JPS5886364A - Air-conditioning hot-water supply device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air-conditioning/heating-water supply device that can perform cooling, heating, and hot water supply by being driven by a thermal engine.

Conventional air conditioners include a compressor driven by an engine, an indoor heat exchanger, an outdoor heat exchanger, an expander, and a four-way It consists of a four-way valve that uses the indoor heat exchanger, full evaporator, and outdoor heat exchanger as condensers during cooling, and the indoor heat exchanger, full condenser, and outdoor heat exchanger when in V-room. There are auxiliary heat exchangers in the prime mover cooling system that are used as total evaporators and are installed near at least one side of the indoor heat exchanger and outdoor heat exchanger, through which hot water that cools the engine flows, and there are also For water heaters, JP-A-56-30
As described in Publication No. 567, an air-conditioning system equipped with a compressor driven by an engine, and exhaust heat +1j that uses the exhaust heat of the engine as a hot water supply heat source and as an auxiliary heating heat source for the air-conditioning system (1). Some are equipped with a heat exchanger,
In both cases, a refrigerant heat exchanger and a heat exchanger for engine exhaust heat are installed on the indoor side, so two reciprocating pipes are required for each, and a total of four pipes had to be connected on-site. . 1. The former device did not have a hot water supply function, and the latter device only used engine exhaust heat as a heat source for hot water supply, and neither of these could be considered effective.

For the purpose of the present invention, it is possible to connect a mechanical unit that houses an engine and a heat pump type refrigerator to an indoor unit that houses an indoor heat exchanger with a minimum number of two inter-unit piping, while also providing heating support. This air-conditioning/heating water heater uses engine exhaust heat as a heat source, and also uses condensed heat from a heat pump refrigerator in addition to the engine exhaust heat as a hot water source, allowing both heat sources to provide powerful heating for instant hot water extraction. As a result, the unit of the device is simplified, downsized, reduced in cost, improved in reliability, simplified, maintainable, and workable.

In order to achieve the objective, the configuration of the air conditioning/heating/water heater according to the present invention includes a refrigerant compressor driven by a thermal engine,
One is a heat exchanger for hot water supply, and one is a condenser for heating and cooling.
a heat pump refrigerant circuit having a user-side heat exchanger and a heat source-side heat exchanger, the other of which is used as an evaporator; a water-side heat exchanger that exchanges heat with the user-side heat exchanger; and a water-side heat exchanger separated from the water-side heat exchanger. Connected indoor heat exchanger I! i! ! a cold/hot water circulation circuit having oil and oil; a thermal engine; a hot water heater and an indoor nine-burner heater for selectively introducing high-temperature wastewater from the engine; and discharging the heat of the high-temperature wastewater outdoors. It is equipped with a hot water exhaust circuit having an outdoor radiator, and a hot water supply circuit having a heat absorber in which city water is heated by the hot water heat exchanger and the hot water heater.
It is arranged in a heat exchange relationship on the water side heat exchanger side in the cold/hot water N path.

With this configuration, indoor circulating water heated by the refrigerant is reheated by the exhaust heat of the thermal engine during heating and hot water supply, and only two water pipes are required to connect the indoor unit. At the same time, a commercially available fan coil can be conveniently used as an indoor unit, and the number of valves included in the circuit can be minimized to two two-way valves, one three-way valve, and one four-way valve.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the air-conditioning, heating, and hot-water supply apparatus according to the present invention will be described below with reference to the drawings.

First, the configuration of the heat pump refrigerant circuit will be explained.

The refrigerant compressed by the compressor 2 driven by the thermal engine 1 reaches the four-way valve 6, passes through the hot water heat exchanger 4, and then
Either the three-way valve 5 or the hot water expander 6? After passing through the heat source side heat exchanger 8 having seven outdoor fans, it passes through either the two-way valve 9 or the cooling expander 10, and then the user side heat exchanger 11, and then reaches the four-way valve 6. The air is returned to the compressor 2 via the rotor 12, and the four-way valve 6 switches the rotation in the opposite direction as described above.

