KR100234681B1 - Operation control method of absorption type cooler - Google Patents

Abstract

[assignment]

(EN) Provided is an absorption type air conditioner which does not cause overheating of an absorbing liquid at the start of a hot state, and can shorten a start time (time until the cooling / heating capability is exerted) at the start in the cold state.

[Solution]

The cooling operation is started at a large amount of gas supply (step s4; 8000 kcal / h) when a long time elapses from the first operation or the last operation stop and the temperature of the high temperature regenerator is low (NO at step s2; (Step S9; for example, 2500 kcal / h (for example, 2500 kcal / h) when the temperature of the high temperature regenerator is high The cooling operation is started.

Description

Operation control method of absorption type air conditioner

FIG. 1 is an explanatory view of the principle of an absorption type air conditioning apparatus according to an embodiment to which the method of the present invention is applied.

FIG. 2 is a system diagram of the absorption type air conditioner. FIG.

Fig. 3 is an explanatory view of the operation in the case where the absorption type air conditioner is operated in cooling mode;

FIG. 4 is a flowchart showing the operation of the absorption type air conditioner at the time of cooling operation.

FIG. 5 is an explanatory view of the operation in the case where the absorption type air conditioning apparatus is heated.

FIG. 6 is a flowchart showing the operation of the absorption type air conditioning apparatus during heating operation.

FIG. 7 is a flowchart showing the operation of the conventional absorption type air conditioner during cooling operation.

Description of the Related Art

A - absorption type air conditioning system 1 - cooling water circuit

2 - Cold / hot water circuit 3 - High temperature regenerator

4 - Low temperature regenerator 5 - Condenser

6 - Evaporator 7 - Absorber

8 - Absorbent circuit 9 - Controller

10 - Cooling water 11 - Cooling tower (outdoor heat exchanger)

13 - cooling water pump 14 - absorber heat pipe

15 - Condenser heat transfer pipe 20 - Hot and cold water

21 - Indoor Heat Exchanger 24 - Evaporator Heat Transfer Tube

30 - Low concentration absorbent 31 - Boiling (heating part)

34 - Medium concentration absorbed 35,42 - Steam refrigerant

41 - High concentration absorbent liquid 211 - Ventilation fan

311 - Gas burner (heating source) 801 - Solution pump part (solution pump)

802 - Cold and hot water pump section (cold / hot water pump)

[Technical Field]

The present invention relates to an operation control method of an absorption type air conditioner using an absorption liquid.

[0003]

An outdoor heat exchanger having an outdoor fan, an absorber heat transfer pipe and a condenser heat transfer pipe in the form of an annulus, and circulating cooling water by a cooling water pump during cooling operation; A cold / hot water circuit which circulates the indoor heat exchanger and the evaporator heat pipe provided with the blowing fan and circulates cold / hot water by the cold / hot water pump; Wherein the heating unit containing the absorbing liquid is heated by a gas burner, and a high-temperature sintering unit for vaporizing the refrigerant in the low-concentration absorbing liquid and separating the absorbing liquid into the vapor-absorbing liquid and the vapor refrigerant during the cooling operation, Temperature condenser for separating the high-temperature absorbing liquid and the vapor refrigerant into high-concentration absorbing liquid and vapor refrigerant, a condenser in which the high-temperature vapor refrigerant is fed from each regenerator in the cooling fingering, a high-temperature absorbing liquid is fed from the high- The evaporator for evaporating the liquefied refrigerant liquefied in the condenser at the time of operation, the absorber heat transfer pipe installed in parallel with the booster erector, and the vapor refrigerant vaporized in the evaporator during the cooling operation is absorbed by the high- The absorption liquid in the absorber and the absorber Absorbing liquid circuit provided with a solution pump to return to the group and the high-temperature regenerator; During the heating operation, the gas supply amount of the gas burner is proportionally controlled (for example, 1500 kcal / h to 8000 kcal / h) so that the temperature of the cold / hot water supplied to the indoor heat exchanger is maintained at a predetermined temperature (For example, 1500 kcal / h to 4800 kcal / h) so that the temperature of the cold / hot water supplied to the indoor heat exchanger is maintained at a predetermined temperature (for example, 7 ° C) And an air conditioning apparatus that does not use Freon, which blows cold air or warm air to the room by the blowing fan to cool and heat the room, has recently attracted attention (see FIG. 7).

In the absorption type air conditioner, since the temperature of constituent parts such as the flame portion of the gas burner is low and the combustion air is easily flowed at the start of operation, when the proportional control is performed as in normal combustion, the air- And combustion becomes unstable. Although the proportional control is controlled in accordance with the cold / hot water temperature, since the temperature of the cold / hot water at the start of operation does not correspond to the temperature of the absorption liquid, there is a possibility that the absorption liquid in the high temperature regenerator is overheated.

Therefore, it is conceivable to fix the gas supply amount of the gas burner at the start of operation to a midpoint (for example, 4000 kcal) of the combustion capability range separately from the proportional control at the time of normal combustion until the operation becomes stable.

[PROBLEMS TO BE SOLVED BY THE INVENTION]

As a result of various experiments by the present inventors, it has been found that the above-mentioned absorption type air conditioning apparatus has the following problems.

(1) A long time has elapsed at the time of the first operation or the operation stop and the absorption liquid in the high temperature regenerator starts to cool (hereinafter referred to as a cold state), and the cooling / .

