CN111457509A - Energy-saving air conditioner - Google Patents
Energy-saving air conditioner Download PDFInfo
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- CN111457509A CN111457509A CN202010237038.6A CN202010237038A CN111457509A CN 111457509 A CN111457509 A CN 111457509A CN 202010237038 A CN202010237038 A CN 202010237038A CN 111457509 A CN111457509 A CN 111457509A
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- cooling
- water
- cold water
- pipe
- air conditioner
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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
- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
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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
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0233—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes the conduits having a particular shape, e.g. non-circular cross-section, annular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C2001/006—Systems comprising cooling towers, e.g. for recooling a cooling medium
Abstract
The invention discloses an energy-saving air conditioner, which relates to the technical field of air conditioner refrigeration and comprises a refrigeration system, a ventilation system and a control system, wherein the refrigeration system comprises an air cooling circulation system and a water cooling circulation system, and the air cooling circulation system comprises a variable frequency compressor, a condenser and a first cold water plate heat exchanger; the water-cooling circulating system comprises a cooling tower, a wet bulb thermometer and a cooling pipe are arranged on the side wall of the cooling tower, a circulating water tank is arranged at the bottom of the cooling tower, a spray head is arranged in the cooling tower and communicated with the circulating water tank through a pipeline, and a water pumping device is further arranged on one side of the cooling tower; the ventilation system comprises an air conditioner internal unit and a second cold water plate heat exchanger. The invention provides an energy-saving air conditioner with diversified refrigeration modes, low refrigeration energy consumption, less use times of a compressor and long service life of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioner refrigeration, in particular to an energy-saving air conditioner.
Background
Under the external environment with increasingly serious global energy crisis and environmental problems and the internal environment with short power supply in China, energy conservation has great significance for economic development and modernized construction in China, and the design of energy-saving air-conditioning products can actively respond to the national energy-saving policy.
At present, the number of large and medium subway equipment rooms is more and more, and the load is also more and more in application scenes (such as large machine rooms and the like), so that the refrigeration power consumption of an air conditioning system of the equipment rooms is reduced, and the reduction of the pPUE value is realized. Most of the existing air conditioners applied to heat dissipation equipment rooms for year-round refrigeration are air-cooled air conditioners; the heat is transferred completely by single compression refrigeration cycle, the outdoor temperature is lower than the indoor temperature in many high-latitude areas, the heat is spontaneously diffused and transferred to the outdoor along with the temperature gradient, and the heat transfer by the refrigeration cycle of the air-conditioning variable-frequency compressor is a great waste of energy. In addition, frequent start-stop of the inverter compressor can aggravate the loss of the compression equipment, shorten the service life of the compressor, and finally lead to the early damage of the whole air conditioning system, so that the compressor has a place to be improved.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide an energy-saving air conditioner, which solves the problem of the operation mode of a single vapor compressor refrigeration unit, effectively saves the energy consumed by the refrigeration of the air conditioning unit, reduces the number of times of using a variable frequency compressor, and prolongs the service life of the whole air conditioning unit.
In order to achieve the purpose, the invention provides the following technical scheme:
an energy-saving air conditioner comprises a refrigerating system, a ventilating system and a control system, wherein the refrigerating system comprises an air cooling circulating system and a water cooling circulating system, the air cooling circulating system comprises a variable frequency compressor, a condenser and a first cold water plate heat exchanger, the variable frequency compressor, the condenser and the first cold water plate heat exchanger are sequentially communicated through pipelines, namely, the variable frequency compressor conveys a refrigerant to the condenser for refrigeration, the refrigerated refrigerant is conveyed to the first cold water plate heat exchanger for realizing refrigerant heat exchange, and finally the refrigerant is conveyed from the first cold water plate heat exchanger to the variable frequency compressor to complete primary air cooling circulation; the water-cooling circulation system comprises a cooling tower, a wet bulb thermometer for detecting the space temperature of the cooling tower is fixedly arranged on the side wall of the cooling tower, a circulation water tank is arranged at the bottom of the cooling tower, a cooling pipe is arranged on the side wall of the cooling tower in a penetrating manner, the cooling pipe is arranged above the circulation water tank, a spray header is arranged in the cooling tower, the spray header is arranged right above the cooling pipe and communicated with the circulation water tank through a pipeline, and a water pumping device for pumping water in the circulation water tank into the spray header is further arranged on one side of the cooling tower; the ventilation system comprises an air conditioner internal unit and a plurality of second cold water plate heat exchangers, wherein the air conditioner internal unit comprises a U-shaped heat pipe evaporator and an air supply fan, the air supply fan is arranged right opposite to the U-shaped heat pipe evaporator, the U-shaped heat pipe evaporator is communicated with the second cold water plate heat exchangers through pipelines to form a refrigeration loop, the second cold water plate heat exchangers are communicated with the cooling pipes through pipelines to form a first heat exchange loop pipeline, and the first cold water plates are communicated with the cooling pipes through exchange pipes to form a second heat exchange loop pipeline between the first cold water plate heat exchangers and the second cold water plate heat exchangers; the control system comprises an air conditioner control module, and the variable frequency compressor, the wet bulb thermometer and the water pumping device are electrically connected with the air conditioner control module.
