CN114234468A - Heat pump device control method, device, unit, computer equipment and storage medium - Google Patents
Heat pump device control method, device, unit, computer equipment and storage medium Download PDFInfo
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- CN114234468A CN114234468A CN202111539654.8A CN202111539654A CN114234468A CN 114234468 A CN114234468 A CN 114234468A CN 202111539654 A CN202111539654 A CN 202111539654A CN 114234468 A CN114234468 A CN 114234468A
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to the technical field of heat pump units, and particularly discloses a heat pump device control method, a heat pump device control device, a heat pump unit, computer equipment and a storage medium. The method comprises the steps of obtaining a first output water temperature of a hot water heat exchanger in the heat pump unit and a second output water temperature of a hollow heat exchanger in the heat pump unit; when the first output water temperature is greater than or equal to a first preset threshold value and the second output water temperature reaches a second preset threshold value, reducing the rated frequency of the compressor to the valve switching frequency; switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in a heat pump unit so as to enable the air-conditioning heat exchanger and the outdoor unit to be in the same refrigerant loop; when the first output water temperature is smaller than or equal to a third preset threshold and the first fault information indicates normal, reducing the rated frequency of the compressor to the valve switching frequency; and the four-way valve is switched to communicate the hot water heat exchanger and the air-conditioning heat exchanger so that the hot water heat exchanger and the air-conditioning heat exchanger are in the same refrigerant loop. The heat pump device control method of the invention does not need to stop, can automatically switch and has high switching efficiency.
Description
Technical Field
The present disclosure relates to the field of heat pump unit technologies, and in particular, to a heat pump unit control method, a heat pump unit control device, a heat pump unit, a computer device, and a storage medium.
Background
The heat pump unit is a device for transferring heat energy of a low-level heat source to a high-level heat source, an evaporator of the heat pump unit is arranged in an air conditioner and is applied to air conditioner refrigeration, a condenser of the heat pump unit can be arranged in a water heater and is applied to water heater heating, and switching of different working modes can be achieved by selectively switching off the air conditioner or selectively switching off the water heater or not switching off the water heater.
The mode switching mode of the existing heat pump unit is manually switched, the heat pump unit needs to be switched after being shut down, when the system is relatively stable, the heat pump unit is restarted to operate a target mode, time is consumed for waiting for the system to be stable, and meanwhile, the air-conditioning refrigeration and hot water production effects and the working efficiency of the heat pump unit can be influenced.
Disclosure of Invention
The embodiment of the invention aims to: provided are a heat pump device control method, device, unit, computer equipment, and storage medium, which can solve the above-mentioned problems in the prior art.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect, a heat pump apparatus control method is provided, including:
acquiring a first output water temperature of a hot water heat exchanger in a heat pump unit and a second output water temperature of a hollow heat exchanger in the heat pump unit;
when the first output water temperature is greater than or equal to a first preset threshold value and the second output water temperature reaches a second preset threshold value, reducing the rated frequency of the compressor to the valve switching frequency;
switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit so as to enable the air-conditioning heat exchanger and the outdoor unit to be in the same refrigerant loop;
when the first output water temperature is smaller than or equal to a third preset threshold and the first fault information indicates normal, reducing the rated frequency of the compressor to the valve switching frequency;
and switching a four-way valve to communicate the hot water heat exchanger and the air-conditioning heat exchanger so as to enable the hot water heat exchanger and the air-conditioning heat exchanger to be in the same refrigerant loop.
As a preferable aspect of the heat pump apparatus control method, the method further includes:
acquiring first fault information of a hot water heat exchanger in a heat pump unit and second fault information of an air conditioner heat exchanger;
when the first fault information indicates a fault, the second output water temperature reaches the second preset threshold value, and the second fault information indicates normal, reducing the rated frequency of the compressor to the valve switching frequency;
and switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit.
As a preferable aspect of the heat pump apparatus control method, when the first failure information indicates a failure, the method includes:
timing and recording a first timing duration after the first fault information indicates a fault; and if the first timing duration reaches a first duration threshold, the first fault information still indicates the fault.
As a preferable aspect of the heat pump apparatus control method, the switching four-way valve includes:
after the rated frequency of the compressor is reduced to the valve switching frequency, timing and recording a second timing duration;
and when the second timing duration reaches a second duration threshold value, switching the four-way valve.
As a preferable aspect of the heat pump apparatus control method, the method further includes:
and after the four-way valve is switched, the valve switching frequency of the compressor is increased to the rated frequency.
As a preferable aspect of the heat pump apparatus control method, the increasing the valve switching frequency of the compressor to the rated frequency after switching the four-way valve includes:
after the four-way valve is switched, timing and recording the third timing length;
and when the third timing duration reaches a third duration threshold, increasing the valve switching frequency of the compressor to the rated frequency.
As a preferable aspect of the heat pump apparatus control method, the method further includes:
and after the rated frequency of the compressor is reduced to the valve cutting frequency, the fan of the outdoor unit is started.
As a preferable aspect of the heat pump apparatus control method, the method further includes:
and after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, the fan is closed.
