CN112484339B - Domestic hot water, cold supply and heat supply combined supply system - Google Patents

Domestic hot water, cold supply and heat supply combined supply system Download PDF

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Publication number
CN112484339B
CN112484339B CN202011449799.4A CN202011449799A CN112484339B CN 112484339 B CN112484339 B CN 112484339B CN 202011449799 A CN202011449799 A CN 202011449799A CN 112484339 B CN112484339 B CN 112484339B
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heat exchanger
hot water
heat
supply
domestic hot
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CN112484339A (en
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石文星
王文涛
姜思航
李先庭
王宝龙
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Tsinghua University
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Tsinghua University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

The invention provides a domestic hot water, cold supply and heat supply combined supply system, and belongs to the technical field of domestic hot water and air conditioning systems. The domestic hot water, cold supply and heat supply combined supply system comprises a heat pump unit, a domestic hot water user end, a municipal water supply end and an air conditioner tail end, wherein a compressor, a first heat exchanger, a throttling device and a second heat exchanger of the heat pump unit are sequentially connected to form a first closed loop, the air conditioner tail end and the second heat exchanger are connected to form a second closed loop, an outlet of the municipal water supply end is connected with a first end of a first main pipeline, a second end of the first main pipeline is connected with first ends of a first parallel branch and a second parallel branch respectively, and the first heat exchanger and the second heat exchanger are correspondingly connected to the first parallel branch and the second parallel branch. The invention realizes the combined supply of domestic hot water, cold supply and heat supply, simplifies the system structure, has simpler system control, saves the consumable of system equipment, reduces the installation space and is beneficial to saving energy.

Description

Domestic hot water, cold supply and heat supply combined supply system
Technical Field
The invention relates to the technical field of domestic hot water and air conditioning systems, in particular to a domestic hot water, cold supply and heat supply combined supply system.
Background
Along with the improvement of living standard, the demands of people for air conditioning cold and hot water and living hot water are also increasing, which promotes the popularization of air conditioning and hot water systems. The traditional supply mode adopts a heat pump unit to provide cold and hot water for an air conditioner, and then a unit is added independently to prepare domestic hot water. However, the scheme needs to adopt two sets of systems, so that the installation complexity and the occupied area are increased, the equipment investment cost is increased, and a large amount of condensation heat is generated when the heat pump unit operates in a refrigerating mode, and the two independent systems cannot be used for utilizing the energy, so that the energy is wasted to a certain extent.
In order to simplify the system and improve the energy utilization degree, a condensing heat recovery unit appears, and the condensing heat can be recovered and utilized in a cooling mode, so that the energy utilization degree is improved to a certain extent, but the condensing heat recovery unit still has certain defects: the system capable of meeting the demands of refrigeration and domestic hot water simultaneously has more components, the system structure and the control strategy are complex, and the domestic hot water supply in a heat supply mode can not be realized.
Disclosure of Invention
The invention provides a domestic hot water, cold supply and heat supply combined supply system which can realize the combined supply of domestic hot water, cold supply and heat supply on the premise of simplifying the system structure.
The invention provides a domestic hot water, cold supply and heat supply combined supply system which comprises a heat pump unit, a domestic hot water user end, a municipal water supply end and an air conditioner tail end, wherein the heat pump unit comprises a compressor, a first heat exchanger, a throttling device and a second heat exchanger, the compressor, the first heat exchanger, the throttling device and the second heat exchanger are sequentially connected to form a first closed loop, and the air conditioner tail end and the second heat exchanger are connected to form a second closed loop; the outlet of municipal water supply end links to each other with the first end of first main line, the second end of first main line links to each other with the first end of first parallel branch road and second parallel branch road respectively, first parallel branch road with the second end of second parallel branch road links to each other with the first end of second main line respectively, the second end of second main line with the entry of domestic hot water user end links to each other, first heat exchanger the second heat exchanger corresponds to be connected first parallel branch road on the second parallel branch road.
