JP3189470B2 - Multi-type absorption air conditioning system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to an air conditioning system that uses the absorption chiller heater, multi-type absorption-type air conditioning system that can be easily cooling and heating of the driving operation in accordance with the wishes of the user to request a particular individual air conditioning about the.

[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) the total air system: a combination of air conditioner to the absorption chiller, each room in the building you distribute supplying cold air at cold duct. It is operated by operating the remote operation panel of the air conditioner and the remote operation panel of the absorption chiller / heater respectively. Cold wind can collectively air conditioning the whole room in the building to be supplied, but it takes time to become comfortable for them, not an energy-saving for the air conditioning to the room there is no need of air conditioning unattended.

(2) Water-air system: A plurality of air conditioners are dispersedly arranged in a building, and a main pipe of cold / hot water is provided from an absorption chiller / heater to an air conditioner . Luo distribute and supply the cold air to each room in the cold air duct. If the absorption chiller / heater is operating, the air conditioning of each air conditioner
By operating the Japanese machine operation switch, only the area can be air-conditioned, saving energy compared to 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. At that time absorption hot and cold water machine of the solution and the air conditioner is not in operation is over-concentrated in or crystal, because the problems such as can not be diluted operation takes place, not a can is selfish operation of the air conditioner.

[0005] (3) All water Method: fan coil units of a plurality within the building are arranged distributed, hot and cold water trunk pipe from the absorption chiller to, are connected via the hot and cold water branch pipe
You. Regardless of the air conditioning requirements of each room user,
It is necessary to operate the absorption chiller / heater first,
Fan coil units are of the absorption cold water machine has not been operated solution is over-concentrated or crystallized, because trouble such can not diluting operation occurs, wins <br/> hand of the operation of the fan coil units are that can not be.

As described above, the absorption chiller / heater is used as a heat source for central air conditioning as a supply source of cold water or hot water at a constant temperature. In addition, the absorption chiller is a need to switch the cycle of the heating operation and cooling operation, has been set up in advance either.

[0007]

In the above-described air conditioning system using the conventional absorption chiller / heater , the operation of the air conditioner in each room in the building and the operation of the absorption chiller / heater as the outdoor unit are different. It is necessary to operate the air conditioner, and it is necessary to turn on each operation switch when air conditioning, and even if a person in a room turns on the air conditioner operation switch because air conditioning is necessary, the operation switch of the absorption water heater If not turned on, there was a problem that air conditioning could not be performed. Also these switch operations needed a operation procedure for operating so as not to generate trouble, such as solution crystallization. That is, at the time of starting the cooling operation of the absorption chiller / heater, a period of time is required until a difference in the concentration of the solution occurs before the start of cooling, and at the time of stop, the concentrated solution is cooled by natural heat radiation to prevent crystallization. Dilution time is required. If these start or thermal load of the air conditioner or a fan coil unit or al in stopping performs operation in the absence, occurs problem such as can not dilute the operation or cause solution crystal as described above. Therefore, before operating the absorption chiller / heater, some or all of the air conditioner or fan coil
It was necessary to operate the knit so that cold and hot water was circulated. However, these operations are complicated,
General users were not allowed to drive.

[0008] In addition, switching of the cooling / heating operation mode also requires switching of the operation of the absorption chiller / heater main body. That is, it is an operation of switching the refrigerant cycle and draining the cooling water from the heat exchange equipment of the absorber and the condenser, and these operations are also operations that cannot be performed by general users. In addition, as described above, a part or all of the air conditioner or fan coil unit , regardless of the load requirement, is operated before the absorption chiller / heater is operated to circulate the chilled / hot water, so that the blast starting force, have I, such as in using the wasteful energy hot and cold water circulation power
You.

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 accordance with an air-conditioning request and a cooling / heating switching request from a plurality of rooms by a general user. to provide a multi-type absorption-type air conditioning systems that do not, such as requiring a cooling of the room without the automatically carried the load request a crystal prevention.

[0010]

The object of the present invention is to heat a dilute solution diluted with a refrigerant by a regenerator to generate refrigerant vapor,
At the time of cooling, the refrigerant vapor is cooled and condensed by a cooling means, and then evaporated by an evaporator to cool the cold and hot water,
During heating, the evaporator heats the cold / hot water with the refrigerant vapor to produce hot water, and the refrigerant after cooling or heating the cold / hot water with the evaporator is absorbed by the absorber into the concentrated solution generated when the refrigerant vapor is generated. An absorption chiller / heater configured to return to the generator after forming a dilute solution, a chiller / warm water system for guiding chilled / heated water cooled or heated by the chiller / heater, and cooling or heating the chilled / hot water from the chilled / heated water system. A plurality of water-air exchange means for converting the air into air, an air system for blowing air cooled or heated by the water-air heat exchange means to each chamber, or a water-air heat exchange means and an air blowing means integrally. By providing, it is achieved.

[0011] Preferably, the absorption chiller / heater is controlled.
The water / air heat exchange means and air system
Individually controlled indoor unit controller and water / water heater control panel
Collection that communicates bidirectionally with the
The first control panel between the middle control panel and the hot and cold water control panel and the central control panel
Communication means and between the indoor unit controller and the central control panel
It comprises the second communication means.

[0012]

Since liquid refrigerant is used in the absorption type water heater, even if the heat input is temporarily stopped when the load fluctuates, the cooling operation can be performed with the residual cooling capacity, and the load can be switched freely. Also, the operation of each unit of the outdoor unit at the time of starting / stopping or switching of cooling / heating is automated by the operation control device means, and the operation is connected to the operation control device from each outlet through the operation control device by a signal line, Since the operation can be performed from the centralized control panel, which is part of the operation control device, which is connected to all the indoor unit controllers, there is no need to worry about inoperability and solution crystal generation, and cooling / Heating operation becomes possible. Further, since the branch pipe is provided, a multi-type can be realized .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a schematic diagram of the entire system of the present invention. A cooling tower CT, an absorption chiller / heater 1 equipped with a cooling water pump and a chiller / heater pump, and the chilled / hot water sent from the absorption chiller / heater 1 through the chilled / hot water piping 3 reduce the temperature of the air taken in. It consists of an indoor unit 2 that adjusts and sends out. Each indoor unit 2 is controlled by an indoor unit controller 6 provided in each of the indoor units 2, and the air volume thereof is controlled by a fan 2A.
It is adjusted by controlling the number of revolutions.