As a preferable scheme of the heat pump device control method, switching the four-way valve to communicate the hot water heat exchanger and the air conditioner heat exchanger and then turning off the fan includes:
after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, timing and recording a fourth timing duration;
and when the fourth timing duration reaches a fourth duration threshold, closing the fan.
As a preferable aspect of the heat pump apparatus control method, the method further includes:
and after the four-way valve is switched to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit, the circulating water pump of the hot water heat exchanger is closed.
As a preferable aspect of the heat pump apparatus control method, the method further includes:
and after the rated frequency of the compressor is reduced to the valve cutting frequency next time, starting a circulating water pump of the hot water heat exchanger.
As a preferred embodiment of the method for controlling a heat pump apparatus, the method for switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit of the heat pump unit and then turning off a circulating water pump of the hot water heat exchanger includes:
switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit, timing and recording a fifth timing duration;
and when the fifth timing duration reaches a fifth duration threshold, closing the circulating water pump of the hot water heat exchanger.
In a second aspect, there is provided a heat pump apparatus control apparatus comprising:
the acquisition module is used for acquiring a first output water temperature of a hot water heat exchanger in a heat pump unit and a second output water temperature of a hollow heat exchange device in the heat pump unit;
the frequency modulation module is used for reducing the rated frequency of the compressor to the valve switching frequency when the first output water temperature is greater than or equal to a first preset threshold value and the second output water temperature reaches a second preset threshold value;
the switching module is used for switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit so as to enable the air-conditioning heat exchanger and the outdoor unit to be in the same refrigerant loop;
the frequency modulation module is further used for reducing the rated frequency of the compressor to the valve switching frequency when the first output water temperature is smaller than or equal to a third preset threshold and the first fault information indicates normal, so that the hot water heat exchanger and the air conditioner heat exchanger are in the same refrigerant loop;
the switching module is also used for switching a four-way valve to communicate the hot water heat exchanger and the air conditioner heat exchanger.
The third aspect provides a heat pump unit, which comprises a compressor, a four-way valve, a hot water heat exchanger, an air conditioner heat exchanger, an outdoor unit and an electronic expansion valve, wherein the output end of the compressor is connected with the first end of the four-way valve, the second end, the third end and the fourth end of the four-way valve are respectively connected with the input end of the hot water heat exchanger, the output end of the outdoor unit and the input end of the compressor, the fourth end is further connected with the input end of the air conditioner heat exchanger, the electronic expansion valve is communicated between the output end of the air conditioner heat exchanger and the input end of the outdoor unit, and the four-way valve is switched to be capable of communicating the air conditioner heat exchanger with the outdoor unit or communicating the hot water heat exchanger with the air conditioner heat exchanger.
In a fourth aspect, there is provided a computer device comprising: a memory and one or more processors;
the memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the heat pump apparatus control method.
In a fifth aspect, there is provided a storage medium containing computer-executable instructions which, when executed by a computer processor, are operable to perform the heat pump apparatus control method.
The beneficial effect of this application does:
1) whether the output water temperature of the hot water heat exchanger reaches the target temperature or not is judged by obtaining the first output water temperature of the hot water heat exchanger in the heat pump unit, and similarly, whether the output water temperature of the air conditioner heat exchanger reaches the target temperature or not can be judged by obtaining the second output water temperature of the air conditioner heat exchanger in the heat pump unit. When the first output water temperature is greater than or equal to a first preset threshold value, the output water temperature of the hot water heat exchanger is proved to reach the target temperature, and heating is not needed any more; when the second output water temperature reaches a second preset threshold value, the output water temperature of the air-conditioning heat exchanger is higher than the target temperature, and refrigeration is needed; by combining the above conditions, it can be considered that the heat pump unit needs to stop the hot water heating mode at this time and switch to the refrigeration mode to ensure the refrigeration capacity. At the moment, the rated frequency of the compressor is reduced to the valve switching frequency, the working output of the compressor is ensured as much as possible, meanwhile, the impact vibration to a refrigerant pipeline is reduced, and the four-way valve is convenient to switch. After the frequency of the compressor is reduced to the valve switching frequency, the four-way valve can be switched to communicate the air-conditioning heat exchanger and the outdoor unit, so that the air-conditioning heat exchanger and the outdoor unit are respectively used as a condenser and an evaporator of the heat pump unit, namely, the heat pump unit is switched from a refrigeration and water heating mode to a refrigeration mode.
2) When the first output water temperature is smaller than or equal to the third preset threshold value, it is indicated that the output water temperature of the hot water heat exchanger is insufficient, heating is needed, at this time, the rated frequency of the compressor is reduced to the valve switching frequency, or impact vibration to a refrigerant pipeline is reduced, then the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, so that the hot water heat exchanger and the air conditioner heat exchanger are respectively used as a condenser and an evaporator of the heat pump unit, namely, the heat pump unit is switched to a cooling and heating water mode from a cooling mode.
3) According to the control method of the heat pump device, when a user sets a refrigeration and hot water heating mode or a refrigeration mode for the heat pump unit to operate, when the hot water heating mode meets a shutdown condition, the heat pump unit can be automatically switched to the refrigeration mode from the refrigeration and hot water heating mode. Similarly, when the hot water making mode meets the starting condition, the heat pump unit can be automatically switched to the cooling and hot water making mode from the cooling mode. The application has the advantages that the switching process does not need to be stopped, so that the performance of the heat pump unit is ensured, and the refrigerant consumption when the shutdown condition is maintained is reduced.
