JP3031847B2 - Absorption air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type air conditioner capable of cooling a room using an absorption type refrigeration cycle, and more particularly to a technique for extracting non-condensable gas in the absorption type refrigeration cycle.

[0002]

2. Description of the Related Art An absorption refrigeration cycle uses a highly corrosive absorption liquid. Therefore, when corrosion occurs in the absorption refrigeration cycle, insoluble non-condensable gas such as hydrogen gas is generated.
The non-condensable gas generated in the absorption refrigeration cycle is gradually accumulated in the absorber having the lowest internal pressure in the absorption refrigeration cycle. Therefore, the internal pressure of the absorber and the evaporator increases due to the presence of the non-condensable gas. As a result,
The boiling point of the refrigerant in the evaporator rises, the evaporation capacity decreases, and the refrigeration capacity of the absorption refrigeration cycle decreases.

[0003] Therefore, conventionally, there has been proposed an air extraction device for extracting non-condensable gas generated in the absorption refrigeration cycle from the absorption refrigeration cycle. An example of the bleeding device will be described. This bleeding device assists absorption of a part of the absorption liquid from an absorption liquid spraying device (concentrated absorption liquid is supplied and the supplied absorption liquid is sprayed downward) used in the absorber of the absorption refrigeration cycle. An absorbent introduction passage leading to the absorber, a gas introduction passage leading uncondensed gas accumulated in the absorber or the evaporator to the auxiliary absorber, and a refrigerant contained in the uncondensed gas supplied from the gas introduction passage. An auxiliary absorber for absorbing the absorption liquid supplied from the introduction passage, and a gas-liquid discharge passage for alternately flowing the non-condensable gas and the absorption liquid from the auxiliary absorber,
The gas-liquid separator includes a gas-liquid separator that separates the non-condensable gas discharged from the gas-liquid discharge passage from the absorption liquid, and a non-condensing tank that stores the non-condensable gas separated by the gas-liquid separator.

[0004]

Since the upper end of the conventional absorbing liquid introduction passage is provided to be joined to the bottom surface of the absorbing liquid spraying device, a part (5 liters) of the absorbing liquid supplied to the absorbing liquid spraying device is provided. / H) is always supplied to the auxiliary absorber via the absorption liquid introduction passage. Since the absorption liquid supplied to the auxiliary absorber does not absorb the refrigerant in the absorber, the refrigeration capacity of the absorption refrigeration cycle is reduced by the amount of the absorption liquid supplied to the auxiliary absorber. In particular, when the operation capacity is small, in which the amount of the absorbing liquid supplied to the absorbent sprayer is small, the ratio of the absorbing liquid supplied to the auxiliary absorber is relatively increased, and the degree of decrease in the refrigeration capacity is significantly large. Become.

Further, since the amount of non-condensable gas generated in the absorption refrigeration cycle is small, the bleeding capacity of the auxiliary absorber is excessive. That is, in the related art, the refrigeration capacity is unnecessarily reduced, and the bleeding capacity is provided excessively.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object only when the flow rate of the absorbent supplied to the absorbent sprayer is large and the operating capacity of the absorption refrigeration cycle is large. Another object of the present invention is to provide an absorption-type air conditioner that exerts a bleeding capacity to improve the refrigeration capacity of the absorption refrigeration cycle and secure the bleeding capacity.

[0007]

Means for Solving the Problems The absorption type air conditioner of the present invention employs the following technical means to achieve the above object. [Means of claim 1] Absorption type air conditioner comprises: a) heating means for heating the absorption liquid; and b) a regenerator for heating the absorption liquid with the heating means to vaporize a part of the absorption liquid. A condenser that cools and liquefies the vaporized refrigerant generated in the condenser, an evaporator that evaporates the liquefied refrigerant liquefied in the condenser under low pressure, an absorber that absorbs the vaporized refrigerant evaporated in the evaporator into an absorbent, A solution pump for pumping the absorbent in the absorber to the regenerator; and a low-pressure environment in the absorber among the absorbents provided in the absorber and provided in the absorber. An absorption refrigeration cycle having an absorption liquid spraying device for spraying the absorption liquid condensed after being partially boiled and evaporated, and c) opening inside the absorption refrigeration cycle, Introduce non-condensable gas A) a gas introduction passage which is connected to the absorbent sprayer and introduces a part of the absorbent supplied to the absorbent sprayer; and e) the gas inlet passage and the absorbent. An auxiliary absorber to which an introduction passage is connected, and wherein the non-condensable gas and the absorbent are supplied to the inside by the gas introduction passage and the absorbent introduction passage; f) connected to the auxiliary absorber; A) a gas-liquid discharge passage for alternately flowing the non-condensable gas and the absorption liquid supplied to the tank; g) a non-condensable gas tank for storing the non-condensable gas; and h) a non-condensable gas and an absorption liquid flowing from the gas-liquid discharge passage. A gas-liquid separator that guides the separated non-condensable gas to the non-condensable gas tank and guides the separated absorption liquid into the absorption refrigeration cycle. From the area affected by It is characterized in that it is opened above the bottom of the absorbent sprayer at a portion where the liquid level of the absorbent is stable.

[0008] (2) The absorption air conditioner of (1), wherein the auxiliary absorber is disposed inside the absorption refrigeration cycle.

According to a third aspect of the present invention, in the absorption type air conditioner of the second aspect, the auxiliary absorber has a flat shape in which two press-formed plates are joined, and the gas introduction passage and the absorption liquid introduction passage are provided. And the respective connection ports of the gas-liquid discharge passage are formed when the two press-formed plates are combined.

According to a fourth aspect of the present invention, in the absorption type air conditioner according to any one of the first to third aspects, the auxiliary absorber is cooled by cooling means, and is vaporized refrigerant introduced inside together with the non-condensable gas. Is characterized in that the heat of absorption generated when water is absorbed by the absorbing liquid is removed.

According to a fifth aspect of the present invention, in the absorption type air conditioner according to any one of the first to fourth aspects, the gas-liquid discharge passage drops the absorption liquid introduced into the auxiliary absorber downward. For this purpose, a gas-liquid suction port for sucking the absorbing liquid and the non-condensable gas in the auxiliary absorber is provided downward, and the gas-liquid discharge passage is provided from the gas-liquid discharge passage. The non-condensable gas in the auxiliary absorber is sucked into the gas-liquid discharge passage from the gas-liquid suction port by the action of the absorbing liquid that falls into the separator.