The cold / hot water pipe 3 includes a main pipe 3A from the absorption type hot / cold water heater 1, a plurality of sub pipes 3C to a plurality of indoor units 2, a main pipe 3A and a plurality of sub pipes. And a branch pipe 3B connecting the path 3C to branch cold and hot water. Thereby, the chilled and heated water from one absorption chilled and heated water unit 1 is distributed to each indoor unit 2, and a multi air conditioning system can be configured. Further, the indoor unit 2 has a water-air heat exchange function and an air intake / outlet function. This is because the cold / hot water sent through the sub-line 3C is transferred to the heat exchange coil 2 of the indoor unit 2.
This is achieved by transferring the heat of the cold / hot water to the air through the inside of B through the air sucked by the fan 2A to the outside, and blowing the air into the room by the fan 2A. The pipeline 3 has a reciprocating pipeline.

In FIG. 1, one absorption type water heater 1 having a cooling tower CT, a cooling water pump (not shown), and a cold / hot water pump (not shown), a cold / hot water pipe 3, a heat exchange coil 2B, A plurality of indoor units 2 each having a fan 2A, a chiller / heater operation panel 4 for controlling the absorption chiller / heater 1, an indoor unit controller 6 for controlling one or more indoor units, and a chiller / heater A central control panel 5 that communicates with the operation panel by the communication means 7 and communicates with the indoor unit controller by the communication means 8, and a central operation panel 9 that communicates with the central control panel 5 by the communication means 12. And centralized control panel 5
And a temperature / humidity sensor 11 that sends an indoor temperature / humidity signal to the centralized control panel 5 by the communication means 14.

The operation will be described below. First, normal cooling /
The heating operation will be described.

The central control panel 9 is a control panel for controlling the entire equipment of the building provided with the air conditioning system of the present embodiment. The central control panel 9 sends a system start signal to the central control panel 5 to control the air conditioning system. Is in a standby state, in which all control panels and devices constituting the system are operable and stopped. In this state, when the indoor unit operation switch is turned on by the first one of the plurality of indoor unit controllers, the first one of the indoor units is set to the operating state by the indoor unit controller on the centralized control panel. The transmitted signal is transmitted, and the central control panel 5 sends a hot / cold water heater start signal to the hot / cold water heater control panel to start the hot / cold water heater. After startup, the chiller / heater detects the temperature at the outlet of the chiller / heater and automatically starts and stops.

Next, when the plurality of indoor units are stopped while the absorption chiller / heater is operating, and the indoor unit operation switch of the indoor unit controller of the last indoor unit is turned off,
The signal is transmitted to the central control panel 5 through the communication means 8.
Then, a cold / hot water machine stop signal is transmitted from the central control panel 5 to the cold / hot water machine control panel 4 via the communication means 7, and the cold / hot water machine is stopped regardless of the cold / hot water cold / hot water outlet temperature. When the system stop signal is transmitted from the central operation panel 9 to the central control panel 5 in a state where the water heater is stopped, the system is stopped.

Next, the operation of the chiller / heater when the chiller / heater stop signal is transmitted to the chiller / heater control panel 4 will be described.

FIG. 5 shows an embodiment of an absorption type water cooler / heater of the present invention. This chiller / heater has a high-temperature regenerator 25, a low-temperature regenerator 24, a burner 26 serving as a heating unit, and a cooling unit that cools the refrigerant vapor by cooling water during cooling. The condenser 23 for cooling and condensing, the cold and hot water is cooled by evaporating the condensed refrigerant, and the evaporator 21 for heating the cold and hot water by the refrigerant vapor during heating, and the cold or hot water is cooled or heated by the evaporator. The subsequent refrigerant is absorbed or mixed with the concentrated solution generated when the refrigerant vapor is generated by the absorber 22 to make a dilute solution, and then returned to the high-temperature regenerator and the low-temperature regenerator by the solution pump 28. .

During the cooling operation, when the chiller / heater stop signal is transmitted to the chiller / heater controller panel 4, the cooling water pump and the chiller / heater pump cooling tower of the chiller / heater are stopped immediately, and the burner 26 is stopped.
Extinguishes fire. In this state, since the concentrated solution is present in the chiller / heater, the solution pump 28 is operated for a certain period of time to dilute the solution so that no crystal is generated by cooling after the stoppage. At this time, when the refrigerant vapor is absorbed in the absorber 22, the pressure in the evaporator 21 decreases, and the cold and hot water stagnant due to the stop of the cold and hot water pump in the heat transfer tube 37 of the evaporator 21 is excessively cooled and frozen. Otherwise, the heat transfer tube may be damaged. Therefore, the refrigerant tank 31 at the bottom of the condenser 23
The refrigerant liquid accumulated during the cooling operation is opened by opening the refrigerant blow valve 30 by the chiller / heater stop signal.
By sending the concentrated solution in the absorber through the refrigerant blow pipe 32 to dilute the concentrated solution in the absorber 22 to deprive the refrigerant vapor absorbing ability, freezing of cold and hot water can be prevented. Further, since the cold / hot water pump and the cooling water pump are stopped immediately upon receiving the cold / hot water machine stop signal, energy is saved.

Next, switching of the cooling / heating operation mode will be described. In the embodiment of FIG. 1, the centralized control panel 5 has a cooling / heating changeover switch. When the cooling / heating switching switch is switched from cooling to heating or from heating to cooling, a cooling / heating switching signal is transmitted from the centralized control panel 5 to the water / water heater control panel 4. The chiller / heater is electrically operated by the cooling / heating switching signal,
It has a function of automatically switching the operation mode from cooling to heating or from heating to cooling, and the cooling / heating operation mode can be switched from the centralized control panel 5 with one touch.

The cooling / heating switching signal is transmitted from the centralized control panel 5 to the water / water heater control panel 4 and also to the indoor unit controller 6, and the indoor unit control mode built in the indoor unit controller 6 is changed from cooling to heating or from heating to cooling. Switch to

Next, control of the burner 26 will be described.