According to the domestic hot water, cold supply and heat supply combined supply system provided by the invention, the first heat exchanger comprises a first heat exchanger water channel, a first heat exchanger refrigerant channel, an air channel and a fan, and two ends of the first heat exchanger refrigerant channel are respectively connected with the compressor and the throttling device correspondingly; the two ends of the first heat exchanger water channel are respectively and correspondingly connected with the second end of the first main pipeline and the first end of the second main pipeline to form the first parallel branch, and the fan is connected with the air channel.
According to the domestic hot water, cold supply and heat supply combined supply system provided by the invention, the second heat exchanger comprises a second heat exchanger first water channel, a second heat exchanger refrigerant channel and a second heat exchanger second water channel, and two ends of the second heat exchanger first water channel are respectively connected with the tail end of the air conditioner to form the second closed loop; two ends of the second heat exchanger refrigerant channel are respectively connected with the compressor and the throttling device correspondingly; and two ends of a second water channel of the second heat exchanger are respectively correspondingly connected with the second end of the first main pipeline and the first end of the second main pipeline to form the second parallel branch.
The domestic hot water, cold supply and heat supply combined supply system provided by the invention further comprises a third heat exchanger, wherein the third heat exchanger comprises a third heat exchanger water channel and a third heat exchanger refrigerant channel, the third heat exchanger refrigerant channel is connected to a connecting pipeline between the throttling device and the second heat exchanger refrigerant channel, and the third heat exchanger water channel is connected to a connecting pipeline between the first water channel of the second heat exchanger and the tail end of the air conditioner.
According to the domestic hot water, cold supply and heat supply combined supply system provided by the invention, a first water pump is arranged on the first main pipeline or the second main pipeline; a second water pump is arranged on the second closed loop; a first valve is arranged on the first parallel branch; and a second valve is arranged on the second parallel branch.
The domestic hot water, cold supply and heat supply combined supply system provided by the invention further comprises a domestic hot water circulation branch, wherein the first end of the domestic hot water circulation branch is connected with an outlet of a domestic hot water user end, and the second end of the domestic hot water circulation branch is connected with the first main pipeline;
A third valve is arranged on the first main pipeline and is arranged on the first main pipeline between the outlet of the municipal water supply end and the second end of the domestic hot water circulation branch; a fourth valve is arranged on the domestic hot water circulation branch;
When the first water pump is arranged on the first main pipeline, the first water pump is arranged on the first main pipeline between the first end of the first parallel branch and the second end of the domestic hot water circulation branch.
According to the domestic hot water, cold supply and heat supply combined supply system provided by the invention, the heat pump unit comprises a four-way reversing valve, and the compressor is connected with the first heat exchanger and the second heat exchanger through the four-way reversing valve.
According to the domestic hot water, cold supply and heat supply combined supply system provided by the invention, an auxiliary heat source is further arranged at the inlet of the domestic hot water user side.
The above technical solutions in the embodiments of the present invention have at least one of the following technical effects:
The invention provides a domestic hot water, cold supply and heat supply combined supply system, which is characterized in that a compressor, a first heat exchanger, a throttling device and a second heat exchanger are sequentially connected to form a first closed loop, the tail end of an air conditioner is connected with the second heat exchanger to form a second closed loop, the first end of a first main pipeline is connected with the outlet of a municipal water supply end, the second end of the first main pipeline is respectively connected with the first ends of a first parallel branch and a second parallel branch, the second ends of the first parallel branch and the second parallel branch are respectively connected with the first end of a second main pipeline, the second end of the second main pipeline is connected with the inlet of a domestic hot water user end, and the first heat exchanger and the second heat exchanger are correspondingly connected on the first parallel branch and the second parallel branch; during cooling operation, the heat discharged by the first closed loop can be recovered through the first heat exchanger, so that the requirements of cooling and domestic hot water users are met; when the system is in heating operation, the condensation heat of the first closed loop can be absorbed through the second heat exchanger, so that the requirements of heat supply and domestic hot water user terminals are met simultaneously, and further the combined supply of domestic hot water, cold supply and heat supply is realized.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a domestic hot water, cold and heat combined supply system provided by the invention;
FIG. 2 is a schematic diagram of a heating mode of the present invention;
FIG. 3 is a schematic diagram of the cooling mode of the present invention;
FIG. 4 is a schematic diagram of the heating and once-through domestic hot water modes of the present invention;
FIG. 5 is a schematic diagram of the cold and direct flow domestic hot water modes of the present invention;
FIG. 6 is a schematic diagram of a heating and hot water tank cycle heating domestic hot water pattern of the present invention;
FIG. 7 is a schematic view of the circulating heating type domestic hot water supply and heating tank of the present invention;
FIG. 8 is a schematic diagram of a domestic hot water, cooling and heating combined supply system with a superheating section according to the invention.
