CN114413362B - Coupling system of air conditioner and heat pump water heater and control method thereof - Google Patents
Coupling system of air conditioner and heat pump water heater and control method thereof Download PDFInfo
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- CN114413362B CN114413362B CN202210070880.4A CN202210070880A CN114413362B CN 114413362 B CN114413362 B CN 114413362B CN 202210070880 A CN202210070880 A CN 202210070880A CN 114413362 B CN114413362 B CN 114413362B
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- 238000010257 thawing Methods 0.000 claims abstract description 64
- 239000003507 refrigerant Substances 0.000 claims abstract description 58
- 238000004378 air conditioning Methods 0.000 claims abstract description 56
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/136—Defrosting or de-icing; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/335—Control of pumps, e.g. on-off control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
- F24H15/429—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Computer Hardware Design (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a coupling system of an air conditioner and a heat pump water heater and a control method thereof, wherein the coupling system comprises an air conditioner unit, a heat pump water heater and a heat exchange module, the air conditioner unit is provided with a heat exchange pipeline, the heat exchange pipeline is provided with a heat exchange device, the heat pump water heater comprises a water tank, and the heat exchange module is respectively connected with the heat exchange device and the water tank, so that water in the water tank can exchange heat with an air conditioner refrigerant through the heat exchange device and circulate back into the water tank; the invention aims at the mutually independent air conditioning unit and heat pump water heater, and on the basis that the air conditioning unit and the heat pump water heater can respectively and independently operate, the energy of water in the water heater and the energy of refrigerant in the air conditioner can be mutually exchanged according to the needs only by arranging the heat exchange pipeline and the heat exchange module, so that the invention has simple structure, effectively couples the mutually independent air conditioning unit and the mutually independent heat pump water heater for use, is beneficial to improving the energy utilization efficiency, and can realize high-energy-efficiency and high-efficiency defrosting.
Description
Technical Field
The invention relates to the technical field of heat pump systems, in particular to a coupling system of an air conditioner and a heat pump water heater and a control method thereof.
Background
An air conditioner is an indispensable electrical device in daily life of people, and has various structural forms. With the continuous improvement of the industrial design level and the application of new technology, new materials and new models to air conditioners, various air conditioners are developed. However, the fin-tube heat exchanger of the air conditioning unit external machine in the market at present is easy to frost in a low-temperature and high-humidity environment, the heat transfer performance of the frosted fin-tube evaporator is weakened, the air flow resistance is increased, the fan performance is weakened, the input current is increased, and the system heating quantity and the system heating Coefficient (COP) are further reduced. In order to maintain stable operation of the air conditioning unit, it is necessary to periodically defrost the outdoor unit of the air source heat pump.
Defrosting can be achieved in a number of ways, including shutdown defrosting, electrical heating defrosting, hot gas bypass defrosting, reverse cycle defrosting, and the like. The reverse circulation defrosting and the electric heating defrosting are commonly used defrosting modes at present, but have the following problems:
(1) Reverse defrost energy is primarily from the energy stored in the indoor metal coil and work input to the compressor, and is insufficient for quick, clean defrost. Insufficient defrosting capacity can prolong defrosting time, so that the total efficiency of the system is reduced, even defrosting is not clean, frequent defrosting is caused, and unit faults are caused after vicious circle.
(2) The electric heating defrosting is low in efficiency, one part of work is converted into one part of heat, but the system cannot fully absorb the heat, so that the electric heating energy efficiency ratio is smaller than 1.
Meanwhile, in daily life of people, two requirements of domestic hot water and air conditioning occupy a larger proportion in energy consumption, and conventional air conditioning and heat pump water heaters are often installed and used at the same time; the air conditioner and the heat pump water heater are used as heat pump equipment in the design level of the whole system scheme, and the air conditioner and the heat pump water heater are often operated independently of each other and lack of effective coupling, so that the energy utilization is not efficient enough, and larger energy waste is caused. Although the scheme of combining the air conditioner with the heat pump water heater exists in the prior art, the combined system structure is complex, the regulation and control precision in the operation process is poor, and the working conditions such as defrosting of the heat pump equipment are difficult to regulate and control accurately, efficiently and timely.
