JP3162858B2 - Absorption chiller / heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption chiller / heater for supplying cold water or hot water using an absorption liquid in which a heat absorbent is mixed with an evaporable refrigerant.

[0002]

2. Description of the Related Art As an apparatus of this kind, for example, an absorption chiller / heater using an absorbing liquid such as an aqueous solution of lithium bromide in which lithium bromide is used as an absorbent and water is used as a refrigerant is known. There is one configured as a water heater / cooler 100.

In FIG. 5, a thick solid line indicates a liquid conduit for a refrigerant liquid, an absorbing liquid and cooling water, and a double line indicates a vapor line for a refrigerant vapor. 1
Low concentration absorbing solution stored at the bottom of
A description will be made with reference to FIG.

[0004] The dilute solution 2a enters the high temperature regenerator 5 via the pipe 3 by the pump P1. Since the high temperature regenerator 5 is heated from below by a heater 6 such as a burner, the diluted liquid 2a
The refrigerant contained therein evaporates and separates into a high-temperature, medium-concentration absorbent, that is, an intermediate liquid 2b and refrigerant vapor 7a.

[0005] The high-temperature intermediate liquid 2 b enters a high-temperature-side heat exchanger 9 via a pipe 8. In the heat exchanger 9, the high-temperature intermediate liquid 2
b gives heat to the dilute solution 2a passing through the pipe 3 to radiate heat, and after the temperature drops, enters the low-temperature regenerator 11 via the pipe 10.

In the low-temperature regenerator 11, the refrigerant vapor 7 a is sent to the radiating pipe 11 A in the low-temperature regenerator 11 for heating the intermediate liquid 2 b via the pipe 21 and is heated.
The refrigerant contained in b evaporates and separates into a high-temperature, high-concentration absorbent, that is, a concentrated liquid 2c, and refrigerant vapor 7b.

The high-temperature concentrated liquid 2 c enters the low-temperature heat exchanger 13 via the pipe 12. In the heat exchanger 13, the high-temperature concentrated liquid 2 c gives heat to the diluted liquid 2 a passing through the pipe 3, radiates heat, and after reaching a medium temperature, passes through the pipe 14 and spreads the sprayer 1 in the absorber 1.
A, and sprays from many holes of the sprayer 1A.

The sprayed concentrated liquid 2c is cooled by cooling water 32a flowing through a cooling pipe 1B in the absorber 1. When flowing down the outside of the cooling pipe 1B, the concentrated liquid 2c absorbs and dilutes the refrigerant vapor 7c entering from the adjacent evaporator 26, returns to the low-temperature diluted liquid 2a, and completes the absorption liquid. The absorption liquid circulation is repeated.

Next, the refrigerant circulation system will be described with the refrigerant vapor 7C entering the absorber 1 as a starting point. The refrigerant vapor 7c is
As described in the above-described absorbent circulation system, the concentrated liquid 2c dispersed from the sprayer 1A in the absorber 1 absorbs the diluted liquid 2a.
Into the refrigerant vapor 7a in the high-temperature regenerator 5.

The refrigerant vapor 7a enters the radiating pipe 11A of the low-temperature regenerator 11 via the pipe 21, gives heat to the intermediate liquid 2b to radiate heat, condenses into the refrigerant liquid 24a, and then changes to the pipe 22.
And enters the bottom of the condenser 23.

The condenser 23 is provided with a refrigerant vapor 7b which enters through a number of passages 11B between the adjacent low-temperature regenerators 11b.
To the cooling water 32a passing through the cooling pipe 23A in the condenser 23.
And condenses the refrigerant vapor 7b to produce a low-temperature refrigerant liquid 24a.
To The refrigerant liquid 24a passes through a pipe 25 and passes through an evaporator 26.
, And accumulates in the lower part of the evaporator 26 to become the refrigerant liquid 24b.

The pump P3 supplies the refrigerant liquid 24b to the pipe 28
Is sent to the sprayer 26A, and the spraying from a number of holes of the sprayer 26A is repeated. Sprayed refrigerant liquid 24b
Is a fluid to be heated which passes through a heat exchange pipe 26B in the evaporator 26,
That is, the cold / warm water 35a is cooled. During this cooling, the refrigerant liquid 24b absorbs heat from the cold / warm water 35a and evaporates to become refrigerant vapor 7c.
Then, the refrigerant returns to the absorber 1 through a large number of passages 26C, and the circulation of the refrigerant is completed.

