CN117450563A - Air source heat pump unit and control method thereof - Google Patents

Air source heat pump unit and control method thereof Download PDF

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Publication number
CN117450563A
CN117450563A CN202210855202.9A CN202210855202A CN117450563A CN 117450563 A CN117450563 A CN 117450563A CN 202210855202 A CN202210855202 A CN 202210855202A CN 117450563 A CN117450563 A CN 117450563A
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CN
China
Prior art keywords
pipeline
valve
pump unit
heat pump
air source
Prior art date
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Pending
Application number
CN202210855202.9A
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Chinese (zh)
Inventor
辜良辉
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GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202210855202.9A priority Critical patent/CN117450563A/en
Publication of CN117450563A publication Critical patent/CN117450563A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/04—Other domestic- or space-heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/08—Arrangements for drainage, venting or aerating
    • F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
    • F24D19/088—Draining arrangements
    • 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
    • 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
    • F25B41/40—Fluid line arrangements
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

An air source heat pump unit and a control method thereof. The air source heat pump unit comprises a heat conducting medium heat exchange system, a fluorine pump heat exchange system and a first protection pipeline, wherein the heat conducting medium heat exchange system is provided with a liquid outlet pipeline and a liquid return pipeline which are connected externally, the first protection pipeline is provided with two first electric valves and a first frost prevention valve arranged between the two first electric valves, the first protection pipeline is connected with one of the liquid outlet pipeline and the liquid return pipeline in parallel, and the first electric valves are set to be powered on and powered off. In a refrigerating mode, controlling the two first electric valves on the first protection pipeline to be powered on, and even if the first anti-freezing valve is opened, the first anti-freezing valve at most discharges water between the two first electric valves on the first protection pipeline; in the heating mode, two first electric valves on the first protection pipeline are controlled to be powered off, and if the air source heat pump unit is powered off, after the first anti-freezing valve is opened, circulating water in the heat transfer medium heat exchange system can enter the first protection pipeline and be discharged from the first anti-freezing valve.

Description

Air source heat pump unit and control method thereof
Technical Field
The invention relates to the field of electrical equipment, in particular to an air source heat pump unit and a control method of the air source heat pump unit.
Background
An air source heat pump unit for changing coal into electricity comprises a heat conducting medium heat exchange system and a fluorine pump heat exchange system. The air source heat pump unit is arranged outdoors, the heat conducting medium heat exchange system and the fluorine pump heat exchange system are also arranged outdoors, and the heat conducting medium heat exchange system is communicated with the indoor heating pipeline to form a circulating flow path.
In order to prevent circulating water in the heat-conducting medium heat exchange system from being frozen and expanding to damage the heat-conducting medium heat exchange system due to power failure in winter, a liquid outlet pipeline and a liquid return pipeline of the heat-conducting medium heat exchange system are both provided with anti-freezing valves. When the temperature of the circulating water in the heat-conducting medium heat exchange system is lower than 3 ℃, the anti-freezing valve is automatically opened to discharge the circulating water in the heat-conducting medium heat exchange system, so that the circulating water in the heat-conducting medium heat exchange system is prevented from being frozen; when the temperature of circulating water in the heat-conducting medium heat exchange system is higher than 4 ℃, the anti-freezing valve is automatically closed.
However, when the air source heat pump unit is used for refrigerating (in summer), if the water temperature is selected to be 5 ℃, the temperature of the circulating water in the heat transfer medium heat exchange system can be reduced to 3 ℃, which also causes the anti-freezing valve to be automatically opened, so that a large amount of circulating water in the heat transfer medium heat exchange system is discharged, which is not allowed during refrigerating.
Disclosure of Invention
The invention mainly aims to provide an air source heat pump unit which can prevent a frost valve from discharging circulating water in a heat transfer medium heat exchange system during refrigeration.
The invention mainly aims to provide a control method of the air source heat pump unit.