Reference numerals:
1: a compressor; 2: a four-way reversing valve; 3: a first heat exchanger;
31: first heat exchanger water passage 32: first heat exchanger refrigeration 33: an air passage;
A lane; a reagent channel;
34: a blower; 4: an air conditioner tail end; 5: a throttle device;
61: a first water pump; 62: a second water pump; 71: a first valve;
72: a second valve; 73: a third valve; 74: a fourth valve;
8: municipal water supply end; 9: a second heat exchanger; 91: second heat exchanger first
A water passage;
92: second heat exchanger refrigeration 93: second heat exchanger second 10: a domestic hot water user terminal;
a reagent channel; a water passage;
11: a third heat exchanger; 111: third heat exchanger water pass 112: third heat exchanger refrigeration
A lane; and (3) an agent channel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The domestic hot water, cold and heat combined supply system of the present invention is described below with reference to fig. 1 to 8, and includes a heat pump unit, an air conditioning terminal 4, a municipal water supply terminal 8, and a domestic hot water user terminal 10. The heat pump unit comprises a compressor 1, a first heat exchanger 3, a throttling device 5 and a second heat exchanger 9, wherein the compressor 1, the first heat exchanger 3, the throttling device 5 and the second heat exchanger 9 are sequentially connected to form a first closed loop, and the first closed loop is a heat pump circulation loop. The air conditioning terminal 4 and the second heat exchanger 9 are connected to form a second closed loop, and the second closed loop is an air conditioning water circulation loop. Wherein, the export of municipal administration water supply end 8 links to each other with the first end of first main line, and the second end of first main line links to each other with the first end of first parallel branch road and second parallel branch road respectively, and the second end of first parallel branch road and second parallel branch road links to each other with the first end of second main line respectively, and the second end of second main line links to each other with the entry of domestic hot water user end 10, and first heat exchanger 3 is connected on first parallel branch road, and second heat exchanger 9 is connected on the second parallel branch road.
During cooling operation, the heat discharged by the first closed loop can be recovered through the first heat exchanger 3, so that the requirements of a user side for cooling and domestic hot water are met; when the system is in heating operation, the condensation heat of the first closed loop can be absorbed through the second heat exchanger 9, so that the requirements of heat supply and domestic hot water user terminals are met simultaneously, and further the combined supply of domestic hot water, cold supply and heat supply is realized.
In some embodiments of the present invention, the first heat exchanger 3 includes a first heat exchanger water passage 31, a first heat exchanger refrigerant passage 32, an air passage 33, and a blower fan 34, wherein both ends of the first heat exchanger refrigerant passage 32 are respectively connected with the compressor 1 and the throttle device 5. The two ends of the first heat exchanger water channel 31 are respectively and correspondingly connected with the second end of the first main pipeline and the first end of the second main pipeline to form a first parallel branch. A blower 34 is connected to the air passage 33.
The medium flowing through the first heat exchanger water passage 31 is water, and the medium flowing through the first heat exchanger refrigerant passage 32 is a refrigerant. That is, heat discharged from the first closed loop can be recovered through heat exchange between the first heat exchanger water channel 31 and the first heat exchanger refrigerant channel 32, so as to prepare domestic hot water, thereby meeting the requirements of the domestic hot water user side.
The fan 34 can convey air through the air channel 33, so that the air exchanges heat with the first heat exchanger water channel 31 and the first heat exchanger refrigerant channel 32, and any two-to-two heat exchange of three fluid media of air, water and refrigerant can be realized.
