CN201237404Y

CN201237404Y - Trans-critical CO2/R22 heat pump air conditioner and hot water triple supplying system

Info

Publication number: CN201237404Y
Application number: CNU2008201505111U
Authority: CN
Inventors: 吕静; 王伟峰; 周传煜
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2008-07-03
Filing date: 2008-07-03
Publication date: 2009-05-13
Anticipated expiration: 2018-07-03

Abstract

The utility model belongs to the technical field of combined use of indoor air conditioners and hot water circulation. The transcritical CO ₂ /R22 heat pump air conditioner and hot water triple supply system mentioned in the utility model is connected with the transcritical carbon dioxide heat pump system and the R22 air conditioner and refrigeration system respectively through the A three-way valve and the B three-way valve, and then connected with the water pump. The hot water storage tank realizes the switching between the two systems, and realizes three operation modes by combining the transcritical _CO2 heat pump circulation system, the R22 air conditioning circulation system and the hot water circulation. The utility model combines the strengths of two independent systems to make up for the deficiencies of the respective systems. It can not only meet the demand for cooling in summer and hot water supply in various periods throughout the year, but also meet the needs for heating and hot water supply in winter. It has great advantages in environmental protection, and its potential for energy saving is very large. At the same time, the system is compact in structure and improves the utilization rate of equipment.

Description

Stride critical CO 2/ R22 heat pump air conditioner and hot water tri-generation system

Technical field

The utility model belongs to technical field of air-conditioning heat pumps, is a kind ofly to relate to conventional cold-producing medium (R22) kind of refrigeration cycle and stride critical CO ₂The cooperation method of heat pump cycle.

Background technology

Because environmental problems such as global air temperature warming, unusual weather conditions are serious day by day, environmental protection and the energy-conservation great and urgent subject of of present whole international community that becomes.

A large amount of at present freon family formula heat pump type air conditioning systems that use, summer, the thermal discharge of outdoor condenser was big, and the high more refrigerating efficiency of outside air temperature is low more, and energy consumption is high more; Northerly transition season or southern winter, when outside air temperature was lower, heat pump heat supply efficient was very low, needed to increase auxiliary electric heater unit and satisfied the demands, and energy consumption also increases greatly; In addition along with the raising of people's living standard, the demand of family life hot water is also increasing, its required energy consumption accounts for about 30% of family's total energy consumption, general employing electrical heating or combustion gas heating make hot water, air-conditioning system and hot water supply system are set up separately, utilization rate of equipment and installations is low, the cost height.If heat pump air conditioner and hot-water supply system can be united two into one, both can improve equipment utilization rate, can realize environmental protection, energy-conservation effect again.

The R22 air-conditioning system is usually used in the refrigeration in summer, its refrigerating efficiency height, energy consumption is low, invest little, easy for installation, to advantages such as the influence of surrounding environment are little, make it become one of device that is most widely used in the current domestic air conditioning market, obtained in traditional non-heating regions such as the middle and lower reach of Yangtze River, south China and southwest of China using widely.When but the heat pump cycle of this system heats in the winter time from atmospheric environment draw heat, the outdoor heat exchanger surface can frosting under the weather condition of, high humidity low at outside air temperature, cause heat pump performance to descend, the heating capacity deficiency, heating efficiency is low and problem such as delivery temperature height, also can cause the heat pump cisco unity malfunction when serious.Be the heat pump cycle that solves this system application problem at cold district, except adopting the method for auxiliary thermal source, lot of domestic and international scholar studies, and from different aspects, improved the adaptability of air source heat pump at cold district to some extent, but does not solve the problem that exists fully.

Carbon dioxide is comparatively desirable cold-producing medium as a kind of natural material, and that its advantage is is nontoxic, do not fire, the ODP value is zero, greenhouse effects are less, cheap, need not reclaim, environment is free from side effects etc.Since 1866, to the thirties in 20th century, carbon dioxide sub critical circulation once was widely used, but because its efficient is lower, system works pressure height, and reasons such as plant machinery requirement of strength height are replaced by afterwards freon system.

The exothermic process temperature of critical-cross carbon dioxide circulation is higher, and has a sizable temperature glide (about 80～100 ℃), is used for heat pump cycle and has special advantages.Studies show that under the same operating mode, (1) is heated to 60 ℃, CO with water from 10 ℃ ₂Teat pump boiler is than electric heater and gas heater energy-conservation 75%; (2) CO ₂Teat pump boiler can be produced the hot water that temperature reaches 90 ℃, and the hot water temperature of conventional heat pump system generally is lower than 55 ℃; (3) adopting carbon dioxide heat-pump is commercial and residential housing hot-water supply, can make it always reduce 20% with energy; (4) CO ₂Heat pump can be kept higher heating load under low temperature environment, save the auxiliary spent energy of firing equipment greatly.

