JPH09126584A - Absorption type air conditioning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the generation of offensive odor in all possible regions and failure such as clogging of a cooling water circuit while restricting waste of a water source and of water supply charge in all possible regions and moreover, enable treatment for preventing repetition of failure when it occurs attributed to the supply quantity of the cooling water. SOLUTION: A cooling water tank 65 below a cooling column 61 is provided with a drain port 66 from which cooling water exceeding a specified amount of water flows outside. The time for opening a water supply valve 60 is set considering the time until the water level reaches a high level from the low level so that the cooling water is supplied up to the supply quantity set by a switching means 76 when the water level in the cooling water tank 65 is down to a low level. As a result, the cooling water tank 65 is replenished with the cooling water while excessive cooling water is applied to the cooling water tank 65 to dilute the cooling water. Thus, the amount of water supplied can be set by the switching means 76 thereby assuring a proper amount of water supplied in all possible regions.

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 the evaporative cooling tower, the cooling water in the cooling water tank provided in the cooling water circuit is discharged, and the cooling water is supplied to the cooling water tank by the water supply means (for example, , Blow-down operation of cooling water that supplies tap water) is regularly performed.

If the amount of cooling water supplied by the blowdown operation is unnecessarily large, such as when the interval of the blowdown operation is short, water resources are wasted and water bills and the like are wasted. On the contrary, if the amount of cooling water supplied by the blowdown operation is unnecessarily small, such as when the interval of the blowdown operation is long, the above-mentioned problems (occurrence of a strange odor,
Clogging of the cooling water circuit etc. occurs. Therefore, the amount of cooling water supplied by the blowdown operation is required to be set to an appropriate value.

However, since the quality of water supplied to the cooling water tank during the blowdown operation differs depending on the area where the absorption type air conditioner is installed, the cooling water is supplied by the blowdown operation so that problems do not occur in a wide area. There is a tendency to set a large amount. For this reason, depending on the area where it is used, the replacement of cooling water will be unnecessarily large.
As described above, water resources are wasted, and water bills are wasted.

In addition, even if a large amount of cooling water is set by the blowdown operation so that a problem does not occur in a wide area to some extent, it is supplied in an area where a large amount of dust or soot is present in the air, or is supplied. In an area where the amount of mineral components contained in the cooling water and supplied is very large, the above-mentioned problems occur, and even if maintenance is performed, the above-mentioned problems repeatedly occur.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. An object of the present invention is to reduce waste of water resources and waste of water bills in all areas, and to generate offensive odors and cooling water circuits in all areas. (EN) An absorption type air conditioner capable of eliminating a problem such as clogging of an air conditioner and dealing with the problem even if a problem occurs due to a supply amount of cooling water.

[0009]

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 type air conditioner comprises: a) heating means for heating the absorbing liquid; and b) a regenerator for heating a portion of the absorbing liquid by the heating means, a regenerator for regenerating 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 evaporation type cooling tower provided in this cooling water circuit for exposing the cooling water to radiate heat, and e) being provided in the cooling water circuit for storing the cooling water and internally The stored cooling water A cooling water tank provided with a discharging means for discharging; f) a water supply means for supplying cooling water into the cooling water tank; and g) discharging the cooling water in the cooling water tank from the discharging means, and A cooling water blowdown operation means for supplying the cooling water into the cooling water tank by the water supply means, and h) a changing means for changing the amount of the cooling water supplied by the blowdown operation means.

[Means for Claim 2] In the absorption type air conditioner according to Claim 1, the discharge means is a discharge port provided in the cooling water tank, and the changing means sets a plurality of water supply amounts. Switch means for, the blowdown operation means, a low level sensor for detecting a low level water level set lower than the discharge port in the cooling water tank, and the low level sensor has detected a low level water level A control device that controls the water supply means when a signal is given and supplies the water supply amount set by the switch means to the cooling water tank.