The invention is further configured to: the cooling pipe includes cooling outlet pipe and cooling inlet tube, first cold water board heat exchanger is close to second cold water board heat exchanger one end and is provided with outlet pipe and inlet tube, the outlet pipe with cooling outlet pipe connection department is the nodical for the play water, the inlet tube with cooling inlet pipe connection department is the nodical for intaking, be provided with cold water outlet temperature sensor on the cooling outlet pipe, cold water outlet temperature sensor sets up it reaches to go out the water nodical on the cooling outlet pipe between the cooling tower, be provided with cold water inlet temperature sensor on the cooling inlet tube, cold water inlet temperature sensor sets up intake nodical reach on the cooling inlet tube between the cooling tower, cold water outlet temperature sensor cold water inlet temperature sensor all with air conditioner control module electric connection.
The invention is further configured to: the cooling water outlet pipe reaches all be provided with the cold water solenoid valve on the cooling inlet tube, each the cold water solenoid valve sets up respectively between a water crossing point and cooling tower and between a water crossing point and cooling tower, be provided with cold water outlet solenoid valve on the outlet pipe, cold water outlet solenoid valve sets up between a water crossing point and first cold water plate heat exchanger, be provided with cold water inlet solenoid valve on the inlet tube, cold water inlet solenoid valve sets up between a water crossing point and first cold water plate heat exchanger, cold water solenoid valve cold water outlet solenoid valve cold water inlet solenoid valve all with air conditioner control module electric connection.
The invention is further configured to: the mounting position of the second cold water plate heat exchanger is at least 1m higher than that of the U-shaped heat pipe evaporator in the vertical direction, a tail end electronic expansion valve is arranged on a pipeline between the U-shaped heat pipe evaporator and the second cold water plate heat exchanger, and the tail end electronic expansion valve is electrically connected with the air conditioner control module.
The invention is further configured to: the U-shaped heat pipe evaporator comprises U-shaped heat pipes, the U-shaped heat pipes are provided with a plurality of groups, each U-shaped heat pipe is arranged side by side and staggered, pipe orifices at two ends of the U-shaped heat pipes are respectively communicated with a water inlet and a water outlet of the second cold water plate heat exchanger, a first check valve is arranged at the outlet end of the U-shaped heat pipes, an electromagnetic valve is arranged at the inlet end of each U-shaped heat pipe, and the electromagnetic valve is electrically connected with the air conditioner control module.
The invention is further configured to: the air outlet has been seted up at the cooling tower top, the air intake has been seted up on the cooling tower lateral wall, the air intake with form the forced air cooling region between the air outlet, the air outlet is provided with the exhaust fan, the exhaust fan is just being used for accelerateing circulation of air in the cooling tower to the air outlet setting, just the air outlet is seted up in the cooling tube below, promptly the cooling tube sets up in the forced air cooling region, the exhaust fan with air conditioner control module electric connection.
The invention is further configured to: the water pumping device is a variable frequency water pump, the variable frequency water pump is arranged in a pipeline between the circulating water tank and the spray header, first cooling water ball valves are arranged on pipelines on the water conveying side and the water inlet side of the variable frequency water pump, and a cold water pump shockproof lock head is arranged between the variable frequency water pump and the first cooling water ball valves.
The invention is further configured to: and a soft water treatment device is connected in series on the pipeline between the spray header and the circulating water tank.
The invention is further configured to: and a cold water pump for accelerating water circulation is arranged in a heat exchange pipeline of the second cold water plate heat exchanger, second cooling water ball valves are arranged on a water conveying side and a water inlet side pipeline of the cold water pump, and a cold water pump shockproof lock head is arranged between the cold water pump and the second cooling water ball valves.
The invention is further configured to: an oil separator is arranged between the variable frequency compressor and the condenser in series, and a gas-liquid separator is arranged between the variable frequency compressor and the first cold water plate heat exchanger in series.
