JP2001165458A - Hot water supply equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment to supply hot water, having a hot water demand temperature, as much as possible. SOLUTION: Hot water supply equipment is constituted such that when, based on detecting information of a temperature detecting means 31 to detect the temperature of hot water, its detecting temperature exceeds a hot water demand temperature, a switching means 9 is switched to a non-heating hot water supply state that hot water is supplied through a hot water supply passage 4 without supplying hot water to a heating part 14 to heat and, when a detecting temperature is below a hot water demand temperature, the switching means 9 is switched to a heating hot water supply state. A control means H for supplying hot water is provided to control switching operation of the switching means 9. The control means H for supplying hot water supplies hot water to the heating part 14 when, based on detecting information of the temperature detecting means 31, a detecting temperature is higher by a set temperature for permission than a hot water demand temperature, and causes a hot water supply means K to perform operation to supply hot water such that hot water is supplied through the hot water supply passage 4 without heating water supplied to a heating part 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and hot water supply state in which hot water supplied through a high-temperature water supply path is supplied to a heating section and heated to supply hot water through a hot water supply path, and the hot water is not supplied to the heating section. Switching means capable of switching to a non-heated hot water supply state in which hot water is supplied through the hot water supply path without heating the hot water, a heat exchange type heating section for heating the hot water, and heating the hot water to a set temperature for heating. Heating means provided with a heating control unit for controlling the heating operation of the heating unit, temperature detection means for detecting the temperature of the hot water supplied through the high-temperature water supply path, and detection information of the temperature detection means When the detected temperature is equal to or higher than the required hot and cold water temperature, the switching means is switched to the non-heated hot water supply state, and when the detected temperature is lower than the required hot and cold water temperature, About hot water supply facilities and hot water supply control means for controlling the switching operation of said switching means to switch the switch means to the heating hot water supply condition is provided.

[0002]

2. Description of the Related Art In a hot water supply system as described above, a mixing device for mixing hot water supplied through a high-temperature water supply channel and tap water supplied through a low-temperature water supply channel, a heating device for heating the hot water, A temperature detecting means for detecting a temperature of the hot water supplied through the high-temperature water supply passage; a state in which the mixing device feeds the mixed hot water mixed into the hot water supply passage; and a state in which the mixed hot water mixed is supplied to the heating device. And when the temperature detected by the temperature detecting means is lower than the required temperature of hot and cold water, it is switched to a state in which mixed hot water mixed with the mixing device is supplied to the heating device, and
When the temperature detected by the temperature detecting means is equal to or higher than the required hot water temperature, a device is known which switches to a state in which mixed hot water mixed with a mixing device is supplied to a hot water supply path (for example, Japanese Unexamined Patent Publication No.
No. 9-119122).

In addition, the hot water supply system described in the above publication stores hot water heated using solar heat in a hot water storage type boiler, and supplies the hot water from the hot water type boiler to a mixing device through a high temperature water supply path. When the temperature detected by the temperature detecting means is lower than the required hot water temperature, the mixing device is switched to a state in which the mixed hot water is supplied to the heating device, and the heating device heats the hot water to the required hot water temperature. As described above, the mixing device is switched to the heating and hot water supply state in which the mixing device is adjusted and operated, and when the temperature detected by the temperature detecting means is equal to or higher than the required hot water temperature, the mixed device is switched to the state in which mixed hot water mixed with the mixing device is supplied to the hot water supply path, The mixing device is adjusted so that the mixed hot water reaches the required hot water temperature, and is switched to a non-heating hot water supply state in which hot water is supplied. Depending on the season or weather, only a part of the hot water in the hot water storage boiler is heated, or the hot water that has been sufficiently heated and stored in the hot water storage boiler is supplied through the high temperature water supply channel. When the temperature of the heated hot water drops from the required hot water temperature to a required hot water temperature, the non-heated hot water supply state is switched to a hot water supply state, and the hot water stored in the hot water storage type boiler is effectively utilized while using the hot water. Hot water at the required temperature is supplied.