Therefore, the heat pump device control method is high in switching efficiency, and the effects of air conditioning refrigeration and water heating of the heat pump unit and the working efficiency are also prevented from being influenced.
Drawings
The present application will be described in further detail below with reference to the accompanying drawings and examples.
Fig. 1 is a schematic structural diagram of a heat pump unit provided in an embodiment of the present application.
Fig. 2 is a flowchart of a heat pump apparatus control method according to an embodiment of the present disclosure.
Fig. 3 is a timing chart of a heat pump apparatus control method according to another embodiment of the present application.
Fig. 4 is a schematic structural diagram of a heat pump apparatus control device according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a computer device according to an embodiment of the present application.
In the figure:
41. an acquisition module; 42. a frequency modulation module; 43. a switching module; 44. an opening and closing module;
51. a processor; 52. a memory; 53. an input device; 54. and an output device.
Detailed Description
In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present application clearer, the following describes technical solutions of embodiments of the present application in further detail, and it is obvious that the described embodiments are only a part of embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1, the present application provides a heat pump unit, which comprises a compressor, a four-way valve, a hot water heat exchanger, an air conditioner heat exchanger, an outdoor unit and an electronic expansion valve, a first end (D end) of the four-way valve is connected to the output end of the compressor, a second end (C end) of the four-way valve, a third end (S end) and a fourth end (E end) are respectively connected to the input end of the hot water heat exchanger, the output end of the outdoor unit and the input end of the compressor, the input end of the air conditioner heat exchanger is further connected to the fourth end, the electronic expansion valve is communicated between the output end of the air conditioner heat exchanger and the input end of the outdoor unit, the switching four-way valve can be communicated with the air conditioner heat exchanger and the outdoor unit, or communicated with the hot water heat exchanger and the air conditioner heat exchanger.
By changing the flow direction of the first end (D end) in the four-way valve, such as: the first end (D end) of the switching four-way valve is communicated with the fourth end (E end), then the refrigerant conveyed by the output end of the compressor flows to the outdoor unit (as an evaporator) for heat exchange, the refrigerant after heat dissipation and temperature reduction enters the air-conditioning heat exchanger (as a condenser) for cold output after being throttled by the electronic expansion valve, air-conditioning refrigeration is realized, the refrigerant output by the air-conditioning heat exchanger directly returns to the input end of the compressor, and the next heat exchange cycle is continued. Similarly, if first end (D end) is switched to communicate with second end (C end), then the refrigerant that the compressor output was carried can be to hot water heat exchanger (as the evaporimeter) output heat, hot water heat exchanger can export hot water, refrigerant after the heat transfer gets into air conditioner heat exchanger (as the condenser) heat transfer after the electronic expansion valve throttle, to air conditioner heat exchanger output cold volume realization refrigeration, the refrigerant after the air conditioner heat exchanger heat transfer finishes directly gets back to the input of compressor, continue the heat transfer circulation of next time.
Through the switching of the four-way valve, the air-conditioning heat exchanger and the outdoor unit are in the same refrigerant loop, the air-conditioning heat exchanger and the outdoor unit are respectively used as a condenser and an evaporator of the heat pump unit, and the heat pump unit operates in a refrigeration mode.
And enabling the hot water heat exchanger and the air conditioner heat exchanger to be in the same refrigerant loop, enabling the hot water heat exchanger and the air conditioner heat exchanger to be respectively used as a condenser and an evaporator of a heat pump unit, and enabling the heat pump unit to operate a refrigeration and heating water mode.
Therefore, the heat pump unit can realize the mode switching of simultaneous refrigeration and hot water or single air-conditioning refrigeration without stopping the machine, and also reduces the influence on the air-conditioning refrigeration and hot water production effects and the working efficiency of the heat pump unit.
As shown in fig. 2, the present embodiment further provides a heat pump apparatus control method applied to a heat pump unit, including:
s101, acquiring a first output water temperature of a hot water heat exchanger in a heat pump unit and a second output water temperature of a hollow heat exchanger in the heat pump unit;
s102, when the first output water temperature is larger than or equal to a first preset threshold and the second output water temperature reaches a second preset threshold, reducing the rated frequency of the compressor to the valve switching frequency;
s103, switching a four-way valve to communicate an air conditioner heat exchanger and an outdoor unit in a heat pump unit, wherein the air conditioner heat exchanger and the outdoor unit are in the same refrigerant loop;
s104, when the first output water temperature is smaller than or equal to a third preset threshold value, reducing the rated frequency of the compressor to the valve switching frequency so that the hot water heat exchanger and the air conditioner heat exchanger are in the same refrigerant loop;
and S105, switching the four-way valve to communicate the hot water heat exchanger with the air conditioner heat exchanger.
