CN105423617A - Air source flexible water chiller-heater unit and operation method - Google Patents

Abstract

The invention discloses an air source flexible water chiller-heater unit and an operation method and belongs to the field of heating and air conditioning. Existing water-cooled air source water chiller-heater units can effectively achieve the cooling function in summer but cannot achieve the heating function in winter. Existing direct air-cooled air source water chiller-heater units are high in condensing temperature in summer, and the heating effect is not as good as a water-cooled system, besides, the phenomenon that outdoor heat exchangers frost in winter exists, and existing defrosting methods influence the stable heat supply to users. According to the air source flexible water chiller-heater unit, at least one outdoor evaporation-cooled heat exchanging unit and at least two outdoor air-cooled heat exchanging units are connected in parallel and connected to the water chiller-heater unit. In summer, the water chiller-heater unit exhausts heat to outdoor air through the evaporation-cooled heat exchanging unit to reduce the condensing temperature, and the energy efficiency of the water chiller-heater unit is improved. In winter, the water chiller-heater unit absorbs heat from the outdoor air through the outdoor air-cooled heat exchanging units, and hot water produced through the water chiller-heater unit is led to the specified outdoor air-cooled heat exchanging units during defrosting, and heat is supplied to the users continuously and stably under the defrosting work condition.

Description

An air source flexible cold and hot water unit and its operation method

technical field

The invention relates to an air source flexible cold and hot water unit and an operation method thereof, belonging to the field of heating and air conditioning.

Background technique

The air source cold and hot water unit is a kind of high-efficiency cooling and heating equipment. It takes heat from the outdoor air and supplies heat to the room in winter, and releases heat to the outside air and supplies cooling to the room in summer, so as to meet the building's air conditioning and hot water requirements. need. According to the different cooling methods on the outdoor side, the air source cold and hot water units are mainly divided into direct air-cooled and water-cooled.

The direct air-cooled hot and cold water system has the advantages of convenient installation, wide application range, and small footprint. Such systems use air-cooled heat exchangers to dissipate heat to the ambient air in summer, and the outdoor air acquires sensible heat and warms up. Direct air-cooled systems typically have a higher condensing temperature than water-cooled systems, which in turn degrades the performance of the chiller in cooling duty.

The direct air-cooled hot and cold water system draws heat from the outdoor air in winter. There is a problem of frosting in practical applications, especially in areas with low temperature and high humidity. The frosting phenomenon of the outdoor air-cooled heat exchanger Especially serious. There are three existing defrosting schemes: refrigerant reverse defrosting, thermal storage defrosting and residual heat defrosting. The first two solutions will completely or partially affect the heating effect on the user side during the defrosting process. Although the waste heat defrosting will not affect the indoor heating effect, it will reduce the primary energy efficiency of the unit and fail to achieve the purpose of energy conservation and environmental protection.

In the summer cooling condition of the water-cooled system, the heat release end of the chiller and hot water unit releases heat to the cooling water, and then the cooling water is passed into the cooling tower to release heat to the ambient air. Since the temperature of the cooling water produced by the water-cooled system is usually lower than the condensation temperature of the air-cooled heat exchanger, the performance of the water-cooled system is better than that of the direct air-cooled system in summer cooling conditions.

In winter heating conditions, ordinary cooling towers cannot extract heat from the ambient air, and there is no suitable low-grade heat source to ensure the normal operation of the multi-connected air-conditioning heat pump system. The Chinese patent (authorized notification number CN203934451U) proposes a method of using solution to spray air to build an energy tower as a heat pump multi-line heat extraction system. Although the cooling water antifreeze problem is solved, there are still insufficient heat extraction, high solution cost, and regeneration energy consumption. advanced questions.

Therefore, it is an important way to further develop and improve the performance of air source chillers to develop air source chillers with the characteristics of efficient cooling, continuous and stable heating, and reliable operation.

Contents of the invention

Based on the above background, the object of the present invention is to propose an air source flexible cold and hot water unit and its operation method. The system can not only use the evaporative cooling method for high-efficiency cooling in summer, but also use the outdoor air-cooled heat exchanger for heating in winter, and the normal heating will not be affected under the defrosting condition, which improves the energy utilization efficiency and heating supply of the air source unit. reliability.