[Means for Claim 3] In the absorption type air conditioner according to Claim 1, the blowdown operation means is provided with a counter for counting the operation time, and the blowdown operation means is provided with the counter every time the count time by the counter reaches a set time. While discharging the cooling water in the tank from the discharging means, a cooling water blowdown operation for supplying the cooling water into the cooling water tank by the water supply means is performed, and the changing means changes the set time. It is characterized by performing.

[Means of claim 4] In the absorption type air conditioner of claim 1, the blowdown operation means is provided with a counter for counting the operation time, and the blowdown operation means is provided with the counter every time the count time by the counter reaches a set time. While discharging the cooling water in the tank from the discharging means, the cooling water blowdown operation for supplying the cooling water into the cooling water tank by the water supply means is performed, and the changing means is arranged in the cooling water tank. It is characterized in that the amount of cooling water supplied is changed.

[0013]

[Operation and effect of the invention]

[Operation and effect of claim 1] When installing the absorption type air conditioner, the amount of cooling water supplied by the blowdown operation means
The changing means sets the value so that it will be a value according to the quality of water used in the area where it is installed and the dirty state of the air. That is, when the cooling water supplied to the cooling water tank by the water supply means contains a large amount of mineral components or the like, or when the air at the site where the cooling tower is installed is dirty, the blowdown operation means is changed by the changing means. If the cooling water supply amount is set to a large amount and conversely the amount of minerals contained in the cooling water supplied to the cooling water tank by the water supply means is small, or the air where the cooling tower is installed is clean, The changing means sets the amount of cooling water supplied by the blowdown operation means to a small amount.

As a result, it is possible to prevent the concentration of the cooling water in the cooling water circuit from increasing, irrespective of the water quality or air quality in which the absorption air conditioner is installed, and as a result, an offensive odor from the cooling tower is generated. Problems such as generation and clogging of the cooling water circuit can be eliminated, and since only an appropriate amount of cooling water is used, waste of water resources and waste of water bill can be suppressed.

Further, even if a problem such as an excessively large amount or an excessively small amount of cooling water is generated, the problem caused by changing the amount of cooling water supplied by the blow-down operation means by the changing means You can deal with it not to repeat.

[Operation and Effect of Claim 2] 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, the low level sensor gives a signal indicating that the water level has dropped to the low level (blowdown operation instruction signal).
Is output to the control device. Then, the control device opens the water supply valve, the amount of cooling water set by the switch means, which is the changing means, is supplied to the cooling water tank, and the cooling water above the predetermined water level is drained from the discharge port.

When the amount of cooling water evaporated by the cooling tower is large, the concentration of the cooling water increases rapidly, and conversely, when the amount of cooling water evaporated is small, the concentration of the cooling water increases moderately. Therefore, in the absorption type air conditioner according to claim 2, when the amount of evaporation of the cooling water is large, the frequency of lowering to the low level water level becomes high and the blowdown operation is frequently performed to suppress the increase in the concentration of the cooling water. When the evaporation amount of the cooling water is small, the blowdown operation is performed less, and as a result, the blowdown operation is automatically performed according to the increase in the concentration of the cooling water.

Further, in the absorption type air conditioner of claim 2,
By opening the water supply valve, the cooling water in the cooling water tank overflows from the outlet and is discharged. Therefore, the concentration increase of the cooling water can be prevented without using the drain valve. As a result, the failure probability of the means for preventing the concentration increase of the cooling water can be suppressed to a low level, and the reliability of the absorption air conditioner can be improved.

[Operation and effect of claim 3] The blowdown operation means opens and closes the water supply valve each time the operation time reaches the set time set by the changing means, regardless of the water level in the cooling water tank. The cooling water in excess of the amount of cooling water reduced by evaporation is supplied into the cooling water tank to reduce the concentration of the cooling water in the cooling water tank. As a result, since the blowdown operation is performed without using the water level sensor, the cost of the absorption air conditioner can be kept low.

