JP2994124B2 - Absorption cooling / heating system and start-up method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling / heating system using an absorption chiller / heater, and more particularly to an absorption cooling / heating system capable of turning on / off an absorption chiller / heater freely from an indoor unit and a method of starting the system.

[0002]

2. Description of the Related Art As a prior art of the present invention, Japanese Patent Application Laid-Open
18864. In this prior art, when the operation start time on the indoor load side is known, the timer is controlled in advance to start heating the regenerator so that cooling can be performed at the load operation start time.

[0003]

In the above prior art, when the operation start time of the indoor load is known,
Although there is an advantage that heating and cooling can be started immediately when room air conditioning is required, if you do not know in advance whether cooling or heating is required during the interim period, use an absorption chiller / heater wasted. There was a drawback that cooling and heating could not be started immediately when room air conditioning was desired.

Accordingly, an object of the present invention is to provide an absorption air-conditioning system and an activation method thereof that can start air-conditioning quickly when air-conditioning is required even when it is not known whether air-conditioning is required in advance, such as during an interim period. To provide.

[0005]

In order to achieve the above object, the present invention provides a storage unit for storing a scheduled operation time zone and a reference temperature of one day in an absorption chiller / heater; A central control device including a control unit for controlling the operation of the absorption chiller / heater based on the stored information;
A remote controller that enables control is provided on the indoor side, and a temperature sensor for detecting indoor and / or outdoor temperature is provided. The temperature information from the temperature sensor has a predetermined relationship with a reference temperature within a scheduled operation time zone. Is satisfied, the absorption chiller / heater is configured to start the absorption chiller / heater and perform the reference operation even if there is no input of an ON signal from the remote controller.

In this system, the reference operation of the absorption chiller / heater is required, that is, the temperature of the chilled / hot water, the concentration of the absorption liquid, etc. are reached in advance in the steady operation state before the operation of the indoor unit is started. The operation is performed by a combination of the scheduled operation time zone, the reference temperature, and the actual temperature information.

For this reason, even when it is not known whether or not air conditioning is required in advance, it is possible to always perform a proper preparation operation and to quickly obtain the necessary air conditioning capacity at the time of starting air conditioning. The convenience of ON-OFF control from the inside can be improved. In addition, useless driving can be avoided as much as possible, and energy can be saved.

In such a system, the reference temperature is set to be lower or higher by a predetermined width than the temperature at which the necessity of air conditioning is felt on average, depending on whether cooling or heating is performed. If the preparation operation of the absorption chiller / heater is performed when the reference temperature is reached within the scheduled operation time zone, the preparation operation can be made more accurate.

Further, in this case, if the scheduled operation time zone is set to start a predetermined time earlier than the scheduled start time of the operation of the indoor unit, the necessary air conditioning capacity can be immediately drawn even from the scheduled start time of the operation of the indoor unit. Become like

[0010] Further, regarding the system as described above,
The reference temperature is set to a temperature at which the necessity of air conditioning is felt on average, and the temperature after a certain time estimated from the temperature from the temperature sensor at a certain time and the rate of temperature change thereafter reaches the reference temperature within the scheduled operation time zone In such a case, the eligibility of the preparation operation can be further improved by performing the preparation operation of the absorption chiller / heater.

Furthermore, in addition to the above-described variable control, fixed control according to the scheduled operation time zone is also possible, and if both these controls can be switched and used, the use is further improved. I do.

[0012]

