WO2023005246A1 - Procé dé de commande pour unité de pompe à chaleur à air - Google Patents

Procé dé de commande pour unité de pompe à chaleur à air Download PDF

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Publication number
WO2023005246A1
WO2023005246A1 PCT/CN2022/083676 CN2022083676W WO2023005246A1 WO 2023005246 A1 WO2023005246 A1 WO 2023005246A1 CN 2022083676 W CN2022083676 W CN 2022083676W WO 2023005246 A1 WO2023005246 A1 WO 2023005246A1
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WO
WIPO (PCT)
Prior art keywords
preset
water temperature
circulation loop
pressure
outlet water
Prior art date
Application number
PCT/CN2022/083676
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English (en)
Chinese (zh)
Inventor
张宝库
韩伟涛
张丽娟
毛守博
卢大海
Original Assignee
青岛海尔空调电子有限公司
青岛海尔空调器有限总公司
海尔智家股份有限公司
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Application filed by 青岛海尔空调电子有限公司, 青岛海尔空调器有限总公司, 海尔智家股份有限公司 filed Critical 青岛海尔空调电子有限公司
Publication of WO2023005246A1 publication Critical patent/WO2023005246A1/fr

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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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • 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

Definitions

  • the invention relates to the technical field of antifreeze for air source heat pump units, and specifically provides a control method for air source heat pump units.
  • the present invention aims to solve the above-mentioned technical problem, that is, to solve the problem that the water-side heat exchanger of the existing air source heat pump unit is easy to be frozen and cracked during operation.
  • the present invention provides a control method for an air source heat pump unit.
  • the air source heat pump unit includes a refrigerant circulation loop, a water circulation loop and an auxiliary electric heating device.
  • the refrigerant circulation loop is provided with a compressor, a four-way valve, a second A heat exchanger, an electronic expansion valve and a second heat exchanger
  • the water circulation circuit is provided with a circulating water pump
  • the refrigerant circulation circuit and the water circulation circuit can realize heat exchange through the second heat exchanger
  • the The auxiliary electric heating device can heat the water in the water circulation loop
  • the control method includes: when the air source heat pump unit starts to start, first controlling the start of the circulating water pump; obtaining the water flow rate in the water circulation loop ; If the water flow rate is greater than or equal to the preset water flow rate, then control the operation of the refrigerant circulation loop; when the air source heat pump unit is in the heating mode, obtain the outlet water temperature of the water circulation loop; according to the outlet water Temperature, to control the
  • the step of "obtaining the outlet water temperature of the water circulation loop” specifically includes: acquiring the initial outlet water temperature of the water circulation loop when the water circulation loop is started; after a preset running time, Obtain the current outlet water temperature of the water circulation circuit; the step of "controlling the operating conditions of the refrigerant circulation circuit and the opening and closing state of the auxiliary electric heating device according to the outlet water temperature” specifically includes: according to the initial outlet water temperature and the current outlet water temperature to control the operating conditions of the refrigerant circulation loop and the on-off state of the auxiliary electric heating device.
  • the step of "controlling the operating condition of the refrigerant circulation loop and the opening and closing state of the auxiliary electric heating device according to the initial outlet water temperature and the current outlet water temperature” specifically includes : if the difference between the current outlet water temperature and the initial outlet water temperature is less than or equal to the preset outlet water temperature difference and the current outlet water temperature is less than or equal to the first preset outlet water temperature, then control the operating condition of the refrigerant circulation loop No change and the auxiliary electric heating device is turned on.
  • control method further includes: re-obtaining the outlet water temperature of the water circulation loop when the auxiliary electric heating device is turned on; when the re-acquired outlet water temperature is greater than the second When the outlet water temperature is preset, the auxiliary electric heating device is turned off; wherein, the second preset outlet water temperature is greater than the first preset outlet water temperature.
