JP2875614B2 - Air cooling absorption air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air-cooling absorption air conditioner, and more particularly, to a heat exchange temperature by disposing a heat-substance exchange device in a solution flow path between an air-cooling absorber and a regenerator. The present invention relates to an air-cooling absorption cooling / heating machine suitable for increasing the difference.

[Conventional technology]

2. Description of the Related Art In recent years, an absorption-type air conditioner has attracted attention as an air-conditioning heat source device that does not use Freon gas.

Conventional devices include, for example, as described in JP-A-62-202972, a high-temperature regenerator that heats an absorbing solution with an external heat source to generate and concentrate refrigerant vapor, and uses the heat of condensation of the generated refrigerant vapor as a heat source. A low-temperature regenerator that heats the absorption solution to generate refrigerant vapor and concentrates it, an air-cooled condenser that cools the refrigerant vapor generated by the low-temperature regenerator with air to condense and liquefy, and evaporates the liquid refrigerant generated by the air-cooled condenser Evaporator, air-cooled absorber that absorbs the refrigerant vapor generated by the evaporator into the rich absorbent guided from the high-temperature regenerator or low-temperature regenerator and cools it with air, and the high-temperature concentrated solution from the high-temperature regenerator and low-temperature regenerator A low-temperature heat exchanger and a high-temperature heat exchanger that exchange heat with the low-temperature dilute solution generated by the air-cooled absorber, an air-cooled fan that sends cooling air to the air-cooled absorber and the air-cooled condenser, a solution pump that circulates the solution, and a refrigerant It was composed of a refrigerant pump for circulating.

Here, during cooling, the cold water flowing in the heat transfer tube group of the evaporator is cooled by the latent heat of evaporation of the refrigerant flowing down on the heat transfer tube group, thereby obtaining the cooling capacity. During heating, the high-temperature refrigerant vapor generated in the high-temperature regenerator is guided to a hot water heat exchanger and concentrated to heat the hot water flowing in the heat transfer tube group, thereby obtaining a heating capacity.

In this case, in order to configure an air-cooled absorption refrigeration cycle that can perform cooling operation without exceeding the concentration that does not solidify and the atmospheric pressure, it was necessary to make the absorbent concentration of the outlet solution of the air-cooled absorber as low as that of the water cooler. . In particular, the air-cooled absorber is composed of a plurality of absorption units, and the heat exchange with the cooling air is performed by the relatively low-temperature air at the inlet side of the low-temperature, low-concentration absorption unit near the solution outlet of the air-cooled absorber. The cooling unit at the outlet side cools the absorption unit having a relatively high-temperature and high-concentration solution flowing into the air-cooled absorber. In this way, using the air-cooled absorber composed of a plurality of units, a multi-pass orthogonal countercurrent heat exchange cycle utilizing the difference in the refrigerant vapor pressure equilibrium temperature depending on the concentration of the cooling air and the solution is formed, and the cooling air is cooled. By increasing the temperature efficiency by bringing the heat exchange between the water and the absorbent close to the ideal countercurrent heat exchange,
Air cooling of a lithium bromide double effect absorption refrigeration cycle was realized. As described above, the solution having a low absorbent concentration was generated in the air-cooled absorber at all times during the cycle.

[Problems to be solved by the invention]

The above prior art is suitable for improving the heat exchange temperature efficiency between the cooling air and the absorbing solution, but does not take into consideration the increase in the heat exchange temperature difference itself, and the heat transfer area of the air-cooled absorber 5 is reduced. There was a problem of being large.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and has been made to increase the heat exchange temperature difference between the cooling air and the absorbing solution, to make the air-cooled absorber compact and compact, and to reduce the inlet / outlet temperature of the cooling air. It is an object of the present invention to provide a low-noise air-cooling absorption air conditioner that can reduce the amount of cooling air by increasing the difference.

Another object of the present invention is to provide an air-cooled absorption air conditioner having corrosion resistance by lowering the operating temperature and the absorbent concentration of the high-temperature regenerator.

[Means for solving the problem]

In order to achieve the above object, the configuration of the air-cooling absorption cooling / heating machine according to the present invention includes a high-temperature regenerator, a low-temperature regenerator, an air-cooled condenser, an evaporator, an air-cooling absorber, a high-temperature heat exchanger, a low-temperature heat exchanger, and a solution. A pump, a refrigerant pump, and an air-cooling absorption air-conditioner including a piping system for operatively connecting the pump and the refrigerant, and a regeneration chamber that guides the concentrated solution returned from the high-temperature regenerator or the low-temperature regenerator to the air-cooled absorber and flash-evaporates; An absorption / regeneration chamber unit is configured by arranging an absorption chamber for absorbing the flash evaporated refrigerant vapor in the dilute solution generated by the air-cooled absorber via a solution removing means, and forming an absorption / regeneration chamber unit. Are arranged in a plurality of stages, the first stage being connected to an air-cooled absorber, the last stage being provided with a piping system connected to the regenerator side, and each stage of the regeneration chamber in the multi-stage absorption / regeneration chamber unit is provided with a solution. Spraying means; A gas-liquid interface area enlarging means in which a plurality of stages of corrugated or saw-tooth shaped net-like fillers are arranged alternately below the solution spraying means and provided with openings in the horizontal direction; And connected to either the solution spraying means or the air-cooled absorber of the next-stage regeneration chamber via a solution pump.