[Operation and Effect of Claim 4] The blowdown operation means controls the water supply valve every time the operation time reaches the set time regardless of the water level in the cooling water tank,
The cooling water of the supply amount set by the changing means is supplied into the cooling water tank, and the concentration of the cooling water in the cooling water tank is reduced by the excessive supply of cooling water (this amount is changed to the changing means). Let As a result, since the blowdown operation is performed without using the water level sensor, the cost of the absorption air conditioner can be kept low.

[0021]

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 4 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 the present embodiment is a gas combustor for combusting a gas which is a fuel to generate heat, and heating 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 is provided with 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 the heat insulation 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 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, 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.

(Explanation of Evaporator 18) The evaporator 18 is provided below the condensing container 32 together with the absorber 19, and is constituted by an annular container-shaped evaporative absorbing container 41 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 evaporative 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 evaporative heat exchanger 42 is very likely 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.

(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. .

Further, 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 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 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 having passed through the evaporator 18 to the indoor heat exchanger 54, and again for guiding 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 to cool the cooling water whose temperature 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.

As shown in FIG. 2, the cooling water tank 65 is provided with a discharge port 66 for accumulating a predetermined amount (for example, 14 liters) inside and for discharging the cooling water having a water level higher than that to the outside by draining it. A guide container 67 is provided around the discharge port 66 to prevent the cooling water supplied to the cooling water tank 65 from being directly discharged from the discharge port 66 without being used for dilution. Has been.

The guide container 67 divides the inside of the cooling water tank 65 into two parts, and water is supplied to the side where the discharge port 66 does not exist, so that the newly supplied water is difficult to be drained immediately, and dust that enters is mixed. The cooling water having a high concentration is easily discharged from the discharge port 66 by the soot and soot. The cooling water discharged from the discharge port 66 is discharged downward through the drain pipe 68 connected to the discharge port 66.

The cooling water tank 65 has a discharge port 66.
A low level sensor 71 for detecting a low level water level set lower than that (for example, a water level of 12 liters which is 2 liters less than the water level defined by the outlet 66).
And a high level sensor 72 for detecting a high level water level set lower than the discharge port 66 and higher than the low level water level (for example, a water level of 13 liters, which is one liter higher than the low level water level). It is provided.

When the low level sensor 71 issues an OFF signal to detect the low level water level, the control unit operates the blowdown operation in response to the detection signal.
In the blowdown operation (details will be described later) by this control device, when the low level sensor 71 detects the low level water level, the water supply valve 60 is opened. The water supply valve 60 is opened, and the water overflowing from the cistern 58 is guided into the cooling water tank 65 via the overflow water supply means 59a.
Cooling water is supplied to the cooling water tank 65. Even after the replenishment up to a predetermined water level (14 liters of water) which is the height of the discharge port 66 is completed, the cooling water is excessively supplied into the cooling water tank 65 to overflow from the discharge port 66, as described later. The water is drained, and then the water supply valve 60 is closed by the blowdown control means. That is, even after the replenishment of the cooling water in the cooling water tank 65 is completed, the cooling water is excessively supplied to the cooling water tank 65, the cooling water in the cooling water circuit 62 is diluted, and the amount of the excessively supplied water is reduced. Is the outlet 6
6 is discharged to the outside. The amount of cooling water supplied to the cooling water tank 65 via the water supply valve 60 is controlled by the blow-down operation means described later so that it becomes the amount of water supply set by the switch means 76 described later.

(Description of Control Device 6) The control device 6 includes the above-mentioned refrigerant valve 39, solution pump 48 (cooling / heating 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.

Further, the control device 6 is connected with a switch means 76 for setting a plurality of water supply amounts. The switch means 76 of this embodiment has four kinds of water supply amounts (for example, 3.5 liter, 4 liter, 4.5 liter, and 5 liter).
This is a 2-bit changeover switch for setting the liter). Then, as will be described later, the control device 6 sets the valve opening time of the water supply valve 60 according to the setting state of the switch means 76, and supplies the cooling water amount set by the switch means 76.

