JP2003254548A - Hot water supply apparatus for multiple dwelling houses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical hot water supply apparatus for multiple dwelling houses easily installed and low in running cost. <P>SOLUTION: In multiple dwelling houses having a plurality of dwelling units A, B and supplying hot water to a plurality of households with one hot water supply apparatus 1, the hot water supply apparatus 1 is provided with a mixing valve for mixing hot water with water supply to supply hot water of set temperature in a hot water storage tank unit 4 with a heat source such as an electric heater or a heat pump unit 2. A hot water supply faucet of each of the dwelling unit A, B supplied with hot water through the mixing valve is provided with a drop-in hot water supply faucet 29 for dropping hot water into a bathtub, and the drop-in hot water supply faucet 29 is provided with a quantitative cut-off valve 32 for automatically stopping the supply of hot water with the prescribed supply quantity of hot water. Consequently, the hot water supply shortage of the other household is positively prevented, and the hot water supply to a plurality of households is performed well with one hot water supply apparatus while suppressing a running cost. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device for an apartment house such as a condominium or an apartment, in which one hot water supply device is used for a plurality of dwelling units.

[0002]

2. Description of the Related Art Conventionally, in this type, as disclosed in, for example, Japanese Patent No. 2532319,
By combining one large hot water storage tank with a large number of water heaters, it was possible to efficiently supply hot water to the housing complex.

[0003]

By the way, in this hot water supply apparatus, an electric water heater is connected to the hot water supply side of the heat pump water heater, and hot water from the heat pump water heater is once supplied through the electric water heater. It is said that the conventional one requires a large installation space corresponding to the large size of the device, a complicated structure, a sophisticated and expensive control device, a large-scale installation work, and a cost. Had problems

[0004]

The present invention focuses on this point and solves the above-mentioned drawbacks. In particular, the structure is such that a hot water supply device for hot water supply for a plurality of households is provided in an apartment house having a plurality of dwelling units. In such a configuration, the hot water supply device is composed of a heat source such as an electric heater or a heat pump unit and a hot water storage tank unit, and a mixing valve for mixing hot water and hot water to supply hot water at a set temperature. It is equipped with a hot water tap that drops hot water into the bathtub at the hot water tap of each dwelling unit that supplies hot water through this mixing valve. Since it is equipped with a valve, it does not accidentally use a large amount of hot water, and it is possible to supply hot water with a hot water storage type water heater in the minimum unit of 2 households, installation work is easy and space is saved, Costly Not those that can provide extremely low cost.

In addition, an electric water heater is connected to the hot water supply side of the heat pump water heater so that hot water from the heat pump water heater is once supplied through the electric water heater to supply hot water. It is possible to supply hot water from two households to three households by mixing and supplying the hot water, and the electric water heater is not boiled from cold water but hot water at 60 degrees The water can be heated up to the desired temperature, the hot water can be efficiently supplied, the running cost is low, and the economical and good hot water can be obtained.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a hot water supply device for a housing complex according to the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 designates a single hot water supply device installed in an apartment house such as an apartment for supplying hot water to two households, and a heat pump unit 2 which constitutes a heat source for heating hot water in a refrigerant cycle using natural refrigerant (CO2). , A hot water storage tank unit 4 that communicates with a heat exchanger (not shown) for hot water in the heat pump unit 2 through a circulation circuit 3 and stores hot water by using late-night power. The heat pump unit 2 is hung on the ceiling 6 of the corridor 5 here.

The circulation circuit 3 is driven by a circulation pump (not shown) provided inside the heat pump unit 2.
The water supply in the two hot water storage tanks 7 and 8 is the outflow pipe 9 and the return pipe 1.
By circulating through 0, two hot water storage tanks 7, 8
It stores 300 liters of hot water in 150 liters each.

Reference numeral 11 is a water supply pipe for supplying water to the hot water storage tank 8 to which the outflow pipe 9 is connected, and has a water supply plug 12, a strainer 13, a water supply thermistor 14, and a pressure reducing valve 15.
It is connected to the bottom of the hot water storage tank 8.

