JP2001165460A - Hot water supply equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hot water supply equipment to supply hot water, having a hot water demand temperature, to the utmost. SOLUTION: This hot water supply equipment comprises heating means consisting of a heat-exchange type heating part to heat hot water supplied through a high temperature water supply passage 7, and a control part for heating to control heating operation of a heating part to heat hot water to a temperature for heating higher than a hot water demand temperature; and a mixing means K consisting of a mixing part 5 to mix together high temperature water, heated by the heating part for supply, and low temperature water supplied through a low temperature water supply passage 3 and supply the hot water to a hot water passage 4, and a control part 6 for temperature to control regulation operation of the mixing part 5 so that the temperature of hot water mixed by the mixing part 5 is adjusted to a hot water demand value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating unit having a heat exchange type heating unit for heating hot water supplied through a high temperature water supply passage, and a heating control unit for controlling a heating operation of the heating unit. The present invention relates to a hot water supply system provided with a means.

[0002]

2. Description of the Related Art In a hot water supply system as described above, a mixing device that mixes hot water supplied through a high-temperature water supply channel and tap water supplied through a low-temperature water supply channel and supplies the mixed water to a heating section, and the mixing device A heat exchange type heating device for heating the mixed hot water mixed and supplied at the hot water supply system and supplying hot water to the hot water supply path;
There is known a hot water supply temperature detecting means for detecting a hot water temperature of hot water supplied from a hot water supply path, and controlling an adjusting operation of a mixing device so that a temperature detected by the hot water temperature detecting means becomes a required hot water temperature. (See, for example,
-119122). That is, in the hot water supply facility of the above publication, the mixed hot water mixed by the mixing device is supplied to the heating device and heated, and the heated hot water is directly supplied to the hot water through the hot water supply path, and the detection information of the hot water temperature detection means On the basis of this, the adjusting operation of the mixing device is controlled so that the hot water supply temperature becomes the required hot water temperature.

[0003] Incidentally, the hot water supply system described in the above publication is
Hot water heated using solar heat is stored in a hot-water boiler, and hot water is supplied from the hot-water boiler to a mixing device through a high-temperature water supply channel, and the mixing device supplies the mixed hot water to the hot water channel. It is configured to be freely switchable between a state in which hot water is supplied and a state in which mixed hot water is supplied to the heating device. When the temperature of the hot water supplied to the mixing device through the high-temperature water supply path is lower than the required hot water temperature, the mixed hot water mixed with the mixing device is switched to a state of being supplied to the heating device, and the mixing device is adjusted as described above. And when the temperature of the hot water is equal to or higher than the required hot water temperature, the mixed hot water mixed with the mixing device is switched to a state of supplying hot water to the hot water supply path, and the mixing device is adjusted and operated as described above to utilize the solar heat. Hot water at the required hot water temperature is supplied while using the heated hot water without heating it as much as possible.

[0004]

However, in the conventional hot water supply equipment, the hot water heated by the heating device is supplied as it is through the hot water supply path, and the adjusting operation of the mixing device is adjusted so that the hot water temperature reaches the required hot water temperature. When the temperature of the hot water supplied from the high-temperature water supply path is low, the heating device is heated by a heating device even if the heating device is heated with a constant heating amount. In some cases, the temperature of the heated hot water cannot be set to the required hot water temperature.
Therefore, even if the temperature of the hot water supplied from the high-temperature water supply passage is low, the temperature of the heated hot water heated by the heating device is set to the required hot water temperature in order to supply hot water at the required hot water temperature. It is conceivable to control the heating operation of the heating device, for example, if the heating amount of the heating device is adjusted so that the temperature of the heating hot water becomes the required temperature of hot and cold water, heating is performed even if the heating amount of the heating device is increased. It takes a long time to heat the heated hot water, and the temperature of the heated hot water does not rise immediately. The control delay of the temperature occurs, and the heated hot water that has caused the control delay is supplied as it is through the hot water supply path, and there is a possibility that the hot water at the required hot water temperature cannot be supplied.

The present invention has been made in view of such a point, and an object of the present invention is to provide a hot water supply facility capable of supplying hot water at a required hot water temperature as much as possible.

[0006]

In order to achieve this object, according to the first aspect of the present invention, hot water supplied through a high-temperature water supply path or low-temperature water supplied through a low-temperature water supply path is heated. Heating means comprising: a heat exchange type heating unit to be heated; and a heating control unit for controlling a heating operation of the heating unit so as to heat the hot water or the low-temperature water to a heating temperature higher than a required hot water temperature. A mixing unit that mixes the high-temperature water and the low-temperature water heated by the heating unit, or mixes the hot water, the high-temperature water, and the low-temperature water, and supplies hot water to the hot water supply path; and Mixing means including a temperature control unit for controlling the adjusting operation of the mixing unit so that the hot and cold water mixed in the mixing unit reaches the required hot water temperature is provided.

