JPH0814665A - Energy saving type hot water feeding and heating facility - Google Patents

Abstract

PURPOSE:To enable an energy saving type hot water feeding and heating facility to be utilized also as a heating operation by a method wherein there are provided an outer easing forming an air guiding clearance between it and an outer surface of a hot water storing tank, having a high temperature medium discharging port at an upper part and a hot air discharging port at a lower part, and a heat exchanger for use in heating water stored in the hot water storing tank within an auxiliary heating tank. CONSTITUTION:As hot water HW is stored up to about a middle level within a hot water storing tank 1, hot air fed into a suction port 44 within an auxiliary heating tank 42 is retrieved from its heat by a heat exchanger 41 within an auxiliary heating tank 42, the air passes through a discharging port 45 and advances into an air guiding clearance 70. When the air passes through the air guiding clearance 70, heat is supplied to this air from hot water HW through the outer surface of the hot water storing tank 1, the air becomes high temperature air and then the air is discharged from a high temperature discharging port 72. In this case, as a hot water storing amount of the hot water HW is high in its volume, the air becomes easily air of high temperature. In turn, hot air of which heat has been removed by the lower outer surface of the hot water storing tank 1 when the air passes through the lower part within the air guiding clearance 70 from a hot air discharging port 73. Accordingly, each of air of high temperature and hot air each can be effectively utilized for the heating operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy-saving hot water supply and heating facility. More specifically, the present invention relates to a hot water supply and heating facility that is widely used for business and home use and can also be used for heating.

[0002]

2. Description of the Related Art Conventionally, various types of hot water supply equipment have been proposed, but none have a heating function.

[0003]

[Problems to be Solved by the Invention] If the heat generated and stored by the hot water supply facility that takes in energy such as solar heat and exhaust heat can be used for heating factories and homes without impairing the desired hot water supply function, it will contribute to energy saving. It is great to do. In view of such circumstances, it is an object of the present invention to provide hot water supply equipment that can be used for heating. It is another object of the present invention to provide a hot water supply / room heating system capable of rapidly boiling water to supply hot water in a short time.

[0004]

The energy-saving hot water supply / room heating equipment of the present invention comprises a hot water storage tank for connecting hot water supply pipes to the lower part and a hot water supply pipe to the upper part to store hot water sequentially from the upper side to the lower side, and the hot water storage tank. An intermittent water heater equipped with a heating tank separate from the tank and a heater provided in the heating tank, introducing water in the hot water storage tank to boil it into hot water, and send the hot water to the upper part in the hot water storage tank. An outer casing having a hot air exhaust port formed at the upper part and a hot air exhaust port at the lower part, which forms a baffle gap between the hot water storage tank and the outer surface of the hot water storage tank and takes out hot air.
An auxiliary heating tank provided with an intake port for introducing warm air and having an exhaust port connected to the outer casing, and provided in the auxiliary heating tank,
It is characterized by comprising a heat exchanger for heating the water in the hot water storage tank.

[0005]

In the present invention, when warm air is supplied to the auxiliary heating tank, the internal heat exchanger heats the water passing through the inside of the heat exchanger by the heat of the warm air, so that the water in the hot water storage tank can be preheated. . Since the intermittent water heater only needs to boil preheated hot water into hot water, it can boil rapidly to generate hot water in a short time as compared with boiling from water to hot water, and energy saving can be achieved. The hot water boiled by the intermittent water heater is sequentially stored from the upper side to the lower side of the hot water storage tank, so that the hot water can be taken out immediately when necessary. In addition, the warm air supplied to the auxiliary heating tank passes through the air guide gap in the outer casing, but when it passes through the part of the hot water storage tank that stores hot water during this period, it receives heat from the outer surface of the hot water storage tank. High-temperature air can be taken out from the high-temperature exhaust port formed in the upper part of the casing. Also, from the hot air exhaust port formed in the lower part of the outer casing,
The supplied warm air is deprived of heat by the heat exchanger inside the auxiliary heating monk, and when it passes through the air guide gap inside the outer casing, it is also deprived of heat by the lower part of the hot water storage tank and takes out the remaining hot air. be able to. If these high-temperature air and warm air are used for heating such as central heating, the heat can be effectively used without being wasted, resulting in energy saving.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. In FIG. 1, reference numeral 1 is a hot water storage tank, and a water supply pipe 13 is connected to the lower part of the hot water storage tank. The water supply pipe 13 is connected to a water pipe to supply water by lowering the pressure lower than the water pressure of the water pipe. A pressure reducing valve 14 for controlling the temperature is interposed, and a rectifier 12 is arranged immediately above the opening of the water supply pipe 13 in the hot water storage tank 1. A hot water supply pipe 15 is connected to the upper side, and a hot water supply plug 16 is interposed in the hot water supply pipe 15. The outer periphery of the hot water storage tank 1 is covered with a heat insulating material 2, and the outer periphery thereof is surrounded by an outer plate 3. A drain pipe 19 is connected to the bottom of the hot water storage tank 1.

