JP2002048407A - Hybrid type electric water heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid type electric water heating apparatus capable of corresponding to highly efficient utilization of a solar heat and additional heating and having excellent facility. SOLUTION: Hot water in a tank 11 is heated by upper and lower heaters 12 and 13 of a heating tank 111 at the upper part of the tank 11 and a heat exchanger 14 located at a hot water storage tank 112 at the lower part of the tank 11 and radiating a solar heat in the shot water storage tank 112 and the hot water is stored. In a so formed hybrid type electric water heating apparatus, a heat collector 21 and line 23 through which an antifreezing solution 201 is forcibly circulated, are connected to the heat exchanger 14. Temperature sensors 15, 16, and 17 are situated at intervals at the upper part of the tank 11. A temperature sensor 18 to detect a boiling temperature is situated at the central part of the tank 11. Through energization of the upper and lower heaters 12 and 13 and collection of a solar heat, hot water in the tank 11 is boiled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hybrid electric water heater using solar heat as an auxiliary heat source.

[0002]

2. Description of the Related Art Conventionally, as a hybrid electric water heater utilizing solar heat, a heat medium heated in a solar heat collecting panel is circulated by a pump through a heat exchanger in a hot water storage tank and into the solar heat collecting panel to store hot water. 2. Description of the Related Art A heat exchange type solar water heater that heats water in a tank is known.
As an operation method of the above-mentioned solar water heater, Japanese Patent Application Laid-Open
No. 182941 describes this.

In the above publication, the temperature of the heat medium at the inlet of the heat exchanger and the temperature of the water in the hot water storage tank are detected, and if the temperature difference is equal to or lower than a certain temperature, the pump is stopped. The temperature of the heat medium at the entrance of the heat exchanger and the temperature of the water in the hot water storage tank are detected, and the time corresponding to the temperature difference is stopped.

The temperature of the heat medium at the inlet of the heat exchanger and the temperature of the heat medium at the outlet of the heat exchanger are detected, and the pump is stopped for a time corresponding to the temperature difference. The temperature of the heat medium at the outlet of the solar heat collecting panel is detected, and the pump is operated when the temperature rise rate becomes a certain value or less.

Japanese Patent Application Laid-Open No. Hei 10-197070 describes an electric water heater in which hot water is boiled in a hot water storage tank even if hot water is used during a standby time until the start of energization. In the above publication, a heater for boiling hot water with electric power and a hot water storage tank for storing hot water, a water temperature sensor for detecting the temperature of the water, a temperature sensor for detecting a temperature according to the remaining hot water amount, a temperature of the remaining hot water and a detected remaining hot water amount, , Based on the water temperature and
Calculates the standby time for boiling hot water at the end time of the midnight power time, and supplies the midnight power to the heater after the standby time elapses, and when the water temperature sensor and temperature sensor detect a temperature change during the standby time, the heater And a control device that immediately supplies midnight power to the power supply and stops supplying midnight power when the temperature of the boiling sensor reaches a predetermined boiling temperature.

[0006]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 11-1 is disclosed.
As disclosed in Japanese Patent No. 82941, in the circulation operation from the solar heat collector to the heat exchanger, the circulation is controlled by the temperature difference between the heat exchanger and the tank water temperature of the hybrid electric water heater. Therefore, the temperature of the medium at the outlet of the heat collector is not an operating condition, and solar heat utilization with good heat efficiency has not been achieved.

In Japanese Patent Application Laid-Open No. Hei 10-197070, the heater energization start time can be set in consideration of the amount of remaining hot water, and the shortage of hot water can be solved. There was a problem that shortage of hot water in emergency could not be resolved.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an easy-to-use hybrid electric water heater capable of coping with efficient use of solar heat and increased boiling. Is what you do.

[0009]

According to a first aspect of the present invention, there is provided a hybrid electric water heater comprising heaters provided above and below a heating tank at an upper portion of a tank, and a hot water tank provided at a lower portion of the tank. A hot water in a tank is heated and stored by a heat exchanger that dissipates heat, and the heat exchanger is a heat collector that collects solar heat and an antifreeze is forcibly circulated. A temperature sensor is provided at an interval above the tank, and a temperature sensor is provided at the center of the tank to detect the boiling temperature.The tank is turned on and off by energizing upper and lower heaters and collecting solar heat. The water inside is boiling up.

In the hybrid electric water heater according to the present invention, when the temperature is lower than a temperature set by a temperature sensor, the upper heater heats the upper portion of the heating tank, and the lower heater heats the lower portion of the heating tank. When the temperature sensor becomes lower than the set temperature during the heating and the lower heater, the power supply to the lower heater is stopped, and the upper heater is turned on.

