JP2955241B2 - Multi-type absorption air conditioning system and outdoor unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system using an absorption chiller / heater, and more particularly to a multi-type absorption air conditioning system capable of performing a cooling / heating operation according to a request of a user who individually requests air conditioning.

[0002]

2. Description of the Related Art An air conditioning system using an absorption chiller / heater is
For example, as described in "Small and Medium-sized Gas Air Conditioning System" (Japan Refrigeration Association, issued on March 25, 1989), the air conditioning system was basically a central air conditioning system. The following three systems are known as the central air conditioning system.

[0003] 1) All air method: As shown in FIG.
An air conditioner AHU is combined with the absorption chiller / heater 30, and the cool and hot air is distributed and supplied to each room in the building by the cool and hot air duct 107. The air conditioner is operated by operating the remote operation panel 101 and the remote operation panel 103 of the absorption chiller / heater 30, respectively. Although all the rooms in the building to which the hot and cold air is supplied can be air-conditioned collectively, it takes a long time to become comfortable, and it is not energy saving because it air-conditions unmanned rooms that do not need air conditioning. There is.

2) Water-air system: As shown in FIG. 4, a plurality of air conditioners AHU are dispersedly arranged in a building,
In this system, the main pipe 105 of the hot / cold water is provided from the absorption chiller / heater 30 to the air conditioner AHU.
If the absorption chiller / heater 30 is operated, operating only the AHU operation switch 109 of each air conditioner AHU can air-condition only that area, which is more energy saving than the all-air system. Regardless of the air conditioning requirements of the user in each room, it is necessary to first operate the absorption chiller / heater 30. If the air conditioner AHU is not operating at that time, the solution in the absorption chiller / heater 30 is over-concentrated and crystallized,
The AHU
There is a drawback that selfish driving is not possible.

[0005] 3) All-water system ... As shown in Fig. 5, a plurality of fan coil units FC are distributed and arranged in the building, and the absorption chiller / heater 30 and the chiller / warmer main pipe 10
5. The system is connected via the cold / hot water branch pipe 106. Since the cold / hot water branch pipe 106 is arranged on the indoor ceiling or the like,
This is a system that has a high risk of water leakage, which is a great enemy for the A equipment. Irrespective of the air-conditioning requirements of the user in each room, it is necessary to first operate the absorption chiller / heater 30, and at that time, if the fan coil unit FC is not operating, the solution in the absorption chiller / heater 30 will be discharged. Overconcentrated and crystallized,
There is a disadvantage that the fan coil unit FC cannot be operated on its own because troubles such as a diluting operation cannot be performed.

As described above, the absorption chiller / heater 30 is used as a heat source for central air conditioning as a supply source of cold water or hot water (hereinafter, referred to as cold / hot water) at a constant temperature. Further, the absorption chiller heater 30 is required to switch a cycle of heating operation and cooling operation, it is set up in advance either.

[0007]

In the above-mentioned air conditioning system using the conventional absorption chiller / heater, the operation of the air conditioner AHU in each room in the building is different from the operation of the absorption chiller / heater 30 as the outdoor unit. It is necessary to turn on each operation switch when performing air conditioning, and even if a person in a certain room (or floor) thinks that air conditioning is required and turns on the operation switch of the air conditioner AHU, it is absorbed. There is a problem that air conditioning cannot be performed unless the operation switch of the water heater 30 is turned on. In addition, these switch operations require an operation procedure for operating such that troubles such as solution crystals do not occur. That is, at the time of starting the cooling operation of the absorption chiller / heater 30, it is necessary to allow time for a solution concentration difference to occur before the start of cooling, and at the time of stoppage, the concentrated solution is cooled by natural heat radiation to prevent crystallization. Requires a dilution time. If the operation is performed with no heat load from the air conditioner AHU or the fan coil unit FC at the time of starting or stopping these, problems such as the generation of solution crystals and the inability to perform the dilution operation occur as described above.
Therefore, before the absorption chiller / heater 30 is operated, it is necessary to operate a part or all of the AHUs or FCs so as to circulate the chilled / hot water regardless of the load requirement. However, these operations were complicated and prevented ordinary users from driving. In addition, switching between the cooling / heating operation modes also requires switching the operation of the absorption chiller / heater 30 main body. That is, it is an operation of switching the refrigerant cycle and draining the cooling water from the heat exchanger of the absorber and the condenser, and these operations are also operations that cannot be performed by general users. Further, as described above, since part or all of the air conditioner AHU or the fan coil unit FC is operated before the absorption chiller / heater 30 is operated to circulate the cool / hot water regardless of the load requirement, There was a problem that useless energy was used for the starting power, the circulating power for hot and cold water, and the like.

An object of the present invention is to provide an easy-to-use multi-type absorption air-conditioning system capable of comfortably air-conditioning in response to an air-conditioning request and a cooling / heating switching request from a plurality of rooms by a general user. An object of the present invention is to provide an energy-saving multi-type absorption air-conditioning system that automatically performs crystallization prevention and control of the flow rate of cold and hot water and does not require cooling in a room that does not require a load.

[0009]

SUMMARY OF THE INVENTION The present invention provides an absorption chiller / heater for heating or cooling circulating water, a piping system for circulating the circulating water, and a water-air heat exchanger for exchanging heat between the circulating water and air. In a multi-type absorption air-conditioning system including a plurality of indoor units having an exchange unit, an operation unit that controls operation / stop of the plurality of indoor units and switching between a cooling operation mode and a heating operation mode, and from the operation unit Means for controlling the operation / stop of the absorption chiller / heater and the switching between the cooling operation mode and the heating operation mode based on the operation / stop signal of the indoor unit and the switching between the cooling operation mode and the heating operation mode. A multi-type absorption air conditioning system is disclosed.

Further, according to the present invention, there is provided an absorption chiller-heater comprising: a high-temperature regenerator for generating a vapor refrigerant by heating a diluted solution diluted with a refrigerant by a heat source; A low-temperature regenerator guided through a path, a condenser for condensing a vapor refrigerant generated in the low-temperature regenerator, and a refrigerant generated in the high-temperature regenerator during heating, guided by a liquid refrigerant condensed in the condenser during cooling. An evaporator in which steam is guided through a second path having a cooling / heating switching valve, an absorber formed in the same container as the evaporator, and absorbing a refrigerant guided to the evaporator, and generated in the absorber. A third path for guiding the diluted solution to the high-temperature regenerator; and a fourth path having a refrigerant feed control valve capable of supplying a liquid refrigerant to the absorber in response to a load change during cooling. Disclosed multi-type absorption air conditioning system featuring That.