Disclosure of Invention
In view of the above, the present invention is directed to a coupling system for an air conditioner and a heat pump water heater and a control method thereof, so as to solve the problems of lack of effective coupling, low energy utilization efficiency and defrosting of the heat pump device in the prior art.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the utility model provides a coupling system of air conditioner and heat pump water heater, includes air conditioning unit, heat pump water heater, heat transfer module, air conditioning unit sets up the heat transfer pipeline, the heat transfer pipeline sets up heat transfer device, the heat pump water heater includes the water tank, the heat transfer module is connected with heat transfer device, water tank respectively for the hydroenergy in the water tank flows through heat transfer device and air conditioning refrigerant heat transfer, and circulates back in the water tank. Therefore, in the application, the air conditioning unit and the heat pump water heater are mutually independent heat pump equipment, and on the basis of being capable of running independently, the energy of water in the water heater and the energy of a refrigerant in the air conditioner can be mutually exchanged as required only by arranging the heat exchange pipeline and the heat exchange module, so that the air conditioning water heater is simple in structure, convenient to house decoration or household transformation, and capable of effectively reducing the difficulty and cost of the combined transformation of household appliances of users; the independent air conditioning units and the heat pump water heater are effectively coupled for use, so that the energy utilization efficiency is improved; meanwhile, when any one of the equipment is defrosted, the other equipment can provide effective heat supply, so that high-energy-efficiency and high-efficiency defrosting can be realized between the two heat pump equipment.
Further, the heat exchange module comprises a circulating pipeline which is respectively connected with the heat exchange device and the water tank, a circulating loop is formed between the heat exchange device and the water tank, and a circulating water pump is arranged in the circulating pipeline, so that water in the water tank can exchange heat with an air-conditioning refrigerant through the heat exchange device and circulate back into the water tank.
Further, the air conditioning unit comprises a first refrigerant pipeline and a heat exchange pipeline, wherein a first electromagnetic valve, a second electromagnetic valve and an electronic expansion valve A are sequentially arranged in the first refrigerant pipeline, the heat exchange pipeline is connected with the first electromagnetic valve and the second electromagnetic valve in the first refrigerant pipeline in parallel, and a third electromagnetic valve, a first expansion valve, a heat exchange device and a fourth electromagnetic valve are sequentially arranged in the heat exchange pipeline. A bridge circuit is arranged between the heat exchange pipeline and the first refrigerant pipeline, and a fifth electromagnetic valve is arranged in the bridge circuit; one end of the bridge circuit is connected with the first refrigerant pipeline, the connecting point is positioned between the first electromagnetic valve and the second electromagnetic valve, the other end of the bridge circuit is connected with the heat exchange pipeline, and the connecting point is positioned between the first expansion valve and the heat exchange device. Therefore, by arranging the heat exchange pipeline, the bridge circuit and the corresponding electromagnetic valve structure, the air conditioning unit can regulate and control the condition of the refrigerant flowing through the heat exchange device according to actual needs on the basis of independent operation, thereby being convenient for timely and effectively regulating and controlling the heat exchange condition between the heat exchange device and water in the water tank.
The air conditioning unit comprises a refrigerant branch, wherein the refrigerant branch is connected with an electronic expansion valve A of a first refrigerant pipeline in parallel, and a sixth electromagnetic valve is arranged in the refrigerant branch. Therefore, through the arrangement of the bridge circuit and the refrigerant branch circuit, the first expansion valve or the electronic expansion valve A can be stopped according to actual needs, and interference between two expansion valves of the air conditioning unit on the same pressure side is avoided.
A control method of a coupling system of an air conditioner and a heat pump water heater is applied to the coupling system of the air conditioner and the heat pump water heater; the control method comprises a collaborative defrosting mode and a collaborative heating water mode, wherein the collaborative defrosting mode comprises an air conditioner defrosting mode and a water heater defrosting mode, which is beneficial to improving the energy utilization efficiency; meanwhile, when any one of the equipment is defrosted, the other equipment can provide effective heat supply, so that high-energy-efficiency and high-efficiency defrosting can be realized between the two heat pump equipment.
