JPS60155837A - Hot-water reserving tank and hot-water supplying system utilizing it - Google Patents

Abstract

PURPOSE:To permit to supply hot-water from the hot-water reserving tank with an arbitrary temperature by regulating the temperature with a mixing cock by a method wherein the heat exchanger for radiation of a heat pump is arranged in the lower part of the tank while an introducing unit, introducing water into a predetermined area, as well as first and second take- out units, taking cool water and hot-water out respectively, are provided in the system. CONSTITUTION:The hot-water reserving tank 1 is provided at a lower part in the tank with the heat radiating heat exchanger 12, included in the heat pump unit 6 as a refrigerant condenser, and an electric heater 13, utilized as an auxiliary heat source and operated by commercial electric source. The hot-water reserving tank 1 is provided also with a hot-water supplying path 2, supplying the hot-water into a bathtub 3 through an opening and closing valve 22 after mixing the hot-water at the upper part in the tank, which is taken out of a take-out unit provided at the upper part of the tank 1, with cool water at the bottom of the tank, which is taken out of the take-out unit provided at the lowermost part of the tank 1, another hot-water supplying path 4, branched on the way of the hot-water supplying path 2 or the upstream side of the mixing cock 21 and supplying hot-water into the bathtub 3 through the opening and closing valve 41, and a water feeding path 5, feeding the city water into the hot-water reserving tank 1 through a city water pipe 51.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field to which the Invention Pertains] The present invention relates to a hot water supply system, and particularly to a hot water storage tank that produces hot water using a heat pump heat source, and a hot water supply system using the same.

[Prior art]

Traditionally, home hot water systems typically supply water to kitchens, bathrooms, etc. from a hot water storage tank with a built-in small boiler or a hot water storage tank with a built-in heater that uses surplus electricity late at night.
The energy cost is high.

[Purpose of the invention]

The present invention focuses on the fact that heat pumps have recently been attracting attention as a means of realizing energy conservation, and aims to provide a new hot water storage tank that utilizes the heat source of this heat pump and a hot water supply system using the same. It is.

[Structure of the invention]

According to the present invention, a heat exchanger for heat dissipation of the heat pump is arranged at the lower part of the tank, and an introduction part for introducing water into a predetermined area below the same height as the heat exchanger, and an introduction part for introducing water into a predetermined area at or near the same height as the heat exchanger. A hot water storage tank is obtained that has a first outlet part that leads out cold water to the outside of the tank and a second outlet part that leads hot water out of the tank from the upper part of the tank. The hot water storage tank includes a first hot water supply path that mixes the cold water drawn out from the first outlet and the hot water drawn out from the second outlet with a mixing faucet, and then supplies the mixed water.
A hot water supply system is configured by a combination of the second outlet and a second hot water supply path that branches and supplies hot water between the mixing faucet.

〔Example〕

The present invention will be explained in detail below.

FIG. 1 is a schematic diagram of an embodiment in which the present invention is applied as a hot water supply system to a bathtub.

This hot water supply system consists of a hot water storage tank 1 that produces and stores hot water, hot water drawn from the top of the tank through a lead-out part provided at the top of the hot water tank 1, and hot water drawn out from a lead-out part provided at the bottom of the hot water storage tank 1. The cold water at the bottom of the tank is mixed with the mixing faucet 21, and then the hot water supply path 2 is supplied to the bathtub 3 through the on-off valve 22. Hot water supply line 4 that supplies hot water to the bathtub 3 through the valve 41. and a water supply channel 5 that supplies tap water from a water pipe 51 to the inside of the hot water tank 1 through a float valve j provided at the top of the hot water tank 1.

In the hot water storage tank 1, a heat exchanger 12 for dissipating heat as a refrigerant condenser included in a heat pump unit 6 is disposed in the lower part of the tank, and an electric heater 13 powered by a commercial power source is disposed as an auxiliary heat source. . heat pump unit 6
about.

Although a detailed explanation will be omitted, the temperature of the water in the upper part of the hot water storage tank is usually controlled to be maintained at a constant temperature, for example, about 65°C. The water level in the hot water tank 1 is kept constant by a float valve 11. Further, the tap water introduced through the float valve 11 is guided to the bottom of the tank by a water conduit 14 made of a material having heat insulating properties. The water guide pipe 14 extends from the upper part of the tank, which is higher than the water level in the tank, to the bottom, thereby preventing the temperature of the hot water near the hot water outlet from dropping due to water supply. In addition, a partition wall 15 having a large number of holes is provided at the bottom of the tank below the heat exchanger 12 for heat dissipation, and tap water is passed through the partition wall 15 through a water conduit pipe 14.
It is guided to the lower region of 4-. This prevents the introduced cold water and hot water from rapidly mixing and prevents significant fluctuations in the water temperature within the tank. 16 is a drain.

In the hot water supply path 2, a hot water supply pump 23 is provided in the hot water supply path between the upper outlet part and the branch point of the hot water supply route 4, and a cold water supply pump 23 is provided in the hot water supply path between the lower outlet part and the mixing faucet 21. 2
4 is provided, and in addition to hot water being supplied through the on-off valve 22, hot water can also be supplied from the hot water supply path 4 through the on-off valve 41. Namely.