Technical scheme of the present invention is as follows:

An air source flexible cold and hot water unit, including three parts: an outdoor unit, a cold and hot water unit, and a user; unit, at least two outdoor air-cooled heat exchange units, and a first liquid pump, a second liquid pump, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, and a seventh valve and the eighth valve; each evaporative cooling heat exchange unit includes a cooling tower, the ninth valve located in the outlet pipeline of the cooling tower and the tenth valve located in the inlet pipeline of the cooling tower; each outdoor air-cooled heat exchange unit includes an outdoor air-cooled Heat exchanger, the eleventh valve, the twelfth valve, the thirteenth valve and the fourteenth valve; one end of the eleventh valve and the thirteenth valve is connected to the outlet of the outdoor air-cooled heat exchanger, and the twelfth valve One end of the fourteenth valve is connected to the inlet of the outdoor air-cooled heat exchanger; the outlet of each cooling tower and the outlet of each outdoor air-cooled heat exchanger are connected in parallel through the ninth valve and the eleventh valve respectively, and then pass through in sequence The first liquid pump and the second valve are connected to the inlet of the heat-absorbing module, the inlet of each cooling tower and the inlet of each outdoor air-cooled heat exchanger are respectively connected in parallel through the tenth valve and the twelfth valve, and then pass through the sixth valve and the The outlet of the heat-absorbing module is connected; the outlet of each outdoor air-cooled heat exchanger is connected to the inlet of the exothermic module through the thirteenth valve, the second liquid pump and the third valve in turn, and the inlet of each outdoor air-cooled heat exchanger The outlet of the exothermic module is connected through the fourteenth valve and the seventh valve in sequence; the user is connected between the inlet of the second liquid pump and the outlet of the seventh valve, and between the outlet of the first liquid pump and the outlet of the third valve A pipeline and a first valve are provided, a pipeline and a fourth valve are provided between the outlet of the second liquid pump and the outlet of the second valve, and a pipeline and a valve are provided between the outlet of the sixth valve and the inlet of the seventh valve. A pipeline and an eighth valve are arranged between the fifth valve, the inlet of the sixth valve and the outlet of the seventh valve.

The air source flexible chiller and hot water unit of the present invention is characterized in that: the chiller and hot water unit is a vapor compression chiller or absorption chiller.

The operating method of the air source flexible chiller and hot water unit according to the present invention is characterized in that the operating method includes the following three operating modes:

a. Heating mode: When the system is running in the heating mode, open the eleventh valve and the twelfth valve in all or part of the outdoor air-cooled heat exchange unit, open the second valve, the third valve, the sixth valve and the The seventh valve, close the remaining valves in the outdoor air-cooled heat exchange unit, all valves in the evaporative cooling heat exchange unit, the first valve, the fourth valve, the fifth valve and the eighth valve, run the first liquid pump, the second Liquid pumps and hot and cold water units, water or solution enters the open outdoor air-cooled heat exchange unit driven by the first liquid pump and absorbs heat from the environment, and then releases heat in the heat absorption module of the cold and hot water units, continuously circulating ; Another stream of water through the solution absorbs heat from the heat release module of the cold and hot water unit under the drive of the second liquid pump, releases heat at the user, and supplies heat to the user;

b. Heating defrosting mode: When the system is running in heating defrosting mode, open all or part of the eleventh valve and the twelfth valve in the outdoor air-cooled heat exchange unit that is not frosted, open all or part of the The thirteenth valve and the fourteenth valve in the outdoor air-cooled heat exchange unit for defrosting, open the second valve, the third valve, the sixth valve and the seventh valve, and close the remaining valves in the outdoor air-cooled heat exchange unit, All the valves, the first valve, the fourth valve, the fifth valve and the eighth valve in the evaporative cooling and heat exchange unit, run the first liquid pump, the second liquid pump and the hot and cold water unit; water or solution in the first liquid pump Driven by the drive, it enters the open non-frosted outdoor air-cooled heat exchange unit to absorb the ambient heat, and then releases heat in the heat-absorbing module of the hot and cold water unit, and circulates continuously; another stream of water or solution is driven by the second liquid pump The bottom is divided into two paths, one path enters the frosted outdoor air-cooled heat exchange unit to release heat and defrost, the other path enters the user to release heat to supply heat to the user, and then the two paths merge and enter the heat release module of the hot and cold water unit to absorb heat, continuously cycle;

c. Cooling mode: When the system is running in the cooling mode, open the ninth valve and the tenth valve in all or part of the evaporative cooling heat exchange unit, open the first valve, the fourth valve, the fifth valve and the eighth valve , close the valves in the other evaporative cooling and heat exchange units, all the valves in the outdoor air-cooled heat exchange unit, the second valve, the third valve, the sixth valve and the seventh valve, and run the first liquid pump, the second liquid pump and Cold and hot water unit; water or solution enters the evaporative cooling heat exchange unit to release heat driven by the first liquid pump, and then enters the cold and hot water unit to absorb heat and circulate continuously, and the other water or solution is driven by the second liquid pump It enters the cold and hot water unit to release heat, then enters the user to absorb heat, and supplies cooling to the user.

