CN112161350B - Air conditioning unit with adjustable heat exchange rate and control method thereof - Google Patents
Air conditioning unit with adjustable heat exchange rate and control method thereof Download PDFInfo
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- CN112161350B CN112161350B CN202010976506.1A CN202010976506A CN112161350B CN 112161350 B CN112161350 B CN 112161350B CN 202010976506 A CN202010976506 A CN 202010976506A CN 112161350 B CN112161350 B CN 112161350B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 213
- 239000003507 refrigerant Substances 0.000 claims abstract description 70
- 238000010438 heat treatment Methods 0.000 claims description 39
- 238000005057 refrigeration Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 18
- 239000000498 cooling water Substances 0.000 description 6
- 239000008236 heating water Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- 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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning unit with adjustable heat exchange rate and a control method thereof, wherein the air conditioning unit comprises: the compressor, the four-way valve, the condenser and the evaporator are connected in sequence; a water tank; the refrigerant heat exchange coil and the waterway heat exchange coil are positioned in the water tank and used for exchanging heat with water in the water tank to prepare hot water or cold water; the inlet of the refrigerant heat exchange coil is connected with the refrigerant inlet of the condenser, and the outlet of the refrigerant heat exchange coil is connected with the refrigerant outlet of the condenser; the inlet of the water channel heat exchange coil is connected with the water outlet of the air conditioning unit, and the outlet of the water channel heat exchange coil is connected with the water inlet of the air conditioning unit. The invention solves the problem of poor user comfort caused by too high or too low speed of hot water or cold water production in the prior art, meets various hot water or cold water production requirements of users, and improves the comprehensive utilization rate of the whole machine and the user comfort.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning unit with adjustable heat exchange rate and a control method thereof.
Background
At present, a fluorine path heat exchange hot water making or refrigerating scheme is adopted on the market, and a condensation pipe is usually directly introduced into a water tank for heat exchange. The refrigerant has the problems of overhigh exhaust pressure and exhaust temperature, and the refrigerant with overhigh temperature and pressure can cause the water temperature of the water tank to be quickly heated, so that a user can be scalded by water.
Meanwhile, a scheme that a hot water pipe and a water tank exchange heat to produce hot water or refrigerate exists in the prior art, the scheme brings comfort and simultaneously has the problem of too slow effect, and some emergency requirements of users cannot be met.
Aiming at the problem that the comfort of users is poor due to too fast or too slow hot or cold water making speed in the related art, no effective solution is provided at present.
Disclosure of Invention
The invention provides an air conditioning unit with adjustable heat exchange rate and a control method thereof, which at least solve the problem of poor user comfort caused by too fast or too slow hot water or cold water making rate in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioning unit including: the compressor, the four-way valve, the condenser and the evaporator are connected in sequence; a water tank; the refrigerant heat exchange coil and the waterway heat exchange coil are positioned in the water tank and used for exchanging heat with water in the water tank to prepare hot water or cold water; the inlet of the refrigerant heat exchange coil is connected with the refrigerant inlet of the condenser, and the outlet of the refrigerant heat exchange coil is connected with the refrigerant outlet of the condenser; the inlet of the water channel heat exchange coil is connected with the water outlet of the air conditioning unit, and the outlet of the water channel heat exchange coil is connected with the water inlet of the air conditioning unit.
Further, still include: and the terminal equipment is connected with the refrigerant heat exchange coil and/or the waterway heat exchange coil and is used for refrigerating or heating through a refrigerant flow path and/or a waterway.
Further, the terminal device includes: and the pipeline between the outlet of the refrigerant heat exchange coil and the refrigerant outlet of the condenser also passes through the fan coil and is used for refrigerating or heating through the refrigerant flow path.
Further, still include: one end of the waterway bypass pipeline is connected with a water outlet of the air conditioning unit, and the other end of the waterway bypass pipeline is connected with an outlet of the waterway heat exchange coil; and a pipeline between the outlet of the waterway heat exchange coil and the water inlet of the air conditioning unit also passes through the fan coil and is used for refrigerating or heating through the waterway.
Further, still include: the first port of the three-way valve is connected with a water outlet of the air conditioning unit, the second port of the three-way valve is connected with an inlet of the waterway heat exchange coil, and the third port of the three-way valve is connected with a waterway bypass pipeline and used for controlling the opening and closing of the waterway heat exchange coil and the waterway bypass pipeline; and the water pump is positioned between the three-way valve and the water outlet of the air conditioning unit.
