JPH10185226A - Hot water feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplifying pipe arranging work while enabling the use of a mixing tap to be reduced and while enabling hot water to be fed at different temperatures, respectively, with respect to a plurality of utilization parts. SOLUTION: This hot water feeder is provided with a heat exchanger 1, a proportional valve 8 for adjusting an amount of a heating medium liquid to be supplied to this heat exchanger 1, a water feed pipe 4 connected to a water feed inlet port 1C of the heat exchanger 1, a first hot water feed pipe 5 connected to a first hot water discharge port 1D of the heat exchanger 1 to supply hot water generated by the heat exchanger 1 to a first utilization part, and a first temperature sensitive member 7 for detecting a hot water temperature of the first hot water feed pipe 5 and controlling an opening degree of the proportional valve 8 in response to the hot water detected. Further, this hot water feeder is provided with a branching hot water feed pipe 9 branching from the first hot water feed pipe 5, a branching water feed pipe 10 branching from the water feed pipe 4, a mixing means 11 which is provided at a connection between the branching hot water feed pipe 9 and the branching water feed pipe 10, and which mixes hot water from the branching hot water feed pipe 9 with water from the branching water feed pipe 10 to supply the mixed water to a second utilization part through a second hot water feed pipe 13, and a second temperature sensitive member 15 for detecting a temperature of the water-hot water mixture in the second hot water feed pipe 13 and for controlling the mixing means 11 to change a mixing degree in the mixing means 11 in response to the detected temperature.

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 apparatus using a heat exchanger such as a plate heat exchanger for generating hot water by exchanging heat between a heat medium and water, and more particularly to a hot water supply apparatus which is always supplied from a common energy center. The supplied heat medium liquid is distributed and supplied to each house of an apartment house or the like, and the distributed heat medium liquid is supplied to tap water or the like by a heat exchanger such as a plate heat exchanger installed in each house. The present invention relates to a hot water supply device that exchanges heat with water and supplies hot water generated by the heat exchanger to a use unit such as a bath, a washroom, or a kitchen.

[0002]

2. Description of the Related Art As a conventional hot water supply apparatus of this type, for example, as disclosed in Japanese Patent Application Laid-Open No. 64-63751, a heat medium supply pipe for supplying a heat medium liquid from an energy center, A heat medium return pipe for returning the medium to the energy center; a proportional valve provided on the heat medium supply pipe; and a constant temperature heat medium supplied from the heat medium supply pipe and tap water supplied from a water supply pipe. A plate-type heat exchanger for generating hot water by exchanging heat with water, a hot-water supply pipe connected to the plate-type heat exchanger and supplying hot water generated by the plate-type heat exchanger to a utilization unit, and a hot-water supply pipe And a temperature sensing member that detects the temperature of the hot water and controls the opening of the proportional valve according to the detected temperature.

[0003]

In the conventional hot water supply apparatus described above, a relatively high temperature (for example, about 60 ° C.) hot water having the same temperature is supplied to a plurality of utilization sections, and the hot water is supplied to a place where the hot water is used. The temperature was lowered to the required temperature by a mixing faucet. Therefore, in order to be able to supply hot water at the required temperature, not only an expensive mixing faucet was required, but also multiple pipes of hot water pipes and water pipes had to be installed in each utilization section. .

[0004] The present invention has been made in view of the above-mentioned circumstances, and it has been made possible to supply hot water of different temperatures to a plurality of utilization parts, thereby reducing the use of mixed faucets, The purpose is to be able to simplify.

[0005]

According to the first aspect of the present invention, there is provided a heat exchanger for exchanging heat between a heat medium and water, and a supply amount of the heat medium supplied to the heat exchanger. A proportional valve,
A water supply pipe connected to a water supply inlet of the heat exchanger, a first water supply pipe connected to a hot water supply outlet of the heat exchanger, and supplying hot water generated by the heat exchanger to the first utilization unit; and a first hot water supply pipe A first temperature-sensing member that detects the hot water temperature of the first water supply and controls the valve opening of the proportional valve according to the detected temperature; a branch water supply pipe branched from the first water supply pipe; and a branch water supply pipe branched from the water supply pipe. Is provided at a connection between the branch hot water supply pipe and the branch hot water supply pipe, mixes hot water from the branch hot water supply pipe with water from the branch hot water supply pipe, and supplies the mixed water to the second utilization section via the second hot water supply pipe. A second mixer for controlling the mixing device to detect the mixing device to be supplied and the temperature of the mixed water in the second hot water supply pipe and to change the degree of mixing of the mixing device according to the detected temperature;
This is a configuration including a temperature sensing member.

