CN105890226A - Water source combined cold and heat supply staged heating type water chiller-heater unit and control method thereof - Google Patents
Water source combined cold and heat supply staged heating type water chiller-heater unit and control method thereof Download PDFInfo
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Abstract
The invention discloses a water source combined cold and heat supply staged heating type water chiller-heater unit and a control method thereof. The water chiller-heater unit comprises a plurality of refrigerating systems and an automatic control system. By means of the mode that innovative water source heat supply, combined cold and heat supply, staged heating and staged cooling are combined, problems of an existing traditional combined cold and heat supply water chiller-heater unit are solved. Compared with the traditional combined cold and heat supply water chiller-heater unit, the water chiller-heater unit can normally work in summer and in winter, under the condition that the refrigerating and heating effect is the same to that in the prior art, condensation temperature of a preceding stage of refrigerating system is greatly lowered, evaporation temperature of the preceding stage of refrigerating system is lowered, accordingly the overall energy efficiency ratio of the water source combined cold and heat supply staged heating type water chiller-heater unit is greatly increased, and energy is saved. According to the technical scheme, the water chiller-heater unit has the advantages of being reasonable in design, efficient, capable of saving energy and controlling precision, stable and reliable to operate and the like, saves energy, reduces environment pollution and meets the requirements of energy conservation and emission reduction policies and energy-saving and environment-friendly society construction which are nationally advocated at present.
Description
Technical field
The present invention relates to a kind of water chiller-heater unit, in particular a kind of water source cold-heat alliance level hot type water chiller-heater unit and control method thereof.
Background technology
The public buildings such as current hotel, dining room, hospital, condo, natatorium, large enterprise, need cooling to need hot-water supply simultaneously throughout the year, in summer, these public buildings supply idle call chilled water or technique chilled water, be also required to simultaneously offer have a bath, daily life hot water or technique hot water.In the winter time, they demand heating water, technique hot water, having a bath and daily life hot water, the most also demand provides cold water, equipment cooling water.
There is at present the part can the water chiller-heater unit of cold and heat combined supply, although cold water and hot water can be provided simultaneously, but the water chiller-heater unit of tradition cold and heat combined supply, part only considers that hot and cold water is supplied simultaneously, do not consider when winter need not air conditioner cold water, equipment loses cold water thermal source source, it is impossible to realizing hot water demand is provided separately, equipment winter cannot be properly functioning；Though part considers hot and cold water and supplies and single hot water supply simultaneously, but the design of single-stage type is used, such as in the case of needing 60 DEG C of life heat, the condensation temperature of complete machine needs up to 63 ~ 65 DEG C, thus the compressor operating efficiency that result in single-stage type air conditioner and water heater is at a fairly low, still hot and cold water cannot be greatly lowered simultaneously need to required energy consumption.
Visible, the water chiller-heater unit of the most traditional cold and heat combined supply, part only considers that hot and cold water is supplied simultaneously, does not consider single heat supply, causes cannot use without the occasion of cold water winter；Though part considers hot and cold water and supplies and single hot water supply, but uses single-stage mode of heating simultaneously, compressor operating efficiency is low, energy consumption big, does not meets " energy-saving and emission-reduction " policy and construction of energy economizing type, the requirement of friendly environment society that current country advocates.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
It is an object of the invention to provide a kind of water source cold-heat alliance level hot type water chiller-heater unit and control method thereof, aim to solve the problem that the water chiller-heater unit of existing cold and heat combined supply can not realize list heat and supplies or realize single hot at once using single-stage mode of heating, cause the problem that compressor operating efficiency is low, energy consumption is big.
Technical scheme is as follows:
A kind of water source cold-heat alliance level hot type water chiller-heater unit, wherein, including the first refrigeration system, the second refrigeration system, the 3rd refrigeration system, the 4th refrigeration system and automatic control system, described first refrigeration system, the second refrigeration system, the 3rd refrigeration system arrange consistent with the structure of the 4th refrigeration system；The cold water vaporizer of the first refrigeration system and the cold water vaporizer of the second refrigeration system connect, the cold water vaporizer of the second refrigeration system and the cold water vaporizer of the 3rd refrigeration system connect, and the cold water vaporizer of the 3rd refrigeration system and the cold water vaporizer of the 4th refrigeration system connect；The condenser of the first refrigeration system and the condenser of the second refrigeration system connect, and the condenser of the second refrigeration system and the condenser of the 3rd refrigeration system connect, and the condenser of the 3rd refrigeration system and the condenser of the 4th refrigeration system connect；nullThe water source vaporizer of the first refrigeration system、The water source vaporizer of the second refrigeration system、The water source vaporizer of the 3rd refrigeration system and the water source vaporizer of the 4th refrigeration system pass through water inlet pipe respectively、Outlet pipe is connected in parallel，Water inlet pipe connects the second inflow temperature sensor，Outlet pipe connects the first leaving water temperature sensors、First flow protector and water source water pump，The water inlet of the condenser of the first refrigeration system is sequentially connected with the first inflow temperature sensor and heat-exchanger pump，The cold water vaporizer outlet of the first refrigeration system connects chilled water antifreeze protector、Second leaving water temperature sensors and second flow protector，The discharge outlet of the condenser of the 4th refrigeration system connects the 3rd leaving water temperature sensors and the 3rd traffic protection device，The water inlet of the cold water vaporizer of the 4th refrigeration system connects the 3rd inflow temperature sensor and speed governing coolant water pump，The water source vaporizer of the first refrigeration system、The water source vaporizer of water source vaporizer the 3rd refrigeration system of the second refrigeration system and the water source vaporizer of the 4th refrigeration system all connect water source antifreeze protector respectively；
Described automatic control system includes central controller and sensor data acquisition subsystem, second inflow temperature sensor, first leaving water temperature sensors, first flow protector, first inflow temperature sensor, chilled water antifreeze protector, second leaving water temperature sensors, second flow protector, 3rd leaving water temperature sensors, 3rd traffic protection device, 3rd inflow temperature sensor and water source antifreeze protector are all connected with sensor data acquisition subsystem, sensor data acquisition subsystem is connected with central controller, water source water pump, heat-exchanger pump and speed governing coolant water pump are all connected with central controller, by central controller controls the first refrigeration system, second refrigeration system, 3rd refrigeration system and the 4th refrigeration system are run on request.