An embodiment of the present invention will be described below with reference to FIG. First, the outline of the configuration of the absorption cooling and heating system according to the present invention will be described. 1 is a high-temperature regenerator for heating the dilute solution to generate and separate the refrigerant vapor, 2 is a burner for heating the high-temperature regenerator, and 3 is a refrigerant vapor for heating the dilute solution with the refrigerant vapor from the high-temperature regenerator 1. Low-temperature regenerator 4 generates and separates refrigerant vapor generated in high-temperature regenerator 1 and exchanges heat with a dilute solution in low-temperature regenerator to generate refrigerant vapor from the dilute solution. Tube, 5 is a solution spraying device in the low-temperature regenerator 3, 6 is a condenser for condensing the refrigerant vapor generated in the low-temperature regenerator 3, and 7 is a cooling water flowing inside to take heat from the refrigerant vapor. A condensing heat transfer tube for condensing the refrigerant, 8 a throttle provided in the middle of a pipe for sending the liquid refrigerant condensed in the heat transfer tube 4 to the condenser 6, 9 a pipe for sending the liquid refrigerant condensed in the condenser to the evaporator 11, 10 is a throttle provided in the middle of the pipe 9, 12 circulates cold water inside, A heat transfer tube for exchanging heat with the liquid refrigerant in the generator 11 to evaporate the refrigerant, 13 is a refrigerant dispersing device for dispersing the liquid refrigerant to the heat transfer tube 12, and 14 is for dispersing the liquid refrigerant collected at the bottom of the evaporator 11. A refrigerant pump for sending to the device 13; a float valve 15 provided in the middle of a pipe connecting the refrigerant pump 14 and the refrigerant dispersion device 13 to adjust the opening degree according to the liquid level of the refrigerant collected at the bottom of the evaporator 11;
16 is an absorber for absorbing the refrigerant vapor in the concentrated solution returned from the high-temperature regenerator 1 and the low-temperature regenerator 3, and 17 is a cooling water flowing inside to cool the solution in the absorber 16 and absorb the refrigerant vapor into the solution. A heat transfer tube, 18 is a solution spraying device for spraying the concentrated solution returned from the high temperature regenerator 1 and the low temperature regenerator 3 to the heat transfer tube 17, 19 is a solution tube connecting the low temperature regenerator 21 and the solution spraying device 18, 20 Is a solution pump for sending the solution collected at the bottom of the absorber 16 to the high-temperature regenerator 1 and the low-temperature regenerator 3. Reference numeral 21 is a dilute solution sent from the absorber 16 to the high-temperature regenerator 1 and the low-temperature regenerator 3. Unit 1 and low temperature regenerator 3
A low-temperature heat exchanger that exchanges heat with the concentrated solution returned from
Reference numeral 22 denotes a high-temperature heat exchanger for exchanging heat between the dilute solution sent from the low-temperature heat exchanger 21 to the high-temperature regenerator 1 and the concentrated solution returned from the high-temperature regenerator 1, and 23 denotes a heat transfer tube 17 and a heat transfer tube 7.
Cooling water pump for sending cooling water to the heat transfer tube 12
A hot / cold water pump for circulating the cold water cooled in step 2 to the indoor unit; 25, an opening / closing valve provided in the middle of a pipe 26 connecting the gas phase of the condenser 6 and the gas phase of the evaporator 11; Float valve 15 for piping connecting pump 14 and refrigerant distribution device 13
This is an on-off valve provided in the middle of a pipe 28 connecting the solution pipe 19 and the downstream side of the pipe.

Reference numerals 101a, 101b, and 101c denote indoor units for performing air conditioning in the room with cold and hot water sent from a cold and hot water pump 24, 102a, 102b, and 102c denote remote controllers provided in the room, 103a, 103b, and 1c.
03c is a temperature sensor for measuring the temperature of the room, 104 is a temperature sensor for measuring the temperature of the outside air, 105 is a temperature sensor for measuring the temperature of cold and hot water supplied to the indoor unit, and 106 is a temperature sensor for the absorption chilled and heated water unit and the indoor unit. A central control unit for controlling the absorption cooling and heating system, 107 is an input / output unit for taking information from the absorption cooling and heating system into the central control unit 106 and outputting a control signal from the central control unit 106; 108 is an input / output unit A control unit for performing a control operation based on information from the storage unit 107 and the storage unit 109 to generate a control signal, and a storage unit 109 for storing information for performing control.