As described above, by the double regeneration operation of the high-temperature regenerator 5 and the low-temperature regenerator 11, the heat exchange pipe 2 in the evaporator 26 is circulated while circulating the absorbing liquid and the refrigerant, that is, the heat operating fluid.
6B, that is, the heat-operated fluid supplied from the pipe 36, that is, the cooling / rewarming water 35a, is cooled by the heat exchange pipe, and the chilled water 35b is cooled from the pipe 37 to the cooling target device such as an indoor cooling device (FIG. (Not shown) as a heat-receiving operation fluid for cooling is referred to as a double-effect cooling operation, and is also referred to as a cooling operation because it is mainly used for cooling.

On the other hand, the refrigerant vapor 7a evaporated in the high-temperature regenerator 5 and the high-temperature intermediate liquid 2b to be put in the high-temperature heat exchanger 9 are passed to the evaporator 26 or the absorber 1 by a bypass 41 Open the on-off valve V1 provided in the evaporator 2 directly.
6 or the absorber 1, the refrigerant liquid 24b to be sprayed from the sprayer 26A is opened and closed by opening the on-off valve V2 provided in the pipe 43 bypassing between the pipe 28 and the pipe 3, and the refrigerant liquid 2b is opened.
4b is mixed with the absorbing solution 2a.
The heat exchange pipe 2 in the evaporator 26 is circulated by the operation of only the high-temperature regenerator 5 and the circulation of the absorbing liquid and the circulation of the refrigerant without using
6B, that is, the heat-operated fluid supplied from the pipe 36, that is, the cold / reheated water 35a, is heated by the heat exchange pipe, and the warm water 35b is heated from the pipe 37 to the heating target device such as an indoor heating device. The operation given to the heating operation fluid for heating (not shown) is called a heating operation (boiler operation), and is also called a heating operation because it is mainly used for heating. During this cooling operation, the absorber 1 and the condenser 23
And cooling water 32a from line 31
Water supply has been stopped.

The heat dissipating device 50 includes a storage water 59 in a storage tank 59.
A is supplied as cooling water 32a from a pipe 31 and the cooling pipe 1
B and the cooling pipe 23A are cooled,
The cooling water flowing out as 2b is regenerated as cooling water by heat radiation cooling by the radiation cooling unit 51, and is generally referred to as a cooling tower.
Cooling operation only during cooling operation.

The radiation cooling unit 51 includes a blower 52 and a sprayer 5.
3. The air is sucked in by the blower 52 while the pump P2 is operated only during the cooling operation to spray the cooling return water 32b from the sprayer 53 and flow into the cooling layer 54 only during the cooling operation. Cooling layer 54 from port 55A
After passing through the inner layer, the air is ventilated so as to be sent to the air discharge port 55B, so that the sprayed cooling return water 32b is radiated and cooled.

A large number of meandering paths are formed in the cooling layer 54. When the cooling return water 32b flows down the meandering paths, the cooling layer 54 receives the air from the blower 52 to cool the cooling water. It is.

During the heating operation, the pump P2 is stopped, and the flow of the cooling water is stopped. The water remaining in the sprayer 53 is scattered from the sprayer 53 and disappears. The check valve 68 prevents the drainage of the cooling water in the absorption chiller / heater 100 when the storage tank 59 is located lower than the absorption chiller / heater 100. In the case of small and medium absorption chiller / heater,
The storage tank 59 is provided at a position lower than the position of the absorption chiller / heater 100.

When the amount of the stored water 59A becomes equal to or more than a predetermined amount, the water is discharged from the overflow receiver 62 as drainage 65 through the pipes 63 and 64, and when the amount of the stored water 59A becomes equal to or less than the predetermined amount,
A float floats on the surface of the stored water 59A to open the float valve 58 to supply tap water 57, thereby maintaining the stored water 59A at a predetermined amount.

