JPH0823456B2 - Absorption heat source device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to an absorption heat source device.

2. Description of the Related Art Conventionally, an absorption heat source device such as an absorption refrigerator or an absorption heat pump has an evaporator that evaporates a refrigerant (for example, water), and a refrigerant vapor that is evaporated by the evaporator as an absorbing liquid (bromination if it falls down). Lithium aqueous solution), an absorber, a regenerator that absorbs the refrigerant vapor in this absorber and heats the diluted absorption liquid that has become thin, and a refrigerant vapor that is heated in this regenerator and separated from the liquid. A condenser for condensing, a concentrated absorbent transfer pipe for sending the concentrated absorbent that has become thin due to the separation of the refrigerant vapor in the regenerator to the absorber, and a solution pump on the way It is composed of a rare absorbent transfer pipe for sending the absorbent to the regenerator. Then, in this configuration, for example, when performing a refrigeration cycle, evaporation of refrigerant → absorption → regeneration →
There was a cycle of condensation. Further, when performing the heating cycle, the regenerator is operated to guide the heat medium from the outside to the regenerator to heat it.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, according to the above-described conventional configuration, the absorption efficiency of the absorbing liquid is poor, and recently, it has been considered to use a surfactant in the absorbing liquid. However, in the above conventional configuration, when a surfactant is used, the boiling point of the surfactant is lower than that of the absorbing liquid, and therefore, when the absorbing liquid is heated by the regenerator,
First, the surfactant evaporates and enters the condenser, and is guided to the evaporator through the condenser, which causes a problem that the surfactant stays in the evaporator.

Therefore, an object of the present invention is to provide an absorption heat source device that can solve the above problems.

Means for Solving the Problems In order to solve the above problems, the absorption heat source device of the present invention is an evaporator that evaporates a refrigerant, and an absorber that absorbs the refrigerant vapor evaporated in the evaporator into an absorption liquid, A regenerator that absorbs the refrigerant vapor in this absorber and heats the diluted absorption liquid that has become thin, and a gas-liquid separator that separates the refrigerant vapor from the liquid in a gas-liquid mixed state that is heated in this regenerator, A condenser for condensing the refrigerant vapor separated by this gas-liquid separator, a concentrated absorbent transfer pipe for sending the concentrated absorbent that has become thicker due to the refrigerant vapor separated by the gas-liquid separator to the absorber, and on the way A rare absorbent transfer pipe having a solution pump for sending the diluted absorbent diluted in the absorber to the regenerator, and a refrigerant vapor transfer pipe for transferring the refrigerant vapor separated by the gas-liquid separator to the condenser. , Refrigerant liquid transfer for transferring the refrigerant liquid condensed in the condenser to the evaporator In the absorption heat source device having a pipe, a surfactant condenser for condensing the surfactant added to the absorbing liquid is provided in the middle of the refrigerant vapor transfer pipe, and in the middle of the rare absorbent transfer pipe, Via the heat transfer tube of the surfactant condenser,
A rare absorption liquid is used as a cooling heat source for condensation.

Operation According to the above configuration, since the surfactant condenser is provided in the refrigerant vapor transfer pipe that transfers the refrigerant vapor from the gas-liquid separator to the condenser, the surfactant is added to the absorbing liquid. But it is removed here. Therefore, it is possible to prevent the surfactant from staying in the evaporator or from being mixed into another heat medium introduced into the evaporator for heat exchange.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The absorption heat source device according to the present embodiment will be described as one used as an outdoor unit of a cooling and heating facility including an indoor unit and an outdoor unit, for example.

As shown in FIG. 1, this absorption heat source device evaporates a refrigerant and guides a heat source (for example, water) from an indoor unit (not shown) to perform heat exchange between the two, that is, to cool a heat medium. The evaporator 1 to be introduced and the refrigerant vapor evaporated in the evaporator 1 are introduced through the communication part (for example, communication pipe) 11 to use an absorbing liquid (for example, lithium bromide and improve its absorption efficiency). (For which a surfactant has been added in order to absorb it), a regenerator 3 that absorbs the refrigerant vapor in the absorber 2 and heats the dilute absorption liquid that has become thin, and this regenerator 3 A gas-liquid separator 4 that separates a refrigerant vapor and a surfactant vapor from a liquid in a gas-liquid mixed state that has been heated in step 1, and an air-cooled condenser 5 that condenses the refrigerant vapor separated in the gas-liquid separator 4. And refrigerant vapor and surfactant in the gas-liquid separator 4 The concentrated absorbent transfer pipe 12 for sending the concentrated absorbent, which has become thicker due to the separation of the vapor, to the absorber 2, and the solution pump 13 on the way, and the diluted absorbent thinned in the absorber 2 is supplied to the regenerator 3. The rare absorption liquid transfer pipe 14 to be sent, the refrigerant vapor transfer pipe 15 for transferring the refrigerant vapor and the surfactant vapor separated by the gas-liquid separator 4 to the condenser 5 side, and the refrigerant vapor transfer pipe 15 The rare absorbent transfer pipe 14 provided
A surfactant condenser 17 for condensing the vapor of the surfactant vaporized together with the refrigerant vapor by having a heat transfer tube 16 interposed on the way, and a refrigerant pump 18 on the way, and the condenser 5 A refrigerant liquid transfer pipe 19 for transferring the condensed refrigerant liquid to the evaporator 1, and a surfactant return pipe for returning the surfactant condensed in the surfactant condenser 17 into the concentrated absorbent absorbing pipe 12. 20 and a heat exchanger 21 provided between the concentrated absorption liquid transfer pipe 12 and the rare absorption liquid transfer pipe 14 for performing heat recovery by giving the heat of the concentrated absorption liquid to the rare absorption liquid. There is.