FIG. 6 is a diagram showing the relationship between the amount of heating for each position of the burner 26. The burner 26 has four positions of OFF (zero heating amount) L0, H1, H2,
The relationship between the heating amounts in each case is L0 <H1 <H2. Burner 26 is OFF when cooling, L0, H1
Take one of the three positions. At the time of heating, it takes one of OFF, L0 and H2. Switching between cooling and heating is automatically performed by a cooling / heating switching signal sent to the water / water heater control panel 4. The chiller / heater has means for detecting the outlet temperature of the chiller / heater, and the chiller / heater control panel 4 automatically controls the burner position corresponding to the outlet of the chiller / heater. Figures 7, 9
FIG. 4 is a diagram showing a relationship between a hot / cold water outlet temperature in cooling and heating and a burner position. As is clear from the figure, there are three types of setting of the hot / cold water outlet temperature corresponding to the burner position in each of the cooling and heating cases: "strong", "medium", and "weak". Even when the load on the indoor unit is extremely small, the operation of the chiller / heater can be continued by the L0 position of the burner, and the fluctuation width of the chiller / heater outlet temperature caused by the load change can be reduced.

A method of controlling the position of the burner 26 of the chiller / heater from the central control panel 5 in consideration of the load of the indoor unit will be described.

Whether each indoor unit is in the operating state or the stopped state is transmitted from the indoor unit controller to the centralized control panel 5. In the centralized control panel 5, the load factor Q of the indoor unit is determined based on the heat exchange capacity of each indoor unit registered in advance and the number of operating indoor units.
(%).

When Q becomes equal to or less than the preset value Q1, the centralized control panel 5 changes the cold / hot water outlet temperature setting to the hot / cold water heater control panel 4 so as to change the temperature range of the burner position H1 or H2 to cooling. Shifts to the higher side in the case of heating and to the lower side in the case of heating, and issues a signal for changing to the setting shown in FIG. 8 or FIG . Q is a preset value Q2 (Q1 ≤ Q
Becomes 2) above, the centralized control board 5 to chiller control panel 4, and returning the cold water outlet temperature setting, FIG. 7 (the heating is
A signal for returning to the setting shown in FIG. 9) is issued.

Therefore, when the load factor of the indoor unit is small, the chiller / heater is mainly operated only at the L0 burner position. Thus, instead of switching the burner to L0 after the detected temperature of the cold / hot water outlet gradually decreases when the load on the indoor unit decreases, instead of directly detecting the decrease in the load on the indoor unit, ,
The fluctuation range of the cold / hot water outlet temperature can be further reduced, and the phenomenon of freezing due to a decrease in the temperature of the cold / hot water in the case of cooling, the excessive cooling of the room in the case of cooling, and the excessively hot room in the case of heating can be avoided. In addition, the amount of heating heat of the burner is directly reduced according to the load factor in the room, so that more energy is saved.

Next, the dehumidifying operation will be described. The centralized control panel 5 receives signals of the indoor temperature and humidity from the temperature / humidity sensor 11 in the room where the centralized control panel 5 is installed via the communication means 14, and calculates the indoor relative humidity RH. still,
The temperature and humidity sensor 11 may be installed inside the centralized control panel 5. Further, the centralized control panel 5 is installed in a room for performing air conditioning. When the relative humidity RH in the room becomes larger than the preset value RH1 in the cooling operation mode, the centralized control panel 5 sets the set temperature at the outlet of the chilled / hot water machine with respect to the chilled / hot water machine control panel as compared with the normal cooling operation. For example, when t1 = 7 ° C. and t2 = 9 ° C. in FIG. 7, a command to change t1 to 5 ° C. and t2 to 7 ° C. is issued. At the same time, the centralized control panel 5 issues a command to the indoor unit controller 6 to reduce the rotation speed of the indoor unit fan 2A. As a result, the temperature of the air cooled in the indoor unit decreases, and moisture in the air is condensed on the surface of the heat exchange coil 2B inside the indoor unit to be removed, thereby providing indoor comfort by dehumidifying the room. There are advantages that can be done. When the relative humidity RH becomes lower than a preset value RH2 (RH1≥RH2), the central control panel 5 cancels the above-mentioned command.

The central control panel 5 has a manual dehumidification switch. When the manual dehumidification switch is on, the centralized control panel 5 automatically issues the dehumidification command or the dehumidification cancellation command based on the signal of the temperature and humidity sensor 11. When the manual dehumidification switch is off, the centralized control panel 5 does not issue a dehumidification command regardless of the signal of the temperature / humidity sensor 11. When the manual dehumidification switch is turned off during the dehumidification operation, the centralized control panel 5 cancels the dehumidification command.

When the temperature / humidity sensor 11 is not provided and the circuit for receiving the signal from the temperature / humidity sensor 11 of the centralized control panel 5 is short-circuited, the centralized control panel 5 issues a dehumidification command by turning on the manual dehumidification switch, and the manual dehumidification is performed. Release the dehumidification command when the switch is turned off.

The temperature / humidity sensor 11 is installed in an air-conditioned room and senses the temperature and humidity in the room. Instead, the temperature and humidity sensor 11 is installed outdoors or in the middle of an outside air introduction port or outside air introduction duct of an air conditioning system in a building. Temperature and humidity may be detected. At this time, the central control panel 5 issues a dehumidification operation command regardless of the temperature and humidity in the room where the air conditioning is performed. Even if the temperature and humidity of the outside air are the conditions of the dehumidifying operation,
When the indoor user does not need the dehumidifying operation, the user operates the indoor unit controller 6 to change the rotation speed of the indoor unit fan 2A from the low rotation speed to the middle rotation speed or the high rotation speed. When the set value of the room temperature is lower than a predetermined value, the centralized control panel 5 detects the operation by a signal from the indoor unit controller 6 and cancels the dehumidification command. Also,
The dehumidifying operation can also be canceled by turning off the manual dehumidifying switch.

Next, the operation of changing the setting of the cold / hot water outlet temperature of the cold / hot water machine according to the outside air temperature will be described.

The centralized control panel 5 receives an external air temperature signal from an external air temperature sensor 10 provided separately via a communication means 13. When the outside air temperature T becomes lower than the preset temperature T1 in the cooling operation mode, the central control panel 5
7 shows the pattern of the chilled / hot water outlet temperature setting for the chilled / hot water heater control panel 4 from “strong” to “medium” according to the “strong”, “medium”, and “weak” shown in FIG. From "medium" to "weak,"
"Weak" issues a command to change it to "weak". The pattern for setting the temperature of the cold / hot water outlet is determined in advance by the central control
The central control panel 5 issues an initial setting command to the cold / hot water control panel 4.