Compared with the traditional air source cold and hot water unit, the present invention has the following outstanding advantages and remarkable technical effects:

①Compared with the direct air-cooled air source chiller and hot water unit, during cooling in summer, the evaporative cooling method is used to cool the cooling medium, so that the chiller and hot water unit have higher cooling efficiency and more energy saving;

②Compared with the water-cooled air source chiller and hot water unit, it can realize the heating function in winter. Compared with the air source cold and hot water unit using the energy tower, the solution regeneration link is omitted, and the problems of high solution cost and high regeneration energy consumption are avoided;

③Compared with the direct air-cooled air source chiller and hot water unit, when defrosting is required for heating in winter, the hot water produced by the heat pump is used to defrost the outdoor air-cooled heat exchanger alternately, and stable supply can still be provided to users at this time. heat, improving the reliability of heating and indoor comfort.

In general, the present invention provides a cooling and hot water unit with high cooling efficiency, continuous heating and reliable system operation, which plays an important role in solving the heating problem of air source cooling and hot water units in winter and reducing energy consumption.

Description of drawings

Fig. 1 is a schematic structural diagram of an air source flexible chiller and hot water unit disclosed by the present invention.

Fig. 2 is a structural schematic diagram of a vapor compression type air source flexible chiller and hot water unit in the present invention.

Fig. 3 is a schematic diagram of the operating heating mode of the vapor compression air source flexible chiller and hot water unit in the present invention.

Fig. 4 is a schematic diagram of the heating and defrosting mode of the vapor compression air source flexible chiller and hot water unit in the present invention.

Fig. 5 is a schematic diagram of the cooling mode of the vapor compression air source flexible chiller and hot water unit in the present invention.

Fig. 6 is a schematic structural diagram of an absorption air source flexible chiller and hot water unit in the present invention.

Fig. 7 is a schematic diagram of the operation and heating mode of the absorption air source flexible chiller and hot water unit in the present invention.

Fig. 8 is a schematic diagram of the heating and defrosting mode of the absorption air source flexible chiller and hot water unit in the present invention.

Fig. 9 is a schematic diagram of the cooling mode of the absorption air source flexible chiller and hot water unit in the present invention.

The names of the components marked in Figure 1 are as follows: 10-evaporative heat exchange unit; 11-cooling tower; 12-ninth valve; 13-tenth valve; 20-outdoor air-cooled heat exchange unit; 21-outdoor air-cooled heat exchange 22-the eleventh valve; 23-the twelfth valve; 24-the thirteenth valve; 25-the fourteenth valve; 30-the hot and cold water unit; 31-the heat-absorbing module; -user; 501-first liquid pump; 502-second liquid pump; 503-first valve; 504-second valve; 505-third valve; 506-fourth valve; 507-fifth valve; 508-th Six valves; 509-the seventh valve; 510-the eighth valve.

The names of the components marked in Figure 2-Figure 5 are as follows: 10-evaporative cooling and heat exchange unit; 11-cooling tower; 12-ninth valve; 13-tenth valve; 20-outdoor air-cooled heat exchange unit; 21-outdoor wind Cold heat exchanger; 22-eleventh valve; 23-twelfth valve; 24-thirteenth valve; 25-fourteenth valve; 30-vapor compression hot and cold water unit; 31a-evaporator; 32a- Condenser; 33-compressor; 34-throttle valve; 40-user; 501-first liquid pump; 502-second liquid pump; 503-first valve; 504-second valve; 505-third valve; 506-the fourth valve; 507-the fifth valve; 508-the sixth valve; 509-the seventh valve; 510-the eighth valve.

The names of the components marked in Figure 6-Figure 9 are as follows: 10-evaporative cooling heat exchange unit; 11-cooling tower; 12-ninth valve; 13-tenth valve; 20-outdoor air-cooled heat exchange unit; 21-outdoor wind Cold heat exchanger; 22-eleventh valve; 23-twelfth valve; 24-thirteenth valve; 25-fourteenth valve; 30-absorption cold and hot water unit; 31b-evaporator; 32b-absorption 32c-condenser; 35-generator; 36-solution heat exchanger; 37-first throttle valve; 38-second throttle valve; 39-solution pump; 40-user; 501-first liquid pump ;502-the second liquid pump; 503-the first valve; 504-the second valve; 505-the third valve; 506-the fourth valve; 507-the fifth valve; 508-the sixth valve; 509-the seventh valve; 510 - Eighth valve.