Further, the air conditioner defrosting mode includes: the coupling system controls the air conditioning unit to enter a defrosting working condition, closes the first electromagnetic valve, the fifth electromagnetic valve, the second electromagnetic valve and the electronic expansion valve A, and opens the third electromagnetic valve, the first expansion valve, the fourth electromagnetic valve and the sixth electromagnetic valve; the coupling system starts the circulating water pump and keeps the heat pump water heater running normally. Therefore, in the defrosting mode of the air conditioner, the heat exchange device is used as an evaporation side, and heat exchange is carried out between the heat exchange device and the high-temperature water in the water tank through the circulating pipeline, so that the normal operation of the heat pump water heater is kept, the air conditioner unit has a stable heat source, the flow and the temperature of a refrigerant can be improved, and the defrosting efficiency is improved.
Further, the defrosting mode of the water heater includes:
s1, a coupling system controls a heat pump water heater to enter a defrosting working condition, and the operating frequency of an air conditioner in a heating mode is detected;
s2, the coupling system judges whether the operating frequency of the air conditioner is the maximum operating frequency; if not, carrying out step S3;
s3, detecting the water temperature T1 in the water tank and the outdoor environment temperature T2 by the coupling system;
s4, the coupling system judges whether T1 is smaller than a first preset temperature and/or whether T1-T2 is smaller than a second preset temperature; if so, the first electromagnetic valve, the fifth electromagnetic valve, the second electromagnetic valve and the electronic expansion valve A are closed, the third electromagnetic valve, the first expansion valve, the fourth electromagnetic valve and the sixth electromagnetic valve are opened, and the circulating water pump is started. Therefore, in the defrosting mode of the water heater, part of heat of the refrigerant in the air conditioning unit can be utilized to heat water in the water tank, heat supply is provided for the defrosting process of the water heater, and the flow and the temperature of the refrigerant in the heat pump water heater can be improved, so that the defrosting efficiency of the heat pump water heater is improved. Meanwhile, through detection, analysis and processing of parameters such as an air conditioner running state, water temperature of a water tank, environmental temperature and the like, on one hand, the control precision of the coupling system in a collaborative defrosting mode is improved, the defrosting process can be controlled accurately, efficiently and timely, and on the other hand, the intelligent and automatic degree of the operation of the coupling system is improved.
Further, the cooperative hot water making mode includes:
b1, controlling an operation refrigeration mode of an air conditioning unit by a coupling system, and detecting the water temperature T1 in a water tank;
b2, the coupling system judges whether T1 is smaller than a third preset temperature and/or whether T1-T2 is smaller than a fourth preset temperature; if yes, carrying out the step B3; if not, carrying out the step B4;
b3, the coupling system closes the third electromagnetic valve, the first expansion valve, the second electromagnetic valve and the sixth electromagnetic valve, opens the first electromagnetic valve, the fifth electromagnetic valve, the fourth electromagnetic valve and the electronic expansion valve A, starts the circulating water pump and closes the outdoor fan A;
and B4, controlling the air conditioning unit to maintain a normal refrigeration mode by the coupling system. Therefore, under the cooperative hot water making mode, the water in the water tank can be heated in an auxiliary mode by utilizing the waste heat generated during air conditioning refrigeration, so that on one hand, the waste heat recovery during air conditioning refrigeration can be realized, and on the other hand, the heating efficiency of hot water can be improved, and the power consumption of the heat pump water heater can be reduced.
Further, the control method includes a water tank self-heat exchange mode, the water tank self-heat exchange mode including: the coupling system detects the temperature T1 of the water tank in real time and judges whether the temperature T1 is more than a fifth preset temperature or not; if yes, the circulating water pump is started. Therefore, when the water temperature in the water tank is too high, no matter what running state the air conditioner is in, the circulating water pump is directly started, the water temperature in the water tank is prevented from layering, the condensation temperature is prevented from being too high, the system energy efficiency is reduced, the improvement of the system energy efficiency of the heat pump water heater is facilitated, and meanwhile, the self heat exchange effect in the water tank can be enhanced.