Further, the terminal device further includes: and the floor heating coil is positioned on a pipeline between the fan coil and a water inlet of the air conditioning unit and used for heating through a water channel.
Further, still include: the water separator is positioned at the water inlet of the floor heating coil; the water collector is positioned at a water outlet of the floor heating coil; and the differential pressure bypass valve is positioned on a bypass pipeline between the water separator and the water collector and is used for maintaining the differential pressure balance between the water separator and the water collector.
Further, still include: the water outlet temperature sensing bulb is positioned at a water outlet of the air conditioning unit; the water inlet temperature sensing bulb is positioned at a water inlet of the air conditioning unit; the water tank thermal bulb is positioned in the water tank.
Further, still include: the inlet of the refrigerant heat exchange coil is connected with the refrigerant inlet of the condenser through the first flow control valve; the outlet of the refrigerant heat exchange coil is connected with the refrigerant outlet of the condenser through the second flow control valve; the first flow control valve and the second flow control valve are used for controlling the refrigerant flow of the refrigerant heat exchange coil.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit control method, applied to the air conditioning unit, including: detecting temperature parameters of the air conditioning unit; acquiring an operation mode of an air conditioning unit; and controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the temperature parameter and the operation mode.
Further, the temperature parameters include at least: the air conditioning unit inlet water temperature Ti, the air conditioning unit outlet water temperature To, the water tank temperature Tw and the water tank target temperature Tw 1; the operation modes at least comprise: a cooling mode and a heating mode.
Further, controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the temperature parameter and the operation mode includes: under the heating mode, calculating a water tank temperature difference delta T1 and an outlet water temperature change delta T2, and controlling the opening of a three-way valve and the opening of a first flow control valve and a second flow control valve according to the water tank temperature difference delta T1 and the outlet water temperature change delta T2; wherein the water tank temperature difference delta T1 is the difference between the water tank temperature Tw and the water tank target temperature Tw 1; the change delta T2 of the outlet water temperature is the change quantity of the outlet water temperature To of the air conditioning unit in a preset monitoring period; under a refrigeration mode, calculating water temperature change delta T2 and water inlet and outlet temperature difference delta T3, and controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the water outlet temperature change delta T2 and the water inlet and outlet temperature difference delta T3; wherein, the change delta T2 of the outlet water temperature is the change quantity of the outlet water temperature To of the air conditioning unit in a preset monitoring period; the difference delta T3 between the inlet and outlet water temperature is the difference between the outlet water temperature To of the air conditioning unit and the inlet water temperature Ti of the air conditioning unit.
Further, controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the tank temperature difference Δ T1 and the outlet water temperature change Δ T2 includes: when the delta T1 plus the delta T2 is larger than a, the three-way valve is controlled to be opened, and the opening degrees of the first flow control valve and the second flow control valve are adjusted to be K1; wherein a is a first temperature threshold;
alpha is a first opening degree regulating coefficient, and t1 is the duration of a preset monitoring period; when b is less than delta T1 and the sum of delta T2 is less than or equal to a, the opening degrees of the first flow control valve and the second flow control valve are kept unchanged; when the delta T1 plus the delta T2 is less than or equal to b, the opening degrees of the first flow control valve and the second flow control valve are reduced to m; b is a second temperature threshold and is smaller than the first temperature threshold a; and m is the ratio of the minimum frequency to the rated frequency in the heating mode of the air conditioning unit.
Further, the method for controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the outlet water temperature change delta T2 and the inlet and outlet water temperature difference delta T3 comprises the following steps: when the delta T2 plus the delta T3 is larger than c, the three-way valve is controlled to be closed, and the opening degrees of the first flow control valve and the second flow control valve are adjusted to be K2; wherein c is a third temperature threshold;
beta is a second opening degree regulating coefficient, and t1 is the duration of a preset monitoring period; when d is less than delta T2 plus delta T3 and is less than or equal to c, the opening degrees of the first flow control valve and the second flow control valve are kept unchanged; when the delta T2 plus the delta T3 is not more than d, the opening degrees of the first flow control valve and the second flow control valve are reduced to n; wherein d is a fourth temperature threshold and is less than a third temperature threshold c; and n is the ratio of the minimum frequency to the rated frequency of the air conditioning unit in the refrigeration mode.