That is, regardless of the temperature of the hot water supplied from the high-temperature water supply path or the low-temperature water supplied from the low-temperature water supply path, the heating unit is heated to a heating temperature higher than the required hot water temperature. Heated hot water is supplied to the mixing section as high-temperature water, and the mixed hot water mixed in the mixing section is mixed with low-temperature water or mixed with hot water and low-temperature water such that the mixed hot water reaches the required hot-water temperature. Is supplied to the hot water supply channel, so that hot water at the required hot water temperature can be supplied regardless of the temperature of the hot water supplied from the high temperature water supply channel or the temperature of the low temperature water supplied from the low temperature water supply channel. It becomes possible. Then, even if the heating amount of the heating unit is increased or decreased, even if there is a delay in controlling the temperature of the heating hot water with respect to a change in the heating amount such that the temperature of the heating hot water does not immediately increase or decrease, the heating unit performs heating. The heated hot water supplied is not supplied through the hot water supply path as it is, but is supplied to the mixing section and mixed with the low-temperature water or mixed with the hot water and the low-temperature water so that the required hot water temperature is obtained. Since hot water is supplied through the road, hot water can be supplied at the required hot water temperature. Therefore, regardless of the temperature of the hot water supplied through the high-temperature water supply path or the temperature of the low-temperature water supplied from the low-temperature water supply path, the temperature of the heated hot water is immediately increased even if the heating amount of the heating unit is increased or decreased. Even if there is a delay in controlling the temperature of the heated hot water with respect to a change in the amount of heating that the temperature does not rise or fall, hot water at the hot water required temperature can be supplied, and hot water at the hot water required temperature can be supplied as much as possible. It became possible to provide hot water supply equipment.

According to the second aspect of the present invention, the heating means is configured to set a temperature higher than the required hot water temperature by a set temperature as the heating temperature and heat the hot water. I have. In other words, since the heating means is configured to set the heating temperature in accordance with the required hot and cold water temperature and heat the hot water, the temperature difference between the required hot and cold water temperature and the heating temperature can be kept constant. It is possible to heat the hot water supplied through the hot water supply channel to a high temperature with a constant temperature difference from the hot water demand temperature, and heat the hot water supplied through the hot water supply channel to a high temperature with a large temperature difference from the hot water demand temperature. Can be prevented, and wasteful heating of the hot water can be prevented. If you add a description,
When the heating temperature is set to a constant high temperature regardless of the required hot water temperature, if the required hot water temperature is set to a low temperature, the temperature difference between the required hot water temperature and the heating temperature increases, and The hot water supplied through the supply path will be heated to a high temperature where the temperature difference from the hot water demand temperature is large,
Although hot water will be wastefully heated, as described above, by keeping the temperature difference between the hot water demand temperature and the heating temperature constant, and heating the hot water to a constant high temperature difference between the hot water demand temperature and the hot water demand, It is possible to prevent unnecessary heating of the hot water.

According to the third aspect of the present invention, the heating means heats the hot water by setting a constant high temperature as the heating temperature irrespective of the required hot and cold water temperature. ing. That is, as in claim 2,
In order to set a temperature higher than the required hot water temperature by the set temperature as the heating temperature, it is necessary to configure an operating section for setting the required hot water temperature and the heating means so as to be freely communicable. Irrespective of the required temperature, a constant high temperature is set as the heating temperature and the hot water is heated, so that there is no need to configure an operating unit or the like for setting the required hot or cold water temperature and the heating means to be freely communicable. The configuration of the equipment can be simplified.

According to the fourth aspect of the present invention, the temperature detecting means for detecting the temperature of the hot water supplied through the high-temperature water supply path to the mixing means, and the heating means for heating the hot water or the low-temperature water. Switching means for switching between a heating supply state in which heating is performed in the mixing section and supplying to the mixing section, and a non-heating supply state in which the hot water is supplied to the mixing section without heating, and the temperature control section is provided. However, based on the detection information of the temperature detecting means, when the detected temperature is lower than the hot and cold required temperature, the switching means is switched to a heating supply state, the mixing unit is operated to adjust, and the detected temperature is When the temperature is equal to or higher than the required water temperature, the switching unit is switched to a non-heating supply state, and the mixing unit is adjusted and operated. That is, when the temperature of the hot water supplied through the high-temperature water supply passage is equal to or higher than the required hot water temperature, the hot water is supplied to the mixing unit without being heated by the heating unit, and the hot water mixed in the mixing unit is discharged. It is mixed with the low-temperature water supplied through the low-temperature water supply passage so as to reach the required hot-water temperature. When the temperature of the hot water is lower than the required hot-water temperature, the hot water or the low-temperature water is heated by the heating unit and mixed. The hot and cold water supplied to the mixing unit and mixed in the mixing unit is mixed with the low-temperature water supplied through the low-temperature water supply path or mixed with the hot water and the low-temperature water so that the required hot water temperature is reached. Become. Therefore, only when the temperature of the hot water supplied through the high-temperature water supply passage is lower than the required hot water temperature, the hot water or the low-temperature water is heated by the heating unit. Hot water can be supplied at the required hot water temperature while effectively utilizing the water without wasting it.

