds a preset first temperature value (i.e., when the first main valve reliability condition is met), the lower limit of the main valve opening restriction range (i.e., the main valve opening restriction range when the first main valve reliability condition is met) is increased. For example, if the main valve opening restriction range when the first main valve reliability condition is met is [20, 100], increasing the lower limit by 20 changes it to [40, 100]. By updating the lower limit of the main valve opening restriction range in this way and narrowing the main valve opening restriction range, the main valve opening of the air source heat pump unit can be limited to the main valve opening restriction range after the increase in the lower limit value during similar operating conditions in the future, further improving the unit's operational reliability.

[0052] When the overall current value is less than the preset second current value or the exhaust temperature value is less than the preset second temperature value (i.e., when the second main valve reliability condition is met), the upper limit of the main valve opening restriction range (i.e., the main valve opening restriction range when the second main valve reliability condition is met) is reduced. For example, if the main valve opening restriction range when the second main valve reliability condition is met is [20, 100], reducing the upper limit by 100 will result in [20, 80]. By updating the upper limit of the main valve opening restriction range in this way and narrowing the main valve opening restriction range, the main valve opening of the air source heat pump unit can be limited to the main valve opening restriction range after the reduction of the upper limit value during similar operating conditions in the future, further improving the unit's operational reliability.

[0053] When increasing the lower limit of the main valve opening range, the amount of increase can be preset according to the actual situation, and this application does not impose any special restrictions on this. When decreasing the upper limit of the main valve opening range, the amount of decrease can be preset according to the actual situation, and this application does not impose any special restrictions on this.

[0054] In one embodiment, step S220 involves adjusting the opening degree and opening limit range of the gas supply expansion valve based on the preset reliable conditions of the gas supply valve met by the exhaust superheat value. This includes: when the exhaust superheat value is greater than a preset first superheat value, increasing the opening degree of the gas supply valve by a third degree and raising the lower limit of the opening limit range of the gas supply valve; when the exhaust superheat value is less than a preset second superheat value, decreasing the opening degree of the gas supply valve by a fourth degree and lowering the upper limit of the opening limit range of the gas supply valve.

[0055] In this embodiment, the preset reliable conditions for the exhaust superheat value to be satisfied include "the first reliable condition for increasing the opening of the exhaust valve by a third degree" and "the second reliable condition for decreasing the opening of the exhaust valve by a fourth degree".

[0056] When the exhaust superheat value is greater than the preset first superheat value D1, the reliability condition of the first air replenishment valve is met, indicating that the air replenishment volume is too small at this time. Increasing the air replenishment valve opening to a third opening N1 can increase the air replenishment volume and further effectively ensure the reliability of the air replenishment valve opening, that is, to achieve reliable air replenishment volume.

[0057] When the exhaust superheat value is less than the preset second superheat value D2, the reliability condition of the second air supply valve is met. This indicates that the air supply volume is too large, increasing the risk of liquid return and liquid slugging in the unit. Therefore, the air supply valve opening is reduced to the fourth opening N2 to reduce the air supply volume, further ensuring the reliability of the air supply valve opening, that is, achieving reliable air supply volume.

[0058] In one approach, the third opening N1 can be a pre-set unique opening for increasing the opening of the air supply valve, and the fourth opening N2 can be a pre-set unique opening for decreasing the opening of the air supply valve.

[0059] Furthermore, in one approach, the preset range of the actual operating parameters, the preset range of the exhaust superheat value, and the preset third sub-opening corresponding to these preset ranges can be determined from a preset second opening increase adjustment table, and this preset third sub-opening is designated as the third opening. Similarly, the preset range of the actual operating parameters, the preset range of the exhaust superheat value, and the preset fourth sub-opening corresponding to these preset ranges can be determined from a preset second opening decrease adjustment table, and this preset fourth sub-opening is designated as the fourth opening.

[0060] The preset second opening adjustment table can preset different preset ranges corresponding to the preset third sub-opening; the preset second opening adjustment table can also preset different preset ranges corresponding to the preset fourth sub-opening. In this way, the preset third sub-opening can be dynamically determined as the third opening based on actual operating parameters and exhaust superheat value, or the preset fourth sub-opening can be dynamically determined as the fourth opening, further improving the reliability of the air supply valve opening.