Similarly, in each stage of the absorption chamber in the multiple-stage absorption / regeneration chamber unit, the solution spraying means and the corrugated or sawtooth-shaped net-like packing are alternately arranged below the solution spraying means. And a gas-liquid interface area enlarging means provided with an opening in the horizontal direction, connected to the opposite regeneration chamber via the droplet removing means, and spraying the solution in the next absorption chamber via the solution pump. Means or connected to either a low temperature heat exchanger or a high temperature heat exchanger.

More specifically, FIG. 1 and FIG.
This will be described with reference to the drawings.

That is, the technical means for achieving the above-mentioned object is that the dilute solution generated in the air-cooled absorber 5 is returned to the air-cooled absorber 5 from the high-temperature regenerator 1 or the low-temperature regenerator 2. Alternatively, a heat-substance exchange device 14 is disposed in the middle of the flow path for sending to the low-temperature regenerator 2, and the refrigerant vapor is generated from the concentrated solution and absorbed in the dilute solution.

Here, the heat and mass exchange device 14 is generated in the regeneration chamber 15 for generating refrigerant vapor from the concentrated solution, the absorption chamber 16 for guiding and absorbing the refrigerant vapor generated in the regeneration chamber 15 to the dilute solution, and generated in the regeneration chamber 15. Means for guiding the refrigerant vapor to the absorption chamber 16. Also, a plurality of sets of the regeneration chamber 15 and the absorption chamber 16 are provided.

Here, the regenerating chamber 15 is a concentrated solution spraying means 18, a gas-liquid interface area enlarging means 19, a droplet removing means 20 for preventing the solution mist from flowing to the absorption chamber, and the generated concentrated solution is supplied to the next regenerating chamber or It comprises a concentrated solution pump 21 relating to a solution transport means for sending to the air-cooled absorber 5.

In addition, the absorption chamber includes a dilute solution spraying unit 22, a gas-liquid interface area enlarging unit 23, a droplet removing unit 24 for preventing the solution mist from flowing to the regenerating chamber, Diluent pump 25 and a bleeding means 26 for the absorption chamber 16 and a communication pipe 30 and an absorption chamber 16 which constitute liquid level control means for the regeneration chamber 15.
Of the liquid level control means.

[Action]

The function of the above technical means is described in the first embodiment, which will be described later in the first embodiment.
This will be specifically described with reference to FIGS.

The concentrated solution returning from the high-temperature regenerator 1 or the low-temperature regenerator 2 to the air-cooled absorber 5 has a high temperature, a high concentration, and a high refrigerant vapor pressure. On the other hand, the dilute solution generated by the air-cooled absorber 5 has a low temperature, a low concentration, and a low refrigerant vapor pressure. The heat-substance exchange device 14 uses this refrigerant-vapor pressure difference to move refrigerant vapor from a concentrated solution to a dilute solution to perform heat-substance exchange. That is, the concentrated solution returning from the high-temperature regenerator 1 or the low-temperature regenerator 2 to the air-cooled absorber 5 is guided to the regeneration chamber 15 of the heat-substance exchanger 14 to generate refrigerant vapor, while the dilute solution generated by the air-cooled absorber 5 is generated. Is introduced into the absorption chamber 16 of the heat and mass exchange device 14 to absorb the refrigerant vapor. As a result, the concentrated solution returning from the high-temperature regenerator 1 or the low-temperature regenerator 2 to the air-cooled absorber 5 generates refrigerant vapor in the heat-substance exchanger 14, is concentrated, and is guided to the air-cooled absorber 5. Conversely, the dilute solution generated in the air-cooled absorber 5 absorbs the refrigerant vapor in the heat-substance exchanger 14, is diluted and sent to the high-temperature regenerator 1 or the low-temperature regenerator 2.

As described above, the solution whose absorbent concentration is lower than the solution outlet concentration of the air-cooled absorber 5 is supplied to the high-temperature regenerator 1 or the low-temperature regenerator 2.
And the high-temperature regenerator 1 or the low-temperature regenerator 2 can be operated at the same operating temperature and concentration even if the absorbent concentration of the outlet solution of the air-cooled absorber 5 is higher than in the prior art. That is, only the air-cooled absorber 5 of the absorption refrigeration cycle can be operated at a higher temperature and a higher concentration than in the prior art, and the difference in heat exchange temperature with the cooling air can be increased.

