CN117308432A - Control method and device of heat pump unit, heat pump unit and storage medium - Google Patents
Control method and device of heat pump unit, heat pump unit and storage medium Download PDFInfo
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- CN117308432A CN117308432A CN202311485352.6A CN202311485352A CN117308432A CN 117308432 A CN117308432 A CN 117308432A CN 202311485352 A CN202311485352 A CN 202311485352A CN 117308432 A CN117308432 A CN 117308432A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 250
- 238000004781 supercooling Methods 0.000 claims abstract description 55
- 230000015654 memory Effects 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000005485 electric heating Methods 0.000 claims description 11
- 239000008236 heating water Substances 0.000 claims description 9
- 238000013507 mapping Methods 0.000 claims description 6
- 239000003507 refrigerant Substances 0.000 abstract description 42
- 230000001276 controlling effect Effects 0.000 description 14
- 239000007788 liquid Substances 0.000 description 14
- 238000004891 communication Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000001965 increasing effect Effects 0.000 description 9
- 238000004378 air conditioning Methods 0.000 description 7
- 238000004590 computer program Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 3
- 238000013528 artificial neural network Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009491 slugging Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/215—Temperature of the water before heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/219—Temperature of the water after heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
- F24H15/429—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Computer Hardware Design (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The application relates to the technical field of heat pump units, and provides a control method and device of a heat pump unit, the heat pump unit and a storage medium, wherein the method comprises the following steps: when the operation mode of the heat pump unit is the life hot water mode, determining whether the heat pump unit has a starting-up requirement or not; if the starting-up requirement of the heat pump unit is determined, acquiring the supercooling degree of the domestic hot water heat exchanger, and determining the target output frequency of a compressor in the heat pump unit based on the supercooling degree; the compressor is controlled to operate at a target output frequency. The supercooling degree of the domestic hot water heat exchanger is controlled in a reasonable range by controlling the output frequency of the compressor in the heat pump unit when the heat pump unit runs in the domestic hot water mode, so that the heat of the refrigerant output by the compressor is fully absorbed in the domestic hot water mode, and the energy efficiency of the heat pump unit is improved.
Description
Technical Field
The present disclosure relates to the field of heat pump units, and in particular, to a control method and apparatus for a heat pump unit, and a storage medium.
Background
The heat pump is a high-efficiency energy-saving device which fully utilizes low-grade heat energy. The heat pump is widely applied, namely a mechanical device which forces heat to flow from a low-temperature object to a high-temperature object in a reverse Carnot cycle mode, and only consumes a small amount of reverse cycle net work, so that larger heating capacity can be obtained, and low-grade heat energy which is difficult to apply can be effectively utilized to achieve the purpose of energy conservation.
When the heat pump unit works in the domestic hot water mode (for providing domestic hot water by absorbing low-grade heat energy), a mode is generally adopted in which the heat pump unit is directly controlled to operate at a higher frequency so as to achieve the purpose of quickly preparing the domestic hot water, however, the operation mode has the problem of lower energy efficiency.
Disclosure of Invention
In view of this, the present application provides a control method and apparatus for a heat pump unit, and a storage medium, so as to solve the problem in the related art that the heat pump unit is started at a high frequency when running in a domestic hot water mode, and has low energy efficiency.
A first aspect of the embodiments of the present application provides a control method of a heat pump unit, where the heat pump unit includes a domestic hot water heat exchanger, and the control method includes: when the operation mode of the heat pump unit is a domestic hot water mode, determining whether the heat pump unit has a starting-up requirement or not; if the heat pump unit is determined to have a starting requirement, acquiring the supercooling degree of the domestic hot water heat exchanger, and determining the target output frequency of a compressor in the heat pump unit based on the supercooling degree; and controlling the compressor to operate according to the target output frequency.
In some embodiments, the determining whether the heat pump unit has a power-on requirement includes: acquiring the hot water temperature and the hot water inlet temperature of the heat pump unit; and if the hot water temperature and the hot water inlet temperature are determined to meet the preset conditions, determining that the heat pump unit has a starting requirement.
In some embodiments, the determining that the hot water temperature and the hot water inlet temperature both meet a preset condition includes: if the hot water temperature is determined to be lower than a first temperature threshold, the hot water inlet temperature is determined to be lower than a second temperature threshold, and the hot water inlet temperature is determined to be lower than a difference value between the highest heating outlet temperature of the heat pump unit and a preset temperature parameter, the hot water temperature and the hot water inlet temperature are determined to meet the preset condition.
In some embodiments, the determining the target output frequency of the compressor in the heat pump unit based on the degree of supercooling comprises: determining a target supercooling degree threshold range corresponding to the supercooling degree; determining a compressor frequency adjustment parameter corresponding to the target supercooling degree threshold range from a preset compressor frequency mapping table according to the target supercooling degree threshold range; and calculating the target output frequency of the compressor in the current operation period based on the compressor frequency adjustment parameter and the historical output frequency of the compressor in the previous operation period, wherein if the current operation period is an initial operation period, the initial output frequency of the compressor is used as the target output frequency.
In some embodiments, after the controlling the compressor to operate at the target output frequency, the controlling method further comprises: determining whether the heat pump unit meets the domestic hot water mode requirement; and if the heat pump unit is determined to meet the domestic hot water mode requirement, controlling the heat pump unit to stop running.