Described water source cold-heat alliance level hot type water chiller-heater unit, wherein, described first refrigeration system includes the first compressor, first condenser, first edema caused by disorder of QI, first water source vaporizer and the first cold water vaporizer, described first compressor one end is connected with first condenser one end, the first condenser other end the first cold water vaporizer one end connects, the first cold water vaporizer other end and first edema caused by disorder of QI one end connect, the first edema caused by disorder of QI other end and the first compressor other end connect, first vaporizer one end, water source is connected with the first condenser other end, the first water source vaporizer other end and first edema caused by disorder of QI one end connect；Described first compressor is connected with central controller.
Described water source cold-heat alliance level hot type water chiller-heater unit, wherein, is provided with the first water source vaporizer check valve, is provided with the first cold water vaporizer check valve between the first cold water vaporizer and the first edema caused by disorder of QI between described first water source vaporizer and the first edema caused by disorder of QI；The first cold water vaporizer electromagnetic valve it is provided with between described first condenser and the first cold water vaporizer, being provided with the first water source vaporizer electromagnetic valve between first condenser and the first water source vaporizer, described first cold water vaporizer electromagnetic valve and the first water source vaporizer electromagnetic valve are all connected with central controller；It is provided with the first water source evaporator expansion valve between outlet and the water inlet of described first water source vaporizer, between outlet and the water inlet of the first cold water vaporizer, is provided with the first cold water evaporator expansion valve.
The control method of a kind of water source cold-heat alliance level hot type water chiller-heater unit as described in above-mentioned any one, wherein, specifically includes following steps:
Step A00: input operational mode, setup parameter by display operating panel, open water source cold-heat alliance level hot type water chiller-heater unit；
Step B00: the second inflow temperature sensor, first leaving water temperature sensors, first inflow temperature sensor, second leaving water temperature sensors, 3rd leaving water temperature sensors and the 3rd inflow temperature sensor are monitored each Inlet and outlet water temperature in real time and feed back to sensor data acquisition subsystem, first flow protector, second flow protector and the 3rd traffic protection device, monitor the flow of whole system in real time and feed back to sensor data acquisition subsystem, chilled water antifreeze protector and the temperature of water source antifreeze protector real-time monitoring system also feed back to sensor data acquisition subsystem；
Step C00: sensor data acquisition subsystem the data feedback collected to central controller；
Step D00: central controller passes through discriminatory analysis; control the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the startup of the 4th refrigeration system or shutdown; control whole unit according to different operational modes to run on request, control water source water pump, heat-exchanger pump and speed governing coolant water pump simultaneously and run as requested.
The control method of described water source cold-heat alliance level hot type water chiller-heater unit; wherein; in described step A00-step D00, central controller controls the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the startup of the 4th refrigeration system or shutdown by following steps:
Step a11: input operational mode by display operating panel, set four start-up temperature, respectively TOpen 1、TOpen 2、TOpen 3And TOpen 4, and TOpen 1＜ TOpen 2＜ TOpen 3＜ TOpen 4, set the first inflow temperature Sensor monitoring to inflow temperature as TA, set unit hot water effluent's temperature settings as TB If, it is T that the 3rd leaving water temperature sensors measures actual leaving water temperatureB , set unit chilled water leaving water temperature and value be set as TD If, it is T that the second leaving water temperature sensors measures actual leaving water temperatureD , set the antifreeze setting value of chilled water as TCoolant sets, it is T that chilled water antifreeze protector measures actual chilled water leaving water temperatureCoolant, set antifreeze setting value T in water sourceWater source sets, it is T that water source antifreeze protector measures actual water source leaving water temperatureWater source, open air source cold-hot alliance level hot type water chiller-heater unit；
Step b11: the inflow temperature real-time monitored is fed back to sensor data acquisition subsystem by the first inflow temperature sensor, 3rd leaving water temperature sensors is measured actual leaving water temperature and is fed back to sensor data acquisition subsystem, and the second leaving water temperature sensors is measured actual leaving water temperature and fed back to sensor data acquisition subsystem；
Step c11: sensor data acquisition subsystem the data feedback collected to central controller；
Step d11: central controller judges TAWith TOpen 1、TOpen 2、TOpen 3And TOpen 4Between size, if TA＜ TOpen 1, perform step d12, if TOpen 1＜ TA＜Open 2, perform step d13, if TOpen 2＜ TA＜Open 3, perform step d14, if TOpen 3＜ TA＜Open 4, perform step d15, if TA＞ TOpen 4, perform step d16；
Step d12: central controller controls the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the 4th refrigeration system are all actuated for heating operation；
Step d13: central controller controls the second refrigeration system and the 3rd refrigeration system are actuated for heating operation, the first refrigeration system and the 4th refrigeration system are shut down；
Step d14: central controller controls the 3rd refrigeration system and the 4th refrigeration system are actuated for heating operation, the first refrigeration system and the second refrigeration system are shut down；
Step d15: central controller controls the 4th refrigeration system is actuated for heating operation, the first refrigeration system, the second refrigeration system and the 3rd refrigeration system are shut down；
Step d16: central controller controls the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the 4th refrigeration system are all shut down.
The control method of described water source cold-heat alliance level hot type water chiller-heater unit, wherein, when the operational mode of step a11 input is cold and heat combined supply operational mode, comprises the following steps:
Step e11: the water source vaporizer closed electromagnetic valve of the refrigeration system that central controller controls has been started up, chilled water vaporizer electromagnetic valve is opened, and controls do not have the refrigeration system of startup to remain shut off.