In order to achieve the above purpose, the air source heat pump unit provided by the embodiment of the invention comprises a heat conducting medium heat exchange system and a fluorine pump heat exchange system, wherein the heat conducting medium heat exchange system is provided with a liquid outlet pipeline and a liquid return pipeline which are used for being externally connected; the air source heat pump unit further comprises: the first protection pipeline is provided with two first electric valves and a first frost valve positioned between the two first electric valves and is connected with one of the liquid outlet pipeline and the liquid return pipeline in parallel; the first electric valve is set to be powered on and powered off; the first frost prevention valve is arranged to be automatically conducted in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the first protection pipeline is not higher than a first set temperature, and to be automatically turned off in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the first protection pipeline is not lower than a second set temperature, and the first set temperature is not higher than the second set temperature.
In an exemplary embodiment, the air source heat pump unit further includes: the second protection pipeline is provided with two first electric valves and a second anti-freezing valve positioned between the two first electric valves, and is connected with the other one of the liquid outlet pipeline and the liquid return pipeline in parallel; the second frost prevention valve is set to be automatically conducted in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the second protection pipeline is not higher than a third set temperature, and is automatically turned off in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the second protection pipeline is not lower than a fourth set temperature, and the third set temperature is not higher than the fourth set temperature.
In an exemplary embodiment, the first protection pipeline is located below the liquid outlet pipeline and connected in parallel with the liquid outlet pipeline, and the second protection pipeline is located below the liquid return pipeline and connected in parallel with the liquid return pipeline.
In an exemplary embodiment, the first set temperature is less than or equal to 3 degrees celsius, the third set temperature is less than or equal to 3 degrees celsius, the second set temperature is greater than or equal to 4 degrees celsius, and the fourth set temperature is greater than or equal to 4 degrees celsius.
In an exemplary embodiment, the air source heat pump unit further includes: the second electric valve is arranged at the external connecting end of at least one of the liquid outlet pipeline and the liquid return pipeline, and is also arranged to be powered off and electrically connected.
In an exemplary embodiment, the second electric valves include two, one of the two second electric valves is disposed at an external connection end of the liquid outlet pipe, and the other one is disposed at an external connection end of the liquid return pipe.
In an exemplary embodiment, the air source heat pump unit further includes: the third electric valve and the water supplementing valve are communicated in series to form a liquid supplementing branch, an outlet of the liquid supplementing branch is communicated with at least one of the liquid outlet pipeline and the liquid return pipeline, and the third electric valve is powered off and powered on.
The control method of the air source heat pump unit provided by the embodiment of the invention comprises the following steps:
controlling the first electric valve to be powered on and off in response to a first working mode;
and in response to a second working mode, controlling the first electric valve to be powered off and turned on.
In an exemplary embodiment, the control method further includes: the second electrically operated valve is also controlled to be electrically conducted in response to the first operation mode or the second operation mode.
In an exemplary embodiment, the control method further includes: and in response to the first working mode or the second working mode, the third electric valve is also controlled to be electrified to conduct.
In an exemplary embodiment, the first operating mode includes a cooling mode and the second operating mode includes a heating mode.
According to the technical scheme, the heat-conducting medium heat exchange system is communicated with an indoor heating pipeline through a liquid outlet pipeline and a liquid return pipeline to form a circulating flow path, and the first protection pipeline is connected with one of the liquid outlet pipeline and the liquid return pipeline in parallel; in a refrigerating mode, the two first electric valves on the first protection pipeline are controlled to be electrified, so that the two first electric valves on the first protection pipeline are turned off, the first anti-freezing valve is not communicated with the circulating flow path at the moment, even if the first anti-freezing valve is turned on, the first anti-freezing valve can discharge water between the two first electric valves on the first protection pipeline at most, and the circulating water in the circulating flow path can not be discharged, so that the circulating water quantity in the circulating flow path can not be reduced, and the refrigerating performance of the air source heat pump unit can be guaranteed; under heating mode, control two first motorised valves on the first protection pipeline all outage for two first motorised valves on the first protection pipeline all switch on, and first frost valve and circulation flow path intercommunication this moment, if the air source heat pump unit outage, along with the circulating water temperature in the heat transfer medium heat transfer system reduces gradually, after first frost valve opens, the circulating water in the heat transfer medium heat transfer system can get into first protection pipeline to from first frost valve discharge, solved the circulating water in the heat transfer medium heat transfer system and frozen and distended heat transfer medium heat transfer system's problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an air source heat pump unit according to an embodiment of the present invention after being connected to an indoor heating pipeline;
fig. 2 is a schematic structural diagram of an embodiment of the air source heat pump unit according to another embodiment of the present invention after being connected to an indoor heating pipeline;
FIG. 3 is a flow chart of the operation of the first freeze valve in the on and off states;
FIG. 4 is a flow chart of the operation of the second freeze valve in the on and off states;
FIG. 5 is a flowchart of a control method of an air source heat pump unit according to an embodiment of the present invention;
fig. 6 is a flowchart of a control method of an air source heat pump unit according to another embodiment of the present invention.