[0004]

However, in the conventional hot water supply equipment, when the temperature of the hot water supplied through the high-temperature water supply passage falls from the required hot water temperature to less than the required hot water temperature, the hot water supply state changes from the non-heated hot water supply state to the heated hot water supply state. However, in the early stage, the hot water stored in the heating device is supplied, and there is a possibility that the hot water at the required 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]

To achieve this object, according to the first aspect of the present invention, hot water supplied through a high-temperature water supply passage is supplied to a heating section, heated and heated through a hot water supply passage. Switching means for switching between a hot water supply state for supplying hot water, a non-heating hot water supply state for supplying hot water through the hot water supply path without heating the hot water without supplying the hot water to the heating section, and a heat exchange type for heating the hot water The heating unit, and a heating unit including a heating control unit that controls a heating operation of the heating unit so as to heat the hot water to a set temperature for heating, and the hot water supplied through the high-temperature water supply path. Temperature detection means for detecting the temperature of the temperature, based on the detection information of the temperature detection means, when the detected temperature is equal to or higher than the required hot and cold water temperature, switching the switching means to the non-heating hot water supply state, and, A hot water supply system provided with hot water supply control means for controlling a switching operation of the switching means so as to switch the switching means to the hot water supply state when the outlet temperature is lower than the hot water demand temperature; Hot water supply means for supplying the hot water supplied through the high-temperature water supply path to the heating section and performing hot water supply operation to supply hot water through the hot water supply path without heating the hot water supplied to the heating section, The hot water supply control means, based on the detection information of the temperature detection means, causes the hot water supply means to perform the hot water supply operation when the detected temperature is higher than the hot water required temperature by an allowable set temperature. Is configured.

That is, for example, when hot water heated by utilizing solar heat or exhaust heat of combustion exhaust gas is stored in a hot water storage tank or the like and hot water is supplied from the hot water storage tank through a high-temperature water supply path, When the temperature of the hot water supplied through the high-temperature water supply passage falls from the required hot water temperature to less than the required hot water temperature, the hot water supply state is switched to the non-heated hot water supply state. Then, for example, before the stored hot water is supplied, the temperature of the hot water falls from the required hot water temperature to less than the required hot water temperature and the non-heated hot water supply state is switched to the heated hot water supply state; When the temperature is higher than the required hot water temperature by the allowable set temperature, the hot water supplied through the high-temperature water supply path is supplied to the heating unit, and the hot water supplied to the heating unit is heated. The hot water supply operation is performed so that hot water is supplied through the hot water supply path without the hot water.

[0008] Therefore, when the temperature of the hot water is higher than the required temperature of hot water by the allowable set temperature, the hot water higher than the required temperature of hot water is supplied to the heating section, so that the hot water supply state is changed from the non-heated state to the heated hot water supply state. Before being switched to hot water, the cooled hot water stored in the heating section is supplied from the low-temperature water supply path so that the mixed hot water becomes the hot water required temperature together with hot water higher than the hot water required temperature. And hot water can be supplied, and even at the initial stage of switching from the non-heated hot water supply state to the heated hot water supply state, hot water can be supplied at the required hot water temperature.

According to the second aspect of the present invention, the heating control unit is configured to heat the heating unit when the hot water is supplied to the heating unit in an amount equal to or greater than the ignition water flow. The hot water supply means is configured to perform the hot water supply operation to supply the hot water having a volume less than the ignition water flow rate to the heating unit, out of the hot water supplied through the high temperature water supply path. In other words, a water heater that can be adapted as a heating means is usually provided with a function of heating the heating unit when hot water equal to or more than the ignition water flow is supplied to the heating unit. The hot water supply operation can be performed only by adjusting the amount of hot water to be supplied to the heating unit by using a function provided in the water heater in advance. Therefore, compared to the device that performs the hot water supply operation by suppressing the heating operation of the heating unit, the hot water supply operation can be performed without adding special control such as stopping the heating operation of the heating unit, Hot water can be supplied at the required water temperature while facilitating the control operation.