The pipe 61, the overflow receiver 62 and the pipe 63 are blow paths for forcibly draining a part of the cooling water, and disinfecting chlorine in the cooling water and water scale generated in the pipe are radiated by the heat radiating device. In order not to cause excessive concentration in the inside 50, an on-off valve (not shown) of this path is opened to discharge a part of the cooling water, and fresh tap water 57 is taken in from the float valve 58.

The control section 80 is a control section for controlling and processing the above operation of the absorption chiller / heater 100. As described above, the control section 80 opens and closes the on-off valves V1, V2 and pumps P1, P2, P
By controlling the start and stop of 3, the switching operation between the cooling operation and the heating operation is performed, and during each operation,
Cold / hot water 35 to be given to the equipment to be cooled or to be heated
b to maintain a predetermined temperature of b, necessary operation signals given from a setting operation device (not shown) or the like,
Temperature detector S for detecting the temperature of 5a and cold / hot water 35b
1. S2, a heating regulator 6A or a blower for adjusting the heating amount of the heater 6 based on each detection signal given from the temperature detectors S3 and S4 for detecting the temperatures of the cooling water 32a and the cooling return water 32b. The temperature control operation is controlled so as to perform a steady temperature control operation. For this reason, the equipment to be controlled is of an electric type.

The on-off valve V6 is used, for example, in the case where a precipitate is formed at the bottom of the storage tank 59, or in order to prevent the formation of the precipitate beforehand, for example, for the operation of completely discharging and replacing the stored water 59A. By opening the on-off valve V6, the stored water 59 is discharged from the pipe 64 as drainage 65.

The specific configuration of the absorption chiller / heater 100 is described in “Absorptive chiller / heater / absorption chiller / heater C series catalog '9” issued by the present applicant, Sanyo Electric Co., Ltd. in July 1990.
0-7 ", published by Ohmsha in February 1989," Practical Knowledge of Air Conditioning Equipment "or Japanese Patent Application Laid-Open No. 58-12508.

[0024]

In the absorption chiller / heater provided with the cooling water radiator described above, when the operation is switched from the heating operation to the cooling operation, the water remains in the cooling pipe 1B and the cooling pipe 23A. Cooling water is 60 ~
The temperature is as high as about 70 ° C.

The heat radiating device 50 generally needs to be made as light as possible in order to install it on a high place such as a well-ventilated roof, and the heat radiating device 50 is mainly made of a synthetic resin material.
When high-temperature water is sent as above, each part is deformed,
In particular, since the cooling layer 54 is immediately deformed, there is an inconvenience of causing a failure.

For this reason, when the operation is switched, the high-temperature water held in the cooling pipe 1B and the cooling pipe 23A naturally radiates heat from each of the pipes, and the temperature suitable for cooling water, for example, the cooling layer 54 is formed of a vinyl chloride resin material. 50 ° when formed with
The switching is performed after waiting for the temperature to drop below C. In the case of a large device, the amount of water held is large, so the time becomes considerably long, and the air conditioning adjustment to the cooling operation is delayed. However, there are inconveniences such as a rush of complaints to the operator.

Therefore, for example, the opening / closing valve V6 is a manual opening / closing valve, and the pump P2 is set to be manually operable. When the operator or the maintenance service person switches from the heating operation to the cooling operation, first, Open the on-off valve V6 and set the cooling pipe 1
B and the high-temperature water held in the cooling pipe 23A
After draining to 4, the on-off valve V6 is closed, the pump P2 is operated temporarily, and the stored water 59A is newly sent in as cooling water 32a. For example, the temperature detected by the temperature detector S4 is a predetermined temperature value. For example, it is conceivable to make a configuration to shift to the normal cooling operation state by the control unit 80 after confirming that the temperature has reached 35 ° C. In addition to the inconvenience that the waiting time until the heat is dissipated is not eliminated, it also requires troublesome work for the operator, and this troublesome operation must be performed frequently during unstable temperatures such as spring and autumn. There is.

Therefore, there is a problem that provision of a simple device free of such inconvenience is desired.