The outside air temperature T is set to a preset temperature T.
When it is higher than 2 (T2 ≧ T1), the centralized control panel 5 issues a command to the chiller / heater controller panel 4 to restore the chilled / hot water outlet temperature setting. Thus, when the outside air temperature is low in the cooling operation, the set temperature of the cold / hot water is automatically increased, and the energy of the water / hot water machine can be saved.

Next, the operation management function of the centralized control panel 5 of the entire system will be described.

The centralized control panel 5 receives a signal indicating the operation / stop / failure state of each indoor unit from the indoor unit controller 6 via the communication means 8, and displays the signal on the display unit of the centralized control panel 5. Further, the central control panel 5 receives a signal indicating the operation / stop / failure state of the chiller / heater from the chiller / heater controller 4 via the communication means 7 and displays the signal on the display section of the central controller 5. indicate.

Further, the central control panel 5 is provided with
And a manual operation function for manually issuing an operation / stop signal to each indoor unit controller 6.

The centralized control panel 5 has a schedule timer for sending a command to stop the operation of the chiller / heater and each indoor unit according to a schedule preset in each indoor unit controller 6 and the chiller / heater control panel 4.

With the above functions, the centralized control panel 5 can manage the operation of the entire air conditioning system including the indoor units and the chiller / heater, thereby improving the management efficiency.

FIG. 2 is a view showing another embodiment of the present invention. In the embodiment shown in FIG. 1, a plurality of chiller / heater units 1 are provided for one centralized control panel 5, and Provide cold and hot water collecting pipes 3D and 3E in the cold and hot water pipes on the inlet and outlet sides,
Communication with the plurality of water / water heater control panels 4 via the communication means 6 and communication with the centralized control panel 5 via the communication means 7A;
The point that the number control panel 15 is provided is different from the embodiment of FIG. 1, and the other configuration is the same.

The operation of this embodiment will be described below. First, normal cooling / heating operation will be described.

The central control panel 9 is a control panel for controlling the entire equipment of the building provided with the air conditioning system of the present embodiment. By transmitting a system start signal from the central control panel 9 to the central control panel 5, this air conditioning system can be used. In a standby state, all control panels and devices constituting the system are operable and stopped. In this state, when the indoor unit operation switch is turned on by the first indoor unit controller among all the indoor unit controllers, the first indoor unit is operated by the indoor unit controller on the centralized control panel 5. Is transmitted from the centralized control panel 5 to the number-of-units control panel 15 to send a water / water heater start signal. In the number control panel 15, a chill / hot water start signal is sent from the number control panel 15 to the chill / water heater control panel 4 of the chiller / heater selected according to the built-in operation chiller / heater selection algorithm, and the chiller / heater is started. . After start-up, the chiller / heater detects the temperature at the outlet of the chiller / heater of the hot / cold water and automatically starts and stops.

Next, when the plurality of indoor units are stopped while the chiller / heater is operating and the indoor unit operation switch of the indoor unit controller of the last indoor unit is turned off, the signal is output. It is transmitted to the central control panel 5 via the communication means 8. Then, a chiller / heater stop signal is sent from the central control panel 5 to the number controller 15, and a chiller / heater stop signal is sent from the number controller 15 to the chiller controller 4. Shut down regardless of the outlet temperature of the hot and cold water machine.

When the system stop signal is transmitted from the central operation panel 9 to the central control panel 5 in a state where the water heater is stopped, the system is stopped.

The operation of the chiller / heater 1 when the chiller / heater stop signal is transmitted to the chiller / heater control panel 4 has already been described.

Next, switching of the cooling / heating operation mode will be described. In the embodiment of FIG. 2, the centralized control panel 5 has a cooling / heating switching switch. When the cooling / heating switch is switched from cooling to heating or from heating to cooling, a cooling / heating switching signal is transmitted from the centralized control panel 5 to the number control panel 15, and the cooling / heating switching signal is transmitted from the number control panel 15 to all the cooling / heating water control panels 4. Is transmitted. The chiller / heater has a function of automatically switching the operation mode from cooling to heating or from heating to cooling by electrical means in response to the cooling / heating switching signal. You can switch modes.

The cooling / heating switching signal is transmitted from the centralized control panel 5 to the water / water heater control panel 4 and also to the indoor unit controller 6, and the indoor unit control mode built in the indoor unit controller 6 is changed from cooling to heating or from heating to cooling. Switch to

The control of the burner 26 has already been described.

Next, a description will be given of a method of determining how many of the plurality of chiller / hot water heaters 1 are to be operated and how many are to be operated.

Whether each indoor unit is in the operating state or the stopped state is transmitted from the indoor unit controller to the central control panel 5. In the centralized control panel 5, the load factor Q of the indoor unit is determined based on the heat exchange capacity of each indoor unit registered in advance and the number of operating indoor units.
(%).

The central control panel 5 has an algorithm for determining the number of operating chillers / heaters corresponding to the Q, and sends a signal of the determined number to the number control panel 15. The number control panel that receives the operating number signal uses the rotating number command to control the number of operating units and the rotation function for equalizing the operating time of each chiller / heater unit.
The chiller / heater to be operated is determined, and an operation stop signal is issued to each chiller / heater control panel.

When one chiller / heater is operated, the position of the burner 26 of the chiller / heater is adjusted by taking the load of the indoor unit into consideration as described above for one of the units.
Perform more controlled operation.

The algorithm for determining the number of operating chillers / hot-water units may be provided in a unit control panel.

FIG. 11 is an example of an algorithm for determining the number of operating chillers / heaters. The operating number is determined according to the graph of FIG. 11 according to the number of chillers / heaters. The indoor unit load factor Q
Is 0%, the number of hot and cold water heaters operated is one considering the preliminary operation by the schedule timer.

Another example of the algorithm for determining the number of operating chillers will be described.

The number control panel 15 has a sensor for detecting the temperature of the cold / hot water collecting pipe 3D on the inlet side of the cold / hot water machine.

First, the central control panel 5 determines the number N of chilled and heated water heaters according to the algorithm shown in FIG. 11, and issues a command to the number control panel 15 to operate the N units from the central control panel 5. The number control panel 15 compares the number N of operation commands with the number N0 of chilled and heated water heaters currently in operation. (1) When N = N0, the current operation state is continued.