In some embodiments, the determining whether the heat pump unit meets domestic hot water mode requirements includes: if any one of the following conditions is met, determining that the heat pump unit meets the domestic hot water mode requirement: in a first duration, the hot water outlet temperature of the heat pump unit is higher than the highest heating outlet temperature of the heat pump unit; in the second time period, the hot water inlet temperature of the heat pump unit is higher than the difference value between the highest heating outlet temperature and the first temperature parameter; and in the third time period, the high-pressure corresponding saturation temperature of the heat pump unit is higher than the sum of the highest heating water outlet temperature and the second temperature parameter.
In some embodiments, the control method further comprises: and if the hot water temperature of the heat pump unit is determined to be lower than a third temperature threshold, controlling the heat pump unit to start an electric heating mode, and closing the electric heating mode until the hot water temperature is higher than or equal to the highest heating water outlet temperature of the heat pump unit.
A second aspect of the embodiments of the present application provides a control device of a heat pump unit, the heat pump unit includes a domestic hot water heat exchanger, the control device includes: the judging module is used for determining whether the heat pump unit has a starting requirement or not when the operation mode of the heat pump unit is determined to be a domestic hot water mode; the determining module is used for acquiring the supercooling degree of the domestic hot water heat exchanger and determining the target output frequency of the compressor in the heat pump unit based on the supercooling degree if the heat pump unit is determined to have a starting requirement; and the control module is used for controlling the compressor to run according to the target output frequency.
A third aspect of the embodiments of the present application provides a heat pump unit, including a memory, a processor, and computer readable instructions stored in the memory and executable on the processor, where the processor implements a control method of the heat pump unit when executing the computer readable instructions.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium storing computer-readable instructions that, when executed by a processor, implement the method for controlling a heat pump unit described above.
In the control method of the heat pump unit, when the heat pump unit determines that the operation mode is the domestic hot water mode, before the heat pump unit is controlled to prepare the domestic hot water, whether the heat pump unit has a starting requirement or not is firstly determined, namely whether the heat pump unit needs to be started to meet the domestic hot water requirement or not is determined, and when the heat pump unit is determined to have the starting requirement, the heat pump unit is controlled to start to operate so as to prepare the domestic hot water; secondly, when the heat pump unit operates in the living hot water mode, the supercooling degree is controlled in a reasonable range by controlling the output frequency of the compressor, so that the heat of the refrigerant output by the compressor is fully absorbed in the living hot water mode, and the energy efficiency of the heat pump unit is improved. According to the embodiment of the application, the heat pump unit is controlled, so that the working efficiency and the energy efficiency of the heat pump unit are effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments of the present application will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram illustrating operation of a refrigerant corresponding to a domestic hot water mode according to an embodiment of the present disclosure;
fig. 2 is a flowchart of an implementation of a control method of a heat pump unit according to an embodiment of the present application;
fig. 3 is an exemplary diagram of implementation principle of a control method of a heat pump unit according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a control device of a heat pump unit according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a heat pump unit according to an embodiment of the present application.
Description of main reference numerals: a heat pump unit-100; a compressor-101; a domestic hot water heat exchanger-102; enthalpy increasing module-103; a first throttling element-1031; economizer-1032; a second throttling element-1033; an outdoor heat exchanger-104; an air-conditioning side heat exchanger-105; a domestic hot water tank-10; a liquid storage tank-20; a gas-liquid separator-30; a first three-way valve-40; a first port 401 of a first three-way valve; a second port 402 of the first three-way valve; a third port 403 of the first three-way valve; a second three-way valve-41; a first port 411 of a second three-way valve; a second port 412 of a second three-way valve; a third port 413 of the second three-way valve; a four-way valve-50; a first temperature sensor-60; a second temperature sensor-61; a third temperature sensor-62; a fourth temperature sensor-63; check valve-70-75; and a water pump-80.
Detailed Description
It should be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used for distinguishing between similar objects and not for describing a particular sequential or chronological order.
It should be further noted that the method disclosed in the embodiments of the present application or the method shown in the flowchart, including one or more steps for implementing the method, may be performed in an order that the steps may be interchanged with one another, and some steps may be deleted without departing from the scope of the claims.
Some embodiments will be described below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
In some embodiments, the heat pump system is an entire system consisting of a heat pump unit, an end water system, and the like. The heat pump unit is the most core part in the heat pump system and is responsible for heat energy transfer and conversion. The heat pump unit generally includes components such as a compressor, an evaporator, a condenser, a throttle device (e.g., an expansion valve), a refrigerant pipe, a liquid storage tank, a gas-liquid separator, and a domestic hot water tank.
In the embodiment provided by the application, the operation mode of the heat pump unit is a domestic hot water mode, and when the heat pump unit operates in the domestic hot water mode, the heat pump unit can absorb heat in low-temperature renewable energy sources and raise the heat pump unit to a higher temperature so as to be used for preparing domestic hot water.
In some embodiments, the heat pump assembly may further comprise a control device. The heat pump unit can realize control of an operation mode, output frequency of the compressor, temperature detection and the like through the control device.
Referring to fig. 1, an exemplary diagram of operation of a refrigerant corresponding to a hot water life mode in a heat pump unit according to an embodiment of the present application is shown. Fig. 1 is a schematic diagram showing a part of a heat pump unit. As shown in fig. 1, the heat pump unit 100 includes a compressor 101, a domestic hot water heat exchanger 102, an enthalpy increasing module 103, an outdoor heat exchanger 104 (i.e., evaporator), an air-conditioning side heat exchanger 105 (i.e., condenser), and other core devices. The heat pump unit 100 further includes auxiliary devices such as a domestic hot water tank 10, a liquid storage tank 20, a gas-liquid separator 30, a water pump 80, a first temperature sensor 60, a second temperature sensor 61, a third temperature sensor 62, a fourth temperature sensor 63, and the like, and components such as a first three-way valve 40, a second three-way valve 41, a four-way valve 50, and a plurality of check valves 70 to 75, wherein the air-conditioning-side heat exchanger 105 may be connected to an end water system (for example, an air-conditioning water tank, and the like).