The correspondence between the reference numerals and the component names in fig. 1 and 2 is:
100 heat conducting medium heat exchange systems, 110 liquid outlet pipelines, 120 liquid return pipelines, 200 fluorine pump heat exchange systems, 300 first protection pipelines, 310 first frost valves, 410 first electric valves, 420 second electric valves, 430 third electric valves, 440 water supplementing valves, 500 second protection pipelines, 510 second frost valves and 600 indoor heating pipelines.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; "coupled" may be directly connected or indirectly connected through intervening media, and may be in the internal communication of two elements or in the interaction of two elements, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
As shown in fig. 1 and fig. 2, the air source heat pump unit provided by the embodiment of the invention comprises a heat conducting medium heat exchange system 100 and a fluorine pump heat exchange system 200, wherein the heat conducting medium heat exchange system 100 is provided with a liquid outlet pipeline 110 and a liquid return pipeline 120 which are used for external connection, and the external connection end of the liquid outlet pipeline 110 and the external connection end of the liquid return pipeline 120 are correspondingly communicated with the two ends of an indoor heating pipeline 600 one by one. The air source heat pump unit further includes: there are two first electrically operated valves 410 and a first protection line 300 of a first freeze valve 310 between the two first electrically operated valves 410, the first protection line 300 being connected in parallel with one of the liquid outlet line 110 and the liquid return line 120. Wherein the first electric valve 410 is configured to be powered on and powered off; as shown in fig. 3, the first freeze preventing valve 310 is configured to be self-turned on in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the first protection pipe 300 not being higher than a first set temperature, and to be self-turned off in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the first protection pipe 300 not being lower than a second set temperature, the first set temperature being equal to or lower than the second set temperature, and the heat transfer medium being water.
The heat transfer medium heat exchange system 100 is communicated with the indoor heating pipeline 600 through the liquid outlet pipeline 110 and the liquid return pipeline 120 to form a circulating flow path, and the first protection pipeline 300 is connected with one of the liquid outlet pipeline 110 and the liquid return pipeline 120 in parallel; in the refrigeration mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered on, so that the two first electric valves 410 on the first protection pipeline 300 are turned off, at the moment, the first anti-freezing valve 310 is not communicated with the circulation flow path, even if the first anti-freezing valve 310 is turned on (namely, the temperature of a heat conducting medium between the two first electric valves 410 of the first protection pipeline 300 is reduced to be not higher than a first set temperature, so that the first anti-freezing valve 310 is automatically conducted), the first anti-freezing valve 310 at most discharges water between the two first electric valves 410 on the first protection pipeline 300, and circulation water in the circulation flow path is not discharged, so that not only the circulation water quantity in the circulation flow path is not reduced, but also the refrigeration performance of the air source heat pump unit is ensured; in the heating mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered off, so that the two first electric valves 410 on the first protection pipeline 300 are both conducted, at this time, the first anti-freezing valve 310 is communicated with the circulation flow path, if the air source heat pump unit is powered off, the circulating water temperature in the heat-conducting medium heat exchange system 100 gradually decreases along with the power failure of the air source heat pump unit, after the first anti-freezing valve 310 is opened (i.e. the water temperature in the first protection pipeline 300 decreases to be not higher than the first set temperature, so that the first anti-freezing valve 310 is automatically conducted), the circulating water in the heat-conducting medium heat exchange system 100 can enter the first protection pipeline 300 and is discharged from the first anti-freezing valve 310, and the problem that the circulating water in the heat-conducting medium heat exchange system 100 is frozen and the heat-conducting medium heat exchange system 100 is swelled is solved.
