JPS5849767B2 - Heat pump water supply unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply and hot water supply unit using a heat pump.

In order to mix hot water and water to obtain hot water at the appropriate temperature for hairdressing or cooking, the hot water supply pipe and the water supply pipe extending from the water heater are connected to a hot water mixer faucet, and hot water at the desired temperature is supplied by operating the mixer faucet. I am trying to release it.

However, water heaters use gas or kerosene combustion or electric heaters as a heat source, and in either case, thermal efficiency is poor relative to fuel consumption or power consumption, and running costs are high.

In view of the above circumstances, the present invention utilizes a heat pump that dissipates a large amount of heat in relation to its power consumption, and furthermore, by making special improvements to the water supply pipe system, it is possible to significantly reduce running costs and improve the function of a hot water mixer faucet. To provide a water supply and hot water supply unit which can be fully utilized and can be easily installed.

The present invention will be specifically described below based on embodiments shown in the drawings.

The drawing shows a situation where the water supply and hot water supply unit 1 of the present invention is connected to a take-out pipe 7 in which a plurality of mixing faucets 73, 73 are provided in parallel.

The water supply and hot water supply unit 1 includes a known refrigeration cycle 2 configured by sequentially connecting a compressor 21, a condenser 22, a liquid receiver 23, an expansion valve 24, and an evaporator 25 with a pipe line in a unit housing 11, and further includes the above-mentioned refrigeration cycle 2. A closed temperature rising tank 3 housing a condenser 22, a pressure tank 4 communicating with the lower part of the temperature rising tank via a pipe 45, and a water storage tank 5 for supplying water to the pressure tank are provided.

In addition, a hot water supply pipe 46 and a pressure tank 4 are connected from the top of the temperature rising tank 3.
A water supply pipe 44 extends to the outside of the unit housing 11 from the lower part of the unit housing 11 .

The evaporator 25 is blown by an attached blower to exchange heat with outdoor air.

A conduit 42 that communicates the water storage tank 5 and the pressure tank 4 is provided with a check valve 43 and a pump 6 that allow flow only to the pressure tank 4 side.

The pump 6 is a pressure switch 4 installed in the pressure tank 4.
It is controlled by the signal No. 1, and operates when the tank internal pressure falls below the set value, and stops when it exceeds the set value.

Connecting the intake pipe 51 for connecting the water pipe 53 to the water storage tank 5,
A pole tap 52 is installed in the pipe 51 to keep the water level in the water tank 5 constant.

A return pipe 8 with a flow restricting device 81 is branched from a pipe line 42 a connecting the water tank 5 and the pump 6 and extends to the outside of the unit housing 11 .

The return pipe 8, the hot water supply pipe 46, and the water supply pipe 44 are provided with a connection port 4o for the extraction pipe 7 at their ends.

The extraction pipe 1 is an external hot water supply pipe 71. which connects the hot water supply pipe 46 and the return pipe 8. It is comprised of an external water supply pipe 72 connected to the water supply pipe 44 and a plurality of hot water mixing faucets 73, 13 provided in parallel between the external water supply pipe 72 and the external hot water supply pipe 71.

In this embodiment, the refrigeration cycle 2 of the water supply and hot water supply unit 1,
The cooling units 9 installed indoors are connected, and the indoor cooling is controlled by switching the valves as necessary.

That is, the evaporator 25 and compressor 2 of the refrigeration cycle 2
1 and the connecting pipe 28 with a switching valve 2o from the pipe 26 between the liquid receiver 23 and the expansion valve 24, respectively.
29 to the outside of the unit housing 11, and each connecting pipe 28
．． The inlet and outlet of the cooling unit 9 are connected to 29.

The cooling unit 9 has an expansion valve 91. This is a known type equipped with a heat exchanger 92 and a fan 93.

Thus, the hot water supply unit 1, the extraction pipe 7, and the cooling unit 9 are connected as shown in FIG. 1, and the switching valves 20 and 20 on the cooling unit 9 side are closed when the room is not being cooled.

When the refrigeration cycle 2 is operated, the high-pressure, high-temperature refrigerant gas compressed by the compressor 21 enters the condenser 22 in the heating tank 3, where it becomes a high-pressure refrigerant liquid and is guided to the liquid receiver 23, where it passes through the expansion valve. 24 and enters the evaporator 25, where the refrigerant liquid is converted to low-pressure refrigerant gas and sent to the compressor 2.
1 and completes one cycle.

During this time, the condenser 226 exchanges heat with the water in the heating tank 3 to raise the temperature of the water.

Water is supplied to the temperature rising tank 3 from the pressure tank 4, and the internal pressures of the temperature rising tank 3 and the pressure tank 4 are equal.

Therefore, the water pressures of the external water supply pipe 12 and the external hot water supply pipe 11, which communicate with the temperature raising tank 3 and the pressure tank 4, respectively, are naturally equal.

