JPS6136146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioning, heating, and water supply system, and more particularly to an air conditioning, heating, and water supply system that uses a refrigerant compressor to simplify and stabilize its load water piping system.

Conventionally, in heat pump application systems that have air conditioning and heating functions, the piping required to satisfy these functions is complicated, making on-site piping work complicated and requiring a large amount of space for piping. It was there.

In addition, in order to prevent abnormally high pressure from occurring in the piping system, construction design becomes complicated, and abnormally high pressure due to incorrect piping causes damage to the piping system and each unit.

An object of the present invention is to provide an air-conditioning, heating, and hot-water supply system that avoids and eliminates the drawbacks of the prior art as described above and enables simple and stable load water system piping.

The configuration of the air conditioning/heating/water supply device according to the present invention includes a compressor 21 related to a refrigerant compressor, a load side water heat exchanger 27,
A refrigerant cycle is constituted by the expansion valves 26, 26a, the heat source side water heat exchanger 23, and the four-way valve 22, and the hot water storage tank 2 and fan coil unit 3 are connected in parallel to the load side water heat exchanger 27, A circulation pump 28 is provided to send load water from the hot water storage tank 2 and fan coil unit 3 to the load side water heat exchanger 27, and from the load side water heat exchanger 27 to the hot water storage tank 2 and fan coil unit 3. In a device provided with electromagnetic valves 29 and 29a for selectively sending water, a return pipe 15 related to a hot water heating return pipe from the hot water storage tank 2 and a return pipe related to an air conditioning return pipe from the fan coil unit 3. 13 to form a return pipe 16 related to a single load water return pipe, and the interior of the hot water storage tank 2 is opened to atmospheric pressure at the water surface, so that the hot water storage The pressure associated with the return pipe 16 is released into the tank 2.

Next, one embodiment of the present invention will be described in detail based on the drawings.

Here, FIG. 1 is an overall explanatory system diagram of an air conditioning, heating, and hot water supply apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a heat exchange system of the main body.

First, in Fig. 1, 1 is the main body, 2 is a hot water storage tank, 3 is a fan coil unit, 4 is a pumping well, 5 is a pumping pump, 6 is a suction pipe, 7 is a discharge pipe,
8 is a reduction pipe, and 9 is a reduction well.

10 is a hot water supply pipe, 11 is a hot water supply faucet, 12 is a water supply pipe related to a water supply pipe for heating and cooling, and 13 is a water supply pipe.
14 is a hot water supply pipe related to the hot water heating water supply pipe, 15 is a return pipe related to the same return water pipe, and 16 is a return pipe related to the load water return pipe. 41 is a manual operation section, and 42 and 44 are wirings.

That is, water that is pumped from the pumping well 4 to the main body 1 via the suction pipe 6 and the discharge pipe 7 by the pump 5 is used as loaded water for heat exchange within the main body 1, and the water is pumped through the return pipe 8. The water is returned to the reduction well 9 through the water.

The main body 1 generates cold and hot water as load water, and also has a hot water supply function for supplying hot water to the hot water faucet 11 via the hot water pipe 10.

Therefore, when the above-mentioned hot and cold water is circulated through the water supply pipe 12, the fan coil unit 3, and the return pipe 13, the main body 1 performs air-conditioning and heating operation, and the interior of the main body 1 is circulated through the hot water supply pipe 14. When sending hot water to the hot water storage tank 2 which is open to atmospheric pressure, and circulating hot water from the hot water storage tank 2 to the main body 1 via the return pipe 15,
The main body 1 performs hot water heating operation.

The hot water supplied from the hot water faucet 11 is stored in the hot water tank 2.
The hot water is supplied via the hot water supply pipe 14 and the hot water supply pipe 10.

Further, the return water pipe 15 is joined to the return water pipe 13,
Both form a single return pipe 16 that communicates with the main body 1.

Next, the heat exchange system in the main body 1 will be explained. In FIG. 2, 21 is a compressor, 22 is a four-way valve, 23 is a heat source side water heat exchanger, 24, 24a
25 is a check valve, 25 is a liquid receiver, 26 and 26a are expansion valves, and 27 is a load side water heat exchanger.

Further, 28 is a circulation pump for transporting load water;
9 and 29a are electromagnetic valves related to control valves, 30 is a hot water supply pump, 31 is a hot water outlet pipe, and 32 is a hot water intake pipe.

Further, 43 is a control circuit, and 44 to 48 are wirings.

That is, the compressor 21 related to the refrigerant compressor, during cooling, passes the refrigerant through the heat source side water heat exchanger 23, the check valve 24, and the liquid receiver 25 under the control of the four-way valve 22.
The pressure is reduced by the expansion valve 26, and the load side water heat exchanger 27
After exchanging heat with the four-way valve 22, the cycle returns to the compressor 21.

In addition, during space heating and hot water heating, the refrigerant circulation direction is switched by the four-way valve 22 so that the heat source side water heat exchanger 23 becomes an evaporator and the load side water heat exchanger 27 becomes a condenser. It passes through the valve 24a and the expansion valve 26a.

The above-mentioned discharge pipe 7 and return pipe 8 are connected to the heat source side water heat exchanger 23, and water from the pumping well 4 is used as loaded water.

In addition, a return pipe 16 is provided in the load side water heat exchanger 27.
Circulation pump 28 as a water pump that absorbs more water
The water that is sent from the source becomes the load water.

This load water is so designed that the water channel can be switched by solenoid valves 29 and 29a, and the water pipe 12 side is opened during cooling and heating, and the water pipe 14 side is opened when heating hot water, so that they are opened and closed in a contradictory manner. be.