(2) When the absorbing liquid in the high temperature regenerator starts to be in a hot state (hereinafter referred to as a hot state) since a time has not elapsed since the operation stop such as cooling OFF, heating OFF, The temperature (HGE temperature) rises too much and it is easy to stop the high temperature error.

[Cooling OFF, heating OFF, heating OFF] and [cooling OFF start, heating OFF start, heating OFF start] are not repeated to the cooling proportional control.

SUMMARY OF THE INVENTION An object of the present invention is to provide an absorption type air conditioner capable of shortening a start time (time until cooling / heating capability is exerted) when starting from a cold state, And a method of controlling the operation of the apparatus.

[MEANS FOR SOLVING THE PROBLEMS]

In order to solve the above problems, the present invention adopts the following configuration.

(1) a cooling water circuit which is connected in an annular fashion to the outdoor heat exchanger, the absorber heat transfer pipe and the condenser heat transfer pipe in order, and circulates the cooling water by the cooling water pump during cooling operation; A cold / hot water circuit for circulating the cold / hot water through a cold / hot water pump, the cold / hot water circuit being connected in an annular shape to an indoor heat exchanger and an evaporator heat pipe provided with a blowing fan; A condenser in which the condenser heat transfer tube is installed and in which the high temperature vapor refrigerant is fed from the regenerator, a high-temperature absorbing liquid is fed during the heating operation, and a high- An absorber provided in parallel with the evaporator and adapted to absorb the vapor refrigerant vaporized in the evaporator in a high-concentration absorber to be supplied from the regenerator, and an absorber An absorber circuit having a solution pump returning to said regenerator; And a controller for controlling the heating power of the heating source so that the cold / hot water is maintained at a predetermined temperature, wherein the cooling / heating air is blown to the room by the blowing fan to cool / When the operation is started in a state where the temperature of the absorption liquid in the regenerator is low, the heating power of the heating source is fixed to a high level until the operation is stabilized, and when the operation is started in a high temperature state, The heating power of the heating source is fixed to a small value.

(2) a cooling water circuit which is annularly connected in turn to the outdoor heat exchanger, the absorber heat transfer pipe and the condenser heat transfer pipe, and circulates the cooling water by the cooling water pump during cooling operation; A cold / hot water circuit for circulating the cold / hot water through a cold / hot water pump, the cold / hot water circuit being connected in an annular shape to an indoor heat exchanger and an evaporator heat pipe provided with a blowing fan; A high temperature regenerator which heats the heating part containing the absorbing liquid by a heating source and separates the refrigerant in the low concentration absorbing liquid into a medium density absorbing liquid and a vapor refrigerant in the cooling operation mode and surrounds the high temperature regenerator, A low-temperature regenerator for separating the high-temperature absorbing liquid and the vapor refrigerant, a condenser in which the condenser heat transfer tube is installed, the high-temperature vapor refrigerant is fed from each regenerator during the cooling operation, the high-temperature absorber is fed from the high temperature regenerator during the heating operation, An absorber installed in parallel with the evaporator and equipped with the absorber heat transfer pipe and absorbing the vapor refrigerant evaporated in the evaporator in the high-concentration absorber sent from the low-temperature regenerator during the cooling operation, and an evaporator for evaporating the evaporated liquefied refrigerant from the evaporator, The absorption liquid in the absorber An absorber circuit having a solution pump for returning to an on regenerator; And a controller for controlling the heating power of the heating source so that the cold / hot water is maintained at a predetermined temperature, wherein the cooling / heating air is blown to the room by the blowing fan to cool / When the operation is started in a state where the temperature of the absorbing liquid in the regenerator is low, the heating power of the heating source is largely fixed until the operation is stabilized. When the operation is started in a high temperature state, The heating power of the heating source is fixed to a small value.

[Action]

[Claim 1]

The heating portion of the regenerator containing the absorbing liquid is heated by the heating source (during cooling / heating operation).

Further, in a cold state (a state where the absorption liquid in the regenerator is cold during the first operation or after the operation has been stopped for a long time), the heating power of the heating source is largely fixed until the operation is stabilized at the start, Quickly.

When the hot state (the state where the absorption liquid in the regenerator is hot since the start of operation or the stop of the operation since the start of the temporary operation has not elapsed since the temporary operation is stopped), the heating power of the heating source is fixed small until the operation is stabilized at the start Prevent overheating of regenerator.

During the cooling operation, the hot vapor refrigerant is fed into the condenser from the regenerator, and since the cooling water flows through the condenser heat transfer pipe, it liquefies and stays in the condenser.

The liquefied refrigerant fed into the evaporator from the condenser is scattered on the evaporator heat transfer tube through which the cold / hot water flows, thereby evaporating the vaporized heat and evaporating, thereby cooling the cold / hot water. Then, the cooled cold / hot water is supplied to the indoor heat exchanger by the cooling water pump, passes through the indoor heat exchanger, and the blowing fan blows the cold air into the room, thereby cooling the room.

During the heating operation, the high-temperature absorbing liquid from the regenerator is fed into the evaporator. Thereby, the cold / hot water flowing through the evaporator heat transfer tube is heated. The hot and cold water that has been heated is supplied to the indoor heat exchanger by the cold / hot water pump, passes through the indoor heat exchanger, and the blowing fan blows warm air into the room, thereby heating the room.