According to still another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
According to the multifunctional air conditioning system with the water heater, the branch circuits of the refrigerant side and the waterway are directly connected into the water tank and the tail end, so that the installation is convenient, the installation space can be greatly reduced, the refrigerant flow and the waterway flow can be adjusted according to the user requirements, the purpose of controlling the cooling water or heating water speed of a user is achieved, and the problem of poor user comfort caused by too fast or too slow heating water or cooling water speed is effectively solved. The system can meet various comfort requirements and various emergency requirements of users, and improves the comprehensive utilization rate and the energy efficiency of the whole machine.
Drawings
Fig. 1 is a schematic view of an alternative configuration of an air conditioning assembly according to an embodiment of the present invention;
fig. 2 is an alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention.
Description of reference numerals:
1. a compressor; 2. a four-way valve; 3. a condenser; 4. an evaporator; 5. a water tank; 6. a refrigerant heat exchange coil; 7. a waterway heat exchange coil pipe; 8. a fan coil; 9. a three-way valve; 10. a water pump; 11. a floor heating coil pipe; 12. a water separator; 13. a water collector; 14. a differential pressure bypass valve; 15. entering a water temperature sensing bulb; 16. a water outlet temperature sensing bulb; 17. a water tank temperature sensing bulb; 18. a first flow control valve; 19. a second flow control valve; 20. a throttling element; 21. a vapor-liquid separator.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, an air conditioning unit is provided, and specifically, fig. 1 shows an alternative structural schematic diagram of the unit, as shown in fig. 1, the unit includes:
the compressor 1, the four-way valve 2, the condenser 3 and the evaporator 4 are connected in sequence;
a water tank 5;
the refrigerant heat exchange coil 6 and the waterway heat exchange coil 7 are positioned inside the water tank 5 and are used for exchanging heat with water in the water tank 5 to prepare hot water or cold water; wherein, the inlet of the refrigerant heat exchange coil 6 is connected with the refrigerant inlet of the condenser 3, and the outlet of the refrigerant heat exchange coil 6 is connected with the refrigerant outlet of the condenser 3; the inlet of the water channel heat exchange coil 7 is connected with the water outlet of the air conditioning unit, and the outlet of the water channel heat exchange coil 7 is connected with the water inlet of the air conditioning unit.
In the above embodiment, a multifunctional air conditioning system with a water heater is provided, which has the advantages that the refrigerant side and the branch of the water channel are directly connected to the water tank and the tail end, so that the installation is convenient, the installation space can be greatly reduced, the refrigerant flow and the flow of the water channel can be adjusted according to the user requirements, and the purpose of controlling the cooling water or heating water speed of a user is achieved, thereby effectively solving the problem of poor comfort of the user caused by too fast or too slow heating water or cooling water speed. The system can meet various comfort requirements and various emergency requirements of users, and improves the comprehensive utilization rate and the energy efficiency of the whole machine.
The air conditioning unit comprises a water tank 5 for preparing domestic water, and also comprises terminal equipment for heating or refrigerating a user, wherein optional terminal equipment comprises a fan coil 8 and a floor heater, and other terminal equipment can be connected to the system to meet various requirements of the user. In specific implementation, the terminal equipment is connected with the refrigerant heat exchange coil 6 and/or the waterway heat exchange coil 7 as the water tank 5, and is used for refrigerating or heating through a refrigerant flow path and/or a waterway. The refrigerant heat exchange coil 6 corresponds to a refrigerant flow path, and the waterway heat exchange coil 7 corresponds to a waterway of the air conditioning unit.
When the terminal equipment comprises the fan coil 8, a pipeline between the outlet of the refrigerant heat exchange coil 6 and the refrigerant outlet of the condenser 3 also passes through the fan coil 8 and is used for cooling or heating through the refrigerant flow path.
The system also comprises a waterway bypass pipeline, wherein one end of the waterway bypass pipeline is connected with a water outlet of the air conditioning unit, and the other end of the waterway bypass pipeline is connected with an outlet of the waterway heat exchange coil 7; and a pipeline between the outlet of the waterway heat exchange coil 7 and the water inlet of the air conditioning unit also passes through a fan coil 8 and is used for refrigerating or heating through a waterway.