The high-temperature solution is dispersed and sprayed into the regeneration chamber 15 by the concentrated solution spraying means 18 arranged above the regeneration chamber 15. As a result, the solution is quickly concentrated to the equilibrium pressure in the apparatus.

If the gas-liquid interface area enlarging means 19 makes the droplets too fine, it flows out into the absorption chamber 16 accompanying the refrigerant vapor flow, so that the solution is spread on, for example, a wire or a wire net or a plastic thread or net, The gas-liquid interface is enlarged to promote the generation of the refrigerant and prevent the solution from being carried over. The droplet removing means 20 prevents carryover of the solution.

When the solution transport means uses the head difference between the positions, a U-shaped liquid seal is required between the regeneration chambers. Concentrated solution pump 21
If U is used, a U-shaped liquid seal is inevitably formed due to the relationship of NPSH, and the pressure difference between the regeneration chambers is maintained.

In addition, the liquid seal is, for example, a part that forms a pool of liquid in a tube so as not to communicate on both sides of the pool of liquid. Here, the U-shaped liquid seal is formed by bending a pipe into a U-shape to put the liquid into the pipe, and to prevent communication on both sides of a portion where the liquid is stored.

Also, here, NPSH (abbreviation of Net Positive Suction Head) refers to the indentation head of the pump and corresponds to the liquid depth for applying a positive pressure so that cavitation does not occur due to the negative pressure generated by the impeller of the pump. I do.

On the other hand, a low-temperature dilute solution is introduced into the absorption chamber 16 by the dilute solution spraying means 22, and absorbs refrigerant vapor from the regeneration chamber 15 to increase the temperature and decrease the concentration. The gas-liquid interface area enlarging means 23 makes the droplets finer or spreads out into the packing material to make it easier to absorb the refrigerant vapor. Droplet removing means
Numeral 24 denotes a device for preventing the rebound of the dilute solution from flowing out into the regeneration chamber 15. By laying a wire mesh or the like below the absorption chamber 16, the generation of droplets due to rebound can be considerably prevented.

When the solution transport means uses the head difference between the positions, a U-shaped liquid seal is required between the absorption chambers. Dilute solution pump 25
If U is used, a U-shaped liquid seal is inevitably formed from the relationship of NPSH, and the pressure difference between the absorption chambers is maintained.

Finally, the communication pipe 30 and the partition 31 function to prevent overflow of each regeneration chamber and overflow of the absorption chamber, so that an excessive amount of solution stays in the heat-material exchange device 14 and a cycle cannot be formed. Acts to prevent.

Here, paying attention to the air-cooled absorber 5, the air-cooled absorber 5
Heat exchanges with the cooling air at the refrigerant evaporation pressure equilibrium temperature of the evaporator 4. Therefore, if the concentration of the absorbent at the outlet of the air-cooled absorber 5 is increased by, for example, 1% by the heat-substance exchange device 14, the pressure balance of the absorbing liquid The temperature is about 1.8K higher in aqueous lithium bromide solution. The heat exchange temperature difference between the cooling air and the cooling air is about 5K because the temperature of the solution at the outlet of the absorber is about 40 ° C and the temperature of the inlet of the cooling air is about 35 ° C. By implementing the present invention in this way, the temperature of the solution at the outlet of the absorber can be increased to about 41.8 ° C., so that the heat exchange temperature difference is about 6.8 K, and if the same heat transfer rate is obtained, the air-cooled absorber 5 is approximately 5 / 6.8 = 0.73, about 2
7% smaller. When a heat transfer tube for absorption in a vertical pipe is used for the air-cooled absorber 5, the result is that the heat transfer coefficient increases as the liquid film flow rate per unit width increases, and the liquid film flow rate increases due to miniaturization. Therefore, there is an effect that the heat transmission rate is increased, and the effect of downsizing and performance enhancement that is significantly larger than the calculated value of 27% can be obtained.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 10.

FIG. 1 is a cycle system diagram of an air-cooling absorption air conditioner according to one embodiment of the present invention, FIG. 2 is a configuration diagram of a heat-substance exchange device of FIG. 1, and FIG. FIG. 4 is a partial perspective view showing the configuration of the filler.

The air-cooling absorption air conditioner shown in FIG. 1 heats an absorption solution to generate a refrigerant vapor and concentrates the refrigerant, and heats the absorption solution using heat of condensation of the refrigerant vapor generated in the high temperature regenerator 1 as a heat source. Low-temperature regenerator 2 for generating and condensing refrigerant vapor by cooling, air-cooled condenser 3 for cooling and condensing and liquefying refrigerant vapor generated in low-temperature regenerator 2 with air, and evaporating liquid refrigerant generated in air-cooled condenser 3 , An air-cooled absorber 5 that absorbs the refrigerant vapor generated in the evaporator 4 into a thick absorbent and cools the air with air, a hot-material exchanger 14 to which the dilute solution generated by the air-cooled absorber 5 is guided, and a concentrated solution. The low-temperature heat exchanger 6 for exchanging heat of the dilute solution, the high-temperature heat exchanger 7 for exchanging heat between the concentrated solution generated by the high-temperature regenerator 1 and the dilute solution flowing into the high-temperature regenerator 1, and cooling air to the air-cooled absorber 5 Send air cooled Juan 8a,
And an air-cooled fan 8b for sending cooling air to the air-cooled condenser 3, solution pumps 9a and 9b for circulating the solution in the air-cooled absorber 5, and a refrigerant pump 10 for sending the refrigerant generated in the air-cooled condenser 3 to the flash evaporation chamber 27. Have been.