Reference numeral 16 is a hot water supply pipe which is connected to the upper part of the hot water storage tank 7 to which the return pipe 10 is connected and which supplies high-temperature water to a hot water supply place as appropriate. A branch pipe 17 branched from the water supply pipe 11 is connected in the middle for mixing. A mixing valve 18 for adjusting the hot water outlet temperature to a fixed temperature of 60 degrees, a hot water supply thermistor 19 and a hot water supply flow rate sensor 20 are provided.

Reference numeral 21 is a connecting pipe for connecting the bottom of the hot water storage tank 7 to the upper portion of the hot water storage tank 8, 22 is a mechanical thermo switch provided at the outlet of the hot water storage tank 7 upper portion, and 23 is the hot water temperature in the hot water storage tanks 7, 8. Multiple thermistors for detection, 24
Is a relief valve with a negative pressure operated valve, 25 is each hot water storage tank 7,
Drain plugs communicating with the bottom of 8 and 26 are antifreezing heaters made of cement resistors attached to each freezing danger point.

Reference numeral 27 denotes a hot water supply pipe connected to the hot water supply pipe 16 of the hot water supply device 1, which is branched into two dwelling units A and B of two households, and a shower water hot water tap 28 capable of mixing with cold water at each end thereof, A hot water tap 29, a sink hot water tap 30, and a kitchen hot water tap 31 are provided in a bathtub (not shown).

Numeral 32 is a fixed water stop valve provided integrally with or separately from the drop-in hot water supply tap 29, which counts the amount of hot water supplied from the hot water supply device 1, and automatically stops the hot water supply at a predetermined amount of 200 liters in this case. In this way, it is possible to secure hot water supply for other households and prevent a sudden temperature drop due to reduction of hot water in the hot water storage. 33 is the entrance door of each dwelling unit A, B.

Next, the operation of this embodiment will be described. In the midnight power hours when the electricity charge is cheap, hot water is stored from the outflow pipe 9 by driving the circulation pump provided on the heat pump unit 2 side with water stored in the hot water storage tanks 7 and 8. The feed water in the hot water storage tank 7 is also circulated to the heat pump unit 2 through the tank 8 and the communication pipe 21, and is sequentially heat-exchanged into high-temperature water by the heat exchanger, and the hot water storage tank 7 and the communication pipe 21 are fed from the return pipe 10 to the hot water storage tank 7. It is returned to the inside of the hot water storage tank 8 through which 300 liters of 90 ° hot water is finally stored.

Further, this driving may be performed during a time zone set by timer control, or may be performed during an emergency regardless of the time zone.

When the hot water supply taps 28, 29, 30, 31 are opened, first, the hot water in the hot water storage tank 7 is mixed with the water supply by the mixing valve 18 and is supplied as hot water of 60 degrees. Of course, at this time hot water taps 28, 29, 3
On the 0, 31 side, the amount of mixing with cold water is set in order to reach the desired temperature. Since the mixing valve 18 is used for mixing and the hot water taps 28, 29, 30, 31 are also mixed, hot water is supplied. The actual amount of high-temperature water stored in the device 1 is small, and even a hot water supply device 1 having a hot water storage amount of about 300 liters can sufficiently supply hot water for two households.

Further, the hot water in the hot water storage tank 7 is replenished by the amount corresponding to the decrease in the hot water in the hot water storage tank 7,
The hot water in the hot water storage tank 8 is replenished with water by the amount corresponding to the decrease in the hot water, and the hot water is sequentially supplied by the push-up method. Of course, the hot water temperature in the hot water storage tank 7 is the highest, The hot water temperature is low in the order of hot water in the hot water storage tank 8, and there is a difference in hot water temperature.

When the drop-in hot water supply tap 29 is opened and a large amount of hot water is dropped into the bathtub, the quantity of hot water supply is counted by the constant water stop valve 32, and the hot water is supplied continuously by more than 200 liters. This is to automatically stop, so that you can prevent bathtub overflow when you forget to drop hot water, and surely prevent shortage of hot water in your own household, especially in other households, and reduce hot water costs for multiple households.
The hot water supply device 1 on the table is used to perform well, and the fixed stop valve 3
No. 2 is automatically reset when the hot water supply is stopped.