Regarding the temperature distribution in the hot water storage tank 1, even if the temperature in the upper part of the tank reaches a set value, due to the convection phenomenon, the water temperature at the bottom of the tank, especially in the area below the partition wall 15, does not differ much from the temperature of the tap water introduced. In the mixing faucet 21, high temperature water from the upper outlet and cold water from the lower outlet are mixed at a predetermined ratio to maintain a constant temperature.

For example, it is set to provide hot water of about 45°C. Note that the pumps 23 and 24 are driven according to the supply of hot water to the bathtub 3. In this case, the on-off valves 22 and 41 may each be of a type like a normal faucet.

With this configuration, hot water is supplied by driving the pump 23 and opening the on-off valves 22 and 41 while checking the amount of hot water. That is, hot water at a temperature suitable for the bathtub is supplied from the hot water supply path 2, and high-temperature water is supplied from the hot water supply path 4 when heating the bathtub. Note that if the desired temperature cannot be obtained only with the heat radiation heat exchanger 12, the electric heater 13 is energized to heat it. In this way, hot water at a desired temperature can be supplied to the bathtub 3.

The present invention is not limited to the above-mentioned embodiments, and various modifications are possible. For example, the partition wall 15 may be omitted, or the water pipe 1
Even if the introduction position of the tap water according to No. 4 is at the same height as the heat exchanger 12 for heat radiation, fluctuations in the water temperature in the tank can be suppressed, and cold water can also be led out from the bottom of the tank. Further, the pumps 23 and 24 may be controlled to be driven and stopped in accordance with the opening and closing of the on-off valve 22 or 41. Furthermore, automatic hot water supply control can also be performed using a 9-order configuration. In order to control the heat pump 6, a signal from a temperature sensor installed in the upper part of the tank (not shown) is used, a level sensor is installed in the bathtub 3, and a solenoid valve is installed in parallel with the on-off valve 22 to control the following: Perform such control. That is, the pump 23 is driven and the solenoid valve is opened only while the water temperature in the upper part of the hot water tank is within a certain range, and when the level of the bathtub 30 rises to a certain value, the pump 23 is stopped and the solenoid valve is closed. You can automatically supply hot water at the desired temperature. It goes without saying that the object of hot water supply is limited to the bathtub.

〔Effect of the invention〕

As described above, according to the present invention, hot water from a hot water storage tank using an energy-saving heat pump can be supplied at any temperature using a mixing faucet. In addition, since high-temperature water from the hot water tank can be directly supplied without going through the mixing faucet, for example, in the case of a bathtub, it has the same effect as having a reheating function. Furthermore, since the mixing faucet can produce hot water at any temperature suitable for use in the bathroom or kitchen, the hot water tank can produce high-temperature water of 80°C or higher. This means that when compared to a hot water storage tank that produces hot water at a temperature of, for example, 45℃ = 7 degrees, the volume of the hot water storage tank can be reduced if the amount of hot water supplied is the same, making it possible to downsize the hot water storage tank. can.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the present invention. In the figure, 1 is a hot water tank, 3 is a bathtub, 6 is a heat pump unit, 12 is a heat exchanger for heat radiation, 2] is a mixing faucet, 23.24
is a pump. 8- Figure 1

Claims (1)

[Claims] 1. A heat exchanger for heat radiation of the heat pump is disposed at the lower part of the tank, an introduction part for introducing water into a predetermined area below the installation position of the heat exchanger, and an introduction part at or near the predetermined area. What is claimed is: 1. A hot water storage tank comprising: a first outlet section for discharging cold water from the tank to the outside of the tank; and a second discharging section for discharging hot water from an upper part of the tank to the outside of the tank. 2. In the hot water storage tank according to claim 1. The introduction part consists of a water supply channel that supplies tap water to the upper part of the tank above the water level through a float valve that maintains the water level in the tank at a constant level, and a conduit that guides tap water from the water supply channel to the bottom of the tank. A hot water storage tank characterized by comprising a water pipe. 3. A heat exchanger for heat dissipation of the heat pump is installed at the bottom of the tank, and there is an introduction part that introduces water into a predetermined area below the installation position of the heat exchanger, and an introduction part that introduces water from the predetermined area or near it to the outside of the tank. A hot water storage tank having a first deriving part for deriving warm water from the upper part of the tank and a second deriving part for deriving hot water from the upper part of the tank to the outside of the tank, cold water derived from the first deriving part and cold water being derived from the second deriving part. a first hot water supply path that mixes the heated water with a mixing faucet and then supplies the hot water;
A hot water supply system comprising: a second hot water supply path that branches and supplies hot water between the second outlet and the mixing faucet. 4. In the hot water supply system according to claim 3,
The first hot water supply path is characterized in that it includes a hot water supply pump provided upstream of the branch point, and a cold water delivery pump provided in the hot water supply path between the first delivery portion and the mixing faucet. Hot water system.