JPH0222312B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an absorption chiller/heater having a cooling water system condenser and a hot water system condenser.

This type of double-bundle type absorption chiller/heater has the disadvantage that the hot water taken out from the condenser is affected by fluctuations in the cooling water load, making it impossible to obtain hot water at a stable temperature. In other words, when the chilled water load is large, the amount of heating to the regenerator is usually increased to provide a large amount of refrigerant to the chilled water load, so the amount of heat dissipated in the condenser of the refrigerant vapor from the regenerator is large, and high-temperature hot water can be taken out. However, when the chilled water load is small, the amount of heat released from the refrigerant vapor in the condenser is small in order to reduce the amount of heating to the regenerator, which has the disadvantage that hot water at the desired temperature cannot be obtained.

In view of this, the present invention communicates the water pipe of one condenser that takes out hot water with the water pipe provided in the water heater attached to the high-temperature regenerator, and provides a control valve to the cooling water pipe of the other condenser. The absorption chiller/heater is configured to include a controller that connects a side pipe through the condenser and adjusts the opening degree of the control valve based on the outlet temperature of one of the condensers, stabilizing hot water at a desired temperature. The purpose is to supply the liquid to the outside of the aircraft.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 is a high-temperature regenerator which has a combustion heating chamber 2 for city gas or oil, etc. and heat conduction pipes 3, 3 from the heating chamber, and heats and separates refrigerant vapor from a dilute liquid to regenerate an intermediate liquid; A low-temperature regenerator 5 that heats the intermediate liquid with the refrigerant vapor from the regenerator 1, further separates the refrigerant vapor, and regenerates it into a concentrated liquid; and a hot water system condenser that condenses and cools the refrigerant vapor from both the regenerators 1 and 5. 6 and a cooling water system condenser 7;
9 is an evaporator configured to obtain cold water for air conditioning by using the latent heat when the liquid refrigerant from the regenerated condensation barrel 4 is sprayed and vaporized; 9 is a vaporized refrigerant that is sprayed with the concentrated liquid from the low-temperature regenerator 5; 10 and 11 are a low temperature exchanger and a high temperature heat exchanger, which are connected to the refrigerant vapor pipe 1.
2. A refrigerant circulation path 15 having a refrigerant liquid flow pipe 13, a refrigerant pump 14, a dilute liquid 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 regenerator 1, and a drain control valve 22 is disposed in a refrigerant pipe 21 connecting the lower part of the water heater and the high temperature regenerator. 23 is a water pipe that takes out hot water from the hot water system condenser 6 via the water heater 20, and the water pipe is connected to the outlet side of the condenser 6 and the water heater 2.
Temperature detectors 24 and 25 are provided on the zero exit side, respectively. Reference numeral 26 denotes a cooling water pipe which takes away the heat of dilution and the latent heat of condensation of the refrigerant vapor when the concentrated liquid absorbs the vaporized refrigerant from the absorber 9 through the cooling water system condenser 7. Condenser 7
A bypass pipe 28 is provided to bypass the. 2
Reference numeral 9 denotes a cold water pipe that takes out cold water through the evaporator 8, and a temperature detector 30 is disposed in the cold water pipe. Further, 31 is a fuel supply path to the combustion heating chamber 2, and a fuel control valve 32 is disposed in the supply path. The opening of the drain control valve 22 is adjusted by a signal from a temperature detector 25 via a temperature regulator 33, and the opening of the fuel control valve 32 is adjusted by a signal sent from a cold water side temperature detector 30 via a regulator 34. The opening degree of the three-way valve 27 is adjusted by a central processing controller 35 that numerically processes the signal sent from the hot water side temperature detector 25 via the controller 33, and the three-way valve 27 is connected to the condenser 6 outlet side temperature sensor 24 via the regulator 36. The opening is adjusted by the signal.

During operation of the absorption chiller/heater, when the chilled water load for cooling becomes small, that is, when the chilled water temperature becomes low, the regulator 34 and the central processing controller 35 are activated by the signal from the chilled water side temperature detector 30. The opening degree of the fuel control valve 32 is reduced to reduce the amount of heating to the high temperature regenerator 1, thereby generating an amount of refrigerant corresponding to the chilled water load.
At this time, since the amount of refrigerant vapor introduced into the regeneration condensation shell 4 decreases, the temperature of hot water at the outlet side of the hot water system condenser 6 decreases, and the signal from the temperature detector 24 that detects the temperature decreases. The opening degree of the three-way valve 27 on the side pipe 28 side is increased and the opening degree on the condenser 7 side is decreased through the regulator 36, thereby reducing the amount of cooling water to the regenerated condensation shell 4. As a result, the amount of condensation in the cooling water system condenser 7 is reduced to the refrigerant vapor in the regenerating condensing shell 4, and most of the refrigerant vapor is condensed in the hot water system condenser 6, and the latent heat is radiated to the hot water, so that the predetermined temperature is Hot water can be drawn from the water tube. Note that if hot water at a predetermined temperature is not obtained even if the amount of cooling water to the cooling water system condenser 7 is reduced to zero, the water is drained via the regulator 33 according to the signal from the temperature sensor 25 on the outlet side of the water heater 20. The opening degree of the control valve 22 is increased, the liquid refrigerant level in the water heater 20 is lowered, and the heat transfer surface with the refrigerant vapor in the water pipe 23 is increased to raise the temperature of the hot water.