The utility model content

The purpose of this utility model be exactly with heat pump air conditioner and water heater in conjunction with forming a system, form one and stride critical CO ₂/ R22 heat pump air conditioner and hot water tri-generation system, performance R22 system aspect refrigeration high efficiency and stride critical CO ₂The unique advantage of system aspect heating.

What is called is striden critical CO ₂Circulation is meant CO ₂Between subcritical and super critical condition, move, in the evaporimeter of subcritical pressure, absorb heat, and the circulation of heat release in the gas cooler of supercritical pressure.

For achieving the above object, the concrete technical scheme taked of the utility model is as follows:

A kind ofly stride critical CO ₂/ R22 heat pump air conditioner and hot water tri-generation system, this is system combined strides critical CO ₂Heat pump circulating system, R22 air conditioner circulating system and three kinds of operational modes of hot water cyclesystem,

Wherein CO 2 trans-critical heat pump circulatory system composition is: A hot water heat exchanger (11) in parallel and room air heat exchanger (7), A choke valve (12), outdoor air heat exchanger (5), reservoir (13) and carbon-dioxide gas compressor (8) constitute the CO 2 trans-critical heat pump circulation line by the pipeline series connection;

The composition of R22 air conditioner cooling cycle system is: B hot water heat exchanger (4) in parallel and outdoor air heat exchanger (5), R22 compressor (1), room air heat exchanger (7) and B choke valve (6) constitute R22 air conditioner refrigerating circulation line by the pipeline series connection;

The composition of hot water cyclesystem is: A triple valve (17) links to each other with the A hot water heat exchanger (11) of CO 2 trans-critical heat pump system and the B hot water heat exchanger (4) of R22 air-conditioning refrigeration system respectively with B triple valve (18), switch between two systems by these two triple valves, pass through water pump (15) again and connect hot water storage tank (14).

R22 air-conditioning system and stride critical CO ₂The shared outdoor heat exchanger of heat pump, and link to each other with hot-water heating system by hot water heat exchanger respectively.Realize CO by monitoring outdoor temperature, humidity ₂The automatic switchover of system and R22 system also can adopt manual mode to come control system.Five kinds of operational modes can be provided: refrigeration+heat supply water, heat+heat supply water, separate refrigeration, heat separately, independent heat supply water, satisfying different weather conditions and user's different needs, is a kind ofly to collect energy-saving and environmental protection, compactness, efficiently be the heat supply of one, air-conditioning and hot water joint supply system.

In sum, native system will be striden critical CO ₂Heat pump and R22 air-conditioning system associating has been given full play to the low advantage of R22 air-conditioning system refrigerating efficiency height, energy consumption and has been striden critical CO ₂The unique advantage of heat pump cycle aspect heating, the length that combines two autonomous systems remedies the deficiency of system separately.Can satisfy the refrigeration and the heat supply water demand in annual each period in summer, can satisfy the heating in winter and the demand of heat supply water again, not only aspect environmental protection, have very big advantage, and its energy-conservation potentiality be very big.This system integrates heat pump air conditioner and hot-water supply system, system architecture compactness not only, also improved equipment utilization rate.

Description of drawings

Fig. 1 is for striding critical CO ₂The structure principle chart of/R22 heat pump air conditioner and hot water tri-generation system.The name of each critical piece is called among Fig. 1: the 1-R22 compressor; 2,3,9,10,16-valve; 4,11-hot water heat exchanger; The 5-outdoor air heat exchanger; 6,12-choke valve; 7-room air heat exchanger; The 8-CO2 compressor; The 13-reservoir; The 14-boiler; The 15-water pump; 17,18-triple valve.

Fig. 2 is the operation logic figure of R22 air conditioner refrigerating+hot-water supply system, and it realizes refrigeration and heat supply water by the R22 circulatory system (R22 compressor 1,

valve

2 or 3 are opened,

heat exchanger

4 or 5, choke valve 6, indoor heat exchanger 7) and hot-water heating system (boiler 14, valve 18a-c connection, heat exchanger 5, valve 17a-c connection, valve 16, water pump 15).

