JPH09126577A - Absorption type air conditioning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability by abolishing a drain valve with higher frequency of opening or closing while restricting the concentration of cooling water cooled by an evaporation type cooling column. SOLUTION: A cooling water tank 65 below a cooling column 61 is provided with a first water suction port which is opened at a specified water level within the tank and an inverted U shaped first siphon path 66 having a first drain port opened outside the tank. When the water level in the cooling water tank 65 is down to a low level lower than the first water suction port, the cooling water is supplied into the cooling water tank 65 until a specified time passes after reaching a high level at the top of the first siphon path 66. As the water level passes the top of the first siphon path 66, the first siphon path 66 generates a siphon action to discharge the cooling water to the water level at the first water suction port. Thus, the cooling water intended for replenishing and the cooling water intended for discharging are supplied to the cooling water tank 65 to dilute the cooling water each time the water level of the cooling water reaches the low level without using a drain valve.

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 an interior of a room by using an absorption type refrigeration cycle, and in particular, for absorbing absorption heat and condensing vaporized refrigerant in the absorption type refrigeration cycle. The present invention relates to a technology for cooling cooling water.

[0002]

2. Description of the Related Art In an absorption refrigeration cycle, absorption heat generated when the vaporized refrigerant is absorbed in an absorbing liquid is absorbed in an absorber, and a condenser is cooled to cool the vaporized refrigerant to be liquefied and condensed. Water is used. This cooling water is cooled in a cooling tower installed outside the absorption refrigeration cycle and reused. That is, the cooling water is heated in the absorption refrigeration cycle and circulates in the cooling water circuit cooled in the cooling tower.
As a cooling tower for cooling the cooling water, an evaporation type is widely used in which the cooling water is exposed to the outside air to radiate heat, and a part of the cooling water is evaporated to remove the heat of vaporization from the cooling water to cool the cooling water. Has been.

[0003]

In the above evaporative cooling tower, since the cooling water comes into contact with the outside air as described above, dust, soot, etc. contained in the outside air adhere to the cooling water and the cooling water becomes dirty. . On the other hand, in the evaporative cooling tower, a part of the cooling water evaporates and escapes to the outside air as described above. Therefore, the mineral components (Mg, Si, Ca contained in the cooling water and supplied only by supplementing the cooling water every time the cooling water evaporates and decreases.
Etc.), or dust and soot mixed in, the concentration of the cooling water in the cooling water circuit gradually increases.

When the concentration of the cooling water becomes high due to impurities such as dust and soot, there is a possibility that a foul odor is generated from the cooling tower due to the contamination of the cooling water or the cooling water circuit is clogged with impurities.
Therefore, in the case of cooling the cooling water using an evaporative cooling tower, a drain port is provided at the bottom of the cooling water tank in which the cooling water is stored, and a drain valve that opens and closes this drain port is opened to cool the cooling water. A part of the water was drained, then the drain valve was closed, and a blow-down operation was newly performed to replenish the cooling water tank with cooling water to prevent the concentration of cooling water from rising.

As described above, the drain valve is opened and closed for each blowdown during the operation of the absorption refrigeration cycle in order to prevent the concentration of the cooling water from increasing. However, the drain valve provided at the bottom is liable to cause a failure due to the admixture of dust and soot mixed therein, and is frequently opened and closed, so that the durability of the drain valve is likely to deteriorate.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. An object of the present invention is to suppress the concentration of cooling water cooled by an evaporative cooling tower and to open and close a drain valve at the bottom, which is frequently opened and closed. It is to provide an absorption type air conditioner with improved durability as well as abolishing the above.

[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] The absorption air conditioner comprises: a) heating means for heating the absorbing liquid; and b) a regenerator for heating a portion of the absorbing liquid by this heating means, and a regenerating device for regenerating the absorbing liquid. A condenser that cools and liquefies the vaporized refrigerant generated in the condenser, an evaporator that evaporates the liquefied refrigerant liquefied by this condenser under low pressure, an absorber that absorbs the vaporized refrigerant vaporized by this evaporator into an absorption liquid, An absorption type refrigeration cycle equipped with a solution pump for pumping the absorption liquid in the absorber to the regenerator, and c) taking absorption heat in the absorber and circulating cooling water for cooling the vaporized refrigerant in the condenser. A cooling water circuit; d) an evaporative cooling tower provided in this cooling water circuit for exposing the cooling water to the outside air to radiate heat; and e) a cooling water tank provided in the cooling water circuit for storing the cooling water. F) This cooling water tank A water supply means for supplying a predetermined amount of cooling water therein; g) a first water inlet opening in the cooling water tank, and a first drain outlet for guiding the cooling water to the outside of the cooling water tank, An inverted U-shaped first siphon passage that connects the first water intake port and the first drain port is provided.

[Means for Claim 2] The absorption type air conditioner according to Claim 1 is provided with overflow means for discharging the cooling water, which has risen above the top of the first siphon passage, to the outside of the cooling water tank. Characterize.

[Means for Claim 3] The absorption type air conditioner according to claim 1 or 2 includes a low level sensor for detecting a low level water level lower than the first water intake port in the cooling water tank, and The first in the cooling water tank
When a high level sensor that detects a high level water level slightly lower than the water level at the top of the siphon passage and a signal that the low level sensor detects the low level water level are given, the high level sensor detects the high level water level and then Control means for supplying cooling water from the water supply means into the cooling water tank until a predetermined amount is supplied.