In some embodiments, the devices, components, etc. in the heat pump unit 100 may be connected by pipes. For example, the compressor 101 and the domestic hot water heat exchanger 102 are connected through a refrigerant pipe, and the domestic hot water heat exchanger 102 and the domestic hot water tank 10 may be connected through a hot water pipe.
In some embodiments, the compressor 101 is configured to compress a low temperature low pressure gaseous refrigerant into a high temperature high pressure gaseous refrigerant. The domestic hot water heat exchanger 102 is used for exchanging heat with the domestic hot water tank 10 to heat water in the domestic hot water tank 10 to prepare domestic hot water. The enthalpy increasing module 103 may include, for example, an economizer 1032, a first throttling element 1031, and a second throttling element 1033, where the economizer 1032, the first throttling element 1031, and the second throttling element 1033 cooperate to achieve an enthalpy increasing effect. The economizer 1032, the first throttling element 1031 and the second throttling element 1033 in combination may perform the function of the enthalpy increasing module 103. The outdoor heat exchanger 104 may be configured to absorb heat from an external renewable energy source, such that the refrigerant flowing into the outdoor heat exchanger 104 evaporates into a low temperature gaseous refrigerant. The low-temperature gaseous refrigerant is sucked by the compressor 101 and high-temperature high-pressure gaseous refrigerant is output. The air-conditioning side heat exchanger 105 may be a condenser, and the high-temperature and high-pressure gaseous refrigerant flowing through the air-conditioning side heat exchanger 105 may exchange heat with an air-conditioning water tank or the like. The liquid storage tank 20 may be used to store a liquid refrigerant to balance the pressure of the heat pump unit 100. The gas-liquid separator 30 may store a portion of the refrigerant in the system, preventing compressor slugging and excessive refrigerant dilution of the compressor oil.
In some embodiments, as shown in fig. 1, a first temperature sensor 60 is used to detect the hot water temperature, a second temperature sensor 61 is used to detect the hot water inlet temperature, a third temperature sensor 62 is used to detect the hot water outlet temperature, and a fourth temperature sensor 63 is used to detect the outlet temperature of the domestic hot water heat exchanger. The first three-way valve 40 is provided with a first port 401, a second port 402 and a third port 403 of the first three-way valve, respectively, and the second three-way valve 41 is provided with a first port 411, a second port 412 and a third port 413 of the second three-way valve, respectively. The second port 402 of the first three-way valve 40 and the third port 403 of the first three-way valve 40 are communicated with refrigerant pipelines of the domestic hot water heat exchanger 102 and the exhaust port of the compressor 101, and the first port 401 of the first three-way valve 40 and the third port 403 of the first three-way valve 40 are communicated with refrigerant pipelines of the four-way valve 60 and the exhaust port of the compressor 101; the first port 411 of the second three-way valve 41 and the third port 413 of the second three-way valve 41 are communicated with the refrigerant pipeline of the domestic hot water heat exchanger 102 and the four-way valve 60, and the third port 413 of the second three-way valve 41 and the second port 412 of the second three-way valve 41 are communicated with the refrigerant pipeline of the air-conditioning side heat exchanger 105 and the domestic hot water heat exchanger 102. The check valves 70 to 75 in the heat pump unit 100 can be used to control the forward and reverse flow rates of the refrigerant, so that the refrigerant can flow only in a predetermined direction. The water pump 80 between the domestic hot water heat exchanger 102 and the domestic hot water tank 10 can be used for circulating water between the domestic hot water heat exchanger 102 and the domestic hot water tank 10 to realize heat transfer.
In some embodiments, the heat pump unit is only used to prepare domestic hot water when the heat pump unit is operating in domestic hot water mode. At this time, the second port 402 and the third port 403 of the first three-way valve 40 are opened, and the first port 401 of the first three-way valve 40 is closed; the second port 412 and the third port 413 of the second three-way valve 41 are opened, and the first port 411 of the second three-way valve 41 is closed. The flow direction of the refrigerant when the heat pump unit operates in the domestic hot water mode is shown in fig. 1, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 101 flows into the domestic hot water heat exchanger 102 through the second port 402 and the third port 403 of the first three-way valve 40, and the domestic hot water heat exchanger 102 is communicated with the domestic hot water tank 10. The high-temperature high-pressure gaseous refrigerant flowing into the domestic hot water heat exchanger 102 exchanges heat with the domestic hot water tank 10 to realize the preparation of domestic hot water. The medium-temperature and high-pressure liquid refrigerant after heat exchange with the domestic hot water tank 10 flows out of the domestic hot water heat exchanger 102, flows into the liquid storage tank 20 through the second port 412 and the third port 413 of the second three-way valve 41, and then flows into the enthalpy increasing module 103. The low-temperature liquid refrigerant is formed by the medium-temperature and high-pressure liquid refrigerant through the enthalpy increasing module 103, flows into the outdoor heat exchanger 104, absorbs heat in the outdoor heat exchanger 104, the outdoor heat exchanger 104 absorbs external heat to evaporate the low-temperature liquid refrigerant into a low-temperature gaseous refrigerant, the low-temperature gaseous refrigerant is sucked by the compressor 101 through the four-way valve 50, and the compressor 101 compresses the low-temperature gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, so that the circulation of preparing the domestic hot water is completed.