Whether the output water temperature of the hot water heat exchanger reaches the target temperature or not is judged by obtaining the first output water temperature of the hot water heat exchanger in the heat pump unit, and similarly, whether the output water temperature of the air conditioner heat exchanger reaches the target temperature or not can be judged by obtaining the second output water temperature of the air conditioner heat exchanger in the heat pump unit. When the first output water temperature is greater than or equal to a first preset threshold value, the output water temperature of the hot water heat exchanger is proved to reach the target temperature, and heating is not needed any more; when the second output water temperature reaches a second preset threshold value, the output water temperature of the air-conditioning heat exchanger is higher than the target temperature, and refrigeration is needed; by combining the above conditions, it can be considered that the heat pump unit needs to stop the hot water heating mode at this time and switch to the refrigeration mode to ensure the refrigeration capacity. At the moment, the rated frequency of the compressor is reduced to the valve switching frequency, the working output of the compressor is ensured as much as possible, meanwhile, the impact vibration to a refrigerant pipeline is reduced, and the four-way valve is convenient to switch. After the frequency of the compressor is reduced to the valve switching frequency, the four-way valve can be switched to communicate the air-conditioning heat exchanger and the outdoor unit, so that the air-conditioning heat exchanger and the outdoor unit are respectively used as a condenser and an evaporator of the heat pump unit, namely, the heat pump unit is switched from a refrigeration and water heating mode to a refrigeration mode.
In addition, when the first output water temperature is smaller than or equal to a third preset threshold value, the output water temperature of the hot water heat exchanger is insufficient, heating is needed, at the moment, the rated frequency of the compressor is reduced to the valve switching frequency, impact vibration to a refrigerant pipeline can also be reduced, then the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, the hot water heat exchanger and the air conditioner heat exchanger are respectively used as a condenser and an evaporator of the heat pump unit, and the heat pump unit is switched to a cooling and heating water mode from the cooling mode.
Therefore, the heat pump device control method can automatically switch the cooling and heating water mode and the cooling mode of the heat pump unit, does not need to stop, has high switching efficiency, and avoids influencing the air-conditioning cooling and heating water effects and the working efficiency of the heat pump unit.
In one embodiment, the heat pump apparatus control method of the present application further includes:
acquiring first fault information of a hot water heat exchanger in a heat pump unit and second fault information of an air conditioner heat exchanger;
when the first fault information indicates a fault, the second output water temperature reaches a second preset threshold value, and the second fault information indicates normal, namely the hot water heat exchanger has a fault, the heating cannot be carried out; the output water temperature of the air-conditioning heat exchanger also reaches the target temperature and needs to be refrigerated; meanwhile, the air conditioner heat exchanger has no fault, and the rated frequency of the compressor can be reduced to the valve switching frequency;
after the frequency of the compressor is reduced to the valve switching frequency, the four-way valve can be switched to communicate the air-conditioning heat exchanger with the outdoor unit, so that the air-conditioning heat exchanger and the outdoor unit are respectively used as a condenser and an evaporator of the heat pump unit, and the heat pump unit is switched from a refrigeration and hot water production mode to a refrigeration mode.
Optionally, when both the first fault information and the second fault information indicate normal, it indicates that both the air-conditioning heat exchanger and the hot water heat exchanger are not in a fault state and can work normally; the combination that the first output water temperature is larger than or equal to a first preset threshold value and the second output water temperature reaches a second preset threshold value indicates that the output water temperature of the hot water heat exchanger reaches the target temperature, heating is not needed any more, and the output water temperature of the air-conditioning heat exchanger is higher than the target temperature and refrigeration is needed; the heat pump unit needs to stop the hot water heating mode at the moment, and is switched to the refrigeration mode to ensure the refrigeration capacity.
Meanwhile, when the first fault information indicates normal, the hot water heat exchanger is not in a fault state and can work normally, and at the moment, the rated frequency of the compressor is reduced to the valve switching frequency, so that the impact vibration to the refrigerant pipeline can be reduced.
Preferably, the compressor has a cut-off frequency in the range of 35 to 50 hertz and a nominal operating frequency of 60 to 70 hertz.
Further, the heat pump apparatus control method according to the present application, wherein the step condition when the first failure information indicates a failure, includes:
timing and recording a first timing duration after the first fault information indicates the fault;
if the first timing duration reaches the first timing duration threshold and the first fault information still indicates a fault, the fault of the hot water heat exchanger can be considered as incapable of self-repairing and not misjudged, and at the moment, subsequent operation can be performed.
In another embodiment, the step of switching the four-way valve in the heat pump apparatus control method of the present application includes:
after the rated frequency of the compressor is reduced to the valve switching frequency, timing and recording a second timing duration;
when the second timing duration reaches the second duration threshold, the compressor is indicated to work stably in the valve switching frequency, and the original output refrigerant in the pipeline has undergone at least one cycle, so that the original output refrigerant is fully exchanged, and the four-way valve can be switched smoothly and quickly.
In addition, the heat pump apparatus control method of the present application further includes:
after the four-way valve is switched, the valve switching frequency of the compressor is improved to the rated frequency, so that the compressor returns to the rated frequency in normal operation, and the output of the heat pump unit is ensured.
