JPS604012Y2 - Water chiller/heater operation controller - Google Patents

Description

[Detailed description of the invention] The present invention relates to an operation controller based on the output temperature of multi-stage connected water cooler/hot water machines and outside air temperature. The present invention relates to a controller that controls the number of cold/hot water machines not to be operated more than necessary by making a decision.

Conventionally, multi-position temperature controllers for water chillers/heaters detect the temperature of cold or hot water in the chiller/heater, operate or stop each chiller/heater based on the detected temperature, and adjust the output temperature. was in control.

According to this control, since the water chiller/heater requires time to start up when it starts operating, the water chiller/heater in the next stage or later starts operating before one chiller/heater is able to fully utilize its allocated capacity. There were cases where the water heater/cooler input was applied when the machine was turned off or when trying to start it.

For this reason, not only the average utilization rate of the water cooler/heater input is lowered, but also the input energy is wasted.

The purpose of this invention is to create an operation controller that eliminates these conventional problems.According to this invention, the outside temperature is captured and the magnitude of the load on the water cooler/heater is estimated based on the outside temperature value. - The number of cold/hot water machines connected in multiple stages to be operated is determined separately from conventional operation control.

Therefore, while the operated water cooler/heater is not reaching its full capacity, input to the water cooler/heater at the next stage or later is not inputted, and operating costs can be reduced.

Hereinafter, preferred embodiments of the present invention will be described in detail as illustrated in the accompanying drawings.

FIG. 1 is a diagram showing the main parts of the water chiller/heater operation controller during cooling according to the present invention.

In Fig. 1, there are two temperature detectors, an outside air temperature detector 1 and a cold water temperature detector 2, and two electronic thermoswitches 3, A and I, are arranged for the outside air temperature detector 1. Four electronic thermoswitches 3, A, B, C, and D, are arranged for the cold water temperature detector 2.

Then, the output of the electronic thermoswitch 3 corresponding to the outside air temperature and the output of the electronic thermoswitch 3 corresponding to the cold water temperature are inputted to the AND circuit 4, and the output is added to the relay drive circuit 5 to control the RA, RB, Ro. It has a circuit configuration that drives the relay 6 of the RD and the RD.

Fig. 2 is a diagram showing the output characteristics of A and B electronic thermoswitches 3 corresponding to the outside air temperature during cooling, and Fig. 3 is a diagram showing output characteristics of A, B, and A corresponding to the cold water temperature during cooling.
It is a figure which shows the output characteristic of the electronic thermoswitch 3 of C and D.

Therefore, since the output characteristics shown in FIGS. 2 and 3 are input to the logic circuit, when the electronic thermo switch 3 at the mouth is at a high level due to the outside temperature, the output of the logic circuit 4 is the temperature of the cold water. The outputs of electronic thermoswitches 3 A, B, C, and D obtained by Of the outputs of A, B, C, and D of the electronic thermoswitch 3 obtained depending on the temperature, only the outputs of A and B are obtained.

In addition, the output of the AND circuit 4 drives the corresponding relay 6, and the contact signals of these relays 6 are used to operate the cold water machine depending on the outside temperature. This results in a water chiller/hot water machine that is not operated regardless of the temperature, that is, a chiller/hot water machine operation controller that can predict the load on the chiller/hot water machine in advance based on the outside temperature and not operate unnecessary chiller/hot water machines.

For the sake of convenience in the above explanation, we have assumed that there are two electronic thermoswitches that correspond to the outside temperature and four electronic thermoswitches that correspond to the cold water temperature. but,
By thinking in the same way, you can decide which water cooler/heater to not operate based on the outside temperature.

Moreover, although the above explanation is about control in the case of cooling operation, the same can be considered for heating operation, and if the output temperature increases, the heating capacity can be controlled to be lowered.

More specifically, this can be easily carried out by setting each set temperature in the electronic thermoswitches 3 in FIG. 1 for heating, and by inverting the outputs of these electronic thermoswitches 3 through an inverter.

It should be noted that the controller according to the present invention can be applied to control most types of water chillers and hot water machines, since there is always a start-up time at the start of operation, regardless of the principle and structure of the water chiller/heater.

[Brief explanation of drawings]

Figure 1 is a diagram showing the internal configuration of the water chiller/heater operation controller, Figure 2
The figure is a diagram showing the input-output characteristics of the electronic thermoswitch corresponding to the outside temperature, and FIG. 3 is a diagram showing the input-output characteristic of the electronic thermoswitch corresponding to the cold water temperature.

Claims (1)

[Scope of utility model registration request] In a water chiller/heater operation controller that sequentially controls the operation of water cooler/heater machines connected in multiple stages according to the load, electronic thermoswitches A to D are provided corresponding to each chiller/heater, and the output of this electronic thermoswitch is used to control the operation. A cold and hot water machine characterized by comprising devices 5 and 6 that control the operation of the cold and hot water machines, and devices 1, 49, and 4 that detect the outside air temperature and control the number of chilled and hot water machines that are permitted to operate. Water machine operation controller.