In some embodiments, the heat pump assembly 100 may further include components such as a filter, a high pressure sensor, a high pressure protection switch, a low pressure sensor, and the like. Wherein, the filter can be used for filtering and removing impurities, pollutants and solid particles in the refrigerant. The high pressure sensor may be used to measure the high pressure value of the heat pump unit. The high-voltage protection switch can be used for monitoring the high-voltage condition of the heat pump unit. When the high voltage exceeds the set safety range, the high voltage protection switch automatically opens the circuit to prevent possible dangerous situations. The low pressure sensor may be used to measure a low pressure value of the heat pump unit.
Referring to fig. 2, a flowchart of an implementation of a method for controlling a heat pump unit according to an embodiment of the present application is shown, and the embodiment of the present application uses the heat pump unit 100 in fig. 1 as an example to develop and describe the method, and includes the following steps.
S11: and when the operation mode of the heat pump unit is the life hot water mode, determining whether the heat pump unit has a starting-up requirement.
In some embodiments, the user may output an operation mode of the heat pump unit including a domestic hot water mode, a cooling mode, or a heating mode by operating the central control panel. The central control panel may send operating mode information to the heat pump of the heat pump unit, which in some embodiments is living hot water mode information.
In some embodiments, it is determined whether a start-up requirement exists for the heat pump unit, that is, whether the heat pump unit needs to be started to prepare domestic hot water is determined, so as to meet the requirement of a user on the domestic hot water.
In some embodiments, when the heat pump unit determines that the operation mode is the domestic hot water mode, it may be determined whether the water in the current domestic hot water tank can meet the user requirement, for example, whether the temperature of the water in the current domestic hot water tank reaches the temperature of the domestic hot water required by the user. If the water in the current domestic hot water tank can meet the user demand (for example, the temperature of the water in the domestic hot water tank reaches the temperature demand of the user on the domestic hot water), at this time, if the heat pump unit is continuously started to perform heat exchange with the water in the domestic hot water tank through the domestic hot water heat exchanger, the water in the domestic hot water tank is heated, unnecessary energy waste and running cost can be generated, and even the heat pump unit is damaged. Therefore, before the heat pump unit is started to operate the domestic hot water mode to prepare the domestic hot water, whether the heat pump unit is required to be started or not is also required to be determined, namely whether the heat pump unit is required to be started to prepare the domestic hot water or not is determined, so that the requirement of a user on the domestic hot water is met. If the water in the current domestic hot water tank can not meet the user requirement, the heat pump unit is determined to have the starting requirement, and the heat pump unit can be controlled to start the domestic hot water mode to prepare the domestic hot water.
In some embodiments of the present application, determining whether a heat pump unit has a power-on requirement includes: acquiring the hot water temperature and the hot water inlet temperature of the heat pump unit; and if the hot water temperature and the hot water inlet temperature are determined to meet the preset conditions, determining that the heat pump unit has a starting requirement.
In some embodiments, as shown in the exemplary diagram of the coolant operation in the domestic hot water mode shown in fig. 1, the heat pump unit may detect the hot water temperature through the first temperature sensor; the temperature of the incoming hot water is detected by a second temperature sensor.
In some embodiments, in the process of determining whether the heat pump unit has a startup demand, the heat pump unit may acquire a hot water temperature and a hot water inlet temperature of the heat pump unit, and determine whether the heat pump unit has the startup demand by determining whether the hot water temperature and the hot water inlet temperature satisfy preset conditions.
In some embodiments, when the heat pump unit determines that the temperature of the hot water meets the preset condition, determining that the heat pump unit has a starting requirement, namely, starting the heat pump unit to prepare domestic hot water; when the hot water temperature or the hot water inlet temperature of the heat pump unit is determined to not meet the preset condition, the heat pump unit is determined to have no starting requirement, namely the current temperature of the water in the domestic hot water tank can meet the requirement of a user on the domestic hot water, and the heat pump unit is not required to be restarted to prepare the domestic hot water.
In some embodiments of the present application, determining that the hot water temperature and the hot water inlet temperature both satisfy the preset condition includes: if the hot water temperature is determined to be lower than the first temperature threshold, the hot water inlet temperature is determined to be lower than the second temperature threshold, and the hot water inlet temperature is determined to be lower than the difference value between the highest heating outlet temperature of the heat pump unit and the preset temperature parameter, the hot water temperature and the hot water inlet temperature are determined to meet the preset condition.
In some embodiments, the first temperature threshold, the second temperature threshold, and the preset temperature parameter may be all set in a customized manner. For example, the first temperature threshold may be set to 53 ℃, the second temperature threshold may be set to 48 ℃, and the preset temperature parameter may be set to 13 ℃. For the highest heating water outlet temperature, the temperature can be obtained by inquiring the related product specification of the heat pump unit and the related parameters provided in the technical document.
In some embodiments, the heat pump unit determines whether the hot water temperature meets a preset condition, including determining whether the hot water temperature is less than a first temperature threshold, whether the hot water inlet temperature is less than a second temperature threshold, and whether the hot water inlet temperature is less than a difference between a highest heating outlet temperature of the heat pump unit and a preset temperature parameter. When the hot water temperature is determined to be smaller than the first temperature threshold, the hot water inlet temperature is smaller than the second temperature threshold, and the hot water inlet temperature is smaller than the difference value between the highest heating outlet temperature of the heat pump unit and the preset temperature parameter, the hot water temperature is determined to meet the preset condition, so that the heat pump unit is determined to have a starting requirement, and the heat pump unit needs to be started to prepare domestic hot water so as to meet the requirement of a user on the domestic hot water.
