JPS5854344B2 - Dual effect absorption refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dual-effect absorption refrigeration system, in particular, it compensates the temperature at which cold water and hot water are taken out according to the outside air temperature, and automatically changes the set temperature at which the cold water and hot water are taken out. The purpose is to provide a function that allows adjustment of this compensation ratio (multiplying factor) within an arbitrary range.

Normally, when cooling is performed using a dual-effect absorption refrigeration system,
As the outside temperature drops and the cooling load becomes smaller, cold water at a lower temperature becomes unnecessary.

Currently, the commonly used chilled water temperature control uses the outlet temperature of the chilled water to adjust the fuel used to heat the generator.As a result, the smaller the cooling load, the lower the chilled water temperature is than necessary. It has become.

This also applies to heating. The present invention solves the above-mentioned drawbacks by compensating for the outside air temperature, and an embodiment shown in the drawings will be described below.

1 is a direct firing high temperature generator that has a combustion heating chamber 2 for burning a heat source such as gas or oil and heat exhaust pipes 3, 3, etc. of the heating chamber and heats and separates the refrigerant from the replacement fluid; 4 is the high temperature generator; Vessel 1
a low-temperature generator that uses the refrigerant vapor sent out from the generator as a heat source to reheat and further heat and separate the intermediate liquid refrigerant; 5 is a condenser that condenses and cools the refrigerant flowing from both generators 1 and 4 using a cooler 6; Reference numeral 7 denotes an evaporator which uses the latent heat generated when the liquid refrigerant from the condenser 5 is dispersed and vaporized to obtain cold water for air conditioning from the water cooler 8, and 9 the refrigerant is separated by the low temperature generator 4. Absorbers 10 and 11 are low-temperature heat exchangers, which maintain the inside of the evaporator 7 at a low pressure and continuously supply cold water by scattering concentrated liquid and absorbing refrigerant vapor inside the vessel. In the high temperature heat exchanger, these are the refrigerant vapor pipes 1
2, a refrigerant circulation path 15 having a refrigerant liquid flow pipe 13, a refrigerant pump 14, a liquid replacement pipe 17 having an absorption liquid pump 16, an intermediate liquid pipe 18, and a concentrated liquid pipe 19 are connected to form a refrigeration cycle.

20 is a water heater attached to the high temperature generator 1, 21.22
．． 23 is a switching valve that switches between cooling and heating.

Reference numeral 24 denotes a fuel control valve as a heat source heat amount control valve provided in the heating flow path 25 of the high temperature generator 1, and the control valve is operated via a temperature regulator 30 that sets the cold water or hot water extraction temperature. It is controlled by a signal from a cold water temperature detector 27 provided at the outlet of the water cooler 8 or a signal from a hot water temperature detector 29 provided at the outlet of the water heater 20 by switching the changeover switch 28, and when cold water is taken out. The outside temperature is the temperature controller 30
When the temperature of the outside air falls below the main setting temperature of the outside air, the temperature controller 30 adjusts the setting of the cold water take-out temperature of the temperature controller 30 to the main setting temperature of the chilled water of the temperature controller 30 according to the signal from the outside air temperature detector 26. In addition, when the outside air temperature becomes equal to or higher than the outside air main setting temperature of the temperature controller 30 when hot water is taken out, the temperature controller 30 changes the setting of the hot water takeout temperature of the temperature controller 30 according to the signal from the outside air temperature detector 26. The temperature is adjusted to below the main hot water setting temperature of the temperature regulator.

Next, the operation of the above configuration will be explained.

Power First, during cooling operation using cold water, in this case, the switching valve 21° 22.2 switches between cooling and heating.
3 are opened and the changeover switch 28 is switched to the cold contact C side to heat the high temperature generator 1, thereby performing a refrigeration cycle and obtaining cold water for cooling from the water cooler 8.

Then, as shown in Figure 2 A, 2B, and 8, the temperature controller 3
0, for example, if the main set temperature of chilled water is set to 7℃, the main set temperature of outside air is set to 30℃, and the compensation magnification is set to 50%, when the outside air temperature drops by 2℃ from 30℃ to 28℃, the As shown in FIG. 3, the setting of the cold water outlet temperature in the temperature controller 30 is automatically adjusted to 8° C. based on the signal from the outside air temperature detector 26.

