JPH0875301A - Absorption type refrigeration cycle apparatus - Google Patents

Abstract

PURPOSE: To obtain an absorption type refrigeration cycle apparatus which is excellent in maintainability and capable of coping with cooling water shortage caused by a failure of a water supply device, suspension of water supply, leakage of cooling water, etc., by quickly detecting the cooling water shortage. CONSTITUTION: When an Lo level switch 811 becomes off during cooling operation, a controller 9 opens a water supply valve 342 mounted on a water supply pipe 341 through which cooling water 340 (city water) is supplied to a cooling water reservoir 81, and continues cooling operation. In the case a Hi level switch 812 does not become on even after a specified time period (18 minutes, for example) passes, a gas burner 11 is turned off and an absorbent solution pump 6 and a motor-driven cooling water pump 82 are kept operated to carry out dilution operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption type refrigeration cycle device using an absorption liquid.

[0002]

2. Description of the Related Art As a measure against CFCs, a regenerator for evaporating the absorbing liquid and a condensing heat exchanger for passing cooling water are provided, which has a heating chamber in which the absorbing liquid is put in and heated by a heating source. A condenser that cools the liquefied refrigerant generated in the regenerator to liquefy it, an evaporator that evaporates the liquefied refrigerant evaporated in this condenser under reduced pressure, and an absorption heat exchanger through which cooling water passes are arranged for evaporation. The absorber that absorbs the vaporized refrigerant evaporated in the absorber into the absorbing liquid, the absorbing liquid pump that transfers the absorbing liquid from the absorber to the heating chamber, and the cooling water that has passed through the absorbing heat exchanger and the condensing heat exchanger From the cooling tower for cooling the cooling water, a cooling water reservoir provided under the cooling tower for storing the cooling water, a water supply means for replenishing the cooling water with the cooling water, and a predetermined water level of the cooling water in the cooling water reservoir. Water level detection means to detect the A cooling water pump to be transferred to the heat exchanger for heating, an operation controller for controlling the heating source, the absorbing liquid pump, the water supply means, and the cooling water pump, and the operation controller when the water level detecting means detects less than the predetermined water level. The inventors made a prototype of an absorption type refrigeration cycle device that operates a water supply means.

In this absorption refrigeration cycle apparatus, when the refrigerant evaporates in the evaporator, heat is taken from the heat medium (water or the like) exchanged with the refrigerant in the evaporator to cool the heat medium. Then, by exchanging heat between the cooled heat medium and the room air or the air in the heat insulation box, it is possible to perform indoor cooling or refrigeration in the box.

[0004]

SUMMARY OF THE INVENTION The absorption refrigeration cycle apparatus described above is designed so that when an abnormal temperature rise in the regenerator is detected, the operation is stopped because an abnormality has occurred.

However, the amount of cooling water may decrease due to failure of the water supply means, water interruption, leakage of cooling water, etc. In this case, it takes a long time for the regenerator to abnormally heat up, and the abnormal temperature rises. The inventors have found that there is a point to be improved that the discovery of the occurrence is delayed.

[0006] The purpose of the present invention is to prevent the failure of the water supply means, water interruption,
Alternatively, it is an object of the present invention to provide an absorption refrigeration cycle device having excellent maintainability, which can promptly detect and cope with a shortage of cooling water due to leakage of cooling water.

[0007]

In order to solve the above problems, the present invention employs the following configurations. (1) A regenerator that has a heating chamber in which an absorbing liquid is placed and heated by a heating source, vaporizes the absorbing liquid and separates it into a concentrated absorbing liquid and a refrigerant, and a heat exchanger for condensation through which cooling water passes. A condenser for cooling and liquefying the vaporized refrigerant generated in the regenerator, an evaporator for evaporating the liquefied refrigerant liquefied by the condenser under reduced pressure, and an absorption heat exchanger through which cooling water passes. Where the vaporized refrigerant evaporated in the evaporator is absorbed by the concentrated absorption liquid separated by the regenerator, and an absorption liquid pump that transfers the absorption liquid from the absorber to the heating chamber, Cooling water that has passed through the absorption heat exchanger and the condensation heat exchanger flows downward from above, and a cooling tower that cools the cooling water, and a cooling water reservoir that is provided below the cooling tower and stores the cooling water And the water level that detects the specified water level of the cooling water in the cooling water reservoir Outlet means, water supply means for replenishing the cooling water to the cooling water reservoir, cooling water pump for transferring the cooling water in the cooling water reservoir to the absorption heat exchanger, the heating source, the absorption liquid pump, the water supply means , And an operation controller for controlling the cooling water pump, and during the cooling operation, the operation controller continues the cooling operation by operating the water supply means when the water level detection means detects a water level lower than a predetermined water level. When the water level detecting means does not detect a water level higher than a predetermined water level even after a predetermined time has elapsed, the dilution operation is performed in which the operation of the heating source is stopped and the operation of the absorption liquid pump and the cooling water pump is continued. Do.

(2) A regenerator having a heating chamber in which the absorbing liquid is placed and heated by a heating source, and a regenerator for vaporizing the absorbing liquid to separate it into a concentrated absorbing liquid and a refrigerant, and a condenser for passing cooling water. A condenser having a heat exchanger disposed therein, which cools and liquefies the vaporized refrigerant generated in the regenerator, an evaporator which evaporates the liquefied refrigerant liquefied by the condenser under reduced pressure, and an absorber through which cooling water passes. An absorber that arranges a heat exchanger and absorbs the vaporized refrigerant evaporated in the evaporator into the concentrated absorption liquid separated by the regenerator, and an absorption liquid that transfers the absorption liquid from the absorber to the heating chamber. A pump and cooling water that has passed through the absorption heat exchanger and the condensation heat exchanger are caused to flow downward from above,
A cooling tower for cooling the cooling water, a cooling water reservoir provided under the cooling tower for storing the cooling water, cooling water in the cooling water reservoir, a water level detecting means for detecting a low water level and a high water level,
Water supply means for supplying cooling water to the cooling water reservoir, cooling water pump for transferring the cooling water in the cooling water reservoir to the absorption heat exchanger, the heating source, the absorption liquid pump, the water supply means, and the cooling An operation controller for controlling a water pump is provided, and when the water level detection means detects a high water level of the cooling water, it is possible to start the cooling operation by the operation controller, and during the cooling operation, the operation controller is When the water level detecting means detects less than a low water level, the water supplying means is operated to continue the cooling operation, and if the water level detecting means does not detect a water level equal to or lower than the low water level even after a lapse of a predetermined time, The operation of the heating source is stopped, and the dilution operation of continuing the operation of the absorption liquid pump and the cooling water pump is performed.