The present invention further provides an absorption chiller / heater for heating or cooling circulating water, a piping system for circulating the circulating water, and a water-air heat exchange means for exchanging heat between the circulating water and air. Operating means for controlling operation / stop of the plurality of indoor units and switching between a cooling operation mode and a heating operation mode, and operation of the indoor units from the operation means, in the multi-type absorption air conditioning system including Means for enabling control of operation / stop of the absorption chiller / heater and switching between the cooling operation mode and the heating operation mode based on a / stop signal and switching between the cooling operation mode and the heating operation mode; A multi-type absorption air-conditioning system comprising a remote controller capable of transmitting an indoor unit operation / stop signal is disclosed.

The present invention further comprises an absorption chiller / heater for heating or cooling the circulating water flowing in the closed conduit, and an operation control device for controlling the operation / stop of the absorption chiller / heater. In an outdoor unit for a multi-type absorption air-conditioning system capable of supplying circulating water from the indoor unit to a plurality of indoor units, the operation control device controls the absorption chiller / heater based on operation / stop signals from the plurality of indoor units. Disclosed is an outdoor unit for a multi-type absorption air conditioning system, wherein the outdoor unit is configured to be able to control start / stop. Further, according to the present invention, the absorption chiller / heater has a high temperature regenerator that generates a vapor refrigerant by heating a dilute solution diluted with a refrigerant, and the vapor refrigerant generated by the high temperature regenerator is guided through a first path. A low-temperature regenerator, a condenser for condensing a vapor refrigerant generated in the low-temperature regenerator, and a cooling / heating switching valve for guiding the liquid refrigerant condensed in the condenser during cooling and guiding the refrigerant vapor generated in the high-temperature regenerator during heating. An evaporator guided through a second path having the same, an absorber formed of the same container as the evaporator, for absorbing the refrigerant guided to the evaporator, and a dilute solution generated by the absorber, An outdoor unit for a multi-type absorption air conditioning system, comprising: a third path leading to a regenerator. Further, the present invention discloses an outdoor unit for a multi-type absorption air conditioning system, comprising a cistern connected to the evaporator via a pipe. Further, the present invention provides the absorption type chiller / heater having a fourth path having a refrigerant feed control valve capable of supplying a liquid refrigerant to the absorber according to a load change during cooling. An outdoor unit of a type air conditioning system is disclosed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to embodiments. FIG. 2 is a sketch drawing showing the overall schematic configuration of the system of the present invention. In the figure, the multi-type absorption type air conditioning system of the present invention uses an absorption chiller / heater 30 as an outdoor unit and chilled / hot water sent from the chilled / hot water pipe 45 through an intake port 39 and a suction duct 38 and a filter. The indoor unit 31 that regulates and sends out the temperature of the air taken in via the air duct 37, and controls the flow rate of the air sent from the indoor unit 31 via the air duct 36 to the blow-out duct 3.
3. An air volume control device (VAV unit) 34 for sending the air to the outlet 32. Each indoor unit 31 is controlled by a controller 40 provided for the indoor unit 31, and the air volume of each VAV unit 34 is controlled by a room thermostat 35.
Is controlled by controlling the degree of opening of a damper (not shown) by the output of.

Further, the cold / hot water pipe 45 is connected to the absorption cold / hot water machine 3.
0, a plurality of sub-lines 45C to a plurality of indoor units 31, a main line 45A and a plurality of sub-lines 4
5B and a branch pipe 45B for branching cold and hot water. As a result, the cold / hot water from one absorption chiller / heater 30 is distributed to each indoor unit 31, and a multi air conditioning system can be configured. Further, each indoor unit 31 has a water-air heat exchange function. This is achieved by disposing the sub-line 45C inside the intake duct 37 (or a part of the line of the indoor unit 31) and transmitting the heat of the cold / hot water in the sub-line 45C to the air in the intake duct 37. To achieve. In addition, the conduit 45 is
It will be clear from the figure that it has a reciprocating conduit.

The indoor units 31 are installed in units of floors, and each indoor unit 15 is connected to one of the individual blow ducts 3 to each room belonging to that floor via one air duct 36.
Leads to 3.

FIG. 1 shows an embodiment of the system of the present invention. An absorption chiller / heater 30 is a high-temperature regenerator 1 and a low-temperature regenerator for introducing an external heat source to heat an absorbing solution to generate refrigerant vapor. 2. A condenser 3 for cooling and condensing and liquefying the generated refrigerant vapor with cooling water, an evaporator 4 for dispersing and evaporating the liquid refrigerant and cooling the cold water with the latent heat of evaporation, and absorbing the evaporated refrigerant vapor into the solution. An absorber 5 for cooling with cooling water, a high-temperature heat exchanger 6 for exchanging heat between the concentrated solution and the diluent, a low-temperature heat exchanger 7, a solution circulation pump 8, a refrigerant pump 9, and a solution spray pump 13 are provided. Further, during heating, a cooling / heating switching valve 18 for guiding high-temperature refrigerant vapor from the high-temperature regenerator 1 to the evaporator 4 to heat the hot water flowing in the pipe, and a liquid refrigerant feed for sending the liquid refrigerant condensed by the evaporator 4 to a solution system. A control valve 19 and the like are operatively connected to a pipe, and a heat source input control device 10 is provided. Although not shown, an automatic bleeding system APU and an air storage tank ST for storing the gas are provided. During the cooling operation, particularly during the cooling operation when switching from the heating operation to the cooling operation, the bleeding system is driven to remove various substances that may interfere with absorption. In addition, there is a cooling water pipe system including a cooling water pipe 21 for passing cooling water through the heat transfer pipes of the absorber 5 and the condenser 3, a cooling tower CT having a fan 29, a cooling water pump 22, and the like. The water pipe system includes an electric drain valve 23, an automatic air release valve 24, a makeup water pipe 25, and a makeup water supply control motor-operated valve 2.
6, a float valve 27 and a liquid level switch 28 are provided. About 3 to 15 indoor units 31 are provided, and each indoor unit 31 is provided with a blower fan 42 and a heat exchange coil 43 through which cold and hot water flows. The cold and hot water from the evaporator 4 is supplied to each indoor unit 3 via a cold and hot water pipe 45 and a cold and hot water pipe 47.
It is sent to 1 and returns to the evaporator 4 through the cold / hot water pipe 45 again via the cold / hot water return pipe 46 and the cold / hot water pump 50. A part of the cold / hot water is returned through a cold / hot water bypass pipe 48 controlled by a bypass flow control valve 49, and a pipe from a cistern 51 is connected to an inlet of a pump 50. The cold / hot water flow control valve 44 controls the flow to the indoor unit 31.