In one embodiment, the first protection pipe 300 is connected in parallel with the liquid outlet pipe 110; in the refrigeration mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered on, so that the two first electric valves 410 on the first protection pipeline 300 are turned off, at this time, the first anti-freezing valve 310 is not communicated with the circulation flow path, and the circulating water in the air source heat pump unit is only transmitted to the indoor heating pipeline 600 through the liquid outlet pipeline 110 and cannot be transmitted to the indoor heating pipeline 600 through the first protection pipeline 300; in the heating mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered off, so that the two first electric valves 410 on the first protection pipeline 300 are all conducted, at this time, the first anti-freezing valve 310 is communicated with the circulation flow path, one part of circulating water in the air source heat pump unit is transmitted to the indoor heating pipeline 600 through the liquid outlet pipeline 110, and the other part of circulating water is transmitted to the indoor heating pipeline 600 through the first protection pipeline 300.
In another embodiment, the first protection circuit 300 is connected in parallel with the liquid return circuit 120; in the refrigeration mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered on, so that the two first electric valves 410 on the first protection pipeline 300 are turned off, at this time, the first anti-freezing valve 310 is not communicated with the circulation flow path, and the circulating water in the indoor heating pipeline 600 is only transmitted to the air source heat pump unit through the liquid return pipeline 120 and cannot be transmitted to the air source heat pump unit through the first protection pipeline 300; in the heating mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered off, so that the two first electric valves 410 on the first protection pipeline 300 are all conducted, at this time, the first anti-freezing valve 310 is communicated with the circulation flow path, at this time, part of circulating water in the indoor heating pipeline 600 is transmitted to the air source heat pump unit through the liquid return pipeline 120, and the other part is transmitted to the air source heat pump unit through the first protection pipeline 300.
In an exemplary embodiment, as shown in fig. 1 and 2, the air source heat pump unit further includes: a second protection pipeline 500 provided with two first electric valves 410 and a second anti-freezing valve 510 positioned between the two first electric valves 410, wherein the second protection pipeline 500 is connected in parallel with the other one of the liquid outlet pipeline 110 and the liquid return pipeline 120; as shown in fig. 4, the second freeze protection valve 510 is configured to be automatically turned on in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 not being higher than a third set temperature, and to be automatically turned off in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 not being lower than a fourth set temperature, the third set temperature being equal to or lower than the fourth set temperature.
The heat transfer medium heat exchange system 100 is communicated with the indoor heating pipeline 600 through the liquid outlet pipeline 110 and the liquid return pipeline 120 to form a circulating flow path, and the second protection pipeline 500 is connected with the other one of the liquid outlet pipeline 110 and the liquid return pipeline 120 in parallel; in the refrigeration mode, the two first electric valves 410 on the second protection pipeline 500 are controlled to be powered on, so that the two first electric valves 410 on the second protection pipeline 500 are turned off, at the moment, the second anti-freezing valve 510 is not communicated with the circulation flow path, even if the second anti-freezing valve 510 is turned on (i.e. the temperature of the heat conducting medium between the two first electric valves 410 of the second protection pipeline 500 is reduced to be not higher than the third set temperature, so that the second anti-freezing valve 510 is automatically conducted), the second anti-freezing valve 510 at most discharges water between the two first electric valves 410 on the second protection pipeline 500, and the circulating water in the circulation flow path is not discharged, so that not only the circulating water quantity in the circulation flow path is not reduced, but also the refrigeration performance of the air source heat pump unit is ensured; in the heating mode, the two first electric valves 410 on the second protection pipeline 500 are controlled to be powered off, so that the two first electric valves 410 on the second protection pipeline 500 are all conducted, at this time, the second anti-freezing valve 510 is communicated with the circulation flow path, if the air source heat pump unit is powered off, the temperature of the circulating water in the heat-conducting medium heat exchange system 100 gradually decreases along with the power failure of the air source heat pump unit, after the second anti-freezing valve 510 is opened (i.e. the temperature of the water in the second protection pipeline 500 decreases to be not higher than the third set temperature, so that the second anti-freezing valve 510 is automatically conducted), the circulating water in the heat-conducting medium heat exchange system 100 is discharged from the second anti-freezing valve 510, and the problem that the circulating water in the heat-conducting medium heat exchange system 100 is frozen and the heat-conducting medium heat exchange system 100 is swelled is solved.