According to the fifth aspect of the present invention, a fluid heating unit having the heating means and a mixing unit having the mixing means are separately formed. Therefore, when installing the hot water supply equipment, the existing hot water supply can be used as the fluid heating unit, so that it is not necessary to newly provide a fluid heating unit having heating means, and the hot water supply equipment is provided using the existing hot water supply. Can be installed, and the cost for installing hot water supply equipment can be reduced.

According to the invention described in claim 6, the heating means and the mixing means are integrally formed as a hot water supply unit. That is, since the heating means and the mixing means are integrally formed as a hot water supply unit, when the hot water supply equipment is installed, compared with the case where the heating means and the mixing means are formed separately, This eliminates the need for installation work such as connection of the hot water supply, and facilitates the installation work of hot water supply equipment.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water supply system according to the present invention will be described with reference to the drawings as a first embodiment in which a heating means and a mixing means are formed separately. [First Embodiment] As shown in FIG.
Water heater 1 as fluid heating unit provided with heating means
And a mixing unit 2 provided with mixing means,
The water heater 1 and the mixing unit 2 are separately formed.

As shown in FIG. 2, the water heater 1 comprises a heat exchange type heating section 14 for heating hot water supplied through a water heater-side high-temperature water supply passage 7a, and the hot water having a temperature higher than a required hot water temperature. Heating unit 14 to heat to a high heating temperature
And a water heater remote controller R for instructing the heating controller 15 to issue control information and the like. The hot water supply unit T is configured to heat the hot water by setting a constant high temperature higher than the hot water requirement temperature as the heating temperature regardless of the hot water requirement temperature.

The mixing unit 2 mixes high-temperature water heated and supplied by the water heater 1 with low-temperature water supplied through the low-temperature water supply path 3 and supplies the mixture to the hot-water supply path 4. Mixing means K comprising a valve 5 and a temperature control section 6 for controlling the adjusting operation of the mixing valve 5 so that the mixed hot and cold water mixed by the mixing valve 5 becomes the required hot water temperature.
And hot water supplied through the high-temperature water supply path 7
A switching means 9 for switching between a heating and supply state in which the hot water is heated and supplied to the mixing valve 5 and a non-heating and supply state in which the hot water is supplied to the mixing valve 5 without heating; And a remote control 8 for the mixing unit for instructing the temperature control unit 6 of control information such as the required hot and cold water temperature.

The mixing unit 2 is provided with a high-temperature water supply path 7 for supplying hot water that is heated by utilizing solar heat or exhaust heat of combustion exhaust gas and stored in a hot water storage tank 30.
A low-temperature water supply path 3 for supplying water as low-temperature water and a hot-water supply path 4 for supplying mixed hot water mixed by the mixing valve 5 are provided. The hot water supply path 7 is provided with a supply hot water temperature thermistor 31 as temperature detection means for detecting the temperature of the hot water supplied through the high temperature water supply path 7, and the hot water supply path 4 detects the hot water supply temperature. A hot water supply temperature thermistor 32 is provided. The hot water supply path 7 is provided with a hot water supply side high temperature water supply path 7a for supplying the hot water to the water heater 1 and the hot water mixing valve 5.
And a hot-water supply-side opening / closing valve that can be opened and closed with the hot-water supply-side high-temperature water supply passage 7a. The mixing valve-side high-temperature water supply passage 7b is provided with a mixing valve-side opening / closing valve 9 that can open and close the mixing valve-side high-temperature water supply passage 7b.
b is provided.

That is, the water heater side opening / closing valve 9a and the mixing valve side opening / closing valve 9b act as switching means 9 to open the water heater side opening / closing valve 9a and close the mixing valve side opening / closing valve 9b. Heating the hot water by heating the hot water in the heating unit 14 and supplying the hot water to the mixing valve 5, and by closing the water heater side opening / closing valve 9 a and opening the mixing valve side opening / closing valve 9 b. It is configured to be able to be switched to a non-heating supply state for supplying to the mixing valve 5 without the need.

The mixing unit 2 includes a water heater 1
A water supply connection port 10 for connecting to the water supply port 1a of the water heater 1 and a water supply connection port 11 for connecting to the water supply port 1b of the water heater 1 are provided, and the water supply port 1a of the water heater 1 and the water supply of the mixing unit 2 are provided. A water heater water supply passage 12 that is connected to the connection port 10, and a water heater 1 a of the water heater 1 and the mixing unit 2
Water heater hot water supply path 13 connected to hot water supply connection port 11
Is provided. Hot water supplied to the mixing unit 2 through the high-temperature water supply path 7 is supplied to the water heater 1 through the water heater water supply path 12, and the heated hot water heated by the water heater 1 is supplied through the water heater water supply path 13 to the mixing unit 2. Is configured to be supplied.