  • the refrigerant circulation circuit is also provided with a high and low pressure balance valve
  • the control method further includes: when the air source heat pump unit starts to operate in the defrosting mode, controlling the The four-way valve changes direction and controls the opening of the high and low pressure balance valves.
  • the step of "controlling the opening of the high and low pressure balance valve” specifically includes: controlling the opening of the preset protection period of the high and low pressure pressure balance valve.
  • the step of "controlling the operating state of the compressor and the operating state of the electronic expansion valve according to the numerical range of the low pressure" includes: if the low pressure is less than If the first preset low pressure is greater than or equal to the second preset low pressure and lasts for a first preset time period, then the operating frequency of the compressor and the opening degree of the electronic expansion valve are controlled to remain unchanged.
  • the step of "controlling the operating state of the compressor and the operating state of the electronic expansion valve according to the numerical range of the low pressure” further includes: if the low pressure If it is less than the second preset low pressure and greater than or equal to the third preset low pressure for a second preset duration, then the operating frequency of the compressor is controlled not to increase and the opening of the electronic expansion valve is controlled to increase. big.
  • the step of "controlling the operating state of the compressor and the operating state of the electronic expansion valve according to the numerical range of the low pressure” further includes: if the low pressure If the pressure is less than the third preset low pressure and greater than or equal to the fourth preset low pressure for a third preset time period, the operating frequency of the compressor is controlled to decrease and the opening of the electronic expansion valve is controlled to increase.
  • the step of "controlling the operating state of the compressor and the operating state of the electronic expansion valve according to the numerical range of the low pressure” further includes: if the low pressure If the pressure is less than the fourth preset low pressure and lasts for a fourth preset time period, the compressor and the electronic expansion valve are controlled to be closed.
  • the present invention can compare the water flow in the water circulation circuit with the preset water flow, and if the water flow is greater than or equal to the preset water flow, control the refrigerant
  • the operation of the circulation loop can also control the operating condition of the refrigerant circulation loop and the opening and closing state of the auxiliary electric heating device by obtaining the temperature of the outlet water in the water circulation loop when the air source heat pump unit is in the heating condition
  • Controlling the operating state of the compressor and the operating state of the electronic expansion valve by obtaining the low pressure of the refrigerant circulation circuit when the air source heat pump unit is in the cooling condition, therefore, the control method can effectively ensure Under any working conditions, the second heat exchanger will not be affected by factors such as too little water flow, too low water temperature, etc., causing it to be frozen and cracked, so as to effectively ensure its reliability.
  • Fig. 1 is the structural representation of air source heat pump unit of the present invention
  • Fig. 2 is the flow chart of main steps of the control method of the present invention.
  • Fig. 3 is the flow chart of specific steps of the first preferred embodiment of the control method of the present invention.
  • Fig. 4 is the flow chart of specific steps of the second preferred embodiment of the control method of the present invention.
  • the air source heat pump unit described in the present invention may be a split air source heat pump unit or an integral air source heat pump unit, which is not restrictive, and technicians can set the present invention according to the actual use requirements.
  • the object to which the control method is applied Such changes related to application objects do not deviate from the basic principle of the present invention, and belong to the protection scope of the present invention.
  • connection should be understood in a broad sense, for example, it can be directly connected, or indirectly connected through an intermediary, or it can be Communication within two elements should therefore not be construed as a limitation of the invention. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
  • FIG. 1 is a schematic structural diagram of the air source heat pump unit of the present invention.
  • the air source heat pump unit of the present invention includes a refrigerant circulation loop, a water circulation loop and an auxiliary electric heating device (not shown in the figure), the refrigerant circulation loop is provided with a compressor 1, a four-way valve 2,
  • the first heat exchanger 3, the electronic expansion valve 4, the second heat exchanger 5 and the gas-liquid separator 6, the low-pressure pressure sensor 7 are arranged at the air inlet of the compressor 1, of course, the specific setting position is not limited;
  • the water circulation A circulating water pump 8 and a flow meter 9 are arranged on the circuit, and the circulating water pump 8 and the flow meter 9 are arranged on the water inlet side of the second heat exchanger 5, and the outlet water temperature sensor 10 is arranged on the outlet water side of the second heat exchanger 5, so as to detect The temperature of the water in the water circulation loop after passing through the second heat exchanger 5; it should be noted that although the
  • the present invention does not impose any restrictions on the specific types of the first heat exchanger 3, the second heat exchanger 5, the low pressure sensor 7 and the outlet water temperature sensor 10.
