JPH024150A - Heat source controller - Google Patents

Abstract

PURPOSE:To eliminate an auxiliary heat source by a method wherein by using a separating operation means through the control of the delivery temperature of a heat source, during running of an air conditioner for a minute load, the starting and the stop of a heat source and a cold water pump are controlled automatically. CONSTITUTION:During the feed of cold water, an air conditioner 6 is not operated, and in a state in which only the minute load of a fan coil 7 being below a load which is 1/10 of a heat source is used, the outlet temperature of a heat source 1 for a minute load decreases gradually. The temperature at that time is detected by a temperature sensor 2, and when the delivery temperature of the heat source 1 is decreased to a value lower than 5 deg.C, a signal 12 is outputted to the heat source 1 from a heat source controller 10 to stop the heat source 1. A cold water pump 9 is switched from normal 4-pole running to 8-pole running by means of a number of poles switching signal 13, capacity of the cold water pump 9 is reduced, and incurring of a pump loss is decreased. When the delivery temperature of the heat source 1 measured by the temperature sensor 2 is increased to a value higher than 10 deg.C, the heat source 1 performs reoperation. In this case, the cold water pump 9 is switched from 8-pole running to 4-pole running.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat source controller intended to expand the range of use of heat sources.

2. Description of the Related Art Conventionally, this type of heat source controller has had a configuration as shown in FIG. In FIG. 3, 1o1 is an absorption type cold and hot water generator (hereinafter referred to as a heat source), which is connected to a supply header 104 through a cold and hot water pipe 102, and is connected to a supply header 104 through a plurality of pipes 10.
3, and supplies cold and hot water to a plurality of air conditioners 1o6 (hereinafter referred to as air conditioners) that individually perform air conditioning. This air conditioner 1
The cold and hot water used from 05 is collected into the return tube 106, and when the heat source 101 is in operation, the cold and hot water pump 108 is operated on the signal line 107 to circulate the cold and hot water.

On the other hand, 109 is a heat pump or a package (hereinafter referred to as an auxiliary heat source), which has a smaller air conditioning capacity than the air conditioner 105, and is a plurality of fan coils/liter that air condition spaces with different usage conditions.
A pipe 110 is connected to /111 to supply cold and hot water.

The operation of the heat source system configured as above will be explained based on FIG. 4. In FIG. 4, the horizontal axis 112 indicates time, S on the vertical axis indicates the operating schedule of the heat source 1o1, K indicates the operating state of the heat source 101, and P indicates the operating state of the cold/hot water pump 108. In addition, - diagonal line 1
13 indicates an ON state, and a horizontal line 114 indicates an OFF state. When heat source operation schedule/L/S is entered, heat source 1
o1. The cold/hot water pump 108 is operated. On the other hand, when the heat source schedule expires, both devices stop, and all equipment simultaneously turns on and off in response to the on/off schedule.

On the other hand, the auxiliary heat source 109 is also turned on and off according to the schedule.

Problems to be Solved by the Invention In such a conventional configuration, when the fan coil 111 has a slight load of less than % of the heat source 1o1 during cold water, the heat source discharge temperature drops abnormally, and the heat source becomes abnormally low temperature. If it enters an emergency stop state, it must be manually reset to return to normal operation, and automatic operation will no longer be possible. Furthermore, if the emergency stop does not work, the refrigerant pump serving as the heat source may burn out, requiring a separate auxiliary heat source, which increases the cost of the equipment.

The present invention is intended to solve these problems, and aims to eliminate the need for an auxiliary heat source by automatically controlling the start and stop of the heat source and cold/hot water pump when an air conditioner is operated under a slight load.

Means for Solving the Problem In order to solve this problem, the present invention includes a heat source that supplies cold water and hot water to a plurality of air conditioners, and a pipe connected to the heat source to circulate the cold and hot water to the air conditioners. The cold/hot water pump is driven by a pole number switching motor, and the temperature sensor inserted into the outlet piping of the heat source. stop.

The heat source controller is equipped with separation/operation means that automatically switches the number of poles.