During the cooling operation, the vapor refrigerant evaporated in the evaporator and introduced into the absorber is absorbed by the high-concentration absorber sent from the regenerator, and becomes a low-concentration absorber and stays in the absorber.

During the heating operation, the absorption liquid in the evaporator enters the absorber and stays in the absorber.

The absorption liquid that has stayed in the absorber is returned to the regenerator by the solution pump (during cooling / heating operation).

When the cooling operation / heating operation becomes stable, the controller proportionally controls the heating power of the heating source so that the cold / hot water maintains the predetermined temperature (during cooling / heating operation).

[Claim 2]

In the high temperature regenerator containing the absorption liquid, the heating portion is heated by the heating source (during cooling / heating operation).

Further, in a cold state (a state where the absorption liquid in the high temperature regenerator is cooled at the time of the first operation or a long time from the operation stop), the heating power of the heating source is largely fixed until the operation becomes stable at the start, The temperature of the absorption liquid is rapidly raised.

Further, when the hot state (the state in which the absorption liquid in the high temperature regenerator is hot since the operation start or the operation stop has not elapsed from the time of the temporary operation) has been fixed, the heating power of the heating source is fixed Thereby preventing overheating of the high temperature regenerator.

During refrigerating operation, since the refrigerant of the low concentration absorbing liquid entering the high temperature regenerator is vaporized, the middle density is separated into the absorbing liquid and the high temperature vapor refrigerant, and the medium density absorbing liquid is sent to the low temperature regenerator.

During the cooling operation, high-temperature vapor refrigerant is supplied from each regenerator to the condenser.

During the cooling operation, since the cooling water flows through the condenser tube, the high-temperature steam refrigerant condenses in the condenser.

During the heating operation, the high-temperature absorbing liquid is fed into the evaporator from the high-temperature regenerator. Thus, the cold / hot water flowing through the evaporator heat transfer tube is heated.

During the cooling operation, the liquefied refrigerant sent into the evaporator from the condenser is scattered on the evaporator heat transfer tube through which the cold / hot water flows to evaporate the evaporation heat and evaporate to cool the cold / hot water. Then, the cooled cold / hot water is supplied to the indoor heat exchanger by the cold / hot water pump, passes through the indoor heat exchanger, and the blowing fan blows the cold air into the room.

During the heating operation, the hot and cold water that has been heated is supplied to the indoor heat exchanger through the cold / hot water pump, passes through the indoor heat exchanger, and blows air into the room through the blowing fan.

During the cooling operation, the vapor refrigerant vaporized in the evaporator and introduced into the absorber is absorbed by the high-concentration absorber sent from the high-temperature regenerator, and becomes the low-concentration absorber and stays in the absorber.

During the heating operation, the absorbing liquid in the evaporator enters the absorber and stays in the absorber.

The absorption liquid that has stayed in the absorber is returned to the high temperature regenerator by the solution pump (during cooling / heating operation).

When the cooling operation / heating operation becomes stable, the controller proportionally controls the heating power of the heating source so that the cold / hot water maintains the predetermined temperature (during cooling / heating operation).

[Effects of the Invention]

[Claim 1]

In the case of the cold state, since the heating power of the heating source is largely fixed until the operation is stabilized at the start, the temperature of the absorption liquid rapidly rises in the regenerator, and generation of the high concentration absorption liquid and generation of liquefied refrigerant . As a result, the cold / hot water is cooled by evaporation of the liquefied refrigerant in the evaporator and the vapor refrigerant is quickly absorbed in the absorber, and the heating of the cold / hot water in the evaporator is performed rapidly in the heating operation. Cold air or hot air can be blown out into the room. Therefore, the absorption type air conditioner of the present configuration can shorten the time until the cooling / heating capability is exerted in comparison with the absorption type air conditioner in which the heating power is fixed to, for example, the midpoint at the start in the cold state .

Further, in the case of the hot state, since the heating power of the heating source is fixed small until the operation at the start is stabilized, the absorption liquid in the regenerator is not overheated. Therefore, it is possible to prevent an unstable operation state due to the cooling OFF, the heating OFF and the like, and the repetition of the start in the OFF state, as well as the heating loss does not occur at the start in the hot state.

[Claim 2]

In the case of the cold state, since the heating power of the heating source is largely fixed until the operation at the start is stabilized, the temperature of the absorption liquid in the high temperature regenerator rises quickly, and during the cooling operation, The generation of refrigerant is promoted. As a result, the cold / hot water is cooled by evaporation of the liquefied refrigerant in the evaporator, and the vapor refrigerant is quickly absorbed in the absorber, and in the evaporation operation, the superheat of the hot / Cold air or warm air can be taken out into the room. Therefore, the absorption type air conditioner of the present configuration can shorten the time until the cooling / heating capability is exerted, as compared with the absorption type air conditioner in which the heating power is fixed to, for example, the midpoint at the start in the cold state .

Further, in the case of the hot state, since the heating power of the heating source is fixed small until the operation at the start is stabilized, the absorbing liquid in the high temperature regenerator is not overheated. Therefore, the heating loss is not generated at the start of the hot state, and the unstable operation state due to the cooling OFF, the heating OFF, and the like can be prevented by repeating the start in the OFF state.

BRIEF DESCRIPTION OF THE DRAWINGS Fig.

