CN116499158A - Method and device for controlling heat pump unit, heat pump unit and storage medium - Google Patents
Method and device for controlling heat pump unit, heat pump unit and storage medium Download PDFInfo
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- CN116499158A CN116499158A CN202310533375.3A CN202310533375A CN116499158A CN 116499158 A CN116499158 A CN 116499158A CN 202310533375 A CN202310533375 A CN 202310533375A CN 116499158 A CN116499158 A CN 116499158A
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- heat pump
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000003507 refrigerant Substances 0.000 claims abstract description 160
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 95
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000005057 refrigeration Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 28
- 238000007710 freezing Methods 0.000 claims description 15
- 230000008014 freezing Effects 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 31
- 238000004891 communication Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 7
- 239000007921 spray Substances 0.000 description 7
- 241000233866 Fungi Species 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005339 levitation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/027—Condenser control arrangements
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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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of heat pump units, and discloses a method for controlling a heat pump unit, which comprises the following steps: responding to the starting signal, starting a refrigerating or heating mode to operate; determining a target circulation path of the refrigerant according to a refrigerating or heating mode; and controlling the on-off states of the first refrigerant circulation loop and the second refrigerant circulation loop according to the target circulation path. When the ambient temperature is high, a user sets an operation refrigeration mode of the heat pump unit, and the refrigerant flows through the first refrigerant circulation loop and flows through the condenser to perform heat exchange condensation. When the ambient temperature is low, a user sets a heat pump unit to operate a heating mode, the refrigerant flows in a second refrigerant circulation loop, the flow path avoids the condenser, and the problem that the condenser cannot exchange heat with the refrigerant normally due to the fact that the refrigerant is still controlled to flow through the condenser when the water surface in the condenser is at an icing risk when the temperature is too low is avoided. The application also discloses a device for controlling the heat pump unit, the heat pump unit and a storage medium.
Description
Technical Field
The present application relates to the technical field of heat pump units, for example, to a method and apparatus for controlling a heat pump unit, and a storage medium.
Background
The multi-split air conditioner in the direct expansion heat pump unit can be applied to edible fungi cultivation enterprises, fans are arranged on the indoor sides of each room, and one to two small-capacity module machines are arranged outdoors. The direct expansion heat pump unit operates in summer in a refrigerating mode, the indoor temperature of the cultivation room is reduced through the indoor fan unit, the indoor temperature of the cultivation room is increased through the indoor fan unit in winter in a heating mode, and therefore the indoor annual temperature of the cultivation room for edible fungi is suitable for edible fungi growth. The condenser of the direct expansion heat pump unit is mostly cooled by water cooling spraying to exchange heat with the refrigerant entering the condenser, when the heating mode is operated in winter, the outside temperature is low, water in the condenser is easy to freeze, and the normal use of the direct expansion heat pump unit is affected.
The related art discloses an anti-freezing control method for a heat pump water heater, (1) when an anti-freezing controller detects that the ambient temperature is lower than 0 ℃ and the internal temperature of a condenser is lower than 3 ℃, a heat tracing belt and a water pump are started; when the internal temperature of the condenser is higher than 10 ℃, the heat tracing belt and the water pump are turned off; (2) When the anti-freezing controller detects that the water pump is in a closed state and the ambient temperature is lower than 0 ℃, the water inlet temperature is lower than 3 ℃, the water pump is started; when the water pump is in an on state and the water inlet temperature is higher than 15 ℃, the water pump is turned off.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
the condenser is prevented from freezing by utilizing the heat tracing belt, and the structure is complex and the energy consumption is high.
It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method, a device, a heat pump unit and a storage medium for controlling the heat pump unit, wherein by arranging different refrigerant circulation loops, under the condition of low external temperature, a refrigerant does not flow through a condenser and directly enters a shell-and-tube heat exchanger to exchange heat, so that the influence of water freezing in the condenser on the operation stability of the heat pump unit is reduced. The structure for changing the flow direction of the refrigerant through the pipeline is simple.
In some embodiments, the heat pump unit includes a first refrigerant circulation loop, a second refrigerant circulation loop, a first valve bank, and a second valve bank. The first refrigerant circulation loop comprises a first refrigerant pipeline which is sequentially connected with a compressor, a condenser, a liquid reservoir, an indoor fan unit and a shell-and-tube heat exchanger. The second refrigerant circulation loop comprises a second refrigerant pipeline which is sequentially connected with the compressor, the indoor fan unit, the liquid reservoir and the shell-and-tube heat exchanger. The first valve group is arranged on the first refrigerant pipeline. The second valve group is arranged on the second refrigerant pipeline. The method for controlling the heat pump unit includes: the heat pump unit responds to a starting signal to perform refrigeration operation or heating operation; under the condition of refrigeration operation, the first valve group is opened, the second valve group is closed, and the refrigerant flows through the first refrigerant pipeline; or under the condition of heating operation, the first valve group is closed, and the second valve group is opened, so that the refrigerant flows through the second refrigerant pipeline.
Optionally, the shell-and-tube heat exchanger is provided with a water inlet pipe and a water outlet pipe. After closing the first valve group and opening the second valve group, the method for controlling the heat pump unit further comprises: acquiring the water outlet temperature of a water outlet pipe of the shell-and-tube heat exchanger; and adjusting the compression ratio of the compressor according to the outlet water temperature.
