JP3224726B2 - Air conditioning equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an abnormal decreasing in temperature of cold water during a cooling operation or abnormal increasing in temperature of hot water during a heating operation to be prevented by a method wherein a control device for each of air conditioners is provided with a central monitoring device of an air conditioner for outputting an instruction to forcedly open a cold water or hot water valve. SOLUTION: A central monitoring device 9 for an air conditioner is connected to an air conditioner control device 7 for each of the air conditioners 4 through communication or the like. The air conditioners 4 are stopped in sequence and in the case that the air conditioner 4 being operated up to the last time is stopped, an instruction to make a forced opening of a cold water or hot water valve 6 is given to the predetermined air conditioner control device 7 from the central monitoring device 9 of the air conditioner, thereby the cold water or hot water valve 6 arranged for each of the air conditioners 4 is forcedly opened. With such an arrangement as above, the cold water or hot water can be circulated through a cold water or hot water pipe passage 3 at an air conditioning load including the air conditioners 4 and further it is possible to prevent an abnormal decreasing in temperature of cold water during cooling operation or to prevent an abnormal increasing in temperature of hot water during heating operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and, more particularly, to a central air conditioner using an absorption chiller / heater for producing chilled / hot water as a heat source.

[0002]

2. Description of the Related Art Conventionally, air conditioning equipment for cooling and heating by using a gas absorption type chiller / heater as a heat source unit and sending and cooling water to a plurality of air conditioners installed in each room is disclosed in Japanese Patent Application No. Hei 5-103.
As in No. 730, a bypass pipe provided with a valve between the cold / hot water supply pipe to the air conditioner and the cold / hot water return pipe was installed near the heat source unit. In this case, the air conditioner is stopped, the cold / hot water valve provided for each air conditioner is closed, and the valve in the bypass pipe is opened when the cold / hot water circulation amount becomes equal to or less than a predetermined amount, and the cold / hot water device is opened. The circulation of the hot and cold water was compensated, and the operation of the hot and cold water heater was continued.

When the air conditioner that has been operating to the end stops, the cold / hot water valve provided in the air conditioner is closed, and the cold / hot water device outputs a stop command from the cold / hot water device central monitoring device. Then, after performing the residual operation (dilution operation) for about 10 minutes, the operation is stopped. Here, when the air conditioner is stopped, the cold / hot water valve provided in the air conditioner is closed, and the cold / hot water is circulated through a piping route passing through a bypass pipe provided in the vicinity of the cold / hot water device. The residual (dilution) operation of the machine will be performed.

[0004]

Therefore, in this case, the only circulating cold and hot water is the cold and hot water retained in the pipe route passing through the bypass pipe, and during the residual (dilution) operation,
During cooling, the temperature of the cold water drops, and during the heating, the temperature of the hot water rises. As a result, there is a problem in that a protection device such as a low temperature of the cold water or a high temperature of the hot water operates to cause a failure.

The present invention has been made in view of the above circumstances, and even when all the air conditioners are stopped, the cooling / heating water valve of a predetermined air conditioner is forcibly opened, and the piping route on the air conditioning load side is opened. An object of the present invention is to provide an air conditioner capable of preventing an abnormal decrease in cold water temperature during cooling or an abnormal increase in hot water temperature during heating by circulating cold and hot water through the inside.

[0006]

In order to achieve the above-mentioned object, the present invention provides an absorption type chiller / heater for producing cold and hot water,
A cooling / heating water bypass path having a valve that is opened when the circulation flow rate of the absorption chiller / heater becomes equal to or less than a predetermined flow rate, and a plurality of air conditioners connected to the absorption chiller / heating machine with a chill / hot water pipe A cold / hot water valve installed in the middle of a cold / hot water pipe for each air conditioner, an operation switch for individually operating and stopping the air conditioner, and operating the air conditioner in conjunction with the operation switch And an air conditioner control device for performing operation stop control and opening / closing control of the cold / hot water valve;
An air conditioner equipped with a chiller / hot water heater central monitoring device that operates an absorption type chiller / heater when the unit is also operating,
Forcibly provided an air conditioner central monitoring device for outputting an open command for the cold and hot water valves to each air conditioner control device, the air conditioner
The central control unit of the air conditioner controls the air conditioner of the air conditioner that stops last.
The hot / cold water valve remains in the Japanese machine control unit for a predetermined time and is forcibly opened.
Is output .

According to the present invention, even when the air conditioner that has been operating to the end is stopped, the air conditioner central monitoring device issues a command to the air conditioner control device to forcibly open the cold / hot water valve. By outputting, it is possible to perform control to forcibly open a cold / hot water valve provided for each air conditioner. This makes it possible to circulate the cold and hot water in the cold and hot water piping path on the load side including the air conditioner, thereby preventing an abnormal decrease in the cold water temperature during cooling or an abnormal rise in the hot water temperature during heating.