Next, the operation of the system in a steady state during the cooling operation will be described. During the cooling operation, the central control device 106 controls the valves 25 and 27 to be closed. In the high temperature regenerator 1, the solution is heated and boiled by the burner 2 to generate a refrigerant vapor. The generated refrigerant vapor is sent to the low temperature regenerator 3 and condensed in the heat transfer tube 4, and then sent to the condenser 6 through the throttle 8. The heat of condensation at this time heats the solution sprayed from the solution spraying device 5 and flowing down the outside of the heat transfer tube 4 to generate refrigerant vapor again. The generated refrigerant vapor is sent to the condenser 6, cooled and cooled by the cooling water, and condenses with the refrigerant from the high-temperature regenerator. On the other hand, the concentrated solution generated by condensing refrigerant vapor in the high-temperature regenerator 1 exchanges heat with the dilute solution from the absorber in the high-temperature heat exchanger 22 to lower the temperature, and the low-temperature regenerator 3 generates refrigerant vapor. And concentrate with the concentrated solution. The combined concentrated solution exchanges heat with the dilute solution from the absorber 16 in the low-temperature heat exchanger 21 to further lower the temperature, and is sent to the solution spraying device 18 in the absorber 16 to be sprayed into the absorber 16. . The sprayed concentrated solution is transferred to the heat transfer tube 17.
The refrigerant vapor from the evaporator 5 is absorbed while being cooled by the cooling water flowing therein, so that the concentration is reduced, and the solution becomes a dilute solution and is accumulated at the bottom of the absorber 16. On the other hand, the liquid refrigerant in the condenser 6 flows into the evaporator 11 via the pipe 9 and the throttle 10. In the evaporator 11, the liquid refrigerant is sent to the refrigerant dispersion device 13 by the refrigerant pump 14 through the float valve 15 and is dispersed on the heat transfer tube 12 in the evaporator 11, and exchanges heat with cold water flowing in the heat transfer tube. It evaporates, and as a result, the latent heat of evaporation is removed from the cold water to obtain a cooling action. The evaporated refrigerant is supplied to the absorber 16
To the heat transfer tube 17
Absorbed by the concentrated solution flowing down, the concentrated solution becomes a dilute solution. The heat absorbed at this time is cooled by the cooling water flowing through the heat transfer tube 17 by the cooling water pump 23. The solution stored at the bottom of the absorber 16 is sent to a low-temperature heat exchanger 21 by a solution pump 20 and then partially passes through a high-temperature heat exchanger 22 and a flow control mechanism (not shown). Sent to 1,
The remainder is sent to the low-temperature regenerator 3 and sprayed from the spraying device 5. The cold water cooled by the heat transfer tube 12 is supplied to the cold water pump 2.
4, the air is branched and sent to the indoor units 101a, 101b, and 101c. After the respective rooms are cooled and the temperature is increased, they merge again and return to the evaporator 11.

The above is the operation of the system in a steady state. However, even if the above operation is started from the state where the absorption chiller / heater is stopped, the temperature and concentration of the solution are low, so Cannot demonstrate cooling capacity. So next,
A control method of the system at the time of starting the cooling operation will be described with reference to FIGS. FIG. 2 is a graph showing a daily cooling operation schedule, that is, a scheduled operation time zone and a change in room temperature. FIG. 3 is a flowchart illustrating a control method at the start of the cooling operation.

In the cooling operation schedule shown in FIG. 2, t1 is the cooling operation start time, and t2 is the cooling operation end time. Assuming that the time required from the start of the operation of the absorption chiller / heater to the time when the cooling capacity can be exhibited is approximately Δt, it is necessary to start the absorption chiller / heater at time t3 which is Δt earlier than the cooling operation start time t1. There is. Therefore, the storage unit 109 in the central control unit 106 stores the time t3 and the time t2.
Is stored as the operation schedule. t1, and therefore t3 and t2 are not constant every day, but are times determined from, for example, the working days and working hours of the company or office, or the working days and business hours of stores and the like. Further, Tc is a reference temperature set as an indoor temperature at which the need for air conditioning is felt on average, and is stored in the storage unit 109 in the central control device 106. At time t3, the temperature signals of the temperature sensors 103a, 103b, 103c are
The maximum value of these temperatures is sent to the control unit 108 via the input / output unit 107 of the central control unit 106, and as shown in case 1 of FIG. When it is higher than the set value Tc, the operation of the absorption chiller / heater is started immediately.
A control signal is issued from the control unit via the input / output unit.

