JP3144538B2 - Absorption air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an absorption type air conditioner.

[0002]

2. Description of the Related Art An outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube are sequentially connected in a ring shape, a cooling water circuit for circulating cooling water by a cooling water pump, an indoor heat exchanger, and an evaporator transfer tube. A chilled water circuit in which heat pipes are connected in a loop and a chilled water pump circulates chilled water; a high-temperature regenerator that vaporizes a refrigerant in the low-concentration absorbent by a heating source and separates the refrigerant into a medium-concentration absorbent and a vapor refrigerant; A low-temperature regenerator that includes a regenerator and separates the medium-concentration absorbing liquid into a high-concentration absorbing liquid and a vapor refrigerant, a condenser in which high-temperature vapor refrigerant is sent from each regenerator while the condenser heat transfer tubes are provided. An evaporator for evaporating the liquid refrigerant liquefied in the condenser under reduced pressure; a heat transfer tube provided in the evaporator in parallel with the absorber; and a high concentration of vapor refrigerant evaporated in the evaporator sent from the low-temperature regenerator. An absorber to be absorbed by an absorbing solution; and An absorption air conditioner comprising: an absorption circuit having a solution pump for returning an absorbing solution in a collector to the high-temperature regenerator; and a controller for controlling the cooling water pump, the chilled water pump, the heating source, and the solution pump. Devices are conventionally known.

[0003]

As a result of conducting various tests, the present inventors have found that the above-mentioned conventional absorption type air conditioner has the following problems.

When a long time has elapsed since the last cooling operation and the cooling operation is resumed in a state where the temperature of the high-temperature regenerator (the temperature of the absorbing solution) is lowered, the inside of the high-temperature regenerator becomes substantially vacuum. Therefore, nucleate boiling occurs, and a loud bumping sound (crisp sound) continues for a while. Also, when heating (cooling operation is started) in a state where the temperature of the high-temperature regenerator (temperature of the absorbing solution) is low, a boiling sound is generated until the temperature of the high-temperature regenerator (temperature of the absorbing solution) rises. Followed by

An object of the present invention is to provide an absorption type air conditioner which does not generate bumping noise or loud boiling noise even when the cooling operation is started when the temperature of the high temperature regenerator is low.

[0006]

In order to solve the above problems, the present invention employs the following constitution. (1) An outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube are sequentially connected in a ring shape, and a cooling water circuit for circulating cooling water by a cooling water pump, an indoor heat exchanger, and an evaporator heat transfer tube. A chilled water circuit that is annularly connected and circulates chilled water by a chilled water pump; a high-temperature regenerator that vaporizes a refrigerant in the low-concentration absorbent by a heating source and separates the refrigerant into a medium-concentration absorbent and a vapor refrigerant; , A low-temperature regenerator that separates the medium-concentration absorbing liquid into a high-concentration absorbing liquid and a vapor refrigerant, a condenser in which the condenser heat transfer tubes are provided, and a high-temperature vapor refrigerant is sent from each regenerator, An evaporator for evaporating the liquid refrigerant liquefied in the evaporator under reduced pressure, a high-concentration absorbing liquid sent from the low-temperature regenerator, the evaporator being provided with the absorber heat transfer tube, and the vapor refrigerant evaporated in the evaporator being sent from the low-temperature regenerator Absorber to be absorbed into the inside of the absorber An absorption circuit having a solution pump that returns the absorbent to the high-temperature regenerator, and a bypass pipe connecting an electromagnetic on-off valve that closes during cooling operation and connecting the high-temperature regenerator and the evaporator, An absorption air conditioner comprising: a temperature detection unit that detects a temperature of the high-temperature regenerator; and a controller that controls the cooling water pump, the chilled water pump, the heating source, the solution pump, and the electromagnetic on-off valve. When the start of the cooling operation is instructed when the temperature of the high-temperature regenerator is equal to or lower than the set temperature, the controller executes the bumping prevention operation of opening the electromagnetic on-off valve and rotating the solution pump.