(Explanation of Blow-Down Control Means) As described above, the control device 6 detects when the low level sensor 71 provided in the cooling water tank 65 detects the low level water level.
Provided is a blowdown control means for opening the water supply valve 60 to replenish the cooling water in the cooling water tank 65, and at the same time to supply a preset amount of the cooling water to the cooling water tank 65 to dilute the cooling water. Has been.

An example of control of the water supply valve 60 by this blowdown control means will be described with reference to the flowchart of FIG. When the control device 6 starts operation, first, it is judged whether or not the low level sensor 71 detects the low level water level (step S1). If this determination is NO, the process returns to step S1. If the determination result is YES, the water supply valve 60 is opened and the supply of the cooling water to the cooling water tank 65 is started (step S2).

Next, it is judged whether or not the high level sensor 72 detects the high level water level (step S3).
If the determination is NO, the process returns to step S3. If the determination result is YES, the valve opening time for opening the water supply valve 60 is determined from the count time from the detection of the low level water level to the detection of the high level water level (step S4).

Specifically, 1 liter of cooling water is supplied to the cooling water tank 65 from the detection of the low level water level to the detection of the high level water level, and the switch means 76 is 3.5 liters. When the water supply amount is set to, the opening time of the water supply valve 60 is determined by (count time from detection of the low level water level to detection of the high level water level) × 3.5, and the switch means If 76 is set to a water supply of 4 liters, the water supply valve 6
When the valve opening time of 0 is determined by (count time from detection of low level water level to detection of high level water level) × 4, and switch means 76 is set to a water supply amount of 4.5 liters. Is the opening time of the water supply valve 60,
(Count time from detection of low level water level to detection of high level water level) × 4.5, and when the switch means 76 is set to a water supply amount of 5 liters, the water supply valve 60 is opened. The valve time is determined by (count time from detection of low level water level to detection of high level water level) × 5.

Next, it is judged whether or not the valve opening time determined in step S4 has elapsed since the low level water level was detected (step S5). If the result of this determination is NO, the process returns to step S5. If the determination result is YES, it is determined that 4 liters of cooling water has been supplied to the cooling water tank 65, the water supply valve 60 is closed (step S6), and then the process returns.

[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 evaporation 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 predetermined water level (the water level reaching the discharge port 66) is gradually reduced 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, the control device 6 opens the water supply valve 60 to set the cooling water set by the switch means 76 to the cooling water level. Supply to the tank 65. Of the supplied cooling water, the first 2 liters are used to replenish the cooling water tank 65 and then to dilute the cooling water thereafter. That is, by supplying the excessive cooling water to the cooling water tank 65, the cooling water is diluted, and the excessively supplied cooling water is discharged to the outside from the discharge port 66.

Next, the equilibrium concentration of cooling water will be described. First, as shown in FIG. 4A, the water level reaches a predetermined water level, the amount of cooling water in the cooling water tank 65 is H, and the concentration ratio at this time is x. Here, as shown in (b) of FIG. 4, when B amount of cooling water is added and the cooling water is diluted, the concentration ratio of the cooling water is expressed by the following equation. It should be noted that when the amount of cooling water B (the amount of water that can be changed by operating the switch means 76) is added, the excess cooling water is discharged from the discharge port 66, and the water level is set to a predetermined level as shown in FIG. Returning to the water level, the amount of cooling water in the cooling water tank 65 is kept at H.

(Equation 1)

When the cooling water evaporates in the cooling tower 61 and the amount of the cooling water evaporates as shown in FIG. 4 (d) (when the water level in the cooling water tank 65 reaches the low level water level). The concentration ratio of the cooling water of is expressed by the following equation.