[0012]

When the absorption means is heated by the heating means and the absorption refrigeration cycle is operated, the absorption liquid condensed by the regenerator is supplied to the absorption liquid dispersing tool. . When the operation capacity of the absorption refrigeration cycle is low and the supply amount of the absorption liquid supplied to the absorption liquid dispenser is small, the level of the absorption liquid in the absorption liquid disperser is low, and the liquid level of the absorption liquid is the absorption liquid introduction. Without reaching the opening at the upper end of the passage, all of the absorbing liquid supplied to the absorbing liquid sprayer is sprayed into the absorber.

When the operation capacity of the absorption refrigeration cycle is high and the supply amount of the absorption liquid supplied to the absorption liquid spraying tool is large,
The liquid level of the absorbing liquid in the absorbing liquid dispenser rises, and the liquid level of the absorbing liquid reaches the opening at the upper end of the absorbing liquid introduction passage. Then
A part of the absorbing liquid supplied to the absorbing liquid sprayer is supplied to the auxiliary absorbing liquid from the absorbing liquid introduction passage, and the remaining absorbing liquid is sprayed into the absorber.

As described above, in the present invention, the flow rate of the absorbing liquid supplied to the absorbing liquid sprayer is large, and the bleeding capacity is secured only when the refrigeration capacity of the absorption refrigeration cycle is large. When the flow rate of the supplied absorbing liquid is small, the bleeding function is automatically stopped to prevent a decrease in the refrigeration capacity of the absorption refrigeration cycle.

[Action and Effect of Claim 2] The auxiliary absorber is disposed inside the absorption refrigeration cycle. For this reason, even if airtight leakage occurs at the joint of the gas introduction passage, the absorption liquid introduction passage, and the gas-liquid discharge passage joined to the auxiliary absorber, air does not enter the absorption refrigeration cycle. That is, there is no problem that air enters the absorption refrigeration cycle from the auxiliary absorber, and the reliability of the absorption air conditioner can be improved.

According to the third aspect of the present invention, since the auxiliary absorber is provided flat by joining two press-formed plates, there is a problem in that the absorption refrigeration cycle in which the auxiliary absorber is disposed inside becomes large. Can be avoided.

According to the fourth aspect of the present invention, the auxiliary absorber is cooled by the cooling means to remove heat of absorption generated when the vaporized refrigerant is absorbed by the absorbing liquid in the auxiliary absorber. The absorption capacity of the liquid can be prevented from lowering, and the vaporized refrigerant can be reliably absorbed by the absorbing liquid in the auxiliary absorber. As a result, the vaporized refrigerant in the gas supplied to the gas-liquid separator is reliably removed, and only the non-condensable gas can be sent from the gas-liquid separator to the non-condensing tank.

[Function and Effect of Claim 5] The upper side of the gas-liquid inlet of the gas-liquid discharge passage is provided downward. For this reason, the liquid level of the absorption liquid supplied into the auxiliary absorber rises, and the absorption liquid collectively falls through the gas-liquid discharge passage to the gas-liquid separator (siphon action). The gas inside is sucked into the gas-liquid discharge passage. Then, the gas in the auxiliary absorber is sucked into the gas-liquid discharge passage, so that the non-condensable gas in the absorption refrigeration cycle is sucked from the gas introduction passage and guided into the auxiliary absorber.

That is, the non-condensable gas in the absorption refrigeration cycle can be guided to the gas-liquid separator via the auxiliary absorber by the siphon action. A device (eg, a pump device) for guiding the non-condensable gas to the non-condensable tank can be reduced, and the cost for extracting the non-condensable gas into the non-condensable tank can be reduced.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an absorption type air conditioner of the present invention will be described based on an embodiment shown in the drawings. FIG. 1 to FIG. 6 show an embodiment, and FIG. 2 is a schematic configuration diagram of an absorption air conditioner using a double effect absorption refrigeration cycle for performing indoor air conditioning.

(Schematic description of absorption type air conditioner 1) The absorption type air conditioner 1 to which the present embodiment is applied is a relatively small one used for home use and the like. In this example, a heating means 2 for heating lithium bromide aqueous solution, a double effect absorption refrigeration cycle 3, and cold / hot water cooled or heated by the absorption refrigeration cycle 3 (a heat medium for cooling / heating the room; Indoor air-conditioning means 4 for air-conditioning the room with water in the embodiment, and cooling water cooling means 5 for cooling the cooling water mainly used for cooling the vaporized refrigerant (steam in this embodiment) in the absorption refrigeration cycle 3. And a control device 6 for controlling each mounted electric functional component.

(Explanation of Heating Means 2) The heating means 2 of the present embodiment is a gas combustion device which burns a gas as a fuel to generate heat and heats the absorbing liquid by the generated heat. The gas burner 11 includes a gas supply unit 12 that supplies gas to the gas burner 11, a combustion fan 13 that supplies air for combustion to the gas burner 11, and the like.
Then, the heat obtained by the gas combustion of the gas burner 11 heats the boiler 14 of the absorption refrigeration cycle 3, and the boiler 14
It is provided so as to heat the low-concentration absorption liquid (hereinafter, low liquid) supplied to the inside.

(Explanation of the Absorption Refrigeration Cycle 3) The absorption refrigeration cycle 3 includes a boiler 14 heated by the heating means 2, and the low liquid supplied into the boiler 14 is heated to reduce the temperature of the liquid. A high-temperature regenerator 15 that evaporates (evaporates) a refrigerant (water) contained in the liquid into a medium-concentration absorbing liquid (hereinafter, medium liquid), and utilizes heat of condensation of the vaporized refrigerant in the high-temperature regenerator 15, A low-temperature regenerator 16 that heats an intermediate liquid supplied from the high-temperature regenerator 15 using a pressure difference, vaporizes a refrigerant contained in the intermediate liquid, and turns the intermediate liquid into a high-concentration absorbing liquid (hereinafter, high liquid). A condenser 17 for cooling and liquefying the vaporized refrigerant (steam) from the high-temperature regenerator 15 and the low-temperature regenerator 16;
An evaporator 18 for evaporating the liquefied refrigerant (water) liquefied by the condenser 17 under a pressure close to vacuum, and an absorption for absorbing the vaporized refrigerant evaporated by the evaporator 18 to the high liquid obtained by the low-temperature regenerator 16. And a vessel 19.