According to the second aspect of the present invention, a heat exchanger for exchanging heat between a heat medium and water, a proportional valve for adjusting a supply amount of the heat medium supplied to the heat exchanger, A water supply pipe connected to the water supply inlet of the exchanger and a hot water supply outlet of the heat exchanger,
First to supply the hot water generated by the heat exchanger to the first utilization unit
A hot water supply pipe, a first temperature sensing member that detects hot water temperature of the first hot water supply pipe, and controls a valve opening of the proportional valve according to the detected temperature;
A branch hot water supply pipe branched from the first hot water supply pipe, a branch water supply pipe branched from the water supply pipe, and a connecting portion between the branch hot water supply pipe and the branch water supply pipe, wherein hot water from the branch hot water supply pipe and water from the branch water supply pipe are provided. And a mixing device that supplies the mixed water to the second utilization section through the second hot water supply pipe, and detects the temperature of the mixed water in the second hot water supply pipe, and determines the degree of mixing of the mixing apparatus according to the detected temperature. A second temperature sensing member that controls the mixing device to change the
The first temperature sensing member is provided near a hot water supply outlet of the heat exchanger.

According to a third aspect of the present invention, the heat exchanger is a plate heat exchanger.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG.
Reference numeral 1 denotes a plate heat exchanger formed by stacking a plurality of plates and alternately forming a primary flow path through which a heat transfer fluid flows and a secondary flow path through which water flows, and 2 denotes a plate heat exchanger 1 A heat medium supply pipe connected to the heat medium inlet 1A and supplying a heat medium liquid (for example, hot water controlled at a substantially constant temperature of about 90 ° C.) from the energy center to the plate heat exchanger 1; 3
Is a heat medium return pipe connected to the heat medium outlet 1B of the plate heat exchanger 1 for returning the heat medium liquid after heat exchange in the plate heat exchanger 1 to the energy center, and 4 is a plate heat exchanger. 1 is connected to a water supply inlet 1C, and a water supply pipe for supplying tap water to the plate heat exchanger 1; 5 is connected to a hot water supply outlet 1D of the plate heat exchanger 1 and supplied with a heat medium by the plate heat exchanger 1 A first hot water supply pipe 6 for supplying hot water generated by heat exchange with the heat transfer medium from the pipe 2 to a first use section (not shown) such as a bathtub;
Is a first usage part hot water supply faucet connected to the end of the first hot water supply pipe 5.

Reference numeral 7 denotes a first temperature sensing member such as a temperature sensor which is provided near the hot water supply outlet 1D of the plate heat exchanger 1 and detects the temperature of hot water flowing through the first hot water supply pipe 5, and 8 denotes the heat medium outlet. 1B is a proportional valve provided in the middle of the heat medium return pipe 3 and the valve opening of the proportional valve 8 is automatically controlled according to the temperature detected by the first temperature-sensitive member. The flow rate of the heat medium flowing in the heat exchanger 1 is adjusted, and the temperature of the hot water flowing through the first hot water supply pipe 5 is set to a substantially constant temperature (for example,
(About 60 ° C.). Further, the proportional valve 8
Is provided in the middle of the heat medium return pipe 3, but may be provided in the middle of the heat medium supply pipe 2 close to the heat medium inlet 1A.

Reference numeral 9 denotes a branch hot water supply pipe branched from the middle of the first hot water supply pipe 5; 10 denotes a branch water supply pipe branched from the middle of the water supply pipe 4; 11 denotes a connecting portion between the branch hot water supply pipe 9 and the branch water supply pipe 10. , A hot water mixing valve (mixing device) provided with a first water inlet 12A to which the branch hot water supply pipe 9 is connected, and a hot water mixing valve 11 to which the branch water supply pipe 10 is connected. It has an outlet 12C to which the second inlet 12B and the second hot water supply pipe 13 are connected, and mixes hot water from the branch hot water supply pipe 9 and tap water from the branch hot water supply pipe 10, and mixes the mixed water. The water is supplied to a second use unit (not shown) such as a washroom or a kitchen via the second hot water supply pipe 13.