An embodiment of the present invention (corresponding to Claim 2) will be described with reference to FIGS. 1 to 6. As shown in the figure, the absorption type air conditioning apparatus A includes a cooling water circuit 1 for circulating cooling water 10 during cooling operation, a cold / hot water circuit 2 for circulating cold / hot water 20 during cooling / The absorption liquid circuit 8 constituted by the solution pump section 801 of the high temperature regenerator 3, the low temperature regenerator 4, the condenser 5, the evaporator 6, the absorber 7 and the tandem pump 80, , And a controller (9).

The cooling water circuit 1 includes a cooling tower 11 (outdoor heat exchanger) provided with a cooling tower fan 111, a cooling water tank 12, a cooling water pump 13, an absorber heat transfer pipe 14 and a condenser heat transfer pipe 15 And the cooling water pump 13 (1230l / h) is operated to circulate the cooling water 10 during the cooling operation.

During the cooling operation, the cooling tower fan 111 is driven by the AC condenser motor 112. The alternating-current condenser motor 112 is connected to AC-100V through a triac (not shown), and is rotated by the controller 9 so that the cooling water temperature detected by the cooling water temperature sensor 91 is maintained at 31.5 캜. (In cooling proportional control).

The cooling water temperature sensor 91 is installed in the cooling water pipe 101 connecting between the cooling water pump 13 and the absorber heat transfer pipe 14 and detects the temperature of the cooling water 10 supplied to the absorber heat transfer pipe 14.

During the heating operation, all of the cooling water 10 in the cooling water circuit 1 escapes and the AC condenser motor 112 is not energized.

The cold / hot water circuit 2 includes an indoor heat exchanger 21, a water tank 22, a cold / hot water pump unit 802 (at the maximum capacity of 620 liters / h) and an evaporator heat transfer pipe 24 provided with a blowing fan 211 And the cold / hot water 20 is circulated by the cold / hot water pump unit 802 of the tandem pump 80. The amount of heat absorbed by the indoor heat exchanger 21 during the cooling operation is 4340 kcal (at the maximum capacity), and the amount of heat discharged from the indoor heat exchanger 21 during the heating operation is 6200 kcal (at the maximum capacity).

The high temperature regenerator 3 is composed of a boiling water vessel 31 for heating the absorption liquid with the gas burner 311, a separating vessel 32 erected on the boiling water vessel 31 and a collecting vessel 33, The refrigerant (water) contained in the low concentration absorbing liquid 30 (58% aqueous lithium bromide solution) in the boiling water 31 is evaporated to separate into the medium absorbing liquid 34 (60% lithium bromide aqueous solution) and the vapor refrigerant 35.

The gas burner 311 is of a spray gun type and gas is supplied to the gas pipe 315 provided with the gas solenoid valves 312 and 313 and the gas proportional valve 314 in series. The combustion air is supplied and burned.

321 is an interval for insulation. The HGE temperature sensor 301 for detecting the temperature of the low concentration absorbent 30 (hereinafter referred to as the HGE temperature) in the high temperature regenerator 3 is provided at a proper position of the hot water boiler 31.

The cold / hot water sensor 201 is provided in the cold / hot water pipe 29 on the inlet side of the indoor heat exchanger 21 and detects the temperature of the cold / hot water 20 supplied to the indoor heat exchanger 21.

The controller 9 sets the gas supply amount of the gas burner 311 at the start of ignition to 8000 kcal / h, and when the HGE temperature is > 150 DEG C or the cold / hot water temperature When it is ≤11 ℃, 4800kcal / h is set.

When the cooling operation is started in the hot state (HGE temperature 80 deg. C), the controller 9 sets the gas supply amount of the gas burner 311 at 2500 kcal / h at the start of ignition.

When the cooling and cooling operation becomes stable and the temperature of the cold and hot water becomes? 9 占 폚, the controller 9 sets the temperature (average temperature) of the cold / hot water 20 detected by the cold / hot water sensor 201 to 1500 kcal / h to 4800 kcal / (cooling proportional control) of the gas supply amount of the gas burner 311 is performed.

When the heating operation is started in the cold state (HGE temperature <60 DEG C), the controller 9 sets the gas supply amount of the gas burner 311 at the start of ignition to 8000 kcal / h. When the heating operation is started in the hot state (HGE temperature ≥60 캜), the controller 9 sets the gas supply amount of the gas burner 311 at the start of ignition to 2500 kcal / h.

When the heating operation becomes stable and the temperature of the cold and hot water becomes? 58 占 폚, the controller 9 sets the temperature (average temperature) of the cold and hot water 20 detected by the cold / hot water sensor 201 to 1500 kcal / h to 8000 kcla / (heating proportional control) of the gas supply amount of the gas burner 311 is performed.

Since the cooling / heating changeover valve 36 is closed during the cooling operation, the middle density absorbent liquid 34 (165 ° C) is absorbed by the medium density absorbent liquid pipe 341, the high temperature heat exchanger oil channel 342, and the orifice 343 Temperature regenerator 4 through the absorption liquid pipe 344. The low-

The low temperature regenerator 4 surrounds the collecting container 33 and the medium density absorbent 34 is heated by the heat from the collecting container 33 during the cooling operation. As a result, a portion of the medium-concentration absorbent 34 is vaporized and separated into the high-concentration absorbent 41 (62% lithium bromide aqueous solution) and the vapor refrigerant 42. In the heating operation in which the heating / cooling switching valve 36 is opened, since the passage resistance is generated by the orifice 343 in the middle density absorber pipe 344, all the heavy density absorbent 34 flows into the heating pipe 361 It is not fed into the low temperature regenerator 4.