[0029]

SUMMARY OF THE INVENTION The present invention provides a method for circulating a heat-operated fluid through a required portion of heat exchange equipment including a condenser, an evaporator, and an absorber as described above. The operation is switched from the warming operation that heats the heat-operated fluid passing through the heat exchange pipe to the cooling operation that cools the heat-operated fluid by the above-described circulation, and only when the cooling operation is performed. The above-described heating operation is performed in an absorption chiller / heater in which cooling water passing through a cooling water pipe for cooling required parts is cooled by a radiating cooling unit of a radiating device that cools by a blower and circulated by a pump. If the time from the end time of the cooling operation to the start time of the cooling operation does not exceed the first predetermined time, first cooling means for firstly operating only the blower to send the wind to the radiation cooling unit, and Start operation of blower A second cooling means for operating the blower and the pump to circulate cooling water from a time when a second predetermined time has elapsed to a time when a third predetermined time has elapsed from the first predetermined time; After the passage of time, or the third
After a lapse of a predetermined time, a first configuration in which cooling operation transition means for performing a steady cooling operation is provided, and the first configuration includes the first predetermined time and the third predetermined time, Along with adding time setting means for setting a time determined based on the amount of cooling water held in the cooling water pipe,
Instead of the cooling operation transition means in the first configuration,
A steady-state operation shifting means for shifting to the steady cooling operation after the first predetermined time has elapsed, and forcibly setting the blower to an operating state for a fourth predetermined time after the third predetermined time has elapsed. A forced cooling steady operation shift means for shifting to a steady cooling operation after the steady cooling operation is performed.
By providing an apparatus having the above configuration, the above-mentioned problem can be solved.

[0030]

In the first configuration, the first predetermined time is set to, for example,
By setting the time as long as about 10 hours, after this time elapses, the residual temperature of the cooling water held in the cooling water pipeline will drop to a temperature that does not damage the heat radiation cooling part by natural heat radiation. Therefore, even if the cooling water is circulated, the cooling operation can be performed without any trouble. Before the first predetermined time elapses, the blower first operates to blow air to the heat radiation cooling unit for the second predetermined time. In this way, after the heat radiation cooling unit is temporarily damaged without being damaged even when high-temperature water is supplied, the blower and the cooling water circulation pump operate for the third predetermined time to cool down. In order to circulate the water, the radiator cooling unit initially withstands the pre-cooling during this circulation, and thereafter the cooling water gradually cools down due to the cooling operation by the radiator cooler. After that, shift to the regular cooling operation It acts to be operated safely.

Further, in the second configuration, only when the operation is shifted from the heating operation to the cooling operation, even after the operation is shifted to the steady cooling operation, the blower is forcibly operated for the fourth predetermined time and the radiation cooling is performed. Since the cooling unit is cooled, even if the preheating by the high-temperature cooling water put in the cooling unit at the third predetermined time remains, the cooling unit continues to be cooled for the fourth predetermined time. It works so that the cooling operation of can be performed efficiently.

[0032]

An embodiment will be described below with reference to FIGS.
In these figures, the portions indicated by the same reference numerals as those in FIG. 5 are portions having the same functions as the portions denoted by the same reference numerals described with reference to FIG. 5, and in FIG.
The pipeline and the on-off valve related to circulation are mainly drawn,
In FIG. 5, the heat exchangers 6 and 13 and the absorbing
2b, refrigerant vapors 7a and 7b, and circulating paths for heat operation fluids such as refrigerant liquids 24a and 24b are omitted or simplified by dotted lines.

[First Structure] The structure shown in FIG. 1 is a heat-operated fluid, that is, a heat-operated fluid via a required portion of heat-exchange equipment including a condenser 23, an evaporator 26, and an absorber 1 as shown in FIG. , Absorbing liquids 2a and 2b, refrigerant vapors 7a and 7b, refrigerant liquids 24a and 2
4b and the like, the operation target fluid passing through the heat exchange pipe 26B in the evaporator 26, that is, the cold / hot water 35
a is switched between a cooling operation for cooling a and a heating operation for heating the heat operation fluid by the above-described circulation, and cooling required parts such as the absorber 1 and the condenser 23 only during the cooling operation. Cooling water pipelines 31 ・ 1B ・ 33 ・
In the absorption chiller / heater 100 in which the cooling water 32a given to the 23A and 34 is cooled by the radiator cooling unit 51 of the radiator 50 for cooling by the blower 52 and circulated by the pump P2, the control process according to the flow of FIG. When the time from the end of the heating operation to the start of the cooling operation does not exceed the first predetermined time T1, only the blower 50 is first set to the operating state and the heat radiation cooling unit The first cooling means for cooling the air blower 51 and the blower 50 and the pump P2 are in the operating state from the time when the second predetermined time T2 has elapsed from the start of the operation of the blower 52 to the time when the third predetermined time T3 has elapsed. A second cooling means for circulating cooling water, and a cooling operation for shifting to a steady cooling operation after a first predetermined time T1 has elapsed or after a third predetermined time T3 has elapsed. Are those has a structure provided with a row unit, if necessary, the first predetermined time of the T1
And the third predetermined time T3 are mainly determined by the cooling water pipe 3
The configuration is such that it is possible to provide a time setting means for setting a time determined based on the amount of cooling water (hereinafter referred to as retained cooling water) held in 1.1B / 33 / 23A / 34.