The control method of described water source cold-heat alliance level hot type water chiller-heater unit, wherein, when the operational mode of step a11 input is the hot operational mode of water source list, comprises the following steps:
Step e21: the water source vaporizer electromagnetic valve of the refrigeration system that central controller controls has been started up is opened, chilled water vaporizer closed electromagnetic valve, the refrigeration system controlling not have to start remains shut off.
The control method of described water source cold-heat alliance level hot type water chiller-heater unit, wherein, under cold and heat combined supply operational mode or the hot operational mode of water source list, by following steps, central controller ensures that hot water effluent's temperature reaches setting value:
Step f11: central controller judges TBWith TB IfSize, if TB ＜ TB If, perform step f12, if TB＞ TB If, perform step f13；
Step f12: the compressor of the refrigeration system that central controller controls has been started up carries out load operating, the refrigeration system controlling not have to start remains shut off, it is ensured that hot water effluent's temperature reaches setting value；
Step f13: the compressor of the refrigeration system that central controller controls has been started up carries out unloading and runs, and the refrigeration system controlling not have to start remains shut off, it is ensured that hot water effluent's temperature reaches setting value.
The control method of described water source cold-heat alliance level hot type water chiller-heater unit, wherein, under cold and heat combined supply operational mode, by following steps, central controller ensures that hot water effluent's temperature reaches setting value:
Step f21: central controller judges TDWith TD IfSize, if TD＜ TD If, perform step f22, if TD
＞ TD If, perform step f23；
Step f22: central controller controls speed governing coolant water pump 616 increases water pump water outlet flow, it is ensured that chilled water leaving water temperature reaches setting value；
Step f23: central controller controls speed governing coolant water pump 616 reduces water pump water outlet flow, it is ensured that chilled water leaving water temperature reaches setting value.
The control method of described water source cold-heat alliance level hot type water chiller-heater unit, wherein, central controller ensures the antifreeze operation of whole water source cold-heat alliance level hot type water chiller-heater unit by following steps:
Step g11: central controller judges T respectivelyCoolant setsWith TCoolant、TWater source setsWith TWater sourceSize, if TCoolant sets<TCoolantOr TWater source sets<TWater source, perform step g12, if TCoolant sets>TCoolantOr TWater source sets>TWater source, perform step g13；
Step g12: central controller controls whole water source cold-heat alliance level hot type water chiller-heater unit is shut down and run；
Step g13: central controller controls whole water source cold-heat alliance level hot type water chiller-heater unit startup optimization.
Beneficial effects of the present invention: the present invention is by providing a kind of water source cold-heat alliance level hot type water chiller-heater unit and control method thereof, including the first refrigeration system, the second refrigeration system, the 3rd refrigeration system, the 4th refrigeration system and automatic control system, utilize the mode that water source heat supply, cold and heat combined supply, progressive solution and the gradient cooling of innovation combine, the water chiller-heater unit part effectively solving the most traditional cold and heat combined supply only considers that hot and cold water is supplied simultaneously, do not consider single heat supply, cause cannot use without the occasion of cold water winter；Though part considers hot and cold water and supplies and single hot water supply simultaneously, using single-stage mode of heating, compressor operating efficiency is low, the problem that energy consumption is big；Compared with the water chiller-heater unit of traditional cold and heat combined supply, winter in the technical program summer all can be properly functioning, and in the case of reaching identical refrigeration and heating effect, the condensation temperature of prime refrigeration system is greatly lowered, promote the evaporating temperature of prime refrigeration system, thus significantly promote the overall Energy Efficiency Ratio of water source cold-heat alliance level hot type water chiller-heater unit, save the energy；The technical program has the advantages such as reasonable in design, energy-efficient, control accuracy, stable and reliable operation, saves the energy, reduces environmental pollution, meets " energy-saving and emission-reduction " policy and construction of energy economizing type, the requirement of friendly environment society that current country advocates.
Accompanying drawing explanation
Fig. 1 is the connection diagram of water source cold-heat alliance level hot type water chiller-heater unit in the present invention.
Fig. 2 is the flow chart of steps of the control method of water source cold-heat alliance level hot type water chiller-heater unit in the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, clear and definite, the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.
As shown in Figure 1, this water source cold-heat alliance level hot type water chiller-heater unit includes the first refrigeration system the 100, second refrigeration system the 200, the 3rd refrigeration system the 300, the 4th refrigeration system 400 and automatic control system, and described first refrigeration system the 100, second refrigeration system the 200, the 3rd refrigeration system 300 arranges consistent with the structure of the 4th refrigeration system 400；The cold water vaporizer of the first refrigeration system 100 and the cold water vaporizer of the second refrigeration system 200 connect, the cold water vaporizer of the second refrigeration system 200 and the cold water vaporizer of the 3rd refrigeration system 300 connect, and the cold water vaporizer of the 3rd refrigeration system 300 and the cold water vaporizer of the 4th refrigeration system 400 connect；The condenser of the first refrigeration system 100 and the condenser of the second refrigeration system 200 connect, and the condenser of the second refrigeration system 200 and the condenser of the 3rd refrigeration system 300 connect, and the condenser of the 3rd refrigeration system 300 and the condenser of the 4th refrigeration system 400 connect；nullThe water source vaporizer of the first refrigeration system 100、The water source vaporizer of the second refrigeration system 200、The water source vaporizer of the 3rd refrigeration system 300 and the water source vaporizer of the 4th refrigeration system 400 pass through water inlet pipe respectively、Outlet pipe is connected in parallel，Water inlet pipe connects the second inflow temperature sensor 608，Outlet pipe connects the first leaving water temperature sensors 609、First flow protector 610 and water source water pump 617，The water inlet of the condenser of the first refrigeration system 100 is sequentially connected with the first inflow temperature sensor 602 and heat-exchanger pump 615，The cold water vaporizer outlet of the first refrigeration system 100 connects chilled water antifreeze protector 611、Second leaving water temperature sensors 606 and second flow protector 607，The discharge outlet of the condenser of the 4th refrigeration system 400 connects the 3rd leaving water temperature sensors 603 and the 3rd traffic protection device 604，The water inlet of the cold water vaporizer of the 4th refrigeration system 400 connects the 3rd inflow temperature sensor 605 and speed governing coolant water pump 616，The water source vaporizer of the first refrigeration system 100、The water source vaporizer of water source vaporizer the 3rd refrigeration system 300 of the second refrigeration system 200 and the water source vaporizer of the 4th refrigeration system 400 all connect water source antifreeze protector 612 respectively；nullDescribed automatic control system includes central controller and sensor data acquisition subsystem，Second inflow temperature sensor 608、First leaving water temperature sensors 609、First flow protector 610、First inflow temperature sensor 602、Chilled water antifreeze protector 611、Second leaving water temperature sensors 606、Second flow protector 607、3rd leaving water temperature sensors 603、3rd traffic protection device 604、3rd inflow temperature sensor 605 and water source antifreeze protector 612 are all connected with sensor data acquisition subsystem，Sensor data acquisition subsystem is connected with central controller，Water source water pump 617、Heat-exchanger pump 615 and speed governing coolant water pump 616 are all connected with central controller，By central controller controls the first refrigeration system 100、Second refrigeration system 200、3rd refrigeration system 300 and the 4th refrigeration system 400 are run on request.