The vapor refrigerant 35 and 42 is supplied to the condenser 5 from the high temperature regenerator 3 and the low temperature regenerator 4. The vapor refrigerant 35 and 42 is supplied to the cooling water 10 flowing through the coil- And the liquefied refrigerant (water) 52 stays at the bottom of the condenser 5. Further, the cooling water 10 whose temperature has been raised (37.5 ° C) is cooled (31.5 ° C) by the cooling tower 11.

The evaporator (6) is provided with a coil-shaped evaporator heat transfer tube (24).

The high temperature absorbing liquid in the high temperature regenerator 3 is sent to the evaporator 6 through the heating / cooling switching valve 36 and the heating pipe 361 since the heating / cooling switching valve 36 is opened during the heating operation.

During the cooling operation, the liquefied refrigerant 52 is scattered on the evaporator heat transfer tube 24 through the refrigerant pipe 53, the refrigerant valve 54, the diffuser 55, mmHg), the liquefied refrigerant 52 takes the heat of vaporization from the cold / hot water 20 flowing in the evaporator heat transfer pipe 24 and evaporates. The cooled cold / hot water 20 is heat-exchanged with the air blown into the room from the indoor heat exchanger 21 placed in the room (the endothermic heat is about 400 kcal / h at maximum capacity), and the hot / Passes through the evaporator heat transfer tube (24) and is cooled.

The absorber 7 provided with the absorber heat transfer tube 14 is juxtaposed to the evaporator 6 and the upper portion is communicated with the evaporator 6. [

During the cooling operation, the vapor refrigerant evaporated in the evaporator 6 enters the absorber 7 from the upper part, and the low temperature regenerator 4 → the high concentration absorber pipe 411 → the low temperature heat exchange glass 412 → the high concentration absorber pipe The low concentration absorbing liquid 30 absorbed by the high concentration absorbing liquid 41 scattered on the absorber heat transfer pipe 14 through the acid aerator 41 is left at the bottom of the absorber 7.

In the heating operation, the high-temperature absorbing liquid enters the absorber 7 from the evaporator 6.

The tandem pump 80 with a Hall element (not shown) is a three-phase brushless DC motor operated by AC-100V and includes a solution pump unit 801 and a cold / hot water pump unit 802, .

The tandem pump 80 is feedback-controlled to rotate based on the HGE temperature-revolution number operating line in the cooling proportional operation.

During the heating proportional operation, feedback control is performed so as to rotate based on the gas supply amount-rotation number operation line.

It is also possible to use a cold / hot water pump and a solution pump (two in total) instead of the tandem pump 80 (one).

The low concentration absorbent 30 remaining at the bottom of the absorber 7 is connected to the low concentration absorber pipe 71 → the solution pump part 801 → the low concentration absorber pipe 72 → the low temperature / high temperature heat exchange passage 73 → the low concentration absorber pipe 74 of the high temperature regenerator 3 to the non-register 31 of the high temperature regenerator 3.

The controller 9 controls the temperature of the HGE temperature sensor 301 for detecting the temperature of the absorption liquid in the boiling water 31 and the temperature of the cold / hot water 20 supplied to the indoor heat exchanger 21 A coolant temperature sensor 91 for detecting the temperature of the coolant 10 to be supplied to the hall element and the absorber heat transfer pipe 14, a cold / hot water sensor 201 for detecting the temperature of the evaporator 6, an EVA temperature sensor 61 for detecting the internal temperature of the evaporator 6, On the basis of a signal from the control unit (not shown).

The water supply valve 221, the gas solenoid valve 312.313, the gas proportional valve 314, the tandem pump 80, the cooling water pump 13, the cooling tower fan 111, the refrigerant valve 54, Heating / cooling switching valve (36).

During the cooling operation or the heating operation, the absorption type air conditioning apparatus (A) operates as follows.

In the high temperature regenerator 3 containing the absorbing liquid, the boiling water 31 is heated by the gas burner 311 (during cooling / heating operation).

During the cooling operation, the refrigerant in the low-concentration absorbent 30 is vaporized and separated into the medium-concentration absorbent 34 and the vapor refrigerant 35.

In the cooling operation (see FIG. 3), the high-temperature regenerator 3 and the low-temperature regenerator 4 feed the high-temperature vapor refrigerant 35, 42 to the condenser 5.

The liquefied refrigerant 52 sent to the evaporator 6 from the condenser 5 is dispersed on the evaporator heat transfer tube 24 through which the cold / hot water 20 flows to evaporate the evaporation heat and evaporate. The evaporated vapor refrigerant enters the absorber 7 Concentration absorber 41 sent from the low temperature regenerator 4 to become the low concentration absorber 30 and stay in the absorber 7 so that the solution pump unit 801 keeps the boiling water 31 of the high temperature regenerator 3, Returning to me.

The liquefied refrigerant cools the cold / hot water 20 when evaporating on the evaporator heat transfer pipe 24 through which the cold / hot water 20 flows, and the cooled cold / hot water 20 is sent to the indoor heat exchanger 21 by the cold / hot water pump unit 802 Passes through the indoor heat exchanger (21), and the cooling fan is sucked into the room by the blowing fan (211), thereby cooling the room. At this time, the indoor controller 25 controls the flow rate control valve 27 and the blowing fan 211 so that the room temperature detected by the room temperature sensor 26 becomes the set room temperature set by the room temperature setter (not shown).