Meanwhile, the traditional wind plate can cause the indoor temperature to rise rapidly or reduce rapidly, air-conditioning diseases such as cold and the like are caused, and the comfort of a user is influenced. Therefore, the fan coil 8 of the present system also performs cooling or heating through the refrigerant passage and the water passage, and can achieve the purpose of adjusting the cooling or heating speed.
In addition, the system further comprises: a first port of the three-way valve 9 is connected with a water outlet of the air conditioning unit, a second port of the three-way valve is connected with an inlet of the waterway heat exchange coil 7, and a third port of the three-way valve is connected with a waterway bypass pipeline and used for controlling the opening and closing of the waterway heat exchange coil 7 and the waterway bypass pipeline; and the water pump 10 is positioned between the three-way valve 9 and the water outlet of the air conditioning unit. The three-way valve 9 can control the opening and closing of the water channel, so that the mode that the terminal equipment and the water tank 5 use the refrigerant flow channel to perform heat exchange independently or use the refrigerant flow channel and the water channel to perform heat exchange simultaneously is realized.
When the terminal equipment comprises the floor heating coil 11, the terminal equipment is positioned on a pipeline between the fan coil 8 and a water inlet of the air conditioning unit and used for heating through a water path. Simultaneously, still include: the water separator 12 is positioned at the water inlet of the floor heating coil pipe 11; the water collector 13 is positioned at a water outlet of the floor heating coil pipe 11; and the pressure difference bypass valve 14 is positioned on a bypass pipeline between the water separator 12 and the water collector 13 and is used for maintaining the pressure difference balance between the water separator 12 and the water collector 13.
As shown in fig. 1, the system further includes: the water outlet temperature sensing bulb 16 is positioned at a water outlet of the air conditioning unit; the water inlet thermal bulb 15 is positioned at a water inlet of the air conditioning unit; and the water tank temperature sensing bulb 17 is positioned in the water tank 5. The temperature sensing bag is used for detecting the temperature parameters of the unit and the temperature parameters of the water tank 5 and controlling the refrigerating and heating processes.
The system also comprises a first flow control valve 18, wherein the inlet of the refrigerant heat exchange coil 6 is connected with the refrigerant inlet of the condenser 3 through the first flow control valve 18; the outlet of the refrigerant heat exchange coil 6 is connected with the refrigerant outlet of the condenser 3 through the second flow control valve 19; the first flow control valve 18 and the second flow control valve 19 are used for controlling the refrigerant flow of the refrigerant heat exchange coil 6. The flow control valve may be a three-way valve as shown in fig. 1.
As shown in fig. 1, the air conditioning unit further includes: a throttling element 20 located between the condenser 3 and the evaporator 4; and a vapor-liquid separator 21 positioned between the compressor 1 and the four-way valve 2.
The air conditioning unit can not only realize the preparation of domestic water, but also realize the refrigeration or heating, and the adjustment of various terminal devices, thereby meeting various requirements of users. The comprehensive utilization efficiency under the refrigeration working condition is improved, random refrigeration is realized, the comprehensive utilization efficiency under the hot water making working condition is improved, and random hot water making is realized. Meanwhile, the use comfort of indoor refrigeration and domestic hot water during refrigeration and hot water production is improved.
Example 2
In a preferred embodiment 2 of the present invention, there is provided an air conditioning unit control method applied to the air conditioning unit in the above embodiment 1. In particular, fig. 2 shows an alternative flow chart of the method, which, as shown in fig. 2, comprises the following steps S202-S206:
s202: detecting temperature parameters of the air conditioning unit;
s204: acquiring an operation mode of an air conditioning unit;
s206: and controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the temperature parameter and the operation mode.
In the above embodiment, a multifunctional air conditioning system with a water heater is provided, which has the advantages that the refrigerant side and the branch of the water channel are directly connected to the water tank and the tail end, so that the installation is convenient, the installation space can be greatly reduced, the refrigerant flow and the flow of the water channel can be adjusted according to the user requirements, and the purpose of controlling the cooling water or heating water speed of a user is achieved, thereby effectively solving the problem of poor comfort of the user caused by too fast or too slow heating water or cooling water speed. The system can meet various comfort requirements and various emergency requirements of users, and improves the comprehensive utilization rate and the energy efficiency of the whole machine.
