JPH065146B2 - Absorption heat pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention operates a generator and a condenser at a temperature lower than that of an evaporator and an absorber, and when the absorbing liquid absorbs the refrigerant in the absorber. The present invention relates to an absorption heat pump device (hereinafter, referred to as an absorption heat pump device of this kind) that heats a fluid to be heated to a temperature equal to or higher than a temperature of a heat source fluid and extracts the heated fluid.

(B) Conventional technology Since this type of absorption heat pump device operates the condenser at a temperature lower than that of the evaporator, if the amount of refrigerant liquid sent from the condenser to the evaporator fluctuates rapidly, the refrigerant liquid in the evaporator The temperature and pressure change abruptly, and the heat quantity of the heated fluid taken out of the absorber also fluctuates greatly and becomes unstable. Therefore, in this type of absorption heat pump device, it is necessary to stabilize the amount of heat taken out from the absorber by adjusting the amount of the refrigerant liquid sent from the condenser to the evaporator.

Then, as a conventional technique for adjusting the amount of the refrigerant liquid sent from the condenser to the evaporator, as a signal from the liquid level detector provided in the refrigerant liquid reservoir of the condenser, the condenser to the evaporator is transmitted through the controller. Means for controlling the opening degree of a control valve provided in the middle of the refrigerant liquid pipe (for example, Japanese Patent Laid-Open No. 58-136956)
There is.

(C) Problems to be Solved by the Invention In the above-mentioned conventional techniques, the sensor part of the liquid level detector is polluted by the absorbing liquid and impurities mixed in the refrigerant liquid, and the performance thereof deteriorates, and the control operation is Has the drawback that it tends to be inaccurate, and that it requires an expensive control valve and an expensive controller that operate with high precision by means of a precisely manufactured motor and air pressure. Have

In view of these problems of the prior art, the present invention adjusts the flow rate of the refrigerant liquid from the condenser to the evaporator according to the amount of the refrigerant liquid in the condenser by performing a substantially accurate control operation with a simple structure. It is an object of the present invention to provide an absorption heat pump of this kind provided with a low-cost refrigerant liquid flow controller that can be used.

(D) Means for Solving the Problems The present invention relates to an absorption heat pump of this type, and as means for solving the above problems, the evaporator is interlocked with the vertical movement of the float provided in the refrigerant liquid reservoir of the condenser. The flow rate controller with a valve mechanism that increases or decreases the outlet area of the refrigerant liquid to the side is arranged in the refrigerant liquid in the refrigerant liquid reservoir of the condenser, and the arm attached to the float and the valve body are connected. The stem is formed divergent downward with respect to the inner wall of the sleeve attached to the valve box of the controller.

(E) Action In the means according to the present invention, when the amount of the refrigerant liquid in the condenser starts to increase, the valve body interlocking with the float operates to widen the outlet area of the refrigerant liquid to the evaporator side and interlocks with the float. The stem operates to narrow the gap between the inner wall of the sleeve attached to the valve box of the flow controller deployed in the refrigerant liquid in the condenser and the stem, gradually increasing the amount sent from the condenser to the evaporator and condensing. It acts to gradually reduce the amount of refrigerant liquid returned to the vessel. When the amount of refrigerant liquid in the condenser begins to decrease, the valve body and the stem that interlock with the float operate in reverse, gradually decreasing the amount of refrigerant liquid sent from the condenser to the evaporator, and It works so as to gradually increase the amount of the refrigerant liquid that is returned to the. Since the means according to the present invention has such an action, it is possible to reliably adjust the flow rate of the refrigerant liquid from the condenser to the evaporator in accordance with the amount of the refrigerant liquid in the condenser, and It is possible to prevent a rapid change in the amount of the refrigerant liquid sent to the container.

Further, in the means according to the present invention, since the flow rate controller having the valve mechanism interlocked with the float has a simple structure provided in the refrigerant liquid in the condenser, an expensive control valve that operates with high accuracy is provided. And conventional means that require a controller,
There are few breakdowns and the cost is low.

(F) Embodiment FIG. 1 is a schematic configuration explanatory view showing an embodiment of an absorption heat pump device of this kind according to the present invention, and FIG. 2 is a partial cutaway view of the absorption heat pump device of the present invention. In the enlarged explanatory view, the same components as those shown in FIG. 1 are designated by the same reference numerals.