detailed description

Structure, principle and mode of operation of the present invention are further elaborated below in conjunction with accompanying drawing:

Fig. 1 is a schematic structural diagram of an air source flexible chiller and hot water unit disclosed by the present invention. The air source flexible cold and hot water unit of the present invention includes three parts: an outdoor unit, a cold and hot water unit 30 and a user 40; At least one evaporative cooling heat exchange unit 10, at least two outdoor air-cooled heat exchange units 20, and the first liquid pump 501, the second liquid pump 502, the first valve 503, the second valve 504, the third valve 505, the fourth Valve 506, fifth valve 507, sixth valve 508, seventh valve 509 and eighth valve 510; each evaporative cooling heat exchange unit 10 includes a cooling tower 11, a ninth valve 12 located in the outlet pipeline of the cooling tower 11 and a valve located in The tenth valve 13 of the inlet pipeline of the cooling tower 11; each outdoor air-cooled heat exchange unit 20 includes an outdoor air-cooled heat exchanger 21, an eleventh valve 22, a twelfth valve 23, a thirteenth valve 24 and a tenth valve Four valves 25; one end of the eleventh valve 22 and the thirteenth valve 24 is connected with the outlet of the outdoor air-cooled heat exchanger 21, and one end of the twelfth valve 23 and the fourteenth valve 25 is connected with the outlet of the outdoor air-cooled heat exchanger 21 The outlet of each cooling tower 11 and the outlet of each outdoor air-cooled heat exchanger 21 are respectively connected in parallel through the ninth valve 12 and the eleventh valve 22, and then pass through the first liquid pump 501 and the second valve 504 in sequence Connected to the inlet of the heat absorption module 31, the inlet of each cooling tower 11 and the inlet of each outdoor air-cooled heat exchanger 21 are respectively connected in parallel through the tenth valve 13 and the twelfth valve 23, and then pass through the sixth valve 508 and the heat absorption The outlet of the module 31 is connected; the outlet of each outdoor air-cooled heat exchanger 21 is connected to the inlet of the heat release module 32 through the thirteenth valve 24, the second liquid pump 502 and the third valve 505 in turn, and each outdoor air-cooled heat exchanger The inlet of the heater 21 is connected to the outlet of the exothermic module 32 through the fourteenth valve 25 and the seventh valve 509 in sequence; the user 40 is connected between the inlet of the second liquid pump 502 and the outlet of the seventh valve 509, and the first liquid A pipeline and a first valve 503 are provided between the outlet of the pump 501 and the outlet of the third valve 505, and a pipeline and a fourth valve 506 are provided between the outlet of the second liquid pump 502 and the outlet of the second valve 504. A pipeline and the fifth valve 507 are provided between the outlet of the sixth valve 508 and the inlet of the seventh valve 509 , and a pipeline and the eighth valve 510 are provided between the inlet of the sixth valve 508 and the outlet of the seventh valve 509 . The air source flexible chiller unit 30 of the present invention is a vapor compression chiller unit or an absorption chiller unit.