Therefore, when the temperature sensed by the cold water temperature detector 27 is lower than 8°C, the temperature controller 3 is
0, the opening degree of the fuel control valve 24 is controlled to decrease, the refrigerating capacity is controlled, and the cold water outlet temperature of the water cooler 8 is maintained at 8°C.

In other words, when the outside air temperature falls below the outside air main set temperature, the cold water outlet temperature is automatically increased to compensate.

0 During heating operation with hot water In this case, the switching on-off valve that switches between cooling and heating 21° 22.2
3 are closed and the selector switch 28 is switched to the hot junction H side to heat the high temperature generator 1, hot water for heating can be obtained from the water heater 20.

Then, as shown in Figure 4, the temperature controller 3
0, for example, if the main hot water temperature setting is set to 60°C, the outside air main setting temperature is set to 0°C, and the compensation magnification is set to 50%, if the outside air temperature becomes 10°C from 0°C, the temperature will change as shown in Figure 5. Thus, the setting of the hot water take-out temperature in the temperature regulator 30 is automatically adjusted to 55° C. based on the signal from the outside air temperature detector 26.

When the temperature detected by the hot water temperature detector 29 is higher than 55° C., the opening degree of the fuel control valve 24 is controlled to decrease via the temperature regulator 30 based on the signal from the hot water temperature detector 29, thereby causing a high temperature. The heating capacity of the vessel 1 is suppressed, and the hot water outlet temperature of the water heater 20 is maintained at 55°C.

In other words, when the outside air temperature rises above the outside air main set temperature, the hot water take-out temperature automatically decreases to compensate.

Since the dual-effect absorption refrigeration system according to the present invention is constructed as described above, by compensating for the outside air temperature when the cooling load or heating load is small, it is possible to lower the chilled water temperature more than conventionally necessary or to lower the hot water temperature. It saves wasted heat source heat that would be wasted when heating the air, making it possible to operate economically, and improving controllability because the temperature of the conditioned air from the air conditioner increases during cooling and decreases during heating. do.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a dual-effect absorption refrigeration device according to the present invention;
Figures 2A and 3C are explanatory diagrams showing the setting status and compensation operation during cooling operation, and Figure 4A. Figures 5 and 5 are explanatory diagrams showing setting states and compensation operations during heating operation. 1... High temperature generator, 8... Water cooler, 20... Water heater, 24... Fuel control valve, 26... Outside air temperature detector, 27... Chilled water temperature detector, 29.・・Hot water temperature detector, 0 ・・Temperature controller.

Claims (1)

[Scope of Claims] 1. A refrigeration cycle is configured by connecting a high temperature generator, a low temperature generator, a condenser, an evaporator, an absorber, and a heat exchanger with piping, and a heat source calorie control is provided in the heating flow path of the high temperature generator. The control valve is controlled by a signal from a cold water temperature sensor provided at a cold water outlet via a temperature controller that sets a cold water outlet temperature, and the control valve is controlled by a signal from a cold water temperature detector provided at a cold water outlet, and the outside air temperature is controlled by a temperature controller that sets a cold water outlet temperature. When the temperature of the outside air falls below the main setting temperature of the outside air, the temperature controller adjusts the setting of the cold water take-out temperature to the main setting temperature of the chilled water according to a signal from the outside air temperature detector. Refrigeration equipment. 2 A refrigeration cycle is constructed by connecting a high temperature generator, a low temperature generator, a condenser, an evaporator, an absorber, and a heat exchanger with piping, and a water heater is attached to the high temperature generator, and the heating flow path of the high temperature generator is is equipped with a heat source calorie control valve, and the control valve controls the temperature of the cold water from the cold water temperature sensor installed at the cold water outlet or the hot water temperature detector installed at the hot water outlet through a temperature controller that sets the temperature at which the cold water or hot water is taken out. When the outside air temperature is below the outside air vitality temperature of the temperature controller when cold water is being taken out or when the outside air temperature is above the outside air main setting temperature of the temperature controller when hot water is being taken out, the outside air temperature sensor The temperature controller adjusts the setting of the cold water take-out temperature to be equal to or higher than the main set temperature of cold water or the setting of the hot water take-out temperature to be lower than the main set temperature of hot water according to the signal. Device.