According to a third aspect of the present invention, in the hybrid electric water heater, the temperature sensor for detecting the amount of the remaining hot water is provided at a position of 50 liters, 100 liters, and 150 liters from the top of the heating tank. .

According to a fourth aspect of the present invention, there is provided the hybrid electric water heater according to the present invention,
Boiling is increased according to an arbitrary hot water load.

According to a fifth aspect of the present invention, in the hybrid electric water heater according to the present invention, the boiling start time is set based on the amount of hot water in the tank, the water temperature, the heater capacity, and the boiling temperature.

According to a sixth aspect of the present invention, there is provided the hybrid electric water heater, wherein the hot and cold water in the tank is 150 to 300 kp.
a.

According to a seventh aspect of the present invention, in the hybrid electric water heater of the present invention, the forced circulation of the antifreeze detects a temperature of the antifreeze near the heat collector and a temperature of the antifreeze near the heat exchanger. It is controlled by the temperature difference from the temperature sensor.

According to an eighth aspect of the present invention, the energization of the upper and lower heaters is stopped by detecting the pressure of hot and cold water in the tank.

[0017]

According to a first aspect of the present invention, in the hybrid electric water heater according to the first aspect of the present invention, the heat exchanger includes a heat collector that collects solar heat;
The antifreeze is connected by a forced circulation line, a temperature sensor is provided at an interval above the tank, and a temperature sensor for detecting a boiling temperature is provided at the center of the tank,
The hot and cold water in the tank is heated by energizing the upper and lower heaters and collecting heat from the solar heat, enabling economical operation using solar heat as an auxiliary heat source. A hybrid electric water heater capable of heating and storing an appropriate amount of hot water.

In the hybrid electric water heater according to the present invention, when the temperature is lower than a set temperature of the temperature sensor, the upper heater heats the upper part of the heating tank, and then the lower heater heats the lower part of the heating tank. When the temperature sensor drops below the set temperature while the water is being boiled by the lower heater, the lower heater is de-energized and the upper heater is energized. Type electric water heater.

In the hybrid electric water heater according to the third aspect of the present invention, the temperature sensor for detecting the amount of remaining hot water is provided at a position of 50 liters, 100 liters, and 150 liters from the top of the heating tank. The energizing time can be set in consideration of the amount of hot water, and a hybrid electric water heater that uses economical midnight power can be provided.

According to a fourth aspect of the present invention, there is provided the hybrid electric water heater of the present invention,
Since the amount of boiling water is increased according to an arbitrary hot water load, it is possible to provide an economical hybrid electric water heater capable of boiling only a necessary amount of heat.

In the hybrid electric water heater according to the present invention, the boiling start time is set by the remaining hot water amount in the tank, the water temperature, the heater capacity, and the boiling temperature. The midnight power supply time can be set according to the amount of hot water, and an economic hybrid electric water heater can be provided.

According to a sixth aspect of the present invention, there is provided the hybrid electric water heater, wherein the hot and cold water in the tank is 200 to 750 kp.
Since it is pressurized to a, an electric water heater that can easily supply hot water to the second and third floors can be provided.

In the hybrid electric water heater according to the present invention, the forced circulation of the antifreeze detects a temperature of the antifreeze near the heat collector and a temperature of the antifreeze near the heat exchanger. Because it is controlled by the temperature difference between the temperature sensor and the temperature sensor, the antifreeze is operated by the accurate temperature difference between the heat collector and the heat exchanger, and the solar heat can be efficiently absorbed.

In the hybrid electric water heater according to the present invention, the power supply to the upper and lower heaters is stopped by detecting the pressure of the hot water in the tank. Prevents empty burning.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a state in which a heat exchanger capable of absorbing solar heat is incorporated in a hybrid electric water heater of the present invention. FIGS. FIG. 5 to FIG. 10 are cross-sectional views showing a state where the solar heat of the auxiliary heat source is collected.

As shown in FIG. 1, in the hybrid electric water heater 10 of the present invention, water supplied from a lower portion of a tank 11 is supplied to upper and lower heaters 12 and 13 provided in a heating tank 111 above the tank 11, Heat is stored in the tank 11 by the heat exchanger 14 provided in the hot water storage layer 112 below the hot water storage layer 11, the hot water is stored, and hot water is discharged from the upper portion of the tank 11.

The heat exchanger 14 is connected to a heat collector 21 for collecting solar heat and a conduit 23 through which the antifreeze 201 is forcibly circulated. Temperature sensors 15, 16, and 17 are provided above the tank 11 for radiating the solar heat of the heat collector 21 to hot and cold water in the tank 11 and detecting a predetermined amount of remaining hot water.