According to the third aspect of the present invention, the heating means is configured to set a temperature higher than the required hot water temperature as the set temperature for heating, and to heat the hot water. A mixture of heated high-temperature water supplied by being heated in the section and unheated high-temperature water supplied without being heated by the heating section and low-temperature water supplied through the low-temperature water supply path is supplied to the hot water supply path. Mixing means for supplying hot water is provided, and the control means for hot water supply controls the switching operation of the switching means and the hot water supply operation of the hot water supply means based on the detection information of the temperature detection means, and The adjusting operation of the mixing means is controlled such that the hot and cold water mixed by the means has the required hot and cold water temperature.

That is, for example, in a hot water supply state,
When the hot water supplied to the heating unit is heated by adjusting the heating amount of the heating unit so as to reach the required temperature, the heated hot water heated by the heating unit is supplied as it is. And even if the amount of heating is changed, the temperature of the hot water supplied immediately does not change, causing a control delay,
It is difficult to adjust the amount of heating to bring the heated hot water to the hot water required temperature, and there is a possibility that hot water at the hot water required temperature cannot be supplied. However, in the heating hot water supply state, the tap water supplied through the low-temperature hot water supply passage so that the mixed hot water is heated to the heating set temperature higher than the hot water required temperature in the heating unit, and the mixed hot water is brought to the hot water required temperature. Hot water is mixed with low-temperature water, etc., so that it is possible to supply hot water at the hot water demand temperature by adjusting and operating the mixing means, regardless of the change in the amount of heating, and supply hot water at the hot water demand temperature. It becomes possible.

According to the fourth aspect of the present invention, the heating means heats the hot water by setting a temperature higher than the hot / cold required temperature by the set temperature for the heating section as the set temperature for heating. Is configured. 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. In addition, if the heating temperature is set to a constant high temperature regardless of the required water temperature, if the required water temperature is set to a low temperature, the temperature difference between the required water temperature and the heating temperature is set. Becomes large, and the hot water supplied through the hot water supply path is heated to a high temperature having a large temperature difference from the hot water demand temperature, and the hot water is wastefully heated. By keeping the temperature difference from the service temperature constant and heating the hot water to a high temperature at which the temperature difference from the hot / cold required temperature is constant, it is possible to prevent the hot water from being wasted.

According to the invention described in claim 5, the heating means is configured to heat the hot water by setting a constant temperature as the heating temperature irrespective of the required hot and cold water temperature. ing. That is, as in claim 4,
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 sixth 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 7, 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.

[0016]

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 includes a heat exchange type heating unit 14 for heating hot water supplied through a hot water supply side high-temperature water supply passage 7a, The heating control unit 15 controls the heating operation of the heating unit 14 so as to heat to a high heating set temperature. The heating control unit 15 includes a hot water supply unit T as a heating unit. Water heater remote control R to command
Is also provided. The hot water supply unit T is configured to heat the hot water by setting a constant high temperature higher than the hot water demand temperature as the heating set temperature, regardless of the hot water demand temperature, and heating the hot water. The heating unit 14 is configured to be heated when hot water equal to or greater than the amount of ignition water is supplied to the water heater 1 to the heating unit 14.

The mixing unit 2 is provided with a heated high-temperature water supplied by being heated by the water heater 1 and a non-heated high-temperature water and a low-temperature water supply passage 3 supplied without being heated by the water heater 1.
Valve 5 as mixing means for mixing the low-temperature water supplied through the hot water supply path and supplying hot water to the hot water supply path 4, and supplying the hot water supplied through the high-temperature water supply path 7 to the water heater 1 and heating the water to supply the hot water to the mixing valve 5. Switching means 9 that can be switched between a heated hot water supply state in which the hot water is supplied to the hot water supply apparatus and a non-heated hot water supply state in which the hot water is supplied to the mixing valve 5 without being heated without being supplied to the water heater 1 and supplied with hot water. Hot water supply control means H for controlling the adjusting operation of the mixing valve 5 and controlling the switching operation of the switching means 9 so that the mixed hot and cold water mixed by the valve 5 becomes the required hot water temperature.
And a remote control 8 for the mixing unit for instructing control information such as the required hot water temperature to the hot water supply control means H, which can freely change the required hot 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.

