JPH05215440A - Absorption type heat pump device - Google Patents

Abstract

PURPOSE:To obtain an absorption type heat pump device, capable of obtaining cold heat utilizing heat and capable of being utilized as the absorption type heat pump device using water as a cooling means, while high in the capacity and efficiency. CONSTITUTION:The integrated part of an absorber and a condenser is constituted of a lamination type heat exchanger and is constructed by laminating multiple layers in the sequence of an absorbing liquid flow passage 11, a cooling water flow passage 12, a condensed refrigerant flow passage and the cooling water flow passage 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption heat pump device for obtaining cold heat by utilizing heat, and to an improvement of the absorption heat pump device using water as cooling means.

[0002]

2. Description of the Related Art The structure of a conventional absorption heat pump device is shown in FIG. The concentrated solution having a high refrigerant concentration, which is pressurized by the solution pump 1, recovers the absorbed heat in the absorber 2 and rises in temperature.
Further, the solution heat exchanger 3 receives the sensible heat of the dilute solution having a low refrigerant concentration flowing out from the generator 4, and raises the temperature. afterwards,
It is heated from the outside by the generator 4. The concentrated solution heated in the absorber 2, the solution heat exchanger 3, and the generator 4 generates a refrigerant vapor and flows into the rectifier 5 in a gas-liquid two-phase state. The rectifier 5 separates the gas and the liquid, and causes the refrigerant vapor to flow to the condenser 6 and the dilute solution with less refrigerant to flow to the solution heat exchanger 3. Here, since the refrigerant vapor contains not only the refrigerant but also the solvent vapor, the rectifier 5 liquefies the solvent vapor and supplies the refrigerant vapor with high purity to the condenser 6. The principle of rectification is to lower the temperature and liquefy the solvent having a high boiling point, and the heat generated at this time is recovered in the branched concentrated solution flowing from the upper part of the rectifier 5. The dilute solution discharged from the rectifier 5 gives its sensible heat to the concentrated solution by the solution heat exchanger 3 and is cooled to return to the absorber 2. On the other hand, the high-purity refrigerant vapor generated in the rectifier 5 flows out to the condenser 6,
It liquefies by discharging heat to the outside. After that, the pressure is reduced by the expansion valve 7 and the temperature becomes low to enter the evaporator 8, which receives heat from the outside to evaporate and returns to the absorber 2. In the absorber 2, the dilute solution returning from the solution heat exchanger 3 absorbs the refrigerant vapor, and part of the heat of absorption generated at that time is given to the concentrated solution, and the rest is discarded to the outside.

When the absorption heat pump is used for cooling or freezing, the cold heat of the evaporator 8 is used, and when it is used for heating or hot water supply, the exhaust heat of the condenser 6 and the absorber 2 is used. At this time, the cooling water flows so as to exchange heat with the absorber first and then with the condenser.

[0004]

However, in such a conventional absorption heat pump, since the condenser is cooled by cooling water having a relatively high temperature after cooling the absorber, the condensing pressure becomes large and the capacity and There is a problem of reduced efficiency.

An object of the present invention is to provide an absorption heat pump device having a large capacity and a high efficiency based on the above problems.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an absorber and a condenser so that a part of the absorption heat and a part or all of the condensation heat are exchanged with the same cooling water. It is a unity.

[0007]

The operation obtained by the above-mentioned structure or means is as follows.

Since it is possible to heat-exchange the absorber and the condenser with the cooling water of the lowest temperature at the same time, the pressure of the condenser can be reduced without increasing the temperature of the absorber, and the capacity and The efficiency can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an embodiment of the present invention and shows a cross section of an absorber and a condenser of an absorption heat pump device. The integrated portion of the absorber and the condenser is composed of a laminated heat exchanger, and the absorption liquid channel 11, the cooling water channel 12, the condensed refrigerant channel 13, and the cooling water channel 12 are laminated in this order. Therefore, all the cooling water channels 12 are located between the absorbing liquid channel 11 and the condensed refrigerant channel 13. FIG. 2 shows the configuration of the cooling water flow passage 12, in which the cooling water flowing from one header 15 flows along the flow passage 12 indicated by the shaded portion over almost the entire surface of the heat exchanger and flows out from the other header 15. To do. The flow path 12 is formed by etching. The shaded headers 16 and 17 correspond to the headers of the absorbing liquid and the condensed refrigerant, respectively.
Since the header 15 is located at a position different from the header 16 of the absorbing liquid and the header 17 of the condensed refrigerant, the fluids flow without being mixed. FIG. 3 shows the structure of the absorbent liquid flow path 11. The two-phase flow of the dilute solution and the refrigerant vapor flowing from one header 16 flows along the flow path 13 over almost the entire surface of the heat exchanger, and the other It flows out of the header 16. The condensed refrigerant flow path 13 is the absorption liquid flow path 11 in this embodiment.
I used the one created in the target form. By stacking a large number of such flow paths 11 to 13, it becomes possible to integrate the absorber and the condenser. Since the heat exchange between the fluids is performed on almost the entire surface of the heat exchanger, the heat transfer area is large.
A large amount of heat can be processed compactly. As a result of actual use, the condensation temperature could be lowered by 5 ° C. without changing the absorber temperature, and the capacity and efficiency could be increased to 10% or more. The cooling water outlet temperature at this time was the same as that of the conventional example, and it was not necessary to change the radiator. In the above description, an example in which the flow path is formed by etching has been described, but a laminated heat exchanger formed by pressing or the like can also obtain similar effects.

As described above, the present invention provides an absorption heat pump device having high capacity and efficiency.

FIG. 4 shows another embodiment of the present invention, showing a cross section of an absorber and a condenser of an absorption heat pump device. The integrated part of the absorber and the condenser is composed of a multi-tube heat exchanger, and the absorption liquid channel 2 is provided in the cooling water channel 21.
2. The condensed refrigerant flow path 23 is located. Therefore, the cooling water exchanges heat with both the absorbing liquid and the condensed refrigerant. Also in the result of actual use, it is confirmed that the value is almost equal to the characteristic shown in the first embodiment.

[0012]

As described above, in the absorption heat pump device according to the present invention, the absorber and the condenser are integrated so that part of the absorbed heat and part or all of the condensed heat are exchanged with the same cooling water. As a result, an absorption heat pump device with high capacity and efficiency can be realized.

[Brief description of drawings]

FIG. 1 is a sectional view of an absorber and a condenser of an absorption heat pump device according to an embodiment of the present invention.

FIG. 2 is a plan view of the cooling water channel.

FIG. 3 is a plan view of the absorption liquid channel.

FIG. 4 is a sectional view of an absorber and a condenser of an absorption heat pump device according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional absorption heat pump device.

[Explanation of symbols]

 12,21 Cooling water flow path 11,22 Absorbing liquid flow path 13,23 Condensing refrigerant flow path

Claims (3)

[Claims] 1. An absorption heat pump having an absorber, a generator, a condenser, and an evaporator, and an absorber so that part of the absorbed heat and part or all of the condensed heat are exchanged with the same cooling water. Absorption heat pump device with integrated condenser. 2. An absorption liquid, a cooling water, a condensed refrigerant,
The absorption heat pump device according to claim 1, wherein the absorber and the condenser are integrated by a laminated heat exchanger that secures a flow path in the order of cooling water. 3. The absorption heat pump device according to claim 1, wherein a pipe through which the absorbing liquid flows and a pipe through which the condensed refrigerant flows are installed in a pipe through which the cooling water flows to integrate the absorber and the condenser.