During cooling, the cold water 11 flowing in the heat transfer tube group of the evaporator 4 is cooled by the latent heat of evaporation of the refrigerant flowing down on the heat transfer tube group, thereby obtaining a cooling capacity.

At the time of heating, the high-temperature refrigerant vapor generated in the high-temperature regenerator 1 is guided to the hot water heat exchanger 12 to be condensed and heat the hot water 13 flowing in the heat transfer tube group, thereby obtaining the heating capacity. is there.

Here, the refrigerant generated in the air-cooled condenser 3 is sent to the flash evaporation chamber 27 via the pipe 50 by the refrigerant pump 10, and the liquid refrigerant is guided from the flash evaporation chamber 27 to the evaporator 4 via the pipe 52. The generated refrigerant vapor is guided to the thermal mass exchanger 14 by the refrigerant flow path 51.

Here, the air-cooled absorber 5 is composed of two blocks, and the concentrated solution is guided to the absorber 5a near the cooling air outlet to absorb the refrigerant vapor generated in the evaporator 4 and to be cooled and slightly absorbed. A liquid is generated, and this solution is sent to the absorber 5b on the side near the cooling air inlet by the solution pump 9a and cooled, and absorbs refrigerant vapor to generate a dilute solution at the outlet of the air-cooled absorber 5.

Next, with reference to FIG. 2, the heat mass exchange device 14 relating to the heat mass transfer means will be described in detail.

The heat and mass exchange device 14 comprises a plurality of sets (three sets in this example) of absorption / regeneration chamber units 14A, 14B, 14C.

The absorption / regeneration unit (14A, 14B, 14C) is composed of a regeneration chamber 15 (collectively 15a, 15b, and 15c) for conducting a concentrated solution from the regenerator to the air-cooled absorber 5 and flash-evaporating the concentrated solution. An absorption chamber 16 (general term for 16a, 16b, 16c) for absorbing the flash evaporated refrigerant vapor into the dilute solution generated by the absorber 5 is
They are arranged so as to face each other via the solution removing means 20, 24 (eliminator), and a refrigerant vapor flow path is secured.

The regeneration chambers 15a, 15b, 15c of each stage in the absorption / regeneration chamber units 14A, 14B, 14C are provided with concentrated solution spraying means 18 (18a, 18b, 18c) made of a punching plate above the regeneration chamber 15.
Is disposed under the gas-liquid interface area expanding means 19.
Is filled.

As shown in FIG. 4, the packing for expanding the gas-liquid interface area has a corrugated net-like packing 19a, a saw-tooth packing 19b, etc., which are arranged alternately in a plurality of stages, in a vapor flow direction (horizontal direction) indicated by an arrow. An opening is provided to secure a refrigerant vapor flow path.

Such a regeneration chamber 15 is connected to the absorption chamber 16 which is opposed via a droplet removing means 20, that is, an eliminator.

A concentrated solution pump 21 (21a, 21b, 21c) as a concentrated solution transport means to the next stage is provided below the regeneration chambers 15a, 15b, 15c of each stage.

On the other hand, in each of the absorption chambers 16a, 16b, 16c of the absorption / regeneration chamber units 14A, 14B, 14C, a dilute solution spraying means 22 (22a, 22b, 22c) is disposed above the absorption chamber 16. Below this, a gas-liquid interface area enlarging means 23 is filled.

Like the packing in the regeneration chamber, the packing for expanding the gas-liquid interface area has a net-like packing shaped like a corrugated or saw-toothed shape, which is alternately arranged in a plurality of stages, and has an opening in the horizontal direction.

Such an absorption chamber 16 is connected to the opposing regeneration chamber 15 via a droplet removing means 24 for preventing the solution mist from flowing to the regeneration chamber 15, that is, an eliminator.

A dilute solution pump 25 (25a, 25b, 25c) as a dilute solution transport means to the next stage is disposed below the absorption chambers 16a, 16b, 16c of each stage.

The operation around the heat and mass exchange device 14 and the liquid level control will be described.