In some embodiments, an apparatus for controlling a heat pump unit includes a processor and a memory storing program instructions. The processor is configured to perform the aforementioned method for controlling the heat pump unit when executing the program instructions.
In some embodiments, the heat pump unit includes a first refrigerant circulation loop, a second refrigerant circulation loop, a first valve bank, and a second valve bank. The first refrigerant circulation loop comprises a first refrigerant pipeline which is sequentially connected with a compressor, a condenser, a liquid reservoir, an indoor fan unit and a shell-and-tube heat exchanger. The second refrigerant circulation loop comprises a second refrigerant pipeline which is sequentially connected with the compressor, the indoor fan unit, the liquid reservoir and the shell-and-tube heat exchanger. The first valve group is arranged on the first refrigerant pipeline. The second valve group is arranged on the second refrigerant pipeline. Under the condition of refrigeration operation, the first valve group is opened, the second valve group is closed, and the refrigerant flows through the first refrigerant pipeline; or under the condition of heating operation, the first valve group is closed, and the second valve group is opened, so that the refrigerant flows through the second refrigerant pipeline.
Optionally, the indoor fan group includes a plurality of indoor heat exchange branches, each indoor heat exchange branch including a first indoor heat exchange branch. The first refrigerant pipeline comprises a first pipeline, a second pipeline, a fourth pipeline, a first bypass pipeline and a second bypass pipeline. The first pipeline is communicated with the compressor and the condenser. The second pipeline is communicated with the condenser and the liquid reservoir. One end of the fourth pipeline is communicated with the liquid reservoir. One end of the first bypass pipeline is communicated with the other end of the fourth pipeline, and the other end of the first bypass pipeline is communicated with a plurality of first indoor heat exchange branches of the indoor fan unit. One end of the second bypass pipeline is communicated with a plurality of first indoor heat exchange branches of the indoor fan unit, and the other end of the second bypass pipeline is communicated with the shell-and-tube heat exchanger.
Optionally, the first valve group includes a first on-off valve, a third on-off valve, a fourth on-off valve, a fifth on-off valve, an eighth on-off valve, and a tenth on-off valve. The first on-off valve is arranged on the first pipeline. The third on-off valve is arranged on the second pipeline. The fourth on-off valve is arranged on a freezing water inlet pipeline communicated with the water inlet pipe of the shell-and-tube heat exchanger. The fifth on-off valve is arranged on a freezing water outlet pipeline communicated with the water outlet pipe of the shell-and-tube heat exchanger. The eighth on-off valve is arranged on the first bypass pipeline. The tenth on-off valve is arranged on the second bypass pipeline.
Optionally, each indoor heat exchange branch further comprises a second indoor heat exchange branch. The second refrigerant pipeline comprises a fifth pipeline, a third bypass pipeline and a third pipeline. One end of the fifth pipeline is arranged between the compressor and the condenser and is communicated with the first pipeline, and the other end of the fifth pipeline is communicated with a plurality of second indoor heat exchange branches of the indoor fan unit. One end of the third bypass pipeline is communicated with a plurality of second indoor heat exchange branches of the indoor fan unit, and the other end of the third bypass pipeline is communicated with the other end of the fourth pipeline. The third pipeline is communicated with the liquid storage device and the shell-and-tube heat exchanger.
Optionally, the second valve group includes a second on-off valve, a sixth on-off valve, a seventh on-off valve, and a ninth on-off valve. The second on-off valve is arranged on the fifth pipeline. The sixth on-off valve is arranged on a ground source water outlet pipeline communicated with a water outlet pipe of the shell-and-tube heat exchanger. The seventh on-off valve is arranged on a ground source water inlet pipeline communicated with a water inlet pipe of the shell-and-tube heat exchanger. The ninth on-off valve is arranged on the third bypass pipeline.
In some embodiments, the heat pump assembly further comprises the aforementioned means for controlling the heat pump assembly.
In some embodiments, a storage medium stores program instructions. When the program instructions are run, the method for controlling the heat pump unit is executed.
The method, the device, the heat pump unit and the storage medium for controlling the heat pump unit provided by the embodiment of the disclosure can realize the following technical effects:
the heat pump unit comprises two refrigerant circulation loops, wherein the first refrigerant circulation loop flows through an outdoor condenser, and a refrigerant circulation path in the second refrigerant circulation loop avoids the condenser. When the ambient temperature is high, a user sets an operation refrigeration mode of the heat pump unit, and the refrigerant flows through the first refrigerant circulation loop and flows through the condenser to perform heat exchange condensation. When the ambient temperature is low, a user sets a heat pump unit operation heating mode, the refrigerant flows in a second refrigerant circulation loop, a flow path avoids the condenser, the problem that the condenser cannot exchange heat with the refrigerant normally due to the fact that the refrigerant is still controlled to flow through the condenser when the water surface in the condenser is at an icing risk due to the fact that the temperature is too low is avoided, and the influence of water icing in the condenser on the operation stability of the heat pump unit is reduced. The structure for changing the flow direction of the refrigerant through the pipeline is simple. The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic structural view of a heat pump unit according to an embodiment of the present disclosure;
fig. 2 is a schematic flow path diagram of a refrigerant when the heat pump unit provided in the embodiment of the disclosure operates in a refrigeration mode;
fig. 3 is a schematic flow path diagram of a refrigerant when the heat pump unit according to the embodiment of the present disclosure operates in a heating mode;
FIG. 4 is a schematic diagram of a method for controlling a heat pump unit provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for controlling a heat pump unit provided by an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of an apparatus for controlling a heat pump unit provided by an embodiment of the present disclosure;
fig. 7 is a schematic diagram of a heat pump unit according to an embodiment of the disclosure.