As shown in FIG. 6, the controller 40 includes an operation switch 60, a cooling selection switch 63, a heating selection switch 64, an air volume setting switch 65, an indoor temperature setting switch 66, an operation state display panel 67, a speaker 68, and the like. And the indoor unit operation control panel 4
1 is connected. The operation control device 20 includes the signal transmission line 6
2 communicates with the control panel 41 of each indoor unit, and when a switch or the like is operated by any of the controllers 40, the signal is taken in through the corresponding control panel 41. Then, inputs from various detectors are also taken in, and the absorption chiller / heater 30 and various valves are controlled according to the operation signal and the input from the detector. In order to perform these operations, the operation control device 20 includes, for example, a microprocessor and a program for performing the various operations described above.

The operation of this embodiment will be described below. First, normal cooling operation will be described. In the controllers 40 of all the indoor units 31, the cooling selection switch 63 is selected, the air volume setting switch 65, the indoor temperature setting switch 6
6 is set and the operation switch 60 is turned on. This signal is supplied to the crossover wiring 61 via the indoor unit operation control panel 41,
The signal is sent to the operation control device 20 via the signal transmission line 62.
During the cooling operation, the cooling / heating switching valve 18 of the absorption chiller / heater 30 is closed, and the liquid refrigerant feed control valve 19 is also closed. In this state, the absorption refrigeration cycle operates as follows. That is, the high-temperature generator 1 heats the absorbing solution with the combustion heat of city gas, kerosene, etc., generates refrigerant vapor, and concentrates the solution. In the low-temperature regenerator 2, the refrigerant vapor is generated by heating the solution using the refrigerant vapor generated in the high-temperature regenerator 1 as a heat source.
Further concentrate. The refrigerant vapor generated by the low-temperature generator 2 and the refrigerant of the high-temperature generator 1 are guided to the condenser 3, cooled by cooling water and condensed and liquefied, and the liquid refrigerant is sent to the evaporator 4. In the evaporator 4, the liquid refrigerant is sprayed and evaporated, and the cold / hot water flowing in the pipe is cooled by the latent heat of evaporation. A part of the concentrated solution concentrated in the high-temperature regenerator passes through the high-temperature heat exchanger 6, joins with the concentrated solution from the low-temperature regenerator 2, is sent to the low-temperature heat exchanger 7, and is absorbed by the solution spray pump 13 into the absorber 5. Is sprayed on the tube group. In the absorber 5, the concentrated solution sprayed by the cooling water flowing in the pipe is cooled, and the refrigerant vapor generated in the evaporator 4 is guided to the absorber 5, where it is absorbed by the concentrated solution to produce a low-temperature dilute solution. Is done. The generated dilute solution is sent by the solution circulation pump 8 to the low-temperature heat exchanger 7 for exchanging heat between the concentrated solution and the dilute solution. High-temperature regenerator 1 via high-temperature heat exchanger 6 and solution circulation amount control valve 11
Sent to The absorption refrigeration cycle is configured as described above. Here, an aqueous solution of lithium bromide is used as the solution, and water is used as the refrigerant. In addition, in the absorber 5 and the condenser 3, the presence of the non-condensable gas liquefies the gaseous refrigerant, which significantly impairs the heat mass transfer performance.
A PU and an air storage tank ST (not shown) for storing the PU are provided, and are always operated during the cooling operation.

Next, the cooling water system will be described. The water in the cooling tower CT exchanges heat with the cooling water pump 22 through the heat transfer tube of the absorber 5 and then through the heat transfer tube of the condenser 3.
Water is returned to the cooling tower CT. Part of this water is evaporated by the air sent by the fan 29 and cooled. In order to supplement the evaporating water, the water blown for preventing the solid content concentration and the scattered water, etc., the tap water is supplied through the supply water pipe 25, the control valve 26, and the float valve 27. A liquid level switch 28 is provided to prevent the cooling water pump from running idle. Cooling water temperature sensor 58
When the cooling water temperature becomes lower than the specified value, the fan 29 is stopped by the control of the operation control device 20 to prevent the cooling water temperature from lowering. This control has the effect that absorption cooling operation can be performed over a wide range of outside air conditions.

Next, the cold / hot water system will be described. In this system, cold and hot water is filled with the cistern 51 without applying excessive pressure to the piping. The cold and hot water is guided to the heat transfer tube group of the evaporator 4 through the cold and hot water pipe 45 by the operation of the pump 50, where it is cooled by the above-described latent heat of vaporization of the liquid refrigerant. The cooled cold water is branched to each indoor unit 31 via a cold / hot water outflow pipe 47, guided to a heat exchange coil 43 via a cold / hot water flow control valve 44, and exchanges heat with air. The cold / hot water exiting the heat exchange coil 43 is collected in a cold / hot water return pipe 46 and forms a circulation path returning to the cold / hot water pump 50. When the value indicated by the cold / hot water temperature detector 53 provided at the outlet of the evaporator 4 falls below a specified temperature, the outlet temperature control for closing the heat input control valve 10 or the cold / hot water return temperature detector 5
When the temperature indicated by 2 falls below a specified temperature, the heat input control valve 1
The operation control device 20 controls the inlet temperature at the point where 0 is closed so that the cold water is supplied to the indoor unit 31 at a substantially constant cold water temperature. The control device 20 controls the bypass flow rate control valve 49, and the cold / hot water flow rate detector 5 provided in the cold / hot water pipe 45 when the cold / hot water flow rate control valve 44 is closed.
The bypass flow rate is controlled so that the value of 4 becomes a specified value. With such a configuration, it is possible to expect a high value of the flow rate of the cold / hot water in the pipe of the evaporator 4 and to increase the heat transfer coefficient, so that the heat exchange can be efficiently performed and the indoor unit 3 that requires operation is required.
Energy can be saved because cold and hot water can be circulated only in one.