In some embodiments of the present application, it is determined that the heat pump unit does not have a start-up requirement if any one or more of the following occurs: the hot water temperature is greater than or equal to a first temperature threshold; the temperature of the hot water inlet is higher than or equal to a second temperature threshold; the inlet temperature of the hot water is higher than or equal to the difference value between the highest heating outlet temperature of the heat pump unit and the preset temperature parameter.
S12: if the starting-up requirement of the heat pump unit is determined, the supercooling degree of the heat pump unit is obtained, and the target output frequency of the compressor in the heat pump unit is determined based on the supercooling degree of the domestic hot water heat exchanger.
In some embodiments, when it is determined that the heat pump has a start-up requirement and the heat pump unit needs to be started to operate in the domestic hot water mode, the compressor in the heat pump unit may be started according to the initial output frequency.
In some embodiments, the initial output frequency may be an initial output frequency set by the factory of the compressor, or may be set in a customized manner, for example, the initial output frequency may be 38Hz, 40Hz, or the like. The target output frequency represents the target output frequency of the compressor at the current operation cycle.
Maintaining a proper degree of supercooling is an important factor in ensuring stable operation of the heat pump unit during operation of the heat pump unit. When the supercooling degree is too low, the heat required by the domestic hot water heat exchanger is low, the frequency of the compressor is reduced, the heat output by the compressor is reduced, and the phenomenon that the output heat is too high to cause unnecessary heat loss due to the fact that the output frequency of the compressor is too high is avoided; when the supercooling degree is too high, the heat required by the domestic hot water heat exchanger is high, the frequency of the compressor is increased, the heat output by the compressor is increased, and the phenomenon that the heat output by the compressor is too low to cause too low heat exchange efficiency is avoided. Therefore, after the heat pump is determined to have a starting requirement and the heat pump unit is started to operate, the heat of the refrigerant output by the compressor is fully absorbed in order to ensure that the energy efficiency of the heat pump unit is improved in a domestic hot water mode, the supercooling degree of a domestic hot water heat exchanger in the heat pump unit is required to be monitored, and the output frequency of the compressor is regulated and controlled based on the supercooling degree, so that the supercooling degree is ensured to be kept in a reasonable range, and the stable operation of the heat pump is ensured.
In some embodiments, the heat pump assembly may follow the following formula: supercooling = compressor exhaust saturation temperature-1.2-outlet temperature of domestic hot water heat exchanger, supercooling degree of domestic hot water heat exchanger is determined. The compressor discharge saturation temperature refers to a temperature at which a gas (typically, a refrigerant) discharged from the compressor reaches a saturation state at a given discharge pressure, and in some embodiments, the heat pump unit may obtain the compressor discharge saturation temperature according to matching of the discharge pressure of the compressor with a pressure-temperature meter of the refrigerant, where the pressure-temperature meter of the refrigerant may be obtained through a refrigerant data manual or the like. The outlet temperature of the domestic hot water heat exchanger can be detected by a fourth temperature sensor as shown in fig. 1.
In some embodiments of the present application, determining a target output frequency of a compressor in a heat pump unit based on a degree of subcooling includes: determining a target supercooling degree threshold range corresponding to the supercooling degree; determining a compressor frequency adjustment parameter corresponding to the target supercooling degree threshold range from a preset compressor frequency mapping table according to the target supercooling degree threshold range; and calculating the target output frequency of the compressor in the current operation period based on the compressor frequency adjustment parameter and the historical output frequency of the compressor in the previous operation period, wherein if the current operation period is the initial operation period, the initial output frequency of the compressor is used as the target output frequency.
In some embodiments, the heat pump assembly may calculate the target output frequency of the compressor as follows: acquiring an initial output frequency of a compressor; according to the following formula F K ＝F K-1 +A Compressor frequency adjustment parameters Calculating the target output frequency of the compressor in the current operation period; wherein K is more than or equal to 1, K represents the current operation period, F K Representing the target output frequency of the compressor at the current operating cycle, the operating cycle may be custom set, for example, to 30 seconds. F (F) K-1 For the historical output frequency of the compressor in the previous operation period of the current operation period, when k=1, F K-1 Is F 0 ，F 0 Representing the initial output frequency. A is that Compressor frequency adjustment parameters Representing compressor frequency adjustment parameters based on heatSupercooling degree determination A of domestic hot water heat exchanger in pump unit Compressor frequency adjustment parameters . The target output frequency of the compressor is determined based on the supercooling degree, so that the influence on the performance of the heat pump unit caused by the excessively high or excessively low supercooling degree of the heat pump unit can be avoided, and the heat pump unit is unstable.
In some embodiments, the compressor frequency adjustment parameter A of the compressor in the heat pump unit is determined based on the degree of supercooling Compressor frequency adjustment parameters In the process of (1), the heat pump unit may preset a plurality of groups of supercooling degree threshold ranges, and establish a preset compressor frequency mapping table (for example, as shown in table 1 below) containing the correspondence between the supercooling degree threshold ranges and the compressor frequency adjustment parameters. And then the heat pump unit can acquire the supercooling degree of the heat pump unit, and a target supercooling degree threshold range corresponding to the supercooling degree is determined from a preset compressor frequency mapping table according to the supercooling degree of the heat pump unit. And determining a target compressor frequency adjustment parameter corresponding to the target supercooling degree threshold range according to the corresponding relation between the supercooling degree threshold range and the compressor frequency adjustment parameter in a preset compressor frequency mapping table.