Carry out human-computer interactive control for convenience, described automatic control system also includes display operating panel, described display operating panel is connected with central controller, by display operating panel input regulating command to central controller, central controller controls whole air source cold-hot alliance level hot type water chiller-heater unit run on request.
Described first refrigeration system 100 includes the first compressor 101, first condenser 102, first edema caused by disorder of QI 111, first water source vaporizer 107 and the first cold water vaporizer 108, described first compressor 101 one end is connected with first condenser 102 one end, first condenser 102 other end the first cold water vaporizer 108 one end connects, first cold water vaporizer 108 other end and first edema caused by disorder of QI 111 one end connect, first edema caused by disorder of QI 111 other end and first compressor 101 other end connect, first water source vaporizer 107 one end is connected with first condenser 102 other end, first water source vaporizer 107 other end and first edema caused by disorder of QI 111 one end connect；Described first compressor 101 is connected with central controller.
In order to prevent the cold-producing medium of the first refrigeration system 100 from refluxing, it is provided with the first water source vaporizer check valve 109 between described first water source vaporizer 107 and the first edema caused by disorder of QI 111, between the first cold water vaporizer 108 and the first edema caused by disorder of QI 111, is provided with the first cold water vaporizer check valve 110.
Switch between operating modes for the ease of controlling the first refrigeration system 100, it is provided with the first cold water vaporizer electromagnetic valve 104 between described first condenser 102 and the first cold water vaporizer 108, being provided with the first water source vaporizer electromagnetic valve 103 between first condenser 102 and the first water source vaporizer 107, described first cold water vaporizer electromagnetic valve 104 and the first water source vaporizer electromagnetic valve 103 are all connected with central controller.
In order to make the coolant throttle of entrance vaporizer and control cold medium flux, it is provided with the first water source evaporator expansion valve 105 between outlet and the water inlet of described first water source vaporizer 107, between outlet and the water inlet of the first cold water vaporizer 108, is provided with the first cold water evaporator expansion valve 106.
In this water source cold-heat alliance level hot type water chiller-heater unit, the flow process of hot water heating is: hot water side is intake, the condenser being introduced into the first refrigeration system 100 carries out one-level heating, the exhaust gas heat one-level absorbing the first refrigeration system 100 compressor heats up, then, the condenser entering the second refrigeration system 200 carries out three grades of heating, absorb the exhaust gas heat two grades intensification of the second refrigeration system 200 compressor, then, the condenser entering the 3rd refrigeration system 300 carries out three grades of heating, absorb the exhaust gas heat three grades intensification of the 3rd refrigeration system 300 compressor, then, the condenser entering the 4th refrigeration system 400 carries out level Four heating, the exhaust gas heat level Four absorbing the 4th refrigeration system 400 compressor heats up, after level Four heat temperature raising, deliver to after reaching to send water design temperature use terminal to use.
In this water source cold-heat alliance level hot type water chiller-heater unit, the flow process of chilled water cooling is: chilled water initially enters the chilled water vaporizer of the 4th refrigeration system 400 and carries out one-level cooling, absorb the cold of the liquid refrigerants evaporation after the 4th refrigeration system 400 throttling, carry out one-level cooling；Chilled water vaporizer subsequently into the 3rd refrigeration system 300 carries out two grades of coolings, absorbs the cold of the liquid refrigerants evaporation after the 3rd refrigeration system 300 throttling, carries out two grades of coolings；Chilled water vaporizer subsequently into the second refrigeration system 200 carries out three grades of coolings, absorbs the cold of the liquid refrigerants evaporation after the second refrigeration system 200 throttling, carries out three grades of coolings；Chilled water vaporizer subsequently into the first refrigeration system 100 carries out level Four cooling, absorbs the cold of the liquid refrigerants evaporation after the first refrigeration system 100 throttling, carries out level Four cooling, delivers to use terminal to use after reaching chilled water setpoint temperature.
As in figure 2 it is shown, the control method of a kind of water source cold-heat alliance level hot type water chiller-heater unit as described above, specifically include following steps:
Step A00: input operational mode, setup parameter by display operating panel, open water source cold-heat alliance level hot type water chiller-heater unit；
Step B00: the second inflow temperature sensor 608, first leaving water temperature sensors 609, first inflow temperature sensor 602, second leaving water temperature sensors 606, 3rd leaving water temperature sensors 603 and the 3rd inflow temperature sensor 605 are monitored each Inlet and outlet water temperature in real time and feed back to sensor data acquisition subsystem, first flow protector 610, second flow protector 607 and the 3rd traffic protection device 604, monitor the flow of whole system in real time and feed back to sensor data acquisition subsystem, chilled water antifreeze protector 611 and the temperature of water source antifreeze protector 612 real-time monitoring system also feed back to sensor data acquisition subsystem；
Step C00: sensor data acquisition subsystem the data feedback collected to central controller；
Step D00: central controller passes through discriminatory analysis; control first refrigeration system the 100, second refrigeration system the 200, the 3rd refrigeration system 300 and the startup of the 4th refrigeration system 400 or shutdown; control whole unit according to different operational modes to run on request, control water source water pump 617, heat-exchanger pump 615 and speed governing coolant water pump 616 simultaneously and run as requested.