(Explanation of the high temperature regenerator 15)
Is a boiler 1 for heating the low liquid by the heating means 2.
4, and a boiling cylinder 21 extending upward from the boiler 14
Is provided. The vaporized refrigerant that has been boiled in the boiler 14 and the boiling cylinder 21 and vaporized from the low liquid is blown out from the boiling cylinder 21 into the cylindrical high-temperature regeneration container 22. The high-temperature vaporized refrigerant blown into the high-temperature regeneration container 22 is
The second wall removes heat as heat of vaporization when the middle liquid in the low-temperature regenerator 16 evaporates and is cooled to become a liquefied refrigerant (water).

In the high-temperature regenerating vessel 22, the medium liquid in the boiling cylinder 21 after the refrigerant in the low liquid is vaporized by being heated by the boiler 14 and the liquefied refrigerant (water) stored in the surroundings are insulated. For this purpose, a heat insulating partition tube 24 is provided around the boiling tube 21. The heat insulating partition tube 24 has an upper end joined to the upper end of the boiling tube 21, a lower end provided with a gap from the boiling tube 21, and provided such that air enters between the boiling tube 21 and the heat insulating partition tube 24. Have been. The liquefied refrigerant (water) liquefied in the high-temperature regeneration container 22 and separated outside the heat insulating partition tube 24 is guided to the condenser 17 through a liquid refrigerant pipe 25 connected to a lower portion.

(Explanation of the low-temperature regenerator 16)
Includes a cylindrical low-temperature regeneration container 31 covering the high-temperature regeneration container 22. On the other hand, the middle liquid in the boiling cylinder 21 is supplied to the low-temperature regenerator 16 through a middle liquid pipe 26 connected to a lower part of the boiling cylinder 21. The middle liquid pipe 26 is provided with a throttle means 27 such as an orifice. This aperture means 27
When the cooling / heating switching valve 53 described later is closed, the medium flows while maintaining the pressure difference between the high-temperature regenerator 15 and the low-temperature regenerator 16. Do not shed.

The low temperature regenerator 16 injects the middle liquid supplied through the middle liquid pipe 26 toward the ceiling of the high temperature regeneration container 22. The temperature in the low temperature regeneration vessel 31 is
2, the pressure in the low temperature regeneration container 31 is lower than the pressure in the high temperature regeneration container 22. Therefore, the middle liquid supplied from the middle liquid pipe 26 into the low-temperature regeneration container 31 is easily evaporated. Then, when the middle liquid is injected into the ceiling of the high temperature regeneration container 22, the middle liquid is heated by the wall of the high temperature regeneration container 22, and a part of the refrigerant contained in the middle liquid evaporates to become a vaporized refrigerant, Becomes high liquid.

Here, the upper part of the low-temperature regeneration container 31 communicates with the upper part of the condensing container 32 in the shape of an annular container through a communication part 33. Therefore, the vaporized refrigerant evaporated in the low-temperature regeneration container 31 is supplied into the condensation container 32 through the communication portion 33. On the other hand, the high liquid falls to the lower part of the low temperature regeneration container 31 and is supplied to the absorber 19 through the high liquid pipe 34 connected to the lower part of the low temperature regeneration container 31. In addition, the low temperature regeneration container 3
1, a ceiling plate 35 is provided.
A gap 36 through which the vaporized refrigerant passes is provided between the outer peripheral end of 5 and the low temperature regeneration container 31.

(Explanation of the Condenser 17) The condenser 17 is covered by a condensing container 32 having an annular container shape. Inside the condensing container 32, a condensing heat exchanger 37 for cooling and liquefying the vaporized refrigerant in the condensing container 32 is arranged. The condensing heat exchanger 37 is an annular coil through which cooling water flows. The liquefied refrigerant supplied from the low-temperature regenerator 16 into the condensing container 32 is supplied to the condensing heat exchanger 3.
The mixture is cooled and liquefied by 7 and dropped below the condensing heat exchanger 37.

On the other hand, a refrigerant is supplied to the lower side of the condensing container 32 from the high-temperature regenerator 15 through the liquid refrigerant pipe 25. When the supplied refrigerant is supplied into the condensing container 32, the pressure difference (the pressure inside the condensing container 32 is about 70 mmHg).
From low pressure), the mixture is reboiled, and supplied in a state where the vaporized refrigerant and the liquefied refrigerant are mixed. Further, a liquid refrigerant supply pipe 38 for guiding the liquefied refrigerant to the evaporator 18 is connected to the condensation container 32. The liquid refrigerant supply pipe 38 is provided with a refrigerant valve 39 for adjusting the supply amount of the liquefied refrigerant supplied from the condensation container 32 to the evaporator 18.

(Explanation of Evaporator 18) The evaporator 18 is provided below the condensing container 32 together with the absorber 19, and is formed by an annular-shaped evaporative absorption container 41 provided around the low-temperature regeneration container 31. Covered. An evaporation heat exchanger 42 for evaporating the liquefied refrigerant supplied from the condenser 17 is disposed outside the inside of the evaporation absorption container 41. This evaporating heat exchanger 42 is an annular coil,
Cold and hot water (heat medium) supplied to the indoor air-conditioning means 4 inside
Flows. The liquefied refrigerant supplied from the condenser 17 via the liquid refrigerant supply pipe 38 is sprayed onto the evaporating heat exchanger 42 from an annular refrigerant spraying tool 43 disposed above the evaporating heat exchanger 42. Is done.

Since the inside of the evaporative absorption container 41 is kept substantially at a vacuum (for example, 6.5 mmHg), it has a low boiling point, and the liquefied refrigerant sprayed to the evaporating heat exchanger 42 is very easy to evaporate. The liquefied refrigerant sprayed on the evaporating heat exchanger 42 evaporates by removing heat of vaporization from the heat medium flowing in the evaporating heat exchanger 42. As a result, the heat medium flowing in the evaporating heat exchanger 42 is cooled. Then, the cooled heat medium is guided to the indoor air conditioner 4 to cool the room.