(3) A regenerator which has a heating chamber in which the absorption liquid is put and is heated by a heating source, which vaporizes the absorption liquid to separate it into a concentrated absorption liquid and a refrigerant, and a condenser through which cooling water passes. A condenser having a heat exchanger disposed therein, which cools and liquefies the vaporized refrigerant generated in the regenerator, an evaporator which evaporates the liquefied refrigerant liquefied by the condenser under reduced pressure, and an absorber through which cooling water passes. An absorber that arranges a heat exchanger and absorbs the vaporized refrigerant evaporated in the evaporator into the concentrated absorption liquid separated by the regenerator, and an absorption liquid that transfers the absorption liquid from the absorber to the heating chamber. A pump and cooling water that has passed through the absorption heat exchanger and the condensation heat exchanger are caused to flow downward from above,
A cooling tower for cooling the cooling water, a cooling water reservoir provided under the cooling tower for storing the cooling water, cooling water in the cooling water reservoir, a water level detecting means for detecting a low water level and a high water level,
Water supply means for supplying cooling water to the cooling water reservoir, cooling water pump for transferring the cooling water in the cooling water reservoir to the absorption heat exchanger, the heating source, the absorption liquid pump, the water supply means, and the cooling An operation controller for controlling a water pump is provided, and when the water level detection means detects a high water level of the cooling water, it is possible to start the cooling operation by the operation controller, and during the cooling operation, the operation controller is When the water level detection means detects a water level lower than the low water level, the water supply means is operated to continue the cooling operation, and if the water level detection means does not detect a water level higher than the high water level even after a predetermined time elapses, The operation of the heating source is stopped, and the dilution operation of continuing the operation of the absorption liquid pump and the cooling water pump is performed.

[0010]

[Action]

[Claim 1] The heating chamber of the regenerator is heated by the heating source, and the refrigerant in the absorbing liquid is vaporized and separated into the concentrated absorbing liquid and the refrigerant. By the heat exchanger for condensation through which the cooling water passes,
The condenser cools and liquefies the vaporized refrigerant generated in the regenerator.

The evaporator evaporates the liquefied refrigerant liquefied by the condenser under reduced pressure. The absorption heat exchanger through which the cooling water passes causes the absorber to absorb the vaporized refrigerant evaporated in the evaporator into the concentrated absorption liquid separated by the regenerator. The absorption liquid pump transfers the absorption liquid from the absorber to the heating chamber.

In the cooling tower, the cooling water that has passed through the absorption heat exchanger and the condensation heat exchanger flows from the upper side to the lower side, and the cooling water accumulates in the cooling water reservoir. While flowing, the cooling water exchanges heat with the outside air to radiate heat, and part of the cooling water evaporates, so that the cooling water cools down.

When the refrigerant evaporates in the evaporator, heat is taken from the heat medium exchanged with the refrigerant in the evaporator to cool the heat medium. Then, the cooled heat medium is heat-exchanged with the room air or the air in the heat insulation box, thereby performing indoor cooling or cold storage in the room.

(Normal operation) When the cooling water decreases due to evaporation or the like and the water level detecting means detects a water level lower than the predetermined water level, the operation controller operates the water supplying means to supply the cooling water to the cooling water reservoir. Cooling water is supplied to the cooling water reservoir, the water level becomes equal to or higher than the predetermined water level within a predetermined time, and the cooling operation is continued.

(Operation in case of abnormality) Failure of water supply means, water interruption,
The cooling water decreases due to leakage of the cooling water and the water level detecting means detects a water level lower than the predetermined water level, and the operation controller operates the water supplying means to try to replenish the cooling water to the cooling water reservoir.

If the cooling water is not replenished to the cooling water reservoir or if there is a leak, the water level does not exceed the predetermined water level even after the elapse of a predetermined time. Therefore, the operation controller performs the dilution operation in which the operation of the heating source is stopped and the operations of the absorption liquid pump and the cooling water pump are continued.

[Claim 2] (Normal operation) When the water level detection means detects a high water level of the cooling water, the operation controller can start the cooling operation, and the cooling operation is started by the operation start instruction. When the cooling water decreases due to evaporation or the like and the water level detecting means detects a water level lower than the low water level, the operation controller operates the water supplying means to supply the cooling water to the cooling water reservoir. Cooling water is replenished to the cooling water reservoir, the water level becomes a low water level or higher within a predetermined time, and the cooling operation is continued.

(Operation when abnormality occurs from the beginning) Operation control is performed when the cooling water does not accumulate in the cooling water reservoir and the water level detecting means does not detect a high water level due to failure of the water supply means, water interruption, perforation of the cooling water reservoir, etc. The cooling operation cannot be started by the air conditioner, and the cooling operation is not started even if the operation start instruction is given.

(Operation in case of abnormality in the middle) Cooling water decreases due to failure of water supply means, water interruption, leakage of cooling water, etc., and the water level detection means detects less than low water level, and the operation controller Attempting to activate the means to replenish the cooling water to the cooling water reservoir.

If the cooling water is not replenished to the cooling water reservoir or if there is a leak, the water level does not become lower than the low water level even after a lapse of a predetermined time. Therefore, the operation controller performs the dilution operation in which the operation of the heating source is stopped and the operations of the absorption liquid pump and the cooling water pump are continued.