The position of the bulb has been described in the above embodiment 1, and the temperature parameters at least include, in correspondence with the position of the bulb: the air conditioning unit inlet water temperature Ti, the air conditioning unit outlet water temperature To, the water tank temperature Tw and the water tank target temperature Tw 1. Furthermore, the operating modes of the air conditioning assembly comprise at least: a cooling mode and a heating mode.
Controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the temperature parameter and the operation mode, comprising:
under the heating mode, calculating a water tank temperature difference delta T1 and an outlet water temperature change delta T2, and controlling the opening of a three-way valve and the opening of a first flow control valve and a second flow control valve according to the water tank temperature difference delta T1 and the outlet water temperature change delta T2; wherein the water tank temperature difference delta T1 is the difference between the water tank temperature Tw and the water tank target temperature Tw 1; the change delta T2 of the outlet water temperature is the change quantity of the outlet water temperature To of the air conditioning unit in a preset monitoring period;
under a refrigeration mode, calculating water temperature change delta T2 and water inlet and outlet temperature difference delta T3, and controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the water outlet temperature change delta T2 and the water inlet and outlet temperature difference delta T3; wherein, the change delta T2 of the outlet water temperature is the change quantity of the outlet water temperature To of the air conditioning unit in a preset monitoring period; the difference delta T3 between the inlet and outlet water temperature is the difference between the outlet water temperature To of the air conditioning unit and the inlet water temperature Ti of the air conditioning unit.
Wherein, according to the water tank difference delta T1 and the leaving water temperature change delta T2 control three-way valve's switch and the aperture of first flow control valve and second flow control valve, include:
when the delta T1 plus the delta T2 is larger than a, the three-way valve is controlled to be opened, and the opening degrees of the first flow control valve and the second flow control valve are adjusted to be K1; wherein a is a first temperature threshold;
alpha is a first opening degree regulating coefficient, and t1 is the duration of a preset monitoring period; at the moment, the refrigerant flow path and the waterway heat the water tank at the same time;
when b is less than delta T1 and the sum of delta T2 is less than or equal to a, the opening degrees of the first flow control valve and the second flow control valve are kept unchanged;
when the delta T1 plus the delta T2 is less than or equal to b, the opening degrees of the first flow control valve and the second flow control valve are reduced to m; b is a second temperature threshold and is smaller than the first temperature threshold a; and m is the ratio of the minimum frequency to the rated frequency in the heating mode of the air conditioning unit. At this time, the water tank does not need to be heated, and the three-way valve can be directly closed.
In addition, the opening and closing of the three-way valve and the opening degree of the first flow control valve and the second flow control valve are controlled according to the outlet water temperature change delta T2 and the inlet and outlet water temperature difference delta T3, and the method comprises the following steps:
when the delta T2 plus the delta T3 is larger than c, the three-way valve is controlled to be closed, and the opening degrees of the first flow control valve and the second flow control valve are adjusted to be K2; wherein c is a third temperature threshold;
beta is a second opening degree regulating coefficient, and t1 is the duration of a preset monitoring period; ground heating is not needed during refrigeration, so the three-way valve is closed, a refrigerant flow path is directly used for refrigeration, and the water tank and the fan coil pipe can be used for refrigeration at the same time. When refrigerating, the three-way valve is closed, cold water flowing out of the unit for refrigerating does not pass through the water tank, and otherwise, the water temperature of the water tank is excessively reduced. The water route leads to the fan coil and the floor heating coil, and the fan coil and the floor heating coil are used for achieving quick refrigeration.
When d is less than delta T2 plus delta T3 and is less than or equal to c, the opening degrees of the first flow control valve and the second flow control valve are kept unchanged;
when the delta T2 plus the delta T3 is not more than d, the opening degrees of the first flow control valve and the second flow control valve are reduced to n; wherein d is a fourth temperature threshold and is less than a third temperature threshold c; and n is the ratio of the minimum frequency to the rated frequency of the air conditioning unit in the refrigeration mode. At this time, there are two cases: the refrigeration demand target temperature is reached, and the opening degrees of the first flow control valve and the second flow control valve are reduced to n, so that the indoor temperature is kept by reducing the refrigerant flow of the refrigerant flow path and reducing the frequency of the compressor; further, it is possible to reach the shutdown temperature point without refrigeration. The three-way valve can be directly closed without refrigeration.