Fig. 3 is for striding critical CO ₂Heat pump heats+the operation logic figure of hot-water supply system, and it is by striding critical CO ₂Heat pump cycle (CO ₂Compressor 8,

valve

9 or 10 are opened, choke valve 12, heat exchanger 5, indoor heat exchanger, reservoir 13) and hot-water heating system (boiler 14, valve 18a-b connection, heat exchanger 11, valve 17a-b connection, valve 16, water pump 15) realize heating with heat supply water.

The specific embodiment

Further specify the specific embodiment of the present utility model below in conjunction with accompanying drawing 1:

As shown in Figure 1, of the present utility modelly stride critical CO ₂/ R22 heat pump air conditioner and hot water tri-generation system are united and are striden critical CO ₂Heat pump circulating system, R22 air conditioner circulating system and hot water cyclesystem realize three kinds of operational modes.

Native system comprises strides critical CO ₂Heat pump circulating system, the R22 heat pump air conditioner circulatory system and hot water cyclesystem.Can be according to different weather conditions and user's different needs, realize freezing, heat, three kinds of functions of heat supply water.There are 5 kinds of mode of operations in this system, is respectively: 1) refrigeration+heat supply water condition; 2) heat+the heat supply water condition; 3) separate refrigeration operating mode; 4) independent heating condition; 5) independent heat supply water condition.Introduced respectively below in conjunction with Fig. 1, Fig. 2, Fig. 3:

1) refrigeration+heat supply water condition

Open R22 system (valve 2 is connected), CO ₂System is in closed condition (valve 9 and valve 10 are closed), opens hot-water heating system (valve 16, valve 18a-c connect and valve 17a-c connects).

Open the R22 circulatory system, be that working medium is connected, finished circulation through heat exchanger 4, choke valve 6 and indoor heat exchanger 7 through R22 compressor 1, valve 2, hot water is from boiler 14, through valve 18a-c connection, through heat exchanger 4, valve 17a-c connection, valve 16, water pump 15, get back to the circulation of finishing hot water in the water tank, thereby realized the function of refrigeration and heat supply water.

Under the summer condition, the cold that the R22 circulatory system produces is sent to indoor by room air heat exchanger 7, and the heat extraction in the R22 circulatory system is heat hot water in hot water heat exchanger 4, has realized the recovery of waste heat, has improved the efficient of circulation; When the water temperature in the water tank reached the temperature of setting, valve 2 cut out, and valve 3 is connected, and the heat extraction of system is discharged in the atmosphere by outdoor air heat exchanger 5; Operation logic as shown in Figure 2.

2) heat+the heat supply water condition

Open CO ₂System's (valve 9 and valve 10 are connected), the R22 system is in closed condition (valve 2 and valve 3 are closed), opens hot-water heating system (valve 16 is connected, valve 18a-b connects and valve 17a-b connects).

CO ₂System is a transcritical operation, and the exothermic process temperature glide is very big, and thermal discharge is very big, this heat part is used for hot water heat exchanger 11 heat hot water, another part is used for room air heat exchanger 7 and carries out heat exchange with air, and heat transferred is indoor, reaches the purpose of heating.

Under the winter condition, open CO ₂The circulatory system, working medium is through CO ₂Compressor 8, valve 9 and valve 10 are connected, are finished circulation, CO through indoor heat exchanger 7 and hot water heat exchanger 11, choke valve 12 and outdoor heat exchanger 5 ₂The heat part that the circulatory system produces is sent to indoor by room air heat exchanger 7, realize heat supply; Another part is heat hot water in hot water heat exchanger 11.Hot water is got back to the circulation of finishing hot water in the water tank, thereby has been realized the function of heat supply water from boiler 14, through valve 18a-b connection, through heat exchanger 11, valve 17a-b connection, valve 16, water pump 15.Operation logic as shown in Figure 3.

3) separate refrigeration operating mode

Open R22 system (valve 2 is connected) separately, CO ₂System is in closed condition (valve 9 and valve 10 are closed), and hot-water heating system is closed (valve 16 cuts out).

Open the R22 circulatory system, promptly working medium is connected, is finished circulation through heat exchanger 5, choke valve 6 and indoor heat exchanger 7 through R22 compressor 1, valve 3.The condensation heat of system all is discharged to atmosphere by outdoor air heat exchanger 5.This moment, the running status of system was exactly the refrigerating state of the most general current domestic air conditioning.At this moment outdoor air heat exchanger 5 is exactly the condenser of system.

4) independent heating condition

Only open CO separately ₂System, R22 system and hot-water heating system are in closed condition.