Compared with the prior art, the coupling system of the air conditioner and the heat pump water heater and the control method thereof have the following advantages:
according to the coupling system of the air conditioner and the heat pump water heater and the control method thereof, on the basis that the air conditioner unit and the heat pump water heater which are independent to each other can operate independently, the energy of water in the water heater and the energy of refrigerant in the air conditioner can be exchanged with each other as required only by arranging the heat exchange pipeline and the heat exchange module, so that the coupling system is simple in structure, convenient for home decoration or home improvement, and capable of effectively reducing the difficulty and cost of the combined use improvement of household appliances of users; the independent air conditioning units and the heat pump water heater are effectively coupled for use, so that the energy utilization efficiency is improved; meanwhile, when any one of the equipment is defrosted, the other equipment can provide effective heat supply, so that high-energy-efficiency and high-efficiency defrosting can be realized between the two heat pump equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of a system operation of a coupling system of an air conditioner and a heat pump water heater in an air conditioner defrosting state according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a coupling system of an air conditioner and a heat pump water heater according to an embodiment of the present invention in a defrosting state of the water heater;
FIG. 3 is a schematic diagram illustrating a system operation of a coupling system of an air conditioner and a heat pump water heater in a state of refrigerating the air conditioner and heating the water by the water heater according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a system operation of a coupling system of an air conditioner and a heat pump water heater in a water heating state of the water heater according to an embodiment of the present invention.
Reference numerals illustrate:
1. a first refrigerant line; 11. a first electromagnetic valve; 12. a second electromagnetic valve; 2. a heat exchange pipeline; 21. a third electromagnetic valve; 22. a first expansion valve; 23. a heat exchange device; 24. a fourth electromagnetic valve; 3. a bridge circuit; 31. a fifth electromagnetic valve; 4. a refrigerant branch; 41. a sixth electromagnetic valve; 5. and a second refrigerant pipeline.
Detailed Description
The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. In this application, because the air conditioner and the heat pump water heater both belong to the heat pump equipment, parts with the same name exist in the heat pump water heater, for convenience of description, letter suffixes are added after the names of the parts with the same name to show differences, in the air conditioner unit, A is used as a suffix, and in the heat pump water heater, B is used as a suffix.
Meanwhile, in the drawings of the present application, arrows indicate the flow direction of the relevant medium (refrigerant, water, etc.) in the pipeline, and broken lines indicate that the relevant pipeline is in a closed state.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
In the prior art, people often install and use conventional air conditioners and heat pump water heaters at the same time; both belong to heat pump type equipment and face the problem of defrosting; meanwhile, the two devices in the prior art often run independently of each other, and lack of effective coupling, so that energy utilization is not efficient enough, and larger energy waste is caused.
In order to solve the problem that heat pump type equipment in the prior art lacks effective coupling, energy utilization efficiency is lower and defrosting thereof, this embodiment provides a coupling system of air conditioner and heat pump water heater, as shown in fig. 1-4, the coupling system includes air conditioning unit, heat pump water heater, heat exchange module, air conditioning unit sets up heat exchange pipeline 2, heat exchange pipeline 2 sets up heat transfer device 23, the heat pump water heater includes the water tank, heat exchange module is connected with heat transfer device 23, water tank respectively for the hydroenergy in the water tank flows through heat transfer device 23 and air conditioning refrigerant heat transfer, and circulates back in the water tank.
Therefore, in the application, the air conditioning unit and the heat pump water heater are mutually independent heat pump equipment, and on the basis of being capable of running independently, the energy of water in the water heater and the energy of refrigerant in the air conditioner can be mutually exchanged according to the need only by arranging the heat exchange pipeline 2 and the heat exchange module, so that the air conditioning unit and the heat pump water heater are simple in structure, convenient to house or home improvement, and effectively used in a coupling way, and the energy utilization efficiency is improved; meanwhile, when any one of the equipment is defrosted, the other equipment can provide effective heat supply, so that high-energy-efficiency and high-efficiency defrosting can be realized between the two heat pump equipment.
Meanwhile, for the conventional air conditioner and heat pump water heater which are installed and used in families, the pipeline can be directly transformed on the original equipment, the whole equipment is not required to be replaced, and the difficulty and cost of the joint transformation of household appliances of the user can be effectively reduced.
In this application, to air conditioning unit, including indoor heat exchanger, outdoor heat exchanger A, indoor heat exchanger's one end is connected with outdoor heat exchanger A's one end through second refrigerant pipeline 5, and set up cross valve A in the second refrigerant pipeline 5, compressor A, high pressure sensor etc. indoor heat exchanger's the other end is connected with outdoor heat exchanger A's the other end through first refrigerant pipeline 1, and set up electronic expansion valve A in the first refrigerant pipeline 1 at least, this is the same with conventional air conditioner structure, and it is not repeated here.