[0061] Furthermore, the preset operating parameter table can be used to set a limit range for the opening of the make-up air valve, that is, the opening of the make-up air valve will be limited within this limit range. This limit range will be dynamically updated as the exhaust superheat value meets the preset make-up air valve reliability conditions.

[0062] Specifically, when the exhaust superheat value is greater than the preset first superheat value D1 (i.e., when the first make-up air valve reliability condition is met), the lower limit of the make-up air valve opening limit range (i.e., the main valve opening limit range when the first make-up air valve reliability condition is met) is increased. For example, if the main valve opening limit range when the first make-up air valve reliability condition is met is [10, 80], increasing the lower limit by 10 changes it to [20, 80]. By updating the lower limit of the make-up air valve opening limit range in this way and narrowing the make-up air valve opening limit range, the opening of the make-up air valve of the air source heat pump unit can be limited to the make-up air valve opening limit range after the increase in the lower limit value during similar operating conditions and when optimizing performance, thereby further improving the unit's operational reliability.

[0063] When the exhaust superheat value is less than the preset second superheat value D2 (i.e., when the second make-up air valve reliability condition is met), the upper limit of the make-up air valve opening limit range (i.e., the main valve opening limit range when the second make-up air valve reliability condition is met) is reduced. For example, if the main valve opening limit range when the second make-up air valve reliability condition is met is [10, 80], reducing the upper limit by 80 will change it to [10, 70]. By updating the upper limit of the make-up air valve opening limit range in this way and narrowing the make-up air valve opening limit range, the opening of the make-up air valve of the air source heat pump unit can be limited to the make-up air valve opening limit range after the upper limit is reduced during similar operating conditions and when performance optimization is required, thereby further improving the unit's operational reliability.

[0064] When increasing the lower limit of the air supply valve opening range, the amount of increase can be preset according to actual conditions, and this application does not impose any special limitations on this. When decreasing the upper limit of the air supply valve opening range, the amount of decrease can be preset according to actual conditions, and this application does not impose any special limitations on this.

[0065] In one embodiment, the method for determining the performance of the target unit in step S230 may specifically include: when the temperature difference between the set temperature value and the outlet water temperature value is greater than or equal to a preset temperature difference threshold, the performance of the target unit is heating performance; when the temperature difference is less than the preset temperature difference threshold, the performance of the target unit is energy-saving performance.

[0066] Set temperature value T set With the outlet water temperature value T 出水 Temperature difference ΔT 目标温差 (ΔT) 目标温差 =T set -T 出水 When the temperature difference is greater than or equal to the preset temperature difference threshold X (i.e., ΔT) 目标温差 When the value is ≥X, it indicates that the water temperature is far from the set temperature value and the water temperature needs to be increased as soon as possible to ensure user comfort. At this time, the target unit performance is determined to be heating performance, and the air source heat pump unit will enter the heating performance priority mode.

[0067] Temperature difference ΔT 目标温差 (ΔT) 目标温差 =T set -T 出水 When the temperature difference is less than the preset temperature difference threshold X (i.e., ΔT) 目标温差 When the temperature is <X), it indicates that the water temperature is close to the set temperature value and can be operated in a more economical and energy-saving mode. At this time, the target unit performance is determined to be energy-saving performance, and the air source heat pump unit will enter the energy-saving priority mode.

[0068] When the target unit performance is heating performance, in step S230, within the limit range of the gas supply valve opening, the gas supply valve opening is optimized and adjusted with the goal of maximizing the target unit performance. Specifically, the gas supply valve opening can be adjusted within the limit range of the gas supply valve opening until the performance index of heating performance reaches its maximum value (e.g., the heating capacity Q reaches its maximum value). At this time, the gas supply expansion valve can be maintained at the gas supply valve opening when the performance index of heating performance reaches its maximum value.

[0069] When the target unit performance is energy-saving performance, in step S230, within the limit range of the air supply valve opening, the air supply valve opening is optimized and adjusted with the goal of maximizing the target unit performance. Specifically, the air supply valve opening can be adjusted within the limit range of the air supply valve opening until the performance index of energy saving performance reaches the maximum value (such as the energy efficiency ratio COP reaching the maximum value). At this time, the air supply expansion valve can be maintained at the air supply valve opening when the performance index of energy saving performance reaches the maximum value.

[0070] The heating capacity Q can be equal to the product of the inlet and outlet water temperature difference, the water mass flow rate, and the specific heat capacity; the energy efficiency ratio COP can be equal to the heating capacity Q divided by the power P. During the optimization and adjustment process, the heating capacity Q or the energy efficiency ratio COP can be detected and calculated in real time.