A high-temperature water supply path 7 includes a water heater-side high-temperature water supply path 7a for supplying the hot water to the water heater 1 and a mixing valve-side high-temperature water supply path for supplying the hot water to the mixing valve 5. 7b and is connected to the hot water supply side high-temperature water supply passage 7a. The hot water supply side proportional valve 9a and the hot water supply to the water heater 1 are adjustable in the degree of opening of the water supply side high-temperature water supply passage 7a. A water heater flow rate sensor 6 for detecting the flow rate is provided, and a mixing valve side opening / closing valve 9b is provided in the mixing valve side high temperature water supply path 7b so as to open and close the mixing valve side high temperature water supply path 7b.

That is, the water heater-side proportional valve 9a and the mixing valve-side on-off valve 9b act as the switching means 9 to bring the water heater-side proportional valve 9a into a fully open state and the mixing valve-side on-off valve 9b into a closed state. The hot water is heated by the heating unit 14 and the mixing valve 5 is heated.
And a non-heated hot water supply state in which the hot water supply side proportional valve 9a is fully closed and the mixing valve side opening / closing valve 9b is open to supply the hot water to the mixing valve 5 without heating. It is configured to be freely switchable.

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 water temperature based on the detection information of the supply hot water temperature thermistor 31, the hot water supply control means H fully opens the water heater side proportional valve 9a and opens the mixing valve side opening / closing valve. When the detected temperature is equal to or higher than the required water temperature, the water heater side proportional valve 9a is fully closed, and the mixing valve side is opened and closed. The valve 9b is opened to switch to the non-heating supply state, and the mixing valve 5 is adjusted to operate. When the detected temperature is higher than the hot and cold water required temperature by the allowable set temperature, the high temperature water supply path 7 is used. The supplied hot water is supplied to the water heater 1 and the hot water supplied to the heating unit 14 is heated without heating the hot water supply path 4.
It is configured to control the hot water supply operation so that hot water is supplied through the hot water. More specifically, 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.
The hot water heated by the water heater 1 is supplied to the mixing valve 5 to be mixed with the water, and the mixing valve 5 is feedback-controlled so that the temperature detected by the hot water temperature thermistor 32 becomes the required temperature. Then, hot water at the hot water demand 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. Mixing valve 5 so that the required hot and cold water temperature is reached
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 becomes higher than the required hot water temperature by an allowable set temperature during hot water supply or the like, when the mixing valve side opening / closing valve 9b is opened, the hot water supply is stopped. Based on the detection information of the water amount sensor 6, the opening degree of the water heater-side proportional valve 9a is adjusted so that hot water less than the ignition water amount is supplied to the water heater 1, and the detected temperature of the hot water temperature thermistor 32 becomes the required hot water temperature. The mixing valve 5 is feedback-controlled so as to supply hot water at a required hot water temperature through the hot water supply path 4. That is, the mixing valve side opening / closing valve 9b and the water heater side proportional valve 9a
It is configured to act as hot water supply means K.

In addition, when the temperature of the hot water drops to a temperature higher than the required hot water temperature by the allowable set temperature before the required hot water temperature becomes lower than the required hot water temperature, the mixing valve side opening / closing valve 9b is opened. In the above, based on the detection information of the water heater flow rate sensor 6, the opening of the water heater side proportional valve 9a is adjusted so as to supply the hot water to the water heater 1 with less than the ignition water amount, and the hot water is supplied to the water heater 1. The hot water is supplied to the mixing valve 5 together with the cooled hot water stored in the water heater 1 without being heated by the heating unit 14. Then, the hot water supplied from the mixing valve side high temperature water supply path 7b and the water heater 1 and the low temperature water supplied through the low temperature water supply path 3 are mixed so that the detected temperature of the hot water supply temperature thermistor 32 becomes the required water temperature. The valve 5 is feedback-controlled to supply hot water at a required hot water temperature through the hot water supply path 4.