In FIG. 1, (1) is a generator, (2) is a condenser, (3) is an evaporator, (4) is an absorber, (5) is a solution heat exchanger, and (6) is for absorbing liquid. Pumps, (7), (8) are pumps for refrigerant liquid, these devices are ducts (9), (10) through which the refrigerant vapor flows, pipes (11), (12), (13) through which the refrigerant liquid flows, Refrigerant liquid return pipe (14), (1
5), absorption liquid flow pipes (16), (17), (18) and absorption liquid flow-down pipes (19), (20), which are connected to each other to obtain a conventional absorption heat pump of this type (for example, JP-A-58). -69372) and a circulation path for the refrigerant (water) and the absorbing liquid (lithium bromide aqueous solution) similar to Incidentally, (21) is a heat exchange coil built in the solution heat exchanger (5).

(22) is a heater built in the generator (1), (23) is a cooler built in the condenser (2), (24) is a heat source built in the evaporator (3),
(25) is a device to be heated built in the absorber (4), and (26), (2
(7) is a pipe for flowing a heat source fluid such as waste hot water or waste steam connected to the heater (22), and (28) and (29) are cooling fluid such as cooling water and cooling air connected to the cooler (23). , (30) and (31) are pipes for flowing heat source fluid such as waste hot water and waste steam connected to the heat supply device (24), and (32) and (33) are connected to the heater (25). It is a pipe through which heated fluid such as hot water or steam flows.

(34) and (35) are respectively a generator (1), a sprayer of the absorbing liquid provided in the absorber (4), (36) is a sprayer of the refrigerant liquid provided in the evaporator (3), 37) and (38) are the reservoirs of the generator (1) and the absorber (4), and (39) and (40) are the condenser (2) and evaporator (3), respectively.
And (41) and (42) are eliminators.

(SW ₁ ) is a liquid level switch provided in the solution reservoir (37), (S 1
W ₂ ) and (SW ₃ ) are liquid level switches provided in the refrigerant liquid reservoirs (39) and (40), respectively.
(6), (7), and (8) are controlled to start and stop, respectively, so that the liquid level is maintained between the upper and lower limit levels.

(43) is a pipe for blowing the refrigerant liquid having an on-off valve (V),
The on-off valve (V) is opened before the operation is stopped, and the refrigerant liquid in the refrigerant liquid reservoir (40) is blown to the lower limit level of the liquid level by the pump (8). Incidentally, (44) and (45) are dampers provided in the pipes (17) and (20), respectively.

And, (46) is a float provided in the refrigerant liquid reservoir (39),
Reference numeral 7) is a flow rate controller provided with a valve mechanism interlocking with the float (46), and this flow rate controller is arranged in the refrigerant liquid in the refrigerant liquid reservoir (39). Further, the valve mechanism of the flow rate controller (47) includes a valve body (49) for adjusting the width of the refrigerant liquid outlet (48), the valve body and the float.
Stem that connects with the rotating arm (50) attached to (46)
(51), sleeve (5) attached to the valve box (52) of the flow controller (47)
3) etc., and the stem (51) has a sleeve (5
3) It is divergent downward from the inner wall (see Fig. 2). Moreover, (54) is an inlet of the refrigerant liquid in the flow rate controller (47). In Fig. 2, (55) is the valve box (52).
The support fixed to the, (56) the shaft supporting the arm (50) so that the arm (50) can rotate, and (57) connecting the arm (50) and the stem (51). It is the axis.

Next, an example of the operation of the flow rate controller provided in this machine will be described together with the operation of the absorption heat pump device (hereinafter referred to as this machine) configured as described above.

In this machine, for example, waste steam of about 90 ° C from a chemical plant or other equipment (not shown) is supplied to the generator (1) and the evaporator (3), and cooling water of about 26 ° C is condensed.
About 13% of the water in the heated device (25) is supplied to the (2) and the heat generated when the absorbing liquid absorbs the refrigerant vapor in the absorber (4).
The temperature is raised to 3 ° C. and supplied to the load side (not shown). In the steady state of this operation example, the temperature and pressure in the gas phase part of the generator (1) and the condenser (2) are approximately 35 ° C and 42 mmHg.
Further, the temperature and pressure in the vapor phase part of the evaporator (3) and the absorber (4) are about 85 ° C. and 434 mmHg.
If the load, the heat energy of the waste steam, or the heat energy of the cooling water changes during operation, the amount of refrigerant vapor generated or condensed, or the amount of refrigerant absorbed by the absorbing liquid changes, and the condenser (2) or evaporation The pressure and temperature inside the device such as the device (3) also change, and the pressure difference between these devices also changes. Therefore, the amount of the refrigerant liquid sent from the condenser (2) to the evaporator (3) is changed by the pump (7), and the amount of the refrigerant liquid in the refrigerant liquid reservoir (39) of the condenser (2) is changed. Change.