That is, the chilled water pump 24, the chilled water pump 23, the refrigerant pump 14, and the solution pump 20 are operated, and the burner 2 is ignited. The solution is circulated between the high-temperature regenerator 1 and the low-temperature regenerator 3 and the absorber 16 and is heated by the high-temperature regenerator 1 and the low-temperature regenerator 3 to generate a refrigerant vapor. Go. After the elapse of the time Δt, both the temperature and the concentration of the solution have almost reached a steady operation state, and the operation of the indoor unit is immediately changed to the ready state where the cooling power of the full power can be exhibited. Therefore, the remote controllers 102a, 102b, 102c of the indoor units
Is turned on, and when the fan of the indoor unit starts operating, the cooling capacity can be immediately obtained. Indoor unit remote controllers 102a, 102
If the chilled water temperature reaches the set value Tl in a state where none of the switches b and 102c are turned on, the burner 2, the chilled water pump 24, the chilled water pump 23, the refrigerant pump 14, and the solution pump 20 are stopped and wait. State. Here, Tl is a set value of the chilled water temperature, and the central control device 1
06 is stored in the storage unit 109. Furthermore, if there is no ON signal from the indoor unit even after a certain period of time, the cooling water pump 24, the cooling water pump 23, the refrigerant pump 14, and the solution pump 20 are started to perform the dilution operation.

In case 2 of FIG. 2, at time t3, none of the indicated values of the temperature sensors 103a, 103b, 103c have reached the set temperature Tc, and at this time, unless there is an ON signal from the indoor side. The operation of the absorption chiller / heater is not started. At time t4, the temperature sensor 103a,
103b or 103c reaches the set temperature Tc,
At this point, the preparation operation of the absorption chiller / heater is started as described above. After about Δt time, the indoor unit can be operated for cooling, and the remote controller 102 of the indoor unit can be used.
When any one of the switches a, 102b, and 102c is turned on, the cooling capacity can be immediately provided.

If the absorption chiller / heater is operating at time t2, a dilution operation for stopping the absorption chiller / heater is started. If the cooling load has disappeared before time t2, the dilution operation is performed at that time, and the absorption chiller / heater stops.

In the embodiment described above, the operation of the absorption chiller / heater is started when any one of the temperature sensors 103a, 103b, 103c reaches the reference temperature Tc. It takes.
Therefore, the reference temperature Tc is lower than the temperature at which the need for cooling is felt on average by a predetermined width, specifically, by an amount corresponding to the temperature that rises during the time Δt required to complete the preparatory operation of the absorption chiller / heater. Should be set to. Further, if the user can change this temperature setting, it is possible to adjust the time from the start of operation of the absorption chiller / heater to the time when cooling becomes necessary.

The reference temperature Tc is set at a temperature at which cooling is required, and the temperature sensors 103a, 103b, 103c
The temperature after Δt time may be estimated from the current temperature instruction value and the rate of change thereafter, and control may be performed such that the operation of the absorption refrigerator is started when the temperature reaches the reference temperature Tc. In this case, irrespective of the change in the pattern of temperature rise, the cooling operation can be prepared exactly at the time when cooling is required, and both usability and energy saving can be improved. Further, when estimating the temperature after Δt time from the current temperature instruction value and the rate of change thereof, the estimation accuracy is further improved by estimating information including the time of the season and the day. Fuzzy inference or the like may be used for this estimation.

In the above description, the temperature sensor 103
Although it is determined whether or not to operate the water chiller / heater by detecting the indoor temperatures a, 103b, and 103c, the outside air temperature of the temperature sensor 104 may be used instead of the indoor temperature.
Alternatively, the determination may be made from both the room temperature and the outside air temperature.

The variable control method described above is mainly used when it is not known in advance whether cooling is required in an intermediate period or the like. In accordance with the above, fixed control can be performed by a timer, and two control methods may be switched and used depending on the season.