Reference numerals:
1: a compressor;
2: a condenser; 21: a water tank; 22: a spray pump; 23: a spray nozzle;
3: a reservoir; 31: a first outlet; 32: a second outlet;
4: a shell-and-tube heat exchanger; 41: a water inlet pipe; 42: a water outlet pipe; 43: a first inlet; 44: a second inlet; 45: a third inlet;
5: an indoor fan unit; 51: a first indoor heat exchange branch; 511: an indoor fan; 512: a thermal expansion valve; 513: a first electromagnetic valve; 52: a second indoor heat exchange branch; 521: a second electromagnetic valve;
61: a first pipeline; 611: a one-way valve; 62: a second pipeline; 63: a third pipeline; 64: a fourth pipeline; 65: a fifth pipeline;
71: a first bypass line; 72: a second bypass line; 73: a third bypass line; 74: a fourth bypass line; 75: a load balancing loop; 751: a load balancing valve;
81: freezing a water inlet pipeline; 82: freezing a water outlet pipeline; 83: ground source water inlet pipeline; 84: ground source water outlet pipeline;
91: a first on-off valve; 92: a second on-off valve; 93: a third cut-off valve; 94: a fourth shut-off valve; 95: a fifth on-off valve; 96: a sixth on-off valve; 97: a seventh on-off valve; 98: an eighth on-off valve; 99: a ninth on-off valve; 910: a tenth on-off valve; 911: an eleventh on-off valve;
100: means for controlling the heat pump unit; 101: a processor; 102: a memory; 103: a communication interface; 104: a bus;
110: and a heat pump unit.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Referring to fig. 1, an embodiment of the disclosure provides a heat pump unit, including a first refrigerant circulation loop, a second refrigerant circulation loop, a first valve group and a second valve group. The first refrigerant circulation loop comprises a first refrigerant pipeline which is sequentially connected with a compressor 1, a condenser 2, a liquid reservoir 3, an indoor fan unit 5 and a shell-and-tube heat exchanger 4. The second refrigerant circulation loop comprises a second refrigerant pipeline which is sequentially connected with the compressor 1, the indoor fan group 5, the liquid reservoir 3 and the shell-and-tube heat exchanger 4. The first valve group is arranged on the first refrigerant pipeline. The second valve group is arranged on the second refrigerant pipeline. Under the condition of refrigeration operation, the first valve group is opened, the second valve group is closed, and the refrigerant flows through the first refrigerant pipeline; or under the condition of heating operation, the first valve group is closed, and the second valve group is opened, so that the refrigerant flows through the second refrigerant pipeline.
Optionally, the condenser 2 comprises an evaporative condenser, and adopts air cooling and water cooling to cool down so as to exchange heat with the refrigerant. The water cooling system comprises a water tank 21, a spray pump 22 and a spray nozzle 23, when water cooling is needed, the spray pump 22 pumps water in the water tank 21 into the spray nozzle 23 positioned at the top of the condenser 2, and sprays the water from the upper part of the condenser 2 to the lower part.
Optionally, the indoor fan group 5 comprises a plurality of indoor heat exchange branches, wherein each indoor heat exchange branch comprises a first indoor heat exchange branch 51 and a second indoor heat exchange branch 52. The first indoor heat exchange branch 51 includes an indoor fan 511, a thermostatic expansion valve 512 and a first solenoid valve 513 which are sequentially communicated, and the second indoor heat exchange branch 52 includes an indoor fan 511 and a second solenoid valve 521 which are sequentially communicated. When the heat pump unit operates in the refrigeration mode, the refrigerant flows through the plurality of first indoor heat exchange branches 51 of the indoor fan unit 5; when the heat pump unit is operating in the heating mode, the refrigerant flows through the plurality of second indoor heat exchange branches 52 of the indoor fan unit 5.
Optionally, the first refrigerant line includes a first line 61, a second line 62, a fourth line 64, a first bypass line 71, and a second bypass line 72. The first line 61 communicates the compressor 1 and the condenser 2. The second line 62 communicates the condenser 2 with the reservoir 3. One end of the fourth pipeline 64 is communicated with the liquid reservoir 3. One end of the first bypass line 71 communicates with the other end of the fourth line 64, and the other end communicates with the plurality of first indoor heat exchanging branches 51 of the indoor fan group 5. One end of the second bypass pipeline 72 is communicated with the plurality of first indoor heat exchange branches 51 of the indoor fan unit 5, and the other end is communicated with the shell-and-tube heat exchanger 4.