Fig. 2 is a structural schematic diagram of a vapor compression type air source flexible chiller and hot water unit in the present invention. The air source flexible cold and hot water unit of the present invention includes three parts: an outdoor unit, a vapor compression cold and hot water unit 30 and a user 40; the vapor compression cold and hot water unit 30 includes an evaporator 31a, a condenser 32a, Compressor 33 and throttle valve 34; evaporator 31a, compressor 33, condenser 32a and throttle valve 34 are connected in sequence to form a circuit; it is characterized in that: the outdoor unit includes at least one evaporative cold heat exchange unit 10, at least two Outdoor air-cooled heat exchange unit 20, first liquid pump 501, second liquid pump 502, first valve 503, second valve 504, third valve 505, fourth valve 506, fifth valve 507, sixth valve 508 , the seventh valve 509 and the eighth valve 510; each evaporative cooling heat exchange unit 10 includes a cooling tower 11, a ninth valve 12 located at the outlet pipeline of the cooling tower 11 and a tenth valve 13 located at the inlet pipeline of the cooling tower 11; Each outdoor air-cooled heat exchange unit 20 includes an outdoor air-cooled heat exchanger 21, an eleventh valve 22, a twelfth valve 23, a thirteenth valve 24 and a fourteenth valve 25; the eleventh valve 22 and the tenth valve One end of the three valves 24 links to each other with the outlet of the outdoor air-cooled heat exchanger 21, and one end of the twelfth valve 23 and the fourteenth valve 25 links to each other with the inlet of the outdoor air-cooled heat exchanger 21; the outlet of each cooling tower 11 and The outlet of each outdoor air-cooled heat exchanger 21 is respectively connected in parallel through the ninth valve 12 and the eleventh valve 22, and then sequentially passes through the first liquid pump 501 and the second valve 504 to connect with the inlet of the evaporator 31a, each cooling tower The inlet of 11 and the inlet of each outdoor air-cooled heat exchanger 21 are respectively connected in parallel through the tenth valve 13 and the twelfth valve 23 and then connected with the outlet of the evaporator 31a through the sixth valve 508; each outdoor air-cooled heat exchanger The outlet of 21 is connected to the inlet of condenser 32a through the thirteenth valve 24, the second liquid pump 502 and the third valve 505 in turn, and the inlet of each outdoor air-cooled heat exchanger 21 is connected through the fourteenth valve 25, the seventh The valve 509 is connected with the outlet of the condenser 32a; the user 40 is connected between the inlet of the second liquid pump 502 and the outlet of the seventh valve 509, and a pipe is arranged between the outlet of the first liquid pump 501 and the outlet of the third valve 505. pipeline and the fourth valve 506 between the outlet of the second liquid pump 502 and the outlet of the second valve 504, and between the outlet of the sixth valve 508 and the inlet of the seventh valve 509 A pipeline and an eighth valve 510 are provided between the pipeline and the fifth valve 507 , the inlet of the sixth valve 508 and the outlet of the seventh valve 509 .

Fig. 3 is a schematic diagram of the operating heating mode of the vapor compression air source flexible chiller and hot water unit in the present invention. Open all or part of the eleventh valve 22 and the twelfth valve 23 in the outdoor air-cooled heat exchange unit 20, open the second valve 504, the third valve 505, the sixth valve 508 and the seventh valve 509, and close the outdoor air-cooled The remaining valves in the heat exchange unit 20, all the valves in the evaporative cooling heat exchange unit 10, the first valve 503, the fourth valve 506, the fifth valve 507 and the eighth valve 510 operate the first liquid pump 501, the second liquid pump Pump 502 and vapor compression chiller unit 30 , water or solution is driven by the first liquid pump 501 into the open outdoor air-cooled heat exchange unit 20 and absorbs heat from the environment, and then the vapor compression chiller unit 30 The second liquid pump 502 drives the second liquid pump 502 to absorb heat from the vapor compression hot and cold water unit 30, release heat at the user 40, and supply heat to the user 40.

Fig. 4 is a schematic diagram of the heating and defrosting mode of the vapor compression air source flexible chiller and hot water unit in the present invention. When the system is running in the heating defrosting mode, open the eleventh valve and the twelfth valve in all or part of the outdoor air-cooled heat exchange units 20 that are not frosted, and open all or part of the outdoor air-cooled heat exchange units to be defrosted. The thirteenth valve and the fourteenth valve in the thermal unit 20, open the second valve 504, the third valve 505, the sixth valve 508 and the seventh valve 509, close the remaining valves in the outdoor air-cooled heat exchange unit 20, evaporate All valves in the cold heat exchange unit 10, the first valve 503, the fourth valve 506, the fifth valve 507 and the eighth valve 510, operate the first liquid pump 501, the second liquid pump 502 and the vapor compression chiller and hot water unit 30. Water or solution is driven by the first liquid pump 501 and enters the opened non-frosted outdoor air-cooled heat exchange unit 20 to absorb the heat of the environment, and then releases heat in the vapor compression hot and cold water unit 30 to continuously circulate; another A stream of water or solution is divided into two paths driven by the second liquid pump 502, one path enters the frosted outdoor air-cooled heat exchange unit 20 to release heat and defrost, the other path enters the user 40 to release heat to supply heat to the user, and then two paths Converge and enter the vapor compression cold and hot water unit 30 to absorb heat and circulate continuously.

Fig. 5 is a schematic diagram of the cooling mode of the vapor compression air source flexible chiller and hot water unit in the present invention. Open the ninth valve 12 and the tenth valve 13 in all or part of the evaporative cold heat exchange unit 10, open the first valve 503, the fourth valve 506, the fifth valve 507 and the eighth valve 510, and close the remaining evaporative cold heat exchange units Valves in 10, all valves in the outdoor air-cooled heat exchange unit 20, the second valve 504, the third valve 505, the sixth valve 508 and the seventh valve 509, operate the first liquid pump 501, the second liquid pump 502 and Vapor compression hot and cold water unit 30; water or solution enters the evaporative cooling and heat exchange unit 10 to release heat driven by the first liquid pump 501, and then enters the vapor compression cold and hot water unit 30 to absorb heat and circulate continuously. Or the solution is driven by the second liquid pump 502 into the vapor compression chiller 30 to release heat, then enters the user 40 to absorb heat, and supplies cooling to the user 40 .