In this manner, when the temperature of the hot water drops to a temperature higher than the required temperature of the hot water before the temperature becomes lower than the required temperature of the hot water by the allowable set temperature, the hot water supplied through the high-temperature water supply passage 7 is supplied to the hot water. By supplying to the vessel 1,
The hot water stored in the water heater 1 can be supplied in advance. Therefore, even if the hot water supply is further continued and the temperature of the hot water supplied through the high-temperature water supply path 7 falls below the required hot water temperature, and the mode is switched to the hot water supply state, the hot water stored in the water heater 1 is cooled. Hot water is supplied in advance, so that hot water at the required hot water temperature can be supplied even in the initial period of switching from the non-heated hot water supply state to the heated hot water supply state.

The water heater 1 comprises a heat exchanger 17 for water heating provided in a combustion chamber 16, a gas combustion type burner 18 for heating the heat exchanger 17, and the like. 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.

An electromagnetically operated intermittent valve 26 for intermitting fuel supply is provided in the fuel supply passage 25 for the burner 18, and an electromagnetically operated gas amount adjusting valve capable of changing and adjusting the 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 water flow detected by the water flow sensor 22 exceeds the ignition water flow, the fan 1
9 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 controls the burner 18.
And fired by the frame rod 29. 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 executed so that the detected temperature becomes the set temperature for 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 is supplied by being heated by the heating section 14. Unheated high-temperature water and low-temperature water supply path 3 supplied without being heated by heating high-temperature water and heating unit 14
A mixing valve 5 is provided as mixing means for mixing the low-temperature water supplied through the hot water and supplying the 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. A hot water supply control unit 33 is provided as hot water supply control means H for controlling the adjusting operation of the hot water supply unit 5. The hot water supply unit is capable of freely changing the required hot water temperature and instructing the hot water supply control unit 33 with control information such as the required hot water temperature. Remote control 34 is also provided.

The high-temperature water supply path 7 is connected to a bypass high-temperature water supply path 35 bypassing the heat exchanger 17.
5 is provided with a bypass opening / closing valve 36 capable of opening / closing.
The high-temperature water supply path 7 includes a bypass high-temperature water supply path 3.
A high-temperature water proportional valve 37 that can adjust the degree of opening of the high-temperature water supply passage 7 and a heat exchanger that detects the amount of water flowing to the heat exchanger 17 are provided between the upstream connection point of the heat exchanger 5 and the heat exchanger 17. A water amount sensor 38 is provided.

The hot water supply control unit 33 heats the heat exchanger 17 to a constant high temperature higher than the required hot water temperature regardless of the required hot water temperature, in a state in which the hot water is supplied to the heat exchanger 17 at an ignition water flow rate or more. The temperature is set as a service temperature, and the heating operation of the heating unit 14 is controlled to heat the hot water.

When the detected temperature is equal to or higher than the required hot water temperature, the hot water supply control section 33 fully closes the high temperature water proportional valve 37 and opens the bypass on-off valve 36 based on the detected temperature of the supplied hot water temperature thermistor 31. And warm water 1
When the detected temperature is lower than the required hot water temperature, the high-temperature water proportional valve 37 is fully opened and the bypass on-off valve 36 is turned off. In the closed state, the hot water is supplied to the heating unit 14 to be heated and switched to the hot water supply state in which the hot water is supplied through the hot water supply path 4, and when the detected temperature decreases to a temperature higher than the required hot water temperature by an allowable set temperature, The bypass opening / closing valve 36 is opened, and the hot water supply operation is performed by adjusting the opening of the high temperature water proportional valve 37 so that the flow rate detected by the heat exchanger flow rate sensor 39 becomes less than the ignition flow rate. ing. That is, the high-temperature water proportional valve 37 and the bypass on-off valve 36 are configured to function as the switching means 9 and the hot water supply means K.