A hot water inlet 61 and a hot water outlet 62 are formed on the side wall of the hot water storage tank 1, and a heat exchanger 41 is connected between the hot water inlet 61 and the water supply pipe 13. This heat exchanger
It is preferable to provide a large number of heat transfer blades 43 on the outer surface of 41 in order to improve heat transfer efficiency. The heat exchanger 41 is housed inside an auxiliary heating tank 42, and the auxiliary heating tank 42 has an intake port 44 for introducing warm air and an exhaust port 45 for discharging warm air.

An outer casing 71 is provided in a portion of the hot water storage tank 1 excluding the upper end thereof, and an air guide gap 70 is formed between the outer casing 71 and the outer surface of the hot water storage tank 1. A large number of heat transfer blades 43 are provided on the outer surface of the hot water storage tank 1 where the outer casing 71 is provided.
It is preferable to provide the above in order to improve the heat conduction efficiency.
A high temperature exhaust port 72 for taking out high temperature air is provided in the upper part of the outer casing 71, and a hot air exhaust port 73 for taking out the hot air is provided in the lower part. Further, a plurality of temperature sensors 75, 76, 77, 78 are attached to the outer surface of the hot water storage tank 1 at intervals vertically.

When warm air is supplied from the intake port 44 of the auxiliary heating tank 42, the heat exchanger 41 in the auxiliary heating tank 42 heats the water passing through the exchanger 41 by the heat of the warm air. Since the heated low / medium hot water has a density difference (specific gravity difference) with the cold water, cold water enters from below the heat exchanger 41 and low / medium hot water exits from above to repeat convection. By this convection operation, the water below the hot water storage tank 1 is heated to low / medium hot water. The warm air supplied to the auxiliary heating tank 42 can be used as high-temperature air or warm air for heating, which will be described later.

Reference numeral A denotes an intermittent water heater for producing hot water, which is connected between the hot water outlet 62 of the hot water storage tank 1 and the hot water supply pipe 15. The details will be described with reference to FIG. A heating tank 6 is connected with a water supply connection pipe 24 below the heating tank, and a rectifier 12 is installed immediately above the opening of the water supply connection pipe 24. The water supply connection pipe 24 is connected to the hot water outlet 62 of the hot water storage tank 1 and sends the low / medium hot water MW stored above the hot water outlet 62 in the hot water storage tank 1 to the heating tank 6. A hot water supply connection pipe is provided above the heating tank 6.
25 are connected, and this hot water supply connection pipe 25 is connected to the hot water supply pipe 15 of the hot water storage tank 1. A relief valve 38 is attached to the upper end of the hot water supply connection pipe 25. The relief valve 38 is a pressure control valve for maintaining the tank internal pressure at a predetermined value or less, for example, 1 kg / cm ² or less. Although not shown, the water supply connection pipe 24 and the hot water supply connection pipe 25 are preferably covered with an arbitrary heat insulating material.

The lower end of the hot water supply connection pipe 25 projects into the heating tank 6, and a temperature sensing on-off valve is provided at the opening at the lower end thereof.
11 (hereinafter referred to as on-off valve 11) is installed. In addition,
The on-off valve 11 may be provided in the middle of the hot water supply connection pipe 25 (however, it is preferable to be close to the heating tank 6), and the on-off valve 11 is attached to the uppermost part of the heating tank 6 so that The hot water supply connection pipe 25 may be connected to the upper portion. In any case, the hot water in the heating tank 6 reaches a predetermined temperature, the on-off valve 11 opens, and the hot water in the heating tank 6 passes through the hot water supply connection pipe 25,
It suffices if hot water can be sent to the upper part in the hot water storage tank 1. This on-off valve 11
Is a control valve that opens when the temperature of the hot water in the heating tank 6 reaches, for example, 90 ° C., and closes at a temperature below that. Mounting flange of the on-off valve 11 or hot water supply connection pipe slightly above
An air vent hole 21 is formed in the side wall of 25. The air vent hole 21 is provided to remove the air dissolved in the water and store the hot water in the heating tank 6 as much as possible. 5
Is a heater, which is the main heat source of the intermittent hot water heater A. A thermostat 22 is provided for controlling the hot water temperature.
The overheat protector is provided to prevent overheating.