In conclusion, the invention has the following beneficial effects:
1. the air conditioner can convey a refrigerant to the condenser through the variable-frequency compressor frame for cooling, then convey the cooled refrigerant to the first cold water plate heat exchanger, realize heat exchange between the first cold water plate heat exchanger and the second cold water plate heat exchanger through the first heat exchange loop, and finally carry out heat exchange between the air conditioner internal unit and the second cold water plate heat exchanger and carry out cooling operation through the air conditioner internal unit; in addition, the air conditioner can also cool the cooling pipe in the cooling tower through the spray header in the cooling tower, so that the temperature of a refrigerant in the cooling pipe is reduced, heat exchange between the cooling pipe and the second cold water plate heat exchanger is realized through the second heat exchange loop, and finally, the air conditioner internal unit and the second cold water plate heat exchanger perform heat exchange and perform cooling operation through the air conditioner internal unit; in actual use, a user can adopt air-conditioning air-cooling operation or air-conditioning water-cooling operation according to the air temperature condition of actual conditions, and in conclusion, different working modes are adopted according to different conditions, so that the use times of the variable frequency compressor can be effectively reduced, the loss of the variable frequency compressor is reduced, the service life of the whole air conditioner is prolonged, in addition, the air-conditioning refrigeration is carried out through water cooling, the electric energy loss is effectively reduced, the environment is protected, the energy is saved, and the use cost of the air conditioner can be effectively reduced;
2. through the arranged cold water electromagnetic valve, the cold water outlet electromagnetic valve and the cold water inlet electromagnetic valve, when air cooling circulation is carried out, the cold water outlet electromagnetic valve and the cold water inlet electromagnetic valve are closed, so that the cold energy loss caused by the fact that the refrigerant in the first loop flows into the cooling pipe is avoided, and when water cooling circulation is carried out, the cold water electromagnetic valve is closed, so that the cold energy loss caused by the fact that the refrigerant in the second loop flows into the first cold water plate heat exchanger is avoided, therefore, the cold energy loss of the air conditioner in different modes is greatly reduced, the energy loss is effectively reduced, and the use cost of the;
3. the installation position of the second cold water plate heat exchanger is at least 1m higher than that of the U-shaped heat pipe evaporator in the vertical direction, so that the refrigerant between the second cold water plate heat exchanger and the U-shaped heat pipe evaporator sinks into the U-shaped heat pipe evaporator through the self gravity of the refrigerant, the refrigerant in the U-shaped heat pipe absorbs heat and becomes gas, the gas generates density difference and flows back into the second cold water plate heat exchanger to absorb heat again with the cold water heat exchanger and becomes liquid refrigerant, and the refrigeration cycle between the air conditioner internal unit and the second cold water heat exchange plate is completed, and the mode does not depend on a refrigerant pump to perform refrigerant cycle, further reduces energy consumption and reduces the use cost of the air conditioner;
4. in addition, the staggered arrangement mode is adopted, the U-shaped heat pipes are not mutually interfered, so that the maintenance is convenient, and when a leakage point occurs in a single U-shaped heat pipe, the leakage repairing maintenance can be directly carried out on the corresponding U-shaped heat pipe;
5. pipe orifices at two ends of the U-shaped heat pipe are respectively communicated with a water inlet and a water outlet of the second cold water plate heat exchanger, a first one-way valve is arranged at the outlet end of the U-shaped heat pipe, an electromagnetic valve is arranged at the inlet end of the U-shaped heat pipe, when the cold quantity required by load equipment is low, the outer wall area of the U-shaped heat pipe in actual operation is controlled by adjusting the opening degree of the electromagnetic valve, the cold quantity provided for the load is reduced, the heat dissipation quantity of the second cold water plate heat exchanger is degraded, the flow of the second cold water plate heat exchanger is reduced, the reduction of the operation energy consumption of a cooling tower or a variable frequency compressor is facilitated, the operation energy;
6. by utilizing the air outlet, the air inlet and the exhaust fan which are arranged on the cooling tower, when the outdoor temperature is too low, water in the circulating water tank is frozen, and workers can cool the cooling pipe by opening the exhaust fan to enable an air cooling area to be formed between the air inlet and the air outlet of the cooling tower, so that the cooling of a refrigerant in the cooling pipe is realized, the energy consumption of an air conditioner is reduced, and the energy is saved.
Drawings
FIG. 1 is a schematic diagram of the system mechanism of an energy-saving air conditioner of the present invention;
FIG. 2 is a schematic structural diagram of a water cooling cycle system of an energy-saving air conditioner according to the present invention;
FIG. 3 is a schematic view of a heat exchange pipe of an energy saving type air conditioner according to the present invention;
FIG. 4 is a schematic view showing an arrangement cross section of a U-shaped heat pipe evaporator of an energy saving type air conditioner according to the present invention;
FIG. 5 is a schematic diagram of a cross section of a U-shaped heat pipe of an energy-saving air conditioner in a staggered arrangement.
Reference numerals: 10. a refrigeration system; 20. a ventilation system; 21. an air conditioner indoor unit; 211. a U-shaped heat pipe evaporator; 212. an air supply fan; 213. a U-shaped heat pipe; 214. a first check valve; 215. an electromagnetic valve; 22. a second cold water plate heat exchanger; 221. a third outlet; 222. a third inlet; 223. a fourth outlet; 224. a fourth inlet; 23. a terminal electronic expansion valve; 30. an air cooling circulating system; 31. a variable frequency compressor; 32. a condenser; 321. a fan; 33. a first cold water plate heat exchanger; 331. a water outlet pipe; 332. a water inlet pipe; 333. a first outlet; 334. a first inlet; 335. a second inlet; 336. a second outlet; 34. an oil separator; 35. a gas-liquid separator; 36. compressing the electromagnetic valve; 37. a low pressure sensor; 38. a high pressure sensor; 39. a second one-way valve; 391. a filter; 392. an electronic expansion valve; 40. a water-cooling circulation system; 41. a cooling tower; 411. an air outlet; 412. an air inlet; 413. an exhaust fan; 42. a wet bulb thermometer; 43. a circulating water tank; 44. a cooling tube; 441. cooling the water outlet pipe; 442. cooling the water inlet pipe; 45. a shower head; 451. a water pressure sensor; 46. a variable frequency water pump; 47. a first cooling water ball valve; 471. the variable frequency water pump shockproof tapered end; 48. a soft water treatment device; 481. a Y-type filter; 49. a cold water pump; 491. a second cooling water ball valve; 492. the cold water pump shockproof tapered end; 50. a water outlet intersection point; 60. water inlet intersection points; 70. a cold water outlet water temperature sensor; 71. a cold water inlet water temperature sensor; 80. a cold water solenoid valve; 81. a cold water outlet electromagnetic valve; 82. a cold water inlet electromagnetic valve; 90. a cold water two-way valve and an actuator.