The operation of the flow rate controller (47) when the amount of the refrigerant liquid in the refrigerant liquid reservoir (39) changes in this way will be described with reference to FIG.

When the amount of the refrigerant liquid in the refrigerant liquid reservoir (39) starts to decrease, the liquid surface starts to decrease, the float (46) moves downward, and the arm (50) rotates counterclockwise. Then, as the stem (51) moves downward, the valve body (49) descends in the direction of closing the outlet (48) of the valve box (52), and the gap between the inner wall of the sleeve (53) and the stem (51) widens. Along with that, the exit (48) becomes narrower. Therefore, of the refrigerant liquid sent to the valve box (52) through the inlet (54) by the pump (7), the refrigerant liquid that flows out from the outlet (48) and is sent to the evaporator (3) side The amount is reduced, and the amount of the refrigerant liquid returned to the refrigerant liquid reservoir (39) through the gap between the inner wall of the sleeve (53) and the stem (51) is increased. Therefore, it is possible to prevent a sharp decrease in the amount of the refrigerant liquid in the refrigerant liquid reservoir (39), it is not necessary to frequently start and stop the pump (7) unlike the conventional absorption heat pump device of this type, and , The amount of refrigerant liquid sent from the condenser (2) to the evaporator (3),
Unlike the conventional absorption heat pump device of this type in which the pump (7) is frequently started and stopped, it does not fluctuate significantly.

On the other hand, when the amount of refrigerant liquid in the refrigerant liquid reservoir (39) begins to increase, when the amount of refrigerant liquid in the float (46), arm (50), stem (51), valve body (49) begins to decrease. Reverse operation, refrigerant sump (39)
The sudden increase in the amount of refrigerant liquid in the inside is prevented so that the pump (7) is not frequently started and stopped.

(G) Effect of the Invention As described above, in the absorption heat pump device of this type according to the present invention, the stem interlocking with the float provided in the refrigerant liquid reservoir of the condenser is formed downwardly and divergently to move the stem vertically. Adjusts the size of the gap between the stem and the inner wall of the sleeve, which is the return port of the refrigerant liquid to the refrigerant liquid reservoir, and adjusts the width of the outlet of the refrigerant liquid. Since it is installed in the liquid reservoir, there is less risk of malfunction or malfunction than the conventional absorption heat pump device of this type equipped with an expensive control valve, controller and liquid level detector that operate with high accuracy, and a condenser The amount of the refrigerant liquid sent to the evaporator side can be adjusted almost surely according to the amount of the refrigerant liquid inside, and a sudden change in the amount of the refrigerant liquid sent to the evaporator side can be prevented at a low cost.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory view showing an embodiment of an absorption heat pump device of this type according to the present invention, and FIG. 2 is an enlarged description of a portion where a flow rate controller used in the absorption heat pump device of this type according to the present invention is arranged. It is a figure. (1) ... Generator, (2) ... Condenser, (3) ... Evaporator, (4) ... Absorber, (7) ... Pump, (11), (12), (13) ... Pipe, (39 ) ... Refrigerant reservoir, (46) ... Float, (47) ... Flow controller, (48) ... Outlet,
(49) ... valve body, (50) ... arm, (51) ... stem, (52) ... valve box, (53) ... sleeve, (54) ... outlet, (56), (57) ... shaft.

Claims (1)

[Claims] 1. A generator, a condenser, an evaporator, and an absorber for supplying a heat source fluid to a generator and an evaporator while flowing a cooling fluid to the condenser to extract a heated fluid having a temperature higher than the heat source fluid temperature from the absorber. In an absorption heat pump in which equipment such as a condenser is connected by piping, the inlet of the refrigerant liquid discharged from the refrigerant liquid reservoir of the condenser by the pump, the outlet of the refrigerant liquid to the evaporator side, and the refrigerant liquid reservoir of the condenser A valve mechanism that adjusts the width of the outlet of the refrigerant liquid to the evaporator side is provided in conjunction with the provided float, and the stem that connects the rotating arm attached to the float and the valve body is a valve. An absorption heat pump device, characterized in that a flow controller for a refrigerant liquid, which is formed so as to be divergent downward with respect to an inner wall of a sleeve attached to a box, is arranged in the refrigerant liquid in a refrigerant liquid reservoir of a condenser.