Unlike conventional air conditioner, in this application, the first solenoid valve 11, the second solenoid valve 12 and the electronic expansion valve a are sequentially disposed in the first refrigerant pipeline 1, the air conditioning unit is additionally provided with a heat exchange pipeline 2, and the heat exchange pipeline 2 is disposed in parallel with the first refrigerant pipeline 1, specifically, the heat exchange pipeline 2 is parallel with the first solenoid valve 11 and the second solenoid valve 12. The third electromagnetic valve 21, the first expansion valve 22, the heat exchange device 23 and the fourth electromagnetic valve 24 are sequentially arranged in the heat exchange pipeline 2. A bridge 3 is arranged between the heat exchange pipeline 2 and the first refrigerant pipeline 1, specifically, one end of the bridge 3 is connected with the first refrigerant pipeline 1, the connection point is positioned between the first electromagnetic valve 11 and the second electromagnetic valve 12, the other end of the bridge 3 is connected with the heat exchange pipeline 2, and the connection point is positioned between the first expansion valve 22 and the heat exchange device 23; a fifth solenoid valve 31 is arranged in the bridge 3. Therefore, by arranging the heat exchange pipeline 2, the bridge 3 and the corresponding electromagnetic valve structure, the air conditioning unit can regulate and control the condition of the refrigerant flowing through the heat exchange device 23 according to actual needs on the basis of independent operation, thereby being convenient for timely and effectively regulating and controlling the heat exchange condition between the heat exchange device 23 and water in the water tank.
The heat exchange device 23 is preferably a plate heat exchanger, so that the refrigerant medium in the air conditioner and the water medium in the water tank can exchange heat fully; the first expansion valve 22 is preferably a conventional electronic expansion valve.
In addition, in consideration of possible interference between the electronic expansion valve a and the first expansion valve 22 arranged in the air conditioning unit, the present application further provides a refrigerant branch 4, wherein the refrigerant branch 4 is arranged in parallel with the electronic expansion valve a of the first refrigerant pipeline 1, and a sixth electromagnetic valve 41 is arranged in the refrigerant branch 4; therefore, through the arrangement of the bridge 3 and the refrigerant branch 4, the first expansion valve 22 or the electronic expansion valve A can be stopped according to actual needs, and interference between two expansion valves of the air conditioning unit on the same pressure side is avoided.
For the heat pump water heater, the heat pump water heater comprises a refrigerant pipeline, a water tank, an electronic expansion valve B, an outdoor heat exchanger B, a compressor B, a four-way valve B and the like, wherein the water tank is provided with a water inlet pipe and a water outlet pipe which are respectively used for adding water and supplying hot water, and a water tank heat exchanger communicated with the refrigerant pipeline is arranged in the water tank and is used for transferring heat to the water; the water tank is also provided with a temperature sensing probe for monitoring the water temperature in real time; this is the same as the conventional heat pump water heater structure and will not be described here in detail.
For the heat exchange module, the heat exchange module comprises a circulating pipeline which is respectively connected with the heat exchange device 23 and the water tank, and a circulating loop is formed between the heat exchange device 23 and the water tank, wherein a circulating water pump is arranged in the circulating pipeline and is used for providing power for circulating flow and heat exchange of an aqueous medium, so that water in the water tank can flow through the heat exchange device 23 to exchange heat with an air-conditioning refrigerant and circulate back into the water tank.
The coupling system also comprises a central processor, an outer ring temperature detection device, a data storage device and the like, wherein the central processor can be connected with various electric control components, such as an electric control valve, a four-way valve, a fan, a detector and the like, so that the coupling system can regulate and control the normal operation of an air conditioning unit and a heat pump water heater, and the acquisition, analysis and the processing of related operation data and the like through the central processor; the outer ring temperature detection device is used for detecting the outdoor environment temperature in real time, and the data storage device is used for storing the related data of the coupling system operation.
On the basis of the coupling system, the application also provides a control method of the coupling system, wherein the control method comprises a cooperative defrosting mode and a cooperative hot water heating mode. The cooperative defrosting mode comprises an air conditioner defrosting mode and a water heater defrosting mode.