Reference numeral 14 denotes a second-use-port hot-water tap connected to the end of the second hot-water supply pipe 13, and reference numeral 15 denotes a second hot-water supply pipe 13 provided near the outlet 12 C of the hot-water mixing valve 11. The second temperature sensing member 15 is a second temperature sensing member such as a temperature sensor for detecting the temperature of hot water flowing through the hot water supply pipe 15. The hot water mixing valve 11 is controlled to change the degree of mixing with tap water so that hot water can be supplied at the temperature set by the temperature setting means (not shown).

In the above-described configuration, first, when the faucet 6 for hot water supply of the first utilization section is opened, tap water from the water supply pipe 4 is supplied to the water supply inlet 1.
C, the tap water is supplied into the plate heat exchanger 1, and when this tap water flows through the secondary flow path of the plate heat exchanger 1, the tap water exchanges heat with a heating medium at about 90 ° C. flowing through the primary flow path. The hot water exits from the hot water supply outlet 1D, flows into the first hot water supply pipe 5, and is supplied to the first usage section (not shown) such as a bathtub from the first usage section hot water supply faucet 6. Here, the temperature of the hot water flowing out of the hot water supply outlet 1D of the plate heat exchanger 1 is detected by a first temperature-sensitive member 7, and the proportional valve 8 is controlled according to the detected temperature of the first temperature-sensitive member 7. The valve opening is automatically controlled. That is, when the temperature detected by the first temperature-sensitive member 7 is higher than about 60 ° C., the proportional valve 8 is controlled so that the valve opening includes the fully closed position. Is lower than about 60 ° C., the valve opening is greatly controlled to include the fully open position, and the plate-type heat exchanger 1
The temperature of the hot water flowing through the first hot water supply pipe 5 is maintained at a substantially constant temperature of about 60 ° C. by adjusting the flow rate of the heat medium liquid flowing through the inside. Therefore, hot water at a temperature of about 60 ° C. can be supplied from the first usage unit hot water supply faucet 6.

Next, a case where the second usage unit hot water supply faucet 14 is opened will be described. When this second use part hot water supply faucet 14 is opened, hot water of a temperature of about 60 ° C. in the first hot water supply pipe 5 passes through the branch hot water supply pipe 9 and enters the hot water mixing valve 11 from the first inlet 12A, while The tap water of the water supply pipe 4 passes through the branch water supply pipe 10 and enters the hot water mixing valve 11 from the second inlet 12B, and the hot water and the tap water are mixed in the hot water mixing valve 11, and the mixed water is supplied to the outlet 12C. And flows into the second hot water supply pipe 13,
Hot water is supplied from the hot water supply faucet 14 to a second usage unit (not shown) such as a washroom or a kitchen.

Here, the temperature of the mixed water flowing out from the outlet 12C of the hot water mixing valve 11 is detected by the second temperature sensing member 15, and the temperature of the hot water mixing valve 11 is reduced to the detected temperature of the second temperature sensing member 15. Accordingly, the degree of mixing between the hot water from the branch hot water supply pipe 9 and the tap water from the branch hot water supply pipe 10 is controlled. Therefore, from the hot water supply faucet 14 of the second utilization part, it is possible to perform water supply to water supply at a desired temperature of about 60 ° C. or less set by the temperature setting means (not shown).

In the above description, the first usage unit hot water supply faucet 6
Although the case where the water supply faucet 14 and the second water supply faucet 14 are individually opened has been described, the water supply faucet 6 for the first use part and the water supply faucet 14 for the second use part can be simultaneously opened to supply water at two places at the same time. .

Further, even during hot water supply standby, the proportional valve 8
The valve opening of the first temperature sensing member 7 is automatically controlled in a state including the fully closed state in accordance with the detected temperature, and the plate-type heat exchanger 1
Is performed.