In the embodiment described above, during operation of the absorption chiller / heater before cooling, the chilled water pump 24, the chilled water pump 23, the refrigerant pump 14, and the solution pump 20 are operated, and the burner 2 is ignited. However, the cooling water pump 24 and the refrigerant pump 14 may be stopped, and the cooling water pump 23 and the solution pump 20 may be operated so that the burner 2 is ignited. In this case, the chilled water temperature cannot be used to determine whether or not the cooling operation has become possible after the concentration of the solution has been completed, so the means for measuring the concentration of the solution or the temperature and pressure of the solution are measured. Means are required. When such control is performed,
Since the cold water and the refrigerant are not circulated, there is an advantage that the time for concentrating the solution is shortened, and the energy saving and the usability are improved.

Next, the steady operation of the system during the heating operation will be described. During the heating operation, the valve 25 and the valve 27 are open, the cooling water pump 23 stops, and the cooling water does not flow through the heat transfer pipe 17 in the absorber 16 and the heat transfer pipe 7 in the condenser 6. In the high temperature regenerator 1, the solution is heated and boiled by the burner 2 to generate a refrigerant vapor. The generated refrigerant vapor is sent to the low temperature regenerator 3 and condensed in the heat transfer tube 4, and then sent to the condenser 6 through the throttle 8. The heat of condensation at this time is heated from the solution sprayed from the solution spraying device 5 and flowing down the outside of the heat transfer tube 4 to generate refrigerant vapor again. The generated refrigerant vapor is sent to the condenser 6, but does not condense and liquefy because the cooling water is not circulated in the tube group provided in the condenser 4. 11 is sent. The liquid refrigerant from the high-temperature regenerator is supplied to the pipe 9 and the throttle 1
It flows into the evaporator 11 via 0. In the evaporator 11, the refrigerant vapor from the condenser 6 exchanges heat with the hot water flowing in the heat transfer tube 12 to condense and liquefy, and the hot water is heated by the latent heat of condensation at this time to generate a heating capacity. The condensed and liquefied liquid refrigerant joins with the liquid refrigerant from the condenser 6 at the bottom of the evaporator 11, and is floated by the refrigerant pump 14, the float valve 15, the pipe 28, and the valve 27.
Is sent to the solution tube 19 via On the other hand, high temperature regenerator 1
The concentrated solution generated by condensing the refrigerant vapor by heat exchange with the dilute solution from the absorber in the high-temperature heat exchanger 22 to lower the temperature,
Merges with the concentrated solution from the low temperature regenerator 3. The combined concentrated solution exchanges heat with the dilute solution from the absorber 1 in the low-temperature heat exchanger 21 to further lower the temperature, and is sent to the solution pipe 19. At this time, the concentrated solution joins the liquid refrigerant sent via the pipe 28 and the valve 27 to reduce the concentration, and then the solution spraying device 1
8 and sprayed into the absorber 16. This dilute solution is stored at the bottom of the absorber 16 and sent to the low-temperature heat exchanger 21 by the solution pump 20, and then partly passes through the high-temperature heat exchanger 22 and the flow control mechanism (not shown) to regenerate the high temperature. Sent to vessel 1,
The remainder is sent to the low-temperature regenerator 3 and sprayed from the spraying device 5.

The hot water heated by the heat transfer tube 12 is branched by the cold water pump 24 and sent to the indoor units 101a, 101b, and 101c. Return.

The above is the operation of the system in a steady state. However, even if the above operation is started from the state where the absorption chiller / heater is stopped, the temperature and concentration of the solution are low, so Can not exert the heating ability. So next,
A control method of the system at the time of starting the heating operation will be described with reference to FIGS. FIG. 4 is a graph showing the schedule of the heating operation and the change in the room temperature. FIG. 5 is a flowchart showing a control method at the start of the heating operation.