In some embodiments of the present invention, the second heat exchanger 9 includes a second heat exchanger first water passage 91, a second heat exchanger refrigerant passage 92, and a second heat exchanger second water passage 93, wherein both ends of the second heat exchanger first water passage 91 are respectively connected with the air conditioning terminal 4 to form a second closed loop. Both ends of the second heat exchanger refrigerant passage 92 are respectively connected to the compressor 1 and the throttle device 5. Two ends of the second water channel 93 of the second heat exchanger are respectively correspondingly connected with the second end of the first main pipeline and the first end of the second main pipeline to form a second parallel branch. The medium flowing in the first water channel 91 of the second heat exchanger may be a circulating medium such as water and a coolant, the medium flowing in the second water channel 93 of the second heat exchanger is water, and the medium flowing in the refrigerant channel 92 of the second heat exchanger is a refrigerant. That is, the heat of condensation of the first closed loop can be absorbed by the heat exchange between the second heat exchanger first water channel 91, the second heat exchanger second water channel 93 and the second heat exchanger refrigerant channel 92, thereby meeting the demands of the domestic hot water user side and the air conditioner terminal heat supply user.
Specifically, the first water pump 61 may be provided on the first main pipe or the second main pipe according to actual use requirements. In the present embodiment, the first water pump 61 is provided on the first main pipe. That is, the outlet of the municipal water supply end 8 is connected to two parallel branches (a first parallel branch and a second parallel branch, respectively) through a first main pipeline, the two parallel branches respectively pass through the first heat exchanger water channel 31 and the second heat exchanger second water channel 93, and then the two parallel branches are converged at the second main pipeline and connected to the inlet of the domestic hot water user end 10 through the second main pipeline.
Wherein a first valve 71 is provided on the first parallel branch. A second valve 72 is provided in the second parallel branch.
In some embodiments of the present invention, the system further comprises a domestic hot water circulation branch, a first end of which is connected to the outlet of the domestic hot water user terminal 10, and a second end of which is connected to the first main pipe. The domestic hot water circulation branch can form a hot water tank circulation heating type domestic hot water loop together with the first main pipeline, the second main pipeline, the first parallel branch and the second parallel branch.
Wherein, be equipped with the third valve 73 on first main line, the third valve 73 sets up in the first main line between the export of municipal administration water supply end 8 and the second end of life hot water circulation branch road. A fourth valve 74 is provided in the domestic hot water circulation branch.
When the first water pump 61 is disposed on the first main pipeline, the first water pump 61 is disposed on the first main pipeline between the first parallel branch and the domestic hot water circulation branch, that is, the second end of the domestic hot water circulation branch is located between the first water pump 61 and the third valve 73.
In some embodiments of the invention, the system further comprises a third heat exchanger 11, the third heat exchanger 11 comprising a third heat exchanger water channel 111 and a third heat exchanger refrigerant channel 112, wherein the third heat exchanger refrigerant channel 112 is connected to the connection between the restriction 5 and the second heat exchanger refrigerant channel 92, the third heat exchanger water channel 111 is connected to the connection between the second heat exchanger first water channel 91 and the air conditioning end 4. The medium flowing through the third heat exchanger water channel 111 may be a circulating medium such as water or a coolant, and the medium flowing through the third heat exchanger refrigerant channel 112 may be a refrigerant.
In some embodiments of the present invention, the heat pump unit includes a four-way reversing valve 2, and the compressor 1 is connected to the first heat exchanger refrigerant passage 32 of the first heat exchanger 3 and the second heat exchanger refrigerant passage 92 of the second heat exchanger 9 through the four-way reversing valve 2. By adjusting the four-way selector valve 2, the circulation direction of the medium in the first closed loop can be adjusted.
In a specific embodiment of the present invention, a second water pump 62 is also connected to the second closed loop to provide cyclical power to the second closed loop.
In the embodiment of the present invention, an auxiliary heat source is further provided at the inlet of the domestic hot water user terminal 10, which can be used for further heating the hot water flowing into the domestic hot water user terminal 10, so as to meet the demands of the domestic hot water user.