The dilute solution generated by the air-cooled absorber 5 is sent from the absorber 5b to the absorption chamber 16a of the first-stage absorption / regeneration unit 14A of the heat-substance exchange unit 14 by the container pump 9b and the pipe 40 from the absorber 5b, and the diluted solution spraying means 22a. It is sprayed on the liquid interface area enlarging means 23. The dilute solution is sent to the absorption chamber 16b of the next stage by the dilute solution pump 25a, and further similarly sent to the absorption chamber 16c of the next stage (final stage) by the dilute solution pump 25b. It is sent to the regenerator side by 41. In other words, the dilute solution
One is sent to the low-temperature regenerator 2 via the pipe 41b, and the other is sent to the high-temperature regenerator 1 via the high-temperature heat exchanger 7 via the pipe 41a.

The solution in the high-temperature regenerator 1 is heated and concentrated by an external heat source, guided to the high-temperature heat exchanger 7 by the pipe 42a to exchange heat with the dilute solution, and is piped together with the concentrated solution guided from the low-temperature regenerator 2 by the pipe 42b. After passing through 42, it is sent to the absorption / regeneration unit 14C at the final stage of the thermal mass exchange device 14. That is, the concentrated solution is guided to the regeneration chamber 15c, and is sprayed from the concentrated solution spraying means 18c to the gas-liquid interface expanding means 19. Therefore, the concentrated solution evaporates the refrigerant vapor by its own thermal energy, and the solution itself is concentrated as the temperature decreases, and the concentrated solution pump
It is sent to the next regeneration room 15b by 21c. In addition, reproduction room 15c
Is generated in the absorption chamber 16c and is absorbed by the dilute solution. In the regeneration chamber 15b, the refrigerant vapor is evaporated at a lower pressure than the regeneration chamber 15c by its own thermal energy, so that the solution itself decreases in temperature and is concentrated, and the concentrated solution pump is concentrated.
It is sent to the next regeneration room 15a by 21b. The regeneration room 15b
The refrigerant vapor generated in the above is guided to the absorption chamber 16b and is absorbed by the dilute solution.

In the regeneration chamber 15a, the refrigerant vapor is evaporated by its own thermal energy at a lower pressure than the regeneration chamber 15b, so that the solution itself is reduced in temperature and concentrated, and the concentrated solution pump 21a and piping
43, the absorber 5a which is a high-temperature side block of the air-cooled absorber 5
Is led to.

The refrigerant vapor generated in the regeneration chamber 15a is guided to the absorption chamber 16a and is absorbed by the dilute solution. Further, the refrigerant vapor evaporated by the flash evaporator 27 is also supplied to the absorption chamber 16a, and is absorbed by the dilute solution. Therefore, the evaporator 4 includes the air-cooled condenser 3
Since the liquid refrigerant having a lower temperature than the liquid refrigerant generated in the step (1) is supplied and the amount of refrigerant absorbed by the air-cooled absorber 5 can be reduced and the heat load can be reduced, there is an effect that the efficiency of the air-cooled absorber 5 can be increased.

Further, the non-condensable gas is extracted from the absorption chamber 16c to the absorption chamber 16b via the bleed pipe 26c, and the bleed pipe 26b is extracted from the absorption chamber 16b.
The non-condensable gas is bled into the absorption chamber 16a via the. Further, an automatic bleeding device is connected to the bleeding pipe 26a from the absorption chamber 16a.
The air is bled and collected at 28 and is automatically discharged out of the machine by an exhaust device (not shown). Therefore, there is an effect that the non-condensable gas in the vessel can be efficiently exhausted, the mass transfer efficiency of the apparatus can be maintained high, and the solution circulation can be smoothly performed.

As described above, the concentrated solution spraying means 18 is provided above each regeneration chamber.
Is disposed, and a hot and thick solution is provided through a punch hole for spraying.
Since it is sprayed on and has a large surface area, refrigerant vapor is generated efficiently.

In addition, since a wire mesh that is bent in a corrugated or saw-tooth shape is arranged in the filler, the dropped droplets are prevented from flowing into the absorption chamber 16 as fine droplets.

In addition, even if there is no filling material, refrigerant vapor is quickly generated even if it is made into a droplet.

Each absorption / regeneration room unit 14A, 14B, 14C
The connection is made at 0 (collectively 30b and 30c), and the liquid level in the regeneration chamber 15 is controlled.

The lower part of the regeneration chamber 15a and the gas phase of the regeneration chamber 15b are connected by a communication pipe 30b via a U-shaped liquid seal, and the lower part of the regeneration chamber 15b and the gas phase of the regeneration chamber 15c form a U-shaped liquid seal. Through the communication pipe 3
Connected at 0c. When the liquid level in the regeneration chamber 15c rises, it is sent to the next-stage regeneration chamber 15b via the communication pipe 30c.

Although not shown, the lower part of the air-cooled absorber 5a and the regeneration chamber 15
It is desirable to connect a with a communication pipe via a U-shaped liquid seal. With such a configuration, an excessive amount of the concentrated solution does not stay in the regeneration chamber 15.