When the detected temperature is lower than the required hot or cold water temperature, the temperature control section 6 opens the water heater side opening / closing valve 9a based on the detection information of the supply hot water temperature thermistor 31, and opens the mixing valve side opening / closing valve. 9b is closed to switch to the heating and supply state, the mixing valve 5 is operated to adjust, and when the detected temperature is equal to or higher than the required hot or cold water temperature, the hot water supply side on-off valve 9
The control valve a is closed and the mixing valve side opening / closing valve 9b is opened to switch to the non-heating supply state, so that the mixing valve 5 is adjusted. In addition, when the temperature detected by the supply hot water temperature thermistor 31 is lower than the required hot water temperature, the hot water supplied through the high temperature water supply path 7 is supplied to the water heater 1 and heated, and the heating by the water heater 1 is performed. The hot water is supplied to the mixing valve 5 and mixed with the water, and the mixing valve 5 is adjusted so that the temperature detected by the hot water supply temperature thermistor 32 becomes the required hot water temperature.
Is fed back and hot water at the required hot water temperature is supplied through the hot water supply path 4. When the temperature detected by the supply hot water temperature thermistor 31 is equal to or higher than the required hot water temperature, the hot water supplied through the high temperature water supply path 7 is directly supplied to the mixing valve 5 and mixed with the water. The mixing valve 5 is feedback-controlled so as to reach the required hot water temperature, and hot water at the required hot water temperature is supplied through the hot water supply path 4.

The water heater 1 includes a heat exchanger 17 for water heating provided in a combustion chamber 16 and a gas combustion type burner 18 for heating the heat exchanger 17. A fan 19 is provided, which allows ventilation of the combustion air from the upstream side of the fan 19 and the amount of ventilation of which can be adjusted, and detects the rotation speed of the fan 19.
And a heat exchanger 17 for water heating and a gas-fired burner 18 are configured to function as the heating unit 14. The heat exchanger 17 has a water inlet 20, which is connected to the water heater water supply passage 12, and a water heater water supply passage 1.
3 are connected to each other. The water inlet 20 has a water flow sensor 22 for detecting the amount of water flowing to the heat exchanger 17, and a hot water temperature thermistor 23 for detecting the temperature of hot water supplied through the water inlet 20.
Are provided, and the hot water supply path 1 is provided in the hot water supply path 21.
A heating hot water temperature thermistor 24 for detecting the temperature of the heating hot water discharged to the hot water 3 is provided.

A fuel supply passage 25 for the burner 18 is provided with an electromagnetically operated intermittent valve 26 for intermittently supplying fuel, and an electromagnetically operated gas amount control valve which is capable of changing and adjusting a fuel supply amount (burning amount of the burner 18). An igniter 28 for performing an ignition operation on the burner 18 and a frame rod 29 for detecting whether or not the burner 18 is ignited are provided near the burner 18.

The heating control section 15 starts the combustion of the burner 18 when the flow of water to the heat exchanger 17 is started, and stops the flow of water to the heat exchanger 17 when the flow of water to the heat exchanger 17 is stopped. In addition to controlling the combustion of the burner 18 to stop, the hot water path 2
The combustion amount of the burner 18 is adjusted so that the temperature of the heated hot water from the hot water 1 becomes the heating temperature.

More specifically, when the flow rate detected by the flow rate sensor 22 exceeds the set flow rate, the fan 19
And the intermittent valve 26 is opened to open and adjust the gas amount adjusting valve 27 to the ignition gas amount, and the igniter 28 ignites the burner 18 and the flame rod 29 Confirm. Thereafter, the incoming water temperature thermistor 23 and the heated water temperature thermistor 2
4. Based on the respective detection information of the water flow rate sensor 22, the amount of combustion of the burner 18 required for setting the temperature of the heated hot water to the heating temperature is calculated. Then, the gas amount adjusting valve 2 is adjusted so that the gas amount corresponds to the determined combustion amount.
7 and feed-forward control for adjusting and controlling the ventilation amount of the fan 19 so that the ventilation amount of the fan 19 is in an appropriate combustion state with respect to the adjusted gas amount. Feedback control for finely adjusting the opening of the gas amount control valve 27 is performed so that the detected temperature becomes the heating temperature.