The modes of operation of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 2 is a schematic diagram of the heating mode of the present invention. When the air conditioner end 4 needs to supply heat, the second water pump 62 is turned on, the first water pump 61 is turned off, the first valve 71, the second valve 72, the third valve 73 and the fourth valve 74 are turned off, and the fan 34 on the first heat exchanger 3 is operated.
At this time, the compressor 1 is started, and the four-way reversing valve 2 is adjusted so that the second heat exchanger 9 becomes a condenser and the first heat exchanger 3 becomes an evaporator; under the action of the second water pump 62, the heat supply circulating liquid flows through the first water channel 91 of the second heat exchanger, exchanges heat with the refrigerant channel 92 of the second heat exchanger to absorb heat, flows through the tail end 4 of the air conditioner to release heat, returns to the first water channel 91 of the second heat exchanger to absorb heat continuously, and circulates in this way; at the same time, the first heat exchanger 3 exchanges heat with the first heat exchanger refrigerant passage 32 by the fan 34 thereof, so that the first heat exchanger refrigerant passage 32 absorbs heat from the outdoor air.
Fig. 3 is a schematic diagram of the cooling mode of the present invention. When the air conditioner end 4 needs to supply cold, the second water pump 62 is turned on, the first water pump 61 is turned off, the first valve 71, the second valve 72, the third valve 73 and the fourth valve 74 are turned off, and the fan 34 on the first heat exchanger 3 is operated.
At this time, the compressor 1 is started, and the four-way reversing valve 2 is adjusted so that the first heat exchanger 3 becomes a condenser and the second heat exchanger 9 becomes an evaporator; under the action of the second water pump 62, the cold circulation liquid flows through the first water channel 91 of the second heat exchanger, exchanges heat with the refrigerant channel 92 of the second heat exchanger to release heat, flows through the tail end 4 of the air conditioner to absorb heat, returns to the first water channel 91 of the second heat exchanger to release heat continuously, and circulates in this way; at the same time, the first heat exchanger 3 exchanges heat with the first heat exchanger refrigerant passage 32 by the fan 34 thereof, releasing heat into the outdoor air.
Fig. 4 is a schematic diagram of the heating and direct-flow domestic hot water modes of the present invention. When the air conditioner terminal 4 needs to supply heat and the domestic hot water user terminal 10 needs domestic hot water, the second valve 72 is opened, the first valve 71 is closed, the second water pump 62 and the first water pump 61 are opened, and the fan 34 on the first heat exchanger 3 is operated.
At this time, the compressor 1 is started, and the four-way reversing valve 2 is adjusted so that the second heat exchanger 9 becomes a condenser and the first heat exchanger 3 becomes an evaporator; under the action of the second water pump 62, the heat supply circulating liquid flows through the first water channel 91 of the second heat exchanger, exchanges heat with the refrigerant channel 92 of the second heat exchanger to absorb heat, flows through the tail end 4 of the air conditioner to release heat, returns to the first water channel 91 of the second heat exchanger to absorb heat continuously, and circulates in this way; at the same time, the first heat exchanger 3 exchanges heat with the first heat exchanger refrigerant channel 32 under the action of the fan 34, so that the first heat exchanger refrigerant channel 32 absorbs heat from the outdoor air; meanwhile, under the action of the first water pump 61, the domestic hot water supply starts from the municipal water supply end 8, flows through the second heat exchanger second water channel 93, exchanges heat with the second heat exchanger refrigerant channel 92 to absorb heat, and then flows to the domestic hot water user end 10.
Fig. 5 is a schematic diagram of the cooling and direct-flow domestic hot water mode of the present invention. When the air conditioning terminal 4 needs to supply cold and the domestic hot water user terminal 10 needs domestic hot water, the first valve 71 is opened, the second valve 72 is closed, and the first water pump 61 and the second water pump 62 are respectively opened.