(2) An outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube are sequentially connected in a ring shape, and a cooling water circuit for circulating cooling water by a cooling water pump;
A chilled water circuit in which evaporator heat transfer tubes are connected in a ring, and chilled water is circulated by a chilled water pump. A low-temperature regenerator including the high-temperature regenerator and separating the medium-concentration absorbent into a high-concentration absorbent and a vapor refrigerant,
A condenser in which the condenser heat transfer tubes are provided and into which high-temperature vapor refrigerant is fed from each regenerator; an evaporator for evaporating the liquid refrigerant liquefied in the condenser under reduced pressure; and an absorber provided in conjunction with the evaporator. An absorber that disposes a heat transfer tube and absorbs the vapor refrigerant evaporated by the evaporator into a high-concentration absorbent sent from the low-temperature regenerator; and a solution pump that returns the absorbent in the absorber to the high-temperature regenerator. An absorption air conditioner comprising: an absorption circuit having: a temperature detection unit that detects a temperature of the high-temperature regenerator; and a controller that controls the cooling water pump, the cold water pump, the heating source, and the solution pump. ,
When the start of the cooling operation is instructed when the temperature of the high-temperature regenerator is equal to or lower than the first set temperature, the controller performs a boiling sound suppressing operation for operating the heating source with a small capacity, and When the temperature rises above the second set temperature, a turbo operation for operating the heating source with a large capacity is performed.

[0008]

[Action]

[Operation common to claims 1 and 2 during cooling operation] The high-temperature regenerator is heated by a heating source, and the low-concentration absorbent is vaporized by the refrigerant and separated into a medium-concentration absorbent and a vapor refrigerant. The low-temperature regenerator separates the medium-concentration absorbent into a high-concentration absorbent and a vapor refrigerant. The vapor refrigerant is sent from each regenerator to the condenser. The vapor refrigerant is condensed by the cooling water flowing through the condenser heat transfer tube and accumulates in the condenser.

The liquid refrigerant sent from the condenser to the evaporator strikes the evaporator heat transfer tube through which the cold water flows, evaporates and cools the cold water. Indoor cooling is performed by the cooled cold water passing through the indoor heat exchanger. The vapor refrigerant evaporated in the evaporator is absorbed by the high-concentration absorbent sent from the low-temperature regenerator and accumulates in the absorber. The liquid refrigerant accumulated in the absorber is returned to the high temperature regenerator by the solution pump.

When the temperature of the high-temperature regenerator is high and exceeds the set temperature, if the start of the cooling operation is instructed, the possibility of nucleate boiling is extremely small. The cooling operation is performed without performing. When the start of the cooling operation is instructed when the temperature of the high-temperature regenerator is low and is equal to or lower than the set temperature, the controller executes the bumping prevention operation of opening the electromagnetic on-off valve and rotating the solution pump.

When the solution pump is rotated, the absorption liquid in the high-temperature regenerator flows, so that nucleate boiling does not occur. The reason for opening the solenoid on-off valve is to prevent the absorption liquid from accumulating in the low-temperature regenerator and transfer the absorption liquid to the high-temperature regenerator → bypass pipe (electromagnetic on-off valve) → evaporator → absorber → solution pump → This is to raise the temperature while circulating with the high-temperature regenerator.

In the case where the temperature of the high-temperature regenerator is high and exceeds the first set temperature, the boiling sound is small even when the heating source is operated, so that the controller performs the boiling sound suppressing operation. Without cooling operation. The temperature of the high-temperature regenerator is low,
When the start of the cooling operation is instructed when the temperature is equal to or lower than the first set temperature, the controller performs the boiling sound suppressing operation of operating the heating source with a small capacity. When the temperature of the high-temperature regenerator rises above the second set temperature, the controller performs a turbo operation for operating the heating source with a large capacity.

[0013]

【The invention's effect】

[Claim 1] By flowing the absorbing liquid, bumping (nuclear boiling) can be prevented, and the cooling operation can be performed with low noise. If not much time has passed since the last cooling operation and the temperature of the high-temperature regenerator is high, the cooling operation can be performed immediately.