Preferably, in the heat pump apparatus control method of the present application, the step of increasing the valve switching frequency of the compressor to the rated frequency after switching the four-way valve includes:
after the four-way valve is switched, timing and recording the third timing length;
when the third timing duration reaches the third duration threshold, the switching of the four-way valve is completed and the heat pump unit also works stably, and at the moment, the valve switching frequency of the compressor can be increased to the rated frequency.
In another aspect, the heat pump apparatus control method of the present application further includes:
and after the rated frequency of the compressor is reduced to the valve cutting frequency, the fan of the outdoor unit is started. The fan is started before the four-way valve is switched, so that heat exchange between the refrigerant of the outdoor unit and air can be performed, the heat exchange rate between the air and the refrigerant is ensured, and after the four-way valve is switched, the refrigerant in the pipeline can directly enter the outdoor unit and directly perform heat exchange with the air, so that the working efficiency of the heat pump unit is improved.
Preferably, the heat pump apparatus control method of the present application further includes:
after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, namely after the refrigerant does not enter the outdoor unit, the fan of the outdoor unit can be turned off at the moment, so that the energy is saved, and the operation burden of the system is reduced.
More preferably, in the heat pump apparatus control method of the present application, the step of turning off the fan after switching the four-way valve to communicate the hot water heat exchanger and the air conditioner heat exchanger includes:
after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, timing and recording the fourth timing duration, and judging whether the heat pump unit works stably or not by comparing the fourth timing duration with the fourth duration threshold;
when the fourth timing duration reaches the fourth duration threshold, the heat pump unit is stable in operation, most of heat of the refrigerant in the hot water heat exchanger (condenser) is taken away by the fan, and the fan can be turned off at the moment, so that energy is saved.
Optionally, the heat pump apparatus control method of the present application further includes:
after the four-way valve is switched to communicate the air conditioner heat exchanger with an outdoor unit in the heat pump unit, namely after the refrigerant does not enter the hot water heat exchanger, the circulating water pump of the hot water heat exchanger is closed, and energy can be saved.
Further, the heat pump apparatus control method of the present application further includes:
after the rated frequency of the compressor is reduced to the valve switching frequency next time, namely before the four-way valve is prepared to be switched next time, the circulating water pump of the hot water heat exchanger is started in advance, so that the refrigerant in the hot water heat exchanger exchanges heat with water, and after the four-way valve is switched to communicate with the hot water heat exchanger, the heat in the high-temperature and high-pressure refrigerant can be directly output to the hot water heat exchanger.
Another further step, after switching the four-way valve to communicate the air conditioner heat exchanger with the outdoor unit in the heat pump unit, the step of turning off the circulating water pump of the hot water heat exchanger includes:
after the four-way valve is switched to communicate the air-conditioning heat exchanger with the outdoor unit, timing and recording a fifth timing duration, and judging whether the four-way valve is switched completely or not by comparing the fifth timing duration with a fifth duration threshold value;
when the fifth timing duration reaches the fifth duration threshold, the four-way valve is switched over, the heat pump unit performs normal refrigeration, the hot water heat exchanger does not participate in evaporation and condensation of the system, and the circulating water pump of the hot water heat exchanger is turned off at the moment, so that energy is saved.
In addition, referring to fig. 3, an embodiment of the present application further provides another heat pump apparatus control method, including:
s201, acquiring first fault information of a hot water heat exchanger in a heat pump unit, first output water temperature of the output water temperature, second fault information of a hollow heat exchanger of the heat pump unit and second output water temperature of the output water temperature;
s202, when the first output water temperature is larger than or equal to a first preset threshold value, the second output water temperature reaches a second preset threshold value, and the first fault information and the second fault information indicate normal, reducing the rated frequency of the compressor to the valve switching frequency, timing and recording the second timing duration, and starting a fan of the outdoor unit;
s203, when the second timing duration reaches a second duration threshold value, switching the four-way valve to communicate the air conditioner heat exchanger with an outdoor unit in the heat pump unit, timing and recording a third timing duration and a fifth timing duration;
s204, when the third timing duration reaches a third duration threshold, improving the valve switching frequency of the compressor to a rated frequency; when the fifth timing duration reaches a fifth duration threshold, closing a circulating water pump of the hot water heat exchanger;
s205, timing and recording a first timing duration after the first fault information indicates the fault, wherein if the first timing duration reaches a first duration threshold, the first fault information still indicates the fault; when the second output water temperature reaches a second preset threshold value and the second fault information indicates normal, reducing the rated frequency of the compressor to the valve switching frequency, and starting a fan of the outdoor unit;
s206, when the second timing duration reaches a second duration threshold value, switching the four-way valve to communicate the air conditioner heat exchanger with an outdoor unit in the heat pump unit, timing and recording a third timing duration and a fifth timing duration;
s207, when the third timing duration reaches a third duration threshold, improving the valve switching frequency of the compressor to a rated frequency; when the fifth timing duration reaches a fifth duration threshold, closing a circulating water pump of the hot water heat exchanger;
s208, when the first output water temperature is smaller than or equal to a third preset threshold and the first fault information indicates normal, reducing the rated frequency of the compressor to the valve switching frequency, starting a circulating water pump of the hot water heat exchanger, timing and recording a second timing duration;
s209, when the second timing duration reaches a second duration threshold, switching the four-way valve to communicate the hot water heat exchanger and the air conditioner heat exchanger, timing and recording a third timing duration and a fourth timing duration;
s210, when the third timing duration reaches a third duration threshold, improving the valve switching frequency of the compressor to a rated frequency; and when the fourth timing duration reaches a fourth duration threshold, the fan is closed.