Fig. 6 is a schematic structural diagram of an absorption air source flexible chiller and hot water unit in the present invention. The air source flexible cold and hot water unit of the present invention includes three parts: an outdoor unit, an absorption cold and hot water unit 30 and a user 40; the absorption cold and hot water unit 30 includes a generator 35, a solution heat exchanger 36, First throttle valve 37, condenser 32c, absorber 32b, second throttle valve 38, solution pump 39 and evaporator 31b; the solution outlet of the generator 35 in the absorption heat pump unit 30 exchanges heat with the solution in turn The hot end of the device 36, the second throttle valve 38 are connected to the solution inlet of the absorber 32b; the solution outlet of the absorber 32b is successively connected to the solution pump 39, the cold end of the solution heat exchanger 36 and the solution inlet of the generator 35; The steam outlet of the generator 35 is sequentially connected with the steam inlet of the condenser 32c, the first throttle valve 37, the evaporator 31b and the absorber 32b; the brine pipeline inlet of the absorber 32b is connected with the condenser 32c The brine pipeline outlet is connected; the feature is that the outdoor unit includes at least one evaporative cooling heat exchange unit 10, at least two outdoor air-cooled heat exchange units 20, and the first liquid pump 501, the second liquid pump 502, the first Valve 503, second valve 504, third valve 505, fourth valve 506, fifth valve 507, sixth valve 508, seventh valve 509 and eighth valve 510; each evaporative cold heat exchange unit 10 includes a cooling tower 11 , the ninth valve 12 positioned at the outlet pipeline of the cooling tower 11 and the tenth valve 13 positioned at the inlet pipeline of the cooling tower 11; each outdoor air-cooled heat exchange unit 20 includes an outdoor air-cooled heat exchanger 21, an eleventh valve 22 , the twelfth valve 23, the thirteenth valve 24 and the fourteenth valve 25; one end of the eleventh valve 22 and the thirteenth valve 24 is connected with the outlet of the outdoor air-cooled heat exchanger 21, and the twelfth valve 23 and One end of the fourteenth valve 25 is connected to the inlet of the outdoor air-cooled heat exchanger 21; the outlet of each cooling tower 11 and the outlet of each outdoor air-cooled heat exchanger 21 pass through the ninth valve 12 and the eleventh valve 22 respectively After parallel connection, the first liquid pump 501 and the second valve 504 are connected to the inlet of the evaporator 31b in sequence, and the inlet of each cooling tower 11 and the inlet of each outdoor air-cooled heat exchanger 21 are respectively passed through the tenth valve 13 and the first After the twelve valves 23 are connected in parallel, they are connected to the outlet of the evaporator 31b through the sixth valve 508; the outlets of each outdoor air-cooled heat exchanger 21 pass through the thirteenth valve 24, the second liquid pump 502 and the third valve 505 in order to connect with the condensing valve. The inlet of each outdoor air-cooled heat exchanger 21 is connected to the outlet of the absorber 32b through the fourteenth valve 25 and the seventh valve 509 in turn; the user 40 is connected to the inlet of the second liquid pump 502 and the first Between the outlets of seven valves 509, between the outlet of the first liquid pump 501 and the outlet of the third valve 505, a pipeline and the first valve 503 are arranged, between the outlet of the second liquid pump 502 and the outlet of the second valve 504 Be provided with pipeline and the 4th valve 506, be provided with pipeline and the 5th valve 507 between the outlet of the 6th valve 508 and the inlet of the 7th valve 509, the inlet of the 6th valve 508 A pipeline and an eighth valve 510 are provided between the mouth and the outlet of the seventh valve 509.

Fig. 7 is a schematic diagram of the operation and heating mode of the absorption air source flexible chiller and hot water unit in the present invention. When the system operates in the heating mode, open all or part of the eleventh valve 22 and the twelfth valve 23 in the outdoor air-cooled heat exchange unit 20, open the second valve 504, the third valve 505, the sixth valve 508 and The seventh valve 509 closes the remaining valves in the outdoor air-cooled heat exchange unit 20, all valves in the evaporative cooling heat exchange unit 10, the first valve 503, the fourth valve 506, the fifth valve 507 and the eighth valve 510, and runs The first liquid pump 501, the second liquid pump 502 and the absorption chiller and hot water unit 30, water or solution enters the open outdoor air-cooled heat exchange unit 20 under the drive of the first liquid pump 501 and absorbs heat from the environment, and then Heat is released in the absorption chiller and hot water unit 30 and circulates continuously; the other stream of water through the solution absorbs heat from the absorption chiller and hot water unit 30 under the drive of the second liquid pump 502, releases heat at the user 40, and sends heat to the user 40 for heat.