In this way, when the temperature of the hot water is lower than the required hot water temperature in accordance with the temperature of the hot water supplied through the high temperature water supply passage 7, the heating unit 14 uses the heating unit 14 for heating which is higher than the required hot water temperature. Heated hot water heated to a temperature is supplied to the mixing valve 5 as high-temperature water, and low-temperature water supplied through the low-temperature water supply path 3 so that the mixed hot and cold water mixed by the mixing valve 5 reaches the required hot water temperature. Since the mixed hot and cold water is supplied to the hot water supply path 4, even if the temperature of the hot water supplied through the high-temperature water supply path 7 is low, it is possible to supply hot and cold water at the required temperature. Becomes
The heated hot water heated by the heating unit 14 is not supplied as it is through the hot water supply path 4, but is supplied to the mixing valve 5 and mixed with the low-temperature water before being supplied through the hot water supply path 4. Even if the heating amount of the heating unit is increased or decreased, even if there is a delay in controlling the temperature of the heating hot water with respect to a change in the heating amount that the temperature of the heating hot water does not immediately increase or decrease, the heating unit is heated. The heated hot water is not supplied through the hot water supply path as it is, but is supplied to the mixing section and mixed with low-temperature water so as to reach the required hot water temperature, and then supplied through the hot water supply path. It is possible to do. Therefore, even if the temperature of the hot water supplied through the high-temperature water supply passage is low, the heating amount of the heating hot water does not immediately increase or decrease even if the heating amount of the heating unit is increased or decreased. Even if the control of the temperature of the heated hot water with respect to the change occurs, hot water at the hot water required temperature can be supplied and hot water at the hot water required temperature can be supplied as much as possible. became.

When the temperature of the hot water supplied through the high-temperature water supply path 7 is equal to or higher than the required hot water temperature, the hot water is directly supplied to the mixing valve 5 as high-temperature water, and the mixed hot and cold water mixed by the mixing valve 5 is mixed. Is mixed with the low-temperature water supplied through the low-temperature water supply path 3 so that the temperature of the hot water reaches the required temperature, and the mixed hot water is supplied to the hot-water supply path 4. Hot water can be supplied at the required hot water temperature while using the hot water as much as possible without wasteful heating.

[Second Embodiment] The second embodiment is another embodiment of the first embodiment, and shows an example in which the heating means and the mixing means are integrally formed as a hot water supply unit. . Hereinafter, the second embodiment will be described with reference to the drawings. In addition, about the structure similar to the said 1st Embodiment, the same code | symbol is described and the detailed description is abbreviate | omitted.

As shown in FIG. 3, the hot water supply unit KY is provided with a heat exchange type heating section 14 for heating hot water supplied through the high temperature water supply path 7, and supplied by being heated by the heating section 14. A mixing valve 5 is provided as a mixing unit that mixes high-temperature water and low-temperature water supplied through the low-temperature water supply path 3 and supplies hot water to the hot-water supply path 4. The heating operation of the heating unit 14 is controlled so as to heat the hot water to a heating temperature higher than the required hot water temperature, and the mixing valve is controlled so that the mixed hot water mixed by the mixing valve 5 becomes the required hot water temperature. 5
A hot water supply control unit 33 for controlling the adjustment operation of the hot water supply unit is provided, and a remote control 34 for a hot water supply unit for instructing the hot water supply control unit 33 with control information such as the required hot water temperature is provided. .

The hot water supply path 7 is provided with a supply hot water temperature thermistor 31, a water flow rate sensor 22, and a heat exchanger 17 as a heating unit 14 in order from the upstream side, and the hot water supply path 4 has a hot water supply temperature thermistor. 32 are provided. The hot water supply controller 33 is configured to set a constant high temperature higher than the required hot water temperature as the heating temperature regardless of the required hot water temperature, and to control the heating operation of the heating unit 14 to heat the hot water. Have been.

The hot water supply control unit 33 operates in a non-heating supply state in which unheated hot water is supplied to the mixing valve 5 through the high-temperature water supply path 7 without heating the heating unit 14, and a heating operation is performed by heating the heating unit 14. The heating hot water is supplied to the mixing valve 5 through the water supply path 7 so as to be freely switched to a heating supply state. That is, the hot water supply control unit 33 is configured to act as the switching unit 9.

When the temperature detected by the supplied hot water temperature thermistor 31 is equal to or higher than the required hot water temperature, the hot water supply control section 33 does not heat the heating section 14 and passes the non-heated hot water through the high temperature water supply path 7 to the mixing valve 5. The mixing valve 5 is feedback-controlled so that the detected temperature of the hot water supply temperature thermistor 32 becomes the required hot water temperature, and hot water at the hot water required temperature is supplied through the hot water supply path 4. . More specifically, when the temperature detected by the supply hot water temperature thermistor 31 is equal to or higher than the required hot water temperature, the fuel gas and the combustion air are not supplied to the burner 18 so that the burner 18 is not burned. The hot water supplied through the heat exchanger 17 is supplied to the mixing valve 5 as high-temperature water without being heated by the heat exchanger 17 and mixed with the water, so that the detected temperature of the hot water supply temperature thermistor 32 becomes the required hot water temperature. Feedback control.