  • the first heat exchanger 3 and the second heat exchanger 5 can be a plate heat exchanger or a casing heat exchanger, and the low-pressure pressure sensor 7 can be a capacitive pressure sensor, a piezoresistive pressure sensor, a piezoelectric pressure sensor, or an outlet water temperature sensor 10 can be a thermal sensor or a thermocouple sensor, and technicians can set it by themselves according to actual conditions.
  • the air source heat pump unit of the present invention is provided with heating working conditions, cooling working conditions and defrosting working conditions. Specifically, when the air source heat pump unit is in the heating working condition, the first heat exchanger 3 is used as evaporator, and the second heat exchanger 5 is used as a condenser; when the air source heat pump unit is in cooling and defrosting conditions, the first heat exchanger 3 is used as a condenser, and the second heat exchanger 5 is used as an evaporator.
  • the present invention does not impose any restrictions on the types of specific working conditions set for the air source heat pump unit. Obviously, other working conditions can also be set, and technicians can set them according to the actual situation.
  • the air source heat pump unit of the present invention also includes a controller, which can execute the control method of the present invention, for example: the controller can control the operating conditions of the refrigerant circulation loop, control the auxiliary electric The opening and closing state of the heating device controls the operating state of the compressor 1, the electronic expansion valve 4 and the circulating water pump 8, etc.
  • the controller can be either the original controller of the air source heat pump unit or a
  • the control method of the present invention is provided with a separate controller, and technicians can set the structure and model of the controller by themselves according to actual use requirements.
  • FIG. 2 is a flow chart of the main steps of the control method of the present invention. As shown in Figure 2, based on the air source heat pump unit described in the above embodiments, the control method of the present invention includes the following steps:
  • the controller first controls the circulating water pump 8 to start, and then obtains the water flow in the water circulation loop, if the water flow is greater than or equal to the preset water flow , the controller controls the operation of the refrigerant circulation loop.
  • the preset water flow rate is 70% of the standard water flow rate
  • the standard water flow rate is the water flow rate when the unit is in stable operation.
  • the acquisition method of the water flow rate can be monitored by the water flow rate, or by the water inflow time.
  • the present invention does not make any limitation on the acquisition method of the water flow rate. The actual situation is set by itself.
  • the present invention monitors the flow rate of water through the flowmeter 9, and then obtains the water flow rate in the water circulation loop, and determines the water flow rate through the water flow rate to ensure that Accuracy of the water flow obtained.
  • steps S4 and S5 when the air source heat pump unit is in heating mode, the outlet water temperature of the water circulation circuit is obtained, and the outlet water temperature sensor 10 can convert the outlet water temperature into an output signal and transmit it to the controller ;
  • the controller controls the operating conditions of the refrigerant circulation circuit and the on-off state of the auxiliary electric heating device according to the received outlet water temperature.
  • the present invention does not impose any restrictions on the above-mentioned specific control methods, and technicians can set them by themselves according to actual use requirements, as long as the operating conditions of the refrigerant circulation loop and the auxiliary electric heating device are controlled according to the outlet water temperature
  • the opening and closing state of the outlet water temperature belongs to the protection scope of the present invention; and the present invention does not impose any restrictions on the specific acquisition method and acquisition position of the outlet water temperature, and technicians can set it according to the actual situation.