In some embodiments, the target output frequency F of the compressor is the current operating period is the initial operating period, i.e., k=1 K ＝F K-1 ＝F 0 I.e. the initial output frequency.
As an example, as shown in Table 1 below, DSC represents the supercooling degree of the heat pump unit, and when it is determined that the target supercooling degree threshold range corresponding to the supercooling degree of the heat pump unit is a2 < DSC less than or equal to a1 ℃, the compressor frequency adjustment parameter b0 can be determined according to the correspondence between the supercooling degree threshold range and the compressor frequency adjustment parameter in Table 1, and at this time, the target output frequency F of the compressor in the current operation period K Equal to the historical output frequency F K-1 +b0。
TABLE 1
In some embodiments, the parameters a0, a1, a2, a3, a4, b0, b1, b2 in table 1 are all greater than or equal to zero.
S13: the compressor is controlled to operate at a target output frequency.
In some embodiments, after the heat pump unit determines the target output frequency of the compressor, the compressor may be controlled to operate at the target output frequency. The target output frequencies of the compressors in the heat pump units may be different in different operation periods, and the performance of the heat pump units can be improved by determining the output frequency of the compressors based on the supercooling degree and controlling and adjusting the output frequency of the compressors, so that the stable operation of the heat pump units is ensured.
In some embodiments, to avoid overload of the heat pump unit caused by continuous operation of the heat pump unit, after the compressor is controlled to operate according to the target output frequency, the heat pump unit may further determine whether the domestic hot water provided by the heat pump unit meets the domestic hot water requirement. When the domestic hot water provided by the heat pump unit meets the domestic hot water requirement, the heat pump unit can be controlled to stop running so as to avoid overload of the heat pump unit and unnecessary energy consumption.
In some embodiments of the present application, after the control compressor operates according to the target output frequency, the heat pump unit may continuously monitor the hot water inlet temperature, the hot water outlet temperature, the high-pressure corresponding saturation temperature, etc. in the heat pump unit, so as to determine whether the domestic hot water prepared by the heat pump unit meets the domestic hot water mode requirement. Specifically: when any one of the following conditions is met, determining that domestic hot water prepared by the heat pump unit can meet the domestic hot water mode requirement: in the first duration, the hot water outlet temperature of the heat pump unit is higher than the highest heating outlet temperature of the heat pump unit; in the second time period, the inlet temperature of the hot water is higher than the difference value between the highest heating outlet temperature and the first temperature parameter; and in the third time period, the high-pressure corresponding saturation temperature of the heat pump unit is higher than the sum of the highest heating water outlet temperature and the second temperature parameter.
In some embodiments, as shown in the example diagram of the operation of the refrigerant in the domestic hot water mode shown in fig. 1, the heat pump unit may detect the hot water inlet temperature of the heat pump unit through the second temperature sensor; and detecting the hot water outlet temperature of the heat pump unit through a third temperature sensor. In some embodiments, the first temperature parameter, the second temperature parameter, the first time period, the second time period, and the third time period may be all set in a customized manner. For example, the first temperature parameter may take 3 ℃, the second temperature parameter may take 2.5 ℃, the first time period may take 3 seconds, the second time period may take 10 seconds, and the third time period may take 3 seconds.
In some embodiments, when determining whether the domestic hot water prepared by the heat pump unit meets the domestic hot water mode requirement, the heat pump unit can stop running, so that unnecessary energy consumption is avoided, running cost is saved, and service life of the heat pump unit is prolonged.
In some embodiments, if none of the above conditions is satisfied, it indicates that the domestic hot water prepared in the preparation and operation process of the heat pump unit cannot satisfy the needs of the user yet, and the domestic hot water mode needs to be continuously operated.
In some embodiments of the present application, if it is determined that the hot water temperature of the heat pump unit is less than the third temperature threshold, the heat pump unit is controlled to enable the electric heating mode, until the hot water temperature is greater than or equal to the highest heating water outlet temperature of the heat pump unit, the heat pump unit may be controlled to disable the electric heating mode.
It should be noted that, the electric heating mode mainly means that the electric auxiliary heater is arranged in the domestic hot water tank to assist in accelerating the speed of producing domestic hot water, the electric auxiliary heater can be a PTC electric heating rod or a nanotube heating rod, and the electric auxiliary heater is added to the domestic hot water tank through the domestic hot water heat exchanger to quickly supplement heat energy in the domestic hot water tank, so as to realize continuous supply of hot water.
In some embodiments, as shown in the example of the operation of the refrigerant in the domestic hot water mode shown in fig. 1, the heat pump unit may detect the hot water temperature of the heat pump unit through the first temperature sensor. The third temperature threshold may be custom set, for example, the third temperature threshold may be set to 45 ℃. The maximum heating water outlet temperature can be set to be 60 ℃.
