CN109237832B - Water heating system and control method thereof - Google Patents
Water heating system and control method thereof Download PDFInfo
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- CN109237832B CN109237832B CN201811005499.XA CN201811005499A CN109237832B CN 109237832 B CN109237832 B CN 109237832B CN 201811005499 A CN201811005499 A CN 201811005499A CN 109237832 B CN109237832 B CN 109237832B
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- heat exchanger
- water
- water tank
- assembly
- way valve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 206
- 238000010438 heat treatment Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003507 refrigerant Substances 0.000 claims abstract description 91
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000008236 heating water Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The application provides a hot water system and a control method of the hot water system. The hot water system comprises an outdoor unit, wherein the outdoor unit comprises a compressor, a four-way valve and an outdoor heat exchanger. The water heating system also comprises a water tank assembly and an indoor unit assembly. The output of the compressor is connected with a first interface of the four-way valve, a second interface of the four-way valve is connected with an outdoor heat exchanger, and a refrigerant working pipeline is arranged between the water tank assembly and a third interface of the four-way valve. The refrigerant working pipeline is connected from the outdoor heat exchanger and then sequentially passes through the water tank assembly and the indoor unit assembly, and the fourth interface of the four-way valve is connected with the input end of the compressor through a refrigerant return pipeline. By applying the technical scheme of the application, the outdoor unit, the water tank assembly and the indoor unit assembly can be assembled only by connecting the pipelines, and the installation is simple and convenient. In addition, the freedom degree of collocation assembly of the hot water system is higher.
Description
Technical Field
The application relates to the technical field of refrigeration equipment, in particular to a hot water system and a control method of the hot water system.
Background
Heat pump technology is increasingly being used for preparing domestic hot water and for floor heating. The system scheme for preparing domestic hot water generally uses one-to-one system, namely an outdoor unit is connected with a water tank, and the system comprises the following components: a compressor which is used for driving the heat pump system and providing power for the flow of the refrigerant; an air side heat exchanger, also an evaporator, for absorbing heat from the environment; and a condenser for releasing heat absorbed in the environment into the water tank, and heating water in the water tank. The same heat pump principle is used for floor heating.
There are also many systems currently available that can simultaneously produce domestic hot water and provide floor heating. However, the system has more valve members, complex control and correspondingly higher overall cost.
Disclosure of Invention
The embodiment of the application provides a hot water system and a control method of the hot water system, which are used for solving the technical problems of excessive parts and complex installation of the hot water system in the prior art.
The embodiment of the application provides a hot water system, which comprises an outdoor unit, wherein the outdoor unit comprises a compressor, a four-way valve and an outdoor heat exchanger; the hot water system also comprises a water tank assembly and an indoor unit assembly; the output end of the compressor is connected with a first interface of the four-way valve, a second interface of the four-way valve is connected with an outdoor heat exchanger, and a refrigerant working pipeline is arranged between the water tank assembly and a third interface of the four-way valve; the refrigerant working pipeline is connected from the outdoor heat exchanger and then sequentially passes through the water tank assembly and the indoor unit assembly, or the refrigerant working pipeline is connected from the outdoor heat exchanger and then sequentially passes through the indoor unit assembly and the water tank assembly; the fourth interface of the four-way valve is connected with the input end of the compressor through a refrigerant return pipeline.
In one embodiment, a first expansion valve is disposed on the refrigerant working line between the outdoor heat exchanger and the tank assembly.
In one embodiment, a second expansion valve is disposed on the refrigerant working line between the water tank assembly and the indoor unit assembly.
In one embodiment, the refrigerant return line is provided with a gas component.
In one embodiment, the water tank assembly includes a first heat exchanger through which the refrigerant working line flows and a water tank that exchanges heat with the refrigerant working line through the first heat exchanger through the first water circulation line.
In one embodiment, a first water pump is provided on the first water circulation line.
In one embodiment, the indoor unit assembly includes a second heat exchanger through which the refrigerant working line passes and an indoor end device that exchanges heat with the refrigerant working line through the second water circulation line through the second heat exchanger.
In one embodiment, a second water pump is provided on the second water circulation line.