Specifically, in described step A00-step D00, central controller controls first refrigeration system the 100, second refrigeration system the 200, the 3rd refrigeration system 300 and the startup of the 4th refrigeration system 400 or shutdown by following steps:
Step a11: input operational mode by display operating panel, set four start-up temperature, respectively TOpen 1、TOpen 2、TOpen 3And TOpen 4, and TOpen 1＜ TOpen 2＜ TOpen 3＜ TOpen 4, set inflow temperature that the first inflow temperature sensor 602 monitors as TA, set unit hot water effluent's temperature settings as TB If, it is T that the 3rd leaving water temperature sensors 603 measures actual leaving water temperatureB, set unit chilled water leaving water temperature and value be set as TD If, it is T that the second leaving water temperature sensors 606 measures actual leaving water temperatureD, set the antifreeze setting value of chilled water as TCoolant sets, it is T that chilled water antifreeze protector 611 measures actual chilled water leaving water temperatureCoolant, set antifreeze setting value T in water sourceWater source sets, it is T that water source antifreeze protector 612 measures actual water source leaving water temperatureWater source, open air source cold-hot alliance level hot type water chiller-heater unit；
Step b11: the inflow temperature real-time monitored is fed back to sensor data acquisition subsystem by the first inflow temperature sensor 602,3rd leaving water temperature sensors 603 is measured actual leaving water temperature and is fed back to sensor data acquisition subsystem, and the second leaving water temperature sensors 606 is measured actual leaving water temperature and fed back to sensor data acquisition subsystem；
Step c11: sensor data acquisition subsystem the data feedback collected to central controller；
Step d11: central controller judges TAWith TOpen 1、TOpen 2、TOpen 3And TOpen 4Between size, if TA＜ TOpen 1, perform step d12, if TOpen 1＜ TA＜Open 2, perform step d13, if TOpen 2＜ TA＜Open 3, perform step d14, if TOpen 3＜ TA＜Open 4, perform step d15, if TA＞ TOpen 4, perform step d16；
Step d12: central controller controls the first refrigeration system the 100, second refrigeration system the 200, the 3rd refrigeration system 300 and the 4th refrigeration system 400 are all actuated for heating operation；
Step d13: central controller controls the second refrigeration system 200 and the 3rd refrigeration system 300 are actuated for heating operation, the first refrigeration system 100 and the 4th refrigeration system 400 are shut down；
Step d14: central controller controls the 3rd refrigeration system 300 and the 4th refrigeration system 400 are actuated for heating operation, the first refrigeration system 100 and the second refrigeration system 200 are shut down；
Step d15: central controller controls the 4th refrigeration system 400 is actuated for heating operation, first refrigeration system the 100, second refrigeration system 200 and the 3rd refrigeration system 300 are shut down；
Step d16: central controller controls the first refrigeration system the 100, second refrigeration system the 200, the 3rd refrigeration system 300 and the 4th refrigeration system 400 are all shut down.
After central controller controls first refrigeration system the 100, second refrigeration system the 200, the 3rd refrigeration system 300 by above-mentioned steps and the 4th refrigeration system 400 starts or shuts down; central controller controls unit according to the operational mode that step a11 inputs and runs on request, specific as follows:
When the operational mode of step a11 input is cold and heat combined supply operational mode, comprise the following steps:
Step e11: the water source vaporizer closed electromagnetic valve of the refrigeration system that central controller controls has been started up, chilled water vaporizer electromagnetic valve is opened, and controls do not have the refrigeration system of startup to remain shut off.
Under cold and heat combined supply operational mode, the cooling flow of whole unit is: after the refrigerant vapour of low-temp low-pressure is respectively through the compressor of the refrigeration system having been started up, form High Temperature High Pressure superheated vapor, enter have been started up refrigeration system condenser carry out being cooled into cold-producing medium subcooled liquid, cold-producing medium subcooled liquid sequentially passes through the chilled water vaporizer electromagnetic valve of each refrigeration system having been started up, Low temperature low pressure liquid is formed after the throttling of chilled water evaporator expansion valve, chilled water vaporizer subsequently into each refrigeration system having been started up is evaporated absorbing the heat of idle call chilled water, form low-temp low-pressure steam, again by the chilled water vaporizer check valve of each refrigeration system having been started up, edema caused by disorder of QI by each refrigeration system having been started up, return to the air entry of the compressor of each refrigeration system having been started up.
When the operational mode of step a11 input is the hot operational mode of water source list, comprise the following steps:
Step e21: the water source vaporizer electromagnetic valve of the refrigeration system that central controller controls has been started up is opened, chilled water vaporizer closed electromagnetic valve, the refrigeration system controlling not have to start remains shut off.
Under the hot operational mode of water source list, the cooling flow of whole unit is: after the refrigerant vapour of low-temp low-pressure is respectively through the compressor of the refrigeration system having been started up, form High Temperature High Pressure superheated vapor, the refrigeration system having been started up condenser carry out being cooled into cold-producing medium subcooled liquid, cold-producing medium subcooled liquid is through the water source vaporizer electromagnetic valve of each refrigeration system having been started up, Low temperature low pressure liquid is formed after water source evaporator expansion valve throttling, water source vaporizer subsequently into each refrigeration system having been started up is evaporated absorbing the heat of air, form low-temp low-pressure steam, again by the water source vaporizer check valve of each refrigeration system having been started up, edema caused by disorder of QI by each refrigeration system having been started up, return to the air entry of the compressor of each refrigeration system having been started up.