[Means for Claim 4] The absorption type air conditioner according to claim 1 or claim 2 has a low level sensor for detecting a low level water level lower than that of the first water intake port in the cooling water tank; Control means for supplying the cooling water from the water supply means into the cooling water tank until a predetermined amount is supplied after the low level sensor detects the low level water level.

[Means for Claim 5] The absorption type air conditioner according to claim 1 or claim 2 has a low level sensor for detecting a low level water level lower than the first water intake port in the cooling water tank; The first in the cooling water tank
When a high level sensor that detects a high level water level slightly higher than the top of the siphon passage and a signal that the low level sensor detects the low level water level are given, the water supply is continued until the high level sensor detects the high level water level. Control means for supplying cooling water from the means into the cooling water tank.

[Means of Claim 6] The absorption type air conditioner according to claim 1 or 2 is provided with a counter for counting the operating time of the absorption refrigeration cycle, and every time the count time by this counter reaches a set time. In addition, the cooling water is supplied from the water supply means into the cooling water tank by a predetermined amount of cooling water that can reach the top water level at which the siphon operates.

[Means for Claim 7] The absorption type air conditioner according to any one of claims 1 to 6 is provided with an on-off valve for opening and closing the first siphon passage, and the cooling is lower than the first water supply port. An inverted U-shape that includes a second water inlet opening at a lower part in the water tank and a second water outlet for guiding cooling water to the outside of the cooling water tank, and connects the second water inlet and the second water outlet. And a second siphon passage of
The first siphon passage and the second siphon passage are
A common passage is provided, and the opening / closing valve opens / closes the first water intake port.

[0014]

[Operation and effect of the invention]

[Operation and effect of claim 1] When a predetermined amount of cooling water is supplied from the water absorbing means to the cooling water tank and the water level in the cooling water tank exceeds the top of the first siphon passage, the siphon operation by the first siphon passage is performed. Occurs, the cooling water in the cooling water tank is sucked from the first water intake port, and is drained from the first drain port via the first siphon passage. When the water level in the cooling water tank reaches the first water intake port, the generation of the siphon action by the first siphon passage is stopped, and the drainage of the cooling water by the first siphon passage is stopped.

In this absorption type air conditioner, it is possible to prevent the concentration of the cooling water from increasing without using the drain valve at the bottom, which was frequently opened and closed. Therefore, the failure probability in the means for preventing the concentration increase of the cooling water can be suppressed to be low, and as a result, the reliability of the absorption air conditioner can be improved.

[Operation and Effect of Claim 2] When the first siphon passage (or the second siphon passage according to claim 7) is closed, the first siphon passage (or the second siphon passage even if the water level exceeds the top of the siphon passage). (2 siphon passage) The water level rises without the siphon action, but
When the water level exceeds a predetermined level, the cooling water is discharged to the outside of the cooling water tank by the overflow means. Therefore, even if the first siphon passage (or the second siphon passage) is closed, the problem that the cooling water overflows into the absorption air conditioner can be eliminated.

[Operation and Effect of Claim 3] As the cooling water evaporates in the cooling tower, the water level in the cooling water tank decreases. When the water level in the cooling water tank drops to the low level water level, the low level sensor outputs a signal indicating that the water level has dropped to the low level water level to the control device. Then, the control device outputs a signal indicating that the water level in the cooling water tank reaches the high level water level to the control device, and thereafter, until a predetermined amount of cooling water is supplied to the cooling water tank. The water supply means supplies new cooling water to the cooling water tank.

As described above, when the water level in the cooling water tank exceeds the top of the first siphon passage, the siphon action is generated by the first siphon passage, and the cooling water passing through the first water intake port is drained from the first siphon. . in this way,
Since the low-level sensor performs blowdown operation when it detects a low-level water level, if the amount of evaporation in the cooling tower is large, the frequency of lowering to the low-level water level will be high and blowdown operation will also be performed frequently. When the amount is small, the blowdown operation is also small. As a result, excessive blowdown operation can be suppressed and waste of cooling water supply can be eliminated.

[Operation and Effect of Claim 4] As the cooling water evaporates in the cooling tower, the water level in the cooling water tank decreases. When the water level in the cooling water tank drops to the low level water level, the low level sensor outputs a signal indicating that the water level has dropped to the low level water level to the control device. Then, the control device supplies new cooling water to the cooling water tank until a predetermined amount of cooling water is supplied to the cooling water tank.

As described above, when the water level in the cooling water tank exceeds the top of the first siphon passage, the siphon action is generated by the first siphon passage, and the cooling water passing through the first water intake port is drained from the first siphon. . in this way,
Since the low-level sensor performs blowdown operation when it detects a low-level water level, if the amount of evaporation in the cooling tower is large, the frequency of lowering to the low-level water level will be high and blowdown operation will also be performed frequently. When the amount is small, the blowdown operation is also small. As a result, excessive blowdown operation can be suppressed and waste of cooling water supply can be eliminated.

[Operation and Effect of Claim 5] As the cooling water evaporates in the cooling tower, the water level in the cooling water tank decreases. When the water level in the cooling water tank drops to the low level water level, the low level sensor outputs a signal indicating that the water level has dropped to the low level water level to the control device. Then, the control device supplies new cooling water to the cooling water tank by the water supply means until the high level sensor outputs a signal indicating that the water level in the cooling water tank has reached the high level water level to the control device.