The application also provides a control method of the hot water system, which comprises a compressor, a four-way valve, an outdoor heat exchanger, a water tank assembly and an indoor unit assembly; the output end of the compressor is connected with a first interface of the four-way valve, a second interface of the four-way valve is connected with an outdoor heat exchanger, the outdoor heat exchanger is connected with a water tank assembly through a first pipeline, a refrigerant working pipeline is arranged between the water tank assembly and a third interface of the four-way valve, the refrigerant working pipeline sequentially passes through the water tank assembly and an indoor unit assembly after being connected out of the outdoor heat exchanger, the fourth interface of the four-way valve is connected with the input end of the compressor through a refrigerant backflow pipeline, a first expansion valve is arranged between the outdoor heat exchanger and the water tank assembly on the refrigerant working pipeline, a second expansion valve is arranged between the water tank assembly and the indoor unit assembly on the refrigerant working pipeline, the water tank assembly comprises a first heat exchanger and a water tank, the refrigerant working pipeline flows through the first heat exchanger, the water tank flows through the first water heat exchanger through the first water circulation pipeline, the indoor unit assembly comprises a second heat exchanger and indoor terminal equipment, the refrigerant working pipeline passes through the second heat exchanger, the indoor terminal equipment passes through the second water circulation pipeline and the second heat exchanger, and the second water pump is used for controlling the water pump.
In one embodiment, a control method includes: a first heating mode; the output end of the compressor is communicated with the outdoor heat exchanger through a four-way valve, the first expansion valve is throttled, the second expansion valve is fully opened, the first water pump is operated, and the second water pump is closed.
In one embodiment, the control method includes a second heating mode: the output end of the compressor is communicated with the outdoor heat exchanger through a four-way valve, the first expansion valve is throttled, the second expansion valve is fully opened, the first water pump is closed, and the second water pump is opened.
In one embodiment, a control method includes: in the refrigeration mode, the input end of the compressor is communicated with the outdoor heat exchanger through the four-way valve, the first expansion valve is fully opened, the second expansion valve is throttled, the first water pump is closed, and the second water pump is opened.
In the embodiment, the outdoor unit, the water tank assembly and the indoor unit assembly can be assembled only through pipeline connection, and the installation is simple and convenient. In addition, if only the air conditioning function is needed, the air conditioning device can be realized by connecting the outdoor unit and the indoor unit assembly; if only the domestic hot water function is needed, the water tank assembly and the outdoor unit are connected; if three functions of domestic hot water, refrigeration and heating are to be realized, the outdoor unit, the water tank assembly and the indoor unit assembly are required to be connected for realizing; thus, the freedom degree of collocation and assembly of the hot water system is higher.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic overall construction of an embodiment of a water heating system according to the present application;
FIG. 2 is a schematic structural view of a tank assembly of the hot water system of FIG. 1;
fig. 3 is a schematic view of the indoor unit assembly of the hot water system of fig. 1.
Detailed Description
The present application will be described in further detail with reference to the following embodiments and the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent. The exemplary embodiments of the present application and the descriptions thereof are used herein to explain the present application, but are not intended to limit the application.
Fig. 1 shows a hot water system of the present application, which includes an outdoor unit including a compressor 10, a four-way valve 20, and an outdoor heat exchanger 30. The water heating system further includes a water tank assembly 40 and an indoor unit assembly 50. An output end of the compressor 10 is connected with a first interface of the four-way valve 20, a second interface of the four-way valve 20 is connected with the outdoor heat exchanger 30, and a refrigerant working pipeline 60 is arranged between the water tank assembly 40 and a third interface of the four-way valve 20. The refrigerant working line 60 is connected from the outdoor heat exchanger 30, sequentially passes through the water tank assembly 40 and the indoor unit assembly 50, and is connected with the input end of the compressor 10 through the refrigerant return line 70 through the fourth interface of the four-way valve 20.
By applying the technical scheme of the application, the outdoor unit, the water tank assembly 40 and the indoor unit assembly 50 can be assembled by connecting pipelines, and the installation is simple and convenient. In addition, if only the air conditioning function is required, only the connection of the outdoor unit and the indoor unit assembly 50 may be achieved; if only the domestic hot water function is needed, only the water tank assembly 40 and the outdoor unit are connected; if three functions of domestic hot water, refrigeration and heating are to be realized, the outdoor unit, the water tank assembly 40 and the indoor unit assembly 50 are required to be connected; thus, the freedom degree of collocation and assembly of the hot water system is higher.
It should be noted that, the hot water system of the present application has fewer terminal devices, and only needs to install the outdoor unit, the water tank assembly 40, and the indoor unit assembly 50, and does not need corresponding devices such as a hot water generator and a hot water adapter of a conventional multifunctional unit, thereby saving more space.