In the intermittent hot water heater A described above, the hot water HW
When boiling water, water W or low / medium hot water MW (when the water in the lower part of the hot water storage tank 1 is not heated by the heat exchanger 41 is introduced as it is from the water supply connection pipe 24 into the heating tank 6. .
The same shall apply hereinafter) and the heater 5 is energized. At this time, the temperature of the water W or the low / medium-temperature hot water MW in the heating tank 6 is low, so the opening / closing valve 11 is closed, and the water W in the heating tank 6 or the low / medium-temperature hot water MW is trapped immovably. . Therefore, all the heat of the heater 5 is water W or low / medium-temperature hot water.
It is used to heat the MW and is efficiently boiled in hot water. In addition, the air dissolved in the heated water or the low / medium-temperature hot water is separated from the water or the hot water, but since the air passes from the air vent hole 21 through the hot water supply connection pipe 25 to the escape valve 38, There is no inconvenience that air accumulates in the upper part of the heating tank 6 and the amount of hot water decreases.

Water W in the heating tank 6 or low / medium-temperature hot water MW
When the hot water HW reaches a predetermined temperature (for example, 90 ℃), the on-off valve 11
Detects the high temperature and opens the valve, so that the hot water HW in the heating tank 6 can be taken out from the hot water supply connection pipe 25. Of course, since this boiling water HW was boiled in a trapped state, it does not mix with the low temperature water, and it has a uniform temperature.

When the hot water HW is taken out from the hot water supply connection pipe 25, the water W or the low / medium temperature hot water MW is supplied from the water supply connection pipe 24 into the heating tank 6 to fill the hot water HW while pushing it up. At this time, there is a large difference in density between the hot water HW and the water W or the low / medium-temperature hot water MW, and the two do not mix at the boundary portion L. Therefore, the hot water HW taken from the hot water supply connection pipe 25 is hot water containing no low-temperature hot water. When the water W or the low / medium-temperature hot water MW is full in the heating tank 6, the on-off valve 11 feels a low temperature and closes, so that the heating tank 6 is closed again and heated by the heater 5. It After that, when the above heating and hot water collection are repeated, the hot water HW is intermittently stored in the hot water storage tank 1
Hot water can be sequentially stored from the top to the bottom.

Next, the operation of the entire electric water heater will be described with reference to FIGS. In FIG. 1, hot water HW (solid shaded portion) is stored in the upper part of the hot water storage tank 1, and below the hot water HW, low / medium-temperature hot water MW only heated by the heat exchanger 41 (dotted diagonal line). Portion) is stored. Since there is a density difference (specific gravity difference) between the low / medium hot water MW and the hot water HW, they do not mix with each other. On the other hand, in the intermittent hot water heater A, the low / medium temperature hot water MW in the heating tank 6 is heated by the heater 5. The hot water in the heating tank 6 has a predetermined temperature (for example, 90 ° C)
At the hot water HW, the on-off valve 11 opens, so that the hot water rises due to the density difference and is stored in the upper part of the hot water storage tank 1 through the hot water supply connecting pipe 25 and the hot water collecting pipe 15 as shown by the solid arrow in FIG. . At this time, the low / medium hot water MW above the hot water outlet 62
Is sent to the heating tank 6 through the water supply connection pipe 24. Then, the on-off valve 11 in the heating tank 6 senses the low temperature and closes, and the heater 5 again boiles the low / medium-temperature hot water MW to the hot water HW. The boiled hot water HW is sent to the hot water storage tank 1 by the density difference as described above, and is sequentially stored from the top. After that, this phenomenon is repeated and the hot water storage tank 1
Hot water is stored inside. The state in which hot water is intermittently stored in the hot water storage tank 1 in this manner is shown by reference characters a, b, c, d, and e in FIG. In this embodiment, since the low / medium temperature hot water MW is boiled in the heating tank 6 instead of water, the hot water is heated.
The heating time by the heater 5 before boiling to HW is short. Further, when the hot water HW is taken out from the upper part of the hot water storage tank 1, the hot water HW can be taken out instantly and in a short time even after the hot water is exhausted.

Next, the heating function in this embodiment will be described. As shown in FIG. 1, assuming that the hot water HW is stored up to the middle of the hot water storage tank 1, the intake port of the auxiliary heating tank 42
The warm air sent to 44 is deprived of heat by the heat exchanger 41 in the auxiliary heating tank 42, and enters the air guide gap 70 through the exhaust port 45. When passing through the air guide space 70, heat is supplied from the hot water HW from the outer surface of the hot water storage tank 1 into high temperature air (high temperature air), which is discharged from the high temperature exhaust port 72. Therefore, the larger the amount of hot water stored in the hot water HW, the longer it takes the amount of heat than the hot water HW, and the more easily the air becomes hot. On the other hand, the lower hot air exhaust port 73
After passing through the air guide space 70 and passing through the lower part of the air guide space 70, hot air deprived of heat is discharged to the outer surface of the lower part of the hot water storage tank 1. If the high-temperature air and the hot air are used for heating depending on their uses, the heat can be effectively used without wasting, and energy can be saved. If the surface area of the heat transfer blade 43 is large, more heat can be received.