(Equation 2)

Then, as shown in FIG. 4E, 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. 4, and the concentration ratio x (ave) in the equilibrium state is represented 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, the amount H of the cooling water in the cooling water tank 65 that reaches a predetermined water level is 14 liters, the amount E of water replenished by evaporation is 2 liters, and the amount B of water supplied for dilution is 2 liters, for example. Then, the equilibrium state at this time is calculated as
It becomes 4. On the other hand, for the maximum concentration ratio, the above numerical values (water amount H = 14 liters, water amount E = 2 liters, water amount B = 2 liters) are used in Equation 3 in the state of (d) of FIG. The maximum concentration ratio is 2.33 when calculated by substituting.

[Effects of the Embodiment] The absorption type air conditioner 1 determines the supply amount of the cooling water to be replaced by the blowdown operation at the time of first installation, the water quality and the air used in the area where the installation is performed. The value is set by operating the switch means 76 by the installer so as to have a value corresponding to the dirt state of the. That is, when the cooling water supplied from the water supply pipe 59 contains a large amount of mineral components or the like, or when the air at the portion where the cooling tower 61 is installed is dirty, the switch means 76 supplies a large amount of cooling water. When the amount of cooling water that is set and supplied excessively increases, conversely, when the cooling water supplied from the water supply pipe 59 contains a small amount of mineral components, or when the air where the cooling tower 61 is installed is clean. The amount of cooling water supplied is set small by the switch means 76, and the amount of cooling water supplied excessively becomes small.

As a result, it is possible to prevent the concentration of the cooling water in the cooling water circuit 62 from becoming higher than the predetermined concentration regardless of the water quality or the air quality in which the absorption air conditioner 1 is installed.
As a result, it is possible to eliminate problems such as generation of an offensive odor from the cooling tower 61 and clogging of the cooling water circuit, and since only an appropriate amount of cooling water is used, waste of water resources and water bills are avoided. Waste can be suppressed.

Further, even if a problem such as an excessively large amount or an excessively small amount of supplied cooling water occurs, the change means changes the supplied amount of cooling water by the blow-down operation means, and the excessively supplied cooling water is supplied. By changing the amount of water, it is possible to take measures so as not to repeat the trouble that has occurred.

On the other hand, the absorption type air conditioner 1 of the present embodiment uses the discharge port 66 for discharging the cooling water above the predetermined water level, and supplies the cooling water tank 65 with a larger amount of cooling water than the amount of cooling water reduced by evaporation. By supplying the cooling water circuit 62
Dilute the cooling water inside. 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, the control device 6 opens the water supply valve 60 to perform the blow down operation. Therefore, when the evaporation amount in the cooling tower 61 is large, the blow down operation is performed. Is often done,
On the contrary, when the evaporation amount is small, the blowdown operation is also performed less, and as a result, insufficient dilution can be prevented, excessive blowdown operation can be suppressed, and the waste of the supply of cooling water can be eliminated.

Further, depending on the time from when the low level sensor 71 detects the low level water level until when the high level sensor 72 detects the high level water level, the water supply valve 60
Since the valve opening time is determined, the actual water supply amount of the cooling water can be made equal to the water supply amount set by the switch means 76 irrespective of the supply rate that varies depending on the supply water pressure of the cooling water.

In this embodiment, the amount of water supplied during the blowdown operation is set according to the water supply time. However, a water amount sensor is provided in the water supply pipe 59 to supply water to the cooling water tank 65. The water supply amount itself may be measured and set. In this case, the high level sensor 72 is unnecessary.

[Second Embodiment] In the above embodiment, when the low level sensor 71 detects the low level water level, the control device 6 opens the water supply valve 60 to perform the blowdown operation to supply the cooling water. Switch means 76 as a change in quantity
In the above, an example in which a plurality of sets of cooling water that can be set is supplied has been described, but in the present embodiment, a cooling operation time is counted by a counter (not shown) in the control device 6, and the count time by this counter is counted. , A plurality of set times (for example, 20 minutes, 30
Min., 40 min., 50 min.), The control device 6 keeps the water supply valve 60 for a certain period of time every time the set time is selected.
Alternatively, the blowdown operation is performed by opening the valve until a fixed amount of water is supplied.