(2) When N> N0, the number of operating chillers / heaters is increased from N0 to N. After a lapse of a certain time (T0 minutes) after switching to N-unit operation, another algorithm (not disclosed) is performed based on the cold / hot water temperature of the cold / hot water collecting pipe on the inlet side of the cold / hot water machine regardless of the indoor unit load factor. ) To determine the number of operating units.

(3) When N <N0 The number of operating chiller / water heaters is changed from N0 to N. After a lapse of a fixed time (T0 minutes) after switching to N units, regardless of the indoor unit load factor, The number of operating units is determined by another algorithm (not disclosed) based on the cold / hot water temperature of the cold / hot water collecting pipe on the inlet side of the system.

(4) If the number of operating units is switched from N0 to N and the same number of operating commands comes from the centralized control panel 5 within T0 minutes, the timer for counting the time after switching the number of operating units is not cleared. , And continue counting.

Incidentally, a sensor for detecting the temperature of the cold / hot water collecting pipe of the cold / hot water machine may be provided in the cold / hot water collecting pipe 3E on the outlet side of the cold / hot water machine.

By determining the number of operating chiller / water heaters in consideration of the load factor of the indoor unit described above, the number of operating chiller / water heaters is determined directly reflecting the increase / decrease of the load on the indoor unit. It is possible to reduce the fluctuation range of the chilled / hot water outlet temperature of the machine, achieve the comfort of indoor air conditioning, and to save energy of the chilled / hot water machine.

Next, the dehumidifying operation will be described. The centralized control panel 5 receives signals of the temperature and humidity of the room from the temperature / humidity sensor 11 in the room where the centralized control panel 5 is installed via the communication means 14 and calculates the relative humidity RH of the room. still,
The temperature and humidity sensor 11 may be installed inside the centralized control panel 5. Further, the centralized control panel 5 is installed in a room for performing air conditioning. When the relative humidity RH in the room becomes larger than the preset value RH1 in the cooling operation mode, the centralized control panel 5 sends the cold / hot water at the outlet of the hot / cold water machine to the hot / cold water machine control panel via the number control panel 15. The set temperature is lower than the normal cooling operation. For example, in FIG.
If t2 = 9 ° C., a command is issued to change t1 to 5 ° C. and t2 to 7 ° C. At the same time, the central control panel 5 is
, An instruction is issued to lower the rotation speed of the indoor unit fan 2A. As a result, the temperature of the air cooled in the indoor unit decreases, and the moisture in the air is reduced by the heat exchange coil 2B inside the indoor unit.
There is an advantage that indoor comfort can be provided by removing dew on the surface and removing the moisture inside the room. Relative humidity R
When H becomes lower than a preset value RH2 (RH1 ≧ RH2), the centralized control panel 5 releases the above-mentioned command to the water / water heater control panel 4 via the number control panel 15.

The central control panel 5 has a manual dehumidification switch. When the manual dehumidification switch is on, the centralized control panel 5 automatically issues the dehumidification command or the dehumidification cancellation command based on the signal of the temperature and humidity sensor 11. When the manual dehumidification switch is off, the centralized control panel 5 does not issue a dehumidification command regardless of the signal of the temperature / humidity sensor 11. When the manual dehumidification switch is turned off during the dehumidification operation, the centralized control panel 5 cancels the dehumidification command.

If the temperature / humidity sensor 11 is not provided and the circuit for receiving the signal from the temperature / humidity sensor 11 of the centralized control panel 5 is short-circuited, the centralized control panel 5 issues a dehumidification command by turning on the manual dehumidification switch, and the manual dehumidification is performed. Release the dehumidification command when the switch is turned off.

The temperature / humidity sensor 11 is installed in an air-conditioned room to sense the temperature and humidity in the room. Instead, the temperature and humidity sensor 11 is installed outdoors or in the middle of an outside air inlet of an air conditioner in a building, or in the middle of an outside air introduction duct. Temperature and humidity may be detected. At this time, the central control panel 5 issues a dehumidification operation command regardless of the temperature and humidity in the room where the air conditioning is performed. Even if the temperature and humidity of the outside air are the conditions of the dehumidifying operation,
When the indoor user does not need the dehumidifying operation, the user operates the indoor unit controller 6 to change the rotation speed of the indoor unit fan 2A from the low rotation speed to the middle rotation speed or the high rotation speed. When the set value of the room temperature is lower than a predetermined value, the centralized control panel 5 detects the operation by a signal from the indoor unit controller 6 and cancels the dehumidification command. Also,
The dehumidifying operation can also be canceled by turning off the manual dehumidifying switch.

Next, the operation of changing the setting of the outlet temperature of the hot / cold water of the absorption type hot / cold water heater according to the outside air temperature will be described.

The centralized control panel 5 receives an external air temperature signal from an external air temperature sensor 10 provided separately via the communication means 13. When the outside air temperature T becomes lower than the preset temperature T1 in the cooling operation mode, the central control panel 5
For the chiller / heater control panel 4 via the unit control panel 15
The pattern for setting the outlet temperature of the chilled / hot water of the chilled / hot water machine is changed from “strong” to “medium” according to “strong”, “medium” and “weak” shown in FIG.
A command is issued to change from "middle" to "weak" and "weak" to "weak". Note that the pattern of the hot / cold water outlet temperature setting is previously selected by a manual switch of the central control panel 5, and an initial setting command is issued from the central control panel 5 to the cold / hot water control panel via the number control panel 15. .

The outside air temperature T is set to a preset temperature T.
When the temperature is higher than 2 (T2 ≧ T1), the centralized control panel 5 issues a command to the chilled / hot water machine control panel 4 via the number control panel 15 to restore the chilled / hot water outlet temperature setting. This allows
When the outside air temperature is low in the cooling operation, the set temperature of the cold / hot water automatically rises, and the energy of the water / hot water machine can be saved.

Next, the operation management function of the centralized control panel 5 of the entire system will be described.

The centralized control panel 5 receives a signal indicating the operation / stop / failure state of each indoor unit from the indoor unit controller 6 via the communication means 8 and displays the signal on the display unit of the centralized control panel 5. The centralized control panel 5 collects signals indicating the operation / stop / failure state of the chiller / heater from the chiller / heater control panel 4 and the details of the failure in the number control panel 15 and then receives the signals via the communication means 7A. Is displayed on the display unit of the central control panel 5.