Under cold and heat combined supply operational mode or the hot operational mode of water source list, by following steps, central controller ensures that hot water effluent's temperature reaches setting value:
Step f11: central controller judges TBWith TB IfSize, if TB ＜ TB If, perform step f12, if TB＞ TB If, perform step f13；
Step f12: the compressor of the refrigeration system that central controller controls has been started up carries out load operating, the refrigeration system controlling not have to start remains shut off, it is ensured that hot water effluent's temperature reaches setting value；
Step f13: the compressor of the refrigeration system that central controller controls has been started up carries out unloading and runs, and the refrigeration system controlling not have to start remains shut off, it is ensured that hot water effluent's temperature reaches setting value.
Under cold and heat combined supply operational mode, by following steps, central controller ensures that hot water effluent's temperature reaches setting value:
Step f21: central controller judges TDWith TD IfSize, if TD＜ TD If, perform step f22, if TD
＞ TD If, perform step f23；
Step f22: central controller controls speed governing coolant water pump 616 increases water pump water outlet flow, it is ensured that chilled water leaving water temperature reaches setting value；
Step f23: central controller controls speed governing coolant water pump 616 reduces water pump water outlet flow, it is ensured that chilled water leaving water temperature reaches setting value.
Central controller ensures the antifreeze operation of whole water source cold-heat alliance level hot type water chiller-heater unit by following steps:
Step g11: central controller judges T respectivelyCoolant setsWith TCoolant、TWater source setsWith TWater sourceSize, if TCoolant sets<TCoolantOr TWater source sets<TWater source, perform step g12, if TCoolant sets>TCoolantOr TWater source sets>TWater source, perform step g13；
Step g12: central controller controls whole water source cold-heat alliance level hot type water chiller-heater unit is shut down and run；
Step g13: central controller controls whole water source cold-heat alliance level hot type water chiller-heater unit startup optimization.
This technical method compared with prior art has the advantage that
1, the water chiller-heater unit of traditional cold and heat combined supply, part only considers that hot and cold water is supplied simultaneously, does not considers when winter need not air conditioner cold water, it is impossible to single offer hot water situation, winter cannot be properly functioning.
The technical program can produce hot water and idle call chilled water simultaneously, it would however also be possible to employ water source individually produces hot water, and unit has two kinds of operational modes, including: cold and heat combined supply operational mode and the hot operational mode of water source list.
Summer simultaneously need to during hot and cold water, unit operation cold and heat combined supply operational mode, absorb the heat of cold water, produce hot water, produce hot and cold water simultaneously, save the energy；When winter is without using air conditioner cold water, only needing hot water, the unit operation water source hot operational mode of list, absorb the heat at heat source side water source, only produce hot water；Thus realize winter and summer all can be with the function of heat supply, meanwhile, summer can also supply air conditioner cold water, kills two birds with one stone.
2, the water chiller-heater unit of traditional cold and heat combined supply, though part considers hot and cold water and supplies and water source list hot water supply simultaneously, but the design of single-stage type is used, such as in the case of needing 60 DEG C of life heat, the condensation temperature of complete machine needs up to 63 ~ 65 DEG C, thus the compressor operating efficiency that result in single-stage type air conditioner and water heater is at a fairly low, still hot and cold water cannot be greatly lowered simultaneously need to required energy consumption.
The hot water of the technical program uses level Four refrigeration system stepped heating, every grade of refrigeration system heating uses again heat regenerator and condenser two-stage to heat, compared with traditional single-stage list condensation type air conditioner and water heater, such as in the case of needing 60 DEG C of life heat, as a example by fourth stage refrigeration system heats, now delivery temperature reaches 90 ~ 95 DEG C, now the 20% of sensible heat point total amount of heat, sensible heat about can produce 2 DEG C of temperature rises, therefore the leaving water temperature of condenser is 58 DEG C, so, the condensation temperature of fourth stage refrigeration system can only reach 61 ~ 63 DEG C, namely in the case of identical leaving water temperature, the condensing pressure of remaining system declines 2 DEG C equally, reduce the condensation temperature of refrigeration system on the whole, thus improve the Energy Efficiency Ratio of complete machine, save the energy.
3, traditional water chiller-heater unit uses single-stage evaporator design, such as in the case of needing 7 DEG C of chilled waters, the evaporating temperature needs of complete machine are low reaches 2 ~ 5 DEG C, thus the compressor operating efficiency that result in single-stage type handpiece Water Chilling Units is at a fairly low, and energy consumption chilled water needed for still cannot be greatly lowered.
The vaporizer of the technical program uses level Four refrigeration system, the design of level cold type, compared with traditional single-stage type water chiller-heater unit, such as in the case of needing 7 DEG C of chilled waters, point level Four refrigeration system Cooling Design step by step, except the evaporating temperature of rear class system need low reach 2 ~ 5 DEG C in addition to, the condensing pressure of remaining system can be at 4.5 ~ 7.5 DEG C, it is greatly improved the evaporating temperature of earlier stages refrigeration system, thus significantly improves the Energy Efficiency Ratio of complete machine, save the energy.
4, the technical program control accuracy is high; central control system is according to input requirements such as hot water effluent's temperature setting of display operating panel, chilled water water outlet temperature settings; gather the hot water effluent's temperature in actual motion by sensor data acquisition subsystem, chilled water goes out the data such as temperature; automatically calculate and control each execution system; control four compressors, heat-exchanger pump and the start-stop of coolant water pump or load proportion; guarantee that the cold water supplied at any time and hot water temperature reach actually used demand, be effectively improved the leaving water temperature control accuracy of hot and cold water.