At the center of the tank 11, a temperature sensor 18 for controlling the boiling temperature is provided. A temperature sensor 18 is provided near the pipe of the heat exchanger 21 at the lower part of the tank 11.
Is provided, and the amount of hot water in the tank 11 is detected and heated to a predetermined amount.

The tank 11 forming the box of the hybrid electric water heater 10 is composed of an upper heating tank 111 and a lower hot water storage tank 112. Heating tank 111 of the present embodiment
Has a volume of 380 liters.

An upper heater 12 is provided above the heating tank 111 so as to boil 100 liters of hot water in the heating tank 111.

The hybrid electric water heater 10 of the present invention
When the temperature is lower than the set temperature of the temperature sensors 15, 16 and 17, the upper part of the heating tank 11 is boiled by the upper heater 12, and then the lower part of the heating tank 11 is boiled by the lower heater 13. Temperature sensor 1 while boiling
When 5, 16, and 17 become lower than the set temperature, the lower heater 1
3, the upper heater 12 is energized.

The hot water heated by the upper heater 12 and the lower heater 13 flows out of the hot water outlet 26 at the top of the heating tank 111.

The lower heater 13 is provided below the heating tank 111.
Is provided to boil the lower 280 liters in the heating tank 111.

The heating tank 111 is provided with temperature sensors 15, 16, 17 which can detect the temperature of the hot water at the height of 50, 100, 150 liters above and below the wall surface of the tank 11. For this reason, it has been made possible to perform fine boiling.

A temperature sensor 18 is provided near the center of the tank 11 so that the temperature of the hot and cold water in the tank 11 can be detected.

As described above, the hybrid electric water heater 10 according to the present invention is configured such that the upper heater 12 and the lower heater 13 can increase the boiling according to an arbitrary hot water load.

A hot water storage tank 112 is formed below the heating tank 111 of the tank 11. The hot water storage tank 112 is provided with a heat exchanger 14, a low temperature sensor 19, and a water supply port 25.

The heat exchanger 14 includes a heat collector 21 for collecting solar heat and an antifreeze 20 supplied from a service tank 20.
1 are connected by a line 23 forcibly circulated by a pump 24.

The heat exchanger 14 transmits the solar heat of the heat collector 21 to the heat exchanger 14 by the antifreeze 201 in the pipe 23 and radiates the heat to the hot and cold water in the tank 11.

The low temperature sensor 19 detects the temperature of the antifreeze 201 in the heat exchanger 14. Hot water storage tank 1 of this embodiment
The size of 12 is set to a volume of 200 liters so that heated hot water can be stored.

A water supply port 25 is provided below the hot water storage tank 112. Water is supplied at a constant pressure through a pressure reducing valve in the introduction pipe and is taken in from a water supply port 25 of the hot water storage tank 112.

The pressure of the hot and cold water in the tank 11 is detected by a pressure switch 27 installed in the connection pipe.

A heat collector 21 for collecting solar heat is installed outside, and is connected to a heat exchanger 14 in the hybrid electric water heater 10 through a pipe 23. The antifreeze 201 is forcibly circulated in the pipeline 23.

The antifreeze 201 serving as a heat medium circulating in the pipe 23 is formed of propylene glycol,
Freezing in winter is prevented.

FIGS. 2 to 4 are cross-sectional views showing a state in which the inside of the tank of the hybrid electric water heater according to the present invention has increased boiling. The setting of the heating can be changed depending on the mode of the use load.

FIG. 2 shows a small setting every day. It is set when it is predicted that the amount of hot water will be insufficient in winter or when the number of families is large.

In the hybrid electric water heater 10, when the set temperature of the temperature sensor 15 is lower than 45 ° C., the upper heater 12 is energized, and the upper 100 liters of the heating tank 111 is boiled once a day. I have.

The upper part of the heating tank 111 is at 90 ° C. and the lower part is 4 ° C.
At 0 ° C., the temperature of the hot water storage tank 112 is 15 ° C. Every day, when the remaining hot water drops below 100 liters, it is heated up.

FIGS. 3A and 3B show various settings every day. It is set when it is predicted that the amount of hot water will be insufficient in winter or when the number of families is large.

When the temperature sensor 18 near the lower heater 13 detects 45 ° C. or lower, as shown in FIG. 3A, the upper 100 liters of the tank are first heated to 90 ° C.
As shown in (b), the lower heater 13 is energized and the heating tank 11
The whole is heated to 90 ° C. There is no limit on the number of boiling times.