When the temperature detected by the supply hot water temperature thermistor 31 is lower than the required hot water temperature, the hot water supply control section 33 heats the heating section 14 to supply heated hot water to the mixing valve 5 through the high temperature water supply path 7. Then, the opening degree of the mixing valve 5 is adjusted so that the detected temperature of the hot water supply temperature thermistor 32 becomes the hot water demand temperature, and hot water at the hot water demand temperature is supplied through the hot water supply path 4. More specifically, in order to adjust the combustion amount of the burner 18 so that the temperature of the heated hot water heated by the heating unit 14 becomes the heating temperature, the detection information of the supply hot water temperature thermistor 31 and the water flow rate sensor 22 is used. Based on this, the opening degree of the intermittent valve 26 and the gas amount adjusting valve 27 and the operation of the fan 19 are feedforward controlled. In the high-temperature water supply path 7 between the heat exchanger 17 and the mixing valve 5, a heating water temperature thermistor for detecting the temperature of the heating water heated by the heat exchanger 17 is provided. In addition, based on the detection information of the heating hot water temperature thermistor,
Feedback control for finely adjusting the opening of the gas amount control valve 27 may be executed.

In this manner, the heating unit 1 heats the hot water supplied through the high-temperature water supply path 7 to the heating temperature.
4, the heated hot water heated by the heating unit 14 is supplied to the mixing valve 5 to be mixed with the water, and the mixing valve 5 is fed back so that the detected temperature of the hot water supply temperature thermistor 32 becomes the required hot water temperature. I try to control.

[Third Embodiment] This third embodiment is another embodiment of the first embodiment, and is configured to supply low-temperature water to the water heater 1 through the low-temperature water supply passage 3, and to provide a mixing unit. 2 is provided with a high-temperature water supply path 7.
Is configured such that hot water supplied through a hot water supply, high-temperature water heated and supplied by a water heater 1, and low-temperature water supplied through a low-temperature water supply path 3 are mixed and supplied to the hot water supply path 4. It shows. Hereinafter, the third embodiment will be described with reference to the drawings. In addition, about the structure similar to the said 1st Embodiment, the same code | symbol is described and the detailed description is abbreviate | omitted.

As shown in FIG. 4, the low-temperature water supply path 3 has a water-supply-side low-temperature water path 3a for supplying low-temperature water to the water heater 1 and a unit-side low-temperature water path for supplying low-temperature water to the mixing unit 2. It is branched and connected to the water channel 3b. And
In the water heater 1, a water heater-side low-temperature water supply passage 3 a is connected to a water supply port 1 a, and a water heater water supply passage 13 connected to a hot water supply connection port 11 of the mixing unit 2 is connected to the hot water supply port 1 a. The water as the low-temperature water supplied through the water heater-side low-temperature water supply passage 3 a is heated to a heating temperature and supplied to the mixing unit 2 through the water heater hot-water supply passage 13. Regarding the configuration of the water heater 1, the first
The configuration is the same as the configuration shown in FIG. 2 in the embodiment, and a detailed description thereof will be omitted.

The mixing unit 2 includes a mixing unit 2
A hot water passage 35 is provided which is connected to the hot water supply connection port 11 and supplies hot water heated by the water heater 1 to the mixing section 5. A valve 36 and a first water proportional valve 5a capable of opening and closing the heated hot water passage 35 are provided. The unit-side low-temperature water channel 3b includes check valves 37 and 38, a low-temperature water thermistor 39 that detects the temperature of low-temperature water supplied through the unit-side low-temperature water channel 3b, and a unit-side low-temperature water channel 3 from the upstream side.
Each of the second water proportional valves 5b that can freely open and close b is provided.

That is, the mixing section 5 is constituted by the first water proportional valve 5a and the second water proportional valve 5b, and the first water proportional valve 5a is heated by the hot water supplied through the high temperature water supply path 7 and the water heater 1. The second water proportional valve 5b is configured to mix the hot water supplied through the high-temperature water supply path 7 and the low-temperature water supplied through the unit-side low-temperature water path 3b. Have been. In addition, the first water proportional valve 5a also functions as the switching means 9, and opens the first water proportional valve 5a to heat the low-temperature water in the water heater 1 and supply the mixed water to the mixing section 5. ,
The first water proportional valve 5a is closed so that it can be switched to a non-heating supply state in which the hot water is supplied to the mixing section 5 without heating.

A supply hot water temperature thermistor 31 as a temperature detecting means is provided in the high temperature water supply path 7 upstream of a connection point with the heating hot water path 35, and a connection point between the heating hot water path 35 and the unit side is provided. A hot water thermistor 40 for detecting the temperature of the hot water mixed with the high temperature water heated by the water heater 1 and supplied through the high temperature water supply path 7 is provided in the high temperature water supply path 7 between the connection points with the low temperature water path 3b. Is provided. The hot water supply path 4 is provided with a water amount sensor 41 for detecting the amount of hot water flowing through the hot water supply path 4 and a hot water supply temperature thermistor 32 for detecting hot water supply temperature.

