CN113513855B - Improved air-cooled cold and hot water unit - Google Patents
Improved air-cooled cold and hot water unit Download PDFInfo
- Publication number
- CN113513855B CN113513855B CN202110611375.1A CN202110611375A CN113513855B CN 113513855 B CN113513855 B CN 113513855B CN 202110611375 A CN202110611375 A CN 202110611375A CN 113513855 B CN113513855 B CN 113513855B
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- China
- Prior art keywords
- water
- heat exchanger
- control valve
- side heat
- client
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 188
- 238000004378 air conditioning Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000010257 thawing Methods 0.000 claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims description 25
- 238000004146 energy storage Methods 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
-
- 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
-
- 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
- F24H9/14—Arrangements for connecting different sections, e.g. in water heaters
- F24H9/142—Connecting hydraulic components
- F24H9/144—Valve seats, piping and heat exchanger connections integrated into a one-piece hydraulic unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to an improved air-cooled cold and hot water unit, which comprises an air conditioning unit and a water tank, wherein a water side heat exchanger of the air conditioning unit is connected with a client through an outlet waterway and an inlet waterway to form a water circulation system, and a bypass is arranged between an inlet and an outlet of the client; the bypass is provided with a control valve II capable of controlling on-off; the water tank is connected in parallel with the inlet waterway or the outlet waterway; a control valve I capable of controlling on-off is arranged on a waterway between an inlet and an outlet of the water tank. The invention can effectively improve the refrigerating and heating speeds of the unit in the starting stage, quickly meet the requirements of users and improve the comfort level of the users. Meanwhile, in the defrosting process, larger water temperature fluctuation of the client can be avoided, and user experience is improved.
Description
Technical Field
The invention relates to an air conditioning system, in particular to a cold and hot water unit, and specifically relates to an improved air-cooled cold and hot water unit.
Background
At present, the existing air-cooled cold and hot water unit is mainly provided with a water tank in a water system for energy storage and buffering so as to reduce the frequent start and stop times of a heat pump and utilize low-valley electricity for heat storage and the like. However, after the water system is added into the water tank, the capacity of the water system is increased, so that the refrigerating and heating speeds of the unit are reduced when the unit is just started, and the using effect is affected. In addition, in the heating process, when the unit reaches a defrosting condition, the heat of defrosting comes from hot water of the client, so that the water temperature of the client in the defrosting process fluctuates greatly, cold air and other phenomena are easy to occur, and bad experience is brought to the client.
Therefore, improvements are urgently needed to better enhance crew performance and improve user experience.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides an improved air-cooled cold and hot water unit, which can effectively improve the refrigerating and heating speeds of the unit in the starting stage and quickly meet the demands of users. Meanwhile, in the defrosting process, larger water temperature fluctuation of the client can be avoided, and user experience is improved.
The technical scheme of the invention is as follows:
an improved air-cooled cold and hot water unit comprises an air conditioning unit and a water tank, wherein a water side heat exchanger of the air conditioning unit is connected with a client through an outlet waterway and an inlet waterway to form a water circulation system, and a bypass is arranged between an inlet and an outlet of the client; the bypass is provided with a control valve II capable of controlling on-off; the water tank is connected in parallel with the inlet waterway or the outlet waterway; a control valve I capable of controlling on-off is arranged on a waterway between an inlet and an outlet of the water tank.
Further, the control valve I is any one of an electromagnetic valve, an electric two-way valve, an electric three-way valve or an electric ball valve.
Further, the control valve II is any one of an electromagnetic valve, an electric two-way valve, an electric three-way valve or an electric ball valve.
Further, the air conditioning unit comprises a refrigerant circulation loop formed by mutually connecting a compressor, a four-way valve, a water side heat exchanger, a throttling device and a wind side heat exchanger, so that the air conditioning unit realizes a refrigerating or heating function.
Further, a water pump is arranged on the outlet waterway or the inlet waterway.
