JPS6339830B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat pump type air-conditioning system that can perform air-conditioning and heating by switching four-way valves.The main purpose of the invention is to provide an energy-saving effect that has a hot water supply function and a function of recovering waste heat from bath water, etc. in addition to the above-mentioned air-conditioning function. Our goal is to provide large heat pump air conditioning systems.

An explanation will be given below based on an example shown in the drawings. 1st
The figure shows a schematic configuration diagram of the present invention, where 1 is an outdoor unit, 2 is an outdoor unit;
3 is an indoor heat exchanger, 3 is a hot water storage tank, and a heat exchanger 4 for boiling water is provided in the hot water storage tank 3. Reference numeral 5 denotes a heat exchanger for recovering exhaust heat disposed in a heating tank 7 connected to a bathtub 6. In this embodiment, the heat exchanger 5 can also be used for reheating as will be described later. Each of the heat exchangers 2, 4, and 5 is connected to the outdoor unit 1.
and are connected by refrigerant pipes A, B, and C, respectively.
Next, a description will be given based on the piping diagram shown in FIG.
Inside the outdoor unit 1, there is a four-way valve 9 connected to the inlet/outlet of the compressor 8, an indoor heat exchanger 2 sequentially connected to the four-way valve 9, and an expansion mechanism 1 for cooling that is bypassed during heating.
1. Heating expansion mechanism 12 that is bypassed during cooling;
It is equipped with an outdoor heat exchanger 10 and, as will be described later, a refrigerant heater 13 that is heated by combustion heat from a gas burner or the like or electric heat, which is used when the heat pump capacity is insufficient during heating. The outdoor heat exchanger 10 and the cooling expansion mechanism 11 are the solenoid valves 41 and 4.
2, 43, 44, and the expansion mechanism 1
1 is connected to an indoor heat exchanger 2 via a refrigerant pipe A, and the indoor heat exchanger 2 is connected to a four-way valve 9 via a refrigerant pipe A and a solenoid valve 45. 14 is a branch path that bypasses the cooling expansion mechanism 11 and the electromagnetic valve 44, and the branch path 14 is provided with a check valve 15. The heating expansion mechanism 12 is connected to the indoor heat exchanger 2 via the solenoid valves 42, 43, 44, the cooling expansion mechanism 11, and a branch path 16 that bypasses the branch path 14. A solenoid valve 46 is interposed therein. The refrigerant heater 13 is provided in a branch path 19 that bypasses the heating expansion mechanism 12, the solenoid valve 41, and the outdoor heat exchanger 10, and is connected to the four-way valve 9. is provided. One side of the heat exchanger 4 for boiling water is connected to the heating expansion mechanism 12 via a check valve 18, and the other side is connected between the electromagnetic valves 43 and 44 via an electromagnetic valve 48. 4
4 and a solenoid valve 45 and a four-way valve 9 are connected via a solenoid valve 49, and by opening the solenoid valves 48 and 49, the indoor heat exchanger 2 and the cooling expansion mechanism 11 are connected.
A path D is formed to bypass the. The heat exchanger 4 also connects one of the above to the four-way valve 7 via the solenoid valves 50 and 51, and bypasses the outdoor heat exchanger 10 and the heating expansion mechanism 12 by opening both the solenoid valves 50 and 51. A path E is formed to do this. The heat exchanger 5 for exhaust heat recovery has one end connected between the solenoid valves 50 and 51 of the system E, and the other end connected between the solenoid valves 42 and 43.
By opening 9 and 48, a heat pump circuit is formed with the heat exchanger 4 via the heating expansion mechanism 12.