The above control processing is performed by the control unit 80. As shown in FIG. 2, the control unit 80 controls the processing by a microcomputer (CP in the present invention).
U), each setting signal and each detection signal are fetched from the input / output port 81 of the CPU 80, temporarily stored in the working memory 83 of the CPU 80, and stored in the processing memory 54. Based on a stored control processing flow program, reference value data such as predetermined temperature, and arithmetic processing based on time value data such as a waiting time measured by the timer circuit 84, each control signal obtained by performing required control processing is input. In addition to the output from the output port 81, a required one of the contents of the stored data stored in the working memory 83 is given to the display unit 85 and displayed.

The CPU 80 may use either a CPU common to the CPU that performs the steady operation control or a separate CPU. The control processing flow of FIG. It is configured as a [operation switching subroutine] attached to the [control main routine] for performing the operation.

It is to be noted that each predetermined time is set, for example, in the cooling pipe 1B.
-The amount of cooling water held in the cooling pipe 23A is 1
About 60 liters, the temperature of the retained cooling water at the end of the heating operation is about 80 ° C., and the retained cooling water pump P
The circulating water volume of the cooling water by 2 is about 22 liters / second,
The cooling heat capacity per second by the cooling layer 54 of the heat radiation cooling part 51 and the blower 52 is set at about 5.7 ° C. · 22 liters / second, and the heat resistant temperature of the material of the heat radiation cooling part 51 is set at about 50 ° C. It is assumed that

[Control Processing Flow in First Configuration] The operation according to each control processing flow will be specifically described below.
At the start of the control processing flow in the case of the first configuration in FIG. 3, it is assumed that the on-off valve V6 is closed and the pump P2 is stopped.

In FIG. 3, at step SP1, operation data based on a setting operation signal input from a setting operation unit or the like provided on the indoor cooling / heating device side for performing cooling or heating with the fluid to be heated, that is, the cooling / heating water 35b. That is, data such as command data for the switching operation is fetched, and the routine goes to the next step SP2.

In step SP2, it is determined whether or not the operation command data indicates the cooling operation. If the operation command data indicates the cooling operation, the process proceeds to the next step SP3, and if not, the process returns to the control main routine.

At step SP3, the time data T0 from the end of the previous heating operation is fetched, and the routine goes to the next step SP4. The timekeeping data T0 is set in the timekeeping circuit 84 of the CPU 80 so as to start timekeeping every time the heating operation ends, and resets the timekeeping and stops timekeeping when the cooling operation starts. Make it.

In step SP4, it is determined whether or not the clock data T0 has passed a first predetermined time T1.
If the time has elapsed, the process proceeds to step SP9; otherwise, the process proceeds to the next step SP5. Predetermined time T1
Means that the cooling water in the high temperature state is naturally cooled by the radiation of the pipeline of the cooling water and the heat exchange equipment, and the radiation cooling unit 51
A temperature that does not damage the CPU, that is, a time until the temperature is reduced to about 1/2 of the heat-resistant temperature, for example, about 10 hours, is set in advance by the CPU.
It is set by storing it in the working memory 83 of the 80. Also, if necessary, the predetermined time T1 can be set based on the amount of the retained cooling water. Specifically, at the time of trial operation after the installation of the device, it is measured in advance and experimentally determined, or The heat retention can be determined by predicting and calculating the length of the installed pipes 31, 33, 34 and the structure of the heat exchange equipment.