In the embodiment, the refrigerant working line 60 is led out from the outdoor heat exchanger 30 and then sequentially passes through the water tank assembly 40 and the indoor unit assembly 50. Because the upper limit of the temperature required by the water tank assembly 40 is higher than that of the indoor unit assembly 50, the refrigerant with higher temperature is heated to the water tank assembly 40 firstly during heating, so that the temperature of hot water is ensured; and then heats the indoor unit assembly 50 with the refrigerant. During refrigeration, the refrigerant is firstly cooled by the indoor unit assembly 50, and then the refrigerant releases heat to the water tank assembly 40 and/or the indoor unit assembly 50, so that the heat energy utilization rate is higher.
Of course, as an alternative embodiment, it is also possible that the refrigerant working line 60 passes through the indoor unit assembly 50 and the water tank assembly 40 in this order after being taken out from the outdoor heat exchanger 30.
As shown in fig. 1, in the present embodiment, a first expansion valve 61 is provided in the refrigerant working line 60 between the outdoor heat exchanger 30 and the tank assembly 40. As a more preferred embodiment, a second expansion valve 62 is provided in the refrigerant working line 60 between the tank assembly 40 and the indoor unit assembly 50. Preferably, the first expansion valve 61 and the second expansion valve 62 are electronic expansion valves. By adopting the hot water system, the whole system can realize the mode switching of refrigerating, heating and water heating only by two electronic expansion valves and one four-way valve 20, and the control is simple.
Alternatively, in the technical solution of the present embodiment, the first expansion valve 61 is disposed in the outdoor unit, and the second expansion valve 62 is disposed in the indoor unit assembly 50. As other alternative embodiments, the arrangement positions of the first expansion valve 61 and the second expansion valve 62 may be flexibly installed to appropriate positions according to the arrangement of the piping.
As a preferred embodiment, the refrigerant return line 70 is provided with a gas component 71. By the gas component 71, the impact of the liquid refrigerant on the compressor 10 can be reduced, and the stability of the system can be ensured.
As shown in fig. 2, in the technical solution of the present embodiment, the water tank assembly 40 includes a first heat exchanger 41 and a water tank 42. The refrigerant working line 60 flows through the first heat exchanger 41, and the water tank 42 exchanges heat with the refrigerant working line 60 through the first water circulation line 43 through the first heat exchanger 41. More preferably, the first water circulation line 43 is provided with a first water pump 44. The convection heat transfer type of the water tank assembly 40 is: cold water in the inner container of the water tank 42 is sent to the first heat exchanger 41 through the first water circulation line 43 by the first water pump 44. The first heat exchanger 41 also has a refrigerant working line 60 for transferring heat to the water passing through the first heat exchanger 41, and the cold water is heated by the first heat exchanger 41 and returned to the inner container of the water tank 42.
As shown in fig. 3, in the technical solution of the present embodiment, the indoor unit assembly 50 includes a second heat exchanger 51 and an indoor terminal device 52. The refrigerant working line 60 passes through the second heat exchanger 51, and the indoor end device 52 exchanges heat with the refrigerant working line 60 through the second heat exchanger 51 by way of the second water circulation line 53. More preferably, the second water circulation line 53 is provided with a second water pump 54. The convection heat exchange type of the indoor unit assembly 50 is: the refrigerant working line 60 passes through the second heat exchanger 51, and generates a phase change in the second heat exchanger 51 to release heat or absorb heat. Meanwhile, the water in the second water circulation line 53 is sent to the second heat exchanger 51 by the second water pump 54, and is sent back to the indoor end device 52 after being heated or cooled in the second heat exchanger 51, and heat exchange is performed between the indoor end device 52 and the indoor air, thereby achieving the effect of heating or cooling the indoor temperature.
Alternatively, the outdoor heat exchanger 30 includes a heat exchanger and a fan disposed opposite the heat exchanger.