As shown in the system operation state of fig. 1, the air conditioner defrosting mode includes: the coupling system controls the air conditioning unit to enter a defrosting working condition, closes the first electromagnetic valve 11, the fifth electromagnetic valve 31, the second electromagnetic valve 12 and the electronic expansion valve A, and opens the third electromagnetic valve 21, the first expansion valve 22, the fourth electromagnetic valve 24 and the sixth electromagnetic valve 41; the coupling system starts the circulating water pump and keeps the heat pump water heater running normally.
Therefore, in the defrosting mode of the air conditioner, the heat exchange device 23 serves as an evaporation side, and exchanges heat with high temperature water in the water tank through the circulating pipeline, so that the heat pump water heater keeps operating normally, the air conditioner unit has a stable heat source, the flow rate and the temperature of a refrigerant can be improved, the defrosting efficiency is improved, and the COP is 2-3 under the environment temperature (easy to frost working condition) of-7 ℃ to 7 ℃, so that the defrosting is more efficient than electric heating defrosting.
As shown in the system operation state of fig. 2, the defrosting mode of the water heater includes:
s1, a coupling system controls a heat pump water heater to enter a defrosting working condition, and the operating frequency of an air conditioner in a heating mode is detected;
s2, the coupling system judges whether the operating frequency of the air conditioner is the maximum operating frequency; if not, carrying out step S3;
when defrosting is needed by the heat pump equipment, the heat pump equipment is usually in winter, in a defrosting mode of the water heater, whether the heating mode of the air conditioner is in a maximum operating frequency state or not is firstly judged, if the heating mode of the air conditioner is not in the maximum operating frequency state, the compressor is in the frequency-reducing operation, the indoor load is small, and the defrosting implementation condition of the air conditioner and the water heater is achieved.
S3, detecting the water temperature T1 in the water tank and the outdoor environment temperature T2 by the coupling system;
s4, the coupling system judges whether T1 is smaller than a first preset temperature and/or whether T1-T2 is smaller than a second preset temperature; if so, the first solenoid valve 11, the fifth solenoid valve 31, the second solenoid valve 12, and the electronic expansion valve a are closed, and the third solenoid valve 21, the first expansion valve 22, the fourth solenoid valve 24, and the sixth solenoid valve 41 are opened, thereby starting the circulation water pump.
The setting of the judgment condition that T1 is smaller than the first preset temperature can effectively prevent the situation that the performance of the air conditioning unit is reduced due to the fact that the water temperature is higher and the condensation temperature is higher on the basis of ensuring that a user normally uses an air conditioner to heat in a defrosting mode of the water heater, so that the influence on the use feeling of the user on air conditioning heat is avoided; and the judgment condition that T1-T2 is smaller than the second preset temperature is set, so that the temperature of the hot water in the water tank is high enough, namely, the frequency of air conditioner assisted defrosting can be reduced to the greatest extent under the condition that the heat pump water heater is enough to defrost, and the normal use of air conditioner heating by a user is ensured. The first preset temperature and the second preset temperature are data preset in an air conditioner data storage device by an equipment manufacturer, the first preset temperature in the application is 38-45 ℃, and the second preset temperature is 3-7 ℃; preferably, the first preset temperature is 41 ℃ and the second preset temperature is 5 ℃.
Therefore, in the defrosting mode of the water heater, part of heat of the refrigerant in the air conditioning unit can be utilized to heat water in the water tank, heat supply is provided for the defrosting process of the water heater, and the flow and the temperature of the refrigerant in the heat pump water heater can be improved, so that the defrosting efficiency of the heat pump water heater is improved. Meanwhile, through detection, analysis and processing of parameters such as an air conditioner running state, water temperature of a water tank, environmental temperature and the like, on one hand, the control precision of the coupling system in a collaborative defrosting mode is improved, the defrosting process can be controlled accurately, efficiently and timely, and on the other hand, the intelligent and automatic degree of the operation of the coupling system is improved.