For example, since the flow path of the communication pipe 30 can be ensured even when the piping is solidified, there is an advantage that the cycle can be continued without flowing the concentrated solution into the dilute solution side. When the concentrated solution flows into the dilute solution, the concentration of the solution in the high-temperature regenerator 1 and the low-temperature regenerator 2 in the cycle becomes particularly high, and the operating pressure and operating temperature increase, which may cause a serious failure. is there.

Next, regarding the dilute solution system, in this embodiment, the regeneration chamber 15 is used.
In the lower part of the absorption chamber 16, a partition 31 (general term for 31 a, 31 b, 31 c) related to the liquid level control means prevents the solution from flowing. When the liquid level in the absorption chamber 16 rises, the dilute solution overflows the partition 31 and flows into the regeneration chamber 15. In this case, the opening of the regeneration chamber 15 of the communication pipe 30 is located at a position lower than the partition 31. As described above, the reproduction room 15a,
The liquid levels of 15b, 15c and the absorption chambers 16a, 16b, 16c can be balanced.

The smaller the depth of the absorption chamber 16 and the regeneration chamber 15 in the flow direction of the refrigerant vapor, the smaller the pressure loss and the higher the efficiency. Therefore, the absorption chamber 16 and the regeneration chamber 15 are formed in a rectangular parallelepiped shape, and there is a merit that the cost can be reduced by integrally manufacturing a plurality of absorption / regeneration units. Alternatively, it may be configured in a concentric cylindrical shape in which the absorption chamber 16 is arranged around the regeneration chamber 15, or the regeneration chamber 15 may be arranged in a concentric cylinder shape surrounding the absorption chamber 16.

Next, the cycle system of this embodiment will be described with reference to a dueling diagram shown in FIG. The cycle is constructed clockwise. The symbols in the figure correspond to the respective devices, and a, b, and c indicate the operating pressure of each stage regeneration / absorption chamber unit.

As shown in the figure, the dilute solution in the absorber 5 absorbs the refrigerant vapor in the absorption chamber 16, and the dilute solution gradually increases in pressure from a to b,
The diluted solution which is diluted as high as c and is produced in the absorption chamber 16 becomes thinner than that of the absorber 5.

On the other hand, the concentrated solution generated in the regeneration chamber 15 is supplied to the low-temperature regenerator 2
A concentrated solution that is thicker than the mixture of the concentrated solution generated in the high-temperature regenerator 1 and the concentrated solution is supplied to the absorber 5.
Thus, in the cycle, the high temperature regenerator 1 and the low temperature regenerator 2 shift to the left side, that is, the low temperature side, and the absorber 5 side shifts to the right side, that is, the high temperature side. As a result, the heat exchange temperature difference with the cooling air as the cooling medium can be increased on the side of the absorber 5 at the heat radiating point, and the device can be made compact.

Next, FIG. 5 is a cycle system diagram of an air-cooling absorption air conditioner according to another embodiment of the present invention, and FIG. 6 is a dueling diagram in the cycle of FIG. In the figure, the same reference numerals as those in FIG. 1 denote the same parts as those in the embodiment of FIG.

The difference between the embodiment of FIG. 5 and the embodiment of FIG. 1 lies in the flow system of the solution circulation system.

The dilute solution generated by the absorber 5 is first passed through the thermal mass exchange device 14.
And is sent to the high-temperature regenerator 1 via the pipe 41, the high-temperature heat exchanger 7, and the pipe 41a to be concentrated. The generated concentrated solution is sent to the low-temperature regenerator 2 through the pipe 42a, the high-temperature heat exchanger 7, and the pipe 42c, and is further concentrated. , So-called series flow.

In this case, since the solution concentration of the low-temperature regenerator 2 has already been concentrated by the high-temperature regenerator 1 and is high, the operating pressure of the high-temperature regenerator 1 becomes higher than the parallel flow of the embodiment of FIG.
In particular, there is a high risk of exceeding the atmospheric pressure in an air-cooled absorption air conditioner. Here, when the concentration of the low-temperature regenerator 2 is high, the temperature of the solution that balances with the pressure of the condenser 3 also increases. The pressure becomes high. However, the regenerator side of the cycle shifts to a low temperature and the absorber side shifts to a high temperature due to the operation of the heat and mass exchange device 14, and the solution concentration of the low temperature regenerator 2 decreases as shown in the Dueling diagram of FIG. Since the concentration of the solution may be lower than that of the solution, the working pressure can be reduced, and an air-cooling absorption air conditioner with high safety can be provided.

In the embodiment shown in FIG. 5, the flash evaporation chamber 27 is not provided. The heat and mass exchange device 14 is composed of three stages,
Absorption chamber 16 in which refrigerant vapor generated in 15 is installed horizontally
1 and 2 is the same as that of the embodiment shown in FIGS. 1 and 2, but the same function can be obtained even if the regeneration chamber 15 and the absorption chamber 16 are vertically stacked. Therefore, the description is omitted here.