Detailed Description
The invention provides an energy-saving air conditioner, which is further described in detail below by referring to the attached drawings and examples in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that the data so used may be interchanged under appropriate circumstances. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such system, article, or apparatus.
Referring to fig. 1, an energy saving type air conditioner includes a refrigeration system 10, a ventilation system 20, and a control system. The refrigerating system 10 comprises an air cooling circulating system 30 and a water cooling circulating system 40; the ventilation system 20 comprises an air conditioner indoor unit 21 and a second heat exchange plate; the control system comprises an air conditioner control module (not marked in the figure), the air conditioner control module comprises a programmable regulator, a temperature transmitter and the like, and the air conditioner control module is in the prior art.
The air-cooling circulation system 30 includes an inverter compressor 31, an oil separator 34, a condenser 32, a first cold water plate heat exchanger 33, and a gas-liquid separator 35. The inverter compressor 31 is electrically connected with the air conditioner control module. The inverter compressor 31 is provided in communication with the condenser 32 through a pipe, and the inverter compressor 31 is used to pipe the coolant into the condenser 32. A fan 321 is provided outside the condenser 32, the fan 321 is disposed opposite to the pipe in the condenser 32, and the fan 321 operates to lower the temperature in the condenser 32 by blowing cool air. An oil separator 34 is arranged between the inverter compressor 31 and the condenser 32 in series, after the inverter compressor 31 is started, the refrigerant is compressed by the compressor to become high-temperature high-pressure gas, the lubricating oil carried by the refrigerant gas is separated by the oil separator 34 and then enters the condenser 32, and the safe and efficient operation of the whole device is ensured.
Referring to fig. 3, the side of the condenser 32 away from the inverter compressor 31 is communicated with a first cold water plate heat exchanger 33 through a pipeline. The first cold plate heat exchanger 33 includes a first inlet 334, a first outlet 333, and a second inlet 335 and a second outlet 336, the first inlet 334 being in communication with the first outlet 333, and the second inlet 335 being in communication with the second outlet 336. The pipeline on the condenser 32 is communicated with a first inlet 334 of the first cold water plate heat exchanger 33, and a first outlet 333 of the first cold water plate heat exchanger 33 is communicated with the variable frequency compressor 31 through the pipeline. A gas-liquid separator 35 is arranged between the first outlet 333 and the inverter compressor 31 in series, a compression solenoid valve 36 is arranged on a pipeline between the gas-liquid separator 35 and the first cold water plate heat exchanger 33, the compression solenoid valve 36 is electrically connected with the air conditioner control module, and the flow rate of refrigerant in the pipeline is controlled through the compression solenoid valve 36.
And a low-pressure sensor 37 is fixedly arranged on a pipeline between the variable-frequency compressor 31 and the gas-liquid separator 35, and the low-pressure sensor 37 is electrically connected with the air conditioner control module. The pressure of the refrigerant in the pipeline is monitored in real time through the low-pressure sensor 37, and stable operation of the equipment is guaranteed. A high-pressure sensor 38 is arranged on a pipeline between the inverter compressor 31 and the oil separator 34, and the high-pressure sensor 38 is electrically connected with the air conditioner control module. The pressure of the refrigerant at the inlet of the inverter compressor 31 is ensured by the low pressure sensor 37 and the high pressure sensor 38.
A second check valve 39 is arranged in series on the pipeline between the condenser 32 and the first cold water plate heat exchanger 33, the flowing direction of the second check valve 39 is that the condenser 32 flows to the first cold water plate heat exchanger 33, and the refrigerant in the pipeline is prevented from flowing back into the condenser 32. A filter 391 is fixed in the pipeline between the second check valve 39 and the first cold water plate heat exchanger 33, and is used for filtering impurities in the refrigerant, reducing the influence of the impurities on the whole equipment, and being beneficial to prolonging the service life of the equipment. An electronic expansion valve 392 is communicated with a pipeline on one side of the filter 391 close to the first cold water plate heat exchanger 33, and the electronic expansion valve 392 is electrically connected with the air conditioner control module.
With reference to fig. 2-3, the ventilation system 20 includes an air conditioner indoor unit 21 and a second cold water plate heat exchanger 22. The installation position of the second cold water plate heat exchanger 22 is at least 1m higher than that of the U-shaped heat pipe evaporator 211 in the vertical direction, a tail end electronic expansion valve 23 is arranged on a pipeline between the U-shaped heat pipe evaporator 211 and the second cold water plate heat exchanger 22, and the tail end electronic expansion valve 23 is electrically connected with the air conditioner control module. The installation position of the second cold water plate heat exchanger 22 is at least 1m higher than the installation position of the U-shaped heat pipe evaporator 211 in the vertical direction, so that the refrigerant between the second cold water plate heat exchanger 22 and the U-shaped heat pipe evaporator 211 sinks into the U-shaped heat pipe evaporator 211 through the self gravity, the refrigerant in the U-shaped heat pipe 213 absorbs heat and becomes gas, the gas generates density difference and flows back to the second cold water plate heat exchanger 22 to absorb heat again with the cold water heat exchanger and becomes liquid refrigerant, and the refrigeration cycle between the air conditioner indoor unit 21 and the second cold water heat exchange plate is completed.