When the temperature of the high-temperature regenerator is low, the controller operates the heating source with a small capacity, so that the boiling noise can be reduced. Since the turbo operation is performed after the boiling sound suppressing operation, the start-up time until the cooling capacity is obtained does not become long.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment (corresponding to claim 1) of the present invention will be described with reference to FIGS. As shown in the figure, a domestic absorption type air conditioning system A includes a cooling water circuit 1 for circulating cooling water 10 during cooling operation, a cooling and heating water circuit 2 for circulating cooling and heating water 20, a high temperature regenerator 3, and a low temperature regeneration. Vessel 4,
Condenser 5, evaporator 6, absorber 7, and solution pump 802
Liquid circuit 8 having a controller 9 and a temperature sensor 9
1, 92, and 93.

The cooling water circuit 1 includes a cooling tower 12 provided with a cooling tower fan 11, a cooling water tank 13, and a cooling water pump 14.
, An absorber heat transfer tube 15 and a condenser heat transfer tube 16 are sequentially connected in a ring shape. During cooling operation (see FIG. 3), the cooling water pump 14 (1230 liter / h) is operated to cool the cooling water. Circulate 10 The cooling tower fan 11 includes an AC condenser motor 111 (100 V, power consumption 80 W, 8 μm).
F, 1200 rpm / 60 Hz).

The AC condenser motor 111 is electrically connected to AC-100V through a triac (trademark),
The temperature of the cooling water 10 detected by the temperature sensor 93 is 31.5
The temperature is controlled by the controller 9 so as to maintain the temperature. The temperature sensor 93 is connected to the cooling water pump 14 and the heat transfer tube 15 of the absorber.
The temperature of the cooling water 10, which is provided in the cooling water pipe 101 connecting between the pipes and is supplied to the absorber heat transfer pipe 15, is detected. During the heating operation (see FIG. 4), all of the cooling water 10 in the cooling water circuit 1 is drained, and the AC condenser motor 111 is not energized.

The chilled / hot water circuit 2 includes an indoor heat exchanger 21 provided with a blower fan 211 (a plurality of units can be connected in parallel), a cistern 22, a chilled / hot water pump 801 (at a maximum capacity of 620 liter / h), and an evaporator heat transfer tube. 37 is connected in a ring,
The cold / hot water 20 is circulated by a cold / hot water pump 801. The amount of heat absorbed by the indoor heat exchanger 21 during the cooling operation is 43
40 kcal (at the maximum capacity), and the heat radiation amount of the indoor heat exchanger 21 during the heating operation is 6,200 kcal (at the maximum capacity).

The high-temperature regenerator 3 includes a dome-shaped heating chamber 32 heated by a gas burner 31, a blowing cylinder 321 standing upright, and a refrigerant in a dilute liquid 33 (58% aqueous lithium bromide in this embodiment). (Water) is evaporated and the middle liquid 34 (60
% Lithium bromide aqueous solution) and a vapor refrigerant 35. In addition, in the heating chamber 32,
A temperature sensor 91 for measuring the temperature of the high temperature regenerator 3 (the temperature of the diluted liquid 33) is provided.

The gas burner 31 is of a Bunsen type. Gas is supplied by a gas pipe 314 having gas solenoid valves 311 and 312 and a gas proportional valve 313 connected thereto.
5 supplies combustion air and burns.

During the cooling operation, the gas burner 31 burns with the following input amount. Small combustion: 3500 kcal Medium combustion: 4800 kcal Large combustion: 6500 kcal Proportional control: 1500 kcal to 4800 kcal (The temperature of the cold / hot water 20 supplied to the indoor heat exchanger 21 is 7
(The input amount is controlled proportionally by the controller 9 so that the temperature becomes ° C.)

During the cooling operation, since the cooling / heating switching valve 36 is closed, the middle liquid 34 (165 ° C.)
1 → high-temperature heat exchange flow path 342 → supplied to the upper part of low-temperature regenerator 4 via middle liquid pipe 344 with orifice 343.

The low-temperature regenerator 4 includes the high-temperature regenerator 3,
During the cooling operation, the middle liquid 3 sent from the high temperature regenerator 3
4 is separated into a concentrated liquid 41 (62% aqueous solution of lithium bromide) and a vapor refrigerant 42. During the heating operation, the middle liquid 34 is not sent to the low-temperature regenerator 4.

The condenser 5 has an orifice 5 during heating operation.
The high-temperature vapor refrigerant 35 is sent from the high-temperature regenerator 3 through the vapor refrigerant pipe 51 provided with 11, but does not condense because the cooling water 10 does not flow in the condenser heat transfer tube 16.