As an example, please refer to fig. 3, which is an exemplary diagram illustrating an implementation principle of a control method of a heat pump unit according to an embodiment of the present application. As shown in fig. 3, the highest heating water outlet temperature may be set to 60 ℃, the third temperature threshold may be set to 45 ℃, and the heat pump unit controls the heat pump unit to start the domestic hot water mode to perform the preparation process of the domestic hot water, when the hot water temperature reaches 60 ℃, it indicates that the domestic hot water prepared by the heat pump unit can meet the domestic hot water mode requirement, and at this time, the heat pump unit can be controlled to stop running. When the hot water temperature is lower than 48 ℃ and the life hot water mode is still in need, the heat pump unit can be controlled to operate in the life hot water mode until the hot water temperature reaches 60 ℃ and the life hot water mode is required, and the heat pump unit can be controlled to stop operating. When the temperature of the hot water is lower than 45 ℃, the temperature of the hot water is too low, the heat pump unit can start an electric heating mode for rapidly supplementing the heat energy in the domestic hot water tank, and the heat pump unit can close the electric heating mode when the domestic hot water is prepared by the electric auxiliary heater until the temperature of the hot water reaches 60 ℃ and the domestic hot water mode requirement can be met.
In other embodiments, the heat pump unit may enable the electric heating mode in controlling the heat pump unit to enable the domestic hot water mode to perform the preparation of the domestic hot water, so as to improve the efficiency of preparing the domestic hot water.
In the control method of the heat pump unit, when the heat pump unit determines that the operation mode is the domestic hot water mode, before the heat pump unit is controlled to prepare the domestic hot water, whether the heat pump unit has a starting requirement or not is firstly determined, namely whether the heat pump unit needs to be started to meet the domestic hot water requirement or not is determined, and when the heat pump unit is determined to have the starting requirement, the heat pump unit is controlled to start to operate so as to prepare the domestic hot water; secondly, when the heat pump unit operates in the living hot water mode, the supercooling degree is controlled in a reasonable range by controlling the output frequency of the compressor, so that the heat of the refrigerant output by the compressor is fully absorbed in the living hot water mode, and the energy efficiency of the heat pump unit is improved. According to the embodiment of the application, the heat pump unit is controlled, so that the working efficiency and the energy efficiency of the heat pump unit are effectively improved.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
In one embodiment of the present application, a control device 200 of a heat pump unit is provided, where the heat pump unit includes a domestic hot water heat exchanger, and the functions that can be implemented by the control device 200 of the heat pump unit correspond to the control method of the heat pump unit in the foregoing embodiment one by one. As shown in fig. 4, the control device 200 of the heat pump unit includes: a judging module 201, configured to determine whether a start-up requirement exists for the heat pump unit when the operation mode of the heat pump unit is determined to be a domestic hot water mode; the determining module 202 is configured to obtain a supercooling degree of the domestic hot water heat exchanger if it is determined that the heat pump unit has a start-up requirement, and determine a target output frequency of a compressor in the heat pump unit based on the supercooling degree; and a control module 203 for controlling the compressor to operate at the target output frequency.
For specific limitation of the control device 200 of the heat pump unit, reference may be made to the limitation of the control method of the heat pump unit hereinabove, and the description thereof will not be repeated here. The respective modules in the control device 200 of the heat pump unit may be implemented in whole or in part by software, hardware, or a combination thereof. The above modules can be embedded in hardware or independent of a processor or a controller in the heat pump unit, or can be stored in a memory in the heat pump unit in software, so that the processor or the controller can call and execute the operations corresponding to the above modules.
Fig. 5 is a schematic structural diagram of a heat pump unit according to an embodiment of the present application. The heat pump unit 100 can be applied to application scenes such as air conditioners, heating systems and the like. The network on which the heat pump unit 100 is located includes, but is not limited to, the internet, a wide area network, a metropolitan area network, a local area network, a virtual private network (Virtual Private Network, VPN), and the like.
As shown in fig. 5, the heat pump unit 100 includes a communication module 101, a memory 102, a processor 103, an Input/Output (I/O) interface 104, and a bus 105. The processor 103 is coupled to the communication module 101, the memory 102, and the I/O interface 104, respectively, by a bus 105.
The communication module 101 may be a wireless communication module or a mobile communication module. The wireless communication module may provide solutions for wireless communication including wireless local area network (Wireless Local Area Networks, WLAN) (e.g., wireless fidelity (Wireless Fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (Global Navigation Satellite System, GNSS), frequency modulation (Frequency Modulation, FM), near field wireless communication technology (Near Field Communication, NFC), infrared technology (IR), etc., applied to the heat pump unit 100. The mobile communication module may provide a solution including 2G/3G/4G/5G wireless communication applied to the heat pump unit 100.
The Memory 102 may include one or more random access memories (Random Access Memory, RAM) and one or more Non-volatile memories (NVM). Random access memory may be read directly from and written to by processor 103, may be used to store executable programs (e.g., machine instructions) for an operating system or other on-the-fly programs, may also be used to store data for users and applications, and the like. The Random access memory may include Static Random-access memory (SRAM), dynamic Random-access memory (DRAM), synchronous Dynamic Random-access memory (Synchronous Dynamic Random-access memory (SDRAM), double data rate synchronous Dynamic Random-access memory (Double Data Rate Synchronous Dynamic Random-access memory, DDR SDRAM, such as fifth generation DDR SDRAM is generally referred to as DDR5 SDRAM), and the like.
The nonvolatile memory may store executable programs, store data of users and applications, and the like, and may be loaded into the random access memory in advance for the processor 103 to directly read and write. The nonvolatile memory may include a disk storage device, a flash memory (flash memory).
The memory 102 is used to store one or more computer programs. One or more computer programs are configured to be executed by the processor 103. The one or more computer programs include a plurality of instructions that, when executed by the processor 103, implement a method of controlling a heat pump unit executing on the heat pump unit 100.
In other embodiments, the heat pump unit 100 further includes an external memory interface, which is used to connect to an external memory, so as to implement expansion of the storage capability of the heat pump unit 100.