Next, the air blowing system will be described. Outside air or indoor return air is sucked in through the filter by the intake port 39 and guided to the heat exchange coil 43 of the indoor unit 31 through the intake duct 38 to condense a part of moisture in the air to generate drain. As well as generating cool air. The drain is collected in a drain pan, guided to the outside of the building by a condensed water drain pipe (not shown), and discharged. The generated cool air is blown by the blower fan 42 into the blower duct 36 and the VAV unit 3.
4. The air is sent into the room through the outlet 32 through the outlet duct 33, and performs a cooling operation. The room air temperature is detected by the room thermostat 35. If the room air temperature is higher than the set temperature, the VAV unit 34 opens to increase the amount of air blown into the room. That is, when the VAV unit 34 is opened, the cool air easily passes, the pressure detected by an air pressure detector (not shown) provided in the air duct 36 decreases, and the rotation speed of the blower fan 42 is reduced to compensate for the pressure. Controlled to be increased. The rotation speed of the blower fan 42 is controlled by performing power frequency conversion by an inverter to control the motor rotation speed, and this rotation speed control is effective in reducing noise generation and saving energy. Moreover, comfortable air conditioning can be performed individually by controlling the room thermostat 35 for each room. The intake duct 38 and the air duct 36
Is provided, the indoor unit 31 can be disposed on a ceiling of a corridor or the like, and a machine room is not particularly required, so that space can be saved. Further, in order to introduce outside air, it is only necessary to branch off the middle of the intake duct 38 and take in outside air through a shutter and a filter. The shutter operation is performed by a ventilation operation switch 73 (FIG. 6). Thereby, the quality of the air conditioning can be improved. In this case, the intake of outside air can be automated by providing an indoor carbon dioxide concentration detector or an oxygen concentration detector and controlling the opening and closing of the shutter.

Next, in the cooling mode operation, one indoor unit 3
A case where the user instructs the first controller 40 to stop the operation will be described. At this time, the operation of the blower fan 42 is stopped by a command from the operation control panel 41 of the indoor unit 31, the cold / hot water flow control valve 44 is closed, and the cold / hot water flow to the heat exchange coil 43 is stopped. By doing so, the user feels that cooling has stopped quickly, without being irritated, reducing heat loss due to natural convection, and conserving energy. Also, under the control of the operation control device 20, the heat input control valve 10 of the absorption chiller / heater 30 is closed, the heating of the high temperature regenerator 1 is temporarily stopped, and after a certain period of time, the heating amount is controlled according to the normal chilled water temperature. Will be returned. This is because one indoor unit 31 is in charge of a relatively large load, and if the load suddenly disappears, a sudden drop in the chilled water temperature is prevented. In particular, the operation of one indoor unit 31 may be stopped at a time when the operation of the other indoor units 31 is also stopped. At this time, the indoor units are successively received the operation stop command. As a result, the temperature of the cold water drops, and when the control of the heat input is performed thereafter, the concentrated solution is present in the high-temperature regenerator 1 and the low-temperature regenerator 2 and is sent to the absorber 5 with a delay, so that the heat load is reduced. In the evaporator 4 where the temperature has decreased, the temperature of the chilled water and the temperature of the refrigerant decrease, and the risk of crystallization increases, and the possibility of safe operation increases. The safe operation against the cooling water temperature drop and the refrigerant temperature drop is the stop of the heat input and the stop of the solution spray pump 13 or the opening of the liquid coolant feed control valve 19, resulting in a loss of heat storage energy. Therefore, if the above-described control of the temporary stop of the heating is performed, such a safe operation is not performed, and the energy saving operation can be performed.

When all the indoor units 31 receive the cooling operation stop command during the cooling operation, the heat source control valve 10 of the absorption chiller / heater 30 is first closed by the control of the operation control unit 20 to stop the heat input. Then, the refrigerant feed control valve 19 and the solution bypass valve 12 are opened, and the liquid refrigerant in the evaporator 4 is blown, and the circulation amount of the solution increases to start the solution dilution.
When the refrigerant liquid level switch 14 detects that the liquid refrigerant in the evaporator 4 has dropped to a prescribed liquid level, and the detected value of the temperature or pressure of the absorption chiller / heater 30 by a detector (not shown) reaches a prescribed value, control is performed. Under the control of the device 20 and each control panel 41, the refrigerant feed control valve 19 and the solution bypass valve 12 are closed, the indoor unit blower fan 42 is stopped, and the chilled / heated water unit flow control valve 44 of the indoor unit 31 is closed, thereby controlling the bypass flow rate. When the valve 49 is opened to control the flow rate, the refrigerant pump 9, the cold / hot water pump 50, the cooling water pump 22, the solution circulation pump 8, and the solution spray pump 13 are stopped. As described above, only in the case of the complete stop, the operation of the indoor unit 31 is not immediately stopped, but is stopped while applying the load to make the solution concentration uniform. As described above, the controller 40 of the indoor unit 31
Not only the operation of the indoor unit 31 is controlled, but also the absorption chiller / heater 30, the cooling tower CT, the cooling water pump 22, the chilled / heated water pump 50, etc., are safely and reliably operated and stopped. No need for professional operation.

Next, the operation at the time of starting the cooling operation will be described. First, when an operation signal from the controller 40 of a certain indoor unit 31 is input, the operation control device 20 operates the cooling water pump 22, the cooling / heating water pump 50, and the fan 29 of the cooling tower CT. In addition, the cold / hot water flow control valve 4 of the indoor unit 31
4 is opened under the control of the control panel 41, and the blower fan 4
2 is also driven and blown into the room. On the other hand, at this time, whether the cooling water temperature is within a specified temperature range, or whether the temperature and flow rate of the cold and hot water are at specified values, is determined by the cooling water temperature sensor 58, the cold / hot water temperature detector 53, the cold / hot water return temperature detector 52, and the like. Checked. When the temperature of the cooling water is low, the CT fan 29 is stopped. Also, the operation is not performed when the flow rate of the cold / hot water is not higher than the specified flow rate. If these are OK,
Solution circulation pump 8, refrigerant pump 9, solution spray pump 1
3 is operated, the heat input control valve 10 is opened, and the high temperature regenerator 1 is opened.
Is heated. When the cooling water temperature is low, the solution bypass valve 12 is opened so that the liquid refrigerant is controlled so as to easily circulate through the high temperature regenerator 1. As described above, the cooling operation is started safely and reliably only by the user's operation command.

The above is the start-up operation of the cooling operation, the normal operation, and the operation when all or some of the indoor units are stopped. In any case, the cooling operation and the stop operation can be performed safely and efficiently only by the user's operation from inside the room.

Next, various operations of the heating operation will be described. It is assumed that a user selects the heating selection switch 64 and turns on the operation switch 60 with the controller 40 (FIG. 6) of a certain indoor unit 31. In this case, (1) the system is in cooling operation,
There are three cases: (2) the system is stopped in the cooling operation mode, and (3) the system has been switched to the heating operation. In the case of (1), the controller 40 informs the user that switching cannot be performed by a synthesized voice from the speaker 68 or by a character display from the operation display panel 67. (3)
Is the normal heating operation, which will be described later.
The case (2) is a case where switching from the cooling operation mode to the heating is possible, and the operation is as follows.