As shown in the system operation state of fig. 3, the co-heating water mode includes:
b1, controlling an operation refrigeration mode of an air conditioning unit by a coupling system, and detecting the water temperature T1 in a water tank;
b2, the coupling system judges whether T1 is smaller than a third preset temperature and/or whether T1-T2 is smaller than a fourth preset temperature; if yes, carrying out the step B3; if not, carrying out the step B4;
the setting of the judgment condition that T1 is smaller than the third preset temperature can effectively prevent the situation that the performance of the air conditioning unit is reduced due to the fact that the water temperature is higher on the basis of ensuring that a user normally uses the air conditioning unit for refrigeration in a collaborative hot water making mode, and avoid affecting the use feeling of the user on the air conditioning unit for refrigeration; and the judgment condition that T1-T2 is smaller than the fourth preset temperature is set, so that the temperature of hot water in the water tank is high enough, the frequency of auxiliary heating of the air conditioner can be reduced to the greatest extent, and the normal use of air conditioner refrigeration by a user is ensured. The third preset temperature and the fourth preset temperature are data preset in the air-conditioning data storage device by equipment manufacturers, the third preset temperature is 38-45 ℃, and the fourth preset temperature is 3-7 ℃; preferably, the third preset temperature is 41 ℃, and the fourth preset temperature is 5 ℃.
B3, the coupling system closes the third electromagnetic valve 21, the first expansion valve 22, the second electromagnetic valve 12 and the sixth electromagnetic valve 41, opens the first electromagnetic valve 11, the fifth electromagnetic valve 31, the fourth electromagnetic valve 24 and the electronic expansion valve A, starts the circulating water pump and closes the outdoor fan A;
wherein, the step B3 is a process of starting an air conditioner to cooperatively produce hot water; the high-temperature refrigerant in the air conditioner is utilized to enter the heat exchange device 23, and the heat exchange module is utilized to carry out auxiliary heating on water in the water tank, so that on one hand, waste heat recovery during refrigeration of the air conditioner can be realized, on the other hand, the heating efficiency of hot water can be improved, and the power consumption of the heat pump water heater can be reduced.
B4, the coupling system closes the third electromagnetic valve 21, the first expansion valve 22, the fourth electromagnetic valve 24, the fifth electromagnetic valve 31 and the sixth electromagnetic valve 41, opens the first electromagnetic valve 11, the second electromagnetic valve 12 and the electronic expansion valve a, and controls the air conditioning unit to maintain a normal refrigeration mode.
The step B4 is that the air conditioner maintains a conventional refrigeration mode, and the heat pump water heater is in a normal operation state, and the heat generated during refrigeration of the air conditioner is still cooled by the outdoor fan; namely, the operation is basically the same as the independent operation of the air conditioner and the independent operation of the water heater, and the circulating water pump does not need to operate.
Therefore, under the cooperative hot water making mode, the water in the water tank can be heated in an auxiliary mode by utilizing the waste heat generated during air conditioning refrigeration, so that on one hand, the waste heat recovery during air conditioning refrigeration can be realized, and on the other hand, the heating efficiency of hot water can be improved, and the power consumption of the heat pump water heater can be reduced.
In addition, as shown in the system running state of fig. 1, the control method further includes a water tank self-heat exchange mode, specifically:
the coupling system detects the temperature T1 of the water tank in real time and judges whether the temperature T1 is more than a fifth preset temperature or not; if yes, the circulating water pump is started no matter what running state the air conditioner is in.
When the water temperature in the water tank is too high, the circulating water pump is directly started, the water temperature in the water tank is prevented from layering (namely, the upper part of the water tank is far higher than the lower part of the water tank), the condition that the condensation temperature is higher and the energy efficiency of the system is reduced is avoided, the energy efficiency of the system of the heat pump water heater is improved, and meanwhile, the self heat exchange effect in the water tank can be enhanced. The fifth preset temperature is preset by equipment manufacturers in the air conditioner data storage device, and is preferably 40-45 ℃, and is preferably 41 ℃.