First, the configuration of the hot water exhaust circuit of the thermal engine 1 will be explained. A circuit of circulating water sent out from the pump 16 and cooling one thermal engine such as an engine reaches a three-way valve 14, and the three-way valve connects a circuit 16 to an indoor heater 15 and a circuit 18 to a hot water heater 17. It is branched into. Indoor heater 1
The circuit 16 toward the hot water heater 17 returns to the pump 16 after passing through the heater, and the circuit 18 toward the hot water heater 17 passes through the hot water heater and then returns to the outdoor fan 19. It returns to the pump 16 via an outdoor radiator 20.

Next, the hot water supply circuit runs from the city water supply pipe 21 to the pressure reducing check valve 2.
2, passes through the hot water supply heat exchanger 4 and the heat absorber 26 heated by the hot water heater 17, and reaches the faucet 24.

Next, the cold/hot water circulation circuit includes a water-side heat exchanger 26 in which the circulating water sent from the indoor circulating water pump 25 is heat-exchanged with the user-side heat exchanger 11, and an auxiliary heat exchanger in which the circulating water is heated by the indoor-side heater 15. Indoor heat exchanger 2 having a container 27 and an indoor fan 28
It is configured so that it returns to the pump 25 after nine steps. 60
(indoor unit), 31i is a mechanical unit installed outdoors, and 32.33 is the inter-unit piping that is connected on-site.

Next, the operations of the heat pump refrigerant circuit, hot water exhaust circuit, hot and cold water circulation circuit, and hot water supply circuit during cooling, heating, hot water supply, and defrosting operations will be explained.

(1) Explanation during cooling operation a) High-pressure refrigerant from the high-pressure discharge port of the compressor 2 driven by the thermal engine 1 passes through the four-way valve 6 and is pre-condensed in the hot water heat exchanger 4. Passing through the direction valve 5 and the heat source side heat exchanger 8
and is condensed by the outdoor fan 7. Next, cooling expander 1
At 0, it evaporates in the expansion bed utilization side heat exchanger 11. The evaporation layer and refrigerant pass through the four-way valve 6 and are sucked in from the low-pressure suction port of the compressor 2.

b) The indoor circulating water pump 25 of the cold/hot water circulation circuit is operated, and the circulating water is cooled in the water side heat exchanger 26, passes through the auxiliary heat exchanger 27, passes through the right indoor side heat exchanger 29, and is then cooled by the indoor fan. 28 cools the room temperature and is sucked into the indoor circulating water pump 25.

The cooling water discharged from the pump 16 of the exhaust hot water circuit cools the thermal engine 1, passes through the three-way valve 14, radiates heat during hot water supply in the hot water heater 17, and goes to the right outdoor radiator 20, When hot water is not being supplied, heat is radiated by the outdoor fan 19. The cooling water is then sucked into the pump 16.

(2) Explanation during heating operation a) High-pressure refrigerant from the high-pressure discharge port of the compressor 2 driven by the thermal engine 1 passes through the four-way valve 6 and is condensed in the heat exchanger 11 on the user side, after which it is dissipated and condensed into an expander for cooling. It expands at 10, evaporates at the heat source side heat exchanger 8, and removes heat from the outdoor air by the outdoor fan 7.

After passing through the evaporation layer two-way valve 5 and the hot water supply heat exchanger 4, it is sucked into the compressor 2 through the four-way valve 6.

b) Indoor circulating water from the indoor circulating water pump 25 is warmed in the water side heat exchanger 26, reheated in the auxiliary heat exchanger 27, and passed through the indoor heat exchanger 29, and then returned indoors by the fan 28. The heated indoor circulating water is sucked into the indoor circulating water pump 25.

C) Cooling water discharged from the pump 16 of the hot water exhaust circuit cools the thermal engine 1, passes through the three-way valve 14, radiates heat at the indoor heater 15, and is sucked into the pump 16.

(5) Explanation during hot water supply operation a) High pressure refrigerant from the high pressure discharge port of the compressor 2 driven by the thermal engine 1 is condensed in the hot water supply heat exchanger 4 through six four-way valves, and is condensed in the hot water supply expander 6. The heat is evaporated in the expansion layer heat source side heat exchanger 8 and the fan 7 removes heat from the atmosphere. After that, it passes through the two-way valve 9, the user-side heat exchanger 11, and is sucked into the compressor 2 from the four-way valve 6.

b) The indoor circulating water pump 25 is stopped.