In the heating operation schedule shown in FIG. 4, t1 'is the heating operation start time, and t2' is the heating operation end time. Assuming that the time required from the start of the operation of the absorption chiller / heater to the time when the heating capacity can be exhibited is approximately Δt ′, the time t that is Δt ′ earlier than the heating operation start time t1.
At 3 ', it is necessary to start the absorption chiller / heater. Therefore,
The time t is stored in the storage unit 109 in the central controller 106.
3 ′ and time t2 ′ are stored as an operation schedule. t1 ', and therefore t3' and t2 ', are not constant every day, but are times determined from, for example, the working days and working hours of a company or office, or the working days and working hours of a store or the like. Th is a reference temperature of the room temperature, and is stored in the storage unit 109 in the central control device 106. At time t3 ', the temperature sensor 103a
The temperature signals of 103b and 103c are
Control unit 108 via the input / output unit 107
When the lowest values of these temperatures are lower than the set value Th of the temperature stored in the storage unit 109 as shown in Case 1 of FIG. 4, the preparation of the absorption chiller / heater is immediately performed. A control signal is issued from the control unit via the input / output unit so that the operation is started. That is, the solution pump 20, the cold water pump 24, the refrigerant pump 1
4 is operated and the burner 2 is ignited. The solution is circulated between the high-temperature regenerator 1 and the low-temperature regenerator 3 and the absorber 16 and is heated by the high-temperature regenerator 1 and the low-temperature regenerator 3 to generate a refrigerant vapor. Go.
Then, after elapse of the time Δt ′, both the temperature and the concentration of the solution have reached a steady operation state, and after the heating operation start time t1 ′, the remote controller 102a of the indoor unit,
When one of the switches 102b and 102c is turned on, the heating capacity can be immediately output.

The indoor unit remote controller 102a,
If the hot water temperature reaches the reference temperature Tu in a state where neither of the switches 102b and 102c is turned on, the burner 2, the cold water pump 24, the refrigerant pump 14, and the solution pump 20 are stopped to be in a standby state. Here, Tu is a set value of the hot water temperature, and is stored in the storage unit 109 in the central controller 106. Furthermore, if there is no ON signal from the indoor unit even after the lapse of a certain time, the temperature of the solution decreases, and the process returns to the start of the start control again.

In case 2 of FIG. 4, at time t3 ', the highest of the indicated values of the temperature sensors 103a, 103b, 103c has not reached the reference temperature Th, as in case 1; The operation of the absorption chiller / heater is started immediately. Thereafter, after time t5 ', the temperature sensor 1
03a, 103b, and 103c are the reference temperatures Th.
When the switches of all the remote controllers of the indoor units are turned off thereafter, the stop operation of the absorption chiller / heater is performed. And the temperature sensor 103
The lowest values of a, 103b and 103c are again the reference temperature Th.
When the lower value is reached, the operation of the absorption chiller / heater is started at that time in the same manner as described above. Then, the heating operation of the indoor unit is enabled after Δt 'time, and when any one of the switches of the remote controllers 102a, 102b, and 102c of the indoor unit is turned on, the heating capability can be immediately provided.

In the embodiment described above, the operation of the absorption chiller / heater is started when any one of the temperature sensors 103a, 103b and 103c reaches the set temperature Th. It takes.
Therefore, the reference temperature Th may be set slightly higher than the temperature at which heating is required, in the same manner as in the case of cooling. Also, if the user can change the temperature setting, it is possible to adjust the time from the start of the operation of the absorption refrigerator to the time when heating becomes necessary.

Further, the absorption chiller / heater may be started using a method of estimating the room temperature after the time Δt ′ as in the cooling operation.

In the above description, the indoor temperature is detected to determine whether or not to start up the hot and cold water heater. However, the outdoor temperature may be used instead of the indoor temperature. Or,
Using both the room temperature and the outside air temperature, the determination may be made from the maximum temperature or the minimum temperature of both, or the average temperature of both.

Next, another embodiment of the present invention will be described with reference to FIG. The difference from the embodiment of FIG. 1 is that the temperature signals of the temperature sensors 103a, 103b and 103c provided in the room are transmitted to the corresponding remote controller 10 in the room.
2a, 102b, and 102c. A room temperature signal is sent to the central controller 106 through a remote controller. Others are the same as the embodiment of FIG. According to the present embodiment, there is an advantage that the function of adjusting the temperature in the room is provided in the remote controller, and the temperature can be finely adjusted individually in each room.