The application also provides a control method of the hot water system, and the heat exchange system is used for controlling the hot water system. The hot water system includes a compressor 10, a four-way valve 20, an outdoor heat exchanger 30, a water tank assembly 40, and an indoor unit assembly 50. An output end of the compressor 10 is connected with a first interface of the four-way valve 20, a second interface of the four-way valve 20 is connected with the outdoor heat exchanger 30, and the outdoor heat exchanger 30 is connected with the water tank assembly 40 through a first pipeline 40. A refrigerant working pipeline 60 is arranged between the water tank assembly 40 and the third interface of the four-way valve 20, and the refrigerant working pipeline 60 sequentially passes through the water tank assembly 40 and the indoor unit assembly 50 after being connected from the outdoor heat exchanger 30, and is connected with the input end of the compressor 10 through a refrigerant backflow pipeline 70. A first expansion valve 61 is provided in the refrigerant working line 60 between the outdoor heat exchanger 30 and the tank assembly 40, and a second expansion valve 62 is provided in the refrigerant working line 60 between the tank assembly 40 and the indoor unit assembly 50. The water tank assembly 40 includes a first heat exchanger 41 through which the refrigerant working line 60 flows, and a water tank 42 that exchanges heat with the refrigerant working line 60 through the first heat exchanger 41 by way of a first water circulation line 43, the first water circulation line 43 being provided with a first water pump 44. The indoor unit assembly 50 includes a second heat exchanger 51 and an indoor end device 52, the refrigerant working line 60 passes through the second heat exchanger 51, the indoor end device 52 exchanges heat with the refrigerant working line 60 through a second water circulation line 53 through the second heat exchanger 51, and a second water pump 54 is provided on the second water circulation line 53.
As an alternative embodiment, the control method includes a first heating mode in which the tank assembly 40 is operatively heated. The output end of the compressor 10 is communicated with the outdoor heat exchanger 30 through the four-way valve 20, the first expansion valve 61 is throttled, the second expansion valve 62 is fully opened, the first water pump 44 is operated, and the second water pump 54 is closed. When only the water tank assembly 40 is operated to prepare domestic hot water alone, the second water pump 54 is stopped, the second expansion valve 62 is fully opened, and the high-temperature and high-pressure gaseous refrigerant from the exhaust end of the compressor 10 directly enters the first heat exchanger 41 only through the second heat exchanger 51 and the second expansion valve 62, and in this process, the refrigerant does not exchange heat with the indoor unit assembly 50 because the second water pump 54 is stopped. The first water pump 44 is operated to feed cold water in the water tank assembly 40 to the first heat exchanger 41, exchange heat with the refrigerant, and feed heated water back to the water tank assembly 40. The refrigerant exchanges heat with water to condense Cheng Gaowen high-pressure liquid. Then, the liquid refrigerant flows to the first expansion valve 61 of the outdoor unit, is throttled by the first expansion valve 61, is evaporated in the heat exchanger of the outdoor unit, absorbs heat in the environment, and finally becomes low-temperature low-pressure gas, and returns to the compressor 10 through the air suction pipe of the compressor 10, so that the refrigerant circulation process of the heating water is completed.
As an alternative embodiment, the control method includes a second heating mode in which the indoor unit assembly 50 performs operation heating. The output end of the compressor 10 is communicated with the outdoor heat exchanger 30 through the four-way valve 20, the first expansion valve 61 is throttled, the second expansion valve 62 is fully opened, the first water pump 44 is closed, and the second water pump 54 is opened. When only the indoor unit assembly 50 is operated to prepare domestic hot water alone, the four-way valve 20 is powered down, and the refrigerant is discharged from the input end of the compressor 10 and enters the second heat exchanger 51. At this time, the second water pump 54 is turned on, the refrigerant heats the water in the heat exchanger in the second heat exchanger 51, the hot water is delivered to the indoor terminal device 52 by the second water pump 54, and then the heat is dissipated by the indoor terminal device 52, thereby heating the room. After the heat exchange of the refrigerant in the second heat exchanger 51 is completed, the refrigerant flows through the second expansion valve 62, the second expansion valve 62 is in a fully opened state, the refrigerant is not throttled, the first water pump 44 is simultaneously turned off, and the refrigerant does not perform any heat exchange in the first heat exchanger 41. The refrigerant then flows to the outdoor unit first expansion valve 61. After the first expansion valve 61 throttles and depressurizes, heat exchange is performed in the outdoor heat exchanger 30, and the low-temperature low-pressure gas is finally converted into low-temperature low-pressure gas, and the low-pressure gas returns to the compressor 10 through the input end of the compressor 10, thereby completing the refrigerant circulation process of heating.