According to the present embodiment, the plate heat exchanger 1 for exchanging heat with the tap water at about 90 ° C. from the energy center supplied from the heat medium supply pipe 2 and the plate heat exchanger 1 A proportional valve 8 provided in the heat medium return pipe 3 for adjusting the supply amount of the heat medium liquid supplied to the heat exchanger 1, a water supply pipe 4 connected to a water supply inlet 1C of the plate heat exchanger 1, and A first hot water supply pipe 5 that is connected to a hot water supply outlet 1D of the plate heat exchanger 1 and supplies hot water generated by the plate heat exchanger 1 to a first use unit such as a bathtub; A first temperature sensing member 7 for detecting the temperature and controlling the valve opening of the proportional valve 8 in accordance with the detected temperature; a branch water supply pipe 9 branched from the first water supply pipe 5; and a branch branched from the water supply pipe 4 The water supply pipe 10 is provided at a connection portion between the branch hot water supply pipe 9 and the branch hot water supply pipe 10, and the temperature from the branch hot water supply pipe 9. A branch water supply pipe 10 is mixed with tap water from the hot water mixing valve for supplying the second usage unit such as toilet and kitchen and the mixed water through the second hot water supply pipe 13 (mixing device)
And a second temperature sensing member 15 for detecting the temperature of the mixed water in the second hot water supply pipe 13 and controlling the hot water mixing valve 11 to change the degree of mixing of the hot water mixing valve 11 according to the detected temperature. It has a configuration.

With such a configuration, for example, a temperature of about 60 ° C. is applied to the first usage section such as a bathtub that requires a relatively high-temperature hot water supply.
Hot water at a desired temperature of about 60 ° C. or lower can be supplied to a second use section such as a washroom or a kitchen, etc. For this reason, it is possible to supply hot water at a desired temperature to the second use unit such as a washroom or a kitchen without the need for a mixing faucet, and it is possible to reduce the use of expensive mixed faucets, and to use the second utilization unit. Hot water supply and water supply can be performed without installing a plurality of hot water pipes and water supply pipes, so that piping work can be simplified.

Further, a first use unit such as a bathtub whose hot water supply temperature is set to a high temperature of about 60 ° C. and a second use unit such as a washroom or a kitchen where the hot water supply temperature is set lower than that. Since the arrangement can be eliminated, it is not necessary to go out of the room (for example, a bathroom) where the first usage unit is located in order to set the temperature of the first usage unit. It is easy to use because there is no way to change it elsewhere without your knowledge. Further, since the first temperature sensing member 7 for controlling the valve opening of the proportional valve 8 according to the detected temperature is provided near the hot water supply outlet 1D of the plate heat exchanger 1, the first hot water supply is provided. The hot water supply temperature on the high temperature side (about 60 ° C.) flowing through the pipe 5 can be accurately maintained, and during standby for hot water supply, the proportional valve 8 changes its valve opening in accordance with the detected temperature of the first temperature sensing member 7. Is automatically controlled in a state including the fully closed state, the temperature in the secondary flow path of the plate heat exchanger 1 is maintained at about 60 ° C. Abnormal high-temperature hot water supply due to the boiling phenomenon can be prevented.

[0020]

According to the first aspect of the present invention, there is provided a heat exchanger for exchanging heat between a heat medium and water, and a proportional means for adjusting a supply amount of the heat medium supplied to the heat exchanger. A valve, a water supply pipe connected to a water supply inlet of the heat exchanger, a first water supply pipe connected to a hot water supply outlet of the heat exchanger, and supplying hot water generated by the heat exchanger to the first utilization unit; (1) A first temperature sensing member for detecting a hot water temperature of a hot water supply pipe and controlling a valve opening of a proportional valve according to the detected temperature, a branch hot water supply pipe branched from the first hot water supply pipe, and a branch branched from the water supply pipe A hot water supply pipe, a hot water from the hot water supply pipe and a water from the hot water supply pipe, and the mixed water is supplied to the second hot water supply pipe via the second hot water supply pipe. In order to detect the mixing device to be supplied to the utilization unit and the mixed water temperature of the second hot water supply pipe, and to change the degree of mixing of the mixing device according to the detected temperature. Since the configuration is provided with the second temperature sensing member for controlling the combined device, hot water supply at two temperatures can be performed simultaneously according to the use unit. Hot water can be supplied at a temperature, the use of expensive mixing faucets can be reduced, and piping work can be simplified. In addition, it is possible to eliminate the hot water supply between the first use section having a high hot water supply temperature and the second use section having a lower hot water supply temperature, and the temperature setting of the second use section is changed by another. It is easy to use because it is not used.