In step SP5, the blower 52 is operated, and the timer 84 is set to the second predetermined time T2.
Is set, and the routine goes to the next step SP6.

In step SP6, the process waits for a predetermined time T2 to elapse, and when a timing end signal is obtained from the timing circuit 84, the process proceeds to the next step SP7. During the predetermined time T2, after the blower 52 starts operating, the blower 52 enters an operation state according to the rating, and the cooling layer 54
The time until the air is sufficiently blown, for example, about 10 seconds, is set by storing it in the working memory 83 of the CPU 80 in advance. Also, a predetermined time T2
The amount of time can be set by experimentally measuring the cooling heat capacity of the radiation cooling unit 51 in advance, or by setting the blower 52 and the cooling tank 54
It may be determined from design constants such as the above, and set with reference to this cooling heat capacity.

In step SP7, the pump P2 is operated while the blower 52 is kept operating, and at the same time, the start of the predetermined time T3 is set in the timer circuit 84, and the process proceeds to the next step SP8.

In step SP8, the system waits for the predetermined time T3 to elapse, and when the timer 84 obtains the end of the time, the pump P2 is temporarily stopped.
Move to the next step SP9. Specifically, the predetermined time T3 can be obtained as a time value T3 obtained by dividing the water amount W1 of the retained cooling water by the circulating water amount W2 per hour of the pump P2, but this calculated value is used to provide a safety value. Should be set to about 1.5 times. Also, during this predetermined time T3, the steady cooling operation control for controlling the operation / stop of the blower 52 based on the detection value of the temperature detector S3 is forcibly released, and the detection value of the temperature detector S3 becomes Irrespective of this, control processing is performed to keep the blower 52 operating.

In step SP9, the state is shifted to the steady-state cooling operation, and the process returns to the control main routine. Thereafter, the control processing is performed by the steady-state cooling operation control by the control main routine. In the steady cooling operation control in the control main routine, control processing is performed so as to perform the operation / stop control of the blower 52 based on the detection value of the temperature detector S3, that is, the temperature of the cooling water sent to the absorber 1. This control process starts the operation of the blower 52 when the detected value of the temperature detector S3 rises to 29 ° C., and starts the blower 52 when the detected value decreases to 26 ° C. Is controlled to stop.

[Second Configuration] The second configuration is based on the first configuration described above.
In addition to the above configuration, a time setting means for setting the first predetermined time T1 and the third predetermined time T3 mainly to a time determined based on the amount of the retained cooling water is provided. In place of the cooling operation shifting means in the above, a steady operation shifting means for shifting to a steady cooling operation after the first predetermined time T1 has elapsed, and a third predetermined time T
After a lapse of 3 seconds, the blower 5
2 forcibly blowing air to a steady state, and then performing a steady cooling operation and then shifting to a steady cooling operation.

More specifically, instead of the control processing flow of FIG. 3 in the first configuration, the control processing flow of FIG. 4 is attached to a [control main routine] for performing a steady operation control. Operation switching subroutine].

[Control Processing Flow in Second Configuration] The operation of each control processing flow will be specifically described below.
The control flow in FIG. 4 is a control flow in which steps SP101 and SP102 are interposed between steps SP8 and SP9 in the control flow of the first configuration in FIG.

It should be noted that, in the second configuration, step SP
The predetermined time T1 in 4 is set to a time mainly determined based on the amount of the retained cooling water. Specifically, for example, at the time of a trial operation after the installation of the apparatus, it is measured in advance and experimentally determined, or the installed pipelines 31
The amount of heat retention in view of the length of 4 and the structure of the heat exchange equipment is set to a time determined by predictive calculation.

Therefore, in this case, steps SP1 to SP1
The description of the part of SP9 is omitted, and step SP1 of FIG.
Only the control processing of the part 01 and step SP102 will be described.