When the cooling operation is stabilized (cold / hot water ≤ 9 ° C; YES in steps s 7 and s 10 in FIG. 4), the controller 9 controls the cold / hot water 20 supplied to the indoor heat exchanger 21 based on the output of the cold / (Cooling proportional control: 1500 kcal / h to 4800 kcal / h) so that the temperature of the gas burner 311 is 7 ° C.

The controller 9 performs feedback control of the cooling tower fan 111 so that the temperature of the cooling water 10 supplied to the absorber heat transfer pipe 14 is maintained at 31.5 캜 during the cooling proportional control.

In the case of the heating operation, the high-temperature absorbing liquid is sent from the high-temperature regenerator 3 through the heating pipe 361 to the evaporator 6, and the absorbing liquid heats the cold / hot water 20 flowing through the evaporator heat- Enters the absorber 7, and stays in the absorber 7. Further, the absorption liquid that has stood is returned to the boiling water 31 by the solution pump unit 801.

The cold / hot water 20 heated and heated by the high-temperature absorbing liquid is supplied to the indoor heat exchanger 21 by the cold / hot water pump unit 802, passes through the indoor heat exchanger 21, The hot air is drawn into the room, thereby cooling the room.

When the heating operation is stabilized (cold / hot water ≥58 ° C; YES in steps S5 and S8 in FIG. 6), the controller 9 controls the cold / hot water 20 supplied to the indoor heat exchanger 21 based on the output of the cold / (Heating proportional control: 1500 kcal / h to 8000 kcal / h) so that the temperature of the gas burner 311 becomes 60 占 폚.

The indoor controller 25 controls the flow rate control valve 27 and the blowing fan 211 so that the room temperature detected by the room temperature sensor 26 becomes the set room temperature set by the room temperature setter (not shown).

Next, the controller 9 in the cooling operation of the absorption type air conditioning apparatus A will be described in detail with reference to the operation explanatory diagram of FIG. 3 and the flowchart of FIG.

When the user turns on the cooling operation switch (not shown), the microcomputer of the controller 9 operates based on the flowchart of FIG.

A cooling tower process (CT process) for instructing the water supply valve 221 to be opened and filling the water tank 22 with water is performed in step s1, and then the process goes to step s2.

In step s2, it is determined whether or not the HGE temperature is equal to or higher than 80 占 폚 based on the output of the HGE temperature sensor 301. If the HGE temperature is lower than 80 占 폚 (NO; cold start) (YES, hot start), the procedure goes to step s8.

In step s3, an ignition operation is performed, and the gas burner 311 starts combustion. Also, the cooling / heating switching valve 36 is kept closed. At step s4, the cooling operation is started with the gas supply amount set at 800 kcal / h. When the HGE temperature reaches 80 deg., Energization with the tandem pump 80 is started. Further, when the HGE temperature reaches 100 캜, the cooling water pump 13 starts energizing.

Step s3 Determine whether the HGE temperature ≥150 캜 or the cold / hot water ≤11 캜 is satisfied. If one of them is true (YES), the process goes to step s6. If neither of them is true (NO) To maintain the gas supply amount of 8000 kcal / h.

In step s6, the gas supply amount is reduced to 4800 kcal / h, and the rotation of the tandem pump 80 is also reduced. In step s7, it is determined whether or not the cold / hot water has decreased to 9 DEG C or less. If YES in step S7, the process goes to step S11. If NO in step S7, the process returns to step S6 to obtain 4800 kcal / Maintain supply.

In step s8, an ignition operation is performed, and the gas burner 311 starts combustion. Also, the cooling / heating switching valve 36 is kept closed. At step s9, the cooling operation is started with the gas supply amount at 2500 kcal / h, and the tandem pump 80 is started to be energized. Further, when the HGE temperature reaches 100 캜, the cooling water pump 13 starts energizing.

In step s10, it is determined whether the cold / hot water has decreased to 9 DEG C or lower. If YES in step S9, the process goes to step S11. If the result is NO in step S9, The gas supply amount of the gas is maintained.

In step s11, the controller 9 determines whether the temperature of the cold / hot water 20 supplied to the indoor heat exchanger 21 is 7 ° C based on the output of the cold / hot water sensor 201, Proportional control (1500 kcal / h to 4800 kcal / h). Further, the tandem pump 80 is feedback-controlled to a rotation speed proportional to the HGE temperature (HGE temperature-rotation number operation line). Further, the cooling tower fan 111 is feedback-controlled so that the temperature of the cooling water 10 supplied to the absorber heat transfer tube 14 is maintained at 31.5 캜.

In step s12, it is determined whether or not the cold / hot water <5 ° C or the room temperature <the set temperature is established (heating OFF, cooling OFF). If either of them is established (YES) NO), the flow returns to step s11 to continue the cooling proportional control.

In step s13, the gas burner 311 is extinguished.

In step s14, a cooling OFF operation process or a heating OFF operation process, which will be described later, is performed, and the process proceeds to step s15.

[Cooling OFF operation processing]

After the gas burner 311 is extinguished, when the HGE temperature exceeds 100 캜, the tandem pump 80 is feedback-controlled based on the HGE temperature-revolution number operating line.