[Claim 3] (Operation during normal operation) When the water level detecting means detects a high water level of the cooling water, the operation controller can start the cooling operation, and the cooling operation is started by the operation start instruction. When the cooling water decreases due to evaporation or the like and the water level detecting means detects a water level lower than the low water level, the operation controller operates the water supplying means to supply the cooling water to the cooling water reservoir. Cooling water is replenished to the cooling water reservoir, the water level becomes higher than the high water level within a predetermined time, and the cooling operation is continued.

(Operation when abnormality occurs from the beginning) When the water supply means fails, the water is cut off, the cooling water reservoir is pierced, etc., the cooling water is not accumulated in the cooling water reservoir and the water level detecting means does not detect the high water level. The cooling operation cannot be started by the air conditioner, and the cooling operation is not started even if the operation start instruction is given.

(Operation when abnormality occurs midway) Due to failure of water supply means, water cutoff, leakage of cooling water, etc., cooling water decreases, water level detection means detects less than low water level, and operation controller Attempting to activate the means to replenish the cooling water to the cooling water reservoir.

If the cooling water is not replenished in the cooling water reservoir or if there is a leak, the water level does not become higher than the high water level even after a lapse of a predetermined time. Therefore, the operation controller performs the dilution operation in which the operation of the heating source is stopped and the operations of the absorption liquid pump and the cooling water pump are continued.

[0025]

【The invention's effect】

[Claim 1] During the cooling operation, when the water level detecting means detects a water level lower than the low water level, the operation controller activates the water supply means to continue the cooling operation, and the water level detecting means keeps the predetermined level even after a predetermined time has elapsed. If the water level or higher is not detected (problem of water supply means, water cutoff, leakage of cooling water, etc.), stop the heating source and perform a dilution operation to continue the operation of the absorbent pump and cooling water pump. It is a configuration to be performed. Therefore, it is possible to quickly detect a cooling water shortage due to a failure of the water supply means, water cutoff, or leakage of cooling water, perform a dilution operation, and maintain the device.

[Claim 2] When the water level detecting means detects a high water level of the cooling water, the operation controller can start the cooling operation. Therefore, before the cooling operation is started, a shortage of cooling water due to a failure of the water supply means, water interruption, perforation of the cooling water reservoir, etc. is detected, and when the cooling water is insufficient, the cooling operation cannot be started, so that the maintenance is excellent.

During the cooling operation, when the water level detecting means detects a water level lower than the low water level, the operation controller activates the water supply means to continue the cooling operation, and the water level detecting means keeps the water level above the low water level for a predetermined time. If not detected (possibly due to failure of water supply means, water cutoff, leakage of cooling water, etc.), stop heating source operation and perform dilution operation to continue operation of absorbent pump and cooling water pump. is there. Therefore, it is possible to quickly detect a cooling water shortage due to a failure of the water supply means, water cutoff, or leakage of cooling water, perform a dilution operation, and maintain the device.

[Claim 3] When the water level detecting means detects a high water level of the cooling water, the operation controller can start the cooling operation. Therefore, before the cooling operation is started, a shortage of cooling water due to a failure of the water supply means, water interruption, perforation of the cooling water reservoir, etc. is detected, and when the cooling water is insufficient, the cooling operation cannot be started, so that the maintenance is excellent.

During the cooling operation, when the water level detecting means detects a water level lower than the low water level, the operation controller activates the water supply means to continue the cooling operation, and the water level detecting means keeps the water level above the high water level for a predetermined time. If not detected (possibly due to failure of water supply means, water cutoff, leakage of cooling water, etc.), stop heating source operation and perform dilution operation to continue operation of absorbent pump and cooling water pump. is there. Therefore, it is possible to quickly detect a cooling water shortage due to a failure of the water supply means, water cutoff, or leakage of cooling water, perform a dilution operation, and maintain the device.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention (corresponding to claims 1 and 2) will be described with reference to FIGS. 1 and 2, and a second embodiment of the present invention (corresponding to claims 1 and 3). (Correspondence) will be described with reference to FIGS. The absorption type cooling and heating devices A and B have a heating chamber 12 in which a low-concentration absorption liquid (lithium bromide aqueous solution in this embodiment) is placed and heated by a gas burner 11, and the refrigerant (water) in the low-concentration absorption liquid is removed. A high-temperature regenerator 1 that evaporates and separates into a medium-concentration absorption liquid and a refrigerant, and the medium-concentration absorption liquid is heated by utilizing the condensation heat of the vaporized refrigerant in the high-temperature regenerator 1, and the refrigerant contained in the medium-concentration absorption liquid The low-temperature regenerator 2 for vaporizing and separating the high-concentration absorption liquid and the refrigerant, and the condensing heat exchanger 31 through which the cooling water 340 passes are arranged and separated by the high-temperature regenerator 1 and the low-temperature regenerator 2. A condenser 3 for cooling the vaporized refrigerant (steam) to return it to a liquid refrigerant (water), an evaporator 4 for evaporating the liquid refrigerant (water) liquefied in the condenser 3 under substantially vacuum, and a cooling water 34.
An absorption heat exchanger 34 through which 0 passes is disposed, and an absorber 5 for absorbing the vaporized refrigerant evaporated in the evaporator 4 into the high-concentration absorption liquid obtained in the low-temperature regenerator 2 and a heating chamber from the absorber 5 are provided. Absorption liquid pump 6 for transferring the absorption liquid to 12, and absorption heat exchanger 3
4 and cooling heat exchanger 31 that has passed through the heat exchanger 31 for condensing flows from the upper side to the lower side to cool the cooling water 340.
And a cooling water reservoir 81 provided below the cooling tower 8 for storing the cooling water 340, and a Lo level switch 81 for detecting a low water level and a high water level of the cooling water 340 in the cooling water reservoir 81.
1, a Hi level switch 812, a water supply valve (not shown) that replenishes the cooling water 340 in the cooling water reservoir 81, and an electric motor for cooling water that transfers the cooling water 340 in the cooling water reservoir 81 to the absorption heat exchanger 34. The pump 82, the absorption liquid pump 6, the electric cooling pump 82 for cooling water, and the control apparatus 9 which controls a water supply valve etc. are provided.