The temperature control unit 6 of the mixing unit 2
The opening degree of the second water proportional valve 5b is adjusted so that the temperature of hot water supplied to the hot water supply path 4 becomes the required hot water temperature, and based on the detection information of the supply hot water temperature thermistor 31,
The first water proportional valve 5a is configured to be adjusted to an open state or a closed state. That is, the temperature control unit 6
Based on the detection information of the supply hot water temperature thermistor 31, if the detected temperature is lower than the set temperature for heating state switching obtained by adding the set temperature for switching to the required hot and cold water temperature, the first water proportional valve 5a is opened to supply heat. State, the opening degree of the second water proportional valve 5b is adjusted, and when the detected temperature is equal to or higher than the heating state switching set temperature, the first water proportional valve 5a is closed to enter the non-heating supply state. Switch to the second
The opening of the water proportional valve 5b is adjusted.

To explain the adjustment of the opening degree of the second water proportional valve 5b, the temperature detected by the low-temperature water thermistor 39 and the temperature detected by the hot-water thermistor 40 when the water amount sensor 41 detects a water amount equal to or larger than a set amount. Of the second water proportional valve 5b such that the temperature of the hot and cold water obtained by mixing the hot water supplied through the high-temperature water supply path 7 and the low-temperature water supplied through the unit-side low-temperature water path 3b becomes the required hot water temperature, based on And a feedback control for finely adjusting the opening of the second water proportional valve 5b so that the detected temperature of the hot water supply temperature thermistor 32 becomes the required hot or cold water temperature. I have. When the water amount sensor 41 is detecting a water amount less than the set amount, the hot water supplied through the high-temperature water supply path 7 and the unit-side low temperature are detected based on the temperature detected by the low-temperature water thermistor 39 and the temperature detected by the hot-water thermistor 40. It is configured to execute feedforward control for adjusting the opening of the second water proportional valve 5b such that the temperature of the hot and cold water mixed with the low-temperature water supplied through the water passage 3b becomes the required hot and cold water temperature.

As described above, when the temperature detected by the supply hot water temperature thermistor 31 is lower than the set temperature for switching the heating state, the hot water supplied through the high-temperature water supply path 7 is supplied through the water heater-side low-temperature water path 3a, and The hot water is mixed with the heated hot water heated at 1 and is further mixed with the low-temperature water supplied through the unit-side low-temperature water supply passage 3b to be supplied to the hot water supply passage 4. When the temperature detected by the supply hot water temperature thermistor 31 is equal to or higher than the heating state switching temperature, the hot water supplied through the high temperature water supply path 7 is mixed with the low temperature water supplied through the unit side low temperature water supply path 3b. Hot water is supplied to the hot water supply path 4.

In the third embodiment, the supply hot water temperature thermistor 31 is set with reference to the heating state switching set temperature.
The first water proportional valve 5a is switched between the open state and the closed state based on the temperature detected by the hot water supply water temperature thermistor 31 based on the required hot water temperature. When the one-water proportional valve 5a is switched to the open state and the temperature detected by the supply hot water temperature thermistor 31 is equal to or higher than the required hot and cold water temperature, the first water proportional valve 5a may be switched to the closed state.

[Other Embodiments] (1) In the first to third embodiments, the hot water supplied through the high-temperature water supply path 7 is heated to a constant high temperature regardless of the required hot and cold water temperature. However, the hot water supplied through the high-temperature water supply path 7 may be heated to a temperature higher than the required hot water temperature by a set temperature. In this case, the remote controller 8 for the mixing unit and the remote controller for the water heater 1 are configured to be freely communicable, and the heating temperature is set to a temperature higher than the required hot water temperature by the set temperature.

(2) In the first to third embodiments, the hot or low-temperature water supply path 3 supplied through the high-temperature water supply path 7 is used.
Switching means for switching between a heating supply state in which low-temperature water supplied through the heater is supplied to the mixing valve 5 by heating in the heating section 14 and a non-heating supply state in which the hot water is supplied to the mixing valve 5 without heating. 9 to provide a supply hot water temperature thermistor 31
Is switched to one of the heating supply state and the non-heating supply state based on the detection information of the hot water supply path. Alternatively, the low-temperature water supplied through the low-temperature water supply path 3 may be heated by the heating unit 14 and supplied to the mixing unit.

That is, in the first embodiment, the high-temperature water supply path 7 is formed as a single path of the water heater-side high-temperature water supply path 7a for supplying the hot water to the water heater 1, and the hot-water supply-side high-temperature water supply path 7a is formed. The path 7a and the mixing valve side opening / closing valve 9b become unnecessary. In the second embodiment, the hot water supply control unit 33 is configured to always perform the heating operation of the heating unit 14 to supply heated hot water to the mixing valve 5 through the high-temperature water supply path 7. The third above
In the embodiment, the first water proportional valve 5a becomes unnecessary, and the hot water supplied through the high-temperature water supply path 7 is always mixed with the heated hot water heated by the water heater 1, and further, the unit-side low-temperature water supply path The hot water is supplied to the hot water supply path 4 after being mixed with the low-temperature water supplied through 3b.

