A kind of first class lithium bromide absorptive heat pump unit
Technical field:
The utility model relates to a kind of first class lithium bromide absorptive heat pump unit, belongs to technical field of refrigeration equipment.
Background technology:
Lithium bromide absorption type heat pump is under heat energy (steam, hot water, flue gas, fuel etc.) drives, reclaim the heat of low-temperature heat source water, the equipment of the warm water of higher temperature is provided, high because of its warm water temperature that can produce, heating efficiency is high, unit capacity is large, adopt water to be the advantages such as refrigeration matchmaker environmentally safe, unit maintenance convenient management, this unit is more and more extensive in the application in the fields such as air-conditioning, heating, supplying hot water.The lithium bromide absorption type heat pump unit must have heat source water during operation as shown in Figure 1 at present, and source pump can't be moved during without heat source water.In heat pump application such as factories more widely in the field, the spent hot water of factory etc. cause source pump to turn round because situation without heat source water appears in failure and other reasons but in fact.But as the part of system's heat supply, namely will guarantee the operation that system is continual and steady, because the heat source water problem may cause compressor emergency shutdown, this contradiction point can only replenish system by increasing other heat transmission equipments, does like this problem of bringing and is again:
1, initial cost is higher;
2, system is complicated, and floor space is large;
3, operation, adjusting inconvenience.
The utility model content:
The purpose of this utility model is to solve the deficiency of above existence, and a kind of first class lithium bromide absorptive heat pump unit is provided, and is simple and reasonable, the dual-purpose type lithium bromide absorption type heat pump unit that has or not heat source water to move.
The technical scheme that the utility model adopts for achieving the above object is: a kind of first class lithium bromide absorptive heat pump unit, comprise generator, condenser, evaporimeter, absorber, heat exchanger, solution pump, refrigerant pump, the pipeline of throttling arrangement and connecting components, valve, be communicated with by the weak solution pipe between generator and the absorber, on the weak solution pipe solution pump is installed, generator top concentrated solution pipe is communicated with absorber behind heat exchanger, absorber is communicated with evaporimeter, be communicated with by the refrigerant steam pipe between generator and the condenser, pass through the refrigerant cross current between condenser and the evaporimeter, on the refrigerant water pipe throttling arrangement is housed, warm water tube is inner through absorber and condenser, it is characterized in that: to setting up the chilled water bypass pipe between the absorber, and at the chilled water bypass pipe refrigerant control valve is set at condenser; Between concentrated solution pipe and absorber, set up the solution bypass pipe, and at the solution bypass pipe solution control valve is set.
Described chilled water bypass pipe one end of setting up is connected to condenser to the refrigerant water pipe of evaporimeter, and the other end is communicated with absorber.
Described solution bypass pipe one end set up is communicated with absorber, and the other end is connected on the concentrated solution pipe between generator and the heat exchanger.
The utility model increases the chilled water bypass pipe on standard lithium bromide absorption type heat pump basis, by the control valve conversion, make unit when heat source water is arranged by the heat pump mode high-efficiency operation, heat source water hinder for some reason etc. problem can't supply with the time by the vacuum boiler mode operation.Compare with conventional rack and to be characterized in that unit increases the chilled water bypass pipe, by the control valve conversion, can realize having or not the heat source water source pump all can move and produce the warm water purpose of higher temperature.The beneficial effects of the utility model are: under the condition that does not increase other heat transmission equipments, by the conversion to control valve, source pump all can realize steady running when heat source water changes for the condition of stopping, and produces the warm water of higher temperature.Lower early investment reduces the unit floor space, and system is simple, operation, easy to adjust.
In the sufficient unit running process of heat source water flow, refrigerant control valve and solution control valve are closed, and unit is by the normal circulation running.Without heat source water the time, in the unit running process, refrigerant control valve and solution control valve are opened, and the condenser chilled water directly enters absorber, and warm water enters absorber, condenser successively, obtains the warm water of higher temperature through absorption condensation heat.