In sum, the technical program efficiently solves the water chiller-heater unit of the most traditional cold and heat combined supply, and part only considers that hot and cold water is supplied simultaneously, does not consider single heat supply, causes cannot use without the occasion of cold water winter；Though part considers hot and cold water and supplies and single hot water supply, but uses single-stage mode of heating simultaneously, compressor operating efficiency is low, the problem that energy consumption is big；What the technical program was creative have employed the mode that water source heat supply, cold and heat combined supply and progressive solution combine with cooling, achieve cold and heat combined supply operational mode and the energy-conservation method of operation flexibly of level hot type that list hot operational mode in water source combines, realize the hot energy-saving run of cold and heat combined supply level in summer, winter the hot energy-saving run of water source list thermal level, compared with the water chiller-heater unit of traditional cold and heat combined supply, winter in summer all can be properly functioning, Energy Efficiency Ratio is higher, more saving the energy, reasonable in design, energy-efficient, operational mode switches flexible, control accuracy and degree of intelligence is high, stable and reliable operation;The technical program is saved the energy, is reduced environmental pollution, meets the energy-conservation and environmental protection policy that country advocates, has important economy and social meaning.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (10)
1. a water source cold-heat alliance level hot type water chiller-heater unit, it is characterized in that, including the first refrigeration system, the second refrigeration system, the 3rd refrigeration system, the 4th refrigeration system and automatic control system, described first refrigeration system, the second refrigeration system, the 3rd refrigeration system arrange consistent with the structure of the 4th refrigeration system；The cold water vaporizer of the first refrigeration system and the cold water vaporizer of the second refrigeration system connect, the cold water vaporizer of the second refrigeration system and the cold water vaporizer of the 3rd refrigeration system connect, and the cold water vaporizer of the 3rd refrigeration system and the cold water vaporizer of the 4th refrigeration system connect；The condenser of the first refrigeration system and the condenser of the second refrigeration system connect, and the condenser of the second refrigeration system and the condenser of the 3rd refrigeration system connect, and the condenser of the 3rd refrigeration system and the condenser of the 4th refrigeration system connect；nullThe water source vaporizer of the first refrigeration system、The water source vaporizer of the second refrigeration system、The water source vaporizer of the 3rd refrigeration system and the water source vaporizer of the 4th refrigeration system pass through water inlet pipe respectively、Outlet pipe is connected in parallel，Water inlet pipe connects the second inflow temperature sensor，Outlet pipe connects the first leaving water temperature sensors、First flow protector and water source water pump，The water inlet of the condenser of the first refrigeration system is sequentially connected with the first inflow temperature sensor and heat-exchanger pump，The cold water vaporizer outlet of the first refrigeration system connects chilled water antifreeze protector、Second leaving water temperature sensors and second flow protector，The discharge outlet of the condenser of the 4th refrigeration system connects the 3rd leaving water temperature sensors and the 3rd traffic protection device，The water inlet of the cold water vaporizer of the 4th refrigeration system connects the 3rd inflow temperature sensor and speed governing coolant water pump，The water source vaporizer of the first refrigeration system、The water source vaporizer of water source vaporizer the 3rd refrigeration system of the second refrigeration system and the water source vaporizer of the 4th refrigeration system all connect water source antifreeze protector respectively；
Described automatic control system includes central controller and sensor data acquisition subsystem, second inflow temperature sensor, first leaving water temperature sensors, first flow protector, first inflow temperature sensor, chilled water antifreeze protector, second leaving water temperature sensors, second flow protector, 3rd leaving water temperature sensors, 3rd traffic protection device, 3rd inflow temperature sensor and water source antifreeze protector are all connected with sensor data acquisition subsystem, sensor data acquisition subsystem is connected with central controller, water source water pump, heat-exchanger pump and speed governing coolant water pump are all connected with central controller, by central controller controls the first refrigeration system, second refrigeration system, 3rd refrigeration system and the 4th refrigeration system are run on request.
Water source cold-heat alliance level hot type water chiller-heater unit the most according to claim 1, it is characterized in that, described first refrigeration system includes the first compressor, first condenser, first edema caused by disorder of QI, first water source vaporizer and the first cold water vaporizer, described first compressor one end is connected with first condenser one end, the first condenser other end the first cold water vaporizer one end connects, the first cold water vaporizer other end and first edema caused by disorder of QI one end connect, the first edema caused by disorder of QI other end and the first compressor other end connect, first vaporizer one end, water source is connected with the first condenser other end, the first water source vaporizer other end and first edema caused by disorder of QI one end connect；Described first compressor is connected with central controller.
Water source cold-heat alliance level hot type water chiller-heater unit the most according to claim 2, it is characterized in that, it is provided with the first water source vaporizer check valve between described first water source vaporizer and the first edema caused by disorder of QI, between the first cold water vaporizer and the first edema caused by disorder of QI, is provided with the first cold water vaporizer check valve；The first cold water vaporizer electromagnetic valve it is provided with between described first condenser and the first cold water vaporizer, being provided with the first water source vaporizer electromagnetic valve between first condenser and the first water source vaporizer, described first cold water vaporizer electromagnetic valve and the first water source vaporizer electromagnetic valve are all connected with central controller；It is provided with the first water source evaporator expansion valve between outlet and the water inlet of described first water source vaporizer, between outlet and the water inlet of the first cold water vaporizer, is provided with the first cold water evaporator expansion valve.
4. the control method of the water source cold-heat alliance level hot type water chiller-heater unit as described in claim 1-3 any one, it is characterised in that specifically include following steps:
Step A00: input operational mode, setup parameter by display operating panel, open water source cold-heat alliance level hot type water chiller-heater unit；
Step B00: the second inflow temperature sensor, first leaving water temperature sensors, first inflow temperature sensor, second leaving water temperature sensors, 3rd leaving water temperature sensors and the 3rd inflow temperature sensor are monitored each Inlet and outlet water temperature in real time and feed back to sensor data acquisition subsystem, first flow protector, second flow protector and the 3rd traffic protection device, monitor the flow of whole system in real time and feed back to sensor data acquisition subsystem, chilled water antifreeze protector and the temperature of water source antifreeze protector real-time monitoring system also feed back to sensor data acquisition subsystem；
Step C00: sensor data acquisition subsystem the data feedback collected to central controller；
Step D00: central controller passes through discriminatory analysis; control the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the startup of the 4th refrigeration system or shutdown; control whole unit according to different operational modes to run on request, control water source water pump, heat-exchanger pump and speed governing coolant water pump simultaneously and run as requested.