(Explanation of the Absorber 19) The absorber 19 is covered with the evaporation absorption container 41 as described above. The absorber 19 is provided inside the evaporative absorption container 41 with the high liquid pipe 3.
An absorption heat exchanger 44 for cooling the high liquid supplied from 4 is arranged. The heat exchanger 44 for absorption is an annular coil, and the inside thereof is supplied with cooling water for cooling the high liquid sprayed on the coil. After passing through the heat exchanger 44 for absorption, the cooling water passes through the heat exchanger 37 for condensation of the condenser 17 and is guided to the cooling water cooling means 5 to be cooled. Then, the cooling water cooled by the cooling water cooling means 5 is guided again to the absorption heat exchanger 44.

On the other hand, on the upper part of the absorption heat exchanger 44, an annular absorbent dispersion device 45 for dispersing the high liquid supplied from the high liquid pipe 34 to the absorption heat exchanger 44 is arranged. The high liquid supplied from the high liquid pipe 34 is once boiled by the low-pressure environment in the absorber 19 and then condensed, and the liquid level is stably supplied to the entire circumference of the annular absorbent dispersion device 45. The high liquid sprayed from the absorbent sprayer 45 to the heat exchanger 44 for absorption is transmitted through the coil surface of the heat exchanger 44 for absorption and falls from above to below while evaporating in the heat exchanger 42 for evaporation. The generated refrigerant is absorbed. As a result, the absorption liquid that has fallen to the bottom of the evaporative absorption container 41 becomes a low-concentration liquid.

Inside the evaporative absorption container 41, between the evaporating heat exchanger 42 and the absorbing heat exchanger 44, a cylindrical partition wall 4 is provided.
6 are arranged. The cylindrical partition wall 46 communicates with the inside of the evaporation absorption container 41 only at the upper side, and the vaporized refrigerant generated by the evaporator 18 is guided into the absorber 19 through the upper part of the cylindrical partition wall 46. .

A low liquid pipe 47 for supplying the low liquid at the bottom of the evaporative absorption container 41 to the boiler 14 is connected to the bottom of the evaporative absorption container 41. The low liquid pipe 47 is provided with a solution pump 48 for flowing the low liquid from the inside of the evaporation absorption container 41 in a substantially vacuum state toward the boiler 14.

(Description of other components in absorption refrigeration cycle 3) Reference numeral 51 shown in FIG.
A high-temperature heat exchanger 51 for exchanging heat between the medium liquid flowing from inside to the low-temperature regenerator 16 and the low liquid flowing from the absorber 19 to the boiler 14.
a, and a low-temperature heat exchanger 51b for exchanging heat between the high liquid flowing from the low-temperature regenerator 16 to the absorber 19 and the low liquid flowing from the absorber 19 to the boiler 14. The high-temperature heat exchanger 51a cools the middle liquid flowing from the boiling cylinder 21 to the low-temperature regenerator 16 and heats the low liquid flowing from the absorber 19 to the boiler 14. The low-temperature heat exchanger 51b cools the high liquid flowing from the low-temperature regenerator 16 to the absorber 19 and heats the low liquid flowing from the absorber 19 to the boiler 14.

The absorption refrigeration cycle 3 of this embodiment is provided with heating operation means for performing a heating operation in addition to the cooling operation by the above-described operation. The heating operation means includes a heating pipe 52 for guiding the high-temperature absorbing liquid from the lower part of the boiling cylinder 21 to a lower part of the evaporator 18, and a cooling / heating switching valve 53 for opening and closing the heating pipe 52. The cooling / heating switching valve 53 opens during the heating operation to guide the high-temperature absorbing liquid into the evaporating / absorbing container 41 and heat the cold / hot water flowing in the evaporating heat exchanger 42 of the evaporator 18.

(Explanation of the indoor air-conditioning means 4)
Is forcibly exchanging heat between the cold and hot water passing through the indoor heat exchanger 54 installed in the room and the evaporator 18 flowing through the indoor heat exchanger 54 and the room air, and blowing the air after the heat exchange into the room. And an indoor fan 55 for causing the indoor fan 55 to operate.

A cold / hot water circuit 56 for circulating cold / hot water is connected to the indoor heat exchanger 54. The cold / hot water circuit 56 is provided with a cold / hot water pump 57 for circulating cold / hot water. The cold / hot water pump 57 is driven by a motor that also drives the solution pump 48.

The cold / hot water circuit 56 is a water pipe that guides the cold / hot water that has passed through the evaporator 18 to the indoor heat exchanger 54 and guides the cold / hot water that has exchanged heat with the room air to the evaporator 18 again. Inside, the indoor heat exchanger 54 and the cold / hot water pump 57
In addition, a cistern 58 for storing cold / hot water and replenishing cold / hot water in the cold / hot water circuit 56 is provided while functioning as an expansion tank for heating.

A water supply pipe 59 for supplying cold / hot water (tap water) to the inside is connected to the cistern 58. In this water supply pipe 59, supply of cold and hot water into the cistern 58,
A water supply valve 60 for stopping is provided. The cistern 58 includes a water level sensor (not shown).
To open and refill the cistern 58 with cold and hot water. Further, the cistern 58 is provided with overflow water supply means 59a for guiding the overflowed cold / hot water into a cooling water tank 65 described later.

(Description of Cooling Water Cooling Means 5) The cooling water cooling means 5 includes an evaporative cooling tower 61, a cooling water circuit 62 for circulating cooling water, and a cooling water pump for circulating cooling water in the cooling water circuit 62. 63 is provided. The cooling tower 61 includes the absorber 1
The cooling water that has passed through the condenser 9 and the condenser 17 flows downward from above, exchanges heat with the outside air while flowing to radiate heat, and partially evaporates during the flow, thereby cooling during the evaporation. A spraying unit 61 for removing vaporization heat from water and cooling the flowing cooling water, and spraying the cooling water upward.
a, an evaporator 61b having a large surface area through which the cooling water flows, and a collector 61c for collecting the cooling water passing through the evaporator 61b
It is composed of In addition, the cooling tower 61 includes an evaporator 6
1b is provided with a cooling water fan 64 for generating an air flow and promoting the evaporation and cooling of the cooling water in the evaporating section 61b.