At this time, the user presses the heating selection switch 64 a plurality of times within a predetermined time by the controller 40 of one indoor unit 31. The signals of the plural times are calculated by the operation control device 20 and the operation display of the controller 40 of each indoor unit 31 is set to heating. Next, the cold / hot water pump 50, the solution circulation pump 8, and the refrigerant pump 9 are operated by the same controller 20, the heat source control valve 10 is opened, and the high temperature regenerator 1 is heated. Further, the cooling / heating switching valve 18 and the refrigerant feed control valve 19 are opened to mix the liquid refrigerant with the solution,
The generated steam is sent to the evaporator 4 via the switching valve 18 and exchanges heat with the hot water flowing in the pipe to condense and heat. The liquefied refrigerant is sent to the solution in the absorber 5 by the refrigerant pump 9.
In the meantime, the electric valve 23 for draining and draining the cooling water is opened and the electric valve 25 for makeup water is closed. The temperature of the cold or hot water is detected by the detector 52 or 53, and when the temperature exceeds a specified value, the control panel 41 operates the blower fan 42 of the indoor unit 31 and is introduced through the intake port 39 and the intake duct 38. The heated air is heated by the heat exchange coil 43 to become warm air, and warm air is supplied to the room through the filter 37, the air duct 36, the VAV unit 34, the air outlet duct 33, and the air outlet 32 to be heated. The air volume is determined by comparing the indoor thermostat 35 with the set temperature 66. In this way, switching from cooling to heating can be performed by the general user himself / herself only by operating the controller 40, which is comfortable for the user.

In the case of the above (3), that is, when the system is set to heating, the cooling / heating switching valve 18 and the refrigerant feed valve 19 are opened, and draining of the cooling water system is completed. Therefore, the cold / hot water pump 50, the solution circulation pump 8, and the refrigerant pump 9 are immediately operated by the operation command, the heat source control valve 10 is opened, and the high temperature regenerator 1 is heated.
Thereafter, heating is performed in the same manner as described above.

Finally, a case where the operation is switched from the heating operation to the cooling operation will be described. Controller 40 of a certain indoor unit 31
When the cooling signal is output from (4), the system is in the heating operation, (5) the system is stopped in the heating operation mode, (6)
There are three cases where the system has finished switching to cooling operation. In the case of (4), the controller 40 informs the user that switching cannot be performed. Also, (6)
Is a normal cooling operation, and the operation described above is performed.
The case (5) is a case where switching from heating to cooling is possible. In this case, when the cooling selection switch 63 of the controller 40 of the indoor unit 31 is turned on, the cooling operation is set to the indoor unit 31, but all the remaining indoor units 31 are still set to the heating operation. Then, when the cooling selection switch 63 is pressed a plurality of times within a predetermined time as in the case of switching from cooling to heating, the signals of the plurality of times are calculated by the operation control device 20 and the operation display of the controller 40 of each indoor unit 31 is displayed. Switching to cooling. When the cooling operation mode is set for all the indoor units in this way, the operation control device 20 first closes the electric drain valve 23 and opens the water supply control electric valve that has stopped the supply of water to the cooling tower CT, and opens the float valve. The cooling tower CT is filled with water via 27. When water is sufficiently supplied and the liquid level switch 28 is operated, the cooling water pump 22 is operated, and the cooling / heating switching valve 18 and the refrigerant feed control valve 19 in the cycle are switched to the cooling operation mode (closed). Next, when the operation of the chilled / hot water pump 50 and the operation of the absorption chilled / hot water heater 30 are sequentially started, at the same time, the shutoff valve,
Exhaust is performed by a chilled water driven aspirator via a solenoid valve and a check valve, and non-condensable gas in the machine is discharged. In this way, the cooling operation described at the beginning of the present embodiment can be started only by the user's controller operation, and efficient and safe operation without chilled water freezing and the like can be performed without operation by a specialized operator. I can do it.

The operation of the embodiment shown in FIG. 1 and its effects have been described above. The functions provided by the operation control device 20 and the controller 40 are not limited to those described above. For example, the cooling operation mode of the absorption chiller / heater 30 or the heating operation The operation control device 20 is provided with an operation mode switching function of the operation mode, and the other functions, specifically, the operation / stop function of the absorption chiller / heater 30 are provided by the controller 4.
The same effect can be obtained even if the value is set to 0. Also,
The absorption chiller / heater 30 used in the above embodiment employs the same piping, that is, a structure in which both cold water and hot water can be taken out from the cooling / heating water piping 45, so that the piping is simplified, and the cooling / heating mode is improved. There is an advantage that opening and closing control of the valve at the time of switching is simplified. Furthermore, in this embodiment, since the cold / hot water pipes 46 and 47 for the indoor unit 31 are piped in a reverse return manner, the pressure loss in the cold / hot water circulation system is made uniform.
Therefore, there is an advantage that a large amount of cold and hot water circulates in the heat exchange coils 43 of some of the indoor units 31 to generate vibrations and noises, and that the heat exchange coils 43 are not eroded by high-speed water flow. There is.

Hereinafter, another embodiment of the present invention will be described. FIG. 7 shows another embodiment of the present invention, which differs from the embodiment of FIG. 1 in the following points. That is, (1) the dilute solution generated in the absorber 5 is sent to the high-temperature heat exchanger 6 without being divided into two via the low-temperature heat exchanger 7, and is further transmitted through the solution circulation amount control valve 11. And heat-exchanges the concentrated solution generated in the high-temperature regenerator 1 with the dilute solution in the high-temperature heat exchanger 6.
And then further concentrated by sending to the low-temperature regenerator 2, and then returned to the absorber 5 by the solution spray pump 13 via the low-temperature heat exchanger 7.
0 is set at a place where the evaporator 4 of the absorption chiller / heater 30 exits. According to the above configuration, there is an advantage that the solution bypass valve 12 can be omitted, and the solution circulation path is changed, so that the solution spray pump 13 and the solution pump 13b can be controlled in rotation speed by an inverter or the like to control the circulation flow rate according to the operation state. Note that the air system in FIG. 7 is the same as that in FIG. 1 and is not shown.