As an alternative embodiment, the control method includes a cooling mode in which the input end of the compressor 10 is communicated with the outdoor heat exchanger 30 through the four-way valve 20, the first expansion valve 61 is fully opened, the second expansion valve 62 is throttled, the first water pump 44 is closed, and the second water pump 54 is opened. The four-way valve 20 of the outdoor unit is electrified, the refrigerant enters the outdoor heat exchanger 30 through the exhaust pipe of the compressor 10, the refrigerant of the outdoor heat exchanger 30 condenses and releases heat in the outdoor heat exchanger 30, and the refrigerant passes through the first expansion valve 61. At this time, the first expansion valve 61 is in a fully opened state, and does not function as a throttle. When passing through the first heat exchanger 41, the water pump of the first heat exchanger 41 is in a closed state, the refrigerant does not exchange heat, and directly flows to the second expansion valve 62 of the indoor unit assembly 50, and is changed into a refrigerant with low temperature, low pressure gas and liquid phases through the throttling of the second expansion valve 62, and exchanges heat in the second heat exchanger 51, and at the moment, the indoor terminal equipment 52 is in an open state. The indoor end equipment 52 delivers the prepared cold water to the indoor end equipment 52, and the cold energy is transferred to the indoor through the indoor end equipment 52, so that the indoor is refrigerated and cooled. The refrigerant discharged from the second heat exchanger 51 is changed into low-temperature low-pressure gas, and the gas is returned to the compressor 10 through the suction pipe of the compressor 10, thereby completing the refrigerant cycle process of the one refrigeration.
In the technical scheme of the application, the three functions of water heating, water heating and water cooling only need to control the power on and off of the second water pump 54 and the first water pump 44, and the full opening of the first expansion valve 61 and the second expansion valve 62 or the automatic adjustment to complete the random switching of the modes.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations can be made to the embodiments of the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The hot water system is characterized by comprising an outdoor unit, wherein the outdoor unit comprises a compressor (10), a four-way valve (20) and an outdoor heat exchanger (30); the hot water system also comprises a water tank assembly (40) and an indoor unit assembly (50);
the output end of the compressor (10) is connected with a first interface of the four-way valve (20), a second interface of the four-way valve (20) is connected with the outdoor heat exchanger (30), and a refrigerant working pipeline (60) is arranged between the water tank assembly (40) and a third interface of the four-way valve (20);
the refrigerant working pipeline (60) sequentially passes through the water tank assembly (40) and the indoor unit assembly (50) after being connected out of the outdoor heat exchanger (30), or the refrigerant working pipeline (60) sequentially passes through the indoor unit assembly (50) and the water tank assembly (40) after being connected out of the outdoor heat exchanger (30);
the fourth interface of the four-way valve (20) is connected with the input end of the compressor (10) through a refrigerant return pipeline (70);
a first expansion valve (61) is arranged between the outdoor heat exchanger (30) and the water tank assembly (40) on the refrigerant working pipeline (60), a second expansion valve (62) is arranged between the water tank assembly (40) and the indoor unit assembly (50) on the refrigerant working pipeline (60), the first expansion valve (61) is arranged in an outdoor unit, and the second expansion valve (62) is arranged in the indoor unit assembly (50);
the hot water system has only an air conditioning function: -connecting only the outdoor unit and the indoor unit assembly (50);
the hot water system has the function of only needing domestic hot water: connecting only the water tank assembly (40) and the outdoor unit;
the hot water system has three functions of realizing domestic hot water, refrigeration and heating: and connecting the outdoor unit, the water tank assembly (40) and the indoor unit assembly (50).
2. The water heating system according to claim 1, characterized in that a gas component (71) is provided on the refrigerant return line (70).
3. The water heating system according to claim 1, wherein the water tank assembly (40) comprises a first heat exchanger (41) and a water tank (42), the refrigerant working line (60) flowing through the first heat exchanger (41), the water tank (42) flowing through the first heat exchanger (41) through a first water circulation line (43) in heat exchange relationship with the refrigerant working line (60).
4. A hot water system according to claim 3, characterized in that the first water circulation line (43) is provided with a first water pump (44).
5. The hot water system according to claim 1, wherein the indoor unit assembly (50) comprises a second heat exchanger (51) and an indoor end device (52), the refrigerant working line (60) passing through the second heat exchanger (51), the indoor end device (52) being in heat exchange with the refrigerant working line (60) through a second water circulation line (53) passing through the second heat exchanger (51).
6. The water heating system according to claim 5, characterized in that a second water pump (54) is provided on the second water circulation line (53).