According to the second aspect of the present invention, there is provided a heat exchanger for exchanging heat between a heat medium liquid and water, and a proportional valve for adjusting a supply amount of the heat medium liquid supplied to the heat exchanger. A water supply pipe connected to a water supply inlet of the heat exchanger, a first water supply pipe connected to a hot water supply outlet of the heat exchanger, and supplying hot water generated by the heat exchanger to the first utilization unit; A first temperature sensing member for detecting the hot water temperature of the pipe and controlling the valve opening of the proportional valve in accordance with the detected temperature, a branch hot water pipe branched from the first hot water pipe, and a branch water pipe branched from the water supply pipe And hot water from the branch hot water supply pipe and water from the branch hot water supply pipe are provided at a connection between the branch hot water supply pipe and the branch hot water supply pipe, and the mixed water is passed through the second hot water supply pipe to the second usage section. The temperature of the mixed water supplied to the mixing device and the second hot water supply pipe is detected, and the mixing degree of the mixing device is changed according to the detected temperature. A second temperature sensing member for controlling the apparatus, wherein the first temperature sensing member is provided near a hot water supply outlet of the heat exchanger. The hot water supply temperature of the hot water supply pipe can be accurately maintained, and the temperature of the hot water supply side of the heat exchanger can be maintained at a predetermined temperature while the hot water is on standby. Hot water supply can be prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot water supply apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate heat exchanger (heat exchanger) 1C Water inlet of plate heat exchanger 1D Hot water outlet of plate heat exchanger 4 Water supply pipe 5 1st hot water supply pipe 6 1st use part hot water supply faucet 7 1st temperature sensing Member 8 Proportional valve 9 Branch hot water supply pipe 10 Branch water supply pipe 11 Hot water mixing valve (mixing device) 12A First inlet 12B Second inlet 12C Outlet 13 Second hot water pipe 14 Second usage part hot water faucet 15 Second sense Warm material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshiaki Kaneko 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Yoshinobu Koga 2-chome Keihanhondori, Moriguchi-shi, Osaka No. 5-5 in Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A heat exchanger for exchanging heat between a heat transfer fluid and water;
A proportional valve that regulates the supply amount of the heat medium liquid supplied to the heat exchanger, a water supply pipe connected to the water supply inlet of the heat exchanger, and a water supply pipe connected to the hot water supply outlet of the heat exchanger, and are generated by the heat exchanger. A first hot water supply pipe for supplying the supplied hot water to the first use unit, a first temperature sensing member for detecting a hot water temperature of the first hot water supply pipe, and controlling a valve opening of the proportional valve in accordance with the detected temperature; A branch hot water supply pipe branched from the first hot water supply pipe, a branch water supply pipe branched from the water supply pipe, and a connecting portion between the branch hot water supply pipe and the branch water supply pipe, wherein hot water from the branch hot water supply pipe and water from the branch water supply pipe are provided. And a mixing device for mixing the mixed water and supplying the mixed water to the second utilization unit via the second hot water supply pipe;
A hot water supply device comprising: a second temperature sensing member that detects a temperature of the mixed water in the second hot water supply pipe and controls the mixing device to change the degree of mixing of the mixing device according to the detected temperature. 2. A heat exchanger for exchanging heat between a heat medium liquid and water;
A proportional valve that regulates the supply amount of the heat medium liquid supplied to the heat exchanger, a water supply pipe connected to the water supply inlet of the heat exchanger, and a water supply pipe connected to the hot water supply outlet of the heat exchanger, and are generated by the heat exchanger. A first hot water supply pipe for supplying the supplied hot water to the first use unit, a first temperature sensing member for detecting a hot water temperature of the first hot water supply pipe, and controlling a valve opening of the proportional valve in accordance with the detected temperature; A branch hot water supply pipe branched from the first hot water supply pipe, a branch water supply pipe branched from the water supply pipe, and a connecting portion between the branch hot water supply pipe and the branch water supply pipe, wherein hot water from the branch hot water supply pipe and water from the branch water supply pipe are provided. And a mixing device for mixing the mixed water and supplying the mixed water to the second utilization unit via the second hot water supply pipe;
A second temperature-sensing member for detecting the temperature of the mixed water in the second hot water supply pipe and controlling the mixing device to change the degree of mixing of the mixing device in accordance with the detected temperature; A hot water supply device provided near a hot water supply outlet of a water heater. 3. The hot water supply apparatus according to claim 1, wherein the heat exchanger is a plate heat exchanger.