The heat exchanger 21 is arranged upstream of the connection point of the surfactant return pipe 20, and the connection point of the surfactant return pipe 20 to the concentrated absorbent transfer pipe 12 is heat exchange. vessel
It is said that the temperature is relatively lower on the downstream side than 21.

With the above configuration, for example, when the cooling operation is performed, the refrigerant vapor evaporated in the evaporator 1 is guided to the absorber 2 where it is efficiently absorbed by the absorbent to which the surfactant has been added.
The rare absorption liquid, which has absorbed the refrigerant vapor and becomes thin in concentration, is guided to the regenerator 3 and heated. In the regenerator 3, since the surfactant is also heated, the vapor of the surfactant is generated together with the refrigerant vapor. Therefore, the refrigerant vapor separated by the gas-liquid separator 4 also contains the vapor of the surfactant, and these vapors are guided into the surfactant condenser 17 where they are cooled by the rare absorption liquid. It In the surfactant condenser 17, as shown in FIG. 2, the refrigerant, that is, water is condensed at a temperature B point higher than the condensation point C. Therefore, the concentration of the surfactant at this time is A. It becomes a point, and the concentration of water becomes very thin. Therefore, the concentration of the surfactant becomes high, and the surfactant can be sufficiently recovered.

The refrigerant vapor from which the surfactant has been removed is condensed by the condenser 5
Enters inside and is condensed here to become a refrigerant liquid, and the refrigerant liquid transfer pipe
It is circulated and transferred to the evaporator 1 via 19. On the other hand, the surfactant condensed in the surfactant condenser 17 is mixed with the concentrated absorbent transfer pipe 12 from the gas-liquid separator 4 through the surfactant return pipe 20 and is circulated.

In this way, since the surfactant is recovered by the surfactant condenser 17, it is possible to prevent the surfactant from being mixed in the heat medium for heat exchange with the indoor unit as the operation proceeds, and the surfactant It is possible to prevent the concentration of the agent from decreasing.

Further, the heat recovery from the concentrated absorption liquid to the rare absorption liquid is performed after leaving the inside of the surfactant condenser 17, so that the condensation heat of the surfactant is not wasted, and therefore the thermal efficiency of the entire facility is improved. Can be improved.

As described above, according to the configuration of the present invention, since the surfactant condenser is provided in the middle of the refrigerant vapor transfer pipe that transfers the refrigerant vapor from the gas-liquid separator to the condenser, the surfactant is added to the absorbing liquid. Even if added, it is possible to prevent the surfactant from staying in the evaporator or from being mixed with other heat medium introduced into the evaporator for heat exchange. .

Further, since the rare absorption liquid is used as the cooling heat source of the surfactant condenser, the condensation effect is large as compared with the case where the condensation is not forcedly conducted.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a diagram showing a schematic configuration of an absorption heat source device, and FIG. 2 is a graph showing a boiling point curve of water and a condensation curve of a surfactant. 1 ... Evaporator, 2 ... Absorber, 3 ... Regenerator, 4 ... Gas-liquid separator, 5 ... Condenser, 12 ... Concentrated absorbent transfer pipe, 13 ...
… Solution pump, 14 …… Diluted absorption liquid transfer pipe, 15 …… Refrigerant vapor transfer pipe, 17 …… Surfactant condenser, 20 …… Surfactant return pipe, 21 …… Heat exchanger.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyuki Miyake 5-3 28 Nishi Kujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. (72) Takaharu Yagi 5-9, Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. 3-28 (72) Inventor Haruo Abe 5-3-8 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture (3) Hitachi Shipbuilding Co., Ltd. (72) Tetsuro Furukawa Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture 5-3 28 Hitachi Shipbuilding Co., Ltd. (72) Inventor Tatsuhiko Umeda Nishikojo 5-3 28 Nishikojo, Konohana-ku, Osaka City Osaka Prefecture (72) Inventor Takeshi Yano Konohana-ku, Osaka City, Osaka Prefecture Nishikujo 5-chome 3-28 Hitachi Shipbuilding Co., Ltd. (56) Reference JP-A-3-25258 (JP, A) JP-A 52-1552 (JP, A) JP-A 63-201460 (JP, A) )

Claims (1)

[Claims] 1. An evaporator for evaporating a refrigerant, an absorber for absorbing a refrigerant vapor evaporated by the evaporator into an absorbing liquid, and a rare absorbing liquid having a thin concentration by absorbing the refrigerant vapor by the absorber. A regenerator for heating, a gas-liquid separator for separating the refrigerant vapor from the liquid in a gas-liquid mixed state heated by the regenerator, and a condenser for condensing the refrigerant vapor separated by the gas-liquid separator, The concentrated absorbent transfer pipe that sends the concentrated absorbent that has become thicker due to the separation of the refrigerant vapor in the gas-liquid separator to the absorber and the solution pump in the middle to regenerate the diluted absorbent that has become thinner in the absorber. Absorption liquid transfer pipe for sending to the condenser, refrigerant vapor transfer pipe for transferring the refrigerant vapor separated by the gas-liquid separator to the condenser, and refrigerant for transferring the refrigerant liquid condensed by the condenser to the evaporator In an absorption heat source device equipped with a liquid transfer pipe, in the middle of the refrigerant vapor transfer pipe A surfactant condenser for condensing the surfactant added to the collected liquid is provided, and a heat transfer pipe of this surfactant condenser is provided in the middle of the dilute absorption liquid transfer pipe to cool it for condensation. An absorption type heat source device characterized by using a dilute absorption liquid as a heat source.