Optionally, the first valve group includes a first on-off valve 91, a third on-off valve 93, a fourth on-off valve 94, a fifth on-off valve 95, an eighth on-off valve 98, and a tenth on-off valve 910. The first on-off valve 91 is provided in the first pipe 61. The third on-off valve 93 is provided in the second pipe 62. The fourth on-off valve 94 is provided to the freezing water inlet line 81 communicating with the water inlet pipe 41 of the shell-and-tube heat exchanger 4. The fifth on-off valve 95 is provided to the chilled water outlet line 82 communicating with the outlet pipe 42 of the shell-and-tube heat exchanger 4. The eighth on-off valve 98 is provided to the first bypass pipe 71. A tenth on-off valve 910 is provided in the second bypass line 72.
Specifically, the first refrigerant circulation loop includes a first sub-circulation loop and a second sub-circulation loop. The first sub-cycle comprises a compressor 1, a first pipe 61, a condenser 2, a second pipe 62, a liquid reservoir 3, a third pipe 63 and a shell and tube heat exchanger 4, which are sequentially communicated. The second sub-circulation loop includes a compressor 1, a first pipe 61, a condenser 2, a second pipe 62, a reservoir 3, a fourth pipe 64, a first bypass pipe 71, an indoor fan group 5, a second bypass pipe 72, and a shell-and-tube heat exchanger 4, which are sequentially communicated. Wherein, shell and tube heat exchanger 4 includes inlet tube 41 and outlet pipe 42, and inlet tube 41 intercommunication freezes water inlet line 81, and outlet pipe 42 intercommunication freezes water outlet line 82. The first pipeline 61 is provided with a first on-off valve 91, the second pipeline 62 is provided with a third on-off valve 93, the freezing water inlet pipeline 81 is provided with a fourth on-off valve 94, the freezing water outlet pipeline 82 is provided with a fifth on-off valve 95, the first bypass pipeline 71 is provided with an eighth on-off valve 98, and the second bypass pipeline 72 is provided with a tenth on-off valve 910.
The first sub-circulation loop and the second sub-circulation loop respectively pass through the compressor 1, the first pipeline 61, the condenser 2, the second pipeline 62 and the liquid storage device 3 in sequence, and are split after the liquid storage device 3, wherein the first sub-circulation loop is connected with the third pipeline 63 and the shell-and-tube heat exchanger 4, and the second sub-circulation loop is connected with the fourth pipeline 64, the first bypass pipeline 71, the indoor fan unit 5, the second bypass pipeline 72 and the shell-and-tube heat exchanger 4.
The first pipeline 61 is communicated with the condenser 2 and the compressor 1, the first pipeline 61 is provided with a first on-off valve 91 and a one-way valve 611, and the refrigerant conduction direction of the one-way valve 611 is from the compressor 1 to the condenser 2. The first on-off valve 91 is opened to allow refrigerant to flow from the compressor 1 to the condenser 2.
The second pipeline 62 is communicated with the condenser 2 and the liquid reservoir 3, the second pipeline 62 is provided with a third on-off valve 93, and the third on-off valve 93 can enable the refrigerant to flow from the condenser 2 to the liquid reservoir 3.
The reservoir 3 is provided with a first outlet 31 and a second outlet 32 and the shell and tube heat exchanger 4 is provided with a first inlet 43, a second inlet 44 and a third inlet 45. Both ends of the third pipeline 63 are respectively communicated with the first outlet 31 of the liquid reservoir 3 and the first inlet 43 of the shell-and-tube heat exchanger 4. The first outlet 31 is arranged through the liquid reservoir 3 and is directly communicated with the shell-and-tube heat exchanger 4, so that when the heat pump unit is in a low-load refrigeration mode, the flow of the refrigerant in the refrigerant flow path can be regulated, and the overall performance of the heat pump unit is improved. The fourth pipeline 64 has one end communicated with the second outlet 32 of the liquid reservoir 3 and the other end communicated with the first bypass pipeline 71, and further communicated with the indoor fan unit 5.
One end of the first bypass line 71 communicates with the other end of the fourth line 64, and the other end communicates with the plurality of first indoor heat exchanging branches 51 of the indoor fan group 5. The first bypass line 71 is provided with an eighth on-off valve 98, and the eighth on-off valve 98 is opened to allow the refrigerant to flow from the fourth line 64 to the plurality of first indoor heat exchange branches 51.
The second bypass line 72 has one end connected to the plurality of first indoor heat exchange branches 51 of the indoor fan group 5 and the other end connected to the second inlet 44 of the shell-and-tube heat exchanger 4. The second bypass pipe is provided with a tenth on-off valve 910, and the tenth on-off valve 910 allows the refrigerant to flow from the indoor fan group 5 to the shell-and-tube heat exchanger 4.
Optionally, the second refrigerant line includes a fifth line 65, a third bypass line 73, and a third line 63. The fifth pipeline 65 has one end disposed between the compressor 1 and the condenser 2 and communicated with the first pipeline 61, and the other end communicated with the plurality of second indoor heat exchange branches 52 of the indoor fan group 5. The third bypass line 73 has one end connected to the plurality of second indoor heat exchanging branches 52 of the indoor fan group 5 and the other end connected to the other end of the fourth line 64. The third line 63 communicates between the reservoir 3 and the shell and tube heat exchanger 4.