During the cooling operation, the liquid refrigerant (water) evaporates in the evaporator 4, so that the heat medium (cold hot water) passing through the evaporator 4
The cooled heat medium is heat-exchanged with the air blown into the room by the indoor heat exchanger 7 arranged in the room to cool the room. The air blown into the room and the heat medium whose temperature has been raised by exchanging heat in the indoor heat exchanger 7 are cooled again in the evaporator 4.

Vaporized refrigerant (steam) evaporated in the evaporator 4
Is absorbed by the absorber 5 in the high-concentration absorbent. At this time, heat of absorption is generated and the temperature of the absorbing liquid rises. Therefore, in order to enhance the absorption capacity of the high-concentration absorbent supplied to the absorber 5, the absorber 5 is provided with the absorption heat exchanger 34 and the cooling water 340.
Is supplied.

In the condenser 3, a condensing heat exchanger 31 for liquefying the vaporized refrigerant (steam) having a relatively high temperature generated in the low temperature regenerator 2 is wound and passed through the absorption heat exchanger 34. Cooling water 340 passes through. Then, the cooling water 340 that has passed through the absorber 5 and the condenser 3 and has been heated up is cooled by the cooling tower 8 provided outdoors, and is again supplied to the absorber 5 and the condenser 3.

The heating chamber 12 in which the blow-out tube 121 standing upright is arranged in the upper part is made of stainless steel which is not easily affected by the absorbing liquid, and heats the low-concentration absorbing liquid by the heat of gas combustion of the gas burner 11. Further, the heating chamber 12 has a temperature sensor 12 for measuring the temperature of the low-concentration absorption liquid in the heating chamber 12.
0 is set.

The gas burner 11 is of the Bunsen type and is supplied with gas by a gas pipe in which two gas solenoid valves and a gas proportional valve (not shown) are connected in series, and is burned by a combustion fan (not shown). Air is supplied and burns.

The low-concentration absorbent that boils in the heating chamber 12 is
It is blown into the high temperature regenerator 1 together with the vaporized refrigerant (steam). The high-temperature low-concentration absorption liquid blown into the high-temperature regenerator 1 collides with the gas-liquid separation baffle 10a and drops around the blowout tube 121 to become a medium-concentration absorption liquid.

In order to separate the medium-concentration absorbing liquid and the liquid refrigerant (water), a partition cylinder 13 is provided in the high temperature regenerator 1 between the blowout cylinder 121 and the high temperature regenerator 1. Then, the refrigerant separated to the outside of the partition cylinder 13 is supplied to the condenser 3 through the pipe 14 connected to the lower portion. Also, the partition cylinder 1
The medium-concentration absorption liquid separated between the inside of 3 and the blowout tube 121 is supplied to the low temperature regenerator 2 through the medium-concentration absorption liquid pipe 15 connected to the lower part. It should be noted that the medium concentration absorption liquid pipe 15
An orifice 16 is arranged in the passage.

The low-temperature regenerator 2 is provided with a low-temperature regenerator 20 in the shape of a tubular container that covers the high-temperature regenerator 1, and the medium-concentration absorbent supplied through the medium-concentration absorbent piping 15 is regenerated by the high-temperature regenerator 1.
It is injected toward the ceiling part of 0.

Since the temperature inside the low temperature regeneration container 20 is lower than the temperature inside the high temperature regeneration container 10, the pressure inside the low temperature regeneration container 20 is lower than the pressure inside the high temperature regeneration container 10. Therefore, the medium-concentration absorption liquid supplied from the medium-concentration absorption liquid pipe 15 into the low-temperature regeneration container 20 is easily evaporated, and the medium-concentration absorption liquid is injected into the ceiling portion of the high-temperature regeneration container 10,
The medium-concentration absorbent is heated by the peripheral wall of the high-temperature regeneration container 10 and the liquid refrigerant (water) evaporates, so that the medium-concentration absorbent becomes a high-concentration absorbent.

Here, the upper part of the low temperature regeneration container 20 communicates with the upper part of the annular container-shaped condensing container 30 by the communication part 301. Therefore, the vaporized refrigerant (water vapor) that has evaporated in the low temperature regeneration container 20 passes through the communication section 301 and is condensed into the condensation container 30.
Supplied within. On the other hand, the high-concentration absorbent is dropped to the lower part of the low-temperature regeneration container 20, and is supplied to the absorber 5 through the high-concentration absorbent liquid pipe 21 connected to the lower part of the low-temperature regeneration container 20.

A ceiling plate 22 is provided above the low temperature regeneration container 20, and a gap 201 through which water vapor passes is provided between the outer peripheral end of the ceiling plate 22 and the low temperature regeneration container 20. There is.

The condenser 3 is provided with the condensation container 30 in the shape of an annular container as described above. Inside the condensing container 30,
A condensing heat exchanger 31 that cools and liquefies the vaporized refrigerant (steam) in the condensing container 30 is arranged. The heat exchanger 31 for condensation is an annular coil, and the inside of the cooling water 3
40 flows. Then, from the low temperature regenerator 2 to the condensing container 30
The vaporized refrigerant supplied inside is cooled by the heat exchanger 31 for condensation to become a liquid refrigerant (water).

Refrigerant is supplied to the inside of the condensing container 30 from the high temperature regenerator 1 through the pipe 14 from the lower side of the container and re-boils due to the difference in pressure (the inside of the condensing container 30 has a low pressure of 70 mmHg), and the condensing container 30 Inside, the vaporized refrigerant and the liquefied refrigerant are in a mixed state.

In the condensing container 30, the liquid refrigerant is evaporated.
A refrigerant pipe 32 that leads to is connected. This refrigerant pipe 3
2 is provided with a refrigerant valve 321 that opens by energization,
During the opening of the valve, the liquid refrigerant (water) is supplied from the condensing container 30 to the evaporator 4.