The invention has the beneficial effects that:
the invention has reasonable design, simple structure and convenient control, can effectively improve the refrigerating and heating speeds of the machine set in the starting stage and quickly meets the demands of users. Meanwhile, in the defrosting process, larger water temperature fluctuation of the client can be avoided, and user experience is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the system principle of the present invention.
Wherein: 1-an air conditioning unit; 2-a water tank; 3-control valve I; 4-control valve II; 5-a client; 6-a water pump; 11-a compressor; 12-a four-way valve; 13-water side heat exchanger; 14-a throttle device; 15-wind side heat exchanger.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 and 2.
An improved air-cooled cold and hot water unit comprises an air conditioning unit 1 and a water tank 2.
The air conditioning unit comprises a refrigerant circulation loop formed by mutually connecting a compressor 11, a four-way valve 12, a water side heat exchanger 13, a throttling device 14 and a wind side heat exchanger 15, and can realize refrigeration or heating functions.
The water path part of the water side heat exchanger 13 of the air conditioning unit is connected with the client 5 through an outlet water path and an inlet water path to form a water circulation system, and cold water or hot water can be provided for clients. A bypass is arranged between an inlet and an outlet of the client, and a control valve II4 capable of controlling on-off is arranged on the bypass, so that the on-off of the bypass can be controlled, and the use requirement is met.
The water tank 2 is connected in parallel with the inlet waterway or the outlet waterway and can store energy and buffer the water tank. The control valve I3 capable of controlling on-off is arranged on the waterway between the inlet and the outlet of the water tank 2, so that the water tank 2 can be controlled to be communicated into the water circulation pipeline or disconnected from the water circulation pipeline, and the use requirement is met.
The wind side heat exchanger 15 may be a fin heat exchanger.
The control valve I3 is any one of an electromagnetic valve, an electric two-way valve, an electric three-way valve or an electric ball valve, and can control the opening or the closing degree, so that the valve is convenient to select.
The control valve II4 is any one of an electromagnetic valve, an electric two-way valve, an electric three-way valve or an electric ball valve, and can control the opening or the closing degree, so that the valve is convenient to select.
The water pump 6 is arranged on the outlet waterway or the inlet waterway, so that the normal operation of water circulation can be ensured.
The application method of the invention comprises the following steps:
1. during refrigeration, the working process of the refrigerant circulation system is as follows: the compressor discharges high-temperature and high-pressure gas refrigerant, the gas refrigerant enters the air side heat exchanger through the four-way valve to be condensed and radiated to form high-pressure and medium-temperature refrigerant, the refrigerant is throttled into low-temperature and low-pressure two-phase refrigerant through the throttling device, the refrigerant enters the water side heat exchanger to absorb heat and evaporate, and the gas refrigerant after absorbing heat and evaporating enters the compressor through the four-way valve.
The working process of the water system during refrigeration is as follows: when the engine is started, the control valve I is opened, and the control valve II is closed. At this time, the circulating water with lower temperature flowing out of the water side heat exchanger flows into the client to absorb heat after passing through the water pump and the control valve I, and then returns to the water side heat exchanger to complete water circulation, so that the temperature of the client can be quickly reduced, and the user experience is improved.
When the water temperature of the client reaches the requirement, the control valve I is closed, and the control valve II is opened. At this time, the low-temperature water flowing out of the water side heat exchanger flows into the water tank after passing through the water pump, is mixed with the water in the water tank, and then flows back to the water side heat exchanger through the control valve II to complete water circulation and realize energy storage.
When the temperature in the water tank and the water temperature at the client are close or equal, both control valves I and II are closed. At the moment, water flowing out of the water side heat exchanger flows back to the water side heat exchanger after passing through the water tank and the client in sequence, so that water circulation is completed, balance between water in the water tank and water in the client can be realized, and unit operation is more stable.