At this time, the compressor 1 is started, and the four-way reversing valve 2 is adjusted so that the first heat exchanger 3 becomes a condenser and the second heat exchanger 9 becomes an evaporator; under the action of the second water pump 62, the cold circulation liquid flows through the first water channel 91 of the second heat exchanger, exchanges heat with the refrigerant channel 92 of the second heat exchanger to release heat, flows through the tail end 4 of the air conditioner to absorb heat, returns to the first water channel 91 of the second heat exchanger to release heat continuously, and circulates in this way; meanwhile, the domestic hot water supply starts from the municipal water supply end 8 under the action of the second water pump 62, flows through the first heat exchanger water channel 31, exchanges heat with the first heat exchanger refrigerant channel 32 to absorb heat, and then flows to the domestic hot water user end 10. At this time, if the heat required to be released by the first heat exchanger 3 as a condenser is greater than the heat consumption of the domestic hot water user, the fan 34 on the first heat exchanger 3 is turned on to exchange heat between the air and the first heat exchanger refrigerant channel 32, and release the heat to the outdoor air; otherwise, the blower 34 need not be turned on.
FIG. 6 is a schematic diagram of the circulating heating type domestic hot water mode of the heating and hot water tank of the present invention. When the air conditioner terminal 4 needs to supply heat and the domestic hot water user terminal 10 needs domestic hot water, the second valve 72 and the fourth valve 74 are opened, the first valve 71 and the third valve 73 are closed, the first water pump 61 and the second water pump 62 are respectively opened, and the fan 34 on the first heat exchanger 3 is operated.
At this time, the compressor 1 is started, and the four-way reversing valve 2 is adjusted so that the second heat exchanger 9 becomes a condenser and the first heat exchanger 3 becomes an evaporator; under the action of the second water pump 62, the heat supply circulating liquid flows through the first water channel 91 of the second heat exchanger, exchanges heat with the refrigerant channel 92 of the second heat exchanger to absorb heat, flows through the tail end 4 of the air conditioner to release heat, returns to the first water channel 91 of the second heat exchanger to absorb heat continuously, and circulates in this way; at the same time, the first heat exchanger 3 exchanges heat with the first heat exchanger refrigerant channel 32 under the action of the fan 34, so that the first heat exchanger refrigerant channel 32 absorbs heat from the outdoor air; meanwhile, under the action of the first water pump 61, the domestic hot water flows through the second water channel 93 of the second heat exchanger, exchanges heat with the refrigerant channel 92 of the second heat exchanger to absorb heat, and then flows to the domestic hot water user terminal 10, and the domestic hot water is circulated and reciprocated in this way; when the water storage capacity of the domestic hot water user terminal 10 is insufficient, the third valve 73 is opened, the fourth valve 74 is closed, and the other parts are kept unchanged, and under the action of the first water pump 61, the domestic hot water supply starts from the municipal water supply 8, flows through the second heat exchanger second water channel 93, exchanges heat with the second heat exchanger refrigerant channel 92 to absorb heat, and then flows to the domestic hot water user terminal 10 to increase the water storage capacity.
FIG. 7 is a schematic diagram of the circulating heating type domestic hot water supply mode of the cold and hot water tanks according to the present invention. When the air conditioning terminal 4 needs to supply cold and the domestic hot water user terminal 10 needs domestic hot water, the first valve 71 and the fourth valve 74 are opened, the second valve 72 and the third valve 73 are closed, and the first water pump 61 and the second water pump 62 are respectively opened.
