JPS6311582B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an absorption heat pump cooling/heating hot water supply system.

Conventionally, there has been a device of this type as shown in FIG. FIG. 1 will be explained.

Refrigerant gas generated from the concentrated liquid heated by the burner 17 in the generator 1 passes through the pipe 2 and enters the four-way valve 3.
The refrigerant gas enters the condensing heat heat exchanger 5 from the pipe 4 through the solid line portion and exchanges heat with the water supply in the hot water storage tank 30, and is condensed to become a high-pressure liquid refrigerant. The liquid refrigerant that enters from the port 6a of the three-way valve 6 enters the port 7a of the three-way valve 7 from the port 6c and exits to 7c, is depressurized by the expansion valve 8, evaporates in the heat exchanger 9, and removes heat of evaporation from the air by the fan 18. Cooling is performed.

The evaporated low-pressure refrigerant gas passes through the pipe 10 and the solid line portion of the four-way valve 3, and enters the mixer 12 from the pipe 11.

On the other hand, the diluted refrigerant gas in the generator 1 enters the mixer 12 through the pipe line 13, is mixed with the refrigerant gas, and enters the absorber 14. After absorbing the refrigerant gas in the absorber 14, the concentrated liquid is sent to the generator 1 through a pipe 15 by a solution pump 16. Absorber 1
The absorbed heat generated in the hot water tank 4 is transferred to a cooling heat medium (for example, antifreeze liquid, etc.) and becomes hot water, which is passed through the pipe line 21 by the circulation pump 22 to the heat exchanger 23 in the hot water storage tank 30.
After exchanging heat with the supplied water in the hot water storage tank 30, it enters through the port 24a of the three-way valve 24, exits through the port 24c, passes through the pipe 25, and enters the absorber 14. When the hot water supply port 29 is opened to supply hot water, city water enters the hot water storage tank 30 from the water supply pipe 28, is heated by natural convection by the condensing heat heat exchanger 5 and the heat exchanger 23, and is supplied from the hot water supply port 29.

When the temperature inside the hot water storage tank 30 rises sufficiently, it becomes difficult to exchange heat by natural convection between the condensing heat heat exchanger 5 in the hot water storage tank 30 and the heat exchanger 23, so the three-way valve 24 operates and the air-cooled heat is transferred. The heat absorbed by the absorber 14 is radiated by the exchanger 26 and the fan 27. In addition, the three-way valve 7 operates, and the air-cooled heat exchanger 19 and fan 20 radiate condensation heat.

During heating, the four-way valve 3 operates and the high-temperature, high-pressure refrigerant gas generated by the generator 1 passes through the pipe 2 to the four-way valve 3.
It passes through the broken line part and enters the heat exchanger 9 from the conduit 10, and the condensed heat is radiated by the fan 18 for heating. The heat of condensation is radiated to become a high-pressure liquid refrigerant, which is depressurized through the expansion valve 8 and enters the air-cooled heat exchanger 19 into the fan 20.
It absorbs heat from the outside air and evaporates, becoming a low-pressure refrigerant gas. Thereafter, it passes through the port 7b and 7a of the three-way valve 7, exits from the port 6c of the three-way valve 6 to 6b, passes through the conduit 4, passes through the broken line of the four-way valve 3, and enters the mixer 12 through the conduit 11. The circulation of the solution is the same as during cooling. The absorbed heat generated in the absorber 14 heats the water supplied in the hot water storage tank 30 in the heat exchanger 23, as in the case of cooling.

As explained above, the absorber 14 is installed in the hot water storage tank 30.
A heat exchanger 23 is provided for exchanging heat with a cooling medium, and a condenser heat exchanger 5 is provided below the heat exchanger 23, and the water in the hot water storage tank 30 is heated by natural convection, and city water is supplied from the water supply pipe 28 to supply hot water. The hot water supplied from port 29 was already hot. However, the water in the hot water storage tank 30 is heated by two units, the condensing heat heat exchanger 5 and the heat exchanger 23, and the heat exchanger 23 is heated by natural convection, so the heat transfer coefficient is poor and the water supply temperature in the hot water storage tank 30 is It takes time for the temperature to rise, and when the water temperature in the hot water storage tank 30 rises, the temperature difference between the condensing heat heat exchanger 5 and the heat exchanger 23 decreases, and the amount of heat exchange decreases. Therefore, it takes time to raise the heating source temperature. Hot water tank 3
If hot water is supplied when the water temperature in the tank has not risen sufficiently, there are problems such as cold water being supplied.

The present invention solves the above-mentioned problems in the conventional technology, and even if the temperature of the supplied water in the hot water storage tank 30 has not risen sufficiently, hot water can be obtained whose temperature is higher than the temperature in the hot water storage tank 30, and when hot water is supplied, This increases the amount of heat exchange and improves hot water supply.

The present invention will be explained below based on FIG. 2 of the embodiment. Note that elements common to those in FIG. 1 are given the same numbers, and explanations of overlapping parts will be omitted.

Refrigerant gas generated from the concentrated liquid heated by the burner 17 in the generator 1 passes through the pipe 2 and enters the four-way valve 3.
It passes through the solid line part and enters the second condensation heat heat exchanger 31 composed of the pipe line 4. The refrigerant gas that has exchanged heat with the water supply in the double-pipe heat exchanger 31 enters the condensation heat heat exchanger 5 in the hot water storage tank 30, exchanges heat with the surrounding water supply, and condenses to become a high-pressure liquid refrigerant. The liquid refrigerant that enters from the port 6a of the three-way valve 6 enters the port 7a of the three-way valve 7 from the port 6c and exits to 7c, is depressurized by the expansion valve 8, evaporates in the heat exchanger 9, and removes the heat of evaporation from the air by the fan 18. Cooling is performed.