During heating, the working process of the refrigerant circulation system is as follows: the compressor discharges high-temperature and high-pressure gas refrigerant, enters the water side heat exchanger through the four-way valve to perform condensation and heat dissipation, forms high-pressure medium-temperature refrigerant, and performs heat exchange with circulating water in the waterway. Then, the air is throttled into a low-temperature low-pressure two-phase refrigerant through a throttling device, and the low-temperature low-pressure two-phase refrigerant enters the wind side heat exchanger to absorb heat and evaporate, so that air heat exchange is realized. And finally, the gas refrigerant subjected to heat absorption and evaporation flows back to the compressor after passing through the four-way valve, so that refrigerant circulation is completed.
The working process of the water system during heating is as follows: when the engine is started, the control valve I is opened, and the control valve II is closed. At this time, the circulating water with higher temperature flowing out of the water side heat exchanger flows into the client side to dissipate heat after passing through the water pump and the control valve I, then returns to the water side heat exchanger to complete water circulation, and the temperature of the client side can be quickly increased, so that the user experience is improved.
When the water temperature of the client reaches the requirement, the control valve I is closed, and the control valve II is opened. At this time, the circulating water with higher temperature flowing out of the water side heat exchanger flows into the water tank after passing through the water pump and the control valve II, is mixed with the water of the water tank, and then returns to the water side heat exchanger to complete water circulation, realize energy storage and improve the efficiency of the unit.
When the temperature in the water tank and the water temperature at the client are close or equal, both control valves I and II are closed. At the moment, water flowing out of the water side heat exchanger flows back to the water side heat exchanger after passing through the water tank and the client in sequence, so that water circulation is completed, balance between water in the water tank and water in the client can be realized, and unit operation is more stable.
When the unit reaches a defrosting condition in the heating process, the unit enters a defrosting mode, and the working process of a refrigerant circulation system is as follows: the compressor discharges high-temperature and high-pressure gas refrigerant, enters the air side heat exchanger through the four-way valve to perform condensation and heat dissipation, forms high-medium-pressure and medium-temperature refrigerant, and ablates frost of the heat exchanger. Then, the two-phase refrigerant with low temperature and low pressure is throttled by the throttling device, enters the water side heat exchanger for heat absorption and evaporation, and exchanges heat with circulating water. And finally, enabling the gas refrigerant subjected to heat absorption and evaporation to enter a compressor through a four-way valve, and completing refrigerant circulation.
In the water system in the defrosting process, the control valve I is closed, the control valve II is opened, at the moment, circulating water exchanges heat and radiates heat through the water side to form low-temperature water, and the low-temperature water flows into the water tank after passing through the water pump and is mixed with water in the water tank, so that the water temperature is increased. Then, the water flows back to the water side heat exchanger after passing through the control valve II, and the water circulation is completed. Therefore, not only can the heat exchange requirement required by refrigerant circulation be met, but also severe fluctuation of the temperature of the client can be avoided, and the user experience is improved.
The invention is not related in part to the same as or can be practiced with the prior art.