[0071] Furthermore, in one embodiment, step S230, after optimizing and adjusting the opening of the make-up air valve within the limit range of the make-up air valve opening with the optimization goal of maximizing the performance of the target unit, may further include: updating the preset operating parameter table based on the actual operating parameters, main valve opening and make-up air valve opening when the performance of the target unit is maximized, so that when the air source heat pump unit is started up next time, the main expansion valve and make-up air expansion valve are adjusted to the initial opening according to the preset operating parameter table.

[0072] Based on the actual operating parameters, main valve opening, and make-up air valve opening when the target unit's performance is maximized, the preset operating parameter table is updated. Then, during the next startup of the air source heat pump unit, the initial opening corresponding to the actual operating parameters (such as outdoor ambient temperature, outlet water temperature, and exhaust superheat) is determined from the updated preset operating parameter table. The main expansion valve and make-up air expansion valve are then adjusted to their initial openings, further improving the operational reliability of the air source heat pump unit.

[0073] The following describes the aforementioned embodiments in further detail with reference to the control flow of an air source heat pump unit in a specific scenario. In this scenario, the control of the air source heat pump unit is achieved by applying the aforementioned embodiments of this application. See reference [link to relevant documentation]. Figure 3 In this scenario, the control process of the air source heat pump unit may include steps S310 to S3190. The meanings of the terms are the same as in the above-described air source heat pump unit control method, and specific implementation details can be found in the description of the method embodiment.

[0074] Step S310: Start the unit and run it.

[0075] Step S320: Set the initial opening. Specifically, first, query the preset operating parameter table to determine the initial opening corresponding to the actual operating parameters (such as outdoor ambient temperature, outlet water temperature and exhaust superheat value), and then adjust the main expansion valve and the air replenishment expansion valve to the initial opening, that is, adjust the main expansion valve to the initial main valve opening and adjust the air replenishment expansion valve to the initial air replenishment valve opening.

[0076] Step S330: Perform dynamic reliability assessment.

[0077] In steps S340 to S370, the main valve opening of the main expansion valve is adjusted according to the preset main valve reliability conditions met by the overall current value, heat exchange temperature difference value and exhaust temperature value.

[0078] Step S340: Determine whether the overall current value is greater than A1, or the heat exchange temperature difference value is greater than B1, or the exhaust temperature value is greater than C1; if yes, proceed to step S350; otherwise, proceed to step S360.

[0079] In step S350, the main valve opening is increased by a first opening M1, and the lower limit of the main valve opening limit range is increased. Then, return to step S330.

[0080] Step S360: Determine whether the overall current value is less than A2 or the exhaust temperature value is less than C2; if yes, proceed to step S360; otherwise, proceed to step S380.

[0081] In step S370, the main valve opening is reduced by a second opening M2, and the upper limit of the main valve opening limit range is also reduced. Then, the process returns to step S330.

[0082] In steps S380 to S3110, after the main valve opening is adjusted, the gas supply valve opening and the gas supply valve opening limit range are adjusted according to the preset gas supply valve reliability conditions met by the exhaust superheat value.

[0083] Step S380: Determine if the exhaust superheat value is greater than D1; if yes, proceed to step S390; otherwise, proceed to step S3100.

[0084] In step S390, the opening degree of the air supply valve is increased by a third degree N1, and the lower limit of the air supply valve opening degree limit range is raised. Then, return to step S330.

[0085] Step S3100: Determine if the exhaust superheat value is less than D2; if yes, proceed to step S3110; otherwise, proceed to step S3120.

[0086] In step S3110, the opening degree of the air supply valve is reduced to the fourth opening degree N2, and the upper limit of the air supply valve opening degree limit range is also reduced. Then, return to step S330.

[0087] Step S3120: Complete the dynamic reliability assessment to ensure the reliability of the main valve opening and the air supply valve opening.

[0088] Step S3130: Perform performance optimization.

[0089] Step S3140: Determine the heating capacity Q and the energy efficiency ratio COP.

[0090] Step S3150: Determine whether the temperature difference is greater than or equal to X, that is, determine whether the temperature difference between the set temperature value and the outlet water temperature value is greater than or equal to the preset temperature difference threshold X. If yes, proceed to step S3160; if no, proceed to step S3170.