It should be understood that one end of the fifth pipeline 65 is disposed between the compressor 1 and the condenser 2 and is in communication with the first pipeline 61, which defines a first position of the first pipeline 61 where the fifth pipeline 65 is in communication with the first pipeline 61, and one end of the first pipeline 61 in communication with the compressor 1 is the first end. The first end of the first conduit 61 is a common segment with the first location. The refrigerant in the first refrigerant circulation circuit and the refrigerant in the second refrigerant circulation circuit flow out from the compressor 1 and pass through the common section of the first pipe 61. That is, under the condition of refrigeration operation, the first valve group is opened and the second valve group is closed, so that when the refrigerant flows through the first refrigerant pipeline, the common section belongs to the first refrigerant pipeline; under the condition of heating operation, the first valve group is closed and the second valve group is opened, so that the common section belongs to the second refrigerant pipeline when the refrigerant flows through the second refrigerant pipeline.
Optionally, the second valve group includes a second on-off valve 92, a sixth on-off valve 96, a seventh on-off valve 97, and a ninth on-off valve 99. The second on-off valve 92 is provided in the fifth pipeline 65. The sixth on-off valve 96 is provided in the ground source outlet pipe 84 that communicates with the outlet pipe 42 of the shell-and-tube heat exchanger 4. The seventh on-off valve 97 is provided to the ground source water intake pipe 83 communicating with the water intake pipe 41 of the shell-and-tube heat exchanger 4. The ninth on-off valve 99 is provided in the third bypass line 73.
Specifically, the second refrigerant circulation circuit includes the compressor 1, the first pipe 61 common section, the fifth pipe 65, the indoor fan group 5, the third bypass pipe 73, the fourth pipe 64, the accumulator 3, and the shell-and-tube heat exchanger 4, which are sequentially communicated. Wherein, shell and tube heat exchanger 4 includes inlet tube 41 and outlet pipe 42, and inlet tube 41 intercommunication ground source inlet tube 83, outlet pipe 42 intercommunication ground source outlet tube 84. The fifth pipeline 65 is provided with a second on-off valve 92, the ground source water outlet pipeline 84 is provided with a sixth on-off valve 96, the ground source water inlet pipeline 83 is provided with a seventh on-off valve 97, and the third bypass pipeline 73 is provided with a ninth on-off valve 99.
A first end of the fifth pipe 65 communicates with the first pipe 61, specifically, the first end of the fifth pipe 65 is disposed between the check valve 611 and the first on-off valve 91. A second end of the fifth pipe 65 communicates with a plurality of second indoor heat exchanging branches 52 of the indoor fan group 5. The fifth line 65 is provided with a second on-off valve 92, and the second on-off valve 92 allows the refrigerant to flow from the first line 61 to the fifth line 65. By controlling the opening of the first on-off valve 91 of the first pipe 61 and the second on-off valve 92 of the fifth pipe 65, the flow of the refrigerant from the compressor 1 to the condenser 2 or to the indoor fan group 5 can be restricted, i.e., the first refrigerant circulation circuit or the second refrigerant circulation circuit flow path of the refrigerant can be realized.
The third bypass line 73 has one end connected to the plurality of second indoor heat exchanging branches 52 of the indoor fan group 5 and the other end connected to the other end of the fourth line 64. One end of the third bypass pipeline 73 is communicated with the fourth pipeline 64, and a ninth on-off valve 99 is arranged near the communicated position. It is to be understood that the third bypass line 73 is connected in parallel with the first bypass line 71, and the opening of the eighth on-off valve 98 of the first bypass line 71 or the opening of the ninth on-off valve 99 of the third bypass line 73 can realize the unblocked first refrigerant circulation loop or second refrigerant circulation loop of the refrigerant.
The outdoor environment temperature is low in winter, the heat pump unit starts a heating mode, and the secondary refrigerant of the shell and tube heat exchanger 4 in the heat pump unit provided by the embodiment of the disclosure takes ground source water. The water inlet pipe 41 and the water outlet pipe 42 of the shell-and-tube heat exchanger 4 are respectively communicated with a ground source water inlet pipeline 83 and a ground source water outlet pipeline 84. A fourth bypass line 74 is further provided between the ground source water inlet line 83 and the ground source water outlet line 84 for adjusting the inlet and outlet compression ratio of the compressor 1 in the heating mode of the heat pump unit. The fourth bypass line 74 communicates the ground source water outlet line 84 with the ground source water inlet line 83, and the fourth bypass line 74 is provided with an eleventh on-off valve 911, and the direction of communication of the eleventh on-off valve 911 is from the ground source water inlet line 83 to the ground source water outlet line 84.
Alternatively, the compressor 1 comprises a magnetic levitation compressor or an air levitation compressor.
Alternatively, the shell and tube heat exchanger 4 comprises a flooded shell and tube heat exchanger.
Optionally, the first refrigerant circulation loop comprises a load balancing loop 75, and/or the second refrigerant circulation loop comprises a load balancing loop 75. The load balancing circuit 75 has a first end connected to the first conduit 61 and a second end connected to the shell and tube heat exchanger 4. Specifically, the first end of the load balancing circuit 75 is disposed between the check valve 611 and the first on-off valve 91 of the first pipeline 61, and the second end is communicated with the third inlet 45 of the shell-and-tube heat exchanger 4. The load balancing circuit 75 is provided with a load balancing valve 751, and the load balancing circuit 75 can reduce surge of the heat pump unit.
The heat pump unit also comprises a controller which is in communication connection with each on-off valve so as to control the on-off state and the opening degree of each on-off valve.