FIGS. 4A and 4B are set for one day. Temperature sensor 18 near lower heater 13
When the temperature is detected to be 45 ° C. or less, first, as shown in FIG. 4A, the upper 100 liters of the tank 11 is boiled to 90 ° C., and then, as shown in FIG. The whole is heated to 90 ° C.

This is set when there is a visitor and shortage of hot water is predicted. It is made to boil up when the amount of hot water decreases for one day.

FIG. 5 to FIG. 10 are cross-sectional views of the inside of the tank in different states of time when the solar heat of the auxiliary heat source is collected.

FIG. 5 shows the state in the tank 11 at 7:00 am The heating tank 111 is boiled to 90 ° C., and the inside 112 of the hot water storage tank is in a state of water at 15 ° C.

FIG. 6 shows the state at 9 am. This shows a state in which heat collection is started from the heat collector and the inside of the hot water storage tank 112 is heated to 20 ° C.

FIG. 7 shows the state at 2:00 pm. While the heat collection is continued, the hot water in the tank is used, and only that much water is supplied to the lower hot water storage tank 112.

FIG. 8 shows the state at 6:00 pm. This shows a state in which the collection of the solar heat has been completed and the solar heat has been stored in the lower part of the heating tank 111.

FIG. 9 shows the state at 8:00 pm. The hot water in the heating tank 111 is used,
12 is supplied.

FIG. 10 shows the state at 11:00 pm. The hot water in the tank 11 is used, and the amount of the hot water supplied to the upper heater 12 is increased to start boiling.

The hybrid electric water heater 10 of the present invention
Is the boiling start time, the remaining hot water amount in the tank 11,
The water temperature, the heating capacity of the heater, and the boiling temperature can be set more.

For this reason, the power supply start time can be adjusted according to the remaining hot water amount.

The hybrid electric water heater 10 of the present invention
The hot water in the tank 11 is pressurized to 150 to 300 kpa. The tank 11 can be used at high pressure, and hot water is pressurized so that hot water can be supplied to the second and third floors.

The hybrid electric water heater 10 of the present invention
The forced circulation of the antifreeze 201 is controlled by a temperature difference between a temperature sensor 22 for detecting the temperature of the antifreeze 201 near the heat collector 21 and a temperature sensor 19 for detecting the temperature of the antifreeze 201 near the heat exchanger 14. Is what it is.

The antifreeze 201 of the heat collector 21 and the heat exchanger 14
The antifreeze 201 is circulated by an accurate temperature difference depending on the temperature, and efficient heat collection can be performed.

The hybrid electric water heater 10 of the present invention
Sets the pressure of the hot and cold water in the tank 11 to a pressure switch 27.
, The upper and lower heaters 12, 1
3, the energization is stopped.

When the pressure switch 27 detects a drop in hot water pressure,
The energization of the upper heater 12 and the lower heater 13 is stopped so that the tank 11 can be prevented from being empty.

[0067]

According to a first aspect of the present invention, there is provided a hybrid-type electric water heater which radiates solar heat of the heat collector to hot water in a tank and detects a predetermined remaining hot water amount at an upper portion of the tank. A temperature sensor is provided at the center of the tank to control the boiling temperature, and a temperature sensor is provided at the bottom of the tank to detect the amount of remaining hot water in the tank and heat the hot water in the tank. Therefore, an economical hybrid electric water heater using solar heat as an auxiliary heat source can be provided, and a hybrid electric water heater capable of storing an appropriate amount of hot water by a temperature sensor can be provided.

In the hybrid electric water heater according to the present invention, when the temperature is lower than the temperature set by the temperature sensor, the upper heater heats the upper part of the heating tank, and then the lower heater heats the lower part of the heating tank. When the temperature is below the set temperature while the water is being heated by the lower heater and the temperature sensor is lower than the set temperature, the lower heater is de-energized and the upper heater is energized. Type electric water heater.

According to a third aspect of the present invention, there is provided the hybrid electric water heater according to the present invention, wherein the temperature sensor for detecting the amount of the remaining hot water is divided into three stages of 50 liters, 100 liters, and 150 liters from the top of the heating tank. Since it is installed, the energization time can be set in consideration of the amount of remaining hot water, and an economical hybrid electric water heater using late-night power can be provided.

The hybrid electric water heater of the present invention according to claim 4 is characterized in that the upper heater and the lower heater
Since the amount of boiling water is increased in accordance with an arbitrary hot water load, it is possible to provide an economical electric water heater capable of boiling only a necessary amount of heat.

According to a fifth aspect of the present invention, in the hybrid electric water heater according to the present invention, the boiling start time is set by the remaining hot water amount in the tank, the water temperature, the heater capacity, and the boiling temperature. The midnight power supply time can be set according to the amount of hot water, and an economic hybrid electric water heater can be provided.