In step SP101, the cooling operation is started while the blower 52 is in the operating state, the start of the predetermined time T4 is set in the timer circuit 84, and the process proceeds to the next step SP102. During the predetermined time T4, the cooling return water 32b sent to the radiating cooling unit 51 in steps SP7 and SP8 has the remaining heat of the radiating cooling unit 51 being heated. Therefore, the remaining heat is radiated to be forcibly cooled. For example, set to about 30 seconds. In this operation state, the operation of the pump P2 is performed by a control process based on a steady cooling operation, but the operation of the blower 52 is controlled so as to continue to operate forcibly regardless of the control process of the steady cooling operation. . Also, a predetermined time period T4
Is set mainly based on the cooling heat capacity of the heat radiation cooling unit 51. This cooling heat capacity is experimentally measured and determined in advance, or the cooling heat capacity is predicted and calculated from design constants of the blower 52, the cooling tank 54, and the like. You can decide.

In step SP102, a predetermined time T4
Is waited until the time elapses, and when the end of time measurement is obtained from the time counting circuit 84, the flow shifts to the next step SP9.

[Modification] The present invention can be modified as follows.

(1) In the first and second configurations, a temperature detector for detecting the outside air temperature near the heat radiating device 50, for example, avoid direct sunlight on the outside of the outer wall or the bottom of the heat radiating device 50. The predetermined time T2 is varied according to the outside air temperature by varying the predetermined time T2 using a numerical value based on the temperature value tp1 detected by the provided temperature detector as a coefficient.

(2) In the second configuration, the radiator 50
A temperature detector that detects the outside air temperature in the vicinity of, for example, a predetermined time T2 as a coefficient based on a numerical value based on a temperature value tp2 detected by a temperature detector provided outside the outer wall or bottom of the heat radiating device 50 to avoid direct sunlight. By varying the predetermined time T4, the predetermined time T2 and the predetermined time T4 are changed in accordance with the outside air temperature.

(3) In the first configuration, the second configuration, (1) and (2), the predetermined time T2 is varied by using a numerical value based on the time value t3 based on the clocking time T0 as a coefficient to obtain a predetermined value. The time T2 is configured to be changed in accordance with the elapsed time from the previous heating operation.

(4) In the above (1) to (3), instead of the coefficients based on the respective values of the temperature value tp1, the temperature value tp2, and the clock time t3, these values, the predetermined time T2, and the predetermined time T4 Is stored in the work memory 83 of the CPU 80 and set, so that control processing can be performed only by selection by table reading instead of calculation each time.

(5) Although not shown in FIG. 1, functional parts indicated by reference numerals shown in FIG. 5 are also provided in the configuration of FIG. In addition, the position of the storage tank 59 is
In a configuration in which the cooling water is higher than 00, an on-off valve is added to an appropriate pipe in order to make the flow of the cooling water normal, and necessary on-off control is given to the on-off valve, so that the cooling water can -It is configured to flow according to the control processing of FIG.

(6) The control processing in FIG. 3 and FIG.
Instead of the control processing by the CPU 80, it is configured by a control with a discrete circuit configuration.

[0061]

According to the present invention, as described above, the first
In the configuration of the above, since the first predetermined time is set to a long time of, for example, about 10 hours, the residual temperature of the cooling water held in the cooling water pipe is reduced to a temperature that does not damage the radiation cooling unit. Therefore, even if the cooling water is circulated in a state where the blower is stopped, the radiator can be operated without any trouble, and before the first predetermined time has elapsed, the blower is first operated. At first, after the second predetermined time has elapsed, the cooling water is sufficiently blasted and cooled by the radiating cooling unit. In the next predetermined time T3, the cooling water is circulated by the pump while radiating and cooling the cooling water with the blower. By the operation of the blower that has been started in advance, the cooling water is gradually cooled down by the heat radiation cooling in the heat radiation cooling unit, and it is possible to safely operate even if it shifts to the cooling operation, Conventional high temperature cold Necessary to carry out the blow work to extract the water is eliminated.

Further, in the second configuration, even after shifting to the cooling operation, the blower is forcibly operated for the fourth predetermined time and the heat radiation cooling part is radiated and cooled. Even if the preheating by the inserted high-temperature cooling water remains in the heat-radiating cooling section, the following cooling operation can be performed efficiently.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention, and FIG. 5 shows a prior art. The contents of each drawing are as follows.

FIG. 1 is a schematic diagram of the overall block configuration.

FIG. 2 is a block diagram of a main part.

FIG. 3 is a control processing flowchart.