Next, another embodiment of the present invention will be described with reference to FIG. The difference from the embodiment of FIG. 1 is that the remote controllers 102a, 102b, 102c connected to the indoor units
Separately, a remote controller 110 is installed, a signal from the temperature sensor 103c is taken into the remote controller 110, and the remote controller 110 is turned on.
-OFF switch is provided so that a temperature signal and ON-O
The FF signal is sent. Further, the remote controllers 102a, 102b, and 102c take in the temperature of each room and control only the corresponding indoor unit. Others are the same as the embodiment of FIG. According to this embodiment, the remote controllers 102a, 102b, and 102c connected to the indoor units need only control only the indoor units, for example, only the fans of the indoor units, and have an effect that the configuration can be simplified.
Further, the central control device 109 does not need to process information from each room, but only has to process information from the remote controller 110, and has an advantage that the processing amount can be reduced.

In this embodiment, the remote controller 110 is installed in one of the air-conditioned rooms.
This may be installed in another easy-to-operate place. Also,
A temperature sensor that sends a temperature signal to the remote controller 110 may be installed in any room, and signals may be sent from a plurality of room temperature sensors. In addition, a temperature sensor that sends a temperature signal to a remote controller connected to each indoor unit can be omitted, and in this case, the remote controller connected to each indoor unit can be further simplified.

In the above embodiment, the remote controller and the central control unit may be connected to each other by information communication means such as wireless or optical communication in addition to signal lines.

Further, in each of the embodiments, if the temperature of the hot / cold water reaches a predetermined value before the ON signal is input from the indoor remote controller after the start of the hot / cold hot / cold water heater, If the heat source of the regenerator of the machine is stopped, the heat source can be effectively used.

[0039]

As described above, according to the present invention, the preparation operation of the absorption chiller / heater is controlled by combining the operation schedule, the reference temperature, and the measured temperature information. Even if it is not known in advance whether or not the air conditioner is required, a preparation operation can be performed accurately without waste, and a system capable of quickly responding to the need for air conditioning can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an absorption cooling and heating system according to one embodiment of the present invention.

FIG. 2 shows the cooling operation schedule and the change in indoor temperature 1
It is a figure showing an example.

FIG. 3 is a flowchart illustrating a control method at the start of a cooling operation according to the present invention.

FIG. 4 shows the schedule of the heating operation and the change in the indoor temperature.
It is a figure showing an example.

FIG. 5 is a flowchart illustrating a control method at the start of a heating operation according to the present invention.

FIG. 6 is a configuration diagram of an absorption cooling and heating system according to another embodiment of the present invention.

FIG. 7 is a configuration diagram of an absorption cooling and heating system according to still another embodiment of the present invention.

[Explanation of symbols]

 101a, 101b, 101c Indoor unit 102a, 102b, 102c Remote controller 103a, 103b, 103c Temperature sensor 104 Temperature sensor 106 Central controller 108 Control unit 109 Storage unit

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroaki Yoda 603, Kandamachi, Tsuchiura-shi, Ibaraki Pref. Hitachi, Ltd. Tsuchiura Plant (56) References JP-A-1-318864 (JP, A) JP-A-2- 71035 (JP, A) JP-A-60-2859 (JP, A) JP-A-55-15596 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F25B 15/00 306

Claims (12)