The evaporated low-pressure refrigerant gas passes through the pipe 10 and the solid line portion of the four-way valve 3, and enters the mixer 12 from the pipe 11. On the other hand, the diluted refrigerant gas in the generator 1 passes through a pipe 13 and enters a mixer 12, where it is mixed with refrigerant gas and enters an absorber 14. After absorbing the refrigerant gas in the absorber 14, the concentrated liquid is sent to the generator 1 through a pipe 15 by a solution pump 16. Absorber 1
The absorbed heat generated in the hot water storage tank 30 is transferred to a heat medium (for example, antifreeze, etc.) and becomes hot water. Enters the exchanger 23,
After heat exchange in the hot water storage tank 30, the opening 24 of the three-way valve 24
a to the port 24c and passes through the pipe 25 to the absorber 14.
to go into. When the hot water supply port 29 is opened and hot water is supplied, the water supply pipe 2
City water enters the second heat exchanger 31 for condensing heat from 8 and exchanges heat with the internal high-temperature, high-pressure refrigerant gas in a counterflow by forced circulation, and the heated supply water enters the hot water storage tank 30 for heat exchange for condensing heat. It is heated by natural convection by the container 5 and the heat exchanger 23. When the hot water discharged from the hot water storage tank 30 passes through the second condensing heat heat exchanger 32, it is further heated by counterflow heat exchange by forced circulation and is supplied from the hot water supply port 29.

When the temperature inside the hot water storage tank 30 rises sufficiently, it becomes difficult to exchange heat by natural convection between the condensing heat heat exchanger 5 in the hot water storage tank 30 and the heat exchanger 23, so the three-way valve 24 operates and the air-cooled heat is transferred. The heat absorbed by the absorber 14 is radiated by the exchanger 26 and the fan 27. In addition, the three-way valve 7 operates, and the air-cooled heat exchanger 19 and fan 20 radiate condensation heat. However, even if it is only a little, the hot water supply port 29
When the hot water tank is opened and hot water is supplied, the hot water is further heated in the second absorption heat heat exchanger 32 and the second condensation heat heat exchanger 31 even though there is almost no heat exchange in the hot water storage tank 30. is preheated.

During heating, the four-way valve 3 operates and the high-temperature, high-pressure refrigerant gas generated by the generator 1 passes through the pipe 2 to the four-way valve 3.
It passes through the broken line part and enters the heat exchanger 9 and enters the fan 18.
The condensed heat is radiated to provide space for heating. The heat of condensation is radiated to become a high-pressure liquid refrigerant, which is depressurized through an expansion valve 8, enters an air-cooled heat exchanger 19, absorbs heat from the outside air through a fan 20, and evaporates to become a low-pressure refrigerant gas. After that, it passes from the port 7b of the three-way valve 7 to the port 7a, and the port 6 of the three-way valve 6
It exits from c to 6b, passes through conduit 4, passes through the broken line of four-way valve 3, and enters mixer 12 through conduit 11. The circulation of the solution is the same as during cooling. The absorbed heat generated in the absorber 14 heats the water supplied in the hot water storage tank 30 in the heat exchanger 23, as in the case of cooling. In addition, the hot water coming out of the hot water storage tank 30 is further heated by the second absorption heat exchanger 32 and then supplied from the hot water supply port 29 .

In the above embodiment, the dual heat exchangers 31 and 32 are provided outside the hot water storage tank 30, but they may be provided inside the hot water storage tank. Further, the double tube heat exchanger is not limited to this type, and may be of other types.

As described above, in the present invention, a heat exchanger for transmitting condensation heat and a heat exchanger for transmitting absorption heat are provided in the hot water storage tank, and the heat exchanger is provided in at least one of the inlet and output routes of the hot water storage tank. Since the heat exchanger is connected in series with the heat exchanger, even if the temperature of the water supply in the hot water storage tank is not sufficiently raised, the hot water can pass through the heat exchanger connected in series, and the second absorption heat heat exchanger will be activated. Heat exchange is promoted by counterflow caused by forced circulation inside the tank, resulting in hot water that is higher in temperature than the hot water in the hot water storage tank. Similarly to the hot water supply side, on the water supply side, city water from the water supply pipe passes through the second condensation heat heat exchanger 31, receives condensation heat, raises the temperature, and enters the hot water storage tank.
That is, by providing the hot water supply circuit with an instantaneous water boiling element, the absorption heat and condensation heat of the absorption heat pump device can be effectively used to produce hot water at a higher temperature.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a conventional absorption type heat pump cooling/heating hot water supply system, and FIG. 2 is a diagram showing an example of an absorption type heat pump cooling/heating hot water supply system according to an embodiment of the present invention. 1... Generator, 5... Heat exchanger for condensing heat, 14
...absorber, 16 ... solution pump, 23 ... heat exchanger for absorption heat, 28 ... water supply pipe, 29 ... hot water supply port, 30 ... hot water storage tank, 31 ... heat exchanger for second condensation heat , 32... second heat exchanger for absorption heat.

Claims (1)

[Claims] 1. An absorption heat heat exchanger for exchanging heat with the cooling heat medium of the absorber in a hot water storage tank provided with a city water inlet and a hot water outlet, and a heat exchanger located on the inlet side of the absorption heat heat exchanger. a second absorption heat heat exchanger connected in series with the absorption heat heat exchanger to exchange heat with hot water discharged from the hot water storage tank of the absorber; and the condensation heat heat exchanger. An absorption heat pump cooling/heating hot water system that includes at least one of a second condensing heat heat exchanger that is connected in series with the exchanger and exchanges heat with water entering the hot water storage tank.