As described above, when the water level in the cooling water tank exceeds the top of the first siphon passage, the siphon action is generated by the first siphon passage, and the cooling water passing through the first water intake port is drained from the first siphon. . in this way,
Since the low-level sensor performs blowdown operation when it detects a low-level water level, if the amount of evaporation in the cooling tower is large, the frequency of lowering to the low-level water level will be high and blowdown operation will also be performed frequently. When the amount is small, the blowdown operation is also small. As a result, excessive blowdown operation can be suppressed and waste of cooling water supply can be eliminated.

[Operation and effect of claim 6] Regardless of the water level in the cooling water tank, the amount of water operated by the siphon changes from the water supply means to the cooling water tank every time the operating time of the absorption refrigeration cycle reaches the set time. To reduce the concentration of the cooling water in the cooling water tank. As a result, the concentration increase of the cooling water can be suppressed without using the water level sensor, and the cost of the absorption type air conditioner can be suppressed low.

[Operation and Effect of Claim 7] Cooling water is supplied from the water supply means into the cooling water tank with the first siphon passage closed by the on-off valve. When the water level in the cooling water tank exceeds the top of the second siphon passage, the siphon action of the second siphon passage occurs, and the cooling water in the cooling water tank is lower than the first suction port at the bottom of the cooling water tank. The water is sucked in from the two water suction ports and discharged from the second drain port through the second siphon passage. When the water level in the cooling water tank reaches the second water intake port, the generation of the siphon action by the second siphon passage is stopped, and the drainage of the cooling water by the second siphon passage is stopped.

Since the cooling water discharged from the second siphon passage is discharged to the outside from the lower portion of the cooling water tank via the second siphon passage, unnecessary substances accumulated in the lower portion of the cooling water tank are removed from the cooling water tank. It can be discharged to the outside. Moreover, since almost all of the cooling water in the cooling water tank can be replaced, the cooling water circuit can be efficiently washed.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an absorption type air conditioner of the present invention will be described based on an embodiment shown in the drawings. [Structure of First Embodiment] FIGS. 1 to 6 show the first embodiment. FIG. 1 is a schematic structure of an absorption air conditioner using a double-effect absorption refrigeration cycle for air conditioning the room. It is a figure.

(Schematic Description of Absorption Type Air Conditioner 1) The absorption type air conditioner 1 to which this embodiment is applied is a relatively small type used for home use, and is roughly classified into absorption liquid (this embodiment). Then, the heating means 2 for heating the lithium bromide solution), the double-effect absorption refrigeration cycle 3, and the cold / hot water cooled or heated in the absorption refrigeration cycle 3 (heat medium for cooling / heating the room, main 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 (water vapor in this embodiment) in the absorption refrigeration cycle 3. And a control device 6 for controlling each of the mounted electric functional parts.

(Explanation of Heating Means 2) The heating means 2 of this embodiment is a gas combustion apparatus that combusts a gas which is a fuel to generate heat and heats the absorbing liquid by the generated heat. It comprises a gas burner 11 for performing, a gas supply means 12 for supplying gas to the gas burner 11, a combustion fan 13 for supplying 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 boiling device 14 of the absorption refrigeration cycle 3, and the boiling device 14 is heated.
It is provided so as to heat the low-concentration absorption liquid (hereinafter, low liquid) supplied therein.

(Explanation of Absorption Refrigeration Cycle 3) The absorption refrigeration cycle 3 comprises a boiling device 14 heated by the heating means 2, and the low liquid supplied to the boiling device 14 is heated to reduce the temperature. Utilizing the high temperature regenerator 15 that vaporizes (evaporates) the refrigerant (water) contained in the liquid into a medium-concentration absorption liquid (hereinafter, medium liquid) and the condensation heat of the vaporized refrigerant in the high temperature regenerator 15, The low temperature regenerator 16 that heats the medium liquid supplied from the high temperature regenerator 15 side by utilizing the pressure difference and vaporizes the refrigerant contained in the medium liquid to turn the medium liquid into a highly concentrated absorbing liquid (hereinafter, high liquid) 16. And 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.

(Description of High Temperature Regenerator 15) 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 wall 2 removes heat as vaporization heat at the time of evaporation of the middle liquid in the low temperature regenerator 16 and is cooled to become a liquefied refrigerant (water).

In the high-temperature regeneration container 22, the middle liquid in the boiling cylinder 21 after the refrigerant in the low liquid is vaporized by being heated by the boiling device 14 and the liquefied refrigerant (water) accumulated around it are insulated. In order to do so, a heat insulating partition cylinder 24 is provided around the boiling cylinder 21. The heat insulating partition cylinder 24 has an upper end joined to the upper end of the boiling cylinder 21 and a lower end spaced apart from the boiling cylinder 21 so that air can enter between the boiling cylinder 21 and the heat insulating partition cylinder 24. Has 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.

(Description of Low Temperature Regenerator 16) Low Temperature Regenerator 16
Is provided with a low temperature regeneration container 31 in the shape of a tubular container that covers 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 diaphragm 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 medium liquid supplied through the medium liquid pipe 26 toward the ceiling portion of the high temperature regeneration container 22. The temperature inside the low temperature regeneration container 31 is the same as that of the high temperature regeneration container 2.
Since the temperature is lower than the temperature inside 2, the pressure inside the low temperature regeneration container 31 is lower than the pressure inside 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 portion 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 and becomes a vaporized refrigerant, and remains. 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 by 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.