The second cold water plate heat exchanger 22 includes a third inlet 222, a third outlet 221, and a fourth inlet 224 and a fourth outlet 223, the third inlet 222 communicating with the third outlet 221, and the fourth inlet 224 communicating with the fourth outlet 223. The fourth inlet 224 is connected to the second inlet 335 via a pipe, and the fourth outlet 223 is connected to the third outlet 221 via a pipe to form a second heat exchange loop of the first cold water plate heat exchanger 33 and the second cold water plate heat exchanger 22.
With reference to fig. 4-5, the air conditioner internal unit 21 includes a plurality of air conditioner internal units 21, each air conditioner internal unit 21 includes a U-shaped heat pipe evaporator 211 and a blowing fan 212, and the blowing fan 212 is disposed opposite to the U-shaped heat pipe evaporator 211. The U-shaped heat pipe evaporator 211 comprises U-shaped heat pipes 213, the U-shaped heat pipes 213 are arranged in a plurality of groups, the U-shaped heat pipes 213 are arranged in parallel and staggered, pipe orifices at two ends of each U-shaped heat pipe 213 are vertically arranged upwards, and pipe orifices at two ends of each U-shaped heat pipe 213 are respectively communicated with a third inlet 222 and a third outlet 221 of the second cold water plate heat exchanger 22 to form a cold conveying loop. The outlet end of the U-shaped heat pipe 213 is provided with a first check valve 214, the inlet end of the U-shaped heat pipe 213 is provided with an electromagnetic valve 215, and the electromagnetic valve 215 is electrically connected with the air conditioner control module. The U-shaped heat pipes 213 in the U-shaped evaporator are arranged in parallel and staggered, so that the heat exchange area of the U-shaped heat pipes 213 is increased, and meanwhile, the indoor return air can be fully contacted with the outer walls of the U-shaped heat pipes 213, so that the refrigerating capacity of the indoor unit is increased. In addition, the staggered arrangement mode is adopted, the U-shaped heat pipes 213 do not interfere with each other, so that the maintenance is convenient, and when the leakage point condition of a single U-shaped heat pipe 213 occurs, the leakage repairing and maintenance can be directly carried out on the corresponding U-shaped heat pipe 213. The pipe orifices at two ends of the U-shaped heat pipe 213 are respectively communicated with the water inlet and the water outlet of the second cold water plate heat exchanger 22, the outlet end of the U-shaped heat pipe 213 is provided with a first one-way valve 214, and the inlet end of the U-shaped heat pipe 213 is provided with an electromagnetic valve 215. When the cold quantity required by the load equipment is low, the opening degree of the electromagnetic valve 215 is adjusted to control the actually-operated outer wall area of the U-shaped heat pipe 213, so that the cold quantity provided for the load is reduced, the heat dissipated by the second cold water plate heat exchanger 22 is degraded, the flow of the second cold water plate heat exchanger 22 is reduced, the operation energy consumption of the cooling tower 41 or the variable frequency compressor 31 is reduced, the operation energy consumption of the whole air conditioning system is greatly reduced, and the energy is saved.
The water cooling system comprises a cooling tower 41, and a circulating water tank 43 is arranged at the bottom of the cooling tower 41. A cooling pipe 44 is provided on the side wall of the cooling tower 41 in a penetrating manner, and the cooling pipe 44 is provided above the circulating water tank 43. The cooling tower 41 is provided with a spray header 45, the spray header 45 is arranged right above the cooling pipe 44, and the spray header 45 is communicated with the circulating water tank 43 through a pipeline. The top of the cooling tower 41 is provided with an air outlet 411, and the side wall of the cooling tower 41 is provided with an air inlet 412. Air outlet 411 is provided with exhaust fan 413 through the bolt fastening, and exhaust fan 413 is just to air outlet 411 setting for the circulation of air in the cooling tower 41 with higher speed, and exhaust fan 413 and air conditioner control module electric connection. An air cooling area is formed between the air inlet 412 and the air outlet 411, and the cooling pipe 44 is disposed in the air cooling area, that is, the air outlet 411 is opened below the cooling pipe 44. The side wall of the cooling tower 41 is fixedly provided with a wet bulb thermometer 42, the wet bulb thermometer 42 is arranged at the air inlet 412, and the wet bulb thermometer 42 is electrically connected with the air conditioner control module.
A water pressure sensor 451 is arranged on the pipeline close to one side of the spray header 45, and the water pressure sensor 451 is electrically connected with the air-conditioning control module. The water pressure of the spray is generally set to be 3bar in the using process, and the spraying effect is improved by adjusting the spraying amount.