FIG. 8 shows another embodiment of the present invention.
The following points are different from the embodiment of FIG. That is, the dilute solution generated in the absorber 5 is sent to the low-temperature regenerator 2 without being divided into two via the low-temperature heat exchanger 7 and concentrated by heating.
a, the high-temperature regenerator 1 via the high-temperature heat exchanger 6 and the control valve 11
And the concentrated solution generated in the high-temperature regenerator 1 is heat-exchanged with the dilute solution in the high-temperature heat exchanger 6, and returned to the absorber 5 by the solution spray pump 13 via the low-temperature heat exchanger 7. is there. According to the above configuration, there is an advantage of operating at a low pressure during the cooling operation. The air system in FIG. 8 is the same as that in FIG. 1 and is not shown.

FIG. 9 shows another embodiment of the present invention.
The configuration of the absorption chiller / heater 30 is the same as that of FIG. 1 and is simplified. This embodiment differs from the embodiment of FIG. 1 in the following points. That is, a cold / hot water buffer tank 55 is newly provided, and the cold / hot water pipe 45 forms a path for circulating the evaporator 4 of the absorption cold / hot water machine 30, the buffer tank 55, and the cold / hot water pump 50. Further, a secondary cold / hot water pump 56 is provided near the flow of the cold water cooled by the evaporator 4 of the buffer tank 55, and a plurality of indoor units are connected to the cold / hot water outgoing pipe 47 on the discharge side. The heat exchange coil 43 and the flow control valve 44 are connected, and the cold / hot water return pipe 46 is connected to the buffer tank 55 closer to the suction of the cold / hot water pump 50. With this arrangement, the cold / hot water bypass flow control valve 49 can be omitted,
Instead, the secondary cold / hot water pump 56 can be inverter-controlled to change the pump rotation speed and control the amount of water going back and forth in the cold / hot water, thereby saving energy. Further, since constant cold and hot water can be constantly circulated to the absorption cold and hot water machine 30 by the cold and hot water pump 50, the heat load can be known by detecting the inlet and outlet temperature of the cold and hot water. Accordingly, PID control for setting a target value of the cold / hot water temperature and controlling the heat input in accordance with the temperature and the actual temperature can be performed, so that there is an advantage that the control is simplified. Moreover, the buffer tank 55 has a plurality of indoor units 31.
In addition, in order to alleviate the temperature fluctuation of the hot and cold water due to the stoppage of the operation of the fan coil unit FC, there is an effect that the control range is widened and comfortable air conditioning is provided.

In this embodiment, three types of indoor units 31 and the arrangement of the fan coil units FC are disclosed. That is, (a) the return pipe 46 from the cold / hot water supply pipe 47 through the flow control valve 44 and the heat exchange coil 43 of the indoor unit 31
(Figure 10 upper left). At this time, each controller 40 is arranged in each room where the outlet 32 is installed, and also controls the VAV unit 34, and an operation signal is sent to the indoor unit operation control panel 41 to control the opening and closing of the flow control valve 44. At the same time, it is sent to the operation control panel 20 of the absorption chiller / heater system via the wiring 61 and the signal transmission line 62. With such a wiring configuration, the absorption chiller / heater system can be operated from each individual room, and the air conditioning control for each room can be individually handled.

(B) Flow control valve 4 from cold / hot water outgoing pipe 47
4, a system in which a plurality of fan coil units FC are branched and connected via branch pipes and connected to a cold / hot water return pipe 46. The operation signal of each fan coil unit FC is transmitted to the operation control panel 20 from the crossover wiring 61 via the fan coil unit group centralized control panel 81 by the fan coil unit operation switch 108 and receives the operation signal to receive the absorption chiller / heater. The system works. With this configuration, it is possible to meet the individual cooling and heating requirements of small rooms, and in the conventional cooling and heating multi-system using chlorofluorocarbon gas, the ventilation system necessary to prevent suffocation accidents at the time of refrigerant leakage is provided. Has the advantage that it can be omitted. If a large number of small fan coil units FC are also collected, the load can be set to the same capacity as the indoor unit 31, and the operation at an extremely small partial load is not required, which hinders the smooth operation of the absorption chiller / heater system. There is nothing.

(C) Flow control valve 4 from cold / hot water going pipe 47
4 and the return pipe 4 via the heat exchange coil 43 of the indoor unit 31.
System to return to 6. This system has been described with reference to FIG.

As described above, in any of the three types of device configurations, the operation signal from each indoor unit 31 or fan coil unit FC is transferred to the operation control panel 20 of the absorption chiller / heater system by the wiring 61 and the signal transmission. It is sent via the line 62 and immediately limits the heat input when the cooling operation is stopped, so there is no danger of crystal precipitation of the solution, etc., and safe and reliable operation control that can respond individually to air conditioning control in each room There is an effect that a water / water heater system can be provided.

FIG. 10 shows another embodiment of the present invention, in which the absorption chiller / heater 30 is simplified as in the embodiment shown in FIG. This embodiment differs from the embodiment of FIG. 1 in the following points. That is, the cold / hot water outgoing pipe 47 and the cold / hot water returning pipe 46 are connected at one end. Was connected to the other end of the pipe. When the plurality of secondary cold / hot water pumps 56a to 56c are not operated, the cold / hot water subjected to heat exchange in the evaporator 4 passes through the cold / hot water going pipe 47 and the vicinity of the joint 467, and the cold / hot water pump 50
Take the circulation route back to. With the configuration described above, only the water flow resistance of the piping is added to the cold / hot water pump 50, and FIG.
In this embodiment, a smaller pump may be used, and each secondary pump may be smaller. Therefore, there is an effect that the installation property is excellent. In addition, when the air conditioning request is issued by one indoor unit 31, if the secondary hot water pump (for example, 56a) of the system is operated, the cold / hot water can be circulated only to the system, so that the flow control valve 44 of each indoor unit 31 is set. There are advantages that can be omitted. As described above, there is an effect that energy can be saved by operating the secondary chilled / hot water pump corresponding to each air conditioning request.