According to a sixth aspect of the present invention, there is provided the hybrid electric water heater according to the present invention, wherein the hot and cold water in the tank is 200 to 750 kp.
Since it is pressurized to a, an electric water heater that can easily supply hot water to the second and third floors can be provided.

According to a seventh aspect of the present invention, in the hybrid electric water heater, the forced circulation of the antifreeze detects a temperature of the antifreeze near the heat collector and a temperature of the antifreeze near the heat exchanger. Because it is controlled by the temperature difference between the temperature sensor and the temperature sensor, the antifreeze is operated by the accurate temperature difference between the heat collector and the heat exchanger, and the solar heat can be efficiently absorbed.

In the hybrid electric water heater according to the present invention, the energization of the upper and lower heaters is stopped by detecting the pressure of the hot water in the tank. Prevents empty burning.

[0075]

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a state in which a heat exchanger capable of absorbing solar heat is incorporated in a hybrid electric water heater of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the inside of the tank of the hybrid electric water heater of the present invention is heated up.

FIGS. 3 (a) and 3 (b) are cross-sectional views showing a state in which the inside of the tank of the hybrid electric water heater of the present invention has increased boiling.

FIGS. 4 (a) and 4 (b) are cross-sectional views showing the state of increased boiling inside the tank of the hybrid electric water heater of the present invention.

FIG. 5 is a cross-sectional view showing a state in which boiling inside the tank of the hybrid electric water heater of the present invention is increased.

FIG. 6 is a cross-sectional view of the inside of the tank showing a state of collecting solar heat from an auxiliary heat source.

FIG. 7 is a sectional view of the inside of the tank showing a state of collecting solar heat from an auxiliary heat source.

FIG. 8 is a cross-sectional view of the inside of the tank showing a state of collecting solar heat from an auxiliary heat source.

FIG. 9 is a cross-sectional view of the inside of the tank showing a state of collecting solar heat from an auxiliary heat source.

FIG. 10 is a cross-sectional view of the inside of the tank showing a state of collecting solar heat from an auxiliary heat source.

[Explanation of symbols]

 Reference Signs List 10 hybrid electric water heater 11 tank 12 upper heater 13 lower heater 14 heat exchanger 15, 16, 17 temperature sensor 18 temperature sensor 19 temperature sensor 20 service tank 21 collector 22 temperature sensor 23 circulation path 24 circulation pump 25 water supply port 26 Outlet 27 Pressure switch

Claims (8)

[Claims] 1. Hot water in a tank is heated and stored by a heater provided above and below a heating tank above the tank and a heat exchanger provided in a hot water tank below the tank and radiating solar heat into the hot water tank. A hybrid electric water heater, wherein the heat exchanger is connected to a heat collector that collects solar heat and a conduit through which antifreeze is forcibly circulated, and a temperature sensor is provided at an interval above the tank. A hybrid electric water heater, in which a temperature sensor is provided at the center of the tank to detect the boiling temperature, and the hot water in the tank is heated by energizing the upper and lower heaters and collecting solar heat. . 2. When the temperature is lower than a set temperature of a temperature sensor,
After the upper part of the heating tank is boiled by the upper heater, the lower part of the heating tank is boiled by the lower heater. During the heating by the lower heater, when the temperature sensor becomes lower than the set temperature, the power supply to the lower heater is stopped. And the upper heater is energized.
A hybrid electric water heater as described. 3. A temperature sensor for detecting the amount of remaining hot water is 50 liters, 100 liters, 150 liters from the top of the heating tank.
The hybrid electric water heater according to claim 1, wherein the water heater is installed at a liter position. 4. The hybrid electric water heater according to claim 1, wherein the boiling water is increased by the upper heater and the lower heater according to an arbitrary hot water load. 5. The hybrid electric water heater according to claim 1, wherein the boiling start time is set based on the amount of hot water in the tank, the water temperature, the heater capacity, and the boiling temperature. 6. The water in the tank is 150 to 300 k.
2. The hybrid electric water heater according to claim 1, wherein the electric water is pressurized to pa. 7. The method according to claim 1, wherein the forced circulation of the antifreeze is controlled by a temperature difference between a temperature sensor for detecting the temperature of the antifreeze near the heat collector and a temperature sensor for detecting the temperature of the antifreeze near the heat exchanger. The hybrid electric water heater according to claim 1, characterized in that: 8. The hybrid electric water heater according to claim 1, wherein the energization of the upper and lower heaters is stopped by detecting a pressure of hot and cold water in the tank.