The first set temperature is the same as the third set temperature, and the second set temperature is the same as the fourth set temperature. In the heating mode, when the mains supply is powered off and the temperature of the circulating water in the heat-conducting medium heat exchange system 100 is reduced to be lower than the first set temperature and the third set temperature, the first anti-freezing valve 310 and the second anti-freezing valve 510 are both automatically conducted to drain the heat-conducting medium heat exchange system 100, so that the circulating water in the heat-conducting medium heat exchange system 100 can be discharged more quickly and thoroughly, and the problem that the heat-conducting medium heat exchange system 100 is damaged due to expansion caused by freezing of the circulating water in the heat-conducting medium heat exchange system 100 is better solved.
In one example, as shown in fig. 1 and 2, the first protection pipe 300 is located below the liquid outlet pipe 110 and connected in parallel with the liquid outlet pipe 110, and the second protection pipe 500 is located below the liquid return pipe 120 and connected in parallel with the liquid return pipe 120. Wherein, as shown in fig. 3: the first freeze preventing valve 310 is self-conducted in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the first protection pipe 300 not being higher than the first set temperature; the first freeze valve 310 is automatically turned off in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the first protection pipe 300 being not lower than the second set temperature; as shown in fig. 4, the second anti-freeze valve 510 is self-turned on in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 not being higher than the third set temperature, and the second anti-freeze valve 510 is self-turned off in response to the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 not being lower than the fourth set temperature.
The first anti-freezing valve 310 is lower than the liquid outlet pipeline 110, and the second anti-freezing valve 510 is lower than the liquid return pipeline 120, so that in a heating mode, the mains supply is powered off, and the temperature of circulating water in the heat-conducting medium heat exchange system 100 is reduced to be lower than the first set temperature and the third set temperature, so that when the first anti-freezing valve 310 and the second anti-freezing valve 510 are both automatically conducted, more circulating water in the heat-conducting medium heat exchange system 100 can flow out from the first anti-freezing valve 310 and the second anti-freezing valve 510 under the action of gravity.
In one embodiment, as shown in FIGS. 3 and 4, the first set temperature is less than or equal to 2-3 degrees Celsius, the third set temperature is less than or equal to 2-3 degrees Celsius, the second set temperature is greater than or equal to 4 degrees Celsius, and the fourth set temperature is greater than or equal to 4 degrees Celsius.
In an exemplary embodiment, as shown in fig. 2, the air source heat pump unit further includes: the second electric valve 420 is arranged at the external connection end of at least one of the liquid outlet pipeline 110 and the liquid return pipeline 120, and the second electric valve 420 is also arranged to be powered off and powered on. The second electric valve 420 is installed in the room, when the power is off in winter, the second electric valve 420 is turned off, the indoor temperature is generally higher than 0 ℃, so that the circulating water in the indoor heating pipeline 600 can not freeze, the second electric valve 420 can block the circulating water in the indoor heating pipeline 600 from flowing to the heat transfer medium heat exchange system 100, the circulating water in the indoor heating pipeline 600 is stored in the indoor heating pipeline 600, the drainage of the first anti-freezing valve 310 and the second anti-freezing valve 510 when being conducted can be reduced, the water supplementing amount is small after the air source heat pump unit is powered on again, and the water resource can be saved.
In an example, as shown in fig. 2, the second electric valves 420 include two, and one of the two second electric valves 420 is disposed at an external connection end of the liquid outlet pipe 110, and the other is disposed at an external connection end of the liquid return pipe 120. When the power is off in winter, the two second electric valves 420 cut off the circulating water in the indoor heating pipeline 600 and the circulating water in the heat-conducting medium heat exchange system 100, and the first anti-freezing valve 310 and the second anti-freezing valve 510 only discharge the circulating water in the heat-conducting medium heat exchange system 100 when being conducted, so that the air source heat pump unit only supplements the water quantity lacking in the heat-conducting medium heat exchange system 100 after being powered on again, the indoor heating pipeline 600 does not need to supplement water, the water supplementing quantity is less, and the water source is saved.