Further, the centralized control panel 5 has a manual operation function of manually issuing an operation / stop signal to the chiller / heater control panel 4 via the number control panel 15 and each indoor unit controller 6.

The central control panel 5 has a schedule timer for sending a command to stop the operation of the chiller / heater and each indoor unit according to a schedule preset in each indoor unit controller 6 and the number control panel 15.

With the above functions, the centralized control panel 5 can manage the operation of the entire air-conditioning system including the indoor units and the chiller / hot-water units, thereby improving management efficiency.

Next, using the embodiment shown in FIGS. 1 and 2
The hot / cold water heater will be described. FIG. 5 is a sectional view of the main body shell of the water heater / heater. The evaporator 21 and the absorber 22 arranged in parallel in one shell and the high-temperature regenerator 25 arranged independently in parallel with the evaporator 21 and the absorber 22 are provided with a condenser 23 and a low-temperature regenerator 24. Are arranged in parallel above the evaporator 21 and the absorber 22, the refrigerant vapor generated in the high-temperature regenerator 25 heats the solution in the low-temperature regenerator to generate refrigerant vapor, and the concentrated solution is Returning from the low-temperature regenerator, the concentrated solution coming back from the high-temperature regenerator 25 is merged with the concentrated solution, and the ejector 44 sprays the spray tree 4 of the absorbing solution.
When the pressure is raised to 1, the position head of the solution in the low-temperature regenerator becomes large, the solution easily returns, and there is an effect of preventing poor circulation of the solution, which tends to occur when the load is small.

Further, a partition plate 45 (see FIG. 5) forming a wall for partitioning the evaporator 21 and the condenser 23 and the absorber 22 and the low-temperature regenerator 24 in the shell is formed in a U-shape. It is bent and also serves as a wall that partitions the condenser 23 and the low-temperature regenerator 24. The inside of the low-temperature regenerator 24 is heated by the steam generated by the high-temperature regenerator 25 and is in an overheated state. When the wall partitioning from the condenser 23 is a single plate, the wall is also excessively heated. The heat transfer tube 40 of the condenser
The refrigerant liquid that has been cooled and condensed in this way touches the wall and evaporates again, impeding the cooling effect of the condenser. However, in the structure of the present invention, a space is provided between the plates by bending them into a U-shape, so that the heat insulation is achieved. By solving the problem,
In addition, the number of parts is reduced by also serving as a plate that partitions the evaporator 21 and the condenser 23 and the absorber 22 and the low-temperature regenerator 24.

FIG. 12 shows another embodiment of the absorption chiller / heater of the present invention. The embodiment shown in the drawing is different from the embodiment of FIG. 4 in the configuration of the bubble pump. Generally, as shown in FIG. 4, a bubble pump is a U-sealing pipe 36 which is a passage through which refrigerant vapor generated in a regenerator during heating flows from a condenser to an evaporator.
And a bubble pump that condenses the refrigerant vapor flowing into the evaporator into a refrigerant liquid in the evaporator, and transfers the refrigerant liquid accumulated at the bottom of the evaporator to the absorber along with the refrigerant vapor by the fluid force of the refrigerant vapor. The lift main pipe 29, the branch pipe between the U seal pipe 36 and the bubble pump lift main pipe 29, and the bubble pump are constituted by a bubble pump suction pipe 48 for sucking the refrigerant liquid. In the embodiment shown in FIG. The U-seal pipe 36 is used to transfer the refrigerant liquid to the absorber together with the refrigerant vapor, and the U-seal pipe 36 and the bubble pump lift main pipe 29 are also used, so that the piping system Simplification and low cost can be realized.

Next, the control for performing the burner ignition operation during the cooling operation of the absorption chiller / heater of this embodiment will be described. As described above, for example, when the cold / hot water outlet temperature setting is "strong", the burner is turned off at the cold water outlet temperature t1, and the burner starts the ignition operation at the cold water outlet temperature t2. Whether the burner is turned on or off is controlled by a chilled water outlet thermoswitch that is turned on and off according to the chilled water outlet temperature detected by the chilled water outlet temperature detecting means of the chilled / hot water machine. As shown in FIG. 13, when the chilled water outlet temperature rises and reaches the temperature t2 in a state where the burner is extinguished (not burning), the chilled water outlet thermo switch is turned on and the burner enters an ignition operation. The chilled water outlet thermo switch is ignited after being pre-purged for a time T0 from being turned on. The cooling water pump, the refrigerant pump and the solution pump are operated for dilution for a certain period of time after the chilled water outlet thermo switch is turned off and the burner is extinguished, and then stopped. After the dilution operation is completed,
When the mode switch is turned on and the burner starts preparging, the cooling water pump, the refrigerant pump and the solution pump are simultaneously activated. If the chilled water outlet thermo switch is turned on and the burner starts pre-purging before the dilution operation is completed,
The cooling water pump, the refrigerant pump and the solution pump are continuously operated. The setting value of the chilled water outlet thermo switch is the time T1 (T1> T0) after the chilled water outlet thermo switch is turned on.
After a lapse of time, the temperature shifts to a higher temperature for a time T2, and turns off at the cold water outlet temperature t2 and turns on at the cold water outlet temperature t3. After the elapse of the time T2, the set value of the cold water outlet thermo switch returns to the original value. When at least the chilled water outlet thermo switch is turned on and the burner starts pre-purge, the cooling water pump, the refrigerant pump and the solution pump are operated. Depending on the concentration of the solution, the cooling capacity is generated in the water heater even if the burner is not ignited. When the load of the chiller / heater is large, the chilled water temperature once increased by this cooling capacity is reduced to the temperature t2 again.
Therefore, as shown in FIG. 13, the burner shifts the set value of the chilled water outlet thermoswitch to a higher temperature during the time T2, but the chilled water outlet temperature depends on the chilled water outlet temperature. Between the outlet temperature t1 and the cold water outlet temperature t2,
Ignition (combustion state) and fire extinguishing (non-combustion state) are repeated. When the load of the chiller are small, Ba - Na is Puripa - the start of the di, cooling water pump, the refrigerant pump and solution pump is operated by the cooling capacity in the chiller occurs, as shown in FIG. 1 4 Then, the temperature of the chilled water once increased to the temperature t2 or more decreases to the temperature t2 or less during the elapsed time (T1 + T2). When the time T1 elapses, the set value of the chilled water outlet thermo switch shifts during the time T2, and turns off at the chilled water outlet temperature t2 and turns on at the chilled water outlet temperature t3, so that the chilled water outlet thermo switch is turned off. Once burned, the burner is extinguished immediately. Even if the burner is extinguished, the cooling water pump, the refrigerant pump and the solution pump perform a dilution operation for a certain period of time, and a cooling capacity corresponding to the concentration of the solution in the absorber is generated in the chiller / heater to cool the chilled water. When the chilled water outlet temperature rises again, the same operation is repeated. If the cooling water pump, refrigerant pump and solution pump are operated in a state where the burner is not ignited, the concentration of the solution in the absorber will eventually decrease, and the cooling capacity will not be generated. , The cold water outlet thermo switch does not turn off and the burner continues to ignite. As described above, according to the control when the burner ignition operation of the present invention is performed, the fluctuation range of the cold / hot water outlet temperature can be further reduced by directly detecting the decrease in the load of the indoor unit instead of obtaining. However, it is possible to avoid the phenomenon of freezing due to a decrease in the temperature of the cold / hot water in the case of cooling, the excessive cooling of the room in the case of cooling, and the excessively hot room in the case of heating. In addition, the amount of heating heat of the burner is directly reduced according to the load factor in the room, so that more energy is saved.