The pipeline between the circulating water tank 43 and the spray header 45 is provided with a variable frequency water pump 46 in series, the variable frequency water pump 46 pumps cooling water in the circulating water tank 43 to the spray header 45, and the cooling water pipe is cooled by spraying through the spray header 45. All be provided with first cooling water ball valve 47 on frequency conversion water pump 46 water delivery side and the intake side pipeline, when the staff overhauld frequency conversion water pump 46, closed first cooling water ball valve 47 earlier, improved the convenience of overhauing frequency conversion water pump 46 greatly. A variable-frequency water pump shockproof tapered end 471 is arranged between the variable-frequency water pump 46 and the first cooling water ball valve 47, and the influence of vibration generated by the working of the variable-frequency water pump 46 on a pipeline is reduced through the variable-frequency water pump shockproof tapered end 471, so that the whole service life of equipment is prolonged. Still establish ties on the pipeline between shower head 45 and the circulation tank 43 and be provided with soft water processing apparatus 48, soft water processing apparatus 48 sets up and is being close to circulation tank 43 one side, effectively avoids cooling water to spray the scale deposit phenomenon to appear on the cooling tube 44 through the soft water processing apparatus 48 that sets up, helps improving the cooling effect of cooling tube 44. The soft water treatment device 48 is provided with a Y-shaped filter 481 on the side close to the first cooling water ball valve 47, so that impurities in the cooling water are further reduced, and the cooling effect of the cooling pipe 44 is improved.
The cooling pipe 44 includes a cooling water outlet pipe 441 and a cooling water inlet pipe 442, the cooling water outlet pipe 441 is communicated with the fourth outlet 223 of the second cold water plate, and the cooling water inlet pipe 442 is communicated with the fourth inlet 224 of the second cold water plate to form a first heat exchange loop between the second cold water plate heat exchanger 22 and the cooling pipe 44. One end of the first cold water plate heat exchanger 33 close to the second cold water plate heat exchanger 22 is provided with a water outlet pipe 331 and a water inlet pipe 332, namely, the water outlet pipe 331 is communicated with the second outlet 336 of the first cold water plate heat exchanger 33, and the water inlet pipe 332 is communicated with the second inlet 335 of the first cold water plate heat exchanger 33. The junction of the water outlet pipe 331 and the cooling water outlet pipe 441 is a water outlet intersection point 50, and the junction of the water inlet pipe and the cooling water inlet pipe 442 is a water inlet intersection point 60. A cold water outlet water temperature sensor 70 is arranged on the cooling water outlet pipe 441, and the cold water outlet water temperature sensor 70 is arranged on the cooling water outlet pipe 441 between the water outlet intersection point 50 and the cooling tower 41. The cooling water inlet pipe 442 is provided with a cold water inlet water temperature sensor 71, the cold water inlet water temperature sensor 71 is arranged on the cooling water inlet pipe 442 between the water inlet intersection point 60 and the cooling tower 41, and the cold water outlet water temperature sensor 70 and the cold water inlet water temperature sensor 71 are electrically connected with the air conditioner control module.
The cooling water inlet pipe 442 is provided with a cold water two-way valve and an actuator 90, the cold water two-way valve and the actuator 90 are arranged between the water inlet intersection point 60 and the second cold water plate heat exchanger 22, and the cold water two-way valve and the actuator 90 are electrically connected with the air conditioner control module.
The cooling water outlet pipe 441 and the cooling water inlet pipe 442 are respectively provided with a cold water electromagnetic valve 80, each cold water electromagnetic valve 80 is respectively arranged between the water outlet intersection point 50 and the cooling tower 41 and between the water inlet intersection point 60 and the cooling tower 41, the water outlet pipe 331 is provided with a cold water outlet electromagnetic valve 81, the cold water outlet electromagnetic valve 81 is arranged between the water outlet intersection point 50 and the first cold water plate heat exchanger 33, the water inlet pipe 332 is provided with a cold water inlet electromagnetic valve 82, the cold water inlet electromagnetic valve 82 is arranged between the water inlet intersection point 60 and the first cold water plate heat exchanger 33, and the cold water electromagnetic valves 80, the cold water outlet electromagnetic valve 81 and the cold water inlet electromagnetic valve 82 are electrically connected with the.
Through the cold water solenoid valve 80, cold water goes out water solenoid valve 81, cold water inlet solenoid valve 82 that set up, when carrying out the air-cooled circulation, go out water solenoid valve 81 with cold water, cold water inlet solenoid valve 82 closes, avoid the refrigerant in the first return circuit to flow into and cause the cold volume loss in the cooling tube 44, when carrying out the water-cooled circulation, close cold water solenoid valve 80, avoid the refrigerant in the second return circuit to flow into and cause the cold volume loss in the first cold water plate heat exchanger 33, thereby the cold volume loss of the air conditioner under different modes that significantly reduces, effectively reduce the energy loss, reduce air conditioner use cost.
A cold water pump 49 for accelerating water circulation is arranged in the heat exchange pipeline of the second cold water plate heat exchanger 22. In this embodiment, the cold water pump 49 is disposed on the cooling water inlet pipe 442, and the cold water pump 49 is disposed between the water inlet intersection 60 and the second cold water plate. Second cooling water ball valves 491 are respectively arranged on the water delivery side and the water inlet side pipelines of the cooling water pump 49, and a cooling water pump shockproof lock head 492 is arranged between the cooling water pump 49 and the second cooling water ball valves 491.