The heat pump device control method in the embodiment can have the same steps and achieve the same effect as the heat pump device control method in the embodiment, can automatically switch the cooling and heating water mode and the cooling mode of the heat pump unit after the system runs stably, does not need to stop, has high switching efficiency, and also avoids influencing the air-conditioning cooling and heating water effect and the working efficiency of the heat pump unit.
Referring to fig. 4, the present application also provides a heat pump apparatus control apparatus including:
the acquiring module 41 is used for acquiring a first output water temperature of a hot water heat exchanger in a heat pump unit and a second output water temperature of a hollow heat exchanger in the heat pump unit;
the frequency modulation module 42 is configured to reduce the rated frequency of the compressor to a valve switching frequency when the first output water temperature is greater than or equal to a first preset threshold and the second output water temperature reaches a second preset threshold;
the switching module 43 is configured to switch a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit, so that the air-conditioning heat exchanger and the outdoor unit are in the same refrigerant loop;
the frequency modulation module 42 is further configured to reduce the rated frequency of the compressor to the valve switching frequency when the first output water temperature is less than or equal to a third preset threshold;
the switching module 43 is further configured to switch a four-way valve to communicate the hot water heat exchanger and the air conditioner heat exchanger, so that the hot water heat exchanger and the air conditioner heat exchanger are in the same refrigerant loop.
In the above, by obtaining the output water temperature of the hot water heat exchanger in the heat pump unit to determine whether the output water temperature of the hot water heat exchanger reaches the target temperature, and similarly, obtaining the second output water temperature of the air conditioner heat exchanger in the heat pump unit, it can also be determined whether the output water temperature of the air conditioner heat exchanger reaches the target temperature. When the first output water temperature is greater than or equal to a first preset threshold value, the output water temperature of the hot water heat exchanger is proved to reach the target temperature, and heating is not needed any more; when the second output water temperature reaches a second preset threshold value, the output water temperature of the air-conditioning heat exchanger is higher than the target temperature, and refrigeration is needed; by combining the above conditions, it can be considered that the heat pump unit needs to stop the hot water heating mode at this time and switch to the refrigeration mode to ensure the refrigeration capacity. At the moment, the rated frequency of the compressor is reduced to the valve switching frequency, the working output of the compressor is ensured as much as possible, meanwhile, the impact vibration to a refrigerant pipeline is reduced, and the four-way valve is convenient to switch. After the frequency of the compressor is reduced to the valve switching frequency, the four-way valve can be switched to communicate the air-conditioning heat exchanger and the outdoor unit, so that the air-conditioning heat exchanger and the outdoor unit are respectively used as a condenser and an evaporator of the heat pump unit, namely, the heat pump unit is switched from a refrigeration and water heating mode to a refrigeration mode.
In addition, when the first output water temperature is smaller than or equal to the third preset threshold value, the output water temperature of the hot water heat exchanger is insufficient, heating is needed, at the moment, the rated frequency of the compressor is reduced to the valve switching frequency, or impact vibration to a refrigerant pipeline is reduced, then the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, the hot water heat exchanger and the air conditioner heat exchanger are respectively used as a condenser and an evaporator of the heat pump unit, namely the heat pump unit is switched to a cooling and heating water mode from the cooling mode.
Therefore, the heat pump device control method can automatically switch the cooling and heating water mode and the cooling mode of the heat pump unit, does not need to stop, has high switching efficiency, and avoids influencing the air-conditioning cooling and heating water effects and the working efficiency of the heat pump unit.
In a possible embodiment, the obtaining module 41 is further configured to obtain first fault information of a hot water heat exchanger in the heat pump unit and second fault information of the air-conditioning heat exchanger;
the frequency modulation module 42 is further configured to reduce the rated frequency of the compressor to the valve switching frequency when the first fault information indicates a fault, the second output water temperature reaches the second preset threshold, and the second fault information indicates normal;
the switching module 43 is also used for switching a four-way valve to communicate the air conditioner heat exchanger with an outdoor unit in the heat pump unit.
In a possible embodiment, when the first fault information of the fm module 42 indicates a fault, the method specifically includes:
timing and recording a first timing duration after the first fault information indicates a fault; and if the first timing duration reaches a first duration threshold, the first fault information still indicates the fault.
In a possible embodiment, in the switching module 43, switching the four-way valve specifically includes:
after the rated frequency of the compressor is reduced to the valve switching frequency, timing and recording a second timing duration;
and when the second timing duration reaches a second duration threshold value, switching the four-way valve.
In one possible embodiment, the frequency modulation module 42 is further configured to increase the valve switching frequency of the compressor to the rated frequency after switching the four-way valve.
In a possible embodiment, in the frequency modulation module 42, after switching the four-way valve, increasing the valve switching frequency of the compressor to the rated frequency specifically includes:
after the four-way valve is switched, timing and recording the third timing length;
and when the third timing duration reaches a third duration threshold, increasing the valve switching frequency of the compressor to the rated frequency.