The evaporator 4 is provided in the lower part of the condensing container 30 together with the absorber 5, and is provided with an annular container-shaped evaporative absorption container 50 arranged around the low temperature regeneration container 20. An evaporation heat exchanger 33 that evaporates the liquid refrigerant (water) supplied from the condenser 3 is disposed outside the evaporation / absorption container 50. The evaporation heat exchanger 33 is an annular coil, and the heat medium (cold hot water) supplied to the indoor heat exchanger 7 flows inside. Then, from the condenser 3 to the refrigerant pipe 3
The liquid refrigerant (water) supplied via 2 is sprayed on the evaporation heat exchanger 33 from the refrigerant spraying tool 322 arranged on the evaporation heat exchanger 33.

The inside of the evaporative absorption container 50 is substantially vacuum (about 6.5).
Since it is maintained at mmHg), the boiling point is low, and the liquefied refrigerant scattered on the evaporation heat exchanger 33 is in a state of being very easily evaporated. Then, the liquid refrigerant (water) sprinkled on the evaporation heat exchanger 33 absorbs heat of vaporization from the heat medium flowing in the evaporation heat exchanger 33 and evaporates.

As a result, the heat medium (cold water) flowing in the evaporation heat exchanger 33 is cooled. Then, the cooled heat medium is guided to the indoor heat exchanger 7 and exchanges heat with the air blown into the room to cool the room.

The absorber 5 is, as described above, the evaporation absorption container 5
Equipped with 0. Then, the absorber 5 is the high-concentration absorbent liquid pipe 2
An absorption heat exchanger 34 that cools the high-concentration absorption liquid supplied from No. 1 is arranged. This absorption heat exchanger 34 is
It is an annular coil, and the cooling water 340 supplied to the heat exchanger 31 for condensation flows inside. On the other hand, on the upper part of the absorption heat exchanger 34, there is arranged an absorption liquid spraying tool 36 for spraying the high-concentration absorption liquid supplied from the high-concentration absorption liquid pipe 21 onto the absorption heat exchanger 34.

The high-concentration absorbent dispersed in the absorption heat exchanger 34 drops from the upper side to the lower side, and the vaporized refrigerant (steam) evaporated from the evaporation heat exchanger 33 into the evaporation absorption container 50. Absorbs.

Therefore, at the bottom of the absorption heat exchanger 34, a low-concentration absorption liquid pipe 35 for supplying the low-concentration absorption liquid to the heating chamber 12 is connected. The low-concentration absorption liquid pipe 35 is provided with an absorption liquid pump 6 for transferring the low-concentration absorption liquid from the condensing container 30 in a substantially vacuum state to the heating chamber 12.

In this embodiment, the absorbing liquid pump 6 is an alternating current 2
It is a centrifugal pump of 4V and maximum power consumption 120W, and a Hall IC 61 (rotation speed sensor) for detecting the rotation speed is attached. This absorption liquid pump 6 includes a temperature sensor 1
Feedback control is performed by the control device 9 so that the rotation speed is adapted to the detected temperature T detected by 20.

The indoor heat exchanger 7 exchanges heat between the heat medium passing through the inside and the air blown into the room. The heat medium that has passed through the indoor heat exchanger 7 is an electric pump 37 for cold / hot water.
Is sent to the heat exchanger 33 for evaporation by the indoor heat exchanger 7
And the heat exchanger 33 for evaporation.

On the other hand, in the indoor heat exchanger 7, the heat medium flowing through the indoor heat exchanger 7 and the air blown into the room are forcibly heat-exchanged, and the air after the heat exchange is blown out into the room. An indoor electric fan 71 is arranged.

The cooling tower 8 causes the cooling water 340 passing through the absorption heat exchanger 34 and the condensation heat exchanger 31 to flow from the upper side to the lower side, and exchanges heat with the outside air while the cooling water 340 is flowing. The heat is radiated and a part of it is evaporated to cool the cooling water 340 by the heat of vaporization.

The cooling water 340 cooled in the cooling tower 8 is guided to the cooling water reservoir 81 provided in the lower portion, and this cooling water reservoir 8
From 1 to the cooling water electric pump 82, the cooling water 340
Is supplied to the absorption heat exchanger 34 and the condensation heat exchanger 31.

The lower part and the upper part in the cooling water reservoir 81 are respectively
Lo level switch 811, Hi level switch 812
Is provided. The cooling water 340 in the cooling water reservoir 81 is L
The Lo level switch 811 is turned on when it is at the o level switch 811 position or higher, and the Hi level switch 812 is turned on when the cooling water 340 is at the Hi level switch 812 position or higher.

Further, a water supply valve 342 is arranged in a water conduit 341 for guiding the cooling water 340 (tap water) to the cooling water reservoir 81, and the cooling water 340 is cooled when the valve is opened based on a signal from the control device 9. The water 81 is replenished. Although water is replenished from the empty state to the Hi level switch 812,
It takes about 8 minutes (normal).

The cooling tower 8 is equipped with an outdoor electric fan 80 for supplementing cooling water. This outdoor electric fan 80
Is to generate an air flow in the cooling tower 8 and to accelerate the cooling of the cooling water 340 in the cooling tower 8.

151 is a high temperature regenerator 1 to a low temperature regenerator 2.
Is a high-temperature heat exchanger that exchanges heat between the medium-concentration absorption liquid flowing to the heating chamber 12 and the low-concentration absorption liquid flowing from the absorber 5 to the heating chamber 12,
The medium-concentration absorption liquid flowing from the high-temperature regenerator 1 to the low-temperature regenerator 2 is cooled, and conversely, the low-concentration absorption liquid flowing from the absorber 5 to the heating chamber 12 is heated.

Reference numeral 211 denotes a low temperature heat exchanger for exchanging heat between the high concentration absorbent flowing from the low temperature regenerator 2 to the absorber 5 and the low concentration absorbent flowing from the absorber 5 to the heating chamber 12. The high-concentration absorption liquid flowing from the absorber 5 to the absorber 5 is cooled, and conversely, the low-concentration absorption liquid flowing from the absorber 5 to the heating chamber 12 is heated.

Next, the operation of the absorption type cooling and heating apparatus A when the user presses the cooling operation switch (not shown) to give the instruction to start the cooling operation will be described with reference to the flowchart shown in FIG.