Even when the intake air temperature is low, the exhaust gas temperature can be increased by increasing the hot water storage amount in the hot water storage tank 1, and when the intake air temperature is high, the hot water storage amount in the hot water storage tank 1 is small. However, the exhaust temperature becomes high. In order to perform such control, the hot water storage amount in the hot water storage tank 1 may be adjusted by the temperature sensors 75 to 78 installed in the hot water storage tank 1 and the temperature sensor 79 installed in the intake port 44 to measure the intake air temperature. So, for example, a temperature sensor
When the temperature of the air in the intake port 44 measured at 79 is low, the temperature sensor 7 below the upper temperature sensor 75, 76
Hot water HW should be stored in hot water storage tank 1 until 7, 78 senses high temperature. Fig. 1 shows an example in which four temperature sensors 75 to 78 are attached, but the number is not limited to this, and
The number may be less than or equal to 5 or may be greater than or equal to 5. It goes without saying that the greater the number of attachments, the finer the control.

1 and 2, the hot exhaust port 72 and the warm air exhaust port
An example in which both 73 are provided is shown, but either one may be provided.
FIG. 4 shows an example in which only the high temperature exhaust port 72 is provided. The amount of hot water HW between the high-temperature exhaust port 72 and the hot water outlet 62 changes the temperature of the high-temperature air taken out from the high-temperature exhaust port 72, so that the hot-water HW in this region depends on the desired hot-water supply amount. If the intermittent hot-water supply device A's ability to generate hot water corresponding to the amount of hot water supply and the electric power that is continuously energized day and night are used so as not to run out of water, it can be used more comfortably.

As described above, for example, the warm air sent to the intake port 44 takes in energy such as solar heat and exhaust hot air, and the heater 5 in the heating tank 6 is supplied with the late-night power (electric power for which the night time is cheap). If the hot air or hot air is taken out after consumption, it can be used for hot water supply and heating such as central heating of houses and offices, which is convenient and has a large energy saving effect.

[0020]

According to the present invention, it is possible to provide a hot water supply and heating facility which has an immediate heating function of boiling water in a short time and can take out hot air for heating.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a hot water supply / room heating system according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a state when hot water is generated in the hot water supply / room heating equipment of FIG.

FIG. 3 is an explanatory diagram of an intermittent water heater A.

FIG. 4 is a vertical sectional view of a hot water supply / room heating equipment according to another embodiment of the present invention.

[Explanation of symbols]

1 Hot water storage tank A Intermittent water heater 6
Heating tank 11 Temperature sensing on-off valve 24 Water supply connection pipe 25
Hot water supply connection pipe 41 Heat exchanger 42 Auxiliary heating tank 43
Heat transfer blade 44 Inlet port 45 Exhaust port 70
Air guide air gap 71 Outer casing 72 Hot exhaust port 73
Hot air exhaust 75-79 Temperature sensor

Claims (4)

[Claims] 1. A water supply pipe is connected to a lower portion and a hot water supply pipe is connected to an upper portion,
A hot water storage tank for sequentially storing hot water from above, a heating tank separate from the hot water storage tank, and a heater provided in the heating tank are provided, and the water in the hot water storage tank is introduced into the hot water. An intermittent water heater that boiles the hot water to the upper part of the hot water storage tank and an outer surface of the hot water storage tank forms an air guide gap, and a high temperature exhaust port for taking out high temperature air is provided at the upper part,
An outer casing part having a warm air exhaust port for taking out warm air in the lower part, an intake port for introducing warm air, and an auxiliary heating tank for connecting the exhaust port to the outer casing part, and an auxiliary heating tank provided in the auxiliary heating tank. In addition, an energy-saving hot water supply and heating facility comprising a heat exchanger for heating the water in the hot water storage tank. 2. A hot water storage amount is selected and discharged according to an intake air temperature by a plurality of temperature sensors provided on the outer surface of the hot water storage tank at intervals in the vertical direction and a temperature sensor provided at an intake port of the auxiliary heating tank. The energy-saving hot-water supply / room heating equipment according to claim 1, wherein the temperature of the high-temperature air is controlled. 3. A heat transfer blade is provided on one or both of the outer surface of the hot water storage tank facing the air guide space and the outer surface of the heat exchanger of the auxiliary heating tank. Energy-saving hot water supply and heating equipment. 4. The energy-saving hot-water supply / heating equipment according to claim 1, wherein only the high temperature exhaust port or the hot air exhaust port is provided in the outer casing.