At this time, the compressor 1 is started, and the four-way reversing valve 2 is adjusted so that the first heat exchanger 3 becomes a condenser and the second heat exchanger 9 becomes an evaporator; under the action of the second water pump 62, the cold circulation liquid flows through the first water channel 91 of the second heat exchanger, exchanges heat with the refrigerant channel 92 of the second heat exchanger to release heat, flows through the tail end 4 of the air conditioner to absorb heat, returns to the first water channel 91 of the second heat exchanger to release heat continuously, and circulates in this way; meanwhile, under the action of the first water pump 61, the domestic hot water flows through the first heat exchanger water channel 31, exchanges heat with the first heat exchanger refrigerant channel 32 to absorb heat, and then flows to the domestic hot water user terminal 10, and is circulated and reciprocated in this way; when the water storage capacity of the domestic hot water user terminal 10 is insufficient, the third valve 73 is opened, the fourth valve 74 is closed, and the other parts are kept unchanged, and under the action of the first water pump 61, the domestic hot water supply starts from the municipal water supply terminal 8, flows through the first heat exchanger water channel 31, exchanges heat with the first heat exchanger refrigerant channel 32 to absorb heat, and flows to the domestic hot water user terminal 10 to increase the water storage capacity. At this time, if the heat required to be released by the first heat exchanger 3 as a condenser is greater than the heat consumption of the domestic hot water user, the fan 34 on the first heat exchanger 3 is turned on to exchange heat between the air and the first heat exchanger refrigerant channel 32, and release the heat to the outdoor air; otherwise, the blower 34 need not be turned on.
Fig. 8 is a schematic diagram of a domestic hot water, cooling and heating combined supply system with a superheating section. When heat supply and domestic hot water are required at the same time, the temperature of the condenser is often changed when the domestic hot water is produced, and the heat pump efficiency is reduced. To mitigate this effect, by adding the third heat exchanger 11, the second heat exchanger 9 is made to only take over the heat exchange of the superheating section, the heat exchange of the domestic hot water no longer passing through the condenser overall process, but only through the second heat exchanger 9 as the superheating section.
When the air conditioner terminal 4 needs to supply heat and the domestic hot water user terminal 10 needs domestic hot water, the second valve 72 is opened, the first valve 71 is closed, the first water pump 61 and the second water pump 62 are respectively opened, and the fan 34 on the first heat exchanger 3 is operated.
At this time, the compressor 1 is started, the four-way reversing valve 2 is adjusted, the second heat exchanger 9 and the third heat exchanger 11 are made to be condensers, and the first heat exchanger 3 is made to be an evaporator; under the action of the second water pump 62, the heat supply circulating liquid flows through the second heat exchanger first water channel 91 and the third heat exchanger water channel 111, exchanges heat with the second heat exchanger refrigerant channel 92 and the third heat exchanger refrigerant channel 112 respectively to absorb heat, flows through the air conditioner tail end 4 to release heat, returns to the second heat exchanger first water channel 91 and the third heat exchanger water channel 111 to absorb heat continuously, and circulates and reciprocates in this way; at the same time, the first heat exchanger 3 exchanges heat with the first heat exchanger refrigerant channel 32 under the action of the fan 34, so that the first heat exchanger refrigerant channel 32 absorbs heat from the outdoor air; meanwhile, under the action of the first water pump 61, the domestic hot water supply starts from the municipal water supply end 8, flows through the second heat exchanger second water channel 93, exchanges heat with the second heat exchanger refrigerant channel 92 to absorb heat, and then flows to the domestic hot water user end 10.
The above embodiment is specifically described by taking a direct-current domestic hot water mode as an example, and in addition, the direct-current domestic hot water mode can be replaced by a hot water tank circulation heating type domestic hot water mode, and the structural form and the operation mode are similar to those of the above embodiment, and are not described herein.