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

In this embodiment, the amount of water supply is changed in a plurality of stages by changing the interval of blowdown operation. However, the interval of blowdown operation is fixed and the opening time of the water supply valve 60 is changed. Of the water supply amount by changing the water supply amount by changing the water supply amount to a plurality of stages, or by providing a water amount sensor in the water supply pipe 59 and changing the passing water supply amount itself supplied into the cooling water tank 65 to a plurality of stages. You may make changes.

[Modification] 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 cistern 58.
Although the overflow water supply means 59a for guiding the water overflowing from the cooling water tank 65 to the cooling water tank 65 via the cooling tower 61 is used, the cooling water may be directly supplied to the cooling water tank 65.

In the above embodiment, in order to drain the cooling water from the cooling water tank 65, the cooling water tank 65 is excessively supplied to the cooling water tank 65, and the excessive amount is overflow-discharged from the discharge port 66. However, a drain valve may be provided in the cooling water tank 65, and the drain valve may be opened and closed to discharge the cooling water in 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.

A gas burner 11 is used as a heating source of the heating means 2.
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 is 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 type air conditioner.

FIG. 2 is a schematic configuration diagram of a cooling water tank.

FIG. 3 is a flowchart showing the operation of blowdown control means by the control device.

FIG. 4 is an explanatory diagram for replenishing cooling water to a cooling water tank.

[Explanation of symbols]

 1 Absorption type air conditioner 2 Heating means 3 Absorption type refrigeration cycle 5 Cooling water cooling means 6 Control device (blowdown operation means) 15 High temperature regenerator 16 Low temperature regenerator 17 Condenser 18 Evaporator 19 Absorber 48 Solution pump 59 Water pipe (Water supply means) 59a Overflow water supply means (water supply means) 61 Cooling tower 62 Cooling water circuit 65 Cooling water tank 66 Discharge port (discharge means) 71 Low level sensor (blow down operation means) 72 High level sensor (blow down operation means) ) 76 switch means (change means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toru Fukuchi 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Gas Co., Ltd. (72) Yasunari Furukawa 4-1-2, Hirano-cho, Chuo-ku, Osaka Within Osaka Gas Co., Ltd.

Claims (4)

[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; 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; and e) storing cooling water in the cooling water circuit and discharging the cooling water stored inside. Cold with drainage means An inflow water tank, f) a water supply means for supplying cooling water into the cooling water tank, and g) discharging the cooling water in the cooling water tank from the discharging means, and the cooling water tank by the water supply means. An absorption air conditioner comprising: a cooling water blowdown operation means for supplying cooling water therein; and h) a changing means for changing the amount of cooling water supplied by the blowdown operation means. 2. The absorption type air conditioner according to claim 1, wherein the discharge means is a discharge port provided in the cooling water tank, and the changing means is a switch means for setting a plurality of water supply amounts. When the blowdown operation means is provided with a low level sensor that detects a low level water level set lower than the discharge port in the cooling water tank, and a signal that the low level sensor detects the low level water level is given. An absorption type air conditioner comprising: a control device that controls the water supply means and supplies the water supply amount set by the switch means to the cooling water tank. 3. The absorption type air conditioner according to claim 1, wherein the blowdown operation means is provided with a counter for counting an operation time, and each time the count time by the counter reaches a set time, the discharge means moves the tank. The cooling water is discharged, and the cooling water is blown down to supply the cooling water into the cooling water tank by the water supply means, and the changing means changes the set time. Absorption type air conditioner. 4. The absorption type air conditioner according to claim 1, wherein the blowdown operation means is provided with a counter for counting an operation time, and each time the count time by the counter reaches a set time, the discharge means causes the tank to be discharged. The cooling water is discharged, and a cooling water blowdown operation is performed by supplying the cooling water into the cooling water tank by the water supply means, and the changing means is the cooling water supplied into the cooling water tank. An absorption type air conditioner characterized by changing the supply amount of.