Fig. 8 is a schematic diagram of the heating and defrosting mode of the absorption air source flexible chiller and hot water unit in the present invention. When the system is running in the heating defrosting mode, open the eleventh valve and the twelfth valve in all or part of the outdoor air-cooled heat exchange units 20 that are not frosted, and open all or part of the outdoor air-cooled heat exchange units to be defrosted. The thirteenth valve and the fourteenth valve in the thermal unit 20, open the second valve 504, the third valve 505, the sixth valve 508 and the seventh valve 509, close the remaining valves in the outdoor air-cooled heat exchange unit 20, evaporate All valves in the cold heat exchange unit 10, the first valve 503, the fourth valve 506, the fifth valve 507 and the eighth valve 510, operate the first liquid pump 501, the second liquid pump 502 and the absorption chiller and hot water unit 30 ; Water or solution enters the open non-frosted outdoor air-cooled heat exchange unit 20 under the drive of the first liquid pump 501 to absorb the heat of the environment, and then releases heat in the absorption cold and hot water unit 30, and continuously circulates; The water or solution is divided into two paths driven by the second liquid pump 502, one path enters the frost-forming outdoor air-cooled heat exchange unit 20 to release heat and defrost, and the other path enters the user 40 to release heat to supply heat to the user, and then the two paths merge together Enter the absorption type cold and hot water unit 30 to absorb heat and circulate continuously.

Fig. 9 is a schematic diagram of the cooling mode of the absorption air source flexible chiller and hot water unit in the present invention. When the system is in the cooling mode, open all or part of the ninth valve 12 and the tenth valve 13 in the evaporative cooling heat exchange unit 10, open the first valve 503, the fourth valve 506, the fifth valve 507 and the eighth valve 510, close the valves in the remaining evaporative cooling and heat exchange units 10, all the valves in the outdoor air-cooled heat exchange unit 20, the second valve 504, the third valve 505, the sixth valve 508, and the seventh valve 509, and run the first liquid Pump 501, second liquid pump 502 and absorption chiller and hot water unit 30; driven by the first liquid pump 501, water or solution enters the evaporative cooling and heat exchange unit 10 to release heat, and then enters the absorption chiller and hot water unit 30 to absorb heat , continuously circulates, another way of water or solution is driven by the second liquid pump 502 and enters the absorption chiller 30 to release heat, then enters the user 40 to absorb heat, and supplies cooling to the user 40.

Claims (3)

1. an air-source flexible cold Hot water units, comprises outdoor unit, water chiller-heater unit (30) and user's (40) three parts, water chiller-heater unit (30) is containing heat-absorbing model (31) and heat release module (32), it is characterized in that: outdoor unit comprises at least one evaporating cold heat exchange unit (10), at least two the air-cooled heat exchange unit in outdoors (20), and the first liquid pump (501), the second liquid pump (502), the first valve (503), the second valve (504), the 3rd valve (505), the 4th valve (506), the 5th valve (507), the 6th valve (508), the 7th valve (509) and the 8th valve (510), each evaporating cold heat exchange unit (10) comprises cooling tower (11), be positioned at the 9th valve (12) of cooling tower (11) export pipeline and be positioned at the tenth valve (13) of cooling tower (11) inlet ductwork, the air-cooled heat exchange unit in each outdoor (20) comprises outdoor air cooling heat exchanger (21), the 11 valve (22), the 12 valve (23), the 13 valve (24) and the 14 valve (25), 11 valve (22) is connected with the outlet of outdoor air cooling heat exchanger (21) with one end of the 13 valve (24), and the 12 valve (23) is connected with the entrance of outdoor air cooling heat exchanger (21) with one end of the 14 valve (25), the outlet of each cooling tower (11) and the outlet of each outdoor air cooling heat exchanger (21) are connected with the entrance of the second valve (504) with heat-absorbing model (31) sequentially through the first liquid pump (501) respectively by after the 9th valve (12) and the 11 valve (22) parallel connection, and the entrance of each cooling tower (11) and the entrance of each outdoor air cooling heat exchanger (21) are connected with the outlet of heat-absorbing model (31) through the 6th valve (508) respectively by after the tenth valve (13) and the 12 valve (23) parallel connection, the outlet of each outdoor air cooling heat exchanger (21) is connected with the entrance of heat release module (32) with the 3rd valve (505) by the 13 valve (24), the second liquid pump (502) successively, and the entrance of each outdoor air cooling heat exchanger (21) is connected with the outlet of heat release module (32) by the 14 valve (25), the 7th valve (509) successively, user (40) is connected between the entrance of the second liquid pump (502) and the outlet of the 7th valve (509), pipeline and the first valve (503) is provided with between the outlet of the first liquid pump (501) and the outlet of the 3rd valve (505), pipeline and the 4th valve (506) is provided with between the outlet of the second liquid pump (502) and the outlet of the second valve (504), pipeline and the 5th valve (507) is provided with between the outlet of the 6th valve (508) and the entrance of the 7th valve (509), pipeline and the 8th valve (510) is provided with between the entrance of the 6th valve (508) and the outlet of the 7th valve (509).