(57) [Claims] An absorption cooling and heating system comprising: an absorption cooling and heating device for supplying cooling and heating water for cooling and heating; and an indoor unit for cooling and heating the room by circulating the cooling and heating water from the absorption cooling and heating device. And the reference temperature are set in advance, and temperature information from a temperature sensor that detects indoor and / or outdoor temperatures satisfies a predetermined relationship with the reference temperature within the scheduled operation time. In this case, even if there is no input of a chiller / heater ON signal from the room, the absorption chiller / heater is controlled to start up and perform a preparatory exercise. 2. An absorption cooling and heating system comprising: an absorption cooling and heating device for supplying cooling and heating water for cooling and heating; and an indoor unit for cooling and heating the room by circulating the cooling and heating water from the absorption cooling and heating device. A storage unit storing the scheduled operation time zone and the reference temperature of the day, a control unit for controlling the operation of the absorption chiller / heater based on the information stored in the storage unit, and an ON- A remote controller capable of OFF control is provided on the indoor side, and a temperature sensor for detecting the indoor and / or outdoor temperature is provided. The temperature information from the temperature sensor has a predetermined relationship with the reference temperature within the scheduled operation time zone. Is satisfied, the control unit controls to start the absorption chiller / heater and perform the preparatory operation even without input of an ON signal from the remote controller. How to Start tassel system. 3. The reference temperature is set lower by a predetermined width depending on the temperature at which the necessity of air conditioning is felt on average, for cooling, and higher for heating. 3. The method according to claim 2, wherein the unit controls the preparation operation of the absorption chiller / heater when the temperature from the temperature sensor reaches the reference temperature in the scheduled operation time zone. 4. 4. The method according to claim 3, wherein the scheduled operation time zone is set so as to start a predetermined time earlier than the scheduled operation start time of the indoor unit. 5. The reference temperature is set to a temperature at which the necessity of air conditioning is felt on average, and the temperature after a certain time estimated from the temperature from the temperature sensor at a certain time and the rate of temperature change thereafter. The method according to claim 2, wherein the controller controls the preparation operation of the absorption chiller / heater when the reference temperature is reached within the scheduled operation time zone. 6. The control unit according to claim 1, wherein in addition to the variable control performed by combining the scheduled operation time zone, the reference temperature, and the temperature information from the temperature sensor, the control unit also enables fixed control in accordance with the scheduled operation time zone. The method for starting an absorption cooling and heating system according to any one of claims 2 to 5, wherein the method is controlled so that the system can be switched and used. 7. After the absorption chiller / heater is started, if the temperature of the chiller / heater reaches a predetermined set value before an ON signal is input from the indoor remote controller, the regenerator of the absorption chiller / heater is activated. The method according to any one of claims 2 to 6, wherein the heating source is stopped. 8. An absorption cooling and heating system comprising: an absorption cooling and heating device for supplying cooling and heating water for cooling and heating; and an indoor unit for cooling and heating the room by circulating the cooling and heating water from the kino absorption cooling and heating device. A storage unit storing a scheduled operation time zone and a reference temperature of the machine, a control unit for controlling the operation of the absorption chiller / water heater based on the information stored in the storage unit, and ON- A remote controller provided on the indoor side, which enables OFF control, is provided on the indoor side, and further comprises a temperature sensor for detecting the indoor and / or outdoor temperature, and the control unit receives the temperature information from the temperature sensor. When the predetermined relationship with the reference temperature is satisfied within the scheduled operation time, the absorption chiller / heater is started to perform the preparatory operation even if the ON signal is not input from the remote controller. Absorption heating and cooling system characterized by comprising a control means for. 9. The reference temperature is set to a predetermined width depending on the temperature at which the need for air conditioning is felt on average, lower for cooling, and higher for heating. 9. The absorption cooling and heating system according to claim 8, wherein the absorption cooling and heating system is controlled such that the reference operation of the absorption chiller / heater is performed when the temperature from the temperature sensor reaches the reference temperature in the scheduled operation time zone. 10. The absorption cooling and heating system according to claim 9, wherein the scheduled operation time zone is set so as to start a predetermined time earlier than the scheduled operation start time of the indoor unit. 11. The reference temperature is set to a temperature at which the need for air-conditioning is felt on average, and the control means controls the temperature from a temperature sensor at a certain time and a certain time after a certain time estimated from a temperature change rate thereafter. The absorption cooling / heating system according to claim 8, wherein the absorption cooling / heating system is controlled so that the reference operation of the absorption chiller / heater is performed when the temperature reaches the reference temperature in the scheduled operation time zone. 12. The control means can perform fixed control according to the scheduled operation time zone in addition to the variable control performed by combining the scheduled operation time zone, the reference temperature, and the temperature information from the temperature sensor. The absorption cooling / heating system according to any one of claims 8 to 11, wherein the absorption cooling and heating system is configured to be able to be used by switching.