Next, FIG. 7 is a cycle system diagram of an air-cooling absorption air conditioner according to still another embodiment of the present invention, and FIG. 8 is a dueling diagram in the cycle of FIG. In the figure, the first
Since the same reference numerals as those in the drawing are the same as those in the embodiment of FIG.
The description is omitted.

The difference between the embodiment of FIG. 7 and the embodiment of FIG. 1 lies in the flow system of the solution circulation system.

The dilute solution generated in the absorption chamber 5 is first heated
14, is sent to the low-temperature regenerator 2 via pipes 41 and 41b, and is concentrated. The solution pump 9c and the high-temperature heat exchanger 7 are connected by the pipe 42b.
Is sent to the high-temperature regenerator 1 via the pipe 42e and is concentrated to a higher concentration. The concentrated solution passes through the high-temperature heat exchanger 7 via the pipe 42f, and then returns to the absorber 5 via the heat-substance exchange device 14 according to the waste plan 42, which is a so-called reverse cycle.

In this method, the absorption temperature level of the absorber 5 can be shifted to a higher temperature side, as shown in the Düling diagram of FIG. 8, so that the heat exchange temperature difference between the solution of the absorber 5 and the cooling air can be increased. There is an effect that the absorber 5 can be made compact. Further, since the temperature difference between the entrance and exit of the cooling air can be increased, the amount of cooling air can be reduced, and there is an effect that a low-noise air-cooling absorption air-conditioning machine can be provided.

Next, FIG. 9 is a cycle system diagram of an air-cooling absorption cooling / heating machine according to still another embodiment of the present invention, and FIG. 10 is a dueling diagram in the cycle of FIG. In the figure, the first
The components having the same reference numerals as those in the drawing are the same as those in the embodiment of FIG.

The difference between the embodiment of FIG. 9 and the embodiment of FIG. 1 lies in the flow system of the solution circulation system.

The dilute solution generated in the absorber 5 is first converted into a heat-material exchange device
The mixture is divided into two via the pipe 14, a part of which is sent to the low-temperature regenerator 2 by the pipe 41 b and concentrated, and the other is sent to the high-temperature regenerator 1 by the pipe 41 a via the high-temperature heat exchanger 7 and concentrated. The concentrated solution passes through the high-temperature heat exchanger 7 through the pipe 42a, is led to the low-temperature regenerator 2 through the pipe 42c, is further concentrated, and is further concentrated through the thermal substance exchanger 14 through the pipes 42d and 42. Returning to 5, the configuration is such that a series flow cycle is combined with a parallel flow.

Also in this method, as shown in the Dülling diagram of FIG. 10, the absorption temperature level of the absorber 5 can be shifted to a higher temperature side, so that the heat exchange temperature difference between the solution of the absorber 5 and the cooling air can be increased, and the absorption temperature can be increased. This has the effect of making the vessel 5 compact.
Further, since the temperature difference between the inlet and outlet of the cooling air can be increased, the amount of the cooling air can be reduced, thereby providing an effect of providing a low-noise air-cooling absorption cooling and heating machine.

The liquid level control of the heat and mass exchange unit 14 is NP
Adjustment may be made by reducing the liquid feed amount due to SH shortage. Even if the NPSH of each pump is insufficient, if only the pump impeller which affects the cooling in the candid mode is protected by solution recirculation, etc., there is no problem even if other pumps run idle. Such one
The use of the multi-shaft multiple pump has the effect of providing a heat-material exchange device 14 that can exchange heat-material efficiently with a small amount of solution.

In each of the above embodiments, an example in which a plurality of absorption / regeneration chamber units are arranged side by side at an interval has been described.
The present invention is not limited to this. Although not shown and described, it is also possible to adopt a configuration in which a plurality of stages of absorption chambers and a plurality of stages of regeneration chambers are arranged closely adjacent to each other. As a result, the material of each shell can be saved, and the thermal mass exchange apparatus can be made compact.

〔The invention's effect〕

As described above in detail, according to the present invention, since the absorption temperature level of the absorber can be shifted to the higher temperature side by disposing the thermal mass exchange device, the heat exchange between the solution of the absorber and the cooling air is performed. It is possible to provide a low-noise air-cooling absorption air conditioner that can reduce the temperature difference and make the air-cooling absorber small and compact, and also can increase the temperature difference between the inlet and outlet of the cooling air, thereby reducing the amount of cooling air.

Further, by lowering the operating temperature and the absorbent concentration of the high-temperature regenerator, it is possible to provide an air-cooling absorption air-conditioning machine having corrosion resistance.