Open CO ₂System's (valve 10 is connected), the R22 system is in closed condition (valve 2 and valve 3 are closed), opens hot-water heating system (valve 16 cuts out).Working medium is through CO ₂Compressor 8, valve 10 are connected, are finished circulation, CO through heat exchanger 7, choke valve 12 and outdoor heat exchanger 5 ₂The heat that the circulatory system produces is sent to indoor by room air heat exchanger 7, realize heat supply.

This moment CO ₂The heat extraction that system produces is all carried out heat exchange with air in room air heat exchanger 7, heat transferred is indoor.At this moment outdoor air heat exchanger 5 is exactly the evaporimeter of system.

5) independent heat supply water condition

Open CO ₂System's (valve 9 is connected) and hot-water heating system are opened hot-water heating system (valve 16 is connected, valve 18a-b connects and valve 17a-b connects), and the R22 system is in closed condition (valve 2 and valve 3 are closed).

Valve 9 is connected CO ₂The circulatory system is drawn the heat of environment, heat hot water in heat exchanger 11 from outdoor heat exchanger 5.Hot water is got back to the circulation of finishing hot water in the water tank, thereby has been realized the function of heat supply water from boiler 14, through valve 18a-b connection, through heat exchanger 11, valve 17a-b connection, valve 16, water pump 15.

This moment, this system was equivalent to CO ₂Teat pump boiler, CO ₂The heat extraction of system all is used for heat hot water, and this process realizes in hot water heat exchanger 11.At this moment outdoor air heat exchanger 5 is exactly the evaporimeter of system.

Claims

1. A transcritical CO ₂ /R22 heat pump air conditioning and hot water triple supply system, characterized in that the system combines a transcritical CO ₂ heat pump circulation system, an R22 air conditioning circulation system and a hot water circulation system to achieve three operating modes

The transcritical carbon dioxide heat pump circulation system is composed of: parallel A hot water heat exchanger (11) and indoor air heat exchanger (7), A throttle valve (12), outdoor air heat exchanger (5), liquid storage The device (13) and the carbon dioxide compressor (8) are connected in series through pipelines to form a transcritical carbon dioxide heat pump circulation pipeline;

The composition of the R22 air conditioning refrigeration cycle system is: parallel B hot water heat exchanger (4) and outdoor air heat exchanger (5), R22 compressor (1), indoor air heat exchanger (7) and B throttle valve (6) Connect the pipes in series to form the R22 air-conditioning refrigeration cycle pipeline;

The composition of the hot water circulation system is: A three-way valve (17) and B three-way valve (18) respectively exchange with the A hot water heat exchanger (11) of the transcritical carbon dioxide heat pump system and the B hot water of the R22 air-conditioning and refrigeration system. The heater (4) is connected, and the two systems are switched through the two three-way valves, and then connected to the heat storage tank (14) through the water pump (15).

2. The transcritical CO ₂ /R22 heat pump air conditioner and hot water triple supply system as claimed in claim 1, characterized in that, in the cooling + hot water supply mode: the R22 air conditioner refrigeration circulation system is turned on, and the transcritical carbon dioxide heat pump circulation system Close, valves 18a-c are on and valves 17a-c are on, hot water circulation system is on.

3. The transcritical CO ₂ /R22 heat pump air conditioner and hot water triple supply system as claimed in claim 1, characterized in that, in the heating + hot water supply mode: the transcritical carbon dioxide heat pump cycle system is closed, and the R22 air conditioner refrigeration cycle The system is closed, the B three-way valve ab is connected and the A three-way valve ab is connected, and the hot water circulation system is opened.

4. The transcritical CO ₂ /R22 heat pump air conditioner and hot water triple supply system as claimed in claim 1, characterized in that, in the single cooling condition: the R22 air conditioner refrigeration cycle system is turned on, the transcritical carbon dioxide heat pump cycle system is turned off, and the thermal The water system is shut off.

5. The transcritical CO ₂ /R22 heat pump air-conditioning and hot water triple supply system as claimed in claim 1, characterized in that, in the single heating condition: the R22 air-conditioning refrigeration cycle system is turned off, and the transcritical carbon dioxide heat pump cycle system is turned on, The hot water system is off.

6. The transcritical CO ₂ /R22 heat pump air conditioner and hot water triple supply system as claimed in claim 1, characterized in that, in the single hot water supply condition: the R22 air conditioner refrigeration cycle system is turned off, and the transcritical carbon dioxide heat pump cycle system is turned on , B three-way valve ab is connected and A three-way valve ab is connected, and the hot water system is turned on.