(Description of Condenser 17) The condenser 17 is covered with a condensing container 32 in the shape of an annular container. 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, below the condensing container 32, the refrigerant is supplied from the above-mentioned 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.

(Description of Evaporator 18) The evaporator 18 is provided below the condensing container 32 together with the absorber 19, and is formed by an evaporative absorption container 41 in the shape of an annular container provided around the low temperature regeneration container 31. Is 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 / 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 evaporation / absorption container 41 is maintained in a substantially vacuum (for example, 6.5 mmHg), the boiling point is low, and the liquefied refrigerant dispersed in the evaporation heat exchanger 42 is very easily evaporated. 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.

(Description of Absorber 19) The absorber 19 is covered with the evaporative 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 No. 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, there is arranged an annular absorbent dispersion device 45 for distributing the high liquid supplied from the high liquid pipe 34 to the absorption heat exchanger 44. The high liquid sprayed on the absorption heat exchanger 44, while traveling down the coil surface of the absorption heat exchanger 44 and falling from above to below, removes the vaporized refrigerant generated by evaporation in the evaporation heat exchanger 42. Absorb. As a result, the absorption liquid that has fallen to the bottom of the evaporative absorption container 41 becomes a low concentration liquid with a low concentration.

Inside the evaporation / absorption container 41, the cylindrical partition wall 4 is provided between the evaporation heat exchanger 42 and the absorption heat exchanger 44.
6 are arranged. The tubular partition wall 46 communicates with the inside of the evaporation / absorption container 41 only at the upper side, and the vaporized refrigerant generated in the evaporator 18 is guided into the absorber 19 via the upper portion of the tubular partition wall 46. .

A low liquid pipe 47 for supplying the low liquid at the bottom of the evaporation / absorption container 41 to the evaporator 14 is connected to the bottom of the evaporation / 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.

(Explanation of Components Other Than Above Above 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 the inside to the low-temperature regenerator 16 and the low liquid flowing from the absorber 19 to the boiler 14.
It is a heat exchanger in which 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 boiling device 14 are integrated. 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 conversely heats the low liquid flowing from the absorber 19 to the boiling device 14.

Further, the absorption refrigeration cycle 3 of this embodiment is provided with heating operation means for performing heating operation in addition to the cooling operation by the above-mentioned 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.

(Description of Indoor Air Conditioning Unit 4) Indoor Air Conditioning Unit 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, and a cold / hot water pump 57 for circulating cold / hot water is provided in the cold / hot water circuit 56. The cold / hot water pump 57 is driven by a dual-purpose motor that drives the solution pump 48.

The cold / hot water circuit 56 is a water pipe for guiding the cold / hot water that has passed through the evaporator 18 to the indoor heat exchanger 54 and again for the cold / hot water having exchanged heat with the indoor air to the evaporator 18. Inside, the indoor heat exchanger 54 and the cold / hot water pump 57
In addition to the above, the cold / hot water is stored and has a function as an expansion tank at the time of heating, and a cis-turn 58 for supplementing the cold / hot water is provided in the cold / hot water circuit 56.

A water supply pipe 59 for supplying cold / hot water (tap water) to the inside is connected to the systern 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 system turn 58 includes a water level sensor (not shown), and when the level of the cooling water in the system turn 58 drops, the water supply valve 60 is provided.
To open and refill the cistern 58 with cold and hot water. Further, the systern 58 is provided with overflow water supply means 59a for guiding the overflowing cold and warm water as cooling water into the cooling water tank 65 described later. That is, the water supply pipe 59 and the overflow water supply means 59a constitute a water supply means for supplying cooling water into the cooling water tank 65.

(Explanation of Cooling Water Cooling Unit 5) The cooling water cooling unit 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 from the upper side to the lower side to exchange heat with the outside air to radiate heat while flowing, and also to partially evaporate while flowing, and cooling that flows at the time of evaporation. A sprinkling section 61 for cooling the flowing cooling water by removing the heat of vaporization from the water, and sprinkling the cooling water on the upper side.
a, an evaporating section 61b having a large surface area through which cooling water flows, and a collecting section 61c for collecting the cooling water that has passed through the evaporating section 61b.
It is composed of In addition, the cooling tower 61 includes the evaporation unit 6
1b is provided with a cooling water fan 64 that promotes the evaporation and cooling of the cooling water in the evaporation section 61b.

The cooling water circuit 62 passes the absorber 19 and the condenser 17 and cools the temperature of the cooling water which has risen.
1, which is a water pipe for sending the cooling water cooled in 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. This cooling water tank 65 is located below the cooling tower 61
8 is provided below the cooling tower 61, and is provided so that the cooling water that has passed through the cooling tower 61 is supplied and the water that overflows at the cistern 58 is supplied.

In the cooling water tank 65, as shown in FIG. 2, a first siphon passage 66 for discharging a part of the cooling water to the outside by a siphon action and a second siphon for discharging a part of the cooling water to the outside. A passage 67 is provided.
The first siphon passage 66 has a first water inlet 66a that opens at a water level a where a predetermined amount (for example, 14 liters) of cooling water is stored in the cooling water tank 65, and a first opening that opens near the bottom of the cooling water tank 65. An inverted U-shaped passage provided with a drainage port 66b. The top of the first siphon passage 66 has a predetermined amount of cooling water in the cooling water tank 65 (for example, 16 liters).
It is provided at the stored water level b.