In an exemplary embodiment, as shown in fig. 1 and 2, the air source heat pump unit further includes: the third electric valve 430 and the water supplementing valve 440 are arranged to be communicated in series to form a fluid supplementing branch, the fluid supplementing branch is arranged indoors, an outlet of the fluid supplementing branch is arranged to be communicated with the indoor heating pipeline 600, an inlet of the fluid supplementing branch is arranged to be communicated with a tap water source, and the third electric valve 430 is arranged to be powered off and powered on.
The water replenishing valve 440 is a valve integrating functions of a pressure reducing valve, a stop valve, a check valve and a filter, the working principle of the water replenishing valve 440 is similar to that of the pressure reducing valve, the spring force is balanced by using the inlet pressure and the outlet pressure, when the system pressure is insufficient, the spring force is larger than the sum of the inlet pressure and the outlet pressure, the valve core of the water replenishing valve 440 is opened under the action of the spring force, water replenishing from the inlet is started, the pressure of the outlet end of the water replenishing valve 440 is increased along with the water replenishing to the system, until the inlet pressure and the outlet pressure are equal to the spring force, and the water replenishing valve 440 is closed again.
The third electrically operated valve 430 may be arranged to be electrically connected to a mains supply; alternatively, the third electric valve 430 may be electrically connected to a control device of the air source heat pump unit; the third electric valve 430 is electrically conducted, when water is lacking in the circulation flow path, the water pressure in the circulation flow path is lower than the water pressure of the tap water source, at this time, the water supplementing valve 440 is automatically conducted under the pressure difference, and the tap water source supplements water in the circulation flow path; when the water pressure in the circulation flow path is equal to the water pressure of the tap water source, the water replenishing valve 440 is automatically closed, and water replenishing in the circulation flow path is completed. When the mains supply is cut off and the third electrically operated valve 430 is turned off, the first and second freeze valves 310 and 510 are turned on in winter to drain, and the tap water source is turned off and the third electrically operated valve 430 is turned off, so that the water cannot be supplied to the circulation passage.
The control method of the air source heat pump unit provided by the embodiment of the invention, as shown in fig. 5, comprises the following steps:
in response to the first mode of operation, the first electrically operated valve 410 is controlled to be powered on to be turned off;
in response to the second mode of operation, the first electrically operated valve 410 is controlled to be de-energized and turned on.
The first working mode is set to be a refrigeration mode (i.e. refrigeration operation), in the refrigeration mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered on, so that the two first electric valves 410 on the first protection pipeline 300 are turned off, at the moment, the first anti-freezing valve 310 is not communicated with the circulation flow path, even if the first anti-freezing valve 310 is opened, the first anti-freezing valve 310 can discharge water between the two first electric valves 410 on the first protection pipeline 300 at most, and the circulation water in the circulation flow path can not be discharged, thus not only the circulation water quantity in the circulation flow path can not be reduced, but also the refrigeration performance of the air source heat pump unit can be ensured; the second working mode is set to a heating mode (i.e. heating operation), in the heating mode, the two first electric valves 410 on the first protection pipeline 300 are controlled to be powered off, so that the two first electric valves 410 on the first protection pipeline 300 are both conducted, at this time, the first anti-freezing valve 310 is communicated with the circulation flow path, if the air source heat pump unit is powered off, the temperature of the circulation water in the heat-conducting medium heat exchange system 100 is gradually reduced along with the gradual reduction of the temperature of the circulation water in the heat-conducting medium heat exchange system 100, after the first anti-freezing valve 310 is opened, the circulation water in the heat-conducting medium heat exchange system 100 can enter the first protection pipeline 300 and be discharged from the first anti-freezing valve 310, and the problem that the heat-conducting medium heat exchange system 100 is damaged due to the freezing of the circulation water in the heat-conducting medium heat exchange system 100 is solved.
In the operation process of the air source heat pump unit, as shown in fig. 3, when the temperature of the heat conducting medium between the two first electric valves 410 of the first protection pipeline 300 is not higher than the first set temperature, the first anti-freezing valve 310 is automatically turned on; when the temperature of the heat conducting medium between the two first electric valves 410 of the first protection pipeline 300 is not lower than the second set temperature, the first anti-freezing valve 310 is automatically turned off; as shown in fig. 4, when the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 is not higher than the third set temperature, the second anti-freezing valve 510 is automatically turned on, and when the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 is not lower than the fourth set temperature, the second anti-freezing valve 510 is automatically turned off.