The air conditioner has different working modes in different temperature environments:
under the first working condition, when the wet bulb temperature T is higher than 15 ℃, the variable frequency compressor 31 of the air conditioner is started, and a refrigerant is compressed by the variable frequency compressor 31 to become high-temperature high-pressure gas; the lubricating oil carried by the refrigerant gas is separated by the oil separator 34, and then enters the condenser 32 to be radiated by the fan 321 (i.e., the outdoor unit); after entering the filter 391 through the second one-way valve 39 for filtration, the refrigerant is cooled and depressurized through the electronic expansion valve 392, enters the first cold water plate heat exchanger 33 for heat exchange with cold water, enters the gas-liquid separator 35, and finally enters the compressor to complete a refrigeration cycle.
Working condition two, when wet bulb temperature T when 10 ~ 15 degrees centigrade, open frequency conversion water pump 46 and exhaust fan 413, frequency conversion water pump 46 takes out the water in circulating water tank 43 to the shower head 45 in, atomizes water through shower head 45, realizes atomizing and sprays, carries out cooling treatment to cooling tube 44. At this time, the variable frequency water pump 46 keeps the maximum rotation speed, and simultaneously, the rotation speed of the exhaust fan 413 is adjusted to enable the cold water to reach the inlet temperature of 15 ℃ in the second cold water plate heat exchanger 22.
And under the third working condition, when the wet bulb temperature T is-5-10 ℃, the variable frequency water pump 46 and the exhaust fan 413 are started, the exhaust fan 413 keeps the minimum rotating speed, and meanwhile, the rotating speed of the variable frequency water pump 46 is adjusted to enable cold water to reach the inlet temperature of 15 ℃ in the second cold water plate heat exchanger 22.
And in the fourth working condition, when the wet bulb temperature T is lower than minus 3 ℃, the variable frequency water pump 46 and the exhaust fan 413 are closed, so that the cooling water pipe is cooled by self-heating.
The present invention has the advantages that the operation mode of the system can be selected according to the outdoor wet bulb temperature, and the refrigeration efficiency of the refrigeration system 10 and the reliability of the refrigeration system 10 are improved; meanwhile, when the system runs all the year round, the outdoor cold source is fully utilized when the temperature is lower than a certain temperature, so that the energy is saved, the power consumption is reduced, and the indoor load equipment is cooled.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. An energy-saving air conditioner comprises a refrigerating system (10), a ventilation system (20) and a control system, and is characterized in that the refrigerating system (10) comprises an air cooling circulating system (30) and a water cooling circulating system (40), the air cooling circulating system (30) comprises a variable frequency compressor (31), a condenser (32) and a first cold water plate heat exchanger (33), the variable frequency compressor (31), the condenser (32) and the first cold water plate heat exchanger (33) are sequentially communicated through pipelines, namely the variable frequency compressor (31) conveys a refrigerant to the condenser (32) for refrigeration, then conveys the refrigerated refrigerant to the first cold water plate heat exchanger (33) for realizing refrigerant heat exchange, and finally conveys the refrigerant from the first cold water plate heat exchanger (33) to the variable frequency compressor (31) for completing one air cooling cycle;
the water cooling circulation system (40) comprises a cooling tower (41), a wet bulb thermometer (42) used for detecting the space temperature of the cooling tower (41) is fixedly arranged on the side wall of the cooling tower (41), a circulation water tank (43) is arranged at the bottom of the cooling tower (41), a cooling pipe (44) is arranged on the side wall of the cooling tower (41) in a penetrating mode, the cooling pipe (44) is arranged above the circulation water tank (43), a spray header (45) is arranged in the cooling tower (41), the spray header (45) is arranged right above the cooling pipe (44), the spray header (45) is communicated with the circulation water tank (43) through a pipeline, and a water pumping device used for pumping water in the circulation water tank (43) into the spray header (45) is further arranged on one side of the cooling tower (41);
the ventilation system (20) comprises an air conditioner internal unit (21) and a second cold water plate heat exchanger (22), the air conditioner internal unit (21) is provided with a plurality of air conditioner internal units, each air conditioner internal unit (21) comprises a U-shaped heat pipe (213) evaporator (211) and an air supply fan (212), the air supply fan (212) is arranged right opposite to the U-shaped heat pipe (213) evaporator (211), the U-shaped heat pipe (213) evaporator (211) is communicated with the second cold water plate heat exchanger (22) through a pipeline to form a refrigeration loop, the second cold water plate heat exchanger (22) is communicated with the cooling pipe (44) through a pipeline to form a first heat exchange loop pipeline, and the first cold water plate heat exchanger (33) is communicated with the cooling pipe (44) through an exchange pipe to realize a second heat exchange loop pipeline between the first cold water plate heat exchanger (33) and the second cold water plate heat exchanger (22);
the control system comprises an air conditioner control module, and the variable frequency compressor (31), the wet bulb thermometer (42) and the water pumping device are electrically connected with the air conditioner control module.