As shown in conjunction with fig. 4, an embodiment of the present disclosure provides a method for controlling a heat pump unit, including:
s401, the heat pump unit responds to the starting signal to perform refrigeration operation or heating operation.
S402, under the condition of refrigeration operation, opening a first valve group and closing a second valve group to enable a refrigerant to flow through a first refrigerant pipeline; or under the condition of heating operation, the first valve group is closed, and the second valve group is opened, so that the refrigerant flows through the second refrigerant pipeline.
The heat pump unit comprises two refrigerant circulation loops, wherein the first refrigerant circulation loop flows through an outdoor condenser, and a refrigerant circulation path in the second refrigerant circulation loop avoids the condenser. When the ambient temperature is high, a user sets an operation refrigeration mode of the heat pump unit, and the refrigerant flows through the first refrigerant circulation loop and flows through the condenser to perform heat exchange condensation. When the ambient temperature is low, a user sets a heat pump unit to operate a heating mode, the refrigerant flows in a second refrigerant circulation loop, the flow path avoids the condenser, and the problem that the condenser cannot exchange heat with the refrigerant normally due to the fact that the refrigerant is still controlled to flow through the condenser when the water surface in the condenser is at an icing risk when the temperature is too low is avoided. Optionally, determining the target flow path of the refrigerant according to the cooling or heating mode of the heat pump unit includes: determining a target flow path of the refrigerant as a first refrigerant circulation loop when the heat pump unit is set to a cooling mode; alternatively, when the heat pump unit is set to the heating mode, the target flow path of the refrigerant is determined to be the second refrigerant circulation circuit.
When the refrigeration mode is started, the ambient temperature is higher, and at the moment, the refrigerant flows through the condenser, namely flows through the first refrigerant circulation loop, so that the refrigerant can be better subjected to heat exchange condensation. When the heating mode is started, the ambient temperature is lower, and at the moment, the refrigerant flow path is led to avoid the condenser, namely, the second refrigerant circulation loop flows, so that the water in the condenser can be prevented from freezing, and the normal use of the heat pump unit is prevented from being influenced.
Optionally, in the case of a cooling operation, opening the first valve group and closing the second valve group comprises: the first on-off valve, the third on-off valve, the fourth on-off valve, the fifth on-off valve, the eighth on-off valve and the tenth on-off valve are controlled to be in an open state, and the second on-off valve, the sixth on-off valve, the seventh on-off valve and the ninth on-off valve are controlled to be in a closed state.
Referring to fig. 2, the first refrigerant circulation loop is in a connected state, that is, when the heat pump unit starts the refrigeration mode, the refrigerant circulation path is shown in the figure. Wherein the dashed arrow is the path of the water. The circulation path of the refrigerant in the first sub-circulation loop is as follows: compressor, condenser, liquid reservoir, shell and tube heat exchanger, and compressor. The circulation path of the refrigerant in the second sub-circulation loop is as follows: compressor, condenser, liquid reservoir, indoor cold air unit, shell-and-tube heat exchanger and compressor. And under the condition that the target circulation path flows through the condenser, controlling the first refrigerant circulation loop to be in a communication state, and controlling the second refrigerant circulation loop to be in a disconnection state, namely controlling the first on-off valve, the third on-off valve, the fourth on-off valve, the fifth on-off valve, the eighth on-off valve and the tenth on-off valve to be in an opening state, and controlling the second on-off valve, the sixth on-off valve, the seventh on-off valve and the ninth on-off valve to be in a closing state.
Optionally, in the case of a heating operation, closing the first valve group and opening the second valve group comprises: the second on-off valve, the sixth on-off valve, the seventh on-off valve and the ninth on-off valve are controlled to be in an open state, and the first on-off valve, the third on-off valve, the fourth on-off valve, the fifth on-off valve, the eighth on-off valve and the tenth on-off valve are controlled to be in a closed state.
Referring to fig. 3, the second refrigerant circulation loop is in a connected state, that is, when the heat pump unit starts the heating and cooling mode, the refrigerant circulation path is shown in the figure. Wherein the dashed arrow is the path of the water. The circulation path of the refrigerant in the second refrigerant circulation loop is as follows: compressor, indoor air conditioner unit, liquid storage device, shell and tube heat exchanger and compressor. And under the condition that the target flow path is the avoidance condenser, controlling the second refrigerant circulation loop to be in a communication state, namely controlling the first on-off valve, the third on-off valve, the fourth on-off valve, the fifth on-off valve, the eighth on-off valve and the tenth on-off valve to be in a closed state, and controlling the second on-off valve, the sixth on-off valve, the seventh on-off valve and the ninth on-off valve to be in an open state.
As shown in conjunction with fig. 5, an embodiment of the present disclosure provides another method for controlling a heat pump unit, including:
s501, the heat pump unit responds to a starting signal to perform refrigeration operation or heating operation.
S502, under the condition of refrigeration operation, a controller of the heat pump unit opens a first valve group and closes a second valve group to enable a refrigerant to flow through a first refrigerant pipeline; or under the condition of heating operation, the controller of the heat pump unit closes the first valve group and opens the second valve group to enable the refrigerant to flow through the second refrigerant pipeline.
S503, under the condition that the first valve group is closed and the second valve group is opened, the heat pump unit obtains the water outlet temperature of the water outlet pipe of the shell-and-tube heat exchanger.