In an example, as shown in fig. 6, the control method further includes: the second electrically operated valve 420 is also controlled to be electrically conductive in response to the first or second operation mode.
The second electric valve 420 is installed in the room, when the power is off in winter, the second electric valve 420 is turned off, the indoor temperature is generally higher than 0 ℃, so that the circulating water in the indoor heating pipeline 600 cannot freeze, the second electric valve 420 prevents the circulating water in the room from flowing to the heat medium heat exchange system 100, the circulating water is stored in the indoor heating pipeline 600, the water discharge of the first anti-freezing valve 310 and the second anti-freezing valve 510 when being conducted can be reduced, the water supplement amount is small after the air source heat pump unit is powered on again, and the water resource can be saved.
In the operation process of the air source heat pump unit, as shown in fig. 3, when the temperature of the heat conducting medium between the two first electric valves 410 of the first protection pipeline 300 is not higher than the first set temperature, the first anti-freezing valve 310 is automatically turned on; when the temperature of the heat conducting medium between the two first electric valves 410 of the first protection pipeline 300 is not lower than the second set temperature, the first anti-freezing valve 310 is automatically turned off; as shown in fig. 4, when the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 is not higher than the third set temperature, the second anti-freezing valve 510 is automatically turned on, and when the temperature of the heat transfer medium between the two first electrically operated valves 410 of the second protection pipe 500 is not lower than the fourth set temperature, the second anti-freezing valve 510 is automatically turned off.
In an example, the control method further comprises: in response to the first operation mode or the second operation mode, the third electrically operated valve 430 is also controlled to be electrically turned on (not shown).
The third electric valve 430 is electrically conducted, when water is lacking in the circulation flow path, the water pressure in the circulation flow path is lower than the water pressure of the tap water source, at this time, the water supplementing valve 440 is automatically conducted under the pressure difference, and the tap water source supplements water in the circulation flow path; when the water pressure in the circulation flow path is equal to the water pressure of the tap water source, the water replenishing valve 440 is automatically closed, and water replenishing in the circulation flow path is completed. When the mains supply is cut off, the third electrically operated valve 430 is turned off, and the first and second anti-freeze valves 310 and 510 are turned on in winter to drain, the tap water source will not replenish water into the circulation flow path.
Of course, the third electric valve 430 may be directly electrically connected to the mains supply, and the purpose of the present application may be achieved, and the purpose of the present application is not departing from the design concept of the present invention, and the present application shall not be repeated herein.
In summary, in the technical scheme of the invention, the heat transfer medium heat exchange system is communicated with the indoor heating pipeline through the liquid outlet pipeline and the liquid return pipeline to form a circulating flow path, and the first protection pipeline is connected with one of the liquid outlet pipeline and the liquid return pipeline in parallel; in a refrigerating mode, the two first electric valves on the first protection pipeline are controlled to be electrified, so that the two first electric valves on the first protection pipeline are turned off, the first anti-freezing valve is not communicated with the circulating flow path at the moment, even if the first anti-freezing valve is turned on, the first anti-freezing valve can discharge water between the two first electric valves on the first protection pipeline at most, and the circulating water in the circulating flow path can not be discharged, so that the circulating water quantity in the circulating flow path can not be reduced, and the refrigerating performance of the air source heat pump unit can be guaranteed; under heating mode, control two first motorised valves on the first protection pipeline all outage for two first motorised valves on the first protection pipeline all switch on, and first frost valve and circulation flow path intercommunication this moment, if the air source heat pump unit outage, along with the circulating water temperature in the heat transfer medium heat transfer system reduces gradually, after first frost valve opens, the circulating water in the heat transfer medium heat transfer system can get into first protection pipeline to from first frost valve discharge, solved the circulating water in the heat transfer medium heat transfer system and frozen and distended heat transfer medium heat transfer system's problem.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms "upper", "lower", "one side", "the other side", "one end", "the other end", "the side", "the opposite", "four corners", "the periphery", "the" mouth "character structure", etc., are directions or positional relationships based on the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structures referred to have a specific direction, are configured and operated in a specific direction, and thus are not to be construed as limiting the present invention.
