JPS6113143B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam heat source absorption chiller/heater that uses steam as a heat source and can simultaneously produce cold water and hot water.

Conventionally, absorption chillers that use steam or hot water as a heat source are made with the sole purpose of producing cold water; if hot water is required, a steam/hot water heat exchanger is required completely separate from the chiller. We are responding by installing hot water boilers and hot water boilers.

If you only need cold and hot water, use gas,
Direct-fired water coolers and hot water machines using heat sources such as oil are used to meet this requirement, but if steam is required in addition to cold and hot water, some of the steam produced by a steam generator may be used. It was customary to produce cold water using an absorption refrigerator with a steam heat source, and to produce hot water using a heat exchanger provided as a separate facility.

In such conventional steam heat source absorption chiller/heater, the absorption chiller and hot water heat exchanger are installed separately, requiring separate installation locations and separate adjustment mechanisms, which reduces equipment costs. Operating costs were also high.

The present invention eliminates the above-mentioned drawbacks of the conventional ones by providing a hot water heat exchanger in the bypass connecting the heating steam inlet and outlet paths of the generator.
It is an object of the present invention to provide a steam heat source absorption chiller/heater that requires a small installation space, has a simple adjustment mechanism, and can reduce costs.

The present invention comprises a generator, a condenser, an evaporator, an absorber and a hot water heat exchanger, wherein steam is used as a heating source for the generator, and a steam control valve is provided in the steam inlet path to the generator. In a steam heat source absorption chiller/heater that produces cold water in the evaporator and hot water in the hot water heat exchanger, a bypass is provided between the steam inlet path and the steam outlet path from the generator, The hot water heat exchanger is disposed in the bypass so that steam is used as a heating source, and a cold water outlet temperature detector for detecting the cold water outlet temperature from the evaporator and a hot water outlet temperature detector for detecting the hot water outlet temperature from the hot water heat exchanger are provided. A hot water outlet temperature detector is provided to detect the hot water outlet temperature, and when the load on the cold water system is large, the steam control valve is controlled according to a signal from the cold water outlet temperature detector, and when the load on the hot water system is large, the hot water The steam heat source absorption chiller/heater is characterized by comprising a control mechanism that controls the steam control valve according to a signal from an outlet temperature detector.

The present invention will be described with reference to the drawings, in which A is an absorber, E is a steamer, G is a generator, C is a condenser, and W is a hot water heat exchanger. The solution path and refrigerant path in the refrigeration cycle are not shown. 1 and 2 are steam inlet pipes for introducing steam, 3 is a heating pipe, 4 is a steam outlet pipe, and 5 is piping. 6 is a steam control valve that controls the flow rate of steam, and 7 is a trap.

Note that not only steam but also both steam and condensate may pass through the steam outlet pipe 4, or the "steam outlet path" as used herein, or only one of them may pass therethrough. Reference numerals 8 and 9 indicate bypasses that connect the steam inlet pipe 2 from the steam control valve 6 to the generator G and the steam outlet pipe 4 from the generator G to the trap 7. A hot water heat exchanger W serving as a source is inserted and provided. 10
1 is a hot water inlet pipe, 11 is a hot water pipe, 12 is a hot water outlet pipe, and 13 is a safety water tank. 14, 15, 16,
Reference numerals 17 and 18 designate a cooling water pipe 19 as a cold water inlet pipe, 20 as a cold water pipe, and 21 as a cold water outlet pipe.

22 is a cold water outlet temperature regulator, and 23 is a hot water outlet temperature regulator. 24 is a cold water outlet temperature regulator 2
This is a control mechanism that selects either the signal from the hot water outlet temperature regulator 23 or the signal from the hot water outlet temperature regulator 23 using a switch, etc., and controls the steam control valve 6 accordingly, so that the cold water (refrigeration) load is changed to the hot water load. If the temperature is greater than If the hot water outlet temperature is too high, a signal from the hot water outlet temperature regulator 23 is selected to control the steam control valve 6 so that the hot water outlet temperature remains approximately constant, thereby achieving stable control.