[0082]

According to the present invention, an absorption type chiller / heater and a plurality of indoor units having water / air heat and exchange means are connected by a chiller / heater, and chilled / hot water from the chiller / heater is exchanged by a heat exchanger. Since it was converted to air and discharged into each room, a multi-type absorption air conditioning system was realized.

Further, according to the present invention, the absorption chiller / heater and the indoor unit having the water-air heat exchange means are connected by a chiller / heater system, and the absorption chiller / heater and the chiller / heater circulation pump are operated by the operation signal from the controller of the indoor unit. The following effects can be achieved by automatically driving the vehicle.

(A) The indoor unit and the absorption chiller / heater are immediately operated in response to a request for air conditioning on the indoor side, so there is no need to run around the building to turn on the operation switch.

(B) As soon as all the indoor units are stopped, the heating of the chiller / heater is stopped, and the cold / hot water pump, the cooling water pump, and the cooling tower are stopped. This saves energy and is convenient.

(C) Since the cooling / heating operation can be switched by the cooling / heating changeover switch of the central control panel, the operation mode of the absorption chiller / heater is switched to the installation type of the absorption chiller / heater to switch the cooling / heating water. There is no need to operate and it is easy to use.

(D) Since the capacity control and the number control of the chiller / heater considering the load on the indoor side are performed, the comfort of the air conditioner and the energy saving of the chiller / heater can be achieved.

(E) Since the setting of the cold / hot water temperature is automatically shifted according to the outside air temperature, energy saving of the absorption-type hot / cold water heater can be achieved.

(F) The comfort of air conditioning is achieved by the dehumidifying operation.

(G) The centralized control panel can unify the operation management of the indoor unit and the absorption type chiller / heater, thereby improving the management efficiency.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of the entire system of the present invention.

FIG. 4 is a view showing one embodiment of an absorption type water cooler / heater of the present invention.

FIG. 5 is a sectional view of a shell of the absorption-type water heater / heater of the present invention.

FIG. 6 is an explanatory diagram of a burner position.

FIG. 7 is an explanatory diagram of burner control (cooling).

FIG. 8 is an explanatory diagram of burner control (cooling).

FIG. 9 is an explanatory diagram of burner control (heating).

FIG. 10 is an explanatory diagram of burner control (heating).

FIG. 11 is an explanatory diagram of an algorithm for determining the number of operating water absorption and cooling water heaters.

FIG. 12 is a view showing another embodiment of the absorption-type hot / cold water heater of the present invention.

FIG. 13 is an explanatory diagram of control during burner ignition operation of the water heater / heater (large load).

FIG. 14 is an explanatory diagram of control during burner ignition operation of the water heater / heater (light load).

[Explanation of symbols]

1. Absorption chiller / heater, 2: Indoor unit, 2A: fan, 2B
... heat exchange coil, 2C ... electric valve, 3 ... cold and hot water piping, 3A
... Main pipeline, 3B ... Sub pipeline, 3C ... Branch pipe, 3D ... Cool and hot water collecting pipe, 3E ... Cool and hot water collecting pipe, 4 ... Cooling and hot water machine control panel, 5
... Centralized control panel, 6 ... Indoor unit controller, 7 ... Communication means, 7A ... Communication means, 8 ... Communication means, 9 ... Central control panel,
DESCRIPTION OF SYMBOLS 10 ... Outside temperature sensor, 11 ... Temperature / humidity sensor, 12 ... Communication means, 13 ... Communication means, 14 ... Communication means, 15 ... Number control panel, 16 ... Communication means, 17 ... Cold / hot water bypass valve, 2
DESCRIPTION OF SYMBOLS 1 ... Evaporator, 22 ... Absorber, 23 ... Condenser, 24 ... Low temperature regenerator, 25 ... High temperature regenerator, 26 ... Burner, 27 ... Refrigerant pump, 28 ... Solution pump, 29 ... Bubble pump lift main pipe, 30 ... Refrigerant blow valve, 31 refrigerant tank, 32 refrigerant blow pipe, 33 separator, 34 low temperature solution heat exchange, 35 high temperature solution heat exchange, 36 U seal tube, 37 evaporator heat transfer tube, 38 absorption Heat transfer tube section, 39: Low temperature regenerator heat transfer tube section, 40: Condenser heat transfer tube section, 41: Absorber spray tree, 42 ... Evaporator spray tree, 43 ... Refrigerant liquid return pipe, 44 ... Ejector, 45 ... Partition Board, 46 ...
Float valve, 47: refrigerant pump discharge pipe, 48: bubble pump suction pipe, 101: air conditioner remote operation control panel, 1
02: Remote control panel, 103: AHU operation switch, 10
4: cold / hot air duct, 105: cold / hot water main pipe, 106:
Cold and hot water branch pipe, CT: cooling tower.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Michihiko Aizawa 603 Kandamachi, Tsuchiura-shi, Ibaraki Hitachi, Ltd. Tsuchiura Plant (72) Inventor Tomohisa Ouchi 502-Kamidate-cho, Tsuchiura-shi, Ibaraki Hitachi, Ltd. In the laboratory (56) References JP-A-60-33464 (JP, A) JP-A-1-19664 (JP, A) JP-A-55-95073 (JP, A) JP-A 64-10047 (JP, A) JP-A-4-340066 (JP, A) JP-A-5-60346 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 15/00 306 F24F 5/00 101