The operation of the present invention having the above configuration will be explained with reference to the explanatory diagram shown in FIG. First, cooling is performed by opening the solenoid valves 41 to 45 and operating the compressor 8 with the solenoid valves 46 to 51 closed, and the room is cooled by the evaporation action of the indoor heat exchanger 2. For heating, open only the solenoid valves 41, 45, and 46, and open the four-way valve 9.
This is done by energizing the compressor 8 which has been switched, and the room is heated by the condensing action of the indoor heat exchanger 2. Hot water is supplied by operating the compressor 8 with only the solenoid valves 41, 48, and 49 open, and the system D connects the indoor heat exchanger 2 and the cooling expansion mechanism 11.
is bypassed, and the water in the hot water storage tank 3 is heated by the condensing action of the heat exchanger 4 for boiling water.
Also, during the above-mentioned cooling, condensed heat is released from the outdoor heat exchanger 10 to the outside, but when this heat is used for boiling water, the solenoid valves 44, 45, 48, 50, 5
Do this with 1 open. That is, in that case, route E
As a result, the outdoor heat exchanger 10 is bypassed, and the water boiling heat exchanger 4 performs a condensing action in place of the outdoor heat exchanger 10 to heat the water in the hot water storage tank 3. If the heating capacity of the heat pump is insufficient, the solenoid valve 41 is closed and the solenoid valve 47 is opened to allow the refrigerant heater 13 to heat the refrigerant, thereby achieving heating at a predetermined capacity. Next, when exhaust heat recovery is to be performed, the solenoid valves 42, 48, 49, and 51 are opened, the four-way valve 9 is switched to heating mode, and the compressor 8 is operated. Then, the heating expansion mechanism 12 is also used as a refrigerant expansion mechanism for exhaust heat recovery, the heat exchanger 5 acts as an evaporator, and the water boiling heat exchanger 4 acts as a condenser. The heat is recovered by heating the water in the hot water storage tank 3. To reheat the bathtub 6 using the heat exchanger 5, open the solenoid valves 41, 43, 49, and 50, and open the four-way valve 9.
All you have to do is switch to the heating mode and operate the compressor 8, and the heat exchanger 5 will act as a condenser, allowing you to reheat the bath water.

As described above, according to the present invention, in addition to the normal air-conditioning and heating functions, it also has the function of boiling water, and can also recover the amount of heat from drained hot water, such as residual hot water in the bathtub, regardless of the season.
This makes it possible to provide a heat pump type air-conditioning device that has an extremely large energy-saving effect.

In addition, the heat exchanger 5 for waste heat recovery is used to reheat the bath water, so in addition to the water heating function, there is no need for hot water equipment such as a bath pot, reducing the need for fuel piping and wiring work in general homes. It can bring about many effects.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram showing an embodiment of the present invention;
FIG. 2 is a diagram of the same piping, and FIG. 3 is an explanatory diagram. 2... Indoor heat exchanger, 3... Hot water storage tank, 4...
Heat exchanger (for water boiling), 5... Heat exchanger (for waste heat recovery), 8... Compressor, 9... Four-way valve, 10...
Outdoor heat exchanger, 11... Cooling expansion mechanism, 12
... Heating expansion mechanism, D... system path, E... system path.

Claims (1)

[Claims] 1 A four-way valve is connected to the inlet and outlet of the compressor, and an indoor heat exchanger, a cooling expansion mechanism that is bypassed during heating, a heating expansion mechanism that is bypassed during cooling, and an outdoor heat exchanger are sequentially connected to the four-way valve. A heat exchanger is provided in the hot water storage tank, and the heat exchanger passes through the heating expansion mechanism, bypasses the outdoor heat exchanger, the cooling expansion mechanism, and the indoor heat exchanger, and connects the bathtub to the bathtub. A heat exchanger disposed underwater and a system line connected to a four-way valve, and a heat exchanger disposed underwater in the bathtub bypass the heat exchanger in the hot water storage tank, the cooling expansion mechanism, and the indoor heat exchanger. A peat pump type air-conditioning device characterized in that a heating expansion mechanism, an outdoor heat exchanger, and a system connecting to a four-way valve are provided in a switchable manner.