2. according to a kind of air-source flexible cold Hot water units according to claim 1, it is characterized in that: described water chiller-heater unit (30) adopts steam compression type water chiller-heater unit or absorption-type cold-hot water dispenser group.

3. adopt an operation method for air-source flexible cold Hot water units as claimed in claim 1, it is characterized in that: this operation method comprises following three kinds of operational modes:

A. heat supply mode: when system cloud gray model is at heat supply mode, open the 11 valve (22) in the outdoor air-cooled heat exchange unit (20) of all or part and the 12 valve (23), open the second valve (504), 3rd valve (505), 6th valve (508) and the 7th valve (509), remaining valve in close chamber's external air cooling system heat exchange unit (20), all valves in evaporating cold heat exchange unit (10), first valve (503), 4th valve (506), 5th valve (507) and the 8th valve (510), run the first liquid pump (501), second liquid pump (502) and water chiller-heater unit (30), water or solution enter the air-cooled heat exchange unit in the outdoor (20) of unlatching and absorb heat from environment under the driving of the first liquid pump (501), then heat release in the heat-absorbing model (31) in water chiller-heater unit (30), continuous circulation, another strand of water is crossed solution and is absorbed heat from the heat release module (32) of water chiller-heater unit (30) under the driving of the second liquid pump (502), in user (40) place's heat release, to user (40) heat supply,

B. heat supply defrosting mode: when system cloud gray model is at heat supply defrosting mode, open the 11 valve in the air-cooled heat exchange unit in the outdoor (20) of the non-frosting of all or part and the 12 valve, open the 13 valve in the air-cooled heat exchange unit in all or part outdoor to be defrosted (20) and the 14 valve, open the second valve (504), 3rd valve (505), 6th valve (508) and the 7th valve (509), remaining valve in close chamber's external air cooling system heat exchange unit (20), all valves in evaporating cold heat exchange unit (10), first valve (503), 4th valve (506), 5th valve (507) and the 8th valve (510), run the first liquid pump (501), second liquid pump (502) and water chiller-heater unit (30), water or solution enter outdoor air-cooled heat exchange unit (20) the absorbing environmental heat of the non-frosting of opening under the driving of the first liquid pump (501), then heat release in the heat-absorbing model (31) in water chiller-heater unit (30), constantly circulates, another strand of water or solution are divided into two-way under the driving of the second liquid pump (502), one tunnel enters outdoor air-cooled heat exchange unit (20) the heat release defrost of frosting, another road enters user (40) heat release to user's heat supply, then two-way converges and enters heat release module (32) heat absorption of water chiller-heater unit (30), constantly circulates,

C. cooling mode: when system cloud gray model is at cooling mode, open the 9th valve (12) in all or part evaporating cold heat exchange unit (10) and the tenth valve (13), open the first valve (503), 4th valve (506), 5th valve (507) and the 8th valve (510), close the valve in all the other evaporating cold heat exchange units (10), whole valves in outdoor air-cooled heat exchange unit (20), second valve (504), 3rd valve (505), 6th valve (508) and the 7th valve (509), run the first liquid pump (501), second liquid pump (502) and water chiller-heater unit (30), water or solution enter evaporating cold heat exchange unit (10) heat release under the driving of the first liquid pump (501), then water chiller-heater unit (30) heat absorption is entered, continuous circulation, another road water or solution enter water chiller-heater unit (30) heat release under the driving of the second liquid pump (502), then user (40) heat absorption is entered, to user (40) cooling.