[0091] In step S3160, the target unit performance is heating performance. That is, at this time, the target unit performance is determined to be heating performance, and the air source heat pump unit will enter the heating performance priority mode.

[0092] In step S3170, the target unit performance is energy-saving performance. That is, at this time, the target unit performance is determined to be energy-saving performance, and the air source heat pump unit will enter the energy-saving performance priority mode.

[0093] Step S3180: Within the limit range of the gas supply valve opening, optimize the performance with the goal of maximizing the performance of the target unit. That is, within the limit range of the gas supply valve opening, optimize and adjust the gas supply valve opening with the goal of maximizing the performance of the target unit.

[0094] When the target unit's performance is heating performance, the specific steps can be as follows: Adjust the opening of the make-up air valve within its opening limit range until the heating performance indicator reaches its maximum value (e.g., the heating capacity Q reaches its maximum value). At this point, maintain the make-up air expansion valve at the opening level required when the heating performance indicator reaches its maximum value. For example, reduce the make-up air valve opening by a predetermined optimal opening within its opening limit range; then, determine whether the heating capacity Q increases. If it increases, continue to reduce the make-up air valve opening within its opening limit range until the heating capacity Q no longer increases and reaches its maximum value; if it does not increase, continue to increase the make-up air valve opening within its opening limit range until the heating capacity Q no longer increases and reaches its maximum value.

[0095] When the target unit performance is energy-saving, the specific approach can be as follows: Adjust the opening of the make-up air valve within its limit range until the energy-saving performance indicator reaches its maximum value (e.g., the Coefficient of Performance (COP) reaches its maximum value). Then, maintain the make-up air expansion valve at the opening level required to achieve the maximum energy-saving performance indicator. For example, reduce the make-up air valve opening by a predetermined optimal opening within its limit range; then, determine if the COP increases. If it increases, continue to decrease the make-up air valve opening within its limit range until the COP no longer increases and reaches its maximum value; if it does not increase, continue to increase the make-up air valve opening within its limit range until the COP no longer increases and reaches its maximum value.

[0096] Step S3190: Update the operating parameters. Specifically, based on the actual operating parameters, main valve opening, and make-up air valve opening when the target unit performance is maximized, update the preset operating parameter table so that when the air source heat pump unit is started up next time, the main expansion valve and make-up air expansion valve will be adjusted to the initial opening according to the preset operating parameter table.

[0097] In this scenario, by applying the aforementioned embodiments of this application, a global balance between unit performance and reliability can be effectively achieved under operating conditions such as wide temperature range and variable load. In particular, a global balance between heating performance / energy saving performance and reliability can be effectively achieved under low temperature heating conditions.

[0098] To facilitate better implementation of the air source heat pump unit control method provided in this application, this application also provides an air source heat pump unit control device based on the above-described air source heat pump unit control method. The meanings of the terms used are the same as in the above-described air source heat pump unit control method, and specific implementation details can be found in the descriptions in the method embodiments. Figure 4 A block diagram of an air source heat pump unit control device according to an embodiment of this application is shown.

[0099] like Figure 4As shown, the air source heat pump unit control device 400 may include: a main valve adjustment module 410, which can be used to adjust the main valve opening of the main expansion valve according to the preset main valve reliability conditions satisfied by the overall current value, heat exchange temperature difference value, and exhaust temperature value; a make-up air valve adjustment module 420, which can be used to adjust the make-up air valve opening and the make-up air valve opening limit range of the make-up air expansion valve according to the preset make-up air valve reliability conditions satisfied by the exhaust superheat value after the main valve opening adjustment is completed; and a performance optimization module 430, which can be used to optimize the make-up air valve opening within the make-up air valve opening limit range, with the optimization goal of maximizing the target unit performance.

[0100] In some embodiments of this application, when adjusting the opening degree and opening limit range of the air supply expansion valve according to the preset air supply valve reliability conditions satisfied by the exhaust superheat value, the air supply valve adjustment module is used to: increase the opening degree of the air supply valve by a third degree and raise the lower limit of the opening limit range of the air supply valve when the exhaust superheat value is greater than a preset first superheat value; and decrease the opening degree of the air supply valve by a fourth degree and lower the upper limit of the opening limit range of the air supply valve when the exhaust superheat value is less than a preset second superheat value.