FIG. 11 shows another embodiment of the present invention, which differs from the embodiment of FIG. 1 in the following points. That is, a steam pipe connecting the cooling / heating switching valve 18 and the evaporator 4 is branched into two branches, one of which is connected to the bottom of the bubble pump 59 and the other of which is connected to the evaporator 4 as it is. Bubble pump 59
Is provided with a liquid refrigerant conduit 78 communicating with the bottom of the evaporator 4, and the discharge portion thereof is configured to discharge the refrigerant liquid to the absorber 5. When the heating operation command is transmitted to the control panel 20 via the signal transmission line 62, the cooling / heating switching valve 1
8 is opened and the bubble pump 59 is operated by the power of the refrigerant vapor,
The liquid refrigerant in the liquid refrigerant tank below the evaporator 4 is discharged to the absorber 5 together with the refrigerant vapor. According to the present embodiment, there is no need to operate the refrigerant pump 9 during the heating operation, and there is an effect that the refrigerant pump 9 can be operated with small electric power. In addition, a plurality of fan coil units F
C and its operation switches 108 and a fan coil unit group centralized control panel 81 for centrally managing these switches were provided and communicated with the other indoor unit control panels 41 via the crossover signal lines 61. As a result, the operation signals from each fan coil unit FC are collected by the fan coil unit group centralized control panel 81, and the cooling / heating selection and operation signals to the control system control panel 20 of the chilled / hot water flow control valve 44 at the time of operation or stop are transmitted. Communication takes place. As described above, in this embodiment, since the fan coil unit group centralized control panel 81 that integrates the operation signal of the air conditioning request from the individual fan coil unit operation switch 108 is provided, it is necessary to input an excessive signal to the crossover signal line 61. Since there is no signal, the total signal amount can be reduced, and the whole system can be quickly controlled.

FIG. 12 shows another embodiment of the present invention, which differs from the embodiment of FIG. 11 in the following points. That is, the high temperature regenerator 1 includes a once-through boiler type regenerator 80 and a gas-liquid separator 79. With this configuration, the amount of retained solution can be reduced, and an absorption chiller / heater with high load response can be realized. The low-temperature regenerator 2 is of a liquid-filled type, and a condenser 3 is disposed above the low-temperature regenerator 2. As described above, since the solution levels of the high-temperature regenerator 1 and the low-temperature regenerator 2 were set at high positions,
The concentrated solution can be circulated to the absorber 5 due to the difference in the liquid head, so that the solution spray pump 13 can be omitted. In addition, a liquid refrigerant feed valve 19 for sending liquid refrigerant from the evaporator 4 to the absorber 5 is provided, and a liquid refrigerant tank of the evaporator 4 is provided with a second refrigerant liquid level switch 14 for preventing the refrigerant pump 9 from running idle. Two liquid refrigerant level switches 14a are disposed. When the cooling operation is stopped, the refrigerant feed valve 19 is opened to the liquid refrigerant liquid level detected by the liquid refrigerant liquid level switch 14a and the evaporator 4 sends the absorber 5
The liquid refrigerant is discharged to dilute the solution. This has the effect of preventing excessive dilution and shortening the cooling rise time at restart. If the liquid refrigerant liquid level is lower than the liquid level detected by the liquid refrigerant liquid level switch 14a when the operation is stopped, the solution is not diluted by discharging the liquid refrigerant, and the solution bypass valve 12 is opened. The solution in the regenerator 1 can be quickly diluted with a dilute solution, which has the effect of further reducing the dilution time. Although illustration of the air system is omitted in FIGS. 11 and 12, it is assumed that this portion is the same as FIG.

FIG. 13 shows another embodiment of the present invention, which differs from the embodiment of FIG. 12 in the following points. That is, the low-temperature regenerator 2 is a spray type and the operation of the indoor unit 31 is performed by the remote controller RC. Since the low-temperature regenerator 2 is a spray type, the amount of concentrated solution retained in the apparatus is small, and therefore, an absorption multi-system having a small heat capacity and excellent load response can be provided. Also, since the remote controller RC is used for the operation operation of the indoor unit, the controller 4 is mounted on the wall of the room.
There is no need to arrange 0, and there is an advantage that the room can be partitioned freely.

FIG. 14 shows another embodiment of the present invention, which differs from the embodiment of FIG. 13 in the following points. That is, the two absorption chiller / heaters 30a and 30b and the cooling towers CTa and CTb, the cooling water pumps 22a and 22b, and the chill / heat water pumps 50a and 50b are provided in a manner attached thereto. The cold / hot water pumps 50a, 50b are connected to the cold / hot water return pipe 46.
The cold / hot water is arranged to flow to the cold / hot water outgoing pipe 47 via the absorption cold / hot water heaters 30a and 30b, respectively. A plurality of secondary cold / hot water pumps 83 are connected to the cold / hot water pipe 47, the indoor unit 31 or a plurality of fan coil units FC are connected via the cold / hot water flow control valve 44, and the cold / hot water return pipe 46 is connected to the cold / hot water return pipe 46. The pipe is connected so that the water returns. The operation control panel 41 of each indoor unit 31 and the fan coil unit group centralized control panel 81 are connected by a crossover wiring 61, and the operation control of the number control panel 84 and each of the absorption chiller / heater 30a, 30b via a signal transmission line 62. The boards 20a and 20b are notified. According to this embodiment, it is possible to cope with a large-scale air conditioning system by using two absorption chillers / heaters.

Although the above embodiment is an example of a parallel flow type absorption heater, it can be applied to other types of absorption type devices such as a series flow type and a reverse flow type. Here, the series flow method is a method of regenerating in the path of the absorber → high temperature regenerator → low temperature regenerator → absorber, and the reverse flow method is the method of absorbing → low temperature regenerator → high temperature regenerator → absorber It is a way to play on the route. Also, low temperature,
In addition to the high-temperature regeneration example, the present invention can be applied to an example of a single regenerator.

[0044]

According to the present invention, the following effects can be obtained. (1) The absorption chiller / heater uses the same piping, that is, a structure that allows both cold water and hot water to be taken out from the cold / hot water piping, so the piping is simplified, and a valve for switching the cooling / heating mode is used. It is possible to realize an absorption type air conditioning system that can easily control the opening and closing of the system. (2) Cooling / heating water is produced by an absorption chiller / heater, and guided to a plurality of water-air heat exchange means for converting the cooling / heating water to cooled or heated air, and the air cooled or heated by the air system to each chamber. The operation of the absorption chiller / heater is started / stopped by a blower and a controller, and the operation mode of cooling or heating of the absorption chiller / heater is switched by the operation control means, so that the user is provided for each room (or floor). -Air conditioning can be performed according to the wishes of each room (or floor)
Since the operation of the absorption chiller / heater can be started / stopped from the beginning, there is no need to go to the absorption chiller / heater installation location outside the room to perform the operation / stop, which is convenient. (3) By arranging a plurality of cold / hot water secondary pumps, the number of operating units can be controlled according to the load of the indoor unit, and energy can be saved. (4) Since the heating is immediately stopped by a signal from the indoor unit during the cooling operation, energy can be saved, and the solution can be diluted quickly, so there is no danger of solution solidification.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of the present invention.

FIG. 2 is a sketch drawing showing the overall schematic configuration of the system of the present invention.

FIG. 3 is a system diagram of a conventional all-air system.

FIG. 4 is a system diagram of a conventional water-air type air conditioning system.