S504, the heat pump unit adjusts the compression ratio of the compressor according to the outlet water temperature.
When the heat pump unit operates in a heating mode, the compressor is more energy-saving in order to keep the operation compression ratio of the air inlet side and the air outlet side of the compressor, so that the water inlet valve and the water outlet valve of the shell-and-tube heat exchanger are adjusted to adjust the compression ratio of the compressor.
Optionally, adjusting the compression ratio of the compressor according to the outlet water temperature includes: and the opening degree of the seventh on-off valve and the eleventh on-off valve is regulated by the heat pump unit according to the water outlet temperature.
Optionally, the heat pump unit adjusts the opening degrees of the seventh on-off valve and the eleventh on-off valve according to the outlet water temperature, including:
and the heat pump unit calculates and obtains the exhaust temperature according to the set temperature.
The heat pump unit calculates the temperature difference between the exhaust temperature and the outlet temperature.
And the opening degree of the seventh on-off valve and the eleventh on-off valve is adjusted by the heat pump unit according to the temperature difference and the second preset temperature difference.
Wherein the exhaust temperature T is calculated B =T S +ΔT 1 。T S To set the temperature, deltaT 1 For the first preset temperature difference, 1 ℃ is less than delta T 1 Less than 10 ℃. For example, deltaT 1 =2 ℃, 4 ℃, 5 ℃, 6 ℃, or 9 ℃, etc. Calculating the temperature difference delta t=t between the exhaust temperature and the outlet water temperature B -T C Wherein T is C The temperature of the effluent water. A second preset temperature difference delta T 2 ,1℃<ΔT 2 Less than 10 ℃. For example, deltaT 1 =2 ℃, 4 ℃, 5 ℃, 6 ℃, or 9 ℃, etc. Comparing the temperature difference DeltaT with a second preset temperature difference DeltaT 2 The opening degrees of the seventh on-off valve and the eleventh on-off valve are adjusted.
Optionally, the heat pump unit adjusts the opening degrees of the seventh on-off valve and the eleventh on-off valve according to the temperature difference and the second preset temperature difference, including:
when DeltaT<ΔT 2 The opening degree of the seventh on-off valve is reduced, and the opening degree of the eleventh on-off valve is increased; or,
when DeltaT 2 ≤ΔT<2*ΔT 2 The opening degree of the seventh on-off valve and the eleventh on-off valve is maintained unchanged; or,
when DeltaT is more than or equal to 2 DeltaT 2 The opening degree of the seventh on-off valve is increased, and the opening degree of the eleventh on-off valve is decreased.
When Δt < Δt2, it is indicated that the indoor temperature setting is low, and the compressor has a suction pressure close to a discharge pressure, which is disadvantageous for motor cooling. Therefore, the opening degree of the seventh on-off valve is reduced, and the opening degree of the eleventh on-off valve is increased, so that the water entering the shell-and-tube heat exchanger is reduced, and the water outlet temperature is reduced. Specifically, the seventh on-off valve opening may be reduced by 10% on the basis of the current opening, and the eleventh on-off valve may be increased by 10% on the basis of the current opening. And judging after a preset time interval.
When deltat 2 is less than or equal to deltat <2 x deltat 2, the compression ratio of the compressor is proper, and the compressor saves energy. The opening degrees of the seventh on-off valve and the eleventh on-off valve are maintained unchanged.
When DeltaT is more than or equal to 2 DeltaT 2 The result shows that the temperature of the outlet water is lower, so that the exhaust pressure is far higher than the suction pressure when the compressor is operated, and the energy consumption of the compressor is increased. Therefore, the opening degree of the seventh on-off valve should be increased, and the opening degree of the eleventh on-off valve should be decreased to increase the water outlet temperature. Specifically, the seventh on-off valve opening may be increased by 10% on the basis of the current opening, and the eleventh on-off valve may be decreased by 10% on the basis of the current opening. And judging after a preset time interval.
As shown in connection with fig. 6, an embodiment of the present disclosure provides an apparatus 100 for controlling a heat pump unit, including a processor (processor) 101 and a memory (memory) 102. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 103 and a bus 104. The processor 101, the communication interface 103, and the memory 102 may communicate with each other via the bus 104. The communication interface 103 may be used for information transfer. The processor 101 may invoke logic instructions in the memory 102 to perform the method for controlling the heat pump assembly of the above-described embodiments.
Further, the logic instructions in the memory 102 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 102 is used as a computer readable storage medium for storing a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 101 executes the functional applications and data processing by running the program instructions/modules stored in the memory 102, i.e. implements the method for controlling the heat pump unit in the above-described embodiments.
The memory 102 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. In addition, memory 102 may include high-speed random access memory, and may also include non-volatile memory.
As shown in conjunction with fig. 7, an embodiment of the disclosure provides a heat pump unit 110, and further includes the apparatus 100 for controlling a heat pump unit described above. The apparatus 100 for controlling a heat pump unit is mounted to a heat pump unit body. The mounting relationships described herein are not limited to placement within a product, but include mounting connections to other components of a product, including but not limited to physical, electrical, or signal transmission connections, etc. Those skilled in the art will appreciate that the apparatus 100 for controlling a heat pump unit may be adapted to a viable product body, thereby achieving other viable embodiments.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for controlling a heat pump unit.