Example 3
Based on the air conditioning unit control method provided in embodiment 2 above, there is also provided in a preferred embodiment 3 of the present invention a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. An air conditioning assembly, comprising:
a compressor (1), a four-way valve (2), a condenser (3) and an evaporator (4) which are connected in sequence;
a water tank (5);
the cooling medium heat exchange coil (6) and the waterway heat exchange coil (7) are positioned inside the water tank (5) and are used for exchanging heat with water in the water tank (5) to prepare hot water or cold water; an inlet of the refrigerant heat exchange coil (6) is connected with a refrigerant inlet of the condenser (3), and an outlet of the refrigerant heat exchange coil (6) is connected with a refrigerant outlet of the condenser (3); an inlet of the waterway heat exchange coil (7) is connected with a water outlet of the air conditioning unit, and an outlet of the waterway heat exchange coil (7) is connected with a water inlet of the air conditioning unit;
the terminal equipment is connected with the refrigerant heat exchange coil (6) and the waterway heat exchange coil (7) and is used for refrigerating or heating through a refrigerant flow path and a waterway;
the terminal device includes:
the pipeline between the outlet of the refrigerant heat exchange coil (6) and the refrigerant outlet of the condenser (3) also passes through the fan coil (8) and is used for refrigerating or heating through a refrigerant flow path;
one end of the waterway bypass pipeline is connected with a water outlet of the air conditioning unit, and the other end of the waterway bypass pipeline is connected with an outlet of the waterway heat exchange coil (7); and a pipeline between the outlet of the waterway heat exchange coil (7) and the water inlet of the air conditioning unit also passes through the fan coil (8) and is used for refrigerating or heating through a waterway.
2. The air conditioning assembly as set forth in claim 1, further comprising:
a first port of the three-way valve (9) is connected with a water outlet of the air conditioning unit, a second port of the three-way valve is connected with an inlet of the waterway heat exchange coil (7), and a third port of the three-way valve is connected with the waterway bypass pipeline and used for controlling the waterway heat exchange coil (7) and the waterway bypass pipeline to be opened and closed;
and the water pump (10) is positioned between the three-way valve (9) and the water outlet of the air conditioning unit.
3. The air conditioning assembly as set forth in claim 1, wherein the terminal equipment further includes:
and the floor heating coil (11) is positioned on a pipeline between the fan coil (8) and a water inlet of the air conditioning unit and is used for heating through a water channel.
4. The air conditioning assembly as set forth in claim 3, further comprising:
the water separator (12) is positioned at the water inlet of the floor heating coil (11);
the water collector (13) is positioned at a water outlet of the floor heating coil (11);
a differential pressure bypass valve (14) located on a bypass line between the water separator (12) and the water collector (13) for maintaining a differential pressure balance between the water separator (12) and the water collector (13).
5. The air conditioning assembly as set forth in claim 1, further comprising:
the water inlet temperature sensing bulb (15) is positioned at a water inlet of the air conditioning unit;
the water outlet temperature sensing bulb (16) is positioned at a water outlet of the air conditioning unit;
the water tank thermal bulb (17) is positioned in the water tank (5).
6. The air conditioning assembly as set forth in claim 1, further comprising:
the inlet of the refrigerant heat exchange coil (6) is connected with the refrigerant inlet of the condenser (3) through the first flow control valve (18);
the outlet of the refrigerant heat exchange coil (6) is connected with the refrigerant outlet of the condenser (3) through the second flow control valve (19);
the first flow control valve (18) and the second flow control valve (19) are used for controlling the refrigerant flow of the refrigerant heat exchange coil (6).
7. An air conditioning unit control method applied to the air conditioning unit according to any one of claims 1 to 6, characterized by comprising:
detecting a temperature parameter of the air conditioning unit;
acquiring an operation mode of the air conditioning unit;
and controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the temperature parameter and the operation mode.
8. The method according to claim 7, characterized in that said temperature parameters comprise at least: the air conditioning unit inlet water temperature Ti, the air conditioning unit outlet water temperature To, the water tank temperature Tw and the water tank target temperature Tw 1; the operating modes include at least: a cooling mode and a heating mode.