For example, when the chilled water load is relatively large, the chilled water outlet temperature is detected, and when the chilled water load becomes excessive and the chilled water outlet temperature tends to rise, a signal from the chilled water outlet temperature regulator 22 is sent to the control mechanism 2.
4 opens the steam control valve 6, but if the hot water load is quite large and the hot water heat exchanger W consumes a lot of steam, the amount of heating added to the generator G will be insufficient, and the cold water outlet temperature will decrease. As the steam rises further, this is detected and the steam control valve 6 is further opened to stabilize the system.

The present invention includes a generator, a condenser, a steamer, an absorber, and a hot water heat exchanger, wherein steam is used as a heating source for the generator, and a steam control valve is provided in the steam inlet path to the generator. In a steam heat source absorption chiller/heater that produces cold water in the evaporator and hot water in the hot water heat exchanger, a bypass is provided between the steam inlet path and the steam outlet path from the generator, The hot water heat exchanger is disposed in the bypass so that steam is used as a heating source, and a cold water outlet temperature detector for detecting the cold water outlet temperature from the evaporator and a hot water outlet temperature detector for detecting the hot water outlet temperature from the hot water heat exchanger are provided. A hot water outlet temperature detector is provided to detect the hot water outlet temperature, and when the load on the cold water system is large, the steam control valve is controlled according to a signal from the cold water outlet temperature detector, and when the load on the hot water system is large, the hot water By providing a control mechanism that controls the steam control valve in accordance with the signal from the outlet temperature detector, the refrigerator main body and hot water heat exchanger can be installed compactly together, requiring an extremely small installation space. It is an object of the present invention to provide a steam heat source absorption chiller/heater that can simplify the adjustment mechanism by sharing equipment such as a steam control valve, drain valve, and trap, is easy to handle, and can reduce equipment costs and operating costs. This has a very large practical effect.

[Brief explanation of drawings]

The drawing is a flow diagram of an embodiment of the invention. A...absorber, E...evaporator, G...generator,
C...Condenser, W...Hot water heat exchanger, 1...Steam inlet pipe, 2...Steam inlet pipe, 3...Heating tube, 4...
...Steam outlet pipe, 5...Piping, 6...Steam control valve,
7...Trap, 8,9...Bypass, 10...
Hot water inlet pipe, 11... Hot water pipe, 12... Hot water outlet pipe, 13... Safety water tank, 14, 15, 16, 1
7, 18...Cooling water pipe, 19...Cold water inlet pipe, 2
0...Cold water pipe, 21...Cold water outlet pipe, 22...Cold water outlet temperature regulator, 23...Hot water outlet temperature regulator, 24...Control mechanism.

Claims (1)

[Scope of Claims] 1. A generator comprising a generator, a condenser, an evaporator, an absorber and a hot water heat exchanger, wherein steam is used as a heating source for the generator, and a steam control valve is provided in the steam inlet path to the generator. In the steam heat source absorption chiller/heater which produces cold water in the evaporator and hot water in the hot water heat exchanger, a bypass is provided between the steam inlet path and the steam outlet path from the generator. the hot water heat exchanger is provided in the bypass so as to use steam as a heating source; a cold water outlet temperature detector for detecting the cold water outlet temperature from the evaporator; and a hot water outlet temperature from the hot water heat exchanger. A hot water outlet temperature detector is provided to detect the temperature, and when the load on the cold water system is large, the steam control valve is controlled according to a signal from the cold water outlet temperature detector, and when the load on the hot water system is large, the steam control valve is controlled according to the signal from the cold water outlet temperature detector. A steam heat source absorption chiller/heater comprising a control mechanism that controls the steam control valve in accordance with a signal from a temperature outlet temperature detector. 2. The steam heat source absorption chiller/heater according to claim 1, wherein the bypass branches from a steam inlet path between the steam control valve and the generator.