In one possible embodiment, the outdoor unit further comprises an on-off module 44, and the on-off module 44 is configured to turn on the fan of the outdoor unit after the rated frequency of the compressor is reduced to the valve-cutting frequency.
In one possible embodiment, the on-off module 44 is further configured to switch the four-way valve to connect the hot water heat exchanger and the air conditioner heat exchanger, and then turn off the fan.
In a possible embodiment, in the on-off module 44, after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, turning off the fan specifically includes:
after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, timing and recording a fourth timing duration;
and when the fourth timing duration reaches a fourth duration threshold, closing the fan.
In a possible embodiment, the on-off module 44 is further configured to switch the four-way valve to connect the air conditioner heat exchanger and an outdoor unit of the heat pump unit, and then turn off the circulating water pump of the hot water heat exchanger.
In one possible embodiment, the start/stop module 44 is further configured to start the circulating water pump of the hot water heat exchanger after the next reduction of the rated frequency of the compressor to the valve-cut frequency.
In a possible embodiment, in the start/stop module 44, after the four-way valve is switched to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit, the turning off the circulating water pump of the hot water heat exchanger specifically includes:
switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit, timing and recording a fifth timing duration;
and when the fifth timing duration reaches a fifth duration threshold, closing the circulating water pump of the hot water heat exchanger.
The heat pump apparatus control device in this embodiment may have the same steps and achieve the same effects as the heat pump apparatus control method in the above embodiment, and the details are not repeated in this embodiment.
In addition, the embodiment of the application also provides computer equipment which can integrate the heat pump device control device provided by the embodiment of the application. Fig. 5 is a schematic structural diagram of a computer device according to an embodiment of the present application. Referring to fig. 5, the computer apparatus includes: an input device 53, an output device 54, a memory 52, and one or more processors 51; the memory 52 for storing one or more programs; when the one or more programs are executed by the one or more processors 51, the one or more processors 51 are caused to implement the heat pump apparatus control method provided in the above embodiment. Wherein the input device 53, the output device 54, the memory 52 and the processor 51 may be connected by a bus or other means, as exemplified by the bus connection in fig. 5.
The memory 52 is a computer readable storage medium, and can be used for storing software programs, computer executable programs, and modules, such as program instructions/modules corresponding to the heat pump device control method according to any embodiment of the present application (for example, the obtaining module 41, the frequency modulation module 42, and the switching module 43 in the heat pump device control device). The memory 52 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; the storage data area may store data created according to use of the device, and the like. Further, the memory 52 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 52 may further include memory located remotely from the processor 51, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 53 may be used to receive input numeric or character information and generate key signal inputs relating to user settings and function control of the apparatus. The output device 54 may include a display device such as a display screen.
The processor 51 executes various functional applications and data processing of the apparatus by executing software programs, instructions, and modules stored in the memory 52, thereby implementing the heat pump apparatus control method described above.
The heat pump device control device, the equipment and the computer provided by the above can be used for executing the heat pump device control method provided by any of the above embodiments, and have corresponding functions and beneficial effects.
Embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a heat pump apparatus control method provided in the above embodiments, the heat pump apparatus control method including: acquiring a first output water temperature of a hot water heat exchanger in a heat pump unit and a second output water temperature of a hollow heat exchanger of the heat pump unit; when the first output water temperature is greater than or equal to a first preset threshold value and the second output water temperature reaches a second preset threshold value, reducing the rated frequency of the compressor to the valve switching frequency; switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in a heat pump unit so as to enable the air-conditioning heat exchanger and the outdoor unit to be in the same refrigerant loop; when the first output water temperature is smaller than or equal to a third preset threshold value, reducing the rated frequency of the compressor to the valve switching frequency; and the four-way valve is switched to communicate the hot water heat exchanger and the air-conditioning heat exchanger so that the hot water heat exchanger and the air-conditioning heat exchanger are in the same refrigerant loop.
Storage medium-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations, such as in different computer systems that are connected by a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium provided in the embodiments of the present application contains computer-executable instructions, and the computer-executable instructions are not limited to the heat pump apparatus control method described above, and may also perform related operations in the heat pump apparatus control method provided in any embodiment of the present application.
The heat pump apparatus control device, the apparatus, and the storage medium provided in the above embodiments may perform the heat pump apparatus control method provided in any embodiment of the present application, and refer to the heat pump apparatus control method provided in any embodiment of the present application without detailed technical details described in the above embodiments.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship merely for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principles of the present application have been described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of the present application.
Claims (16)
1. A heat pump apparatus control method characterized by comprising:
acquiring a first output water temperature of a hot water heat exchanger in a heat pump unit and a second output water temperature of a hollow heat exchanger in the heat pump unit;
when the first output water temperature is greater than or equal to a first preset threshold value and the second output water temperature reaches a second preset threshold value, reducing the rated frequency of the compressor to the valve switching frequency;
switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit so as to enable the air-conditioning heat exchanger and the outdoor unit to be in the same refrigerant loop;
when the first output water temperature is smaller than or equal to a third preset threshold value, reducing the rated frequency of the compressor to the valve switching frequency;
and switching a four-way valve to communicate the hot water heat exchanger and the air-conditioning heat exchanger so as to enable the hot water heat exchanger and the air-conditioning heat exchanger to be in the same refrigerant loop.