7. A control method of a hot water system, characterized in that the hot water system comprises a compressor (10), a four-way valve (20), an outdoor heat exchanger (30), a water tank assembly (40) and an indoor unit assembly (50); the output end of the compressor (10) is connected with a first interface of the four-way valve (20), a second interface of the four-way valve (20) is connected with the outdoor heat exchanger (30), the outdoor heat exchanger (30) is connected with the water tank assembly (40) through a first pipeline, a refrigerant working pipeline (60) is arranged between the water tank assembly (40) and a third interface of the four-way valve (20), the refrigerant working pipeline (60) sequentially passes through the water tank assembly (40) and the indoor unit assembly (50) after being connected from the outdoor heat exchanger (30), a fourth interface of the four-way valve (20) is connected with the input end of the compressor (10) through a refrigerant reflux pipeline (70), a first expansion valve (61) is arranged between the outdoor heat exchanger (30) and the water tank assembly (40) on the refrigerant working pipeline (60), a refrigerant working pipeline (60) is arranged between the water tank assembly (40) and the indoor unit assembly (40), a refrigerant working pipeline (41) is arranged between the second expansion valve (42) and the water tank assembly (40), the water tank (42) flows through the first heat exchanger (41) through the first water circulation pipeline (43) to exchange heat with the refrigerant working pipeline (60), a first water pump (44) is arranged on the first water circulation pipeline (43), the indoor unit component (50) comprises a second heat exchanger (51) and indoor end equipment (52), the refrigerant working pipeline (60) passes through the second heat exchanger (51), the indoor end equipment (52) passes through the second heat exchanger (51) through a second water circulation pipeline (53) to exchange heat with the refrigerant working pipeline (60), a second water pump (54) is arranged on the second water circulation pipeline (53), and the control method is used for controlling the hot water system.
8. The control method according to claim 7, characterized in that the control method includes: a first heating mode;
the output end of the compressor (10) is communicated with the outdoor heat exchanger (30) through the four-way valve (20), the first expansion valve (61) is throttled, the second expansion valve (62) is fully opened, the first water pump (44) is operated, and the second water pump (54) is closed.
9. The control method according to claim 7, characterized in that the control method includes a second heating mode:
the output end of the compressor (10) is communicated with the outdoor heat exchanger (30) through the four-way valve (20), the first expansion valve (61) is throttled, the second expansion valve (62) is fully opened, the first water pump (44) is closed, and the second water pump (54) is opened.
10. The control method according to claim 7, characterized in that the control method includes:
in a refrigeration mode, an input end of the compressor (10) is communicated with the outdoor heat exchanger (30) through the four-way valve (20), the first expansion valve (61) is fully opened, the second expansion valve (62) is throttled, the first water pump (44) is closed, and the second water pump (54) is opened.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811005499.XA CN109237832B (en) | 2018-08-30 | 2018-08-30 | Water heating system and control method thereof |
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| CN201811005499.XA CN109237832B (en) | 2018-08-30 | 2018-08-30 | Water heating system and control method thereof |
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| CN109237832A CN109237832A (en) | 2019-01-18 |
| CN109237832B true CN109237832B (en) | 2023-08-18 |
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| CN109869800A (en) * | 2019-03-18 | 2019-06-11 | 天津商业大学 | A kind of high temperature heat pump heating system with subcooler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201028884Y (en) * | 2007-05-12 | 2008-02-27 | 珠海格力电器股份有限公司 | Multi-connected air conditioning unit capable of refrigerating, heating and heating water simultaneously |
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| CN101655281A (en) * | 2008-08-22 | 2010-02-24 | 珠海格力电器股份有限公司 | Heat pump hot water air conditioning unit and working method thereof |
| CN103822398A (en) * | 2012-11-16 | 2014-05-28 | 广东美的暖通设备有限公司 | Hot water unit of heat pump air conditioner |
| CN105180304A (en) * | 2015-10-20 | 2015-12-23 | 青岛海信日立空调系统有限公司 | Air-conditioning outdoor unit, multifunctional air-conditioning system and working method thereof |
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| CN201028884Y (en) * | 2007-05-12 | 2008-02-27 | 珠海格力电器股份有限公司 | Multi-connected air conditioning unit capable of refrigerating, heating and heating water simultaneously |
| CN101655281A (en) * | 2008-08-22 | 2010-02-24 | 珠海格力电器股份有限公司 | Heat pump hot water air conditioning unit and working method thereof |
| CN101644508A (en) * | 2009-06-30 | 2010-02-10 | 广东美的电器股份有限公司 | Multi-connected air conditioner multifunctional system for cold water and hot water |
| CN103822398A (en) * | 2012-11-16 | 2014-05-28 | 广东美的暖通设备有限公司 | Hot water unit of heat pump air conditioner |
| CN105180304A (en) * | 2015-10-20 | 2015-12-23 | 青岛海信日立空调系统有限公司 | Air-conditioning outdoor unit, multifunctional air-conditioning system and working method thereof |
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| CN109237832A (en) | 2019-01-18 |
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