JPS6114429B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high temperature regenerator used in an absorption type air conditioner/heater.

A conventional absorption type air conditioner is disclosed in Japanese Patent Application Laid-open No. 10445/1983, and as shown in Figure 1,
Evaporator 1, absorber 2, condenser 3, low temperature regenerator 4,
high temperature regenerator, low temperature heat exchanger 6, high temperature heat exchanger 7,
Consists of a solution circulation pump 8, a solution spray pump 9, a refrigerant (water) spray pump 10, and a combustion chamber 11. During cooling operation, the combustion chamber 11 heats the solution in the high-temperature regenerator 5, and the evaporated refrigerant passes through the evaporator 12 for low-temperature regeneration. After heating the solution in the low temperature regenerator 4 by its latent heat of condensation, it is introduced into the condenser 3 via the valve 23.

The refrigerant evaporated in the low-temperature regenerator 4 is introduced into the condenser 3, where it is cooled by the cooling water flowing through the heat transfer tubes 15, condenses and liquefies, and is passed through the refrigerant conduit 35 and the valve 25.
The refrigerant is then introduced into the refrigerant tank 32. The introduced liquid refrigerant is sprayed into the evaporator 1 through the refrigerant spray nozzle 36 by the refrigerant spray pump 10, and is vaporized. The latent heat of evaporation generated at this time cools the cold water flowing through the heat transfer tubes 14 and exerts its refrigerating ability.

On the other hand, the solution in the high-temperature regenerator 5 releases refrigerant vapor and is concentrated to become a concentrated solution, which is introduced into the low-temperature heat exchanger 6 via the float chamber 16, the high-temperature heat exchanger 7, and the valve 22. Similarly, the solution in the low temperature regenerator 4 releases refrigerant vapor and is concentrated to become a concentrated solution, and this concentrated solution passes through the valve 20 to the low temperature heat exchanger 6.
The concentrated liquid from the high temperature regenerator 5 joins with the concentrated liquid. This combined concentrated solution is introduced into the concentrated liquid tank 33 due to the pressure difference and the head difference, and is then dispersed into the absorber 2 by the solution spray pump 9, absorbs the refrigerant vapor sent from the evaporator 1, and is diluted to form a diluted solution. becomes.

Since the absorber 2 is cooled by the cooling water flowing through the heat transfer tubes 15 and maintained at a low pressure, the evaporation temperature of the refrigerant (water) in the evaporator 1 is low. This low-temperature dilute solution accumulates in the dilute solution tank 34, and is further sent to the low-temperature heat exchanger 6 via the valve 19 by the solution circulation pump 8, where it is heat exchanged with the high-temperature concentrated solution. A portion of this solution passes through the valve 21 to the low temperature regenerator 4
After passing through a heat exchanger with the high temperature concentrated solution from the high temperature regenerator 5, the liquid is introduced into the gas phase of the high temperature regenerator 5 through the valve 18 and the diluted liquid conduit 27. Cooling operation is performed in this way.

The amount of solution in the high temperature regenerator 5 is the same as that in the float chamber 16.
A valve 18 is opened and closed by the vertical movement of the float 17.
The injection volume is kept constant by controlling the injection volume via . Also, the tip of the diluted liquid conduit 27 is connected to the high temperature regenerator 5.
, so that if the circulation pump 8 suddenly stops, the steam from the high-temperature regenerator 5 will flow back through the diluted liquid conduit 27 . On the other hand, since the solution in the high temperature regenerator 5 is retained up to the weir 37, even if the solution flows back to the absorber 2 on the low pressure side, there is no problem of overflowing from the absorber to the refrigerant tank 32.

Next, during heating operation, first valves 19 to 23, 25
At the same time, the valve 24 is opened and the refrigerant pump 10 is closed.
is driven to send the refrigerant in the refrigerant tank 32 to the condenser 3, and after causing the refrigerant to overflow from the condenser 3 to the low temperature regenerator 4, the valve 24 is closed. Since the bottom of the low-temperature regenerator 4 and the concentrated solution outflow pipe 37 are communicated via a small-diameter pipe 38, the solution in the low-temperature regenerator 4 flows out within several hours after the cooling operation is stopped.

Next, when the combustor 11 is operated, the solution in the high temperature regenerator 5 boils, and the refrigerant vapor generated by this boiling flows through the mist separator 30 and the slit 31.
After flowing into the evaporation tube 12 in the low-temperature regenerator 4 and being liquefied, it passes through the U-shaped seal 13 and is returned to the high-temperature regenerator 5 through the head chamber.

In this case, the liquid refrigerant in the low-temperature regenerator 4 is heated by refrigerant vapor from the high-temperature regenerator 5, boils and evaporates, and is condensed and liquefied by the cooling water flowing through the heat transfer tube 15 of the condenser 3. It later overflows into the low temperature regenerator 4. The hot water flowing through the heat transfer tubes 15 is used for heating.