The cooling water circuit 62 passes the cooling water having passed through the absorber 19 and the condenser 17 and having the increased temperature to the cooling tower 6.
1 and sends the cooling water cooled by the cooling tower 61 to the absorber 19 and the condenser 17 again. In the cooling water circuit 62, in addition to the cooling tower 61 and the cooling water pump 63,
A cooling water tank 65 for storing cooling water is provided.

The cooling water tank 65 is installed below the cooling tower 61 and below the cistern 58,
The cooling water passing through 1 is supplied, and the water overflowing in the cistern 58 is supplied. The cooling water tank 65 is provided with a water level sensor (not shown). When the level of the cooling water in the cooling water tank 65 decreases, the water supply valve 60 is opened to overflow the water from the cistern 58, and the overflowed water is supplied to the overflow water supply means. 59
The cooling water is supplied to the inside of the cooling water tank 65 from a.

(Explanation of the control device 6) The control device 6 includes the above-described refrigerant valve 39, solution pump 48 (cold / hot water pump 57),
Electric functional parts such as the indoor fan 55, the cooling / heating switching valve 53, the water supply valve 60, the cooling water pump 63, the cooling water fan 64, and the electric functional parts of the heating means 2 (combustion fan 1
3. Gas control valve 66, gas on-off valve 67, ignition device 68
) Is controlled in accordance with an operation instruction of a controller (not shown) manually set by a user or an input signal of each of a plurality of sensors.

(Explanation of the bleeding device 70) Absorption type air conditioner 1
As shown in FIG. 1, a gas extraction device 70 is provided for extracting and storing non-condensable gas such as hydrogen generated by corrosion in the absorption refrigeration cycle 3 from the absorption refrigeration cycle 3. The bleeding device 70 mainly includes an auxiliary absorber 71 for alternately flowing the non-condensable gas and the absorption liquid extracted from the absorption refrigeration cycle 3, and the non-condensable gas and the absorption liquid supplied from the auxiliary absorber 71. And a non-condensable gas tank 73 for storing the non-condensable gas separated by the gas-liquid separator 72.

The auxiliary absorber 71 is disposed in the absorber 19, and is a non-condensable gas in the absorption refrigeration cycle 3 (in this embodiment, a non-condensable gas accumulated in a lower portion of the absorber 19).
Is connected, and an absorption liquid introduction passage 75 for introducing a part (for example, 5 liter / h) of the high liquid (absorption liquid) supplied to the absorption liquid spraying tool 45 is connected. Further, a gas-liquid discharge passage 76 for alternately flowing out the gas and the absorbing liquid introduced therein is connected.

The auxiliary absorber 71 is also shown in FIGS. 3 to 5 and has a flat shape provided by combining two press-formed plates 71a. Pumping pipe 7 constituting liquid discharge passage 76
6a is integrally brazed together with the two press-formed plates 71a while being inserted into the connection ports 74c and 76d formed in the two press-formed plates 71a.

Liquid tube 75a constituting absorption liquid introduction passage 75
As shown in FIG. 6, a funnel-shaped connection port 75b provided at the upper end of the auxiliary absorber 71 with its upper end penetrating through the bottom surface of the absorbent sprayer 45 (FIGS. 3 and 4).
See). In addition, the absorption liquid introduction passage 7
An orifice 75c for adjusting the flow rate of the high liquid supplied to the auxiliary absorber 71 is joined to a downstream end of the fifth pipe 5 (a downstream end of the liquid pipe 75a) by brazing.

Here, as shown in FIG. 6, the upper end of the liquid pipe 75a constituting the absorbing liquid introduction passage 75 is connected to the absorbing liquid spraying tool 4 as shown in FIG.
5 is joined to the absorbing liquid spraying tool 45 so as to open above the bottom surface by a predetermined amount α. Further, the absorption liquid introduction passage 75
The upper end of the liquid pipe 75a is separated from a portion where the high liquid boils due to the low pressure environment in the absorber 19, and opens to a portion where the liquid surface of the high liquid is stabilized. In this embodiment, the portion for supplying the high liquid to the absorbent sprayer 45 is on the right side of the absorber 19 as shown in FIG.
As shown in the figure, a high liquid having a stable liquid level is supplied to a portion on the left side of the absorber 19 to which the liquid pipe 75a is connected. By being provided in this way, the high liquid pipe 3
The supply amount of the high liquid supplied to the absorbent sprayer 45 from the liquid supply device 4 is small, and the absorbent sprayer 45 at the portion where the liquid pipe 75a is connected is provided.
If the liquid level of the high liquid in is lower than the predetermined amount α, the high liquid supplied to the absorbent sprayer 45 is not supplied to the auxiliary absorber 71, and all of the high liquid is supplied to the absorber via the spray pipe 45a. 19
Sprinkled inside. Also, from the high liquid pipe 34, the absorbent disperser 4
In the case where the supply amount of the high liquid supplied to the nozzle 5 is large and the liquid level of the high liquid in the absorbing liquid spraying device 45 at the portion connected to the liquid pipe 75a is higher than the predetermined amount α, the high liquid is supplied to the absorbing liquid spraying device 45. Part of high liquid (up to 5 liters / h, orifice 75
(determined by c) is supplied to the auxiliary absorber 71, and the remaining high liquid is sprayed into the absorber 19 via the spray pipe 45a.

As shown in FIGS. 3 and 4, the two press-formed plates 71a are combined to form an auxiliary absorber 71 into which an uncondensable gas containing a vaporized refrigerant and a high liquid (absorbent) are introduced. Is formed, and a gas passage 7 that guides the gas supplied from the lower bleed pipe 74 a to above the auxiliary absorber 71.
4b (constituting a part of the gas introduction passage 74), the connection port 7
4c (see FIG. 5), and a funnel-shaped connection port 75b that receives a drop of high liquid from the absorbing liquid introduction passage 75 are formed.