During the cooling operation, steam refrigerants 35 and 42 are sent from the high-temperature regenerator 3 and the low-temperature regenerator 4 to the condenser 5, and the vapor refrigerants 35 and 42 are cooled by the cooling water 10 flowing through the coil-shaped condenser heat transfer tubes 16. Cooled and liquefied, liquid refrigerant (water)
52 accumulates at the bottom of the condenser 5. In addition, temperature rise (37.5)
The cooling water 10 cooled in the cooling tower 12 (31.5 ° C.).
° C).

The evaporator 6 is provided with a coil-shaped (with groove) evaporator heat transfer tube 37. Since the cooling / heating switching valve 36 is opened during the heating operation, the high-temperature medium liquid 34 is sent to the evaporator 6 through the middle liquid pipe 341 (the cooling / heating switching valve 36) → the heating pipe 361. At the same time, the high-temperature vapor refrigerant 42 is sent from the condenser 5 through the refrigerant pipe 53 (refrigerant valve 54).

When the refrigerant valve 54 is opened during the cooling operation, the liquid refrigerant 52 is supplied to the refrigerant pipe 53 (refrigerant valve 54) → the sprayer 55.
And the inside of the evaporator 6 is substantially vacuum (approximately 6.5 mmHg). Therefore, the liquid refrigerant 52 takes vaporization heat from the cold and hot water 20 flowing through the evaporator heat transfer tube 37. Evaporate. Then, the cooled cold / hot water 20 exchanges heat with the air blown into the room (at maximum capacity, heat absorption 4340 kcal / h) in the indoor heat exchanger 21 placed in the room to raise the temperature. 20 is again cooled by passing through the evaporator heat transfer tube 37.

The absorber 7 provided with the absorber heat transfer tube 15 is
The upper part is connected to the evaporator 6. Then, during the cooling operation, the vapor refrigerant 61 evaporated by the evaporator 6 enters the absorber 7 from above or the like, and the low-temperature regenerator 4 → the concentrated liquid pipe 411 → the low-temperature heat exchange channel 412 → the concentrated liquid pipe 413 → dispersed. The diluted liquid 33 which has been absorbed by the concentrated liquid 41 scattered on the absorber heat transfer tube 15 via the vessel 70 and has become a low concentration accumulates at the bottom of the absorber 7. During the heating operation, a high-temperature refrigerant is sent from the evaporator 6.

The solution pump 802 is a three-phase DC brushless motor (rated output 200 W,
Power consumption 250 W). A Hall element 800 is attached to the solution pump 802, and is feedback-controlled by the controller 9. Since the flow control of the cold / hot water 20 may be broad, the cold / hot water pump 801 and the solution pump 802 may be constituted by one tandem pump.

The diluted liquid 33 (absorbed liquid during the heating operation) accumulated at the bottom of the absorber 6 is diluted with a diluted liquid pipe 71 → a solution pump 802.
(Maximum flow rate 100 liter / h) → dilute liquid pipe 72 → low temperature heat exchange channel 73 → high temperature heat exchange channel 74 → sent to heating chamber 32 of high temperature regenerator 3 via dilute liquid pipe 75.

The controller 9 controls the following based on signals from operation switches (not shown), signals from various sensors including the temperature sensors 91, 92 and 93, and the like. Gas solenoid valves 311, 312, gas proportional valve 313, cold / hot water pump 801, solution pump 802, AC condenser motor 1
11, refrigerant valve 54, cooling / heating switching valve 36, cooling water pump 1
4, the blower fan 211.

Next, the operation of the absorption type air conditioner A by the microcomputer (not shown) of the controller 9 when the cooling operation is restarted will be described with reference to FIG. When a cooling operation switch (not shown) is turned on, in step s1,
Based on the output of the temperature sensor 91, it is determined whether or not the temperature of the high-temperature regenerator 3 (the temperature of the diluted liquid 33) is equal to or lower than 50 ° C. (first set temperature). Proceed to s2, and if it exceeds 50 ° C. (NO), proceed to step s14.

In step s2, a cooling tower water supply process (CT water supply) for storing water in the cooling water tank 13 is performed, and after completion, the flow proceeds to step s3.