The second siphon passage 67 of this embodiment has a passage partially in common with the first siphon passage 66, and the second siphon passage 67 has a second water suction port that opens at the bottom of the cooling water tank 65. 67a and an inverted U-shaped passage provided with a second drain outlet 67b opening near the bottom of the cooling water tank 65. The top of the second siphon passage 67 has the same water level as the top of the first siphon passage 66. The second drain port 67b is common with the first drain port 66b.

The first water suction port 66a has the first water suction port 6a.
By opening and closing 6a, the first siphon passage 66
An on-off valve 68 is provided for closing and closing the second siphon passage 67 to function. The on-off valve 68 is provided for the cooling water circuit 6 at regular intervals (for example, the cooling operation is performed every 72 hours).
It is closed at the time of cleaning of No. 2 and at the time of switching from cooling to heating, and is provided so as to replace almost all of the cooling water in the cooling water tank 65 (cleaning function described later). As a result, the opening / closing frequency of the opening / closing valve 68 is very low.

In the cooling water tank 65, the first and second
The overflow means 69 is provided for discharging the cooling water rising above the tops of the siphon passages 66 and 67 to the outside of the cooling water tank 65. Overflow means 6 of this embodiment
9 is a predetermined amount of cooling water in the cooling water tank 65 (for example, 1
(8 liters) The cooling water that has risen above the stored water level c is provided to the outside of the absorption air conditioner 1 through the drainage passage 70. In this embodiment, the first and second drainage ports 66b and 67b are provided so as to open in the overflow means 69, and the first and second drainage ports 66 are provided.
The cooling water flowing out from b and 67b is discharged to the outside of the absorption air conditioner 1 through the drainage passage 70.

Further, the cooling water tank 65 has a low level water level d set lower than that of the first water intake port 66a (for example, a water level of 12 liters, which is 2 liters less than the water level a of the first water intake port 66a). Low level sensor 7 to detect
1 and a high-level sensor 72 that detects a high-level water level set higher than the low-level water level (for example, a 16-liter water level b ′ that is 4 liters higher than the low-level water level d). The high level water level b '
Is set to be slightly lower than the water level b at the top of the first and second siphon passages 66, 67.

When the low level sensor 71 detects the low level water level d, the blowdown operation by the control device 6 is activated in response to the detection signal. In the blowdown operation by the control device 6, as shown in the flow chart of FIG. 4, the low level sensor 71 sets the low level water level d.
Is detected, the water supply valve 60 is opened (step S1,
S2). The water supply valve 60 is opened, and the water overflowing from the systern 58 is introduced into the cooling water tank 65 via the overflow water supply means 59a to replenish the cooling water tank 65 with the cooling water. When a predetermined time elapses after the high level sensor 72 detects the high level water level b ', the water supply valve 60 is closed (steps S3 and S4), and then the process returns. It should be noted that, for a predetermined time, from the high level water level b ′ to the water level b at the top of the first and second siphon passages 66, 67.
It may be a small time (for example, 2 seconds) required to reach.

When the water level in the cooling water tank 65 reaches the water level b at the top of the first and second siphon passages 66, 67, the siphon action by the first siphon passage 66 occurs,
The cooling water in the cooling water tank is sucked in through the first water suction port 66a, and the first drainage port 66 is passed through the first siphon passage 66.
It is drained from the drainage passage 70 via b. When the water level in the cooling water tank 65 drops to a water level a ′ (not shown) slightly lower than the water level a of the first water inlet 66a,
Air enters the first siphon passage 66 from the water suction port 66a and the generation of the siphon action stops, and the cooling water tank 65
The cooling water inside becomes the water level a ′.

(Explanation of Control Device 6) The control device 6 includes the above-mentioned refrigerant valve 39, solution pump 48 (cool / 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 amount control valve 73, gas on-off valve 74, ignition device 75
) 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.

The control device 6 is provided with a cleaning function for replacing almost all the cooling water in the cooling water tank 65 when the cooling operation is switched to the heating operation and when a cleaning switch (not shown) is turned on. Has been. As shown in the flowchart of FIG. 5, this cleaning function closes the opening / closing valve 68 and turns off the water supply valve 60 when the cooling operation is switched to the heating operation or when the cleaning switch is turned on (steps S11 and S12). Open (steps S13, S14).
The water supply valve 60 is opened, and the water overflowing from the systern 58 is introduced into the cooling water tank 65 via the overflow water supply means 59a to replenish the cooling water tank 65 with the cooling water. When a predetermined time elapses after the high level sensor 72 detects the high level water level b ′, the water supply valve 60 is closed (steps S15 and S16).

When the water level in the cooling water tank 65 exceeds the tops of the first and second siphon passages 66 and 67,
The siphon action is generated by the second siphon passage 67, the cooling water in the cooling water tank is sucked from the second water inlet 67 a near the bottom in the cooling water tank 65, and the second drain outlet is formed through the second siphon passage 67. 67b and drain passage 7
Drained from 0.