Further, the two press-formed plates 71a are provided with an inverted substantially U-shaped gas-liquid suction passage 76b whose both ends are directed downward. This gas-liquid suction passage 76b
Is a gas-liquid discharge passage 76 formed by connecting a hanging pumping pipe 76a to a connection port 76d (see FIG. 5) at one end, and a gas-liquid suction port at the other end that opens inside the auxiliary absorber 71. The side 76c is provided downward.

Therefore, when the liquid level of the absorbing liquid in the auxiliary absorber 71 rises and reaches the liquid level at the upper end of the gas-liquid suction passage 76b, the absorbing liquid is united by the siphon action to form the gas-liquid discharging passage 76. Through the gas-liquid separator 72. At this time, the gas in the auxiliary absorber 71 is sucked into the gas-liquid discharge passage 76. Then, the gas in the auxiliary absorber 71 is sucked into the gas-liquid discharge passage 76, so that the absorber 19
The non-condensable gas accumulated in the lower part of the gas is sucked into the auxiliary absorber 71 via the gas introduction passage 74.

The auxiliary absorber 71 removes the heat of absorption generated when the vaporized refrigerant introduced together with the non-condensable gas is absorbed by the absorbing liquid, and prevents the absorption capacity from lowering. A cooling means for cooling the vessel 71 is provided. The cooling means of the present embodiment is a cooling water pipe 77 branched from the absorption heat exchanger 44 through which the cooling water flows. The auxiliary absorber 71 formed by the two press-formed plates 71a has a cooling means. A groove 71b (see FIG. 4) into which the water pipe 77 is fitted is formed, and the cooling water pipe 77 is brazed in the groove 71b. The brazing of the cooling water pipe 77 is performed by brazing integrally with the two press-formed plates 71a, the bleeding pipe 74a forming the gas introduction passage 74, and the pumping pipe 76a forming the gas-liquid discharge passage 76. . The cooling water pipe 77 is connected to the absorption heat exchanger 44 again.
To join.

(Description of Non-Condensable Gas Tank 73) The non-condensable gas tank 73 is a container arranged outside the absorption refrigeration cycle 3 as shown in FIG. ing. The non-condensing gas tank 7
3 is provided with a maintenance valve (not shown), through which non-condensable gas is extracted at a predetermined time.

(Description of Gas-Liquid Separator 72) Gas-Liquid Separator 72
As shown in FIG. 1, is disposed below the auxiliary absorber 71 and the non-condensable gas tank 73, separates the gas flowing out of the gas-liquid discharge passage 76 from the absorbing liquid, and separates the separated gas into a gas discharge passage 78a. Through the non-condensable gas tank 73,
The absorption liquid in the absorption refrigeration cycle is moved by moving the separated absorption liquid through the absorption liquid return passage 78b so that the liquid surface in the absorber 19 and the liquid surface in the gas discharge passage 78a become the same. It is returned into the vessel 19.

The gas-liquid separator 72 of the present embodiment has a small-diameter pipe 7 extending from the pumping pipe 76a of the gas-liquid discharge passage 76.
9 and a large-diameter pipe 78 (a pipe forming a gas discharge passage 78a and an absorbent return passage 78b) covering the small-diameter pipe 79. Small diameter pipe 79 and large diameter pipe 7
8 is formed in a U-shape after being arranged in a double shape to constitute a gas-liquid separator 72. The large diameter pipe 78 has the same liquid level as that of the low liquid in the absorber 19, and the upper side from the liquid level is the gas discharge passage 78a, and the lower side is the absorbent return pipe 78b. In this embodiment, the open end of the small-diameter pipe 79 is set below the liquid level, and the non-condensable gas discharged from the small-diameter pipe 79 rises in the absorbing solution to be separated from the absorbing solution.
The liquid is guided to the non-condensable gas tank 73 through a. The opening end of the small-diameter pipe 79 may be above the liquid level, but in order to smoothly perform the siphon action in the auxiliary absorber 71, it is preferable that the lower end be large so that the head can be larger than the auxiliary absorber 71. .

[Operation of Embodiment] Next, the absorption type air conditioner 1
The operation of the cooling operation and the operation of the air extraction device 70 at the time of performing the cooling operation will be described. (Explanation of the operation of the cooling operation) When the absorption air conditioner 1 is started, the heating means 2 and the absorption refrigeration cycle 3 are operated by the operation of the electric functional components. Absorption refrigeration cycle 3
In other words, when the heating means 2 heats the boiler 14, the high-temperature regenerator 15 takes out the vaporized refrigerant from the low liquid, and the low-temperature regenerator 16 takes out the high liquid from the middle liquid.

The vaporized refrigerant taken out by the high-temperature regenerator 15 and the low-temperature regenerator 16 is condensed and liquefied by the condenser 17 and is then dispersed to the evaporator heat exchanger 42 of the evaporator 18 to be evaporated. The heat of vaporization is taken from the cold and hot water in 42 to evaporate. Therefore, the cooled hot and cold water that has passed through the evaporating heat exchanger 42 and is cooled is supplied to the indoor heat exchanger 54 of the indoor air conditioner 4 to cool the room.

The vaporized refrigerant evaporated in the evaporator 18 passes above the cylindrical partition wall 46 and flows into the absorber 19.
On the other hand, in the absorber 19, the high liquid taken out by the low-temperature regenerator 16 is dispersed to the absorption heat exchanger 44, and the high liquid absorbs the vaporized refrigerant flowing from the evaporator 18. Note that the absorption heat generated when the vaporized refrigerant is absorbed by the high liquid is absorbed by the absorption heat exchanger 44, thereby preventing the absorption capacity from lowering. The high liquid that has absorbed the vaporized refrigerant in the absorber 19 becomes a low liquid, is sucked by the solution pump 48, is returned into the evaporator 14, and repeats the above cycle.