FIG. 4 is a control processing flowchart.

FIG. 5 is an overall block diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorber 1A Sprayer 1B Cooling pipe 2a Dilute liquid 2b Intermediate liquid 2c Concentration 3 Pipeline 5 High temperature regenerator 6 Heater 6A Heating regulator 7a Refrigerant vapor 7b Refrigerant vapor 7c Refrigerant vapor 8 Pipeline 9 Heat exchanger 10 Pipeline DESCRIPTION OF SYMBOLS 11 Low-temperature regenerator 11A Heat radiating pipe 11B Passage 12 Pipe 13 Heat exchanger 14 Pipe 21 Pipe 22 Pipe 23 Condenser 23A Cooling pipe 24a Refrigerant liquid 24b Refrigerant liquid 25 Pipe 26 Evaporator 26A Disperser 26B Cooling pipe 27 Pump 28 Pipeline 31 Pipeline 32a Cooling water 32b Cooling return water 33 Pipeline 34 Pipeline 35a Cold / warm return water 35b Cold / hot water 36 Pipeline 37 Pipeline 41 Pipeline 43 Pipeline 50 Heat dissipation device 51 Radiation cooling unit 52 Blower 53 Sprayer 54 Cooling layer 57 Tap water 58 Float valve 59 Reservoir 59A Reservoir 61 Pipe 62 Overflow receiver 63 Pipe 64 Pipe 6 Drainage 66 line 68 a check valve 80 the control unit (CPU) 81 O port 82 processing memory 83 working memory 84 clock circuit 85 display unit 100 absorption chiller P1 Pump P2 Pump P3 Pump V1-off valve V2-off valve V6-off valve

Continuation of the front page (56) References JP-A-5-1188691 (JP, A) JP-A-6-147768 (JP, A) JP-A-5-248723 (JP, A) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 15/00 306

Claims (2)

(57) [Claims] 1. A heat-operated fluid that passes through a heat-exchange pipe in the evaporator by circulating the heat-operated fluid through a required portion of heat-exchange equipment including a condenser, an evaporator, and an absorber. From the heating operation for heating the cooling operation to the cooling operation for cooling the heat operation fluid by the circulation, and cooling for cooling required parts such as the absorber and the condenser only during the cooling operation. An absorption chiller-heater configured to cool a cooling water to be supplied to a water pipe by a radiator cooling unit of a radiator that cools by a blower and circulate by a pump, wherein the cooling operation is performed from a time point when the heating operation ends. When the time up to the start time does not exceed the first predetermined time, first cooling means for sending air to the radiating cooling unit by first setting only the blower to an operating state, and starting operation of the blower. Second A second cooling unit that circulates the cooling water by activating the blower and the pump until a third predetermined time elapses from a time when the predetermined time has elapsed, and after the first predetermined time has elapsed. Or a cooling operation shift means for shifting to the steady cooling operation after the lapse of the third predetermined time. 2. The heat-operated fluid passing through a heat-exchange pipe in the evaporator by circulating the heat-operated fluid through required portions of heat-exchange equipment including a condenser, an evaporator, and an absorber. From the heating operation for heating the cooling operation to the cooling operation for cooling the heat operation fluid by the circulation, and cooling for cooling required parts such as the absorber and the condenser only during the cooling operation. Cooling water passing through the water pipe
An absorption chiller / heater that is cooled by a radiator cooling unit of a radiator that cools by a blower and circulated by a pump, wherein a time from the end of the heating operation to the start of the cooling operation is a first time. When the predetermined time has not elapsed, first cooling means for first operating only the blower to operate and sending wind to the heat radiation cooling unit, and at the time when the second predetermined time has elapsed from the start of operation of the blower And a second cooling unit that circulates the cooling water by operating the blower and the pump until the third predetermined time elapses, and the first predetermined time and the third predetermined time A time setting means for setting a time determined based on an amount of the cooling water held in the cooling water pipe; and a stationary cooling operation transition means for transitioning to a steady cooling operation after the first predetermined time has elapsed. After the third predetermined time has elapsed, the blower is forcibly operated for a fourth predetermined time to perform the steady cooling operation, and then the forced cooling steady operation shifts to the steady cooling operation. And an absorption chiller / heater.