After the water supply valve 60 is closed, after a lapse of time when almost all the cooling water in the cooling water tank 65 is drained by the second siphon passage 67 (step S1).
7) Then, the water supply valve 60 is opened again (step S18). The water supply valve 60 is opened, and the water overflowing from the systern 58 is introduced into the cooling water tank 65 via the overflow water supply means 59a to replenish the cooling water tank 65 with the cooling water. When a predetermined time elapses after the high level sensor 72 detects the high level water level b '(step S19),
The water supply valve 60 is closed and the opening / closing valve 68 is opened (steps S20 and S21), and then the process returns. The opening / closing valve 68 may be opened after drainage and before the water supply valve 60 is opened.

When the water level in the cooling water tank 65 reaches the water level b at the top of the first and second siphon passages 66, 67, the siphon action by the first siphon passage 66 occurs as in the blowdown operation described above. Then, the cooling water in the cooling water tank 65 is sucked from the first water suction port 66a,
It is drained from the drainage passage 70 via the first siphon passage 66 and the first drainage port 66b. Then, when the water level in the cooling water tank 65 drops to the water level a of the first water intake port 66a, the on-off valve 68 is opened, so that the generation of the siphon action by the first siphon passage 66 is stopped and the cooling water tank The cooling water in 65 becomes the water level a.

[Operation of Embodiment] Next, the absorption type air conditioner 1
The operation of the cooling operation and the operation of the blowdown operation when performing this cooling operation will be described. (Explanation of Operation of 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 each electric functional component. Absorption type refrigeration cycle 3
As the heating means 2 heats the boiling device 14, the vaporized refrigerant is taken out by the high temperature regenerator 15 and the low temperature regenerator 16, and the high temperature liquid is taken out by the low temperature regenerator 16.

The vaporized refrigerant taken out by the high temperature regenerator 15 and the low temperature regenerator 16 is condensed in the condenser 17 and liquefied, and then sprayed to the evaporation heat exchanger 42 of the evaporator 18 to be evaporated. The heat of vaporization is taken from the cold and warm water in 42 to evaporate. Therefore, the cold / hot water that has passed through the evaporation heat exchanger 42 and is cooled is supplied to the indoor heat exchanger 54 of the indoor air conditioning unit 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 scattered on the absorption heat exchanger 44, and the vaporized refrigerant flowing from the evaporator 18 is absorbed by the high liquid. In addition, the absorption heat generated when the vaporized refrigerant is absorbed into the high liquid is absorbed by the absorption heat exchanger 44, and the reduction of the absorption capacity is prevented. 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 Operation of Blow-Down Operation) During the above cooling operation by the absorption refrigeration cycle 3, the cooling water heated by the condenser 17 and the absorber 19 is cooled by the cooling water fan in the evaporating section 61b of the cooling tower 61. The outside air blown by 64 forcibly dissipates heat, and part of the cooling water evaporates. Therefore, the cooling water having the water level a is gradually decreased by the previous cooling water blowdown operation.

When the cooling water evaporates and the water level in the cooling water tank 65 reaches the low level water level d, the controller 6 starts the blowdown operation. That is, the control unit 6 opens the water supply valve 60 to supply about 4 liters of cooling water up to the water level b to the cooling water tank 65. Of the supplied cooling water, the first 2 liters are used to replenish the cooling water tank 65, and the subsequent 2 liters of cooling water are used for dilution. Then, the excess cooling water used for dilution is discharged through the first siphon passage 66. At this time, the on-off valve 68 is closed to drain the water through the second siphon passage 67, and the low level sensor 7
When 1 detects the low level water level d, the on-off valve 68 is opened, the drainage is stopped, and the water is supplied to the water level a again, the drainage from the bottom can be performed.

Next, the equilibrium concentration of cooling water will be described. First, as shown in (a) of FIG. 6, the cooling water in the cooling water tank 65 reaches the water level a, the amount of cooling water in the cooling water tank 65 at this time is H, and the concentration ratio at this time is x. And Here, as shown in FIG. 6B, B amount of cooling water is added,
When the cooling water is diluted, the concentration ratio of the cooling water is expressed by the following equation. When B amount of cooling water is added, the B amount of cooling water is discharged from the first siphon passage 66 by siphon action, and as shown in (c) of FIG. 6, the cooling water in the cooling water tank 65 is It is returned to the water level a.

(Equation 1)

When the cooling water evaporates in the cooling tower 61 and the amount of the cooling water evaporates as shown in FIG. 6 (d) (when the water level in the cooling water tank 65 reaches the low level water level d). )
The concentration ratio of the cooling water of is expressed by the following equation.

(Equation 2)

Then, as shown in FIG. 6E, the concentration ratio of the cooling water when the amount of the cooling water is supplied to the cooling water tank 65 is represented by the following equation.

(Equation 3)

That is, in the equilibrium state, as shown in FIG.
The concentration ratio is the same as that in (e) of FIG. 6, and the concentration ratio x (ave) in the equilibrium state is expressed by the following equation. In this calculation setting condition, the amount of evaporation in the feed water is not expected, and the concentration in the cooling water tank 65 is uniform.

(Equation 4)

Here, when the cooling water in the cooling water tank 65 is at the water level a, the amount H of water is 14 liters, the amount E of water replenished by evaporation is 2 liters, and the amount B of water supplied for dilution.
Is, for example, 2 liters, the equilibrium state at this time is 2.14 when each value is substituted into the above equation 4 to obtain. On the other hand, the maximum concentration ratio is the above numerical values (water amount H =
(14 liters, water amount E = 2 liters, water amount B = 2 liters) is substituted into Equation 3 to obtain the maximum concentration ratio of 2.
33.