The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for controlling a heat pump unit, the heat pump unit comprising: the first refrigerant circulation loop comprises a first refrigerant pipeline which is sequentially connected with a compressor, a condenser, a liquid reservoir, an indoor fan unit and a shell-and-tube heat exchanger; the second refrigerant circulation loop comprises a second refrigerant pipeline which is sequentially connected with the compressor, the indoor fan unit, the liquid reservoir and the shell-and-tube heat exchanger; the first valve group is arranged on the first refrigerant pipeline; the second valve group is arranged on the second refrigerant pipeline;
the method comprises the following steps:
the heat pump unit responds to a starting signal to perform refrigeration operation or heating operation;
under the condition of refrigeration operation, the first valve group is opened, the second valve group is closed, and the refrigerant flows through the first refrigerant pipeline; or under the condition of heating operation, the first valve group is closed, and the second valve group is opened, so that the refrigerant flows through the second refrigerant pipeline.
2. The method according to claim 1, wherein the shell-and-tube heat exchanger is provided with a water inlet pipe and a water outlet pipe; after closing the first valve group and opening the second valve group, the method further comprises:
acquiring the water outlet temperature of a water outlet pipe of the shell-and-tube heat exchanger;
and adjusting the compression ratio of the compressor according to the outlet water temperature.
3. An apparatus for controlling a heat pump unit comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the method for controlling a heat pump unit according to claim 1 or 2 when running the program instructions.
4. A heat pump assembly, comprising:
the first refrigerant circulation loop comprises a first refrigerant pipeline which is sequentially connected with a compressor, a condenser, a liquid reservoir, an indoor fan unit and a shell-and-tube heat exchanger;
the second refrigerant circulation loop comprises a second refrigerant pipeline which is sequentially connected with the compressor, the indoor fan unit, the liquid reservoir and the shell-and-tube heat exchanger;
the first valve group is arranged on the first refrigerant pipeline;
the second valve group is arranged on the second refrigerant pipeline;
under the condition of refrigeration operation, the first valve group is opened, the second valve group is closed, and the refrigerant flows through the first refrigerant pipeline; or under the condition of heating operation, the first valve group is closed, and the second valve group is opened, so that the refrigerant flows through the second refrigerant pipeline.
5. The heat pump assembly of claim 4, wherein,
the indoor fan group comprises a plurality of indoor heat exchange branches, and each indoor heat exchange branch comprises a first indoor heat exchange branch;
the first refrigerant line includes:
a first pipeline which is communicated with the compressor and the condenser;
the second pipeline is communicated with the condenser and the liquid reservoir;
one end of the fourth pipeline is communicated with the liquid storage device;
one end of the first bypass pipeline is communicated with the other end of the fourth pipeline, and the other end of the first bypass pipeline is communicated with a plurality of first indoor heat exchange branches of the indoor fan unit;
and one end of the second bypass pipeline is communicated with a plurality of first indoor heat exchange branches of the indoor fan unit, and the other end of the second bypass pipeline is communicated with the shell-and-tube heat exchanger.
6. The heat pump assembly of claim 5, wherein the first valve block comprises:
the first on-off valve is arranged on the first pipeline;
the third cut-off valve is arranged on the second pipeline;
the fourth break valve is arranged on a freezing water inlet pipeline communicated with the water inlet pipe of the shell-and-tube heat exchanger;
the fifth on-off valve is arranged on a freezing water outlet pipeline communicated with the water outlet pipe of the shell-and-tube heat exchanger;
the eighth on-off valve is arranged on the first bypass pipeline;
and the tenth on-off valve is arranged on the second bypass pipeline.
7. The heat pump assembly of claim 5, wherein,
each indoor heat exchange branch further comprises a second indoor heat exchange branch;
the second refrigerant line includes:
one end of the fifth pipeline is arranged between the compressor and the condenser and is communicated with the first pipeline, and the other end of the fifth pipeline is communicated with a plurality of second indoor heat exchange branches of the indoor fan unit;
one end of the third bypass pipeline is communicated with a plurality of second indoor heat exchange branches of the indoor fan unit, and the other end of the third bypass pipeline is communicated with the other end of the fourth pipeline;
and the third pipeline is communicated with the liquid storage device and the shell-and-tube heat exchanger.
8. The heat pump assembly of claim 7, wherein the second valve block comprises:
the second on-off valve is arranged on the fifth pipeline;
the sixth on-off valve is arranged on a ground source water outlet pipeline communicated with a water outlet pipe of the shell-and-tube heat exchanger;
the seventh on-off valve is arranged on a ground source water inlet pipeline communicated with a water inlet pipe of the shell-and-tube heat exchanger;
and the ninth on-off valve is arranged on the third bypass pipeline.
9. A heat pump assembly according to any one of claims 4 to 8, further comprising a device for controlling a heat pump assembly according to claim 3.
10. A storage medium storing program instructions which, when executed, perform the method for controlling a heat pump unit according to claim 1 or 2.
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CN202310533375.3A CN116499158A (en) | 2023-05-12 | 2023-05-12 | Method and device for controlling heat pump unit, heat pump unit and storage medium |
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CN202310533375.3A CN116499158A (en) | 2023-05-12 | 2023-05-12 | Method and device for controlling heat pump unit, heat pump unit and storage medium |
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