Further, it is possible to use an existing commercially available heat pump water heater without using a specially-designed water heater, the installation space is small, and the connection work is easy and can be used with confidence. It is a thing. In addition, this one embodiment is
The amount of hot water storage is too small for families, but it is suitable for singles and is suitable for single dormitories. By the way, the usage fee is fixed.

In this embodiment, the heat pump water heater is used as an example, but the present invention is not limited to this, and the same effect can be obtained with an electric water heater.

Next, another embodiment shown in FIG. 4 will be described.
In the hot water supply device 1 described above, not only the heat pump water heater but also the hot water supply pipe 35 of the heat pump water heater 34 is connected to the electric heater.
Connected to the inflow side of an electric water heater 37 having a heater 36,
The hot water from the pump water heater 34 is configured to be once supplied through the electric water heater 37.

With this configuration, 60 is provided when hot water is supplied.
The hot water from the heat pump water heater 35, which has been mixed every time, is further heated to 90 degrees in the electric water heater 37, and again supplied from the water supply pipe 38 and the mixing valve 39 to supply hot water. The amount of water can be further increased to supply hot water for 3 households and hot water for families, and the range of use is expanded. Moreover, since 60 degrees is 90 degrees, running costs are low and efficient hot water can be supplied. Is.

[0022]

As described above, according to the present invention, it is possible not only to prevent the bathtub from overflowing by forgetting to drop in hot water but also to surely prevent the shortage of hot water in one's own household, especially in other households, and reduce running costs while maintaining a plurality of households. The hot water supply can be performed well with one hot water supply device, and it can be done by using the existing heat pump hot water supply device on the market without using a specially designed hot water supply device. It is small, easy to connect and can be used with confidence.

According to claim 2, the amount of hot water supply is further increased to 3
Hot water for households and hot water for families can be provided, and the range of use can be expanded. Moreover, since the temperature is changed from 60 degrees to 90 degrees, running cost is low and efficient hot water can be supplied.

[Brief description of drawings]

FIG. 1 is an explanatory view of a hot water supply device for an apartment house showing an embodiment of the present invention.

FIG. 2 is a schematic sectional view of the water heater.

FIG. 3 is an explanatory view of the same piping.

FIG. 4 is a main part configuration diagram showing another embodiment.

[Explanation of symbols]

1 water heater 2 heat pump units 3 circulation circuit 4 Hot water storage tank unit 18 mixing valve 29 Drop water tap 32 fixed water stop valve 34 heat pump water heater 37 Electric water heater A, B dwelling unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Oyama             3-5 Umeda, Kita-ku, Osaka City, Osaka Prefecture             Wa House Industry Co., Ltd. (72) Inventor Ryusei Kishimoto             3-5 Umeda, Kita-ku, Osaka City, Osaka Prefecture             Wa House Industry Co., Ltd. (72) Inventor Souki Fukumuro             3-5 Umeda, Kita-ku, Osaka City, Osaka Prefecture             Wa House Industry Co., Ltd. F term (reference) 3L073 AA03 AA07 AA15 AA18 AB07                       AB09 AC01 AD08 AE05 AE07

Claims (2)

[Claims] 1. An apartment house having a plurality of dwelling units in which hot water supply for a plurality of households is performed by a single hot water supply device, wherein the hot water supply device is a heat source such as an electric heater or a heat pump unit. And a hot water storage tank unit, and equipped with a mixing valve that mixes hot water and hot water to supply hot water at a set temperature. A hot water supply device for a housing complex, which is provided with a plug, and further, this drop-in hot water supply plug is provided with a fixed water stop valve that automatically stops hot water supply when a predetermined amount of hot water is supplied. 2. The hot water supply device is characterized in that an electric water heater is connected to the hot water supply side of the heat pump water heater, and hot water from the heat pump water heater is once supplied through the electric water heater. Item 1. A hot water supply device for an apartment building.