[Effects of the Embodiment] The absorption air conditioner 1 dilutes the cooling water in the cooling water circuit 62 by the siphon action of the first siphon passage 66. As a result, the drain valve can be eliminated, the cost can be suppressed, the malfunction of the drain valve can be prevented, and the reliability of the absorption air conditioner 1 can be improved.

When the low level sensor 71 detects the low level water level d, the control device 6 opens the water supply valve 60 to perform the blowdown operation. Therefore, when the evaporation amount in the cooling tower 61 is large, the blowdown operation is also performed. If the amount of evaporation is small, on the contrary, if the amount of evaporation is small, the amount of blowdown operation is also reduced.As a result, insufficient dilution can be prevented and excessive blowdown operation can be suppressed, eliminating waste of cooling water supply. You can

When the first siphon passage 66 or the second siphon passage 67 is blocked by dust or the like, the water level in the cooling water tank 65 is changed to the first and second siphon passages 6.
Even if it exceeds the top of 6, 67, the siphon action does not occur and the water level rises. However, when the cooling water in the cooling water tank 65 exceeds the water level c, the cooling water exceeding the water level c is discharged to the outside of the cooling water tank 65 by the overflow means 69. Therefore, even if the first siphon passage 66
Even if the second siphon passage 67 is closed, there is no problem that the cooling water overflows into the absorption air conditioner 1.

Further, in the present embodiment, the second siphon passage 67 is provided, and when switching from the cooling operation to the heating operation or by manual operation, almost all the cooling water in the cooling water tank 65 is replaced and the cooling water circuit is replaced. The inside of 62 can be washed. As a result, the inside of the cooling water circuit 62 can be easily washed, and at the time of this washing, since the cooling water is sucked from the vicinity of the bottom of the cooling water tank 65 and discharged to the outside, unnecessary substances accumulated in the lower portion of the cooling water tank 65 are collected. Can be discharged to the outside of the cooling water tank 65. Further, in the present embodiment, the first siphon passage 66 and the second siphon passage 67 are configured to be shared, so that the cost for the first siphon passage 66 and the second siphon passage 67 can be kept low.

In the first embodiment, the predetermined amount of water is supplied by time management, but the cooling water supplied to the cooling water tank 65 via the water supply pipe 59 is detected by a water amount sensor or the like. Alternatively, a predetermined amount of water supply may be managed by the water amount management.

[Second Embodiment] FIG. 7 is a schematic configuration diagram of a cooling water tank 65 showing a second embodiment. In the above-described first embodiment, an example in which the first siphon passage 66 and the second siphon passage 67 are provided in common is shown, but in this embodiment, the first siphon passage 66 and the second siphon passage are provided. 6
7 and 7 are provided separately.

[Third Embodiment] In the first and second embodiments described above, when the low level sensor 71 detects the low level water level d, the controller 6 opens the water supply valve 60 to perform the blowdown operation. In the present embodiment, the counter (not shown) in the control device 6 counts the cooling operation time, and the control is performed every time the count time by this counter reaches a preset time. Device 6
Opens the water supply valve 60 and supplies a predetermined amount of cooling water (at least, the amount of cooling water required to generate the siphon action by the first siphon passage 66) to the cooling water tank 65. Blow down operation is performed. The management of the predetermined amount may be water amount management using a water amount sensor or time management using a timer.

In this embodiment, the low level sensor 71 and the high level sensor 72 shown in the first and second embodiments can be eliminated, and the cost of the absorption type air conditioner 1 can be kept low by reducing the number of parts. You can

[Modification] In the above embodiment, when the low-level sensor 71 detects the low-level water level d, the control device is operated until a predetermined time elapses after the high-level sensor 72 detects the high-level water level b ′. 6 is the water supply valve 6
Although the example in which 0 is opened to supply the cooling water into the cooling water tank 65 is shown, the high level sensor 72 is abolished, and when the low level sensor 71 detects the low level water level d, thereafter, until a predetermined time elapses. The control device 6 has a water supply valve 60.
May be provided so that the cooling water is supplied into the cooling water tank 65.

Further, the high level sensor 72 is provided so as to detect a high level water level b ′ slightly higher than the top of the first siphon passage 66, and when the low level sensor 71 detects the low level water level d, the high level sensor 72 is The control device 6 may open the water supply valve 60 to supply the cooling water into the cooling water tank 65 until the high-level water level b ′ is detected. In this case, the supply flow rate (supply speed) to the cooling water tank 65 needs to be higher than the discharge flow rate (discharge speed) from the siphon.

In the above embodiment, as the water supply means for supplying the cooling water into the cooling water tank 65, the water supply pipe 59 for guiding the water to the cistern 58 and the water overflowing from the cistern 58 are cooled through the cooling tower 61. Water tank 65
Although the overflow water supply means 59a for guiding the cooling water is used, the cooling water may be directly supplied to the cooling water tank 65.

In the above embodiment, the double-effect absorption refrigeration cycle 3 is shown as an example of the absorption refrigeration cycle, but a single-effect absorption refrigeration cycle may be used.
A triple effect or more multi-effect absorption refrigeration cycle may be used.
In addition, when injecting the medium liquid into the low temperature regenerator, the low temperature regenerator 1
Although an example of injecting from above 6 is shown, it may be injected from below.