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 high-temperature water proportional valve 37 is fully closed and the bypass on-off valve 36 is opened, so that hot water is supplied to the mixing valve 5 without being supplied to the heating unit 14, and the detected temperature of the hot water supply temperature thermistor 32 becomes the required hot water temperature. As described above, the mixing valve 5 is feedback-controlled to supply hot water at the required hot water temperature through the hot water supply path 4. When the temperature detected by the supply hot water temperature thermistor 31 is lower than the required hot or cold water temperature, the high-temperature water proportional valve 37 is fully opened and the bypass on-off valve 36 is closed, and the hot water is supplied to the heating unit 14 for heating. Heated hot water is supplied to the mixing valve 5, and the mixing valve 5 is feedback-controlled so that the detected temperature of the hot water supply temperature thermistor 32 becomes the hot water required temperature, so that hot water at the hot water required temperature is supplied through the hot water supply path 4.

When the temperature of the hot water drops to a temperature higher than the required temperature of the hot water before the required temperature of the hot water by the allowable set temperature, the bypass opening / closing valve 36 is opened, and the flow rate of the heat exchanger is reduced. The opening of the high-temperature water proportional valve 37 is adjusted so that the water flow detected by the sensor 39 is less than the ignition water flow, and the hot water supplied through the high-temperature water supply path 7 is supplied to the mixing valve 5 without heating. The mixing valve 5 is feedback-controlled so that the temperature detected by the 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.

In the heating hot water supply state, the heating unit 1
In order to adjust the amount of combustion of the burner 18 so that the temperature of the heated hot water heated at 4 becomes the set temperature for heating, based on the detection information of the supply hot water temperature thermistor 31 and the heat exchanger flow rate sensor 38, the intermittent operation is performed. The opening degree of the valve 26 and the gas amount control valve 27 and the operation of the fan 19 are controlled in a feedforward manner. 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, the gas amount control valve 2
Feedback control for finely adjusting the opening of the control unit 7 may be executed.

[Another Embodiment] (1) In the first and second embodiments, the high-temperature water supply path 7
The hot water supplied through the hot water is heated to a constant high temperature regardless of the required hot water temperature, but the hot water supplied through the high temperature water supply path 7 is heated to a temperature higher than the required hot water temperature by a set temperature. You may make it heat.
In this case, the remote controller 8 for the mixing unit and the remote controller R of the water heater 1 are configured to be able to communicate freely, and the heating temperature is set to a temperature higher than the required hot and cold water temperature by the set temperature.

(2) In the first and second embodiments, the mixing valve 5 mixes high-temperature water supplied by being heated by the heating unit 14 with low-temperature water supplied through the low-temperature water supply path 3. Although the hot water supply path 4 is configured to supply hot water, the mixing valve mixes hot water supplied through the high-temperature water supply path 7 and low-temperature water supplied through the low-temperature water supply path 3 and supplies the mixed water to the heating unit 14. Alternatively, the hot water heated by the heating unit 14 may be supplied to the hot water supply path 4.

Then, as described above, the mixing valve mixes the hot water supplied through the high-temperature water supply path 7 and the low-temperature water supplied through the low-temperature water supply path 3 and supplies the mixed water to the heating unit 14. In the hot water supply facility configured to supply the heated hot water heated by the hot water to the hot water supply path 4, the case where the water heater 1 and the mixing unit 2 are separately formed as in the first embodiment, and the second embodiment. As shown in FIG. 1, the heating means and the mixing means may be integrally formed as a hot water supply unit KY. However, as in the first embodiment, the case where the water heater 1 and the mixing unit 2 are separately formed is shown in FIG. Will be described in place of the configuration shown in FIG. In addition, about the structure similar to the said 1st Embodiment, the same code | symbol is described and the detailed description is abbreviate | omitted.