  • steps S6 and S7 when the air source heat pump unit is in the cooling condition, the low pressure in the refrigerant circulation circuit is obtained, and the low pressure sensor 7 can convert the low pressure into an output signal and transmit it to the controller
  • the controller controls the operating state of the compressor 1 and the operating state of the electronic expansion valve 4 according to the value range of the low pressure. It should be noted that the present invention does not impose any restrictions on the specific value range of the numerical range, which can be set through multiple tests, or can be set according to the actual operating conditions of the air source heat pump unit, and technicians can Set it yourself according to the actual situation.
  • Fig. 3 is a flow chart of specific steps of the first preferred embodiment of the control method of the present invention. As shown in Figure 3, based on the air source heat pump unit described in the above embodiments, the control method of the first preferred embodiment of the present invention includes the following steps:
  • step S101 to S103 when the air source heat pump unit starts to start, the controller first controls the circulating water pump 8 to start, preferably after the circulating water pump 8 runs for a preset operation time, then obtains the water flow in the water circulation loop, In order to effectively ensure that the second heat exchanger 5 is filled with enough water, thereby effectively avoiding the phenomenon of "emptying" in the second heat exchanger 5, specifically, if the water flow rate is greater than or equal to the preset water flow rate, then the The controller controls the operation of the refrigerant circulation loop.
  • the controller controls the circulating water pump 8 to continue to run and controls the refrigerant circulation loop not to run until the water flow rate is greater than Or equal to the preset water flow.
  • the preset running time is 2 to 3 minutes
  • the preset water flow rate is 70% of the standard water flow rate. It should be noted that the acquisition method of the water flow rate can be monitored by the water flow rate, and can also be monitored by the water inflow time.
  • the present invention does not make any limitation on the acquisition method of the water flow rate, and technicians can Self-setting, as a preferred setting method, the present invention monitors the flow rate of water through the flow meter 9, and then obtains the water flow rate in the water circulation circuit, and determines the water flow rate through the water flow rate to ensure that the obtained The accuracy of the water flow rate.
  • the setting of the standard water flow rate can be the default setting of the air source heat pump unit when it leaves the factory, or it can be set by the user according to the actual operating conditions, and the present invention does not make any restrictions on this , technicians can set it by themselves.
  • steps S104 and S105 when the air source heat pump unit is in heating mode, when the water circulation loop is started, the initial outlet water temperature of the water circulation loop is obtained, and after a preset running time, the The current outlet water temperature of the water circulation circuit, the outlet water temperature sensor 10 can convert the initial outlet water temperature and the current outlet water temperature into an output signal and transmit it to the controller, and then the controller, according to the received initial outlet water temperature and the current outlet water temperature signal to control the operating conditions of the refrigerant circulation loop and the on-off state of the auxiliary electric heating device.
  • the preset running time is set to 30 minutes. Of course, this is only a preferred setting value and is not limiting.
  • the actual operating status of the heat pump unit is set by itself. It should be noted that, the present invention does not impose any limitation on the way of obtaining the initial outlet water temperature and the current outlet water temperature, and technicians can set them according to the actual situation.
  • step S106 if the difference between the current outlet water temperature and the initial outlet water temperature is less than or equal to the preset outlet water temperature difference and the current outlet water temperature is less than or equal to the first preset outlet water temperature, control the refrigerant circulation loop The operating conditions of the electric heater remain unchanged and the auxiliary electric heating device is turned on.
  • steps S107 and S108 when the auxiliary electric heating device is turned on, the outlet water temperature of the water circulation circuit is obtained again, and when the obtained outlet water temperature is greater than the second preset outlet water temperature, the auxiliary electric heating device is turned off. Electric heating device.
  • the preset water temperature difference is preferably 5°C
  • the second preset water temperature is greater than the first preset water temperature, wherein the first preset water temperature is preferably 20°C
  • the second preset outlet water temperature is preferably 22°C.
  • the present invention does not impose any restrictions on the specific values of the preset outlet water temperature difference, the first preset outlet water temperature, and the second preset outlet water temperature. It can be obtained through multiple experiments, and can also be obtained through user's own setting, which is not restrictive, and technicians can set by themselves according to the actual situation.