2. The heat pump apparatus control method according to claim 1, characterized by further comprising:
acquiring first fault information of a hot water heat exchanger in a heat pump unit and second fault information of an air conditioner heat exchanger;
when the first fault information indicates a fault, the second output water temperature reaches the second preset threshold value, and the second fault information indicates normal, reducing the rated frequency of the compressor to the valve switching frequency;
and switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit.
3. The heat pump apparatus control method according to claim 2, wherein when the first failure information indicates a failure, the method includes:
timing and recording a first timing duration after the first fault information indicates a fault; and if the first timing duration reaches a first duration threshold, the first fault information still indicates the fault.
4. The heat pump apparatus control method according to claim 1, wherein the switching four-way valve includes:
after the rated frequency of the compressor is reduced to the valve switching frequency, timing and recording a second timing duration;
and when the second timing duration reaches a second duration threshold value, switching the four-way valve.
5. The heat pump apparatus control method according to claim 1 or 2, characterized by further comprising:
and after the four-way valve is switched, the valve switching frequency of the compressor is increased to the rated frequency.
6. The heat pump apparatus control method according to claim 5, wherein increasing the switching frequency of the compressor to the rated frequency after switching the four-way valve comprises:
after the four-way valve is switched, timing and recording the third timing length;
and when the third timing duration reaches a third duration threshold, increasing the valve switching frequency of the compressor to the rated frequency.
7. The heat pump apparatus control method according to claim 1, characterized by further comprising:
and after the rated frequency of the compressor is reduced to the valve cutting frequency, the fan of the outdoor unit is started.
8. The heat pump apparatus control method according to claim 7, characterized by further comprising:
and after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, the fan is closed.
9. The heat pump apparatus control method according to claim 8, wherein switching the four-way valve to communicate the hot water heat exchanger and the air conditioner heat exchanger and then turning off the fan includes:
after the four-way valve is switched to communicate the hot water heat exchanger and the air conditioner heat exchanger, timing and recording a fourth timing duration;
and when the fourth timing duration reaches a fourth duration threshold, closing the fan.
10. The heat pump apparatus control method according to claim 1, characterized by further comprising:
and after the four-way valve is switched to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit, the circulating water pump of the hot water heat exchanger is closed.
11. The heat pump apparatus control method according to claim 10, characterized by further comprising:
and after the rated frequency of the compressor is reduced to the valve cutting frequency next time, starting a circulating water pump of the hot water heat exchanger.
12. The heat pump apparatus control method according to claim 10, wherein switching the four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit of the heat pump unit and then turning off the circulating water pump of the hot water heat exchanger includes:
switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit, timing and recording a fifth timing duration;
and when the fifth timing duration reaches a fifth duration threshold, closing the circulating water pump of the hot water heat exchanger.
13. A heat pump apparatus control apparatus, characterized by comprising:
the acquisition module is used for acquiring a first output water temperature of a hot water heat exchanger in a heat pump unit and a second output water temperature of a hollow heat exchange device in the heat pump unit;
the frequency modulation module is used for reducing the rated frequency of the compressor to the valve switching frequency when the first output water temperature is greater than or equal to a first preset threshold and the second output water temperature reaches a second preset threshold;
the switching module is used for switching a four-way valve to communicate the air-conditioning heat exchanger with an outdoor unit in the heat pump unit so as to enable the air-conditioning heat exchanger and the outdoor unit to be in the same refrigerant loop;
the frequency modulation module is also used for reducing the rated frequency of the compressor to the valve switching frequency when the first output water temperature is smaller than or equal to a third preset threshold value;
the switching module is also used for switching a four-way valve to communicate the hot water heat exchanger and the air conditioner heat exchanger so as to enable the hot water heat exchanger and the air conditioner heat exchanger to be in the same refrigerant loop.
14. The heat pump unit is characterized by comprising a compressor, a four-way valve, a hot water heat exchanger, an air conditioner heat exchanger, an outdoor unit and an electronic expansion valve, wherein the output end of the compressor is connected with the first end of the four-way valve, the second end, the third end and the fourth end of the four-way valve are respectively connected with the input end of the hot water heat exchanger, the output end of the outdoor unit and the input end of the compressor, the fourth end of the four-way valve is further connected with the input end of the air conditioner heat exchanger, the electronic expansion valve is communicated between the output end of the air conditioner heat exchanger and the input end of the outdoor unit, and the four-way valve can be communicated with the air conditioner heat exchanger and the outdoor unit or communicated with the hot water heat exchanger and the air conditioner heat exchanger.
15. A computer device, comprising: a memory and one or more processors;
the memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the heat pump apparatus control method according to any one of claims 1 to 12.
16. A storage medium containing computer-executable instructions, which when executed by a computer processor, operate to perform the heat pump apparatus control method of any one of claims 1-12.
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| CN114234468B (en) | 2023-08-18 |
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