The processor 103 may include one or more processing units, such as: the processor 103 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and/or a neural network processor (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.
The processor 103 provides computing and control capabilities, for example, the processor 103 is configured to execute computer programs stored in the memory 102 to implement the heat pump unit control method described above.
The I/O interface 104 is used to provide a channel for user input or output, e.g., the I/O interface 104 may be used to connect various input/output devices, e.g., a mouse, keyboard, touch device, display screen, etc., so that a user may enter information, or visualize information.
The bus 105 is at least used to provide a channel for communication between the communication module 101, the memory 102, the processor 103, and the I/O interface 104 in the heat pump unit 100.
It should be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the heat pump unit 100. In other embodiments of the present application, heat pump assembly 100 may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
The embodiment of the application also provides a computer readable storage medium, and a computer program is stored on the computer readable storage medium, wherein the computer program comprises program instructions, and a method implemented by the program instructions when being executed can refer to the control method of the heat pump unit in each embodiment of the application.
The computer readable storage medium may be an internal memory of the heat pump unit according to the above embodiment, for example, a hard disk or a memory of the heat pump unit. The computer readable storage medium may also be an external storage device of the heat pump unit, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the heat pump unit.
Further, the computer-readable storage medium may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the heat pump unit, etc.
Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.
Claims (10)
1. A control method of a heat pump unit, the heat pump unit including a domestic hot water heat exchanger, the control method comprising:
When the operation mode of the heat pump unit is a domestic hot water mode, determining whether the heat pump unit has a starting-up requirement or not;
if the heat pump unit is determined to have a starting requirement, acquiring the supercooling degree of the domestic hot water heat exchanger, and determining the target output frequency of a compressor in the heat pump unit based on the supercooling degree;
and controlling the compressor to operate according to the target output frequency.
2. The control method of claim 1, wherein the determining whether a start-up requirement exists for the heat pump unit comprises:
acquiring the hot water temperature and the hot water inlet temperature of the heat pump unit;
and if the hot water temperature and the hot water inlet temperature are determined to meet the preset conditions, determining that the heat pump unit has a starting requirement.
3. The control method according to claim 2, wherein said determining that both the hot water temperature and the hot water inlet temperature satisfy a preset condition comprises:
if the hot water temperature is determined to be lower than a first temperature threshold, the hot water inlet temperature is determined to be lower than a second temperature threshold, and the hot water inlet temperature is determined to be lower than a difference value between the highest heating outlet temperature of the heat pump unit and a preset temperature parameter, the hot water temperature and the hot water inlet temperature are determined to meet the preset condition.
4. The control method according to claim 1, wherein the determining the target output frequency of the compressor in the heat pump unit based on the supercooling degree includes:
determining a target supercooling degree threshold range corresponding to the supercooling degree;
determining a compressor frequency adjustment parameter corresponding to the target supercooling degree threshold range from a preset compressor frequency mapping table according to the target supercooling degree threshold range;
and calculating the target output frequency of the compressor in the current operation period based on the compressor frequency adjustment parameter and the historical output frequency of the compressor in the previous operation period, wherein if the current operation period is an initial operation period, the initial output frequency of the compressor is used as the target output frequency.
5. The control method of claim 1, wherein after the control of the compressor to operate at the target output frequency, the control method further comprises:
determining whether the heat pump unit meets the domestic hot water mode requirement;
and if the heat pump unit is determined to meet the domestic hot water mode requirement, controlling the heat pump unit to stop running.
6. The control method of claim 5, wherein the determining whether the heat pump unit meets domestic hot water mode requirements comprises:
If any one of the following conditions is met, determining that the heat pump unit meets the domestic hot water mode requirement:
in a first duration, the hot water outlet temperature of the heat pump unit is higher than the highest heating outlet temperature of the heat pump unit;
in the second time period, the hot water inlet temperature of the heat pump unit is higher than the difference value between the highest heating outlet temperature and the first temperature parameter;
and in the third time period, the high-pressure corresponding saturation temperature of the heat pump unit is higher than the sum of the highest heating water outlet temperature and the second temperature parameter.
7. The control method according to claim 1, characterized in that the control method further comprises:
and if the hot water temperature of the heat pump unit is determined to be lower than a third temperature threshold, controlling the heat pump unit to start an electric heating mode, and closing the electric heating mode until the hot water temperature is higher than or equal to the highest heating water outlet temperature of the heat pump unit.
8. A control device of a heat pump unit, the heat pump unit comprising a domestic hot water heat exchanger, characterized in that the control device comprises:
the judging module is used for determining whether the heat pump unit has a starting requirement or not when the operation mode of the heat pump unit is determined to be a domestic hot water mode;
The determining module is used for acquiring the supercooling degree of the domestic hot water heat exchanger and determining the target output frequency of the compressor in the heat pump unit based on the supercooling degree if the heat pump unit is determined to have a starting requirement;
and the control module is used for controlling the compressor to run according to the target output frequency.
9. A heat pump assembly comprising a memory, a processor and computer readable instructions stored in the memory and executable on the processor, wherein the computer readable instructions when executed by the processor implement a method of controlling a heat pump assembly according to any one of claims 1 to 7.
10. A computer readable storage medium storing computer readable instructions which, when executed by a processor, implement a method of controlling a heat pump unit according to any one of claims 1 to 7.
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| CN202311485352.6A CN117308432A (en) | 2023-11-08 | 2023-11-08 | Control method and device of heat pump unit, heat pump unit and storage medium |
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