In step s1, the microcomputer of the control device 9 determines whether or not the Hi level switch 812 is on, and if it is on (YES),
After instructing the water supply valve to be closed, step s2
If it is off (NO), the process proceeds to step s11.

In step s2, the controller 9 instructs the combustor to burn the gas burner 11 by instructing the solenoid valve to open, the gas proportional valve to the ignition opening state, the ignition device to operate, and the combustion fan to reach the ignition speed. Set to the state (cooling operation starts), and step s
Go to 3.

At the start of the cooling operation, the microcomputer of the control device 9 activates the absorption liquid pump 6 when the detection temperature T reaches 100 ° C., and the absorption liquid pump 6 operates at the set rotation speed corresponding to the detection temperature T. Feedback control is performed so that it rotates.

When the detected temperature T exceeds 175 ° C. in an overheated state, the microcomputer of the control device 9 displays "overheat error" and instructs the combustion of the gas burner 11 to stop.
According to the above, the number of rotations of the absorbent pump 6 is lowered (dilution operation), and the absorbent pump 6 is stopped when the detected temperature T drops to 110 ° C.

In step s3, the microcomputer of the control device 9 determines whether or not the Lo level switch 811 is in the on state. If it is in the on state (YES), the process proceeds to step s4, and if it is in the off state ( (NO) advances to step s7.

In step s4, the microcomputer of the control device 9 determines whether or not the cooling operation stop instruction is issued, and if it is issued (YES; if the user presses the cooling operation switch). Go to step s5,
If not issued (NO), the process returns to step s3.

In step s5, the microcomputer of the controller 9 instructs the gas burner 11 to close by closing the electromagnetic valve that controls the gas supply to the gas burner 11, and extinguishes the gas burner 11 to perform the dilution operation described later.

When the dilution operation is completed, in step s6, the microcomputer of the control device 9 causes the combustion blower, the cooling water electric pump 82, and the outdoor electric fan 80.
Then, the operation of the combustion device 9 is stopped.

At step s7, the microcomputer of the control device 9 instructs the water supply valve 342 arranged in the water conduit 341 for guiding the cooling water 340 to the cooling water reservoir 81 to open, and then proceeds to step s8. The water replenishment is continued until the Hi level switch 812 is turned on.

In step s8, the microcomputer of the control device 9 determines whether or not 15 minutes have passed since the valve opening instruction was issued, and when 15 minutes have passed (YES)
Proceeds to step s9, and if not elapsed (NO), returns to step s3.

In step s9, the microcomputer of the controller 9 extinguishes the gas burner 11 by instructing the electromagnetic valve that controls the gas supply to the gas burner 11 to close.
In addition, a lamp (not shown) indicating "insufficient cooling water" is turned on to notify an error, and the following dilution operation is performed.

[Dilution operation] As the detection temperature T decreases, the rotation speed of the absorbing liquid pump 6 is decreased so that the detection temperature T becomes 11
When the temperature drops to 0 ° C., the absorption liquid pump 6 is stopped (dilution operation completed). During the dilution operation, the electric pump for cold and hot water 3
7 and the indoor electric fan 71 are stopped, and the blower for combustion (not shown), the cooling water electric pump 82, and the outdoor electric fan 80 continue to operate to prevent precipitation of the absorbing liquid.

When the dilution operation is completed, in step s10, the microcomputer of the control device 9 causes the combustion blower, the cooling water electric pump 82, and the outdoor electric fan 8 to operate.
The operation of the absorption type cooling and heating apparatus A is stopped by instructing the operation of 0 to stop. The lighting state of the lamp (not shown) is maintained.

In step s11, the microcomputer of the control device 9 instructs the water supply valve 342 arranged in the water conduit 341 for guiding the cooling water 340 to the cooling water reservoir 81 to open, and the process returns to step s1.

Next, the advantages of the absorption type cooling and heating apparatus A of this embodiment will be described. [A] During cooling operation {YE in step s2 → step s3
S → NO in step s4 → Lo level switch 811 turns off {NO in step s3}
Then, the microcomputer of the control device 9 instructs the water supply valve 342 arranged in the water conduit 341 for guiding the cooling water 340 to the cooling water reservoir 81 to be in the open state {step s7}. Then, if the Lo level switch 811 does not turn on 15 minutes after the instruction, {Y at step s8.
In ES}, the gas burner 11 is extinguished and the above-described dilution operation is performed.

Therefore, when the cooling water 340 is insufficient due to a failure of the water supply valve, a failure of the drive circuit for driving the water supply valve, water cutoff, leakage of the cooling water, etc., the absorption liquid is not deposited and the heating chamber is not deposited. It is possible to stop the absorption cooling / heating apparatus A early without waiting for the operation stop (it takes a long time) due to the detection of the abnormal temperature rise of 12.

It should be noted that the cooling water 340 can be circulated by the cooling water 340 in the pipeline for several tens of minutes after the Lo level switch 811 is turned off, so that there is no problem in the dilution operation.

[B] When the cooling operation start command is issued, the absorption type cooling and heating apparatus A starts the cooling operation after confirming that the Hi level switch 812 is on {YES in step s1}. That is, the cooling operation is not started in the case where a water supply valve failure, a drive circuit driving the water supply valve failure, water cutoff, cooling water leakage, and the like are considered.
Therefore, the abnormal state expected after the start of the cooling operation can be prevented by not starting the cooling operation, and the maintainability is excellent.

[C] If the Lo level switch 811 is turned on within 15 minutes from the water refilling instruction, the operation does not go to step s9. Therefore, when the water supply is restored in a short time, the cooling operation is continued and the cooling operation is continued. Since it is not interrupted, it is easy to use.

Next, as a second embodiment, FIG. 3 shows the operation of the absorption type cooling and heating apparatus B when the user presses a cooling operation switch (not shown) to give an instruction to start the cooling operation. It will be described together with the flowchart.

In step S1, the microcomputer of the control device 9 determines whether or not the Hi level switch 812 is on, and if it is on (YES),
After instructing the water supply valve to be closed, step S2
If it is in the off state (NO), the process proceeds to step S11.