In the present invention, the air conditioning unit and the heat pump water heater include other conventional structures, such as a housing assembly, besides those related to the present application, and in view of the prior art, a detailed description thereof will be omitted.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The coupling system of the air conditioner and the heat pump water heater is characterized by comprising an air conditioning unit, a heat pump water heater and a heat exchange module, wherein the air conditioning unit is provided with a heat exchange pipeline (2), the heat exchange pipeline (2) is provided with a heat exchange device (23), the heat pump water heater comprises a water tank, and the heat exchange module is respectively connected with the heat exchange device (23) and the water tank, so that water in the water tank can exchange heat with an air conditioning refrigerant through the heat exchange device (23) and circulate back into the water tank;
the air conditioning unit comprises a first refrigerant pipeline (1) and a heat exchange pipeline (2), wherein a first electromagnetic valve (11), a second electromagnetic valve (12) and an electronic expansion valve A are sequentially arranged in the first refrigerant pipeline (1), the heat exchange pipeline (2) is connected with the first electromagnetic valve (11) and the second electromagnetic valve (12) in the first refrigerant pipeline (1) in parallel, and a third electromagnetic valve (21), a first expansion valve (22), a heat exchange device (23) and a fourth electromagnetic valve (24) are sequentially arranged in the heat exchange pipeline (2); a bridge circuit (3) is arranged between the heat exchange pipeline (2) and the first refrigerant pipeline (1), and a fifth electromagnetic valve (31) is arranged in the bridge circuit (3); one end of the bridge circuit (3) is connected with the first refrigerant pipeline (1), and the connecting point is positioned between the first electromagnetic valve (11) and the second electromagnetic valve (12); the other end of the bridge circuit (3) is connected with the heat exchange pipeline (2), and the connection point is positioned between the first expansion valve (22) and the heat exchange device (23); the air conditioning unit comprises a refrigerant branch (4), wherein the refrigerant branch (4) is connected with an electronic expansion valve A of a first refrigerant pipeline (1) in parallel, and a sixth electromagnetic valve (41) is arranged in the refrigerant branch (4).
2. The coupling system of an air conditioner and a heat pump water heater according to claim 1, wherein the heat exchange module comprises a circulation pipeline, the circulation pipeline is respectively connected with the heat exchange device (23) and the water tank, a circulation loop is formed between the heat exchange device (23) and the water tank, and a circulating water pump is arranged in the circulation pipeline.
3. A control method of a coupling system of an air conditioner and a heat pump water heater, characterized in that the control method is applied to the coupling system of the air conditioner and the heat pump water heater of claim 2; the control method is an air conditioner defrosting mode.
4. A control method of a coupling system of an air conditioner and a heat pump water heater according to claim 3, wherein the air conditioner defrosting mode comprises: the coupling system controls the air conditioning unit to enter a defrosting working condition, closes the first electromagnetic valve (11), the fifth electromagnetic valve (31), the second electromagnetic valve (12) and the electronic expansion valve A, and opens the third electromagnetic valve (21), the first expansion valve (22), the fourth electromagnetic valve (24) and the sixth electromagnetic valve (41); the coupling system starts the circulating water pump and keeps the heat pump water heater running normally.
5. A control method of a coupling system of an air conditioner and a heat pump water heater according to claim 3, wherein the control method includes a tank self heat exchange mode including: the coupling system detects the temperature T1 of the water tank in real time and judges whether the temperature T1 is more than a fifth preset temperature or not; if yes, the circulating water pump is started.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310290012.1A CN116499043A (en) | 2022-01-21 | 2022-01-21 | Control method of coupling system of air conditioner and heat pump water heater |
| CN202210070880.4A CN114413362B (en) | 2022-01-21 | 2022-01-21 | Coupling system of air conditioner and heat pump water heater and control method thereof |
| CN202310290581.6A CN116428655A (en) | 2022-01-21 | 2022-01-21 | Control method of coupling system of air conditioner and heat pump water heater |
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| CN202310290581.6A Division CN116428655A (en) | 2022-01-21 | 2022-01-21 | Control method of coupling system of air conditioner and heat pump water heater |
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| CN115420029A (en) * | 2022-07-21 | 2022-12-02 | 日出东方控股股份有限公司 | Novel efficient multi-mode cascade heat pump system and operation method thereof |
| CN115751713B (en) * | 2022-10-19 | 2024-08-23 | 珠海格力电器股份有限公司 | Fluid circulation device, fluid circulation system and control method |
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Also Published As
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| CN114413362A (en) | 2022-04-29 |
| CN116428655A (en) | 2023-07-14 |
| CN116499043A (en) | 2023-07-28 |
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Effective date of registration: 20220922 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Applicant after: NINGBO AUX ELECTRIC Co.,Ltd. Applicant after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Applicant before: NINGBO AUX ELECTRIC Co.,Ltd. Applicant before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |
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