When the HGE temperature falls below 100 캜, the rotation number of the tandem pump 80 is fixed to 900 rpm, and the cooling / warming-up valve 36 is opened to stop the cooling water pump 13.

[Heating OFF operation processing]

When the gas burner 311 is extinguished, the cooling water pump 13 is stopped after 10 seconds.

In step s15, it is judged whether or not the cold / hot water ≥ 7 캜 (in case of cooling OFF) or the room temperature ≥ the set temperature (in case of heating OFF) The process returns to step s8. If it is not established (NO), the process returns to step s14 to perform the cooling OFF operation process or the heating OFF operation process.

Next, a detailed description of the controller 9 during the heating operation of the absorption type air conditioning apparatus A will be described based on the operation explanatory diagram of FIG. 5 and the flowchart of FIG.

When the user turns on the heating operation switch (not shown), the microcomputer of the controller 9 operates based on the flowchart of FIG.

In step S1, a drain valve (not shown) is kept open to drain the cooling water 10 of the cooling water circuit 1. When the drainage process is completed, the controller 9 determines whether or not HGE≥60 ° C. In step S2, if HGE <60 ° C (cold start; NO), the process goes to step S3. If HGE≥60 ° C YES), the flow advances to step S6.

In step S3, the controller 9 performs an ignition operation, and the gas burner 311 starts combustion. In addition, the cooling / heating switching valve 36 is opened. In step S4, the controller 9 starts the heating operation with the gas supply amount at 8000 kcal / h. When the HGE level reaches 60 deg. C, the tandem pump 80 starts energizing and rotates at about 3000 rpm (constant).

In step S5, the controller 9 determines whether the cold / hot water 20 supplied to the indoor heat exchanger 21 has been heated to 58 DEG C or higher based on the output of the cold / hot water sensor 201, (NO in step S9), the flow returns to step S4 to maintain the gas supply amount of 8000 kcal / h.

In step S6, the controller 9 performs an ignition operation, and the gas burner 311 starts combustion. In addition, the cooling / heating switching valve 36 is opened. In step S7, the controller 9 starts the heating operation with the gas supply amount set at 2,500 kcal / h, starts energizing with the tandem pump 80, and rotates at about 2000 rpm (constant).

In step s8, the controller 9 determines whether the cold / hot water 20 supplied to the indoor heat exchanger 21 has been heated to 58 DEG C or higher based on the output of the cold / hot water sensor 201, (NO in step S9), the flow returns to step S7 to maintain the gas supply amount of 2500 kcal / h.

In step S9, the controller 9 sets the gas supply amount of the gas burner 311 to the heating proportional control (1500 kcal / h to 8000 kcal / h) so that the temperature of the cold / hot water 20 supplied to the indoor heat exchanger (21) h). Further, the tandem pump 80 is feedback-controlled based on the gas supply amount-rotation speed operation line.

Tandem revolution speed (rpm) = gas supply amount (kcal / h) x K + A (K, A is an integer)

In step S10, it is determined whether cold / hot water ≥62 ° C or room temperature> set temperature is established (heating OFF, heating OFF). If any one of them is established (YES) NO), the flow returns to step S9 to continue the heating proportional control.

In step S11, the gas burner 311 is instructed to be extinguished.

In step S12, a heating OFF operation process or a heating OFF operation process, which will be described later, is performed, and the process goes to step S13.

[Heating OFF operation processing]

When the gas burner 311 is extinguished, the controller 9 changes the rotation speed control of the tandem pump 80 from the gas supply-rotation operation line control to the HGE temperature-rotation operation line control.

[Heating OFF operation processing]

When the gas burner 311 is extinguished, the controller 9 changes the rotational speed control of the tandem pump 80 from the gas supply-rotational speed operation line control to the HGE temperature-rotation operation line control.

In step S13, it is determined whether or not the cold / hot water ≤60 캜 (heating OFF) or the room temperature ≤ the set temperature (heating OFF) is established. Return to step S6. If it is not established (NO), the process returns to step S12 to perform the heating OFF operation process or the heating OFF operation process.

Next, advantages of the absorption type air conditioning apparatus (A) of the present embodiment will be described.

The absorption type air conditioner (A) starts the cooling operation / heating operation in the cold state when the HGE temperature is low (less than 80 占 폚 in cooling operation and less than 60 占 폚 in heating operation) after a long time elapses from the first operation or previous operation stoppage , The gas supply amount of the gas burner 311 is set at 8000 kcal / h until the temperature of the cold and hot water from the ignition becomes a predetermined temperature (9 캜 or less in the cooling and 58 캜 or more in the heating) The temperature of the liquid refrigerant in the evaporator 6 is rapidly increased and the evaporation of the liquefied refrigerant in the evaporator 6 and the absorption of the liquid in the absorber 7 by the generation of the high concentration absorbent 41 and the generation of the liquefied refrigerant And promotes the heating of the cold / hot water 20 by the high-temperature absorbing liquid during the heating operation.

Therefore, compared to the absorption type air conditioner in which the gas supply amount at the start is fixed to the midpoint (4000 kcal / h), for example, in the range of the combustion capability, at the start of the cooling operation / Can shorten the time until the cooling ability and the heating ability are exerted to 1/2 to 1/3.