Claims (8)

(57) [Claims] A dilute solution diluted with a refrigerant is heated by a regenerator.
To generate refrigerant vapor, and to cool the refrigerant vapor during cooling.
And then evaporate with an evaporator.
Cools and cools water, and turns it into refrigerant vapor in the evaporator during heating.
More cold and hot water is heated to make hot water, and the cold and hot water is
Generates refrigerant after cooling or heating when refrigerant vapor is generated
Absorbed or mixed with the concentrated solution with the absorber to make a dilute solution
An absorption chiller / heater that returns to the regenerator and the absorption chiller
Cold / hot water that guides cold / hot water cooled or heated by a water heater
Heat exchange between the system, cold and hot water from this cold and hot water system and air
Multiple water-air heat exchange into cooled or heated air
Means and cooling or heating in said water-air heat exchange means
Equipped with an air system that blows compressed air into each room
In the IP absorption type air conditioning system, the absorption chiller / heater is
A chiller / heater control panel to be controlled, and the plurality of water / air heat exchangers
Multiple indoor unit controls for individually controlling stages and air systems
And at least one of the plurality of indoor unit controllers.
A centralized control panel that controls two indoor unit controllers,
Bidirectional communication between the chiller / heater control panel and the centralized control panel
A first communication unit for communicating with the indoor unit controller;
A second communication means for two-way communication between the central control panels;
Multi-type absorption air conditioning system with 2. The central control panel according to claim 1, wherein all the indoor units are stopped.
The first one of the plurality of indoor unit controllers
An indoor unit operation command is input from the indoor unit controller
Then, the operation of the absorption chiller / heater is controlled by the chiller / heater control panel.
The signal of claim 1, wherein the signal is transmitted.
Chi type absorption air conditioning system. 3. The centralized control panel has all rooms except one.
When the internal unit is stopped, the last indoor unit
The indoor unit operation stop from the controlling indoor unit controller
When a stop command is input, the absorption of the water
Transmits the stop signal of the water heater / cooler
The multi-type absorption air conditioning system according to claim 1. 4. A dilute solution diluted with a refrigerant is heated by a regenerator.
To generate refrigerant vapor, and to cool the refrigerant vapor during cooling.
And then evaporate with an evaporator.
Cools and cools water, and turns it into refrigerant vapor in the evaporator during heating.
More cold and hot water is heated to make hot water, and the cold and hot water is
Generates refrigerant after cooling or heating when refrigerant vapor is generated
Absorbed or mixed with the concentrated solution with the absorber to make a dilute solution
An absorption chiller / heater that returns to the regenerator and the absorption chiller
Cold / hot water that guides cold / hot water cooled or heated by a water heater
Heat exchange between the system, cold and hot water from this cold and hot water system and air
Multiple water-air heat exchange into cooled or heated air
Means for cooling or heating in said water-air heat exchange means
Equipped with an air system that blows compressed air into each room
In the IP absorption type air conditioning system, the absorption chiller / heater is
A chiller / heater control panel to be controlled, and the plurality of water / air heat exchangers
Multiple indoor unit controls for individually controlling stages and air systems
And at least one of the plurality of indoor unit controllers.
Also has a centralized control panel that controls two indoor unit controllers.
Cooling operation of the absorption type chiller / heater is provided in this central control panel.
Mode switch that switches between the heating mode and the heating operation mode.
When the cooling / heating switch is switched, the centralized control
A cooling / heating switching command is issued from the control panel to the water / water heater control panel,
The operation mode of the absorption chiller / heater is automatically controlled by electric means.
Multi-type absorption type sky characterized by dynamic switching
Tone system. 5. The central control panel according to claim 1, further comprising :
Has at least one temperature and humidity sensor to detect humidity and humidity.
In the cooling operation mode, the humidity is set to a predetermined value.
When it exceeds, the centralized control panel contacts the indoor unit controller.
Command to reduce the rotation speed of the fan provided in the indoor unit.
And set the outlet of cold and hot water in the control panel of the hot and cold water machine.
The temperature is lower than the preset temperature for normal cooling operation.
5. An instruction to issue a command is issued.
2. A multi-type absorption air conditioning system according to item 1. 6. The centralized control panel is controlled by the centralized control panel.
Operation of all the indoor units related to the indoor unit controller
The regenerator determines the load factor of the indoor unit from the
The stage has a burner, and the heating amount of this burner is Hi, L
o, OFF (stop) can be switched to three stages, Lo is
The heating amount is less than Hi, and the load factor of the indoor unit is
When the temperature falls below a predetermined value, the burner is turned off.
The centralized control panel sends a signal to operate at Lo or OFF.
2. An output to a cooling / heating machine.
4. The multi-type absorption air conditioning system according to 4. 7. An outside air temperature sensor for detecting an outside air temperature is provided.
The central control panel controls the outside air temperature during the cooling operation mode.
The outside temperature detected by the temperature sensor is higher than the preset temperature.
When the temperature also decreases, the set temperature of the cold water increases, and from this state
When the outside air temperature rises above a preset temperature,
A command to return the constant temperature to the original set temperature is controlled by the chiller / heater.
5. The data is transmitted to a board.
Matil type absorption air conditioning system. 8. The indoor unit controller according to claim 1, wherein :
Signals indicating the operation or stop of each indoor unit controlled by the
And a signal indicating the failure status of each indoor unit to the central control panel.
The chiller / heater control panel operates the absorption chiller / heater.
Sends signals indicating run, stop and failure to the centralized control panel
The centralized control panel controls the indoor unit controller and the cooling unit.
Display means for displaying information transmitted from the water heater control panel;
Have a schedule timer for absorption chiller / heater
The multi-type suction device according to claim 1 or 4, wherein
Receiving air conditioning system.