As a result, if the opening degree of the hot water mixer faucet 73 is kept constant, hot water and water can be mixed at an accurate constant ratio, and hot water at a desired temperature can be obtained.

In other words, the function of the hot water mixing faucet can be fully demonstrated.

When the water in the heating tank 3 decreases due to the use of hot water, water is replenished from the pressure tank 4, and when the tank internal pressure falls below the set value, the pump 6 is activated and water is supplied from the water storage tank 5. Therefore, the inside of the temperature rising tank 3 is always filled with water.

In addition, the external hot water supply pipe 71 is connected to the flow rate control device 81 inside the unit 1.
It communicates with the suction side of the pump 6 through a return pipe 8 with a holder, and every time the pump 6 operates, a part of the hot water in the external hot water supply pipe 71 flows into the unit 1 and circulates, so it does not affect the extraction pipe 1. By adjusting the flow rate of the flow restricting device 81 according to the surrounding temperature environment, the temperature of the hot water in the external hot water supply pipe 11 can be maintained at the required temperature.

When cooling the room at the same time as hot water supply, the switching valve 21 of the refrigeration cycle 2 is closed, and the two switching valves 2 on the cooling unit 9 side are closed.
Open 0.20.

The high-pressure, high-temperature refrigerant gas compressed by the compressor 21 enters the condenser 22 in the temperature raising tank 3, where it exchanges heat with the water in the tank as described above to raise the temperature of the water, and at the same time becomes a refrigerant liquid and receives the liquid. expansion valve 9 of the cooling unit 9.
1 and enters the heat exchanger 92, where it is converted to refrigerant gas and enters the compressor, completing one cycle.

When the refrigerant is gasified in the cooling unit 9, it absorbs heat from the surroundings, and the rotation of the fan 93 sends cool air into the room.

As described above, the present invention uses a heat pump that releases a large amount of heat compared to its power consumption to heat up the water in the heating tank 3, so running costs are significantly reduced and energy is also saved from the primary energy perspective. become.

In addition, the temperature rising tank 3 and the water supply pipe 44 are connected via the pressure tank 4.
By sending water to the water supply pipe 44 and the water pressure of the hot water supply pipe 46 extending from the temperature rising tank 3, the water pressure is equalized. By connecting the hot water mixer tap 73 to the hot water supply pipe and the water supply pipe, Hot water and water can be mixed in proportions exactly proportional to the degree of opening of the mixing faucet 73.

Furthermore, since it is provided with a return pipe 8 that returns the hot water in the external hot water supply pipe 71 into the unit, by introducing high temperature hot water from the temperature rising tank while returning a part of the hot water into the unit, the external hot water supply pipe 71 can be returned to the unit. Since the hot water inside can be maintained at the required temperature and the necessary components have been assembled into one unit, all that is required is to transport it to the construction site and connect it to the extraction piping 7 that has been installed at the site in advance. It has a number of excellent effects, such as being easy to install and requiring only a single step.

[Brief explanation of drawings]

FIG. 1 is a piping system diagram in which the water supply and hot water supply unit is connected with the extraction piping and the cooling unit. 2... Refrigeration cycle 3... Temperature rising tank, 4...
Pressure tank, 5...water tank, 6...pump.

Claims (1)

[Claims] 1 Compressor 21. A heat pump cycle in which a condenser 22, a liquid receiver 23, an expansion valve 24, and an evaporator 25 that exchanges heat with outdoor air are connected in sequence through pipes, and a temperature rising tank 3 that generates hot water through heat exchange with the condenser 22; Water is supplied from the water storage tank 5 by a pump 6 and a pipe 45 is connected to the temperature rising tank 3.
A pressure switch 41 is provided in the pressure tank and issues a signal to start or stop the pump 6 depending on changes in the internal pressure of the tank, and a pressure switch 41 extends from the pressure tank 4 and has a connection port at the tip. A water supply pipe 44 and a hot water supply pipe 46 that extends from the heating tank 3 and has a connection port at its tip.
and a return pipe 8 whose base end communicates with the water storage tank 5, passes through a flow restrictor 81, and has a connection port at its tip. 2. The heat pump water supply unit according to claim 1, wherein the hot water supply pipe 46 and the water supply pipe 44 are connected to a hot water mixing faucet 73. 3 The return pipe 8 is an external hot water supply pipe 71 equipped with a hot water mixing faucet 73
A heat pump type water supply and hot water supply unit according to claim 1 or 2, which is used for hair washing in a barber shop and is connected to a hot water supply pipe 46. 4. A cooling unit 9 storing an expansion valve 91 and a heat exchanger 92 in the pipe line of the heat pump cycle is connected in parallel with the evaporator 25 of the heat pump cycle. A heat pump type water supply unit described in the book.