The cooling water discharged from the pump 13 of the exhaust hot water circuit cools the thermal engine 1f and passes through the three-way valve 14 to the hot water heater 17.
After passing through the outdoor radiator 20, the hot water is sucked into the pump 16 of the exhaust hot water circuit.

d) In the hot water supply circuit, the pressure due to the direct connection to city water is reduced by a pressure reducing check valve 22 and released from the heating layer faucet 24 by a heat absorber 26.

(Li. Explanation during defrosting operation a) During heating operation, frost forms on the heat source side heat exchanger 8 due to a drop in outside temperature. At this time, the high-pressure refrigerant from the high-pressure discharge port of the compressor 2 driven by the thermal engine 1 is passed through the hot water supply heat exchanger 4 and the two-way valve 5 through the four-way valve 6, and the heat exchanger 8 on the heat source side is cooled. Congeal by melting. The refrigerant then passes through the cooling expander 10, evaporates in the user-side heat exchanger 11, and is sucked into the compressor 2 through the four-way valve 6.

b) Indoor circulating water and thermal engine cooling water are operated in the same manner as when the FPi cell is operated. The water side heat exchanger 26 is cooled by the user side heat exchanger 11 acting as an evaporator, but the auxiliary heat exchanger 27 is heated by the indoor side heater 15, so the indoor temperature is completely lowered. Heating operation continues without any problems.

Since the air conditioning/heating/hot water supply apparatus according to the present invention is configured as described above, it has the following effects.

(1) During heating Indoor circulating water (heating water) heated by the refrigerant in the Narcissus heat exchanger 26 is reheated by the exhaust heat of the thermal engine in the auxiliary heat exchanger 27, so high temperature water is obtained and comfortable. You can expect heating.

(2) Since the inter-unit piping to the indoor unit 30 is one-way, only two water pipes are required, one for each, which simplifies the installation work.Furthermore, a commercially available fan coil can be used as the indoor unit. Therefore, it is cheaper.

(3) It is highly reliable because it includes a minimum number of valves: two three-way valves, one three-way valve, and one four-way valve.

(4) Hot water is supplied to the hot water heat exchanger 4 and the hot water heater 1
Since indirect heating is performed in step 7, it is safe even if there is a leak in the refrigerant (b) path, thermal engine exhaust hot water circuit, etc.

[Brief explanation of drawings]

The drawing is a system diagram showing the configuration of a heat pump type refrigerant circuit, a thermal engine exhaust hot water circuit, a hot water supply circuit, and a cold/hot water circulation circuit of the air conditioning/heating/hot water supply apparatus according to the present invention. 1... Thermal engine 2... Compressor 4... Hot water supply heat exchanger 8... Heat source side heat exchanger 11... User side heat exchanger 15... Indoor side heater 17... ... Hot water heater 20 ... Outdoor radiator 26 ... Heat absorber 26 ... Water side heat exchanger 27 ... Auxiliary heat exchanger 29 ... Indoor heat exchanger agent Patent attorney Isao Fujimoto

Claims (1)

[Claims] (1) A heat pump that has a refrigerant compressor driven by a thermal engine, a heat exchanger for hot water supply, and a user side and heat source side heat exchanger, one of which is used as a condenser and the other as an evaporator during cooling and heating. a cold/hot water circulation circuit having a refrigerant circuit, a water-side heat exchanger that exchanges heat with the user-side heat exchanger, and an indoor-side heat exchanger that is separately connected to the water-side heat exchanger; and the thermal engine. , a hot water exhaust circuit having a hot water heater and an indoor heater for fully switching the high temperature waste water from the engine, and an outdoor radiator for discharging the heat of the high temperature waste water outdoors; a hot water supply circuit having a heat exchanger and a heat absorber in which city water is heated by a hot water heater, and the indoor heater is arranged in a heat exchange relationship on the side of the daffodil heat exchanger in the cold/hot water circuit. An air-conditioning, heating, and water-heating device characterized by the following.