The water heater remote control R and the mixing unit remote controller 8 are configured to be able to communicate with each other. It is configured to set and heat the supplied mixed hot water. And the mixing unit 2
As shown in FIG. 4, the mixing valve 5 mixes high-temperature water supplied through the high-temperature water supply path 7 with low-temperature water supplied through the low-temperature water supply path 3 and supplies the mixed water to the mixed hot-water supply path 39.
a is provided. And the mixed hot water supply path 39 is
The mixed hot water mixed by the mixing valve 5 is supplied to the hot water supply path 4 as it is, and the mixed hot water supplied by the mixing valve 5a is supplied to the hot water heater 1 and then the hot water is supplied to the hot water supply path 4 by the mixed hot water supplied by the mixing valve 5a. The heating mixed hot water supply passage 39b to be heated is branched and connected. The mixed hot water supply path 39b for heating is provided with a mixed hot water proportional valve 40 capable of adjusting the degree of opening of the mixed hot water supply path 39b for heating and a water heater flow rate sensor 6 for detecting the flow rate of water to the water heater 1. The hot water supply hot water supply path 39a is provided with a hot water supply opening / closing valve 41 for opening and closing the hot water supply hot water supply path 39a.

The hot water supply control means H opens the mixed hot water proportional valve 40 and activates the hot water supply opening / closing valve 41 based on the detection information of the supply hot water temperature thermistor 31 when the detected temperature is lower than the required hot water temperature. The valve is closed, the mixed hot water mixed by the mixing valve 5a is supplied to the water heater 1 and is switched to a heating and hot water supply state in which the mixed hot water is heated to the required hot water temperature and supplied with hot water, and the detected temperature is higher than the required hot water temperature. When
When the mixed hot water proportional valve 40 is fully closed and the hot water supply opening / closing valve 41 is opened, the mixed hot water mixed by the mixing valve 5a is supplied to the hot water heater 1 without being heated without being supplied to the water heater 1. In addition to switching to the state, when the temperature detected by the supply hot water temperature thermistor 31 is a temperature higher than the required hot water temperature by the allowable set temperature, the detection of the water heater flow rate sensor 6 is performed with the hot water supply opening / closing valve 41 opened. The mixed hot water proportional valve 40 is controlled so that the amount of water flow is less than the amount of ignition water of the water heater 1.
It is configured to operate the hot water supply operation by adjusting the opening degree. That is, the mixed hot water proportional valve 40 and the hot water supply on-off valve 41
Are configured to function as the switching means 9 and the hot water supply means K.

(3) In the first and second embodiments, when the heating water is supplied to the heating unit 14 at a rate equal to or greater than the ignition water flow, the heating unit 14 is configured to be heated. Although the hot water supply operation is performed by adjusting the flow rate of water to less than the ignition flow rate, the heating operation of the heating unit 14 may be suppressed to perform the hot water supply operation.

In addition, in the first embodiment, when the temperature detected by the supply hot water temperature thermistor 31 is higher than the required hot water temperature by the allowable set temperature, the water heater-side proportional valve 9a and the mixing valve The side opening / closing valve 9b is opened, and the hot water supply operation is performed by checking the heating operation of the heating unit 14 so as not to start. Further, in the second embodiment, when the temperature detected by the supply hot water temperature thermistor 31 is higher than the required hot water temperature by the allowable set temperature, the high temperature water proportional valve 37 and the bypass on-off valve 36 are opened. At the same time, the hot water supply operation is performed with a check so as not to start the heating operation of the heating unit 14.