(3) In the first to third embodiments, the temperature controller 6 of the mixing unit 2 or the hot water supply unit KY
The hot water supply control unit 33 is communicably connected to a hot water storage tank control unit for operating the hot water storage tank 30. For example, when the hot water storage tank 30 breaks down, the failure location is determined by the mixing unit remote controller 8 or the hot water supply. It is also possible to display the information on the remote controller 34 for use.

(4) In the first and second embodiments, the adjusting operation of the mixing valve 5 is feedback-controlled so that the temperature detected by the hot water supply temperature thermistor 32 becomes the required temperature of hot and cold water. A high-temperature water temperature thermistor for detecting the temperature of the supplied high-temperature water and a low-temperature water thermistor for detecting the temperature of the low-temperature water supplied to the mixing valve 5 are provided, and mixing is performed based on the detection information of the high-temperature water temperature thermistor and the low-temperature water thermistor. The adjusting operation of the mixing valve 5 may be feedforward controlled so that the temperature of the hot and cold water mixed by the valve 5 becomes the hot water supply temperature. Alternatively, as described above, based on the detection information of the high-temperature water temperature thermistor and the low-temperature water thermistor, the feed-forward control of the adjusting operation of the mixing valve 5 is performed so that the temperature of the hot water mixed by the mixing valve 5 becomes the hot water supply temperature. With hot water supply thermistor 3
The adjustment operation of the mixing valve 5 may be feedback-controlled so that the detected temperature of 2 becomes the required temperature of hot and cold water.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply facility according to a first embodiment.

FIG. 2 is a schematic configuration diagram of a fluid heating unit according to the first embodiment.

FIG. 3 is a schematic configuration diagram of a hot water supply unit in a second embodiment.

FIG. 4 is a schematic configuration diagram of a hot water supply facility in a third embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fluid heating unit 2 mixing unit 3 low-temperature water supply path 4 hot water supply path 5 mixing section 6 temperature control section 7 high-temperature water supply path 9 switching means 14 heating section 15 heating control section 31 temperature detection means K mixing means KY hot water supply unit T Heating means

Continued on the front page (72) Inventor Akihiko Yasuda 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Hermani Co., Ltd. (72) Inventor Makoto Sano 1-1-52 Oka, Minami-shi, Minato-ku, Osaka, Osaka Co., Ltd. Inside Herman (72) Inventor Daisuke Konishi 1-15-1 Oka, Minami-shi, Minato-ku, Osaka City, Osaka Prefecture Inside Herman Co., Ltd. (72) Kenji Kenji 1-1-52 Oka, Minami-shi, Minato-ku, Osaka, Osaka Co., Ltd. In Herman (72) Inventor Miki Okada 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka F-term in Harman Co., Ltd. (Reference) 3L070 BC02 BC14 DF06 DG07 3L073 AA18 AC01 AD05 AE06

Claims (6)

[Claims] 1. A heat-exchange type heating section for heating low-temperature water supplied through a high-temperature water supply path or hot water supplied through a high-temperature water supply path, and the temperature of the hot water or the low-temperature water being higher than a required hot water temperature. Heating means having a heating control unit for controlling the heating operation of the heating unit so as to heat to a heating temperature, and mixing the high-temperature water and the low-temperature water heated by the heating unit, or A mixing unit that mixes the hot water, the high-temperature water, and the low-temperature water and supplies hot water to a hot water supply path; and an adjusting operation of the mixing unit such that the hot and cold water mixed in the mixing unit has the required hot-water temperature. Water supply equipment provided with mixing means having a temperature control unit for controlling the temperature. 2. The heating device according to claim 1, wherein the heating unit sets a temperature higher than the required hot water temperature by a set temperature as the heating temperature and heats the hot water.
Hot water supply equipment described in. 3. The heating means is configured to heat the hot water by setting a constant high temperature as the heating temperature irrespective of the required hot and cold water temperature.
Hot water supply equipment described in. 4. A temperature detecting means for detecting a temperature of the hot water supplied to the mixing means through the high-temperature water supply path, and heating the hot water or the low-temperature water by the heating part to the mixing part. Switching means for switching between a heating supply state for supplying the hot water and a non-heating supply state for supplying the hot water to the mixing unit without heating the heating unit, wherein the temperature control unit detects detection information of the temperature detection unit. When the detected temperature is lower than the required hot water temperature, the switching means is switched to the heating supply state to adjust and operate the mixing unit, and when the detected temperature is equal to or higher than the required hot water temperature, The hot water supply equipment according to any one of claims 1 to 3, wherein the switching unit is switched to a non-heating supply state to adjust and operate the mixing unit. 5. The hot water supply equipment according to claim 1, wherein a fluid heating unit provided with said heating means and a mixing unit provided with said mixing means are formed separately. 6. The hot water supply apparatus according to claim 1, wherein said heating means and said mixing means are integrally formed as a hot water supply unit.