FIG. 5 is a system diagram of a conventional all-water air conditioning system.

FIG. 6 is an external view of an indoor unit controller.

FIG. 7 is a diagram showing another embodiment of the present invention.

FIG. 8 is a diagram showing another embodiment of the present invention.

FIG. 9 is a diagram showing another embodiment of the present invention.

FIG. 10 is a diagram showing another embodiment of the present invention.

FIG. 11 is a diagram showing another embodiment of the present invention.

FIG. 12 is a diagram showing another embodiment of the present invention.

FIG. 13 is a view showing another embodiment of the present invention.

FIG. 14 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High temperature regenerator 2 Low temperature regenerator 3 Condenser 4 Evaporator 5 Absorber 6 High temperature heat exchanger 7 Low temperature heat exchanger 8 Solution circulation pump 9 Refrigerant pump 10 Heat source input control valve 20 Operation control device 30 Absorption chiller / heater 31 Indoor Machine 32 outlet 34 air volume control device (VAV unit) 35 room thermostat 40 controller 41 indoor unit operation control panel 45 cold / hot water piping 46 cold / hot water return pipe 47 cold / hot water pipe 48 cold / hot water bypass pipe 49 bypass flow control valve 50 cold / hot water Pump 55 Cold / hot water buffer tank 56 Secondary cold / hot water pump 59 Bubble pump 61 Transition wiring 62 Signal transmission line 63 Cooling selection switch 64 Heating selection switch 65 Ventilation amount setting switch 66 Indoor temperature setting switch 67 Operating state display panel 68 Speaker 79 Gas liquid Separator 80 Once-through boiler type regenerator 81 Fan coil unit group centralized control panel 83 Secondary cooling water pump 89 Number of units control panel 108 Fan coil unit operation switch 467 Joint CT cooling tower FC Fan coil unit RC Remote controller

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Taisuke Kushima 502, Kandate-cho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. (72) Michihiko Aizawa 603, Kanda-cho, Tsuchiura-shi, Ibaraki Prefecture Tsuchiura, Hitachi, Ltd. Inside the factory (72) Inventor Tsuyoshi Nakao 603 Kandamachi, Tsuchiura-city, Ibaraki Pref. Inside the Tsuchiura factory, Hitachi, Ltd. (72) Inventor Yasuo Koseki 4026, Kuji-cho, Hitachi-shi, Ibaraki Pref. Person Kyoji Kono 4-6-1 Kanda Surugadai, Chiyoda-ku, Tokyo Inside Hitachi, Ltd. (56) References JP-A-62-73054 (JP, A) JP-A-56-940 (JP, A) JP-A 60-1985 33464 (JP, A) JP-A-4-340066 (JP, A) JP-A-58-20869 (JP, U) JP-A-57-68420 (JP, U) Field (Int.Cl. ⁶ , DB name) F25B 15/00 306 F24F 5/00 101 F24F 11/02 102

Claims (7)

(57) [Claims] 1. A plurality of indoor units having an absorption chiller / heater for heating or cooling circulating water, a piping system for circulating the circulating water, and a water / air heat exchange means for exchanging heat between the circulating water and air. Means for controlling operation / stop of the plurality of indoor units and switching between a cooling operation mode and a heating operation mode, and an operation / stop signal of the indoor unit from the operation unit. Means for enabling control of operation / stop of the absorption chiller / heater and switching between the cooling operation mode and the heating operation mode based on switching between the cooling operation mode and the heating operation mode. Air conditioning system. 2. The high-temperature regenerator for generating a vapor refrigerant by heating a dilute solution diluted with a refrigerant by a heat source, wherein the vapor refrigerant generated by the high-temperature regenerator passes through a first path. A low-temperature regenerator guided through the low-temperature regenerator, a condenser for condensing the vapor refrigerant generated in the low-temperature regenerator, and a refrigerant vapor generated in the high-temperature regenerator during heating and guided by the liquid refrigerant condensed in the condenser during cooling. An evaporator guided through a second path having a cooling / heating switching valve, an absorber formed of the same container as the evaporator and absorbing a refrigerant guided to the evaporator, and a dilute solution generated by the absorber And a fourth path having a refrigerant feed control valve capable of supplying a liquid refrigerant to the absorber according to a load change during cooling. 2. The multi-type absorption air conditioning system according to claim 1, . 3. A plurality of indoor units having an absorption chiller / heater for heating or cooling circulating water, a piping system for circulating the circulating water, and a water / air heat exchange means for exchanging heat between the circulating water and air. Means for controlling operation / stop of the plurality of indoor units and switching between a cooling operation mode and a heating operation mode, and an operation / stop signal of the indoor unit from the operation unit. Means for enabling the control of the operation / stop of the absorption chiller / heater and switching between the cooling operation mode and the heating operation mode based on the switching between the cooling operation mode and the heating operation mode; A multi-type absorption air conditioning system, comprising: a remote controller capable of transmitting a start / stop signal. 4. An absorption chiller / heater for heating or cooling circulating water flowing in a closed pipe, and an operation control device for controlling operation / stop of the absorption chiller / heater, and circulating from the absorption chiller / heater. In an outdoor unit for a multi-type absorption air conditioning system capable of supplying water to a plurality of indoor units, the operation control device operates / stops the absorption chiller / heater based on operation / stop signals from the plurality of indoor units. An outdoor unit for a multi-type absorption air-conditioning system, characterized in that the outdoor unit is configured to be controllable. 5. A high-temperature regenerator for heating a dilute solution diluted with a refrigerant to generate a vapor refrigerant, and the vapor refrigerant generated by the high-temperature regenerator passes through a first path. A guided low-temperature regenerator, a condenser for condensing a vapor refrigerant generated in the low-temperature regenerator, and a liquid refrigerant condensed in the condenser during cooling to be guided and switching between cooling and heating of the refrigerant vapor generated in the high-temperature regenerator during heating. An evaporator guided through a second path having a valve, an absorber formed of the same container as the evaporator, for absorbing a refrigerant guided to the evaporator, and a dilute solution generated in the absorber. The outdoor unit for a multi-type absorption air conditioning system according to claim 4, further comprising a third path leading to a high-temperature regenerator. 6. The outdoor unit for a multi-type absorption air conditioning system according to claim 5, further comprising a cistern connected to the evaporator via a pipe. 7. The absorption chiller / heater is provided with a fourth path having a refrigerant feed control valve capable of supplying a liquid refrigerant to the absorber according to a load change during cooling. 6. The outdoor unit of the multi-type absorption air conditioning system according to 5.