9. The method of claim 8, wherein controlling the opening and closing of the three-way valve and the opening degrees of the first and second flow control valves according to the temperature parameter and the operation mode comprises:
under the heating mode, calculating a water tank temperature difference delta T1 and an outlet water temperature change delta T2, and controlling the opening of the three-way valve and the opening of the first flow control valve and the second flow control valve according to the water tank temperature difference delta T1 and the outlet water temperature change delta T2; wherein the tank temperature difference Δ T1 is a difference between the tank temperature Tw and the tank target temperature Tw 1; the change delta T2 of the outlet water temperature is the change quantity of the outlet water temperature To of the air conditioning unit in a preset monitoring period;
in a refrigeration mode, calculating the water outlet temperature change delta T2 and the water inlet and outlet temperature difference delta T3, and controlling the opening and closing of the three-way valve and the opening degrees of the first flow control valve and the second flow control valve according to the water outlet temperature change delta T2 and the water inlet and outlet temperature difference delta T3; the change delta T2 of the outlet water temperature is the change quantity of the outlet water temperature To of the air conditioning unit in a preset monitoring period; and the water inlet and outlet temperature difference delta T3 is the difference between the water outlet temperature To of the air conditioning unit and the water inlet temperature Ti of the air conditioning unit.
10. The method of claim 9, wherein controlling the opening and closing of the three-way valve and the opening of the first and second flow control valves according to the tank temperature difference Δ T1 and the outlet water temperature change Δ T2 comprises:
when the delta T1 plus the delta T2 is larger than a, the three-way valve is controlled to be opened, and the opening degrees of the first flow control valve and the second flow control valve are adjusted to be K1; wherein a is a first temperature threshold;
alpha is a first opening degree adjusting coefficient, and t1 is the duration of the preset monitoring period;
when b is less than delta T1 plus delta T2 is less than or equal to a, the opening degrees of the first flow control valve and the second flow control valve are kept unchanged;
when the opening degrees of the first flow control valve and the second flow control valve are smaller than or equal to m when the opening degree of the delta T1 and the opening degree of the delta T2 are smaller than or equal to b; b is a second temperature threshold and is smaller than the first temperature threshold a; and m is the ratio of the minimum frequency to the rated frequency in the heating mode of the air conditioning unit.
11. The method of claim 9, wherein controlling the opening of the three-way valve and the first and second flow control valves based on the leaving water temperature change Δ T2 and the entering and exiting water temperature difference Δ T3 comprises:
at Δ T2 +. DELTA T3 > cControlling the three-way valve to be closed, and adjusting the opening degrees of the first flow control valve and the second flow control valve to be K2; wherein c is a third temperature threshold;
beta is a second opening degree adjusting coefficient, and t1 is the duration of the preset monitoring period;
when d is less than delta T2 plus delta T3 and less than or equal to c, the opening degrees of the first flow control valve and the second flow control valve are kept unchanged;
when delta T2 and delta T3 are not more than d, the opening degrees of the first flow control valve and the second flow control valve are reduced to n; wherein d is a fourth temperature threshold and is less than the third temperature threshold c; and n is the ratio of the minimum frequency to the rated frequency of the air conditioning unit in the refrigeration mode.
12. A storage medium containing computer-executable instructions for performing the air conditioning pack control method of any of claims 7 to 11 when executed by a computer processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010976506.1A CN112161350B (en) | 2020-09-15 | 2020-09-15 | Air conditioning unit with adjustable heat exchange rate and control method thereof |
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| CN202010976506.1A CN112161350B (en) | 2020-09-15 | 2020-09-15 | Air conditioning unit with adjustable heat exchange rate and control method thereof |
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| CN105910317B (en) * | 2016-04-18 | 2019-06-18 | 广东高而美制冷设备有限公司 | Speed heat combined supply system |
| CN107192058A (en) * | 2017-06-09 | 2017-09-22 | 中国地质大学（武汉） | A kind of joint energy supplying system of solar energy and underground water source |
| CN110296490B (en) * | 2019-06-27 | 2020-11-20 | 珠海格力电器股份有限公司 | Hot water unit with constant temperature hot water function and control method thereof |
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