[Brief description of the drawings]

FIG. 1 is a cycle system diagram of an air-cooling absorption air conditioner according to one embodiment of the present invention, FIG. 2 is a configuration diagram of a heat-substance exchange device of FIG. 1, and FIG. FIG. 4 is a partial perspective view showing the structure of the filler,
FIG. 5 is a cycle diagram of an air-cooling absorption air conditioner according to another embodiment of the present invention, FIG. 6 is a Dueling diagram in the cycle of FIG. 5, and FIG. 7 is still another embodiment of the present invention. FIG. 8 is a cycle diagram of the air-cooling absorption air conditioner according to the example, FIG.
FIG. 10 is a cycle system diagram of an air-cooling absorption air conditioner according to still another embodiment of the present invention, and FIG. 10 is a dueling diagram in the cycle of FIG. 1 high-temperature regenerator, 2 low-temperature regenerator, 3 air-cooled condenser, 4 evaporator, 5 air-cooled absorber, 6 low-temperature heat exchanger, 7 high-temperature heat exchanger, 9a, 9b …… Solution pump, 10
…… Refrigerant pump, 14 …… Thermal heat exchanger, 14A, 14B, 14C
…… Absorption / regeneration room unit, 15,15a, 15b, 15c …… Regeneration room, 16,16a, 16b, 16c …… Absorption room, 18,18a, 18b, 18c… Concentrated solution spraying means, 19 …… Liquid interface area expansion means, 19a ……
Corrugated mesh filling, 19b ... saw-tooth filling, 20, 24 ... droplet removing means, 21a, 21b, 21c ... concentrated solution pump, 22, 22a, 22b,
22c ... dilute solution spraying means, 23 ... gas-liquid interface area enlarging means, 25a, 25b, 25c ... dilute solution pump, 30b, 30c ... communicating pipe, 31a, 31b, 31c ... partition.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seichiro Sakaguchi 502 Kandate-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. Inside the Machinery Research Laboratory (72) Inventor Michihiko Aizawa 603 Kandamachi, Tsuchiura-shi, Ibaraki Pref., Tsuchiura Plant, Hitachi, Ltd. References JP-A-53-1355 (JP, A) JP-A-60-1401 (JP, U) JP-A-1-88093 (JP, U) JP-B-56-17882 (JP, B2) JP-B-40 -28452 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F25B 15/00 303

Claims (2)

(57) [Claims] 1. A high-temperature regenerator, a low-temperature regenerator, an air-cooled condenser, an evaporator, an air-cooled absorber, a high-temperature heat exchanger, a low-temperature heat exchanger, a solution pump, a refrigerant pump, and a piping system for operatively connecting these. In the air-cooled absorption air conditioner comprising: a regeneration chamber that guides the concentrated solution returning from the high-temperature regenerator or the low-temperature regenerator to the air-cooled absorber and flash-evaporates the flash-evaporated refrigerant vapor into the dilute solution generated by the air-cooled absorber. An absorption / regeneration chamber unit is configured by arranging the absorption chamber to be absorbed so as to face through a solution removing means, and a plurality of absorption / regeneration chamber units are arranged, and the first stage is provided with an air-cooled absorber. A plurality of absorption / regeneration chamber units, each stage of the regeneration chamber is provided with a solution spraying means, and a corrugated or saw-toothed shape below the solution spraying means. Shaped into A gas-liquid interface area enlarging means provided with openings in the horizontal direction in which the net-like packing is alternately arranged in a plurality of stages, and connected to the absorption chamber opposed through the droplet removing means, and via the solution pump An air-cooled absorption air conditioner connected to one of a solution spraying means and an air-cooled absorber in a regeneration chamber in the next stage. 2. A high-temperature regenerator, a low-temperature regenerator, an air-cooled condenser, an evaporator, an air-cooled absorber, a high-temperature heat exchanger, a low-temperature heat exchanger, a solution pump, a refrigerant pump, and a piping system for operatively connecting these. In the air-cooled absorption air conditioner comprising: a regeneration chamber that guides the concentrated solution returning from the high-temperature regenerator or the low-temperature regenerator to the air-cooled absorber and flash-evaporates the flash-evaporated refrigerant vapor into the dilute solution generated by the air-cooled absorber. An absorption / regeneration chamber unit is configured by arranging the absorption chamber to be absorbed so as to face through a solution removing means, and a plurality of absorption / regeneration chamber units are arranged, and the first stage is connected to an air-cooled absorber. The final stage is provided with a piping system connected to the regenerator side, and each stage of the absorption chamber in the multiple-stage absorption / regeneration chamber unit is provided with a solution spraying means and a wavy or saw-toothed shape below the solution spraying means. Shaped net And a gas-liquid interface area enlarging means provided with openings in the horizontal direction in which a plurality of step-like packings are alternately arranged, connected to a regenerating chamber opposed via a droplet removing means, and via a solution pump. An air-cooled absorption air conditioner connected to a solution spraying means of a next stage absorption chamber or one of a low-temperature heat exchanger and a high-temperature heat exchanger.