(Explanation of the operation of the extraction device 70) During the cooling operation by the absorption refrigeration cycle 3, since the vaporized refrigerant is absorbed by the high liquid, the inside of the absorber 19 is in a negative pressure state as compared with the inside of the evaporator 18. When the vaporized refrigerant evaporated in the evaporator 18 passes above the cylindrical partition wall 46 and flows into the absorber 19, as shown in FIG.
An airflow indicated by arrow A is generated. On the other hand, in the absorption-type refrigeration cycle 3, corrosion is caused little by little by the action of the highly corrosive absorbing liquid, and non-condensable gas is generated. Then, the generated non-condensable gas is absorbed by the absorber 1 by an air current indicated by an arrow A in FIG.
9 at the bottom.

Here, the refrigeration capacity of the absorption refrigeration cycle 3 is low, the supply amount of the high liquid supplied to the absorbent sprayer 45 is small, and the liquid level of the high liquid in the absorbent sprayer 45 is smaller than the predetermined amount α. If it is low, the high liquid supplied to the absorbent sprayer 45 is not supplied to the auxiliary absorber 71, and all of the high liquid is sprayed into the absorber 19. As a result, the bleed device 70 does not operate. That is, all of the high liquid supplied to the absorbent sprayer 45 is sprayed into the absorber 19 and contributes to the cooling capacity of the cooling operation.

In the case where the refrigeration capacity of the absorption refrigeration cycle 3 is high and the supply amount of the high liquid supplied to the absorbent sprayer 45 is large, and the liquid level of the high liquid in the absorbent sprayer 45 is higher than the predetermined amount α. A part of the high liquid supplied to the absorbent sprayer 45 (about 5% at the maximum) forms a liquid pipe 75 constituting an absorbent introduction passage 75.
a is supplied into the auxiliary absorber 71 through the orifice 75c, and the remaining high liquid is sprayed into the absorber 19.

When the high liquid is supplied into the auxiliary absorber 71, the liquid level of the high liquid in the auxiliary absorber 71 rises.
When the liquid surface of the high liquid reaches the top of the gas-liquid suction passage 76b, the high liquid flows into the gas-liquid discharge passage 76, and the pumping pipe is continued until the liquid surface of the high liquid falls to the upper end of the gas-liquid suction port 76c. 7
It falls down from 6a. By the action of the high liquid dropping down the pumping tube 76a, the gas in the auxiliary absorber 71 is sucked into the gas-liquid discharge passage 76 (gas-liquid suction passage 76b),
The next time the high liquid falls, it falls into the gas-liquid separator 72 together with the high liquid. The non-condensable gas and the high liquid that have fallen into the gas-liquid separator 72 are separated by the gas-liquid separator 72, and the separated non-condensable gas is stored in the non-condensable gas tank 73. Is returned to the bottom. On the other hand, when the gas in the auxiliary absorber 71 is sucked into the gas-liquid discharge passage 76, the non-condensable gas accumulated in the lower part of the absorber 19 is sucked into the auxiliary absorber 71 from the gas introduction passage 74.

[Effects of the Embodiment] The bleeding device 70 is used when the flow rate of the absorbing liquid supplied to the absorbing liquid spraying device 45 is large and a sufficiently high liquid can be sprayed from the absorbing liquid spraying device 45 into the absorber 19. It works automatically only for a limited time. That is, the operation of the air extraction device 70 can minimize the decrease in the refrigeration capacity due to the decrease in the amount of the high liquid sprayed in the absorber 19. Therefore,
When the flow rate of the absorbing liquid supplied to the absorbing liquid sprayer 45 is small, the bleeding device 70 does not operate, and it is possible to prevent a decrease in the refrigeration capacity due to the operation of the bleeding device 70 when the small capacity operation state continues. it can.

Since the auxiliary absorber 71 is provided inside the absorber 19, even if air-tight leakage occurs at each joint of the auxiliary absorber 71, air may enter the absorption refrigeration cycle. Does not occur. That is, there is no problem that air enters from the auxiliary absorber 71, and the reliability of the absorption air conditioner 1 can be improved.

By cooling the auxiliary absorber 71 with the cooling water pipe 77, the absorption heat generated when the vaporized refrigerant is absorbed by the absorbing liquid in the auxiliary absorber 71 is removed, thereby preventing the absorption capacity from lowering. Therefore, the vaporized refrigerant can be reliably absorbed by the absorbing liquid in the auxiliary absorber 71. As a result, the vaporized refrigerant in the gas supplied to the gas-liquid separator 72 is reliably removed, and only the non-condensable gas can be sent from the gas-liquid separator 72 to the non-condensable gas tank 73. This makes it possible to delay the time when the non-condensable gas tank 73 is full, to reduce the frequency of degassing work from the non-condensable gas tank 73, and to improve the ability to convey the non-condensable gas.

The auxiliary absorber 71 is connected to two press-formed plates 71
Since it is provided flat along with a, it is possible to avoid an increase in the volume of the absorber 19 accommodating the auxiliary absorber 71. Gas-liquid suction passage 76b provided upstream of gas-liquid discharge passage 76
The non-condensable gas in the auxiliary absorber 71 is supplied to the gas-liquid separator 72 by the siphon action of
The non-condensable gas therein can be guided into the auxiliary absorber 71 via the gas introduction passage 74. Therefore, a device (for example, a pump device) for guiding the non-condensable gas in the absorption refrigeration cycle 3 to the gas-liquid separator 72 via the auxiliary absorber 71 becomes unnecessary, and the non-condensable gas is extracted into the non-condensable gas tank 73. Cost can be kept low.

[Modification] In the above embodiment, the auxiliary absorber 71 is formed by joining two press-formed plates 71a. However, the auxiliary absorber 71 is formed of another container such as a tube or a box. May be. In the above embodiment, the example in which the auxiliary absorber 71 is arranged in the absorber 19 has been described, but the auxiliary absorber 71 may be arranged in the evaporator 18.

In the above embodiment, the cooling water pipe 77 diverted from the absorption heat exchanger 44 was used as an example of the cooling means, but another cold member was brought into contact with the auxiliary absorber 71 or the like to reduce the absorbed heat. It may be provided to take away. In the above embodiment, the cooling means is provided to cool the central portion of the auxiliary absorber 71. However, the cooling means may be brought into contact with the end of the press-formed plate 71a for cooling.