The control method of water source cold-heat alliance level hot type water chiller-heater unit the most according to claim 4; it is characterized in that; in described step A00-step D00, central controller controls the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the startup of the 4th refrigeration system or shutdown by following steps:
Step a11: input operational mode by display operating panel, set four start-up temperature, respectively TOpen 1、TOpen 2、TOpen 3And TOpen 4, and TOpen 1＜ TOpen 2＜ TOpen 3＜ TOpen 4, set the first inflow temperature Sensor monitoring to inflow temperature as TA, set unit hot water effluent's temperature settings as TB If, it is T that the 3rd leaving water temperature sensors measures actual leaving water temperatureB , set unit chilled water leaving water temperature and value be set as TD If, it is T that the second leaving water temperature sensors measures actual leaving water temperatureD , set the antifreeze setting value of chilled water as TCoolant sets, it is T that chilled water antifreeze protector measures actual chilled water leaving water temperatureCoolant, set antifreeze setting value T in water sourceWater source sets, it is T that water source antifreeze protector measures actual water source leaving water temperatureWater source, open air source cold-hot alliance level hot type water chiller-heater unit；
Step b11: the inflow temperature real-time monitored is fed back to sensor data acquisition subsystem by the first inflow temperature sensor, 3rd leaving water temperature sensors is measured actual leaving water temperature and is fed back to sensor data acquisition subsystem, and the second leaving water temperature sensors is measured actual leaving water temperature and fed back to sensor data acquisition subsystem；
Step c11: sensor data acquisition subsystem the data feedback collected to central controller；
Step d11: central controller judges TAWith TOpen 1、TOpen 2、TOpen 3And TOpen 4Between size, if TA＜ TOpen 1, perform step d12, if TOpen 1＜ TA＜Open 2, perform step d13, if TOpen 2＜ TA＜Open 3, perform step d14, if TOpen 3＜ TA＜Open 4, perform step d15, if TA＞ TOpen 4, perform step d16；
Step d12: central controller controls the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the 4th refrigeration system are all actuated for heating operation；
Step d13: central controller controls the second refrigeration system and the 3rd refrigeration system are actuated for heating operation, the first refrigeration system and the 4th refrigeration system are shut down；
Step d14: central controller controls the 3rd refrigeration system and the 4th refrigeration system are actuated for heating operation, the first refrigeration system and the second refrigeration system are shut down；
Step d15: central controller controls the 4th refrigeration system is actuated for heating operation, the first refrigeration system, the second refrigeration system and the 3rd refrigeration system are shut down；
Step d16: central controller controls the first refrigeration system, the second refrigeration system, the 3rd refrigeration system and the 4th refrigeration system are all shut down.
The control method of water source cold-heat alliance level hot type water chiller-heater unit the most according to claim 5, it is characterised in that when the operational mode of step a11 input is cold and heat combined supply operational mode, comprise the following steps:
Step e11: the water source vaporizer closed electromagnetic valve of the refrigeration system that central controller controls has been started up, chilled water vaporizer electromagnetic valve is opened, and controls do not have the refrigeration system of startup to remain shut off.
The control method of water source cold-heat alliance level hot type water chiller-heater unit the most according to claim 5, it is characterised in that when the operational mode of step a11 input is the hot operational mode of water source list, comprise the following steps:
Step e21: the water source vaporizer electromagnetic valve of the refrigeration system that central controller controls has been started up is opened, chilled water vaporizer closed electromagnetic valve, the refrigeration system controlling not have to start remains shut off.
8. according to the control method of the water source cold-heat alliance level hot type water chiller-heater unit described in claim 6 or 7, it is characterized in that, under cold and heat combined supply operational mode or the hot operational mode of water source list, by following steps, central controller ensures that hot water effluent's temperature reaches setting value:
Step f11: central controller judges TBWith TB IfSize, if TB ＜ TB If, perform step f12, if TB ＞ TB If, perform step f13；
Step f12: the compressor of the refrigeration system that central controller controls has been started up carries out load operating, the refrigeration system controlling not have to start remains shut off, it is ensured that hot water effluent's temperature reaches setting value；
Step f13: the compressor of the refrigeration system that central controller controls has been started up carries out unloading and runs, and the refrigeration system controlling not have to start remains shut off, it is ensured that hot water effluent's temperature reaches setting value.
The control method of water source cold-heat alliance level hot type water chiller-heater unit the most according to claim 6, it is characterised in that under cold and heat combined supply operational mode, by following steps, central controller ensures that hot water effluent's temperature reaches setting value:
Step f21: central controller judges TDWith TD IfSize, if TD＜ TD If, perform step f22, if TD＞ TD If, perform step f23；
Step f22: central controller controls speed governing coolant water pump 616 increases water pump water outlet flow, it is ensured that chilled water leaving water temperature reaches setting value；
Step f23: central controller controls speed governing coolant water pump 616 reduces water pump water outlet flow, it is ensured that chilled water leaving water temperature reaches setting value.
The control method of water source cold-heat alliance level hot type water chiller-heater unit the most according to claim 5, it is characterised in that central controller ensures the antifreeze operation of whole water source cold-heat alliance level hot type water chiller-heater unit by following steps:
Step g11: central controller judges T respectivelyCoolant setsWith TCoolant、TWater source setsWith TWater sourceSize, if TCoolant sets<TCoolantOr TWater source sets<TWater source, perform step g12, if TCoolant sets>TCoolantOr TWater source sets>TWater source, perform step g13；
Step g12: central controller controls whole water source cold-heat alliance level hot type water chiller-heater unit is shut down and run；
Step g13: central controller controls whole water source cold-heat alliance level hot type water chiller-heater unit startup optimization.
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