At step s3, the cooling / heating switching valve 36 is opened,
The bumping prevention operation of rotating the solution pump 802 at a low speed of 2400 rpm is started, and the process proceeds to step s4. By this bumping prevention operation, the dilute liquid 33 in the high-temperature regenerator 3 flows and nucleate boiling can be prevented. By opening the cooling / heating switching valve 36,
The absorption liquid does not enter the low-temperature regenerator 4 and the high-temperature regenerator 3 → heating pipe 361 (cooling / heating switching valve 36) → evaporator 6 → absorber 7 →
The temperature of the absorbing solution can be raised while circulating from the solution pump 802 to the high temperature regenerator 3.

In step s4, an ignition operation is performed, and in step s5, the gas burner 31 is ignited to start combustion. In step s6, the input is a small capacity of 3500 kca
The opening degree of the gas proportional valve 313 is determined so as to be 1, and the process proceeds to step s7.

In step s7, based on the output of the temperature sensor 91, the temperature of the high-temperature regenerator 3 (the temperature of the diluted liquid 33)
Is higher than or equal to 60 ° C. (second set temperature)
If the temperature is equal to or higher than 60 ° C. (YES), the process proceeds to step s8,
If the temperature is lower than 0 ° C. (NO), the process returns to step s6, where 35
Continue burning with a 00 kcal input.

In step s8, the cooling / heating switching valve 36 is closed, and the flow advances to step s9. In step s9, rotation speed control of the solution pump 802 is started so that the solution pump 802 rotates at a rotation speed corresponding to the temperature of the high temperature regenerator 3 (the temperature of the diluted liquid 33), and the process proceeds to step s10.

In step s10, the temperature sensor 9
1 and 92, the temperature of the high-temperature regenerator 3 (dilute solution 3
3) is raised to 150 ° C. or higher, or the temperature of the cold / hot water 20 is lowered to 11 ° C. or lower. If any of the conditions is satisfied (YES), the process proceeds to step s11. If none of them is satisfied (NO), step s
Return to 9.

In step s11, the input is 4800
The opening degree of the gas proportional valve 313 is determined so as to be kcal, and the process proceeds to step s12. In step s12,
Based on the output of the temperature sensor 92, the temperature of the cold / hot water 20 becomes 1
It is determined whether the temperature is 0 ° C. or less.
ES) proceeds to step s13, and if not (N)
O) returns to step s11 to continue the combustion with the input of 4800 kcal.

In step s13, the temperature sensor 92
Cold / hot water 2 supplied to the indoor heat exchanger 21 based on the output of
The degree of opening of the gas proportional valve 313 is determined so that the temperature of 0 becomes 7 ° C., and the input amount is set to 1500 kcal to 4800 kc.
Perform proportional control in the range of al.

In step s14, a cooling tower water supply process (CT water supply) for storing water in the cooling water tank 13 is performed, and after completion, the flow proceeds to step s15. In step s15, an ignition operation is performed, and in step s16, the gas burner 31 is ignited to start combustion.

In step s17, the input is 4800
The opening degree of the gas proportional valve 313 is determined so as to be kcal, and the process proceeds to step s18.

In step s18, when the temperature of the high-temperature regenerator 3 (temperature of the dilute liquid 33) reaches 80 ° C., the solution pump 802 is rotated at a rotation speed corresponding to the temperature of the high-temperature regenerator 3 (temperature of the dilute liquid 33). The rotation speed control of the solution pump 802 is started so as to rotate, and the process proceeds to step s19. Steps
At 19, it is determined whether the temperature of the cold / hot water 20 is lower than or equal to 10 ° C. based on the output of the temperature sensor 92. If yes (YES), proceed to step s20; if not (NO), go to step s20. Returning to s17, 480
Continue combustion with 0 kcal input.

In step s20, the temperature sensor 92
Cold / hot water 2 supplied to the indoor heat exchanger 21 based on the output of
The degree of opening of the gas proportional valve 313 is determined so that the temperature of 0 becomes 7 ° C., and the input amount is set to 1500 kcal to 4800 kc.
Perform proportional control in the range of al.