  • the air source heat pump unit also includes a high and low pressure balancing branch, one end of the high and low pressure balancing branch is connected between the exhaust port of the compressor 1 and the four-way valve 2, and the other end is connected to the compressor 1 Between the gas inlet and the gas-liquid separator 6, a high and low pressure balance valve 11 is arranged on the high and low pressure balance branch.
  • step S109 when the air source heat pump unit starts to operate under the defrosting condition, the four-way valve 2 is controlled to change direction and the high and low pressure balance valve 11 is controlled to open for a preset protection period.
  • the second heat exchanger 5 The passing refrigerant and water will not cause a large alternation of cold and heat due to the switching of the working conditions of the air source heat pump unit, and the setting of the high and low pressure balance valve 11 can effectively ensure that the second heat exchanger 5 will not be cracked by freezing situation, thereby ensuring its service life.
  • the preset protection time is 30 seconds. Of course, this is only a preferred setting value, and it is not restrictive. A specific duration of the preset protection duration is set.
  • the present invention does not impose any restrictions on the specific timing of the air source heat pump unit entering the defrosting mode, and technicians can set it according to actual use requirements.
  • Fig. 4 is a flow chart of specific steps of the second preferred embodiment of the control method of the present invention. As shown in Figure 4, based on the air source heat pump unit described in the above embodiments, the control method in the second preferred embodiment of the present invention includes the following steps:
  • S205 Control the running state of the compressor and the running state of the electronic expansion valve according to the value range of the low pressure
  • the controller first controls the circulating water pump 8 to start, preferably after the circulating water pump 8 runs for a preset operation time, then obtains the water flow in the water circulation loop, In order to effectively ensure that the second heat exchanger 5 is filled with enough water, thereby effectively avoiding the phenomenon of "emptying" in the second heat exchanger 5, specifically, if the water flow rate is greater than or equal to the preset water flow rate, then the The controller controls the operation of the refrigerant circulation loop.
  • the controller controls the circulating water pump 8 to continue to run and controls the refrigerant circulation loop not to run until the water flow rate is greater than Or equal to the preset water flow.
  • the preset running time is 2 to 3 minutes
  • the preset water flow rate is 70% of the standard water flow rate. It should be noted that the acquisition method of the water flow rate can be monitored by the water flow rate, and can also be monitored by the water inflow time.
  • the present invention does not make any limitation on the acquisition method of the water flow rate, and technicians can Self-setting, as a preferred setting method, the present invention monitors the flow rate of water through the flow meter 9, and then obtains the water flow rate in the water circulation circuit, and determines the water flow rate through the water flow rate to ensure that the obtained The accuracy of the water flow rate.
  • the setting of the standard water flow rate can be the default setting of the air source heat pump unit when it leaves the factory, or it can be set by the user according to the actual operating conditions, and the present invention does not make any restrictions on this , technicians can set it by themselves.
  • steps S204 and S205 when the air source heat pump unit is in cooling mode, the low-pressure pressure of the refrigerant circulation circuit is obtained, and the low-pressure pressure sensor 7 can convert the low-pressure pressure into an output signal and transmit it to the A controller; then, the controller controls the operating state of the compressor 1 and the operating state of the electronic expansion valve 4 according to the value range of the low pressure.
  • the present invention does not impose any restrictions on the specific value range of the numerical range, which can be set through multiple tests, or can be set according to the actual operating conditions of the air source heat pump unit, and technicians can Set it yourself according to the actual situation.