(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 another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid heating unit 2 Mixing unit 3 Low-temperature water supply path 4 Hot water supply path 5 Mixing means 7 High-temperature water supply path 9 Switching means 14 Heating unit 15 Heating control unit 31 Temperature detecting means H Hot water supply control means K Hot water supply means KY hot water supply unit T heating means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiko Yasuda 1-1-52, Minami-shi, Minato-ku, Osaka-shi, Osaka Prefecture Herman Co., Ltd. (72) Inventor Makoto Sano 1-1-52, Oka, Minami-shi, Minato-ku, Osaka, Osaka No. Harman Co., Ltd. (72) Inventor Daisuke Konishi 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Prefecture (72) Inventor Kenji Kenji 1-1-52 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka No. Harman Co., Ltd. (72) Inventor Miki Okada 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Prefecture F-term (reference) 3L070 BB03 BB16 DD08 DE09 DF06 DG06 DG07 3L073 AA02 AA06 AA15 AA18 AB01 AB09 AC01 AD05 AD06 AE06

Claims (7)

[Claims] 1. A heating and hot water supply state in which hot water supplied through a high-temperature water supply path is supplied to a heating section and heated to supply hot water through a hot water supply path, and the hot water is supplied to the heating section without being heated without being supplied to the heating section. Switching means capable of switching to a non-heating hot water supply state in which hot water is supplied through a hot water supply path; a heat exchange type heating section for heating the hot water; and heating of the heating section so as to heat the hot water to a set temperature for heating. A heating unit having a heating control unit for controlling operation, a temperature detection unit for detecting a temperature of the hot water supplied through the high-temperature water supply path, and a detection based on detection information of the temperature detection unit. When the temperature is equal to or higher than the required hot and cold water temperature, the switching means is switched to the non-heated hot water supply state, and when the detected temperature is lower than the required hot and cold water temperature, the switching means is switched to the heating and hot water supply state. Hot water supply control means for controlling a switching operation of the switching means so as to switch to a hot water state, wherein the hot water supplied through the high-temperature water supply path is supplied to the heating unit; A hot water supply unit is provided that performs hot water supply operation so as to supply hot water through the hot water supply path without heating the hot water supplied to the heating unit.The hot water supply control unit is based on detection information of the temperature detection unit. Hot water supply equipment configured to cause the hot water supply means to perform the hot water supply operation when the detected temperature is higher than the required hot water temperature by an allowable set temperature. 2. The heating control section is configured to perform heating operation of the heating section when the hot water is supplied to the heating section at an ignition water flow rate or more, and the hot water supply means includes: The hot water supply equipment according to claim 1, wherein the hot water supply operation is performed such that hot water less than the ignition water flow rate among the hot water supplied through the high temperature water supply path is supplied to the heating unit. 3. The heating means is configured to heat the hot water by setting a temperature higher than the hot / cold required temperature as the set temperature for heating, and supplied by being heated by the heating unit. Mixing means for mixing heated high-temperature water and unheated high-temperature water supplied without being heated by the heating section with low-temperature water supplied through the low-temperature water supply path to supply hot water to the hot water supply path; Hot water supply control means controls the switching operation of the switching means and the permission operation of the permission means based on the detection information of the temperature detection means, and the hot water mixed by the mixing means is supplied to the hot water demand. 2. The apparatus according to claim 1, wherein the control unit controls the adjusting operation of the mixing unit so that the temperature of the mixing unit is adjusted.
Or the hot water supply equipment according to 2. 4. The apparatus according to claim 3, wherein said heating means is configured to set a temperature higher than said hot / cold required temperature by a set temperature for a heating section as said set temperature for heating, and to heat said hot water. The hot water facilities described. 5. The heating means is configured to heat the hot water by setting a constant temperature as the heating temperature irrespective of the required hot and cold water temperature.
Hot water supply equipment described in. 6. The hot water supply apparatus according to claim 3, wherein a fluid heating unit including the heating unit and a mixing unit including the mixing unit are separately formed. 7. The hot water supply equipment according to claim 3, wherein the heating means and the mixing means are integrally formed as a hot water supply unit.