Next, advantages of this embodiment will be described. [A] The temperature of the high-temperature regenerator 3 (the temperature of the diluted liquid 33) is 50 ° C.
In the following cases, the cooling / heating switching valve 36 is kept open until the temperature of the high-temperature regenerator 3 reaches 60 ° C.
Is configured to perform a bumping prevention operation (Step s3 to Step s8) in which is rotated at a low speed at 2400 rpm. As a result, the absorbing liquid does not accumulate in the low-temperature regenerator 4 and the high-temperature regenerator 3
→ Heating pipe 361 (cooling / heating switching valve 36) → Evaporator 6 → Absorber 7 → Solution pump 802 → High temperature regenerator 3 The temperature rises while circulating and flows, so that nucleate boiling (bump boiling) can be prevented. Therefore, the home-use absorption cooling and heating apparatus A can perform the cooling operation with low noise.

[B] If not much time has passed since the previous cooling operation and the temperature of the high-temperature regenerator 3 exceeds 50 ° C. (there is no risk of nucleate boiling), the bumping prevention operation is not performed, so the cooling operation is performed. Be done promptly and be reasonable.

Next, a second embodiment (corresponding to claim 2) of the present invention will be described with reference to FIGS. The absorption type air conditioner B of this embodiment has the same mechanical configuration as the absorption type air conditioner A, but the operation when the cooling operation is restarted is different as described below. When restarting the cooling operation, the microcomputer (not shown) of the controller 9
It operates as shown in the flowchart of FIG.

When a cooling operation switch (not shown) is turned on, in step S1, based on the output of the temperature sensor 91,
The temperature of the high-temperature regenerator 3 (the temperature of the diluted liquid 33) is 50 ° C. (first temperature).
It is determined whether the temperature is equal to or lower than (set temperature). If the temperature is lower than 50 ° C. (YES), the process proceeds to step S2. If the temperature exceeds 50 ° C. (NO), the process proceeds to step S15.

In step S2, a cooling tower water supply process (CT water supply) for storing water in the cooling water tank 13 is performed, and after completion, the flow proceeds to step S3.

In step S3, the cooling / heating switching valve 36 is opened,
A liquid level adjustment operation of rotating the solution pump 802 at a low speed of 2400 rpm is performed for 10 seconds, and the process proceeds to step S4. By this liquid level adjustment operation, the absorbing liquid is discharged from the blow-out cylinder 321 → the middle liquid pipe 341 (cooling / heating switching valve) → the heating pipe 361 → the evaporator 6
Since the circulation is performed in the order of → the absorber 7 → the solution pump 802 → the high-temperature regenerator 3, the liquid level of the absorption liquid in the separation cylinder 322 and the absorption liquid in the blowing cylinder 321 is adjusted.

Pre-purge is performed for 10 seconds in step S4, ignition operation is performed in step S5, and gas burner 31 is ignited in step S6 to start combustion. Step S7
Then, the opening of the gas proportional valve 313 is determined so that the input becomes 3500 kcal, and the process proceeds to step S8.

In step S8, based on the output of the temperature sensor 91, the temperature of the high-temperature regenerator 3 (the temperature of the dilute liquid 33)
Is higher than or equal to 60 ° C. (second set temperature)
If the temperature is equal to or higher than 60 ° C. (YES), the process proceeds to step S9,
If the temperature is lower than 0 ° C. (NO), the process returns to step S7, where 35
Continue burning with a 00 kcal input.

At step S9, the input is 6500k
The opening degree of the gas proportional valve 313 is determined so as to be cal.
Proceed to step S10. In step S10, when the temperature of the high-temperature regenerator 3 (the temperature of the diluted liquid 33) becomes 80 ° C. or higher, the solution pump 802 rotates at a rotation speed corresponding to the temperature of the high-temperature regenerator 3 (the temperature of the diluted liquid 33). Then, the rotation speed control of the solution pump 802 is started, and the process proceeds to step S11.

In step S11, the temperature sensor 9
1 and 92, the temperature of the high-temperature regenerator 3 (dilute solution 3
3) is raised to 150 ° C. or higher, or the temperature of the cold / hot water 20 is lowered to 11 ° C. or lower. If any of the conditions is satisfied (YES), the process proceeds to step S12. If none of them is satisfied (NO), step S
Return to 9.