When hot water is being supplied, the solenoid valve 29a is closed and the hot water pump 30 is connected from the hot water pipe 14 side to the hot water pipe 10 side.
The hot water tank 2 is configured to send hot water to the hot water tank 2 shown in FIG. 1 above.

That is, the hot water pipe 14 is branched into communication with a hot water outlet pipe 31 of the solenoid valve 29a and a hot water intake pipe 32 of the hot water supply pump 30.

In addition to the above, the control system of the air-conditioning, heating, and hot-water supply device according to the embodiment of the present invention will be described.
1 is provided to perform operations such as switching between cooling and heating operations, setting hot water heating, and starting and stopping the main body 1, and is connected to a control circuit 43 of the main body 1 through a wiring 42.

The water pump 5 is connected to a control circuit 43 through wiring 44 so that water pumping is controlled.

In addition, a compressor 21, a circulation pump 28, a solenoid valve 2
9, 29a and the hot water pump 30 are connected to the wiring 4.
5, 46, 47, and 48 are connected to the control circuit 43 as shown in the figure, and its operation is controlled.

The compressor 21 described above is connected to the circulation pump 2
8. It is set to be driven for the first time when the water pump 5 is controlled to be in the water supply state.

In the configuration of the above-described embodiment, the inside of the hot water storage tank 2 is open to atmospheric pressure at the water surface, as described above.In other words, the load water circulation path during hot water heating is used to maintain pressure inside the hot water storage tank 2. Abnormally high pressure is avoided by opening the

In addition, the water pipe 12, fan coil unit 3,
Since the return pipe 13 communicates with the return hot water pipe 15, the load water during cooling and heating that circulates through the return pipe 13 is also avoided from abnormally high pressure.

By the way, when the load water system during cooling and heating becomes abnormally low pressure due to piping resistance, etc., especially when the water temperature is high during heating, boiling occurs in the load water system and the load water is interrupted at that point, causing the load water circulation to be interrupted. becomes impossible.

Regarding this point, in the present invention, at the return port to the main body 1, that is, the return pipe 16, where the pressure is particularly low,
Since the internal pressure of the hot water storage tank 2 is necessarily opened to atmospheric pressure, the load water system is maintained above atmospheric pressure, and abnormally low pressure is also avoided.

Further, the above-mentioned return pipe 16 has a single structure in which the return pipe 13 and the return water pipe 15 are joined, or in other words, the return pipe 13 and the return water pipe 15 are branched from the return pipe 16. This contributes to the simplification of the piping, and in conjunction with this, the circulation pump 28 can be used for both hot water heating and air conditioning. .

The above not only simplifies the piping and simplifies the construction work, but also eliminates the need for special equipment such as safety valves for pressure guarantee, making it possible to simplify the piping system by layering it and stabilize it. It is something.

Taking all the above into account, when the present invention is used, the atmospheric pressure at the water surface inside the hot water storage tank 2 is released, and the load water circulation path during hot water heating is avoided from abnormally high pressure, and the load water circulation path during cooling and heating is avoided from abnormally high pressure. Since the water return pipe 13 communicates with the return water pipe 15, this is also avoided from abnormally high pressure. Since the pipe 16 is always open to the internal pressure of the hot water tank 2, that is, atmospheric pressure,
The load water system is maintained at a pressure higher than atmospheric pressure, thereby making it possible to avoid abnormally low pressure that would make load water circulation impossible.
is a single configuration in which the return water pipe 13 and the return hot water pipe 15 are joined, in other words, the return water pipe 13 and the return hot water pipe 15 are configured by branching from the return pipe 16, so the piping is This contributes to the simplification of
Furthermore, along with this, the circulation pump 28 can be used for both hot water heating and cooling/heating;
We aim to provide an air conditioning, heating, and water heating system that not only simplifies the piping and simplifies construction work, but also eliminates the need for special equipment such as safety valves for pressure assurance, making it possible to simplify the piping system and make it safer. This invention can be said to have excellent practical effects.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory system diagram of an air conditioning, heating, and hot water supply apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a heat exchange system of the main body. 1... Body, 2... Hot water storage tank, 3... Fan coil unit, 10... Hot water pipe, 12... Water pipe,
13...Return pipe, 14...Water supply pipe, 15...Return pipe, 16...Return pipe, 21...Compressor, 22...
Four-way valve, 23... Heat source side water heat exchanger, 26, 26
a... Expansion valve, 27... Load side water heat exchanger, 28
...Circulation pump, 29, 29a...Solenoid valve.

Claims (1)

[Claims] 1 A refrigerant cycle is constituted by the compressor 21 related to the refrigerant compressor, the load side water heat exchanger 27, the expansion valves 26, 26a, the heat source side water heat exchanger 23, and the four-way valve 22, and the load side water heat exchanger The hot water storage tank 2 and the fan coil unit 3 are connected in parallel to the water tank 27, and a circulation pump 28 is provided to send load water from the hot water tank 2 and the fan coil unit 3 to the load side water heat exchanger 27. In a device equipped with electromagnetic valves 29 and 29a for selectively sending water from the side water heat exchanger 27 to the hot water storage tank 2 and the fan coil unit 3, the return hot water associated with the hot water heating return pipe from the hot water storage tank 2 is The pipe 15 and the return pipe 13 related to the cooling/heating return pipe from the fan coil unit 3 are joined to form a return pipe 16 related to a single load water return pipe,
The inside of the hot water storage tank 2 is opened to atmospheric pressure at the water surface, so that the pressure related to the return pipe 16 is released into the hot water storage tank 2 during both hot water heating and cooling/heating. Air conditioning, heating, and hot water equipment.