  • steps S206 to S209 if the low pressure is less than the first preset low pressure and greater than or equal to the second preset low pressure for a first preset duration, the controller controls the operating frequency and The opening of the electronic expansion valve 4 remains unchanged; if the low pressure is greater than or equal to the first preset low pressure, the controller controls the air source heat pump unit to operate according to normal logic, that is, as long as the low pressure The pressure is greater than or equal to the first preset low pressure, the operating parameters of the air source heat pump unit can be adjusted at any time according to actual needs, and the specific control logic is not restrictive; if the low pressure is less than the second The preset low pressure is greater than or equal to the third preset low pressure and lasts for a second preset duration, the controller controls the operating frequency of the compressor 1 not to increase and controls the opening of the electronic expansion valve 4 to increase; if The low pressure is less than the third preset low pressure and greater than or equal to the fourth preset low pressure and lasts for a third preset time, then the controller controls the
  • the present invention does not impose any restrictions on the specific durations of the first preset duration, the second preset duration, the third preset duration, and the fourth preset duration, which may be the same, It can also be different, and technicians can set it by themselves according to the actual operating conditions of the air source heat pump unit.
  • the specific durations of the first preset duration, the second preset duration, the third preset duration and the fourth preset duration are all 3 Minutes, that is, when the specific time exceeds 3 minutes, the second heat exchanger 5 will face the risk of freezing, but this is not restrictive.
  • the setting of the specific time Can be different.
  • the numerical values of the first preset low pressure, the second preset low pressure, the third preset low pressure and the fourth preset low pressure are not limiting, and technical Personnel can set it by themselves according to the multiple test results of the air source heat pump unit, as long as it is ensured that the second heat exchanger 5 will not be damaged due to freezing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

La présente invention concerne un procédé de commande pour une unité de pompe à chaleur à air, visant à résoudre le problème selon lequel des échangeurs de chaleur côté eau d'unités de pompe à chaleur à air existantes sont sujets à des fissurations par le gel dans un processus d'utilisation. Dans cet objectif, le flux d'eau dans une boucle de circulation d'eau est comparé à un flux d'eau prédéfini, de manière à commander le fonctionnement d'une boucle de circulation de fluide frigorigène ; un état de fonctionnement opérationnel de la boucle de circulation de fluide frigorigène et un état d'ouverture et de fermeture d'un dispositif de chauffage électrique d'assistance sont commandés par obtention d'une température d'eau de sortie dans la boucle de circulation d'eau lorsque l'unité de pompe à chaleur à air est dans un état de fonctionnement en chauffage ; et les états de fonctionnement d'un compresseur et d'un détendeur électronique sont commandés par obtention d'une basse pression de la boucle de circulation de fluide frigorigène lorsque l'unité de pompe à chaleur à air est dans un état de fonctionnement de réfrigération, de telle sorte que le problème selon lequel un second échangeur de chaleur est sujet à des fissurations par le gel dues à des facteurs tels qu'un flux d'eau trop faible et une température d'eau trop faible est efficacement résolu dans n'importe quelle condition de travail, ce qui permet d'assurer la fiabilité du second échangeur de chaleur.
PCT/CN2022/083676 2021-07-30 2022-03-29 Procé dé de commande pour unité de pompe à chaleur à air WO2023005246A1 (fr)

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CN202110875464.7 2021-07-30
CN202110875464.7A CN113623889B (zh) 2021-07-30 2021-07-30 用于空气源热泵机组的控制方法

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CN113623889B (zh) * 2021-07-30 2023-03-31 青岛海尔空调电子有限公司 用于空气源热泵机组的控制方法
CN114992778B (zh) * 2022-05-23 2024-02-20 青岛海尔空调电子有限公司 空调机组的防冻控制方法
CN115289611A (zh) * 2022-07-08 2022-11-04 青岛海尔空调电子有限公司 用于空气源热泵机组防冻的方法及装置、空气源热泵机组、存储介质
CN115183403A (zh) * 2022-07-08 2022-10-14 青岛海尔空调电子有限公司 用于空气源热泵机组防冻的方法及装置、空气源热泵机组、存储介质
CN115183405A (zh) * 2022-07-08 2022-10-14 青岛海尔空调电子有限公司 用于空气源热泵机组防冻的方法及装置、空气源热泵机组、存储介质
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