Description of drawings:
Fig. 1 is lithium bromide absorption type heat pump unit flow chart in the past;
Fig. 2 is lithium bromide absorption type heat pump unit flow chart of the present utility model;
Among the figure: 1, generator 2, condenser 3, evaporimeter 4, absorber 5, heat exchanger 6, throttling arrangement 7, refrigerant pump 8, solution pump 9, chilled water bypass pipe 10, refrigerant control valve 11, solution bypass pipe 12, solution control valve.
The specific embodiment:
As shown in Figure 2 be the new circulation process figure of this practicality, this lithium bromide absorption type heat pump unit is mainly by consisting of with lower member: generator 1, condenser 2, evaporimeter 3, absorber 4, heat exchanger 5, throttling arrangement 6, refrigerant pump 7, solution pump 8, chilled water bypass pipe 9, refrigerant control valve 10, solution bypass pipe 11, solution control valve 12 and connecting line, the formations such as valve, a kind of first class lithium bromide absorptive heat pump unit, comprise generator, condenser, evaporimeter, absorber, heat exchanger, solution pump, refrigerant pump, the pipeline of throttling arrangement and connecting components, valve, be communicated with by the weak solution pipe between generator and the absorber, on the weak solution pipe solution pump is installed, generator top concentrated solution pipe is communicated with absorber behind heat exchanger, absorber is communicated with evaporimeter, be communicated with by the refrigerant steam pipe between generator and the condenser, pass through the refrigerant cross current between condenser and the evaporimeter, on the refrigerant water pipe throttling arrangement is housed, warm water tube is inner through absorber and condenser, it is characterized in that: at condenser to setting up the chilled water bypass pipe between the absorber, and at the chilled water bypass pipe refrigerant control valve is set, chilled water bypass pipe one end of setting up is connected to condenser to the refrigerant water pipe of evaporimeter, and the other end is communicated with absorber; Set up the solution bypass pipe between concentrated solution pipe and absorber, and at the solution bypass pipe solution control valve is set, solution bypass pipe one end set up is communicated with absorber, and the other end is connected on the concentrated solution pipe between generator and the heat exchanger.
Under the condition of heat source water abundance, refrigerant control valve and solution control valve are all closed.This unit running process is: extraneous thermal source (steam, hot water, fuel, flue gas etc.) enters the generator heating from absorber and the bromize lithium dilute solution after the heat exchanger heat exchange, weak solution is heated boiling, the chilled water evaporation, weak solution is concentrated and is concentrated solution, concentrated solution flows out from generator, through over-heat-exchanger, become weak solution after entering the refrigerant steam that absorber absorbs flash-pot, last weak solution enters the cyclic process that generator carries out solution.The refrigerant steam that evaporates from generator enters the condenser heat exchange, then enter evaporimeter through throttling arrangement, then by refrigerant pump refrigerant water droplet in the evaporimeter is drenched on the heat-transfer pipe of evaporimeter, then be refrigerant steam by evaporimeter heat-transfer pipe endogenous pyrogen water heating evaporation, enter at last absorber and absorbed by concentrated solution.Heat source water circulates in evaporator tube, and the outer refrigerant of heating fumigators heat-transfer pipe makes this refrigerant evaporation become refrigerant steam.Warm water circulates in absorber, condenser tube, realizes temperature-rise period twice, absorbs for the first time the absorption heat of absorber, the condensation heat of absorptive condenser for the second time, and this unit is exactly the process that heats by above process implementation.
Under the condition without heat source water, refrigerant control valve and solution control valve are all opened.This unit running process is: extraneous thermal source (steam, hot water, fuel, flue gas etc.) enters the generator heating from the bromize lithium dilute solution of absorber, weak solution is heated boiling, the chilled water evaporation, weak solution is concentrated and is concentrated solution, concentrated solution flows out from generator, enter absorber through the solution bypass pipe, and become weak solution after chilled water from condenser mixes, last weak solution enters the cyclic process that generator carries out solution.The refrigerant steam that evaporates from generator enters the condenser heat exchange, then enters absorber through the chilled water bypass pipe and mixes with solution.Warm water circulates in absorber, condenser tube, and the condensation heat of absorptive condenser realizes temperature-rise period.This unit is exactly the process that heats by above process implementation.
The utility model adopts the bypass measure, the conversion by control valve so that source pump in the situation that have or not heat source water all can reach the purpose of hot water preparing.