In step S2, the control device 9 combusts the gas burner 11 by instructing the solenoid valve to open, the gas proportional valve to the ignition opening state, the ignition device to operate, and the combustion fan to reach the ignition speed. Set to the state (cooling operation starts), and step S
Go to 3.

At the start of the cooling operation, the microcomputer of the control device 9 activates the absorbent pump 6 when the detected temperature T reaches 100 ° C., and the absorbent pump 6 operates at the set rotation speed corresponding to the detected temperature T. Feedback control is performed so that it rotates.

When the detected temperature T exceeds 175 ° C. in the overheated state, the microcomputer of the control device 9 displays "overheat error" and instructs the combustion stop of the gas burner 11 to detect the detected temperature T.
According to the above, the number of rotations of the absorbent pump 6 is lowered (dilution operation), and the absorbent pump 6 is stopped when the detected temperature T drops to 110 ° C.

In step S3, the microcomputer of the control device 9 determines whether or not the Lo level switch 811 is in the on state. If it is in the on state (YES), the process proceeds to step S4, and if it is in the off state ( (NO) advances to step s7.

In step S4, the microcomputer of the control device 9 determines whether or not the cooling operation stop instruction is issued, and if it is issued (YES; if the user presses the cooling operation switch). Go to step S5,
If not issued (NO), the process returns to step S3.

In step S5, the microcomputer of the control device 9 instructs the water supply valve 342 to be in the closed state, and also instructs the electromagnetic valve controlling the gas supply to the gas burner 11 to be closed. Extinguish 11 and perform a dilution operation.

When the dilution operation is completed, in step S6, the microcomputer of the control device 9 causes the combustion blower, the cooling water electric pump 82, and the outdoor electric fan 80.
Is instructed to stop, and the operation of the absorption type cooling and heating apparatus B is stopped.

In step S7, the microcomputer of the controller 9 instructs the water supply valve 342 arranged in the water conduit 341 for guiding the cooling water 340 to the cooling water reservoir 81 to open (or maintain the valve open). , And proceeds to step S8.

In step S8, the microcomputer of the control device 9 determines whether or not 18 minutes have passed since the valve opening instruction was issued, and when 18 minutes have passed (YES)
Goes to step S9 after instructing the water supply valve 342 to be in the closed state. If not (NO), goes to step S12.

At step S9, the microcomputer of the control device 9 extinguishes the gas burner 11 by instructing the electromagnetic valve that controls the gas supply to the gas burner 11 to be closed.
A lamp (not shown) indicating "insufficient cooling water" is turned on to notify the error, and the above-described dilution operation is performed.

Upon completion of the dilution operation, in step S10, the microcomputer of the control device 9 causes the combustion blower, the cooling water electric pump 82, and the outdoor electric fan 8 to operate.
The operation of the absorption type cooling and heating apparatus B is stopped by instructing the operation of 0 to stop. The lighting state of the lamp (not shown) is maintained.

In step S11, the microcomputer of the control device 9 instructs the water supply valve 342 arranged in the water conduit 341 for guiding the cooling water 340 to the cooling water reservoir 81 to open, and the process returns to step S1.

In step S12, the microcomputer of the control device 9 determines whether or not the cooling operation stop instruction is issued, and if it is issued (YES; when the user presses the cooling operation switch). The process proceeds to step S5, and if not issued (NO), the process proceeds to step S13.

In step S13, the microcomputer of the control device 9 determines whether or not the Hi level switch 812 is on, and if it is on (YES),
After instructing the water supply valve 342 to be in the closed state, the process returns to step S3, and in the case of the off state (NO), step S7.
Return to

Next, the advantages of the absorption type cooling and heating apparatus B of this embodiment will be described. [D] During cooling operation {Step S2 → YE in Step S3
S → step S4 NO → step S3} Lo level switch 811 is turned off {NO at step S3}
Then, the microcomputer of the control device 9 gives an instruction to open the water supply valve 342 arranged in the water conduit 341 for guiding the cooling water 340 to the cooling water reservoir 81 {step S7}. Then, if the Hi level switch 812 does not turn on 18 minutes after the instruction is given {Y at step S8.
In ES}, the gas burner 11 is extinguished and the above-described dilution operation is performed.

Therefore, when the cooling water 340 is insufficient due to a failure of the water supply valve, a failure of the drive circuit for driving the water supply valve, water cutoff, leakage of cooling water, etc., the absorption liquid is not deposited and the heating chamber The absorption type cooling and heating apparatus B can be stopped early without waiting for the operation stop (it takes a long time) due to the detection of the abnormal temperature rise of 12.

It should be noted that the cooling water 340 can be circulated by the cooling water 340 in the pipeline for about several tens of minutes after the Lo level switch 811 is turned off, so that there is no hindrance to the dilution operation.

[E] When the cooling operation start instruction is issued, the absorption type cooling and heating apparatus B starts the cooling operation after confirming that the Hi level switch 812 is on {YES in step S1}. That is, the cooling operation is not started in the case where a water supply valve failure, a drive circuit driving the water supply valve failure, water cutoff, cooling water leakage, and the like are considered.
Therefore, the abnormal state expected after the start of the cooling operation can be prevented by not starting the cooling operation, and the maintainability is excellent.

[F] If the Hi level switch 812 is turned on within 18 minutes from the water refilling instruction, the system does not go to step S9. Therefore, when the water supply is restored in a short time, the cooling operation is continued and the cooling operation is continued. Since it is not interrupted, it is easy to use.

The present invention includes the following embodiments in addition to the above embodiments. a. In the above-described embodiment, an example of application to a double-effect absorption-type heating and cooling device is shown, but it may be applied to a single-effect absorption-type heating and cooling device of multiple-effect type.

B. As the absorbing liquid, an aqueous ammonia solution (in this case, the refrigerant becomes ammonia) or the like may be used in addition to the lithium bromide aqueous solution. c. The heating source may be an electric heater other than the gas burner 11.

[Brief description of drawings]

FIG. 1 is a principle explanatory view of an absorption type cooling and heating apparatus according to first and second embodiments of the present invention.