In other words, such an absorption water cooler/heater can take out hot water at a desired temperature even if the amount of heating to the high temperature regenerator 1 is reduced, and is a water cooler/heater with good thermal efficiency that effectively utilizes the supplied heating energy.

Furthermore, when the cold water load is extremely small and the amount of heating to the high temperature regenerator 1 is insufficient, the temperature detector 2
5, the regulator 33 and the central processing controller 35
The opening degree of the heating material control valve 32 is increased to increase the amount of heating, and the amount of refrigerant vapor introduced into the water heater 20 is increased to raise the temperature of the hot water.

Next, during operation of the absorption chiller/heater, when the chilled water load increases, that is, when the chilled water temperature becomes high, the amount of heating to the high temperature regenerator 1 is increased in response to the increased chilled water load, and the regenerating condensing cylinder 4 The amount of refrigerant vapor introduced into the refrigerant vapor increases, and the hot water temperature at the outlet side of the hot water system condenser 6 rises, and a signal from the temperature detector 24 that detects this temperature causes the side passage of the three-way valve 27 to be increased via the regulator 36. tube 2
The opening degree on the 8th side is decreased and the opening degree on the condenser 7 side is increased to increase the amount of cooling water to the regenerated condensation shell 4. As a result, most of the latent heat of refrigerant vapor condensation in the regenerating condensation shell 4 is radiated to the cooling water, so hot water at a predetermined temperature can be taken out from the water pipe 23.

In this way, such an absorption chiller/heater changes the amount of cooling water to respond to changes in the amount of heat released from the refrigerant vapor inside the regenerating condensing shell 4 due to heating amount control according to changes in the chilled water load. By adjusting the amount of heat released from the refrigerant vapor to the hot water, the amount of heat released from the refrigerant vapor to the hot water can be kept substantially constant at all times, and at the same time, it is possible to take out cold water according to the cold water load, and at the same time, it is possible to efficiently and stably take out hot water at a desired temperature.

Although not shown, a control valve is provided in the side pipe 28 in place of the three-way valve 27 to change the flow rate of cooling water in the side pipe, thereby indirectly changing the amount of cooling water flowing through the condenser 7. However, using the three-way valve 27 to directly change the amount of cooling water flowing through the condenser 7 provides more accurate control. Alternatively, instead of the three-way valve 27, a control valve (not shown) may be provided in each of the side pipe 28 and the branched cooling water pipe 26.

In addition, such an absorption chiller/heater uses high-temperature water (e.g., 80°C high-temperature water) that is higher than the refrigerant condensation temperature in the regeneration condensation shell 4.
It can also be taken out from the outlet side water pipe 23 of the water heater 20.

As described above, the present invention provides a condenser formed by a cooling water pipe and another condenser formed by a water pipe for taking out hot water, and a water pipe for one condenser for taking out hot water and a water heater attached to a high temperature regenerator. A side pipe is provided in the cooling water pipe of the other condenser to bypass the condenser through a control valve,
In addition, since the hot water temperature on the outlet side of one condenser is detected and the opening degree of the control valve is adjusted to control the cooling water flow rate, the desired hot water can be stably taken out, and furthermore, the desired hot water can be taken out stably. Hot water at a temperature higher than the condensation temperature of the refrigerant inside the vessel can be taken out from the water heater.

[Brief explanation of drawings]

The drawing is an explanatory diagram of a circuit configuration of an embodiment of the present invention. 1...High temperature regenerator, 6...Hot water system condenser, 7...
... Cooling water system condenser, 20 ... Water heater, 23 ... Water pipe, 26 ... Cooling water pipe, 27 ... Three-way valve, 28 ...
...Side pipe, 35...Controller.

Claims (1)

[Claims] 1. In an absorption cold water heater equipped with two condensers, the water pipe of one condenser that takes out hot water is connected to the water pipe installed in the water heater attached to the high-temperature regenerator, and the water pipe of the other condenser is cooled. The water pipe is connected to a pipe that bypasses the other condenser through a control valve, and includes a controller that adjusts the opening degree of the control valve based on the outlet side temperature of the one condenser. Absorption chiller/heater.