2. The energy-saving air conditioner according to claim 1, wherein the cooling pipe (44) comprises a cooling water outlet pipe (441) and a cooling water inlet pipe (442), one end of the first cold water plate heat exchanger (33) close to the second cold water plate heat exchanger (22) is provided with a water outlet pipe (331) and a water inlet pipe (332), a connection position of the water outlet pipe (331) and the cooling water outlet pipe (441) is a water outlet intersection point (50), a connection position of the water inlet pipe (332) and the cooling water inlet pipe (442) is a water inlet intersection point (60), the cooling water outlet pipe (441) is provided with a cold water outlet water temperature sensor (70), the cold water outlet water temperature sensor (70) is arranged on the cooling water outlet pipe (441) between the water outlet intersection point (50) and the cooling tower (41), the cooling water inlet pipe (442) is provided with a cold water inlet water temperature sensor (71), the cold water inlet water temperature sensor (71) is arranged on the cooling water inlet pipe (442) between the water inlet intersection point (60) and the cooling tower (41), and the cold water outlet water temperature sensor (70) and the cold water inlet water temperature sensor (71) are electrically connected with the air conditioner control module.
3. The energy-saving air conditioner according to claim 2, wherein the cooling water outlet pipe (441) and the cooling water inlet pipe (442) are respectively provided with a cold water solenoid valve (80), each cold water solenoid valve (80) is respectively arranged between the water outlet intersection point (50) and the cooling tower (41) and between the water inlet intersection point (60) and the cooling tower (41), a cold water outlet electromagnetic valve (81) is arranged on the water outlet pipe (331), the cold water outlet electromagnetic valve (81) is arranged between the water outlet intersection point (50) and the first cold water plate heat exchanger (33), the water inlet pipe (332) is provided with a cold water inlet electromagnetic valve (82), the cold water inlet electromagnetic valve (82) is arranged between the water inlet intersection point (60) and the first cold water plate heat exchanger (33), the cold water electromagnetic valve (80), the cold water outlet electromagnetic valve (81) and the cold water inlet electromagnetic valve (82) are electrically connected with the air conditioner control module.
4. An energy-saving air conditioner according to claim 1, characterized in that the installation position of the second cold water plate heat exchanger (22) is at least 1m higher than the installation position of the U-shaped heat pipe (213) evaporator (211) in the vertical direction, a terminal electronic expansion valve (23) is arranged on the pipeline between the U-shaped heat pipe (213) evaporator (211) and the second cold water plate heat exchanger (22), and the terminal electronic expansion valve (23) is electrically connected with the air conditioner control module.
5. The energy-saving air conditioner according to claim 4, wherein the U-shaped heat pipe (213) evaporator (211) comprises U-shaped heat pipes (213), the U-shaped heat pipes (213) are provided with a plurality of groups, each U-shaped heat pipe (213) is arranged in parallel and staggered, pipe orifices at two ends of each U-shaped heat pipe (213) are respectively communicated with a water inlet and a water outlet of the second cold water plate heat exchanger (22), the outlet end of each U-shaped heat pipe (213) is provided with a first one-way valve (214), the inlet end of each U-shaped heat pipe (213) is provided with an electromagnetic valve (215), and each electromagnetic valve (215) is electrically connected with the air conditioner control module.
6. The energy-saving air conditioner as claimed in claim 1, wherein an air outlet (411) is formed at the top of the cooling tower (41), an air inlet (412) is formed on the side wall of the cooling tower (41), an air cooling area is formed between the air inlet (412) and the air outlet (411), the air outlet (411) is provided with an exhaust fan (413), the exhaust fan (413) is arranged just opposite to the air outlet (411) and used for accelerating the air circulation in the cooling tower (41), and the air outlet (411) is arranged below the cooling pipe (44), namely, the cooling pipe (44) is arranged in the air cooling area, and the exhaust fan (413) is electrically connected with the air conditioning control module.
7. The energy-saving air conditioner according to claim 1, wherein the water pumping device is a variable frequency water pump (46), the variable frequency water pump (46) is arranged in a pipeline between the circulating water tank (43) and the spray header (45), the pipelines on the water delivery side and the water inlet side of the variable frequency water pump (46) are provided with first cooling water ball valves (47), and a cold water pump (49) shockproof tapered end is arranged between the variable frequency water pump (46) and the first cooling water ball valves (47).
8. An energy-saving air conditioner according to claim 1, characterized in that a soft water treatment device (48) is provided in series on the pipe between the shower head (45) and the circulation tank (43).
9. The energy-saving air conditioner according to claim 1, wherein a cold water pump (49) for accelerating water circulation is arranged in the heat exchange pipeline of the second cold water plate heat exchanger (22), second cooling water ball valves (491) are arranged on the pipelines on the water delivery side and the water inlet side of the cold water pump (49), and a cold water pump (49) shockproof tapered end is arranged between the cold water pump (49) and the second cooling water ball valves (491).
10. An energy-saving air conditioner according to claim 1, characterized in that an oil separator (34) is arranged in series between the inverter compressor (31) and the condenser (32), and a gas-liquid separator (35) is arranged in series between the inverter compressor (31) and the first cold water plate heat exchanger (33).
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