With this configuration, when there is a slight load during cold water, the heat source discharge temperature is controlled to turn on/off the heat source and switch the number of poles of the cold/hot water pump. The heat source can be operated continuously without stopping or burning out the refrigerant pump.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. In Figure 1, 1 is an absorption cold/hot water generator (
A temperature sensor 2 is inserted into the outlet of the heat source (hereinafter referred to as a heat source), a temperature sensor 2 is inserted into the outlet of the heat source, a pipe 3 is passed through the supply header 4, and a plurality of pipes 5 are connected to a plurality of air conditioners 6 and a plurality of fan coils with a slight load. Supply cold and hot water to L/7.

The cold and hot water used here is collected in a return header 8 and sent to a heat source by a cold and hot water pump 9 equipped with a motor for switching the number of poles, thereby circulating the cold and hot water. 10 is temperature sensor 2
and the temperature signal line are connected, and the heat source 1 is connected to the signal line 12. The hot and cold water pump is a heat source controller connected to the pole number switching line 13.

The operation of the heat source system configured as described above will be explained based on FIGS. 1 and 2.

In FIG. 2, the horizontal axis 14 indicates time, the diagonal line 14 indicates the ON state, and the horizontal line 16 indicates the OFF state. On the heat source operation schedule state S on the vertical axis, the heat source schedule is set to ON (
If it is indicated by the diagonal line 14), the cold and hot water pump 9 becomes ON from the operating state of the cold and hot water pump P as indicated by the diagonal line 14. The heat source 1 is in the ON diagonal line 14 from the heat source operating state of K.

Here, when cold water is supplied, when the air conditioner 6 is not used and the fan coil 7 is used with only a slight load, which is less than the load of the heat source, the outlet temperature of the heat source 1 gradually decreases due to the slight load. The temperature at that time is detected by the temperature sensor 2, and when the discharge temperature of the heat source 1 becomes 6 [℃] or less, the heat source controller 1o outputs a signal 12 to the heat source 1 to stop the heat source 1 (
point A).

In addition, the cold/hot water pump 9 is connected to the pole number switching signal 13.
The normal 4P operation is switched to 8P operation (point E), and the capacity of the cold/hot water bonder 9 is lowered to reduce pump loss. After operating in this state for a while, the cold water in pipes 3 and 5 will
Pipe 3 because the heat is absorbed little by little by Funkoi/L/7
The temperature inside gradually rises. When the discharge temperature of the heat source 1 measured by the temperature sensor 2 becomes 10 [° C.] or more, the heat source 1 is restarted (point B). At that time, the cold/hot water pump 9 is
Switching from operation to 4P operation (point F). After that, when the large capacity air conditioner 6 is not operated and only the Fancoi/I/7 is operated, the heat source 1 (7) O
(Repeat FF (point A), 0N (point B). At the same time, repeat 4P (point F) and 5P (point E) of the cold/hot water pump 9, at the OFF time of the heat source schedule/I/S. Heat source 1 until
The system can continue to operate without any problems, and since the air conditioning control is under a slight load, the temperature of the circulating cold water in the pipes changes slowly, causing no shanching phenomenon, and there is no problem with air conditioning.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, by using a separation operation means by controlling the heat source discharge temperature, the heat source can be operated continuously without any trouble, so a separate heat source for small loads is required. There is no need to provide a device, and the effect is that a low-cost heat source system can be assembled in a small space.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a heat source system including a heat source controller according to an embodiment of the present invention, FIG. 2 is a state diagram of the same heat source system, FIG. 3 is a configuration diagram of a conventional heat source system, and FIG. 4 is a configuration diagram of the same heat source system. FIG. 2 is a state diagram of the system. 1...Heat source, 2...Temperature sensor, 3.
...Piping, 6...Air conditioner, 7...
- Slight load (fan coil unit), 9...Cold/hot water pump, 10...Heat source controller. Name of agent: Patent attorney Toshio Nakao and one other person ('
Q Q) 〇-)tope

Claims (1)

[Claims] A heat source that supplies cold and hot water to multiple air conditioners, a cold/hot water pump connected to this heat source via piping and driven by a pole switching motor that circulates cold and hot water to the air conditioners, and a hot/cold water pump inserted into the outlet piping of the heat source. A heat source equipped with a temperature sensor and a separation operation means that automatically starts/stops the heat source/cold/hot water pump and switches the number of poles based on the temperature measurement of the temperature sensor even when there is a slight load during cold water. controller.