In the above embodiment, the non-condensable gas is
Although the example in which the gas inlet passage 74 is provided so as to accumulate at the lower portion of the gas inlet 9 and the gas suction passage 74 is provided at the lower portion of the absorber 19 is shown, non-condensable gas is supplied to other portions (for example, the upper portion of the absorber). It may be provided so as to store the gas, and an opening for sucking the gas in the gas introduction passage 74 may be provided in a portion where the non-condensable gas is stored.

In the above embodiment, the brazing of the bleed tube 74a and the pumping tube 76a was performed at the time of brazing the press-formed plate 71a, but it may be merely fitted. Also, the liquid pipe 75a may be integrally brazed, or may be crimped and joined to the auxiliary absorber 71.

In the above embodiment, the double-effect absorption refrigeration cycle 3 has been described as an example of the absorption refrigeration cycle. However, a single-effect absorption refrigeration cycle may be used.
A triple effect or more multi-effect absorption refrigeration cycle may be used.
When injecting the middle liquid into the low-temperature regenerator, the low-temperature regenerator 1
Although the example of injecting from above is shown above, it is also possible to inject from below.

As a heating source of the heating means 2, a gas burner 11
However, an oil burner or an electric heater may be used, or exhaust heat of another device (for example, an internal combustion engine) may be used. Although the example in which the heat exchanger for condensation 37, the heat exchanger for evaporation 42, and the heat exchanger for absorption 44 are provided in a coil shape has been described, other types of heat exchangers such as a tube and fin or a stacked heat exchanger are used. May be used.

Although an aqueous lithium bromide solution has been described as an example of the absorbing solution, other absorbing solutions such as an aqueous ammonia solution using ammonia as a refrigerant and water as an absorbent may be used. Although an example in which tap water is used as an example of the heat medium and shared with the cooling water of the cooling water circuit 62 has been described, another heat medium such as antifreeze or oil different from the cooling water of the cooling water circuit may be used.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a bleeding device.

FIG. 2 is a schematic configuration diagram of an absorption type air conditioner.

FIG. 3 is a side view of an auxiliary absorber.

FIG. 4 is a top view of the auxiliary absorber.

FIG. 5 is a perspective view of a main part of an auxiliary absorber.

FIG. 6 is a cross-sectional view of a main part showing a joined state of the absorbing liquid introduction passage and the absorbing liquid spraying tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorption air conditioner 2 Heating means 3 Absorption refrigeration cycle 15 High temperature regenerator 16 Low temperature regenerator 17 Condenser 18 Evaporator 19 Absorber 45 Absorbent spraying tool 48 Solution pump 70 Extraction device 71 Auxiliary absorber 71a Press molding plate 72 Gas-liquid separator 73 Non-condensable gas tank 74 Gas introduction passage 75 Absorption liquid introduction passage 76 Gas-liquid discharge passage 76b Gas-liquid suction passage 76c Gas-liquid suction port 77 Cooling water pipe (cooling means)

Continuation of the front page (56) References JP-A-53-4249 (JP, A) JP-A-9-61012 (JP, A) JP-A-55-91468 (JP, U) JP-B-57-3864 (JP) , B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 43/04 F25B 37/00 F25B 15/00

Claims (5)

(57) [Claims] A) a heating means for heating the absorbing liquid; b) a regenerator for heating the absorbing liquid with the heating means to vaporize a part of the absorbing liquid; and cooling the vaporized refrigerant generated in the regenerator. A condenser that liquefies and evaporates the liquefied refrigerant liquefied by the condenser under a low pressure; an absorber that absorbs the vaporized refrigerant evaporated by the evaporator into an absorbing liquid; A solution pump for pumping the solution to a regenerator is provided. The solution pump is provided above the absorber and supplied to the absorber.
Of the absorbed liquid, due to the low pressure environment in the absorber.
An absorption-type refrigeration cycle provided with an absorption-liquid dispersing device for dispersing the absorption liquid condensed after the part has boiled and evaporated ; c) an opening inside the absorption-type refrigeration cycle, A) a gas introduction passage for introducing a condensed gas; d) an absorption liquid introduction passage connected to the absorption liquid dispersion device and introducing a part of the absorption liquid supplied to the absorption liquid dispersion device; and e) the gas introduction passage. And an absorption liquid supply passage connected to the non-condensable gas and the absorption liquid supplied by the gas introduction passage and the absorption liquid introduction passage; and f) connected to the auxiliary absorber, A gas-liquid discharge passage for alternately discharging the non-condensable gas and the absorption liquid supplied into the auxiliary absorber; g) a non-condensable gas tank for storing the non-condensable gas; h) non-condensation flowing from the gas-liquid discharge passage Gas and absorbent Release, leading the separated noncondensable gas to the non-condensable gas tank, a gas-liquid separator for guiding the separated absorbing liquid to the absorption refrigerating cycle, the upper end of the absorption liquid introduction passage, the effect of the boil receive
An absorption type air conditioner characterized in that the absorption type air conditioner is opened above a bottom of the absorption liquid disperser at a portion where the liquid level of the absorption liquid is stable, away from a part . 2. The absorption air conditioner according to claim 1, wherein said auxiliary absorber is disposed inside said absorption refrigeration cycle. 3. The absorption-type air conditioner according to claim 2, wherein the auxiliary absorber has a flat shape in which two press-formed plates are joined, and the gas introduction passage, the absorption liquid introduction passage, and the gas liquid An absorption type air conditioner, wherein each connection port of the discharge passage is formed when the two press-formed plates are combined. 4. The absorption type air conditioner according to claim 1, wherein the auxiliary absorber is cooled by cooling means, and the vaporized refrigerant introduced inside together with the non-condensable gas is absorbed in the absorption liquid. An absorption-type air conditioner characterized in that heat of absorption generated when the air-conditioning is performed is removed. 5. The absorption-type air conditioner according to claim 1, wherein the gas-liquid discharge passage is configured to reduce the absorption liquid introduced into the auxiliary absorber to fall downward. A gas-liquid suction port for sucking the absorbing liquid and the non-condensable gas in the auxiliary absorber is provided downward, and falls from the gas-liquid discharge passage to the gas-liquid separator. An absorption air conditioner, wherein the non-condensable gas in the auxiliary absorber is sucked into the gas-liquid discharge passage from the gas-liquid inlet by the action of the absorbing liquid.