Claims (4)
1. An improved air-cooled cold and hot water unit comprises an air conditioning unit and a water tank, wherein a water side heat exchanger of the air conditioning unit is connected with a client through an outlet waterway and an inlet waterway to form a water circulation system, and the air conditioning unit is characterized in that a bypass is arranged between an inlet and an outlet of the client; the bypass is provided with a control valve II capable of controlling on-off; the water tank is connected in parallel with the inlet waterway or the outlet waterway; a control valve I capable of controlling on-off is arranged on a waterway between an inlet and an outlet of the water tank, and the air conditioning unit comprises a refrigerant circulation loop formed by mutually connecting a compressor, a four-way valve, a water side heat exchanger, a throttling device and a wind side heat exchanger, so that the air conditioning unit realizes a refrigerating or heating function; in the water system in the defrosting process, the control valve I is closed, the control valve II is opened, at the moment, circulating water exchanges heat and dissipates heat through the water side to form low-temperature water, the low-temperature water flows into the water tank after passing through the water pump and is mixed with water in the water tank to raise the water temperature, and then flows back to the water side heat exchanger after passing through the control valve II to complete water circulation;
the working process of the water system during refrigeration is as follows: when the water-side heat exchanger is started, the control valve I is opened, the control valve II is closed, and at the moment, circulating water with lower temperature flowing out of the water-side heat exchanger flows into a client to absorb heat after passing through the water pump and the control valve I, and then returns to the water-side heat exchanger to complete water circulation; when the water temperature of the client reaches the requirement, the control valve I is closed, the control valve II is opened, at the moment, the low-temperature water flowing out of the water side heat exchanger flows into the water tank after passing through the water pump, is mixed with the water in the water tank, and then flows back to the water side heat exchanger through the control valve II to complete water circulation and realize energy storage; when the temperature in the water tank is equal to the water temperature of the client, the control valves I and II are closed, at the moment, water flowing out of the water side heat exchanger flows back to the water side heat exchanger after passing through the water tank and the client in sequence, water circulation is completed, and balance between the water in the water tank and the water in the client is realized;
the working process of the water system during heating is as follows: when the water-side heat exchanger is started, the control valve I is opened, the control valve II is closed, at the moment, circulating water with higher temperature flowing out of the water-side heat exchanger flows into the client side to dissipate heat after passing through the water pump and the control valve I, then returns to the water-side heat exchanger to complete water circulation, the temperature of the client side can be quickly increased, and the user experience is improved; when the water temperature of the client reaches the requirement, the control valve I is closed, the control valve II is opened, at the moment, circulating water with higher temperature flowing out of the water side heat exchanger flows into the water tank after passing through the water pump and the control valve II, is mixed with water of the water tank, and then returns to the water side heat exchanger to complete water circulation, realize energy storage and improve the efficiency of the unit; when the temperature in the water tank is close to or equal to the water temperature of the client, the control valves I and II are closed, and at the moment, water flowing out of the water side heat exchanger flows back to the water side heat exchanger after passing through the water tank and the client in sequence, so that water circulation is completed, and balance between the water of the water tank and the water of the client is realized.
2. The improved air-cooled hot and cold water unit according to claim 1, wherein the control valve I is any one of a solenoid valve, an electric two-way valve, an electric three-way valve or an electric ball valve.
3. The improved air-cooled hot and cold water unit according to claim 1, wherein the control valve II is any one of a solenoid valve, an electric two-way valve or an electric three-way valve or an electric ball valve.
4. The improved air-cooled hot and cold water unit according to claim 1, wherein a water pump is arranged on the outlet waterway or the inlet waterway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110611375.1A CN113513855B (en) | 2021-06-02 | 2021-06-02 | Improved air-cooled cold and hot water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110611375.1A CN113513855B (en) | 2021-06-02 | 2021-06-02 | Improved air-cooled cold and hot water unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113513855A CN113513855A (en) | 2021-10-19 |
| CN113513855B true CN113513855B (en) | 2023-12-12 |
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ID=78065222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110611375.1A Active CN113513855B (en) | 2021-06-02 | 2021-06-02 | Improved air-cooled cold and hot water unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN113513855B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097090A (en) * | 2007-06-22 | 2008-01-02 | 滁州扬子必威中央空调有限公司 | Cold water bypass defrosting air source heat pump and set hot-water and control method thereof |
| CN107228428B (en) * | 2017-07-17 | 2022-08-02 | 西安建筑科技大学 | Household fresh air purification full air conditioning system |
| CN109945356A (en) * | 2019-01-30 | 2019-06-28 | 东南大学 | The remodeling method and device of cold source of air conditioning cascade utilization and accumulation of energy |
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2021
- 2021-06-02 CN CN202110611375.1A patent/CN113513855B/en active Active
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| Publication number | Publication date |
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| CN113513855A (en) | 2021-10-19 |
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