[0008] The air conditioner central monitoring device controls the cold / hot water valve of the air conditioner to be stopped last so as to be opened for the dilution time / operating time of the absorption type cold / hot water machine.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the air conditioner according to the present invention will be described below with reference to the drawings. FIG. 1 shows a flow configuration diagram of the air conditioning equipment of the present invention. As shown in FIG. 1, the air-conditioning equipment includes an absorption chiller / heater 1 for producing chilled / hot water and a bypass valve 2 that opens when the circulating water amount of the absorption chiller / heater 1 becomes equal to or less than a predetermined flow rate. A plurality of air conditioners (air conditioners) 4 connected with absorption type chiller / heater 1 and chiller / heater pipe 3, chiller / heater 1 and air conditioner 4
A cold / hot water pump 5 for circulating cold / hot water between the air conditioner and a cold / hot water valve 6 attached to the middle of the cold / hot water pipe for each air conditioner 4.

The air-conditioning equipment is provided with an operation / operation of each air conditioner 4.
An operation switch R for individually stopping the air conditioner, an air conditioner control device 7 for operating / stopping the air conditioner 4 and controlling the opening and closing of the chilled / hot water valve in conjunction with the operation switch R, and even one air conditioner 4 operated A hot / cold water heater central monitoring device 8 for operating the absorption-type cold / hot water machine 1 when the system is in operation. Further, the air conditioner is provided with an air conditioner central monitoring device 9 for forcibly outputting a command to open the cold / hot water valve 6 to each air conditioner control device 7.

The chiller / heater central monitoring device 8 is connected to the chiller / heater control panel 10 by communication or the like, and is also connected to the air conditioner controller 7 of each air conditioner 4. The air conditioner central monitoring device 9 is also connected to the air conditioner control device 7 of each air conditioner 4 by communication or the like.

In the above-described configuration, by operating the cold / hot water machine 1 and the cold / hot water pump 5, the cold / hot water is guided to each air conditioner 4 through the cold / hot water pipe 3, and each air conditioner 4 cools and heats the room. Do.

In this embodiment, an air conditioner central monitoring device 9 forcibly outputs a command to open the cold / hot water valve 6 to the air conditioner control device 7.
Is provided. A specific example in the case of operating an air conditioner with this configuration will be described below.

When the air conditioner 4 is sequentially stopped and the air conditioner 4 that has been operating to the end is stopped, the cold / hot water valve 6 is forcibly transmitted from the air conditioner central monitoring device 9 to a predetermined air conditioner control device 7. By outputting a command to open, the control for forcibly opening the cold / hot water valve 6 provided for each air conditioner 4 can be performed. Thereby, the cold and hot water can be circulated in the cold and hot water piping path 3 on the air conditioning load side including the air conditioner 4, and it is possible to prevent an abnormal decrease in the cold water temperature during cooling or an abnormal rise in the hot water temperature during heating. it can.

In this case, the air conditioner central monitoring device 9 may output an open command signal to any one of the air conditioner control devices 7, but the operation of the air conditioner control device 7 of the air conditioner 4 to be stopped last is performed during operation. It is preferable to output a signal for forcibly opening the cold / hot water valve 6 that has been left open for a predetermined time. And
The time during which the cold / hot water valve 6 that is output to the air conditioner control device 7 of the air conditioner 4 that stops last and remains open forcibly is set to be equal to or longer than the dilution operation time of the absorption cold / hot water machine 1.

[0016]

As described above, according to the present invention, even when the air conditioner that has been operating to the end is stopped, the cold / hot water valve is forced from the air conditioner central monitoring device to the air conditioner control device. By outputting the command to open the air conditioner, it is possible to perform control to forcibly open the cold / hot water valve provided for each air conditioner. This makes it possible to circulate cold and hot water in the piping path on the load side including the air conditioner, and to prevent an abnormal decrease in cold water temperature during cooling or an abnormal rise in hot water temperature during heating.

[Brief description of the drawings]

FIG. 1 is a flow configuration diagram showing an embodiment of an air conditioner according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorption chiller / heater 2 Bypass valve 3 chiller / heater pipe 4 Air conditioner 5 Chiller / heater pump 6 Chiller / heater valve 7 Air conditioner controller 8 Cooler / heater central monitor 9 Air conditioner central monitor 10 Cooler / heater control panel

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 11/02 102 F25B 15/00 306

Claims (2)

(57) [Claims] An absorption chiller / heater for producing chilled / hot water, a chilled / heated water bypass having a valve which is opened when a circulating flow rate of the absorption chilled / heated water falls below a predetermined flow rate, A plurality of air conditioners connected by a chiller / heater and a chiller / heater pipe, a chiller / heater valve installed in the middle of a chiller / heater pipe for each air conditioner, and individually operating and stopping the air conditioner An operation switch to be operated, an air conditioner control device that operates and stops the operation of the air conditioner in conjunction with the operation switch, and controls the opening and closing of the cold / hot water valve, and when even one air conditioner is operating An air conditioner equipped with a chiller / heater central monitoring device that operates an absorption chiller / heater, wherein the air conditioner central device forcibly outputs a command to open the chiller / heater valve to each air conditioner controller. the monitoring device is provided, the air conditioner central monitoring device, An air conditioner to stop after
The cold / hot water valve remains in the air conditioner controller of the
An air conditioner, which outputs a signal for forcibly opening . 2. The air-conditioning equipment according to claim 1 , wherein the time during which the chilled / hot water valve remains and is forcibly opened is equal to or longer than the dilution operation time of the absorption chilled / hot water machine.