In the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," "assembled" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, and may also be in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Although the embodiments of the present invention are described above, the embodiments are only used for facilitating understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is defined by the appended claims.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (11)

1. The air source heat pump unit is characterized by comprising a heat conducting medium heat exchange system and a fluorine pump heat exchange system, wherein the heat conducting medium heat exchange system is provided with a liquid outlet pipeline and a liquid return pipeline which are connected externally; the air source heat pump unit is characterized by further comprising:
the first protection pipeline is provided with two first electric valves and a first frost valve positioned between the two first electric valves and is connected with one of the liquid outlet pipeline and the liquid return pipeline in parallel;
the first electric valve is set to be powered on and powered off; the first frost prevention valve is arranged to be automatically conducted in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the first protection pipeline is not higher than a first set temperature, and to be automatically turned off in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the first protection pipeline is not lower than a second set temperature, and the first set temperature is not higher than the second set temperature.
2. The air-source heat pump assembly according to claim 1, further comprising:
the second protection pipeline is provided with two first electric valves and a second anti-freezing valve positioned between the two first electric valves, and is connected with the other one of the liquid outlet pipeline and the liquid return pipeline in parallel;
the second frost prevention valve is set to be automatically conducted in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the second protection pipeline is not higher than a third set temperature, and is automatically turned off in response to the fact that the temperature of the heat conducting medium between the two first electric valves of the second protection pipeline is not lower than a fourth set temperature, and the third set temperature is not higher than the fourth set temperature.
3. The air-source heat pump unit according to claim 2, wherein the first protection pipeline is located below the liquid outlet pipeline and connected in parallel with the liquid outlet pipeline, and the second protection pipeline is located below the liquid return pipeline and connected in parallel with the liquid return pipeline.
4. The air-source heat pump unit according to claim 2, wherein the first set temperature is less than or equal to 3 degrees celsius, the third set temperature is less than or equal to 3 degrees celsius, the second set temperature is more than or equal to 4 degrees celsius, and the fourth set temperature is more than or equal to 4 degrees celsius.
5. An air source heat pump unit according to any one of claims 1 to 4, further comprising:
the second electric valve is arranged at the external connecting end of at least one of the liquid outlet pipeline and the liquid return pipeline, and is also arranged to be powered off and electrically connected.
6. The air-source heat pump unit according to claim 5, wherein the second electric valves include two, one of the two second electric valves is disposed at an external connection end of the liquid outlet pipe, and the other is disposed at an external connection end of the liquid return pipe.
7. An air source heat pump unit according to any one of claims 1 to 4, further comprising:
the third electric valve and the water supplementing valve are communicated in series to form a liquid supplementing branch, an outlet of the liquid supplementing branch is communicated with at least one of the liquid outlet pipeline and the liquid return pipeline, and the third electric valve is powered off and powered on.
8. A control method of an air source heat pump unit according to any one of claims 1 to 7, comprising:
controlling the first electric valve to be powered on and off in response to a first working mode;
and in response to a second working mode, controlling the first electric valve to be powered off and turned on.
9. The control method according to claim 8, wherein the air source heat pump unit is the air source heat pump unit according to claim 5; the control method further includes:
the second electrically operated valve is also controlled to be electrically conducted in response to the first operation mode or the second operation mode.
10. The control method according to claim 8, wherein the air source heat pump unit is the air source heat pump unit of claim 7; the control method further includes:
and in response to the first working mode or the second working mode, the third electric valve is also controlled to be electrified to conduct.
11. The control method according to any one of claims 8 to 10, characterized in that,
the first operating mode includes a cooling mode and the second operating mode includes a heating mode.
CN202210855202.9A 2022-07-19 2022-07-19 Air source heat pump unit and control method thereof Pending CN117450563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210855202.9A CN117450563A (en) 2022-07-19 2022-07-19 Air source heat pump unit and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210855202.9A CN117450563A (en) 2022-07-19 2022-07-19 Air source heat pump unit and control method thereof

Publications (1)

Publication Number Publication Date
CN117450563A true CN117450563A (en) 2024-01-26

Family

ID=89589811

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210855202.9A Pending CN117450563A (en) 2022-07-19 2022-07-19 Air source heat pump unit and control method thereof

Country Status (1)

Country Link
CN (1) CN117450563A (en)

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