In step S12, the input is 4800
The opening of the gas proportional valve 313 is determined so as to be kcal, and the process proceeds to step S13. In step S13,
Based on the output of the temperature sensor 92, the temperature of the cold / hot water 20 becomes 1
It is determined whether the temperature is 0 ° C. or less.
ES) proceeds to step S14, and if not (N
O) returns to step S12 to continue the combustion with the input of 4800 kcal.

In step S14, the temperature sensor 92
Cold / hot water 2 supplied to the indoor heat exchanger 21 based on the output of
The degree of opening of the gas proportional valve 313 is determined so that the temperature of 0 becomes 7 ° C., and the input amount is set to 1500 kcal to 4800 kc.
Perform proportional control in the range of al.

In step S15, a cooling tower water supply process (CT water supply) for storing water in the cooling water tank 13 is performed, and after completion, the flow proceeds to step S16. Pre-purge is performed for 10 seconds in step S16, an ignition operation is performed in step S17, and the gas burner 31 is ignited in step S18 to start combustion. In the step S19, the input is 4800k.
The opening degree of the gas proportional valve 313 is determined so as to be cal.
Proceed to step S20.

In step S20, when the temperature of the high-temperature regenerator 3 (the temperature of the dilute liquid 33) becomes 80 ° C. or higher, the solution pump 802 is rotated at a rotation speed corresponding to the temperature of the high-temperature regenerator 3 (the temperature of the dilute liquid 33). The rotation speed control of the solution pump 802 is started so as to rotate, and the process proceeds to step S21.

In step S21, the temperature sensor 92
It is determined whether the temperature of the cold / hot water 20 is lower than or equal to 10 ° C. based on the output. If yes (YES), the process proceeds to step S22. If not (NO), the process returns to step S19 and returns to 4800 kcal. Continue burning with the input of.

In step S22, the temperature sensor 92
Cold / hot water 2 supplied to the indoor heat exchanger 21 based on the output of
The degree of opening of the gas proportional valve 313 is determined so that the temperature of 0 becomes 7 ° C., and the input amount is set to 1500 kcal to 4800 kc.
Perform proportional control in the range of al.

Next, the advantages of this embodiment will be described. [C] The temperature of the high-temperature regenerator 3 (the temperature of the diluted liquid 33) is low,
When the temperature is 50 ° C. or lower, the boiling noise suppressing operation for burning the gas burner 31 with a low input (3500 kcal) is performed after the liquid level adjustment operation is completed, so that the boiling noise can be reduced.

[D] The delay in the start-up time due to the execution of the boiling noise suppressing operation is caused by the turbo operation of burning the gas burner 31 at a high input (6500 kcal) after the boiling noise suppressing operation in step S9, and thus the cooling capacity is increased. The start-up time before the appearance is not significantly longer.

In the above embodiment, a gas burner is used as a heating source, but another heat source, for example, an electric heater may be used.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of an absorption type air conditioner according to first and second embodiments of the present invention.

FIG. 2 is a system diagram of the absorption type cooling and heating device.

FIG. 3 is an operation explanatory diagram when the absorption type cooling and heating apparatus is operated for cooling.

FIG. 4 is an operation explanatory diagram when the absorption type cooling / heating device is operated for heating.

FIG. 5 is a flowchart showing the operation of the controller when the cooling operation is restarted in the absorption type cooling and heating apparatus according to the first embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the controller when the cooling operation is restarted in the absorption-type cooling and heating apparatus according to the second embodiment of the present invention.

[Explanation of symbols]

 A, B Absorption air conditioner (absorption air conditioner) 1 Cooling water circuit 2 Cold and hot water circuit (cold water circuit) 3 High temperature regenerator 4 Low temperature regenerator 5 Condenser 6 Evaporator 7 Absorber 8 Absorber circuit (absorption circuit) Reference Signs List 9 Controller 10 Cooling water 12 Cooling tower (outdoor heat exchanger) 14 Cooling water pump 15 Absorber heat transfer tube 16 Condenser heat transfer tube 20 Cold / hot water (cold water) 21 Indoor heat exchanger 31 Gas burner (heating source) 33 Rare liquid ( Low-concentration absorbing liquid) 34 Medium liquid (medium-concentration absorbing liquid) 35 Vapor refrigerant 36 Cooling / heating switching valve (electromagnetic on-off valve) 37 Evaporator heat transfer tube 41 Rich liquid (high-concentration absorbing liquid) 42 Vapor refrigerant 52 Liquid refrigerant 61 Vapor refrigerant 91 Temperature sensor (temperature detecting means) 361 Heating pipe (bypass pipe) 801 Cold / hot water pump (cold water pump) 802 Solution pump