[0101] In some embodiments of this application, when adjusting the main valve opening of the main expansion valve according to the preset main valve reliability conditions satisfied by the overall machine current value, heat exchange temperature difference value, and exhaust temperature value, the main valve adjustment module 410 can be used to: increase the main valve opening by a first degree when the overall machine current value is greater than a preset first current value, or the heat exchange temperature difference value is greater than a preset first temperature difference value, or the exhaust temperature value is greater than a preset first temperature value; and decrease the main valve opening by a second degree when the overall machine current value is less than a preset second current value or the exhaust temperature value is less than a preset second temperature value.

[0102] In some embodiments of this application, after adjusting the main valve opening of the main expansion valve, the main valve adjustment module 410 can be used to: increase the lower limit of the main valve opening limit range when the overall current value is greater than a preset first current value, or the heat exchange temperature difference value is greater than a preset first temperature difference value, or the exhaust temperature value is greater than a preset first temperature value; and decrease the upper limit of the main valve opening limit range when the overall current value is less than a preset second current value or the exhaust temperature value is less than a preset second temperature value.

[0103] In some embodiments of this application, the performance optimization module 430 can be used to: when the temperature difference between the set temperature value and the outlet water temperature value is greater than or equal to a preset temperature difference threshold, the performance of the target unit is heating performance; when the temperature difference is less than the preset temperature difference threshold, the performance of the target unit is energy-saving performance.

[0104] In some embodiments of this application, after optimizing the opening of the make-up air valve within the limit range of the make-up air valve opening with the optimization goal of maximizing the performance of the target unit, the device further includes an update module that can be used to: update a preset operating parameter table based on the actual operating parameters when the performance of the target unit is maximized, the opening of the main valve and the opening of the make-up air valve, so that when the air source heat pump unit is started up for the next time, the main expansion valve and the make-up air expansion valve are adjusted to the initial opening according to the preset operating parameter table.

[0105] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0106] Furthermore, embodiments of this application also provide an electronic device, such as... Figure 5 As shown, Figure 5 A block diagram of an electronic device according to an embodiment of this application is shown, specifically: The electronic device may include components such as a processor 501 with one or more processing cores, a memory 502 with one or more computer-readable storage media, a power supply 503, and an input unit 504. Those skilled in the art will understand that... Figure 5 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein: The processor 501 is the control center of the electronic device, connecting various parts of the computer device via various interfaces and lines. It executes software programs and / or modules stored in the memory 502, and calls data stored in the memory 502, to perform various functions of the computer device and process data. Optionally, the processor 501 may include one or more processing cores; preferably, the processor 501 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user page, and application programs, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 501.

[0107] The memory 502 can be used to store software programs and modules. The processor 501 executes various functional applications and data processing by running the software programs and modules stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 501 with access to the memory 502.

[0108] The electronic device also includes a power supply 503 that supplies power to various components. Preferably, the power supply 503 can be logically connected to the processor 501 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 503 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0109] The electronic device may also include an input unit 504, which can be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0110] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 501 in the electronic device can load the executable files corresponding to the processes of one or more computer programs into the memory 502 according to the following instructions, and the processor 501 runs the computer programs stored in the memory 502, thereby realizing the various functions in the foregoing embodiments of this application.

[0111] For example, processor 501 can perform the following: adjust the main valve opening of the main expansion valve according to the preset main valve reliability conditions satisfied by the overall unit current value, heat exchange temperature difference value, and exhaust temperature value; after the main valve opening is adjusted, adjust the gas supply valve opening and gas supply valve opening limit range of the gas supply expansion valve according to the preset gas supply valve reliability conditions satisfied by the exhaust superheat value; within the gas supply valve opening limit range, optimize the gas supply valve opening with the goal of maximizing the performance of the target unit.

[0112] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a computer program, or by a computer program controlling related hardware. The computer program can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0113] Therefore, embodiments of this application also provide a storage medium storing a computer program that can be loaded by a processor to execute the steps in any of the methods provided in embodiments of this application.

[0114] The storage medium can be a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0115] Since the computer program stored in the storage medium can execute the steps of any of the methods provided in the embodiments of this application, the beneficial effects that the methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0116] According to another embodiment of this application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the methods provided in the various optional implementations described in the embodiments of this application.

[0117] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0118] It should be understood that this application is not limited to the embodiments described above and shown in the accompanying drawings, but various modifications and changes can be made without departing from its scope.