FIG. 2 is a flowchart illustrating the operation of the absorption type cooling and heating apparatus according to the first embodiment.

FIG. 3 is a flowchart illustrating an operation of the absorption type cooling and heating apparatus according to the second embodiment.

[Explanation of symbols]

 A, B Absorption type air conditioner (absorption type refrigeration cycle device) 1 High temperature regenerator (regenerator) 2 Low temperature regenerator (regenerator) 3 Condenser 4 Evaporator 5 Absorber 6 Absorbing liquid pump 8 Cooling tower 9 Control device ( Operation controller) 11 Gas burner (heating source) 12 Heating chamber 31 Condensing heat exchanger 34 Absorption heat exchanger 81 Cooling water reservoir 82 Cooling water electric pump (cooling water pump) 120 Temperature sensor 340 Cooling water 811 Lo level switch ( Water level detection means) 812 Hi level switch (water level detection means)

Claims (3)

[Claims] 1. A regenerator having a heating chamber in which an absorbing liquid is placed and heated by a heating source, and a regenerator for vaporizing the absorbing liquid to separate it into a concentrated absorbing liquid and a refrigerant; and a heat for condensation through which cooling water passes. A condenser, in which an exchanger is arranged, cools the liquefied refrigerant generated in the regenerator to liquefy it, an evaporator that evaporates the liquefied refrigerant liquefied in the condenser under reduced pressure, and an absorption heat that the cooling water passes through. An absorber that arranges an exchanger and absorbs the vaporized refrigerant evaporated in the evaporator into the concentrated absorption liquid separated by the regenerator; and an absorption liquid pump that transfers the absorption liquid from the absorption device to the heating chamber. And a cooling tower that cools the cooling water by flowing cooling water that has passed through the absorption heat exchanger and the condensation heat exchanger from above to below, and is provided below the cooling tower to store the cooling water. Set the cooling water reservoir and the specified level of cooling water in the cooling water reservoir. Water level detecting means for discharging, water supply means for replenishing the cooling water to the cooling water reservoir, a cooling water pump for transferring the cooling water in the cooling water reservoir to the absorption heat exchanger, the heating source, the absorption liquid pump, The cooling controller includes an operation controller that controls the water supply means and the cooling water pump. During the cooling operation, the operation controller activates the water supply means when the water level detection means detects a water level lower than a predetermined water level and performs a cooling operation. If the water level detecting means does not detect a water level equal to or higher than the predetermined water level even after a predetermined time has elapsed, the operation of the heating source is stopped and the operation of the absorbent pump and the cooling water pump is continued. Absorption type refrigeration cycle device that performs dilution operation. 2. A regenerator having a heating chamber in which an absorption liquid is placed and heated by a heat source, and a regenerator for vaporizing the absorption liquid to separate it into a concentrated absorption liquid and a refrigerant; and a heat for condensation through which cooling water passes. A condenser, in which an exchanger is arranged, cools the liquefied refrigerant generated in the regenerator to liquefy it, an evaporator that evaporates the liquefied refrigerant liquefied in the condenser under reduced pressure, and an absorption heat that the cooling water passes through. An absorber that arranges an exchanger and absorbs the vaporized refrigerant evaporated in the evaporator into the concentrated absorption liquid separated by the regenerator; and an absorption liquid pump that transfers the absorption liquid from the absorption device to the heating chamber. And a cooling tower that cools the cooling water by flowing cooling water that has passed through the absorption heat exchanger and the condensation heat exchanger from above to below, and is provided below the cooling tower to store the cooling water. The cooling water pool and the cooling water in the cooling water pool have a low water level and Water level detection means for detecting a high water level, water supply means for supplying cooling water to the cooling water reservoir, cooling water pump for transferring the cooling water in the cooling water reservoir to the absorption heat exchanger, the heating source, the absorption A liquid pump, the water supply means, and an operation controller for controlling the cooling water pump, wherein the water level detection means detects a high water level of the cooling water,
The cooling operation can be started by the operation controller, and during the cooling operation, when the water level detection means detects less than a low water level, the operation controller operates the water supply means to continue the cooling operation, When the water level detecting means does not detect a water level equal to or lower than the low water level even after a lapse of time, the operation of the heating source is stopped and the dilution operation for continuing the operation of the absorbent pump and the cooling water pump is performed. Absorption type refrigeration cycle device. 3. A regenerator having a heating chamber in which an absorbing liquid is placed and heated by a heat source, and a regenerator for vaporizing the absorbing liquid to separate it into a concentrated absorbing liquid and a refrigerant, and a heat for condensation through which cooling water passes. A condenser, in which an exchanger is arranged, cools the liquefied refrigerant generated in the regenerator to liquefy it, an evaporator that evaporates the liquefied refrigerant liquefied in the condenser under reduced pressure, and an absorption heat that the cooling water passes through. An absorber that arranges an exchanger and absorbs the vaporized refrigerant evaporated in the evaporator into the concentrated absorption liquid separated by the regenerator; and an absorption liquid pump that transfers the absorption liquid from the absorption device to the heating chamber. And a cooling tower that cools the cooling water by flowing cooling water that has passed through the absorption heat exchanger and the condensation heat exchanger from above to below, and is provided below the cooling tower to store the cooling water. The cooling water pool and the cooling water in the cooling water pool have a low water level and Water level detection means for detecting a high water level, water supply means for supplying cooling water to the cooling water reservoir, cooling water pump for transferring the cooling water in the cooling water reservoir to the absorption heat exchanger, the heating source, the absorption A liquid pump, the water supply means, and an operation controller for controlling the cooling water pump, wherein the water level detection means detects a high water level of the cooling water,
The cooling operation can be started by the operation controller, and during the cooling operation, when the water level detection means detects less than a low water level, the operation controller operates the water supply means to continue the cooling operation, When the water level detecting means does not detect a water level higher than the high water level even after a lapse of time, the operation of the heating source is stopped and the dilution operation for continuing the operation of the absorbent pump and the cooling water pump is performed. Absorption type refrigeration cycle device.