──────────────────────────────────────────────────続 き Continued on the front page (72) Katsuhito Ikeda 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya Linnai Co., Ltd. (72) Yasunari Furukawa 4-1-2, Hirano-cho, Chuo-ku, Osaka Large Inside Osaka Gas Co., Ltd. (72) Inventor Toru Fukuchi 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi Inside Osaka Gas Co., Ltd. (56) References JP-A-6-174326 (JP, A) JP-A-4 JP-A-9-126581 (JP, A) JP-A-55-133175 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 15/00 306

Claims (2)

(57) [Claims] 1. A cooling water circuit in which an outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube are sequentially connected in a loop, and a cooling water circuit for circulating cooling water by a cooling water pump; an indoor heat exchanger; A chilled water circuit in which heat pipes are connected in a loop, and chilled water is circulated by a chilled water pump; A low-temperature regenerator that includes a regenerator and separates the medium-concentration absorbing liquid into a high-concentration absorbing liquid and a vapor refrigerant, a condenser in which high-temperature vapor refrigerant is sent from each regenerator while the condenser heat transfer tubes are provided. An evaporator for evaporating the liquid refrigerant liquefied in the condenser under reduced pressure; a heat transfer tube provided in the evaporator in parallel with the absorber; and a high concentration of vapor refrigerant evaporated in the evaporator sent from the low-temperature regenerator. An absorber to be absorbed by an absorbing solution; and An absorption circuit having a solution pump for returning the absorbent in the collector to the high-temperature regenerator, and an electromagnetic on-off valve that closes during the cooling operation are provided on the way, and connect the high-temperature regenerator and the evaporator. A bypass pipe; a temperature detecting means for detecting a temperature of the high-temperature regenerator; and a controller for controlling the cooling water pump, the cold water pump, the heating source, the solution pump, and the electromagnetic on-off valve. In the air conditioner, when the cooling operation start is instructed when the temperature of the high-temperature regenerator is equal to or lower than a set temperature, the controller performs a bumping prevention operation of opening the electromagnetic on-off valve and rotating the solution pump. Absorption type air conditioner characterized by what to implement. 2. A cooling water circuit in which an outdoor heat exchanger, an absorber heat transfer tube, and a condenser heat transfer tube are sequentially connected in a ring shape, and a cooling water circuit for circulating cooling water by a cooling water pump, an indoor heat exchanger, and an evaporator transfer tube. A chilled water circuit in which heat pipes are connected in a loop, and chilled water is circulated by a chilled water pump; A low-temperature regenerator that includes a regenerator and separates the medium-concentration absorbing liquid into a high-concentration absorbing liquid and a vapor refrigerant, a condenser in which high-temperature vapor refrigerant is sent from each regenerator while the condenser heat transfer tubes are provided. An evaporator for evaporating the liquid refrigerant liquefied in the condenser under reduced pressure; a heat transfer tube provided in the evaporator in parallel with the absorber; and a high concentration of vapor refrigerant evaporated in the evaporator sent from the low-temperature regenerator. An absorber to be absorbed by an absorbing solution; and An absorption circuit having a solution pump for returning the absorbent in the collector to the high-temperature regenerator; a temperature detection unit for detecting the temperature of the high-temperature regenerator; the cooling water pump, the chilled water pump, the heating source, and A controller for controlling the solution pump, wherein when the cooling operation is instructed when the temperature of the high-temperature regenerator is equal to or lower than a first set temperature, the controller operates with a small capacity. An absorption type air conditioner, wherein a boiling sound suppressing operation for operating a heating source is performed, and a turbo operation for operating the heating source with a large capacity is performed when the temperature of the high-temperature regenerator rises to a second set temperature or higher. apparatus.