Claims

1. A control method for an air source heat pump unit, characterized in that, include: Adjust the main valve opening of the main expansion valve according to the preset main valve reliability conditions met by the overall current value, heat exchange temperature difference value and exhaust temperature value; After the main valve opening is adjusted, the gas supply valve opening and the gas supply valve opening limit range are adjusted according to the preset gas supply valve reliability conditions met by the exhaust superheat value. Within the specified limit of the air supply valve opening, the opening of the air supply valve is optimized and adjusted with the goal of maximizing the performance of the target unit.

2. The method according to claim 1, characterized in that, The adjustment of the gas supply valve opening degree and the gas supply valve opening limit range based on the preset gas supply valve reliability conditions satisfied by the exhaust superheat value includes: When the exhaust superheat value is greater than the preset first superheat value, the opening of the air supply valve is increased by a third degree, and the lower limit of the air supply valve opening limit range is raised. When the exhaust superheat value is less than the preset second superheat value, the opening of the air supply valve is reduced to a fourth degree, and the upper limit of the air supply valve opening limit range is lowered.

3. The method according to claim 1, characterized in that, The step of adjusting the main valve opening of the main expansion valve based on the preset main valve reliability conditions met by the overall machine current value, heat exchange temperature difference value, and exhaust temperature value includes: When the overall current value is greater than the preset first current value, or the heat exchange temperature difference value is greater than the preset first temperature difference value, or the exhaust temperature value is greater than the preset first temperature value, the opening degree of the main valve is increased by the first degree. When the overall current value is less than the preset second current value or the exhaust temperature value is less than the preset second temperature value, the opening degree of the main valve is reduced by the second degree.

4. The method according to claim 3, characterized in that, After adjusting the main valve opening of the main expansion valve, the method further includes: When the overall current value is greater than the preset first current value, or the heat exchange temperature difference value is greater than the preset first temperature difference value, or the exhaust temperature value is greater than the preset first temperature value, the lower limit of the main valve opening limit range is increased. When the overall current value is less than the preset second current value or the exhaust temperature value is less than the preset second temperature value, the upper limit of the main valve opening limit range is reduced.

5. The method according to any one of claims 1 to 4, characterized in that, The target unit's performance includes: When the temperature difference between the set temperature value and the outlet water temperature value is greater than or equal to the preset temperature difference threshold, the performance of the target unit is the heating performance. When the temperature difference is less than the preset temperature difference threshold, the target unit performance is energy-saving performance.

6. The method according to any one of claims 1 to 4, characterized in that, After optimizing and adjusting the opening of the gas supply valve within the specified opening limit range to maximize the performance of the target unit, the method further includes: Based on the actual operating parameters when the target unit performance is maximized, the opening degree of the main valve and the opening degree of the make-up air valve, the preset operating parameter table is updated so that when the air source heat pump unit is started up next time, the main expansion valve and the make-up air expansion valve are adjusted to the initial opening degree according to the preset operating parameter table.

7. A control device for an air source heat pump unit, characterized in that, include: The main valve adjustment module is used to adjust the main valve opening of the main expansion valve according to the preset main valve reliability conditions met by the overall current value, heat exchange temperature difference value and exhaust temperature value. The air replenishment valve adjustment module is used to: after the main valve opening is adjusted, adjust the air replenishment valve opening and the air replenishment valve opening limit range of the air replenishment expansion valve according to the preset air replenishment valve reliability conditions satisfied by the exhaust superheat value. The performance optimization module is used to optimize and adjust the opening of the air supply valve within the limit range of the air supply valve opening, with the optimization goal of maximizing the performance of the target unit.

8. The apparatus according to claim 7, characterized in that, When adjusting the opening degree and opening limit range of the replenishing valve of the replenishing expansion valve according to the preset reliability conditions of the replenishing valve satisfied by the exhaust superheat value, the replenishing valve adjustment module is used for: When the exhaust superheat value is greater than the preset first superheat value, the opening of the air supply valve is increased by a third degree, and the lower limit of the air supply valve opening limit range is raised. When the exhaust superheat value is less than the preset second superheat value, the opening of the air supply valve is reduced to a fourth degree, and the upper limit of the air supply valve opening limit range is lowered.

9. A storage medium, characterized in that, It stores a computer program that, when executed by the processor of the electronic device, causes the electronic device to perform the method described in any one of claims 1 to 6.

10. An electronic device, characterized in that, include: Memory, which stores computer programs; A processor reads a computer program stored in memory to perform the method described in any one of claims 1 to 6.

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