As a heating source of the heating means 2, the 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 solution of lithium bromide has been shown as an example of the absorbing liquid, other absorbing liquids such as ammonia as the refrigerant and ammonia aqueous solution using water as the absorbent may be used. As an example of the heat medium, tap water is used and shared with the cooling water in the cooling water circuit. However, other heat medium such as antifreeze or oil different from the cooling water in the cooling water circuit may be used.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an absorption air conditioner (first embodiment).

FIG. 2 is a schematic configuration diagram of a cooling water circuit (first embodiment).

FIG. 3 is a plan view of a cooling water tank (first embodiment).

FIG. 4 is a flowchart showing an operation of a blowdown operation by the control device (first embodiment).

FIG. 5 is a flowchart showing the operation of the cleaning operation by the control device (first embodiment).

FIG. 6 is an explanatory diagram of the cooling water concentration of the water supply tank (first
Example).

FIG. 7 is a schematic configuration diagram of a cooling water tank (second embodiment).

[Explanation of symbols]

 1 Absorption Type Air Conditioner 2 Heating Means 3 Absorption Type Refrigeration Cycle 5 Cooling Water Cooling Means 6 Controller 15 High Temperature Regenerator 16 Low Temperature Regenerator 17 Condenser 18 Evaporator 19 Absorber 48 Solution Pump 59 Water Supply Pipe (Water Supply Means) 59a Overflow Water supply means (water supply means) 61 Cooling tower 62 Cooling water circuit 65 Cooling water tank 66 First siphon passage 66a First water inlet 66b First drainage port 67 Second siphon passage 67a Second water inlet 67b Second drainage port 68 Opening / closing Valve 69 Overflow means 71 Low level sensor 72 High level sensor

Claims (7)

[Claims] 1. A) heating means for heating an absorbing liquid, b) a regenerator for vaporizing a part of the absorbing liquid by heating the absorbing liquid by the heating means, and cooling a vaporized refrigerant generated in the regenerator. A condenser for liquefying the liquefied refrigerant, an evaporator for evaporating the liquefied refrigerant liquefied by the condenser under a low pressure, an absorber for absorbing the vaporized refrigerant evaporated by the evaporator into an absorbing liquid, and the absorbing liquid in the absorber as described above. An absorption type refrigeration cycle equipped with a solution pump for pressure-feeding to a regenerator, and c) a cooling water circuit for absorbing absorption heat in the absorber and circulating cooling water for cooling the vaporized refrigerant in the condenser, and d) An evaporative cooling tower provided in the cooling water circuit for exposing the cooling water to the outside air to dissipate the heat; e) a cooling water tank provided in the cooling water circuit for storing the cooling water; and f) inside the cooling water tank. The specified amount of cooling water. G) a first water inlet opening in the cooling water tank, a first water outlet for guiding the cooling water to the outside of the cooling water tank, and the first water inlet and the first water outlet. And an inverted U-shaped first siphon passage that connects with the absorption type air conditioner. 2. The absorption type air conditioner according to claim 1, further comprising overflow means for discharging the cooling water rising above the top of the first siphon passage to the outside of the cooling water tank. Air conditioner. 3. The absorption type air conditioner according to claim 1 or 2, wherein a low level sensor for detecting a low level water level lower than the first water inlet in the cooling water tank, and a low level sensor in the cooling water tank. A high-level sensor that detects a high-level water level slightly lower than the top of the first siphon passage, and a signal that the low-level sensor detects the low-level water level are given, and the high-level sensor detects the high-level water level. And a control means for supplying cooling water from the water supply means into the cooling water tank until a predetermined amount of water is supplied from the absorption air conditioner. 4. The absorption type air conditioner according to claim 1 or 2, wherein a low level sensor for detecting a low level water level lower than the first water intake port in the cooling water tank, and the low level sensor An absorption type air conditioner comprising: a control unit that supplies cooling water from the water supply unit into the cooling water tank until a predetermined amount of water is supplied after the level water level is detected. 5. The absorption type air conditioner according to claim 1 or 2, wherein a low level sensor for detecting a low level water level lower than the first water intake port in the cooling water tank, and a low level sensor in the cooling water tank. A high-level sensor that detects a high-level water level slightly higher than the top of the first siphon passage, and a signal that the low-level sensor detects the low-level water level are given until the high-level sensor detects the high-level water level. An absorption type air conditioner, comprising: a control unit configured to supply cooling water from the water supply unit into the cooling water tank. 6. The absorption type air conditioner according to claim 1 or 2, comprising a counter for counting the operating time of the absorption type refrigeration cycle, and the water supply means is provided every time the count time by the counter reaches a set time. The absorption type air conditioner is characterized in that a predetermined amount of cooling water that can reach the top water level at which the siphon operates is supplied from the inside to the cooling water tank. 7. The absorption type air conditioner according to claim 1, further comprising an opening / closing valve for opening / closing the first siphon passage, and a lower part in the cooling water tank lower than the first water supply port. A second U-shaped second siphon passage that connects the second water intake port and the second drain port with a second water intake port that opens at a second drain port that guides cooling water to the outside of the cooling water tank And the first siphon passage and the second siphon passage,
An absorption type air conditioner comprising a common passage, wherein the opening / closing valve opens / closes the first water intake port.