In the absorption type air conditioner (A), the HGE temperature is high (80 DEG C or more in cooling operation, 60 DEG C or more in heating operation) since not much time has elapsed since cooling / heating OFF, , The gas supply amount of the gas burner 311 is set to 2500 kcal / h until the temperature of the cold / hot water in the ignition becomes a predetermined temperature (9 [deg.] C or less in the cooling or 58 [deg.] C or more in the heating) h.

Therefore, the absorption type air conditioning apparatus A can prevent overheating of the high temperature regenerator 3 at the start of the cooling operation / heating operation in the hot state.

Therefore, loss of the gas supply amount can be prevented, so that gas is unnecessarily consumed.

In addition, hunting does not occur much at the time of start of the operation from the cooling / heating OFF and the heating OFF, so that the cooling / heating proportional control can be quickly performed.

The present invention includes the following embodiments in addition to the above embodiment.

a. In the above embodiment, the absorption liquid circuit 8 may be changed to the following configuration and has the effect equivalent to that of the absorption type air conditioning apparatus A (corresponding to claim 1).

The absorption liquid circuit 8 includes a regenerator in which a heating section containing an absorbing liquid is heated by a heating source such as a gas burner, a condenser in which a condenser heat transfer tube is provided and a high temperature vapor refrigerant is fed from a regenerator, An evaporator for evaporating the liquefied refrigerant liquefied in the condenser during the cooling operation, and an absorber heat pipe installed in the evaporator, wherein the evaporator vapor refrigerant evaporated in the evaporator is absorbed by the high-concentration absorber An absorber, and a solution pump for returning the absorbing solution in the absorber to the regenerator.

As described above, when the absorption liquid circuit 8 is of a one-size-fader type, the cooling / heating efficiency is lower than that of the double-effect type (absorption type air conditioner A), but the structure of the absorption type air conditioner can be simplified.

b. In this embodiment, the low gas supply amount (2500 kcal / h) is set at the start of operation in the hot state and the high gas supply amount (8000 kcal / h) at the start of operation in the cold state. However, The amount of gas to be supplied may be determined.

c. The determination of the cold state and the hot state may be made at the elapsed time from the last operation end in addition to the HGE temperature.

d. The heating source may be an electric heater or the like other than the gas burner.

e. The absorption type air conditioner may be dedicated to cooling.

f. In the above embodiment, the stable operation period is determined as the temperature of the cold / hot water. However, the low concentration absorbent solution temperature (HGE temperature) in the high temperature regenerator may be a predetermined temperature or a predetermined time period may be elapsed by the timer.

Claims (2)

An outdoor heat exchanger, an absorber heat transfer pipe, and a condenser heat transfer pipe are connected in an annular manner. In cooling operation, a cooling water circuit for circulating cooling water by a cooling water pump, an indoor heat exchanger and an evaporator heat pipe, A cold / hot water circuit for circulating the cold / hot water through a cold / hot water pump, a regenerator heated by a heating source for heating the absorption liquid, a condenser provided with the condenser heat transfer pipe for feeding the hot steam refrigerant from the regenerator, An evaporator for evaporating the liquefied refrigerant that has been pumped by the condenser at the time of cooling operation while being supplied with a high-temperature absorbing liquid at the time of operation, a vapor refrigerant evaporated from the evaporator at the evaporator in parallel with the absorber heat- In the high-concentration absorbent solution sent from the regenerator, And a controller for controlling the heating power of the heating source so that the cold / hot water maintains the predetermined temperature, wherein the cold / hot water is cooled by the cooling fan And a controller for controlling the temperature of the absorbing liquid in the regenerator so that the temperature of the absorbing liquid in the regenerator is lowered, And when the operation is started at a high temperature, the heating power of the heating source is fixed to a small value until the operation is stabilized, thereby controlling the operation of the absorption type air conditioner. An outdoor heat exchanger, an absorber heat transfer pipe, and a condenser heat transfer pipe are connected in an annular manner. In cooling operation, a cooling water circuit for circulating cooling water by a cooling water pump, an indoor heat exchanger and an evaporator heat pipe, A cold / hot water circuit for purifying the cold / hot water by a cold / hot water pump, and a heating unit containing the absorbing liquid are heated by a heating source, and the refrigerant in the low concentration absorbing liquid is vaporized during cooling operation to be separated into a heavy density absorbent and a vapor refrigerant Temperature regenerator, a low-temperature regenerator surrounding the high-temperature regenerator and separating the heavy-liquid absorbing liquid into a high-concentration absorbing liquid and vapor refrigerant in a cooling operation mode, a condenser heat transfer pipe provided in the condenser heat transfer pipe, Temperature regenerator at a high temperature And an evaporator for evaporating the liquefied refrigerant from the condenser during the cooling operation, the absorber heat pipe being installed in the evaporator, and the vapor refrigerant evaporated in the evaporator during the cooling operation, An absorber circuit having an absorber for absorbing the high-concentration absorber and a solution pump for returning the absorber in the absorber to the high-temperature regenerator, and a controller for controlling the heating power of the heating source so that the hot / A method of operating an absorption ceiling air conditioner for cooling and heating indoor air by blowing cold air or warm air to a room by a blowing fan, the method comprising: when operation is started in a state where the temperature of the absorption liquid in the regenerator is low, , The heating power of the heating source is fixed to a large value, If the former, the method of controlling the start until the stable absorption air conditioner characterized in that the smaller fixed by controlling the heating power of the heating source.