When switching from cooling operation to heating operation as described above,
In order to maintain a sufficient amount of refrigerant in the low-temperature regenerator 4, the amount of refrigerant from the refrigerant tank 32 alone is insufficient. Therefore, when heating starts, the valve 23 is opened and the condenser 3
It is necessary to supply refrigerant to the low-temperature regenerator 4 through .

Although the solution in the high temperature regenerator 5 becomes highly concentrated due to this refrigerant replenishment, it is necessary to make the lithium salt concentration of this solution sufficiently uniform.

When diluting the solution in the high temperature regenerator 5 after cooling operation, the heating of the combustor 11 is stopped and the solution is diluted.
A solution with a high concentration of lithium salt and a high density stays in the tank 9, and the dilute solution with a low density that flows in flows near the liquid surface and may hardly be diluted.

In addition, the low temperature and high density dilute solution introduced into the high temperature regenerator 5 during cooling operation is scattered onto the water pipe section 29, and a gas-liquid mixed flow rises from the water pipe section 29 side due to intense boiling, and the two collide. This may impede the convection of the solution within the high temperature regenerator 5.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high-temperature regenerator for an absorption type water chiller-heater that can improve the mixing of the solution supplied into the high-temperature regenerator and the solution inside the vessel.

A feature of the present invention is that the conduit that supplies the solution to the high-temperature regenerator has two openings into the vessel, one of which opens into the gas phase and the other into the liquid phase. be.

With the above configuration, the solution supplied to the high-temperature regenerator flows into the convection of the solution in the vessel, so the solution in the vessel and the solution supplied from the conduit are smoothly mixed, and the solution concentration is made uniform. is promoted.

The closer the position of the other opening of the conduit is to the bottom, the greater the effect.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, 5 is a high-temperature regenerator, 11 is a combustion chamber that heats a water pipe section 29 provided at the bottom of the high-temperature regenerator 5, and 12 is a low-temperature regenerator (not shown) connected to the high-temperature regenerator 5. ), 16
is a float chamber formed integrally with the high temperature regenerator 5,
17 is a float floating in the float chamber 16;
8 is connected to the float 17 and the high temperature regenerator 5
This is a valve installed in the middle of the diluted liquid conduit 27 inserted into the interior, and the tip of the diluted liquid conduit 27 is bifurcated 27.
It is branched into a and 27b. One of the branch pipes 27a is opened to the gas phase part 5a in the high temperature regenerator 5, and the other branch pipe 27b is opened to the bottom part 5b of the high temperature regenerator 5. A diaphragm 28 is provided. 30,
Reference numerals 31 denote a mist separator and a slit provided in the middle and upper parts of the high temperature regenerator 5, respectively.

Since this embodiment is configured as described above, the diluted liquid is introduced into the bottom part 5b of the high temperature regenerator 5 through the branch pipe 27b at the tip of the diluted liquid conduit 27, so that the convection of the solution in the high temperature regenerator 5 is prevented. It will be further strengthened. Further, even when the combustor 11 is stopped, the inside of the high-temperature regenerator 5 is stirred from the bottom, so that the concentration of the solution is made uniform.

Furthermore, the branch pipe 27a at the tip of the diluted liquid introduction pipe is opened to the gas phase part 5a of the high temperature regenerator 5, and a throttle 28 is provided in this opening, so even if the cooling circulation pump 8 suddenly stops, high temperature regeneration can be carried out. It is possible to prevent the solution in the container 5 from overflowing into the absorber 2.

Note that even if the solution in the high-temperature regenerator 5 crystallizes, the crystals can be quickly decomposed by force-feeding the diluted liquid to the bottom 5b of the high-temperature regenerator 5 via the branch pipe 27b of the diluted liquid conduit 27. I can do it.

As described above, according to the present invention, it is possible to improve the mixing of the solution supplied into the high-temperature regenerator and the solution inside the vessel, and to promote uniformity of the solution concentration in the high-temperature regenerator.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional absorption refrigerating machine, and FIG. 2 is a sectional view showing an embodiment of the high temperature regenerator of the present invention. 5... High temperature regenerator, 5a... Gas phase part, 5b... Bottom part,
27... Dilute liquid conduit, 27a, 27b... Branch pipe.

Claims (1)

[Claims] 1. In a device that is equipped with a heating section and has a conduit for supplying a solution into the vessel and a discharge port for discharging the solution from the inside of the vessel, the opening of the conduit for supplying the solution into the vessel into the vessel. 1. A high-temperature regenerator for an absorption type air-conditioning/heating machine, characterized in that there are two openings, one of which opens into a gas phase within the vessel, and the other opens into a liquid phase within the vessel. 2. The high-temperature regenerator in an absorption type air-conditioning/heating machine according to claim 1, wherein the other opening of the conduit is opened at the bottom of the vessel. 3. The high-temperature regenerator in an absorption type air-conditioning/heating machine according to claim 1 or 2, wherein one opening of the conduit has a restriction.