In summary, in the domestic hot water, cold supply and heat supply combined supply system, the first heat exchanger 3 is a three-medium heat exchanger, the second heat exchanger 9 is a three-channel heat exchanger, so that the system structure is simplified, condensation heat can be recycled during cold supply, the domestic hot water can be prepared, the energy for preparing the domestic hot water is saved, the equipment consumables and the installation space are saved, and the domestic hot water supply in a heat supply mode is realized.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (2)

1. The domestic hot water, cold supply and heat supply combined supply system is characterized by comprising a heat pump unit, a domestic hot water user end, a municipal water supply end and an air conditioner tail end, wherein the heat pump unit comprises a compressor, a first heat exchanger, a throttling device and a second heat exchanger, the compressor, the first heat exchanger, the throttling device and the second heat exchanger are sequentially connected to form a first closed loop, and the air conditioner tail end and the second heat exchanger are connected to form a second closed loop; the outlet of the municipal water supply end is connected with the first end of a first main pipeline, the second end of the first main pipeline is respectively connected with the first ends of a first parallel branch and a second parallel branch, the second ends of the first parallel branch and the second parallel branch are respectively connected with the first end of a second main pipeline, the second end of the second main pipeline is connected with the inlet of the domestic hot water user end, and the first heat exchanger and the second heat exchanger are correspondingly connected on the first parallel branch and the second parallel branch;
the first heat exchanger comprises a first heat exchanger water channel, a first heat exchanger refrigerant channel, an air channel and a fan, and two ends of the first heat exchanger refrigerant channel are respectively connected with the compressor and the throttling device correspondingly; two ends of the first heat exchanger water channel are respectively and correspondingly connected with the second end of the first main pipeline and the first end of the second main pipeline to form the first parallel branch, and the fan is connected with the air channel;
The second heat exchanger comprises a second heat exchanger first water channel, a second heat exchanger refrigerant channel and a second heat exchanger second water channel, and two ends of the second heat exchanger first water channel are respectively connected with the tail end of the air conditioner to form a second closed loop; two ends of the second heat exchanger refrigerant channel are respectively connected with the compressor and the throttling device correspondingly; two ends of a second water channel of the second heat exchanger are respectively correspondingly connected with the second end of the first main pipeline and the first end of the second main pipeline to form the second parallel branch;
The air conditioner further comprises a third heat exchanger, wherein the third heat exchanger comprises a third heat exchanger water channel and a third heat exchanger refrigerant channel, the third heat exchanger refrigerant channel is connected to a connecting pipeline between the throttling device and the second heat exchanger refrigerant channel, and the third heat exchanger water channel is connected to a connecting pipeline between the second heat exchanger first water channel and the tail end of the air conditioner;
a first water pump is arranged on the first main pipeline or the second main pipeline; a second water pump is arranged on the second closed loop; a first valve is arranged on the first parallel branch; a second valve is arranged on the second parallel branch;
The system also comprises a life hot water circulation branch, wherein the first end of the life hot water circulation branch is connected with an outlet of the life hot water user side, and the second end of the life hot water circulation branch is connected with the first main pipeline;
A third valve is arranged on the first main pipeline and is arranged on the first main pipeline between the outlet of the municipal water supply end and the second end of the domestic hot water circulation branch; a fourth valve is arranged on the domestic hot water circulation branch;
When the first water pump is arranged on the first main pipeline, the first water pump is arranged on the first main pipeline between the first end of the first parallel branch and the second end of the domestic hot water circulation branch;
The heat pump unit comprises a four-way reversing valve, and the compressor is connected with the first heat exchanger and the second heat exchanger through the four-way reversing valve.
2. The domestic hot water, cold supply and heat supply combined supply system according to claim 1, wherein an auxiliary heat source is further arranged at the inlet of the domestic hot water user side.
CN202011449799.4A 2020-12-09 2020-12-09 Domestic hot water, cold supply and heat supply combined supply system Active CN112484339B (en)

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CN114517959B (en) * 2022-02-28 2024-02-20 青岛海尔空调电子有限公司 Control method of air conditioning system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105509363A (en) * 2016-01-31 2016-04-20 嘉兴学院 High-efficiency clean multi-energy comprehensive utilization cold-heat combined supply system
WO2020143169A1 (en) * 2019-01-07 2020-07-16 珠海格力电器股份有限公司 Air conditioning system and control method therefor
CN214250197U (en) * 2020-12-09 2021-09-21 清华大学 Domestic hot water, cold supply and heat supply combined supply system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105509363A (en) * 2016-01-31 2016-04-20 嘉兴学院 High-efficiency clean multi-energy comprehensive utilization cold-heat combined supply system
WO2020143169A1 (en) * 2019-01-07 2020-07-16 珠海格力电器股份有限公司 Air conditioning system and control method therefor
CN214250197U (en) * 2020-12-09 2021-09-21 清华大学 Domestic hot water, cold supply and heat supply combined supply system

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